Surface roughness is an important parameter in the spinning process. The roughness Ra value and the surface roughness uniformity directly affect the quality of the yarn. This article focuses on the uneven surface roughness of the rubber roller. The causes of the occurrence and the impact on spinning quality are analyzed and commented.
1 Rubber roller surface roughness The descriptive characteristics of the rubber roller
The rubber roller is a rubber body. Because rubber is an elastic object and there are many flexible molecules on its surface, there is a meridional extrusion during the grinding process. Pressure-induced deformation and adhesive friction forms are the causes of surface geometric irregularities, which are mainly composed of different heights, spacings, and peaks and valleys. Through extrusion and friction, the surface of the rubber roller will definitely produce micro-geometric characteristics, and the surface of the rubber roller will become rough. The degree of clumsiness is determined by using Ra as the arithmetic mean tendency of the contour. It is the arithmetic average method of the absolute value of the contour offset within the sampling length to measure the surface gloss of the rubber roller.
2 Reasons for uneven surface roughness
Glue There are many reasons for the uneven surface roughness of the rubber roller. The surface roughness of the rubber roller is also an important feature of the internal quality of the rubber roller, the grinding process, and the overall quality of the surface treatment process.
The influence of looseness on surface roughness unevenness
The comprehensive looseness of the rubber material, rubber roller cover difference, The influence of grinding process and surface treatment on the uneven surface roughness of the rubber roller was carried out on the influence of the surface roughness and uneven surface roughness of the rubber roller on the yarn quality, and it was pointed out that reducing the surface roughness of the rubber roller Method of uneven roughness.
The size of the surface roughness Rα value of the cot roller and the uniformity of the surface roughness are directly related to the spinning function of the cot roller and have a greater impact on the spinning quality. The rubber roller is an elastic object, which is deformed due to radial extrusion during the grinding process and has adhesive friction. If the uneven surface geometry of the rubber roller is composed of peaks and valleys with different heights and spacing, there must be microscopic geometric features on the surface through extrusion and friction. The surface roughness value of the rubber roller is the arithmetic mean tendency of the contour. It uses the arithmetic mean of the absolute value of the contour offset within the sampling length to reveal the brightness of the rubber roller surface.
Some methods to reduce the uneven roughness of the rubber roller surface
(1) Application Do not dispose of rubber rollers. If the rubber roller is not processed, the overall looseness will be high, which will help improve the surface roughness uniformity of the rubber roller.
(2) Use rubber rollers with small misalignment and no misalignment. The rubber roller cover difference is small and the internal stress is small, which is beneficial to improving the roughness and uniformity of the rubber roller surface.
(3) When plate coating is used to treat the surface of the rubber roller, the operation must be steady. Even plate coating can reduce the uneven roughness of the rubber roller surface.
(4) After grinding and handling the rubber roller, you must get on the car in time. If you do not get on the car, cover it with a cloth to prevent sunlight and ozone erosion from affecting the surface properties of the rubber roller. . </p
