Six major processes of silicone products

1. Molding
Compression molding is the most common production process. It is mainly completed by the cooperation of the mold, and the shape of the mold determines the shape of the silicone product. Molded silicone products are usually made of high-temperature molds and solid silicone raw materials added with vulcanizing agents to apply pressure through a vulcanizing machine, and high-temperature sulfur is solidified. The hardness of molded silicone is usually 30°C-70°C. The process is relatively simple and suitable for all silicone products.

2. Injection (injection)
This process requires relatively high quality, and is a combination of liquid silicone and plastic.
Its products show good thermal stability, cold resistance, excellent electrical insulation properties, and no toxic substances are produced when burning.
Therefore, it has become an irreplaceable material in the production design of health products, automobiles, baby products, medical products, diving products, kitchen utensils and seals.

3. Extrusion
Extrusion molding, extruded silicone products are usually formed by extruding silica gel through an extrusion machine. Generally, the shape of extruded silica gel is long, and the tubular shape can be cut at will. The shape of the extruded products is relatively simple, mostly strips. Silicone tubes are widely used in the fields of medical and mechanical equipment. It can also be used as a buffer in the packaging material.

4. Calendering
The silicone rubber is kneaded and kneaded by adding silica, silicone oil, etc. to make a mixed rubber, and then the sheet is calendered.
The film produced by calendering has obvious difference in physical and mechanical properties in the longitudinal direction and the transverse direction. This phenomenon is called the calendering effect. The specific performance is that the longitudinal tensile strength of the film is greater than the transverse direction, the transverse elongation at break of the film is greater than the longitudinal direction, and the longitudinal shrinkage rate of the film is greater than the transverse direction.
The calendering effect is the result of the orientation of macromolecules and needle-like and flake-like compounds in the rubber compound along the calendering direction during the calendering process. The size of the calendering effect is related to the composition of the rubber compound, the calendering temperature, the speed, and the speed ratio.
For larger products, such as silicone sheets, silicone plates.

5. Perfusion
The operation method of filling mold or filling mold: filling mold or filling mold is used for relatively smooth or simple products. There is no mold line to save labor and time, that is, the product or model you want to copy is surrounded by plastic or glass plates. Get up, pour the evacuated silica gel directly onto the product, and after the silica gel is dried and formed, take out the product and the mold is formed (Note: The perfusion mold is generally made of silica gel with relatively soft hardness, so that it is easier to demould, and it is not easy to mold. It will damage the products in the silicone mold). It belongs to the combination of solid and liquid, and is used for products such as mobile phone covers, luggage covers, etc.

6. Coating
Fast vulcanization; strong adhesion; good fluidity and easy defoaming. Using platinum complex catalysis, non-toxic, no peculiar smell; excellent thermal stability and cold resistance (use temperature -60 ℃ ~ 200 ℃) after molding, it has good air permeability, heat resistance, and certain tensile strength;
Excellent anti-skid performance; no pollution; low hardness; strong bonding with plant glue. High tear strength; high transparency; good tensile properties. Wear-resistant, washable, high temperature resistance; high three-dimensional level, the fabric is smooth, soft, flexible, with excellent texture and good elasticity. Washable and dry cleaning.
Applied to the cloth, it has anti-aging effect. Such as silicone gloves, rain boots, etc.


About the silicone plate, please check the details:
https://www.siliconefoam.net/product-extra-soft-cellular-silicone-iota-bf-1000-.html