Introduction
A four-shaft shredder is a machine to reduce waste materials to homogeneous particle sizes whether as a stand-alone solution or as part of a recycling system. It combines the reliability and power of double-shaft shredders with control over the output particle size.
A four-shaft shredder can tear and break down material efficiently without an auxiliary pressing mechanism and is suitable for frame-shaped waste and tough materials. The function of the two upper cutters on the four-shaft shredder is to clean the shafts below and at the same time provide a certain amount of shearing force.
The size of the output material is controlled by the screen. After the material is cut once, the material with a smaller particle size than the hole of the screen is discharged from the lower part of the box under the action of gravity and squeezing pressure, while the material with a larger size than the hole of the screen is guided by the main cutters and the secondary cutters to return to the inner surface of the screen for the second cutting, and so on until the material can be discharged from the hole of the screen.
Advantages
In the solid waste recycling industry, the four-shaft shredder has great advantages.
Cutter
The blades are made of wear-resistant special alloy steel and are designed for convenient replacement and maintenance. The spindles are made of 42CrMo high-alloy steel and undergo multiple manufacturing processes for high mechanical strength, fatigue resistance, impact resistance, and a long service life.
Screen
The four-shaft shredder is equipped with a sieve at the bottom of the crushing chamber to circulate the material until the required particle size is reached.
Drive system
Two motors and a heavy-duty planetary reducer provide low-speed, high-torque operation for effective crushing and tearing.
Bearing
The bearing has a quadruple sealing protection design which makes it dustproof and waterproof, effectively prolonging the service life of the bearing and suitable for harsh working environments.
Automatic overload protection
A preset current limit triggers automatic rotor reversal when an overload or material jam is detected, helping protect the motor.
PLC control system
The electric cabinet is equipped with a Siemens/Schneider PLC. The PLC control system supports real-time monitoring, fault alarms, remote diagnostics, and data analysis.
Applications
Four-shaft shredders are widely used in the treatment of various types of industrial waste, including but not limited to the following areas:
+Barrel products: plastic barrels, metal barrels, paint barrels, IBC barrels, trash cans, etc.
+Solid waste: bulky waste, domestic waste, industrial waste, garden waste, etc.
+Plastic products: plastic pallets, plastic bottles, plastic frames, plastic blocks, plastic containers, etc.
+Metal products: aluminum alloy, waste aluminum castings, oil filters, car shells, cans, etc.
+Paper: newspapers, cardboard, corrugated paper, copy paper, etc.
+Electronic appliances: refrigerators, circuit boards, TV shells, small appliance shells, CDs, etc.
+Glass products: glass wool, glasses, glass bottles, etc.
+Paper mill waste: paper mill light residue, paper mill rope, paper mill scraps, etc.
Conclusion
Four-shaft shredders use an innovative design to provide efficient and flexible processing.
They combine the features of double-shaft shredders with wear-resistant screens, which significantly reduces operating and maintenance costs.
And they can be designed according to the user’s requirements and the materials to be processed to maximize the user’s benefit.
