Plastic injection mold processing steps
2024-01-25
Plastic injection molding is a commonly used mold in plastic injection products, and it is also the basis for the complete structure and accurate size of plastic products. plastic Injection molding is a processing method for mass production of plastic products, which specifically refers to the hot melted plastic materials by injection molding machine high pressure shot into the mold cavity, after cooling and curing, to obtain the shaped product. A set of molds from zero to molding, the specific process to go through, which should pay attention to what? Plastic injection mold processing steps 1. Product analysis Before the mold design, the designer should fully analyze and study whether its plastic products meet the principle of injection molding processing, and it is necessary to carefully negotiate with the designer of the product and reach a consensus. It includes the necessary discussion of the geometry, dimensional accuracy and appearance requirements of the product, and tries to avoid unnecessary complexity in mold manufacturing. 
Second, the mold structure design Design is the source of mold making, and the design of a mold is a big factor. Have an understanding of the processing technology and the processing capacity of the mold factory itself. Therefore, to improve the level of mold design, the following points should be done: 1. Understand every detail of each mold design, understand the use of each part in the mold. 2. In the design of more reference to the previous similar design, and understand the situation in its mold processing and product production, learn from the experience and lessons. 3. Learn more about the working process of the injection molding machine to deepen the relationship between the mold and the injection molding machine. 
4. The factory to understand the processing process, understand the characteristics and limitations of each processing. 5. Understand the mold test results and mold change of their own design, learn lessons. 6. In the design as far as possible to use the more successful mold structure. 7. More understanding of the mold into the water on the impact of products. Study some special mold structures and understand the latest mold technology. Third, determine the material of the plastic injection parts. Before choosing the production plastic material, we must first determine the relevant characteristics of the production product, but also combined with the actual capacity of the mold factory processing and heat treatment to give the correct choice. Four, parts processing and mold assembly. In addition to giving the best structure and reasonable tolerance in the design of the precision mold, parts processing and mold assembly is crucial. Therefore, the selection of processing accuracy and processing method occupies an absolutely dominant position in mold manufacturing. The dimensional tolerance of the molded product is mainly composed of the following parts: 
1. The manufacturing tolerance of the mold is about 1/3, and the tolerance caused by mold wear is about 1/6. 2. The tolerance caused by uneven shrinkage of the molded part is about 1/3. 3. The tolerance caused by the inconsistency between the intended contraction and the actual contraction is about 1/6. Total tolerance =(1)+(2)+(3)+(4). Therefore, in order to reduce mold manufacturing tolerances, the processing accuracy should first be improved, and with the use of CNC machine tools, this problem has been well controlled. In addition, in order to prevent the tolerances caused by mold wear and deformation, the mould parts such as the cavity and core should be quenched when the machining accuracy is higher and the product output is larger. In the medium and large mold, in order to save materials and facilitate processing and heat treatment, the mold design should try to use the Mosaic structure. In order to solve the tolerance caused by the uneven contraction of the molded part and the inconsistency between the predetermined contraction and the actual contraction, 1/3 of the product tolerance is generally selected in the mold manufacturing, as the manufacturing tolerance of the mold, the purpose is to leave a larger adjustment room for the later molding process to solve the tolerance caused by the molding process. Five, plastic injection mold test. The mold is designed and processed well, and it can be used depending on the effect of the test mold. The mold test mainly determines the specific effect of the mold production products, and is also an important step to test whether the mold is qualified. Through the test mold we can detect the problems in the mold, which is convenient for designers to modify and deal with in time.
