CN107504306B - The manufacturing method of the straight mouth reducing T of PVC straight pipe, PVC - Google Patents
The manufacturing method of the straight mouth reducing T of PVC straight pipe, PVC Download PDFInfo
- Publication number
- CN107504306B CN107504306B CN201710664083.8A CN201710664083A CN107504306B CN 107504306 B CN107504306 B CN 107504306B CN 201710664083 A CN201710664083 A CN 201710664083A CN 107504306 B CN107504306 B CN 107504306B
- Authority
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- China
- Prior art keywords
- tube
- pvc
- pipe
- straight
- barrel
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 31
- 238000003466 welding Methods 0.000 claims abstract description 86
- 238000010438 heat treatment Methods 0.000 claims abstract description 49
- 238000001816 cooling Methods 0.000 claims abstract description 11
- 238000012545 processing Methods 0.000 claims abstract description 8
- 238000005520 cutting process Methods 0.000 claims abstract description 5
- 239000004800 polyvinyl chloride Substances 0.000 claims description 89
- 229920000915 polyvinyl chloride Polymers 0.000 claims description 89
- 239000000463 material Substances 0.000 claims description 60
- 238000001125 extrusion Methods 0.000 claims description 49
- 238000001746 injection moulding Methods 0.000 claims description 44
- 238000000034 method Methods 0.000 claims description 41
- 238000002156 mixing Methods 0.000 claims description 40
- 239000004698 Polyethylene Substances 0.000 claims description 25
- 238000010521 absorption reaction Methods 0.000 claims description 25
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 22
- 238000002360 preparation method Methods 0.000 claims description 21
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 20
- -1 polyethylene Polymers 0.000 claims description 12
- 229920000573 polyethylene Polymers 0.000 claims description 12
- 239000012752 auxiliary agent Substances 0.000 claims description 11
- 238000000465 moulding Methods 0.000 claims description 11
- 239000004209 oxidized polyethylene wax Substances 0.000 claims description 11
- 235000013873 oxidized polyethylene wax Nutrition 0.000 claims description 11
- 239000012188 paraffin wax Substances 0.000 claims description 11
- 239000004408 titanium dioxide Substances 0.000 claims description 11
- 239000001993 wax Substances 0.000 claims description 11
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 10
- CJZGTCYPCWQAJB-UHFFFAOYSA-L calcium stearate Chemical compound [Ca+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O CJZGTCYPCWQAJB-UHFFFAOYSA-L 0.000 claims description 10
- 239000008116 calcium stearate Substances 0.000 claims description 10
- 235000013539 calcium stearate Nutrition 0.000 claims description 10
- 238000009826 distribution Methods 0.000 claims description 10
- 239000011347 resin Substances 0.000 claims description 10
- 229920005989 resin Polymers 0.000 claims description 10
- 239000003381 stabilizer Substances 0.000 claims description 10
- 235000021355 Stearic acid Nutrition 0.000 claims description 8
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims description 8
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims description 8
- 239000008117 stearic acid Substances 0.000 claims description 8
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 claims description 7
- 239000002245 particle Substances 0.000 claims description 5
- 238000002347 injection Methods 0.000 claims description 4
- 239000007924 injection Substances 0.000 claims description 4
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 241000469816 Varus Species 0.000 claims 1
- 238000005476 soldering Methods 0.000 description 24
- 210000004243 sweat Anatomy 0.000 description 21
- 230000001788 irregular Effects 0.000 description 7
- 238000003032 molecular docking Methods 0.000 description 7
- 239000002253 acid Substances 0.000 description 6
- 239000000126 substance Substances 0.000 description 6
- 239000002994 raw material Substances 0.000 description 5
- 239000000243 solution Substances 0.000 description 5
- 239000003795 chemical substances by application Substances 0.000 description 4
- 238000013461 design Methods 0.000 description 4
- 238000011161 development Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 150000002148 esters Chemical class 0.000 description 4
- 238000002844 melting Methods 0.000 description 4
- 239000000049 pigment Substances 0.000 description 4
- 229920003023 plastic Polymers 0.000 description 4
- 239000004033 plastic Substances 0.000 description 4
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 4
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 4
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 description 3
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000012943 hotmelt Substances 0.000 description 3
- 210000001503 joint Anatomy 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 description 3
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical compound C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 description 2
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 2
- 239000005977 Ethylene Substances 0.000 description 2
- 239000004609 Impact Modifier Substances 0.000 description 2
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 description 2
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Natural products C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 description 2
- 239000006229 carbon black Substances 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 229920001577 copolymer Polymers 0.000 description 2
- XCJYREBRNVKWGJ-UHFFFAOYSA-N copper(II) phthalocyanine Chemical compound [Cu+2].C12=CC=CC=C2C(N=C2[N-]C(C3=CC=CC=C32)=N2)=NC1=NC([C]1C=CC=CC1=1)=NC=1N=C1[C]3C=CC=CC3=C2[N-]1 XCJYREBRNVKWGJ-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 125000002534 ethynyl group Chemical group [H]C#C* 0.000 description 2
- 230000004927 fusion Effects 0.000 description 2
- 238000001879 gelation Methods 0.000 description 2
- 238000005461 lubrication Methods 0.000 description 2
- 238000004904 shortening Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 239000002562 thickening agent Substances 0.000 description 2
- GNFTZDOKVXKIBK-UHFFFAOYSA-N 3-(2-methoxyethoxy)benzohydrazide Chemical compound COCCOC1=CC=CC(C(=O)NN)=C1 GNFTZDOKVXKIBK-UHFFFAOYSA-N 0.000 description 1
- 239000005997 Calcium carbide Substances 0.000 description 1
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- CLZWAWBPWVRRGI-UHFFFAOYSA-N tert-butyl 2-[2-[2-[2-[bis[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]amino]-5-bromophenoxy]ethoxy]-4-methyl-n-[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]anilino]acetate Chemical compound CC1=CC=C(N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)C(OCCOC=2C(=CC=C(Br)C=2)N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)=C1 CLZWAWBPWVRRGI-UHFFFAOYSA-N 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L41/00—Branching pipes; Joining pipes to walls
- F16L41/02—Branch units, e.g. made in one piece, welded, riveted
- F16L41/021—T- or cross-pieces
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/76—Measuring, controlling or regulating
- B29C45/78—Measuring, controlling or regulating of temperature
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/92—Measuring, controlling or regulating
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L27/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers
- C08L27/02—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L27/04—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
- C08L27/06—Homopolymers or copolymers of vinyl chloride
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
- B29C2945/76—Measuring, controlling or regulating
- B29C2945/76494—Controlled parameter
- B29C2945/76531—Temperature
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
- B29C2945/76—Measuring, controlling or regulating
- B29C2945/76655—Location of control
- B29C2945/76658—Injection unit
- B29C2945/76668—Injection unit barrel
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
- B29C2945/76—Measuring, controlling or regulating
- B29C2945/76655—Location of control
- B29C2945/76658—Injection unit
- B29C2945/76688—Injection unit nozzle
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92504—Controlled parameter
- B29C2948/92704—Temperature
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92819—Location or phase of control
- B29C2948/92857—Extrusion unit
- B29C2948/92876—Feeding, melting, plasticising or pumping zones, e.g. the melt itself
- B29C2948/92895—Barrel or housing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92819—Location or phase of control
- B29C2948/92857—Extrusion unit
- B29C2948/92904—Die; Nozzle zone
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2023/00—Tubular articles
- B29L2023/22—Tubes or pipes, i.e. rigid
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/24—Pipe joints or couplings
- B29L2031/246—T-joints
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/18—Applications used for pipes
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
Abstract
The present invention relates to a kind of PVC straight pipes, the manufacturing method of the straight mouth reducing T of PVC, comprise the following steps: tube is cut into the length and angle of requirement using multi-angle electric tube cutter；The tube of well cutting is placed on welding machine clamp and is fixed；By the end face processing to be welded of 2 tubes to flat and smooth；End face is closed up, checks centering situation, two contact surface misalignments to be welded are no more than the 10% of wall thickness, are otherwise adjusted and are handled again to flat and smooth using the chucking power of fixture；Bonding machine heating plate is placed between two pipe ends, starting gradually to apply pressure P1 within the t1 time heats pipe end pressure on hot plate, and pressure is gradually reduced after forming uniform weldering pearl to P2 and is maintained at P2 and absorbs heat；Pipe end is unclamped, takes out heating plate, then close up pipe end；P1 is gradually forced into since 0, so that pipe welding position to being respectively formed uniform flange from inside to outside；Pressure P1 is kept, welding position natural cooling is made.
Description
Technical field
The present invention relates to tubing technical field, in particular to a kind of sweat soldering pvc pipe, Pipe joints and their manufacturing methods.
Background technique
Plastic conduit is as a kind of novel chemical building material at present, because it is with light-weight, easy for installation, corrosion-resistant
Many advantages, such as, it has been widely used in the fluid conveying in each field.
PVC pipeline is the principal item in plastic conduit, compared to more other plastic conduits intensity with higher and
Raw material sources are extensively and the advantages that relative low price, are development and application relatively morning and to be always maintained at good ecology potential in plastic conduit
The kind of head, in terms of the research and development of PVC pipeline, manufacturing enterprise suffers from keen interest in one's power for each Research Center.
The tensile strength of PVC pipeline can reach 50MPa or more, and PE pipeline only has 23MPa, and PP pipeline at most also can only achieve
35MPa.The synthetic route of PVC raw material has ethylene process synthetic route and acetylene method synthetic route, and the raw material of ethylene process is petroleum, is
Petrochemical industry route；The raw material of acetylene method is calcium carbide, is Coal Chemical Industry Route.China's oil is relatively nervous, and the reserves of coal are opposite
Compare abundant, with the continuous development of technology, the technology of China's carbide production PVC has obtained significant progress, and price is than only
PE, PP raw material that can be produced by petrochemical industry are cheap very much.
Currently, PVC pipe is extrusion molding process, pipe fitting (pipe fitting) is injection molding one-shot forming technique.In recent years, PVC
Effective amount constantly increases, and bore is also constantly expanding, and the PVC pipe bore of extrusion molding has reached 1600mm, but due to
By the limitation of the technical reasons such as injection-moulding device, molding die, PVC injection molding one-pass molding pipe fitting can only generally accomplish 200mm hereinafter,
Domestic only a small number of enterprises can accomplish 500mm bore, therefore large diameter pipeline can only use the metal materials such as steel, cast iron.By
In tubing, the unlike material of pipe fitting, the development of PVC pipeline is also objectively limited.
Also encounter in the development process of the polyolefin pipes such as PE, PP large-caliber pipe fittings can not directly injection molding ask
It inscribes, by being well solved with the method for tubing sweat soldering in actual use.
But PVC material can deviate from HCL at high temperature and decompose, and its decomposition temperature connects very much with processing and forming temperature
Closely, and because PVC is amorphous amorphous materials, the fusing point that do not fix cannot form stable melting when heated
Region and form good welding, so PVC pipeline there is presently no successfully realize using the method for sweat soldering produce it is big
Bore pipe fitting.
Chinese patent literature CN101112792A discloses a kind of PVC-M pipe hot melting and connecting method, it is by polyvinyl chloride
Tubing carries out join by fusion on butt fusion welding machine, and uses following steps: tubing to be welded or pipe fitting are fixedly clamped in machine by a.
On frame, the dirt of two pipe fittings and endface is removed in locked joints part；B. it preheats, preheating temperature is 25~35 DEG C；C. it docks
End surface carries out milling, makes its gap value no more than 0.3mm；D. check that tubing concentricity, maximum unfitness of butt joint are no more than tubing
The 5% of wall thickness；E. temperature of heating plate is heated to 210~230 DEG C, and guarantees that entire temperature of heating plate is uniform, it then will heating
Plate is placed in rack, is closed fixture；F. pressurization operation is heated, system pressure P1=P0+ heated pressure, heating, pressurization are set；g.
Pressure is reduced to P2 by heat absorption process, and P2=P0+ heat absorption pressure, numerical value is motoring pressure, and whole heat absorption with pressure is absorbed heat the time
It is 30~120 seconds；H. cooling process opens fixture, removes heating plate, rapid closing fixture, and evenly arrive pressure adjusting
P3, P3=P0+ cooling pressure, begin to cool, and cooling time is 10~30 minutes；I. pressure is reduced to zero, opens fixture, removes
Weld tubing or pipe fitting.It is also disclosed in detail: in step g, " 12. to pipe way protrusion uniformly, and flange height reaches and wants
To be approximately motoring pressure for P2(by pressure when asking), and absorb heat, start recording is absorbed heat the time: P2=P0+ heat absorption pressure
(heat absorption pressure is almost nil) ", and P0 is motoring pressure, then P2 is motoring pressure, motoring pressure is dragging pipe in machine
The minimum slip frictional force moved on frame, above-mentioned welding method and the sweat soldering of PE material are completely the same, the technical solution with
Scheme documented by disclosed " PE polyethylene pipe hot melt weld job guiding book " is identical: especially applying in heat absorption process
Add motoring pressure.But since PVC material is amorphous substance, the fusing point that do not fix, this point exists essential obvious with PE material
Difference: PE material has fixed fusing point, therefore PVC material cannot be formed surely when with heater plate as PE material
Fixed melt region.Due to conduction of heat, the temperature of tube heating along with the increase that is heated end face distance and gradually drop
Low, the softness number of respective material is also to gradually decrease.It is actually formed what one section of melt strength degree was gradually increased in endothermic process
The softening section unevenly melted, the softening section that this is unevenly melted in subsequent pressurization docking are extremely unstable, it is possible to
Warpage on the inside of tube wall, it is also possible to which warpage on the outside of to tube wall, this irregular warpage can make soldering opening form dislocation and round tube
Shape shape changes, that is, cannot form good welding, therefore the sweat soldering technology of PVC is not accomplished always, thus
PVC pipe is limited in the application in large diameter pipeline field.And in above-mentioned patent CN101112792A disclosure, it is absorbing heat
Stage remain unchanged take be with the sweat soldering of PE material consistent application P (dragging) i.e. motoring pressure, this is the PE material of standard
Welding procedure, can be inquired in the public materials such as each class standard, since PVC is without solid for the sweat soldering of PVC
Therefore determining this characteristic of solder joint can not effectively implement at all, the heat-melting butt-joint of pvc pipe: PE material can not be realized in practice
In the welding procedure of material, considering for motoring pressure is because the sweat soldering of PE tubing is substantially field operation, and PE tubing is very
Long, substantially all at 10 meters or more, therefore sweat soldering needs to consider that the scene when welding of longer tubing drags when field operation
When the minimum slip frictional force, this is to consider the pressure that execute-in-place environment is done, motoring pressure very little, and P1 is dragging pressure
40 to 120 times of power are definitely not to apply motoring pressure to can be achieved with the sweat soldering of PVC in the welding procedure of PVC.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of the big of achievable PVC pipe especially diameter 200mm or more
The welding of bore PVC pipe and the manufacturing method of the preferable PVC straight pipe of welding effect, the straight mouth reducing T of PVC.
Realize that one of the technical solution of the object of the invention is to provide the manufacturing method of the straight mouth reducing T of PVC, it is described
The straight mouth reducing T of PVC be two sections of pvc pipe shape objects hang down straight mouth made of welding, R mouthful or flat be flared the straight mouth reducer tee of PVC
Connector, including 1 the first single end head leads directly to tube, 1 Double-end leads directly to tube, flanging and in-flanges, first is single
It is straight mouth that it is one end that end, which leads directly to tube, and the other end is straight mouth, R mouthfuls or the flat pvc pipe shape object being flared；Double-end leads directly to tubulose
Object is that both ends are all straight mouth, R mouthfuls or the flat pvc pipe shape object being flared；First single end head leads directly to tube and Double-end leads directly to tubulose
Object reducing；The straight-through tube of first single end head is vertical with the Double-end axial middle part for leading directly to tube to be connect and is welded to connect one
It rises, and the first single end head leads directly to tube and Double-end leads directly to tube perforation, the first single end head leads directly to tube and Double-end
The in-flanges of the annular flanging that is located at periphery of the straight-through tube by being formed due to welding and the annular positioned inside
It links together；
The manufacturing method of the straight mouth reducing T of PVC is:
1. the pvc pipe shape object of corresponding extrusion or injection molding is chosen according to product specification, it will using multi-angle electric tube cutter
The length that pvc pipe shape object is cut into requirement obtains the first single end head and leads directly to tube and the straight-through tube of Double-end；Arc is used again
Saw according to Double-end lead directly to the straight mouth end that the outer diameter of tube leads directly to tube to the first single end head handle to obtain arc surfaced to
Welding end surface；
2. 1. the first single end head that step obtains is led directly to tube and Double-end leads directly to tube and is placed in welding machine clamp
It goes up and fixes, the first single end head leads directly to the axial middle part that tube leads directly to tube with Double-end and is vertically arranged；
3. end face is closed up, centering situation is checked, check that the first single end head leads directly to the end to be welded of the arc surfaced of tube
Whether face is aligned with the contact surface to be welded at the axial middle part that Double-end leads directly to tube, is such as otherwise carried out using the chucking power of fixture
Adjustment；
4. bonding machine heating plate is placed between two contact surfaces to be welded, starting gradually to apply pressure P1 within the t1 time makes pipe
Side pressure heats on hot plate, wherein welding temperature: 200~250 DEG C；Pressure is gradually reduced to P2 after forming uniform weldering pearl
And be maintained at P2 and absorb heat, the heat absorption time is t2；
5. unclamping pipe end within the t3 time, heating plate is taken out, then close up pipe end；
6. then P1 is gradually forced into since 0 within the t4 time, so that pipe welding position is uniform to being respectively formed from inside to outside
Flange；
7. keeping pressure P1 within the t5 time, welding position is made to naturally cool to 60 DEG C or less；
8. passing through aperture after the first single end head to link together is led directly to tube and the straight-through tube taking-up of Double-end
Device leads directly to tube from the first single end head and protrudes into the aperture on the tube wall that Double-end leads directly to tube, to obtain the PVC of perforation
Straight mouth reducing T；
Wherein, P1: pressure as defined in welding, unit MPa, P1=(0.15 ± 0.01) A/B, A indicate that the first single end head is straight
The sectional area of logical tube, B indicate the total effective area of piston in the hydraulic cylinder of bonding machine, and unit is square millimeter；
P2: holding pressure when heat absorption, P2=0.5~0.8P1,
T1: forming the time required for uniform weldering pearl, and unit is the second, and the size of t1 is observed to be formed according to execute-in-place
The duration variation of even weldering pearl；
T2: absorbing heat the time required for welding, and unit is the second, t2=tube wall thickness * 10, and tube wall thickness unit is millimeter；
T3: switching the time of defined, and unit is second, 1≤t3≤13；
T4: for adjustment pressure to the time of P1 defined, unit is second, 1≤t4≤18；
T5: cooling time, unit are minute, 10≤t5≤120.
Further, step 1. in, the pvc pipe shape object of the extrusion molding the preparation method is as follows: being used to prepare extrusion
The formula for forming the parts by weight of pvc pipe shape object is as follows: 100 parts of polyvinyl chloride resin, 0.4~4.5 part of stabilizer, and oxidized polyethylene wax 0.4
~1.0 parts, 0~0.8 part of polyethylene wax, 0~1.0 part of paraffin, 0~0.8 part of stearic acid, 0.1~0.5 part of calcium stearate, propylene
0~3.0 part of acid esters, 0~5.0 part of haloflex, 0~4.0 part of MBS auxiliary agent, 1.0~15.0 parts of calcium carbonate, titanium dioxide 0.2~
3.0 part；
The preparation process of the extrusion molding pvc pipe shape object includes the following steps: to be used to prepare extrusion molding according to above-mentioned
The formula of the parts by weight of pvc pipe shape object weighs each raw and auxiliary material, puts into high-speed mixer and carries out hot mixing, mixing temperature is extremely
It is put into cold mixing machine at 120 DEG C, releases stand-by when cold mixing is to 60 DEG C, it is raw that twin-screw tube extrusion is added in the material mixed
Tubing is cut into the length of requirement by producing line extrusion molding, if flared pipe fitting need to be made, is flared with pipe-expanding machine: flat
Mouthful or R mouthfuls；Extrusion process temperature: 170~190 DEG C of 1st area of barrel, 160~180 DEG C of 2nd area of barrel, 150~170 DEG C of 3rd area of barrel, material
140~160 DEG C of 4th area of cylinder, 140~160 DEG C of connector, 140~190 DEG C of mold, temperature is incremented by from connector to mouth mold, total bodily form
At two head heights, intermediate low Temperature Distribution.
Further, step 1. in, the pvc pipe shape object of the injection molding the preparation method is as follows: being used to prepare injection molding
The formula for forming the parts by weight of pvc pipe shape object is as follows: 100 parts of polyvinyl chloride resin, 0.4~4.5 part of stabilizer, and oxidized polyethylene wax 0.2
~0.5 part, 0~0.5 part of polyethylene wax, 0~0.6 part of paraffin, 0~0.5 part of stearic acid, 0.5~2.0 part of calcium stearate, propylene
0~3.0 part of acid esters, 0~5.0 part of haloflex, 0~4.0 part of MBS auxiliary agent, 1.0~15.0 parts of calcium carbonate, titanium dioxide 0.2~
3.0 part；
The preparation process of the injection molding pvc pipe shape object includes the following steps: to be used to prepare injection molding according to above-mentioned
The formula of the parts by weight of pvc pipe shape object weighs each raw and auxiliary material, puts into high-speed mixer and carries out hot mixing, mixing temperature is extremely
It is put into cold mixing machine at 120 DEG C, releases stand-by when cold mixing is to 60 DEG C, the material mixed addition double screw extruder is made
Grain, the particle investment injection molding machine molding made；It is granulated extrusion process temperature: 160~180 DEG C of 1st area of barrel, 2 area 150 of barrel~
170 DEG C, 140~160 DEG C of 3rd area of barrel, 130~150 DEG C of 4th area of barrel, 130~150 DEG C of connector, 130~170 DEG C of mold, temperature
Degree is incremented by from connector to mouth mold, generally forms two head heights, intermediate low Temperature Distribution；Injection molding temperature: nozzle 170~
190 DEG C, 165~185 DEG C of 1st area of barrel, 160~180 DEG C of 2nd area of barrel, 160~175 DEG C of 3rd area of barrel, 4 area 160~170 of barrel
DEG C, injection temperature gradually rises from feeding section to nozzle.
Further, the step 4. in welding temperature be 230~250 DEG C.
Realize a kind of the two of the technical solution of the object of the invention manufacturing method for being to provide PVC straight pipe, the PVC is straight-through
Pipe is straight mouth made of two sections of pvc pipe shape object welding, R mouthfuls or flat flaring PVC straight pipe, including 2 the first single end head straight pipes
Shape object, flanging and in-flanges, it is straight mouth that it is one end that the first single end head, which leads directly to tube, and the other end is straight mouth, R mouthfuls or flat expansion
The pvc pipe shape object of mouth；2 the first single end heads lead directly to tube level and are oppositely arranged and are welded together, by due to weldering
The in-flanges of the flanging and the annular positioned inside that connect the annular for being located at periphery to be formed links together；
The manufacturing method of the PVC straight pipe:
1. the pvc pipe shape object of corresponding extrusion or injection molding is chosen according to product specification, it will using multi-angle electric tube cutter
The first single end head that the length that pvc pipe shape object is cut into requirement obtains 2 unified specifications leads directly to tube；
2. the first single end head of well cutting is led directly to tube to be placed on welding machine clamp and fix, 2 first single-ended
The straight-through horizontal face setting of tube；
3. the end face processing to be welded that 2 the first single end heads lead directly to the pipe end of tube is met welding to flat and smooth
It is required that being suitable for coincideing: the contact surface to be welded of two pipe ends planishing to uniform to go out to consider to be worth doing with the planing tool on bonding machine；
4. end face is closed up, centering situation is checked, two contact surface misalignments to be welded are no more than the 10% of wall thickness, otherwise utilize folder
The chucking power of tool is adjusted and end face of planishing again；
5. bonding machine heating plate is placed between two pipe ends, starting gradually to apply pressure P1 within the t1 time is pressed in pipe end
It is heated in heating plate, wherein welding temperature: 200~250 DEG C；Pressure is gradually reduced to P2 after forming uniform weldering pearl and is kept
It absorbs heat in P2, the heat absorption time is t2；
6. unclamping pipe end within the t3 time, heating plate is taken out, then close up pipe end；
7. then P1 is gradually forced into since 0 within the t4 time, so that pipe welding position is uniform to being respectively formed from inside to outside
Flange；
8. keeping pressure P1 within the t5 time, welding position is made to naturally cool to 60 DEG C or less；
Wherein, P1: pressure as defined in welding, unit MPa, P1=(0.15 ± 0.01) A/B, A indicate pvc pipe shape object
Sectional area, B indicate the total effective area of piston in the hydraulic cylinder of bonding machine, and unit is square millimeter；
P2: holding pressure when heat absorption, P2=0.5~0.8P1,
T1: forming the time required for uniform weldering pearl, and unit is the second, and the size of t1 is observed to be formed according to execute-in-place
The duration variation of even weldering pearl；
T2: absorbing heat the time required for welding, and unit is the second, t2=tube wall thickness * 10, and tube wall thickness unit is millimeter；
T3: switching the time of defined, and unit is second, 1≤t3≤13；
T4: for adjustment pressure to the time of P1 defined, unit is second, 1≤t4≤18；
T5: cooling time, unit are minute, 10≤t5≤120.
Further, step 1. in, the pvc pipe shape object of the extrusion molding the preparation method is as follows: being used to prepare extrusion
The formula for forming the parts by weight of pvc pipe shape object is as follows: 100 parts of polyvinyl chloride resin, 0.4~4.5 part of stabilizer, and oxidized polyethylene wax 0.4
~1.0 parts, 0~0.8 part of polyethylene wax, 0~1.0 part of paraffin, 0~0.8 part of stearic acid, 0.1~0.5 part of calcium stearate, propylene
0~3.0 part of acid esters, 0~5.0 part of haloflex, 0~4.0 part of MBS auxiliary agent, 1.0~15.0 parts of calcium carbonate, titanium dioxide 0.2~
3.0 part；
The preparation process of the extrusion molding pvc pipe shape object includes the following steps: to be used to prepare extrusion molding according to above-mentioned
The formula of the parts by weight of pvc pipe shape object weighs each raw and auxiliary material, puts into high-speed mixer and carries out hot mixing, mixing temperature is extremely
It is put into cold mixing machine at 120 DEG C, releases stand-by when cold mixing is to 60 DEG C, it is raw that twin-screw tube extrusion is added in the material mixed
Tubing is cut into the length of requirement by producing line extrusion molding, if flared pipe fitting need to be made, is flared with pipe-expanding machine: flat
Mouthful or R mouthfuls；Extrusion process temperature: 170~190 DEG C of 1st area of barrel, 160~180 DEG C of 2nd area of barrel, 150~170 DEG C of 3rd area of barrel, material
140~160 DEG C of 4th area of cylinder, 140~160 DEG C of connector, 140~190 DEG C of mold, temperature is incremented by from connector to mouth mold, total bodily form
At two head heights, intermediate low Temperature Distribution.
Further, step 1. in, the pvc pipe shape object of the injection molding the preparation method is as follows: being used to prepare injection molding
The formula for forming the parts by weight of pvc pipe shape object is as follows: 100 parts of polyvinyl chloride resin, 0.4~4.5 part of stabilizer, and oxidized polyethylene wax 0.2
~0.5 part, 0~0.5 part of polyethylene wax, 0~0.6 part of paraffin, 0~0.5 part of stearic acid, 0.5~2.0 part of calcium stearate, propylene
0~3.0 part of acid esters, 0~5.0 part of haloflex, 0~4.0 part of MBS auxiliary agent, 1.0~15.0 parts of calcium carbonate, titanium dioxide 0.2~
3.0 part；
The preparation process of the injection molding pvc pipe shape object includes the following steps: to be used to prepare injection molding according to above-mentioned
The formula of the parts by weight of pvc pipe shape object weighs each raw and auxiliary material, puts into high-speed mixer and carries out hot mixing, mixing temperature is extremely
It is put into cold mixing machine at 120 DEG C, releases stand-by when cold mixing is to 60 DEG C, the material mixed addition double screw extruder is made
Grain, the particle investment injection molding machine molding made；It is granulated extrusion process temperature: 160~180 DEG C of 1st area of barrel, 2 area 150 of barrel~
170 DEG C, 140~160 DEG C of 3rd area of barrel, 130~150 DEG C of 4th area of barrel, 130~150 DEG C of connector, 130~170 DEG C of mold, temperature
Degree is incremented by from connector to mouth mold, generally forms two head heights, intermediate low Temperature Distribution；Injection molding temperature: nozzle 170~
190 DEG C, 165~185 DEG C of 1st area of barrel, 160~180 DEG C of 2nd area of barrel, 160~175 DEG C of 3rd area of barrel, 4 area 160~170 of barrel
DEG C, injection temperature gradually rises from feeding section to nozzle.
Further, the step 5. in welding temperature be 230~250 DEG C.
The present invention has the effect of positive: (1) present invention conducts in-depth research PVC pipeline hot-melt technology, passes through
A large amount of test and experiment successfully solve the problems, such as thermal stability problems and the good welding of formation during weld heating.It is right
The pipe fitting being welded carries out pressure explosion test, and blow-up point thinks that the flange that weld is formed is practical not in weld
The thickness of weld is increased, to increase intensity, its compressive resistance is made to be greater than bulk strength.
(2) heating temperature is high in the welding process by the present invention: normal PVC processing temperature is not higher than 200 DEG C, but this method
Middle temperature of heating plate is 200-250 DEG C.The purpose for improving temperature of heating plate is: making the material rapid melting for being close to heating plate, contracting
Short heating time, while the time of heat transmitting is also shortened, minimize the softening section unevenly melted, to avoid subsequent
Docking irregular warpage occurs；Tube is really carried out secondary operation by sweat soldering, and material is in first time tube
In molding process, it sufficiently is plasticized (gelation), forms the reticular structure that strand is mutually wound.In subsequent hot melt
When welding, melt tube port sufficiently, strand solution twines, it is necessary to enough thermal energy is obtained, so, in sweat soldering
When technological temperature it is higher than first time tube forming temperature, generally at 230 DEG C or so, this be also PVC formula in address it is steady
Determine the reason of agent dosage is than normal high 30%.
(3) pressure of minimum 0.5P1 the present invention whole pressurization in the welding process: is kept even if absorbing heat the period.
The purpose is under pressure:
1, heating plate can heat the face of being heated more quickly, shorten heating time, also shorten the time of heat transmitting, make not
The softening section of uniform melt minimizes, to avoid subsequent docking that irregular warpage occurs；
2, the material melted earliest overflows under the pressure of heating plate to the inside and outside two sides of pipe, prevents thermal history longer molten
Body is trapped in welding end surface and influences weld strength.But heat absorption pressure can not be greater than 0.8P1, the material otherwise melted is complete
Portion is overflowed, and is stayed in the practical fusing not yet of material of welding end surface and is formed rosin joint.
(4) stabilization of the PVC formula of the preparation process of injection molding PVC of the invention or extrusion molding pvc pipe shape object
Agent dosage is higher by 30% than normal, is suitable for PVC of the invention by it and welds.
(5) present invention realizes the sweat soldering of heavy caliber PVC pipe, has filled up the blank in the industry in this field, effectively
The use scope for improving PVC pipeline.
Detailed description of the invention
Fig. 1 is the pressure versus time welding procedure schematic diagram of the manufacturing method of sweat soldering PVC pipe of the invention；
Fig. 2 to Fig. 4 is respectively straight mouth, R mouthfuls and the flat schematic diagram (section view) for being flared PVC straight pipe；
Fig. 5 to Fig. 7 is respectively straight mouth, R mouthfuls and the flat schematic diagram (section view) for being flared the straight mouth reducing T of PVC.
Label in above-mentioned attached drawing is as follows:
First single end head leads directly to tube 11, and Double-end leads directly to tube 12, flanging 2, in-flanges 3.
Specific embodiment
(embodiment 1, be used to prepare extrusion molding pvc pipe shape object parts by weight formula and its preparation process)
Sweat soldering PVC pipe, in addition to the molding of guarantee pvc pipe shape object (extrusion or injection molding), is gone back in formula design
It should fully consider subsequent welding fabrication.Material is through pvc pipe shape object moulding process, under the action of heat and mechanical shear stress,
It is sufficiently plasticized (gelation), forms the reticular structure that strand is mutually wound.In subsequent sweat soldering, to make pvc pipe
Shape object port is sufficiently melted, and strand solution twines, it is necessary to enough thermal energy is obtained, so, the technological temperature in sweat soldering
Higher than first time pvc pipe shape object forming temperature, generally at 230 DEG C or so, this requires design thermal stability to be preferably formulated, surely
The normal tube of amount ratio for determining agent is high by 30% or more.PVC-U is the stronger polymer of polarity, with some nonpolar lubricants
Compatibility is poor, is easy to migrate to heating surface when carrying out sweat soldering heating, to will affect weld strength, so being formulated
In should reduce the addition of apolar substance to the greatest extent, as long as being able to satisfy the processing and forming of tube, it is also possible to segment polarity object
Substitution, such as polyethylene wax, paraffin are replaced with oxidized polyethylene wax.The molding of pvc pipe shape object is divided into extrusion molding and is molded into
Type, flow behavior have the characteristics that different.Extrusion molding is " slide wall flowing ", it is desirable that outer lubrication is laid particular stress on when formula design, and
Injection molding is " viscous wall flowing ", therefore interior lubrication should be laid particular stress on by being formulated design.
A kind of formula of parts by weight being used to prepare extrusion molding pvc pipe shape object of the present embodiment is as follows: polyvinyl chloride resin 100
Part, it is 0.4~4.5 part of stabilizer, 0.4~1.0 part of oxidized polyethylene wax, 0~0.8 part of polyethylene wax, 0~1.0 part of paraffin, stearic
0~0.8 part of acid, 0.1~0.5 part of calcium stearate, 0~3.0 part of acrylate (ACR), 0~5.0 part of haloflex (CPE),
0~4.0 part of MBS auxiliary agent, 1.0~15.0 parts of calcium carbonate, 0.2~3.0 part of titanium dioxide, appropriate pigment, pigment is such as in the present embodiment
Under: 0.2~2.0 part of titanium dioxide, 0~0.1 part of phthalocyanine blue, 0~0.1 part of carbon black.Wherein MBS auxiliary agent be methyl methacrylate,
Butadiene, styrene copolymer are one of most important impact modifier of PVC.
The preparation process of the extrusion molding pvc pipe shape object includes the following steps: to be used to prepare extrusion molding according to above-mentioned
The formula of the parts by weight of pvc pipe shape object weighs each raw and auxiliary material, puts into high-speed mixer and carries out hot mixing, mixing temperature is extremely
It is put into cold mixing machine at 120 DEG C, releases stand-by when cold mixing is to 60 DEG C, it is raw that twin-screw tube extrusion is added in the material mixed
Tubing is cut into the length of requirement by producing line extrusion molding, if flared pipe fitting need to be made, is flared with pipe-expanding machine: flat
Mouthful or R mouthfuls.Extrusion process temperature: 170~190 DEG C of 1st area of barrel, 160~180 DEG C of 2nd area of barrel, 150~170 DEG C of 3rd area of barrel, material
140~160 DEG C of 4th area of cylinder, 140~160 DEG C of connector, 140~190 DEG C of mold, temperature is incremented by from connector to mouth mold, total bodily form
At two head heights, intermediate low Temperature Distribution, so that cold material quickly heats, the quick outlet mold of high-temperature fusant is conducive to material
It is sufficiently plasticized and thickener will not be decomposed.
(embodiment 2, be used to prepare injection molding pvc pipe shape object parts by weight formula and its preparation process)
A kind of formula of parts by weight being used to prepare injection molding pvc pipe shape object of the present embodiment is as follows: polyvinyl chloride resin 100
Part, it is 0.4~4.5 part of stabilizer, 0.2~0.5 part of oxidized polyethylene wax, 0~0.5 part of polyethylene wax, 0~0.6 part of paraffin, stearic
0~0.5 part of acid, 0.5~2.0 part of calcium stearate, acrylate ACR0~3.0 part, haloflex CPE0~5.0 part, MBS helps
0~4.0 part of agent, 1.0~15.0 parts of calcium carbonate, 0.2~3.0 part of titanium dioxide, appropriate pigment, pigment is as follows in the present embodiment: titanium
0.2~2.0 part of white powder, 0~0.1 part of phthalocyanine blue, 0~0.1 part of carbon black.Wherein MBS auxiliary agent is methyl methacrylate, fourth two
Alkene, styrene copolymer are one of most important impact modifier of PVC.
The preparation process of the injection molding pvc pipe shape object includes the following steps: to be used to prepare injection molding according to above-mentioned
The formula of the parts by weight of pvc pipe shape object weighs each raw and auxiliary material, puts into high-speed mixer and carries out hot mixing, mixing temperature is extremely
It is put into cold mixing machine at 120 DEG C, releases stand-by when cold mixing is to 60 DEG C, the material mixed addition double screw extruder is made
Grain, the particle investment injection molding machine molding made.It is granulated extrusion process temperature: 160~180 DEG C of 1st area of barrel, 2 area 150 of barrel~
170 DEG C, 140~160 DEG C of 3rd area of barrel, 130~150 DEG C of 4th area of barrel, 130~150 DEG C of connector, 130~170 DEG C of mold, temperature
Degree is incremented by from connector to mouth mold, generally forms two head heights, intermediate low Temperature Distribution, so that cold material quickly heats, it is high
The warm quick outlet mold of melt is conducive to material and is sufficiently plasticized and will not decompose thickener.Injection molding temperature: nozzle 170~190
DEG C, 165~185 DEG C of 1st area of barrel, 160~180 DEG C of 2nd area of barrel, 160~175 DEG C of 3rd area of barrel, 160~170 DEG C of 4th area of barrel, note
Modeling temperature gradually rises from feeding section to nozzle.
(manufacturing method of embodiment 3, sweat soldering PVC pipe)
See Fig. 1, the manufacturing method of the sweat soldering PVC pipe of the present embodiment comprises the following steps:
1. choosing the extrusion molding pvc pipe shape object obtained accordingly by embodiment 1 according to product specification or being obtained by embodiment 2
Pvc pipe shape object, the length and angle of requirement are cut into using multi-angle electric tube cutter by the injection molding pvc pipe shape object arrived；
2. the pvc pipe shape object of well cutting to be placed on welding machine clamp and fix；
3. the end face processing to be welded of the pipe end of 2 pvc pipe shape objects, which is met welding requirements to flat and smooth, is suitable for kiss
It closes；
4. end face is closed up, centering situation is checked, two contact surface misalignments to be welded are no more than the 10% of wall thickness, otherwise utilize folder
The chucking power of tool is adjusted and is handled again to flat and smooth；
5. bonding machine heating plate is placed between two pipe ends, starting gradually to apply pressure P1 within the t1 time is pressed in pipe end
It is heated in heating plate, wherein welding temperature (i.e. temperature of heating plate): 200~250 DEG C, preferably 230~250 DEG C；It is uniform being formed
Weldering pearl after gradually reduce pressure to P2 and be maintained at P2 and absorb heat, the heat absorption time is t2；
6. unclamping pipe end within the t3 time, heating plate is taken out, then close up pipe end；
7. then P1 is gradually forced into since 0 within the t4 time, so that pipe welding position is uniform to being respectively formed from inside to outside
Flange；
8. keeping pressure P1 within the t5 time, welding position is made to naturally cool to 60 DEG C or less；
9. taking out the welding that product carries out next weld bond.
In the above method, P1: pressure (gauge pressure, MPa) as defined in welding, P1=(0.15 ± 0.01) A/B, A indicate pvc pipe
Sectional area (the mm of shape object2), B indicates the total effective area (mm of piston in the hydraulic cylinder of bonding machine2)；
P2: holding pressure when heat absorption, P2=0.5~0.8P1,
T1: forming the time (s) required for uniform weldering pearl, and the size of t1 is observed to form uniformly weldering pearl according to execute-in-place
Duration variation；
T2: absorbing heat time (s) required for welding, t2=tube wall thickness (mm) * 10；
T3: switch the time (s) of defined, 1≤t3≤13；
T4: time (s) of the adjustment pressure to P1 defined, 1≤t4≤18；
T5: cooling time (min), 10≤t5≤120.
Since PVC material is amorphous substance, the fusing point that do not fix cannot be formed stable when with heater plate
Melt region.Due to conduction of heat, the temperature of pvc pipe shape object heating along with the increase that is heated end face distance and gradually drop
Low, the softness number of respective material is also to gradually decrease.It is actually formed what one section of melt strength degree was gradually increased in endothermic process
The softening section unevenly melted, the softening section that this is unevenly melted in subsequent pressurization docking are extremely unstable, it is possible to
Warpage on the inside of tube wall, it is also possible to which warpage on the outside of to tube wall, this irregular warpage can make soldering opening form dislocation and round tube
Shape shape changes, that is, cannot form good welding, so having to keep the pressure of P2, P2=0.5 P2 in the t2 stage
As heat absorption pressure, size is 30 to 50 times of the size of the motoring pressure under same situation by~0.8P1, P2.It must in the t2 stage
The pressure of P2 minimum 0.5P1 need be kept, heating plate can be enable to heat the face of being heated more quickly, shortens heating time,
The time for shortening heat transmitting, minimize the softening section unevenly melted, so that it is irregular to avoid subsequent docking from occurring
Warpage；And the material melted earliest overflows under the pressure of heating plate to the inside and outside two sides of pipe, prevents thermal history longer molten
Body is trapped in welding end surface and influences weld strength.But heat absorption pressure can not be greater than 0.8P1, the material otherwise melted is complete
Portion is overflowed, and is stayed in the practical fusing not yet of material of welding end surface and is formed rosin joint.
(embodiment 4, PVC straight pipe and its manufacturing method)
See that Fig. 2 to Fig. 4, the PVC straight pipe of the present embodiment are straight mouth made of two sections of pvc pipe shape object welding, R mouthfuls or flat expansion
Mouth PVC straight pipe, including 2 the first single end heads lead directly to tube 11, flanging 2 and in-flanges 3, the first single end head straight pipe
Shape object 11 be straight mouth by one end that embodiment 1 or 2 is prepared, the other end is the pvc pipe shape of straight mouth, R mouthfuls or flat flaring
Object；2 the first single end heads lead directly to 11 level of tube and are oppositely arranged and are welded together, and pass through the position formed due to welding
Flanging 2 in the annular of periphery and the in-flanges 3 of the annular positioned inside link together.
The manufacturing method of the PVC straight pipe of the present embodiment:
1. choosing the extrusion molding pvc pipe shape object obtained accordingly by embodiment 1 according to product specification or being obtained by embodiment 2
The length that pvc pipe shape object is cut into requirement is obtained 2 unifications using multi-angle electric tube cutter by the injection molding pvc pipe shape object arrived
First single end head of specification leads directly to tube 11；
It welds on machine clamp and fixes 2. the first single end head of well cutting is led directly to tube 11 and is placed in, 2 first single
End leads directly to the setting of the horizontal face of tube 11；
3. the end face processing to be welded that 2 the first single end heads lead directly to the pipe end of tube 11 is met weldering to flat and smooth
It connects requirement to be suitable for coincideing: the contact surface to be welded of two pipe ends planishing to uniform to go out to consider to be worth doing with the planing tool on bonding machine；
4. end face is closed up, centering situation is checked, two contact surface misalignments to be welded are no more than the 10% of wall thickness, otherwise utilize folder
The chucking power of tool is adjusted and end face of planishing again；
5. bonding machine heating plate is placed between two pipe ends, starting gradually to apply pressure P1 within the t1 time is pressed in pipe end
It is heated in heating plate, wherein welding temperature (i.e. temperature of heating plate): 200~250 DEG C, preferably 230~250 DEG C；It is uniform being formed
Weldering pearl after gradually reduce pressure to P2 and be maintained at P2 and absorb heat, the heat absorption time is t2；
6. unclamping pipe end within the t3 time, heating plate is taken out, then close up pipe end；
7. then P1 is gradually forced into since 0 within the t4 time, so that pipe welding position is uniform to being respectively formed from inside to outside
Flange；
8. keeping pressure P1 within the t5 time, welding position is made to naturally cool to 60 DEG C or less.
In the above method, P1: pressure (gauge pressure, MPa) as defined in welding, P1=(0.15 ± 0.01) A/B, A indicate pvc pipe
Shape object i.e. the first single end head leads directly to the sectional area (mm of tube 112), B indicates total significant surface of piston in the hydraulic cylinder of bonding machine
Product (mm2)；
P2: holding pressure when heat absorption, P2=0.5~0.8P1,
T1: forming the time (s) required for uniform weldering pearl, and the size of t1 is observed to form uniformly weldering pearl according to execute-in-place
Duration variation；
T2: absorbing heat time (s) required for welding, t2=tube wall thickness (mm) * 10；
T3: switch the time (s) of defined, 1≤t3≤13；
T4: time (s) of the adjustment pressure to P1 defined, 1≤t4≤18；
T5: cooling time (min), 10≤t5≤120.
In the present embodiment, according to the above method be 315mm to caliber, tube wall thickness 13mm, pipe range are 520mm 2
First single end head leads directly to tube 11 and carries out sweat soldering, then sectional area A=12327.6mm of pvc pipe shape object2, the liquid of bonding machine
Total effective area B=2000mm of piston in cylinder pressure2, P1=(0.15 ± 0.01) A/B=0.92Mpa, P2=0.5Mpa, t1=25s,
T2=130s, t3=8s, t4=8s, t5=12min, temperature of heating plate=235 DEG C calculate under the operating environment of the present embodiment
It (is dragged) to its P (dragging)=0.01Mpa, P2=0.5Mpa=50P, the size of P2 is 50 times of the size of the motoring pressure under same situation,
It (is dragged) much larger than P.
Since PVC material is amorphous substance, the fusing point that do not fix cannot be formed stable when with heater plate
Melt region.Due to conduction of heat, the temperature of pvc pipe shape object heating along with the increase that is heated end face distance and gradually drop
Low, the softness number of respective material is also to gradually decrease.It is actually formed what one section of melt strength degree was gradually increased in endothermic process
The softening section unevenly melted, the softening section that this is unevenly melted in subsequent pressurization docking are extremely unstable, it is possible to
Warpage on the inside of tube wall, it is also possible to which warpage on the outside of to tube wall, this irregular warpage can make soldering opening form dislocation and round tube
Shape shape changes, that is, cannot form good welding, so having to keep the pressure of P2, P2=0.5 P2 in the t2 stage
As heat absorption pressure, size is 30 to 50 times of the size of the motoring pressure under same situation by~0.8P1, P2.It must in the t2 stage
The pressure of P2 minimum 0.5P1 need be kept, heating plate can be enable to heat the face of being heated more quickly, shortens heating time,
The time for shortening heat transmitting, minimize the softening section unevenly melted, so that it is irregular to avoid subsequent docking from occurring
Warpage；And the material melted earliest overflows under the pressure of heating plate to the inside and outside two sides of pipe, prevents thermal history longer molten
Body is trapped in welding end surface and influences weld strength.But heat absorption pressure can not be greater than 0.8P1, the material otherwise melted is complete
Portion is overflowed, and is stayed in the practical fusing not yet of material of welding end surface and is formed rosin joint.
(the straight mouth reducing T of embodiment 3, PVC and its manufacturing method)
See Fig. 5 to Fig. 7, the straight mouth reducing T of the PVC of the present embodiment is that two sections of pvc pipe shape objects hang down made of welding directly
Mouth, R mouthfuls or the flat flaring straight mouth reducing T of PVC, including 1 the first single end head lead directly to 11,1 Double-ends of tube and lead directly to
Tube 12, flanging 2 and in-flanges, it is one be prepared by embodiment 1 or 2 that the first single end head, which leads directly to tube 11,
End is straight mouth, and the other end is straight mouth, R mouthfuls or the flat pvc pipe shape object being flared；It is by embodiment 1 that Double-end, which leads directly to tube 12,
Or 2 the both ends that are prepared all be straight mouth, R mouthfuls or flat flaring pvc pipe shape object；First single end head leads directly to tube 11 and both-end
Straight-through 12 reducing of tube；The straight-through tube 11 of first single end head is vertical with the axial middle part of the straight-through tube 12 of Double-end to be connected
It connects and is welded together, and the first single end head leads directly to tube 11 and leads directly to the perforation of tube 12 with Double-end, first is single-ended
Straight-through tube 11 and Double-end lead directly to tube 12 by the flanging 2 of the annular for being located at periphery formed due to welding with
And the in-flanges of the annular positioned inside links together.
The manufacturing method of the straight mouth reducing T of the PVC of the present embodiment is:
1. choosing the extrusion molding pvc pipe shape object obtained accordingly by embodiment 1 according to product specification or being obtained by embodiment 2
The injection molding pvc pipe shape object arrived, the length acquisition first that pvc pipe shape object is cut into requirement using multi-angle electric tube cutter are single-ended
Straight-through tube 11 and Double-end lead directly to tube 12；It is sawed again with arc and the outer diameter of tube 12 is led directly to the according to Double-end
The straight mouth end that one single end head leads directly to tube 11 handles to obtain the contact surface to be welded of arc surfaced；
2. 1. the first single end head that step obtains is led directly to tube 11 and Double-end leads directly to tube 12 and is placed in bonding machine
It on fixture and fixes, the first single end head leads directly to the axial middle part that tube 11 leads directly to tube 12 with Double-end and is vertically arranged；
3. end face is closed up, centering situation is checked, check that the first single end head leads directly to the to be welded of the arc surfaced of tube 11
Whether end face is aligned with the contact surface to be welded at the axial middle part that Double-end leads directly to tube 12, such as otherwise utilizes the chucking power of fixture
It is adjusted；
4. bonding machine heating plate is placed between two contact surfaces to be welded, starting gradually to apply pressure P1 within the t1 time makes pipe
Side pressure heats on hot plate, wherein welding temperature (i.e. temperature of heating plate): 200~250 DEG C, preferably 230~250 DEG C；In shape
At gradually reducing pressure after uniform weldering pearl to P2 and being maintained at P2 and absorb heat, the heat absorption time is t2；
5. unclamping pipe end within the t3 time, heating plate is taken out, then close up pipe end；
6. then P1 is gradually forced into since 0 within the t4 time, so that pipe welding position is uniform to being respectively formed from inside to outside
Flange；
7. keeping pressure P1 within the t5 time, welding position is made to naturally cool to 60 DEG C or less；
8. passing through after the first single end head to link together is led directly to tube 11 and the straight-through taking-up of tube 12 of Double-end
Hole making drill leads directly to tube 11 from the first single end head and protrudes into the aperture on the tube wall that Double-end leads directly to tube 12, to be passed through
The straight mouth reducing T of logical PVC.
In the above method, P1: pressure (gauge pressure, MPa) as defined in welding, P1=(0.15 ± 0.01) A/B, A indicate that first is single
End leads directly to the sectional area (mm of tube 112), B indicates the total effective area (mm of piston in the hydraulic cylinder of bonding machine2)；
P2: holding pressure when heat absorption, P2=0.5~0.8P1,
T1: forming the time (s) required for uniform weldering pearl, and the size of t1 is observed to form uniformly weldering pearl according to execute-in-place
Duration variation；
T2: absorbing heat time (s) required for welding, t2=tube wall thickness (mm) * 10；
T3: switch the time (s) of defined, 1≤t3≤13；
T4: time (s) of the adjustment pressure to P1 defined, 1≤t4≤18；
T5: cooling time (min), 10≤t5≤120.
Obviously, the above embodiment is merely an example for clearly illustrating the present invention, and is not to of the invention
The restriction of embodiment.For those of ordinary skill in the art, it can also be made on the basis of the above description
Its various forms of variation or variation.There is no necessity and possibility to exhaust all the enbodiments.And these belong to this hair
The obvious changes or variations that bright spirit is extended out are still in the protection scope of this invention.
Claims (8)
1. a kind of manufacturing method of the straight mouth reducing T of PVC, it is characterised in that: the straight mouth reducing T of PVC is
Two sections of pvc pipe shape objects hang down straight mouth made of welding, R mouthful or it is flat be flared the straight mouth reducing T of PVC, including 1 first single-ended
Straight-through tube (11), 1 Double-end lead directly to tube (12), flanging (2) and in-flanges, the first single end head straight pipe
Shape object (11) is that one end is straight mouth, and the other end is straight mouth, R mouthfuls or the flat pvc pipe shape object being flared；Double-end leads directly to tube (12)
It is the pvc pipe shape objects that both ends are all straight mouth, R mouthfuls or flat flaring；First single end head leads directly to tube (11) and Double-end straight pipe
Shape object (12) reducing；First single end head leads directly to tube (11) and leads directly to vertical in the middle part of the axial direction of tube (12) connect with Double-end
And be welded together, and the first single end head leads directly to tube (11) and Double-end leads directly to tube (12) perforation, first is single
End leads directly to tube (11) and Double-end leads directly to tube (12) and passes through the outer of the annular for being located at periphery due to welding formation
Flange (2) and the in-flanges of the annular positioned inside link together；
The manufacturing method of the straight mouth reducing T of PVC is:
1. according to product specification choose it is corresponding squeeze out or the pvc pipe shape object of injection molding, using multi-angle electric tube cutter by pvc pipe
The length that shape object is cut into requirement obtains the first single end head straight-through tube (11) and Double-end leads directly to tube (12)；Arc is used again
Shape saw handles to obtain according to the straight mouth end that the outer diameter that Double-end leads directly to tube (12) leads directly to tube (11) to the first single end head
The contact surface to be welded of arc surfaced；
2. 1. the first single end head that step obtains is led directly to tube (11) and Double-end leads directly to tube (12) and is placed in bonding machine
It on fixture and fixes, the first single end head leads directly to tube (11) and leads directly to vertical in the middle part of the axial direction of tube (12) set with Double-end
It sets；
3. end face is closed up, centering situation is checked, check that the first single end head leads directly to the end to be welded of the arc surfaced of tube (11)
Whether face is aligned with the contact surface to be welded at the axial middle part that Double-end leads directly to tube (12), such as otherwise utilizes the chucking power of fixture
It is adjusted；
4. bonding machine heating plate is placed between two contact surfaces to be welded, starting gradually to apply pressure P1 within the t1 time makes pipe end pressure
It heats on hot plate, wherein welding temperature: 200~250 DEG C；Pressure is gradually reduced to P2 after forming uniform weldering pearl and is protected
It holds and absorbs heat in P2, the heat absorption time is t2；
5. unclamping pipe end within the t3 time, heating plate is taken out, then close up pipe end；
6. then within the t4 time P1 is gradually forced into since 0, so that pipe welding position is uniformly turned over to being respectively formed from inside to outside
Side；
7. keeping pressure P1 within the t5 time, welding position is made to naturally cool to 60 DEG C or less；
8. passing through after the first single end head to link together is led directly to tube (11) and Double-end straight-through tube (12) taking-up
Hole making drill leads directly to tube (11) from the first single end head and protrudes into the aperture on the tube wall that Double-end leads directly to tube (12), to obtain
The straight mouth reducing T of the PVC that must be penetrated through；
Wherein, P1: pressure as defined in welding, unit MPa, P1=(0.15 ± 0.01) A/B, A indicate the first single end head straight pipe
The sectional area of shape object (11), B indicate the total effective area of piston in the hydraulic cylinder of bonding machine, and unit is square millimeter；
P2: holding pressure when heat absorption, P2=0.5~0.8P1,
T1: the time required for uniform weldering pearl is formed, unit is the second, and the size of t1 is observed to form uniform weldering according to execute-in-place
The duration of pearl changes；
T2: absorbing heat the time required for welding, and unit is the second, t2=tube wall thickness * 10, and tube wall thickness unit is millimeter；
T3: switching the time of defined, and unit is second, 1≤t3≤13；
T4: for adjustment pressure to the time of P1 defined, unit is second, 1≤t4≤18；
T5: cooling time, unit are minute, 10≤t5≤120.
2. the manufacturing method of the straight mouth reducing T of PVC according to claim 1, it is characterised in that: step 1. in, institute
State the pvc pipe shape object of extrusion molding the preparation method is as follows: being used to prepare the formula of the parts by weight of extrusion molding pvc pipe shape object such as
Under: 100 parts of polyvinyl chloride resin, 0.4~4.5 part of stabilizer, 0.4~1.0 part of oxidized polyethylene wax, 0~0.8 part of polyethylene wax, paraffin
0~1.0 part, 0~0.8 part of stearic acid, 0.1~0.5 part of calcium stearate, 0~3.0 part of acrylate, haloflex 0~5.0
Part, 0~4.0 part of MBS auxiliary agent, 1.0~15.0 parts of calcium carbonate, 0.2~3.0 part of titanium dioxide；
The preparation process of the extrusion molding pvc pipe shape object includes the following steps: to be used to prepare extrusion molding pvc pipe according to above-mentioned
The formula of the parts by weight of shape object weighs each raw and auxiliary material, puts into high-speed mixer and carries out hot mixing, when mixing temperature is to 120 DEG C
It is put into cold mixing machine, releases stand-by when cold mixing is to 60 DEG C, the material mixed addition twin-screw tube extrusion production line is squeezed
It forms out, tubing is cut into the length of requirement, if flared pipe fitting need to be made, be flared with pipe-expanding machine: flat mouth or R
Mouthful；Extrusion process temperature: 170~190 DEG C of 1st area of barrel, 160~180 DEG C of 2nd area of barrel, 150~170 DEG C of 3rd area of barrel, 4th area of barrel
140~160 DEG C, 140~160 DEG C of connector, 140~190 DEG C of mold, temperature is incremented by from connector to mouth mold, generally forms two
Head height, intermediate low Temperature Distribution.
3. the manufacturing method of the straight mouth reducing T of PVC according to claim 1, it is characterised in that: step 1. in, institute
State the pvc pipe shape object of injection molding the preparation method is as follows: being used to prepare the formula of the parts by weight of injection molding pvc pipe shape object such as
Under: 100 parts of polyvinyl chloride resin, 0.4~4.5 part of stabilizer, 0.2~0.5 part of oxidized polyethylene wax, 0~0.5 part of polyethylene wax, paraffin
0~0.6 part, 0~0.5 part of stearic acid, 0.5~2.0 part of calcium stearate, 0~3.0 part of acrylate, haloflex 0~5.0
Part, 0~4.0 part of MBS auxiliary agent, 1.0~15.0 parts of calcium carbonate, 0.2~3.0 part of titanium dioxide；
The preparation process of the injection molding pvc pipe shape object includes the following steps: to be used to prepare injection molding pvc pipe according to above-mentioned
The formula of the parts by weight of shape object weighs each raw and auxiliary material, puts into high-speed mixer and carries out hot mixing, when mixing temperature is to 120 DEG C
It is put into cold mixing machine, releases stand-by when cold mixing is to 60 DEG C, double screw extruder is added in the material mixed and is granulated, has been made
Particle puts into injection molding machine molding；It is granulated extrusion process temperature: 160~180 DEG C of 1st area of barrel, 150~170 DEG C of 2nd area of barrel, barrel 3
140~160 DEG C of area, 130~150 DEG C of 4th area of barrel, 130~150 DEG C of connector, 130~170 DEG C of mold, temperature from connector to
Mouth mold is incremented by, and generally forms two head heights, intermediate low Temperature Distribution；Injection molding temperature: 170~190 DEG C of nozzle, 1st area of barrel
165~185 DEG C, 160~180 DEG C of 2nd area of barrel, 160~175 DEG C of 3rd area of barrel, 160~170 DEG C of 4th area of barrel, injection temperature is from adding
Material section to nozzle gradually rises.
4. the manufacturing method of the straight mouth reducing T of PVC according to claim 1, it is characterised in that: step 4. in
Welding temperature is 230~250 DEG C.
5. a kind of manufacturing method of PVC straight pipe, it is characterised in that: the PVC straight pipe is that two sections of pvc pipe shape object welding are made
Straight mouth, R mouthfuls or flat flaring PVC straight pipe, including 2 the first single end heads lead directly to tube (11), flanging (2) and varus
Side (3), it is straight mouth that it is one end that the first single end head, which leads directly to tube (11), and the other end is straight mouth, R mouthfuls or the flat pvc pipe shape being flared
Object；2 the first single end heads lead directly to tube (11) level and are oppositely arranged and are welded together, and pass through what is formed due to welding
Flanging (2) positioned at the annular of periphery and the in-flanges (3) of the annular positioned inside link together；
The manufacturing method of the PVC straight pipe:
1. according to product specification choose it is corresponding squeeze out or the pvc pipe shape object of injection molding, using multi-angle electric tube cutter by pvc pipe
The first single end head that the length that shape object is cut into requirement obtains 2 unified specifications leads directly to tube (11)；
2. the first single end head of well cutting is led directly to tube (11) to be placed on welding machine clamp and fix, 2 first single-ended
The straight-through horizontal face setting of tube (11)；
3. the end face processing to be welded that 2 the first single end heads lead directly to the pipe end of tube (11) is met welding to flat and smooth
It is required that being suitable for coincideing: the contact surface to be welded of two pipe ends planishing to uniform to go out to consider to be worth doing with the planing tool on bonding machine；
4. end face is closed up, centering situation is checked, two contact surface misalignments to be welded are no more than the 10% of wall thickness, otherwise utilize fixture
Chucking power is adjusted and end face of planishing again；
5. bonding machine heating plate is placed between two pipe ends, starting gradually to apply pressure P1 within the t1 time makes pipe end be pressed in heating
It is heated on plate, wherein welding temperature: 200~250 DEG C；Pressure is gradually reduced to P2 after forming uniform weldering pearl and is maintained at P2
It absorbs heat, the heat absorption time is t2；
6. unclamping pipe end within the t3 time, heating plate is taken out, then close up pipe end；
7. then within the t4 time P1 is gradually forced into since 0, so that pipe welding position is uniformly turned over to being respectively formed from inside to outside
Side；
8. keeping pressure P1 within the t5 time, welding position is made to naturally cool to 60 DEG C or less；
Wherein, P1: pressure as defined in welding, unit MPa, P1=(0.15 ± 0.01) A/B, A indicate the section of pvc pipe shape object
Product, B indicate the total effective area of piston in the hydraulic cylinder of bonding machine, and unit is square millimeter；
P2: holding pressure when heat absorption, P2=0.5~0.8P1,
T1: the time required for uniform weldering pearl is formed, unit is the second, and the size of t1 is observed to form uniform weldering according to execute-in-place
The duration of pearl changes；
T2: absorbing heat the time required for welding, and unit is the second, t2=tube wall thickness * 10, and tube wall thickness unit is millimeter；
T3: switching the time of defined, and unit is second, 1≤t3≤13；
T4: for adjustment pressure to the time of P1 defined, unit is second, 1≤t4≤18；
T5: cooling time, unit are minute, 10≤t5≤120.
6. the manufacturing method of PVC straight pipe according to claim 5, it is characterised in that: step 1. in, the extrusion molding
Pvc pipe shape object the preparation method is as follows: the formula for being used to prepare the parts by weight of extrusion molding pvc pipe shape object is as follows: polyvinyl chloride resin
100 parts, 0.4~4.5 part of stabilizer, 0.4~1.0 part of oxidized polyethylene wax, 0~0.8 part of polyethylene wax, 0~1.0 part of paraffin,
0~0.8 part of stearic acid, 0.1~0.5 part of calcium stearate, 0~3.0 part of acrylate, 0~5.0 part of haloflex, MBS auxiliary agent
0~4.0 part, 1.0~15.0 parts of calcium carbonate, 0.2~3.0 part of titanium dioxide；
The preparation process of the extrusion molding pvc pipe shape object includes the following steps: to be used to prepare extrusion molding pvc pipe according to above-mentioned
The formula of the parts by weight of shape object weighs each raw and auxiliary material, puts into high-speed mixer and carries out hot mixing, when mixing temperature is to 120 DEG C
It is put into cold mixing machine, releases stand-by when cold mixing is to 60 DEG C, the material mixed addition twin-screw tube extrusion production line is squeezed
It forms out, tubing is cut into the length of requirement, if flared pipe fitting need to be made, be flared with pipe-expanding machine: flat mouth or R
Mouthful；Extrusion process temperature: 170~190 DEG C of 1st area of barrel, 160~180 DEG C of 2nd area of barrel, 150~170 DEG C of 3rd area of barrel, 4th area of barrel
140~160 DEG C, 140~160 DEG C of connector, 140~190 DEG C of mold, temperature is incremented by from connector to mouth mold, generally forms two
Head height, intermediate low Temperature Distribution.
7. the manufacturing method of PVC straight pipe according to claim 5, it is characterised in that: step 1. in, the injection molding
Pvc pipe shape object the preparation method is as follows: the formula for being used to prepare the parts by weight of injection molding pvc pipe shape object is as follows: polyvinyl chloride resin
100 parts, 0.4~4.5 part of stabilizer, 0.2~0.5 part of oxidized polyethylene wax, 0~0.5 part of polyethylene wax, 0~0.6 part of paraffin,
0~0.5 part of stearic acid, 0.5~2.0 part of calcium stearate, 0~3.0 part of acrylate, 0~5.0 part of haloflex, MBS auxiliary agent
0~4.0 part, 1.0~15.0 parts of calcium carbonate, 0.2~3.0 part of titanium dioxide；
The preparation process of the injection molding pvc pipe shape object includes the following steps: to be used to prepare injection molding pvc pipe according to above-mentioned
The formula of the parts by weight of shape object weighs each raw and auxiliary material, puts into high-speed mixer and carries out hot mixing, when mixing temperature is to 120 DEG C
It is put into cold mixing machine, releases stand-by when cold mixing is to 60 DEG C, double screw extruder is added in the material mixed and is granulated, has been made
Particle puts into injection molding machine molding；It is granulated extrusion process temperature: 160~180 DEG C of 1st area of barrel, 150~170 DEG C of 2nd area of barrel, barrel 3
140~160 DEG C of area, 130~150 DEG C of 4th area of barrel, 130~150 DEG C of connector, 130~170 DEG C of mold, temperature from connector to
Mouth mold is incremented by, and generally forms two head heights, intermediate low Temperature Distribution；Injection molding temperature: 170~190 DEG C of nozzle, 1st area of barrel
165~185 DEG C, 160~180 DEG C of 2nd area of barrel, 160~175 DEG C of 3rd area of barrel, 160~170 DEG C of 4th area of barrel, injection temperature is from adding
Material section to nozzle gradually rises.
8. the manufacturing method of PVC straight pipe according to claim 5, it is characterised in that: step 5. in welding temperature be
230~250 DEG C.
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| CN101112792A (en) * | 2007-08-08 | 2008-01-30 | 河北宝硕管材有限公司 | PVC-M pipe hot melting and connecting method |
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