초록

An extrusion die having pivotally mounted parts disposed at the die outlet and pivotal locking members for latching the pivotal parts closed.

대표청구항 ▼

An extruder head having pivotable head parts consisting of two parts movable relative to each other for extruders for shaping plastic mixtures of rubber or synthetic extrusion material; said parts being pivotable, about fixed points on said extruder head, between a closed position and an open positi

An extruder head having pivotable head parts consisting of two parts movable relative to each other for extruders for shaping plastic mixtures of rubber or synthetic extrusion material; said parts being pivotable, about fixed points on said extruder head, between a closed position and an open position, and being arrested tightly pressed against said extruder head, in said closed position, ahead of an interchangeable extruder nozzle; the improvement in combination therewith which comprises: pivotally mounted latching member and a respective elastically yieldable spring element integrated in the extruder head and consequently subject to heat influence upon which elastic yieldability depends for each of said pivotable extruder head parts, with the latter bearing against said extruder head and said member being movable pivotally into engagement with one of said pivotable head parts to lock said one of said head parts closed position, so that oversized extruder head configuration can be avoided while a continuous, precise comformation of closure forces acting upon said movable parts of the extruder heads occurs relative to varying operating conditions which exist at any given time and furthermore harmful pressure peaks caused by extrusion material pressure variable directly against one of said parts subject to automatic temporary opening are already prevented before any plastic deformations and material failues occur.