Factors affecting the use of polyurethane screen

The service life of polyurethane screen is affected, and its screening effect and impact resistance are damaged. Factors affecting the use of polyurethane screen The service life of polyurethane screen is affected, and its screening effect and impact resistance are damaged.

The service life of polyurethane screen is affected, and its screening effect and impact resistance are damaged. Factors affecting the use of polyurethane screen The service life of polyurethane screen is affected, and its screening effect and impact resistance are damaged. After all, polyurethane screen is an indispensable main equipment in beneficiation and classification operations, and the factors affecting its service life must be avoided as far as possible when in use, otherwise the performance of the affected equipment will be reduced.

First, inappropriate choice

1. According to its use, it can be divided into dewatering screen, demediating screen and material classification screen. 2. According to its raw material components can be divided into polyester type or polyether type screen; 3. According to the fixing method of the vibrating screen, it can be divided into buckle type, bolt type and tension type screen. The choice of polyurethane screen should be selected according to the use of the screen, mainly whether the screen is used for classification or dehydration. The screen raw materials selected for wet screening and dry screening are different, and polyether polyurethane screens with water screening should be selected to avoid the phenomenon of reduced life of the screen due to hydrolysis. Polyester type polyurethane screen should be used for dry screening and screening of bulk materials, which has better wear resistance and impact resistance and can effectively improve the life of the screen. But also according to the size of the screen aperture to choose the screen device construction, needle on the large hole (proposed aperture of more than 60mm) screen proposed the use of bolt type fixed structure, because the large aperture of the screen to dispose of the material is relatively large, the impact on the screen surface is large, other construction methods of the screen fixed method is easy to loose, the screen loose and the support beam knock each other, Resulting in shorter screen life.

2. Unreasonable use

After using the correct polyurethane screen, it is also necessary to use reasonable use to ensure that the performance of the polyurethane screen can be played well, and the life can be guaranteed, but many users are easy to ignore this point in the process of using the polyurethane screen. For example, the tensioned screen is easy to be smashed loose by large pieces of material in the process of use, and it is necessary to screw the tight bolt regularly. If the tensioning bolt is loose and not tightened for a long time, it will lead to knocking between the screen and the support bar, affecting the life of the screen. At the same time, there is a feeding port design, it is proposed that the feeding method should not be vertical screen surface, the feeding direction is inclined along the logistics direction, and the feeding height is proposed not to exceed 400mm, to avoid the impact force is too large to break the screen. For complex working environments, the metal skeleton surface should be stopped for sandblasting disposal, used to remove the oil and rust stains on the surface, activate the surface, and expand the bonding area. The steel mold is put into the metal skeleton after the outer release treatment (coated with release agent), the platform is heated to 110℃, and the mold temperature is about 80℃. Polyurethane screen before pouring should do the corresponding mold and skeleton disposal, whether it is the temperature or the oil stain on the surface of the skeleton, should be disposed of accordingly, if the external oil stain disposal is improper, affecting the adhesion of the skeleton and polyurethane, easy to fall, unreasonable temperature control, will lead to the pouring of bubbles or burned out and other conditions, resulting in affecting the life of the polyurethane screen.

These are the factors that affect the life of polyurethane screen, we all know that when the life is affected, the more aspects of the performance of the product are not as good as before. In addition, once the use of polyurethane screen problems, for the use of the project will cause obstacles. After all, polyurethane screen is an indispensable main equipment in beneficiation and classification operations, and the factors affecting its service life must be avoided as far as possible when in use, otherwise the performance of the affected equipment will be reduced.