CN202137926U - Gas-assisted injection molding system - Google Patents
Gas-assisted injection molding system Download PDFInfo
- Publication number
- CN202137926U CN202137926U CN201120204539U CN201120204539U CN202137926U CN 202137926 U CN202137926 U CN 202137926U CN 201120204539 U CN201120204539 U CN 201120204539U CN 201120204539 U CN201120204539 U CN 201120204539U CN 202137926 U CN202137926 U CN 202137926U
- Authority
- CN
- China
- Prior art keywords
- gas
- mould
- air
- mold
- plastic cement
- 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.)
- Expired - Fee Related
Links
Landscapes
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
The utility model relates to a gas-assisted injection molding system, which comprises a mold and a gas feeding device. The mold comprises a front mold and a rear mold, a cavity is formed between the front mold and the rear mold, and a plastic passage communicated with the cavity is arranged on the front mold or the rear mold. The gas feeding device comprises a gas source, a gas pressurizing portion and a gas filling portion in sequential connection, a gas passage communicated with the cavity is arranged on the front mold or the rear mold, and the gas filling portion is positioned inside the gas passage. By means of the gas-assisted injection molding system, the problem of sink marks on surfaces of products can be thoroughly solved, so that the surfaces of the products can be smooth, attractive and plump. In addition, internal stress and warping deformation of the products can be reduced so that the products are stable in size, and accordingly comprehensive performance of the products is evidently improved.
Description
Technical field
The utility model belongs to the injection molding technology field, relates in particular to a kind of air-auxiliary injection forming system.
Background technology
Traditional injecting products is through the moulding in the mold cavity of mechanical energy high-pressure injection with melt plastic cement; This injection moulding process is inappropriate for produces the heavy wall workpiece; This is because the low heat conductivity of plastic cement and higher relatively shrinkage factor cause long work period and serious contraction vestige; Cause the heavy wall surface of goods depression to occur, even make whole goods produce buckling deformation.
The utility model content
The utility model technical problem to be solved is, a kind of air-auxiliary injection forming system that avoids product surface depression, buckling deformation to occur is provided.
For solving the problems of the technologies described above, the utility model provides a kind of air-auxiliary injection forming system, and it comprises mould and inlet duct; Mould comprises front mould and back mould, is provided with die cavity between front mould and the back mould, is provided with the plastic cement passage in front mould or back mould, and the plastic cement passage is connected with die cavity; Inlet duct comprises that the source of the gas, gas boosting part and the gas that link to each other successively inject part, and front mould or back mould are provided with gas passage, and gas passage is connected with die cavity, and gas injects part and is positioned at gas passage.
Further, said gas boosting partly is gas drive formula supercharger or electrodynamic type supercharger.
Further, to inject part be that mould air tube or gas are penetrated and chewed for said gas.
Further, said source of the gas is the inert gas source of the gas.
Further, said inert gas is a nitrogen.
Further, said front mould or back mould are provided with flash groove.
Compared with prior art; Above-mentioned gas assisted injection molding system has increased inlet duct on the basis of existing injection mold; After in mold cavity, injecting melt plastic cement, inlet duct can be directly in the melt plastic cement gases at high pressure of injection certain volume and pressure, gas spreads along a line of least resistance under the encirclement of melt plastic cement and advances; Plastic cement temperature by what pattern wall part is low, surface viscosity is high; And making is low than temperature height, the viscosity of the center melt plastic cement of thickness portion, and therefore, gas penetrates and emptying the center melt plastic cement easily; Thick at goods forms the hollow air flue; And pushed to the mold cavity end until being full of mold cavity by gas pressure by the melt plastic cement of gas institute emptying, and at the cooling stage Compressed Gas melt plastic cement is carried out the pressurize feeding, treat to unload gas again after the goods cooled and solidified, die sinking ejects.Above-mentioned gas auxiliary injection adapted to injection system can thoroughly solve and eliminate product surface shrink mark problem, makes product surface smooth, attractive in appearance, full, can reduce the internal stress and the buckling deformation of goods, makes product size stable, thereby obviously improves the product combination property.
Description of drawings
Fig. 1 is the sketch map of the utility model air-auxiliary injection forming system one preferred embodiment.
Fig. 2 is that gas boosting part among Fig. 1, gas injection part make up sketch map with the part of back mould.
The specific embodiment
In order to make the utility model technical problem to be solved, technical scheme and beneficial effect clearer,, the utility model is further elaborated below in conjunction with accompanying drawing and embodiment.Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.
Seeing also Fig. 1 and Fig. 2, is a preferred embodiment of the utility model, and this air-auxiliary injection forming system comprises mould 1 and inlet duct.Mould 1 comprises front mould 11 and back mould 12; Be provided with die cavity 13 between front mould 11 and the back mould 12; Be provided with plastic cement passage (not shown) in front mould 11 or back mould 12, the plastic cement passage is connected with die cavity 13, is provided with the flash groove (not shown) in front mould 11 or back mould 12.Inlet duct comprises that the source of the gas (not shown), gas boosting part 2 and the gas that link to each other successively inject part 3.Gas boosting part 2 can be gas drive formula supercharger or electrodynamic type supercharger, and it can be that mould air tube or gas are penetrated and chewed that gas injects part 3, and source of the gas is the inert gas source of the gas, wherein, and nitrogen.Front mould 11 or back mould 12 are provided with gas passage 14 (in the present embodiment, gas passage 14 is positioned at back mould 12), and gas passage 14 is connected with die cavity 13, and gas injects part 3 and is positioned at gas passage 14.
The workflow of above-mentioned gas assisted injection molding system when injection moulded products is roughly following:
Be injected into a certain amount of melt plastic cement in mould 1 die cavity 13 according to general injection molding process;
Still before the underfill die cavity 13, gases at high pressure are injected die cavity 13 central authorities in melt plastic cement;
Gases at high pressure promote the not yet cooling melt plastic cement of goods central authorities, until die cavity 13 ends fill up die cavity 13 at last;
The hollow space of plastic parts continues to keep high pressure, and pressure forces plastic cement outwards to be close to mould 1, up to cooling down;
Behind the goods cooling and shaping, get rid of the inner gases at high pressure of goods, goods are taken out in die sinking then.
Above-mentioned gas assisted injection molding system has increased inlet duct on the basis of existing injection mold; After in mould 1 die cavity 13, injecting melt plastic cement, inlet duct can be directly in the melt plastic cement gases at high pressure of injection certain volume and pressure, gas spreads along a line of least resistance under the encirclement of melt plastic cement and advances; Plastic cement temperature by what pattern wall part is low, surface viscosity is high; And making is low than temperature height, the viscosity of the center melt plastic cement of thickness portion, and therefore, gas penetrates and emptying the center melt plastic cement easily; Thick at goods forms the hollow air flue; And pushed to mould 1 die cavity 13 ends until being full of mould 1 die cavity 13 by gas pressure by the melt plastic cement of gas institute emptying, and at the cooling stage Compressed Gas melt plastic cement is carried out the pressurize feeding, treat to unload gas again after the goods cooled and solidified, die sinking ejects.
Above-mentioned gas assisted injection molding system can thoroughly solve and eliminate product surface shrink mark problem, makes product surface smooth, attractive in appearance, full, can reduce the internal stress and the buckling deformation of goods, makes product size stable, thereby obviously improves the product combination property.
The air-auxiliary injection forming system of the utility model can be applicable on the various plastic cement products, like computer, television set or sound equipment shell, automobile plastic cement products, furniture, bathroom, kitchen utensils, household appliances and articles for daily use, all types of plastic box, toy, office equipment or the like.
The above is merely the preferred embodiment of the utility model; Not in order to restriction the utility model; Any modification of being done within all spirit and principles at the utility model, be equal to replacement and improvement etc., all should be included within the protection domain of the utility model.
Claims (6)
1. an air-auxiliary injection forming system comprises mould, and said mould comprises front mould and back mould; Be provided with die cavity between said front mould and the back mould, be provided with the plastic cement passage in front mould or back mould, said plastic cement passage is connected with die cavity; It is characterized in that; Said formation system also comprises inlet duct, and said inlet duct comprises that the source of the gas, gas boosting part and the gas that link to each other successively inject part, and said front mould or back mould are provided with gas passage; Said gas passage is connected with die cavity, and said gas injects part and is positioned at said gas passage.
2. air-auxiliary injection forming as claimed in claim 1 system is characterized in that said gas boosting partly is gas drive formula supercharger or electrodynamic type supercharger.
3. air-auxiliary injection forming as claimed in claim 1 system is characterized in that, it is that mould air tube or gas are penetrated and chewed that said gas injects part.
4. air-auxiliary injection forming as claimed in claim 1 system is characterized in that said source of the gas is the inert gas source of the gas.
5. air-auxiliary injection forming as claimed in claim 4 system is characterized in that said inert gas is a nitrogen.
6. air-auxiliary injection forming injection mold as claimed in claim 1 is characterized in that, said front mould or back mould are provided with flash groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120204539U CN202137926U (en) | 2011-06-16 | 2011-06-16 | Gas-assisted injection molding system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120204539U CN202137926U (en) | 2011-06-16 | 2011-06-16 | Gas-assisted injection molding system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202137926U true CN202137926U (en) | 2012-02-08 |
Family
ID=45549002
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120204539U Expired - Fee Related CN202137926U (en) | 2011-06-16 | 2011-06-16 | Gas-assisted injection molding system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202137926U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105729716A (en) * | 2016-02-02 | 2016-07-06 | 上海精卫模具有限公司 | Multipoint nitrogen charging injection molding technology |
| CN109263081A (en) * | 2017-07-18 | 2019-01-25 | 上海腾为实业有限公司 | A kind of injection member and its mold of gas assisted molding |
-
2011
- 2011-06-16 CN CN201120204539U patent/CN202137926U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105729716A (en) * | 2016-02-02 | 2016-07-06 | 上海精卫模具有限公司 | Multipoint nitrogen charging injection molding technology |
| CN109263081A (en) * | 2017-07-18 | 2019-01-25 | 上海腾为实业有限公司 | A kind of injection member and its mold of gas assisted molding |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202137926U (en) | Gas-assisted injection molding system | |
| CN202079728U (en) | Three-plate injection mould based on hot runner technique | |
| CN109093940A (en) | Plastic lock catch injection forming mold and the Shooting Technique for manufacturing plastic lock catch | |
| CN201115983Y (en) | Tooth form exhaustion core | |
| CN103128924A (en) | Fixed die compressible die | |
| CN203994523U (en) | The multi-cavity plastic mold of enclosing cover easy to break | |
| CN103737805A (en) | Notebook computer base back cover precision mold | |
| CN203805254U (en) | Push rod capable of exhausting | |
| CN109093939A (en) | Register face injection forming mold and the Shooting Technique for manufacturing register face | |
| CN203236675U (en) | Delayed ejection structure for die | |
| CN201863361U (en) | Mold cavity capable of preventing decoration strip product from shrinkage | |
| CN205075256U (en) | Panel is bordured and is glued special injection molding machine | |
| CN211640859U (en) | Double-colored injection device of injection molding machine convenient to demolish screw rod | |
| CN108568497A (en) | A kind of special hot-runner device of high-speed railway rail fastening | |
| CN207758043U (en) | A kind of terminal injection mold | |
| CN201325150Y (en) | An injection mold | |
| CN202702527U (en) | Core-pulling structure used for injection molding of arc-shaped product | |
| CN201833539U (en) | Gas-assisted hollow and in-mould negative pressure vacuum injection molding thin-wall molding technology mould | |
| CN204685953U (en) | For the preparation of the rear end core cold-box of diesel engine mould | |
| CN202781647U (en) | Mold for injection molding | |
| CN205033490U (en) | Injection mold | |
| CN202781643U (en) | Mold positioning column | |
| CN109093964A (en) | Plastics tapered end injection mold and plastics tapered end Shooting Technique | |
| CN202114863U (en) | Injection mould | |
| CN202572840U (en) | Injection molding die for front supporting pad of engine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120208 Termination date: 20140616 |
|
| EXPY | Termination of patent right or utility model |