Twin-screw Granulator Material Silo Structure Type Sharing

The twin-screw granulator barrel is the main component of the extruder. The barrel and the screw work together, the barrel accommodates the screw, and the screw rotates in the barrel. When the screw rotates to push the plastic forward in the barrel, the outside of the barrel heats up and transfers heat to the plastic inside the barrel. In addition, the thread capacity on the screw gradually decreases, causing the plastic in the thread groove to be squeezed. Under the action of multiple forces such as rotation and cutting, it is evenly mixed.

Structural type of twin-screw granulator barrel feeding hopper:

1. Vibrating silo:

 

Its structure is relatively simple. It only adds an electromagnetic vibrator to the ordinary silo. When the barrel needs to be fed, the vibrator is started to make the bin vibrate horizontally. Then, the raw materials in the silo overcome the frictional resistance between the silo wall and the material, and drop and enter the barrel while shaking.

2. General silo:

 

compact structure. Low-cost silo is mainly used for feeding barrels of small extruders. The feeding method of this kind of silo relies on the weight of the powder itself to fall freely into the barrel.

3. Forced material warehouse:

 

It is mainly used for feeding large extruders or materials. The spiral is driven by a motor through a worm gear reduction, and a torsion spring at the upper end exerts a certain pressure on the spiral, so that the raw material is pressed into the barrel when the spiral rotates. When the material in the barrel is full, the reverse pressure of the pressure raw material will lift the screw and terminate the feeding of the barrel. When there is no raw material in the barrel, the spiral is also pressed down by the spring and continues to rotate to feed the barrel.

Twin-screw granulator barrel requirements:

Made of corrosion-resistant and wear-resistant alloy steel.

The blank should be forged and formed; the barrel should be quenched and tempered after initial processing; after mechanical processing, the thickness should be uniform, and the processing accuracy of the inner hole should meet the requirements; the roughness of the inner hole surface should not be too large after finishing; the inner hole surface should be nitrided, The depth of the nitride layer should be within the range.