Paper making rubber roller is a large thick walled rubber roller used in various parts of paper machines. After washing with car wash water each time, it can be washed again with some citric acid to chemically react some calcium impurities on the surface of the rubber roller, forming soluble substances for cleaning. What is its centrifugal casting process like? Here is the editor's summary:
Structurally, paper making rubber rollers are basically the same as ordinary rubber rollers, generally made of aluminum alloy or steel. The installation of solid roller cores and hollow roller cores is different during use. In order to facilitate the adhesion between polyurethane elastomer and roller core, the roller core needs to be cleaned before pouring, usually physically and then chemically.
Physical cleaning can remove rust on the surface of the roller core by sandblasting. Then, chemical cleaning can be carried out. Suitable solvents can be used to wash off oil stains and impurities on the surface of the roller core. After cleaning, apply drying glue and bake at a certain temperature for several tens of minutes for later use.
Before pouring, the mold needs to be preheated. The purpose of preheating the mold is to maintain the mold at an appropriate temperature during the pouring process. On the one hand, a suitable mold temperature can ensure that the viscosity of the rubber material will not increase too quickly due to the low mold temperature after entering the mold cavity for a certain period of time, resulting in poor fluidity and insufficient filling of the mold.
On the other hand, it can ensure that the chemical reaction speed, vulcanization speed, processing cycle and production speed can be accelerated after the rubber is filled in the mold and gel. The preheating temperature of the mold is generally around 100 degrees Celsius. After preheating, the mold is immediately installed on the horizontal support plate of the centrifuge. Start the centrifuge to rotate the mold at a certain speed in the horizontal direction, and then pour a uniform mixture of component A and component B into the mold continuously from the pouring port.
The paper making rubber roller utilizes the centrifugal force generated by the high-speed rotation of the mold, and the material is quickly thrown into the mold cavity. After the mold cavity is filled, turn off the centrifuge, remove the mold at a certain temperature, heat for about 1 hour, open the mold to take out the product, repair and inspect it, and then mature it to produce the required paper roller products.
The large amount of heat generated during the operation of the paper making rubber roller cannot be dissipated in a timely manner, resulting in high internal temperature of the paper making rubber roller; The rubber roller has poor performance and is driven to rotate by the ink roller, causing bouncing friction and compression. I hope the above content is helpful to you.
Editor: Nancy
