Laser demolding method for vacuum cup

Abstract

The application discloses a laser demolding method of a vacuum cup, which comprises a feeding and discharging system, a conveying system, a demolding system, a dust removal system, a polishing system and a control system. The method comprises the following steps: step one, a mechanical arm of the feeding and discharging area clamps a vacuum cup to be demolded and places the vacuum cup on a clamp of a conveying line in the area; step two, a visual camera transmits the outer dimension of the vacuum cup to the control system, and the control system controls a vacuum cup adjusting mechanism to clamp and adjust the vacuum cup to a demolding position; step three, a laser device irradiates to the coating layer on the surface of the vacuum cup to demold the vacuum cup; step four, the polishing system polishes and oil-finishes the surface of the vacuum cup; and step five, the mechanical arm of the feeding and discharging area clamps the demolded and polished vacuum cup to a discharging area. The laser demolding method of the vacuum cup is short in demolding time, high in efficiency, free of chemical treatment, green and environment-friendly, and especially clean and complete in demolding, free of demolding residues and dead angles.

Description

Technical Field

[0001] This invention relates to a laser de-plasticizing method for thermos cups. Background Technology

[0002] With the improvement of living standards, the thermos cup industry is also developing rapidly worldwide. As a symbol of personalization and branding, the coating materials and color processing technology on the surface of thermos cups are receiving increasing attention. To make thermos cups more aesthetically pleasing and practical, surface coating technology has become one of the most important aspects of thermos cup manufacturing. Surface treatment generally employs various methods such as vacuum plating, polishing, painting, and powder coating. Among these, the surface treatment of thermos cups using powder coating technology, due to process limitations, produces a large number of defective products. This necessitates decoating and re-coating these defective products. Existing decoating processes mainly include: mechanical grinding, polishing, chemical immersion, and ultrasonic decoating. The above-mentioned deplasticizing process has many drawbacks, such as: 1. Residue remains after deplasticizing, which cannot be completely removed from areas like the lettering on the cup body and the recessed corners of the bottom; 2. The process is time-consuming, requiring soaking for the required duration, and the inconsistent soaking and cleaning positions may cause collisions between cups, resulting in scratches, unnecessary steps, or even rendering the cups unusable; 3. Low work efficiency, as the deplasticizing process largely relies on manual feeding, unloading, and cleaning, leading to high labor intensity, and the use of corrosive chemicals that pose a significant health hazard; 4. The processing technology is not environmentally friendly, as the residual chemicals and residues from deplasticizing pose a significant environmental hazard, requiring special treatment and incurring high processing costs. These technical problems in the deplasticizing process for thermos cups no longer meet the current demands for automated production in the thermos cup industry. Summary of the Invention

[0003] The purpose of this invention is to provide a laser deplasticization method for thermos cups, which is not only quick and efficient, but also requires no chemical treatment, is environmentally friendly, and, most importantly, deplasticization is clean and thorough, with no deplasticization residue or dead corners.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A laser de-plasticizing method for thermos cups includes a loading and unloading system, a conveying system, a de-plasticizing system, a dust removal system, a polishing system, and a control system. The loading and unloading system includes a loading / unloading area robotic arm and a polishing system robotic arm. The conveying system includes a circular conveyor line with multiple clamps for holding the thermos cups. The de-plasticizing system includes a laser device for de-plasticizing the thermos cups, a motion device for driving the laser device, and a visual recognition device for identifying the dimensions of the thermos cups. The dust removal system includes a dust cover covering the thermos cup adjustment mechanism to prevent... The dust hood has a first opening on one side of the laser device for the laser to act on the coating on the surface of the thermos cup; there are second openings on both sides in the conveying direction, and each second opening on both sides is equipped with a sealing door. The sealing door can be closed and opened on both sides of the dust hood by connecting a sealing door cylinder to prevent smoke and dust leakage; the side of the dust hood perpendicular to the conveying line also has a third opening, and the third opening is equipped with a slag receiving plate that can enter and exit, and can automatically enter and exit by connecting a slag receiving plate cylinder; it also includes a smoke and dust purification device connected to the side wall of the dust hood through a smoke exhaust pipe for smoke and dust purification treatment; the polishing system is used to polish the surface of the thermos cup after laser deplasticization; it includes the following steps: Step 1: The robotic arm in the loading / unloading area picks up the thermos cups to be deplasticized in the loading area and places them onto the fixtures on the conveyor line in that area. Step 2: When the thermos cups to be deplasticized flow clockwise along the conveyor line to the station corresponding to the vision recognition device, the vision camera transmits the external dimensions of the thermos cups to the control system. When the thermos cups reach the station of the thermos cup adjustment mechanism, the control system controls the adjustment mechanism to grasp and adjust the thermos cups to the deplasticization position and begin rotation. The sealing cylinder pushes the sealing door and slag receiving plate to close the second and third openings of the dust cover. Step 3: The deplasticization laser emitted by the laser device irradiates the coating on the surface of the thermos cup through the first opening of the dust cover 4-1, thus deplasticizing the thermos cup. Step 4: After deplasticization, the control system moves the laser within a corresponding range based on the external dimensions provided by the vision camera. The fumes generated by laser deplasticization are drawn into the fume purification device through the exhaust pipe and then discharged. Step 5: After deplasticization, the gripper of the thermos cup adjustment mechanism places the thermos cup on the fixture and transfers it to the polishing system station. The robotic arm in the polishing system area picks up the deplasticized thermos cup and places it in the polishing system. The polishing system performs polishing and oiling treatment on the surface of the thermos cup. Step 6: After the thermos cup is polished and oiled, the robotic arm in the polishing system area picks it up and places it back on the fixture of the conveyor line and transfers it to the loading and unloading area robotic arm. The loading and unloading area robotic arm picks up the deplasticized and polished thermos cup and places it in the unloading area.

[0005] The laser device includes, from top to bottom: a QBH connector for connecting the laser, a laser collimation module for converting the laser beam into parallel light, a focusing module for focusing laser energy to change the spot size, a focusing protection mirror for protecting the focusing module, a galvanometer protection mirror for protecting the digital galvanometer, the digital galvanometer for controlling the laser's output range, and a field mirror located to the right of the digital galvanometer for equalizing the energy at each point within the laser scanning range. The digital galvanometer includes an X-axis lens and a Y-axis lens. The X-axis lens is used to adjust the length of the laser beam in the vertical direction, and the Y-axis lens is used to adjust the deflection of the laser beam in the horizontal direction.

[0006] It also has a cooling water connector to cool the entire laser device.

[0007] The laser is a MOPA laser, a femtosecond laser, a semiconductor laser, a YAG laser, a fiber laser, or a carbon dioxide laser.

[0008] The motion device includes an X-axis motion module, a Y-axis motion module, and a Z-axis motion module, which drive the laser device to move in various directions. The X-axis motion module, Y-axis motion module, and Z-axis motion module are all screw drive structures.

[0009] The thermos cup adjustment mechanism is specifically a rotatable and vertically movable gripper used to grasp the thermos cup and adjust its vertical position and circumferential direction so that the laser device can remove all coatings from the surface of the thermos cup.

[0010] Compared with the prior art, the beneficial effects of the present invention are as follows: Using the above-mentioned laser deplasticizing scheme, the laser emitted by the laser device irradiates the coating on the surface of the thermos cup through the first opening of the dust cover to deplasticize the thermos cup. The control system moves the laser within a corresponding range based on the external dimensions provided by the vision camera. The fumes generated by the laser deplasticizing are drawn into the fume purification device through the exhaust pipe and then discharged. This technical solution not only has a short deplasticizing time and high efficiency, but also requires no chemical treatment, is environmentally friendly, and deplasticizes cleanly and thoroughly. In particular, it can remove the coating on the lettering areas or other uneven parts of the cup body (it can remove the coating within the uneven patterns on the cup body, with unevenness within 3mm, without damaging the thermos cup body), leaving no deplasticizing residue or dead corners.

[0011] Further beneficial effects are: using the laser device of the present invention, the laser beam can be emitted through a digital galvanometer to match the height of the plastic powder layer on the body of the thermos cup. After the thermos cup rotates once (the gripper grips the mouth of the thermos cup, where there is no plastic powder), the vertical laser beam can complete the removal of all plastic powder. The plastic removal is highly accurate, fast, and low in cost, making plastic removal more environmentally friendly, reducing harm to the human body and the environment, and easy to automate. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 yes Figure 1 Schematic diagram of the dust removal system; Figure 3 yes Figure 2 Rear structural diagram; Figure 4 yes Figure 1 A schematic diagram of the structure of the laser device; Figure 5 yes Figure 1 A schematic diagram of the adjustment mechanism of a thermos cup; Figure 6 yes Figure 5 A schematic diagram of the structure of the thermos cup adjustment mechanism that grips the mouth of the thermos cup; Figure 7 This is a schematic diagram of the transmission trajectory of a laser beam in a laser device; Figure 8 yes Figure 1 Schematic diagram of the middle clamp; Figure 9 yes Figure 1 A schematic diagram of the structure from another direction. Implementation

[0013] To make the technical solution of the present invention clearer, the following description is provided in conjunction with the appendix. Figures 1 to 9 This invention will be described in detail below. It should be understood that the specific embodiments described in this specification are merely for explaining the invention and are not intended to limit the scope of protection of the invention.

[0014] This invention relates to a laser deplasticizing method for thermos cups, comprising a loading and unloading system 1, a conveying system 2, a deplasticizing system 3, a dust removal system 4, a polishing system 5, and a control system 6. The loading and unloading system 1 for gripping the thermos cup 0 includes a loading and unloading area robotic arm 1-1 in the loading and unloading area 7 and a polishing system area robotic arm 1-2 in the polishing system 5; the conveying system 2 includes a circular circulating conveyor line 2-1, on which multiple clamps 2-2 for placing the thermos cup 0 are provided. The clamps 2-2 are preferably composed of multiple stacked frustums of different diameters, each frustum having a diameter adapted to the inner diameter of the corresponding thermos cup 0; the deplasticizing system 3 includes a laser device 3-1 for deplasticizing the thermos cup 0, a motion device 3-2 for driving the laser device 3-1, and a visual recognition device 3-3 for identifying the external dimensions of the thermos cup 0; the dust removal system 4 includes a dust cover 4-1 covering the thermos cup adjustment mechanism 3-3-2. The dust cover 4-1 has a first opening 4-1-1 on one side of the laser device 3-1 for the laser to act on the coating on the surface of the thermos cup; and second openings 4-1-2 on both sides in the conveying direction. The second openings on both sides are equipped with sealing doors 4-2. The sealing doors 4-2 can be closed and opened on both sides of the dust cover 4-1 by connecting sealing door cylinders 4-3 to prevent smoke and dust leakage. The side of the dust cover perpendicular to the conveyor line is also equipped with a third opening 4-1-3. The third opening 4-1-3 is equipped with a slag receiving plate 4-4 that can enter and exit, and can automatically enter and exit by connecting slag receiving plate cylinders 4-5. It also includes a smoke and dust purification device connected to the side wall of the dust cover through a smoke exhaust pipe for smoke and dust purification. The polishing system 5 is used to polish the surface of the thermos cup after laser deplasticization. The surface texture and smoothness of the treated thermos cup meet the requirements and can be reused. The polishing system is an existing technology, such as the fully automatic integrated cup polishing equipment of patent CN201620951888.1, the centerless polishing machine of metal thermos cup CN201620951889.6, and the automatic polishing machine of CN201220626099.2, all of which can be applied here. The laser de-plasticizing method for the thermos cup includes the following steps: Step 1: In the loading and unloading area, the robotic arm 1-1 picks up the thermos cup 0 to be de-plasticized in the loading area and places it on the clamp 2-2 of the conveyor line 2-1 in that area; Step 2: When the thermos cup 0 to be deplasticized flows clockwise along the conveyor line 2-1 to the station corresponding to the vision recognition device 3-3, the vision camera 3-3-1 transmits the external dimensions of the thermos cup 0 to the control system 6. When the thermos cup 0 flows to the station where the thermos cup adjustment mechanism 3-3-2 is located, the control system 6 controls the thermos cup adjustment mechanism 3-3-2 to grab and adjust the thermos cup 0 to the deplasticization position and start rotating. The sealing cylinder 4-3 pushes the sealing door 4-2 and the slag receiving plate 4-4 to close the second opening 4-1-2 and the third opening 4-1-3 of the dust cover 4-1. Step 3: The deplasticizing laser emitted by the laser device 3-1 shines on the coating on the surface of the thermos cup 0 through the first opening 4-1-1 of the dust cover 4-1 to deplasticize the thermos cup 0. The control system 6 moves the laser within the corresponding range according to the external dimensions provided by the vision camera 3-3-1. The smoke and dust generated by the laser deplasticizing are drawn into the smoke and dust purification device through the smoke exhaust pipe and then discharged. Step 4: After the plastic removal is completed, the gripper 3-3-2-1 of the thermos cup adjustment mechanism 3-3-2 places the thermos cup 0 onto the fixture 2-2 and transfers it to the polishing system 5 station. The robotic arm 1-2 in the polishing system area picks up the deplasticized thermos cup 0 and transfers it to the polishing system 5. The polishing system 5 performs polishing and oiling treatment on the surface of the thermos cup 0. Step 5: After the thermos cup 0 is polished, the polishing system robotic arm 1-2 picks it up and puts it back onto the clamp 2-2 of the conveyor line 2-1, and then transfers it to the loading and unloading area robotic arm 1-1. The loading and unloading area robotic arm 1-1 picks up the thermos cup 0 after the plastic removal and polishing is completed and puts it into the unloading area.

[0015] Preferably, the laser device 3-1 includes, from top to bottom: a QBH connector 3-1-1 for connecting the laser, a laser collimation module 3-1-2 for converting the laser beam into parallel light, a focusing module 3-1-3 (including a focusing lens) for focusing laser energy to change the spot size, a focusing protection lens 3-1-4 for protecting the focusing module 3-1-3, a galvanometer protection lens 3-1-5 for protecting the digital galvanometer, the digital galvanometer for controlling the laser beam shape or length range, and a lens located at the digital galvanometer... The field mirror 3-1-7 on the right side of the mirror is used to equalize the energy of each point within the laser scanning range. The digital galvanometer includes a digital galvanometer X-axis lens 3-1-6 and a digital galvanometer Y-axis lens 3-1-6' (both of which can preferably be the SCAN (10.6um) PMXA202A scanning mirror, manufactured by Han's Laser). The digital galvanometer X-axis lens 3-1-6 is used to adjust the length of the laser beam in the vertical direction, and the digital galvanometer Y-axis lens 3-1-6' is used to adjust the deflection of the laser beam in the horizontal direction.

[0016] Preferably, a cooling water connector 3-1-8 is also provided to cool the entire laser device 3-1. The laser is a MOPA laser, a femtosecond laser, a semiconductor laser, a YAG laser, a fiber laser, or a carbon dioxide laser. The motion device 3-2 includes an X-axis motion module 3-2-1, a Y-axis motion module 3-2-2, and a Z-axis motion module 3-2-3, which drive the laser device 3-1 to move in various directions. The X-axis motion module 3-2-1, the Y-axis motion module 3-2-2, and the Z-axis motion module 3-2-3 are all screw drive structures. The thermos cup adjustment mechanism 3-3-2 is specifically a rotatable and vertically movable gripper 3-3-2-1, used to grip the mouth 0-1 of the thermos cup (where there is no plastic powder) and adjust the vertical position and circumferential direction of the thermos cup 0. Using the laser device of this invention, the laser beam is emitted through a digital galvanometer to match the height of the plastic powder layer on the body 0-2 of the thermos cup. After the thermos cup 0 rotates one revolution, the vertical laser beam can complete the removal of all plastic powder. The plastic removal is highly accurate, fast, and low-cost, making plastic removal more environmentally friendly, reducing harm to the human body and the environment, and easy to automate.

Claims

1. A laser deplasticizing method for a thermos cup, comprising a loading and unloading system (1), a conveying system (2), a deplasticizing system (3), a dust removal system (4), a polishing system (5), and a control system (6). The loading and unloading system (1) for gripping the thermos cup (0) includes a loading and unloading area robot arm (1-1) set in the loading and unloading area and a polishing system area robot arm (1-2) set in the polishing system 5. The conveying system (2) includes a circular conveyor line (2-1) with multiple clamps (2-2) for placing thermos cups (0) on the conveyor line (2-1). The deplasticizing system (3) includes a laser device (3-1) for deplasticizing the thermos cup (0), a motion device (3-2) for driving the laser device (3-1) to move, and a visual recognition device (3-3) for recognizing the external dimensions of the thermos cup (0). The dust removal system (4) includes a dust cover (4-1) covering the thermos cup adjustment mechanism (3-3-2). The dust cover (4-1) has a first opening (4-1-1) on one side of the laser device (3-1) for the laser to act on the coating on the surface of the thermos cup. There are second openings (4-1-2) on both sides of the conveying direction. The second openings on both sides are equipped with sealing doors (4-2). The sealing doors (4-2) can be closed and opened on both sides of the second openings (4-1-2) of the dust cover (4-1) by connecting the sealing door cylinder (4-3) to prevent smoke and dust leakage. The side of the dust cover perpendicular to the conveying line is also equipped with a third opening (4-1-3). The third opening (4-1-3) is equipped with a slag receiving plate (4-4) that can enter and exit, and can automatically enter and exit by connecting the slag receiving plate cylinder (4-5). It also includes a smoke and dust purification device connected to the side wall of the dust cover through a smoke exhaust pipe for smoke and dust purification treatment. The polishing system (5) is used to polish the surface of the thermos cup after laser deplasticization. Its features include the following steps: Step 1: The robotic arm (1-1) in the loading and unloading area picks up the thermos cup (0) to be deplasticized in the loading area and places it on the clamp (2-2) of the conveyor line (2-1) in that area; Step 2: When the thermos cup (0) to be deplasticized flows clockwise along the conveyor line (2-1) to the station corresponding to the vision recognition device (3-3), the vision camera (3-3-1) transmits the external dimensions of the thermos cup (0) to the control system (6). When the thermos cup (0) flows to the station of the thermos cup adjustment mechanism (3-3-2), the control system (6) controls the thermos cup adjustment mechanism (3-3-2) to grab and adjust the thermos cup (0) to the deplasticization position and start rotating. The sealing cylinder (4-3) pushes the sealing door (4-2) and the slag receiving plate (4-4) to close the second opening (4-1-2) and the third opening (4-1-3) of the dust cover (4-1). Step 3: The deplasticizing laser emitted by the laser device (3-1) shines on the coating on the surface of the thermos cup (0) through the first opening (4-1-1) of the dust cover 4-1 to deplasticize the thermos cup (0). The control system (6) moves the laser within the corresponding range according to the external dimensions provided by the vision camera (3-3-1). The smoke and dust generated by the laser deplasticizing are drawn into the smoke and dust purification device through the exhaust pipe and then discharged. Step 4: After the plastic removal is completed, the gripper (3-3-2-1) of the thermos cup adjustment mechanism (3-3-2) places the thermos cup (0) onto the fixture (2-2) and transfers it to the polishing system (5) station. The robotic arm (1-2) of the polishing system picks up the thermos cup (0) after plastic removal and transfers it to the polishing system (5). The polishing system (5) performs polishing and oiling treatment on the surface of the thermos cup (0). Step 5: After the thermos cup (0) is polished, the mechanical arm (1-2) in the polishing system area grabs it and puts it back onto the clamp (2-2) of the conveyor line (2-1) and transfers it to the loading and unloading area mechanical arm (1-1). The loading and unloading area mechanical arm (1-1) clamps the thermos cup (0) after the plastic removal and polishing is completed and puts it into the unloading area. The motion device (3-2) includes: The X-axis motion module (3-2-1), Y-axis motion module (3-2-2), and Z-axis motion module (3-2-3) drive the laser device (3-1) to move in various directions. The X-axis motion module (3-2-1), Y-axis motion module (3-2-2), and Z-axis motion module (3-2-3) are all screw drive structures.

2. The laser de-molding method for a thermos cup according to claim 1, characterized in that, The laser device (3-1) includes, from top to bottom: a QBH connector (3-1-1) for connecting the laser, a laser collimation module (3-1-2) for converting the laser beam into parallel light, a focusing module (3-1-3) for focusing laser energy to change the spot size, a focusing protection mirror (3-1-4) for protecting the focusing module (3-1-3), a galvanometer protection mirror (3-1-5) for protecting the digital galvanometer, the digital galvanometer for controlling the laser output range, and a field mirror (3-1-7) located to the right of the digital galvanometer for equalizing the energy of each point within the laser scanning range. The digital galvanometer includes a digital galvanometer X-axis lens (3-1-6) and a digital galvanometer Y-axis lens (3-1-6'). The digital galvanometer X-axis lens (3-1-6) is used to adjust the length of the laser beam in the vertical direction, and the digital galvanometer Y-axis lens (3-1-6') is used to adjust the offset of the laser beam in the horizontal direction.

3. The laser de-molding method for a thermos cup according to claim 2, characterized in that: It is also equipped with a cooling water connector (3-1-8) to cool the entire laser device (3-1).

4. The laser de-molding method for a thermos cup according to claim 2 or 3, characterized in that: The laser is a MOPA laser, a femtosecond laser, a semiconductor laser, a YAG laser, a fiber laser, or a carbon dioxide laser.

5. The laser demolding method for a thermos cup according to claim 4, characterized in that: The thermos cup adjustment mechanism (3-3-2) is specifically a rotatable and vertically movable gripper (3-3-2-1) used to grip the thermos cup (0) and adjust the vertical position and circumferential direction of the thermos cup (0) so that the laser device (3-1) removes all coatings from the surface of the thermos cup (0).

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