CN101293394B - Injection molding technique and apparatus for improving production efficiency - Google Patents
Injection molding technique and apparatus for improving production efficiency Download PDFInfo
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- CN101293394B CN101293394B CN2007100088968A CN200710008896A CN101293394B CN 101293394 B CN101293394 B CN 101293394B CN 2007100088968 A CN2007100088968 A CN 2007100088968A CN 200710008896 A CN200710008896 A CN 200710008896A CN 101293394 B CN101293394 B CN 101293394B
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- barrel
- screw rod
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- plastic melt
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Abstract
The invention relates to an injection molding technique for improving the manufacture efficiency and a device thereof, which mainly includes that after compounding a die, a screw in the material cylinder of an injection molding machine moves forwards to press a plastic fused mass in the material cylinder into the die cavity of the die to finish the stage of mold filling; a pressure device is used for applying pressure to the plastic fused mass near the location of a nozzle in the material cylinder from the side surface of the material cylinder to finish the stages of increasing density and maintaining pressure; the pressure device stops applying pressure and the screw moves forwards again to circularly carry out next injection. The invention creatively adopts the pressure device independent from a main screw to finish the stages of increasing density and maintaining pressure, thus leading the two stages of increasing density and maintaining pressure to be carried out simultaneously; thereby saving the time consumed by one of the two stages and greatly improving the manufacture efficiency.
Description
Technical field
The present invention relates to the moulding process of working of plastics, specifically be meant a kind of injection molding process of enhancing productivity and device.
Background technology
Usually, injection molding process comprises mold filling, density pressurize, feed back and cooling three phases.Plastic melt is exerted pressure by screw rod in barrel, is injected into the die cavity of mould from nozzle, and in the process that screw rod advances, plastic melt is full of whole die cavity gradually, and this stage is the mold filling stage.After plastic melt was full of whole die cavity, screw rod moved on, and remained on final position a period of time, and this process is density and packing stage, and its main purpose is to make moulding more closely knit and have certain intensity.Then, screw rod rotates while returning, and makes plastic grain in the spiral slot of screw rod becomes the barrel space that plastic melt enters screw rod the place ahead, for the injection moulding of next moulding is got the raw materials ready, plastic melt cooling curing in the die cavity becomes moulding simultaneously, and this stage is feed back and cooling stage.
This shows that above-mentioned three phases carries out successively, the used time of whole technology equals the summation of used time of three phases.If only from the process conditions aspect, density pressurize and feed back and cool off these two stages and can carry out simultaneously can save time so widely, but since three phases finish by same screw rod, therefore each stage can't carry out simultaneously, thereby production efficiency is relatively low.
Summary of the invention
The invention provides a kind of injection molding process of enhancing productivity and device, its main purpose is to overcome existing injection molding process owing to adopt a screw rod to finish the shortcoming that the whole process time is grown, production efficiency is low that mold filling, density pressurize, three steps of feed back cause.
The present invention adopts following technical scheme: a kind of injection molding process of enhancing productivity may further comprise the steps: 1) behind matched moulds, the screw rod in the injection moulding machine barrel advances, and the plastic melt in the barrel is pressed into the die cavity of mould, finishes the mold filling stage; 2) in the screw rod feed back, with a pressure apparatus from the barrel side in barrel the plastic melt of nearly nozzle location exert pressure, finish the density packing stage; 3) pressure apparatus stops to exert pressure, and screw rod advances once more, and injection moulding is next time carried out in circulation.
Aforementioned a kind of injection molding process of enhancing productivity at the screw rod feed back, when pressure apparatus is exerted pressure, prevents that by a check valve plastic melt from refluxing in the nearly nozzle location in screw rod the place ahead in barrel.
A kind of injection molding apparatus of enhancing productivity comprises: mould, have the die cavity that is used for the moulding moulding, and be communicated with this die cavity so as in die cavity the injection port of injection of plastic melt; Barrel, have a pair of quasi-mode tool injection port and can be in its die cavity the nozzle of injection of plastic melt, be provided with the screw rod that injection pressure is provided and carries out feed back in the barrel; Check valve is located in the barrel, and barrel is divided into ante-chamber and back cavity, and its back cavity is the stroke range of screw rod, and described nozzle is positioned at the leading section of this ante-chamber, and this check valve only allows the plastic melt in the barrel to enter ante-chamber by back cavity; Pressure apparatus is located at the sidewall of above-mentioned barrel ante-chamber, is used for when the screw rod feed back plastic melt in the ante-chamber being exerted pressure to realize that the working of plastics in the mold cavity is carried out the density pressurize.
By the above-mentioned description of this invention as can be known, compare with prior art, the present invention has following advantage: overcome and only adopted a screw rod to finish the mold filling of Shooting Technique, density pressurize, the thinking inertia in feed back stage in the industry, and creatively adopt a pressure apparatus that is independent of driving screw to finish the density packing stage, these two stages of density pressurize and feed back are carried out simultaneously, thereby saved the time that one of them stage consumes, improved production efficiency greatly.
Description of drawings
Fig. 1 is the structural representation of apparatus of the present invention;
Fig. 2 is a process flow diagram of the present invention.
The specific embodiment
Below with reference to Fig. 1 and Fig. 2 the specific embodiment of the present invention is described.
Present embodiment provides a kind of injection molding process that can enhance productivity greatly and device.With reference to Fig. 1, this injection molding apparatus comprises mould 5, barrel, check valve 4, pressure apparatus 3.Mould 5 has the die cavity 50 that is used for the moulding moulding, and be communicated with this die cavity 50 so as in die cavity 50 injection port 501 of injection of plastic melt.Barrel does not show in Fig. 1, and it mainly acts on identical with general injection moulding machine, mainly is to be used for charging, melt and injection.This barrel have a pair of quasi-mode tool 5 injection port 501 and can be in its die cavity 50 nozzle 2 of injection of plastic melt, also be provided with the screw rod 1 that injection pressure is provided and carries out feed back in the barrel.When this screw rod 1 advances, the plastic melt in its place ahead can be injected in the die cavity 50 of mould 5 by nozzle 2, injection port 501, when this screw rod 1 retreats, rotate simultaneously, plastic melt can enter the fore-end of this screw rod, the i.e. process of feed back by the helical duct of screw rod 1 perisporium.
With reference to Fig. 2, this injection molding process mainly may further comprise the steps:
One, behind mould 5 matched moulds, the screw rod 1 in the injection moulding machine barrel advances, and the plastic melt in the barrel is pressed into the die cavity 50 of mould 5, finishes the mold filling stage (step S1).
Two, in screw rod 1 feed back (step S3), with pressure apparatus 3 from the barrel side in barrel the plastic melt of nearly nozzle 2 positions exert pressure, finish density packing stage (step S2).At screw rod 1 feed back, when pressure apparatus 3 is exerted pressure, can prevent that plastic melt from refluxing by check valve 4.
Three, pressure apparatus 3 stops to exert pressure, and screw rod 1 advances once more, and injection moulding is next time carried out in circulation.
Above-mentioned only is a specific embodiment of the present invention, but design concept of the present invention is not limited thereto, and allly utilizes this design that the present invention is carried out the change of unsubstantiality, all should belong to the behavior of invading protection domain of the present invention.
Claims (2)
1. injection molding process of enhancing productivity may further comprise the steps:
1) behind matched moulds, the screw rod in the injection moulding machine barrel advances, and the plastic melt in the barrel is pressed into the die cavity of mould, finishes the mold filling stage;
2) in the screw rod feed back, with a pressure apparatus from the barrel side in barrel the plastic melt of nearly nozzle location exert pressure, finish the density packing stage; At the screw rod feed back, when pressure apparatus is exerted pressure, in barrel, prevent that by a check valve plastic melt from refluxing in the nearly nozzle location in screw rod the place ahead;
3) pressure apparatus stops to exert pressure, and screw rod advances once more, and injection moulding is next time carried out in circulation.
2. injection molding apparatus of enhancing productivity is characterized in that comprising:
Mould has the die cavity that is used for the moulding moulding, and be communicated with this die cavity so as in die cavity the injection port of injection of plastic melt;
Barrel, have a pair of quasi-mode tool injection port and can be in its die cavity the nozzle of injection of plastic melt, be provided with the screw rod that injection pressure is provided and carries out feed back in the barrel;
Check valve is located in the barrel, and barrel is divided into ante-chamber and back cavity, and its back cavity is the stroke range of screw rod, and described nozzle is positioned at the leading section of this ante-chamber, and this check valve only allows the plastic melt in the barrel to enter ante-chamber by back cavity;
Pressure apparatus is located at the sidewall of above-mentioned barrel ante-chamber, is used for when the screw rod feed back plastic melt in the ante-chamber being exerted pressure to realize that the working of plastics in the mold cavity is carried out the density pressurize.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100088968A CN101293394B (en) | 2007-04-23 | 2007-04-23 | Injection molding technique and apparatus for improving production efficiency |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100088968A CN101293394B (en) | 2007-04-23 | 2007-04-23 | Injection molding technique and apparatus for improving production efficiency |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101293394A CN101293394A (en) | 2008-10-29 |
| CN101293394B true CN101293394B (en) | 2010-06-09 |
Family
ID=40064056
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007100088968A Expired - Fee Related CN101293394B (en) | 2007-04-23 | 2007-04-23 | Injection molding technique and apparatus for improving production efficiency |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101293394B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1508707A (en) * | 1975-06-02 | 1978-04-26 | Ex Cell O Corp | Apparatus for making a foamed plastics material |
| US5266247A (en) * | 1990-05-24 | 1993-11-30 | Komatsu Ltd. | Molding cycle control method of an injection molder |
| CN2609745Y (en) * | 2003-05-08 | 2004-04-07 | 甘国工 | Injection device of injection machine with feed supplement pressure maintaining and pressurization mechanism |
| CN2887574Y (en) * | 2005-09-07 | 2007-04-11 | 佛山市顺德区声凯塑料机械有限公司 | Improved injecting and pressure-keeping structure of injection moulding machine |
-
2007
- 2007-04-23 CN CN2007100088968A patent/CN101293394B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1508707A (en) * | 1975-06-02 | 1978-04-26 | Ex Cell O Corp | Apparatus for making a foamed plastics material |
| US5266247A (en) * | 1990-05-24 | 1993-11-30 | Komatsu Ltd. | Molding cycle control method of an injection molder |
| CN2609745Y (en) * | 2003-05-08 | 2004-04-07 | 甘国工 | Injection device of injection machine with feed supplement pressure maintaining and pressurization mechanism |
| CN2887574Y (en) * | 2005-09-07 | 2007-04-11 | 佛山市顺德区声凯塑料机械有限公司 | Improved injecting and pressure-keeping structure of injection moulding machine |
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| Publication number | Publication date |
|---|---|
| CN101293394A (en) | 2008-10-29 |
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| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
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| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: XIAMEN WDI TECHNOLOGY CO., LTD. Assignor: Li Feiyu Contract record no.: 2012350000026 Denomination of invention: Injection molding technique and apparatus for improving production efficiency Granted publication date: 20100609 License type: Exclusive License Open date: 20081029 Record date: 20120321 |
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| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100609 Termination date: 20140423 |