Silicone sealing ring plays a critical role in many industrial and daily life fields, and its sealing effect directly affects the performance and quality of the entire equipment or product. The production process plays a decisive role in shaping its excellent sealing effect.
First of all, the selection of silicone raw materials is the basis. High-quality silicone raw materials have good elasticity, temperature resistance and chemical stability. Before production, the raw materials must be strictly screened to ensure that their purity and various performance indicators meet the requirements. Only high-quality raw materials can provide a good foundation for subsequent process processing, so that the sealing ring can maintain stable sealing performance under different environments.
The mixing link is crucial. Through precise formula design, silicone is evenly mixed with various additives. For example, adding an appropriate amount of vulcanizing agent can control the vulcanization speed and the degree of cross-linking. Proper mixing can make the molecular structure of silicone more uniform, so that the sealing ring can evenly disperse stress when under pressure, effectively prevent local deformation or leakage, and ensure the integrity of the seal.
The molding process is a key step in shaping the shape and dimensional accuracy of the sealing ring. Common molding methods include compression molding, extrusion molding, etc. Compression molding can accurately control the shape and dimensional tolerance of the sealing ring, so that it fits perfectly with the sealing surface. In this process, the precision of the mold, the control of pressure and temperature directly affect the molding quality of the product. Accurate molding can avoid poor sealing due to dimensional deviation.
Vulcanization is the core process of silicone sealing ring production. The vulcanization process causes the silicone molecules to undergo cross-linking reactions to form a three-dimensional network structure, which greatly improves its strength, elasticity and wear resistance. Appropriate vulcanization temperature, time and pressure can ensure that the vulcanization reaction is sufficient and uniform. If the vulcanization is insufficient, the sealing ring may become soft and easy to deform; while excessive vulcanization will cause it to become brittle and lose elasticity, both of which will seriously affect the sealing effect.
Post-processing procedures should not be ignored. For example, the sealing ring after vulcanization is trimmed to remove burrs and defects to make the sealing surface smoother and flatter. The sealing ring that has been post-processed such as grinding can fit better when in contact with the sealing surface, reduce microscopic gaps, and reduce the risk of leakage.
Quality inspection is the last checkpoint to ensure the sealing effect. Qualified products are screened out through strict appearance inspection, size measurement, hardness test, and sealing performance test. Only silicone sealing rings that have undergone comprehensive testing can be put on the market to provide reliable sealing protection for various equipment and products.
In short, the production process of silicone sealing ring is a systematic project. From raw material selection to post-processing testing, each link is closely connected and influences each other, jointly shaping its excellent sealing effect, making it play an indispensable role in many fields.
