Method for foam injection molding of thermoplastic resin

Details Method for foam injection molding of thermoplastic resin Method for foam injection molding of thermoplastic resin

2006-08-23

2010-06-22

Del Sole, Joseph S (Department: 1791)

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

By mechanically introducing gas into material

C264S055000, C264S328700, C264S328180

Reexamination Certificate

active

07740776

ABSTRACT:
A method for injection foaming molding of a thermoplastic resin includes the steps of (1) injecting the foaming-agent-containing plasticized resin from an injection apparatus30to fill a mold cavity10a, (2) releasing a clamping force of a mold10immediately after the foaming-agent-containing plasticized resin is injected and filled into the mold cavity10a, so as to release the pressure of the foaming-agent-containing plasticized resin in the mold cavity10a, (3) maintaining the pressure-released state of the foaming-agent-containing plasticized resin in the mold cavity10afor a predetermined period of time, (4) expanding the mold cavity10ato foam the foaming-agent-containing plasticized resin, and (5) cooling and maintaining the foaming-agent-containing plasticized resin while the mold cavity10ais in the expanded state.

REFERENCES:
patent: 3801686 (1974-04-01), Kyritsis et al.
patent: 3883629 (1975-05-01), Garner et al.
patent: 4133858 (1979-01-01), Hayakawa et al.
patent: 4783292 (1988-11-01), Rogers
patent: 5334356 (1994-08-01), Baldwin et al.
patent: 6010656 (2000-01-01), Nomura et al.
patent: 6328916 (2001-12-01), Nishikawa et al.
patent: 6358446 (2002-03-01), Clarke
patent: 6623838 (2003-09-01), Nomura et al.
patent: 6893587 (2005-05-01), Murakoshi et al.
patent: 2002/0145214 (2002-10-01), Murakoshi et al.
patent: 2005/0003032 (2005-01-01), Sugihara et al.
patent: 2005/0230861 (2005-10-01), Takatori et al.
patent: 2007/0267772 (2007-11-01), Fischer et al.
patent: 2009/0140447 (2009-06-01), Kawamura et al.
patent: 2237064 (1998-11-01), None
patent: 2477149 (2003-09-01), None
patent: 43-9913 (1968-04-01), None
patent: 44-6080 (1969-03-01), None
patent: 06-506724 (1994-07-01), None
patent: 3091611 (1995-04-01), None
patent: 7088878 (1995-04-01), None
patent: 2002079545 (2002-03-01), None
patent: 2004009518 (2002-06-01), None
patent: 2002-283423 (2002-10-01), None
patent: 2004-009518 (2004-01-01), None
patent: WO2006011415 (2006-02-01), None
Office Action mailed Oct. 1, 2009, issued on the corresponding Canadian Patent Application No. 2,618,845.

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