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Twin Screw Extruder Extruder Important Parts
- Sep 05, 2017 -

Twin Screw Extruder Extruder important parts

The twin screw extruder barrel is the same as the extruder in the extrusion press system and is an important part of the extruder. Barrel and screw with the work, the barrel contains the screw, the screw rotation in the barrel. When the screw rotation to promote the movement of plastic in the barrel forward, the heat from the outside of the barrel to heat the tube to the plastic, coupled with the screw on the screw volume gradually reduced, so that the thread groove of the plastic by the squeeze, Cut and other forces after the role of uniform mixing plastic, with the front of the barrel to move at the same time, gradually melt was viscous flow, to complete the plastic plastic. Barrel and screw with the normal work to ensure that the extruder continuous extrusion molding raw materials production.

    Twin-screw extruder barrel for the use of hopper structure of the structure is more common use of ordinary hopper, forced feeding hopper and vibration feeding hopper.

    1, ordinary hopper

    Ordinary hopper. This simple structure, low cost hopper used in a small extruder for the barrel for the feed. This hopper feeding method is to rely on the weight of the pellets itself, free fall into the barrel. Therefore, the work also pay attention to avoid the raw material in the hopper in the "bridge" phenomenon, affecting the continuous production of extruder production.

    2, forced hopper

    Forced hopper feed applications are used in large extruders or extruded materials for powder applications. The helix is driven by the motor through the worm gear, and the upper end has a spring to apply a certain pressure to the screw so that the screw rotates the material into the barrel. When the barrel material is full, the pressure of the pressure of the raw material to spiral up, stop the barrel feed. When there is no raw material in the barrel, the spiral is pressed by the spring force, continue to rotate for the barrel supply.

    This forced feeding mode, to avoid the hopper in the raw materials produced by the "bridge" phenomenon, to ensure that the hopper for the machine for continuous feeding, to ensure continuous production of extruder production.

    3, vibration hopper

    Vibrating feed hopper structure is relatively simple, but in the ordinary hopper plus an electromagnetic vibrator. When the barrel needs to feed, start the vibrator, so that the hopper in the horizontal direction of the jitter, the hopper in the raw material to overcome the hopper wall and material and the friction between the material resistance, a move in the jitter and into the barrel.