CN101195267A - Reciprocating compressing and injection molding method of plastic jetting-molding machine - Google Patents
Reciprocating compressing and injection molding method of plastic jetting-molding machine Download PDFInfo
- Publication number
- CN101195267A CN101195267A CNA2007103065830A CN200710306583A CN101195267A CN 101195267 A CN101195267 A CN 101195267A CN A2007103065830 A CNA2007103065830 A CN A2007103065830A CN 200710306583 A CN200710306583 A CN 200710306583A CN 101195267 A CN101195267 A CN 101195267A
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- Prior art keywords
- injection
- mold
- molding method
- injection molding
- molding machine
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Links
- 238000001746 injection moulding Methods 0.000 title claims abstract description 14
- 238000000465 moulding Methods 0.000 title claims abstract description 11
- 239000004033 plastic Substances 0.000 title claims description 11
- 229920003023 plastic Polymers 0.000 title claims description 11
- 238000002347 injection Methods 0.000 claims abstract description 24
- 239000007924 injection Substances 0.000 claims abstract description 24
- 230000006835 compression Effects 0.000 claims abstract description 11
- 238000007906 compression Methods 0.000 claims abstract description 11
- 230000014759 maintenance of location Effects 0.000 claims description 5
- 238000000034 method Methods 0.000 abstract description 17
- 238000005187 foaming Methods 0.000 abstract description 10
- 238000000748 compression moulding Methods 0.000 abstract description 4
- 238000004381 surface treatment Methods 0.000 abstract description 2
- 239000000463 material Substances 0.000 description 6
- 239000006260 foam Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 239000004604 Blowing Agent Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 210000002615 epidermis Anatomy 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 210000003491 skin Anatomy 0.000 description 1
Landscapes
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
Provided is a reciprocating compression molding method of injection molding machines, the steps of which includes: (1) stopping the mold-closing to perform injection when the mold-closing reaches the initial mold-shutting position; (2) movable die plates backing to the position of suction opening mold to stop when an injection screw reaches the screw position of starting compression; (3) performing the mold-locking when the maintaining time of the suction opening mold is over and continuing injecting without stopping during the time when coming to the end of mold-locking position. The invention has the advantages that thin-wall foaming can be effectively realized and the vivid surface treatment is achieved, simultaneously the radial shunt trace of the products with large flow length ratio is avoided, the problem that the product property is twisted resulting from the unable filling and the residual stress of finished products is resolved, not only are the dimensional accuracy and the surface accuracy increased, but also the volume can be continuously changed according to the need of molding space of mold cavity, and as the compression molding method belongs to the category of low-pressure injection, the method is particularly adaptable to the thin-wall foaming technique, thereby largely extending the usage of the injection molding machines.
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.
The compress mode that has occurred in full electric injection molding machine is: non-interlock matched moulds compression injection, interlock matched moulds compression injection, chilling room move back mould etc., but these methods still lack effective counter-measure to occurring situations such as foaming in the forming process, can not well satisfy and produce needs, big stream long than can occur in the product radiation shunting vestige, can't filling and the finished product residual stress cause problems such as product property distortion.
In order to improve the quality of foamed products, prior art must could realize the low head injection function with the special equipment of special manufacturing.
Summary of the invention
Technical problem to be solved by this invention is that a kind of simple, handling good, reciprocating compressing and injection molding method of plastic jetting-molding machine that Forming Quality is high of realizing is provided for the above-mentioned defective that overcomes prior art.
The present invention solves the problems of the technologies described above the technical scheme that is adopted:
Reciprocating compressing and injection molding method of plastic jetting-molding machine is characterized in that: may further comprise the steps:
(1), matched moulds stops matched moulds during to Guan Mo position first, inject;
(2), when injection screw arrives compression beginning screw position, moving platen retreats into and sucks die sinking position and stops;
(3), wait to suck after the die sinking retention time finishes, carry out locked mode, finish to the locked mode position, during, action of injection does not stop continuously.
Because it is very high that above-mentioned forming method requires template position control resolution, especially needs effectively to control in the articulated type matched moulds structure, and carry out in the shuttle motion process in template, action of injection does not stop continuously.On electric injection molding machine, invented the accurate control that utilizes template position, make template carry out relevant action then arriving first Guan Mo position, compression beginning screw position, in time feeding back to controller when sucking each position such as die sinking position, locked mode position.
Compared with prior art, the invention has the advantages that:
By method of the present invention, effectively realize the thin-walled foaming and obtain surface treatment clearly, avoided the radiation shunting vestige of big stream length simultaneously than product, solved can't filling and the finished product residual stress cause the product property distortion problem, not only can improve product size precision and surface accuracy, and because this compression-molding method belongs to the category of low head injection, and can be with the continuous changeable volume of the needs of mould cavity molding space, be specially adapted to the thin-walled foam process, must on the normal injection machine, be achieved with the low head injection function that the special equipment of special manufacturing could be realized before making, thereby expanded the purposes of injector greatly.
The specific embodiment
Below in conjunction with embodiment the present invention is described in further detail.
Reciprocating compressing and injection molding method of plastic jetting-molding machine may further comprise the steps:
(1), matched moulds stops matched moulds during to Guan Mo position first, inject;
(2), when injection screw arrives compression beginning screw position, moving platen retreats into and sucks die sinking position and stops;
(3), wait to suck after the die sinking retention time finishes, carry out locked mode, finish to the locked mode position, during, action of injection does not stop continuously.
The present invention is applicable to expanded material, expanded material need enlarge volume after material is injected into the mould cavity volume makes it have sufficient space to remove foaming and intumescing, waiting then foams finish after once more minimum cylinder volume make its product that forms required shape, can satisfy this requirement fully with the present invention.
Reciprocating compressing and injection molding method of plastic jetting-molding machine specifically is applied in the program control type injection machine, as long as after the following control parameter of input, injection machine will be injected according to setup parameter, can realize this compression-molding method.
Reciprocating type compression ejection formation mainly contains following parameter and forms: Guan Mo position, compression first begins screw position, sucks the die sinking retention time, sucks die sinking position, locked mode position.
Below the manufacturing with speaker illustrates the present invention.
The injection mould cavity pressure of high-pressure foam method adopts and completely annotates mode between 7～15Mpa, and promptly injection shot just in time equals the volume of mould cavity.
Delay time a period of time after the molten mixture of plastics and blowing agent is injected into die cavity, the moving platen of clamping moves a bit of distance backward then, and the dynamic model of mould and cover half are separated a little, and die cavity enlarges, and the plastics in the die cavity begin foaming and intumescing.
Goods cooling back forms fine and close epidermis on its surface, because the foaming and intumescing of plastic melt is subjected to the control of moving platen, therefore, also just can control the thickness of the dense skin of goods.
Above-mentioned injection moulding
Being provided with of each parameter is as follows: the matched moulds position is set to 2mm first, and compression beginning screw position 10mm sucks die sinking position 5mm, makes the material of injection that sufficient foaming space be arranged; Suck retention time 1s, material can be foamed fully, locked mode position 1mm the material compression through foaming, make its moulding, and inner stress is even.
The speaker that obtains conforming to quality requirements by said method.
Moving of above-mentioned moving platen can be whole moving, and also can be that part is mobile makes partial foaming, thereby obtains the goods of different densities.
Claims (2)
1. reciprocating compressing and injection molding method of plastic jetting-molding machine is characterized in that: may further comprise the steps:
(1), matched moulds stops matched moulds during to Guan Mo position first, inject;
(2), when injection screw arrives compression beginning screw position, moving platen retreats into and sucks die sinking position and stops;
(3), wait to suck after the die sinking retention time finishes, carry out locked mode, finish to the locked mode position, during, action of injection does not stop continuously.
2. reciprocating compressing and injection molding method of plastic jetting-molding machine as claimed in claim 1 is characterized in that: described moving platen moves to integral body and moves or part moves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007103065830A CN101195267A (en) | 2007-12-31 | 2007-12-31 | Reciprocating compressing and injection molding method of plastic jetting-molding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007103065830A CN101195267A (en) | 2007-12-31 | 2007-12-31 | Reciprocating compressing and injection molding method of plastic jetting-molding machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101195267A true CN101195267A (en) | 2008-06-11 |
Family
ID=39545984
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007103065830A Pending CN101195267A (en) | 2007-12-31 | 2007-12-31 | Reciprocating compressing and injection molding method of plastic jetting-molding machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101195267A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111421758A (en) * | 2020-04-30 | 2020-07-17 | 贵州省材料产业技术研究院 | High-precision foaming product injection molding method and injection molding machine |
-
2007
- 2007-12-31 CN CNA2007103065830A patent/CN101195267A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111421758A (en) * | 2020-04-30 | 2020-07-17 | 贵州省材料产业技术研究院 | High-precision foaming product injection molding method and injection molding machine |
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| Date | Code | Title | Description |
|---|---|---|---|
| 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 |
|
| 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 |