Plastic and nonmetallic article shaping or treating: processes – Carbonizing to form article – Agglomeration or accretion
Patent
1988-05-26
1991-01-15
Simmons, David A.
Plastic and nonmetallic article shaping or treating: processes
Carbonizing to form article
Agglomeration or accretion
264 464, 264 466, 264265, B29C 5100
Patent
active
049851896
ABSTRACT:
A method of producing a skin-covered pad for a seat, which includes (a) preparing a lower mold which has a cavity formed therein, the lower mold having a first electrode mounted thereto through an insulator, the first electrode having a plurality of projections which are exposed to the cavity; (b) putting a bag-shaped outer skin member into the cavity, the skin member being thermally plastic; (c) putting an upper mold on the lower mold to close the cavity, the upper mold having an aperture formed therethrough; (d) projecting a press member into the cavity through the aperture, the press member having at its work head a second electrode secured thereto through an insulator, the second electrode having at its front face recesses which are shaped to match with the projections of the first electrode; (e) pressing the recessed face of the second electrode against the projections of the first electrode with a part of the outer skin member therebetween; (f) applying a high frequency current between the first and second electrodes thereby to heat and thus soften the part of the outer skin member; (g) separating the recessed face of the second electrode from the projections of the first electrode; and (h) pouring a liquid material for foamed plastic into the cavity and curing the same.
REFERENCES:
patent: 2914109 (1959-11-01), Hsu et al.
patent: 2946713 (1960-07-01), Dusina et al.
patent: 2948929 (1960-08-01), Stallard
patent: 3265551 (1966-08-01), Ananian et al.
patent: 4561917 (1985-12-01), Urai
patent: 4680150 (1987-07-01), Matsuda
Chiyoshi Toyoharu
Matsuura Ichiro
Miyauchi Fumio
Sugiura Takashi
Ikeda Bussan Co. Ltd.
Kuhns Allan R.
Simmons David A.
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