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Types of rubber vulcanization methods

by:ORK      2022-11-05
Types of rubber vulcanization methods There are many kinds of rubber products, and there are many vulcanization methods, which can be classified according to the type of equipment used, the type of heating medium, and the vulcanization process method. (1) Vulcanization room temperature method Vulcanization is carried out at normal temperature and pressure. Application: 1. Adhesive; 2. Room temperature vulcanization glue (2) Cold vulcanization method It is mostly used for the dipping vulcanization of film products. The products vulcanized by this method have poor aging performance and are rarely used at present. (3) Hot vulcanization method 1. Direct vulcanization method (1) Hot water vulcanization method (2) Direct steam vulcanization method (3) Hot air vulcanization method 2. Indirect vulcanization method 3. Pressurized vulcanization method (1) Press vulcanization method Method (2) Tank vulcanization method (3) Individual vulcanizer vulcanization method (4) Continuous vulcanization method 1. Drum vulcanizer vulcanization method 2. Hot air continuous vulcanization is a normal pressure vulcanization method, mainly used for vulcanization Raincloths and latex products. Features: The product is continuously heated and vulcanized through the vulcanization chamber. The vulcanization chamber is divided into three sections, the first section is preheating and heating, the second section is constant temperature vulcanization, and the third section is cooling. The vulcanization chamber can be heated by indirect steam or electric heating. 3. Pipeline vulcanization method 4. Liquid medium continuous vulcanization method 5. Infrared vulcanization method Infrared vulcanization is heated by an infrared radiation vulcanization box, so that the product is heated by radiation between the infrared heating sources. Infrared vulcanization is suitable for thin-walled products such as latex products, rain cloth, and sealing strips. 6. Fluidized bed sulfidation method The structural principle of the fluidized bed is similar to that of a liquid vulcanization tank, and a suspension system composed of solids and gases is stored in the bed. The advantages of fluidized bed vulcanization: high heat transfer capacity; uniform heating; higher temperature limit and chemical inertness than liquid media; safe operation; no contamination of finished products and simplified cleaning procedures. In addition to being used for vulcanized rubber products, the fluidized bed can also be used for preheating of metals, fabrics, blanks, models, and drying of raw materials. Ebullated bed vulcanization is widely used in the continuous vulcanization of coreless products, such as sponge strips, door and window strips, rubber seals ropes, rubber strips and special-shaped extruded products, wires, cables, pure rubber tubes, film products, etc. 7. Microwave preheating hot air vulcanization method Microwave preheating hot air vulcanization method is that the extruded products are first preheated by microwave, and then enter the hot air pipeline for vulcanization. Microwave usually refers to electromagnetic waves with a frequency between 300~30000MHz. It only takes 30~40s to raise the temperature of the rubber seals compound from 90°C to 190°C. Features: The microwave preheating hot air vulcanization method can be used for the vulcanization of thick products. High frequency microwave vulcanization can also be used for the vulcanization of thick products. It has the advantages of high frequency, small footprint and clean products, and is suitable for products of various sizes and complex cross-sectional configurations. It can be used for continuous vulcanization of tapes, hoses and wires. 8. Continuous vulcanization by electron beam irradiation It is to irradiate semi-finished rubber products with high-speed electron beams emitted by electron beam devices, so as to ionize and activate the rubber materials and generate cross-linking reactions. Advantages: It can be vulcanized rapidly and continuously at room temperature; the degree of cross-linking can be achieved by adjusting the energy of the electron beam, and the operation is simple. Electron beam irradiation vulcanization can be used for a variety of products, such as tires, hoses, wires and waterproofing membranes. The compound can also be lightly pre-vulcanized by electron beam irradiation to ensure its forming stiffness. Company website:
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