Mini Double Shaft Shredder for Waste Recycling

A mini twin-shaft shredder is a piece of equipment that breaks down materials through the opposing shearing action of two shafts. It is suitable for the pre-treatment of various solid waste materials, such as plastics, rubber, and electronic waste. Its primary function is to reduce large chunks of material into uniform sizes, facilitating subsequent sorting, cleaning, or reuse, whilst significantly improving overall recycling efficiency and reducing labour costs.

I. Equipment Structure and Working Principle

The core of the mini twin-shaft shredder lies in its ‘twin-shaft + blade’ shearing structure. The equipment is fitted with two low-speed, high-torque shafts internally, with blades manufactured from high-strength alloy steel, driven by motors to rotate in opposite directions. When material enters the shredding chamber, it is subjected to multiple forces of tearing, shearing, and compression, gradually breaking it down into smaller pieces.

Compared to high-speed shredding equipment, the advantage of this type of machine lies in its low-speed operation, which minimises dust generation and excessive heat build-up, whilst offering superior adaptability to tough materials (such as plastic film and cables). Furthermore, the equipment is typically fitted with a gearbox and an overload protection system, effectively preventing material jams or damage to the blades caused by hard objects.

II. Processing Capacity and Scope of Application

The processing capacity of this equipment ranges from 50 to 200 kg per hour. It can be configured and adjusted to suit the cutter shaft size, motor power, and material type, making it particularly suitable for small- to medium-scale recycling operations or front-end pre-treatment stages.

It has a wide range of applicable materials, including but not limited to:

Plastic products (bottles, shells, offcuts)

Waste electrical wires and cables

Rubber and tyre shreds

Light metals and electronic waste

In practical applications, it typically serves as the first stage in a production line, supplying uniformly sized feedstock to subsequent sorting equipment (such as air classification, magnetic separation, or density sorting), thereby directly influencing the overall separation efficiency and purity of the final product.

III. Key Factors in Equipment Selection and Pricing

Many users focus solely on price, which is a common misconception. Cost variations in shredders primarily stem from the following key factors: the material of the cutting blades and the heat treatment process determine service life; the brand of the gearbox and motor affects stability; and the overall structural design of the machine influences the failure rate during long-term operation.

If the material to be processed is complex (for example, containing metallic impurities), it is advisable to prioritise the wear resistance of the cutting blades and the torque of the equipment, rather than simply pursuing the lowest price; otherwise, maintenance costs will escalate rapidly in the long run. For initial projects, modularly designed equipment can be selected to facilitate future capacity expansion.