Guide: The edge Bending process plays a very important role in wood based panels furniture. It can not only ensure the beauty of the furniture, but also effectively prevent the furniture from getting damp.
Furniture edge banding is an important process in the production of furniture. It refers to the use of adhesives to stick edge banding strips to the edges or corners of furniture wood based panels s, which mainly plays a role in beautifying, preventing furniture from being affected with moisture and preventing harmful gases from volatilizing. It is mainly divided into wooden edge banding and PVP edge banding. The wooden edge banding is suitable for pasting the edge contour of solid wood furniture, and PVP edge banding is mainly used in furniture, kitchenware, doors and windows, etc. As the saying goes, details determine success or failure, and edge Bending technology is a detail that determines the success or failure of furniture quality. 1 The development of edge banding technology has three main purposes to improve the edge banding quality. First, effectively protect products from or less affected by processing environment and use environment, and have strong impact resistance during handling, assembly and normal use; Second, improve the overall visual beauty of the product; The third is to improve the use function of the product and make the product more ergonomic. The quality of edge Bending directly affects the quality and environmental protection performance of wood based panels furniture. So far, the biggest problems encountered in the edge bonding process are related to the use of hot melt adhesive, which takes a long time to heat, increasing energy consumption and reducing the edge bonding efficiency; The work piece and edge Bending device are often polluted, which increases the cleaning workload; Special heating and storage devices for hot melt adhesive are required. In addition, from the perspective of product quality, the biggest disadvantage is that there is edge Bending gap between the edge banding belt and the board. With the use and the invasion of moisture stains, the edge Bending gap becomes more and more obvious, and gradually affects the bonding performance. Therefore, exploring new edge banding technology has become a technical difficulty in the industry. In 2009, Homag introduced a new type of laser edge banding technology (Laser Tec), pushing the edge banding technology into a new era. The laser edge bonding technology does not need to clean the equipment and replace the adhesive, and can replace the edge bonding strips of different colors at any time according to the customer’s needs, so as to achieve a truly seamless and efficient edge bonding. 2 Principle of laser edge banding The edge banding tape used for laser edge banding is coated with a layer of special polymer, which is used to replace hot melt adhesive. The polymer will melt when irradiated by laser, and this polymer in the molten state has excellent bonding performance. The laser source used for laser edge banding is light-emitting diode. After the millivolt ray emitted by the diode is enhanced by the polarization principle, it is gathered by the concentrator to form a single laser beam with concentrated energy. The laser window is adjusted according to the thickness of the plate to make the high-energy laser beam converge on the edge banding band with appropriate width. The pre coated polymer functional layer of the edge banding belt absorbs laser energy and melts rapidly. Under the effect of the edge banding roller pressure, the molten polymer penetrates the surface of the plate to form a high adhesion, which makes the plate and the edge banding belt have excellent bonding strength. At the same time, an appropriate amount of polymer fills the gaps between the plate and the edge banding belt, and between the edge banding belt, so as to achieve seamless and sound edge banding quality. 3 Laser edge banding The material of laser edge banding is the same as that of traditional edge banding, including the copolymer of acrylonitrile, butadiene and styrene (ABS), polypropylene (PP), polyvinyl chloride (PVC) and polymethyl methacrylate (PMMA). Laser edge banding takes the place of traditional hot melt adhesive with special polymer functional layer, and integrates the edge banding substrate and functional layer. Simi Kitchen Cabinet Co., Ltd. uses laser edge banding from REHAU, Germany. The base material is ABS, and the functional layer is PP, which is more environmentally friendly than traditional PVC edge banding. 4 To sum up, the laser edge bonding process is similar to the traditional edge bonding process, but the laser edge bonding process is simplified due to the integrated production of edge bonding tape and adhesive layer. The high-performance laser edge banding equipment is equipped with a scanning storage device, which can scan and store the process parameter information of the edge banding belt. When replacing the edge banding belt, there is no need to manually debug the parameters to eliminate human error. Laser edge bonding reduces unstable factors, reduces labor and energy consumption costs, is more automatic, and product quality is more stable. 5 Quality advantage of laser edge bonding technology Laser edge bonding reduces a series of processes such as heating, gluing and cleaning, which greatly reduces the impact of uncertain factors on product quality. The energy value of the main parameters of laser edge bonding is mainly determined by the model parameters of the edge bonding belt. It is easier to control stably in production, so it has better performance in the peeling strength, product appearance and use performance of the wood based panels edge bonding. Through graphite test, water vapor test and high temperature resistance test, it can be seen that the edge Bending quality of laser edge Bending products is superior to that of traditional edge Bending products. 6. In the use of water vapor test wood based panels furniture, water vapor in the air is undoubtedly the biggest threat to remove stains. The laser edge bonding technology has greatly improved the moisture-proof property of the edge bonding plates. The edge bonding parts of the laser edge bonding plates have not changed after 30 min water vapor test for the edge bonding plates of the three processes. The picture shows that the water vapor resistance of laser edge banding plate is obviously better than that of traditional edge banding plate. The quality of furniture edge Bending not only affects the appearance beauty of furniture, but also affects the service life of furniture. Laser edge bonding technology is an advanced edge bonding technology developed in recent years. It can make wood based panels furniture have a more beautiful appearance, improve product quality, and most importantly, greatly simplify the operation process and processing costs. Compared with traditional edge banding technology, laser edge banding has no glue volatilization pollution and low machine energy consumption, which is an energy-saving and environmental protection technology
