An inner wall labeling machine

By designing an automated inner wall labeling machine, the problem of missing label feeding and peeling units in existing technologies has been solved, achieving precise label application on the inner wall of the product and efficient automated operation, thereby improving production efficiency.

CN122443797APending Publication Date: 2026-07-24浙江康凌机械制造有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
浙江康凌机械制造有限公司
Filing Date
2026-04-28
Publication Date
2026-07-24

AI Technical Summary

Technical Problem

The existing inner wall labeling machine lacks a label feeding unit and a label peeling unit, which makes it impossible to achieve automated continuous operation. The yarn package needs to be manually clamped, which is inefficient and can only be labeled on one yarn package at a time.

Method used

An inner wall labeling machine was designed, including a transfer device, a labeling device, and a labeling device, which realizes automatic label peeling, automatic product conveying and clamping. Through horizontal moving components, labeling telescopic components, and rotating components, it ensures that the label is accurately attached to the inner wall of the product and supports dual-station operation.

Benefits of technology

The process of labeling the inner wall has been automated, which has improved production efficiency, ensured the accuracy and adaptability of the labels on the inner wall, reduced manual intervention, and improved production efficiency.

✦ Generated by Eureka AI based on patent content.

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Abstract

The present application relates to the technical field of labeling equipment, and particularly relates to an inner wall labeling machine, which comprises a rack, a transfer device for conveying products, and a labeling device for conveying labels, the transfer device is arranged on the rack, the labeling device is arranged on the transfer device and is used for labeling the labels on the inner wall of the products, the labeling device is arranged on one side of the transfer device, the labeling device peels off the labels from a label tape, the labeling device adsorbs the labels and rotates to above the products, the labeling device moves downward, the labels are moved to the inner cavity of the middle part of the products and are attached to the inner wall of the products, the transfer device is sequentially provided with a first sensor for detecting the position of the products, a baffle assembly for blocking the next product, a second sensor for detecting the position of the products, and a clamping assembly for automatically positioning the products along the conveying direction of the products, and the clamping assembly is located below the labeling device, and the present application has the beneficial effect of realizing the automation of the whole labeling process.
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Description

Technical Field

[0001] This invention relates to the field of labeling equipment technology, and more specifically to an inner wall labeling machine. Background Technology

[0002] Labeling machines are devices that affix rolls of self-adhesive labels to products and are an indispensable part of modern packaging.

[0003] Patent application CN202511556585.X discloses an automatic labeling device for an adaptive cylindrical or conical bobbin yarn inner wall structure. According to paragraphs

[0022] to

[0029] of the specification and the accompanying drawings... Figures 1 to 3 It can be seen that the label is adsorbed by the curved surface bonding block, and then the axial telescopic component drives the end bonding mechanism to rise and fall to the middle height of the product. Then the axial rotation component drives the end labeling mechanism to rotate to the central axis of the product. Then the radial telescopic component inserts the label adsorbed by the curved surface bonding block into the middle of the product and affixes the label to the inner wall of the product. Then the radial telescopic component resets and moves out of the product, so that the next product can be installed on the yarn rotating mechanism for the next labeling.

[0004] The above-mentioned device has the following disadvantages in actual use: 1. It lacks a label feeding unit and a label peeling unit, making it impossible to achieve automated continuous operation; 2. The yarn package needs to be manually clamped, which is inefficient and cannot achieve automated operation; 3. It can only perform labeling operation on one yarn package at a time, which is inefficient. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide an inner wall labeling machine that automates the entire labeling process, addressing the shortcomings of the prior art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an inner wall labeling machine, comprising a frame, wherein the frame is provided with a product conveying transfer device and a labeling device for conveying labels, the transfer device is provided with a labeling device for affixing labels to the inner wall of the product, the labeling device is disposed on one side of the transfer device, the labeling device peels the label off the label from the label tape, the labeling device adsorbs the label and rotates it above the product, the labeling device moves downward, causing the label to move to the inner cavity of the product and adhere to the inner wall of the product, the transfer device is provided with a first sensor for detecting the product position, a baffle assembly for blocking the next product, a second sensor for detecting the product position, and a clamping assembly for automatically positioning the product along the product conveying direction, the clamping assembly being located below the labeling device.

[0007] The present invention, which has the above-mentioned features, achieves automatic peeling of labels from label tape by setting up a labeling device, and achieves automatic conveying, automatic blocking and automatic clamping of products by setting up a transfer device, thereby realizing the automation of the entire labeling process.

[0008] A further embodiment of the present invention is as follows: the labeling device includes a labeling frame, a horizontal moving component, a labeling telescopic component, a labeling rotating component, and a label suction head. The labeling frame is mounted above the transfer device, the horizontal moving component is connected above the labeling frame, the labeling telescopic component is linked to the horizontal moving component, the labeling rotating component is linked to the output end of the labeling telescopic component, the horizontal moving component drives the labeling head to move horizontally, the labeling rotating component drives the label suction head to rotate, and the labeling telescopic component drives the labeling head to extend into or move out of the product cavity.

[0009] The present invention, possessing the above-mentioned features, has a curved label-absorbing die head that allows the label to bend naturally when absorbing the label, enabling it to conform to the inner wall of the product. The labeling frame is positioned above the transfer device. The horizontal moving component drives the labeling telescopic component and the labeling rotating component to move horizontally to the label-picking or labeling position. The labeling telescopic component drives the labeling rotating component and the label-absorbing die head to vertically extend into or out of the product cavity. The labeling rotating component drives the label-absorbing die head to absorb the label and rotate it above the product, adjusting the label's adhesion angle so that the label-absorbing die head can flexibly adjust the label-picking and labeling posture according to the depth and diameter of the product's inner cavity, thereby ensuring the label's adhesion accuracy and adaptability on the inner wall.

[0010] A further feature of the present invention is that the horizontal moving component includes a fixed base, a connecting screw, and a moving base. The connecting screw is disposed within the fixed base, the moving base is threadedly connected to the connecting screw and slidably engaged with the fixed base, the moving base is connected to a mounting bracket, and the labeling telescopic component is disposed on the mounting bracket.

[0011] The present invention with the above features: when the connecting screw in the fixed seat rotates, it drives the movable seat that is threadedly connected to it to slide horizontally along the fixed seat. The movable seat drives the mounting bracket and the labeling telescopic component to move synchronously, so that the stroke control of the horizontal movement is precise and the operation is smooth. At the same time, the sliding cooperation between the movable seat and the fixed seat reduces the shaking and swaying during the movement, thereby ensuring the positioning accuracy and repeatability of the labeling device when switching between the label taking station and the labeling station.

[0012] A further feature of the present invention is that the labeling telescopic assembly includes a telescopic cylinder and a telescopic seat. The mounting bracket is provided with a guide rail. The telescopic seat slides with the guide rail via a guide slider. The body of the telescopic cylinder is mounted on the mounting bracket and its output end is connected to the telescopic seat. The labeling rotation assembly is linked with the telescopic seat.

[0013] The present invention, which has the above-mentioned features, has the following characteristics: the body of the telescopic cylinder is fixed on the mounting bracket, and its output end pushes the telescopic seat to move vertically along the guide rail. The telescopic seat ensures the linearity and stability of the movement direction through the sliding cooperation between the guide slider and the guide rail. The labeling rotating component rises and falls synchronously with the telescopic seat. When the labeling device moves above the product, the telescopic cylinder pushes the label suction head to extend into the inner cavity of the product to complete the labeling. After the labeling is completed, the telescopic cylinder resets to make the label suction head exit the product. The driving action is fast and the response is sensitive, which reduces the waiting time in the labeling process and thus improves the labeling efficiency.

[0014] A further feature of the present invention is that the labeling rotation assembly includes a rotary cylinder and a rotary arm, one end of the rotary arm is connected to the output end of the rotary cylinder and the other end is connected to the label suction head, and the rotary cylinder is mounted on a telescopic base.

[0015] The present invention, which has the above-mentioned features, has a rotary cylinder mounted on a telescopic base, whose output end drives a rotary arm to rotate circumferentially around a vertical axis. The label-absorbing die head is connected to the end of the rotary arm. When the label-absorbing die head absorbs a label from the labeling device, the rotary cylinder drives the rotary arm to rotate, so that the label-absorbing die head switches from the label-taking position to the labeling position. The overall space occupied is small, the rotation angle is accurate, and the stroke requirement of the horizontal moving component is reduced, thereby making the overall layout of the labeling device more compact.

[0016] A further feature of the present invention is that a positioning arm is connected to the telescopic base, and a positioning pin is provided on the positioning arm, the positioning pin being able to abut against the outer surface of the rotating arm.

[0017] The present invention, which has the above-mentioned features, has a positioning support arm fixed on a telescopic base. The positioning pin on the support arm abuts against the outer surface of the rotating arm when the rotating arm rotates to the position, thereby mechanically limiting the extreme rotation angle of the rotating arm and preventing the rotating arm from exceeding the preset position due to inertia or cylinder overshoot. This ensures the repeatability and positioning accuracy of the label suction head between the label picking position and the label application position, reduces unstable label adsorption or misalignment caused by angular deviation, and thus improves the consistency and reliability of labeling.

[0018] A further feature of the present invention is that the transfer device includes a transfer platform for moving the product, and the clamping assembly includes a clamping cylinder disposed on the side of the transfer platform away from the labeling device and an abutment bar disposed on the side close to the labeling device. The output end of the clamping cylinder extends horizontally toward the center of the transfer platform and is provided with a clamping block. The inner wall of the clamping block that is in contact with the product is arc-shaped, and the abutment bar extends along the conveying direction of the transfer platform.

[0019] The present invention, which has the above-mentioned features, has an arc-shaped surface of the clamping block that fits against the outer wall of the cylindrical product and forms a stable clamping space with the abutment strip, preventing the product from shifting during the labeling process and ensuring labeling accuracy.

[0020] A further feature of the present invention is that the baffle assembly includes two limiting cylinders symmetrically arranged on the side of the transfer table, the output end of the limiting cylinders extending horizontally toward the center of the transfer table, and a limiting plate is provided thereon.

[0021] The present invention, which has the above-mentioned features, has a baffle assembly that can automatically block the next product during the current product operation, preventing it from entering the labeling station during the current product labeling process and affecting normal operation.

[0022] A further feature of the present invention is that: the frame is provided with two sets of labeling devices arranged in parallel, the transfer device is provided with two sets of labeling devices, both sets of labeling devices and labeling devices are arranged along the product conveying direction, the transfer device is provided with two sets of clamping assemblies, and a second sensor for detecting the product position is provided on one side of each set of clamping assemblies.

[0023] The present invention, which has the above-mentioned features, enables dual-station labeling and improves production efficiency.

[0024] A further feature of this invention is that the labeling device includes a label holder, a label base plate, a label motor, an unwinding reel, a winding reel, a traction roller assembly, and a label peeling frame. The label base plate is mounted on the label holder and is equipped with guide rollers. The winding reel, the traction roller assembly, and the output end of the label motor are linked. The traction roller assembly is used to pull the label tape through the label peeling frame to the winding reel for winding the label tape. The label roll is placed on the unwinding reel. The label peeling frame is used to peel the label from the label base tape. The winding reel is used to move the label tape and wind up the label base tape.

[0025] The present invention, which has the above-mentioned features, drives the take-up reel and the traction roller group to rotate simultaneously through the transmission belt when the top motor is running. The traction roller group applies traction force to the label tape, so that the label tape is released from the unwinding reel and guided by the guide roller through the label peeling frame. The label peeling frame peels the label off the label base tape. The peeled base tape continues to be pulled by the traction roller group to the take-up reel for winding. This ensures that the moving speed of the label tape is stable and the tension is uniform during the label peeling process, avoiding label position deviation or label damage caused by loose or too tight base tape, thereby improving the success rate and consistency of label peeling.

[0026] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present invention.

[0028] Figure 2 This is a schematic diagram of the transfer device according to an embodiment of the present invention.

[0029] Figure 3This is a schematic diagram of the superscript device according to an embodiment of the present invention.

[0030] Figure 4 for Figure 3 A magnified view of part A in the middle.

[0031] Figure 5 This is a schematic diagram of the structure of the superscript base plate in an embodiment of the present invention.

[0032] Figure 6 This is a schematic diagram of the labeling device according to an embodiment of the present invention.

[0033] Figure 7 This is a structural schematic diagram illustrating the combination of the horizontal moving component, the labeling telescopic component, and the labeling rotating component in an embodiment of the present invention.

[0034] Figure 8 This is a cross-sectional view of the horizontal moving component according to an embodiment of the present invention. Detailed Implementation

[0035] This specific embodiment is merely an explanation of the present invention and is not intended to limit the invention. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

[0036] like Figure 1-8 The inner wall labeling machine shown includes a frame 5, on which a transfer device 1 for conveying products 4 and a labeling device 2 for conveying labels are provided. The transfer device 1 is equipped with a labeling device 3 for affixing labels to the inner wall of the products 4. The labeling device 2 is located on one side of the transfer device 1. The labeling device 2 peels the label off the label tape. The labeling device 3 absorbs the label and rotates it above the products 4. The labeling device 3 moves down, causing the label to move to the inner cavity of the middle of the products 4 and adhere to the inner wall of the products 4.

[0037] The transfer device 1 includes a transfer platform 11 for moving the product 4. The transfer platform 11 is provided with a first sensor 12 for detecting the position of the product 4, a baffle assembly 13 for blocking the next product 4, a second sensor 14 for detecting the position of the product 4, and a clamping assembly 15 for automatically positioning the product 4 along the conveying direction of the product 4. The clamping assembly 15 is located below the labeling device 3. The clamping assembly 15 includes a clamping cylinder 151 disposed on the side of the transfer platform 11 away from the labeling device 2 and an abutment bar 152 disposed on the side close to the labeling device 2. The output end of the clamping cylinder 151 extends horizontally toward the center of the transfer platform 11 and is provided with a clamping block 153. The inner wall of the clamping block 153 that is in contact with the product 4 is arc-shaped, and the abutment bar 152 extends along the conveying direction of the transfer platform 11.

[0038] The baffle assembly 13 includes two limit cylinders 131 symmetrically arranged on the side of the transfer table 11. The output end of the limit cylinder 131 extends horizontally toward the center of the transfer table 11 and is provided with a limit plate 132.

[0039] The labeling device 2 includes a label holder 21, a label base plate 22, a label motor 23, an unwinding reel 24, a winding reel 25, a traction roller group 26, and a label peeling frame 27. The label base plate 22 is connected to the label holder 21 via a mounting base. The label base plate 22 is mounted on the label base plate 22. The label base plate 22 is provided with guide rollers 221. The winding reel 25 and the traction roller group 26 are linked to the output end of the label motor 23 via a transmission belt. The traction roller group 26 is used to pull the label tape through the label peeling frame 27 to the winding reel 25 to wind the label tape. The label roll is placed on the unwinding reel 24. The label peeling frame 27 is used to peel the label from the label base tape. The winding reel 25 is used to drive the label tape to move and wind the label base tape.

[0040] The superscript base 21 includes a first adjusting base 211, a second adjusting base 212, and a third adjusting base 213. The first adjusting base 211 has a first adjusting slider 2111 and a first adjusting member 2112. The first adjusting slider 2111 is slidably engaged with the first adjusting base 211. One end of the first adjusting member 2112 is rotatably engaged with the first adjusting base 211, and the other end is threadedly connected to the first adjusting slider 2111. The second adjusting base 212 is linked with the first adjusting slider 2111. The second adjusting base 212 has a second adjusting slider 2121 and a second adjusting member 2122. The second adjusting slider 2121 is slidably engaged with the second adjusting base 213. The second adjusting member 2122 is rotatably engaged with the second adjusting seat 212 at one end and threadedly connected to the second adjusting slider 2121 at the other end. The second adjusting seat 212 and the second adjusting slider 2121 are linked together. The first adjusting slider 2111 and the second adjusting slider 2121 are arranged in a cross shape. The third adjusting seat 213 is linked with the second adjusting slider 2121. The third adjusting seat 213 is provided with a third adjusting slider 2131 and a third adjusting member 2132 at one end opposite to the second adjusting slider 2121. The third adjusting slider 2131 and the third adjusting member 2132 are threadedly connected. The upper base plate 22 is linked with the third adjusting slider 2131.

[0041] The label base plate 22 is provided with a pressure cylinder 28 above the label peeling frame 27 and a tension cylinder 29 on the side. The body of the pressure cylinder 28 is fixedly connected to the label base plate 22 and the output end is connected to the pressure plate 281. The body of the tension cylinder 29 is fixedly connected to the label base plate 22 and the output end is provided with a tension seat 291. The tension seat 291 is provided with a tension roller 292, and the tension roller 292 and the tension seat 291 rotate in cooperation.

[0042] The labeling device 3 includes a labeling frame 31, a horizontal moving component 32, a labeling telescopic component 33, a labeling rotating component 34, and a label suction head 35. The labeling frame 31 is located above the transfer device 1. The horizontal moving component 32 is connected above the labeling frame 31. The labeling telescopic component 33 is linked with the horizontal moving component 32. The labeling rotating component 34 is linked with the output end of the labeling telescopic component 33. The horizontal moving component 32 drives the labeling telescopic component 33 to move horizontally. The labeling telescopic component 33 drives the labeling rotating component 34 to extend into or remove from the product. The labeling rotating component 34 drives the label suction head 35 to rotate circumferentially, thereby adsorbing the peeled label.

[0043] The horizontal moving component 32 includes a fixed base 321, a connecting screw 322, and a moving base 323. The connecting screw 322 is disposed inside the fixed base 321. The moving base 323 is threadedly connected to the connecting screw 322 and slides in cooperation with the fixed base 321. The moving base 323 is connected to a mounting bracket 324. The labeling telescopic component 33 is disposed on the mounting bracket 324.

[0044] The labeling telescopic assembly 33 includes a telescopic cylinder 331 and a telescopic seat 332. A guide rail 325 is provided on the mounting bracket 324. The telescopic seat 332 slides with the guide rail 325 through the guide slider 333. The body of the telescopic cylinder 331 is mounted on the mounting bracket 324 and its output end is connected to the telescopic seat 332. The labeling rotation assembly 34 is linked with the telescopic seat 332.

[0045] The labeling rotation assembly 34 includes a rotary cylinder 341 and a rotary arm 342. One end of the rotary arm 342 is connected to the output end of the rotary cylinder 341, and the other end is connected to the label suction head 35. The rotary cylinder 341 is mounted on the telescopic base 332.

[0046] The telescopic base 332 is connected to a positioning support arm 36, and the positioning support arm 36 is provided with a positioning pin 37, which can abut against the outer surface of the rotating arm 342.

[0047] The frame 5 is equipped with two sets of labeling devices 2 arranged in parallel, and the transfer device 1 is equipped with two sets of labeling devices 3. Both sets of labeling devices 3 and labeling devices 2 are arranged along the conveying direction of product 4. The transfer device 1 is equipped with two sets of clamping components 15, and each set of clamping components 15 is equipped with a second sensor 14 for detecting the position of product 4 on one side.

[0048] In the actual production process, the transfer station 11 transports the products to the labeling station.

[0049] The clamping cylinder 151 pushes the clamping block 153 to fit against the outer periphery of the product, and the abutment strip 152 fixes the product in place; the limiting cylinder 131 pushes the limiting plate 132 to block and limit the next product.

[0050] The labeling device 2 begins operation: the labeling motor 23 operates, simultaneously driving the take-up reel 25 and the traction roller assembly 26 to rotate. The traction roller assembly 26 pulls the label tape out from the unwind reel 24 and guides it through the label peeling frame 27 via the guide roller 221. The pressure cylinder 28 drives the pressure plate 281 to press the label tape, and the tension cylinder 29 moves the tension roller 292 via the tension seat 291 to adjust the label tape tension. As the label tape passes through the label peeling frame 27, the label is peeled off from the label base tape, which continues to be pulled by the traction roller assembly 26 to the take-up reel 25 for winding.

[0051] The labeling device 3 operates simultaneously: the connecting screw 322 of the horizontal moving component 32 rotates, driving the moving seat 323 to slide horizontally along the fixed seat 321. The moving seat 323 drives the labeling telescopic component 33 to move to the label taking position through the mounting bracket 324, and the label suction head 35 faces the labeling device 2.

[0052] After the label suction head 35 absorbs and peels off the label, the connecting screw 322 of the horizontal moving component 32 rotates in the opposite direction, driving the labeling telescopic component 33 to move towards the product side. At the same time, the rotary cylinder 341 operates, and its output end drives the rotary arm 342 to rotate circumferentially around the central axis of the rotary cylinder output end. The label suction head 35 rotates from the label picking position to the labeling position with the rotary arm 342. The outer surface of the rotary arm 342 abuts against the positioning pin 37 on the positioning support arm 36 to avoid excessive rotation.

[0053] Subsequently, the horizontal moving component 32 drives the labeling telescopic component 33 to move directly above the product. The telescopic cylinder 331 extends, and its output end pushes the telescopic seat 332 to move vertically downward along the guide rail 325. The telescopic seat 332 drives the labeling rotating component 34 to descend, causing the label suction head 35 on the rotating arm 36 to extend into the inner cavity of the product. Then, the horizontal moving component 32 continues to drive the label suction head 35 to move until the label contacts and adheres to the inner wall of the product.

[0054] After labeling is completed, the connecting screw 322 rotates, separating the label suction head 35 from the inner wall of the product. The telescopic cylinder 331 retracts, moving the label suction head 35 out of the product's inner cavity. The rotary cylinder 341 rotates in the opposite direction, resetting the label suction head 35 to the label-taking position. The clamping cylinder 151 and clamping block 153 reset, releasing the labeled product. The limiting cylinder 131 and limiting plate 132 reset, and the next product enters the labeling station, repeating the above actions.

Claims

1. An inner wall labeling machine, characterized in that: The device includes a frame on which a product conveying transfer device and a labeling device are mounted. The transfer device is equipped with a labeling device that affixes the label to the inner wall of the product. The labeling device is located on one side of the transfer device. The labeling device peels the label off the label tape. The labeling device picks up the label and rotates it above the product. The labeling device moves downward, causing the label to move to the inner cavity of the product and adhere to the inner wall of the product. The transfer device is equipped with, in sequence along the product conveying direction, a first sensor for detecting the product position, a baffle assembly for blocking the next product, a second sensor for detecting the product position, and a clamping assembly for automatically positioning the product. The clamping assembly is located below the labeling device.

2. The inner wall labeling machine according to claim 1, characterized in that: The labeling device includes a labeling frame, a horizontal moving component, a labeling telescopic component, a labeling rotating component, and a label suction head. The labeling frame is mounted above the transfer device. The horizontal moving component is connected above the labeling frame. The labeling telescopic component is linked to the horizontal moving component. The labeling rotating component is linked to the output end of the labeling telescopic component. The horizontal moving component drives the labeling head to move horizontally. The labeling rotating component drives the label suction head to rotate. The labeling telescopic component drives the labeling head to extend into or move out of the product cavity.

3. The inner wall labeling machine according to claim 2, characterized in that: The horizontal moving component includes a fixed base, a connecting screw, and a moving base. The connecting screw is disposed inside the fixed base. The moving base is threadedly connected to the connecting screw and slidably engaged with the fixed base. The moving base is connected to a mounting bracket. The labeling telescopic component is disposed on the mounting bracket.

4. The inner wall labeling machine according to claim 3, characterized in that: The labeling telescopic assembly includes a telescopic cylinder and a telescopic seat. The mounting bracket is provided with a guide rail. The telescopic seat slides with the guide rail via a guide slider. The body of the telescopic cylinder is mounted on the mounting bracket and its output end is connected to the telescopic seat. The labeling rotation assembly is linked with the telescopic seat.

5. The inner wall labeling machine according to claim 4, characterized in that: The labeling rotation assembly includes a rotary cylinder and a rotary arm. One end of the rotary arm is connected to the output end of the rotary cylinder, and the other end is connected to the label suction head. The rotary cylinder is mounted on a telescopic base.

6. The inner wall labeling machine according to claim 5, characterized in that: The telescopic base is connected to a positioning arm, and the positioning arm is provided with a positioning pin, which can abut against the outer surface of the rotating arm.

7. The inner wall labeling machine according to claim 1, characterized in that: The transfer device includes a transfer platform for moving products. The clamping assembly includes a clamping cylinder disposed on the side of the transfer platform away from the labeling device and an abutment bar disposed on the side close to the labeling device. The output end of the clamping cylinder extends horizontally toward the center of the transfer platform and is provided with a clamping block. The inner wall of the clamping block that is in contact with the product is arc-shaped. The abutment bar extends along the conveying direction of the transfer platform.

8. An inner wall labeling machine according to claim 7, characterized in that: The baffle assembly includes two symmetrically arranged limit cylinders on the side of the transfer table. The output end of the limit cylinder extends horizontally toward the center of the transfer table and is provided with a limit plate.

9. An inner wall labeling machine according to any one of claims 1-8, characterized in that: The frame is equipped with two sets of labeling devices arranged in parallel, and the transfer device is equipped with two sets of labeling devices. Both sets of labeling devices and labeling devices are arranged along the product conveying direction. The transfer device is equipped with two sets of clamping assemblies, and a second sensor for detecting the product position is provided on one side of each set of clamping assemblies.

10. An inner wall labeling machine according to claim 1, characterized in that: The labeling device includes a label holder, a label base plate, a label motor, an unwinding reel, a winding reel, a traction roller assembly, and a label peeling frame. The label base plate is mounted on the label holder and is equipped with guide rollers. The winding reel, the traction roller assembly, and the output end of the label motor are linked. The traction roller assembly is used to pull the label tape through the label peeling frame to the winding reel for winding the label tape. The label roll is placed on the unwinding reel. The label peeling frame is used to peel the label from the label base tape. The winding reel is used to move the label tape and wind up the label base tape.