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Title:
INJECTION MOLDING METHOD OF THERMOPLASTIC RESIN, INJECTION MOLDING NOZZLE AND HOT RUNNER
Document Type and Number:
Japanese Patent JPH06285910
Kind Code:
A
Abstract:

PURPOSE: To provide an injection molding method of thermoplastic resin and injection molding nozzle and hot runner wherein stringing phenomenon to be generated at mold opening does not occur.

CONSTITUTION: A cylindrical injection molding nozzle 20 having at its tip a melt resin injecting hole 22 is attached to a resin injecting opening 13 of a melt resin supplying machine and is engaged with a nozzle engaging part of a sprue provided in an injection mold so as to inject melted thermoplastic resin into the sprue. At a tip 22b of the melt resin injecting hole 22 of the nozzle 20, a flow dividing plate 24 crossing the hole 22 is provided so as to narrow the area of the hole 22 and enlarge the contact area of the resin in the tip of the hole 22 and the nozzle 20, so that cooling and solidification of the resin in between the nozzle 20 and the sprue in cooling process are accelerated and stringing phenomenon which has conventionally been a problem in releasing process can be eliminated.


Inventors:
SHIGETA MASAHIRO
Application Number:
JP7682193A
Publication Date:
October 11, 1994
Filing Date:
April 02, 1993
Export Citation:
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Assignee:
KOITO MFG CO LTD
International Classes:
B29C45/20; B29C45/26; B29C45/74; (IPC1-7): B29C45/20; B29C45/26
Attorney, Agent or Firm:
八木 秀人 (外1名)