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        How can an automatic glue dispensing machine avoid congestion?

　　When an automatic glue dispensing machine is used for glue application, it may become clogged, leading to reduced glue volume, decreased dispensing efficiency, or even incorrect mixing ratios, thereby compromising the quality of the glue application. Alternatively, if the glue cannot be dispensed properly, the machine becomes unusable. So, how can we prevent automatic glue dispensing machines from getting clogged?

　　1. Glue dispensing machine The mixing tube is clogged. The cause of this issue could be a brief interruption in the glue dispensing process during which the anti-curing function was not activated, allowing the glue to dry inside the mixing tube. Another possible reason is that employees, after finishing work, forgot to clean the mixing tube, causing the glue remaining inside to completely solidify and resulting in a blockage. Actually, preventing such clogs is quite simple. If employees need to step away for a short period—say, ten, twenty minutes, or half an hour—they should simply activate the anti-curing function on the automatic glue dispenser. And if it’s time to leave work, they should directly turn on the automatic cleaning function to flush out any glue remaining in the mixing tube.

　　2. Glue dispensing machine The pipe is clogged. The cause of this phenomenon could be that the glue contains too much filler, which has settled in the pipe. A better solution to this problem would be to switch to a higher-quality glue. If you don’t want to change the glue, you can place a filter on the funnel and use it to filter the glue as you pour it in.

　　3. Glue dispensing machine If the glue bucket gets clogged, some of the adhesive may dry up inside the bucket if it’s left unused for an extended period. Some customers, due to order schedules, may only replenish the glue once every month or even two to three months. Over time, the adhesive left in the bucket will dry out. Therefore, in response to this situation, estimate the amount of adhesive needed for each use, and after filling the bucket, clean it thoroughly in the automatic glue-filling machine.

　　4. Crystallization blockage: Some adhesive curing agents can absorb moisture and crystallize, leading to blockages—for example, polyurethane adhesives. If you’re using this type of adhesive, it’s better to operate the machinery more frequently. Don’t leave it sitting for too long, as polyurethane adhesives tend to absorb moisture over time. If you use the adhesive regularly, it will stay fresh and reduce the likelihood of crystallization. If your factory conditions are favorable, you can fill the container with nitrogen gas—nitrogen acts as a protective gas and is particularly effective in preventing adhesive crystallization.

　　There are three main methods for cleaning glue from glue dispensing machines:

　　1. Traditional cleaning methods involve using volatile solvents such as dichloromethane and dimethylformamide to clean the head of the mixture. While this method is both thorough and inexpensive, it poses an environmental pollution problem. Given that the selected chemicals are volatile, toxic, and non-recyclable—contrary to today’s green and environmentally friendly trends—their use is increasingly restricted, and they are gradually being phased out of the market.

　　2. This method involves cleaning with high-pressure water. Although it is non-toxic, low-cost, and easy to operate, it commonly suffers from incomplete cleaning in industrial applications. Moreover, high-pressure water cleaning wastes water resources and generates large amounts of industrial wastewater, making it an undesirable cleaning approach.

　　3. Use environmentally friendly, recyclable solvents for cleaning. From a societal perspective, this method is highly recommended—it’s environmentally friendly, recyclable, and delivers excellent cleaning performance. However, as businesses, they often find it difficult to adopt this approach due to high costs, the need for specialized equipment, and the requirement for independent systems. Currently, there is still no cleaning method that is both environmentally friendly and cost-effective. Therefore, specialized cleaning companies should step up their R&D efforts, actively embrace innovation, and strive to develop affordable, eco-friendly cleaning products as soon as possible, thereby promoting the advancement of the glue-applying machine industry.