Double injection mold with neck gating

Details Double injection mold with neck gating Double injection mold with neck gating

1974-07-23

1976-03-30

Flint, Jr., J. Howard

Plastic article or earthenware shaping or treating: apparatus

Means feeding fluent stock from plural sources to common...

425DIG234, 264 97, B29D 104

Patent

active

039471764

ABSTRACT:
A parison for blow molding is applied to a core rod by successive injection operations in different injection molds. The material for the first layer is injected into the end of the mold cavity remote from the neck portion of the core rod, in the usual manner. The second layer is injected into the second injection mold cavity adjacent to the neck of the core rod to flow over the first layer in a direction from the cooler part of the first layer toward the hotter part. The twolayer parison is then transferred to a blowing mold where it is blown in the usual way.

REFERENCES:
patent: 2828509 (1958-04-01), Smucker et al.
patent: 3482284 (1969-12-01), Rees
patent: 3804576 (1974-04-01), Hehl

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