CN111761839A - Composite rubber flange gasket production process and composite rubber flange gasket - Google Patents
Composite rubber flange gasket production process and composite rubber flange gasket Download PDFInfo
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- CN111761839A CN111761839A CN202010653875.7A CN202010653875A CN111761839A CN 111761839 A CN111761839 A CN 111761839A CN 202010653875 A CN202010653875 A CN 202010653875A CN 111761839 A CN111761839 A CN 111761839A
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- gasket
- composite rubber
- flange gasket
- rubber flange
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- 229920001971 elastomer Polymers 0.000 title claims abstract description 73
- 239000005060 rubber Substances 0.000 title claims abstract description 73
- 239000002131 composite material Substances 0.000 title claims abstract description 51
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 41
- 239000000463 material Substances 0.000 claims abstract description 41
- 239000004810 polytetrafluoroethylene Substances 0.000 claims abstract description 27
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims abstract description 27
- 238000004073 vulcanization Methods 0.000 claims abstract description 27
- 229920002943 EPDM rubber Polymers 0.000 claims abstract description 20
- 239000011248 coating agent Substances 0.000 claims abstract description 19
- 238000000576 coating method Methods 0.000 claims abstract description 19
- 238000007789 sealing Methods 0.000 claims abstract description 16
- 238000003825 pressing Methods 0.000 claims abstract description 14
- 238000012545 processing Methods 0.000 claims abstract description 9
- 238000005520 cutting process Methods 0.000 claims abstract description 7
- 238000013329 compounding Methods 0.000 claims abstract description 6
- 150000001875 compounds Chemical class 0.000 claims abstract description 5
- 239000012528 membrane Substances 0.000 claims description 21
- 239000000853 adhesive Substances 0.000 claims description 17
- 230000001070 adhesive effect Effects 0.000 claims description 17
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 15
- 229910052708 sodium Inorganic materials 0.000 claims description 15
- 239000011734 sodium Substances 0.000 claims description 15
- -1 polytetrafluoroethylene Polymers 0.000 claims description 9
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonium chloride Substances [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 claims description 8
- 235000011114 ammonium hydroxide Nutrition 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 8
- 239000003292 glue Substances 0.000 claims description 6
- KDFQYGBJUYYWDJ-UHFFFAOYSA-N azane;sodium Chemical compound N.[Na] KDFQYGBJUYYWDJ-UHFFFAOYSA-N 0.000 claims description 5
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 239000007888 film coating Substances 0.000 claims description 3
- 238000009501 film coating Methods 0.000 claims description 3
- 238000010008 shearing Methods 0.000 claims description 3
- 238000009966 trimming Methods 0.000 claims description 3
- KEAYESYHFKHZAL-UHFFFAOYSA-N Sodium Chemical group [Na] KEAYESYHFKHZAL-UHFFFAOYSA-N 0.000 claims description 2
- 210000002489 tectorial membrane Anatomy 0.000 abstract description 2
- 238000009417 prefabrication Methods 0.000 abstract 1
- 239000002253 acid Substances 0.000 description 7
- 239000003513 alkali Substances 0.000 description 6
- 239000002585 base Substances 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 239000010425 asbestos Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052895 riebeckite Inorganic materials 0.000 description 2
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- JCELWOGDGMAGGN-UHFFFAOYSA-N N=C=O.N=C=O.C1=CC=CC=C1C(C=1C=CC=CC=1)C1=CC=CC=C1 Chemical compound N=C=O.N=C=O.C1=CC=CC=C1C(C=1C=CC=CC=1)C1=CC=CC=C1 JCELWOGDGMAGGN-UHFFFAOYSA-N 0.000 description 1
- 239000004820 Pressure-sensitive adhesive Substances 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 239000011203 carbon fibre reinforced carbon Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 125000001153 fluoro group Chemical group F* 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000005056 polyisocyanate Substances 0.000 description 1
- 229920001228 polyisocyanate Polymers 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229920003051 synthetic elastomer Polymers 0.000 description 1
- 239000005061 synthetic rubber Substances 0.000 description 1
Classifications
-
- 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
- B29C69/00—Combinations of shaping techniques not provided for in a single one of main groups B29C39/00 - B29C67/00, e.g. associations of moulding and joining techniques; Apparatus therefore
-
- 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
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
-
- 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
- B29C63/00—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor
- B29C63/02—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor using sheet or web-like material
-
- 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
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
-
- 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
- B29C69/00—Combinations of shaping techniques not provided for in a single one of main groups B29C39/00 - B29C67/00, e.g. associations of moulding and joining techniques; Apparatus therefore
- B29C69/001—Combinations of shaping techniques not provided for in a single one of main groups B29C39/00 - B29C67/00, e.g. associations of moulding and joining techniques; Apparatus therefore a shaping technique combined with cutting, e.g. in parts or slices combined with rearranging and joining the cut parts
-
- 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
- B29C69/00—Combinations of shaping techniques not provided for in a single one of main groups B29C39/00 - B29C67/00, e.g. associations of moulding and joining techniques; Apparatus therefore
- B29C69/007—Lining or sheathing in combination with forming the article to be lined
-
- 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
- F16L23/00—Flanged joints
- F16L23/16—Flanged joints characterised by the sealing means
- F16L23/18—Flanged joints characterised by the sealing means the sealing means being rings
- F16L23/22—Flanged joints characterised by the sealing means the sealing means being rings made exclusively of a material other than metal
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Thermal Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Gasket Seals (AREA)
Abstract
The invention discloses a composite rubber flange gasket production process and a composite rubber flange gasket, wherein the composite rubber flange gasket comprises a gasket main body and a coating film compounded on the gasket main body, the production process comprises the steps of die processing, coating film cutting, coating film treatment, gasket prefabrication, material compounding, vulcanization pressing, parting demolding and the like, the tolerance and the elastic application range of a gasket product to a medium are improved, and the cost of the flange gasket is reduced. Wherein, compound the PTFE tectorial membrane in EPDM gasket main part, solved the harder problem of PTFE material, avoid EPDM material and medium contact simultaneously, widen its tolerance to the medium. And meanwhile, the added sealing line enables the gasket to have good sealing performance between the two flanges, and double-layer materials provide double insurance for flange face sealing. And the production cost of the composite rubber flange gasket made of PTFE and EPDM is reduced by 50 percent compared with the products made of FPM and PTFE materials, and the composite rubber flange gasket has good economic value and application prospect.
Description
Technical Field
The invention relates to a production process of a composite rubber flange gasket and the composite rubber flange gasket.
Background
The flange gasket (conforming to HG/T20606-2009 standard) is an important part for sealing the flange face of the steel pipe. Generally, the flange gasket is made of a single material, and includes: synthetic rubber, asbestos rubber, non-asbestos rubber, polytetrafluoroethylene and the like, and different materials are adopted according to different pipeline circulating media. Taking the medium in the pipeline as an acid-base liquid as an example, the commonly adopted flange gasket is Ethylene Propylene Diene Monomer (EPDM), fluorine rubber (FPM) or Polytetrafluoroethylene (PTFE). However, gaskets made from a single material either have poor resistance to the media, are costly, or have too high a hardness to have a compression set. For example, in the actual use process, the EPDM flange gasket can only withstand weak acid and alkali, and has poor tolerance to media; the FPM flange gasket can resist stronger acid and alkali, but the manufacturing cost is higher; PTFE is able to withstand stronger acids and bases, but is harder, has no amount of compressive deformation, and is not conducive to use in some special situations. Although some gaskets made of composite materials are available on the market, the two materials of the gaskets are simply matched, and the gaskets are easy to damage when not used properly, so that liquid in the pipeline is leaked.
Disclosure of Invention
In order to overcome various problems of flange gaskets made of different materials in the using process, the invention provides a production process of a composite rubber flange gasket and the flange gasket, which effectively solve the problem of the tolerance performance of the gasket to a medium and simultaneously reduce the production cost. The specific technical scheme is as follows:
the invention provides a production process of a composite rubber flange gasket, which comprises a gasket main body and a coating film compounded on the gasket main body, and the production process comprises the following steps:
1) processing a die: processing a flange gasket production die according to HG/T20606-2009 standard, and adding a plurality of sealing wire grooves at the contact surface of the flange for later use;
2) film covering and cutting: cutting a rubber material for manufacturing a coating into a membrane with a designed thickness by lathe processing;
3) film coating treatment: performing sodium treatment on the membrane cut in the step 2), and coating an adhesive on one surface of the membrane after the membrane is dried;
4) prefabricating a gasket: mixing the rubber material for manufacturing the gasket main body, and discharging the rubber material according to the required thickness to obtain a rubber sheet for manufacturing the gasket main body, and then shearing the rubber sheet into a preformed gasket main body according to the standard HG/T20606-2009;
5) compounding materials: coating the diaphragm coated with the adhesive in the step 3) on the inner hole of the preformed gasket main body in the step 4), and turning outwards and adhering the diaphragm to the periphery of the inner hole of the gasket main body to compound the diaphragm and the inner hole together to form a preformed composite rubber flange gasket;
6) vulcanization and pressing: placing the composite rubber flange gasket preformed in the step 5) into the mold cavity processed in the step 1), then placing the composite rubber flange gasket into a vacuum vulcanizing machine for vulcanization pressing, and attaching a film to the gasket main body;
7) parting and demolding: and (3) taking the vulcanized and pressed composite rubber flange gasket obtained in the step 6) out of a vacuum vulcanizing machine, parting, demolding and trimming to obtain the target product composite rubber flange gasket.
As a preferable technical scheme, in the step 1), the sealing wire grooves are arranged in two ways, are designed in an annular manner and are distributed around the inner hole of the flange gasket.
Preferably, in step 2), the rubber material for forming the coating is a polytetrafluoroethylene bar material, and the polytetrafluoroethylene bar material is cut into a membrane by a lathe.
Further preferably, the membrane has a thickness of 0.2 mm.
In a preferable technical scheme, in the step 3), a sodium treatment agent used in the sodium treatment is a sodium ammonia solution prepared by adding metal sodium into a liquid ammonia solution to obtain a sodium ammonia solution with a mass fraction of 1-5%; the adhesive is glue of Liekina.
Further preferably, the time for the sodium treatment is 1.5-3 h; the adhesive is coated twice, each time of coating is aired at room temperature for 30min, namely the adhesive is coated for the first time, aired at room temperature for 30min, then coated for the second time, aired for 30min and then compounded.
As a preferable technical solution, in the step 4), the rubber material for manufacturing the gasket main body is ethylene propylene diene monomer.
In a preferable technical scheme, in the step 5), the diaphragm is adhered to the periphery of the inner hole of the gasket main body, the width of the diaphragm is 1/3-1/2 of the width of the gasket main body, and the diaphragm covers the sealing line groove.
As a preferable technical solution, in step 6), the process conditions of the vulcanization pressing are as follows: the vulcanization temperature is 145-165 ℃, the vulcanization time is 450-540 s, and the vulcanization pressure is 40-60 Mpa; the vulcanization pressing also comprises two times of vacuumizing, and the duration of each time of vacuumizing is 20 s.
In addition, the invention also provides a composite rubber flange gasket which is manufactured according to the production process of the composite rubber flange gasket.
The invention has the beneficial effects that:
according to the production process of the composite rubber gasket, the PTFE film is compounded on the EPDM gasket main body, the PTFE is directly contacted with the medium, the tolerance performance of the composite rubber gasket to the medium is good, and the problem that the EPDM flange gasket cannot tolerate strong acid and strong alkali is solved; the EPDM material has good elasticity and deformability, so that the problem that the PTFE material is hard is solved; the thickness of the PTFE film is only 0.2mm, the PTFE film is perfectly bonded and fused with the EPDM material through a vulcanization pressing process, namely, the compounded product has good elasticity and good tolerance to a medium, and is assisted with two added sealing lines, so that the gasket has good sealing performance between two flanges, the EPDM material also has certain acid-base tolerance, and double insurance is undoubtedly realized when the flange surfaces are sealed. In addition, the cost of the composite rubber flange gasket of the target product is reduced by 50 percent compared with the products made of FPM and PTFE materials, and the composite rubber flange gasket has good economic value and application prospect.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the embodiments.
Example 1
The embodiment is a composite rubber flange gasket, which comprises a gasket main body and a coating film compounded on the gasket main body, wherein the specific production process comprises the following steps:
1) processing a die: according to the HG/T20606-2009 standard, a flange gasket production die is processed, and two sealing wire grooves are added at the contact surface of the flange for standby. In this embodiment, the sealing wire grooves are two, and are designed in an annular direction and distributed around the inner hole of the flange gasket.
2) Film covering and cutting: and (3) cutting the rubber material for manufacturing the coating into a membrane with a designed thickness by lathe processing. In this embodiment, the rubber material used to make the coating is Polytetrafluoroethylene (PTFE) bar, which is cut into membranes by a lathe, the membranes preferably having a thickness of 0.2 mm.
3) Film coating treatment: performing sodium treatment on the membrane cut in the step 2), and coating an adhesive on one surface of the membrane after the membrane is dried. Because carbon-carbon bonds in the molecules of the polytetrafluoroethylene are tightly surrounded by fluorine atoms of the outer layer, the polytetrafluoroethylene has high stability and non-adhesiveness, and the products cannot be bonded in a large area and with high strength by adopting a common pressure-sensitive adhesive. The polarity and surface tension of the surface can be increased by sodium treatment, so that the surface of the material can be activated and can be bonded with metal, nonmetal and other plastics. In the sodium treatment of this embodiment, the sodium treatment agent is sodium metal, which is added into the liquid ammonia solution to prepare a 1% -5% sodium ammonia solution, preferably 2% -4%, and more preferably 3%; the mass fraction of the sodium ammonia solution used in the embodiment is 3%; the time of sodium treatment is 2 h; in other embodiments, the time for sodium treatment can be shortened or prolonged as appropriate, but is generally not less than 1.5 hours and not more than 3 hours; preferably 2 to 2.5 hours.
In the implementation, the glue of the Likekan is adopted as the adhesive and is smeared twice, after each time of gumming, the glue is aired at room temperature for 30min, namely, after the first smearing, the glue is aired at room temperature for 30min, then the second smearing is carried out, and after the glue is aired for 30min, the compounding is carried out. The Likenna adhesive is also named as JQ-1 adhesive, triphenylmethane diisocyanate adhesive and polyisocyanate adhesive, has good bonding effect, and is beneficial to bonding a film and a gasket main body.
4) Prefabricating a gasket: and mixing the rubber material for manufacturing the gasket main body, and extruding according to the required thickness to obtain a rubber sheet for manufacturing the gasket main body, and then shearing into a preformed gasket main body according to the standard HG/T20606-2009. In this embodiment, the rubber material for manufacturing the gasket main body is Ethylene Propylene Diene Monomer (EPDM).
5) Compounding materials: and (3) coating the membrane coated with the adhesive in the step 3) on the inner hole of the preformed gasket main body in the step 4), and turning outwards and adhering the membrane to the periphery of the inner hole of the gasket main body to compound the membrane and the inner hole together to form the preformed composite rubber flange gasket. Preferably, the width of the diaphragm adhered to the periphery of the inner hole of the gasket main body is 1/3-1/2 of the width of the gasket main body, in the embodiment, the width of the diaphragm is 1/2 of the width of the gasket main body, and the diaphragm covers the sealing line slot.
6) Vulcanization and pressing: and (3) placing the preformed composite rubber flange gasket in the step 5) into the mold cavity processed in the step 1), then placing the mold cavity into a vacuum vulcanizing machine for vulcanization pressing, and attaching the film to the gasket main body. The process conditions of the vulcanization pressing are as follows: the vulcanization temperature is 145-165 ℃, the vulcanization time is 450-540 s, and the vulcanization pressure is 40-60 Mpa; in this example, the vulcanization temperature was 155 ℃, the vulcanization time was 490s, and the vulcanization pressure was 56 MPa. In addition, this embodiment the vulcanization is pressed and is still included twice evacuation, and the vacuum duration of each time is 20s, makes to laminate between tectorial membrane and the gasket main part inseparabler.
7) Parting and demolding: taking out the vulcanized and pressed composite rubber flange gasket obtained in the step 6) from a vacuum vulcanizing machine, parting and demolding, and trimming and deburring to obtain the target product composite rubber flange gasket.
Example 2 Effect example
In this embodiment, the performance of the composite rubber flange gasket produced in embodiment 1 is tested, and meanwhile, the performance of the flange gasket made of a single material is compared, and the experimental method includes: the transverse tensile strength test is carried out according to GBT528-2009, the compressive strength is carried out according to GB-T7759-1996, the heat distortion temperature is carried out according to GB-T3512-2001, and the alkali resistance and the acid resistance are both carried out according to GBT1690-2010, wherein the alkali resistance is that the test piece is treated by 5% sodium hydroxide for 1 month, and the appearance is observed; the acid resistance is that the test piece is treated by 5 percent sulfuric acid for 1 month, and the appearance is observed; the results are shown in table 1:
TABLE 1 conditions of performance test results for flange gaskets
As can be seen from the table, the composite rubber flange gasket produced by the process has good tolerance performance to a medium by compounding the PTFE film on the EPDM gasket main body and directly contacting the PTFE with the medium, thereby solving the problem that the EPDM flange gasket cannot tolerate strong acid and strong alkali; the EPDM material has good elasticity and deformability, so that the problem that the PTFE material is hard is solved; and PTFE bonds with EPDM material perfectly through the vulcanization pressing process and fuses together, namely the compounded product not only has good elasticity and good tolerance to the medium, but also enables the gasket to have good sealing performance between two flanges, and the EPDM material has certain acid-base tolerance, and is undoubtedly double insurance when the flange faces are sealed. In addition, the cost of the composite rubber flange gasket is reduced by 50 percent compared with the products made of FPM and PTFE materials, and the composite rubber flange gasket has good economic value and application prospect.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive. Furthermore, it should be understood that although the present specification describes embodiments, this does not include only one embodiment, and such description is for clarity only, and those skilled in the art should be able to make the specification as a whole, and the embodiments may be appropriately combined to form other embodiments understood by those skilled in the art.
Claims (10)
1. A production process of a composite rubber flange gasket is characterized by comprising the following steps: the composite rubber flange gasket comprises a gasket main body and a coating film compounded on the gasket main body, and the production process comprises the following steps:
1) processing a die: processing a flange gasket production die according to relevant standards, and adding a plurality of sealing wire grooves at the contact surface of the flange gasket for later use;
2) film covering and cutting: cutting a rubber material for manufacturing a coating into a membrane with a designed thickness by lathe processing;
3) film coating treatment: performing sodium treatment on the membrane cut in the step 2), and coating an adhesive on one surface of the membrane after the membrane is dried;
4) prefabricating a gasket: mixing the rubber material for manufacturing the gasket main body, taking out the rubber material according to the required thickness to obtain a rubber sheet for manufacturing the gasket main body, and then shearing the rubber sheet into a preformed gasket main body according to the relevant standard;
5) compounding materials: coating the diaphragm coated with the adhesive in the step 3) on the inner hole of the preformed gasket main body in the step 4), and turning outwards and adhering the diaphragm to the periphery of the inner hole of the gasket main body to compound the diaphragm and the inner hole together to form a preformed composite rubber flange gasket;
6) vulcanization and pressing: placing the composite rubber flange gasket preformed in the step 5) into the mold cavity processed in the step 1), then placing the composite rubber flange gasket into a vacuum vulcanizing machine for vulcanization pressing, and attaching a film to the gasket main body;
7) parting and demolding: and (3) taking the vulcanized and pressed composite rubber flange gasket obtained in the step 6) out of a vacuum vulcanizing machine, parting, demolding and trimming to obtain the target product composite rubber flange gasket.
2. The production process of the composite rubber flange gasket according to claim 1, characterized in that: in the step 1), the sealing wire grooves are arranged in two ways, are designed in an annular mode and are distributed around the inner hole of the flange gasket.
3. The production process of the composite rubber flange gasket according to claim 1, characterized in that: in the step 2), the rubber material for manufacturing the coating is a polytetrafluoroethylene bar, and the polytetrafluoroethylene bar is cut into a membrane by a lathe.
4. A production process of a composite rubber flange gasket according to claim 3, characterized in that: the thickness of the membrane is 0.2 mm.
5. The production process of the composite rubber flange gasket according to claim 1, characterized in that: in the step 3), the sodium treatment agent used in the sodium treatment is sodium metal which is added into a liquid ammonia solution to prepare a sodium ammonia solution with the mass fraction of 1-5%; the adhesive is glue of Liekina.
6. A production process of a composite rubber flange gasket according to claim 5, characterized in that: the sodium treatment time is 1.5-3 h; the adhesive is coated twice, and the adhesive is aired at room temperature for 30min after being coated twice.
7. The production process of the composite rubber flange gasket according to claim 1, characterized in that: in the step 4), the rubber material for manufacturing the gasket main body is ethylene propylene diene monomer.
8. The production process of the composite rubber flange gasket according to claim 1, characterized in that: in the step 5), the width of the diaphragm adhered to the periphery of the inner hole of the gasket main body is 1/3-1/2 of the width of the gasket main body, and the diaphragm covers the sealing wire groove.
9. The production process of the composite rubber flange gasket according to claim 1, characterized in that: in the step 6), the vulcanization pressing process conditions are as follows: the vulcanization temperature is 145-165 ℃, the vulcanization time is 450-540 s, and the vulcanization pressure is 40-60 Mpa; the vulcanization pressing also comprises two times of vacuumizing, and the duration of each time of vacuumizing is 20 s.
10. The utility model provides a compound rubber flange gasket which characterized in that: the composite rubber flange gasket is manufactured by the production process of the composite rubber flange gasket according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010653875.7A CN111761839A (en) | 2020-07-08 | 2020-07-08 | Composite rubber flange gasket production process and composite rubber flange gasket |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010653875.7A CN111761839A (en) | 2020-07-08 | 2020-07-08 | Composite rubber flange gasket production process and composite rubber flange gasket |
Publications (1)
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112976621A (en) * | 2021-03-15 | 2021-06-18 | 日照市恒通水处理设备有限公司 | Processing technology of PTFE composite membrane |
| CN113733701A (en) * | 2021-09-09 | 2021-12-03 | 浙江贝格霍尔自控工程有限公司 | Micro-pressure automatic valve pressure sensing diaphragm and preparation method thereof |
| CN113910515A (en) * | 2021-10-29 | 2022-01-11 | 西安微电子技术研究所 | Device and method for reinforcing radiating gasket inside power module |
| CN115873353A (en) * | 2023-01-17 | 2023-03-31 | 东莞市思齐橡胶技术有限公司 | A kind of EPDM+PTFE composite seal material and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1651228A (en) * | 2004-01-16 | 2005-08-10 | 弗罗伊登贝格-诺克普通合伙公司 | Fluorocarbon Elastomer Dynamically Vulcanized Rubber Bonding |
| CN101011865A (en) * | 2006-09-05 | 2007-08-08 | 浙江国泰密封材料股份有限公司 | Manufacturing process of polytetrafluoroethylene composite elastic body shim and product thereof |
| CN105111613A (en) * | 2015-08-24 | 2015-12-02 | 浙江灵通道路设施股份有限公司 | PVC wiring duct and production device and technology thereof |
| CN105419183A (en) * | 2015-11-30 | 2016-03-23 | 安徽锦洋氟化学有限公司 | Modified tetrafluoroethylene-propylene fluororubber flange gasket |
-
2020
- 2020-07-08 CN CN202010653875.7A patent/CN111761839A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1651228A (en) * | 2004-01-16 | 2005-08-10 | 弗罗伊登贝格-诺克普通合伙公司 | Fluorocarbon Elastomer Dynamically Vulcanized Rubber Bonding |
| CN101011865A (en) * | 2006-09-05 | 2007-08-08 | 浙江国泰密封材料股份有限公司 | Manufacturing process of polytetrafluoroethylene composite elastic body shim and product thereof |
| CN105111613A (en) * | 2015-08-24 | 2015-12-02 | 浙江灵通道路设施股份有限公司 | PVC wiring duct and production device and technology thereof |
| CN105419183A (en) * | 2015-11-30 | 2016-03-23 | 安徽锦洋氟化学有限公司 | Modified tetrafluoroethylene-propylene fluororubber flange gasket |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112976621A (en) * | 2021-03-15 | 2021-06-18 | 日照市恒通水处理设备有限公司 | Processing technology of PTFE composite membrane |
| CN113733701A (en) * | 2021-09-09 | 2021-12-03 | 浙江贝格霍尔自控工程有限公司 | Micro-pressure automatic valve pressure sensing diaphragm and preparation method thereof |
| CN113910515A (en) * | 2021-10-29 | 2022-01-11 | 西安微电子技术研究所 | Device and method for reinforcing radiating gasket inside power module |
| CN113910515B (en) * | 2021-10-29 | 2024-04-26 | 西安微电子技术研究所 | Device and method for reinforcing heat dissipation gasket in power module |
| CN115873353A (en) * | 2023-01-17 | 2023-03-31 | 东莞市思齐橡胶技术有限公司 | A kind of EPDM+PTFE composite seal material and preparation method thereof |
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