Process for casting tire tread impressions using a photopolymeri

Details Process for casting tire tread impressions using a photopolymeri Process for casting tire tread impressions using a photopolymeri

1989-08-07

1990-11-13

Thurlow, Jeffery

Plastic and nonmetallic article shaping or treating: processes

Carbonizing to form article

Agglomeration or accretion

264 401, 264102, 264220, 264225, 4251744, B29C 3508

Patent

active

049700332

ABSTRACT:
Disclosed is an improved process for casting the impression of a tire tread by preparing a negative mold of the tire tread and making a positive cast from the negative mold. The improvement consists of pouring a liquid photopolymerizable composition into the negative mold of the tire tread, applying a vacuum, exposing the composition to ultraviolet radiation to cross-link the polymer, removing the positive cast from the negative mold, and exposing the cast to additional ultraviolet radiation in the absence of oxygen to harden the surface of the cast.

REFERENCES:
patent: 2560052 (1951-07-01), Miller et al.
patent: 2982998 (1961-05-01), Smith et al.
patent: 3374297 (1968-03-01), Henderson
patent: 3415923 (1968-12-01), Petersen
patent: 3798134 (1974-03-01), Hynes
patent: 4073577 (1978-02-01), Hofer
patent: 4444607 (1984-04-01), Lash et al.
patent: 4595543 (1986-06-01), Williams
patent: 4814119 (1989-03-01), Scholz
Hercules Automotive Testing Services Bulletin.

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