Deckle cooling means to prevent leakage

Details Deckle cooling means to prevent leakage Deckle cooling means to prevent leakage

1976-08-20

1977-11-08

Spicer, Jr., Robert L.

Plastic article or earthenware shaping or treating: apparatus

Means providing a shaping orifice

Adjustable shaping orifice or shape imparting insert member

425327, B29F 304

Patent

active

040573850

ABSTRACT:
In a process for melting, extruding, and forming a thermoplastic synthetic resin, wherein a deckle mounted on a die device of an extruder is moved lengthwise of a slit in the die to thereby vary the length of the slit and to adjust the width of a flat film being extruded, the improvement comprising stopping the leaking of the molten resin around the deckle portion by forcibly cooling the deckle with a cooling medium, such as air, water or the like, so as to increase the viscosity of the molten resin around the deckle, whereby a decreased fluidity of the molten resin occurs.

REFERENCES:
patent: 3840318 (1974-10-01), Solop
patent: 3870454 (1975-03-01), Penrod

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