PROCESS OF MANUFACTURING POLYETHYLENE TUBE REINFORCED WITH METAL FRAME Russian patent published in 1999 - IPC

Abstract RU 2143628 C1

FIELD: production of polyethylene tubes. SUBSTANCE: process includes positioning of longitudinal metal fitting on mandrel, winding of lateral fitting on it with specified spacing, fixing of fittings in crossing points, formation of polyethylene sheath and division of continuous tube into sections of measured length. Winding at start and finish of measured length is conducted with spacing of t1 between turns which value meets relationship d<t1≤2d, where d is diameter of lateral fitting that is followed by threading on these sections. EFFECT: reduced labor input and saving of consumable materials. 1 cl, 2 dwg

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RU 2 143 628 C1

Authors

Dates

1999-12-27Published

1998-06-09Filed