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Automatic Labeling Machine

1. What is an automatic labeling machine

An automatic labeling machine is a device that can attach rolls of paper or metal foil labels to prescribed packaging containers or products. The back of the brand is self-contained with adhesive and is regularly arranged on the smooth backing paper. The peeling mechanism on the labeling machine can automatically peel it off. Labeling can complete various operations such as plane pasting, single-sided or multi-sided pasting of packaging, cylindrical pasting, partial or full-covering cylindrical pasting, and concave and corner pasting.

2. Introduction of automatic labeling machine

Many automatic labeling machines have different functions, but the basic principles are similar. The automatic labeling machine is a device that sticks paper or metal foil labels on the specified packaging containers with adhesives.
It can complete various operations such as flat sticking, single- or multi-sided packaging, cylindrical sticking, partial or full-covering cylindrical sticking, concave and corner sticking, and other operations.

3. Functional characteristics of automatic labeling machine

(1). Wide range of application: it can realize not only the side (plane) single labeling/corner touching label of square bottle/flat bottle (whole bottle state), but also recognize the single/double labeling function of circumferential positioning of round bottle
(2). The unique material distribution mechanism ensures reliable and practical material distribution when used online with the production line
(3). The unique corner labeling mechanism ensures that the corner labels on the three sides of the square bottle are flat and wrinkle-free
(4). It can be used both as a stand-alone machine and in conjunction with the production line

4. The labeling process of automatic labeling machine

When the sensor signals that the labeling object is ready to be labeled, the drive wheel on the labeling machine rotates. The roll label is tightened on the device. The front end is forced off and ready to be labeled when the backing paper is run against the peel-off plate, changing direction. This is due to the stiffness of the label material itself. At this time, the labeling object is just at the lower part of the label, and under the action of the labeling wheel, the synchronous labeling is realized. After labeling, the sensor under the roll label sends a signal to stop running, the drive wheel is stationary, and a labeling cycle ends.

No matter what type of labeling machine it is, the labeling process is generally similar. The differences are: the installation position of the labeling device is different, the conveying method and positioning method of the labeling object is other, and the form of the labeling roller is different.
Generally, automatic labeling machines have requirements for labels:

(1) Surface material

The stiffness of the label is the key to the label, so the surface material is required to have a specific strength and hardness. Label stiffness and material thickness and label area, so soft film material increase viscosity. Generally control at 100μm or more. Thin paper materials, such as 60~70g/m2 labeling paper, are usually not suitable for large labels but are ideal for processing into small labels, such as price labels used on price tag guns. The poor firmness of the label will cause the label not to be labeled during labeling, or the label will be rewound with the backing paper, making the automatic labeling invalid.

(2) Release force

Also known as peel force, the force with which the label is released from the liner. The release force is related to the type and thickness of the adhesive, the silicone coating on the surface of the backing paper, and the ambient temperature during labeling. If the release force is too small, the label will easily fall off during the conveying process (separate from the backing paper). We should control the technical indexes comprehensively to keep the clamping force within a reasonable range.

(3) Bottom paper

It is also an important indicator to control automatic labeling. The base paper surface is evenly coated with silicon, and the release force is consistent. The thickness of the backing paper should be uniform while having good tensile strength to ensure that it will not break when labeling. It should also have a sound light transmission to ensure that the sensor correctly identifies the label's location.

(4) Processing quality

It is required that both sides of the backing paper after slitting are flat and free of cracks to avoid the backing paper from breaking when the tension changes. When die-cutting, it is necessary to avoid cutting through the backing paper or destroying the silicon-coated layer. Suppose the backing paper and the silicon-coated layer are damaged. In that case, the backing paper is easily broken, or the adhesive in the label penetrates the backing paper, causing no labeling and tearing of the backing paper. In addition, the static electricity in the roll paper label should be eliminated before labeling because static electricity will cause the label not to be labeled or the label to be inaccurate.

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  • Feb 6 2022
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