Flash suppressing mold apparatus

Details Flash suppressing mold apparatus Flash suppressing mold apparatus

1991-05-17

1993-06-08

Heitbrink, Tim

Plastic article or earthenware shaping or treating: apparatus

Female mold and charger to supply fluent stock under...

With coupling between charger and mold

2643289, 4254501, 4254519, 425812, B29C 4534

Patent

active

052177327

ABSTRACT:
Disclosed is a mold and a method for injection molding plastic components in which the conventional horizontal parting line is replaced with an angled parting line to allow for utilization of increased packing pressure without the formation of flashing. By positioning at least the portion of the parting line extending immediately outward of the mold cavity at an acute angle with respect to the separating direction of two adjacent mold sections, the separation distance between adjacent mold sections can be increased above a critical flashing distance while maintaining the span at the angled parting line below the critical flashing distance to preclude flash formation. Specifically, the span at the angled parting line increases in proportion to the sine of the angle between the angled parting line and the separating direction. Accordingly, higher pressures can be employed to allow for increased production rates with angled parting line molds of the present invention in comparison with conventional molds.

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