Apparatus for the production of hollow bodies, especially large-

Details Apparatus for the production of hollow bodies, especially large- Apparatus for the production of hollow bodies, especially large-

1975-01-30

1977-07-05

Weston, Caleb

Adhesive bonding and miscellaneous chemical manufacture

Surface bonding means and/or assembly means therefor

Longitudinally progressive helical winding means

156428, 156498, 156500, 425321, 425322, B31C 1300, B29F 300

Patent

active

040338088

ABSTRACT:
A system for the production of large-diameter hollow bodies from a thermoplastic synthetic resin in which a synthetic-resin hollow-profile strip is extruded and coiled helically so that adjacent turns of the helix are butt-welded together at least in part with the extrusion heat. The synthetic-resin hollow-profile strip has a generally rectangular external cross-section and a substantially round inner cross-section (of the passage) and a cooling fluid is introduced into this passage upon extrusion, and is circulated through the passage at least over a portion of a turn of the helix.

REFERENCES:
patent: 2573300 (1951-10-01), Beaumariage et al.
patent: 2644983 (1953-07-01), Curtiss
patent: 2671939 (1954-03-01), Everhart et al.
patent: 3825641 (1974-07-01), Barvett

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