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What factors affect the quality of injection molds

Update:18-08-2021
Summary:

With the rapid development of my country’s economy, the […]

With the rapid development of my country’s economy, the application of injection molds in various industries has become more and more mature. Many plastic parts of products need to use injection molds, and the quality and service life of injection molds affect the production costs of enterprises. Therefore, it is very important to improve the quality and maintenance of injection molds to improve the service life of injection molds. So what factors will affect the quality of injection molds?
Injection molds will affect the final quality of injection molds in terms of raw materials, design, processing technology, etc. The specific manifestations are as follows:
1. Mould steel
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 as long as it is more expensive; considering the cost factor of the mold, the mold steel should be selected according to the mold life to prevent unnecessary waste; the life of the general P20 material is about 300,000; 2738 There is no problem if the data is 500,000, H13/2344 is usually more than 800,000-1 million, which can be selected according to the situation;
③Appearance treatment
The appearance of the mold is also very important. Nitriding can enhance the surface hardness of the steel and effectively extend the life of the mold; electroplating can usefully modify the mold steel. For some plastic parts that require high brightness and corrosion resistance, electroplating can be used to enhance and improve the function of the steel.
2. Structural design
The mature mold structure not only considers the characteristics of product data, shortening rate, molding temperature, elastic tensile deformation coefficient, etc., but also considers the cooling water circuit and the speed of mold opening and closing. 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
If a worker wants to do his job well, he must first sharpen his tools. The organization of the mold process is particularly important. A reasonable process organization 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 and extended life of the mold during the production process. Some processing errors will cause mold welding, no matter how good the welding is, it is a loss to the mold; other poor processing may also affect the mold operation, reduce the mold life, and cause the mold to appear in the production process. Pull and even break.
4. Standard Parts
The one that determines the capacity of the bucket is the lowest piece of wood. We all understand this truth, but we often fail to notice it when we do it. The same is true for molds. 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. There is a big price difference between the standard parts of different brands, so don't blindly bargain the price when making molds.