Fully hard screw HPT series: 1)HPT1 Wear resistant type: Apply to below 30% glass fibre, bakelite, PC lucency etc; 2)HPT2 Corrosion resistant type: Apply to below 60% glass fibre, heatproof, high-pressure proof and high-speed proof; PC+glass fibre, Nylon+glass fibre; 3)HPT3 Wear resistant and Corrosion resistant type: Apply to non-stick raw materials, magnetic powder, ceramic powder, Aluminum magnesium powder, iron powder, copper powder; 4) HPT4 Wear resistant and Corrosion resistant type: Apply to stickiness raw materials, halogen free plastics. |