Tire mold vent plug and method

Details Tire mold vent plug and method Tire mold vent plug and method

1990-02-22

1991-10-22

Silbaugh, Jan H.

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

Shaping against forming surface

249141, 425 281, 425812, 264315, B29C 3310, B29C 3502

Patent

active

050593803

ABSTRACT:
A mold for curing a green tire which is made of an elastomeric material capable of flowing prior to curing. The mold includes a surface defining a cavity in the mold for receiving the green tire. A passage communicates the cavity with the exterior of the mold. A vent plug is located in the passage. The vent plug has an opening extending therethrough communicating the cavity with the passage. Elastomeric material may flow into the opening to form a projection extending from the tire as the green tire is pressed against the surface defining the cavity during a molding operation. The vent plug has a portion extending into the cavity a predetermined distance from the surface to form a recess in the tire adjacent the projection. The recess provides a space that the projection may deflect into to prevent shearing off of the projection during removal of the tire from the mold.

REFERENCES:
patent: 2587297 (1952-02-01), Duerksen
patent: 3553790 (1971-01-01), Brobeck et al.
patent: 3608602 (1971-09-01), Youngblood
patent: 4436497 (1984-03-01), Dahl et al.
patent: 4740145 (1988-04-01), Shurman
patent: 4759701 (1988-07-01), Carter

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