CN103660205A - Injection exhaust method - Google Patents
Injection exhaust method Download PDFInfo
- Publication number
- CN103660205A CN103660205A CN201310636090.9A CN201310636090A CN103660205A CN 103660205 A CN103660205 A CN 103660205A CN 201310636090 A CN201310636090 A CN 201310636090A CN 103660205 A CN103660205 A CN 103660205A
- Authority
- CN
- China
- Prior art keywords
- injection
- product
- gas
- exhaust
- glue
- 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
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
- B29C45/58—Details
- B29C45/63—Venting or degassing means
Abstract
The invention discloses an injection exhaust method. The method comprises the following steps: carrying medium-speed rubber feeding and then fast rubber feeding for extruding a gas to the trim edge portion of a product structure, and carrying out slow rubber feeding for the buffering exhaust. The method has the following advantages: 1, there is no need to arrange an exhaust groove on a die, so the structure and the appearance of a molded product are not influenced; 2, the weld mark of the molded product produced through the method is not too deep; and 3, different exhaust processes are adopted for multiple segments to discharge the gas generated in the rubber melting process to the edge portion of the product, so an appearance defect of the gas mark left on the surface of the product of present methods is solved.
Description
Technical field
The present invention relates to injection mo(u)lding field, be specifically related to a kind of injection-molded discharge gas method.
Background technology
Injection mo(u)lding is a kind of industrial product modeling method, and in process of production, the material high pressure melting that is heated is injected die cavity, after cooling curing, obtains formed products, and it is applicable to the batch production of complex-shaped parts.Injection mo(u)lding can be divided into injection mo(u)lding die pressing and casting die, and raw material is generally rubber or plastics.
In the injection mo(u)lding process of prior art, the mode that multiple spot enters glue can produce melten gel gas at melten gel binding site, after moulding, at product surface, leaves gas trace.In order to overcome the above problems, common process method is: the air drain that 1, begins to rehearse on mould, but air discharge duct can affect product structure and outward appearance; 2, in process, adopt and enter at a slow speed glue, the gas that melten gel process is produced is slowly discharged, but can cause like this weld mark of shaped article excessively dark.
Summary of the invention
The defect that the present invention causes to product appearance in order to solve the method for prior art, provides a kind of more reasonably injection-molded discharge gas method.
The present invention is achieved by the following technical solutions: a kind of injection-molded discharge gas method, comprises following content: in injection molding process, first with middling speed, enter glue, again with entering fast glue, edge by gas extrusion to product structure, then with entering at a slow speed glue, buffering exhaust.
The invention has the beneficial effects as follows: 1, the method for the present invention air drain that need to not begin to rehearse on mould, can not have influence on structure and the outward appearance of shaped article; The weld mark of the shaped article that 2, method of the present invention is produced is more shallow; 3, the present invention adopts the different method for exhausting of multistage, and the gas that melten gel process is produced drains into product edge position, thereby solved existing method for exhausting, leaves the open defect of gas trace at product surface.
The specific embodiment
The invention provides a kind of injection-molded discharge gas method, comprise following content: in injection molding process, first with middling speed, enter glue, then with entering fast glue, the edge by gas extrusion to product structure, then with entering at a slow speed glue, buffering exhaust.
For example, in electric cooker shell injection moulding production process, injection screw position 190-140, enters glue with 50% middling speed of nominal injection volume; Injection screw position 140-40, enters glue fast with 85% of nominal injection volume; Injection screw position 40-20, enters at a slow speed glue with 20% of nominal injection volume.
The electric cooker injection casing surface that the method is produced is without gas trace, welds trace more shallow, and outward appearance and structure are more attractive in appearance.
Finally should be noted that; above content is only in order to illustrate technical scheme of the present invention; but not limiting the scope of the invention; the simple modification that those of ordinary skill in the art carries out technical scheme of the present invention or be equal to replacement, does not all depart from essence and the scope of technical solution of the present invention.
Claims (1)
1. an injection-molded discharge gas method, is characterized in that comprising following content: in injection molding process, glue enters with middling speed in elder generation, then with entering fast glue, the edge by gas extrusion to product structure, then with entering at a slow speed glue, buffering exhaust.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310636090.9A CN103660205A (en) | 2013-12-03 | 2013-12-03 | Injection exhaust method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310636090.9A CN103660205A (en) | 2013-12-03 | 2013-12-03 | Injection exhaust method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103660205A true CN103660205A (en) | 2014-03-26 |
Family
ID=50299576
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310636090.9A Pending CN103660205A (en) | 2013-12-03 | 2013-12-03 | Injection exhaust method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103660205A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56122657A (en) * | 1980-03-03 | 1981-09-26 | Asmo Co Ltd | Middle-and high-pressure two-stage injection casting method and casting machine |
| US4660620A (en) * | 1982-06-25 | 1987-04-28 | Toshiba Kikai Kabushiki Kaisha | Arrangement for controlling an injection process of a die casting machine |
| US5906777A (en) * | 1994-03-24 | 1999-05-25 | Fanuc Ltd | Injection molding control method for an injection molding machine |
| CN102205594A (en) * | 2011-05-11 | 2011-10-05 | 慈溪市盛艺模具有限公司 | Steam type highlight and traceless injection-molding and forming process for complex precise product |
-
2013
- 2013-12-03 CN CN201310636090.9A patent/CN103660205A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56122657A (en) * | 1980-03-03 | 1981-09-26 | Asmo Co Ltd | Middle-and high-pressure two-stage injection casting method and casting machine |
| US4660620A (en) * | 1982-06-25 | 1987-04-28 | Toshiba Kikai Kabushiki Kaisha | Arrangement for controlling an injection process of a die casting machine |
| US5906777A (en) * | 1994-03-24 | 1999-05-25 | Fanuc Ltd | Injection molding control method for an injection molding machine |
| CN102205594A (en) * | 2011-05-11 | 2011-10-05 | 慈溪市盛艺模具有限公司 | Steam type highlight and traceless injection-molding and forming process for complex precise product |
Non-Patent Citations (2)
| Title |
|---|
| 梁锦雄等: "《注塑机操作与成型工艺》", 31 January 2006, 机械工业出版社 * |
| 温耀贤: "《塑料注射成型技术（高级工）》", 31 August 2007, 机械工业出版社 * |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20140326 |