1. The structural characteristics and quality problems of the original edge glue
The shape of edge glue is similar to ellipse, the thickest 15mm, the widest 35mm.
(1) Since the middle core layer of the belt core is on a flat surface, the adhesive force between the edge glue and the belt core is small, and the edge glue is easy to fall off-leading to delamination.
(2) Because the width of the uppermost layer and the lowermost layer of side glue is too large (20mm), it is easy to bring the side exposed cloth-resulting in delamination.
(3) Since the upper and lower top layers have a curvature in contact with the edge glue, it is easy to form an empty edge, leading to cracks in the edge glue and delamination.
(4) Due to the single specification of the side rubber, it is necessary to stretch the conveyor belts of different thicknesses, which is not only labor-intensive, but also unstable in quality, which may easily lead to uneven width of the strip. It is easy to bring the side exposed cloth and edge sponge to cause delamination.
In summary, the type of edge glue is single, and the unreasonable edge glue structure is the main reason for delamination.
2. Improve the structure and characteristics of the rear side glue
The shape of the edge glue remains the same, the bottom edge of the core with the second layer is staggered by 10 mm, the remaining layers are staggered by 2 to 3 mm, to the upper edge of the middle layer, the upper part of the core layer is staggered by 2 to 3 mm, and the top edge glue is 10 mm , The new edge glue has a ladder structure.
(1) Due to the adjustment of the width of the bottom layer and the top layer of the belt core, the width of the crimping glue is changed from 20 mm to 10 mm, which fundamentally solves the problem of cloth exposed on the belt side.
(2) Due to the stepped structure, the contact area between the edge glue and the belt core is increased, which greatly increases the adhesion between the belt core and the edge glue, so that the edge glue is firmly fixed in the belt core, and basically solves the problem of the edge glue is not wear-resistant and easy to fall .
(3) Due to the adoption of the new edge glue process, there is no gap between the edge glue and the belt core, which prevents edge glue cracks and sponges.
(4) After repeated trials, we have newly developed two types of side rubber, which changed the past due to the single type of side rubber that caused unstable quality, which not only reduces rubber consumption but also improves the quality of the conveyor belt.
