A device for deforming and calibration of a pipe - injection molding process by means of the plastics produced

摘要

P the present invention relates to a device for forming and calibration of the sheath in an extrusion apparatus - blowing of the tubular sleeves cooled on the internal mandrel. It is characterized in that the device comprises at least a sleeve surrounding the shaft and coaxial with the die and the mandrel, said sleeve extending axially in a region close to the output of the die to the cylindrical part of the mandrel and comprising at least one transverse partition which has an opening at its center designed to fit with a slight play the contour of the chuck and of the sheath which surrounds this derncer, said sleeve, thus providing at least one annular chamber around the sheath, the device in order to establish suction therein, and means for adjusting this depression. / p & & p & it relates to a device for forming and calibration of the sheath in an extrusion apparatus - blowing of the tubular sleeves. / p