Detailed introduction





What are the advantages of alloy screw?



What are the advantages of alloy screw?

Screw materials commonly used in China are 45# steel, 40Cr, ammoniated steel, 38CrMOAl, high temperature alloy, etc. 1) No. 45 steel is cheap and has good processing performance, but it has poor wear resistance and corrosion resistance. So, what are the advantages of alloy screw?

  alloy screwWhat are the advantages?

1. High reliability 3360 screw air compressor has few parts, few wearing parts, reliable operation and long service life.

2. Easy to operate and maintain. 360 operators can achieve unattended operation without long-term professional training. The operation is relatively simple, and the air can be supplied according to the required displacement.

3. Good power balance. 360 screw air compressor has no unbalanced inertia force, the machine runs smoothly and at high speed, and it can run without foundation. Especially suitable for use as a mobile compressor, small size, light weight, small footprint.

4, strong adaptability. The 360 screw air compressor has the characteristics of forced air supply, and its displacement is almost not affected by the exhaust pressure. Stable operation, small vibration, stable exhaust, high efficiency in a large range.

5. In fact, 3360 there is a gap between the rotor tooth surfaces of the screw air compressor, it can withstand the impact of liquid and can compress gases such as liquid, dust and easily polymerized gas.

6, the unit displacement is small, save land.

alloy screw how maintenance?

1. Disassembly of double alloy screw nozzle of injection molding machine

If there is any leftover material in the barrel, it should be heated to the plasticizing temperature first, and cleaned at high speed with polyolefin resin with high thermal stability or special cleaning material for the barrel. The leftover material can be discharged as much as possible before disassembly. Since it is not always possible to discharge all the remaining material at the nozzle, the nozzle or barrel head should be heated before the nozzle is disassembled. After the injection nozzle of the double alloy screw of the injection molding machine is heated, it is gently knocked with a special hammer to loosen it. The bolts should not be completely loosened. Tap gently when it is placed to 2/3, and then remove the nozzle after the internal gas is released. The internal cleaning of the double alloy screw nozzle of the injection molding machine should be carried out at high temperature while it is hot, so as to remove the residual melt in the runner from the nozzle hole. The method is to inject the release agent from the nozzle into the inside, that is, drop the release agent between the material and the inner wall from the threaded side of the nozzle, separate the material from the inner wall, and then remove the material from the nozzle.

2. Double injection molding machinealloy screwMaintenance of Nozzle

In the production, when the nozzle and the mold positioning sleeve are in unilateral contact or poor contact, the spherical R part at the front end will be deformed to form a groove for the melt to escape, resulting in the flash at the nozzle and the deformation of the diameter part. The flash should be inspected and repaired in time.

3. Regularly check the thread of the nozzle.

Check the integrity of key components and the sealing surface on the cylinder side. If serious wear or corrosion is found, it should be replaced in time.

4. Check the internal channel of the double alloy screw nozzle of the injection molding machine.

The surface quality of the injected melt band can be observed by air injection molding, and the residual melt discharged from the nozzle can more accurately reproduce the flow channel conditions in the nozzle. Therefore, the residual amount and temperature distribution of the molten material in the nozzle can be analyzed.

What is an alloy screw?

The alloy screw is made of high-quality alloy steel (38CrMOALA) or chrome-molybdenum alloy steel black cross (SACM645) by tempering, shaping, fine grinding, alloy (bimetal) surface nitriding or spray welding, polishing and other processes, with high wear resistance, The advantages of corrosion resistance. Suitable for glass fiber, plastic, PPA, PO, PPS, LCP, ABS, phenolic molding compound, magnetic powder, PC and other special engineering plastics.