Adhesive bonding and miscellaneous chemical manufacture – Surface bonding means and/or assembly means therefor – Longitudinally progressive helical winding means
Patent
1977-04-12
1978-09-12
Simmons, David A.
Adhesive bonding and miscellaneous chemical manufacture
Surface bonding means and/or assembly means therefor
Longitudinally progressive helical winding means
156195, 156498, 156500, 15624413, B65H 8100
Patent
active
041135466
ABSTRACT:
Apparatus for producing tubes by helically winding strips of thermoplastics synthetic sheet material, comprising a double-shell coolable draw-off mandrel onto which, immediately after its extrusion through a slit nozzle or after being heated to a workable state, the sheet material is wound spirally in overlapping manner in such a way that it is formed into a tube with an obliquely extending winding seam, pull-off apparatus to cause and permit axial and rotational movement of the tube relative to the draw-off mandrel and cooling means to act directly on the sheet material wound into a tube on the draw-off mandrel. The double-shell draw-off mandrel can be cooled by liquid coolants circulating through a closed cooling system and between inner and outer shells of the mandrel. Conveyors extending longitudinally of the mandrel and laterally overlapping with one another can be provided to reduce friction between the tube and the mandrel. The pull-off apparatus may comprise a rotatable housing mounting caterpillars and surrounding the mandrel. A further extruder can be provided to extrude a further strip of material onto the tube to form outer layers of the tube and reinforcing material can be incorporated in the tube.
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Hermann Berstorff Maschinenbau GmbH
Jeffery Donald D.
Simmons David A.
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