T-shaped film extrusion die

Details T-shaped film extrusion die T-shaped film extrusion die

1993-11-12

1995-03-07

Mackey, James P.

Plastic article or earthenware shaping or treating: apparatus

Means providing a shaping orifice

Adjustable shaping orifice or shape imparting insert member

4253781, 4253791, 425461, B29C 4716, B29C 4786

Patent

active

053952316

ABSTRACT:
A T-shaped film extrusion die for use in extrusion forming a film of a synthetic resin, has a manifold, a slot-like land, lips, inner deckles and inner deckle rods. Heat pipes are provided or disposed on both sides of the manifold so as to extend in parallel with each other in the lengthwise direction of the T-shaped die, and at least a part of the outer side surface of each of the heat pipes is exposed to the interior of the manifold over the entire length of the manifold.

REFERENCES:
patent: 3311952 (1967-04-01), Kovach et al.
patent: 3767346 (1973-10-01), Mihalik
patent: 3941550 (1976-03-01), Marion
patent: 3949905 (1976-04-01), Nikolov et al.
patent: 4201534 (1980-05-01), Phipps
patent: 4332543 (1982-06-01), Fulton et al.
patent: 4364722 (1982-12-01), Phipps
patent: 4659302 (1987-04-01), Maejima
patent: 4797083 (1989-01-01), Reifenhauser
patent: 5259747 (1993-11-01), Cloeren

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