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The rubber extruder completes all the above processes through a barrel with a screw and auger.
Release Time:
Sep 05,2023
The function of the rubber extruder is to convert solid plastic into a uniform melt by means of heating, pressure and shearing, and send the melt to the next process. The production of melt involves the process of mixing additives such as color masterbatch, blending resin and re-grinding. The finished melt must be uniform in concentration and temperature. The applied pressure must be great enough to squeeze out the viscous polymer.
The function of the rubber extruder is to convert solid plastic into a uniform melt by means of heating, pressure and shearing, and send the melt to the next process. The production of melt involves the process of mixing additives such as color masterbatch, blending resin and re-grinding. The finished melt must be uniform in concentration and temperature. The applied pressure must be great enough to squeeze out the viscous polymer.
The rubber extruder completes all the above processes through a barrel with a screw and auger. The plastic pellets enter the barrel through the hopper at one end of the barrel, and then are conveyed to the other end of the barrel by the screw. In order to have enough pressure, the depth of the flight on the screw decreases with the increase of the spacing to the hopper.
External heating and internal heat due to friction between the plastic and the screw soften and melt the plastic. Different polymers and different applications often require different design requirements for extruders. Many options involve discharge ports, multiple feed ports, special mixing devices along the screw, cooling and heating of the melt, or no external heat source (exhaust extruder), relative gap variation between screw and barrel size, and the number of screws, etc. For example, twin-screw extruders allow the melt to be more thoroughly mixed than single-screw extruders. Tandem extrusion is the use of a rubber extruder to extrude the melt as raw material to a second rubber extruder, usually used to produce extruded polyethylene foam
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