Choose the ideal structure is to determine the necessary molding equipment, the ideal number of cavities, in absolute reliable conditions can make the mold itself work meet the plastic product technology and production requirements. Technical requirements on the plastic products is to ensure that the plastic parts of the shape, surface finish and dimensional accuracy. Require the production of economy is to make the plastic parts of the low cost, high production efficiency, mold continuous working, long service life, save labor. In the determination of mold structure is mainly to solve the following problems.
1.plastics molding position and parting surface. The place of the parting face to mold processing, exhaust and forming operations, plastic stripping and the surface quality of the part.
2.Determine the mold cavity number The number of mold cavity determine out of sync with the design of gating system and exhaust system.
3.Structure to determine the main molding parts, structural parts.
4.Design of side parting and core pulling mechanism.
5.select the plastic parts of the launch mode.
6.pull rod type selection.
7.Design of mold shape structure and all connected, positioning, guide position.
8.determine the cooling, heating and heating cooling groove shape, position, the heating element of the installation site.
  In addition, including the calculation of die structure design: Calculation of the working dimensions of the forming parts; main sprue, runner and gate size calculation; according to the mold material, strength calculation and empirical data, determine the wall thickness and the thickness of bottom mold parts; calculating the die heating or cooling system design calculation of relevant agencies; calculation, such as side parting and core pulling mechanism.