Coat hanger die

Details Coat hanger die Coat hanger die

1979-11-07

1981-08-25

Thurlow, Jeffery R.

Plastic article or earthenware shaping or treating: apparatus

Means providing a shaping orifice

264176R, 425376R, B29F 304, B29D 704

Patent

active

042856558

ABSTRACT:
An improved coat hanger die is provided wherein the manifold is curved and wherein the manifold radius, coat hanger slit part thickness and the form of the coat hanger die are determined by a formula which is disclosed all in relation to the radius of the manifold at its inlet. The radius of the manifold at its inlet is selected in consideration of the flow characteristics of the resin melt to provide a low melt velocity at the inlet.

REFERENCES:
patent: 3382535 (1968-05-01), Ferrari
patent: 3860383 (1975-01-01), Sirevicius
patent: 3970417 (1976-07-01), Page
patent: 4043739 (1977-08-01), Appel
"Geometry Design of a Coat-Hanger Die . . . ", Polymer Engineering and Science, vol. 19, No. 3, 2-1979, pp. 169-172.
"Extrusion Die Design for Cast Film Production", Caton, British Plastics, Mar. 1971, pp. 95-99.
"Designing Coat-Hanger Dies by Power-Law Approximation" Chung et al., Modern Plastics, 3-1976, pp. 52-55.
"Computer Modeling of Coat Hanger Dies . . . " Klein et al., SPE Journal, vol. 29, 7-1973, pp. 33-37.
"Polymer Processing" by James M. McKelvey, Wiley and Sons, New York, 1962, pp. 31-32.

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