What are the forming methods of rubber products?
Calendering is the process in which material is subjected to elongation. The main equipment for rolling forming is three roller or four roller calender. The three roller calender is achieved by rotating the pressure of the two roller. When the rubber material passes through the roller gap, the rubber strip is expanded into a certain sectional shape under the action of pressure, or the process of gluing is realized on the fabric. It is used for sizing, pressing, spinning, gluing and gluing of textile and steel cord, as well as the laminating of film and film, film and adhesive fabric.The basic procedure of calendering process includes: mixing and preheating glue; fabric guiding and drying (and sometimes dipping); rubber sheeting in four roll and three roll calender on or in textile and rubberized calendering semi-finished products cooling, crimping, cutting and placing etc..In rolling before the need to preprocess the rubber and textile, rubber calender before entering, to turn it in the hot refining mill, this process is called thermal refining or preheating, the purpose is to improve the mixing uniformity of refined rubber material, further increase the plasticity, increasing the temperature increase high plasticity. In order to improve the bonding performance of rubber and textile, ensure the rolling quality, need drying of the textile fabric, moisture content control in 1% ~ 2%, the moisture content is too low, the textile hardens, easily damaged during the calendering, high water content, poor adhesion.
In these methods, injection molding has the significant advantages of simplifying process, reducing the number of operators; second, reduce the energy consumption of about 10%; the production efficiency is improved by 4 ~ 7 times; improve product uniformity, stability, size precision and the qualification rate; reduce the flash, saving material and convenient operation;, low labor intensity, high degree of mechanization and automation. Therefore, in recent years, more and more attention has been paid to injection molding technology, and it has been developed rapidly in rubber products production
In rubber products, the main molding technologies are molding, forming, transfer, forming, wrapping, molding and injection molding.
