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Many people buy high-quality boards, but neglect the edge banding step during the furniture customization process. This step is not only indispensable, but also crucial for furniture manufacturing, such as wardrobes. Its quality can affect not only the lifespan and environmental performance of wardrobes and other furniture, but also the overall texture and aesthetics.
What precautions should be taken during winter edge sealing operations? What solutions are available? Let's take a look at the notes compiled by the editor!
Problem 1: Poor adhesion
In winter, the low temperature absorbs some of the heat from the hot melt adhesive and shortens its open time, causing a film to form on its surface, resulting in false adhesion or poor adhesion. The following countermeasures can be taken during edge sealing:
1. Preheat.
Ambient temperature affects bonding strength, so the boards must be preheated before applying adhesive and edge sealing, especially in winter. Before edge sealing, the boards should be placed in the workshop to ensure their temperature matches the workshop temperature.
2. Increase the temperature.
Based on the original temperature setting, the temperature of the hot melt adhesive tank can be increased by 5-8℃, and the temperature of the applicator wheel can be increased by 8-10℃.
3. Voltage regulation.
If the pressure is low during edge sealing in winter, air gaps can easily form between the hot melt adhesive and the substrate, hindering optimal wetting and mechanical bonding, resulting in false adhesion or poor adhesion. To solve this problem, check the sensitivity of the pressure roller, the accuracy of the display instrument, the stability of the air supply system, and adjust the pressure appropriately.
4. Accelerate.
Increase the sealing speed appropriately and avoid exposing the hot melt adhesive to cold air for too long.
Question 2: Edge chipping and glue detachment
Both hot melt adhesives and edge banding strips are significantly affected by temperature. Lower temperatures increase the likelihood of cold shrinkage, leading to further hardening and the generation of internal stress at the bonding interface. When the grooving tool applies impact force to the bonding interface, this internal stress is released, causing edge chipping or adhesive detachment.
To address this problem, we can start from the following points:
1. The temperature of the sheet metal can be adjusted to above 18℃ during grooving to allow the soft, elastic hot melt adhesive to reduce the impact force of the cutting tool;
2. Change the direction of the blade rotation so that the impact force of the blade is applied to the surface of the edge banding strip;
3. Reduce the grooving speed and sharpen the grooving tools frequently to reduce the impact force on the tools.
Question 3: "Stretching"
In winter, the large temperature difference between indoors and outdoors, coupled with air convection, can cause temperature variations, making "stringing" (when sealing edges with transparent tape) more likely. Additionally, excessively high (or low) temperatures, or applying too much adhesive, can also cause stringing. It is recommended to adjust the temperature according to the ambient temperature and the machine's condition.
Although edge sealing is a small matter, it should not be ignored. That concludes today's explanation of important points. See you next time.