Molding process for making toroidal manufactured articles from c

Details Molding process for making toroidal manufactured articles from c Molding process for making toroidal manufactured articles from c

1993-10-19

1995-05-23

Kuhns, Allan R.

Plastic and nonmetallic article shaping or treating: processes

Carbonizing to form article

Agglomeration or accretion

264 403, 264 51, 264 55, B29C 4410

Patent

active

054178983

ABSTRACT:
A toroidal semifinished product (5) made of raw elastomeric material is semivulcanized in a semivulcanization chamber (4) defined between two half-molds (2, 3) disposed close to each other. A pressure, preferably equal to the pressure exerted by the gases generated in the semifinished product (5), is created in the mold (1a). The half-molds (2, 3) are moved apart from each other and pressure in the mold is gradually reduced, thereby giving rise to the expansion and consequent transferring of the semifinished product (5) from the semivulcanization chamber (4) to a surrounding final vulcanization chamber (6). When the inner diameter of the semifinished product (5) is larger than the inner diameter of the final vulcanization chamber (6), said chamber is closed at its inner circumferential edge and then, after possible pressure increase in the mold, at its outer circumferential edge, in order to integrally enclose the semifinished product and enable completion of the vulcanization process.

REFERENCES:
patent: 2271498 (1942-01-01), Overstreet
patent: 2525965 (1950-10-01), Smith
patent: 3605848 (1971-09-01), Lombardi et al.
patent: 4060578 (1977-11-01), Kisbany
patent: 4208368 (1980-06-01), Egli
patent: 4352854 (1982-10-01), Siedenstrang et al.
patent: 4367109 (1983-01-01), Estrade et al.
patent: 4422987 (1983-12-01), Arimatsu
patent: 4470785 (1984-09-01), Koorevaar
patent: 4588542 (1986-05-01), Pierce
patent: 4783292 (1988-11-01), Rogers
patent: 4909972 (1990-03-01), Britz
patent: 4952365 (1990-08-01), Shibuya et al.
patent: 5240669 (1993-08-01), Kobayashi
patent: 5314648 (1994-05-01), Ichikawa et al.

Affiliated with

Also associated with

Rating

Molding process for making toroidal manufactured articles from c does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Molding process for making toroidal manufactured articles from c, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Molding process for making toroidal manufactured articles from c will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2138406