Adjustable, leak-free sealing device for polymer dies

Details Adjustable, leak-free sealing device for polymer dies Adjustable, leak-free sealing device for polymer dies

1996-07-17

1998-11-03

Vargot, Mathieu D.

Plastic and nonmetallic article shaping or treating: processes

With measuring, testing, or inspecting

2641761, 425141, 425466, B29C 4792

Patent

active

058303910

ABSTRACT:
The present invention provides an adjustable, leak-free sealing device for sealing the die orifice of a molten polymer die. The sealing device includes a sealing bar seated against and blocking a portion of the die orifice, a deckle holder slideably connected to one side of the die and extending under the die orifice, and a plurality of springs seated on the deckle holder and biasing the sealing bar against a portion of the die orifice. The springs have a combined spring force equal to or greater than the die orifice outlet pressure such that the sealing bar provides a leak-free seal along a portion of the die orifice.

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