Injection mold is a tool for producing plastic products; it is also a tool that gives the complete structure and precise dimensions of plastic products. The rapid development of China's injection mold industry, but compared with the advanced level of foreign injection mold industry, there is still a small gap. At present, China's injection mold industry is mainly subject to mold standardization, mold accuracy, life and manufacturing cycle, mold steel product upgrades , the level of enterprise management innovation and other factors. With the continuous development of domestic injection molding technology in recent years, the plastic molding process has been continuously improved, and more and more high-quality injection mold factories have also been established.
Producing a set of high-quality injection molds not only requires good mold processing equipment and skilled mold manufacturing workers, but also a very important factor is to have a good mold design, especially for complex molds, the mold design is good or bad More than 80% of the quality. An excellent mold design is: to meet the requirements of the customer, the processing cost is low, the processing is difficult, and the processing time is short.
To achieve this, we must not only fully digest the requirements of the guests, but also have an understanding of the injection molding machine, mold structure, processing technology and the mold factory's own processing capabilities. Therefore, to improve the design level of injection molds, the following design principles should be followed:
1. At the beginning of the design of each injection molded product, the mold opening direction and parting line should be determined first to ensure that the core sliding block mechanism is eliminated and the influence of the parting line on the appearance is minimized.
2. Understand every detail in each mold design and understand the purpose of each part in the mold.
3. Appropriate draft angle can avoid product top injury, such as top white, top deformation, top breaking.
4. In the design of more reference to the previous similar design, and understand the situation in its mold processing and product production, learn from experience and lessons learned.
5. When designing injection molding products, the contradiction between product appearance, performance and process must be taken into consideration. Sometimes sacrifice some of the craft, can get a good appearance or performance.
6. Learn more about the working process of the injection molding machine to deepen the relationship between the mold and the injection molding machine.
7. The buckle device is designed to be shared by a plurality of deduction positions at the same time, so that the overall device will not be unable to operate due to the damage of individual deduction positions, thereby increasing its service life, and then more filtering and filleting are applied to increase the strength.
8. The next factory understands the processing technology and understands the characteristics and limitations of each processing.
9. The product logo is generally set on the flat surface of the inner surface of the product, and adopts a convex form. A mark may be set at the surface where the normal direction and the mold opening direction may be the same, so that the pull can be avoided.
10. Learn the test results and changes in molds of your own designed molds and learn lessons.
11. Inlay inserts in injection molded products can increase local strength, hardness, dimensional accuracy and provide small threaded holes (shafts) to meet a variety of special needs. At the same time, it will increase product costs.
12. Try to use the mold structure that was previously successful in the design.
13. Setting a reasonable roundness can also improve the machining process of the mold. For example, the cavity can be directly machined with an R-blade to avoid inefficient electrical machining.
14. Learn more about the impact of mold water on products.
15. Struts should not be used as much as possible. They should be connected to the outer wall as much as possible or be used together with stiffeners. The purpose is to strengthen the strength of the struts and make the rubber flow more smoothly.
16. Study some special mold structures to understand the latest mold technology.
The main basis for mold design is the product drawings and templates provided by customers. Designers must carry out careful and detailed analysis and digestion of products and prototypes. At the same time, all projects must be checked one by one during the design process. When starting the mold design, more consideration should be given to considering several options and measuring the advantages and disadvantages of each solution. One is preferred. Because of the reasons for the recognition of time, the designs that were considered reasonable at that time, after the practice of production and use, were also bound to be improved.
