Many customers who use
automatic edge banding machines will inevitably encounter the situation of unsatisfactory edge banding. There are various reasons for this. There may be problems with equipment, edge banding, and hot melt adhesive. The following are some of the possible reasons. Reasons for reference.
What factors affect the edge sealing quality of the automatic edge banding machine?
1. The quality of hot melt adhesive
The hot melt adhesive should ensure suitable viscosity under low pressure, can be glued instantly under short-term pressure, and the bond is firm.
In the process of edge sealing, it is also necessary to ensure that the temperature of the hot melt adhesive is within the normal temperature range. If the temperature is too low, the fluidity of the hot melt adhesive will be poor. If the temperature is too high, the adhesive will be too thin, thereby reducing the viscosity of the adhesive.
2. Edgeband quality
The quality of the edge banding will also affect the edge banding effect. The edge banding of good quality is tightly bonded at the edge of the product. The edge banding of poor quality has a significant gap in the edge banding of the product, and the edge banding cannot wholly adhere to the plate. On, the edge sealing effect is not good.
3. Edge band material
The oil-rich edge sealing tape will make it more difficult to seal the edge because the oily substance will reduce the affinity between the sheet and the hot melt adhesive and the viscosity of the hot melt adhesive. The edge sealing tape will easily fall off after a long time.
4. Moisture content of solid wood edge banding
For manufacturers of solid wood edge banding materials, it is necessary to pay attention to the moisture content of the edge banding tape not to be too high, especially in humid places in the south, and the edge banding band should be stored in a cool and dry room.
Generally speaking, the optimum moisture content is between 8-10%. Excessive moisture content will reduce the bond strength of the hot melt adhesive.
5. Ambient temperature
When carrying out the edge banding operation, ensure that the ambient temperature cannot be too low and the temperature is too low, which will lead to the lack of flexibility of the edge band.
Especially for thick edge bands, the temperature is too low, the affinity for glue decreases, and the storage time is long, so the bonding strength of edge bands to glue decreases. Generally speaking, the temperature should be above 15 ℃, and the preheating equipment should also work typically when the automatic edge banding machine is working.
6. Equipment aspects
First of all, the overall equipment quality has to pass the test. Other equipment has been used for a long time, and there will inevitably be some minor problems, so every time you seal the edge, you should try a piece of the board first.
Check whether the glue roller and the belt are well matched (a poor fit may result in uneven glue application or lack of glue), whether the trimming function is normal, whether the trimming knife is worn, and so on.
7. Feeding speed
Currently, the feeding speed of an automatic edge banding machine is mostly between 12-20m/min. Of course, there are also higher speeds.
However, it should be noted that to improve the production efficiency, we cannot blindly seek high speed, and it needs to be adjusted according to the edge sealing strength.