CN102602010A - RTM (resin transfer molding) one-way injection molding device for square thin-walled plate parts and method - Google Patents
RTM (resin transfer molding) one-way injection molding device for square thin-walled plate parts and method Download PDFInfo
- Publication number
- CN102602010A CN102602010A CN2012100643261A CN201210064326A CN102602010A CN 102602010 A CN102602010 A CN 102602010A CN 2012100643261 A CN2012100643261 A CN 2012100643261A CN 201210064326 A CN201210064326 A CN 201210064326A CN 102602010 A CN102602010 A CN 102602010A
- Authority
- CN
- China
- Prior art keywords
- formpiston
- former
- hole
- demoulding
- preform
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000011347 resin Substances 0.000 title claims abstract description 46
- 229920005989 resin Polymers 0.000 title claims abstract description 46
- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000001746 injection moulding Methods 0.000 title claims abstract description 14
- 238000001721 transfer moulding Methods 0.000 title 1
- 238000002347 injection Methods 0.000 claims abstract description 24
- 239000007924 injection Substances 0.000 claims abstract description 24
- 230000003139 buffering effect Effects 0.000 claims description 26
- 239000011148 porous material Substances 0.000 claims description 10
- 238000000465 moulding Methods 0.000 claims description 8
- 230000000630 rising effect Effects 0.000 claims description 7
- 238000007789 sealing Methods 0.000 claims description 6
- 238000007711 solidification Methods 0.000 claims description 5
- 230000008023 solidification Effects 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 4
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- -1 heating Polymers 0.000 claims description 2
- 238000001816 cooling Methods 0.000 abstract 1
- 238000009745 resin transfer moulding Methods 0.000 description 16
- 239000000835 fiber Substances 0.000 description 7
- 230000002787 reinforcement Effects 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 230000035699 permeability Effects 0.000 description 3
- 239000011521 glass Substances 0.000 description 2
- 239000012779 reinforcing material Substances 0.000 description 2
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 description 1
- 229920005372 Plexiglas® Polymers 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Landscapes
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
本发明提出了一种用于方形薄壁平板件RTM单向注射成形的装置及方法，所述装置包括阴模和阳模；阴模和阳模均为方形平板结构，阴模中部位置有方形模腔，用于放置方形预成型体，阳模开有缓冲流道，缓冲流道上开有注口、冒口和脱模孔；注射时，预成型体与平行于树脂流动方向的模腔两侧内壁紧贴，注入树脂并冷却后，采用分模螺柱将阳模和阴模分离，采用脱模螺柱将成型板件从阳模分离，最后对成型板件进行切割，得到无表面损伤的方形薄壁平板件。本发明采用直线型的缓冲流道，可以分散、平均注口的注射压力，试验表明，采用本发明能够实现在注口处的注射压力下，树脂流动前沿呈直线向冒口方向前进，实现了方形薄壁平板件的RTM单向注射。
The present invention proposes a device and method for RTM one-way injection molding of square thin-walled flat parts. The device includes a female mold and a male mold; The mold cavity is used to place the square preform. The male mold has a buffer flow channel, and the buffer flow channel is provided with a sprue, a riser and a demoulding hole; when injecting, the preform and the cavity parallel to the resin flow direction The inner wall of the side is closely attached, after injecting resin and cooling, the male mold and the female mold are separated by a parting stud, and the forming panel is separated from the male mold by a demoulding stud, and finally the forming panel is cut to obtain no surface damage square thin-walled flat pieces. The present invention adopts a linear buffer flow channel, which can disperse and average the injection pressure of the nozzle. The test shows that under the injection pressure at the nozzle, the resin flow front advances in a straight line to the riser direction by adopting the present invention. RTM one-way injection of square thin-walled flat parts.
Description
Technical field
The present invention relates to resin transfer moulding (RTM) forming technique field, be specially a kind of device and method that is used for the unidirectional injection moulding of square thin-walled flat part RTM.
Background technology
Resin transfer moulding (RTM) technology is a kind of mold closing technology; Be under certain pressure, low viscous resin injection to be preset in the mold cavity of reinforcing material; The reinforcing material prefabricated component is soaked into fully, then through heating or the mode of constant temperature is carried out resin solidification, thus the technology of preparation material.The RTM product possesses high strength, the high-modulus of fibre reinforcement simultaneously, possesses extensibility, the compression ratio of resin again, so comprehensive mechanical performance is high, is widely used in Aero-Space, naval vessel manufacturing, every field such as automobile industry.
The unidirectional injection moulding of RTM is one of most widely used RTM injection system.Producing, unidirectional injection is mainly used in the moulding of thin-wall part; In scientific research, unidirectional injection is the effective means of research resin flows characteristic, fibre reinforcement attribute.
The RTM one-way flow is injection molding to liking square thin-walled flat part; Inject after fibre reinforcement is full of the entire die die cavity; The mould geat is arranged on the high order end or the low order end of any axis of die cavity; Correspondingly, the mould rising head is arranged on the low order end or the high order end of any axis of die cavity.During injection the injector discharge nozzle is inserted the mould geat and inject, treat that resin stops injection and extracts the injector discharge nozzle when rising head flows out.After treating the interior resin solidification of mould,, then through some means plate is taken out from die cavity again through the branch mould of certain way with former and former.
The unidirectional injection molding of RTM that just present document is announced, ubiquitous problem and reason are:
(1) owing to adopt the some injection, the flow front of resin in mould can not keep the flat fortune of straight line, advances to the rising head position but be circular arc, therefore can't realize real unidirectional injection.Aborning, flow front is under the situation of camber line, and when resin flow during through mould corner, gas agree to be wrapped in the die cavity corner, causes product to produce bubble, dry spot defective.In scientific research; One-way flow is generally used for studying the permeability of fiber preform; Flow front is that camber line shows that resin each each several part in fibre reinforcement flows inconsistent; Therefore measured fibre reinforcement permeability receives geat rising head position effects, can not represent the actual value of fibre reinforcement permeability.
(2) for fear of ejecting mechanism damage plate surface, at present, unidirectional RTM moulding injection molding is not designed with ejecting mechanism, causes the gained plate to stick to usually and is difficult in the die cavity take out.The at present general means that adopt are, after former and formpiston divide mould, with the plastics scoop plate and former are separated, and the working strength of this technology is big, efficient is low, and can not guarantee the plate surface not damaged.
Summary of the invention
The technical problem that solves
For solving the problem that prior art exists, realize the one-way flow of RTM injection process and the simple and easy demoulding of product thereof, the present invention is directed to square thin-walled plate, a kind of device and method that is used for the unidirectional injection moulding of square thin-walled flat part RTM has been proposed.
Technical scheme
Technical scheme of the present invention is:
Said a kind of device that is used for the unidirectional injection moulding of square thin-walled flat part RTM is characterized in that: comprise former and formpiston; Former and formpiston are the square plate structure;
The former medium position has square die cavity; Be used to place square preform; Wherein preform is close to the die cavity both sides inwall that is parallel to the resin flows direction, preform and the clearance channel that has same widths perpendicular to the die cavity both sides inwall of resin flows direction; Have a circle seal groove at the die cavity outward flange; The former corner location has connecting hole, is used for injection process and is fastenedly connected through clamping screw and formpiston; On former, also have a pair of pin locating hole, be used for the location of former and formpiston;
The corresponding position of formpiston and preform is the plane; Formpiston and the corresponding position of two interspace passages have straight line type buffering runner; The buffering runner is perpendicular to the resin flows direction, and the buffering flow channel length equals clearance channel length, and the buffering width of flow path is less than the clearance channel width; Article two, the center of buffering runner has vertical through hole, and a vertical through hole is as the geat hole, and another vertical through hole is as emitting oral pore; In the buffering runner, also have a plurality of demoulding screwed holes, demoulding screwed hole is in the both sides in geat hole and the both sides that emit oral pore; On formpiston, also have a pair of pin locating hole, and corresponding with a pair of pin locating hole on the former; Have branch mould screwed hole at the formpiston corner location, divide mould screwed hole position corresponding, and divide mould screwed hole internal diameter greater than the connecting hole internal diameter with the connecting hole position of four jiaos of formers.
Said a kind of method that is used for the unidirectional injection moulding of square thin-walled flat part RTM may further comprise the steps:
Step 1: coating release agent on cavity space and male mold surfaces; Preform is put into cavity space, and preform and the die cavity both sides inwall that is parallel to the resin flows direction are close to, preform and the clearance channel that has same widths perpendicular to the die cavity both sides inwall of resin flows direction; Sealing joint strip is filled in the die cavity seal groove on every side;
Step 2: formpiston and former are fitted, and formpiston and former are located through shop bolt; At the Si Jiaochu of formpiston and former, formpiston and former are fixedly clamped through clamping screw; Be screwed in the demoulding screwed hole from the outside with demoulding double-screw bolt, demoulding double-screw bolt is filled demoulding screwed hole full and demoulding stud end does not stretch into the buffering runner;
Step 3: after mixed with resin, heating, resin is injected from the geat hole through injector, when resin when the rising head orifice flow goes out, stop injection;
Step 4: after treating resin solidification, remove the clamping screw of shop bolt and four jiaos; In the branch mould screwed hole of formpiston, be screwed into branch mould double-screw bolt, formpiston is separated with former; Demoulding double-screw bolt is continued to be screwed in the demoulding screwed hole, the moulding plate is separated from formpiston;
Step 5: the moulding plate after the demoulding is cut according to the position at preform place, and excision cushions the resin mass that runner forms, and obtains not having the square thin-walled flat part of surface damage.
Beneficial effect
The present invention adopts linear buffering runner; Can disperse, the injection pressure of average geat, test shows, adopts the present invention can be implemented under the injection pressure at geat place; Linearly advancing to the rising head direction in the resin flows forward position, has realized the unidirectional injection of RTM of square thin-walled flat part.Because the existence of resin flow channel is arranged, can guarantee that plate stays on the formpiston when formpiston separates with former, can not stay in the die cavity of former, thereby reduce the risk and the difficulty of the demoulding greatly.Designed stripper apparatus in buffering runner position, can quickly and easily plate have been broken away from from former, the more important thing is that this method can not damage plate surface.
Description of drawings
Fig. 1: the vertical view of apparatus of the present invention;
Fig. 2: the A-A cutaway view of apparatus of the present invention;
Fig. 3: the vertical view of formpiston;
Fig. 4: the B-B cutaway view of formpiston;
Fig. 5: the vertical view of former;
Fig. 6: the C-C cutaway view of former;
Wherein: 1, pad; 2, locking double-screw bolt; 3, sealing joint strip; 4, locking nut; 5, demoulding double-screw bolt; 6, formpiston; 7, preform; 8, former; 9, shop bolt; 10, divide the mould screwed hole; 11, demoulding screwed hole; 12, geat hole; 13, formpiston pin hole; 14, buffering runner; 15, emit oral pore; 16, connecting hole; 17, former pin hole; 18, die cavity; 19, seal groove.
The specific embodiment
Below in conjunction with specific embodiment the present invention is described:
Embodiment:
Present embodiment is that square shaped thin-walled flat part is carried out the unidirectional injection moulding of RTM, adopts device to comprise former 8 and formpiston 6, and former and formpiston are the square plate structure.Mold materials is transparent plexiglass plate or other non-metal board, metallic plate, when mold materials adopts transparent organic glass, can be used to observe the real motion situation of flow front in mould.In the present embodiment, the material of former and formpiston is a transparent organic glass.
With reference to accompanying drawing 5 and accompanying drawing 6; The former medium position has square die cavity 18; Be used to place square preform 7; Wherein preform is close to the die cavity both sides inwall that is parallel to the resin flows direction, has the clearance channel of same widths between preform and the die cavity both sides inwall perpendicular to the resin flows direction.Have a circle seal groove 19 at the die cavity outward flange, be used to place sealing joint strip 3, the seal groove degree of depth is less than the thickness of used sealing joint strip.The former corner location has connecting hole 16, is used for injection process and is fastenedly connected with formpiston through locking double-screw bolt 2, pad 1 and locking nut 4.On former, also have a pair of former pin locating hole 17, be used for the location of former and formpiston.
With reference to accompanying drawing 3 and accompanying drawing 4; The corresponding position of formpiston and preform is the plane; Formpiston and the corresponding position of two interspace passages have straight line type buffering runner 14, and the buffering runner is perpendicular to the resin flows direction, and the buffering flow channel length equals clearance channel length; The buffering width of flow path is less than the clearance channel width, and the buffering flow channel depth is less than formpiston thickness.Article two, the center of buffering runner has vertical through hole; A vertical through hole is as geat hole 12; Another vertical through hole is as emitting oral pore 15; The geat hole with emit the nominal diameter of oral pore to be no more than the buffering width of flow path, the geat hole is used to connect injector discharging opening pipeline, emits oral pore to be used to connect the tank body and the pipeline of waste collection.Also have four demoulding screwed holes 11 in buffering in the runner, demoulding screwed hole is in the both sides in geat hole and the both sides that emit oral pore, and when injection, demoulding screwed hole is screwed on through demoulding double-screw bolt 5, prevents that resin from emerging from demoulding screwed hole.On formpiston, have a pair of formpiston pin locating hole 13, and corresponding with a pair of pin locating hole on the former.Have branch mould screwed hole 10 at the formpiston corner location, divide mould screwed hole position corresponding, and divide mould screwed hole internal diameter greater than the connecting hole internal diameter with the connecting hole position of four jiaos of formers; In injection process, divide the mould screwed hole to cooperate with connecting hole, realize being fastenedly connected of former and formpiston; In knockout course; Adopt and the branch mould double-screw bolt that divides the mould screwed hole to cooperate, former and formpiston are backed down, realize the branch mould of former and formpiston.
Concrete method step is:
Step 1: coating release agent on cavity space 18 and male mold surfaces; Preform is put into cavity space, and preform and the die cavity both sides inwall that is parallel to the resin flows direction are close to, preform and the clearance channel that has same widths perpendicular to the die cavity both sides inwall of resin flows direction; Sealing joint strip 3 is filled in the die cavity seal groove 19 on every side;
Step 2: formpiston and former are fitted, and formpiston and former are located through shop bolt 9; At the Si Jiaochu of formpiston and former, formpiston and former are fixedly clamped through four pairs of locking double-screw bolts 2, locking nut 4, pads 1; Be screwed in the demoulding screwed hole 11 from the outside with demoulding double-screw bolt 5, demoulding double-screw bolt is filled demoulding screwed hole full and demoulding stud end does not stretch in the buffering runner;
Step 3: after mixed with resin, heating, with resin 12 injections, when resin flows out from emitting oral pore 15, stop injection from the geat hole through injector;
Step 4: after treating resin solidification, remove locking double-screw bolt 2, locking nut 4, the pad 1 of shop bolt and four jiaos; In the branch mould screwed hole of formpiston, be screwed into branch mould double-screw bolt, formpiston is separated with former; Demoulding double-screw bolt is continued to be screwed in the demoulding screwed hole, the moulding plate is separated from formpiston;
Step 5: the moulding plate after the demoulding is cut according to the position at preform place, and excision cushions the resin mass that runner forms, and obtains not having the square thin-walled flat part of surface damage.
Claims (2)
1. a device that is used for the unidirectional injection moulding of square thin-walled flat part RTM is characterized in that: comprise former and formpiston; Former and formpiston are the square plate structure;
The former medium position has square die cavity; Be used to place square preform; Wherein preform is close to the die cavity both sides inwall that is parallel to the resin flows direction, preform and the clearance channel that has same widths perpendicular to the die cavity both sides inwall of resin flows direction; Have a circle seal groove at the die cavity outward flange; The former corner location has connecting hole, is used for injection process and is fastenedly connected through clamping screw and formpiston; On former, also have a pair of pin locating hole, be used for the location of former and formpiston;
The corresponding position of formpiston and preform is the plane; Formpiston and the corresponding position of two interspace passages have straight line type buffering runner; The buffering runner is perpendicular to the resin flows direction, and the buffering flow channel length equals clearance channel length, and the buffering width of flow path is less than the clearance channel width; Article two, the center of buffering runner has vertical through hole, and a vertical through hole is as the geat hole, and another vertical through hole is as emitting oral pore; In the buffering runner, also have a plurality of demoulding screwed holes, demoulding screwed hole is in the both sides in geat hole and the both sides that emit oral pore; On formpiston, also have a pair of pin locating hole, and corresponding with a pair of pin locating hole on the former; Have branch mould screwed hole at the formpiston corner location, divide mould screwed hole position corresponding, and divide mould screwed hole internal diameter greater than the connecting hole internal diameter with the connecting hole position of four jiaos of formers.
2. method that adopts the said device of claim 1 to carry out the unidirectional injection moulding of square thin-walled flat part RTM is characterized in that: may further comprise the steps:
Step 1: coating release agent on cavity space and male mold surfaces; Preform is put into cavity space, and preform and the die cavity both sides inwall that is parallel to the resin flows direction are close to, preform and the clearance channel that has same widths perpendicular to the die cavity both sides inwall of resin flows direction; Sealing joint strip is filled in the die cavity seal groove on every side;
Step 2: formpiston and former are fitted, and formpiston and former are located through shop bolt; At the Si Jiaochu of formpiston and former, formpiston and former are fixedly clamped through clamping screw; Be screwed in the demoulding screwed hole from the outside with demoulding double-screw bolt, demoulding double-screw bolt is filled demoulding screwed hole full and demoulding stud end does not stretch into the buffering runner;
Step 3: after mixed with resin, heating, resin is injected from the geat hole through injector, when resin when the rising head orifice flow goes out, stop injection;
Step 4: after treating resin solidification, remove the clamping screw of shop bolt and four jiaos; In the branch mould screwed hole of formpiston, be screwed into branch mould double-screw bolt, formpiston is separated with former; Demoulding double-screw bolt is continued to be screwed in the demoulding screwed hole, the moulding plate is separated from formpiston;
Step 5: the moulding plate after the demoulding is cut according to the position at preform place, and excision cushions the resin mass that runner forms, and obtains not having the square thin-walled flat part of surface damage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210064326.1A CN102602010B (en) | 2012-03-13 | 2012-03-13 | RTM (resin transfer molding) one-way injection molding device for square thin-walled plate parts and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210064326.1A CN102602010B (en) | 2012-03-13 | 2012-03-13 | RTM (resin transfer molding) one-way injection molding device for square thin-walled plate parts and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102602010A true CN102602010A (en) | 2012-07-25 |
| CN102602010B CN102602010B (en) | 2014-05-14 |
Family
ID=46519966
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210064326.1A Expired - Fee Related CN102602010B (en) | 2012-03-13 | 2012-03-13 | RTM (resin transfer molding) one-way injection molding device for square thin-walled plate parts and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102602010B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105881933A (en) * | 2016-04-01 | 2016-08-24 | 西北工业大学 | Forming mold and forming method suitable for composite materials of RTM T-shaped panels with stiffening ribs |
| CN111169044A (en) * | 2019-12-13 | 2020-05-19 | 中航复合材料有限责任公司 | RTM (resin transfer molding) forming die and method for composite material blade |
| CN113021719A (en) * | 2021-03-15 | 2021-06-25 | 北京交通大学 | Superconducting coil dipping die and using method thereof |
| CN113085071A (en) * | 2021-03-25 | 2021-07-09 | 北京交通大学 | Superconducting coil dipping die and using method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002086579A (en) * | 2000-09-12 | 2002-03-26 | Toray Ind Inc | Method for producing frp structure |
| JP2007045005A (en) * | 2005-08-10 | 2007-02-22 | Sekisui Chem Co Ltd | Vacuum injection molding method of fiber reinforced resin molded product |
| JP2008272959A (en) * | 2007-04-26 | 2008-11-13 | Toray Ind Inc | Method for manufacturing fiber-reinforced resin |
| JP2011189541A (en) * | 2010-03-12 | 2011-09-29 | Toray Ind Inc | Mold for rtm molding |
| CN202480383U (en) * | 2012-03-13 | 2012-10-10 | 西北工业大学 | Device for resin transfer molding (RTM) unidirectional injection forming of square thin-wall flat plate |
-
2012
- 2012-03-13 CN CN201210064326.1A patent/CN102602010B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002086579A (en) * | 2000-09-12 | 2002-03-26 | Toray Ind Inc | Method for producing frp structure |
| JP2007045005A (en) * | 2005-08-10 | 2007-02-22 | Sekisui Chem Co Ltd | Vacuum injection molding method of fiber reinforced resin molded product |
| JP2008272959A (en) * | 2007-04-26 | 2008-11-13 | Toray Ind Inc | Method for manufacturing fiber-reinforced resin |
| JP2011189541A (en) * | 2010-03-12 | 2011-09-29 | Toray Ind Inc | Mold for rtm molding |
| CN202480383U (en) * | 2012-03-13 | 2012-10-10 | 西北工业大学 | Device for resin transfer molding (RTM) unidirectional injection forming of square thin-wall flat plate |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105881933A (en) * | 2016-04-01 | 2016-08-24 | 西北工业大学 | Forming mold and forming method suitable for composite materials of RTM T-shaped panels with stiffening ribs |
| CN105881933B (en) * | 2016-04-01 | 2017-10-10 | 西北工业大学 | Suitable for RTM T-shaped mould and forming method with muscle wallboard composite |
| CN111169044A (en) * | 2019-12-13 | 2020-05-19 | 中航复合材料有限责任公司 | RTM (resin transfer molding) forming die and method for composite material blade |
| CN113021719A (en) * | 2021-03-15 | 2021-06-25 | 北京交通大学 | Superconducting coil dipping die and using method thereof |
| CN113085071A (en) * | 2021-03-25 | 2021-07-09 | 北京交通大学 | Superconducting coil dipping die and using method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102602010B (en) | 2014-05-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102596533B (en) | A method and system for operating an injection molding machine | |
| DE60102826D1 (en) | FAST COMPACTION OF POROUS MOLDED PARTS WITH HIGH VISCUS RESIN OR PITCHES BY RESIN INJECTION PROCESS | |
| KR100885336B1 (en) | Injection molding method and apparatus | |
| CN101863108B (en) | Fused mass pulsing auxiliary injection molding device and method | |
| CN201669854U (en) | Melt pulsation assisted injection molding device | |
| CN102602010B (en) | RTM (resin transfer molding) one-way injection molding device for square thin-walled plate parts and method | |
| CN202480383U (en) | Device for resin transfer molding (RTM) unidirectional injection forming of square thin-wall flat plate | |
| CN206264264U (en) | A kind of injection mold of single die joint | |
| CN201158124Y (en) | One-time forming mold for two-color headlight mask | |
| CN204712390U (en) | A kind of LED non-spherical lens hot flow path injection-compression mould | |
| WO2012172669A1 (en) | Molding device for injection molding and injection molding machine | |
| KR200468472Y1 (en) | A gate runner with a cross-section of which flow diameter varies from a start point to an end point | |
| CN107972235A (en) | A kind of injection mold and its injection molding forming method | |
| CN107571465A (en) | A kind of forming method of single melt multiple injection | |
| CN104552803B (en) | The method of hollow product injection molding | |
| CN201736402U (en) | Anti-drawing insert type sprue bushing used for injection molding | |
| CN105014862A (en) | Foaming molding mold and molding method for microcellular foaming plastic structural parts | |
| CN204414493U (en) | The mould of the auxiliary injection mo(u)lding of water | |
| CN207014701U (en) | A kind of pipe clamp mould | |
| CN105437486A (en) | Injection mold with controllable pressure | |
| CN203267108U (en) | Pouring system for U-shaped member injection mold | |
| KR200481048Y1 (en) | Mold for injection molding having runner to prevent flow mark | |
| KR102429304B1 (en) | A vacuum injection molding apparatus and method for Teflon mold | |
| CN104626609A (en) | Preparation method of a carbon fiber automobile grille inspection tool | |
| CN204019888U (en) | High precision and long service life cold runner spray nozzle device for automobile high-voltage shield |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140514 Termination date: 20210313 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |