What are the factors that influence mold structure and mold individual system?
And this is the distribution of the radial distribution.According to the geometric structure characteristics of plastic parts, size precision requirements, batch size, mold manufacturing difficulties, mold cost and other factors to determine the number of cavity and its arrangement.For injection mold, the precision of plastic parts is grade 3 and grade 3a, and the mass is 5g. The hardened pouring system is adopted, and the number of cavity is 4-6.Plastic parts are of general precision (grade 4-5), forming materials are local crystalline materials, and the number of cavity can be 16-20.The quality of plastic parts is 12-168, and the number of cavity is 8-12.The plastic parts with a mass of 50-100g are manufactured. The number of cavity is 4-8.It is recommended that there are 24 to 48, 16 to 32 and 6 to 10 cavities for unshaped plastic parts.When the quality of plastic parts continues to increase, the use of multi-cavity molds is rare.The maximum number of cavities of plastic parts with grade 7-9 precision increased to 50% compared with the indicated grade 4-5 precision plastics.
Further more, the typing surface is determined.The position of the parting surface should be conducive to mold processing, exhaust, demoulding and molding operations, surface quality of plastic parts, etc.
The gating system (shape, position, size of the main runner, runner and gate) and the exhaust system (exhaust method, exhaust slot position, size) are determined.
In order to determine the side concave processing method and core drawing method, the top rod, top pipe, push plate and combination top out method is chosen.
Flow determines the cooling, heating and heating mode, but the shape, position of the groove, and installation of the heating element.
Based on the mold material, strength calculation or empirical data, determine the thickness and dimensions of the mold parts, the contour structure, and the position of all the connections, positioning and guide parts.
The structural form of major parts and structural parts is determined by using the tool.
Considering the strength of each part of the mould, calculate the working size of the molding part.
If the above problems are solved, the structure of the mould will be solved naturally.At this point, you should begin to sketch the mold structure and prepare for the formal drawing.