Patent ID: 6508581
Filing Date: 2003-01-21
Classification: B29B,B29C

Abstract:
An extrusion apparatus comprising:an extrusion worm having a threaded exterior for advancing material therealong upon rotation of the extrusion worm, the extrusion worm being connected to a drive shaft which is operatively couplable with a drive motor for driving rotation of the drive shaft and the extrusion worm about a rotational axis; a feed in device for feeding in strip form material which is to be extruded, the feed in device being disposed relative to the rotation axis such that the material strips fed in by the feed in device are advanced substantially parallel to the rotational axis during rotation of the drive shaft and the extrusion worm, and means encircling at least the extrusion worm in a transition region at which the material strips leave the drive shaft and are received onto the extrusion worm, the encircling means and the extrusion worm forming a space therebetween which reduces in size in the direction of advancement of material.