Hot melting labeling machine capable of preventing label warping

Abstract

A hot melting labeling machine capable of preventing label warping comprises a pinch roll, a tension roll, a cutting rotary roll, a container conveying disc, a glue spreading roll, a fixed cutting mechanism, a telescopic cutting mechanism, a first sensor, a second sensor and a third sensor, the telescopic cutting mechanism is arranged on the cutting rotary roll, and the fixed cutting mechanism is arranged on the side of the cutting rotary roll. When the cutting rotating roller rotates until the inner cutter and the outer cutter are aligned, the inner cutter acts to cut off the label belt, then a label to be pasted is attached to the surface of the cutting rotating roller under the action of negative pressure, the label is pasted on a container after being coated with glue of the glue coating roller, and in the process, the label belt is cut into single labels, and then the single labels are pasted on the container. And the end part of the label cannot be wrinkled or twisted, so that the label adhered to the container cannot be warped.

Description

Technical Field

[0001] This utility model relates to the field of container labeling machine technology, and in particular to a hot melt labeling machine for preventing label peeling. Background Technology

[0002] Labels containing product information are typically affixed to the outer surface of various containers and packaging materials. There are several methods for applying these labels, including hot melt adhesive labeling and self-adhesive labeling. Hot melt adhesive labeling is suitable for rapid labeling on production lines, offering advantages such as simple processing, low cost, strong adhesion, and low requirements for storage environments. Therefore, hot melt adhesive labeling is commonly used for items such as milk cartons and drinking water bottles.

[0003] Chinese invention patent CN202180037723.7, entitled "Container Labeling Machine," discloses a hot melt adhesive labeling machine. The patent describes a method where "a cutting roller 9 can be used to transport the cut label 6 to a transport roller 25, which is adapted to allow the label 6 received from the cutting roller 9 to successively contact the corresponding container 4 transported by the conveying device 3." It further states that "an adhesive application roller 24 adjacent to the transport roller 25 applies adhesive to both ends of the label 6." However, in actual production, labeling machines using this technology frequently experience label lifting, meaning the edges of the label on the container lift or become misaligned. Once this happens, additional adhesive is needed for re-adhesion, and in severe cases, the label may even need to be torn off and returned to the production line for re-labeling, significantly impacting production progress. The root cause is that in existing labeling machines, the cut ends of the label cannot adhere well to the transport roller. When in contact with the adhesive application roller, wrinkles form, preventing the adhesive from fully covering the label ends.

[0004] To address the shortcomings of existing labeling machines, we have developed an improved hot melt labeling machine that prevents label peeling. Utility Model Content

[0005] The purpose of this invention is to provide a hot melt labeling machine that prevents label peeling, in order to solve the problem of label peeling during the container labeling process.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A hot melt labeling machine for preventing label peeling includes a clamping roller, a tension roller, a cutting roller, a container conveyor, a glue applicator, a fixed cutting mechanism, a telescopic cutting mechanism, a first sensor, a second sensor, and a third sensor. The clamping roller, tension roller, cutting roller, container conveyor, glue applicator, fixed cutting mechanism, telescopic cutting mechanism, first sensor, second sensor, and third sensor are all mounted on a base frame. The clamping roller is driven by a motor and clamps the label tape for forward conveying. The tension roller tensions the label tape. The cutting roller rotates around a central axis and laterally... The surface has regularly arranged air holes, which can be used to adsorb the label tape onto the surface under negative pressure. A telescopic cutting mechanism is provided on the cutting roller, which includes a telescopic cylinder and an inner cutter. The telescopic cylinder drives the inner cutter to extend and retract. There are protrusions on the roller surface of the cutting roller. A fixed cutting mechanism is provided on the side of the cutting roller, in which an outer cutter is fixedly installed on a knife holder. The container conveyor tray carries multiple containers, which can rotate on the container conveyor tray. The container conveyor tray can rotate to bring the containers one by one closer to and press them against the roller surface of the cutting roller.

[0008] In the aforementioned hot melt labeling machine for preventing label peeling, the inner cutting blade is located in a groove-shaped cavity opened at the protrusion.

[0009] The aforementioned hot melt labeling machine for preventing label peeling has a left bevel, a cutting edge, and a right bevel on its inner cutting blade.

[0010] In the aforementioned hot melt labeling machine for preventing label peeling, the telescopic cutting mechanism and the protrusions are evenly distributed along the circumference on the cutting roller, and the number of both is the same. The circumferential distance between two adjacent telescopic cutting mechanisms is the same as the length of the label affixed to the container.

[0011] This utility model has the following advantages:

[0012] This utility model of a hot melt labeling machine for preventing label peeling features a telescopic cutting mechanism on the cutting roller and a fixed cutting mechanism on the side of the cutting roller. When the cutting roller rotates to the point where the inner and outer cutting blades are aligned, the inner cutting blade moves to cut the label tape. Then, the label to be pasted is attached to the surface of the cutting roller under negative pressure. After being coated with glue by the glue-applying roller, the label is pasted onto the container. During the process, after the label tape is cut into individual labels, the ends of the labels will not wrinkle or twist, thus ensuring that the labels pasted on the container will not peel off. Attached Figure Description

[0013] Figure 1 This is a top view schematic diagram of the present invention;

[0014] Figure 2 for Figure 1 Enlarged view of a portion of point A in the middle;

[0015] The labels in the diagram represent: 1. Label tape, 2. Pinch roller, 3. Tension roller, 4. Cutting roller, 5. Container conveyor, 6. Container, 7. Glue roller, 8. Fixed cutting mechanism, 9. Telescopic cutting mechanism, 10. First sensor, 11. Second sensor, 12. Third sensor, 4-1. Protrusion, 8-1. Outer cutter, 9-1. Telescopic cylinder, 9-2. Inner cutter, 9-2-1. Left bevel, 9-2-2. Cutting edge, 9-2-3. Right bevel. Detailed Implementation

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0017] This utility model relates to a hot melt labeling machine for preventing label peeling, such as... Figure 1 As shown, the system includes a clamping roller 2, a tensioning roller 3, a cutting roller 4, a container conveying tray 5, a glue-applying roller 7, a fixed cutting mechanism 8, a telescopic cutting mechanism 9, a first sensor 10, a second sensor 11, and a third sensor 12. All components are mounted on a base frame. The clamping roller 2 is driven by a motor to deliver the label tape 1, which is then tensioned by the tensioning roller 3. The cutting roller 4 has fine air holes on its surface; the negative pressure from these holes draws the label tape in. A telescopic cutting mechanism 9 is located on the cutting roller 4, and a fixed cutting mechanism 8 is located on its side. The container conveying tray 5 is driven by a motor to rotate, and containers 6 are rotatably placed on it.

[0018] This utility model discloses a hot melt labeling machine for preventing label peeling. The fixed cutting mechanism 8 includes an outer cutter 8-1, which is fixedly installed on the base. The telescopic cutting mechanism 9 includes a telescopic cylinder 9-1 and an inner cutter 9-2. The telescopic cylinder 9-1 drives the inner cutter 9-2 to extend and retract. The outer cutter 8-1 and the inner cutter 9-2 cooperate to cut the label tape 1 into individual labels for use.

[0019] This utility model discloses a hot melt labeling machine for preventing label peeling. It has multiple protrusions 4-1 on the cutting roller 4 that protrude from the roller surface, which are used to apply glue when the roller surface comes into contact with the glue coating roller 7.

[0020] This utility model discloses a hot melt labeling machine for preventing label peeling. The inner cutting blade 9-2 is located at the protrusion 4-1. The inner cutting blade 9-2 is provided with a left bevel 9-2-1, a cutting edge 9-2-2, and a right bevel 9-2-3. The slope of the right bevel 9-2-3 needs to be greater than the slope of the left bevel 9-2-1.

[0021] The working principle of this utility model for a hot melt labeling machine to prevent label peeling is as follows:

[0022] The label tape 1 is delivered by the clamping roller 2, tensioned by the tensioning roller 3, and then adsorbed onto the cutting roller 4. As the cutting roller 4 rotates, the label tape 1 is cut at a set position by the cooperation of the outer cutter 8-1 and the inner cutter 9-2's cutting edge 9-2-2. After being cut, the inner cutter 9-2 retracts, and at this time, the tail end of the cut label and the head end of the next label are adsorbed onto the protrusion 4-1. As the cutting roller 4 rotates, the part of the label located on the protrusion 4-1 is coated with glue on the glue application roller 7. Finally, the label is pasted onto the container 6.

[0023] like Figure 2 As shown, before cutting, the inner cutter 9-2 extends. At this time, the label tape 1 is slightly lifted by the extended cutter, higher than the roller surface. When the cutting roller 4 rotates to the position of the outer cutter 8-1, the two cutters work together to cut the label tape. After the label tape is cut, under the action of negative pressure, the tail end of the previous label and the head end of the next label fall back to the roller surface. During the fall, the tail end of the previous label falls back to the roller surface along with the left inclined plane 9-2-1, and the head end of the next label falls back to the roller surface along with the right inclined plane 9-2-3. The speed at which the tail end of the previous label falls back to the roller surface is slightly slower than the speed at which the head end of the next label falls back to the roller surface. When the inner cutter 9-2 retracts completely, the tail end of the previous label and the head end of the next label slightly overlap, meaning the tail end slightly touches the head end. This allows the glue to be applied completely to both the tail end of the previous label and the head end of the next label simultaneously during subsequent glue application. On the other hand, the left bevel 9-2-1 and right bevel 9-2-3 ensure that the tail end and head end of the cut label fall back smoothly along the bevels, preventing them from falling back too quickly due to the vacuum effect. This prevents wrinkles from forming on the label during rapid descent and effectively prevents the head and tail ends of the label from lifting up, thus eliminating label lifting.

[0024] The first sensor 10 identifies the black mark located at the connection point between the front and rear labels on two adjacent complete labels, determines the length of the label, and feeds the signal back to the control system, which automatically adjusts the speed of the pinch roller 2 to ensure the conveying rate of the label belt 1, and coordinates with the speed of the cutting roller 4 to ensure the dynamic balance of the entire system speed.

[0025] The second sensor 11 is used to identify the black mark on the label. The signal is transmitted to the controller, which drives the inner cutter 9-2 on the cutting roller 4 to extend outward.

[0026] The third sensor 12 is used to identify the black mark on the label. After identification, the signal is transmitted to the controller to control the inner cutter 9-2 to retract, so as to avoid the inner cutter from colliding and interfering with the glue coating roller 7.

Claims

1. A hot melt labeling machine for preventing label peeling, characterized in that: The system includes a clamping roller (2), a tensioning roller (3), a cutting roller (4), a container conveyor (5), a glue-applying roller (7), a fixed cutting mechanism (8), a telescopic cutting mechanism (9), a first sensor (10), a second sensor (11), and a third sensor (12). All components are mounted on a base frame. The clamping roller (2) is driven by a motor and clamps the label tape (1) forward. The tensioning roller (3) tensions the label tape. The cutting roller (4) rotates around its central axis and has openings on its side surface. The regularly arranged air holes can be used to adsorb the label tape onto the surface under negative pressure. A telescopic cutting mechanism (9) is provided on the cutting roller (4). The telescopic cutting mechanism (9) includes a telescopic cylinder (9-1) and an inner cutter (9-2). The telescopic cylinder (9-1) drives the inner cutter (9-2) to extend and retract. A protrusion (4-1) is provided on the roller surface of the cutting roller (4). A fixed cutting mechanism (8) is provided on the side of the cutting roller (4). In the fixed cutting mechanism (8), the outer cutter (8-1) is fixedly installed on the knife holder. Multiple containers (6) are carried on the container conveying plate (5). The containers (6) can rotate on the container conveying plate (5). The container conveying plate (5) can rotate to bring the containers (6) one by one closer to and close to the roller surface of the cutting roller (4).

2. The hot melt labeling machine for preventing label peeling according to claim 1, characterized in that: The internal cutting blade (9-2) is located in the groove-shaped cavity opened at the protrusion (4-1).

3. The hot melt labeling machine for preventing label peeling according to claim 1, characterized in that: The internal cutting blade (9-2) is provided with a left bevel (9-2-1), a cutting edge (9-2-2), and a right bevel (9-2-3).

4. A hot melt labeling machine for preventing label peeling according to claim 2, characterized in that: The telescopic cutting mechanism (9) and the protrusion (4-1) are both evenly distributed along the circumference on the cutting roller (4), and the number of them is the same. The circumferential distance between two adjacent telescopic cutting mechanisms (9) is the same as the length of the label affixed to the container (6).

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