Automatic cleaning machine and method for laser etching characters

Abstract

The invention discloses an automatic cleaning machine and method for laser etching characters, relates to the technical field of mobile phone rear cover production, and aims to solve the problem that the laser etching mobile phone rear cover PU leather characters need to be cleaned due to the fact that the characters become white after being burnt. According to the equipment, a cam divider drives a turntable to rotate intermittently, and a plurality of jigs are arranged on the turntable to store mobile phone rear cover PU leather. A loading and unloading station, a cleaning agent smearing device, a first wiping device, a second wiping device, an X-axis cleaning device and a Y-axis cleaning device are sequentially arranged around the rotating disc. The rotary table drives the jigs to sequentially pass through all the stations, and cleaning automation is achieved. The defects that traditional manual cleaning is low in efficiency, unstable in quality and high in cost are overcome, the cleaning quality and efficiency can be stably improved, the production cost is reduced, the large-scale production requirement is met, and the product appearance quality is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of mobile phone back cover production, and in particular to an automatic cleaning machine and method for laser engraved characters. Background Art

[0002] In the production process of laser engraving characters on PU leather back covers of mobile phones, although the laser engraving process can accurately engrave the required characters, it will inevitably cause the leather to burn, making the characters appear white, seriously affecting the appearance and quality of the product. Therefore, it is very necessary to clean the laser engraved characters.

[0003] Traditional cleaning methods rely primarily on manual operation. First, workers manually spray Belle Pearl. This process is difficult to precisely control the spray volume and spray range, which can easily result in uneven spraying. This not only wastes detergent but can also cause other problems due to overspray. The characters are then wiped with a dust-free cloth. However, it's difficult to maintain consistent wiping force and direction, resulting in varying wiping results. Minor stains may not be completely removed, and the wiping efficiency is low, making it difficult to meet the needs of large-scale production. Finally, when using a brush to clean the characters, due to the instability of manual operation, the brush's cleaning force and frequency cannot be precisely controlled, potentially leading to excessive wear on the character surface or incomplete cleaning.

[0004] Furthermore, manual operation presents numerous uncertainties, making it difficult to guarantee a dust-free environment. During the wiping and cleaning process, impurities such as dust can easily reattach to the surface of the characters, affecting the quality of cleaning. Furthermore, labor costs are high, and with changes in the labor market, companies are facing increasing pressure on labor costs.

[0005] Therefore, we propose an automatic laser engraving character cleaning machine that can automatically complete the spraying of Belle Pearl, automatic wiping of laser engraved characters with a dust-free cloth, and automatic cleaning of characters with a brush. Summary of the Invention

[0006] In order to solve the technical problems existing in the background technology, the present invention provides an automatic cleaning machine and method for laser engraved characters.

[0007] In the first aspect, the present invention proposes an automatic cleaning machine for laser engraved characters, comprising a turntable driven by a cam divider to rotate intermittently, a detergent applying device, a first wiping device, a second wiping device, an X-axis cleaning device, and a Y-axis cleaning device are sequentially arranged around the turntable, a plurality of jigs for storing PU leather of the back cover of a mobile phone are fixed on the upper part of the turntable, a loading and unloading station is arranged between the detergent applying device and the Y-axis cleaning device, the turntable drives the jig to rotate synchronously and pass through each station in turn to complete the cleaning operation.

[0008] Furthermore, the cleaning agent smearing device includes a first bracket, a lifting drive cylinder is installed on the top of the first bracket and is slidably connected to the main frame, and the lifting drive cylinder drives the main frame to rise and fall; a downward drive cylinder is installed inside the main frame, and the telescopic end of the downward drive cylinder is connected to the sponge.

[0009] Furthermore, the end of the main frame is connected to the sub-frame, a feeding drive cylinder is installed on the top of the sub-frame, a feeding rack is installed on the telescopic end of the feeding drive cylinder, a detergent tank is installed inside the feeding rack, and the detergent tank discharge pipe corresponds to the sponge.

[0010] Furthermore, the second wiping device includes a second bracket, a linear drive module is installed on the top of the second bracket, a support plate is installed on the driving end of the linear drive module, and the bottom of the support plate is rotatably connected to the roller; one side of the top of the support plate is rotatably connected to the discharge tray, and the other side is rotatably connected to the receiving tray.

[0011] Furthermore, a reducer is installed on the top of the support plate, the power output end of the reducer is connected to the driving end of the material receiving drive motor, and is connected to the material receiving tray through a synchronous belt drive kit, and the wiping cloth strips output by the material discharge tray pass through the roller shaft to form a "V" shape structure.

[0012] Furthermore, the X-axis cleaning device includes a vertical drive module, a lateral drive module, a carrier plate and a brush; the vertical drive module includes a third bracket, a vertical drive cylinder, a vertical linear guide and a lifting seat, the vertical drive cylinder is installed on the top of the third bracket, and the lifting seat is slidably connected to the third bracket through a vertical linear guide.

[0013] Furthermore, the transverse driving module is composed of a transverse driving cylinder, a transverse linear guide rail and a transverse shifting seat. The transverse driving cylinder is fixed on the lifting seat, and the transverse shifting seat is slidably connected to the lifting seat through the transverse linear guide rail.

[0014] Furthermore, the carrier plate is installed on the transverse seat, and a number of evenly distributed mounting holes are opened inside the carrier plate. The top of the brush is connected to the brush seat. The size of the brush seat is larger than the diameter of the mounting hole. The brush and the brush seat are inserted upside down into the mounting hole as a whole. A vertical clamp is installed on the top of the carrier plate corresponding to each mounting hole position to fix the brush seat.

[0015] In a second aspect, the present invention further provides a cleaning method for the above-mentioned laser engraving character automatic cleaning machine, comprising the following steps: Start the equipment, and the cam divider drives the turntable to rotate intermittently, driving the jig and the PU leather material of the mobile phone back cover to pass through each station in turn; When the fixture rotates to the detergent applying device, the detergent applying device applies the detergent to the laser-engraved characters on the PU leather material of the back cover of the mobile phone; When the jig rotates to the first wiping device and the second wiping device, the first wiping device and the second wiping device wipe the PU leather characters on the back cover of the mobile phone on both sides and the middle of the jig respectively; When the fixture rotates to the X-axis cleaning device, the vertical drive cylinder of the X-axis cleaning device drives the lifting seat to descend, so that the bottom end of the brush contacts the PU leather surface of the mobile phone back cover. The horizontal drive cylinder drives the horizontal movement seat to move back and forth horizontally, driving the brush to clean the character surface in the X-axis direction. After cleaning is completed, the vertical drive cylinder drives it to reset; When the fixture rotates to the Y-axis cleaning device, the Y-axis cleaning device performs Y-axis cleaning using the same principle as the X-axis cleaning device; When the fixture rotates to the loading and unloading station, the external robot takes away the cleaned PU leather material of the mobile phone back cover and puts in the PU leather material of the mobile phone back cover to be cleaned, and repeats the above steps for cyclic cleaning.

[0016] The beneficial effects of the present invention are as follows: the intermittent rotation of the turntable drives the jig and the PU leather material of the mobile phone back cover to pass through the six major stations of loading and unloading, detergent application, first wiping and second wiping, X-axis cleaning and Y-axis cleaning in sequence, realizing full-process automated operation. Compared with traditional manual cleaning methods, the cleaning time of a single product is greatly shortened, the production efficiency is significantly improved, and it can meet the needs of large-scale industrial production. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 A top view of the present invention; Figure 3 This is a schematic structural diagram of the cleaning agent application device of the present invention from a first perspective; Figure 4 A schematic structural diagram of the cleaning agent application device of the present invention from a second viewing angle; Figure 5 This is a schematic structural diagram of the second wiping device of the present invention from a first viewing angle; Figure 6 This is a schematic structural diagram of the second wiping device of the present invention from a second viewing angle; Figure 7 This is a schematic structural diagram of the X-axis cleaning device of the present invention; Figure 8 Schematic diagram of the structure of the vertical drive module in the present invention; Figure 9 Schematic diagram of the structure of the transverse drive module in the present invention; Figure 10 This is a schematic diagram of the structure of the brush installed on the carrier plate in the present invention.

[0018] Figure: 1. Turntable; 2. Loading and unloading station; 3. Detergent applicator; 31. First bracket; 32. Lifting drive cylinder; 33. Main frame; 34. Downward pressure drive cylinder; 35. Sponge; 36. Sub-frame; 37. Feeding drive cylinder; 38. Feeding rack; 39. Detergent tank; 4. First wiping device; 5. Second wiping device; 51. Second bracket; 52. Linear drive module; 53. Support plate; 54. Roller; 55. Discharging tray; 56. Receiving tray; 57. Reducer; 58. Rewinding drive motor; 59. Synchronous belt drive kit; 6. X-axis cleaning device; 61. Vertical drive module; 611. Third bracket; 612. Vertical drive cylinder; 613. Vertical linear guide; 614. Lifting seat; 62. Horizontal drive module; 621. Horizontal drive cylinder; 622. Horizontal linear guide; 623. Horizontal shift seat; 63. Carrier plate; 631. Mounting hole; 632. Brush; 633. Clamp; 634. Brush holder; 7. Y-axis cleaning device; 8. Fixture. DETAILED DESCRIPTION

[0019] Reference Figure 1-2The present invention proposes an automatic cleaning machine for laser engraving characters, comprising a turntable 1 driven by a cam divider to rotate intermittently, and a detergent smearing device 3, a first wiping device 4, a second wiping device 5, an X-axis cleaning device 6, and a Y-axis cleaning device 7 are respectively arranged around a circle of the turntable 1. A plurality of jigs 8 for storing PU leather materials of the back cover of the mobile phone are fixed on the upper part of the turntable 1, and a loading and unloading station 2 is arranged between the detergent smearing device 3 and the Y-axis cleaning device 7. The turntable 1 drives the plurality of jigs 8 to rotate synchronously, and passes through the loading and unloading station 2, the detergent smearing device 3, the first wiping device 4, the second wiping device 5, the X-axis cleaning device 6, and the Y-axis cleaning device 7 in sequence. When it rotates to the position of the loading and unloading station 2, the external robot arm will take away the cleaned PU leather material of the back cover of the mobile phone, and then put the PU leather material of the back cover of the mobile phone to be cleaned into it. When it rotates to the position of the detergent smearing device 3, the detergent smearing device 3 will smear detergent on the characters on the PU leather material of the back cover of the mobile phone, and rotate to the first wiping device 4 and the second wiping device 5, the first wiping device 4 and the second wiping device 5 will wipe the characters on the PU leather material of the back cover of the mobile phone, but the first wiping device 4 and the second wiping device 5 wipe different objects. Three PU leather materials of the back cover of the mobile phone are placed in each jig 8. The first wiping device 4 wipes the PU leather materials of the back cover of the mobile phone on both sides of the jig 8, and the second wiping device 5 wipes the PU leather material of the back cover of the mobile phone in the middle of the jig 8. However, the principles of the first wiping device 4 and the second wiping device 5 are the same, except that the first wiping device 4 has one more wiping structure than the second wiping device 5. When rotating to the position of the X-axis cleaning device 6 and the Y-axis cleaning device 7, the X-axis cleaning device 6 and the Y-axis cleaning device 7 can both use brushes to brush away impurities in the characters. The difference is that the brush of the X-axis cleaning device 6 cleans along the X-axis, and the brush of the Y-axis cleaning device 7 cleans along the Y-axis. The structural principles of the two are the same. When rotating to the loading and unloading station 2 again, the above process is repeated. Reference Figure 3-4 The detergent smearing device 3 includes a first bracket 31, a lifting drive cylinder 32 is installed on the top of the first bracket 31, and a main frame 33 is slidably connected. The lifting drive cylinder 32 drives the main frame 33 to rise and fall. A downward driving cylinder 34 is installed inside the main frame 33. The telescopic end of the downward driving cylinder 34 is connected to a sponge 35. The end of the main frame 33 is connected to a sub-frame 36. A feeding drive cylinder 37 is installed on the top of the sub-frame 36. The telescopic end of the feeding drive cylinder 37 is installed on the feeding rack 38. A detergent storage tank 39 is installed inside the feeding rack 38. The discharge pipe of the detergent storage tank 39 corresponds to the sponge 35. When the detergent smearing device 3 is working, the staff installs the detergent storage tank 39 inside the feeding rack 38. After installation, the discharge pipe of the detergent storage tank 39 faces the sponge 35. When the cleaning agent needs to be injected into the sponge 35, the feeding drive cylinder 37 drives the feeding rack 38 and the detergent storage tank 39 to move downward as a whole and approach the sponge 35. When the discharge pipe of the detergent storage tank 39 contacts the sponge 35, the detergent in the detergent storage tank 39 will be applied to the sponge 35. Then the detergent storage tank 39 is reset, and the downward driving cylinder 34 pushes the sponge 35 downward to correspond to the PU leather material of the back cover of the mobile phone in the jig 8 directly below, and the detergent is applied to the laser engraved characters; Reference Figure 5-6 The second wiping device 5 includes a second bracket 51, a linear drive module 52 is installed on the top of the second bracket 51, and a support plate 53 is installed on the driving end of the linear drive module 52. The bottom of the support plate 53 is rotatably connected to the roller 54, one side of the top of the support plate 53 is rotatably connected to the discharge tray 55, and the other side of the top is rotatably connected to the receiving tray 56. A reducer 57 is installed on the top of the support plate 53, and the power output end of the reducer 57 is connected to the driving end of the receiving drive motor 58. The power output end of the reducer 57 is connected to the receiving tray 56 through a synchronous belt drive kit 59; When the second wiping device 5 is working, the discharge tray 55 will output the wiping cloth strip to the receiving tray 56, and the wiping cloth strip will pass through the roller 54, forming a "V"-shaped structure at the roller 54. As the receiving drive motor 58 drives the receiving tray 56 to rotate through the reducer 57 and the synchronous belt drive kit 59, the wiping cloth will move as a whole. During the movement, it will come into contact with the characters originally coated with the detergent and wipe them. In the wiping process, the linear drive module 52 drives the support plate 53 to move back and forth at different times, so that the wiping cloth moves to the receiving tray 56 for winding while moving along the direction of the characters, so as to fully wipe and improve the wiping effect. Reference Figure 7-10 The X-axis cleaning device 6 is mainly composed of a vertical drive module 61, a horizontal drive module 62, a carrier plate 63, and a brush 632. Through the coordinated movement of the vertical drive module 61 and the horizontal drive module 62, the carrier plate 63 and the brush 632 thereon are driven to move in the horizontal and vertical directions, thereby automatically cleaning the PU leather material of the back cover of the mobile phone with laser engraved characters placed in the fixture 8. The specific scheme is as follows: The vertical drive module 61 includes a third bracket 611, a vertical drive cylinder 612, a vertical linear guide 613, and a lifting base 614. The vertical drive cylinders 612 are mounted on top of the third bracket 611, and the lifting base 614 is slidably connected to the vertical linear guides 613. The vertical linear guides 613 ensure that the lifting base 614, driven by the vertical drive cylinders 612, can stably move up and down along a straight line, reducing friction and shaking during movement and improving movement accuracy and stability. The transverse drive module 62 consists of a transverse drive cylinder 621, a transverse linear guide 622, and a transverse shifting seat 623. The transverse drive cylinder 621 is fixed to the lifting seat 614, and the transverse shifting seat 623 is slidably connected to the lifting seat 614 via the transverse linear guide 622. When the transverse drive cylinder 621 is in operation, it can drive the transverse shifting seat 623 to move back and forth laterally along the transverse linear guide 622, thereby adjusting the position of the carrier plate 63 in the horizontal direction. The carrier plate 63 is mounted on the transverse seat 623 and is a mounting carrier for the brush 632. A plurality of mounting holes 631 are provided inside the carrier plate 63. These mounting holes 631 are evenly distributed and are used to fix the brush 632. The top end of the brush 632 is connected to the brush seat 634, and the size of the brush seat 634 is larger than the diameter of the mounting hole 631. During installation, the brush 632 and the brush seat 634 are inserted into the mounting hole 631 upside down so that the brush seat 634 is engaged with the upper part of the mounting hole 631, thereby achieving the initial fixation of the brush 632. In order to further ensure the stability of the installation of the brush 632, a clamp 633 is installed at the top of the carrier plate 63 and corresponding to the position of each mounting hole 631. The clamp is configured as a vertical clamp. The clamp 633 can apply downward pressure to the brush seat 634 to firmly fix the brush seat 634 in the mounting hole 631 to prevent the brush 632 from loosening or falling off during the cleaning process. When the X-axis cleaning device 6 is working, the vertical drive cylinder 612 is activated, and the vertical drive cylinder 612 drives the lifting seat 614 to descend along the vertical linear guide 613, driving the horizontal drive module 62, the carrier plate 63 and the brush 632 to descend synchronously until the bottom end of the brush 632 contacts the surface of the PU leather material of the mobile phone back cover; The transverse driving cylinder 621 is started, and the transverse driving cylinder 621 drives the transverse moving seat 623 to move back and forth laterally along the transverse linear guide rail 622, driving the carrier plate 63 and the brush 632 to move back and forth in the horizontal direction to clean the character surface.

[0020] After cleaning is completed, the vertical driving cylinder 612 drives the horizontal driving module 62, the carrier plate 63 and the brush 632 to rise and reset synchronously.

[0021] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A laser engraved character automatic cleaning machine, characterized in that: The invention comprises a turntable (1) driven by a cam divider to rotate intermittently, a detergent smearing device (3), a first wiping device (4), a second wiping device (5), an X-axis cleaning device (6), and a Y-axis cleaning device (7) arranged in sequence around the turntable (1), a plurality of jigs (8) for storing PU leather material of a mobile phone back cover are fixed on the upper part of the turntable (1), a loading and unloading station (2) is arranged between the detergent smearing device (3) and the Y-axis cleaning device (7), and the turntable (1) drives the jigs (8) to rotate synchronously and pass through each station in sequence to complete the cleaning operation.

2. The automatic laser engraving character cleaning machine according to claim 1, characterized in that: The cleaning agent smearing device (3) comprises a first bracket (31), a lifting drive cylinder (32) is installed on the top of the first bracket (31) and is slidably connected to the main frame (33), and the lifting drive cylinder (32) drives the main frame (33) to rise and fall; a downward driving cylinder (34) is installed inside the main frame (33), and the telescopic end of the downward driving cylinder (34) is connected to the sponge (35).

3. The automatic laser engraving character cleaning machine according to claim 2, characterized in that: The end of the main frame (33) is connected to the auxiliary frame (36), the top of the auxiliary frame (36) is installed with a feeding drive cylinder (37), the telescopic end of the feeding drive cylinder (37) is installed with a feeding frame (38), the interior of the feeding frame (38) is installed with a detergent storage tank (39), and the discharge pipe of the detergent storage tank (39) corresponds to the sponge (35).

4. The automatic laser engraving character cleaning machine according to claim 1, characterized in that: The second wiping device (5) comprises a second bracket (51), a linear drive module (52) is mounted on the top of the second bracket (51), a support plate (53) is mounted on the driving end of the linear drive module (52), and the bottom of the support plate (53) is rotatably connected to a roller shaft (54); one side of the top of the support plate (53) is rotatably connected to a material discharge tray (55), and the other side is rotatably connected to a material receiving tray (56).

5. The automatic laser engraving character cleaning machine according to claim 4, characterized in that: A speed reducer (57) is installed at the top of the support plate (53), and the power output end of the speed reducer (57) is connected to the driving end of the receiving drive motor (58), and is connected to the receiving tray (56) through a synchronous belt drive kit (59). The wiping cloth strips output from the discharge tray (55) pass through the roller shaft (54) to form a "V"-shaped structure.

6. The automatic laser engraving character cleaning machine according to claim 1, characterized in that: The X-axis cleaning device (6) comprises a vertical drive module (61), a horizontal drive module (62), a carrier plate (63) and a brush (632); the vertical drive module (61) comprises a third bracket (611), a vertical drive cylinder (612), a vertical linear guide rail (613) and a lifting seat (614), wherein the vertical drive cylinder (612) is mounted on the top of the third bracket (611), and the lifting seat (614) is slidably connected to the third bracket (611) via the vertical linear guide rail (613).

7. The automatic laser engraving character cleaning machine according to claim 6, characterized in that: The transverse drive module (62) is composed of a transverse drive cylinder (621), a transverse linear guide rail (622) and a transverse shift seat (623). The transverse drive cylinder (621) is fixed on the lifting seat (614), and the transverse shift seat (623) is slidably connected to the lifting seat (614) via the transverse linear guide rail (622).

8. The automatic laser engraving character cleaning machine according to claim 7, characterized in that: The carrier plate (63) is mounted on the transverse seat (623), and a plurality of evenly distributed mounting holes (631) are provided inside the carrier plate (63). The top end of the brush (632) is connected to the brush seat (634), and the size of the brush seat (634) is larger than the diameter of the mounting hole (631). The brush (632) and the brush seat (634) are integrally inserted upside down into the mounting hole (631). A vertical clamp (633) is installed at the top end of the carrier plate (63) corresponding to each mounting hole (631) to fix the brush seat (634).

9. A cleaning method for the automatic laser engraving character cleaning machine according to any one of claims 1 to 7, characterized in that: The following steps are involved: Start the equipment, and the cam divider drives the turntable (1) to rotate intermittently, driving the fixture (8) and the PU leather material of the mobile phone back cover to pass through each station in sequence; When the jig (8) rotates to the detergent applying device (3), the detergent applying device (3) applies the detergent to the laser-engraved characters on the PU leather material of the back cover of the mobile phone; When the jig (8) rotates to the first wiping device (4) and the second wiping device (5), the first wiping device (4) and the second wiping device (5) respectively wipe the PU leather characters on the back cover of the mobile phone on both sides and in the middle of the jig (8); When the fixture (8) rotates to the X-axis cleaning device (6), the vertical driving cylinder (612) of the X-axis cleaning device (6) drives the lifting seat (614) to descend, so that the bottom end of the brush (632) contacts the surface of the PU leather material of the back cover of the mobile phone, and the horizontal driving cylinder (621) drives the horizontal moving seat (623) to move back and forth horizontally, driving the brush (632) to perform X-axis cleaning on the character surface. After the cleaning is completed, the vertical driving cylinder (612) drives the reset; When the jig (8) rotates to the Y-axis cleaning device (7), the Y-axis cleaning device (7) performs Y-axis cleaning using the same principle as the X-axis cleaning device (6); When the fixture (8) rotates to the loading and unloading station (2), the external manipulator takes away the cleaned mobile phone back cover PU leather material and puts in the mobile phone back cover PU leather material to be cleaned, and repeats the above steps to perform cyclic cleaning.

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