Maintenance precautions for screws: 1. Do not start the machine when the screw has not reached the preset temperature. 2. To prevent metal fragments and debris from falling into the hopper, if processing recycled materials, a magnetic hopper needs to be added to prevent iron filings from entering the barrel. 3. When using anti saliva, it is important to ensure that the plastic inside the barrel is completely melted to prevent damage to the transmission system components when the screw moves back. 4. When using new plastic, the remaining material of the screw should be cleaned thoroughly. 5. When the temperature of the molten plastic is normal but black spots or discoloration are continuously observed, the rubber screw should be checked. During processing, try to make the material plasticize evenly and avoid mixing metal foreign objects into the material to reduce the torque force of the screw rotation.

This type of equipment has a long service life, and the screw plays an important role in rough machining of larger threads. But some people have questioned its service life, whether this life can be calculated. Therefore, friction heat generation may occur, and sliding surfaces are used to support the load during operation. During this process, the sliding surface may also experience wear. The PV curve defines the safe operating range of load and speed. When the load increases, the speed should be reduced to avoid overheating and wear. When the load is small, high screw rotation speed can be achieved, while when the load is large, the screw needs to run slowly. It should be noted that without increasing the speed, the linear speed of the screw can be improved by increasing the lead of the screw.

Support methods for screw: According to the arrangement of thrust bearings, there are four support methods for screw. The "double push one free" method is suitable for short lead screws. The support method of the lead screw is "single push, single push" or "double push, single push". Its advantage is that it can pre stretch and install the lead screw. The "double push and one support" method can avoid the bending of the screw due to its own weight and the shaking of the free end during high-speed rotation. The excessive deformation of the nut seat, the bearing at the end of the lead screw, and their support processed under stress will affect the transmission stiffness of the feed system.

The trapezoidal screw product is actually easy to adjust based on specific applications to achieve expected performance while controlling cost limits. Moreover, the processing of trapezoidal screw threads, threads, and knurling belong to products with high one-time completion technology, low cost, and low processing accuracy requirements. More suitable for large-scale thread rough machining. This is completely different from ball screws. The main function of ball screws is to convert rotational motion into linear motion, or to convert torque into axial repeated force, converting rotational motion into linear motion. This is the further extension and development of screws, and the important significance of this development is to transform bearings from sliding motion to rolling motion.