JPS6464812A - Production of roll mold - Google Patents
Production of roll moldInfo
- Publication number
- JPS6464812A JPS6464812A JP22146087A JP22146087A JPS6464812A JP S6464812 A JPS6464812 A JP S6464812A JP 22146087 A JP22146087 A JP 22146087A JP 22146087 A JP22146087 A JP 22146087A JP S6464812 A JPS6464812 A JP S6464812A
- Authority
- JP
- Japan
- Prior art keywords
- straight cylinder
- original mold
- mold
- original
- outer diameter
- 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.)
- Granted
Links
Landscapes
- Moulds For Moulding Plastics Or The Like (AREA)
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
Abstract
PURPOSE:To form at a low cost, easily and accurately a mold for cast-molding a roll whose central part is expanded or recessed, by converting a straight cylinder to a deformed cylinder by shrinking and deforming it in a cooling process and thereafter pulling an original mold out after reheating. CONSTITUTION:For a straight cylinder 2, a material which is softer than an original old and whose linear expansion coefficient is larger than the original mold is used. The inner diameter of the straight cylinder 2 is made smaller than the outer diameter of the original mold taking expansion when hot-pressed into consideration, and when the inner diameter of the straight cylinder has become larger than the outer diameter of the original mold due to expansion by heating, the original mold 1 is inserted into the straight cylinder and until the temp. of the straight cylinder reaches ambient temp., it is left to cool. During this process, the straight cylinder 2 is shrunk and deformed along the outer diameter of the original mold. As the original mold is held in the deformed straight cylinder, the straight cylinder is expanded by reheating and when the inner diameter of the straight cylinder has become larger than the outer diameter of the original mold, the original mold is pulled out. After pulling out the original mold, the straight cylinder is cooled, but is is shrunk while the shape of the original mold is being held, and it is thereby possible to obtain a mold having the same shape as that of the original shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22146087A JPS6464812A (en) | 1987-09-04 | 1987-09-04 | Production of roll mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22146087A JPS6464812A (en) | 1987-09-04 | 1987-09-04 | Production of roll mold |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6464812A true JPS6464812A (en) | 1989-03-10 |
| JPH0528643B2 JPH0528643B2 (en) | 1993-04-27 |
Family
ID=16767066
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22146087A Granted JPS6464812A (en) | 1987-09-04 | 1987-09-04 | Production of roll mold |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6464812A (en) |
-
1987
- 1987-09-04 JP JP22146087A patent/JPS6464812A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0528643B2 (en) | 1993-04-27 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
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| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| EXPY | Cancellation because of completion of term | ||
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080427 Year of fee payment: 15 |