Positioning and sewing device for preventing deviation in mask processing

Abstract

This invention proposes a positioning and sewing device for mask processing to prevent displacement. It includes a processing table with support legs at its four corners and a three-axis robot on top. An ultrasonic welding and sewing device is mounted on the free end of the three-axis robot. A mold base is located on top of the processing table, with a cavity for holding the mask. A pressure plate is positioned above the cavity, and its top is connected to a lifting device via an L-shaped support arm. The lifting device allows the pressure plate to be placed inside or raised above the cavity. In use, this invention allows for rapid mask positioning, preventing displacement. Once the pressure plate holds the mask in place, the four sewing points are clearly visible for easy observation. Furthermore, the operator can easily position the mask straps using a U-shaped limiting seat, making the welding process smoother.

Description

Technical Field

[0001] This utility model relates to the field of mask welding and sewing technology, specifically a positioning and sewing device for mask processing to prevent displacement. Background Technology

[0002] An ultrasonic welding machine for mask straps is a device that uses ultrasonic technology for welding, primarily used in the mask production process for welding ear loops, edge sealing, and other parts. The ultrasonic welding machine converts 50-60Hz alternating current into 20-40kHz high-frequency electrical energy using an ultrasonic generator. This high-energy, high-frequency mechanical vibration is generated by a transducer system, and then converted into coaxial, counter-rotating mechanical motion via piezoelectric crystals and magnetostrictive transducers, thus achieving welding.

[0003] Existing mask strap welding machines require manual handling. The mask is held by hand, one corner is placed in a mold, and then one end of the strap is positioned at the welding point. The ultrasonic welding head, driven by a cylinder, is then positioned on the welding point to achieve the weld. However, during the welding process, the lack of a positioning device for the strap at the welding point often results in misalignment of the strap end, leading to welding failure. Furthermore, the process of repeatedly placing the four corners of the mask back and forth in the mold is cumbersome. Therefore, we propose a positioning and sewing device for mask processing to prevent misalignment. Utility Model Content

[0004] This invention provides a positioning and sewing device for mask processing to prevent misalignment. It has the advantages of quickly positioning the mask and preventing the mask from shifting, thus solving the problems mentioned in the background art.

[0005] The technical solution of this utility model is implemented as follows: A positioning and sewing device for mask processing to prevent displacement is designed, including a processing table, support legs at the four corners of the bottom of the processing table, a three-axis robot on the top of the processing table, an ultrasonic welding and sewing device installed on the free end of the three-axis robot, a mold base on the top of the processing table, a cavity for placing the mask on the top of the mold base, a pressure plate on the top of the cavity, and the top of the pressure plate is connected to a lifting device through an L-shaped support arm. Under the drive of the lifting device, the pressure plate is placed in the cavity or raised above the cavity. Two welding joints corresponding to the sewing points of the mask straps are symmetrically provided at both ends of the pressure plate.

[0006] Preferably, two U-shaped limiting seats are provided at both ends of the cavity, each corresponding to the welding port. When the pressing sheet is placed in the cavity, the welding port is located on one side of the U-shaped limiting seat.

[0007] Preferably, the lifting device includes a connecting seat located on one side of the mold base, an L-shaped support arm with the end away from the pressing plate mounted on the connecting seat, a first guide shaft and a first cylinder vertically mounted below the connecting seat, the first guide shaft being movably placed within the processing table, and the first cylinder being mounted below the processing table.

[0008] Preferably, a control cabinet is provided below the processing table, and a controller is provided inside the control cabinet. The controller is connected to the first cylinder and also to a foot switch. The foot switch is installed on a strip frame, which is located below the support leg, and both ends of the strip frame are connected to the support leg through reinforcing rods.

[0009] Preferably, the three-axis robot includes a support frame vertically mounted on the side of the processing table away from the mold base. Two support beams are symmetrically and horizontally mounted on both sides of the top of the support frame. The support beams are horizontally positioned above the processing table. A first guide rail is mounted parallel to the top of each support beam. A connecting beam perpendicular to the first guide rail is provided above the two support beams. The two ends of the connecting beam are connected to the first guide rail via sliders. A first linear drive module connected to the connecting beam is provided on one side of one of the support beams. A second linear drive module is mounted parallel to the top of the connecting beam. A second guide rail is provided on the side of the connecting beam. The second guide rail is connected to an L-shaped frame via a slider. The top of the L-shaped frame is connected to the second linear drive module. The L-shaped frame extends below the connecting beam and has a mounting seat horizontally provided at the bottom of its side. A second cylinder is provided on the top of the mounting seat. An ultrasonic welding and stitching device is installed below the second cylinder. The second cylinder, the second linear drive module, and the first linear drive module are respectively connected to a controller.

[0010] Preferably, at least one second guide shaft is provided parallel to the side of the second cylinder, the bottom of the second guide shaft is connected to the ultrasonic welding and stitching device, and the second guide shaft is movably placed in the mounting seat.

[0011] Preferably, the ultrasonic welding and stitching device includes a U-shaped frame, the top of which is connected to a second guide shaft and the bottom of a second cylinder, an amplitude transformer is installed at the bottom of the U-shaped frame, a transducer is provided at the top of the amplitude transformer, a welding head is provided at the bottom of the amplitude transformer, the transducer is connected to an ultrasonic generator, and the ultrasonic generator is connected to a controller.

[0012] Preferably, grating rulers are provided on the top of the connecting beam and the support beam. The grating rulers are connected to the controller. The two grating rulers are parallel to the second linear drive module, and the reading heads of the two grating rulers are connected to the L-shaped frame and the connecting beam, respectively.

[0013] Preferably, the tablet has a porous structure.

[0014] Compared with existing technologies, this invention, when in use, places the mask inside the cavity, then controls the first cylinder to drive the pressure plate to press the mask down. At this point, the welding position of the mask is directly located inside the welding joint, eliminating the need for the operator to deliberately locate the welding point. The operator holds one end of the mask strap and places it within the U-shaped limiting seat, simultaneously positioning the end of the mask within the welding joint for real-time welding. This method allows for the welding and fixing of each of the four seam points of the mask one by one. The advantages of this operation are that the mask can be quickly positioned, preventing displacement, and the four seam points are readily visible after the pressure plate presses down on the mask for easy observation. Furthermore, the operator can easily position the mask strap using the U-shaped limiting seat, making the welding process smoother. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a three-dimensional structural diagram of the front part of this utility model.

[0017] Figure 2 This is a three-dimensional structural diagram of the rear side of this utility model.

[0018] Figure 3 This is a side view of the present invention.

[0019] Figure 4 This is a schematic diagram of the specific structure of the tablet press and cavity of this utility model. Figure 1 .

[0020] Figure 5 This is a schematic diagram of the specific structure of the tablet press and cavity of this utility model. Figure 2 .

[0021] In the diagram: 1. Processing table; 2. Pressing plate; 3. Welding joint; 4. U-shaped limiting seat; 5. Cavity; 6. Mold base; 7. First guide shaft; 8. First cylinder; 9. Connecting seat; 10. L-shaped support arm; 11. Welding head; 12. Amplitude bar; 13. U-shaped frame; 14. Transducer; 15. Second guide shaft; 16. First linear drive module; 17. L-shaped frame; 18. Second linear drive module; 19. Connecting beam; 20. First guide rail; 21. Support beam; 22. Second cylinder; 23. Mounting seat; 24. Support leg; 25. Control cabinet; 26. Strip frame; 27. Foot switch; 28. Support frame; 29. ​​Second guide rail; 30. Grating ruler. Detailed Implementation

[0022] The technical solution of this utility model will be clearly and completely described below with reference to its embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0023] Reference Figures 1 to 5 This utility model provides a technical solution: a positioning and sewing device for mask processing to prevent displacement, including a processing table 1, support legs 24 at the four corners of the bottom of the processing table 1, a three-axis robot at the top of the processing table 1, and an ultrasonic welding and sewing device installed on the free end of the three-axis robot.

[0024] First, it is necessary to introduce the specific structure of the three-axis robot, such as... Figure 1 and Figure 2 As shown, the three-axis robot includes a support frame 28 vertically mounted on the side of the processing table 1 away from the mold base 6. Two support beams 21 are symmetrically and horizontally mounted on both sides of the top of the support frame 28. The support beams 21 are horizontally positioned above the processing table 1. A first guide rail 20 is mounted parallel to the top of each support beam 21. A connecting beam 19 perpendicular to the first guide rail 20 is provided above the two support beams 21. The two ends of the connecting beam 19 are connected to the first guide rail 20 through sliders, allowing the connecting beam 19 to move back and forth along the first guide rail 20. A first linear drive module 16 connected to the connecting beam 19 is provided on one side of one of the support beams 21, so the first linear drive module 16 can drive the connecting beam 19 to move along the first guide rail 20.

[0025] Next, a second linear drive module 18 is installed parallel to the top of the connecting beam 19. A second guide rail 29 is provided on the side of the connecting beam 19. The second guide rail 29 is connected to the L-shaped frame 17 through a slider. The top of the L-shaped frame 17 is connected to the second linear drive module 18. Therefore, when the second linear drive module 18 moves, it can drive the L-shaped frame 17 to move back and forth along the second guide rail 29.

[0026] The L-shaped frame 17 extends below the connecting beam 19, and a mounting base 23 is horizontally provided on its bottom side. A second cylinder 22 is located on the top of the mounting base 23, and the ultrasonic welding and stitching device is installed below the second cylinder 22. At least one second guide shaft 15 is provided parallel to the side of the second cylinder 22, and the bottom of the second guide shaft 15 is connected to the ultrasonic welding and stitching device. The second guide shaft 15 is movably placed within the mounting base 23, specifically within a guide seat, and then the guide seat is fixed to the mounting base 23. In this way, when the second cylinder 22 rises and falls, it can drive the ultrasonic welding and stitching device to rise and fall, and the second guide shaft 15 enhances the stability of the ultrasonic welding and stitching device's vertical movement.

[0027] Secondly, it is necessary to introduce the specific structure of the ultrasonic welding and stitching device, such as... Figure 1 and Figure 3 As shown, the ultrasonic welding and stitching device includes a U-shaped frame 13. During installation, the top of the U-shaped frame 13 is connected to the second guide shaft 15 and the bottom of the second cylinder 22, thus integrating the U-shaped frame 13 with the second guide shaft 15 and the second cylinder 22. An amplitude transformer 12 is installed at the bottom of the U-shaped frame 13. A transducer 14 is located at the top of the amplitude transformer 12, and a welding head 11 is located at the bottom of the amplitude transformer 12. The transducer 14 is connected to the ultrasonic generator.

[0028] The ultrasonic generator, the second cylinder 22, the second linear drive module 18, and the first linear drive module 16 are respectively connected to a controller, which is either a host computer or a PLC logic controller. This is to enable real-time monitoring of the linear travel distance of the first linear drive module 16 and the second linear drive module 18. Figure 2 As shown, grating rulers 30 are provided on the top of the connecting beam 19 and the support beam 21. The grating rulers 30 are connected to the controller. The two grating rulers 30 are parallel to the first linear drive module 16 and the second linear drive module 18, respectively. The reading heads of the two grating rulers 30 are connected to the L-shaped frame 17 and the connecting beam 19, respectively. In this way, the movement distance of the second linear drive module 18 and the first linear drive module 16 can be monitored.

[0029] Based on the above embodiments, corresponding to the ultrasonic welding and sewing device, a mold base 6 is provided on the top of the processing table 1, and a cavity 5 for placing the mask is provided on the top of the mold base 6. The mask to be welded can be positioned in the cavity 5, which can prevent the mask from shifting.

[0030] Next, a pressure plate 2 is installed above the top of the cavity 5. The size of the pressure plate 2 needs to match the size of the cavity 5. The top of the pressure plate 2 is connected to the lifting device via an L-shaped support arm 10. Figure 1 and Figure 3As shown, the lifting device includes a connecting seat 9 located on one side of the mold base 6. The end of the L-shaped support arm 10 away from the pressure plate 2 is installed on the connecting seat 9. A first guide shaft 7 and a first cylinder 8 are vertically installed below the connecting seat 9. The first cylinder 8 is connected to the controller. The first guide shaft 7 is movably placed inside the processing table 1, while the first cylinder 8 is installed below the processing table 1. When the first cylinder 8 moves up and down, it can drive the connecting seat 9 and the L-shaped support arm 10 to move. That is, under the drive of the lifting device, the pressure plate 2 is placed in the cavity 5 or raised above the cavity 5. When the pressure plate 2 is raised, a mask can be placed in the cavity 5. When the pressure plate 2 is placed inside the cavity 5, the mask can be pressed down, which further makes the mask more stable.

[0031] like Figure 4 and Figure 5 As shown, two welding ports 3 are symmetrically provided at both ends of the pressure plate 2, which correspond to the sewing points of the mask straps respectively. Moreover, two U-shaped limiting seats 4 are provided at both ends of the cavity 5, which correspond to the welding ports 3 respectively. When the pressure plate 2 is placed in the cavity 5, the welding ports 3 are located on one side of the U-shaped limiting seats 4.

[0032] The specific operation process is as follows: First, the mask is placed inside the cavity 5, and then the first cylinder 8 is controlled to drive the pressure plate 2 to press the mask down. At this time, the welding joints 3 correspond to the four seam points of the mask, such as... Figure 5 As shown, first, hold one end of the mask strap and place it inside the U-shaped limiting seat 4 at point A. Remember that your hand should be outside the U-shaped limiting seat 4. Pinch one end of the mask strap with your thumb and forefinger, place one end of the mask inside the U-shaped limiting seat 4, and place the end of the mask inside the welding port 3. At this time, the three-axis robot will drive the welding head 11 to weld once inside the welding port 3 and then move to the area above point B.

[0033] 2. Since one end of the mask strap is already fixed to the mask, the operator only needs to pinch the free end of the mask strap and place it in the U-shaped limiting seat 4 at point B, and place the end of the mask in the welding port 3. At this time, the three-axis robot drives the welding head 11 to place in the welding port 3 for welding. After welding is completed, the welding head 11 moves to the top of point C.

[0034] 3. The welding method for points C and D is the same as that for points A and B. After the seam at points C and D is welded, the welding head 11 automatically returns to above point A, and the first cylinder 8 automatically lifts. At this time, the complete mask can remain in the cavity 5. Take it out and put in a new mask and repeat the operation.

[0035] In summary, the above process ensures the mask is positioned correctly, preventing displacement. Once the pressure plate 2 holds the mask in place, the four seam points are positioned. Simply place the mask straps sequentially into the four welding points 3 (A, B, C, and D). The U-shaped positioning seat 4 directly positions the mask straps, making the welding process smoother. It should be noted that A, B, C, and D are for illustrative purposes only; in actual use, the welding order can be determined based on specific circumstances.

[0036] Furthermore, a control cabinet 25 is located beneath the processing table 1, housing both the controller and the ultrasonic generator. The controller is also connected to a foot switch 27, such as... Figure 1 As shown, the foot switch 27 is installed on the strip frame 26, which is located below the support leg 24. Both ends of the strip frame 26 are connected to the support leg 24 through reinforcing rods. The foot switch allows the operator to control the entire equipment with their feet.

[0037] Based on the above embodiments, further optimization is possible. The tablet 2 has a porous structure, which allows the air in the tablet 2 and cavity 5 to be quickly discharged.

[0038] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A positioning and sewing device for preventing deviation in mask processing, comprising a processing table (1), the bottom corners of which are provided with supporting legs (24), characterized in that, The top of the processing table (1) is equipped with a three-axis robot, and an ultrasonic welding and stitching device is installed on the free end of the three-axis robot; The processing table (1) has a mold base (6) on top, and the mold base (6) has a cavity (5) on top for placing the mask. A pressure plate (2) is provided above the top of the cavity (5). The top of the pressure plate (2) is connected to a lifting device via an L-shaped support arm (10). Under the action of the lifting device, the pressure plate (2) is placed inside the cavity (5) or raised above the cavity (5); and, Two welding ports (3) are symmetrically provided at both ends of the compression plate (2) and are respectively corresponding to the sewing points of the mask strap.

2. The deviation preventing positioning and sewing device for mask processing according to claim 1, wherein Two U-shaped limiting seats (4) are provided at both ends of the cavity (5) respectively, corresponding to the welding port (3). When the pressing plate (2) is placed in the cavity (5), the welding port (3) is located on one side of the U-shaped limiting seat (4).

3. The deviation preventing positioning and sewing device for mask processing according to claim 2, wherein The lifting device includes a connecting seat (9) located on one side of the mold base (6), and an L-shaped support arm (10) with one end away from the pressing plate (2) mounted on the connecting seat (9). A first guide shaft (7) and a first cylinder (8) are vertically mounted below the connecting seat (9). The first guide shaft (7) is movably placed inside the processing table (1), while the first cylinder (8) is installed below the processing table (1).

4. The deviation preventing positioning and sewing device for mask processing according to claim 3, wherein A control cabinet (25) is provided below the processing table (1), and a controller is provided inside the control cabinet (25). The controller is connected to the first cylinder (8). The controller is also connected to a foot switch (27), which is mounted on a bar frame (26). The bar frame (26) is located below the support leg (24), and both ends of the bar frame (26) are connected to the support leg (24) via reinforcing rods.

5. The shift preventing mask processing positioning sewing device according to claim 4, wherein The three-axis robot includes a support frame (28) that is vertically set on the side of the processing table (1) away from the mold base (6). Two support beams (21) are symmetrically and horizontally installed on both sides of the top of the support frame (28). The support beams (21) are horizontally placed above the processing table (1). A first guide rail (20) is installed parallel to the top of each support beam (21). Above the two support beams (21) is a connecting beam (19) perpendicular to the first guide rail (20). The two ends of the connecting beam (19) are connected to the first guide rail (20) by sliders. On one side of one of the support beams (21) is a first linear drive module (16) connected to the connecting beam (19). A second linear drive module (18) is installed parallel to the top of the connecting beam (19), and a second guide rail (29) is provided on the side of the connecting beam (19). The second guide rail (29) is connected to the L-shaped frame (17) through a slider. The top of the L-shaped frame (17) is connected to the second linear drive module (18). The L-shaped frame (17) extends below the connecting beam (19) and has a horizontal mounting base (23) at its bottom side. A second cylinder (22) is located on top of the mounting base (23), and an ultrasonic welding and stitching device is installed below the second cylinder (22); and, The second cylinder (22), the second linear drive module (18), and the first linear drive module (16) are respectively connected to the controller.

6. The deviation preventing positioning and sewing device for mask processing according to claim 5, wherein The second cylinder (22) has at least one second guide shaft (15) parallel to its side. The bottom of the second guide shaft (15) is connected to the ultrasonic welding and stitching device. The second guide shaft (15) is movably placed in the mounting seat (23).

7. The shift preventing mask processing positioning sewing device according to claim 6, wherein The ultrasonic welding and stitching device includes a U-shaped frame (13), the top of which is connected to the second guide shaft (15) and the bottom of the second cylinder (22); The bottom of the U-shaped frame (13) is equipped with an amplitude transformer (12), the top of the amplitude transformer (12) is equipped with a transducer (14), the bottom of the amplitude transformer (12) is equipped with a welding head (11), the transducer (14) is connected to the ultrasonic generator, and the ultrasonic generator is connected to the controller.

8. The off-set preventing positioning and sewing device for mask processing according to any one of claims 5-7, wherein, A grating ruler (30) is provided on the top of the connecting beam (19) and the support beam (21). The grating ruler (30) is connected to the controller. The two grating rulers (30) are parallel to the second linear drive module (18) respectively, and the reading heads of the two grating rulers (30) are connected to the L-shaped frame (17) and the connecting beam (19) respectively.

9. The shift preventing mask processing positioning sewing device according to claim 1, wherein The tablet (2) has a porous structure.

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