Method for designing a profile extrusion die plate

Details Method for designing a profile extrusion die plate Method for designing a profile extrusion die plate

1995-06-13

1997-03-04

Gordon, Paul P.

Boots, shoes, and leggings

36447501, 425461, G06F 1900, G06G 764, G06G 766

Patent

active

056086377

ABSTRACT:
The present invention discloses a method for designing a profile extrusion die plate. In the present invention, a representation of a product made from a resin material and shaped by a die is provided. The representation illustrates a relationship between die swell of the resin, shear rate of the resin through the die, and the ratio of die land length of the die to die opening thickness of the die. From the representation, instances where the ratio of die land length to die opening thickness minimizes die swell of the resin is determined. Experimental data of the resin shaped by an experimental die is then obtained. The experimental data includes draw speed, shear rate, and die swell. The representation and the experimental data are then arranged into die design charts for die opening thickness and die opening width. The die design charts are then used to determine profile dimensions of a desired profile extrusion die.

REFERENCES:
patent: 4751651 (1988-06-01), Bryan
"Plastics Extrusion Operating Manual, An Introduction and Guide to Extrusion" by Allan L. Griff, Tenth Revised Edition, 1992, pp. 1-58.
Cycolac ABS Resin Design Guide, Date Unknown.
"Die Design Principles for Extrusion of Polymers", by Leonard Sansone, Society of Plastics Engineers Educational Seminars, Date Unknown.

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