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Do You Know The Working Principle Of Plastic Crusher Machines?

2025-03-31

The working principle of plastic crusher machines mainly includes the interaction between moving knife and fixed knife. The core part of plastic crusher is crushing chamber, which is composed of solid metal shell, providing a closed and safe space for crushing plastic. In the crushing chamber, a tool system is installed, including moving knife and fixed knife. Moving knife is usually installed on the rotating spindle, with various shapes, such as rectangular knife, circular knife, serrated knife, etc. The moving knife rotates at high speed driven by the motor, exerting strong shear force and impact force on the plastic entering the crushing chamber. The fixed knife is fixed on the inner wall of the crushing chamber, and cooperates with the moving knife to form a shearing area. When the plastic is sent into the crushing chamber, it is cut and torn into smaller pieces under the joint action of the moving knife and the fixed knife.

Crusher Machines

The main structure of plastic crusher machines includes the following parts:


Crushing chamber and tool system: This is the core part of plastic crusher, providing a closed and safe space for crushing plastic. The tool system includes a moving knife and a fixed knife.


The moving knife rotates at high speed driven by the motor to cut and tear the plastic; the fixed knife is fixed on the inner wall of the crushing chamber and works with the moving knife.

Motor and transmission system: The motor is the power source of the plastic crusher ad provides the power required for the rotation of the knife. The transmission system transmits the power of the motor to the moving knife on the main shaft.


Common transmission methods include belt drive, coupling drive and gear drive.Feeding and discharging device: The feeding device is responsible for conveying the waste plastic into the crushing chamber. Common feeding methods include hopper feeding and conveyor belt feeding. The discharging device is responsible for discharging the crushed plastic particles.The types and applications of plastic crushers are mainly divided into the following three categories:  


Hard plastic crusher machines: Suitable for crushing and recycling of ABS, PE, PP and other plates. Its unique rectangular feeding port is convenient for the input of long strips of plate materials, improving work efficiency.


Powerful plastic crusher machines: suitable for crushing plastic products such as sheets, pipes, profiles, plates and packaging materials. Adopting alloy steel blades, the product is evenly granulated.


Plastic pipe plastic crusher machines: suitable for crushing and recycling small and medium-sized plastic pipes such as PE and PVC pipes. Its round pipe feeding port is convenient for the input of long strips of pipe materials.


Only by understanding the principle and structure of the plastic crusher can we better choose and apply the crusher of the right model.



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