Gruber & Co.group Gmbh

Other

Extrunet Gmbh

Gruber, Dietmar

Dietmar Gruber

Erwin Krumböck

Thomas Stadlhuber

The invention relates to a mixing device for a twin-screw extruder, in particular a twin-screw extruder rotating in the opposite direction, comprising a first screw and a second screw, for mixing a melt flow in a screw antechamber, wherein the first screw has an extension in the form of a mixing screw tip connected to the first screw in a fixed manner, and a first melt channel, into which the first screw feeds, is arranged in a flow-connected manner via an elongated slot with a second melt channel, into which the second screw feeds.

Mixing device in the screw antechamber of a twin-screw extruder

A device is suggested for calibrating an extruded plastic profile () having a shaping extrusion die () and having a framework () which is displaceable in the longitudinal direction of the plastic profile () in relation to the extrusion die (), which has a cooling tank () and, between the cooling tank () and the extrusion die (), a dry calibration apparatus () which is replaceably attached to a carrier () and is connectable on one hand to supply lines for a coolant liquid feed and removal and on the other hand to a partial vacuum. To obtain advantageous mounting conditions, it is suggested that the carrier (), which is adjustable in relation to the cooling tank () in the longitudinal direction of the plastic profile (), form a distributor, connected to the supply lines (), having line transitions () for the coolant liquid and the partial vacuum in the placement area of the dry calibration apparatus (), which is provided with corresponding line transitions.

Device for calibrating an extruded plastic profile

An apparatus for calibrating an extruded plastic profile forming at least one longitudinal groove (), comprises a calibrating body () receiving the profile (). Body () comprises a form nose () with a cooling channel () engaging in the longitudinal groove () and extending in the direction of passage of the profile, and coolant bores () extending transversally to the form nose () and crossing its cooling channel (). Cooling channel () which is open on both face sides is connected via a continuous slot () with a receiving recess () for sealing elements () which are inserted from the open face sides and form connecting openings () for the flow connection between the cooling channel () and the associated coolant bores (), which receiving recess penetrates the calibrating body () in the direction of passage and extends into the region of the coolant bores ()

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Schlierbach, Austria

Dietmar Gruber