Zhoushan injection molding machine alloy screw <br /> Application: Extrusion machinery, tapered / parallel twin screw, tube processing range: diameter φ35 / 75-φ92 / 188mm
Nitriding depth: 0.4mm-0.7mm
Nitriding hardness: HV960 ° -1040 ° or moreStraightness: 0.015mm / 1000mm
Chrome plating thickness: 0.02mm-0.20mm
Zhoushan injection molding machine alloy screw <br /> Applicable scope: ordinary plastic, PP, PE, ABS, PVC, raw material granulation, production pipe, profile, sheet, etc.
Φ45 / 90 Φ45 / 100 Φ50 / 105 Φ51 / 105 Φ55 / 110 Φ60 / 125 Φ65 / 120 Φ65 / 132 Φ68 / 143 Φ70 / 140 Φ75 / 150 Φ80 / 143 Φ80 / 156
The Φ92 / 188 screw compression ratio can be designed according to different products and different formulas.
38CrMoALA (JIS SACM645)
Causes of alloy screw wear of Zhoushan injection molding machine and methods of reducing wear
1. Each plastic has an ideal plasticizing processing temperature range, and the barrel processing temperature should be controlled to bring it closer to this temperature range. When granular plastic enters the barrel from the hopper, it will first reach the feeding section. Dry friction will inevitably occur in the feeding section. When these plastics are insufficiently heated and unevenly melted, it is easy to cause increased wear on the inner wall of the barrel and the surface of the screw. Similarly, in the compression section and the homogenization section, if the molten state of the plastic is disordered and uneven, the wear will also increase.
2. Speed should be adjusted properly. Because some plastics are added with reinforcing agents, such as fiberglass, minerals or other fillers. The friction of these materials on metallic materials is often much greater than that of molten plastic. In the injection molding of these plastics, if it is made with a high speed, it will not only increase the shear force on the plastic, but also cause the reinforcement to generate more shredded fibers. The shredded fibers contain sharp ends, which will cause abrasion. The force is greatly increased. When inorganic minerals glide on the metal surface at high speed, its scraping effect is not small. Therefore, the speed should not be adjusted too high.