How to choose the right hot melt labeling machine
Hot melt labeling machine in the automatic labeling machine industry belongs to the low-end equipment, with its small footprint, flexible use in small and medium-sized enterprises are widely used. The labeling speed of hot melt labeling machine is much higher than that of cold glue labeling machine, and the labeling output, for example, 500ml size bottle is 5000-36000 bottles per hour, and the machine can realize the labeling of any bottle surface with the diameter of 35-115mm. And in terms of bottle specifications, it is not only suitable for round bottles but also for flat and square bottles. There are many kinds of hot melt labeling machines on the market, but everything is the same, the hot melt labeling machine labeling methods are mainly suction labeling method, blowing method and rubbing method three. And these three labeling method also has its own advantages and disadvantages.
First of all, the suction method works when the hot melt labeling machine label paper leaves the conveyor belt, distributed to the vacuum pad, the vacuum pad is connected to the end of a mechanical device. When this mechanical device is extended until the label is in contact with the packaging, it shrinks back, at which point the label is attached to the packaging. The advantage of this method is the high precision, and for the difficult packaging products labeling process; disadvantage is the slow labeling speed, and labeling quality is not good.
Secondly, the blowing method is an improvement on the original basis of the suction method, the difference is that the surface of the vacuum pad remains unchanged, the label is fixed and positioned in a "vacuum grid", "vacuum grid" for a plane with hundreds of small holes, small holes are used to maintain the formation of "air jets". By these "air jets" blowing a compressed air, the pressure is very strong, so that the label on the vacuum grid to move, so that it is attached to the packaged goods. The advantage of this method is the high accuracy and reliability; the disadvantage is the complexity of the process.
Finally, the rub-and-apply method works when the labeling, when the leading edge of the hot melt labeling machine label is partially attached to the packaging, the product immediately take away the label. The advantage of this method is the labeling speed, but because the accuracy of this labeling method depends on the speed of the packaging parts through the hot melt adhesive labeling machine with the label distribution, which leads to if the control, the accuracy will be affected.
Hot melt labeling machine different labeling methods for different work objects, blowing labeling method of high reliability and accuracy but the labeling process is relatively complex, however, rubbing labeling method in the speed is guaranteed, the accuracy of the general. Therefore, in the face of different working environments to choose the appropriate labeling method.
