Blow molding method using extendable mandrel and blow needle

Details Blow molding method using extendable mandrel and blow needle Blow molding method using extendable mandrel and blow needle

1976-04-08

1978-05-02

Silbaugh, Jan H.

Plastic and nonmetallic article shaping or treating: processes

Reactive gas or vapor treatment of work

Work is organic material

264 90, 264 98, B29C 1707

Patent

active

040875032

ABSTRACT:
A method for blow molding using a blow mold having mold halves which are relatively movable and receive a parison therebetween. A mandrel is carried by portions of the mold and is movable between an extended position and a retracted position. The mandrel has a free end with a vacuum surface area portion with the end being engageable with the parison when the mandrel is in its extended position. A blow needle is reciprocably mounted in the mandrel and insertion of same into the parison is facilitated by the parison being held against the end of the mandrel by vacuum.

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