CN102328405A - Mechanism for preventing 'vacuumizing' in ejection process in injection mould - Google Patents
Mechanism for preventing 'vacuumizing' in ejection process in injection mould Download PDFInfo
- Publication number
- CN102328405A CN102328405A CN201110301220A CN201110301220A CN102328405A CN 102328405 A CN102328405 A CN 102328405A CN 201110301220 A CN201110301220 A CN 201110301220A CN 201110301220 A CN201110301220 A CN 201110301220A CN 102328405 A CN102328405 A CN 102328405A
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- CN
- China
- Prior art keywords
- air inlet
- vacuumizing
- injection moulding
- push rod
- injection
- 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.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 9
- 238000002347 injection Methods 0.000 title abstract description 10
- 239000007924 injection Substances 0.000 title abstract description 10
- 230000001360 synchronised effect Effects 0.000 claims 1
- 238000001746 injection moulding Methods 0.000 abstract description 13
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 229920003023 plastic Polymers 0.000 abstract description 6
- 238000000465 moulding Methods 0.000 abstract description 2
- 238000001816 cooling Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 229920002457 flexible plastic Polymers 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The invention relates to a mechanism for preventing 'vacuumizing' in an ejection process in an injection mould. The mechanism prevents the hollow phenomenon during ejection by arranging an air inlet ejector rod in a hollow shell product, and is suitable for the mould forming structure of a soft plastic shell product with a thin wall, a high cavity and a small demoulding gradient. Through the invention, the traditional 'vacuumizing' phenomenon which is avoided by adjusting the injection moulding process is overcome, wherein an air inlet ejector rod mechanism is added, and repeated adjustment of the flow of the injection moulding process is not required, so that the injection moulding production process is simple and easy to control, the moulding period is shortened, the production efficiency is improved, and the production cost is obviously lowered.
Description
Technical field
What the present invention relates to is mechanical design field, the Injection Mold Design classification of affiliated technological equipment design specialist.
Background technology
At present for occurring the solution that " vacuumizing " phenomenon takes place in the injection moulding process, mostly be through prolonging the injection moulding dwell time, ejecting or reduce the speed of ejecting and wait and avoid substandard product quantity through cooling effect, the time-delay that improves injection mold dynamic model side cooling system.There is following shortcoming in this solution: because Shooting Technique receives the influence of various factors, need repeat fine setting, change Shooting Technique, waste time and energy, reduced speed of production, and the production process debugging be loaded down with trivial details, cost of idleness.
Summary of the invention
The present invention is a kind of mechanism that prevents to occur when plastic products from ejecting " vacuumizing " phenomenon in injection moulding process, makes simple, easy to control, the easy debugging of injection moulding process.
The present invention is applicable to the hollow housing class plastic products mould structure that flexible plastic, small walled, high die cavity, little draw taper, suitable push pedal eject.
As shown in Figure 1, the flexible plastic shell products of thin-walled is in the process of ejecting, and big, the easy top of distortion is split; Higher die cavity and little draw taper are prone to make when ejecting and form vacuum in the hollow housing; The goods sidewall can inwardly be shunk by atmospheric pressure moment; This moment, goods can produce the big power of holding tightly to dynamic mould core, continued to eject this moment and can damage goods, so that can not realize continuous injection moulding process.
As shown in Figure 2; Hollow housing based article mould structure sketch map; Draw taper is less relatively for this based article, and the surface quality after the injection mold surface finish is than higher, when in injection moulding process, ejecting in addition; The moment of goods shrinks and very easily can make hollow housing inside vacuum phenomenon occur, continues like this to eject can make product produce moderate finite deformation or product is pushed up to split.For preventing the generation of this situation, contrasting air inlet push rod part sketch map shown in Figure 3 can find, is being designed with 8 place's air inlet ducts apart from place, push rod top; Like this when product ejects about 3mm; Air will get in the cavity, has resisted the generation of hollow phenomenon, has realized working continuously of injection moulding process.
The mold work process:
With being installed on the injection machine behind the mould matched moulds, behind the completion injection moulding process, under the effect of cooling recirculation system, plastic is the cooling curing moulding in mold cavity.During die sinking, quiet mould partial fixing is on the quiet die holder plate of injection machine.Move behind the dynamic model servo-actuated die holder plate, when dynamic model partly moved to desired location, the injection machine push rod promoted push pedal and moves, and push pedal this moment promotes plastic and steadily breaks away from dynamic mould core, after being pushed into desired location, took off plastic by hand.The injection machine push rod resets during matched moulds, and the air inlet push rod at dynamic model center resets under the effect of spring, and when matched moulds arrived certain position, the moving push pedal of quiet mould thruster resetted, and begins to get into next injection molding cycle behind the matched moulds.Go round and begin again like this, accomplish continuous injection moulding production.
The die sinking of mould, to eject, take off the goods state as shown in Figure 4.
Description of drawings
Fig. 1 is a hollow housing based article generalized section;
Fig. 2 is a hollow housing goods mould structure sketch map;
Figure number explanation: 1, hollow housing goods, 2, dynamic mould core, 3, the air inlet push rod, 4, spring, 5, push pedal.
Fig. 3 is an air inlet push rod part sketch map;
Fig. 4 is that goods eject view.
Claims (2)
1. one kind is applicable to the mechanism that prevents to occur in the hollow housing based article forming process " vacuumizing ", and the air inlet push rod is synchronized with the movement with the goods ejecting mechanism and realizes the air inlet principle.
2. according to claim
1Described air inlet post rod mechanism is characterized in that: the air inlet push rod ejects in the goods process with push pedal, is being designed with 8 place's air inlet ducts apart from place, push rod top, and when the about 3mm of air inlet push rod motion, air can get into the hollow die cavity, has resisted the generation of hollow phenomenon.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110301220A CN102328405A (en) | 2011-10-09 | 2011-10-09 | Mechanism for preventing 'vacuumizing' in ejection process in injection mould |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110301220A CN102328405A (en) | 2011-10-09 | 2011-10-09 | Mechanism for preventing 'vacuumizing' in ejection process in injection mould |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102328405A true CN102328405A (en) | 2012-01-25 |
Family
ID=45480497
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110301220A Pending CN102328405A (en) | 2011-10-09 | 2011-10-09 | Mechanism for preventing 'vacuumizing' in ejection process in injection mould |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102328405A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105058725A (en) * | 2015-07-21 | 2015-11-18 | 芜湖市恒峰科技有限公司 | Food recycle box injection mould |
| CN106393588A (en) * | 2016-11-17 | 2017-02-15 | 南京华格电汽塑业有限公司 | Push plate and air poppet valve injection mold |
| CN109159384A (en) * | 2018-09-20 | 2019-01-08 | 深圳市捷讯实业发展有限公司 | Accurate automobile grills mold weldless trace injection structure |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000037232A1 (en) * | 1998-12-18 | 2000-06-29 | Filter Technology Australia Pty. Limited | A filter cartridge and process |
| EP0954424B1 (en) * | 1996-12-04 | 2003-09-10 | Volvo Lastvagnar Ab | Method and device for manufacturing a hollow plastic component |
| CN200939670Y (en) * | 2006-08-25 | 2007-08-29 | 佛山市顺德区汉达精密电子科技有限公司 | Exhaust nosespike structure |
| CN101314252A (en) * | 2008-07-18 | 2008-12-03 | 宁波跃飞模具有限公司 | Time-delay drawing protection technical apparatus for injection mold slide block thimble and inclined jacking block thimble |
-
2011
- 2011-10-09 CN CN201110301220A patent/CN102328405A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0954424B1 (en) * | 1996-12-04 | 2003-09-10 | Volvo Lastvagnar Ab | Method and device for manufacturing a hollow plastic component |
| WO2000037232A1 (en) * | 1998-12-18 | 2000-06-29 | Filter Technology Australia Pty. Limited | A filter cartridge and process |
| CN200939670Y (en) * | 2006-08-25 | 2007-08-29 | 佛山市顺德区汉达精密电子科技有限公司 | Exhaust nosespike structure |
| CN101314252A (en) * | 2008-07-18 | 2008-12-03 | 宁波跃飞模具有限公司 | Time-delay drawing protection technical apparatus for injection mold slide block thimble and inclined jacking block thimble |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105058725A (en) * | 2015-07-21 | 2015-11-18 | 芜湖市恒峰科技有限公司 | Food recycle box injection mould |
| CN106393588A (en) * | 2016-11-17 | 2017-02-15 | 南京华格电汽塑业有限公司 | Push plate and air poppet valve injection mold |
| CN109159384A (en) * | 2018-09-20 | 2019-01-08 | 深圳市捷讯实业发展有限公司 | Accurate automobile grills mold weldless trace injection structure |
| CN109159384B (en) * | 2018-09-20 | 2023-06-13 | 深圳市捷讯实业发展有限公司 | No weld mark injection structure of accurate car grid mould |
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Legal Events
| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120125 |
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| WD01 | Invention patent application deemed withdrawn after publication |