If a thick edge banding is used to seal the edge, the tightness of the press roller of the edge banding machine should be adjusted to the best position. The most common problem is that it is too tight. Because the edge banding belt is slightly longer than the workpiece, when the pressing roller presses the extended part of the edge banding belt, a force perpendicular to the feeding direction is applied to the edge banding belt. At this time, since the glue has not been completely cured, the bonding strength is not high. The tail is easy to loosen and not stick firmly.
The indoor temperature during processing should not be too low, generally should be above 15°C, especially when the edge banding is thick, the flexibility will be insufficient, and the normal operation of the preheating device must be ensured. If there is no preheating device, a hair dryer can also be used for heating, etc. The method softens the edge banding. This method is especially suitable for curved edge banding. There shall be no excessive wind in the processing workshop.
The quality of the edge banding tape affects the edge banding effect. The edge banding of products sealed with good quality edge banding tape is tight, and the edge banding of products sealed with poor quality edge banding tape has a large gap in the edge banding, and there is an obvious black line. When the machine is trimming, the backing is easy to scratch marks on the surface. From the cross-section of the thick edge banding tape, the middle part of the glued surface should be slightly concave than the two sides. The product sealed by this kind of edge banding tape has a tighter edge and good effect.
The moisture content of solid wood edge banding materials should not be too high, and should be stored in a cool and dry room. The base material must be dust-free, and the best moisture content should be 8-10%.
Due to the fast edge banding speed, the adhesive must have good dispersibility and permeability to the substrate under low pressure, and good initial adhesion. It should be glued instantaneously under a short period of pressure, and the bond should be firm. When using, pay attention to ensure that the temperature of the hot melt adhesive is within the normal temperature range. A long time too high temperature will cause the glue to separate; the hot melt adhesive cannot achieve good fluidity at low temperatures, so you must master the supplier’s supply when using it. The data.
The amount of hot melt adhesive applied should be based on the slight extruding of the glue outside the glued part. If it is too large, there will be a black line at the edge of the seal, which will affect the appearance; if it is too small, the bonding strength will be insufficient. In order to check whether the adhesive film is continuous, you can use a transparent hard PVC tape to test; you can also use ordinary edge banding tape to seal the edge, and tear off the edge banding tape for inspection when the glue is not cooled.
For manufacturers who use the edge banding machine without front milling cutter device, the cutting quality of the semi-finished products to be banded also affects the edge banding effect. Generally, in order to prevent the product from bursting, manufacturers use a scoring saw (commonly known as a small saw blade) when cutting. The best effect after cutting should be that the small saw blade can be seen on the section but cannot be felt to the touch. When the small saw blade mark is too deep, the edge can not be sealed firmly, a black line can be seen at the edge of the seal, and even a gap can be seen. It is too shallow and easy to burst.
