Tread removal method and apparatus

Details Tread removal method and apparatus Tread removal method and apparatus

1990-10-03

1991-11-19

Thurlow, Jeffery

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

Shaping against forming surface

249 68, 2643283, 264326, 425441, 425444, 4254501, 425556, B29B 710

Patent

active

050664484

ABSTRACT:
A method and apparatus for automatically removing an annular grooved tread from an initially closed segmented mold is described. The segmented mold has an annular cavity and a central core, and has both an axial direction and a radial direction. The method includes the steps of withdrawing a first plurality of segments, restraining radial movement of the tread at a plurality of locations from which segments have been withdrawn, withdrawing a second plurality of segments, retracting the restraint, and then removing the tread from the core by using an axially movable annular ring located above the upper half of the mold. The annular ring includes a plurality of push off devices, each device having a spring loaded radially retractable tread pusher component.

REFERENCES:
patent: 1373229 (1921-03-01), Fording
patent: 3994650 (1976-11-01), Nishimura et al.
patent: 3994653 (1976-11-01), Marangoni
patent: 4207052 (1980-06-01), Satzler
patent: 4230511 (1980-10-01), Olsen
patent: 4818203 (1989-04-01), Majerus et al.
patent: 4826416 (1989-05-01), Majerus et al.
patent: 4984976 (1991-01-01), Kozachevsky et al.

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