Reasons for the failure to seal panel furniture

1, equipment
Due to the fact that the engine of the sealing machine does not match well with the track, the track is not stable during operation and is wavy, resulting in gravitational attraction between the sealing bar and the end of the plate, causing the sealing edge to appear uneven. Unfavorable equipment trim edge(equipment itself with trim edge knife); Coating roll and belt roll coordination is not good, lack of glue or uneven coating is very common; The trim tool and the angle tool are often poorly adjusted. Not only does it require manual additional trimming, but it is difficult to ensure the quality of the trimming edge. In summary, the quality of equipment is the most common and sustainable due to the poor level of commissioning, maintenance and maintenance.

2, plate
As a substrate, the thickness deviation is generally not up to the standard, and it is mostly positive tolerance, and often exceeds the tolerance allowed range(tolerance range 0.1 ~ 0.2 mm); The smoothness is not up to standard. This makes it difficult to grasp the distance from the compaction wheel to the surface of the track(thickness of the substrate), and the small distance can easily result in over-compression, increased stress, and open rubber; Too large and not tight spacing plate, the sealing edge bar can not guarantee strong binding with the plate end. Small easy to cause too tight pressure, increased stress, resulting in open glue; Too large and not tight spacing plate, the sealing edge bar can not guarantee strong binding with the plate end.

3, processing accuracy
In the process of processing, the machining error mainly comes from the material opening and cutting. Due to the equipment system error and the worker's processing error, the end surface of the workpiece can not reach the level and can not be maintained perpendicular to the adjacent surface. Therefore, the sealing edge bar can not be fully in contact with the end surface of the plate when sealing the edge. During the processing process, the processing error is mainly From the open material and the cut. After sealing the edge, there is a gap or exposed substrate, which affects beauty. What's more, the base material has collapsed during the processing process, and relying on the sealing edge is difficult to cover.

4, sealing materials
Most of the sealing materials are PVC sealing strips, which are greatly affected by the environment. Harden in winter, the affinity for glue decreases, coupled with a longer storage time and aging surface, the adhesive strength of glue is even lower. For sealing strips with a small thickness, due to their large toughness and too small thickness(such as 0.3 mm thick), resulting in defects such as uneven edge cuts, insufficient adhesive strength, and poor trim effects, the rework rate is high, and the sealing edge is wasted. It is also very serious. The adhesive sealing edge is a special sealing edge hot melt adhesive. Due to the low temperature in winter, in order to ensure the glue and strength, the temperature of the glue is slightly higher. If it is too high, the adhesive is too thin, and the adhesive layer becomes thin, it has cooled down when it is painted on the end surface of the plate, and the temperature of the sealing edge is also low, resulting in a significant decrease in the strength of the sealing edge. If the temperature is reduced, the glue is a bit thick, but the temperature of the seal is lower, and the glue and strength are not enough. The lower the temperature, the glue won't melt very well. In production, this contradiction is very prominent and difficult to solve. In addition, the adhesive quality of the adhesive itself and the adaptability and affinity between the substrate and the seal bar affect the quality of the seal.