Tool Steel Supplier

The plastic injection moulding process produces large numbers of parts of high quality with great accuracy, very quickly. Plastic material in the form of granules is melted until soft enough to be injected under pressure to fill a mould. The result is that the shape is exactly copied. Once the plastic moulding has cooled sufficiently to harden the injection mould opens releasing the part. The whole injection moulding process then repeats. CLOSE MOULD CLAMPING – the moving and fixed platens of the injection moulding machine hold the mould tool together under pressure. INJECT MOLTEN PLASTIC INJECTION – the molten plastic that has been melted from pellet form in the barrel of the moulding machine is injected under pressure into the mould. HOLD MOULD CLOSED DWELLING – after the molten plastic has been injected into the mould, the pressure is applied to ensure all cavities are filled. COOLING – the plastic parts are then allowed to solidify in the mould. OPEN MOULD &...

Basic properties that cutting must posses are: Tool material must be at least 30 to 50% harder than the work piece material. Tool material must have high hot hardness temperature. High toughness High wear resistance High thermal conductivity Lower  coefficient of friction Easiness in fabrication and cheap Different elements used in cutting tool materials and their properties are Element Properties Tungsten Increases hot hardness Hard carbides formed Abrasion resistance Molybdenum Increases hot hardness Hard carbides formed Improving resistance Chromium Depth hardenability during heat treat hard carbides are formed improving abrasion resistance some corrosion resistance Vanadium combines with carbon for wear resistance retards grain growth for better toughness Cobalt Increases hot hardness, toughness Carbon Hardening element forms carbides Different cutting tool materials used for cutting operations in practice are high carbon steel, high speed steel, non -f...