How are silicone gaskets produced?

In modern industry and daily life, silicone gaskets are widely used in many fields such as electronic appliances, food and medical care, machinery manufacturing, etc. due to their excellent performance, such as high temperature resistance, low temperature resistance, aging resistance, and good insulation. So, how are these seemingly ordinary silicone gaskets produced?

The production of silicone gaskets begins with the careful selection of raw materials. High quality silicone rubber material is the key. It needs to have high temperature resistance, corrosion resistance, aging resistance and other characteristics to adapt to different application environments. If used in the field of food contact, it must also be food grade silicone material to ensure safety and reliability.
Mold design and processing can be regarded as the core process of silicone gasket production. A mold is like a "template" for a product, and its design rationality directly determines whether the size accuracy and shape of the silicone gasket meet the standards. Dibo Silicone has a professional mold design team that uses advanced CAD/CAM technology for design. At the same time, during the mold manufacturing process, precision and surface quality are strictly controlled, effectively reducing production errors and scrap rates. And they will arrange the mold placement reasonably according to production needs to improve production efficiency. After the mold is opened, a trial mold will be conducted to carefully measure the product and verify it with the drawings to ensure the accuracy and reliability of the mold.

Production molding vulcanization is a key step in giving silicone gaskets their final form. Common molding processes include compression molding, extrusion bonding, and liquid forming, each with its own applicable scenarios. Compression molding is the most common process, suitable for conventional sealing rings. By manually placing raw materials into molds, hot pressing and heating the materials to shape them, silicone gaskets of any structure such as rectangular, circular, and irregular can be produced; Liquid forming is suitable for complex and precision gaskets. The rubber material is pressed into the hot mold cavity through the injection nozzle of the injection machine for molding. The product material has good texture and good self disassembly, but the mold and material costs are relatively high; Extrusion molding is suitable for the production of large silicone gaskets. The extruded long sealing strip is cut into the required length and bonded into a circle. Although there may be gaps at the joint that affect the sealing effect, the advantage is that the size is not limited.
Quality inspection runs through the entire production process. From strict inspection of raw materials upon arrival at the factory, to inspection during the production process, and to comprehensive testing of finished products, every step must not be neglected. Visually inspect whether the surface of the silicone gasket is flat and smooth, and whether there are defects such as bubbles and cracks; Use professional instruments to measure thickness, length, width, etc. for size inspection to ensure consistency with design requirements; Performance testing evaluates the key performance of silicone gaskets, such as high temperature resistance, aging resistance, and sealing.

After production and testing are completed, the silicone gasket will enter the packaging process.
From raw material preparation to final product, the production of silicone gaskets embodies the crystallization of numerous processes and technologies. Every production process is crucial, as they together ensure the excellent quality of silicone gaskets, enabling them to play an important role in different fields and provide reliable support for people's lives and industrial production.