Method and apparatus for molding a tire

Details Method and apparatus for molding a tire Method and apparatus for molding a tire

1979-12-03

1982-06-08

Anderson, Philip

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

By gas forming or expanding

2643283, 2643286, 26432812, 26432816, 264DIG83, 425543, 425547, 425812, 425817R, B29D 2700

Patent

active

043338992

ABSTRACT:
A tire is cast and cured in a stationary mold having an annular mold cavity, an inlet opening and an outlet vent. The mold is tilted for optimum foam flow and minimum air or bubble entrapment. A liquid reactive mixture is injected into the mold through the inlet opening and moves through the mold cavity in different directions providing two leading surfaces which meet to form an interface adjacent the outlet vent. The air, foam gases and interface portion are extruded from the mold cavity through a slot in the vent into a reservoir. After curing of the elastomeric material formed by the liquid reactive mixture in the mold, the material in the slot and reservoir may be severed from the tire.

REFERENCES:
patent: 2993233 (1961-07-01), Hoppe et al.
patent: 3605848 (1971-09-01), Lombardi et al.
patent: 3684420 (1972-08-01), Barker
patent: 3712778 (1973-01-01), Lidl
patent: 3771928 (1973-11-01), Gostyn et al.
patent: 3853446 (1974-12-01), Hostettler et al.
patent: 3954537 (1976-05-01), Alfter et al.
patent: 3970732 (1976-07-01), Slaats et al.
patent: 3991147 (1976-11-01), Knipp et al.

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