DEVICE FOR MANUFACTURE OF PLASTIC-COVERED METAL PIPE Russian patent published in 1997 - IPC

Abstract RU 2076784 C1

FIELD: ultrasonic seam welding. SUBSTANCE: device has means to form continuous metal strip into U-shaped section, form-shaping bushing for coiling the strip into pipe with overlapping seam edge, mandrel arranged inside form-shaping bushing, position sleeve, ultrasonic welding roller with drive providing rotation of roller at speed equal to pipe displacement speed, and devices for extruding the plastics on pipe surface. EFFECT: improved quality and reliability. 2 cl, 1 dwg

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RU 2 076 784 C1

Authors

Iskhak Barnoash[Il]

Dates

1997-04-10—Published

1989-08-02—Filed