Title:
METHOD FOR INJECTION-MOLDING RESIN RING
Document Type and Number:
Japanese Patent JP3731647
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a method for injection-molding a resin ring capable of suppressing the lowering of the strength of a weld part and capable of inexpensively manufacturing the resin ring of high precision.
SOLUTION: In the method for manufacturing the resin ring, a molten resin is injected in an annular cavity 19 formed in a mold 21 from the resin injection gate 10 provided to the peripheral edge of the annular cavity 19 to injection- mold a plastic seal 20 for a bearing. A resin sump 23 in which a part of the molten resin can flow is provided to the peripheral edge shifted from a weld part P2 of the ring-shaped cavity 19. The communication part 27 for allowing the resin sump 23 to communicate with the annular cavity 19 restricts the inflow amount of the molten resin flowing in the resin sump 23 from the annular cavity 19 to fill the resin sump 23 with the molten resin after the resin is charged in the annular cavity 19.
Inventors:
Asai spread
Toshimi Takashiro
Takahiko Uchiyama
Keisuke Yokoyama
Toshimi Takashiro
Takahiko Uchiyama
Keisuke Yokoyama
Application Number:
JP2001106238A
Publication Date:
January 05, 2006
Filing Date:
April 04, 2001
Export Citation:
Assignee:
Nippon Seiko Co., Ltd.
International Classes:
B29C45/26; B29C45/37; (IPC1-7): B29C45/26; B29C45/37
Domestic Patent References:
| JP8309793A | ||||
| JP58213410A | ||||
| JP10318263A | ||||
| JP7001514A | ||||
| JP5220791A | ||||
| JP59107223U | ||||
| JP6008293A |
Attorney, Agent or Firm:
Shohei Oguri
Hironori Honda
Toshimitsu Ichikawa
Takeshi Takamatsu
Yuriko Hamada
Hironori Honda
Toshimitsu Ichikawa
Takeshi Takamatsu
Yuriko Hamada
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