Labeling machine

Abstract

The invention relates to the field of labeling, and provides a labeling machine which comprises a rotating disc, a grabbing assembly, a visual detection assembly, a gluing assembly and a negative pressure generation assembly. The multiple grabbing assemblies are evenly arranged on the rotary disc in the circumferential direction at intervals. The grabbing assembly comprises an adsorption head, a cavity is formed in the adsorption head, a plurality of adsorption holes communicating with the interior of the adsorption head are formed in the side, away from the middle of the rotary disc, of the adsorption head and used for adsorbing labels, and the negative pressure generation assembly communicates with the interior of the adsorption head; the visual detection assembly is used for observing which negative pressure holes are covered by the labels in the multiple adsorption holes; the gluing assembly comprises a glue supply unit and a plurality of glue spraying nozzles, the glue supply unit is connected with the glue spraying nozzles, the glue spraying nozzles are equal to the adsorption holes in number and correspond to the adsorption holes in a one-to-one mode, and the glue supply unit is used for supplying glue to the glue spraying nozzles corresponding to at least part of the negative pressure holes. The problems that the labeling efficiency is low and the cost is high are solved.

Description

Technical Field

[0001] The present application relates to the field of labeling, and in particular to a labeling machine. Background Art

[0002] Labeling machines are widely used in food, medicine, daily chemicals and other industries to stick labels on various packaging materials. At present, conventional labels are mainly divided into self-adhesive labels, which are labels with self-adhesive materials, and ordinary labels without self-adhesive materials.

[0003] The self-adhesive label includes a label and a release paper, and the back of the label has a self-adhesive label. When labeling, the worker installs the label material tape on the labeling machine, and the labeling machine separates the label from the release paper and sticks the label on the product packaging.

[0004] However, this labeling method requires stopping the machine to replace a new label tape after the label tape is used up, which makes it impossible to label continuously, resulting in reduced labeling efficiency; secondly, it also causes a large amount of waste of release paper.

[0005] Ordinary labels without self-adhesive materials need to be coated with glue or other adhesive materials before labeling, so as to bond the labels to the product packaging. However, this labeling method also has the problems of low labeling efficiency and serious glue waste. Summary of the invention

[0006] In order to solve the problems of low labeling efficiency and high cost, the present application provides a labeling machine.

[0007] The labeling machine provided in this application adopts the following technical solution: A labeling machine comprises a turntable, a grabbing component, a visual inspection component, a gluing component and a negative pressure generating component; There are multiple grabbing assemblies, and the multiple grabbing assemblies are evenly spaced and arranged on the rotating disk along the circumferential direction; The grabbing assembly includes an adsorption head, the adsorption head has a cavity inside, the adsorption head has a plurality of adsorption holes connected to the inside of the adsorption head on one side away from the middle of the turntable, the adsorption holes are used to adsorb labels, and the negative pressure generating assembly is connected to the inside of the adsorption head; The visual detection component is used to observe which negative pressure holes among the plurality of adsorption holes are covered by the label; The glue coating assembly includes a glue supply unit and a plurality of glue spray nozzles, the glue supply unit is connected to the glue spray nozzles, the number of the glue spray nozzles is equal to and corresponds one to one with the adsorption holes, and the glue supply unit is used to supply glue to the glue spray nozzles corresponding to at least some of the negative pressure holes.

[0008] By adopting the above technical solution, an efficient and accurate automatic labeling process is achieved, reducing the waste of glue. Specifically, by setting up multiple grabbing components and evenly distributing them along the circumference of the turntable, continuity and stability are ensured; the grabbing components complete the actions of grabbing, gluing and labeling, and multiple grabbing components can work at the same time, simplifying the operation process and improving the labeling efficiency; and, by using the visual detection component to observe which adsorption holes are covered by the label, the corresponding glue nozzle sprays glue, and the glue can be accurately applied to the label, reducing the waste of glue.

[0009] Preferably, the grabbing assembly further includes a first driving member, which is disposed on the turntable and connected to the adsorption head and is used to drive the adsorption head to move along the radial direction of the turntable.

[0010] By adopting the above technical solution, the first driving member is arranged on the turntable and connected to the adsorption head, and is used to drive the adsorption head to move along the radial direction of the turntable, so as to better realize actions such as grabbing labels and labeling.

[0011] Preferably, a flexible layer is provided on a side surface of the adsorption head away from the middle of the turntable, and a through hole corresponding to the adsorption hole is provided on the flexible layer.

[0012] By adopting the above technical solution, the setting of the flexible layer enables the adsorption head to better adapt to the changes of the label surface when grabbing the label, improving the stability and reliability of adsorption. At the same time, the through holes on the flexible layer correspond to the adsorption holes, ensuring the effective transmission of suction, further enhancing the adsorption effect, and reducing the risk of label falling.

[0013] Preferably, the glue supply component is used to supply glue to the glue spray nozzle corresponding to the negative pressure hole completely covered by the label.

[0014] By adopting the above technical solution, the glue supply component only supplies glue to the glue spray nozzles corresponding to the negative pressure holes completely covered by the labels, thereby avoiding spraying glue on the adsorption head.

[0015] Preferably, the side surface of the adsorption head away from the middle of the turntable is an arc-shaped surface convex outward from the middle.

[0016] By adopting the above technical solution, when labeling, the middle part of the label is first in contact with the surface of the workpiece. As the adsorption head gets closer to the workpiece, the flexible layer is squeezed and deformed, so that other parts of the label gradually begin to contact the workpiece, thereby squeezing the glue on the back of the label toward the edge, ensuring that all parts of the label are firmly bonded to prevent warping. In addition, this design can also reduce the residual air between the workpiece and the label, further ensuring that the label is adhered to the workpiece smoothly without bubbles.

[0017] Preferably, the adsorption head comprises a mounting block and an adsorption block.

[0018] The mounting block is connected to the first driving member, the adsorption block is located at a side of the mounting block away from the middle of the turntable, and the adsorption block is detachably connected to the mounting block.

[0019] By adopting the above technical solution, the mounting block is connected to the first driving member, ensuring that the adsorption head can move precisely in the radial direction of the turntable, thereby accurately grabbing and releasing the label. The design of the detachable connection between the adsorption block and the mounting block makes it easy to maintain and replace the adsorption block when it is damaged or needs to be replaced, and adsorption blocks of different structures can be replaced according to the different shapes of the workpiece, thereby improving the reliability of the grabbing assembly.

[0020] Preferably, the negative pressure generating assembly includes a hollow plate, an air pipe, a first valve, a rotating joint and a negative pressure generating member.

[0021] The hollow plate is connected to the rotating disk, and the middle part of the hollow plate has a central hole communicating with the interior thereof, and the central hole is connected to the negative pressure generating member through the rotating joint.

[0022] The number of the air pipes is equal to that of the adsorption heads and they correspond one to one. The adsorption heads are connected to the interior of the hollow plate through the corresponding air pipes, and the first valve is provided on any of the air pipes.

[0023] By adopting the above technical solution, the hollow plate is connected to the turntable, ensuring the stability and reliability of the negative pressure system. The center hole is connected to the negative pressure generating part through a rotating joint, realizing the continuous supply of negative pressure and avoiding the problem of negative pressure interruption caused by the rotation of the turntable. The number of air pipes and adsorption heads is equal and one-to-one corresponding, ensuring that each adsorption head can obtain a stable negative pressure, improving the accuracy and stability of label grabbing. A first valve is set on any air pipe, and the air circuit can be adjusted or closed according to actual needs, so that the adsorption action of each adsorption head can be controlled separately, enhancing the flexibility and controllability of the system.

[0024] Preferably, the glue supply unit comprises a glue supply part, a multi-way pipeline and a second valve, the glue supply part is connected to the plurality of glue spray nozzles via the multi-way pipeline, and each branch of the multi-way pipeline is provided with the second valve.

[0025] By adopting the above technical solution, the glue supplying member can supply glue to the glue spraying head through the multi-way pipeline, and by controlling the opening and closing of the second valve, each glue spraying head can be individually controlled.

[0026] Preferably, the labeling machine further comprises a lifting component, wherein the lifting component is connected to the label and is used to drive the label to rise and fall.

[0027] By adopting the above technical solution, the lifting component can adjust the height of the label, shorten the moving distance of the grabbing component when grabbing the label, thereby improving the working efficiency of the labeling machine. In addition, the lifting component drives the label to rise and fall, so that after the label located above is grabbed, the label located below can rise to the grabbing station, ensuring that the grabbing component can accurately grab the label every time.

[0028] In summary, the present application includes at least one of the following beneficial technical effects: 1. The labeling machine realizes efficient and continuous grabbing and labeling of labels by setting multiple grabbing components evenly distributed along the circumference of the turntable, which significantly improves the labeling speed; 2. The visual inspection component is used to observe which adsorption holes are covered by labels, so that the corresponding glue nozzle can spray glue. The glue can be accurately applied to the label, reducing glue waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural schematic diagram of the labeling machine provided in this application.

[0030] Figure 2 This application provides Figure 1 A magnified schematic diagram of center A.

[0031] Figure 3 It is a schematic diagram of an embodiment of the adsorption head provided in the present application.

[0032] Figure 4 It is a schematic diagram of another embodiment of the adsorption head provided in the present application.

[0033] Description of reference numerals: 1. Turntable; 2. Grabbing assembly; 21. First driving member; 22. Adsorption head; 221. Flexible layer; 222. Mounting block; 223. Adsorption block; 3. Visual inspection components; 4. Glue coating assembly; 41. Glue supply unit; 42. Glue spray nozzle; 5. Negative pressure generating assembly; 51. Hollow plate; 511. Center hole; 6. Lifting assembly; 61. Placement table; 62. Lifting plate; 63. Placement frame; 64. Second driving member; 200, label; 300, workpiece; 400, conveyor line; 500, baffle. DETAILED DESCRIPTION

[0034] The following is combined with Figures 1 to 4 This application is described in further detail.

[0035] like Figure 1 to Figure 2As shown, an embodiment of the present application discloses a labeling machine, including a turntable 1, a grabbing component 2, a visual detection component 3, a gluing component 4 and a negative pressure generating component 5.

[0036] Specifically, there are multiple gripping assemblies 2, and the multiple gripping assemblies 2 are evenly spaced along the circumferential direction on the turntable 1. The turntable 1 can be connected to a motor so that the turntable 1 can rotate with its own central axis as the rotation axis.

[0037] The grabbing assembly 2 includes a first driving member 21 and an adsorption head 22. The first driving member 21 is disposed on the turntable 1, connected to the adsorption head 22, and used to drive the adsorption head 22 to move along the radial direction of the turntable 1.

[0038] The first driving member 21 can be a linear driving member such as an electric push rod or a linear motor. An electric slip ring can be arranged in the middle of the turntable 1, and the first driving member 21 is connected to an external power source through the electric slip ring, so as to realize power supply for the first driving member 21.

[0039] The adsorption head 22 has a cavity inside, and a side of the adsorption head 22 away from the middle of the turntable 1 has an adsorption hole connected to the inside thereof, and the negative pressure generating component 5 is connected to the inside of the adsorption head 22. Negative pressure is generated by the negative pressure generating component 5, so that the adsorption head 22 can grab the label 200 by adsorption. Specifically, the front side of the label 200 is attached to the side of the adsorption head 22 away from the middle of the turntable 1, so that the back side of the label 200 is exposed, which is convenient for subsequent gluing of the back side of the label 200.

[0040] The negative pressure generating assembly 5 comprises a hollow plate 51, an air pipe, a first valve, a rotating joint and a negative pressure generating member.

[0041] The middle part of the hollow plate 51 has a central hole 511 connected to its interior, and the central hole 511 is connected to the negative pressure generating element through a rotating joint; the number of air pipes and adsorption heads 22 is equal and one-to-one corresponding, and the adsorption heads 22 are connected to the interior of the hollow plate 51 through corresponding air pipes.

[0042] Specifically, the negative pressure generating member may include an air pump and a pipe, and the air pump is connected to the rotating joint through the pipe, and the negative pressure is created in the hollow plate 51 by the air pump, so that the adsorption head 22 can adsorb the label 200. Among them, the hollow plate 51 is connected to the turntable 1, so that the hollow plate 51 can rotate with the turntable 1, and the air pipe will not be twisted due to the rotation of the turntable 1. The hollow plate 51 is connected to the negative pressure generating member through the rotating joint, so that the negative pressure generating member can stably provide negative pressure for the rotating hollow plate 51.

[0043] Furthermore, a first valve is provided on any air pipe, so that the adsorption and release of the label 200 by each adsorption head 22 can be controlled individually.

[0044] The visual inspection component 3 can be an industrial camera. After the adsorption head 22 adsorbs the label 200, the visual inspection component 3 monitors which adsorption holes are covered by the label 200, and defines the covered adsorption holes as negative pressure holes. By controlling the opening and closing of the first valve, the negative pressure is stopped for the adsorption holes not covered by the label 200, which saves gas and prevents glue from being sucked into the adsorption holes during the subsequent gluing process.

[0045] The glue coating assembly 4 includes a glue supply unit 41 and a plurality of glue spray nozzles 42. The glue supply unit 41 is connected to the glue spray nozzles 42. The number of the glue spray nozzles 42 is equal to and corresponds one to one with the adsorption holes. The glue supply unit 41 is used to supply glue to the glue spray nozzles 42 corresponding to at least some of the negative pressure holes.

[0046] The glue supply unit 41 includes a glue supply part, a multi-way pipeline and a second valve. The glue supply part can be a glue supply pump. The glue supply part is connected to the plurality of glue spray nozzles 42 through the multi-way pipeline. The second valve is provided on each branch of the multi-way pipeline. By controlling the opening and closing of the second valve, the glue supply part can supply glue to any glue spray nozzle 42.

[0047] Since the styles of labels 200 are various, when the adsorption head 22 adsorbs different labels 200, the adsorption holes covered by the labels 200 may be different, that is, the negative pressure holes may not be exactly the same each time. The negative pressure holes are screened out by the visual detection component 3, so that the opening and closing of the second valve can be controlled according to the screening results, and then the corresponding glue nozzle 42 is controlled to spray glue to avoid spraying glue on the adsorption head 22 and causing contamination.

[0048] Furthermore, the glue supply component is used to supply glue to the glue nozzles 42 corresponding to the negative pressure holes completely covered by the label 200. The reason is that the edge of the label 200 may only cover a portion of one or more negative pressure holes. If the glue nozzles 42 corresponding to the partially covered negative pressure holes spray glue, part of the glue may fall on the adsorption head 22, causing pollution and glue waste, and may even block the adsorption holes. Therefore, by supplying glue only to the glue nozzles 42 corresponding to the negative pressure holes completely covered by the label 200, it can be ensured that the sprayed glue falls on the label 200.

[0049] After the glue coating is completed, the gripping assembly 2 moves to the labeling station and then labels the workpiece 300. Specifically, the workpiece 300 can be transported to the labeling station through the conveyor line 400, and a baffle 500 is provided above the conveyor line 400 for limiting the workpiece 300, thereby preventing the workpiece 300 from moving during labeling.

[0050] In some embodiments, the turntable 1 can flexibly adjust the rotation angle according to the monitoring results of the visual detection component 3. Specifically, the relative position of the label 200 and the adsorption head 22 is determined according to the coverage of the adsorption hole, so as to change the position of the adsorption head 22 and the label 200 by adjusting the rotation angle, thereby better completing the gluing and labeling process.

[0051] In some embodiments, a flexible layer 221 is provided on one side of the adsorption head 22 away from the middle of the turntable 1, and a through hole corresponding to the adsorption hole is provided on the flexible layer 221. The flexible layer 221 can be a rubber layer. The provision of the flexible layer 221 makes the adsorption of the label 200 by the adsorption head 22 more stable. In addition, the flexible layer 221 also has a buffering effect, which can prevent the adsorption head 22 from rigidly contacting the workpiece 300 or other components, causing damage to the components.

[0052] like Figure 1 and Figure 3 As shown, in some embodiments, the side surface of the adsorption head 22 away from the middle of the turntable 1 is an arc-shaped surface with a convex middle portion, so that when labeling, the middle portion of the label 200 first contacts the surface of the workpiece 300. As the adsorption head 22 continues to approach the workpiece 300, the flexible layer 221 deforms, so that other parts of the label 200 gradually contact the workpiece 300. When all parts of the label 200 are bonded to the workpiece 300, the adsorption head 22 releases the label 200.

[0053] The label 200 gradually contacts the workpiece 300 from the middle to the edge, which can avoid bubbles between the label 200 and the workpiece 300. In addition, since the glue supply component is only used to supply glue to the glue nozzle 42 corresponding to the negative pressure hole completely covered by the label 200, the edge of the label 200 may have less glue or even no glue. In this embodiment, the middle of the label 200 contacts the workpiece 300 first, so that the glue in the middle can be squeezed toward the edge, ensuring that the edge of the label 200 can also be tightly bonded to the workpiece 300.

[0054] Further, the adsorption head 22 includes a mounting block 222 and an adsorption block 223. The mounting block 222 is connected to the first driving member 21, and the adsorption block 223 is located on a side of the mounting block 222 away from the middle of the turntable 1, and the adsorption block 223 is detachably connected to the mounting block 222.

[0055] The adsorption block 223 is used to adsorb the label 200, and the adsorption block 223 and the mounting block 222 can be connected by bolts. By setting the adsorption block 223 and the mounting block 222 to be detachably connected, when labeling, the adsorption block 223 matching the shape of the workpiece 300 can be selected, thereby achieving a better labeling effect. For example, Figure 4As shown, when the workpiece 300 is cylindrical and a label is required on the arc surface of the workpiece 300, the side surface of the adsorption block 223 away from the middle of the turntable 1 can be a concave arc surface to facilitate labeling, and by controlling the curvature of the side surface of the adsorption block 223 away from the middle of the turntable 1, the middle of the label 200 can also be in contact with the workpiece 300 first during labeling.

[0056] like Figure 1 to Figure 2 As shown, in some embodiments, the labeling machine further includes a lifting component 6, which is connected to the label 200 and is used to drive the label 200 to rise and fall.

[0057] Specifically, the lifting assembly 6 includes a placement platform 61 , a lifting plate 62 , a placement frame 63 and a second driving member 64 .

[0058] The placement table 61 is provided with an opening. The lifting plate 62 is located at the opening. The second driving member 64 is connected to the lifting plate 62 and can drive the lifting plate 62 to rise and fall. When labeling is required, the lifting plate 62 is raised and lowered so that the lifting plate 62 is flush with the top of the placement table 61, and then the labels 200 are stacked and placed on the lifting plate 62. When the grabbing component 2 grabs the topmost label 200, the lifting plate 62 can drive the remaining labels 200 to rise so that the labels 200 can be grabbed next time. Among them, the second driving member 64 can be a cylinder.

[0059] The placement frame 63 is arranged on the placement table 61, and the label 200 is located inside the placement frame 63, so as to prevent the stacked labels 200 from tipping over. In addition, due to the presence of the visual detection component 3, the glue spraying nozzle 42 can always spray glue accurately on the label 200, so the positioning accuracy requirement between the adsorption head 22 and the label 200 becomes lower, and even if the label 200 moves slightly laterally in the placement frame 63, it still does not affect the gluing process.

[0060] The lifting assembly 6 can be used in conjunction with a sensor so that the grabbing assembly 2 can accurately grab the top label 200 every time. For example, the distance between the top label 200 and the distance sensor can be measured by a distance measuring sensor, and the lifting and lowering of the lifting plate 62 can be controlled according to the distance, so that the top label 200 is always in the grabbing position.

Claims

1. A labeling machine, characterized in that: include: A turntable (1), a grabbing component (2), a visual detection component (3), a gluing component (4) and a negative pressure generating component (5); The number of the grabbing assemblies (2) is multiple, and the multiple grabbing assemblies (2) are evenly spaced and arranged on the rotating disk (1) along the circumferential direction; The gripping assembly (2) comprises an adsorption head (22), the adsorption head (22) having a cavity therein, a side of the adsorption head (22) away from the middle of the rotating disk (1) having a plurality of adsorption holes communicated with the interior thereof, the adsorption holes being used to adsorb labels (200), and the negative pressure generating assembly (5) being communicated with the interior of the adsorption head (22); The visual detection component (3) is used to observe which negative pressure holes among the plurality of adsorption holes are covered by the label (200); The glue coating assembly (4) comprises a glue supply unit (41) and a plurality of glue spray nozzles (42); the glue supply unit (41) is connected to the glue spray nozzles (42); the number of the glue spray nozzles (42) is equal to and corresponds to the adsorption holes in one-to-one manner; the glue supply unit (41) is used to supply glue to the glue spray nozzles (42) corresponding to at least some of the negative pressure holes.

2. The labeling machine according to claim 1, characterized in that: The grabbing assembly (2) further comprises a first driving member (21), wherein the first driving member (21) is disposed on the rotating disk (1), connected to the adsorption head (22), and used to drive the adsorption head (22) to move along the radial direction of the rotating disk (1).

3. The labeling machine according to claim 2, characterized in that: A flexible layer (221) is provided on a side surface of the adsorption head (22) away from the middle of the rotating disk (1), and a through hole corresponding to the adsorption hole is provided on the flexible layer (221).

4. The labeling machine according to claim 3, characterized in that: The glue supply component is used to supply glue to the glue spray nozzle (42) corresponding to the negative pressure hole completely covered by the label (200).

5. The labeling machine according to claim 4, characterized in that: The side surface of the adsorption head (22) away from the middle of the turntable (1) is an arc-shaped surface convex outward from the middle.

6. The labeling machine according to claim 2, characterized in that: The adsorption head (22) comprises a mounting block (222) and an adsorption block (223); The mounting block (222) is connected to the first driving member (21), the adsorption block (223) is located on a side of the mounting block (222) away from the middle of the turntable (1), and the adsorption block (223) is detachably connected to the mounting block (222).

7. The labeling machine according to claim 1, characterized in that: The negative pressure generating assembly (5) comprises a hollow plate (51), an air pipe, a first valve, a rotating joint and a negative pressure generating member; The hollow plate (51) is connected to the rotating disk (1); the middle of the hollow plate (51) has a central hole (511) communicating with the interior thereof; the central hole (511) is connected to the negative pressure generating element via the rotating joint; The number of the air pipes and the adsorption heads (22) is equal and corresponds one to one. The adsorption heads (22) are connected to the interior of the hollow plate (51) via the corresponding air pipes. The first valve is provided on any of the air pipes.

8. The labeling machine according to claim 1, characterized in that: The glue supply unit (41) comprises a glue supply component, a multi-way pipeline and a second valve, the glue supply component is connected to a plurality of glue spray nozzles (42) via the multi-way pipeline, and each branch of the multi-way pipeline is provided with the second valve.

9. The labeling machine according to claim 1, characterized in that: The labeling machine further comprises a lifting component (6), wherein the lifting component (6) is connected to the label (200) and is used to drive the label (200) to rise and fall.

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