1. Calendering is suitable for the production of simple […]
1. Calendering is suitable for the production of simple sheet and plate products. It is the method of pressing the rubber compound into a film with a certain shape and a certain size through a calender, which is called calendering. Some rubber products such as tires, rubber cloth, hoses and other textile fiber materials are coated with a thin layer of glue. Gluing on the fiber is also called glue or rubbing glue. The glue gluing process is generally completed on the calender. The purpose of drying and dipping the fiber material before calendering is to reduce the moisture content of the fiber material to prevent water transpiration and bubbling, and to increase the temperature of the fiber material to ensure the quality of the calendering process. Glue dipping is a necessary process before gluing. The intention is to improve the combination of fiber materials and rubber.
2. Extrusion molding It is used for more messy rubber products such as tire treads, hoses, and metal wire surface coatings that require extrusion molding. It is a way to put the rubber compound with a certain degree of plasticity into the hopper of the kneading machine, and pass through various mouth shapes, also called prototypes, under the kneading of the screw. Before extruding, the rubber material is preheated to make the rubber material soft and easy to extrude, and then there are rubber products with lubricating appearance and precise dimensions.
3. Compression molding It is also possible to use molding methods to produce some messy-shaped rubber products such as cups and sealing rings. The rubber material is placed in the mold and heated to form with the help of the male and female molds.
Sponge foam sealing strip manufacturers have excellent weather resistance, ozone resistance, heat resistance, acid and alkali resistance, water vapor resistance, color stability, electrical function, oil filling and room temperature fluidity. Ethylene-propylene rubber products can be used for a long time or intermittently at 120°C. Participating in suitable antioxidants can increase its operating temperature. EPDM rubber cross-linked with peroxide can be used under severe conditions. EPDM rubber can reach more than 150h without cracking under the conditions of ozone concentration 50pphm and 30% stretching.
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