How to choose the right conical screw barrel according to different processing requirements?

In the field of plastic processing, the conical screw barrel is one of the key components that affect product quality and production efficiency. However, due to the diversity of processing materials, process parameters and end product requirements, it is not easy to choose a suitable conical screw barrel. Understanding different processing requirements and selecting suitable products in a targeted manner is the key to improving production efficiency and reducing operating costs.
Analyze the characteristics of processing materials
Different plastic materials have different performance requirements for conical screw barrels. For example:
Highly abrasive materials: When processing glass fiber reinforced plastics, the screw and barrel need to have extremely high wear resistance. At this time, it is recommended to choose a screw made of dual alloy materials.
Highly corrosive materials: When processing corrosive materials such as PVC, screws and barrels made of nickel-based alloys or corrosion-resistant treatments should be selected.
Thermosensitive materials: For processing thermosensitive plastics such as PET and PC, a screw design with good temperature control capabilities should be selected to avoid material decomposition.
According to the characteristics of different materials, the reasonable selection of screw materials and surface treatment processes can effectively extend the life of the equipment and maintain the consistency of product quality.
Consider the needs of the production process
The requirements of the production process determine the design parameters of the screw. For example:
High production capacity requirements: For large enterprises that need to produce quickly, you can choose a screw design with a high compression ratio and a moderate aspect ratio to improve the melting efficiency and conveying speed of the material.
High precision requirements: For products that require strict control of dimensional tolerances, the design of the screw should pay more attention to the uniformity of shearing and mixing to reduce errors during processing.
Special processes: Some special processes, such as multi-layer co-extrusion, require a segmented screw design to meet the processing requirements of different materials.
Evaluate the compatibility of equipment
Different production equipment has strict requirements on the size and structure of the screw and barrel. Before selecting, you need to confirm:
Whether the diameter and aspect ratio of the screw are compatible with the existing equipment.
Whether the inner wall of the barrel matches the outer diameter of the screw.
Whether the power system can meet the torque and speed requirements of the screw design.
By comprehensively evaluating the compatibility of the equipment, production problems caused by size mismatch or insufficient power are avoided.
Focus on energy saving and environmental protection needs
As environmental regulations become increasingly stringent, energy saving and environmental protection have gradually become important considerations in model selection. High-efficiency and energy-saving screws can reduce energy consumption during processing and reduce waste generation by optimizing melting and conveying efficiency. This not only meets environmental protection requirements, but also significantly reduces the operating costs of enterprises.