Parallel twin-screw has the advantages of reasonable screw structure design, good plasticizing effect, high yield and stable extrusion. The screw edge surface of parallel twin-screw usually adopts double alloy spray welding with unique formula, which can effectively prolong the service life of screw. The parallel twin-screw has high torque and low energy consumption, which can effectively avoid defects such as black line and yellow line in the process of plate and sheet extrusion. There are many domestic manufacturers of parallel twin-screw, and the product quality is different. So, how to choose a good pair of parallel twin screw?
1. Look at the raw materials for screw production. High quality screw is made of high quality raw materials, which can provide continuous, stable, high yield and strong damage resistance.
2. Look at the screw surface treatment. Good screw surface is usually sprayed with nickel base alloy powder or tungsten carbide alloy powder, which can greatly improve the wear resistance and prolong the service life of the screw.
3. Look at the production process. A good pair of parallel twin-screw rod must go through multiple heat treatment process. Such as: quenching and tempering, tempering, qualitative, nitriding treatment, etc., in order to meet the technical requirements.
4. Look at the R & D capability of manufacturers. The parallel twin screw production enterprises with strong R & D ability usually can fully introduce and absorb the advanced screw structure at home and abroad. According to the specific requirements of customers, the original design is improved to achieve low energy consumption, high quality and high output.
5. Look at the screw production technology of the manufacturer. Usually, high-quality parallel twin-screw is processed by high-precision special CNC screw milling machine, which can ensure that similar extrusion equipment has the same height.
6. Look at the manufacturer's service. Generally, well-known manufacturers can provide considerate and meticulous services for customers, and users can require customized services from manufacturers according to their own needs. Well known manufacturers have guaranteed product quality, high output and considerate after-sales service.