Calculate the product weight first: W = product weight + gate system weight, where: W is the weight required for injection molding.
2. When the injection molding product is polystyrene (PS), the injection volume of the injection molding machine should be Wps; Wps = (1.3 ~ 1.1) × W (product weight + total weight of the gate system), when the product requirements are high, in the above formula The coefficient can take a large value, otherwise it can take a small value.
3. When the product is an imitation of other plastics (named X plastic), first calculate the theoretical injection volume of the plastic as Wx; Wx = (1.3 ~ 1.1) × (product weight + total weight of the gate system); then according to the plastic The density (X) is converted into the actual weight Wps of the PS material, and the conversion formula is: Wps=Wx×1.05/Vx
4. According to the calculation results of Wps and LOG manuals, select the appropriate injection molding machine.