Product parameters of high speed screw barrel for injection molding machine :
Alloy composition: tungsten carbide, nickel-chromium alloy ◆ Nitride depth: 0.5-0.8mm
◆ Nitriding hardness: HV≥950
◆ Nitride brittleness: ≤ 2nd level ◆ Surface roughness: Ra ≤0.4um
◆ Straightness: no more than 0.015mm
◆ Dual alloy hardness: HRC55-62; barrel alloy length is more than 600mm, using a unique process, the alloy layer is inlaid firmly and does not fall off.
◆ Dual alloy depth: ≥2mm
Injection screw works for a long time under high temperature, high pressure, high mechanical torque and high friction environment. The first few factors are required by the process conditions, and the wear caused by friction is unavoidable. Generally, the screw has been subjected to a surface nitriding treatment to improve the surface hardness, that is, to improve the wear resistance. However, if the cause of the wear is ignored, if we do not try to reduce the wear as much as possible, the working life of the screw will be greatly reduced.
The alloy barrel is a screw with a special alloy material protective layer on the screw top of the screw or the entire working surface of the screw. According to the different plastic raw materials of the screw barrel of the injection molding machine, different screw base materials and alloy powder are used. And craftsmanship. The alloy barrel is wear-resistant, corrosion-resistant, and high-temperature resistant alloy. Its effective service life is greatly improved than that of ordinary nitrided barrels. For the formula of processing PVC calcium powder with high wear life, the superiority of bimetal is particularly obvious.