Apparatus for manipulating parisons in blow molding machines

Details Apparatus for manipulating parisons in blow molding machines Apparatus for manipulating parisons in blow molding machines

1977-03-04

1978-07-25

Lazarus, Richard B.

Plastic article or earthenware shaping or treating: apparatus

Female mold and means to shape parison directly by internal...

With heating or cooling means

B29D 2303

Patent

active

041026268

ABSTRACT:
A tempering mold for parisons which are formed in a parison mold and are about to be introduced into a blow mold has a tubular section open at one end and a second section reciprocable in the other end of the tubular section. A parison which is carried by a blowing mandrel, which tapers in a direction toward the free end of the mandrel and whose smaller-diameter end is closed, is introduced into the tubular section by way of the open end so that its closed end engages and displaces the yieldably mounted second section before the conical surface of the parison comes into contact with the complementary internal surface of the tubular section. The latter is biased by helical springs so that it can yield to the parison by moving axially and/or by pivoting with respect to its support. At least one of the sections is heated and/or cooled by a fluid or in another suitable way to effect rapid and reproducible conditioning of successive parisons.

REFERENCES:
patent: 3074110 (1963-01-01), Mard et al.
patent: 3347966 (1967-10-01), Seefluth
patent: 3964856 (1976-06-01), Day

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