Suspended extrusion machines

The triumphal march of the auger extruder however was not to be stopped. For all that, a great deal of design work and detail development had to be undertaken to reach today s state-of-the-art technology, which will be dealt with separately in Chapter 2 in much more detail. Around 1870 vertical auger extruders, the so-called suspended extrusion machines , were brought onto the market, to become forerunners of the later sewer pipe presses (Fig. 18). 

Schlickeysen builds the suspended sewer pipe extrusion machine including socket shaping with lowering table, which he patented Sachsenberg of Rosslau builds an upright expression rolls machine for the sewer pipe industry, which is successfully tested in Bitterfeld at the factory of Messrs. Polko Schlickeysen introduces a second feed roller for the extrusion machine... 

Processed by powder sintering, fusing of suspended particles, injection molding, molding, extrusion, welding, machining. 

Vertical extruders (suspended extruders). The vertical extruder was very quickly adopted early on for the extrusion of certain products, in particular for stoneware pipes and large size slugs, also for certain shapes of roofing tiles and small items in the advanced ceramic industry. Favoured by the vertical outlet, the column can easily be removed without the risk of being deformed. As the products were extruded in an upright manner the machine was also often incorrectly referred to as an upright extruder. 

In 1977 another expression rolls machine known as the Elephant emerged. This adopted a new ceramic extrusion method utilizing electrophoresis following the Elephant principle. It cannot be formally classified as an extruder, rather being a machine for shaping by means of precipitating slurry in an electric field (electrophoresis) , yet the unusual features of this special process do in fact fulfil the requirements of column extrusion. The process could also be termed the extrusion of slurry The physical phenomenon of electrophoresis has been known since the 19 century, when Reuss discovered that particles suspended in water... 

Let-off A device used in coating by calendering or extrusion to suspend a coil or reel from which the material to be coated is fed to the coating machine. 

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