JPS55159949A - Forming mehod for article of injection forming type - Google Patents
Forming mehod for article of injection forming typeInfo
- Publication number
- JPS55159949A JPS55159949A JP6742379A JP6742379A JPS55159949A JP S55159949 A JPS55159949 A JP S55159949A JP 6742379 A JP6742379 A JP 6742379A JP 6742379 A JP6742379 A JP 6742379A JP S55159949 A JPS55159949 A JP S55159949A
- Authority
- JP
- Japan
- Prior art keywords
- forming
- mold
- convexes
- wall
- article
- 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)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
PURPOSE: To prevent the generation of indents on the surface of a formed article, damaging the exterior view of the article, owing to a gas remaining in a mold by a method wherein fine concaves and convexes are formed on the surface of the wall of the molding cavity of a metal mold and forming is performed under such low forming pressure as applied in the foamed forming.
CONSTITUTION: By using a metal-mold cavity wherein fine concaves and convexes are formed on the surface of the wall of a metal mold and a virtually-continuous space allowing a gas to move is secured between the wall surface of the metal mold and the injected synthetic resin, synthetic resin is formed under the forming pressure of 100kg/cm2 or less. Since the pressure of the synthetic resin pressing the surface of the wall of the mold constituting the cavity is comparatively low, the gas easily moves and flows out of the mold and thus inferior forming is prevented. The fine concaves and convexes on the wall surface of the metal mold are required to have 0.1W50μm of the upper-part diameter, height or depth, and the distance between neighboring convexes or concaves.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6742379A JPS55159949A (en) | 1979-06-01 | 1979-06-01 | Forming mehod for article of injection forming type |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6742379A JPS55159949A (en) | 1979-06-01 | 1979-06-01 | Forming mehod for article of injection forming type |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS55159949A true JPS55159949A (en) | 1980-12-12 |
Family
ID=13344480
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6742379A Pending JPS55159949A (en) | 1979-06-01 | 1979-06-01 | Forming mehod for article of injection forming type |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS55159949A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5506190A (en) * | 1992-03-25 | 1996-04-09 | Sagami Chemical Research Center | Tetrahydrophthalamide derivative, intermediate for producing the same, production of both, and herbicide containing the same as active ingredient |
| JP2015085884A (en) * | 2013-11-01 | 2015-05-07 | 豊田合成株式会社 | Resin molding |
| CN106217699A (en) * | 2016-07-22 | 2016-12-14 | 深圳天珑无线科技有限公司 | Casting mold |
-
1979
- 1979-06-01 JP JP6742379A patent/JPS55159949A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5506190A (en) * | 1992-03-25 | 1996-04-09 | Sagami Chemical Research Center | Tetrahydrophthalamide derivative, intermediate for producing the same, production of both, and herbicide containing the same as active ingredient |
| US5554581A (en) * | 1992-03-25 | 1996-09-10 | Sagami Chemical Research Center | Tetrahydrophthalamide derivative, intermediate for producing the same, production of both, and herbicide containing the same as active ingredient |
| JP2015085884A (en) * | 2013-11-01 | 2015-05-07 | 豊田合成株式会社 | Resin molding |
| CN106217699A (en) * | 2016-07-22 | 2016-12-14 | 深圳天珑无线科技有限公司 | Casting mold |
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