Plastic article or earthenware shaping or treating: apparatus – Means providing a shaping orifice – Adjustable shaping orifice or shape imparting insert member
Patent
1981-11-12
1984-02-21
Thurlow, Jeffery R.
Plastic article or earthenware shaping or treating: apparatus
Means providing a shaping orifice
Adjustable shaping orifice or shape imparting insert member
264541, 264167, 2642092, 425192R, 425381, 425467, B29F 304
Patent
active
044327188
ABSTRACT:
An extrusion head with an annular extrusion die gap or orifice for fabricating a hollow extrudate of thermoplastic material. The extrusion head has a central die core and outer die casing ring cooperating to define the die gap. The inner boundary of the die gap is formed by a wall of the die core, while the outer boundary of the die gap is formed by a wall of the casing ring. At least one boundary wall of the die gap comprises independently movable sections that move with respect to the other boundary wall to change the width of the die gap.
REFERENCES:
patent: 3209404 (1965-10-01), Hagen
patent: 3346918 (1967-10-01), Deleuze et al.
patent: 3649148 (1972-03-01), Waltman et al.
patent: 3690798 (1972-09-01), Raspante
patent: 3932090 (1976-01-01), Brumlik
patent: 4124351 (1978-11-01), Garbuio
patent: 4279857 (1981-07-01), Feuerherm
Mauser-Werke GmbH
Thurlow Jeffery R.
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