Extruder for plastic pipes - having device for automatically adjusting extrusion head parts controlling thickness of pipe wall

Boudineuse pour tuyaux en matiere plastique

Abstract

Extruder for plastic pipes has an extrusion head, a device for centring the pipe, a device (5) for measuring the wall thickness of the pipe, and a pipe transporter, and a control device for automatically adjusting the parts of the extrusion head controlling the pipe wall thickness, in accordance with the various wall thicknesses measured along the pipe periphery by the device (5). The extruder automatically compensates any deviations in the thickness of the pipe wall, so that a constant wall thickness is obtained; this is effected without any large increase in the cost of the appts.

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Cited By (4)

    Publication numberPublication dateAssigneeTitle
    EP-0321936-A2June 28, 1989Karl Dr.-Ing. Veit-HolgerFilm-blowing apparatus with a take-up roll
    EP-0321936-A3July 25, 1990Karl Dr.-Ing. Veit-HolgerFilm-blowing apparatus with a take-up roll
    EP-0429862-A1June 05, 1991Krauss-Maffei AktiengesellschaftZentriervorrichtung für einen Rohrextrusionskopf
    US-5120212-AJune 09, 1992Krauss-Maffei AktiengesellschaftThickness-adjusting system for tubing extruder