JPS5640516A - Forming method of plastic sheet - Google Patents
Forming method of plastic sheetInfo
- Publication number
- JPS5640516A JPS5640516A JP11602179A JP11602179A JPS5640516A JP S5640516 A JPS5640516 A JP S5640516A JP 11602179 A JP11602179 A JP 11602179A JP 11602179 A JP11602179 A JP 11602179A JP S5640516 A JPS5640516 A JP S5640516A
- Authority
- JP
- Japan
- Prior art keywords
- plastic sheet
- sheet
- die
- thickness
- shape
- 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)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
Abstract
PURPOSE: To produce a formed product of plastic sheet having a thick bottom part by a method wherein the plastic sheet is deformed more than a specified shape and then the dies are deformed to a specified shape.
CONSTITUTION: When the plastic sheet 1 is deep drawn to a cylindrical shape, the plastic sheet 1 is clamped by the forming die 14 and the pressing member 15, heated and then a part of the forming die 14, i.e. a bottom 16 is moved outwardly, air pressure is fed from upper part of the die, then the sheet is bulged out into the die to a desired shape of a reverse doom 1a. A thickness of the sheet is generally thin, but has substantially a uniform thickness. Then, the bottom part 16 is moved upwardly to a desired position and the bottom surface corner 17 can be formed without decreasing the thickness.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11602179A JPS5640516A (en) | 1979-09-10 | 1979-09-10 | Forming method of plastic sheet |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11602179A JPS5640516A (en) | 1979-09-10 | 1979-09-10 | Forming method of plastic sheet |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5640516A true JPS5640516A (en) | 1981-04-16 |
Family
ID=14676815
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11602179A Pending JPS5640516A (en) | 1979-09-10 | 1979-09-10 | Forming method of plastic sheet |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5640516A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5169569A (en) * | 1991-08-05 | 1992-12-08 | Richard Ingram | Method of making a one-piece intraocular lens |
JPH05124095A (en) * | 1991-10-31 | 1993-05-21 | Sumitomo Chem Co Ltd | Compressed air molding method with undercut of synthetic resin plate |
-
1979
- 1979-09-10 JP JP11602179A patent/JPS5640516A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5169569A (en) * | 1991-08-05 | 1992-12-08 | Richard Ingram | Method of making a one-piece intraocular lens |
JPH05124095A (en) * | 1991-10-31 | 1993-05-21 | Sumitomo Chem Co Ltd | Compressed air molding method with undercut of synthetic resin plate |
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