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Title:
MANUFACTURE OF DYNAMIC PRESSURE TYPE SLIDE BEARING MADE OF SYNTHETIC RESIN
Document Type and Number:
Japanese Patent JPS59220321
Kind Code:
A
Abstract:

PURPOSE: To enhance the gap accuracy of a bearing and the arrangement and shape accuracy of a dynamic pressure groove, by a method wherein a synthetic resin having specific coefficient of linear expansion is used and an inner mold is withdrawn to the axial direction thereof when the surface temp. difference of a molded resin and the inner mold in a cooling and solidifying process reaches to a definite limit or more.

CONSTITUTION: A molding material prepared by melting a synthetic resin with coefficient of linear expansion of 4×10-5/°C or less under heating is injected into a mold consisting of an outer mold 10 equipped with a molding material injecting gate 11 and an inner mold 2 having a protrusion for molding the dynamic pressure groove of a bearing provided to the outer peripheral surface thereof and equipped with a withdrawal mechanism to the axial direction thereof. When the inner surface temp. of the molded resin 14 is higher than the surface temp. of the inner mold 12 during the cooling and soldifying process of the molded resin 14 in the mold, the inner mold 12 is withdrawn to the axial direction while the molded resin 14 is taken out of the outer mold 10 and solidified to prepare a dynamic pressure type slide bearing made of a synthetic resin.


Inventors:
Furumura, Kyosaburo
Application Number:
JP1983000095372
Publication Date:
December 11, 1984
Filing Date:
May 30, 1983
Export Citation:
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Assignee:
NIPPON SEIKO KK
International Classes:
F16C33/20; B29B7/00; B29C39/00; B29C39/10; B29C39/26; B29C39/36; B29C39/44; B29C45/00; B29C45/44; B29C61/00; B29D99/00; F16C17/10; F16C33/12; (IPC1-7): B29C5/00; B29D31/02; F16C17/02; F16C33/20