Blow molding machine with rotating core rods

Details Blow molding machine with rotating core rods Blow molding machine with rotating core rods

1978-03-15

1979-12-25

Silbaugh, Jan H.

Plastic article or earthenware shaping or treating: apparatus

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

With heating or cooling means

264538, 425533, B29C 1707

Patent

active

041803795

ABSTRACT:
This blow molding machine overcomes the tendency of the parison to sag toward the bottom side of the core or for air currents to unevenly cool the parison, while at the same time allowing the parison to be cooled from the core side and then outside to the desirable orienting temperature, so that at the subsequent blow, or stretch-blow station, a bi-axially oriented container is produced having uniform wall distribution. As a means of intensifying the cooling on the outside, in order to speed up the operation, provisions are made to enclose the parison with an open end cylinder having means of introducing a flow of air in a tangential manner so that it circulates around the parison as the parison is rotated.

REFERENCES:
patent: 3940223 (1976-02-01), Farrell
patent: 4018860 (1977-04-01), Farrell
patent: 4046498 (1977-09-01), Appel et al.

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