With the more and more extensive application of liquid silicone products, there are more and more applications in various industries such as electronics, seals, automobiles, medical treatment, baby products, diving, kitchen and adult products. According to statistics, 80% of silicone products in the European and American markets have adopted advanced liquid silicone injection molding process, and less than 20% of low-end products adopt solid process, while in the Chinese market, Only 20% adopt liquid injection molding process. From the perspective of application and future development, liquid injection molding process will be applied more and more. In addition to machinery, materials and personnel, the most important thing for liquid silicone rubber products is liquid silicone rubber mold. So, how to do a good job of liquid silicone rubber mold? What are the technical difficulties of liquid silicone rubber mold?

The technical difficulties of liquid silicone rubber mold can be seen from the following points:

1. Liquid silicone rubber is a kind of material with particularly good fluidity. The gap higher than 0.002 will run into the glue. Therefore, the requirement for precision is very high, which requires high-precision processing equipment and high-precision mold testing equipment, which is the most basic requirement.

2. Secondly, the temperature control should be very accurate. In the mold design, the design of heating system and heat transfer channel is very important. Different heating elements should be selected according to different materials and structures, such as heating pipe heating, oil temperature heating or high-pressure steam heating, For the conduction of temperature in different metal media, how to control the temperature difference is a technical difficulty.

3. The design and processing control of flow channel, according to the different requirements of product requirements and efficiency, design different flow channel modes, cold flow channel (open, needle valve), semi cold flow channel, ordinary flow channel and so on.

4. Different options are made for the treatment of exhaust according to the actual situation, such as opening ventilation slots or vacuumizing.

5. With the cooperation of automatic chemical equipment, in order to achieve high efficiency in the production of silicone rubber products, we must consider the problem of demoulding, whether it is air stripping, automatic manipulator clamping, ejection or blowing, which should be specially considered in the design and manufacture of molds.