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The automatic flap closer is the core equipment of the express packaging line, and the setting of glue spraying parameters directly affects the quality of the sealed box and the cost of glue used. There are too many parameters that are mutually constrained, and if they cannot be adjusted properly, it will either result in missed coating or glue overflow. This list lists the 6 most critical setting parameters, which can be adjusted according to the table to cover 90% of debugging requirements.
| parameter | effect | Recommended scope | Adjustment direction |
|---|---|---|---|
| Spray adhesive temperature | Control the fluidity of the adhesive solution | 160-175℃ | If there is a missed coating, the temperature will rise by 5 ℃ |
| Spray adhesive pressure | Control the amount of adhesive produced | 2-4bar | Glue line detailed rules for pressurization |
| Spray time | Single dispensing time | 30-80ms | If the glue is short, there will be a delay |
| Spray adhesive position | Starting point of adhesive line | 3-5mm from the edge | If the glue overflows, it will move inward |
| delay time | Spray adhesive to compression interval | Match opening hours | Degumming shortens the process |
| Combined pressure | Folding cover compression force | 0.3-0.5MPa | Bounce open and apply pressure |
Sunlifehot melt adhesive pelletsWhen used in conjunction with an automatic folding machine, the recommended temperature for the Quick Fix series is 168 ℃ and the opening time is 2 seconds. It can be matched with high-speed lines of 15 boxes/minute or more.
Q: What is the reason for intermittent glue spraying?
A: Most of them are nozzle blockage or unstable pressure. Clean the nozzle first, and then check if the air source pressure is stable at 2 bar or above.
Q: How to adjust the uneven thickness of the glue line?
A: First check if the glue spraying time is constant, and then check for nozzle wear. The nozzle with severe wear and uneven glue dispensing needs to be replaced.
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When choosing a supplier of EVA hot melt adhesive for books, periodicals and packaging, the key is to see if it can solve the actual problems on your production line. Don’t complicate the problem. Just focus on the following three key points to make a judgment.
Hot melt adhesive is a type of plastic adhesive. Its physical state changes with temperature within a certain temperature range, while its chemical properties remain unchanged. It is non-toxic and odorless, and is an environmentally friendly chemical product. Hot melt adhesive is melted by heating. The molten adhesive turns into a liquid and is then […]
