One of the important points in the mold design of liquid silica gel products is the exhaust problem. Because the liquid silica gel material has good fluidity, if the exhaust of the mold design is not done well, the product is easy to be trapped. 

The common method to solve the gas trap of liquid silica gel products is to add a vacuum device to the mold to solve the gas trap problem. 

However, the vacuum device increases the forming time of the product and affects the production cost, and on the other hand, the vacuum effect is not aimed at the product to achieve the ideal state. 

Therefore, in order to solve the gas problem of the product, the first thing is to study the product structure and design the glue point of the mold reasonably. The design of the glue point determines the flow direction of the glue and the path of gas discharge.