Plastic and nonmetallic article shaping or treating: processes – Direct application of fluid pressure differential to... – Producing toroidal work
Patent
1990-01-16
1991-06-18
Silbaugh, Jan H.
Plastic and nonmetallic article shaping or treating: processes
Direct application of fluid pressure differential to...
Producing toroidal work
152DIG16, 156125, 1561281, 264326, 2643283, 264513, 425 44, B29C 4514, B29D 3018
Patent
active
050248006
ABSTRACT:
A tire is made by first fitting a pair of bead rings interconnected by reinforcement over a gas-pervious annular liner to form an annular core assembly and then inflating the core assembly by directly contacting same with a fluid to impart to the core assembly an inwardly open U-shaped section. This U-section core assembly is then spacedly enclosed in a mold which is filled around the U-section core assembly with a hardenable elastomer which is hardened so it bonds to the reinforcement, rings, and liner to form a tire. Finally the liner is deflated and the tire is demolded. The liner has a pair of opposite end edges and is inflated by sequentially clamping each of the edges against a support so as to define between the liner and the support a pressurizable chamber, displacing one of the clamped edges toward the other so as to outwardly bow the liner, and introducing a fluid, typically air, into the chamber. It is also possible to mount the rings in the mold and thereafter introduce the liner into the form for fitting it and the rings together.
REFERENCES:
patent: 2645265 (1953-07-01), O'Neil
patent: 3229013 (1966-01-01), Newton et al.
patent: 3554262 (1971-01-01), Swanson
patent: 3782871 (1974-01-01), Turk
patent: 4065338 (1977-12-01), Mirtain
patent: 4295513 (1981-10-01), Lovell et al.
patent: 4444612 (1984-04-01), Fink
patent: 4502520 (1985-03-01), Sandstrom
Grunner Erich
Schmidt Oskar
Dubno Herbert
Lim Kunststoff Technologic Gesellschaft m.b.H.
Silbaugh Jan H.
Vargot Mathieu
Wilford Andrew
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