Color box anti-disassembly label attaching device, attaching method and automatic attaching equipment

Abstract

The application discloses a color box anti-disassembly label attaching device, an attaching method and automatic attaching equipment, wherein the attaching device comprises a label suction assembly, a suction control assembly and an attaching driving module. The label suction assembly is provided with a first label suction head corresponding to a label cross edge section and a second label suction head corresponding to a label plane section; the suction control assembly comprises first and second suction control gas circuits which are independent of each other and are connected with the two groups of label suction heads respectively, so that the suction force of the first label suction head is smaller than that of the second label suction head. The attaching driving module is connected with the two groups of label suction heads and can drive the two groups of label suction heads to switch between two attitudes of flatness and misalignment pushing, thereby completing label bending and attaching. In this way, label picking and bending forming are simultaneously completed at a single station, the traditional separate-station labeling and corner folding scheme is abandoned, and multi-process positioning cumulative errors are eliminated; through two independent gas circuits, the generation of wrinkles, bubbles and edge lifting defects during label bending is prevented, and the attaching precision of the color box anti-disassembly label and the appearance consistency of the formed label are effectively improved.

Description

Technical Field

[0001] This invention relates to the field of packaging automation equipment technology, and in particular to a color box tamper-evident label attaching device, attaching method and automatic labeling equipment. Background Technology

[0002] In the field of electronic product packaging, products such as power banks, earphones, and smart devices are typically packaged in color boxes. To prevent the products from being illegally opened or tampered with during distribution and sales, tamper-evident labels are usually affixed to the edges of the color box seal. The label spans two adjacent surfaces of the color box, forming an L-shaped structure. Once opened, the label will be damaged, thus achieving the functions of anti-counterfeiting and anti-tampering.

[0003] The traditional labeling method involves first applying the label to one side of the box using a labeling machine, then bending the label to the adjacent side using an independent folding device, completing the L-shaped label application in steps. However, this step-by-step operation has significant drawbacks: First, directly bending the label after it has been applied to one side makes it extremely prone to wrinkles, bubbles, and curling edges. Furthermore, because the label material is relatively soft, the transition to the folding process exacerbates wrinkling problems. Second, the two steps can easily lead to accumulated positioning errors, causing corner misalignment and insufficient regularity in the L-shaped label structure. Therefore, using the traditional labeling method results in low label application quality. Summary of the Invention

[0004] The purpose of this invention is to overcome at least one deficiency in the prior art and to provide a color box tamper-evident label application device, application method and automatic application equipment that can improve the label application quality.

[0005] The objective of this invention is achieved through the following technical solution: A device for attaching tamper-evident labels to color boxes, comprising: A label adsorption assembly, comprising a first label adsorption head and a second label adsorption head, wherein the first label adsorption head is configured to correspond to the cross-side segment of the label and the second label adsorption head is configured to correspond to the flat segment of the label; An adsorption control assembly includes a first adsorption control gas path and a second adsorption control gas path. The first adsorption control gas path is connected to a first adsorption head, and the second adsorption control gas path is connected to a second adsorption head. The first and second adsorption control gas paths are independent of each other, so that the first and second adsorption heads form differentiated adsorption forces, and the adsorption force of the first adsorption head is less than that of the second adsorption head. The attachment driving module is connected to the first label suction head and the second label suction head respectively. The attachment driving module is used to drive the first label suction head and the second label suction head to switch between a flat posture and a staggered pushing posture, so as to drive the label to complete the bending and attaching operation.

[0006] In one embodiment, both the first adsorption control gas path and the second adsorption control gas path are provided with a negative pressure regulating unit and an on / off control unit.

[0007] In one embodiment, the device further includes a support frame and a rotation drive, the rotation drive being mounted on the support frame, the attachment drive module being connected to the rotation drive, and the rotation drive being used to drive the attachment drive module to rotate so that the label adsorption assembly can perform a rotation operation.

[0008] In one embodiment, the attachment driving module includes an attachment pushing cylinder, a first label-absorbing head fixing block, a second label-absorbing head sliding block, and an elastic label-pressing structure; the first label-absorbing head fixing block is connected to the attachment pushing cylinder, and the first label-absorbing head is mounted on one end of the first label-absorbing head fixing block; a guide rail is provided on the end of the first label-absorbing head fixing block away from the attachment pushing cylinder, the second label-absorbing head sliding block is slidably connected to the guide rail, the second label-absorbing head is disposed at one end of the second label-absorbing head sliding block, and the second label-absorbing head is located on one side of the first label-absorbing head; the elastic label-pressing structure is connected to both the first label-absorbing head fixing block and the second label-absorbing head sliding block.

[0009] In one embodiment, the elastic label structure includes a spring fixing seat, a spring mounting shaft, and a spring. The spring fixing seat is mounted on the first label-absorbing head fixing block, one end of the spring mounting shaft is mounted on the second label-absorbing head sliding block, the other end of the spring mounting shaft slides through the spring fixing seat, and the spring is sleeved on the spring mounting shaft, with the spring located between the spring fixing block and the second label-absorbing head sliding block.

[0010] An automatic labeling device for tamper-evident labels on color boxes includes the aforementioned labeling device, as well as a conveying mechanism, a lifting and positioning device, and a label peeling mechanism. The conveying mechanism is provided with a feeding area, an attaching area and an unloading area in sequence. The lifting and positioning device is located below the attaching area of ​​the conveying mechanism. When the conveying mechanism moves the color box to the attaching area, the lifting and positioning device is used to lift and position the color box on the attaching area. The label peeling mechanism is located on the side of the conveying mechanism corresponding to the attachment area. The label peeling mechanism is used to peel the label off the label roll. The attachment device is used to adsorb the label on the label peeling mechanism and attach it to the color box.

[0011] In one embodiment, the automatic labeling equipment for tamper-evident labels on color boxes further includes a clamping assembly mounted on the conveying mechanism and located on one side of the lifting and positioning device. The clamping assembly is used to clamp and position the color boxes on the labeling area.

[0012] In one embodiment, the lifting and positioning device includes a lifting bracket, a lifting support, a blocking member, and a clamping member. The lifting support is disposed on the lifting bracket. The blocking member and the clamping member are respectively arranged at intervals on both sides of the lifting support along the conveying direction of the conveying mechanism. The lifting support is used to support the color box and lift the color box to a preset affixing position. The conveying mechanism is provided with a labeling edge strip and a positioning pressure block on the affixing area. The labeling edge strip is located on the side of the color box, and the positioning pressure block is installed above the labeling edge strip. After the lifting support lifts the color box on the affixing area, the lifting support, the positioning pressure block, the blocking member, the clamping member, the labeling edge strip, and the clamping assembly respectively position the color box vertically, horizontally, and front-back.

[0013] In one embodiment, the automatic labeling equipment for tamper-evident labels on color boxes further includes a labeling component, which is mounted on the conveying mechanism and is used to compact the tamper-evident labels already affixed to the color boxes.

[0014] A method for attaching tamper-evident labels to color boxes includes the following steps: Adsorption stage: The first and second suction heads are driven to maintain a flush position by the attachment drive module; the adsorption control component makes the adsorption force of the first suction head less than that of the second suction head, and the two suction heads adsorb the peeled tamper-evident label together by relying on their different adsorption forces. Adhesion stage: The first and second suction heads are driven by the adhesion drive module to attach the flat section of the tamper-evident label to the flat side of the color box. Then, the first and second suction heads are driven to switch to the staggered pushing posture. The suction force of the first suction head is reduced by the adsorption control component. The tamper-evident label is bent and shaped along the edge of the color box as the first and second suction heads push. Compaction stage: The adsorption force of the second suction head is reduced by the adsorption control component, and the adsorption force of the first suction head is cut off. The first and second suction heads work together to press and shape the label.

[0015] In one embodiment, during the adsorption stage, the negative pressure adjustment range of the first adsorption head is -10 to -25 kPa, and the negative pressure adjustment driving range of the second adsorption head is -45 to -60 kPa. During the attachment stage, the negative pressure of the first suction head is reduced to -5 kPa to 0 kPa.

[0016] Compared with the prior art, the present invention has at least the following advantages: 1. The color box anti-tamper label attaching device of the present invention, through the label adsorption component, two independent adsorption control air circuits and the attachment drive module, can complete the label gripping and bending shape at the same station, eliminating the labeling and corner folding process of traditional equipment at different stations and eliminating the errors caused by multiple positioning; at the same time, the two independent adsorption control air circuits can adjust the adsorption force of the two sets of label suction heads respectively, applying different suction forces to the flat section and the cross-edge section of the label, avoiding wrinkles, bubbles and edge curling problems during the bending and attaching process, and improving the attaching accuracy and appearance consistency of L-shaped labels.

[0017] 2. The automatic labeling equipment for tamper-evident labels on color boxes of the present invention, by setting up a conveying mechanism, a lifting and positioning device, a clamping component, and a labeling component, combined with a segmented pressure adjustment and application process, realizes continuous automated production of color box conveying, positioning, labeling, and secondary compaction, reduces manual intervention, improves the flatness and consistency of label application, avoids label rebound and incomplete application defects, reduces the production defect rate, and is suitable for mass packaging of color boxes for electronic products such as power banks and headphones. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly described below.

[0019] Figure 1 It is a type of color box.

[0020] Figure 2 This is a schematic diagram of the structure of an automatic labeling device for tamper-evident labels on color boxes according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of an automatic labeling device for tamper-evident labels on color boxes (removal frame) according to an embodiment of the present invention; Figure 4 for Figure 3 A magnified structural diagram of point A in the diagram; Figure 5 This is a schematic diagram of the label peeling mechanism in one embodiment of the present invention; Figure 6 This is a schematic diagram of the conveying mechanism, attaching device, lifting and positioning device, and clamping assembly in one embodiment of the present invention. Figure 7This is a schematic diagram of the lifting and positioning device in one embodiment of the present invention; Figure 8 This is a schematic diagram of the structure of a color box anti-tamper label attaching device according to an embodiment of the present invention; Figure 9 for Figure 3 A magnified structural diagram of section B in the diagram. Detailed Implementation

[0021] To facilitate understanding of the present invention, a more comprehensive description of the invention will be given below with reference to the accompanying drawings.

[0022] Please see Figures 1-9 As shown, an automatic labeling device 10 for tamper-evident boxes includes a labeling attachment device 100, a conveying mechanism 200, a lifting and positioning device 300, and a label peeling mechanism 400. The conveying mechanism 200 is sequentially provided with a feeding area, an attachment area, and a discharging area. The lifting and positioning device 300 is located below the attachment area of ​​the conveying mechanism 200. When the conveying mechanism 200 moves the color box 20 to the attachment area, the lifting and positioning device 300 is used to lift and position the color box 20 on the attachment area. The label peeling mechanism 400 is located on one side of the attachment area of ​​the conveying mechanism 200. The label peeling mechanism 400 is used to peel the label 21 off the label roll. The attachment device 100 is used to absorb the label 21 on the label peeling mechanism 400 and attach it to the color box 20.

[0023] It should be noted that during the application of tamper-evident labels to color boxes, the color box 20 is first moved manually or by a robotic arm to the loading area of ​​the conveyor mechanism 200. Then, the conveyor mechanism 200 transfers the color box 20 to the application area. The lifting and positioning device 300 in the application area is activated, lifting the color box 20 to the preset application position, completing the lifting and positioning operation. This prevents the color box 20 from shifting position during the application process, thereby improving the application quality. The label peeling mechanism 400 is independently arranged on the side of the application area, and is operated by a label peeling machine. The 400 mechanism separates the labels 21 on the roll of material one by one from the backing paper, continuously supplying the labeling device 100 with labels 21 to be adsorbed. After the label peeling mechanism 400 picks up and adsorbs the labels 21 that have been peeled off, the labeling device 100 affixes the labels 21 to the color box 20, completing the integrated affixing operation of the L-shaped labels 21 across the edges. After affixing, the lifting and positioning device 300 resets, and the color box 20 contacts the conveying mechanism 200, which continues to move the color box 20 to the unloading area for unloading. In this way, the entire process from loading the color box 20 to label affixing and unloading can be fully automated, reducing manual intervention, improving the overall production cycle, and improving affixing quality and efficiency, while ensuring the consistency and stability of the label affixing position. Moreover, the compact layout of each workstation reduces the equipment footprint.

[0024] Please see Figure 6 As shown, in one embodiment, the attaching device 100 further includes a clamping component 500, which is mounted on the conveying mechanism 200 and located on one side of the lifting and positioning device 300. The clamping component 500 is used to clamp and position the color box 20 on the attaching area. After the lifting and positioning device 300 completes the lifting and positioning of the color box 20, the clamping component 500 clamps the color box 20, providing lateral clamping and limiting of the color box 20 in the attaching state. This assists the lifting and positioning device 300 in constraining the lateral degree of freedom of the color box 20, thereby compensating for the deficiency of insufficient lateral limiting of a single lifting and positioning structure and preventing the color box 20 from shifting its position during the attaching process. This further improves the positioning stability of the color box 20, ensures the uniformity of the label 21 attaching position each time, and thus improves the consistency of the product appearance. In this embodiment, the clamping components 500 can be provided in two sets or in one set. Both sets of clamping components 500 simultaneously apply clamping force to both sides of the color box 20. When the conveying mechanism 200 itself has a limiting edge structure, only one set of clamping components 500 can be provided. Each clamping component 500 includes a clamping cylinder and a clamping block. The clamping cylinder is connected to the clamping block, and the clamping cylinder drives the clamping block to press one side of the color box 20 and perform a positioning operation on the color box 20. In this embodiment, positioning photoelectric sensors are provided in the feeding area, attaching area, and unloading area of ​​the conveying mechanism 200. Furthermore, as shown in the attached drawings, the sealing area of ​​the color box 20 requires double-sided application of tamper-evident labels 21. Correspondingly, two sets of attaching devices 100 and label peeling mechanisms 400 are required. The two sets of attaching devices 100 and label peeling mechanisms 400 are respectively located on both sides of the conveying mechanism 200, simultaneously realizing label peeling and attaching operations, thereby improving labeling efficiency.

[0025] In one embodiment, the conveying mechanism 200 can be a synchronous belt conveyor, with side guards provided on both sides of the conveying mechanism 200, thereby enabling stable conveying of the color box 20 and allowing the color box 20 to enter the labeling station in a consistent posture, avoiding offset problems caused by manual placement or unstable conveying, thus providing a stable foundation for subsequent labeling.

[0026] Please see Figure 5As shown, in one embodiment, the label peeling mechanism 400 can be an existing label peeling mechanism or the label peeling mechanism 400 of this invention, and there is no limitation. The label peeling mechanism 400 of this invention includes a label conveying assembly 410, a peeling plate, and a guiding assembly. The label 21 conveying assembly 410 includes a label reel and a feeding bracket, used to convey the backing paper with the label 21, so that the label 21 moves along the conveying path. The peeling plate is disposed on the label 21 conveying path, and one end of it forms a peeling edge. When the backing paper passes around the peeling plate, the label 21 separates from the backing paper under the action of inertia and structure. The guiding assembly is used to guide the backing paper, so that the backing paper bends along a preset path and separates from the label 21.

[0027] Please see Figure 6 and Figure 7 As shown, in one embodiment, the lifting and positioning device 300 includes a lifting bracket 310, a lifting support member 320, a blocking member 330, and a clamping member 340. The lifting support member 320 is disposed on the lifting bracket 310. The blocking member 330 and the clamping member 340 are respectively and sequentially spaced on both sides of the lifting support member 320 along the conveying direction of the conveying mechanism 200. The lifting support member 320 is used to support the color box 20 and lift the color box 20 to the preset attachment position; and the conveying mechanism 20 The labeling area is provided with a labeling edge strip 210 and a positioning block 220. The labeling edge strip 210 is located on the side of the color box 20, and the positioning block 220 is installed above the labeling edge strip 210. After the lifting support 320 lifts the color box 20 on the labeling area, the lifting support 320, the positioning block 220, the blocking member 330, the clamping member 340, the labeling edge strip 210 and the clamping assembly 500 respectively position the color box 20 up and down, left and right and front and back.

[0028] It should be noted that the lifting support 320 supports the color box 20 and completes the vertical lifting, achieving bottom support and height positioning of the color box 20; the blocking component 330 and clamping component 340 are arranged along the conveying direction, respectively restricting the left and right displacement of the color box 20; the labeling edge strip 210 of the conveying mechanism 200, together with the clamping component 500, constrains the front and back displacement of the color box 20; the positioning pressure block 220 presses down on the upper surface of the color box 20, restricting the vertical upward floating displacement of the color box 20; in this way, the positioning displacement freedom of the color box 20 can be locked simultaneously in six dimensions: up and down, left and right, front and back, so that the color box 20 remains stationary and fixed in the entire labeling process, completely solving the defects of traditional labeling equipment where the box body is prone to shaking and deviation, avoiding the problems of misalignment and wrinkles caused by the slight displacement of the color box 20 during the labeling and bending processes, thereby achieving the requirements of high-precision labeling operation and significantly reducing the product defect rate. Please refer to Figure 7As shown, in this embodiment, the lifting support 320 includes a lifting plate 321 and a lifting cylinder 322 that drives the lifting plate 321. The blocking member 330 and the clamping member 340 are respectively installed on both sides of the lifting plate 321 to facilitate movement with the lifting plate 321. The blocking member 330 includes a blocking block 331 and a blocking cylinder 332 that drives the blocking block 331. The clamping member 340 includes a clamping block 341 and a clamping cylinder 342 that drives the clamping block.

[0029] Please see Figure 9 As shown, in one embodiment, the automatic labeling equipment for tamper-evident labels on color boxes further includes a labeling component 600, which is mounted on the conveying mechanism 200 and is used to compact the tamper-evident labels 21 that have been affixed to the color box 20.

[0030] It should be noted that, since the adsorption head uses negative pressure to adsorb the label 21 in the previous labeling process, the adsorption has an adsorption force, which cannot ensure that the label 21 can be completely and tightly attached to the color box 20. Therefore, it is necessary to further add a label brushing component 600. By adding the label brushing component 600 and installing it on the unloading area of ​​the conveying mechanism 200, after the label 21 is initially bent and attached by the attaching device 100, the conveying mechanism 200 moves the color box 20 to the working area of ​​the label brushing component 600. A positioning photoelectric sensor is set in this area to control the action of each component. Under the transfer of the conveying mechanism 200, the color box 20 passes through the label brushing component 600, and the label 21 that has been attached is compacted a second time by squeezing, eliminating the small air bubbles and rebound lifting risks that may remain from the initial attachment, and strengthening the adhesion of the label 21. This delays the problem of edge lifting and delamination of the label 21 during long-term storage and ensures the anti-counterfeiting sealing performance of the tamper-evident label 21 in the long term. In this embodiment, the labeling assembly 600 includes a labeling cylinder 610 and a labeling block 620. The labeling block 620 is connected to the drive end of the labeling cylinder 610, and the labeling cylinder 610 is installed on the side of the conveying mechanism 200. Furthermore, when the color box 20 needs to have tamper-evident labels 21 affixed to both sides, two labeling assemblies 600 are also provided, with two labeling assemblies 600 positioned on both sides of the conveying mechanism 200, simultaneously performing labeling operations on the color box 20.

[0031] Please combine Figure 6 and Figure 8As shown, a color box tamper-evident label attaching device 100 includes: a label adsorption assembly 110, an adsorption control assembly, and an attachment drive module 120. The label adsorption assembly 110 includes a first label suction head 111 and a second label suction head 112. The first label suction head 111 is disposed corresponding to the label edge segment 21b, and the second label suction head 112 is disposed corresponding to the label plane segment 21a. The adsorption control assembly includes a first adsorption control air path and a second adsorption control air path. The first adsorption control air path is connected to the first label suction head 111, and the second adsorption control air path is connected to the second label suction head 112. Head 112 is connected, and the first adsorption control gas path and the second adsorption control gas path are independent of each other, so that the first adsorption head 111 and the second adsorption head 112 form differentiated adsorption forces, and the adsorption force of the first adsorption head 111 is less than that of the second adsorption head 112; the first adsorption head 111 and the second adsorption head 112 are respectively connected to the attachment driving module 120, which is used to drive the first adsorption head 111 and the second adsorption head 112 to switch between a flat posture and a staggered pushing posture, so as to drive the label 21 to complete the bending and attachment operation.

[0032] It should be noted that the label adsorption component 110 is divided into a first adsorption head 111 and a second adsorption head 112, respectively corresponding to the label side segment 21b and the label plane segment 21a, to independently adsorb the two areas of the L-shaped label 21. The adsorption control component is configured with two independent and non-interfering first and second adsorption control air paths, which are connected one-to-one to the corresponding adsorption heads. This abandons the traditional single-path uniform negative pressure supply mode and can independently control the adsorption suction of the two air paths. The adsorption force of the first adsorption head 111 corresponding to the side segment 21b is always less than that of the second adsorption head 112 corresponding to the plane segment 21a. The second adsorption head 112 acts as the main adsorption for the label 21, ensuring the positional stability of the label 21 and preventing displacement of the label 21 during transfer and attachment. The first adsorption head 111, with its smaller adsorption force, acts as an auxiliary adsorption for the label 21, thereby achieving adsorption and positioning of the label 21 and ensuring the consistency of the label 21's position. The first adsorption head 111 corresponds to the label side segment 21b. 1b, that is, the label 21 needs to be bent by the first suction head 111. If the suction force of the first suction head 111 is too large, the label 21 may be easily torn during the bending process. Therefore, it is necessary to reduce the negative pressure of the first suction head 111 so that the first suction head 111 can position the label 21 without tearing it during the bending process. In addition, during the bending and attaching process of the first suction head 111, the first suction head 111 always maintains a low-pressure suction state, and the first suction head 111 will be micro-adsorbed. The label 21 is gradually pushed onto the cross-side area of ​​the color box 20. That is, during the application process, the area of ​​the label cross-side 21b that has not yet been applied is always attracted and positioned by the first suction head 111. The negative pressure of the first suction head 111 is cut off only after the label cross-side 21b is completely applied to the cross-side area of ​​the color box 20. In this way, compared with the method of directly bending and applying the label after completely releasing the label cross-side 21b, the problem of label 21 wrinkling can be greatly avoided, thereby improving the appearance quality of the color box 20. Among them, the attachment drive module 120 serves as the power actuator, which can synchronously drive the first label suction head 111 and the second label suction head 112 to complete the overall extension and posture switching action. When initially adsorbing the label 21, the adsorption surfaces of the first label suction head 111 and the second label suction head 112 remain in a flat posture. When attaching and bending, the first label suction head 111 and the second label suction head 112 are staggered from each other. The second label suction head 112 remains in a fixed position, while the first label suction head 111 continues to push and bend the cross-side segment 21b of the label 21.Thus, differentiated adsorption is achieved through dual independent air paths. The label plane section 21a uses high suction to firmly adsorb the label 21, while the label side section 21b uses low suction to flexibly limit the label 21, effectively preventing stretching and tearing of the label side section 21b due to excessive suction. Combined with the application drive module 120 switching the label head's posture, L-shaped label 21 can be integrally bent and formed in a single station, eliminating the need for step-by-step transfer and secondary folding, thus eliminating error accumulation from multiple positioning steps and significantly improving the label 21's application accuracy and forming regularity. Furthermore, it is applicable to color boxes 20 of different thicknesses, improving the equipment's versatility.

[0033] In one embodiment, both the first and second adsorption control gas paths are equipped with a negative pressure regulating unit and an on / off control unit. The negative pressure regulating unit uses an electro-proportional valve in conjunction with a negative pressure sensor to form a closed-loop pressure regulating structure. This allows for stepless continuous adjustment of the negative pressure in the gas path, real-time acquisition of pipeline negative pressure signals, and feedback correction, enabling fine-tuning of the adsorption force to meet the pressure requirements of different processes such as adsorption, adhesion, and compaction. The on / off control unit uses a vacuum solenoid valve as the gas path switching actuator, independently controlling the conduction and cut-off states of a single gas path. The pressure regulation and on / off actions of the two gas paths do not interfere with each other, allowing for independent single-path pressure reduction, pressure relief, and gas cut-off operations to match the stress state of the label 21 at different operating stages. Simultaneously, the adsorption parameters can be flexibly adjusted according to the thickness, material, and size of the label 21, broadening the equipment's application range and improving defects such as edge curling, rebound, and air bubbles on the label 21. In this embodiment, the first suction head 111 and the second suction head 112 are both provided with a first airflow channel and a second airflow channel inside. At the same time, the end faces of the first suction head 111 and the second suction head 112 are provided with a first adsorption hole and a second adsorption hole. Each adsorption hole is connected to each airflow channel, and each airflow channel is connected to each adsorption control air path, so as to achieve mutual non-interference.

[0034] Please see Figure 8 As shown, in one embodiment, the tamper-evident label attaching device 100 for color boxes further includes a support frame 130 and a rotary drive component 140. The rotary drive component is mounted on the support frame 130, and the attaching drive module 120 is connected to the rotary drive component. The rotary drive component is used to drive the attaching drive module 120 to rotate, so that the label adsorption assembly 110 can perform a rotation operation. Since the label 21 peeled off by the label peeling mechanism 400 is placed horizontally and located below the attaching device 100, it is necessary to set the rotary drive component to drive the adsorption end of the label adsorption assembly 110 toward the label 21 on the label peeling mechanism 400 and adsorb and fix it, and then rotate it to the side of the color box 20 on the conveying mechanism 200 for adsorption operation. In this embodiment, the rotary drive component is a rotary cylinder.

[0035] Please see Figure 8As shown, in one embodiment, the attachment drive module 120 includes an attachment push cylinder 121, a first label holder fixing block 122, a second label holder sliding block 123, and an elastic label pressing structure 124. The first label holder fixing block 122 is connected to the attachment push cylinder 121, and the first label holder 111 is mounted on one end of the first label holder fixing block 122. A guide rail 122a is provided on the end of the first label holder fixing block 122 away from the attachment push cylinder 121. The second label holder sliding block 123 is slidably connected to the guide rail 122a. The second label holder 112 is disposed on one end of the second label holder sliding block 123, and the second label holder 112 is located on one side of the first label holder 111. The elastic label pressing structure 124 is connected to the first label holder fixing block 122 and the second label holder sliding block 123 respectively.

[0036] It should be noted that the label-attaching push cylinder 121 serves as a linear power source. The first label-absorbing head fixing block 122 is directly fixedly connected to the cylinder output end. The first label-absorbing head fixing block 122 is provided with a guide slide rail 122a. The second label-absorbing head sliding block 123 is slidably mounted on the guide slide rail 122a, realizing the sliding misalignment of the second label-absorbing head 112 relative to the first label-absorbing head 111. The elastic label-pressing mechanism is connected between the first label-absorbing head fixing block 122 and the second label-absorbing head sliding block to adsorb the label. At 21:00, the first label suction head 111 and the second label suction head 112 remain flush, and the elastic label pressing structure 124 is in an initial equilibrium state, ensuring that the entire label 21 is flatly adsorbed and evenly stressed. During the bending and attaching stage, the attaching push cylinder 121 continues to extend, driving the first label suction head fixing block 122 and the first label suction head 111 to continue to push forward, so that the first label suction head 111 presses the label cross-side segment 21b and bends along the edge of the color box 20. At the same time, the second label suction head 112 is flush with the label. The surface segment 21a remains stationary due to the rigid resistance of the flat sidewall of the color box 20, and cannot move forward further. At this time, relying on the relative motion relationship of the structure, the stationary second label suction head 112 pushes the second label suction head sliding block 123, causing the second label suction head sliding block 123 to move relative to the color box 20 along the guide rail 122a. The elastic label pressing structure 124 generates compressive elastic deformation with the relative sliding, and finally realizes the automatic misalignment and pushing posture of the first label suction head 111 relative to the second label suction head 112. The posture switching and label 21 bending action can be completed without two sets of independent drive structures, thereby simplifying the device structure and reducing equipment costs and control difficulty. At the same time, through the elastic label pressing structure 124, the second label suction head 112 achieves flexible label pressing on the color box 20, avoiding the rigid top pushing force from directly acting on the color box 20 and causing the box body to be squeezed and deformed. It takes into account the label 21 adhesion yield and the appearance integrity of the color box 20, and greatly improves the overall production yield and molding consistency.

[0037] In one embodiment, the elastic label-pressing structure 124 includes a spring fixing seat 124a, a spring mounting shaft 124b, and a spring. The spring fixing seat 124a is mounted on the first label-absorbing head fixing block 122. One end of the spring mounting shaft 124b is mounted on the second label-absorbing head sliding block 123, and the other end of the spring mounting shaft 124b slides through the spring fixing seat 124a. The spring is sleeved on the spring mounting shaft 124b and is located between the spring fixing block and the second label-absorbing head sliding block 123. When the second label-absorbing head sliding block 123 is displaced along the guide rail 122a, the sliding block will squeeze or stretch the spring. Utilizing the spring's own elastic extension and contraction characteristics, the instantaneous impact force during the sliding process is absorbed. After the displacement ends, the spring can automatically reset, allowing the two sets of label-absorbing heads to quickly return to their initial aligned posture.

[0038] A method for attaching tamper-evident labels 21 to a color box 20 is disclosed. This method corresponds to the mechanical structure and operational logic of the aforementioned attaching device 100, sequentially completing three continuous processes: adsorption, attachment, and compaction. The attaching device 100 controls the adsorption force of two sets of label suction heads through two independent negative pressure air paths. The negative pressure parameters are adjusted at different operational stages, and combined with the mechanical action of the relatively staggered pushing of the label suction heads, it adapts to the forming characteristics of the L-shaped label 21, where the plane adheres to the bent edge, ensuring that the label 21 is attached flat without stretching or deformation, forming a stable and repeatable automated attaching process. The specific method includes the following steps: S100 Adsorption Stage: The first suction head 111 and the second suction head 112 are driven by the attachment drive module 120 to maintain a flush posture; the adsorption control component ensures that the adsorption force of the first suction head 111 is less than that of the second suction head 112, and the peeled tamper-evident label 21 is adsorbed by the different adsorption forces of the two suction heads. The negative pressure adjustment range of the first suction head 111 is -10 to -25 kPa, preferably -15 kPa; the negative pressure adjustment drive range of the second suction head 112 is -45 to -60 kPa, preferably -50 kPa; ensuring that the adsorption force of the first suction head 111 corresponding to the label edge segment 21b is always less than the adsorption force of the second suction head 112 corresponding to the label plane segment 21a. By utilizing the different adsorption forces of two sets of suction heads, the entire tamper-evident label 21 that has been peeled off is simultaneously and evenly adsorbed. The second suction head 112 uses a larger negative pressure to stably fix the flat section 21a of the label, while the first suction head 111 uses a smaller negative pressure to limit the cross section 21b of the label, ensuring the positional stability of the label 21 during the adsorption process, thereby ensuring the consistency of the label 21's attachment position.

[0039] S200 Attachment Stage: The attachment drive module 120 first drives the first suction head 111 and the second suction head 112 to attach the tamper-evident label flat segment 21a to the flat side of the color box 20, and then drives the first suction head 111 and the second suction head 112 to switch to a staggered pushing posture; the adsorption control component lowers the adsorption force of the first suction head 111; the tamper-evident label 21 bends and forms along the edge of the color box 20 as the first suction head 111 and the second suction head 112 push. That is, the attachment drive module 120 first drives the two sets of suction heads in a flat posture to move closer to the color box 20, and accurately attaches the label flat segment 21a to the flat side wall of the color box 20, completing the initial attachment and positioning of the label flat segment 21a. Subsequently, the attaching and pushing cylinder 121 extends forward, driving the first label-absorbing head 111 forward. The second label-absorbing head 112 remains stationary due to the resistance of the side wall of the color box 20. The two sets of label-absorbing heads slide relative to each other, forming a staggered pushing posture. At the same time, the adsorption control component lowers the negative pressure of the first label-absorbing head 111 to an extremely low negative pressure range of -5kPa to 0kPa, such as -3kPa, significantly reducing the adsorption binding force of the label 21 across the edge segment 21b, reducing the negative pressure pulling resistance experienced by the label 21 during bending, while ensuring that the label edge segment 21b can still be adsorbed and limited by the first label-absorbing head 111. The label edge segment 21b moves smoothly with the first label-absorbing head 111 and naturally bends along the right-angle edge of the color box 20. During this attaching stage, the negative pressure of the second label-absorbing head 112 can remain stable or be slightly reduced from -50 kPa to -45 kPa. This avoids wrinkles and tears in the label's cross-side segment 21b during bending and application, thus improving the application quality of the label 21.

[0040] S300 Compaction Stage: The adsorption force of the second suction head 112 is reduced by the adsorption control component, and the adsorption force of the first suction head 111 is cut off. The first and second suction heads 111 and 112 work together to press and shape the label 21. For example, the negative pressure of the second suction head 112 is reduced to -20 kPa, and the negative pressure of the first suction head 111 is turned off or close to 0 kPa. The two sets of suction heads keep pressing against the label 21, and the L-shaped label 21 after bending is compacted and shaped as a whole, smoothing out the gaps and tiny air bubbles in the label 21 and reducing the occurrence of rebound and lifting problems.

[0041] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A device for attaching tamper-evident labels to color boxes, characterized in that, include: A label adsorption assembly, comprising a first label adsorption head and a second label adsorption head, wherein the first label adsorption head is configured to correspond to the cross-side segment of the label and the second label adsorption head is configured to correspond to the flat segment of the label; An adsorption control assembly includes a first adsorption control gas path and a second adsorption control gas path. The first adsorption control gas path is connected to a first adsorption head, and the second adsorption control gas path is connected to a second adsorption head. The first and second adsorption control gas paths are independent of each other, so that the first and second adsorption heads form differentiated adsorption forces, and the adsorption force of the first adsorption head is less than that of the second adsorption head. The attachment driving module is connected to the first label suction head and the second label suction head respectively. The attachment driving module is used to drive the first label suction head and the second label suction head to switch between a flat posture and a staggered pushing posture, so as to drive the label to complete the bending and attaching operation.

2. The color box tamper-evident label attaching device according to claim 1, characterized in that, Both the first adsorption control gas path and the second adsorption control gas path are equipped with a negative pressure adjustment unit and an on / off control unit.

3. The color box tamper-evident label attaching device according to claim 1, characterized in that, It also includes a support frame and a rotation drive component. The rotation drive component is mounted on the support frame, and the attachment drive module is connected to the rotation drive component. The rotation drive component is used to drive the attachment drive module to rotate, so that the label adsorption assembly can perform a rotation operation.

4. The color box tamper-evident label attaching device according to claim 1, characterized in that, The attachment drive module includes an attachment push cylinder, a first label holder fixing block, a second label holder sliding block, and an elastic label pressing structure. The first label holder fixing block is connected to the attachment push cylinder, and the first label holder is mounted on one end of the first label holder fixing block. A guide rail is provided on the end of the first label holder fixing block away from the attachment push cylinder. The second label holder sliding block is slidably connected to the guide rail, and the second label holder is located at one end of the second label holder sliding block, and the second label holder is located on one side of the first label holder. The elastic label pressing structure is connected to both the first label holder fixing block and the second label holder sliding block.

5. The color box tamper-evident label attaching device according to claim 4, characterized in that, The elastic label pressing structure includes a spring fixing seat, a spring mounting shaft, and a spring. The spring fixing seat is mounted on the first label suction head fixing block. One end of the spring mounting shaft is mounted on the second label suction head sliding block, and the other end of the spring mounting shaft slides through the spring fixing seat. The spring is sleeved on the spring mounting shaft and is located between the spring fixing block and the second label suction head sliding block.

6. An automatic labeling device for tamper-evident labels on color boxes, characterized in that, The color box tamper-evident label attaching device, as described in any one of claims 1-5, further includes a conveying mechanism, a lifting and positioning device, and a label peeling mechanism; The conveying mechanism is provided with a feeding area, an attaching area and an unloading area in sequence. The lifting and positioning device is located below the attaching area of ​​the conveying mechanism. When the conveying mechanism moves the color box to the attaching area, the lifting and positioning device is used to lift and position the color box on the attaching area. The label peeling mechanism is located on the side of the conveying mechanism corresponding to the attachment area. The label peeling mechanism is used to peel the label off the label roll. The attachment device is used to adsorb the label on the label peeling mechanism and attach it to the color box.

7. The automatic labeling equipment for tamper-evident labels on color boxes according to claim 6, characterized in that, It also includes a clamping assembly, which is mounted on the conveying mechanism and located on one side of the lifting and positioning device. The clamping assembly is used to clamp and position the color box on the attachment area.

8. The automatic labeling equipment for tamper-evident labels on color boxes according to claim 7, characterized in that, The lifting and positioning device includes a lifting bracket, a lifting support, a blocking member, and a clamping member. The lifting support is disposed on the lifting bracket. The blocking member and the clamping member are respectively arranged at intervals on both sides of the lifting support along the conveying direction of the conveying mechanism. The lifting support is used to support the color box and lift the color box to the preset affixing position. The conveying mechanism is provided with a labeling edge strip and a positioning pressure block corresponding to the affixing area. The labeling edge strip is located on the side of the color box, and the positioning pressure block is installed above the labeling edge strip. After the lifting support lifts the color box on the affixing area, the lifting support, the positioning pressure block, the blocking member, the clamping member, the labeling edge strip, and the clamping assembly respectively position the color box vertically, horizontally, and front-back.

9. The automatic labeling equipment for tamper-evident labels on color boxes according to claim 8, characterized in that, It also includes a labeling assembly, which is mounted on the conveying mechanism and is used to compact the tamper-evident labels already affixed to the color box.

10. A method for attaching tamper-evident labels to color boxes, characterized in that, The steps are as follows: Adsorption stage: The first and second suction heads are driven to maintain a flush position by the attachment drive module; the adsorption control component makes the adsorption force of the first suction head less than that of the second suction head, and the two suction heads adsorb the peeled tamper-evident label together by relying on their different adsorption forces. Adhesion stage: The first and second label suction heads are first driven by the adhesion driving module to attach the flat section of the tamper-evident label to the flat side of the color box, and then the first and second label suction heads are driven to switch to the staggered pushing posture. The adsorption force of the first suction head is reduced by the adsorption control component; the tamper-evident label is bent and shaped along the edge of the color box as the first and second suction heads push. Compaction stage: The adsorption force of the second suction head is reduced by the adsorption control component, and the adsorption force of the first suction head is cut off. The first and second suction heads work together to press and shape the label.

11. The method for attaching tamper-evident labels to color boxes according to claim 10, characterized in that, During the adsorption stage, the negative pressure adjustment range of the first adsorption head is -10 to -25 kPa, and the negative pressure adjustment driving range of the second adsorption head is -45 to -60 kPa. During the attachment stage, the negative pressure of the first suction head is reduced to -5 kPa to 0 kPa.

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