CN101195266A - Dual compressing and shaping method for plastic jetting-molding machine - Google Patents
Dual compressing and shaping method for plastic jetting-molding machine Download PDFInfo
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- CN101195266A CN101195266A CNA2007103065826A CN200710306582A CN101195266A CN 101195266 A CN101195266 A CN 101195266A CN A2007103065826 A CNA2007103065826 A CN A2007103065826A CN 200710306582 A CN200710306582 A CN 200710306582A CN 101195266 A CN101195266 A CN 101195266A
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- ejecting mechanism
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- Injection Moulding Of Plastics Or The Like (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
Provided is a dual compression molding method of injection molding machines, the steps of which include: (1) performing injection when the mold-closing reaches a certain position; (2) initially compressing products through moving die plates when the injection reaches a certain position; (3) starting the procedure of cooling after the injection and the pressure-keeping is finished, and at the beginning of the cooling, simultaneously pushing a dynamic mold core to a designed position for being kept for a certain period of time to realize recompression of the products through moving forwards an ejection mechanism; (4) the ejection mechanism backing to the final back position of a retaining mold. The invention has the advantages that the invention recompresses the molded products based on injection compression through the interlocking of moving plate compression mode and ejection compression molding mode, thereby effectively improving the surface finish of the molded products and largely increasing the surface quality of the products, and the grade of the whole products is promoted.
Description
Technical field
The present invention relates to a kind of forming method of injection machine.
Background technology
Existing common hydraulic injection molding machine all has only the injection system of injecting again behind the locked mode, this forming method is difficult to accurate control, but need to produce various products in the injection machine real work, quality requirement high product particularly, therefore, this single injecting method is difficult to adapt to actual needs, also is difficult to satisfy the demand of high quality of products.
Full electric injection molding machine makes improvements traditional forming method, non-interlock matched moulds compression injection, interlock injection compress mode, chilling room occur and moved back several compression-molding methods such as mould, injection compression molding particularly, compare with the traditional injection moulding process, the distinguishing feature of injection compression molding is that its mold cavity space can require to adjust automatically according to difference.For example, it can seal the mould targeting part before material does not inject die cavity to some extent, and the twice of part completion wall thickness is then expanded in the die cavity space to.In addition, also can be according to different modes of operation, the size of corresponding control type cavity space makes it to match with injection process during the material injection or after injection finishes, and allows polymer keep suitable pressured state, and reaches the effect that compensative material shrinks.Compare with traditional injection moulding, it is advantageous that bigger streamer length wall thickness ratio; Clamp force and injection pressure can reduce, and make heavy parts on littler injection-moulding device; It also has lower material internal stress, and in the refraction of light, obtain good effect, therefore injection compression molding is applicable to the product that various thermoplasticity engineering plastics are made, as: large-sized curved surface part; thin-walled, microminiaturized part; optical mirror slip, and have good resistance to attack the part that characteristic requires.But this forming method is at the product of production better quality, during as the optical articles of best bright finish more, still can not satisfy the production needs.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of dual compressing and shaping method for plastic jetting-molding machine for the above-mentioned defective that overcomes prior art, and it is higher to achieve simple, handling quality good, shaped article.
The present invention solves the problems of the technologies described above the technical scheme that is adopted:
Dual compressing and shaping method for plastic jetting-molding machine is characterized in that: may further comprise the steps:
Inject when (1), matched moulds is to certain position;
(2), after being expelled to the appropriate location, carry out compressed products first by moving die plate;
(3), after injection, pressurize finish, begin to cool down process, in the cooling beginning, begin to move forward by ejecting mechanism again, promote moving-mould-core and to the position that sets after, keep certain hour, the compression once more of realization product;
(4), ejecting mechanism retreats into the holder mould and moves back final position and put.
Above-mentioned ejecting mechanism moves forward by setting requirement, and the requirement of its setting divides two kinds of situations:
When the pressure that ejects that sets enough makes ejecting mechanism reach the position that sets, keep this position, timing finishes to retreat the rollback final position and puts.
When the power that sets does not enough make ejecting mechanism advance to the position that sets, promptly keep the position that can reach, after timing by the time finishes, retreat into and move back final position and put, control with pressure like this.
The control of above-mentioned moving die plate compression only needs the control to template position.
Above-mentioned dual compressing and shaping method for plastic jetting-molding machine is because need be to the dual control of position and pressure, very high to moving die plate and demoulding guide plate Position Control resolution requirement, therefore the accurate control characteristic by electrical servo realizes Position Control mode and pressure controling mode.
Compared with prior art, the invention has the advantages that:
The present invention is by the moving die plate compress mode and eject compression forming mode interlock, on the basis of injection compression, compress once more, thereby improve the surface smoothness of injecting products effectively, improved surface quality of products greatly, promoted the class of entire product.
The specific embodiment
Below in conjunction with embodiment the present invention is described in further detail.
Below be example with eyeglass production, again dual compressing and shaping method for plastic jetting-molding machine is done detailed description.
Eyeglass has very high requirement for internal stress and surface smoothness, after material is injected into cavity volume, at first utilizes the matched moulds compression function to make material that compression largely be arranged, and makes its uniform internal stress; In the process of cooling, utilize the holder mold pressing to contract then and can further improve its surface quality, improve the surface smoothness of product.
Detailed process is as follows:
Be closed into when also leaving 6～8mm compression clearance at mould, the material of moulding is injected enlarged the mold cavity of certain size, so that overcome initial materials flow resistance.
Mould is closed fully, the mold compound in the compression die cavity, and material can fill up the entire die die cavity fully, and the crosslinked mutually or curing of material component is solidified under the effect of mould temperature.The fiber orientation that the moulding plastic produces at compression stage has been compared significantly with the fiber orientation of carrying out the injection moulding generation in close die and has been reduced.Can guarantee that in this way the molded lenses of producing do not have buckling deformation, no planted agent.
After the complete closure of mould, knock-pin gently ejects forward, promotes moving-mould-core, and material is compressed once more.
Because the power of holder mould motor is less,, holder mould carry should establish smaller value, for example a 3mm so putting; The speed of holder mould advance and retreat and pressure can be provided with according to the needs of specific product and the actual compression effect is adjusted as the difficult compression of the material of fruit product, can be provided with a little pace and big pressure.
Above-mentioned ejecting compressed the goods trace compression once more that makes through the matched moulds compression forming, makes its surface smoothness higher.
Dual compressing and shaping method for plastic jetting-molding machine of the present invention its essence is that moving die plate compresses and eject the combination of compression, for program control type injection machine, as long as the following parameter of input can realize this compression-molding method.
Eject compression forming moving die plate compression and mainly contain following parameter: holder mould carry puts, holds in the palm mould to advance speed, holder mould entrance pressure power, holder mould to advance retention time, holder mould back speed degree, holder mould and move back pressure
Eject compression and moving die plate compression interlock and mainly contain following parameter: Guan Mo position, compression beginning mode (comprising V/P switching point and screw position dual mode), compression delay time, compression first begins screw position.
Carry out according to the following steps:
1, matched moulds arrives Guan Mo position first, and at this moment screw rod begins to inject forward;
2, when screw motion to certain position, template travels forward once more, reaches the locked mode position;
3, after template reaches the locked mode position, the cooling beginning realizes ejecting compression function in the cooling procedure.
Claims (2)
1. dual compressing and shaping method for plastic jetting-molding machine is characterized in that: may further comprise the steps:
Inject when (1), matched moulds is to certain position;
(2), after being expelled to the appropriate location, carry out compressed products first by moving die plate;
(3), after injection, pressurize finish, begin to cool down process, in the cooling beginning, begin to move forward by ejecting mechanism again, promote moving-mould-core and to the position that sets after, keep certain hour, the compression once more of realization product;
(4), ejecting mechanism retreats into the holder mould and moves back final position and put.
2. dual compressing and shaping method for plastic jetting-molding machine as claimed in claim 1 is characterized in that: described ejecting mechanism moves forward by setting requirement, and the requirement of its setting divides two kinds of situations:
When the pressure that ejects that sets enough makes ejecting mechanism reach the position that sets, keep this position, timing finishes to retreat the rollback final position and puts.
When the power that sets does not enough make ejecting mechanism advance to the position that sets, promptly keep the position that can reach, after timing by the time finishes, retreat into and move back final position and put.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007103065826A CN101195266A (en) | 2007-12-31 | 2007-12-31 | Dual compressing and shaping method for plastic jetting-molding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007103065826A CN101195266A (en) | 2007-12-31 | 2007-12-31 | Dual compressing and shaping method for plastic jetting-molding machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101195266A true CN101195266A (en) | 2008-06-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007103065826A Pending CN101195266A (en) | 2007-12-31 | 2007-12-31 | Dual compressing and shaping method for plastic jetting-molding machine |
Country Status (1)
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106158171A (en) * | 2016-06-16 | 2016-11-23 | 天津平高智能电气有限公司 | A kind of manufacture method of compound insulating sleeve |
| CN106827428A (en) * | 2017-01-20 | 2017-06-13 | 北京化工大学 | A kind of new method of injection moulding high-performance conductive or thermal conductive polymer based composites product |
| CN106905699A (en) * | 2016-10-10 | 2017-06-30 | 北京化工大学 | A kind of method that micro-nano accurate construction from part of confinement space prepares high performance polymer base conducing composite material |
| CN113232250A (en) * | 2021-04-20 | 2021-08-10 | 上海龙旗科技股份有限公司 | Battery cover of electronic equipment and processing method |
-
2007
- 2007-12-31 CN CNA2007103065826A patent/CN101195266A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106158171A (en) * | 2016-06-16 | 2016-11-23 | 天津平高智能电气有限公司 | A kind of manufacture method of compound insulating sleeve |
| CN106905699A (en) * | 2016-10-10 | 2017-06-30 | 北京化工大学 | A kind of method that micro-nano accurate construction from part of confinement space prepares high performance polymer base conducing composite material |
| CN106905699B (en) * | 2016-10-10 | 2020-01-21 | 北京化工大学 | Method for preparing polymer-based conductive composite material by limited space micro-nano precise assembly method |
| CN106827428A (en) * | 2017-01-20 | 2017-06-13 | 北京化工大学 | A kind of new method of injection moulding high-performance conductive or thermal conductive polymer based composites product |
| CN106827428B (en) * | 2017-01-20 | 2019-03-01 | 北京化工大学 | A kind of method of injection molding high-performance conductive or thermal conductive polymer based composites product |
| CN113232250A (en) * | 2021-04-20 | 2021-08-10 | 上海龙旗科技股份有限公司 | Battery cover of electronic equipment and processing method |
| CN113232250B (en) * | 2021-04-20 | 2022-11-29 | 上海龙旗科技股份有限公司 | Battery cover of electronic equipment and processing method |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| ASS | Succession or assignment of patent right |
Owner name: NINGBO CHANGFEIYA PLASTICS MACHINE MANUFACTURING Free format text: FORMER OWNER: NINGBO HAITIAN PLASTICS MACHINERY GROUP CO., LTD. Effective date: 20080912 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20080912 Address after: Zhejiang Province, Ningbo City, Beilun Laoshan Road No. 37 Ningbo zhafir Plastics Machinery Manufacturing Co. Ltd. post encoding: 315800 Applicant after: Ningbo Zhafir Plastics Machinery Co., Ltd.? Address before: Post encoding Xiaogang Beilun Jiangnan export processing zone in Zhejiang city of Ningbo Province: 315821 Applicant before: Ningbo Haitian Plastics Machinery Group Co., Ltd. |
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| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Open date: 20080611 |