Apparatus for manufacturing plastic pipes

Adhesive bonding and miscellaneous chemical manufacture – Surface bonding means and/or assembly means therefor – Longitudinally progressive helical winding means

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Details

156500, B29D 2304, B29D 2312

Patent

active

039740196

ABSTRACT:
An apparatus for continuously manufacturing a reinforced plastic pipe in which a reinforced plastic strip having a substantially I-shaped reinforcing spiral core embedded therein and partly exposed out of the strip is wound on at least three segmental sleeves slidably mounted on rotary shafts whose centers are arranged at vertexes of a regular polygon, respectively. During rotation of the rotary shafts, those segmental sleeves which are in contact with an envelope that is tangent to the segmental sleeves are moved forward while those segmental sleeves which are not in contact with the envelope are moved backward in a smooth manner by a guide means. The alternate forward and backward movements of the segmental sleeves are capable of continuously manufacturing the reinforced plastic pipe without producing strain at the joints between the lateral edges of the successive turns of the plastic pipe.

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