What are the factors affecting the service life of polyurethane screen mesh?

The vibrating screen is an essential equipment in mineral processing and grading operations, with many specifications and models. To meet different grading and dewatering purposes, the assembled screen mesh structure, size, mesh size, and distribution are diverse. In recent years, many mining equipment have replaced old metal screens with polyurethane screens, which not only improves their service life but also increases the screening rate. Polyurethane elastomer products have properties such as wear resistance, oil resistance, aging resistance, tear resistance, impact resistance, high elasticity, strong vibration absorption, and large load support capacity. Screens prepared from polyurethane have the characteristics of light weight, high screening efficiency, low pore blockage, wear resistance, impact resistance, and long service life. They have been widely used in vibrating screens in metallurgy, mining, coal and other industries.

Although polyurethane mesh has many advantages, improper selection, use, and preparation can have a significant impact on its lifespan, leading to increased operating costs for vibrating screens. So it is important to understand the factors that affect the service life of polyurethane mesh.

• Different uses and raw materials

We need to determine whether the sieve is used for grading or dehydration. The sieve materials used for wet screening and dry screening are different. For example, polyether polyurethane sieves should be used for screening with water to prevent the shortened lifespan of the sieve due to hydrolysis. Polyester polyurethane screen mesh should be selected for dry screening and screening of large materials, which has good wear resistance and impact resistance, and can effectively improve the service life of the screen mesh.

• Installation structure

The installation structure of the screen should be selected based on the size of the screen aperture. For large hole (recommended aperture of 60mm or more) screens, it is recommended to use a bolt type fixing structure. Due to the large material processed by the large aperture screen, it has a greater impact on the screen surface. Other structural forms of screen fixing are prone to loosening, and when the screen becomes loose, it hits the supporting beam, resulting in a shorter lifespan of the screen.

• Regular maintenance and repair

For example, in the process of using a tensioned screen mesh, it is easy to be loosened by large pieces of material, and it is necessary to regularly tighten the tensioning bolts. If the tensioning bolts are not tightened for a long time, it may cause the screen mesh to hit the support bars, affecting the service life of the screen mesh. At the same time, there is also a design for the feeding port. It is recommended that the feeding method should not be perpendicular to the screen surface, and the feeding direction should be inclined along the logistics direction. The feeding height should not exceed 400mm to prevent excessive impact from damaging the screen mesh.

• Use of composite polyweb screen panel

HUATAO's product range has been expanded to include a mesh support, eliminating the need for regular tensioning of the screen mesh during use. This can better protect the screen surface, ensure that the screen surface and seams do not wear out abnormally, extend the service life of the screen mesh, increase the load-bearing capacity of the screen mesh, make the screen seams more stable during use, and prevent deformation due to heavy loads. The fineness under the screen is also more stable. Increasing the porosity by 10% -15% significantly improves the screening efficiency.

Заключэнне

In summary, exploring the durability of polyurethane mesh can help to better understand its performance characteristics and service life, providing a basis for enterprises to choose suitable polyurethane mesh. At the same time, it also helps companies develop reasonable production and maintenance plans, reduce production costs, and improve production efficiency.

HUATAO Group offers a variety of polyurethane screen plates and is committed to becoming your trusted supplier of high-quality accessories suitable for various screening machines.

Contact us <000000>darr;

Annie Lu

Huatao Group

annie.lu@huataogroup.com

Mobile: 0086 18032422676 ( Whatsapp/Wechat/Viber)

https://wa.me/008618032422676

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