The edge banding process is a very tedious process. A little carelessness can lead to small defects in the product. Therefore, for many edge banding manufacturers, mastering the edge banding process is to master the high quality of the edge banding.U-shaped decorative stripThe edge sealing process is no exception, and it may become more and more complicated. The quality of the decorative strip is mainly due to process problems. If the process is not good, the product will be scrapped and the loss will be great. ForU-shaped decorative stripThe main influencing factors are as follows:

  1.U-shaped decorative stripEquipment: Due to the mismatch between the engine of the edge banding machine and the crawler, the crawler is unstable and wavy in operation, which generates stress between the edge banding strip and the end face of the plate, and the sealing edge is not straight, which is not conducive to equipment trimming (the trimming scissors inside the equipment itself); The rubber roller and the belt feed roller are poorly matched, and the phenomenon of glue shortage or uneven coating is common. Trimming and chamfering tools are usually not adjusted properly, not only requires additional trimming manually, but also the quality of trimming is difficult to guarantee. In short, due to the low level of equipment commissioning, repair and maintenance, the quality problems caused are common and persistent.

  2.U-shaped decorative stripMaterial: The thickness deviation of wood-based panels generally does not meet the standard, most of them are positive tolerances, and often exceed the allowable tolerance range (the allowable tolerance range is 0.1~0.2).; The flatness is not up to standard. This makes it difficult to grasp the distance between the pressure roller and the rail surface (the thickness of the base material). If the distance is too small, it is easy to overpressure, increase stress and cause cracking; if the distance is too large, the board cannot be pressed tightly, and the edge cannot be guaranteed. It is firmly bonded with the board end.

  3.U-shaped decorative stripMachining accuracy: In the machining process, the machining error mainly comes from cutting and precision cutting. Due to the systematic error of the equipment and the machining error of the workers, the end face of the workpiece cannot be leveled and cannot be kept perpendicular to the adjacent surface. Therefore, the edge band cannot fully contact the end face of the plate during edge sealing, and there will be a gap or exposed substrate after edge sealing., Affects appearance. In addition, the substrate will crack during processing, and it is difficult to hide it by sealing the edge.

  4.U-shaped decorative stripEdge sealing material: Most edge sealing materials are PVC, which is greatly affected by the environment. It hardens in winter, and its affinity for glue decreases. Coupled with longer storage time and surface aging, the adhesion strength to the glue is low. For the paper-based edge banding with a small thickness, because the toughness is large and the thickness is too small (for example, 0.3mm thick), the cut of the edge banding is uneven, the bonding strength is insufficient, and the trimming effect is poor. The rework rate is high. High, the waste of edge sealing is also very serious.

  5.U-shaped decorative stripAdhesive: Special edge sealing hot melt adhesive is used for edge sealing. Due to the low temperature in winter, in order to ensure the glue and strength, the temperature of the glue should be slightly higher. If the temperature is too high, more than 190 ℃, the glue will become too thin and the glue layer will become thinner. When it is applied to the end face of the plate, the temperature will drop, andU-shaped decorative stripThe temperature will also be lower, resulting in a significant reduction in edge seal strength. If the temperature drops to 170°C, the glue will become thicker, but the temperature of the edge band will decrease, and the glue and strength will be insufficient. No matter how low the temperature is, the glue will not melt well. In production, this contradiction is very prominent and difficult to solve. In addition, the adhesive quality of the glue itself and the compatibility and affinity with the base material and the edge banding strip will affect the edge banding quality.