Title:
METHOD AND DEVICE FOR MACHINING INNER SURFACE OF MOLDED CYLINDRICAL ARTICLE
Document Type and Number:
WIPO Patent Application WO/1980/001257
Kind Code:
A1
Abstract:
Method and device for pressurizing the inner surface of a molded cylindrical article by the step of pressurizing and forming the inner surface of the article while rotating a pressing unit (6a) of pressurizing means (6) relative to a molded article (2) during a period of time which begins immediately after completion of solidification of the article ready for pressurizing and forming, and which continues until the transition temperature of the article has been reached the temperature at which the tensile strength and elongation of the article undergo an abrupt charge. This is performed in order to pressurize and cause the collapse of blowholes and air bubbles in the molded article, and to harden the inner surface thereof.
Inventors:
TAKESHITA K (JP)
AMAKASU T (JP)
MIYAGAKI M (JP)
NAKAISHI M (JP)
UGATA K (JP)
AMAKASU T (JP)
MIYAGAKI M (JP)
NAKAISHI M (JP)
UGATA K (JP)
Application Number:
PCT/JP1979/000319
Publication Date:
June 26, 1980
Filing Date:
December 19, 1979
Export Citation:
Assignee:
KUBOTA LTD (JP)
TAKESHITA K (JP)
AMAKASU T (JP)
MIYAGAKI M (JP)
NAKAISHI M (JP)
UGATA K (JP)
TAKESHITA K (JP)
AMAKASU T (JP)
MIYAGAKI M (JP)
NAKAISHI M (JP)
UGATA K (JP)
International Classes:
B22D13/02; B22D13/10; B22D27/11; B22D29/00; B22D31/00; (IPC1-7): B22D29/00; B22D13/10
Foreign References:
| JPS374824Y1 | ||||
| JPS487990B1 | ||||
| US3259975A | 1966-07-12 | |||
| JPS5050261A | 1975-05-06 |
Other References:
See also references of EP 0028653A4
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