Plastic and nonmetallic article shaping or treating: processes – With measuring – testing – or inspecting
Patent
1998-06-30
2000-06-06
Silbaugh, Jan H.
Plastic and nonmetallic article shaping or treating: processes
With measuring, testing, or inspecting
264130, 264153, 264 406, 264320, 264322, 264348, 425157, 425158, 425160, 425395, 425400, B29C 4304, B29C 4358, B29C 5108, B29C 5146, B29C 7102
Patent
active
06071445&
ABSTRACT:
A method of forming plastics which comprises the sequential steps of cutting a plastic piece from a sheet of plastic, heating both sides of the plastic piece by contact heating, molding the heated plastic piece into its end-shape by press-molding, and cooling the heated and molded plastic piece into its end shape by air cooling means. In the preferred embodiment, the plastic piece, which may be laminated on one or both of its sides, is heated by use of a heating press which compresses the plastic piece thereby preventing "wrinkling" or warping of either side of the plastic piece. Thereafter, in the preferred embodiment, the heated plastic piece is positioned in a press-molding mechanism which comprises specially made male-female dies. Preferably, the air cooling step of the method takes place during the latter part of the press-molding step whereby both steps are, at some period, occurring concurrently. Also in the preferred embodiment, the heating press and the press-molding mechanism include a centering mechanism which ensures the correct placement of each plastic piece on the male/female dies of press-molding mechanism. The method is specially useful to suitably form pre-laminated plastic sheets.
REFERENCES:
patent: 2305433 (1942-12-01), Kyle
patent: 3020596 (1962-02-01), Clapp et al.
patent: 3084389 (1963-04-01), Doyle
patent: 3404056 (1968-10-01), Baldwin
patent: 3593376 (1971-07-01), Kisker et al.
patent: 3954374 (1976-05-01), Wommelsdorf et al.
patent: 4275864 (1981-06-01), Richards
patent: 4357381 (1982-11-01), Wilson
patent: 4390489 (1983-06-01), Segal
patent: 4436685 (1984-03-01), Emura et al.
patent: 4705930 (1987-11-01), Sathre, Jr. et al.
patent: 4994133 (1991-02-01), Oizumi et al.
patent: 5573814 (1996-11-01), Donovan
patent: 5858414 (1999-01-01), Hayashi et al.
Poe Michael I.
Silbaugh Jan H.
LandOfFree
Process for forming plastics does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Process for forming plastics, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for forming plastics will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2210913