In the process of industrial production and manufacturing, silica gel is widely used in electronics, medical, food and other fields. Among them, the solid silicone to liquid silicone molding process is an important process, which can achieve accurate molding and efficient production of silicone. This article will introduce the process steps and operation points of solid silicone to liquid silicone molding.
Rubber preparation:First of all, you need to prepare an appropriate amount of solid silica gel and the corresponding solvent. Solid silicone is typically found in the form of pellets or sheets, and choosing the appropriate particle size and shape is critical for molding accuracy and surface quality. The solvent should be selected based on its solubility and volatility to ensure that the solvent can be effectively volatilized during the molding process.
Solid silicone to liquid state:Put the solid silica gel into the stirrer, add the appropriate amount of solvent, and stir well. The time and speed of stirring should be adjusted according to the particle size and shape of the silica gel and the properties of the solvent to ensure that the solvent can penetrate evenly into the inside of the silica gel.
Molding process selection:According to the desired product shape and size, choose the appropriate molding process. Common molding processes include injection molding, extrusion, calendering, etc. Different processes have different requirements for the viscosity and fluidity of the silica gel solution, therefore, when choosing a molding process, the viscosity and fluidity of the silica gel as well as the shape and size of the desired product need to be considered.
Forming Mold Design:According to the shape and size of the product, design a suitable molding mold. The mold should be designed taking into account the fluidity and shrinkage of the silicone to ensure that the final product has a precise size and shape.
Molding Operations:The solid silicone solution is injected into the molding mold, and the corresponding process parameters are adjusted, such as temperature, pressure, etc. During the molding process, it is necessary to pay attention to controlling the fluidity and temperature of the silica gel solution to avoid the occurrence of bubbles, defects and other problems.
Drying & Curing:The molded silicone product needs to go through a drying and curing process. During the drying process, the temperature and time need to be controlled to completely volatilize the solvent. During the curing process, the silica gel undergoes a cross-linking reaction to form a stable silica gel structure.
Subsequent processing:According to the requirements of the product, the necessary subsequent processing is carried out, such as trimming the edges, sanding the surface, etc.
The solid silicone to liquid silicone molding process can achieve precise molding of silica gel by controlling the fluidity and viscosity of the silica gel solution. This process has the advantages of high efficiency and good repeatability, which is of great significance for the large-scale production of silicone products. In practical applications, process parameters need to be adjusted and optimized according to the specific properties of silica gel and product requirements to achieve the best molding effect.