Plastic mold

1, injection mold structure should be reasonable choice. According to the drawings and technical requirements of plastic parts, research and choose the appropriate molding methods and equipment, combined with the machining capacity of the factory, put forward the injection mold structure scheme, fully solicit the opinions of relevant parties, analysis and discussion, in order to design the injection mold structure is reasonable, reliable quality, easy to operate. If necessary, according to the needs of injection mold design and processing, the requirements for modifying the plastic parts drawings can be put forward, but it can be implemented only with the consent of the user.

2, the size of the injection molding parts should be calculated correctly. Forming parts is a direct factor to determine the shape, size and surface quality of plastic parts, which is very important and needs special attention. When calculating the size of molded parts, the average shrinkage method can be generally used. For plastic parts with high precision and need to control the repair margin, it can be calculated according to the tolerance zone method, for large precision plastic parts, as far as possible to use the analogy method, the shrinkage rate of the measured plastic parts geometry in different directions is calculated to make up for the influence of some factors that are difficult to consider in theory.

3, the design of the injection mold should be easy to manufacture. When designing injection mold, try to make the designed injection mold easy to manufacture and cheap to build. Especially for those more complex forming parts, it is necessary to consider whether to use general machining methods or special processing methods. If a special processing method is used, then how to assemble after processing, similar problems need to be considered and solved in the design of injection mold, and should also take into account the repair of the mold after the test, to leave enough repair margin.

4, the design of injection mold should be high efficiency, safe and reliable. This requirement involves many aspects of injection mold design, such as the gating system needs to be filled, the closed module, the temperature adjustment effect is good, and the stripping mechanism is flexible and reliable.

5, injection mold parts should be wear-resistant and durable. The durability of injection mold parts affects the service life of the entire injection mold, so in the design of such parts not only should be its materials, processing methods, heat treatment and other necessary requirements, such as the pin of the type of push rod is also easy to jam, bend, break, so the fault caused by the fault account for most of the injection mold. To this end, we should also consider how to facilitate the adjustment and replacement, but it is necessary to pay attention to the life of the parts and the injection mold.

6, injection mold structure to adapt to the plastic molding characteristics. When designing injection mold, we should fully understand the molding characteristics of the plastic used and try to meet the requirements, which is also an important measure to obtain high-quality plastic parts.