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Patent Searching and Data


Title:
PRODUCTION OF RESIN MOLDED PRODUCT
Document Type and Number:
Japanese Patent JPH07214688
Kind Code:
A
Abstract:

PURPOSE: To improve shaping properties while preventing an air sump. or a resin sump. by arranging a preformed object made of a thermoplastic resin between a pair of split molds held to an opposed and separated state in a plasticized state and successively performing the clamping of the split part of one split mold with respect to the other split mold so as to provide a time lag to perform molding.

CONSTITUTION: The mold 9a for the side wall part of a split mold 9 is allowed to protrude and a parison 15 being a preformed object in a plasticized state is held between the cavity 10 for the outside of a split mold 8 and the mold 9b for the inside part of the other split mold 9 to perform primary mold clamping. The mold 9b for the inside part is clamped to the mold 9a by next secondary mold clamping to mold the inside cavity. At that time, the parison 15 enters the cavities 11a-11d for respective projections of a cavity 11 for an inside to be subjected to hollow molding. At that time, an air passing needle 13 is moved so as to protrude to be thrust in the parison of a hollow projection part and the pressure of this part is detected by a pressure detector 14 to adjust the pressure of air.


Inventors:
ENDO HARUHIRO
Application Number:
JP764794A
Publication Date:
August 15, 1995
Filing Date:
January 27, 1994
Export Citation:
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Assignee:
KYORAKU CO LTD
International Classes:
B29C43/20; B29C43/34; B29C49/02; B29C49/20; B29C49/48; B29D22/00; B29C49/04; B29L9/00; B29L22/00; (IPC1-7): B29D22/00; B29C43/20; B29C43/34; B29C49/02; B29C49/20; B29C49/48
Attorney, Agent or Firm:
Masaaki Yonehara (2 others)