Reduced flash molding

Details Reduced flash molding Reduced flash molding

1986-07-30

1987-05-26

Hoag, Willard E.

Plastic and nonmetallic article shaping or treating: processes

With severing, removing material from preform mechanically,...

Flash or sprue removal type

264326, 264334, B29C 4350, B29C 3502, B29D 3000

Patent

active

046684565

ABSTRACT:
A mold used for forming an elastomeric article such as a tire under heat and pressure is provided with small grooves at selected locations along the internal cavity walls to reduce or eliminate flash which customarily forms at these locations. Specifically, grooves are provided at the structural interfaces of replaceable mold components, such as tread and bead rings with cavity wall portions of the mold sections. The grooves operate to trap or collect elastomeric material extruded into the interfaces and provide a seal-like barrier to further flash.

REFERENCES:
patent: 2961713 (1960-11-01), Hartley
patent: 3485911 (1969-12-01), Reyburn
patent: 4389365 (1983-06-01), Kudriavetz

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