CN104325603A - Method and mould for improving quality of soft-hard rubber dividing surface of double-color injection automobile part - Google Patents
Method and mould for improving quality of soft-hard rubber dividing surface of double-color injection automobile part Download PDFInfo
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- CN104325603A CN104325603A CN201410398166.3A CN201410398166A CN104325603A CN 104325603 A CN104325603 A CN 104325603A CN 201410398166 A CN201410398166 A CN 201410398166A CN 104325603 A CN104325603 A CN 104325603A
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- soft
- cover half
- dynamic model
- hard glue
- mould
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Classifications
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- 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
- B29C45/26—Moulds
- B29C45/2602—Mould construction elements
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- 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
- B29C45/0025—Preventing defects on the moulded article, e.g. weld lines, shrinkage marks
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- 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
- B29C45/16—Making multilayered or multicoloured articles
- B29C45/1615—The materials being injected at different moulding stations
-
- 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
- B29C45/16—Making multilayered or multicoloured articles
- B29C2045/1682—Making multilayered or multicoloured articles preventing defects
Abstract
The invention discloses a method for improving quality of a soft-hard rubber dividing surface of a double-color injection automobile part. The method includes following steps: (1) arranging a moulding moving die, a primary moulding fixed die and a secondary moulding fixed die; (2) locking a primary moulding part of a single-color material on the moving die or the fixed dies or arranging a bevel on the moving die or the fixed die at a horizontal intersection position of soft rubber and hard rubber and reducing the rubber in a gently transition manner for preventing material overflow and flash marks; (3) performing die closing between the molding moving die and the primary moulding fixed die and filling a cavity with a material in a first color to mould a single-color hard rubber part; and (4) after die opening of the molding moving die and the primary moulding fixed die, performing the die closing between the molding moving die and the secondary moulding fixed die and filling a cavity with a material in a second color to mould a double-color soft-hard rubber product. The invention also discloses a mould for carrying out the method. In the invention, by means of arrangement of a reversed buckle, a bevel, positioning rib bars or positioning rib grooves, a surface rubber sealing effect of the soft-hard rubber dividing surface is improved and a flash mark problem in the soft-hard rubber dividing surface is completely solved.
Description
Technical field
The present invention relates to injection mold technology, be specifically related to the method and the mould that improve double-shot moulding automobile component soft or hard glue die joint quality.
Background technology
Along with the fast development of China's automobile industry, also driven the fast development of automobile die technology, automobile die and product have huge market, and this is also owing to needing a large amount of auto parts and components to ensure in the finished product in automobile making.Our main or import of high-end parts in body of a motor car part, engine product etc. is now main, mould equipment is the pith in automobile making, but the manufacturing capacity of the precision die of China and the accumulation of product manufacturing technology not enough.Also the auto parts and components mould just causing high-grade car is nearly all the phenomenon of imported product.
The complicated plastic parts from the cylinder body die casting of the heart generator of automobile to body of a motor car, each operation is that requirement is higher.In order to weight reduction and reduction structural complexity, the light metals such as aluminium alloy, and the application of double-material injection-molding parts on automobile will get more and more, automotive light weight technology, new material shaping dies, multistation progressive die are all the guarantees of the development advancing Automobile Self-brand.
See accompanying drawing 1, at present, the two-shot molding process that large complicated automobile is articles injection-moulded is all generally adopt quadric injection mould form, also known as single mode dijection form, comprises rotary, portable etc.Tradition Complicated Automobile parts double-shot moulding mode, has a feature to be, after will first carrying out an injection moulding, to the first look material parts sizing, then carry out the second look material injection moulding, form complete double-shot moulding product.
This technology can cause many problems of product quality to occur, first the first look material parts can produce the deformations such as contraction, distortion after sizing, causes producing gap when second time injection moulding, die joint forms batch cutting edge of a knife or a sword; Next is that the first color part is shaped, then carries out the second color part injection moulding, and insufficient situation may appear in fusion between the two, affects the quality of double-colored product.
This situation is when using the different plastic material of soft, hard two kinds of hardness to carry out injection moulding, batch cutting edge of a knife or a sword phenomenon of soft or hard glue (the i.e. double-colored material) die joint caused because of reasons such as distortion is even more serious, the surface quality of the soft or hard glue die joint of double color mould injection molded automobile parts product is generally bad, because batch cutting edge of a knife or a sword problem of its die joint cannot solve, seriously to making the product die joint of more than 85% produce serious batch cutting edge of a knife or a sword, cause integral product off quality.
See accompanying drawing 2,6,8, the reason of the problems referred to above is caused to mainly contain following several respects: 1. under the transformation from high temperature to normal temperature environment, product cooling meat can produce package power, product is caused to be drawn pine, the monochromatic ebonite part that this situation can make the first look material injection moulding be formed is drawn pine, leaves the hidden danger producing burr during double-colored soft or hard glue product for follow-up second look material injection molded; 2. product shrinks and processing cumulative errors, the ebonite part of the flat intersection of soft or hard glue can be caused to produce and shrink, form gap, and then for leaving the hidden danger producing burr during the double-colored soft or hard glue product of follow-up second look material injection molded.3. under the environment of the powerful injection pressure of injection machine, the ebonite part of the vertical intersection of soft or hard glue can be caused to be rushed distortion, form gap, and then for leaving the hidden danger producing burr during the double-colored soft or hard glue product of follow-up second look material injection molded.
Summary of the invention
For the above-mentioned deficiency of prior art, the object of the invention is to, the method improving double-shot moulding automobile component soft or hard glue die joint surface quality is provided, the mould implementing the method is also provided simultaneously.
The technical scheme that the present invention is adopted for achieving the above object is: a kind of method improving double-shot moulding automobile component soft or hard glue die joint quality, and it is characterized in that, it comprises the following steps:
1) shaping dynamic model, one-shot forming cover half and post forming cover half are set, when described shaping dynamic model matches with one-shot forming cover half, form one-shot forming mould, when described shaping dynamic model matches with post forming cover half, form secondary forming die;
2) on dynamic model or cover half, lock the one-shot forming part of monochromatic material, or on the dynamic model or cover half of the flat intersection of soft or hard glue, arrange inclined-plane and gentle transition subtracts glue, when preventing quadric injection mould, material overflows, runs batch cutting edge of a knife or a sword;
Described step 2), what specifically comprise the steps is one or more:
21) back-off is set on the sidewall or thimble of shaping dynamic model, by ebonite part fastening during one-shot forming at shaping dynamic model, prevents from being drawn pine;
22) on the post forming cover half of the flat intersection of soft or hard glue, arrange inclined-plane, the periphery along ebonite part compresses, and makes ebonite gentle transition subtract glue, and when preventing quadric injection mould, flexible glue overflows, and runs batch cutting edge of a knife or a sword.
23) in the ebonite part of the vertical intersection of soft or hard glue, form location rib or positioning bar groove, the injection pressure be used for when keeping out quadric injection mould, prevents ebonite part from being rushed distortion, runs batch cutting edge of a knife or a sword.Step 23) in, be set forth in the vertical intersection of soft or hard glue ebonite part on form location rib or positioning bar groove, comprise following three kinds of implementation steps:
23.1) location rib or positioning bar groove are set on the shaping dynamic model of the vertical intersection of soft or hard glue, make ebonite part be positioned at shaping dynamic model side and form corresponding positioning bar groove or location rib;
23.2) location rib or positioning bar groove are set on the one-shot forming cover half of the vertical intersection of soft or hard glue, make ebonite part be positioned at one-shot forming cover half side and form corresponding positioning bar groove or location rib; The positioning bar groove formed with ebonite part is set on the post forming cover half of the vertical intersection of soft or hard glue or locates the suitable location rib of rib or positioning bar groove;
23.3) implementation step 23.1 while) and step 23.2);
Described step 23.1) step 23.2) without sequencing.
3) shaping dynamic model and one-shot forming cover half phase matched moulds; By the material injection type intracavity forming of the first look monochromatic ebonite part;
4) after shaping dynamic model and the die sinking of one-shot forming cover half phase, then with post forming cover half phase matched moulds; By the material injection type intracavity forming double-colored soft or hard glue product of the second look.
A kind of mould of raising double-shot moulding automobile component soft or hard glue die joint quality of described method, it is characterized in that, comprise shaping dynamic model, one-shot forming cover half and post forming cover half, described shaping dynamic model matches with one-shot forming cover half and forms one-shot forming mould, and described shaping dynamic model matches with post forming cover half formation secondary forming die; Be provided with the device of the one-shot forming part of locking monochromatic material in dynamic model or cover half, or arrange the inclined-plane that a cooperation gentle transition subtracts glue on the dynamic model or cover half of the flat intersection of soft or hard glue, when preventing quadric injection mould, material overflows, runs batch cutting edge of a knife or a sword.
Further, the sidewall or thimble of described shaping dynamic model are provided with back-off, by ebonite part fastening during one-shot forming on shaping dynamic model, prevent from being drawn pine.
Further, the post forming cover half of the described flat intersection of soft or hard glue is provided with inclined-plane, the periphery along ebonite part compresses, and makes ebonite gentle transition subtract glue, and when preventing quadric injection mould, flexible glue overflows.
Further, the shaping dynamic model of the described vertical intersection of soft or hard glue is provided with location rib or positioning bar groove.
Further, the one-shot forming cover half of the described vertical intersection of soft or hard glue is provided with location rib or positioning bar groove; The post forming cover half of the described vertical intersection of soft or hard glue is provided with corresponding location rib or positioning bar groove.
Further, the wide 0.8mm-1mm of back-off of described sidewall, thick 0.5mm-0.8mm.The back-off small end 0.5mm-1.0mm of described thimble, holds 1mm-2.5mm greatly, gradient 5-10 °.Described inclined-plane height 0.1mm-0.2, wide 5-10mm, gradient 2-6 °.Described location rib or positioning bar groove width 0.5mm-1mm, high 0.5mm-2mm.
The invention has the advantages that: for the three large reasons producing burr problem, by arranging back-off, inclined-plane and location rib or positioning bar groove, improve the soft or hard glue die joint sealing effect of double color mould product, thorough solution soft or hard glue die joint criticizes cutting edge of a knife or a sword problem, makes soft or hard glue die joint surface sealing quality reach the qualification rate of more than 90%.
Below in conjunction with accompanying drawing and detailed description of the invention, the present invention is further described.
Accompanying drawing explanation
Fig. 1 is the overall structure schematic diagram of existing bicolor injection mould;
Fig. 2 is existing shaping dynamic model structural representation;
Fig. 3 is the shaping dynamic model structural representation after the present invention improves;
Fig. 4 is sidewall back-off enlarged diagram in Fig. 3;
Fig. 5 is thimble back-off enlarged diagram in Fig. 3;
Fig. 6 is the traditional structure schematic diagram of the flat intersection of soft or hard glue;
Fig. 7 is the modified node method schematic diagram of the flat intersection of soft or hard glue;
Fig. 8 is the traditional structure schematic diagram of the vertical intersection of soft or hard glue;
Fig. 9 is the modified node method schematic diagram of the vertical intersection of soft or hard glue;
In figure: 1. shaping dynamic model; 11. sidewalls; 12. thimbles; 13. back-offs; 2. one-shot forming cover half;
3. post forming cover half; 31. inclined-planes; 4. ebonite part; 41. location ribs;
42. positioning bar grooves; 5. flexible glue part; 6. rotary disk; 7. fixed disk;
8. the materail tube of the first look; 9. the materail tube of the second look.
Detailed description of the invention
See Fig. 1 to Fig. 9, the method for the raising double-shot moulding automobile component soft or hard glue die joint surface quality that the present embodiment provides, it comprises the following steps:
1) shaping dynamic model 1, one-shot forming cover half 2 and post forming cover half 3 are set, when described shaping dynamic model 1 matches with one-shot forming cover half 2, form one-shot forming mould, when described shaping dynamic model 1 matches with post forming cover half 3, form secondary forming die;
2) on dynamic model or cover half, lock the one-shot forming part of monochromatic material, or on the dynamic model or cover half of the flat intersection of soft or hard glue, arrange inclined-plane and gentle transition subtracts glue, when preventing quadric injection mould, material overflows, runs batch cutting edge of a knife or a sword; This monochromatic material can be ebonite material, also can be flexible glue material.
It specifically comprises the steps:
21) back-off 13 is set on the sidewall 11 or thimble 12 of shaping dynamic model 1, by ebonite part 4 fastening during one-shot forming at shaping dynamic model 1, prevents from being drawn pine;
22) on the post forming cover half 3 of the flat intersection of soft or hard glue, arrange inclined-plane 31, the periphery prolonging ebonite part 4 compresses, and makes ebonite gentle transition subtract glue, and when preventing quadric injection mould, flexible glue overflows, and runs batch cutting edge of a knife or a sword;
23) in the ebonite part 4 of the vertical intersection of soft or hard glue, location rib 41 or positioning bar groove 42 is formed, the injection pressure be used for when keeping out quadric injection mould, ebonite part 4 is prevented to be out of shape (namely during 5 injection moulding of flexible glue part by punching, ebonite part 4 is produced and impacts, it is made to be out of shape), run batch cutting edge of a knife or a sword; Wherein, be set forth in the vertical intersection of soft or hard glue ebonite part 4 on form location rib 41 or positioning bar groove 42, comprise following three kinds of implementation steps:
4.1) location rib or positioning bar groove are set on the shaping dynamic model 1 of the vertical intersection of soft or hard glue, make ebonite part 4 be positioned at shaping dynamic model 1 side and form corresponding positioning bar groove or location rib;
4.2) location rib or positioning bar groove are set on the one-shot forming cover half 2 of the vertical intersection of soft or hard glue, make ebonite part be positioned at one-shot forming cover half 2 side and form corresponding positioning bar groove or location rib; The positioning bar groove formed with ebonite part is set on the post forming cover half 3 of the vertical intersection of soft or hard glue or locates the suitable location rib of rib or positioning bar groove;
4.3) implementation step 4.1 while) and step 4.2); The present embodiment adopts the third implementation step.
3) shaping dynamic model 1 and one-shot forming cover half 2 phase matched moulds; By the material injection type intracavity forming of the first look monochromatic ebonite part 4;
4) after shaping dynamic model 1 and the die sinking of one-shot forming cover half 2 phase, then with post forming cover half 3 phase matched moulds; By the material injection type intracavity forming double-colored soft or hard glue product of the second look.
A kind of mould improving bicolor injection mould soft or hard glue die joint sealing effect, comprise shaping dynamic model 1, one-shot forming cover half 2 and post forming cover half 3, described shaping dynamic model 1 matches with one-shot forming cover half 2 and forms one-shot forming mould, and described shaping dynamic model 1 matches with post forming cover half 3 formation secondary forming die; Sidewall 11 or the thimble 11 of described shaping dynamic model 1 are provided with back-off 13; The post forming cover half 3 of the described flat intersection of soft or hard glue is provided with inclined-plane 31; The shaping dynamic model 1 of the described vertical intersection of soft or hard glue is provided with location rib or positioning bar groove.
Described shaping dynamic model 1 comprises two, and it is located on rotary disk 6, and described one-shot forming cover half 2 and post forming cover half 3 are located on fixed disk 7, and with the materail tube 8 of the first look and the materail tube 9 of the second look corresponding respectively.By arranging rotary disk 6, when exchanging die cavity, shaping dynamic model 1 can be made accurately to rotate 180 °, form periodically injection moulding.Shaping dynamic model 1 and one-shot forming cover half 2 phase matched moulds, by the material injection type intracavity forming of the first look monochromatic ebonite part 4; After shaping dynamic model 1 and the die sinking of one-shot forming cover half 2 phase, rotary disk rotates 180 °, again with post forming cover half 3 phase matched moulds, by the material injection type intracavity forming double-colored soft or hard glue product of the second look, and meanwhile, another shaping dynamic model 1 can with one-shot forming cover half 2 phase matched moulds, by monochromatic for the material injection type intracavity forming of the first look ebonite product.After die sinking, rotary disk rotates 180 °, enters next cycle.
The one-shot forming cover half 2 of the described vertical intersection of soft or hard glue is provided with location rib or positioning bar groove; The post forming cover half 3 of the described vertical intersection of soft or hard glue is provided with corresponding location rib or positioning bar groove.
The wide 0.8mm-1mm of back-off 13 of described sidewall 11, thick 0.5mm-0.8mm.The back-off 13 small end 0.5mm-1.0mm of described thimble 12, holds 1mm-2.5mm greatly, gradient 5-10 °.Described inclined-plane height 0.1mm-0.2, wide 5-10mm, gradient 2-6 °.Described location rib or positioning bar groove width 0.5mm-1mm, high 0.5mm-2mm.
The present invention is not limited to above-mentioned embodiment; adopt the step identical or approximate with the above embodiment of the present invention and structure; and other obtaining improve the method for double-shot moulding automobile component soft or hard glue die joint surface quality and implement the mould of the method, all within protection scope of the present invention.
Claims (10)
1. improve a method for double-shot moulding automobile component soft or hard glue die joint quality, it is characterized in that, it comprises the following steps:
1) shaping dynamic model, one-shot forming cover half and post forming cover half are set, when described shaping dynamic model matches with one-shot forming cover half, form one-shot forming mould, when described shaping dynamic model matches with post forming cover half, form secondary forming die;
2) on dynamic model or cover half, lock the one-shot forming part of monochromatic material, or on the dynamic model or cover half of the flat intersection of soft or hard glue, arrange inclined-plane and gentle transition subtracts glue, when preventing quadric injection mould, material overflows, runs batch cutting edge of a knife or a sword;
3) shaping dynamic model and one-shot forming cover half phase matched moulds; By the material injection type intracavity forming of the first look monochromatic ebonite part;
4) after shaping dynamic model and the die sinking of one-shot forming cover half phase, then with post forming cover half phase matched moulds; By the material injection type intracavity forming double-colored soft or hard glue product of the second look.
2. the method for raising double-shot moulding automobile component soft or hard glue die joint quality according to claim 1, is characterized in that, described step 2), specifically following steps:
21) back-off is set on the sidewall or thimble of shaping dynamic model, by ebonite part fastening during one-shot forming at shaping dynamic model, prevents from being drawn pine;
3. the method for raising double-shot moulding automobile component soft or hard glue die joint quality according to claim 1, is characterized in that, described step 2), specifically following steps:
22) on the post forming cover half of the flat intersection of soft or hard glue, arrange inclined-plane, the periphery along ebonite part compresses, and makes ebonite gentle transition subtract glue, and when preventing quadric injection mould, flexible glue overflows, and runs batch cutting edge of a knife or a sword.
4. the method for raising double-shot moulding automobile component soft or hard glue die joint quality according to claim 1, is characterized in that, described step 2), specifically following steps:
23) in the ebonite part of the vertical intersection of soft or hard glue, form location rib or positioning bar groove, the injection pressure be used for when keeping out quadric injection mould, prevents ebonite part from being rushed distortion, runs batch cutting edge of a knife or a sword.
5. the method for raising double-shot moulding automobile component soft or hard glue die joint quality according to claim 4, it is characterized in that, step 23) in, be set forth in the vertical intersection of soft or hard glue ebonite part on form location rib or positioning bar groove, comprise following three kinds of implementation steps:
23.1) location rib or positioning bar groove are set on the shaping dynamic model of the vertical intersection of soft or hard glue, make ebonite part be positioned at shaping dynamic model side and form corresponding positioning bar groove or location rib;
23.2) location rib or positioning bar groove are set on the one-shot forming cover half of the vertical intersection of soft or hard glue, make ebonite part be positioned at one-shot forming cover half side and form corresponding positioning bar groove or location rib; The positioning bar groove formed with ebonite part is set on the post forming cover half of the vertical intersection of soft or hard glue or locates the suitable location rib of rib or positioning bar groove;
23.3) implementation step 23.1 while) and step 23.2);
Described step 23.1) step 23.2) without sequencing.
6. one kind implements the claims the mould of the raising double-shot moulding automobile component soft or hard glue die joint quality of one of 1 to 5 described method, it is characterized in that, comprise shaping dynamic model, one-shot forming cover half and post forming cover half, described shaping dynamic model matches with one-shot forming cover half and forms one-shot forming mould, and described shaping dynamic model matches with post forming cover half formation secondary forming die; Be provided with the device of the one-shot forming part of locking monochromatic material in dynamic model or cover half, or arrange the inclined-plane that a cooperation gentle transition subtracts glue on the dynamic model or cover half of the flat intersection of soft or hard glue, when preventing quadric injection mould, material overflows, runs batch cutting edge of a knife or a sword.
7. the mould of raising double-shot moulding automobile component soft or hard glue die joint quality according to claim 6, it is characterized in that, the sidewall or thimble of described shaping dynamic model are provided with back-off, by ebonite part fastening during one-shot forming on shaping dynamic model, prevent from being drawn pine.
8. the mould of raising double-shot moulding automobile component soft or hard glue die joint quality according to claim 6, it is characterized in that, the post forming cover half of the described flat intersection of soft or hard glue is provided with inclined-plane, periphery along ebonite part compresses, make ebonite gentle transition subtract glue, when preventing quadric injection mould, flexible glue overflows.
9. the mould of raising double-shot moulding automobile component soft or hard glue die joint quality according to claim 6, is characterized in that, the shaping dynamic model of the described vertical intersection of soft or hard glue is provided with location rib or positioning bar groove.
10. the mould of raising double-shot moulding automobile component soft or hard glue die joint quality according to claim 9, is characterized in that, the one-shot forming cover half of the described vertical intersection of soft or hard glue is provided with location rib or positioning bar groove; The post forming cover half of the described vertical intersection of soft or hard glue is provided with corresponding location rib or positioning bar groove.
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| CN201410398166.3A CN104325603A (en) | 2014-08-13 | 2014-08-13 | Method and mould for improving quality of soft-hard rubber dividing surface of double-color injection automobile part |
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| CN201410398166.3A CN104325603A (en) | 2014-08-13 | 2014-08-13 | Method and mould for improving quality of soft-hard rubber dividing surface of double-color injection automobile part |
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| CN108099114A (en) * | 2017-12-22 | 2018-06-01 | 台州市黄岩宇亚模具有限公司 | A kind of multi-time injection mould and its application method |
| CN110480944A (en) * | 2019-08-15 | 2019-11-22 | 昆山市鸿毅达精密模具有限公司 | Automotive safety lid bicolor injection mould |
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| CN108099114A (en) * | 2017-12-22 | 2018-06-01 | 台州市黄岩宇亚模具有限公司 | A kind of multi-time injection mould and its application method |
| CN110480944A (en) * | 2019-08-15 | 2019-11-22 | 昆山市鸿毅达精密模具有限公司 | Automotive safety lid bicolor injection mould |
| WO2021077499A1 (en) * | 2019-10-22 | 2021-04-29 | 广东乐心医疗电子股份有限公司 | Multi-color rubber belt body and manufacturing method therefor, and wearable device |
| CN112984459A (en) * | 2019-12-16 | 2021-06-18 | 株式会社小糸制作所 | Two-color molded article and two-color molding method |
| CN112984459B (en) * | 2019-12-16 | 2024-02-13 | 株式会社小糸制作所 | Bicolor molding part and bicolor molding method |
| CN113492491A (en) * | 2021-06-07 | 2021-10-12 | 常州市佳乐车辆配件制造有限公司 | Dial plate double-color injection molding process for automobile air conditioner grille |
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Application publication date: 20150204 |