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Since the performance of edge-sealing hot melt adhesive is affected by temperature, temperature is a very important indicator in the process of edge-sealing. The temperature of the hot melt adhesive, the substrate temperature, the temperature of the edge banding material and the temperature of the working environment (the workshop where the semi-automatic edge banding machine is located) during edge banding are all very important edge banding parameters. In the semi-automatic edge banding machine, since the adhesive is coated on the substrate, the substrate with too low temperature will cause the hot melt adhesive to be cured in advance, so that the adhesive can stick to the substrate, but it cannot stick to the edge banding material. Keep above 20°C.
The working environment temperature of the semi-automatic edge banding machine will affect the curing speed of the glue. The factory often has edge sealing problems in the season with low temperature, the reason is that the curing speed of hot melt adhesive is accelerated at low temperature, and the effective time of bonding is shortened. If the feed rate of the semi-automatic edge banding machine cannot be changed (in most cases), it is necessary to preheat the sheet and the edge band material to ensure the quality of the edge band.
The glue line between the board and the edge band after edge sealing will adversely affect the appearance of the panel furniture. Excessive amount of glue will make the glue line obvious, and conversely, it will reduce the edge sealing strength. There are many reasons for the discontinuous or uneven glue line phenomenon.
The following factors should be comprehensively considered: the cutting accuracy of the sheet, the edge of the sheet must be kept at a 90° angle with its plane; whether the pressure of the edge banding machine press roller is evenly distributed and the size is appropriate, and the pressure direction should be 90 degrees from the edge of the sheet. ° angle; whether the glue roller is in good condition, whether the hot melt glue is evenly applied on it, and whether the amount of glue applied is appropriate;