Injection mold used to mold a preform with a hanger

Details Injection mold used to mold a preform with a hanger Injection mold used to mold a preform with a hanger

1995-03-17

1996-07-30

Heitbrink, Tim

Plastic article or earthenware shaping or treating: apparatus

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

Including means to prepare parison

425533, 425DIG58, B29C 4906

Patent

active

055405797

ABSTRACT:
The present invention provides a preform used to mold a container with hanger. This preform has a cylindrical bottomed barrel portion, a flat plate-like hanger having a central opening formed therethrough and a connection formed on the bottom wall of the barrel portion substantially at the center thereof, the connection connecting between the hanger and the bottom of the barrel. When this preform is injection molded, a molten plastic material is charged into the mold cavity through a gate communicating with the end of the hanger. The molten plastic material is divided into two branch streams at the hanger molding cavity region. These two streams are re-combined at the connection. The connection is of substantially circular cross-section and functions as a gate for permitting the molten plastic material to flow into the barrel molding cavity region.

REFERENCES:
patent: 4280859 (1981-07-01), Thompson
patent: 4395378 (1983-07-01), Alberghini et al.
patent: 4439390 (1984-03-01), Abramov et al.

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