How to improve the quality and efficiency of panel furniture edge banding under intelligent manufacturing!

How to improve the quality and efficiency of panel furniture edge banding under intelligent manufacturing!

The edge banding of panel furniture parts is a processing technology that seals the exposed edge of the panel through a certain form and isolates it from the external environment, so as to protect and decorate the edge. It is a crucial link in the production process of panel furniture products, which directly affects the details and overall quality of the panel. Edge banding can not only improve the decorative effect of furniture products, but also protect the substrate to avoid external damage and environmental impact.

  1. Edge banding of panel furniture parts

Edge banding is an essential process in the production of panel furniture. Its role is to protect the substrate, prevent moisture from entering, seal the release of harmful gases and enhance the stability of the product. At the same time, it can also increase the aesthetic value of furniture and achieve the effect of beautification. The edge banding technology of panel furniture has gradually developed from hot melt adhesive edge banding to laser edge banding and hot air edge banding, which mainly experienced four stages: EVA edge banding, PUR edge banding, laser edge banding and hot air edge banding.

How to improve the quality and efficiency of panel furniture edge banding under intelligent manufacturing!

At present, most edge banding machines use hot melt adhesive. The glue is solid at room temperature. It can be liquid when heated and melted. It hardens rapidly after cooling. It is placed between the plate and the edge banding strip by roller coating or spraying to realize edge banding. The edge banding equipment needs to wait for the hot melt adhesive to melt, which takes a lot of time. The workpiece is easy to be polluted during the edge banding process, and the glue reservoir needs to be replaced. There are obvious joints between the edge banding strip and the plate, which affect the quality of the plate to a certain extent.

How to improve the quality and efficiency of panel furniture edge banding under intelligent manufacturing!

The laser edge banding equipment can instantly melt the polymer colloid coating by emitting laser, which has good bonding performance. The conical re pressing roller compresses the edge banding strip onto the workpiece, and then completes the edge banding through trimming, polishing and other processes. Laser edge banding eliminates the gluing device, can store the edge banding process parameters to achieve rapid call, and has strong adaptability to indoor temperature and air humidity.

How to improve the quality and efficiency of panel furniture edge banding under intelligent manufacturing!

The hot air edge banding machine melts the glue by spraying hot air with high temperature and high pressure. The roller mechanism presses the edge banding strip onto the workpiece, and then completes the edge banding through trimming, polishing and other processes. The raw materials of hot air edge banding technology are easy to obtain, green and environmental protection, low price, and simplify the operation process and process steps. The edge banding strip is not easy to fall off, which improves the edge banding quality of panel furniture.

How to improve the quality and efficiency of panel furniture edge banding under intelligent manufacturing!

The multi-functional CNC machining center is a high-end process of edge banding, which has a wide range of applications. It can carry out accurate edge banding of special-shaped curve panels, and the edge banding quality and efficiency are optimal.

  1. Factors affecting edge banding quality and efficiency

The edge banding quality problems of panel furniture parts are mostly shown in the glue seam and the edge banding strip itself. Factors such as operators, selected substrates, edge banding materials, adhesives, edge banding machines, and operating environment will affect the quality and efficiency of edge banding. As shown in the following figure.

How to improve the quality and efficiency of panel furniture edge banding under intelligent manufacturing!

▲ analysis chart of factors affecting edge banding quality and efficiency

2.1 operators

For traditional manual edge banding and semi-automatic edge banding, the quality of edge banding is closely related to the operation level of operators. Skilled operation and correct control of process parameters can reduce the phenomenon of edge banding strip degumming.

How to improve the quality and efficiency of panel furniture edge banding under intelligent manufacturing!

2.2 base material

The flatness, density, moisture content and internal stress of the substrate will directly affect the effect of trimming and edge banding. If the substrate is placed for about a day after cutting, the quality is the best. The thickness of the substrate will also affect the pressure effect of the edge banding strip. At present, the high-end edge banding equipment has expanded the thickness difference of the substrate, effectively weakening its impact on the quality. After processing and testing, when the plate width of the substrate is less than 100 mm, the edge banding quality is significantly reduced, and edge collapse and chamfering are frequent.

How to improve the quality and efficiency of panel furniture edge banding under intelligent manufacturing!

2.3 edge banding materials

The surface roughness of the glued surface of the edge banding strip affects the edge banding quality. Pvc/abc/ melamine plastic edge banding strip should not be edge banding if its surface is too bright and clean; If the surface is too rough, the edge banding strength will be weakened. If the edge banding strip is stored for a long time, an aging layer will appear on its surface, affecting the bonding performance; When sealing veneer / solid wood strip and other materials, it is also necessary to pay attention to the thickness tolerance of wood materials; The melamine edge banding strip with too thin thickness has low bonding strength, large hardness, easy uneven incision and high rework rate.

How to improve the quality and efficiency of panel furniture edge banding under intelligent manufacturing!

How to improve the quality and efficiency of panel furniture edge banding under intelligent manufacturing!

In contrast, thermoplastic edge banding materials can not only realize the edge banding of forming surface with small radius of curvature, but also be applied to NC machining center; The adhesive speed of thin thermoplastic edge banding material is faster than that of melamine formaldehyde resin, and it is water-resistant and heat-resistant; The three-dimensional edge banding material can paste the printed pattern directly on the board, and the pattern is still applicable when machining the curved surface, and it is easy to polish, so as to ensure the quality of furniture.

How to improve the quality and efficiency of panel furniture edge banding under intelligent manufacturing!

2.4 adhesive (when hot melt adhesive is used for edge sealing)

The performance and quality of hot melt adhesive affect the edge banding effect. Its melt viscosity, softening point, thermal stability and drying time determine the quality gap of the prepared hot melt adhesive. EVA hot melt adhesive has low viscosity and good versatility, which can bond almost all substrates and edge banding materials. Good heat resistance, tight joints, and high final strength of glue joints; Polyolefin hot melt adhesive has good heat resistance, which can reduce the loosening of edge banding during heating.

How to improve the quality and efficiency of panel furniture edge banding under intelligent manufacturing!

Pur glue is a kind of active glue, which has both physical and chemical solidification. Good water resistance, solvent resistance, steam resistance and cold resistance. However, due to its reaction with moisture in the air, attention should be paid to storage. When used in the north, low-temperature hot melt adhesive is generally used in summer and high-temperature hot melt adhesive is used in winter. Too little glue cannot reach the adhesive strength, and too much will cause the edge banding material to float.

How to improve the quality and efficiency of panel furniture edge banding under intelligent manufacturing!

2.5 edge banding equipment

For the cutting tool, if it is not sharp, the bonding strength between the edge banding strip and the plate will be weakened, and the quality of end trimming and trimming will be affected; If the coaxiality of the tool shaft is not high or the applied pressure is insufficient, the unevenness will appear. The early edge banding machine was not equipped with a milling cutter unit, which was prone to edge collapse and tear when processing thick edge banding strips. Now, after the front end of the edge banding machine passes through the additional seam milling machine group, the milling cutter is partially meshed and the axis is angled to avoid the cracking of the plate end.

How to improve the quality and efficiency of panel furniture edge banding under intelligent manufacturing!

How to improve the quality and efficiency of panel furniture edge banding under intelligent manufacturing!

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