Pattern plate for making moulds intended for the production by s

Details Pattern plate for making moulds intended for the production by s Pattern plate for making moulds intended for the production by s

1989-07-06

1990-08-28

Seidel, Richard K.

Metal founding

Means to shape a forming surface

Pattern

164241, B22C 704, B22C 922

Patent

active

049522825

ABSTRACT:
A pattern plate for making moulds intended for use in the production by sand casting of window seals or similar articles having an undercut bead, includes a plate, a fixed exterior part, an axially movable interior part and a elastomeric ring connecting the interior and exterior part. The interior part moves axially over a short path defined within the exterior part by mechanical stops between an extended position, to which it is pushed back by springs, and a retracted position which it assumes through the action of the compaction pressure. During compaction, an annular elastomer ring located between the interior and exterior parts compresses to compact the mold material in a lateral direction. Upon release, the elastomeric ring returns to its original position facilitating the removal of the mould.

REFERENCES:
patent: 3624758 (1971-11-01), Harris
patent: 3773100 (1973-11-01), Mawson et al.

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