Ads
related to: single screw extruders basics
Search results
Results From The WOW.Com Content Network
Single-screw extruders: In principle similar to co-rotating twin screw extruders, without the self-cleaning action. [1]: 325–344 [13] Wiped-film evaporators: Polymer solution is brought into a single large vessel, where a rotor agitates the product and creates surface renewal. Only a single pressure level is possible in these machines.
As with traditional extrusion, there is a wide range in machine sizes depending on application and desired throughput. While either single- or double-screw extruders may be used in traditional extrusion, the necessity of adequate mixing in compounding extrusion makes twin-screw extruders all but mandatory. [8] [9]
The polymer resin is heated to molten state by a combination of heating elements and shear heating from the extrusion screw. The screw, or screws as the case with twin screw extrusion, forces the resin through a die, forming the resin into the desired shape. The extrudate is cooled and solidified as it is pulled through the die or water tank.
Material extrusion-based additive manufacturing (EAM) represents one of the seven categories of 3D printing processes, defined by the ISO international standard 17296-2. While it is mostly used for plastics, under the name of FDM or FFF , it can also be used for metals and ceramics.
There, together with Werner Meskat, he developed the co-rotating twin screw extruder, submitting the basic patent in 1944. [2] At the end of the Second World War , Erdmenger and Meskat escaped from the approaching Red Army and joined Bayer AG in 1948, where Erdmenger founded the high viscosity technology group which he led until his retirement ...
During an extrusion process it is essential to consider the surface finish of exposed product surfaces. As a general rule, the narrower an exposed surface, the more uniform its finish becomes. Webs, flanges and abrupt changes in metal thickness may show up as marks on the opposite surface of an extrusion, particularly on thin sections. The ...