CN104260287A - Double color injection mold for front frame of computer - Google Patents
Double color injection mold for front frame of computer Download PDFInfo
- Publication number
- CN104260287A CN104260287A CN201410513055.2A CN201410513055A CN104260287A CN 104260287 A CN104260287 A CN 104260287A CN 201410513055 A CN201410513055 A CN 201410513055A CN 104260287 A CN104260287 A CN 104260287A
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- CN
- China
- Prior art keywords
- master mold
- male
- time master
- computer
- flexible glue
- 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.)
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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
-
- 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
- B29C45/03—Injection moulding apparatus
- B29C45/04—Injection moulding apparatus using movable moulds or mould halves
- B29C45/0441—Injection moulding apparatus using movable moulds or mould halves involving a rotational movement
-
- 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
- B29C45/1628—The materials being injected at different moulding stations using a mould carrier rotatable about an axis perpendicular to the opening and closing axis of the moulding stations
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
The invention discloses a double color injection mold for a front frame of a computer. The subsequent molding of a soft rubber part can be completed without take-out of a hard rubber part of the front frame of the computer. The operation is time-saving and labor-saving, so that the working efficiency is high, and the mold is suitable for batch production. The double color injection mold comprises an upper female mold part and a lower male mold part, wherein the female mold part and the male mold part are matched to form a cavity. The double color injection mold is characterized in that the female mold part specifically comprises a primary female mold and a secondary female mold, wherein the male mold part can axially rotate around a rotary shaft; by virtue of the rotation angle of the male mold part, the secondary female mold part, the male mold part and a hard rubber structure are matched to form a soft rubber cavity; the edges, corresponding to the hard rubber structure and the soft rubber part, of a female mold core of the secondary female mold protrude downwards; by virtue of the downward protrusion distance, the hard rubber structure is pre-pressed during the secondary injection.
Description
Technical field
The present invention relates to the technical field of mould structure, be specially frame bicolor injection mould before a kind of computer.
Background technology
Computer all-in-one machine obtained in recent years and developed very fast, as the electronic product needing often to contact with people, very important to the comfort level of people's contact, the shell of present all-in-one all uses ebonite, feel difference is bad, if use flexible glue at the specific position of the outward appearance of computer all-in-one machine, will effectively improve the comfort level of user, existing mould needs after being taken out by ebonite product, bond one deck flexible glue structure outside again, its operation is wasted time and energy, inefficiency, inadaptable batch production.
Summary of the invention
For the problems referred to above, the invention provides frame bicolor injection mould before a kind of computer, before it makes computer, the ebonite part of frame is without the need to taking out, can completing the shaping of follow-up flexible glue part, and it is time saving and energy saving to operate, make operating efficiency high, be applicable to batch production.
Frame bicolor injection mould before a kind of computer, its technical scheme is such: it comprises the female counterpart on top, the male portion of bottom, described female counterpart, male portion coordinates formation die cavity, it is characterized in that: described female counterpart specifically comprises first time master mold, second time master mold, described male portion can axially rotate around rotating shaft, the angle that described male portion rotates guarantees second time master mold and described male portion, ebonite respective outer side edges forms flexible glue die cavity, the mother module core of described second time master mold is convex under corresponding to the edge of described ebonite structure and flexible glue part, to the precompressed of ebonite structure when its lower convex distance guarantees second time injection moulding.
It is further characterized in that: described male portion specifically comprises two identical male models, two male models are arranged symmetrically with about the vertical median plane of rotating shaft, described first time master mold, second time master mold lays respectively at directly over two male models, described rotating shaft single rotates 180 °, and two described male models are supported on the base of injection molding machine respectively; Adopt the master mold male model that correspondence two is identical respectively that two different, the male model matched moulds of master mold and below forms ebonite die cavity for the first time, the demoulding afterwards, make first time master mold and male model, the separation of products of below, rotating shaft afterwards drives male model to rotate 180 °, the male model of second time master mold and below, product matched moulds, formation flexible glue die cavity, injection moulding again, forms product; Another male model alternately repeats above-mentioned steps simultaneously, makes twice injection mo(u)lding completing product in two die cavities successively, improves the production efficiency of product;
It is 0.03mm that the mother module core of described second time master mold corresponds to convex distance under the edge of described ebonite structure and flexible glue part, and when making injection moulding, flexible glue part can not enter the remainder of ebonite structure, guarantees the quality of injecting products;
The material road of described second time master mold is communicated to the entrance that Flexible glue runner enters son, described Flexible glue runner enters after sub outlet runs through described ebonite structure to be communicated to flexible glue die cavity, described software runner enters son and adopts monolateral gradient and the structure of blind edge, and mouth of a river thimble is mounted on the bottom that described Flexible glue runner enters the position, the mouth of a river, inner side of son respectively;
The plastic structure that enters that described Flexible glue runner enters son is specially ox horn and enters plastic structure;
Described first time master mold, second time master mold comprises upper mounted plate respectively, hot runner manifold, caster, mother module core, guide pin bushing, two identical male models comprise male die core respectively, male template, upper ejector plate, lower liftout plate, bottom plate, Flexible glue runner enters son, mouth of a river thimble, guide pillar, described first time master mold, the described guide pin bushing of second time master mold lays respectively at corner location, the described guide pillar of each described male model lays respectively at corner location, the guide pillar of the single described male model under matched moulds state respectively positioning and plug-in mounting in correspondence first time master mold or second time master mold correspondence position guide pin bushing inner chamber in,
The male die core of described male model tightens intrinsic die locating piece, described die locating piece epirelief is in the upper surface of described male die core, described first time master mold, correspondence position that the mother module core of second time master mold corresponds to described die locating piece is provided with detent, the described die locating piece under matched moulds state is flush-mounted in corresponding described detent;
The epirelief of described die locating piece is specially in the part of described male die core the inclined-plane closed up from bottom to top, and it guarantees the accurate of location;
When frame before computer is with sidepiece back-off structure, slanted kicking block is provided with in described male model, the bottom of described slanted kicking block is installed in the horizontal linear guide groove on fixed block top, the entirety that bottom is anchored on described upper ejector plate, lower liftout plate forms of described fixed block, is close to the end face outside of described sidepiece back-off structure inside the upper end of described slanted kicking block;
The zero degree bundle block of location is also comprised in whole set of die.
After adopting structure of the present invention, the male model of master mold and below forms ebonite die cavity for the first time, ebonite die cavity adopts hot flow path directly to enter glue, after injection moulding forms ebonite product, the demoulding, male model turns an angle to the below of second time master mold afterwards, matched moulds again, the male model of second time master mold and below, ebonite textural association forms flexible glue die cavity, and the mother module core of second time master mold is convex under corresponding to the edge of described ebonite structure and flexible glue part, to the precompressed of ebonite structure when its lower convex distance guarantees second time injection moulding, flexible glue enters flexible glue die cavity by material road injection moulding, make product injection mo(u)lding, before it makes computer, the ebonite part of frame is without the need to taking out, the shaping of follow-up flexible glue part can be completed, it is time saving and energy saving to operate, make operating efficiency high, be applicable to batch production.
Accompanying drawing explanation
Fig. 1 is male portion plan structure simplified schematic diagram of the present invention;
Fig. 2 is female counterpart plan structure simplified schematic diagram of the present invention;
Fig. 3 is the plan structure schematic diagram of male model of the present invention;
Fig. 4 be first time of the present invention master mold, male model mould-matching structure schematic diagram;
Fig. 5 is the mould-matching structure schematic diagram of second time master mold of the present invention, male model;
Fig. 6 is the concrete structure for amplifying schematic diagram in A place of Fig. 5;
Reference name in figure corresponding to each sequence number is as follows:
Female counterpart 1, male portion 2, master mold 3 for the first time, second time master mold 4, rotating shaft 5, ebonite structure 6, flexible glue die cavity 7, mother module core 8, base 9, Flexible glue runner enters son 10, mouth of a river thimble 11, upper mounted plate 12, hot runner manifold 13, caster 14, guide pin bushing 15, male die core 16, male template 17, upper ejector plate 18, lower liftout plate 19, bottom plate 20, guide pillar 21, die locating piece 22, detent 23, slanted kicking block 24, fixed block 25, zero degree bundle block 26, male model 27, ox horn enters plastic structure 28.
Detailed description of the invention
Frame bicolor injection mould before a kind of computer, see Fig. 1 ~ Fig. 6: it comprises the female counterpart 1 on top, the male portion 2 of bottom, female counterpart 1, male portion 2 coordinates formation die cavity, female counterpart 1 specifically comprises first time master mold 3, second time master mold 4, male portion 2 can axially rotate around rotating shaft 5, the angle that male portion 2 rotates guarantees second time master mold 4 and male portion 2, ebonite structure 6 coordinates formation flexible glue die cavity 7, it is convex under the mother module core 8 of master mold 4 corresponds to the edge of ebonite structure 6 and flexible glue part for the second time, to ebonite structure 6 precompressed when its lower convex distance D guarantees second time injection moulding.
Operation principle is as follows: the male portion 2 of master mold 3 and below forms ebonite die cavity for the first time, ebonite die cavity adopts hot flow path directly to enter glue, after injection moulding forms ebonite product, the demoulding, male portion 2 turns an angle to the below of second time master mold 4 afterwards, matched moulds again, the male portion 2 of second time master mold 4 and below, ebonite structure 6 is combined to form flexible glue die cavity 7, and the mother module core 8 of second time master mold 4 is convex under corresponding to the edge of ebonite structure 6 and flexible glue part, to ebonite structure 6 precompressed when its lower convex distance guarantees second time injection moulding, flexible glue is (not shown in FIG. by material road, belonging to existing mature structure) injection moulding enters flexible glue die cavity 7, make product injection mo(u)lding, before it makes computer, the ebonite part of frame is without the need to taking out, the shaping of follow-up flexible glue part can be completed, it is time saving and energy saving to operate, make operating efficiency high, be applicable to batch production.
Preferred structure: male portion 2 specifically comprises two identical male models 27, two male models 27 are arranged symmetrically with about the vertical median plane of rotating shaft 5, master mold 3, second time master mold 4 lay respectively at directly over two male models 27 for the first time, rotating shaft 5 single rotates 180 °, and two male models 27 are supported on the base 9 of injection molding machine respectively; Base 9 is circular configuration, and the center of rotating shaft 5 is the center of base 9; Adopt the master mold male model that correspondence two is identical respectively that two different, male model 27 matched moulds of master mold 3 and below forms ebonite die cavity for the first time, the demoulding afterwards, make the male model 27 of first time master mold 3 and below, ebonite structure 6 is separated, rotating shaft afterwards 5 drives male model 27 to rotate 180 °, the male model 27 of second time master mold 4 and below, ebonite structure 6 matched moulds, formation flexible glue die cavity 7, injection moulding again, forms product; Another male model 27 alternately repeats above-mentioned steps simultaneously, makes twice injection mo(u)lding completing product in two die cavities successively, improves the production efficiency of product;
It is 0.03mm that the mother module core 8 of second time master mold 4 corresponds to convex distance D under the edge of ebonite structure 6 and flexible glue part, when making injection moulding, flexible glue part can not enter the remainder of ebonite structure 6, and ebonite structure 6 surface is without obvious stress trace, guarantees the quality of injecting products;
The material road of second time master mold 4 is communicated to the entrance that Flexible glue runner enters son 10, Flexible glue runner enter son 10 outlet run through ebonite structure 6 after be communicated to flexible glue die cavity 7, software runner enters son 10 and adopts monolateral gradient and the structure of blind edge, and mouth of a river thimble 11 is mounted on the bottom that Flexible glue runner enters the position, the mouth of a river, inner side of son 10 respectively; Mouth of a river thimble 11 is when 7 demoulding of flexible glue die cavity, and waste material Flexible glue runner entered in son 10 detaches product, guarantees that follow-up injection moulding is carried out smoothly; The plastic structure that enters that Flexible glue runner enters son 10 is specially ox horn and enters plastic structure 28;
Master mold 3 for the first time, second time master mold 4 comprises upper mounted plate 12 respectively, hot runner manifold 13, caster 14, mother module core 8, guide pin bushing 15, two identical male models 27 comprise male die core 16 respectively, male template 17, upper ejector plate 18, lower liftout plate 19, bottom plate 20, Flexible glue runner enters son 10, mouth of a river thimble 11, guide pillar 21, master mold 3 for the first time, the guide pin bushing 15 of second time master mold 4 lays respectively at corner location, the guide pillar 21 of each male model 27 lays respectively at corner location, the guide pillar 21 of the single male model 27 under matched moulds state respectively positioning and plug-in mounting in correspondence first time master mold 3 or second time master mold 4 correspondence position guide pin bushing 15 inner chamber in,
The male die core 16 of male model 27 tightens intrinsic die locating piece 22, die locating piece 22 epirelief is in the upper surface of male die core, the correspondence position that the mother module core 8 of master mold 3, second time master mold 4 corresponds to die locating piece 22 is for the first time provided with detent 23, and the die locating piece 22 under matched moulds state is flush-mounted in corresponding detent 23; The male die core 16 of each male model 27 is fastened with respectively three pieces of die locating pieces 22, from four direction location, ensures the closing precision of die; The epirelief of die locating piece 22 is specially in the part of male die core 16 inclined-plane closed up from bottom to top, and it guarantees the accurate of location;
When frame before computer is with sidepiece back-off structure 23, slanted kicking block 24 is provided with in male model 27, the bottom of slanted kicking block 24 is installed in the horizontal linear guide groove on fixed block 25 top, the entirety that bottom is anchored on upper ejector plate 18, lower liftout plate 19 forms of fixed block 25, is close to the end face outside of sidepiece back-off structure 23 inside the upper end of slanted kicking block 24; The top of slanted kicking block 24 is mounted on product, increases product surface and ejects area, and what reduce product ejects distortion; Also comprise the zero degree bundle block 26 of location in whole set of die, guarantee the accurate positioning of mould.
Above specific embodiments of the invention have been described in detail, but content being only the preferred embodiment of the invention, the practical range for limiting the invention can not being considered to.All equalizations done according to the invention application range change and improve, and all should still belong within this patent covering scope.
Claims (10)
1. frame bicolor injection mould before a computer, it comprises the female counterpart on top, the male portion of bottom, described female counterpart, male portion coordinates formation die cavity, it is characterized in that: described female counterpart specifically comprises first time master mold, second time master mold, described male portion can axially rotate around rotating shaft, the angle that described male portion rotates guarantees second time master mold and described male portion, ebonite respective outer side edges forms flexible glue die cavity, the mother module core of described second time master mold is convex under corresponding to the edge of described ebonite structure and flexible glue part, to the precompressed of ebonite structure when its lower convex distance guarantees second time injection moulding.
2. frame bicolor injection mould before a kind of computer as claimed in claim 1, it is characterized in that: described male portion specifically comprises two identical male models, two male models are arranged symmetrically with about the vertical median plane of rotating shaft, described first time master mold, second time master mold lays respectively at directly over two male models, described rotating shaft single rotates 180 °, and two described male models are supported on the base of injection molding machine respectively.
3. frame bicolor injection mould before a kind of computer as claimed in claim 1, is characterized in that: it is 0.03mm that the mother module core of described second time master mold corresponds to convex distance under the edge of described ebonite structure and flexible glue part.
4. frame bicolor injection mould before a kind of computer as claimed in claim 1 or 2, it is characterized in that: the material road of described second time master mold is communicated to the entrance that Flexible glue runner enters son, described Flexible glue runner enters after sub outlet runs through described ebonite structure to be communicated to flexible glue die cavity, described software runner enters son and adopts monolateral gradient and the structure of blind edge, and mouth of a river thimble is mounted on the bottom that described Flexible glue runner enters the position, the mouth of a river, inner side of son respectively.
5. frame bicolor injection mould before a kind of computer as claimed in claim 4, is characterized in that: the plastic structure that enters that described Flexible glue runner enters son is specially ox horn and enters plastic structure.
6. frame bicolor injection mould before a kind of computer as claimed in claim 2, it is characterized in that: described first time master mold, second time master mold comprises upper mounted plate respectively, hot runner manifold, caster, mother module core, guide pin bushing, two identical male models comprise male die core respectively, male template, upper ejector plate, lower liftout plate, bottom plate, Flexible glue runner enters son, mouth of a river thimble, guide pillar, described first time master mold, the described guide pin bushing of second time master mold lays respectively at corner location, the described guide pillar of each described male model lays respectively at corner location, the guide pillar of the single described male model under matched moulds state respectively positioning and plug-in mounting in correspondence first time master mold or second time master mold correspondence position guide pin bushing inner chamber in.
7. frame bicolor injection mould before a kind of computer as claimed in claim 6, it is characterized in that: the male die core of described male model tightens intrinsic die locating piece, described die locating piece epirelief is in the upper surface of described male die core, described first time master mold, correspondence position that the mother module core of second time master mold corresponds to described die locating piece is provided with detent, the described die locating piece under matched moulds state is flush-mounted in corresponding described detent.
8. frame bicolor injection mould before a kind of computer as claimed in claim 7, is characterized in that: the epirelief of described die locating piece is specially in the part of described male die core the inclined-plane closed up from bottom to top.
9. frame bicolor injection mould before a kind of computer as claimed in claim 6, it is characterized in that: when frame before computer is with sidepiece back-off structure, slanted kicking block is provided with in described male model, the bottom of described slanted kicking block is installed in the horizontal linear guide groove on fixed block top, the entirety that bottom is anchored on described upper ejector plate, lower liftout plate forms of described fixed block, is close to the end face outside of described sidepiece back-off structure inside the upper end of described slanted kicking block.
10. frame bicolor injection mould before a kind of computer as claimed in claim 6, is characterized in that: the zero degree bundle block also comprising location in whole set of die.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410513055.2A CN104260287B (en) | 2014-09-29 | 2014-09-29 | Double color injection mold for front frame of computer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410513055.2A CN104260287B (en) | 2014-09-29 | 2014-09-29 | Double color injection mold for front frame of computer |
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| Publication Number | Publication Date |
|---|---|
| CN104260287A true CN104260287A (en) | 2015-01-07 |
| CN104260287B CN104260287B (en) | 2017-02-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410513055.2A Active CN104260287B (en) | 2014-09-29 | 2014-09-29 | Double color injection mold for front frame of computer |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104943070A (en) * | 2015-05-29 | 2015-09-30 | 宁海县现代模具有限公司 | Two-color die for automobile instrument boards |
| CN104999619A (en) * | 2015-07-31 | 2015-10-28 | 锦丰科技（深圳）有限公司 | Bi-color mold injection molding glue sealing structure and operation method thereof |
| CN105128261A (en) * | 2015-07-31 | 2015-12-09 | 锦丰科技（深圳）有限公司 | Two-color-mold rotation type ejection mechanism and running method thereof |
| CN105619725A (en) * | 2015-12-22 | 2016-06-01 | 宁波舜宇模具股份有限公司 | Double-color core-pulling rotary compound ejection mechanism |
| CN106738651A (en) * | 2016-12-24 | 2017-05-31 | 浙江工商职业技术学院 | A kind of rotary shaft type two-color die |
| CN107225730A (en) * | 2016-03-25 | 2017-10-03 | 苏州汉扬精密电子有限公司 | The ebonite sliding block of bijective product enters plastic structure |
| CN108215092A (en) * | 2018-02-02 | 2018-06-29 | 嘉兴信元精密模具科技有限公司 | A kind of delay Double-color injection mold structure of core pulling and open mold method |
| CN108274689A (en) * | 2018-04-02 | 2018-07-13 | 苏州双荣橡塑有限公司 | A kind of double-shot moulding integrated mould |
| CN109049532A (en) * | 2018-08-28 | 2018-12-21 | 浙江博大泵业有限公司 | A kind of screw rod of screw pump line with rubber mold and its application method |
| CN114393795A (en) * | 2021-11-30 | 2022-04-26 | 苏州三卓韩一橡塑科技有限公司 | Method for forming VR (virtual reality) mirror frame by heating, blowing and ejecting type oil pressure mechanism |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104943070A (en) * | 2015-05-29 | 2015-09-30 | 宁海县现代模具有限公司 | Two-color die for automobile instrument boards |
| CN104999619A (en) * | 2015-07-31 | 2015-10-28 | 锦丰科技（深圳）有限公司 | Bi-color mold injection molding glue sealing structure and operation method thereof |
| CN105128261A (en) * | 2015-07-31 | 2015-12-09 | 锦丰科技（深圳）有限公司 | Two-color-mold rotation type ejection mechanism and running method thereof |
| CN105619725A (en) * | 2015-12-22 | 2016-06-01 | 宁波舜宇模具股份有限公司 | Double-color core-pulling rotary compound ejection mechanism |
| CN107225730A (en) * | 2016-03-25 | 2017-10-03 | 苏州汉扬精密电子有限公司 | The ebonite sliding block of bijective product enters plastic structure |
| CN106738651A (en) * | 2016-12-24 | 2017-05-31 | 浙江工商职业技术学院 | A kind of rotary shaft type two-color die |
| CN108215092A (en) * | 2018-02-02 | 2018-06-29 | 嘉兴信元精密模具科技有限公司 | A kind of delay Double-color injection mold structure of core pulling and open mold method |
| CN108215092B (en) * | 2018-02-02 | 2023-09-26 | 嘉兴信元精密模具科技有限公司 | Dual-color injection mold structure with delayed core pulling function and mold opening and closing method |
| CN108274689A (en) * | 2018-04-02 | 2018-07-13 | 苏州双荣橡塑有限公司 | A kind of double-shot moulding integrated mould |
| CN109049532A (en) * | 2018-08-28 | 2018-12-21 | 浙江博大泵业有限公司 | A kind of screw rod of screw pump line with rubber mold and its application method |
| CN109049532B (en) * | 2018-08-28 | 2023-10-31 | 浙江博大泵业有限公司 | Screw pump screw rubber lining die and using method thereof |
| CN114393795A (en) * | 2021-11-30 | 2022-04-26 | 苏州三卓韩一橡塑科技有限公司 | Method for forming VR (virtual reality) mirror frame by heating, blowing and ejecting type oil pressure mechanism |
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|---|---|
| CN104260287B (en) | 2017-02-01 |
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