Extrusion die

Details Extrusion die Extrusion die

1975-07-07

1977-02-15

Spicer, Jr., Robert L.

Plastic article or earthenware shaping or treating: apparatus

Means providing a shaping orifice

425376R, B29F 304

Patent

active

040080358

ABSTRACT:
An extrusion die is made by stretching a flexible membrane having one end held in a shape conforming to the input end of the die and the other end maintained in conformity with the desired profile of the part to be extruded.
A fluid having hardening properties is applied to one surface of the distended membrane. Once the material has hardened, the flexible diaphragm is stripped away, and the resultant contour is coated with a material to form the contour of the die. This contour is cast in a shell, with appropriate heat and heat sensing elements, to form the die.

REFERENCES:
patent: 2367451 (1945-01-01), West
patent: 2973551 (1961-03-01), Arslanian
patent: 3303530 (1967-02-01), Cobb, Jr.
patent: 3713762 (1973-01-01), Oisugu
patent: 3774266 (1973-11-01), Good
patent: 3825456 (1974-07-01), Weber et al.

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