What are the processes of silicone products?
Silicone rubber products have started to be used in more and more fields. It is precisely because of its non-toxic, tasteless and high temperature resistant characteristics that determine its application field. Different silicone rubber products have different manufacturing processes.
Here are six processes of silicone rubber products:
Moulding:
The molding process is the most common. It is mainly completed by mold coordination, and the mold shape determines the shape of silicone products. Molded silicone rubber products are usually formed by applying pressure through the vulcanizing machine table after the solid silicone rubber raw material with vulcanizing agent is put into the high-temperature mold, and the high-temperature sulfur is solidified. The hardness of the molded silicone rubber is usually 30 ° C-70 ° C. This production process is relatively simple, and is applicable to all silicone rubber products.
Ejection (injection):
This process requires high quality. It is a combination of liquid silicone rubber and plastic. Its products are characterized by good thermal stability, cold resistance, excellent electrical insulation, and no toxic substances during combustion. Therefore, it has become an irreplaceable material in the production and design of health products, automobiles, baby products, medical supplies, diving supplies, kitchen appliances and seals.
squeeze:
Extrusion molding. Extruded silicone rubber products are usually extruded by an extrusion machine. Generally, the extruded silicone rubber is long in shape, and the tubular silicone rubber can be cut at will. The shape of the products produced by the extrusion process is relatively simple, mostly strip. Silicone tube is widely used in medical and mechanical equipment fields. It can also be used for caching in packaging materials.
Calendering:
Silicone rubber is kneaded and mixed with white carbon black, silicone oil, etc. to make rubber mixture, and then rolled out of sheets. The physical and mechanical properties of the films made by calendering are obviously different between the longitudinal and transverse directions, which is called calendering effect. Specifically, the longitudinal tensile strength of the film is greater than the transverse tensile strength, the transverse tensile elongation of the film is greater than the longitudinal tensile strength, and the longitudinal shrinkage of the film is greater than the transverse tensile strength. Calendering effect is the result of orientation of macromolecules in rubber compound and needle like and sheet like additives along the calendering direction during the calendering process. The calendering effect is related to the composition of rubber compound, calendering temperature, speed, speed ratio, etc. For larger products, such as silicon film and silicon plate.
Filling:
Operation method of filling mold or pouring mold, The mold is formed (note: the injection mold is generally made of silica gel with soft hardness, which is easy to demould and will not damage the products in the silicone rubber mold). It belongs to the combination of solid and liquid, and uses products such as mobile phone cases, luggage cases, etc.
Coating:
Rapid vulcanization; Strong adhesion; Good fluidity, easy to de bubble. Catalyzed by platinum complex, non-toxic and odor free; Excellent thermal stability and cold resistance (use temperature: - 60 ℃~200 ℃). After forming, it has good air permeability, heat resistance and certain tensile strength; Excellent anti-skid performance; No pollution; Low hardness; Glue planting shall be firmly bonded. High tear strength; High transparency; Good tensile properties. Wear resistance, washing resistance, high temperature resistance; It has a high three-dimensional level, and the fabric is smooth, soft, flexible and has excellent texture, good elasticity, and is resistant to water and dry cleaning. When applied to cloth, it has anti-aging effect. Such as silicone gloves, rain shoes, etc.
For silicone rubber, please check the details:
https://www.siliconerubbers.net/product-common-grade-htv-silicone-rubber.html 
