Endless tread mold apparatus

Details Endless tread mold apparatus Endless tread mold apparatus

1974-12-18

1976-06-15

Flint, Jr., J. Howard

Plastic article or earthenware shaping or treating: apparatus

Product or preform repair or restoring means

Tire recapping, rebeading or sidewall replacing means

425 47, 425215, B29H 504, B29H 508

Patent

active

039633934

ABSTRACT:
A tire tread moldin apparatus is disclosed. The apparatus, which produces an endless and seamless toroidal tire tread for use in retreading of tire carcasses, utilizes a central mandrel and a sectional retractable outer portion, defining the inner and outer sides of a mold. The mandrel and the outer mold sections are heated to cure the rubber stock as it is formed into a tire tread, and curing pressure is provided by the manner in which the outer mold sections converge upon the mandrel and by thermo-expansion.

REFERENCES:
patent: 2148079 (1939-02-01), Martin
patent: 2866228 (1958-12-01), French
patent: 2976575 (1961-03-01), Daubenberger
patent: 3042966 (1962-07-01), Laycox
patent: 3159699 (1964-12-01), Lutphin
patent: 3358330 (1967-12-01), Pacciarini et al.
patent: 3429005 (1969-02-01), MacMillan
patent: 3713929 (1973-01-01), Bottasso et al.
patent: 3843291 (1974-10-01), Drab

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