In the ultrafine dispersion process of paste like materials such as paint, ink, pigments, etc., the three roll grinder always occupies an irreplaceable position with its strong shear force and controllable fineness. Its basic working principle is to generate huge shear stress through three horizontally arranged rollers with different rotational speeds, which are squeezed and rubbed against each other, thereby crushing and dispersing the agglomerated particles in the material to achieve the required fineness and glossiness.
However, traditional three roll machines often face two major technical bottlenecks in long-term continuous operation: first, the rollers generate heat due to material friction and pressure, resulting in thermal expansion deformation, which affects the line pressure between rollers and the uniformity of grinding; Secondly, the roller itself will undergo slight elastic deformation under immense pressure. Both of these factors can cause changes in the preset and uniform roll gap in actual production, resulting in inconsistent grinding fineness of materials and poor batch stability.
Shandong Longxing Chemical Machinery Group has achieved key technological breakthroughs in the SM series three roll grinder to address these core issues
1. Material upgrade: All rollers are made of special cold hard alloy cast iron, which has high surface hardness, strong wear resistance, and good internal toughness, ensuring that the roller surface is not easily worn or pulled under long-term high load operation, and the service life is significantly extended.
2. "Mid convex compensation" ingenious design: This is the essence of Longxing's technology. We process the effective working grinding surface of the roller into micro scale, slightly convex arcs on a dedicated high-precision roller grinder. This design is not arbitrary, but a reverse pre compensation through precise calculation. When the equipment generates temperature rise and force deformation during operation, the preset "mid convex" is precisely offset, making the roller tend towards the ideal cylindrical parallel contact in actual working conditions. This innovation realizes the "dynamic constant" of the roller gap, ensuring consistent grinding fineness from start-up to continuous operation for dozens of hours, greatly improving the stability and production efficiency of product quality.
3. Systematic cooling guarantee: The entire series comes standard with an efficient cooling system that can quickly dissipate the working heat of the rollers, suppress thermal expansion from the source, and work together with the "mid convex compensation" design to ensure equipment operation.