CN103963230A - Injection moulding process and mould for precision and minitype plastic piece - Google Patents
Injection moulding process and mould for precision and minitype plastic piece Download PDFInfo
- Publication number
- CN103963230A CN103963230A CN201410165125.XA CN201410165125A CN103963230A CN 103963230 A CN103963230 A CN 103963230A CN 201410165125 A CN201410165125 A CN 201410165125A CN 103963230 A CN103963230 A CN 103963230A
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- China
- Prior art keywords
- flows
- branch
- cast gate
- plastic parts
- working
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- 239000004033 plastic Substances 0.000 title claims abstract description 53
- 229920003023 plastic Polymers 0.000 title claims abstract description 53
- 238000001746 injection moulding Methods 0.000 title claims abstract description 8
- 239000000463 material Substances 0.000 claims abstract description 33
- 238000000034 method Methods 0.000 claims abstract description 21
- 238000002347 injection Methods 0.000 claims description 10
- 239000007924 injection Substances 0.000 claims description 10
- 238000007599 discharging Methods 0.000 claims description 6
- 238000000465 moulding Methods 0.000 abstract description 3
- 238000003466 welding Methods 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 235000019994 cava Nutrition 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
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
- B29C45/27—Sprue channels ; Runner channels or runner nozzles
-
- 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
- B29C45/32—Moulds having several axially spaced mould cavities, i.e. for making several separated articles
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The invention discloses an injection moulding process and mould for a precision and minitype plastic piece. The technological process adopting the mould comprises the following steps: firstly, a material flow flows into a main channel from a main pouring gate, then flows into sub channels, flows from the end part of each sub channel through a secondary pouring gate in a perpendicular manner to a center confluence opening corresponding to sub channel group, and then flows into a cavity of each plastic piece. During injecting moulding, the material flow flows through the sub channel, particularly passes through the secondary pouring gates and flows into the center confluence opening of the sub channel group in a perpendicular manner, so that the material flow which flows into the center confluence opening can spread out uniformly and flows into the sub channel groups uniformly; the material flows can finally reach and fill every cavity of the plastic pieces uniformly and simultaneously, so that the cavity of each plastic piece has excellent welding trace jointing strength, the impact resistance of the plastic piece is improved, the uniformity of the product size is improved, the product yield is high, and the product performance is better.
Description
Technical field
The present invention relates to working of plastics injection molding technology field, specifically refer to a kind of Shooting Technique and mould of accurate miniature plastic parts.
Background technology
Accurate miniature plastic parts product (such as small-sized button piece) adopts injection mo(u)lding, except requiring the good uniformity of high, the isotype many caves of dimensional accuracy, also need to possess the mechanical characteristics such as intensity is high, shock resistance, these characteristics are inseparable with Shooting Technique and the mould of this product of moulding.Shooting Technique and mould are at present: material stream enters sprue from main cast gate, then divide and flow into each runner, again in the end horizontal of each runner divide flow into be positioned at isoplanar and be surrounding around some branch roads, finally flow in the working of plastics die cavity of each branch road end.The cooling rear also demoulding gained working of plastics of injection moulding and waste material are as shown in Figure 4.Though adopt the working of plastics of this technique and mould gained to there is certain dimensional accuracy, but there is uneven problem in isotype many caves uniformity, intensity, impact resistance, this be due to described some branch roads with in runner isoplanar, be located at and relative runner is surrounding around distribution, therefore divide the material stream that flows into each branch road to have flow velocity speed difference and problem of non-uniform from runner level, material stream can not arrive simultaneously and be full of around the each working of plastics die cavity distributing.Finally flowing in addition the front end material stream of working of plastics die cavity relative temperature is lower to affect the joint strength of working of plastics weld mark, thereby affects intensity and the impact resistance of working of plastics.
Summary of the invention
The object of the present invention is to provide a kind of Shooting Technique and mould of accurate miniature plastic parts, overcome prior art gained working of plastics and exist the joint strength deficiency of weld mark, impact resistance is poor, the uneven problem of quality.
In order to reach above-mentioned purpose, solution of the present invention is:
A kind of Shooting Technique of accurate miniature plastic parts, its technological process is: first material stream flows into sprue from main cast gate, then divide and flow into each runner, vertically flow into the corresponding branch flow channel Zu center mouth that confluxes in the end of each runner through secondary cast gate again, flow in corresponding each working of plastics die cavity finally by each branch road of branch flow channel group.
Described secondary cast gate is toward the pointed cone mouth structure in discharging flow path direction convergent footpath.
Described material is flowed through in described branch road process, and centre flows in the working of plastics die cavity of two correspondences after symmetrical two-way shunting.
An injection mold for accurate miniature plastic parts, offers sprue and the some runners that are connected this sprue in this mould, these some runners are respectively connected with a branch flow channel group; Respectively this branch flow channel group includes some branch roads, and these some branch roads are around distributing and forming the You Yi center mouth that confluxes, and this center mouthful vertical vertical run that connects of confluxing is connected by secondary cast gate between this vertical run and corresponding described runner.
Described secondary cast gate is toward the pointed cone mouth structure in discharging flow path direction convergent footpath.
Described some branch roads are all y-type structure, the each working of plastics die cavity that is communicated with in two symmetrical shunting ends of this y-type structure.
Described mould is divided into upper die and lower die, and described sprue, some runners and branch flow channel group are all located on described upper die and lower die up and down on a fifty-fifty basis, and described vertical run and secondary cast gate are located on described patrix or counterdie.
Adopt after such scheme, the present invention is with respect to the beneficial effect of prior art: when injection moulding, material stream is flowed through after runner, pass through especially secondary cast gate, flow into the branch flow channel Zu center mouth that confluxes with vertical mode, therefore the material stream that conflux mouthful in inflow center evenly past surrounding scatter, flow into equably each branch road of branch flow channel group, thereby material stream finally can be even, side by side arrive and be full of each working of plastics die cavity, thereby the working of plastics of guaranteeing each working of plastics die cavity gained all has excellent dimensional accuracy and uniformity, finished product rate is high, and product performance is more excellent.Further, described secondary cast gate is designed to be the pointed cone mouth structure toward discharging flow path direction convergent footpath, in the constant situation of material flowing pressure, undergauge structure can promote material stream flow velocity, material stream produces shear heat with runner inner wall friction, the material stream front end temperature entering in working of plastics die cavity promotes to some extent, thereby improve the mobility of material stream, and then material stream can be walked around core welding mutually better from both sides, further promote thus the joint strength of the weld mark of working of plastics, improved the impact resistance of working of plastics.
Brief description of the drawings
Fig. 1 is a structural representation of the patrix of injection mold of the present invention;
Fig. 2 is a structural representation of the counterdie of injection mold of the present invention;
Fig. 3 is an embodiment schematic diagram of Shooting Technique gained working of plastics of the present invention;
Fig. 4 is an embodiment schematic diagram of existing Shooting Technique gained working of plastics.
Label declaration
The main cast gate 11 of sprue 1
2 two cast gates 3 of runner
Vertical run 4 branch flow channel groups 5
Mouth 52 confluxes at branch road 51 centers
Working of plastics die cavity 6
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, this case is described in further detail.
This case relates to a kind of injection mold and Shooting Technique of accurate miniature plastic parts, and this injection mold preferably comprises the upper die and lower die that mutual coupling fastens, as shown in Figure 1-2.In mould, offer sprue 1 and the some runners 2 that are connected this sprue 1, these some runners 2 are connected with a branch flow channel group 5 correspondingly, and each branch flow channel group 5 of this sprue 1, some runners 2 and correspondence is all along horizontal-extending setting.Sprue 1 is provided with main cast gate 11.Branch flow channel group 5 comprises some branch roads 51, these some branch roads 51 are around distributing and forming You Yi center and conflux mouthfuls 52, this center mouthfuls 52 vertical vertical run 4 (this vertical run 4 extends longitudinally) that connect of confluxing, are connected (structure of vertical run 4 and secondary cast gate 3 and connected mode can and indicate B referring to the sign A of Fig. 3) by secondary cast gate 3 between this vertical run 4 and corresponding runner 2.Described sprue 1, some runners 2 and corresponding each branch flow channel group 5 preferably arrange in same level face, and the secondary cast gate 3 being connected between vertical run 4 and runner 2 is skewed, form secondary tunnel gate structure.
Its corresponding technological process of described injection mold is as follows: first material stream flows into sprue 1 from main cast gate 11, then divide and flow into each runner 2, pass through secondary cast gate 3 in the end of each runner 2 again, with vertical mode (corresponding above-mentioned mould structure design, pass through vertical run 4 herein, but vertical current to mode be not limited to the frame mode of described vertical run 4) center that flows into corresponding branch flow channel group 5 confluxes mouthfuls 52, flow in corresponding each working of plastics die cavity 6 finally by each branch road 51 of branch flow channel group 5.
The core innovative technology point of mould of the present invention and technique is the design of secondary cast gate 3 and the vertical material stream mode of bringing, thereby conflux in inflow center, the material stream of mouth 52 can vertically scatter equably toward surrounding, can flow into equably each branch road 51 of branch flow channel group 5, thereby material stream finally can evenly, side by side arrive and be full of each working of plastics die cavity 6, thereby the working of plastics of guaranteeing each die cavity 6 gained all has excellent dimensional accuracy and uniformity, finished product rate is high, and product performance is more excellent.
Further, described secondary cast gate 3 is the pointed cone mouth structure (referring to the sign A in Fig. 3) toward discharging flow path direction convergent footpath.In injection moulding process, in the constant situation of material flowing pressure, undergauge structure can promote material stream flow velocity, material stream produces shear heat with runner inner wall friction, the material stream front end temperature entering in working of plastics die cavity 6 promotes to some extent, thereby improves the mobility of material stream, and then material stream can be walked around core welding mutually better from both sides, further promote thus the joint strength of the weld mark of working of plastics, improved the impact resistance of working of plastics.Described cone-shaped secondary cast gate 3 structural designs, are also beneficial to the lock out operation of working of plastics and waste part after the injection moulding demoulding.
Preferably, described branch road 52 is all y-type structure, the each working of plastics die cavity 6 that is communicated with in two symmetrical shunting ends of this y-type structure.Corresponding material is flowed through in branch road 52 processes, and centre flows in the working of plastics die cavity 6 of two correspondences after symmetrical two-way shunting.This kind of structural design of branch road 52 guarantee material stream uniform-flow to prerequisite under, also play and reduce the waste material effect that runner produces.
Described mould is divided into upper die and lower die; molding mode one preferred embodiment of above-mentioned runner on upper die and lower die is; sprue 1, some runners 2 and branch flow channel group 5 are all located on upper die and lower die up and down on a fifty-fifty basis, and vertical run 4 and secondary cast gate 3 are located at (mode that provides in figure is provided in a side of on counterdie) on patrix or counterdie.
The foregoing is only the preferred embodiments of the present invention, all equalizations of doing with the claims in the present invention scope change and modify, and all should belong to the scope of the claims in the present invention.
Claims (7)
1. the Shooting Technique of an accurate miniature plastic parts, it is characterized in that, technological process is: first material stream flows into sprue from main cast gate, then divide and flow into each runner, vertically flow into the corresponding branch flow channel Zu center mouth that confluxes in the end of each runner through secondary cast gate again, flow in corresponding each working of plastics die cavity finally by each branch road of branch flow channel group.
2. the Shooting Technique of a kind of accurate miniature plastic parts as claimed in claim 1, is characterized in that, described secondary cast gate is toward the pointed cone mouth structure in discharging flow path direction convergent footpath.
3. the Shooting Technique of a kind of accurate miniature plastic parts as claimed in claim 1, is characterized in that, described material is flowed through in described branch road process, and centre flows in the working of plastics die cavity of two correspondences after symmetrical two-way shunting.
4. an injection mold for accurate miniature plastic parts, is characterized in that, offers sprue and the some runners that are connected this sprue in this mould, and these some runners are respectively connected with a branch flow channel group; Respectively this branch flow channel group includes some branch roads, and these some branch roads are around distributing and forming the You Yi center mouth that confluxes, and this center mouthful vertical vertical run that connects of confluxing is connected by secondary cast gate between this vertical run and corresponding described runner.
5. the injection mold of a kind of accurate miniature plastic parts as claimed in claim 4, is characterized in that, described secondary cast gate is toward the pointed cone mouth structure in discharging flow path direction convergent footpath.
6. the injection mold of a kind of accurate miniature plastic parts as claimed in claim 4, is characterized in that, described some branch roads are all y-type structure, the each working of plastics die cavity that is communicated with in two symmetrical shunting ends of this y-type structure.
7. the injection molding die of a kind of accurate miniature plastic parts as claimed in claim 4; it is characterized in that; described mould is divided into upper die and lower die; described sprue, some runners and branch flow channel group are all located on described upper die and lower die up and down on a fifty-fifty basis, and described vertical run and secondary cast gate are located on described patrix or counterdie.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410165125.XA CN103963230A (en) | 2014-04-23 | 2014-04-23 | Injection moulding process and mould for precision and minitype plastic piece |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410165125.XA CN103963230A (en) | 2014-04-23 | 2014-04-23 | Injection moulding process and mould for precision and minitype plastic piece |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103963230A true CN103963230A (en) | 2014-08-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410165125.XA Pending CN103963230A (en) | 2014-04-23 | 2014-04-23 | Injection moulding process and mould for precision and minitype plastic piece |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103963230A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108819121A (en) * | 2018-08-01 | 2018-11-16 | 昆山天匠精密模具有限公司 | Automobile grills injection mold |
| CN108973026A (en) * | 2018-02-27 | 2018-12-11 | 深圳明智超精密科技有限公司 | A kind of novel more cave number backlight lens dies |
| CN109249588A (en) * | 2018-08-01 | 2019-01-22 | 深圳明智超精密科技有限公司 | A kind of novel 256 cave backlight lens die of a mould |
| CN110450369A (en) * | 2019-08-27 | 2019-11-15 | 张丽珠 | A kind of palace column key cap mould |
| CN111688118A (en) * | 2019-03-15 | 2020-09-22 | 深圳明智超精密科技有限公司 | One-mold 576-cavity optical lens mold |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN202021770U (en) * | 2011-03-24 | 2011-11-02 | 上海德奎久保田模具有限公司 | X-shaped and H-shaped comprehensive sub-runner structure of injection mould |
| CN202378250U (en) * | 2011-12-22 | 2012-08-15 | 天津金发新材料有限公司 | Plastic spline mould capable of forming multiple convergence angle welding lines |
| CN103496110A (en) * | 2013-09-26 | 2014-01-08 | 高精科技(苏州)有限公司 | Plastic mold of electronic refill |
| CN203831715U (en) * | 2014-04-23 | 2014-09-17 | 福建省石狮市华联服装配件企业有限公司 | Injection mold for small precise plastic parts |
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2014
- 2014-04-23 CN CN201410165125.XA patent/CN103963230A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN202021770U (en) * | 2011-03-24 | 2011-11-02 | 上海德奎久保田模具有限公司 | X-shaped and H-shaped comprehensive sub-runner structure of injection mould |
| CN202378250U (en) * | 2011-12-22 | 2012-08-15 | 天津金发新材料有限公司 | Plastic spline mould capable of forming multiple convergence angle welding lines |
| CN103496110A (en) * | 2013-09-26 | 2014-01-08 | 高精科技(苏州)有限公司 | Plastic mold of electronic refill |
| CN203831715U (en) * | 2014-04-23 | 2014-09-17 | 福建省石狮市华联服装配件企业有限公司 | Injection mold for small precise plastic parts |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108973026A (en) * | 2018-02-27 | 2018-12-11 | 深圳明智超精密科技有限公司 | A kind of novel more cave number backlight lens dies |
| CN108819121A (en) * | 2018-08-01 | 2018-11-16 | 昆山天匠精密模具有限公司 | Automobile grills injection mold |
| CN109249588A (en) * | 2018-08-01 | 2019-01-22 | 深圳明智超精密科技有限公司 | A kind of novel 256 cave backlight lens die of a mould |
| CN111688118A (en) * | 2019-03-15 | 2020-09-22 | 深圳明智超精密科技有限公司 | One-mold 576-cavity optical lens mold |
| CN110450369A (en) * | 2019-08-27 | 2019-11-15 | 张丽珠 | A kind of palace column key cap mould |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20140806 |
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| RJ01 | Rejection of invention patent application after publication |