Single-label surrounding type pneumatic labeling machine and working method thereof

Abstract

The invention discloses a single-label surrounding type pneumatic labeling machine and a working method thereof. The pneumatic labeling machine comprises a grabbing mechanism, a label belt conveying mechanism and a pneumatic labeling mechanism. The grabbing mechanism comprises a horizontal moving assembly, a height moving assembly and two clamping jaws which are oppositely arranged, each clamping jaw comprises an upper clamping piece and a lower clamping piece which are arranged corresponding to the labeling piece, a side plate is arranged between the upper clamping piece and the lower clamping piece, and an airflow cavity is formed among the upper clamping piece, the lower clamping piece, the side plate and the clamping pieces; the distance between the ends, close to the pneumatic labeling mechanism, of the two side plates is larger than the length of a label, by changing the clamping jaw structure, the upper clamping piece, the lower clamping piece, an airflow cavity formed between the side plates and the clamping pieces, the flowing direction of airflow is guided through the airflow cavity, and labeling of the side ends and the rear end of a labeling piece through the pneumatic labeling machine is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of labeling, and in particular to a single-label wraparound pneumatic labeling machine and a working method thereof. Background Art

[0002] A labeling machine is a device used to automatically attach labels to the surface of products, packages or containers. Labeling machines are widely used in food, beverage, cosmetics, pharmaceuticals, daily chemicals, chemicals and other industries to improve production efficiency and ensure accurate label attachment.

[0003] According to different application scenarios and labeling requirements, labeling machines can be divided into many types, one of which is an air-blowing labeling machine. For example, the patent with authorization announcement number CN217649804U discloses an air-blowing and air-suction labeling machine, which includes a connecting plate, a suction-blowing label head, a three-axis adjustment mechanism and a labeling arm, wherein the labeling arm is connected to the connecting plate through a three-axis adjustment mechanism, the suction-blowing label head is arranged at the lower end of the labeling arm, and moves up and down through the drive of the labeling arm.

[0004] Although the above-mentioned air-blowing labeling machine can meet the labeling tasks in most situations, the following problems still exist: (1) The suction and blowing label head of the air-blowing labeling machine is generally designed to form airflow pressure between the label and the product surface, by adsorbing the label and blowing it onto the target surface. When the surface of the product is relatively flat and the label attachment surface is close to the airflow direction, the airflow can effectively cover and complete the labeling. However, when it is necessary to label the rear end of the product, due to the limitations of the airflow direction and nozzle position, the airflow cannot effectively cover the rear end of the product, resulting in rear end labeling failure; (2) When performing side labeling, the airflow direction of the air-blowing label head is usually blown in a horizontal or vertical direction parallel to the product surface, and the angle with the product surface will affect the concentration of the airflow. In particular, when there is a large angle between the airflow direction and the side of the product, it is difficult for the airflow to form positive pressure on the product surface, which may result in the label not being fully adsorbed or attached, resulting in poor labeling effect; (3) For some irregular and complex-shaped products (such as objects with curved, bent or concave surfaces), it may be difficult for the air-blowing labeling machine to achieve uniform label attachment on these surfaces because it cannot adjust the airflow direction according to different shapes. It is difficult for the airflow of the air-blowing method to provide sufficient pressure for each position on the complex surface, thus affecting the accuracy and attachment quality of the label; (4) Since the airflow will gradually diffuse within a certain range, if the airflow system of the labeling machine is not designed accurately, the airflow may lose a certain degree of concentration or uniformity during the transmission process, resulting in the label not being properly attached. The diffusion of the airflow may cause the label's pasting area to be not tight enough, resulting in undesirable phenomena such as warping and bubbling, affecting the appearance and use effect. Summary of the invention

[0005] Purpose of the invention: The purpose of the present invention is to provide a single-label wraparound pneumatic labeling machine and a working method thereof, so as to solve the problem that the pneumatic labeling machine in the prior art can only be used for labeling the front of the product.

[0006] Technical solution:

[0007] A single-label wrap-around pneumatic labeling machine comprises a gripping mechanism, a label belt conveying mechanism and a pneumatic labeling mechanism; the gripping mechanism comprises a horizontal moving component, a height moving component and two clamping jaws arranged opposite to each other, the clamping jaws comprise an upper clamping member and a lower clamping member arranged corresponding to a labeling member, a side plate is arranged between the upper clamping member and the lower clamping member, an airflow cavity is formed between the upper clamping member, the lower clamping member, the side plate and the labeling member, and a distance between one end of the two side plates close to the pneumatic labeling mechanism is greater than the length of the label.

[0008] The main invention point of the present invention is that by changing the clamping claw mechanism, an airflow cavity is formed between the upper clamping member, the lower clamping member, the side plate and the clamping member, and the flow direction of the airflow is guided by the airflow cavity to enable the pneumatic labeling machine to label the side and rear ends of the labeling member.

[0009] Preferably, the distance between the side plate and the clamped rear labeling piece gradually decreases from the end close to the pneumatic labeling mechanism to the end away from the pneumatic labeling mechanism, and the cross-sectional area of ​​the airflow cavity gradually decreases from the end close to the pneumatic labeling mechanism to the end away from the pneumatic labeling mechanism. The structure of the airflow cavity is further arranged so that the airflow cavity gradually decreases along the labeling direction. According to the Bernoulli principle, the speed of the rear airflow is increased, and the pressure of the airflow on the label is also increased, so that the label can be quickly and stably attached to the labeling piece.

[0010] Preferably, the end of the clamp away from the pneumatic labeling mechanism is provided with a guide partition plate to prevent the airflows on both sides from impacting each other. The guide partition plate is provided to avoid the airflows on both sides of the labeling piece colliding with each other, causing airflow deceleration and instability, thereby improving the labeling effect and stability.

[0011] Preferably, the top end of the guide partition plate is fixedly connected to the upper clamping member, the bottom end of the guide partition plate is fixedly connected to the lower clamping member, and the middle section of the guide partition plate and the side plate form an airflow outlet.

[0012] Preferably, the airflow cavity is a smooth curved channel to reduce the resistance encountered by the airflow when turning.

[0013] Preferably, the pneumatic labeling mechanism includes a mounting seat and a first cylinder for controlling the lifting and lowering of the mounting seat, the mounting seat is provided with an airflow generator, the airflow generator is connected to a labeling plate, the labeling plate is provided with a plurality of airflow outlets, and the labeling plate is connected to a second cylinder for controlling its approach and distance from a transplanting mechanism.

[0014] Preferably, the label tape conveying mechanism comprises an unwinding roller, a conveying roller and a winding roller which are sequentially arranged along the conveying direction of the label tape, and the number of the conveying rollers is greater than or equal to one.

[0015] The present invention also discloses a working method of a single-label wraparound pneumatic labeling machine, comprising the following steps:

[0016] 1) The grabbing mechanism grabs the labeling part from the conveyor belt and moves to the front end of the pneumatic labeling mechanism. After grabbing the labeling part, an airflow cavity with a cross-sectional area gradually decreasing from the end close to the pneumatic labeling mechanism to the end away from the pneumatic labeling mechanism is formed between the upper clamping part, the lower clamping part, the side plate and the labeling part;

[0017] 2) The first cylinder drives the mounting seat to move, thereby driving the labeling plate to move to the front end of the label conveyor belt. The airflow generator generates negative pressure to adsorb the labels on the label conveyor belt to the labeling plate. The first cylinder continues to drive the mounting seat to move, thereby driving the labeling plate to move to the position directly opposite the labeling part. The second cylinder drives the labeling plate to move the labeling plate to a position close to the labeling part.

[0018] 3) The airflow generator generates positive pressure to blow the label toward the labeling object. During this process, the airflow drives the label to move along the direction in which the airflow cavity gradually shrinks. As the airflow cavity gradually shrinks, the airflow speed increases, and the pressure on the label increases. The airflow gradually moves along the airflow cavity and sticks the label to the label.

[0019] Preferably, step 1) and step 2) are performed simultaneously.

[0020] Preferably, in step 3), the airflow generator continuously generates positive pressure until labeling is completed.

[0021] Beneficial effect: By changing the structure of the clamping claws, an airflow cavity is formed between the upper clamping part, the lower clamping part, the side plate and the labeling part. The airflow direction is guided by the airflow cavity, so that the pneumatic labeling machine can label the side and rear ends of labeling parts of various shapes. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a stereogram of the present invention;

[0023] Figure 2 is a cross-sectional view of the present invention;

[0024] Figure 3 is an enlarged stereogram of the grabbing mechanism of the present invention;

[0025] Figure 4 It is an enlarged stereoscopic view of the clamping jaw of the present invention in one direction;

[0026] Figure 5 It is an enlarged stereoscopic view of the clamping jaw of the present invention from another direction;

[0027] Figure 6 is a cutaway perspective view of the clamping jaw of the present invention;

[0028] Description of reference numerals:

[0029] 1. Grabbing mechanism; 11. Horizontal moving assembly; 12. Height moving assembly; 13. Clamping claw; 131. Upper clamping piece; 132. Lower clamping piece; 133. Side plate; 134. Airflow chamber; 135. Guide partition plate; 2. Label tape conveying mechanism; 21. Unwinding roller; 22. Conveying roller; 23. Rewinding roller; 3. Pneumatic labeling mechanism; 31. Airflow generator; 32. Labeling plate. DETAILED DESCRIPTION

[0030] In order to make the technical solution of the present invention clearer, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0031] Example 1

[0032] like Figure 1-6 As shown, a single-label wrap-around pneumatic labeling machine includes a gripping mechanism 1, a label belt conveying mechanism 2 and a pneumatic labeling mechanism 3; the gripping mechanism 1 includes a horizontal moving component 11, a height moving component 12 and two clamping jaws 13 arranged opposite to each other, the clamping jaw 13 includes an upper clamping member 131 and a lower clamping member 132 arranged corresponding to the labeling member, a side plate 133 is arranged between the upper clamping member and the lower clamping member, an airflow cavity 134 is formed between the upper clamping member 131, the lower clamping member 132, the side plate 133 and the clamping member, and the distance between the two side plates 133 near one end of the pneumatic labeling mechanism 3 is greater than the length of the label. By changing the structure of the clamping jaws, an airflow cavity 134 is formed between the upper clamping member 131, the lower clamping member 132, the side plate 133 and the labeling member, and the airflow cavity 134 guides the flow direction of the airflow, so that the pneumatic labeling machine can label the side end and the rear end of the labeling member.

[0033] In this embodiment, the distance between the side plate 133 and the clamped rear labeling piece gradually decreases from the end close to the pneumatic labeling mechanism 3 to the end away from the pneumatic labeling mechanism 3, and the cross-sectional area of ​​the airflow cavity 134 gradually decreases from the end close to the pneumatic labeling mechanism 3 to the end away from the pneumatic labeling mechanism 3. The structure of the airflow cavity 135 is further arranged so that the airflow cavity 135 gradually decreases along the labeling direction. According to the Bernoulli principle, the speed of the rear airflow is increased, and the pressure of the airflow on the label is also increased, so that the label can be quickly and stably attached to the labeling piece.

[0034] The horizontal moving component 11 and the height moving component 12 can adopt a ball screw drive structure, a belt drive structure or a linear guide DC motor drive structure; the ball screw is driven by a stepper motor or a servo motor, and can provide high-precision and high-stability linear motion. The ball screw structure is suitable for occasions requiring high precision, and can achieve smooth and gapless horizontal movement; the belt drive is a relatively simple and economical horizontal movement method, which is suitable for applications with small loads and not requiring extremely high precision. The two ends of the belt can be fixed on the frame, and the motor drives the belt to drive the grabbing mechanism to move in the horizontal direction; the combination of linear guides and DC motors can achieve smoother horizontal movement. The linear guide can reduce friction and increase the service life of the overall system. Which structure to use is based on comprehensive considerations of factors such as precision, stability, and cost in actual use.

[0035] In this embodiment, the upper clamping members 131 of the clamping jaws 13 on both sides can adopt a structure that abuts when clamping, and the lower clamping member 132 adopts the same structure, so that the airflow cavity on both sides of the labeling member can form a structure with only one airflow inlet close to the labeling plate 32 and one airflow outlet away from the labeling plate 32. The size of the labeling plate 32 is set to be adapted to the side panels 133 of the two clamping jaws, the upper clamping member 131, and the lower clamping member 132 The same size of the airflow inlet at one end of the labeling plate has a structure, so that the labeling plate can be directly extended into the airflow inlet during positive pressure labeling to avoid airflow escape and improve the labeling effect.

[0036] In this embodiment, the end of the clamp 13 away from the pneumatic labeling mechanism 3 is provided with a guide partition plate 135 to prevent the airflows on both sides from impacting each other. The guide partition plate is provided to prevent the airflows on both sides of the labeling piece from colliding and causing airflow deceleration and instability, thereby improving the labeling effect and stability.

[0037] In this embodiment, the top end of the guide partition plate 135 is fixedly connected to the upper clamp 131, the bottom end of the guide partition plate 135 is fixedly connected to the lower clamp 132, and the middle section of the guide partition plate 135 and the side plate form an airflow outlet.

[0038] In this embodiment, the airflow cavity is a smooth curve channel. This structure is used to reduce the resistance of the airflow when turning. The smooth curve channel is more of a side plate with a smooth curve cross section, because the structure of the labeling part cannot be controlled and is set according to actual needs.

[0039] In this embodiment, the pneumatic labeling mechanism 3 includes a mounting seat and a first cylinder for controlling the lifting and lowering of the mounting seat. An airflow generator 31 is provided on the mounting seat. The airflow generator 31 is connected to a labeling plate 32. The labeling plate 32 is provided with multiple airflow outlets. The labeling plate 32 is connected to a second cylinder for controlling its approach and distance from a transplanting mechanism.

[0040] The labeling plate is provided with a plurality of airflow outlets, through which the airflow is evenly distributed to the label surface, thereby ensuring that the label can be smoothly transported from the label belt to the labeling piece under the push of the airflow. During operation, the first cylinder drives the mounting seat to move, so that the labeling plate can smoothly move to the front end of the label and adsorb the label to the labeling plate.

[0041] In this embodiment, the label tape conveying mechanism 2 comprises an unwinding roller 21, a conveying roller 22 and a winding roller 23 which are sequentially arranged along the conveying direction of the label tape, and the number of the conveying rollers is greater than or equal to one.

[0042] The configuration of multiple conveyor rollers can ensure the stable conveyance of the label tape, and the tension of the label tape can be accurately controlled through a reasonable transmission system, thereby ensuring that the label tape will not deviate or wrinkle during the labeling process, ensuring the smooth progress of the labeling process.

[0043] The grabbing mechanism 1, the label tape conveying mechanism 2 and the pneumatic labeling mechanism 3 can be connected to a control system to achieve precise regulation.

[0044] The core innovation of this single-label wraparound pneumatic labeling machine is to optimize the label attachment effect through a carefully designed airflow chamber structure. Specifically, the gripping mechanism 1 includes two clamping jaws 13, in which an airflow chamber 134 is formed inside the clamping jaws. The cross-sectional area of ​​the airflow chamber gradually decreases, effectively guiding the airflow to accelerate, thereby increasing the pressure and flow rate on the label during the label attachment process. The pneumatic labeling mechanism absorbs the label through an airflow generator and blows it toward the labeling piece. The speed of the airflow gradually increases to ensure that the label is stable and quickly attached. The design of the side panels and guide partitions further ensures the stability of the airflow, avoids airflow impact interference, and improves labeling stability. In the end, the entire system is able to perform gripping and labeling at the same time, achieving efficient and precise operation.

[0045] It can be understood that the figure shows a cylindrical object, but in actual application it is not limited to the structure of the object, and only needs to use a clamp with a corresponding structure.

[0046] The present invention also discloses a working method of a single-label wraparound pneumatic labeling machine, comprising the following steps:

[0047] 1) The grabbing mechanism grabs the labeling part from the conveyor belt and moves to the front end of the pneumatic labeling mechanism. After grabbing the labeling part, an airflow cavity with a cross-sectional area gradually decreasing from the end close to the pneumatic labeling mechanism to the end away from the pneumatic labeling mechanism is formed between the upper clamping part, the lower clamping part, the side plate and the labeling part;

[0048] 2) The first cylinder drives the mounting seat to move, thereby driving the labeling plate to move to the front end of the label conveyor belt. The airflow generator generates negative pressure to adsorb the labels on the label conveyor belt to the labeling plate. The first cylinder continues to drive the mounting seat to move, thereby driving the labeling plate to move to the position directly opposite the labeling part. The second cylinder drives the labeling plate to move the labeling plate to a position close to the labeling part.

[0049] 3) The airflow generator generates positive pressure to blow the label to the labeling part. During this process, the airflow drives the label to move along the direction in which the airflow cavity gradually shrinks. As the airflow cavity gradually shrinks, the airflow speed increases, and the pressure on the label increases. The airflow gradually moves along the airflow cavity and sticks the label to the labeling part.

[0050] Preferably, step 1) and step 2) are performed simultaneously to improve work efficiency.

[0051] Preferably, in step 3), the airflow generator continuously generates positive pressure until labeling is completed to avoid insufficient airflow impact force.

[0052] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A single label wrap-around pneumatic labeling machine, characterized in that: The invention comprises a gripping mechanism (1), a label belt conveying mechanism (2) and a pneumatic labeling mechanism (3); the gripping mechanism (1) comprises a horizontal moving component (11), a height moving component (12) and two clamping jaws (13) arranged opposite to each other; the clamping jaws (13) comprise an upper clamping member (131) and a lower clamping member (132) arranged corresponding to a labeling member; a side plate (133) is arranged between the upper clamping member and the lower clamping member; an airflow cavity (134) is formed between the upper clamping member, the lower clamping member, the side plate and the labeling member; and a distance between the two side plates (133) at one end close to the pneumatic labeling mechanism (3) is greater than the length of the label.

2. A single-label wraparound pneumatic labeling machine according to claim 1, characterized in that: The distance between the side plate (133) and the clamped rear labeling member gradually decreases from an end close to the pneumatic labeling mechanism to an end away from the pneumatic labeling mechanism, and the cross-sectional area of ​​the airflow cavity (134) gradually decreases from an end close to the pneumatic labeling mechanism to an end away from the pneumatic labeling mechanism.

3. A single-label wraparound pneumatic labeling machine according to claim 1 or 2, characterized in that: An end of the clamping jaw (13) away from the pneumatic labeling mechanism (3) is provided with a flow guide partition plate (135) for preventing airflows on both sides from impacting each other.

4. The single-label wraparound pneumatic labeling machine according to claim 3, characterized in that: The top end of the flow guide partition plate is fixedly connected to the upper clamping piece, the bottom end of the flow guide partition plate is fixedly connected to the lower clamping piece, and the middle section of the flow guide partition plate and the side plate form an air flow outlet.

5. A single-label wraparound pneumatic labeling machine according to claim 1 or 2, characterized in that: The airflow cavity is a smooth curved channel.

6. The single-label wraparound pneumatic labeling machine according to claim 1, characterized in that: The pneumatic labeling mechanism (3) comprises a mounting seat and a first cylinder for controlling the lifting of the mounting seat, the mounting seat is provided with an airflow generator (31), the airflow generator (31) is connected to a labeling plate (32), the labeling plate (32) is provided with a plurality of airflow outlets, and the labeling plate (32) is connected to a second cylinder for controlling its approach to and away from a transplanting mechanism.

7. The single-label wraparound pneumatic labeling machine according to claim 1, characterized in that: The label tape conveying mechanism (2) comprises an unwinding roller (21), a conveying roller (22) and a winding roller (23) which are arranged in sequence along the conveying direction of the label tape, and the number of the conveying rollers is greater than or equal to one.

8. A working method of the single-label wraparound pneumatic labeling machine as claimed in any one of claims 1 to 7, characterized in that: The following steps are involved: 1) The grabbing mechanism grabs the labeling part from the conveyor belt and moves to the front end of the pneumatic labeling mechanism. After grabbing the labeling part, an airflow cavity with a cross-sectional area gradually decreasing from the end close to the pneumatic labeling mechanism to the end away from the pneumatic labeling mechanism is formed between the upper clamping part, the lower clamping part, the side plate and the labeling part; 2) The first cylinder drives the mounting seat to move, thereby driving the labeling plate to move to the front end of the label conveyor belt. The airflow generator generates negative pressure to adsorb the labels on the label conveyor belt to the labeling plate. The first cylinder continues to drive the mounting seat to move, thereby driving the labeling plate to move to the position directly opposite the labeling part. The second cylinder drives the labeling plate to move the labeling plate to a position close to the labeling part. 3) The airflow generator generates positive pressure to blow the label to the labeling part. During this process, the airflow drives the label to move along the direction in which the airflow cavity gradually shrinks. As the airflow cavity gradually shrinks, the airflow speed increases, and the pressure on the label increases. The airflow gradually moves along the airflow cavity and puts the label on the labeling part.

9. The working method of a single-label wraparound pneumatic labeling machine according to claim 8, characterized in that: The steps 1) and 2) are performed simultaneously.

10. The working method of a single-label wraparound pneumatic labeling machine according to claim 8, characterized in that: In step 3), the airflow generator continuously generates positive pressure until labeling is completed.

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