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What are the effects of changes in the speed of the automatic gluing line on the gluing effect of pa
source：www.cnkaihui.com | Release time：2026年09月08日1、 Speed too fast
1. Insufficient glue application per unit area
Under the same glue flow rate, the box speed increases, the time for the box to pass through the glue gun becomes shorter, the glue layer becomes thinner, the glue line becomes thinner, and it is easy to have virtual adhesion, local glue shortage, and later cracking and detachment of the finished product.
2. Distortion of adhesive type, resulting in broken adhesive and point like missing adhesive
The glue gun did not have enough time to fully spread the glue on the surface of the box, causing intermittent glue lines and resulting in missed coating defects.
3. The probability of wire drawing and dragging increases
Under high-speed movement, the adhesive wire is easily stretched and stretched, resulting in wire flying and contaminating the printing surface of packaging boxes and equipment countertops.
4. Insufficient opening hours
After the glue is applied, it is immediately pressed together. The time for the glue to soak the paper substrate is too short, and the glue cannot fully penetrate the paper layer, resulting in a decrease in adhesion strength; The problem will be more prominent for laminated boxes and glossy boxes.
5. Mechanical tracking cannot keep up: There is an upper limit to the response of the servo glue gun, which exceeds the line speed of the equipment, causing the glue position to deviate and the glue line to run off track.
2、 Slow speed
1. The unit coating amount is too large, and the problem of glue overflow is prominent
The box stays under the glue gun for a longer time, and the amount of glue accumulates, resulting in glue overflow; The overflow of glue contaminates the appearance of the packaging box, adheres to the equipment guide rails, and causes the box pieces to stick to cardboard.
2. The adhesive layer is too thick and the curing cycle is prolonged
The cold glue and hot melt glue layers are too thick, making it difficult for the glue to dry completely after compression; Hot melt adhesive can also slow down heat dissipation due to thick adhesive layer, delay cooling and shaping, and be prone to misalignment and box running after stacking.
3. Hot melt adhesive is prone to adhesive penetration
The thick adhesive layer penetrates the paper, and there are traces of adhesive penetration and seepage on the back of the packaging box, which affects the appearance.
4. Long opening hours
The glue is exposed to the air for a long time, and the surface will crust prematurely; When pressed, the surface has already formed a film, and the internal adhesive has failed, resulting in false bonding. It looks like it is stuck, but in reality, it is easy to break open the adhesive.
3、 Frequent fluctuations in speed, sometimes fast or slow
1. Devices without traffic synchronization tracking function have fluctuating amounts of glue application, unstable bonding quality of packaging boxes in the same batch, with some lacking glue and some overflowing glue.
2. The timing of the glue gun movement and conveying rhythm is disrupted, the glue position is offset, and the glue line is misaligned.
3. Under hot melt adhesive conditions, speed fluctuations can also cause unstable glue gun dispensing pressure, exacerbating the risk of gun blockage.
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