Extrusion die blade

Details Extrusion die blade Extrusion die blade

1979-11-16

1981-02-24

Thurlow, Jeffery R.

Plastic article or earthenware shaping or treating: apparatus

Means providing a shaping orifice

Adjustable shaping orifice or shape imparting insert member

425141, 425143, 425379R, B29F 304

Patent

active

042525195

ABSTRACT:
An improved slit die for extruding thermoplastic sheet and having the capacity for fine gauge control comprises a die blade and an opposed surface in which the local separation between the two is variable by the generation of localized expansion and contraction forces in the body of the die blade while isolating the die blade lip from temperature variations by the provision of a heat barrier means.

REFERENCES:
patent: 3341388 (1967-09-01), Bunyea
patent: 3767346 (1973-10-01), Mihalik
patent: 3775035 (1973-11-01), Scotto et al.
patent: 3819775 (1974-06-01), Mules
patent: 3883279 (1975-05-01), Heyer
patent: 3920365 (1975-11-01), Mules
patent: 3940221 (1976-02-01), Nissel
patent: 3941551 (1976-03-01), Marion

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