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Centrifugal casting process of separation roller
- Categories:Industry news
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- Time of issue:2022-04-14 15:10
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Centrifugal casting process of separation roller
(Summary description)The separation roller is a large thick-walled rubber roller used in various parts of the paper machine. It can be washed with some citric acid after each washing with car wash water, so that some calcium impurities on the surface of the rubber roller will chemically react to form Soluble substances for cleaning.
- Categories:Industry news
- Author:
- Origin:
- Time of issue:2022-04-14 15:10
- Views:
The separation roller is a large thick-walled rubber roller used in various parts of the paper machine. It can be washed with some citric acid after each washing with car wash water, so that some calcium impurities on the surface of the rubber roller will chemically react to form Soluble substances for cleaning. What is its centrifugal casting process like? Here is my compilation:
In structure, separation roller is basically the same as ordinary rubber roller, generally made of aluminum alloy or steel. Solid roll cores and hollow roll cores are installed differently in use. In order to facilitate the bonding between the polyurethane elastomer and the roll core, the roll core needs to be cleaned before casting, usually physical cleaning and then chemical cleaning.
Physical cleaning can remove rust from the surface of the roll core by sandblasting. Then, chemical cleaning can be performed. Oil stains and impurities on the surface of the roll core can be washed off with a suitable solvent. After cleaning, apply drying, glue, and bake for tens of minutes at a certain temperature for use.
Before pouring, the mold needs to be preheated. The purpose of preheating the mold is to keep the mold at the proper temperature during the pouring process. On the one hand, the appropriate mold temperature can ensure that within a certain period of time after entering the mold cavity, the viscosity of the rubber material will not increase too fast due to the low mold temperature, resulting in poor fluidity and insufficient mold filling.
On the other hand, it can ensure that the chemical reaction rate, vulcanization rate, processing cycle and production speed can be accelerated after the rubber fills the mold and gel. The preheating temperature of the mold is generally around 100°C. The preheated mold is immediately installed on the horizontal support plate of the centrifuge. The homogeneous mixture is poured into the mould uniformly and continuously from the sprue.
The separation roller uses 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 full, close the centrifuge, remove the mold at a certain temperature, heat for about 1 hour, open the mold to take out the product, trim and inspect it, and then set it to mature, and the desired separation roller product can be produced.
The large amount of heat generated during the operation of the separation roller cannot be dissipated in time, and the internal temperature of the separation roller is high; the performance of the rubber roller is poor, and it is driven by the ink roller to rotate, causing friction and extrusion. Hope the above is helpful to you.
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