Method for manufacturing injection-molded foamed article

Details Method for manufacturing injection-molded foamed article Method for manufacturing injection-molded foamed article

2006-02-07

2006-02-07

Kuhns, Allan R. (Department: 1732)

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

By gas forming or expanding

C264S051000

Reexamination Certificate

active

06994814

ABSTRACT:
Disclosed is a method for manufacturing an injection-molded foamed article, the method comprising the steps of:melt-kneading a thermoplastic resin and a chemical foaming agent in a cylinder of an injection unit,injecting the melt-kneaded thermoplastic resin from the cylinder into a cavity of a mold, andcooling and solidifying the thermoplastic resin injected in the cavity, wherein at least one of conditions (1) and (2) given below is satisfied:in-line-formulae description="In-line Formulae" end="lead"?Mp+35° C.≦T≦Mp+115° C. and γ≧1800 sec−1  (1)in-line-formulae description="In-line Formulae" end="tail"? wherein Mpdenotes the melting point (° C.) of the thermoplastic resin, T denotes the molding temperature (° C.) and γ denotes the shear rate (sec−1) of the thermoplastic resin during its filling into the cavity at the molding temperature T;in-line-formulae description="In-line Formulae" end="lead"?Tm≧Mp−105° C.  (2)in-line-formulae description="In-line Formulae" end="tail"? wherein Tmdenotes a mold temperature (° C.), and Mphas the same meaning as above.

REFERENCES:
patent: 4830798 (1989-05-01), Maeda
patent: 5124095 (1992-06-01), Gianni et al.
patent: 5252269 (1993-10-01), Hara et al.
patent: 5281376 (1994-01-01), Hara et al.
patent: 5551673 (1996-09-01), Furusawa et al.
patent: 5824759 (1998-10-01), Watanabe et al.
patent: 5928776 (1999-07-01), Shioya et al.
patent: 5-269778 (1993-10-01), None

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