Compression molding is the most common manufacturing process.
Mainly completed by the coordination of molds, the shape of the mold determines the shape of the silicone product. Molded silicone products are usually formed by applying pressure through a vulcanizing machine after adding solid silicone raw materials with vulcanizing agents in a high-temperature mold. The high-temperature sulfur is solidified into a solid shape, and the hardness of molded silicone is usually between 30 ℃ and 70 ℃. This manufacturing process is relatively simple and suitable for all silicone products.
The injection process requires high quality and is a combination of liquid silicone and plastic. Its products exhibit good thermal stability, cold resistance, excellent electrical insulation performance, and no toxic substances are produced during combustion. Therefore, it has become an irreplaceable material in the production design of health products, cars, baby products, medical supplies, diving products, kitchen utensils, and seals. Controlled extrusion molding, silicone products are usually formed by extruding silicone using an extrusion machine. Generally, the shape of extruded silicone is elongated, while tubular silicone can be cut freely. The shape of products produced by extrusion technology is relatively single, mostly in the form of strips. Silicone tubes are widely used in the field of mechanical equipment. It can also be used for buffering in packaging materials, where extended silicone rubber is kneaded and mixed with white carbon black, silicone oil, etc. to form a mixed rubber, which is then rolled into sheets.
The film produced by rolling has significant differences in its longitudinal and transverse physical and mechanical properties, which is known as the rolling effect. Specifically, the longitudinal tensile strength of the film is greater than that of the transverse direction, the transverse elongation at break of the film is greater than that of the longitudinal direction, and the longitudinal shrinkage rate of the film is greater than that of the transverse direction. The rolling effect is the directional result of macromolecules and needle like and flake like additives in the rubber material along the rolling direction during the rolling process. The magnitude of the rolling effect is related to the composition of the material, rolling source, speed, speed ratio, etc. Use larger products, such as silicone film and silicone board. The operation method of injection mold or injection mold: Injection mold or injection mold is used for relatively smooth or simple products. There is no mold line, which saves labor and time. It is to surround the product or model you want to copy with a rubber or glass plate, pour the vacuum filled silicone directly onto the product, wait for the silicone to dry and form, take out the product, and the mold will be formed (note: submersible injection mold generally uses brick glue with relatively soft hardness to make the mold, so that demolding is easier and the products inside the silicone mold will not be damaged). It belongs to the combination of solid and liquid, and products such as phone cases, luggage cases, etc. are used for coating. Fast vulcanization, strong adhesion, good fluidity, and easy defoaming. Catalyzed by platinum complexes, non-toxic, and odorless; Excellent thermal stability and cold resistance (can be achieved at temperatures of -100 ℃~350 ℃ with special grades). After molding, it has good breathability, heat resistance, and certain tensile strength; Excellent anti slip performance; Non polluting, low hardness; The adhesive bonding is firm. High tear resistance; High transparency; Good tensile performance. Wear resistant, washable, and high-temperature resistant; High three-dimensional level, the fabric is smooth and soft, with excellent flexibility and elasticity, and is resistant to water and dry cleaning. When applied to cloth, it has anti-aging effect. For example, silicone gloves, fresh rain, etc.
General Purpose Fumed Extrusion Silicone Rubber
