How to press silicone products thin?

Silicone products are widely used in daily life, medical treatment, electronics, automobiles and other fields because of their excellent high and low temperature resistance, oxidation resistance, ozone resistance and electrical insulation properties. However, in some specific application scenarios, it is necessary to thin silicone products to meet lightweight, space constraints or specific performance requirements, take you to understand how to thin silicone products.

The process of silica gel products is essentially a process of precise control and processing of silica gel raw materials, and the key is to ensure that the silica gel products after being pressed maintain the original physical and chemical properties at the same time to achieve the required thickness and dimensional accuracy. First, the choice of raw materials is crucial. High-quality silica gel raw materials should have good fluidity and plasticity, so that it is easy to form during the pressing process, while ensuring the strength and durability of the product. Commonly used silica gel raw materials include solid silica gel and liquid silica gel, according to the specific needs of the product to choose the appropriate raw materials.

Mold design is another key link in the thin pressing process. The precision and structure of the mold directly affect the thinning effect and final quality of the silicone products. Mold design should consider the fluidity of silica gel, shrinkage rate and the complexity of the product. In order to ensure the dimensional accuracy and surface quality of the product after pressing, the mold should have high precision and finish, at the same time, reasonable mold structure and flow channel design can effectively reduce the resistance of the silicone in the filling process, improve the uniformity and consistency of the product.

The next step is the implementation of the thinning process. According to the shape and size of the silicone products, different pressing methods can be used, such as die molding, extrusion molding or injection molding. Die molding is suitable for products with complex shape and high precision requirements. By putting silica gel raw materials into the mold, applying a certain pressure and temperature, the silica gel flows in the mold and fills the entire mold cavity, and finally cooling and curing the product after pressing. Extrusion molding is suitable for long or tubular products, by adjusting the screw speed of the extruder and the size of the die outlet, you can control the extrusion speed and thickness of the silicone, to achieve continuous and uniform thinned effect. Injection molding is suitable for the production of large quantities and high-precision products, by injecting silicone raw materials into the mold, using the pressure and temperature control of the injection machine, the silicone is quickly filled and cured in the mold.

In the process of thin pressing, the control of temperature and pressure is very important. Too high temperature will lead to excessive flow of silica gel, affecting the dimensional accuracy and surface quality of products; If the temperature is too low, the silica gel will have insufficient fluidity and it is difficult to completely fill the mold. Similarly, the size of the pressure also directly affects the filling effect of the silicone and the density of the product. Therefore, in the process of pressing, it is necessary to accurately control the temperature and pressure according to the characteristics of the silica gel and the requirements of the product, to ensure that the product can be completely filled with the mold during the pressing process, and can maintain the required physical and chemical properties.

The post-treatment process is also a link that cannot be ignored in the pressing process of silicone products. The thinned silica gel products may need to be trimmed, deburring, cleaning and other treatments to improve the appearance quality and performance of the products. Trimming and deburring can remove excess parts and burrs on the edges of products, making them smoother and neater; Cleaning can remove the oil and impurities on the surface of the product and improve the cleanliness and health performance of the product.

It is worth noting that there may be some challenges in the process of silica gel products, such as the shrinkage rate of silica gel, deformation and cracking of products. These problems need to be solved by optimizing mold design, adjusting process parameters and selecting suitable silica gel raw materials. For example, by reasonably designing the flow path and exhaust system of the mold, the shrinkage and deformation of silica gel in the filling process can be effectively reduced; By adjusting process parameters such as temperature and pressure, the fluidity and curing speed of the silica gel can be optimized to reduce the risk of cracking of the product.