Edge banding of panels is an indispensable step in furniture production and a crucial factor determining the quality of furniture. So, what should be paid attention to during the operation of the curved and straight edge banding machine to achieve the best results?
The temperature of the panel should not be too low. Low temperature can affect the bonding of the edge band and the hot melt adhesive. Ensure that the hot melt adhesive is applied to the panel, especially in winter when the glue should be applied slightly thicker.
When using thick edge bands for edge banding, the pressure roller of the edge banding machine should be adjusted to the appropriate position, not overly tight. As the edge band is slightly longer than the workpiece, excessive pressure from the pressure roller on the extended part of the edge band, exerting a force perpendicular to the feed direction, may result in insufficient curing of the hot melt adhesive, leading to weak bonding and potential detachment at the tail end.
The quality of the edge band also affects the edge banding effect of the panel. A good-quality edge band results in a tight edge banding on the product, while poor-quality bands may cause larger gaps at the edge and leave a noticeable black line. During machine trimming, poor-quality bands may result in surface scratches. A thicker edge band should have a slightly concave middle part on its cross-section, producing a tighter edge banding effect and better overall quality.
The moisture content of solid wood edge banding materials should not be too high. They should be stored in a cool, dry environment, with the substrate free of dust, maintaining a moisture content between 8-10%.
Due to the rapid edge banding speed, the adhesive should have excellent dispersibility and penetration into the substrate under low pressure. It should exhibit good initial adhesion and instant bonding under short-term pressure, ensuring a strong bond. Care should be taken to maintain the hot melt adhesive within the normal temperature range during use; prolonged exposure to high temperatures may cause the adhesive to separate, while low temperatures can affect its flowability.
The amount of hot melt adhesive applied should result in a slight extrusion at the edges of the bonded components. Excessive adhesive application may create a black line at the panel's edge, affecting aesthetics, while insufficient adhesive application compromises bonding strength. Therefore, the amount of adhesive applied should be adjusted according to the actual conditions of the panel during gluing.
