Plastic article or earthenware shaping or treating: apparatus – Means feeding fluent stock from plural sources to common... – Extrusion shaping means
Patent
1990-03-02
1991-09-24
Thurlow, Jeffery
Plastic article or earthenware shaping or treating: apparatus
Means feeding fluent stock from plural sources to common...
Extrusion shaping means
15624415, 264167, 2642092, 264173, 425381, 425462, 425463, 425467, B29C 4724
Patent
active
050510819
ABSTRACT:
A method for producing a spiral pipe with a rib includes continuously extruding a thermoplastic synthetic resin material in a molten state into a tubular form so as to have a diameter and a predetermined wall thickness of a tubular body to be formed, and winding a rib-portion material in a molten state having a hollow shape or a solid shape in section extruded by an extrusion nozzle rotated about the outer periphery of the extruded and molded tubular body relative to the extrusion speed for the extruded and molded tubular body to integrally form a hollow or solid spiral member. An apparatus for producing such a spiral pipe with a rib includes a rotational body disposed on a frame through a bearing in the outer periphery of the extreme end of an extrusion die provided by inner and outer tubular extrusion die members integrally formed so as to extrude a thermoplastic synthetic resin through a nozzle orifice into a tubular form, and a rotational body provided with a cylindrical die having a nozzle orifice for extruding a rib member having a hollow section, the cylindrical die being positioned at the extreme end of the rotational body, the outer peripheral surface of the extruded molded tubular body being opposed to the nozzle orifice of the cylindrical die immediately after being extruded by the extrusion die.
REFERENCES:
patent: 3289250 (1966-12-01), Zernay
patent: 3477891 (1969-11-01), Hawerkamp
patent: 3496605 (1970-02-01), Onaka
patent: 4548567 (1985-10-01), Missout
patent: 4826423 (1989-05-01), Kemp et al.
patent: 4830694 (1989-05-01), Kanao
Thurlow Jeffery
Toyox Co., Ltd.
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