Plastic article or earthenware shaping or treating: apparatus – With apparatus assembly or dismantling means or with idle part – Plural wear or shaping surfaces mounted for alternative use
Patent
1982-11-08
1984-07-31
Czaja, Donald E.
Plastic article or earthenware shaping or treating: apparatus
With apparatus assembly or dismantling means or with idle part
Plural wear or shaping surfaces mounted for alternative use
425185, 425186, 425577, 264538, B29D 2302
Patent
active
044627823
ABSTRACT:
An injection sleeve molding machine having a rubber injection section and a sleeve molding section, in which the sleeve molding section includes a barrel with a mold cavity for receiving uncured rubber material, and two mandrels having a forward and rearward end inserted axially and alternately into the cavity of the barrel for a molding operation. The rear end of the mandrels are mounted on a pivoted member on a carriage which travels parallel to the axis of the mandrels for inserting the mandrels in the cavity of the barrel. When the molding operation has been completed, the carriage withdraws the mandrel from the cavity, and the pivoted member for the mandrels is rotated angularly to place a mandrel in position for insertion in the cavity. When it has been inserted in the cavity, the second injection operation is performed and, while that second operation is being performed, the previously formed molded sleeve is stripped from the first mandrel, thus preparing it for the next succeeding molding operation.
REFERENCES:
patent: 3550209 (1970-12-01), Carpenter
patent: 3776991 (1973-12-01), Marcus
patent: 4076484 (1978-02-01), Armour
patent: 4243362 (1981-01-01), Rees
Czaja Donald E.
Fischbach V.
Hobbs Marmaduke A.
T & M Rubber, Inc.
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