What is the processing method of silicone injection molding?
Silicone injection molding is a common silicone rubber processing technique that involves injecting liquid silicone rubber material into a mold using specific equipment, and then curing it into the desired product shape through heating or chemical cross-linking. Here are some key features and steps of this processing method:
High precision: Injection molding can precisely control the size and shape of products.
High degree of automation: It can achieve highly automated production processes, reduce manual operations, and improve efficiency.
High production efficiency: suitable for large-scale production, capable of producing a large number of consistent products in a short period of time.
High material utilization rate: Due to the high controllability of the injection molding process, there is less material waste.
High design flexibility: It is possible to quickly adapt to different product design requirements by changing the mold design.
Stable product performance: The vulcanized silicone rubber has good elasticity, wear resistance, and temperature resistance.
The main steps of silicone injection molding include:
1. Preparation stage:
Clean the mold to ensure there are no residues.
Set the temperature, pressure, and other parameters of the injection molding machine.
2. Filling stage:
Transport liquid silicone rubber from the storage cylinder to the screw of the injection molding machine.
The injection molding machine pushes the screw forward to fill the mold cavity with material.
3. Pressure holding stage:
Maintain a certain pressure after filling to fill the possible shrinkage space and ensure uniform density of the product.
4. Cooling/solidification stage:
Cool the filled mold cavity or add a catalyst for chemical reaction (if using addition reaction liquid silicone rubber) to solidify the silicone gel into its final form
5. Demoulding stage:
After the silicone is completely cured, open the mold to remove the finished product and clean any excess edges or other unnecessary parts
Application fields of silicone injection molding processing
Silicone injection molding processing technology is widely used in various fields, such as medical, electronics, automotive, aviation, etc. In the medical field, silicone products are widely used in medical devices, artificial organs, and other areas due to their good biocompatibility and corrosion resistance. In the field of electronics, silicone products are used for electronic components, cable insulation, and other applications due to their excellent electrical insulation and high temperature resistance. In the fields of automobiles and aviation, silicone products are used for seals, shock absorbers, and other applications due to their oil resistance, high and low temperature resistance, and shock absorption properties.
The development trend of silicone injection molding processing
With the advancement of technology and the increasing demand in the market, silicone injection molding processing technology is also constantly developing and innovating. In the future, silicone injection molding processing will pay more attention to the development of automation, intelligence, and environmental protection. Meanwhile, with the continuous emergence of new materials and technologies, the performance and quality of silicone products will also be further improved.
