Method of producing a length of flexible tubing in the form of a

Details Method of producing a length of flexible tubing in the form of a Method of producing a length of flexible tubing in the form of a

1981-07-28

1984-04-17

Anderson, Philip E.

Plastic and nonmetallic article shaping or treating: processes

With printing or coating of workpiece

Coating or impregnating workpiece before molding or shaping...

264257, 2642711, 264275, 2643282, 2643289, 26432812, 425123, 425543, 425577, B29F 110, B29H 902

Patent

active

044433964

ABSTRACT:
A mould and method for the manufacture of a length of plastic tube within which a reinforcing wire coil is embedded, the toothed-belt-like inner side of the tube being covered by a fabric cover, the mould comprising a mould core having axial teeth, tooth notches therebetween and a mould sleeve spaced therearound. The mould core, over which the sleeve-shaped fabric cover is first of all placed, whereupon the wire coil is wound thereon, forms, with the mould sleeve, a mould cavity having the shape of a cylindrical ring, the plastic being introduced axially into the mould cavity from one end. At a face end the mould core has an non-toothed mould core portion which projects axially beyond the end of the teeth and has a holding surface, the diameter of which is reduced down to the diameter of the tooth notches. The fabric cover has an edge projecting axially beyond the ends of the teeth, constricted radially past the cross sections of the tooth notches and fastened in sealing manner to the holding surface of the mould core portion and the plastic is introduced axially into the mould cavity at the end of the latter at the mould core portion which contains the fastened edge of the fabric cover.

REFERENCES:
patent: 1363912 (1920-12-01), Pauly
patent: 3109202 (1963-11-01), Beckadolph et al.
patent: 3441641 (1969-04-01), Roberts
patent: 3482004 (1969-12-01), Anderson
patent: 3856907 (1974-12-01), Cicognani

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