When dryer fabric guiding problems are encountered, the first step should be to examine the seam. The seam usually could provide a key to the underlying causes of guiding problems.

         

Close attention should be given to front-to-back misalignment. If one edge of the seam is running ahead of the other edge, then there is a high likelihood of misalignment somewhere in the section. Before any other changes are attempted, the section should be realigned and front-to-back seam misalignment should be minimized. In this case, the lateral displacement of the dryer fabric is cyclical with the running length and this problem is commonly called “oscillation”. A symmetrical seam bow, with the edges roughly even and the middle leading, is evidence of other problems which do not affect guiding. If there are oscillations and the seam remains straight, the origin of the problem may be “too early tightened felt” after mounting. If the lateral displacement is not cyclical but happens during a time much longer than one revolution of the dryer fabric, then there must be a guiding problem. 

Guiding of polyester mesh is dependent on friction between the guide roll and the fabric. Anything that increases the coefficient of friction between fabric and roll will improve the guiding action of the roll.

Increasing the diameter of the roll, or covering it with rubber or fiberglass, will increase the friction coefficient and guiding effectiveness. However, these solutions require capital outlays and downtime, which may make them impractical. 

Anna
Sales Department
Hebei Defeng Polyester Fiber Co., Ltd
Add: Jingjiu Railway west, wugong town, Raoyang County
TEL: 86-311-67699480
FAX: 86-311-67699480
Website: www.china-polyestermesh.com. 
E-mail:anna@china-polyestermesh.com

Tag: dryer fabric, polyester mesh