B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
18/646
B29C 67/20 (2006.01) B29C 44/04 (2006.01) B29C 44/10 (2006.01)
Patent
CA 1243459
ABSTRACT OF THE DISCLOSURE An improved process for producing a foamed thermoplastic resin article which consists of a relatively thin non-foamed outer shell with a smooth surface and a foamed core portion, and has excellent dimensional stability, by pressurizing a mould cavity under a gas pressure less than the foaming pressure and not less than the surface smoothing pressure of a foamable resin and simultaneously with completion of the filling of the mould by injection inflow, reducing the gas pressure to atmospheric pressure or lower.
490461
Imai Susumu
Nagahara Takashi
Shibuya Takehiro
Asahi Kasei Kogyo Kabushiki Kaisha
Ridout & Maybee Llp
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