Eight elements that affect the structure of the wire drawing die. There are many factors that affect the structure of the wire drawing die and the individual systems of the die, which are very large:

1. Cavity placement. According to the geometric characteristics of the plastic parts, dimensional accuracy requirements, batch size, mold manufacturing difficulty, mold cost, etc., determine the number of cavities and their arrangement. For the injection mold, the accuracy of the plastic parts is 3 and 3 a, the weight is 5 g, the hardening gating system is accepted, the number of cavities is 4-6; the plastic parts are general precision (4-5). The molding material is partially crystalline material, the number of cavities can be 16-20; the weight of plastic parts is 12-16 grams, the number of cavities is 8-12; and the weight of plastic parts is 50-100 grams, the number of cavities Take 4-8. For amorphous plastic parts, the recommended number of cavities is 24-48, 16-32 and 6-10. When the weight of the plastic part is continued to increase, the multi-cavity mold is rarely accepted. For plastic parts with a precision of 7-9 grades, the maximum number of cavities is increased to 50% compared to the indicated accuracy of 4-5 grades.

2. Determine the parting surface. The location of the parting surface should help mold processing, venting, demoulding and forming operations, and the surface quality of plastic parts.

3. Determine the gating system (the shape, position, and size of the main runner, split runner, and gate) and the exhaust system (the method of exhaust, the location and size of the vent).

4. Select the ejector mode (top rod, top tube, push plate, combined ejector) to determine the undercut treatment method and core pulling method.

5. Determine the shape and position of the cooling, heating method and heating and cooling grooves, and the mounting location of the heating element.

6. According to the mold material, strength calculation or empirical value, determine the thickness and shape of the mold parts, the shape structure and the position of all connections, positioning and guides.

7. Determine the structural form of the main molded part and structural part.

8. Consider the strength of each part of the mold and calculate the molded part.