Label cleaning method and device

Abstract

The invention discloses a label cleaning method and device.The label cleaning method comprises the steps that a cylindrical workpiece is provided and fixed to a rotary clamping mechanism, and the rotary clamping mechanism is configured to be capable of driving the cylindrical workpiece to rotate in the circumferential direction; the heating unit is controlled to move to a preset position, so that the heating unit directly faces the label on the surface of the cylindrical workpiece; the rotary clamping mechanism is started to drive the cylindrical workpiece to rotate for a first preset duration, and the heating unit is started to heat for a second preset duration; after the heating unit works for a second preset duration, the scraping mechanism is started to abut against the surface of the cylindrical workpiece at constant pressure to scrape the label; and after the rotary clamping mechanism works for a first preset duration, an environment-friendly solvent is sprayed to the residual and leaked colloid on the surface of the cylindrical workpiece, and the environment-friendly solvent and the residual and leaked colloid are erased together. According to the method, manual intervention of heating and scraping is not needed in the whole process, the consistency of the cleaning effect is good, the smoothness of the surface of the workpiece is effectively protected, and automatic and high-quality cleaning of the labels on the surface of the cylindrical workpiece is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of label processing, and in particular to a label processing method and device. BACKGROUND

[0002] The surface of a cylindrical workpiece (such as a polyacrylonitrile precursor cylinder) is often attached with a label containing product information, specifications or a bar code.

[0003] Polyacrylonitrile precursor cylinders, as key consumables for carbon fiber production, need to be recycled due to their high cost. Before being recycled, refurbished or entering the next processing procedure, the labels on the surface of the cylinder need to be completely removed The cleaning method in the related art is inefficient, and the workpiece surface is easily damaged due to uneven operation, resulting in poor cleaning quality. SUMMARY

[0004] To overcome the problems in the related art, the present application provides a label processing method and device.

[0005] According to an embodiment of the present application, a label cleaning method is provided for cleaning a label on the surface of a cylindrical workpiece, comprising: providing a cylindrical workpiece and fixing the cylindrical workpiece on a rotary clamping mechanism, the rotary clamping mechanism being configured to drive the cylindrical workpiece to rotate in a circumferential direction; controlling a heating unit to move to a preset position so that the heating unit is directly opposite the label on the surface of the cylindrical workpiece; starting the rotary clamping mechanism to drive the cylindrical workpiece to rotate for a first preset time period, and starting the heating unit to heat for a second preset time period, the first preset time period being greater than the second preset time period; after the heating unit works for the second preset time period, starting a scraping mechanism to scrape the label off the surface of the cylindrical workpiece at a constant pressure; after the rotary clamping mechanism works for the first preset time period, spraying an environmentally friendly solvent to the residual glue on the surface of the cylindrical workpiece and wiping it off.

[0006] In some embodiments, the cylindrical workpiece is provided and fixed on the rotary clamping mechanism, comprising: controlling the rotary clamping mechanism to rotate by a preset angle so that the label on the surface of the cylindrical element faces a pattern sensor; controlling the rotary clamping mechanism to rotate at least one full circle, and controlling the image sensor to acquire a size parameter of the label; wherein the size parameter includes a central angle corresponding to the label and / or a size of the label along the circumferential direction of the cylindrical workpiece.

[0007] In some embodiments, the starting the rotating clamping mechanism to drive the cylindrical workpiece to rotate for a first preset time period and starting the heating unit to heat for a second preset time period comprises: According to the size parameters of the label, the rotating clamping mechanism is controlled to rotate at a first angular velocity for a first angle and at a second angular velocity for a second angle when rotating one full circle within the second preset time period after being started, and the sum of the first angle and the second angle is 360°. The first angular velocity is greater than the second angular velocity; and / or the second angle is the same as the corresponding central angle of the label.

[0008] In some embodiments, the starting the rotating clamping mechanism to drive the cylindrical workpiece to rotate for a first preset time period and starting the heating unit to heat for a second preset time period further comprises: According to the size parameters of the label and the rotating speed of the rotating clamping mechanism, the heating unit is controlled to adjust the distance from the surface of the cylindrical workpiece and / or the heating temperature of the heating unit.

[0009] In some embodiments, when the rotating clamping mechanism rotates at a first angular velocity, the heating unit heats at a first preset temperature and maintains a first preset distance from the surface of the cylindrical workpiece; When the rotating clamping mechanism rotates at a second angular velocity, the heating unit heats at a second preset temperature and maintains a second preset distance from the surface of the cylindrical workpiece; The first preset temperature is less than the second preset temperature; and / or the first preset distance is less than the second preset distance.

[0010] In some embodiments, the first preset temperature is 40-60°C, and the second preset temperature is 60-80°C; The first preset distance is 1-5 cm, and the second preset distance is 5-10 cm.

[0011] In some embodiments, the second preset time period is 5-30 seconds.

[0012] In some embodiments, the environmentally friendly solvent includes at least one or a physical mixture of two of industrial alcohol and low-toxicity environmentally friendly adhesive removers; Each spraying amount of the environmentally friendly solvent is 1 ml.

[0013] In a second aspect, the present application provides a label cleaning device for performing the label cleaning method of the first aspect, comprising: a rack; a rotating clamping mechanism mounted on the rack for fixing and driving the cylindrical workpiece to rotate along its circumference; a heating unit disposed on the rack and configured to be movable to a preset position opposite to the label on the surface of the cylindrical workpiece; a scraping mechanism disposed on the rack and configured to scrape the surface of the cylindrical workpiece with constant pressure; a control system electrically connected with the rotating clamping mechanism, the heating unit and the scraping mechanism, the control system being configured to control the mechanisms to work cooperatively according to the cleaning method of any one of claims 1-8.

[0014] In some embodiments, further comprising an image sensor mounted on the rack and connected with the control system, the image sensor being used to acquire the size parameter of the label; the heating unit is a hot air gun, an infrared heater or a laser heater; the scraping mechanism has a scraper with a Mohs hardness less than that of the cylindrical workpiece.

[0015] The technical scheme provided by the embodiments of the present application can have the following beneficial effects: the entire process does not need manual intervention for heating and scraping, the cleaning effect is consistent, the surface smoothness of the workpiece is effectively protected, and the automatic and high-quality cleaning of the label on the surface of the cylindrical workpiece is realized.

[0016] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present application. BRIEF DESCRIPTION OF DRAWINGS

[0017] The accompanying drawings incorporated in the specification and constituting a part hereof illustrate embodiments consistent with the present application and together with the specification serve to explain the principles of the present application.

[0018] Figure 1 a flow chart of a label processing method provided by an embodiment of the present application; Figure 2 a schematic diagram of a label processing device provided by an embodiment of the present application; Figure 3 a partial schematic diagram of a label processing device provided by an embodiment of the present application; Figure 4 a partial schematic diagram of a label processing device provided by an embodiment of the present application.

[0019] Reference Signs: 10, rack; 11, first support; 12, second support; 20, rotating clamping mechanism; 21, servo motor; 22, clamping structure; 30, heating unit; 40, image sensor; 50. A cylindrical workpiece. DETAILED DESCRIPTION

[0020] The exemplary embodiments will be described in detail herein with reference to the attached drawings. In the following description, like reference numerals refer to like elements, unless the context clearly dictates otherwise. The following description of exemplary embodiments is not intended to represent all embodiments in accordance with the present application. Rather, they are merely examples in accordance with some aspects of the present application as detailed in the appended claims.

[0021] To solve the problems in the related art, the present application provides a label cleaning method and device. The label cleaning method comprises the following steps: providing a cylindrical workpiece and fixing the cylindrical workpiece on a rotary clamping mechanism, the rotary clamping mechanism is configured to drive the cylindrical workpiece to rotate in a circumferential direction; controlling a heating unit to move to a preset position, so that the heating unit is opposite to a label on the surface of the cylindrical workpiece; starting the rotary clamping mechanism to drive the cylindrical workpiece to rotate for a first preset time, and starting the heating unit to heat for a second preset time, the first preset time is greater than the second preset time; after the heating unit works for the second preset time, starting a scraping mechanism to scrape the label on the surface of the cylindrical workpiece at a constant pressure; after the rotary clamping mechanism works for the first preset time, spraying an environmentally friendly solvent to the residual glue on the surface of the cylindrical workpiece and wiping it away. The cleaning method provided in the embodiment does not need manual intervention for heating and scraping in the whole process, has good cleaning consistency, effectively protects the surface finish of the workpiece, and realizes automatic and high-quality cleaning of the label on the surface of the cylindrical workpiece.

[0022] According to an exemplary embodiment of the present application, the present embodiment provides a label cleaning method. As shown in Figure 1 The cleaning method comprises the following steps: Step S110, providing a cylindrical workpiece and fixing the cylindrical workpiece on a rotary clamping mechanism, the rotary clamping mechanism is configured to drive the cylindrical workpiece to rotate in a circumferential direction.

[0023] In this step, refer to Figures 2 to 4, the worker can place the labeled cylindrical workpiece 50 on the rotary clamping mechanism 20 and clamp it. The rotary clamping mechanism 20 includes two clamping structures 22 arranged oppositely, and the distance between the two clamping structures 22 is adjustable. The clamping structure 22 is in the shape of a circular truncated cone or a three-jaw chuck, the diameter of the smallest end face of the circular truncated cone is smaller than the inner diameter of the cylindrical workpiece 50, and the diameter of the largest end face of the circular truncated cone is larger than the inner diameter of the cylindrical workpiece 50. During assembly, the cylindrical workpiece 50 is aligned with the clamping structure 22, and the two clamping structures 22 are controlled to move closer to each other to clamp and fix the cylindrical workpiece 50. One of the two clamping structures 20 can be connected to a driving motor (such as a servo motor 21), and the other can be connected to a rotating shaft as a driven structure.

[0024] In some embodiments, after the cylindrical workpiece 50 is fixed on the rotary clamping mechanism 20, the label cleaning device can identify the shape of the label and the position of the label on the surface of the cylindrical workpiece 50 through the image sensor 40, and send the parameters to the control system. The control system controls the rotation of the clamping mechanism 20 according to the above-mentioned parameters. This arrangement can ensure that different batches of cylindrical workpieces 50 can accept the same cleaning process and ensure consistent cleaning effect. After the cylindrical workpiece 50 is fixed, the control system can control the clamping mechanism 20 to drive the cylindrical workpiece 50 to rotate at a constant speed for one revolution, and in this process, the image sensor 40 continuously collects images. The control system identifies the outline of the label (i.e., generates size parameters) through image processing algorithms, and calculates the corresponding central angle in the circumferential direction of the cylinder and the size (arc length size) of the label in the circumferential direction of the cylindrical workpiece 50. In the subsequent cleaning process, the control system can control the rotary clamping mechanism 20 to rotate according to the size parameters of the label, and control the heating unit 30 to adaptively heat, which can improve the heating effect while avoiding damage to the main body of the cylindrical workpiece 50. Details are described below.

[0025] Step S120, control the heating unit to move to a preset position, so that the heating unit is opposite to the label on the surface of the cylindrical workpiece.

[0026] In this step, during the feeding process, in order to avoid interference of the heating unit 30 causing inconvenience in feeding or causing the heating unit 30 to be physically impacted and damaged, the heating unit 30 is usually moved to a position far away from the cylindrical workpiece 50.

[0027] After the feeding is completed, the heating unit 30 can be moved to a preset position so that the heating unit 30 is opposite to the label on the surface of the cylindrical workpiece 50. In one example, the hot air gun of the heating unit 30 can be moved to a preset position where the air outlet is opposite to the center of the label and is 1 cm to 5 cm away from the surface of the cylindrical workpiece 50.

[0028] Step S130: Start the rotary clamping mechanism to drive the cylindrical workpiece to rotate for a first preset time, and start the heating unit to heat for a second preset time. The first preset time is longer than the second preset time.

[0029] In this step, the control system can plan the movement of the heating stage based on the identified label center angle.

[0030] In some embodiments, see Figure 2 Simultaneously, the rotary clamping mechanism 20 and the heating unit 30 are activated. The total rotation time of the rotary clamping mechanism 20 (first preset duration) is set to 40 seconds, and the concentrated heating time of the heating unit 30 (second preset duration) is set to 15 seconds. During the initial 15-second heating period, the control system controls the cylindrical workpiece 50 to rotate at a specific speed mode: within each 360° rotation cycle, when the label area passes the heating unit 30, the cylindrical workpiece 50 rotates at a slower second angular velocity; when the non-label area passes the heating unit 30, the cylindrical workpiece 50 rotates at a faster first angular velocity. This ensures that the label area is exposed to hot air for a much longer time than the non-label area, achieving concentrated and uniform application of heat to the label area, ensuring that the label adhesive is fully softened while avoiding unnecessary heating of other areas of the workpiece.

[0031] In other embodiments, the control system can dynamically adjust the heating parameters of the heating unit 330 according to the rotational speed of the rotary clamping mechanism 20: when the cylindrical workpiece 50 rotates rapidly at a first angular velocity, causing the non-label area to pass quickly through the heating unit 30, the heating temperature of the heating unit 30 can be controlled to be maintained at a first preset temperature (40°C to 60°C, for example, 50°C), and the slide can be controlled to slightly retract the hot air gun ( Figure 2 (reverse of the x-direction shown) to a first preset distance from the surface (5 cm to 10 cm, for example, 8 cm); when the cylindrical workpiece 50 rotates slowly at a second angular velocity, causing the label area to slowly pass through the heating unit 30, the heating temperature of the heating unit 30 can be controlled to rise to a second preset temperature (60°C to 80°C, for example, 70°C), and the heating unit 30 is brought closer to ( Figure 2 The surface of the cylindrical workpiece 50 (in the x direction shown) is spaced with a second preset distance (1 cm to 5 cm, for example, 3 cm). This combination of "high speed, low temperature, long distance" and "low speed, high temperature, short distance" further optimizes thermal efficiency and protects the cylindrical workpiece 50.

[0032] Step S140: After the heating unit has been working for the second preset time, the scraping mechanism is started to scrape the label off the surface of the cylindrical workpiece with constant pressure.

[0033] In this step, after the second preset time length, the control system turns off the heating unit 30, but the rotating clamping mechanism 20 continues to drive the cylindrical workpiece 50 to rotate at the original speed mode (or to rotate at a constant speed).

[0034] At the same time, the control system immediately starts the scraping mechanism, and the cylinder and other units in the scraping mechanism control the scraper to approach the surface of the cylindrical workpiece 50 and abut against the surface at a constant pressure. As the cylindrical workpiece 50 continues to rotate, the heated and softened label paper and its adhesive are easily scraped off the surface by the scraper. The scraping operation continues until the working time of the rotating clamping mechanism 20 reaches the first preset time length.

[0035] Step S150, after the rotating clamping mechanism works for the first preset time length, the remaining adhesive on the surface of the cylindrical workpiece is sprayed with an environmentally friendly solvent and wiped off.

[0036] In this step, after the rotating clamping mechanism 20 stops rotating, the control system controls the spraying unit to move above the cylindrical workpiece. For the adhesive that may remain after scraping, the spraying unit can accurately spray 1 ml of environmentally friendly solvent (at least one of industrial alcohol and low-toxicity environmentally friendly adhesive remover is used in this embodiment, or a physical mixture of the two, of course, the total amount of the two solvents can also be sprayed in sequence. When spraying the two solvents in sequence, the total amount of the two solvents should be 1 ml).

[0037] After spraying, the wiping head in the scraping mechanism wipes the sprayed area to completely dissolve and remove the remaining adhesive.

[0038] Then, the two clamping structures 22 in the rotating clamping mechanism 20 can be controlled to move away from each other to unlock the cylindrical workpiece 50, and the worker can take out the cleaned cylindrical workpiece 50, and thus the cleaning operation for a single cylindrical workpiece 50 is completed.

[0039] The cleaning method provided by the embodiment does not require manual intervention for heating and scraping, has good cleaning consistency, effectively protects the surface finish of the workpiece, and realizes automatic and high-quality cleaning of the label on the surface of the cylindrical workpiece.

[0040] According to the example embodiment of the present application, as Figure 2 shown, the embodiment provides a label cleaning device, as Figure 2 shown, the label cleaning device includes a rack 10, a rotating clamping mechanism 20, a heating unit 30, a scraping mechanism, an image sensor 40, a spraying unit, and a control system.

[0041] As Figure 2As shown, the rack 10 comprises a first support 11 and a second support 12 connected by sliding, and part of the structure in the label cleaning device (for example, the heating unit 30 and the image sensor 40) is installed on the second support 12, and the other part of the structure can be directly installed on the first support 11, and the second support 12 can drive the structure installed thereon to slide relative to the first support 11 as a whole, so as to ensure that the structures on the second support 12 can still be in the preset relative position in the preset direction after adjustment. Exemplarily, the heating unit 30 and the image sensor 40 are both installed on the second support 12, and are arranged on the two sides of the cylindrical workpiece along the x direction and are kept facing each other, so that the heating unit 30 and the image sensor 40 are kept facing each other, and the heating unit 30 can be controlled to heat the label region detected by the image sensor 40, avoiding repeated and multiple adjustments of the device. Figure 2 As shown, the heating unit 30 and the image sensor are arranged on the two sides of the cylindrical workpiece along the x direction and are kept facing each other, so that the heating unit 30 and the image sensor 40 are kept facing each other, and the heating unit 30 can be controlled to heat the label region detected by the image sensor 40, avoiding repeated and multiple adjustments of the device.

[0042] As shown in Figure 2 and Figure 3 The rotary clamping mechanism 20 is installed on the rack 10. The rotary clamping mechanism 20 comprises a servo motor 21 and a clamping structure 22 installed on the output shaft of the servo motor 21, and the clamping structure 22 is driven by the servo motor 21 to clamp and drive the cylindrical workpiece to rotate around the central axis. The rotation angle and angular velocity of the clamping structure 22 can be accurately controlled.

[0043] As shown in Figure 2 and Figure 4 The heating unit 30 comprises a temperature-adjustable hot air gun, an infrared heater or a laser heater. The heating unit 30 can be installed on the rack 10 through a two-dimensional moving slide, and can move forward and backward under the control of the control system to approach or move away from the cylindrical workpiece, so as to adjust the relative distance and position of the air outlet of the heating unit 30 and the label on the surface of the cylindrical workpiece.

[0044] The scraping mechanism comprises a pneumatic or electric actuator as a driving unit, for example, a pneumatic cylinder or an electric push rod. The scraping knife is installed at the end of the output shaft of the driving unit. A pressure sensor can be arranged between the scraping knife and the output shaft, and the pressure sensor can keep the scraping knife in constant contact pressure (for example, 5N) with the surface of the cylindrical workpiece. The Mohs hardness of the scraping knife is less than that of the cylindrical workpiece, and the material of the scraping knife can be plastic, which will not scratch the bottle body while effectively scraping the label. In some embodiments, the scraping mechanism is further provided with a wiping head, which is used to wipe the surface of the cylindrical workpiece after the environmental protection solvent is sprayed by the spraying unit.

[0045] As shown in Figure 2 and Figure 4As shown, the image sensor 40 is fixedly mounted on the frame 10 with its optical axis direction aligned with the clamping area. In one example, the image sensor 40 can be an industrial camera.

[0046] The spraying unit includes a liquid tank storing the environment-friendly solvent, a metering pump and a nozzle.

[0047] The control system is electrically connected with all the above structures, and is responsible for the logic and motion control of the whole cleaning process. In one example, the control system can be a Programmable Logic Controller (PLC).

[0048] Other embodiments of the application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. It is intended that the specification and examples be considered as exemplary only, with the true scope and spirit of the application being indicated by the following claims.

[0049] It should be understood that the application is not limited to the precise construction that has been described above and shown in the accompanying drawings, and that various modifications and changes can be made by those skilled in the art without departing from the scope of the application. The scope of the application is limited only by the appended claims.

Claims

1. A label cleaning method characterized by, A label for cleaning the surface of a cylindrical workpiece, comprising: providing a cylindrical workpiece and fixing the cylindrical workpiece on a rotating clamping mechanism configured to drive the cylindrical workpiece to rotate in a circumferential direction; controlling a heating unit to move to a preset position, so that the heating unit is opposite to the label on the surface of the cylindrical workpiece; starting the rotating clamping mechanism to drive the cylindrical workpiece to rotate for a first preset time period, and starting the heating unit to heat for a second preset time period, the first preset time period being greater than the second preset time period; after the heating unit works for the second preset time period, starting a scraping mechanism to scrape the label on the surface of the cylindrical workpiece with constant pressure; after the rotating clamping mechanism works for the first preset time period, spraying an environmentally friendly solvent to the residual glue on the surface of the cylindrical workpiece and wiping it off.

2. The label cleaning method according to claim 1, characterized by, providing a cylindrical workpiece and fixing the cylindrical workpiece on a rotating clamping mechanism, comprising: controlling the rotating clamping mechanism to rotate at least one full circle, and controlling the image sensor to acquire size parameters of the label; wherein the size parameters include a corresponding central angle of the label and / or a size of the label in the circumferential direction of the cylindrical workpiece.

3. The label cleaning method according to claim 2, characterized by, the starting the rotating clamping mechanism to drive the cylindrical workpiece to rotate for a first preset time period, and starting the heating unit to heat for a second preset time period, comprising: according to the size parameters of the label, controlling the rotating clamping mechanism to rotate at a first angular velocity for a first angle and at a second angular velocity for a second angle in each full circle within the second preset time period after starting, the sum of the first angle and the second angle being 360°; wherein the first angular velocity is greater than the second angular velocity; and / or, the second angle is the same as the corresponding central angle of the label.

4. The label cleaning method according to claim 2, characterized by, the starting the rotating clamping mechanism to drive the cylindrical workpiece to rotate for a first preset time period, and starting the heating unit to heat for a second preset time period, further comprising: according to the size parameters of the label and the rotation angular velocity of the rotating clamping mechanism, controlling the heating unit to adjust the distance from the surface of the cylindrical workpiece and / or the heating temperature of the heating unit.

5. The label cleaning method according to claim 4, wherein, when the rotating clamping mechanism rotates at the first angular velocity, the heating unit heats at a first preset temperature and maintains a first preset distance from the surface of the cylindrical workpiece; when the rotating clamping mechanism rotates at the second angular velocity, the heating unit heats at a second preset temperature and maintains a second preset distance from the surface of the cylindrical workpiece; wherein the first preset temperature is less than the second preset temperature; and / or, the first preset distance is less than the second preset distance.

6. The label cleaning method according to claim 5, wherein, the first preset temperature is 40℃ to 60℃, and the second preset temperature is 60℃ to 80℃; the first preset distance is 1 cm to 5 cm, and the second preset distance is 5 cm to 10 cm.

7. The label cleaning method according to claim 1, wherein the second preset time period is 5 seconds to 30 seconds.

8. The label cleaning method according to claim 1, characterized by, the environmentally friendly solvent includes at least one of industrial alcohol and low-toxicity environmentally friendly glue remover, or a physical mixture of both; the spraying amount of the environmentally friendly solvent is 1 ml each time.

9. A label cleaning apparatus characterized by, A label cleaning method as claimed in any one of claims 1-8 is performed, comprising: a frame; a rotating clamping mechanism mounted on the frame for fixing and driving the cylindrical workpiece to rotate along its circumference; a heating unit arranged on the frame and configured to be movable to a preset position opposite the label on the surface of the cylindrical workpiece; a scraping mechanism arranged on the frame and configured to scrape the surface of the cylindrical workpiece with constant pressure; a control system electrically connected with the rotating clamping mechanism, the heating unit and the scraping mechanism, and configured to control the mechanisms to work cooperatively according to the cleaning method of any one of claims 1-8.

10. The label cleaning apparatus of claim 9, wherein, Further comprising an image sensor mounted on the frame and connected with the control system, the image sensor being used to acquire size parameters of the label; the heating unit is a hot air gun, an infrared heater or a laser heater; the scraping mechanism has a scraper with a Mohs hardness less than that of the cylindrical workpiece.

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