Ejector pin assembly for injection moulding tools

Details Ejector pin assembly for injection moulding tools Ejector pin assembly for injection moulding tools

1974-08-21

1976-06-15

Husar, Francis S.

Static molds

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

Pin or sleeve means

164344, 249 74, B29C 700

Patent

active

039632091

ABSTRACT:
In an ejector pin assembly for injection moulding tools the ejector pin plate is positively retracted and locked in its rear position by providing the tool with a rearwardly extending hollow housing, having an inner annular pocket, by slidably arranging in said housing a slidable member, being connected to the ejector pin plate and having radial holes for receiving cupling elements such as balls, segments or the like, by arranging in said housing a spring operated member, which normally prevents the coupling elements from penetrating said sliding member inwardly and by securing to the generally stationary ejector means of the injection moulding machine an ejector rod, which near its free end has an annular groove into which said coupling elements may enter when said rod has been introduced in the housing and the spring operated member as a consequence thereof has been displaced such that it does not any longer cover said openings.

REFERENCES:
patent: 1915729 (1933-06-01), Gathmann
patent: 3334378 (1967-08-01), Scherrer-Wirz et al.
patent: 3817678 (1974-06-01), Armour

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