Self-releasing mold

Details Self-releasing mold Self-releasing mold

1991-04-04

1992-05-12

Silbaugh, Jan H.

Plastic article or earthenware shaping or treating: apparatus

With apparatus assembly or dismantling means or with idle part

For extrusion or injection type shaping means

249 68, 249161, 264318, 264334, 425438, 425442, 425444, 425556, 425577, 425DIG5, 425DIG58, B29C 4544

Patent

active

051122073

ABSTRACT:
A mold forms a portion of a part having a first cross-section of a first thickness further removed from a body of the part than a second cross-section of a reduced thickness. The mold includes pairs of mold pins which are moved between a molding position at which they define a cavity to form the portion of the part, to a release position at which they allow the portion to move outwardly of the mold so that the part may be released. In an embodiment, the mold pins are actuated by a first actuator, and a second actuator actuates a plurality of ejector pins to force the part off the mold. In this way, it is ensured that the part is forced off of the mold, which can then be operated without supervision. In a preferred embodiment, a ramp member moves a holder for the mold pins between first and second positions, which causes the mold pins to move between the molding and release positions.

REFERENCES:
patent: 3060509 (1962-10-01), McCubbins, Jr.
patent: 4019711 (1977-04-01), Altenholf et al.
patent: 4184835 (1980-01-01), Talbot
patent: 4515342 (1985-05-01), Boskovic
patent: 4880048 (1989-11-01), Gaulard
patent: 4983346 (1991-01-01), Curliss et al.

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