The mold manufacturing process is a complex process. From design, processing, assembly, debugging and other steps, it can be put into use at the end. In the entire life cycle, the factors that affect mold quality mainly include the following ten aspects:
1. Mould steel
Several commonly used steels
Steel is the decisive factor of mold quality, and choosing a reasonable steel is the top priority. The criteria for selecting steel are:
①Requirements for injection molding materials—different plastics should use different steels, such as high polishing requirements, corrosion resistance requirements, etc.;
②Price—the steel can be used, not the more expensive the better; considering the cost factor of the mold, the mold steel should choose the material corresponding to the mold life to avoid unnecessary waste; generally the life of P20 is about 300,000; 2738 , 500,000 is no problem, H13/2344 is usually more than 800,000-1,000,000, you can choose according to the situation;
③ Heat treatment. The surface treatment of the mold is also very important. Nitriding-can enhance the surface hardness of steel and effectively extend the life of the mold; electroplating-can effectively modify the mold steel, and for some plastic parts that require high brightness and corrosion resistance, electroplating can be used to enhance and improve the performance of the steel
2. Structural design
Mold structure design
The mature mold structure not only considers the product material properties-shrinkage rate, molding temperature, elastic tensile deformation coefficient, etc., but also considers the cooling water circuit, the speed of mold opening and closing, etc. A reasonable mold structure can effectively extend the life of the mold and ensure the smooth production of the mold. Improve efficiency and reduce costs.
3. Mold processing
The arrangement of the mould process is particularly important. A reasonable process arrangement can speed up the production cycle, shorten the processing time, and effectively save costs. And more importantly, accurate and reasonable processing can ensure the stability of the mold in the production process and prolong the life.
Some processing errors will cause mold welding, no matter how good the welding is, it is a loss to the mold; in addition, poor processing may also affect the mold operation, reduce the mold life, and cause the mold to crack during the production process. It even breaks.
4. Standard parts
Although standard parts are not directly involved in forming, they control the operation of the entire mold. Good standard parts should be wear-resistant, hard enough, high precision, and not suitable for deformation. The price difference of standard parts of different brands is very big, so don't just bargain the price when making molds. Your molds will be reduced from Mercedes-Benz to the masses.
5.Bump model
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