1. The modulus, both the length * width * height of the mold, choose the specific specifications of the mold suitable for factory products and slightly larger than the mold, which is the effective spacing within the Golling column;

2. The injection amount is generally calculated by the plastic material PS, the unit is ounces (oz), because the PS density ratio is a vertical centimeter specific gravity is 1.05g, this is a conventional calculation unit. Different plastics have different structural density ratios, so the net weight of the product should be selected based on the weight of the product. The most effective injection amount of the injection molding machine is not more than 80% and not less than 20% as the suitable model;

3. Product accuracy. The accuracy of plastic products is directly related to the purchase and configuration requirements of the machine. For example, engineering plastics must use alloy screws and tubes, and the screw L / D ratio must be more than 20 times. Meet good plasticization standards and requirements. Depending on the precise requirements of the product, specific pressure + specific flow or semi-closed loop or full closed loop oil circuit control can be selected;

4. Clamping force This is the most important part of the injection surface. The clamping force is expressed in units of ton (T). The standard for selecting the clamping force is the length * width * resistance of different plastics.