Analysis of the sticking failure of the hottest al

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Analysis of adhesion failure of aluminum foil cap label

the adhesion phenomenon of aluminum foil cap label in beer is the most common die-cutting quality accident in the decline of production subsidies, the rise of raw material prices and the pressure conduction processing of downstream car enterprises. Aluminum foil cap label itself is a very soft metal material, which does not have a certain stiffness like paper and other cut objects. If it cannot be die cut in strict accordance with the processing requirements, it will be difficult to ensure the die cutting quality of aluminum foil cap label

the factors related to the adhesion of aluminum foil cap label are:

1 Aluminum foil cap label must be added in the printing process to prevent alcohol spontaneous combustion. A coating varnish process can not only increase the gloss, smoothness, wear resistance and flexibility of aluminum foil cap label, but also protect the die-cutting tool in the die-cutting process. In the cutting line without printing ink, it is not only necessary to apply varnish, but also need to apply varnish on both sides if necessary. Moreover, it is necessary to choose a high-quality varnish

2. Whether the cutting edge of the die-cutting tool is sharp, whether there is wear and passivation is also closely related to the adhesion of the cap mark

die cutting tools will produce natural wear after being used for a period of time. Under normal circumstances, you need to use oilstone to polish the edge every 3million ~ 5million times of die cutting; Die cutting more than ten million times requires grinding wheel grinding tool angle and cutting edge. If you have the idea of making do in the touch cutting process, and the tool is blunt and continues to be used, the cut aluminum 4. The temperature and humidity of the laboratory must be controlled within a certain range, and the foil cap standard products will certainly have flanging adhesion. To ensure the quality of die-cutting, it is necessary to keep the cutting edge of die-cutting tools sharp. This is the reason why the so-called sharpening knife does not make mistakes in cutting firewood

3. After a period of use, the worktable of the die-cutting machine will be repeatedly impacted by the die-cutting tool, resulting in too wide cutting grains and too deep knife grooves. Therefore, touching the cut aluminum foil cap will form the phenomenon of peripheral overturning and adhesion. Therefore, the workbench of the die-cutting machine should be replaced in time after being used for a period of time. In order to reduce the production cost, 5mm thick plexiglass plate can be used on the worktable, and 5mm thick rubber plate can be stuck on it. When pasting, double-sided adhesive tape paper can be used, which saves time, labor and money, and is easy to replace

4. The spring used on the die-cutting tool is not strong enough, or its own quality is not qualified. After repeated compression for a period of time, it will lose its strong elasticity, resulting in insufficient pressure around the tool during die-cutting, and the tool pressing plate cannot press the stack of aluminum foil to be cut, resulting in flanging adhesion. Therefore, the strength and anti elasticity of the spring used by the die-cutting tool are the key to ensure the die-cutting quality of the aluminum foil cap mark. I suggest that the internal pressing plate should be added to the cutting tool to press the aluminum foil inside and outside, and the middle floor should be cut. In this way, the inside and outside of the aluminum foil cap label are under pressure during die cutting, and the die cutting quality is easy to control

5. During typesetting, if the die-cutting allowance is left too little in order to save raw materials, in the die-cutting process, because the external pressing plate of the die-cutting tool cannot press the cut aluminum foil, it will cause the surrounding overturning and adhesion, and sometimes the finished product and the leftover material will be connected and cannot be cut through. Therefore, a reasonable margin must be set aside during typesetting. Generally, when the inner pressing plate of the tool is not installed, an allowance of 8 ~ 10mm should be left; If the tool with internal pressure is used, it is generally enough to leave an allowance of mm

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