Title:
METHOD FOR INSERT MOLDING BY PRESS-FITTING
Document Type and Number:
Japanese Patent JP3216081
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To eliminate removal of a rubber and the like by press-fitting insert work in resin to prevent occurrence of weld in insert molding, and shutting off a cavity gate by the work itself.
SOLUTION: A work set hole 8 opened at a cavity mold surface is penetrated in a movable mold 2 in which a cavity 3 formed by closing a fixed mold 1 is recessed on a parting surface. A gate 14 is opened at the cavity side of the hole 8. An operating pin 10 is approachably and retractably inserted in the hole 8 from a rear part. An insert work 16 is inserted and set in the hole between the pin 10 and the gate 14, and the molds are closed. A predetermined amount of resin 15 is cast in the cavity 3. The work 16 is press-fitted in the cavity 3 by the pin 10 to be inserted while the resin 15 has fluidity. The gate 14 is shut off by the work 16.
Inventors:
Junichi Shimizu
Application Number:
JP23442097A
Publication Date:
October 09, 2001
Filing Date:
August 29, 1997
Export Citation:
Assignee:
Nissei Plastic Industry Co., Ltd.
International Classes:
B29C33/12; B29C45/00; B29C45/14; B29C45/38; B29C45/56; B29K105/22; (IPC1-7): B29C45/14; B29C33/12; B29C45/38; B29C45/56
Domestic Patent References:
| JP9155917A |
Attorney, Agent or Firm:
Teruo Akimoto
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