Ejector pin retracting means for plastic molding dies

Details Ejector pin retracting means for plastic molding dies Ejector pin retracting means for plastic molding dies

1976-09-29

1977-10-04

Flint, Jr., J. Howard

Static molds

Including means to apply force to remove or release product...

Pin or sleeve means

249 68, 249205, 74527, G05G 508, B29C 700, B29F 114

Patent

active

040520331

ABSTRACT:
The disclosure relates to an ejector pin retracting means for plastic molding dies and die cast molds; the retracting means being commonly known as an early return system for retracting ejector pins into a mold cavity into flush relationship with a surface thereof before a conventional laterally moving slide mechanism is actuated, and thereby preventing the slide mechanism from hitting the extended ejector pins and causing damage thereto. The invention comprises resilient means operable by a return rod, the resilient means being engageable by the rod and resiliently expandable to permit the rod to pass therethrough after the rod has applied sufficient force to the resiliently expandable means so as to retract the ejector pins into one of the mold cavities and into flush relationship with an inner surface thereof.

REFERENCES:
patent: 2483094 (1949-09-01), Harvey
patent: 3125801 (1964-03-01), Fields
patent: 3516302 (1970-06-01), Muttart
patent: 3986805 (1976-10-01), Haines

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