Extruders rotary-gear

Fig. 6 Schematic representation of gravity-fed extruders (A) rotary-cylinder extruder and (B) rotary-gear extruder.

Basic types of extruders include axial end plate, radial screen, rotary cyhnder or gear, and ram or piston. For a review, see Newton [Powder Technology Pharmaceutical Processes, Chuha et al. (eds.), Elsevier, 391 (1994).]... 

The die-holder v is set on a rotary table w which is provided with a worm gear and may be rotated by a hand-operated worm. This device is desirable when extruding hollow sections with the help of an angular mandrel, so as to be able to set the mandrel into the proper relative position to the die. The runout system for the extrusions consists of a pipe, being arranged in the center line of the frame, with a cooling jacket. 

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