English
The gears of the SZL Series Gearbox Plastic Special Reducer are crafted from premium high-strength alloy steel, ensuring exceptional durability and load-bearing capacity. These gears undergo a meticulous carburizing and quenching heat treatment process,
The gearbox housing is constructed from high-quality ductile iron, renowned for its robustness and resistance to deformation. After casting, the housing undergoes a comprehensive stress-relief treatment, enhancing structural integrity and ensuring reliable operation in high-torque environments.
| Item | Parameters |
| Power | 22-110 |
| Gear Speed | 37-39 |
| Maximum output torque (kN.m) | 13.13 |
High Torque and Load Capacity: Achieves significant torque multiplication through gear reduction, enabling it to handle heavy loads in twin-screw extruders. The design leverages the steady transmission and high loading capability of conical gears, making it ideal for demanding plastic extrusion tasks.
Precision and Durability: Gears are made from high-strength alloy steel, processed via carburizing, quenching, and precision grinding to achieve Grade 6 accuracy (per GB10095.1-2008) and tooth flank hardness of HRC54-62. This results in long service life, minimal wear, and reliable operation under continuous use.
Compact and Efficient Design: Features a vertical layout with integrated reduction and distribution components, saving space while ensuring smooth power transmission. Efficiency is enhanced by the 1:1 bevel gear ratio, reducing energy loss and supporting high output speeds.
Low Vibration and Noise: The helical and spiral gear configuration minimizes backlash and axial forces, promoting stable, quiet operation—crucial for precision plastic molding and extrusion.
Versatile Installation and Maintenance: Supports horizontal or vertical mounting options, with thrust bearings to handle screw back pressure. It includes 100% self-inspection before packing and a standard 12-month warranty, with easy access for lubrication and servicing.
1.What is the SZL Series Gearbox used for?
The SZL Series is a dedicated mechanical transmission device for conical twin-screw plastic extruders. It reduces motor speed, amplifies torque, and distributes power to two output shafts (mirroring the screw configuration) for efficient plastic processing in extrusion lines.
2.What are the key components of the SZL Series Gearbox?
Reduction Gearbox: Handles speed reduction and torque increase from the input motor.
Distribution Gearbox: Uses a pair of small-angle helical bevel gears (1:1 ratio) to drive the twin output shafts. Gears and shafts are typically made from high-strength alloy steel, carburized, quenched, and ground to precision Class 6 (GB/T 10095.1-2008), with tooth hardness of HRC54-62.
3.What materials are used in construction?
Gears and Shafts: High-strength alloy steel (e.g., 20CrMnTi), carburized and precision-ground.
Housing: High-strength cast iron for durability.
Bearings: Domestic or imported thrust bearings to handle axial loads from screw backpressure.
4.How do I select the right SZL model for my extruder?
Required output torque.
Output speed.
Motor parameters (power, RPM).
Extruder screw diameter and material type. Engineers can assist; for example, SZL65 suits smaller extruders (e.g., 65mm screws), while SZL92 handles larger industrial setups.
5.What is the warranty and service life?
Warranty: 12 months under normal operating conditions.
Service Life: Up to 20 years with proper maintenance, thanks to hardened components and robust design.
