Tire production with jet air cooling during post inflation

Abstract

Abstract Improvements in tire manufacture, leading to the production of pneumatic tires characterized by optimized sets of circumferentually substantially uniform thermal, physical and geometrical properties, are disclosed. In the course of the mold cycle in the press, such a tore is heated for a predetermined period of time sufficient to impart to the tire a major portion of the final desired cure sate to be achieved during the cure cycle which also includes a post inflation cycle outside press. During the post inflation cycle, cooling air, preferably air taken form the curing room atmosphere itself, is direct in jet form to be incident initially against the tread region of the tire form the exterior of the latter along the entire circumference thereof, the air thereafter flowing at least in part over the sidewall regions of the tie. The air flow conditions are so selected as to achieve in the vicinity of the initial contact of the cooling air with the tire a tire to air heat transfer coefficient ranging form about 15 to about 70 B.t.u/hr./sq.ft/oF. for effecting a rapid and controlled cooling of the tire, and the duration of the jet air cooling is adjusted to be less than the said heating period in the mold but nevertheless still sufficient, despite the rapid cooling to enable the remaining minor portion of the desired final cure state to be achieved in the course of the post inflation cycle. This abstract is not to taken either as a complete exposition or as a limitation of the present invention, however, the full nature and extent of the invention being discernible only by reference to and from the entire disclosure.

Inventors

• 👤 R Hugger
• 👤 G Huang

Bibliographic Details