JPS56101837A - Injection molding method for product - Google Patents
Injection molding method for productInfo
- Publication number
- JPS56101837A JPS56101837A JP460580A JP460580A JPS56101837A JP S56101837 A JPS56101837 A JP S56101837A JP 460580 A JP460580 A JP 460580A JP 460580 A JP460580 A JP 460580A JP S56101837 A JPS56101837 A JP S56101837A
- Authority
- JP
- Japan
- Prior art keywords
- product
- hole
- core
- injection
- mold
- 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
Links
Landscapes
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
PURPOSE: To enable manufacturing of a product having no hole and a product having a hole, which leave no core mark and have a smooth surface, using the same molds, by a method wherein injection-molding is performed through the formation of a gap between a frame for forming a hole part and a mold.
CONSTITUTION: Through replacement of a core 3, a product 4a having a hole and a product having no hole are injection-molded using the same molds 1 and 2. In said injection molding, and when injection-molding the product having a hole, a gap 6 of 0.1W0.2mm is provided between the surface of the one mold and the end of the core 3 for injection-molding. Burrs at the hole part are removed by inserting a jig being of the size of the core 3. The core 3 is in no direct contact with the mold 1, and thereby no frame mark is left in the mold (1) surface. Where the product having no hole is injection-molded by removing the core 3, the product having no hole, which has no core mark left in the surface and has a smooth surface, can be obtained.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP460580A JPS56101837A (en) | 1980-01-21 | 1980-01-21 | Injection molding method for product |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP460580A JPS56101837A (en) | 1980-01-21 | 1980-01-21 | Injection molding method for product |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS56101837A true JPS56101837A (en) | 1981-08-14 |
Family
ID=11588665
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP460580A Pending JPS56101837A (en) | 1980-01-21 | 1980-01-21 | Injection molding method for product |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS56101837A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4980115A (en) * | 1987-05-28 | 1990-12-25 | Yoshida Industry Co. Ltd. | Method for making an injection-molded product having a partly thin portion |
-
1980
- 1980-01-21 JP JP460580A patent/JPS56101837A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4980115A (en) * | 1987-05-28 | 1990-12-25 | Yoshida Industry Co. Ltd. | Method for making an injection-molded product having a partly thin portion |
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