The shredder is crucial for the solid waste recycling industry, significantly enhancing its efficiency. When selecting shredder equipment, it's important to base your decision on the material you need to crush, considering its characteristics and the degree of ease of shredding. Many newcomers to shredders often can't distinguish between them. Today, we will clarify the distinctions between single-shaft and double-shaft shredders.

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(1) Structure Differences

A single-shaft shredder consists mainly of one spindle with a shredding blade group, a fixed knife, a box, a feeding system, and a power system. The single shaft rotates to drive the knife, which shreds the materials slowly, resulting in higher energy consumption and smaller shredded pieces compared to a dual-axis shredder.

A double-shaft shredder includes two spindles with shredding blade sets, a box, a feeding system, and a power system. The two knife rollers work together to tear, extrude, and shear materials into smaller pieces. The machine is larger than a single-shaft shredder, produces relatively larger finished pieces, and consumes less energy.

(2) Knife Type Differences

The single-shaft shredder features only one dynamic shaft with blades installed on it, operating in conjunction with a fixed knife to create a shearing effect.

The multi-shaft shredder has two dynamic axes, each equipped with blades. These axes rotate relative to each other, similar to the single-shaft shredder operation.

(3) Operational Principle Differences

In a single-shaft shredder, the dynamic knife interacts with the fixed knife, using a screen to control the material size. Materials are pushed to the blade rotor for crushing, creating significant shear force and ensuring high output.

In a double-shaft shredder, two rotating knives shear and tear materials. It uses dual motors and reducers providing strong power and stable operation.

(4) Differences in Material Processing

Single-shaft shredders are used for solid, smaller objects, processing materials to a smaller size in one go. They can be applied widely due to replaceable screens, suitable for cans, trays, aluminum products, etc.

Double-shaft shredders, with high torque and efficiency, handle a large number of hollow and light plastics like PE film, PP pipe, rubber tires, auto parts, and electronic waste.

Overall, double-shaft shredders have broader applicability and are more widely used. They are suitable for larger scale processing and adapting to different materials and shredding requirements. Meanwhile, single-shaft shredders produce smaller shredded pieces and are more targeted for specific applications. Customers must carefully understand their needs before purchasing to choose the right equipment.

What is the Difference Between single shaft shredder and double shaft shredder

Time:0000-00-00 00:00:00 Author:Suny Group

In our daily lives, common shredders include single-shaft and double-shaft types. Many users do not fully understand their usage and performance, which can lead to purchasing the wrong shredder and causing unnecessary trouble.

The primary difference between single and double-shaft shredders:

The most significant difference is that a single-shaft shredder has one knife stick, while a double-shaft shredder has two knife rollers.

The single-shaft shredder has one moving shaft with blades, interfacing with a fixed knife to form a shearing effect. The motor and reducer drive the main shaft, guiding material through the gap between the movable and static knife.

The double-shaft shredder functions similarly to a single-shaft metal shredder but features two moving shafts with blades. These shafts rotate relative to each other, pressing, tearing, and shearing materials for effective shredding. It is equipped with two powerful motors, making it suitable for larger, harder materials.

The single-shaft shredder uses a motor with smaller power consumption, better suited for small recycling plants with limited processing capacity. In contrast, the double-shaft shredder, with two high-power motors and reducers, has high efficiency and large output, ideal for customers with higher processing and finished product requirements.

The shredder's working principles:

The single-shaft shredder uses a cutter head to cut, tear, and pull materials. The direct-connected worm gear motor is mounted directly on the driving shaft, transmitting power to the driven shaft via gear transmission. The staggered spiral tooth cutter discs on the driving shaft compress, tear, and shear the material as it enters, breaking it into smaller pieces. High-speed rotating impellers can further break down long metal scraps.

The double-shaft shredder features two relatively rotating rollers with spiral gears. Material entering the machine is torn and crushed by the staggered high-hardness, wear-resistant gears before being expelled. The knife roller, driven by a motor through a high-torque reducer, can handle harder materials by reversing under PLC control until the material is adequately broken down.

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