Mask ear band line welding device

Abstract

A mask ear band line welding device relates to the technical field of mask production equipment and comprises a welding table, a lifting plate is vertically arranged at the top of the welding table in a lifting mode, a middle pressing plate is detachably arranged at the bottom of the lifting plate, and a first transverse cylindrical linear sliding rail is detachably arranged at the top of the middle pressing plate. Two first transverse sliding blocks are arranged on the first transverse cylindrical linear sliding rail in a sliding and sleeving mode, first longitudinal cylindrical linear sliding rails are detachably arranged at the opposite ends of the first transverse sliding blocks, first longitudinal sliding blocks are arranged on the first longitudinal cylindrical linear sliding rails in a sliding and sleeving mode, and corner pressing plates are detachably arranged at the ends of the first longitudinal sliding blocks; one corner of the corner pressing plate is of an arc-shaped structure, the bottom face of the corner pressing plate is flush with the bottom face of the middle pressing plate, and a communicating groove is formed in the corner pressing plate. The problem that an existing mask ear band line welding device is low in ear band line welding position accuracy is solved. The problem of many derivation processes is solved; and the welding efficiency is low. And the universality is poor.

Description

Technical Field

[0001] The present invention relates to the technical field of mask production equipment, and particularly to a mask ear strap welding device. Background Art

[0002] When respiratory infectious diseases are prevalent or when working in an environment polluted by dust, etc., germs, dust, etc. in the air can enter the human lungs through breathing, causing serious damage to the body. Wearing a mask can play a certain filtering role. The mask fits tightly against the face, preventing germs, dust, etc. from leaking in easily. There are two ear straps on the mask, and the mask is fixed on the head by putting the ear straps on the ears.

[0003] When welding the ear straps of a mask, the commonly used methods are single-point welding and double-point welding. Single-point welding is to weld the four points where the ear strap contacts the mask one by one; double-point welding is to complete the welding of two points where an ear strap contacts the mask in one fusion welding, and complete the four welding points of a mask in two weldings.

[0004] During the use of the existing mask ear strap welding device, deficiencies have gradually emerged, mainly in the following aspects: First, the accuracy of the welding position of the ear strap is low. Specifically, when welding the ear strap, the operator first places one side of the mask under the ultrasonic welding head assembly, then the cut ear strap descends until its two ends contact the mask, then the ultrasonic welding head assembly descends and welds the ear strap to the mask, and finally the operator rotates the mask and welds the ear strap on the other side. When placing the mask, the operator adjusts the position of the mask by the relative position between the welding head of the ultrasonic welding head assembly and the edge of the mask. The placement method of the mask is very likely to cause deviation in the welding position, that is, the welding positions of the ear straps on both sides of the same mask and the ear straps of different masks are different, thus affecting the consistency and yield rate of the product.

[0005] Second, there are many derivative processes. Specifically, after the ultrasonic welding head assembly welds the ear strap to the mask, the welding head of the ultrasonic welding head assembly often adheres to the mask. When the ultrasonic welding head assembly resets, the operator needs to press the mask to separate it from the welding head. To prevent the ascending and descending ultrasonic welding head assembly from hurting the operator's palm, the operator needs to press the middle position of the mask. Therefore, when the ultrasonic welding head assembly resets, one side of the mask is lifted, and the nose bridge strip in the mask will be bent, resulting in the overall bending of the mask. After the mask is welded to the ear strap, the mask needs to be flattened. Therefore, the existing ear strap welding equipment has many derivative processes, which not only increases the production cost but also reduces the production efficiency.

[0006] Third, the welding efficiency is low. Specifically, when welding the ear strap line, one side of the mask is welded first, and then the position of the mask is adjusted to weld the other side of the mask. The welding operation is complex, which leads to low welding efficiency.

[0007] Fourth, the welding equipment has poor versatility. Specifically, the sizes of masks are divided into adult sizes and children's sizes, and the children's sizes are further divided into multiple types according to the applicable age, and the adult sizes are divided into multiple types according to the face shape. There are differences in the fixed positions of the ear strap lines of masks of different sizes, and the existing ear strap line welding equipment cannot be flexibly adjusted to adapt to masks of different specifications, resulting in the need to replace the corresponding welding equipment when switching production. This limitation increases the equipment investment cost.

[0008] In summary, it is obvious that there are inconveniences and defects in the actual use of the existing technology, so it is necessary to improve it. Summary of the Invention

[0009] Aiming at the defects in the existing technology, the technical problem to be solved by the present invention is to provide a mask ear strap line welding device, which can quickly and accurately position the mask, and the relative position deviation between the mask and the ear strap line is extremely small, effectively avoiding common problems such as offset and dislocation in traditional welding, improving the accuracy of the ear strap line welding position, and greatly improving the consistency and yield rate of the product; After the ear strap line is welded, the device can effectively avoid the problem that the mask is lifted by the welding head and the nose bridge strip is bent. During the welding process, the mask remains flat and no subsequent leveling treatment is required, reducing the derivative processes caused by deformation. This improvement not only reduces the production cost but also improves the production efficiency; The device can accurately weld two ear strap lines at one time when the mask is replaced, greatly improving the welding efficiency; The device can weld the ear strap lines of masks of different sizes. Through adjustable components, key parameters such as the positioning position, welding position, and pulling (cutting) line length can be adjusted to ensure that masks of various sizes can be accurately welded with the ear strap lines, greatly improving the versatility of the equipment.

[0010] To solve the above problems, the present invention provides the following technical solutions: A mask ear strap welding device includes a welding table. A lifting plate is vertically lifted and provided on the top of the welding table. A middle pressing plate is detachably provided at the bottom of the lifting plate. A first horizontal cylindrical linear slide rail is detachably provided at the top of the middle pressing plate. Two first horizontal sliders are slidably sleeved on the first horizontal cylindrical linear slide rail. First vertical cylindrical linear slide rails are detachably provided at the opposite ends of the first horizontal sliders. First vertical sliders are slidably sleeved on the first vertical cylindrical linear slide rails. A corner pressing plate is detachably provided at the end of the first vertical slider. One of the corners of the corner pressing plate is an arc structure. The bottom surface of the corner pressing plate is flush with the bottom surface of the middle pressing plate. A communication groove is provided inside the corner pressing plate. A plurality of through holes communicating with the communication groove are provided at the bottom of the corner pressing plate. The communication groove is communicated with an external negative pressure air source. Welding components and wire pulling components are provided at both positions on the top of the welding table on both sides of the lifting plate.

[0011] As an optimized solution, the welding component includes an adjusting plate vertically lifted and provided. A second horizontal cylindrical linear slide rail is detachably provided at the bottom of the adjusting plate. Second horizontal sliders are slidably sleeved on the second horizontal cylindrical linear slide rail. Second vertical cylindrical linear slide rails are detachably provided at the opposite ends of the second horizontal sliders. Second vertical sliders are slidably sleeved on the second vertical cylindrical linear slide rails. A welding plate and a tangent plate are detachably provided at the end of the second vertical slider. An ultrasonic welding head component vertically lifted and provided and a welding pneumatic clamp rotatably provided along the plumb line are provided at the bottom of the welding plate. A cutting knife is vertically lifted and provided at the bottom of the tangent plate.

[0012] As an optimized solution, the wire pulling component includes two third horizontal cylindrical linear slide rails detachably connected to the welding table. The two third horizontal cylindrical linear slide rails are respectively located on both sides of the adjusting plate. Third horizontal sliders are slidably sleeved on the third horizontal cylindrical linear slide rail. A first mounting plate and a second mounting plate are respectively detachably provided at the tops of the two third horizontal sliders. A wire pulling pneumatic clamp is horizontally moved and provided at the end of the first mounting plate. An L-shaped plate is horizontally moved and provided at the end of the second mounting plate. A wire clamping pneumatic clamp detachably provided and a wire threading pipe fixedly provided are provided at the top of the L-shaped plate. A wire threading hole is provided through the end of the second mounting plate.

[0013] As an optimized solution, scale lines are engraved on the first horizontal cylindrical linear slide rail, the first vertical cylindrical linear slide rail, the second horizontal cylindrical linear slide rail, the second vertical cylindrical linear slide rail and the third horizontal cylindrical linear slide rail. Stop bolts threadedly connected thereto are provided on the first horizontal slider, the first vertical slider, the second horizontal slider, the second vertical slider and the third horizontal slider.

[0014] As an optimized solution, a first vertical plate and two second vertical plates are fixedly arranged on the top of the welding table. The lifting plate and the adjusting plate are vertically and slidably connected to the first vertical plate and the second vertical plates correspondingly. A first lifting telescopic cylinder and two second lifting telescopic cylinders are fixedly arranged on the top of the welding table. The telescopic ends of the first lifting telescopic cylinder and the second lifting telescopic cylinders are fixedly connected to the lifting plate and the adjusting plate correspondingly.

[0015] As an optimized solution, the first longitudinal cylindrical linear slide rail and the second longitudinal cylindrical linear slide rail are detachably connected to the first transverse slider and the second transverse slider through a first support plate and a second support plate correspondingly.

[0016] As an optimized solution, the middle pressing plate is detachably connected to the lifting plate through two connecting plates, and the corner pressing plate is detachably connected to the first longitudinal slider through a positioning plate.

[0017] As an optimized solution, a multi-pipeline air exhaust is fixedly arranged at the bottom of the lifting plate. One port of the multi-pipeline air exhaust is communicated with an external negative pressure air source, and the remaining ports of the multi-pipeline air exhaust are all communicated with a communication groove in the corner pressing plate through air pipes.

[0018] As an optimized solution, a driving motor and an electric control telescopic cylinder are fixedly arranged on the top of the welding plate. The output end of the driving motor and the telescopic end of the electric control telescopic cylinder both pass through the welding plate and are detachably connected to a welding pneumatic gripper and an ultrasonic welding head assembly correspondingly. A driving telescopic cylinder is fixedly arranged on the top of the tangent plate. The telescopic end of the driving telescopic cylinder passes through the tangent plate and is detachably connected to a cutting knife.

[0019] As an optimized solution, a control telescopic cylinder and a pneumatic telescopic cylinder are fixedly arranged at the end parts of the first mounting plate and the second mounting plate respectively. The telescopic ends of the control telescopic cylinder and the pneumatic telescopic cylinder pass through the first mounting plate and the second mounting plate respectively and are fixedly connected to a wire-pulling pneumatic gripper and an L-shaped plate correspondingly.

[0020] Compared with the prior art, the beneficial effects of the present invention are: 1. When welding the ear strap line, the first lifting telescopic cylinder drives the lifting plate to slide upward until the middle pressing plate and the corner pressing plates rise to the preset height. The operator places the mask at the bottom of the middle pressing plate. Under negative pressure suction, the four corners of the mask are respectively adsorbed at the bottom of the four corner pressing plates. Adjust the position of the mask so that two of its sides are flush with the side walls on the left and right sides of the arc structure of one of the corner pressing plates. Then the lifting plate resets, and the middle pressing plate and the corner pressing plates press the mask against the top of the welding table. Thus, the positioning of the mask is completed. During the positioning of the mask, control the telescopic cylinder to drive the wire-pulling pneumatic gripper to move to a position close to the wire-clamping pneumatic gripper. The wire-pulling pneumatic gripper clamps the end of the ear strap line, the wire-clamping pneumatic gripper releases the restriction on the ear strap line, the wire-pulling pneumatic gripper holding one end of the ear strap line resets, and the wire-clamping pneumatic gripper clamps and restricts the ear strap line again. The second lifting telescopic cylinder drives the adjusting plate to slide downward until the pulled ear strap line enters the clamping range of the welding pneumatic gripper. The two welding pneumatic grippers clamp the ear strap line, the driving telescopic cylinder drives the cutting knife to move downward and cuts the ear strap line. Then the two driving motors respectively drive the two welding pneumatic grippers to rotate until both ends of the ear strap line are located below the ultrasonic welding head assembly. The adjusting plate moves downward until the end of the ear strap line enters the arc structure of the corner pressing plate and approaches the mask. The electric control telescopic cylinder drives the ultrasonic welding head assembly to move downward, and the welding head of the ultrasonic welding head assembly enters the arc structure of the corner pressing plate and welds the ear strap line to the mask. Through the corner pressing plate and the middle pressing plate, the mask can be positioned quickly and accurately. The relative position deviation between the mask and the ear strap line is extremely small, effectively avoiding common problems such as offset and dislocation in traditional welding, improving the accuracy of the welding position of the ear strap line, and greatly increasing the consistency and yield rate of the product; 2. After welding is completed, the adjusting plate resets. When the welding head of the ultrasonic welding head assembly separates from the position where it adheres to the mask during the upward movement under the pressing of the middle pressing plate and the corner pressing plates, only a small part of the mask corner is lifted. Therefore, this device can effectively avoid the problem that the nose bridge strip is bent due to the mask being lifted by the welding head after the ear strap line is welded. During the welding process, the mask remains flat and does not require subsequent leveling treatment, reducing the derived processes caused by mask deformation. This improvement not only reduces the production cost but also improves the production efficiency; 3. This device can accurately weld two ear strap lines at one time, reducing the operation of replacing the mask and greatly improving the welding efficiency; 4. When welding masks of different sizes, turn the stop bolt to release the fixation, move the first horizontal slider, the first vertical slider, the second horizontal slider, the second vertical slider and the third horizontal slider to the corresponding scale line positions, then turn the stop bolt to fix them. By adjusting the positions of the first horizontal slider and the first vertical slider, the positions of the four corner pressing plates can be adjusted, so that masks of different sizes can be positioned. By adjusting the second horizontal slider and the second vertical slider, the positions of the cutting knife and the ultrasonic welding head assembly can be adjusted, so that ear strap lines of different lengths can be intercepted and masks of different sizes can be welded. By adjusting the position of the third horizontal slider, the position of the ear strap line can be adaptively adjusted. By adjusting the pneumatic telescopic cylinder and controlling the telescopic amount of the telescopic cylinder, the pulling length of the ear strap line can be adjusted. This device can weld ear strap lines for masks of different sizes. Through the adjustable components, key parameters such as the positioning position, the welding position, and the pulling (cutting) line length can be adjusted to ensure that masks of various sizes can be accurately welded with the ear strap lines, greatly improving the versatility of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. In all the drawings, similar elements or parts are generally denoted by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0022] Figure 1 is a schematic structural diagram of the present invention; Figure 2 is a schematic structural diagram between the middle pressing plate and the lifting plate of the present invention; Figure 3 is a schematic structural diagram of the top of the middle pressing plate of the present invention; Figure 4 is a schematic structural diagram of the corner pressing plate of the present invention; Figure 5 is a schematic structural diagram of the welding assembly of the present invention; Figure 6 is a schematic structural diagram of the top and bottom of the welding plate of the present invention; Figure 7 is a schematic structural diagram of the top and bottom of the tangent plate of the present invention; Figure 8 is a schematic structural diagram of the bottom of the adjusting plate of the present invention; Figure 9 is a schematic structural diagram of both ends of the first mounting plate of the present invention; Figure 10 is a schematic structural diagram of both ends of the second mounting plate of the present invention; Figure 11 is a schematic structural diagram of the stop bolt of the present invention; Figure 12 This is a schematic structural diagram of the bottom of the lifting plate of the present invention.

[0023] In the figure: 1 - welding table; 2 - welding assembly; 3 - lifting plate; 4 - wire pulling assembly; 5 - first vertical plate; 6 - ventilation pipe; 7 - first lifting telescopic cylinder; 8 - first horizontal cylindrical linear slide rail; 9 - first horizontal slider; 10 - corner pressing plate; 11 - positioning plate; 12 - first longitudinal slider; 13 - first longitudinal cylindrical linear slide rail; 14 - first support plate; 15 - middle pressing plate; 16 - scale line; 17 - connecting plate; 18 - multi - pipeline air row; 19 - through hole; 20 - communication groove; 21 - stop bolt; 22 - second support plate; 23 - second longitudinal cylindrical linear slide rail; 24 - second longitudinal slider; 25 - tangent plate; 26 - welding plate; 27 - second horizontal cylindrical linear slide rail; 28 - second horizontal slider; 29 - adjusting plate; 30 - second vertical plate; 31 - second lifting telescopic cylinder; 32 - cutting knife; 33 - driving telescopic cylinder; 34 - welding pneumatic gripper; 35 - driving motor; 36 - electric control telescopic cylinder; 37 - ultrasonic welding head assembly; 38 - third horizontal cylindrical linear slide rail; 39 - third horizontal slider; 40 - wire pulling pneumatic gripper; 41 - first mounting plate; 42 - control telescopic cylinder; 43 - wire passing hole; 44 - pneumatic telescopic cylinder; 45 - second mounting plate; 46 - wire passing pipe; 47 - L - shaped plate; 48 - wire clamping pneumatic gripper. Specific embodiments

[0024] Hereinafter, embodiments of the technical solution of the present invention will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, so they are only examples and cannot be used to limit the protection scope of the present invention.

[0025] As Figures 1 to 12 shown, a mask ear - strap welding device includes a welding table 1. A lifting plate 3 is vertically lifted on the top of the welding table 1. A middle pressing plate 15 is detachably arranged at the bottom of the lifting plate 3. A first horizontal cylindrical linear slide rail 8 is detachably arranged on the top of the middle pressing plate 15. Two first horizontal sliders 9 are slidably sleeved on the first horizontal cylindrical linear slide rail 8. Removably arranged first longitudinal cylindrical linear slide rails 13 are provided at the opposite ends of the first horizontal sliders 9. A first longitudinal slider 12 is slidably sleeved on the first longitudinal cylindrical linear slide rail 13. A corner pressing plate 10 is detachably arranged at the end of the first longitudinal slider 12. One of the corners of the corner pressing plate 10 is an arc - shaped structure. The bottom surface of the corner pressing plate 10 is flush with the bottom surface of the middle pressing plate 15. A communication groove 20 is arranged inside the corner pressing plate 10. A plurality of through holes 19 communicating with the communication groove 20 are arranged at the bottom of the corner pressing plate 10. The communication groove 20 is communicated with an external negative - pressure air source. Welding assemblies 2 and wire pulling assemblies 4 are arranged at both positions on the top of the welding table 1 on both sides of the lifting plate 3.

[0026] The welding assembly 2 includes an adjusting plate 29 arranged vertically and capable of lifting. A second horizontal cylindrical linear slide rail 27 is detachably provided at the bottom of the adjusting plate 29. A second horizontal slider 28 is slidably sleeved on the second horizontal cylindrical linear slide rail 27. Second vertical cylindrical linear slide rails 23 are detachably provided at the opposite ends of the second horizontal slider 28. Second vertical sliders 24 are slidably sleeved on the second vertical cylindrical linear slide rails 23. A welding plate 26 and a tangent plate 25 are detachably provided at the ends of the second vertical sliders 24. An ultrasonic welding head assembly 37 arranged vertically and capable of lifting and a welding pneumatic gripper 34 rotatable along the plumb line are provided at the bottom of the welding plate 26. A cutting knife 32 is arranged vertically and capable of lifting at the bottom of the tangent plate 25.

[0027] The wire pulling assembly 4 includes two third horizontal cylindrical linear slide rails 38 detachably connected to the welding table 1. The two third horizontal cylindrical linear slide rails 38 are respectively located on both sides of the adjusting plate 29. A third horizontal slider 39 is slidably sleeved on the third horizontal cylindrical linear slide rail 38. A first mounting plate 41 and a second mounting plate 45 are respectively detachably provided at the tops of the two third horizontal sliders 39. A wire pulling pneumatic gripper 40 is horizontally movable at the end of the first mounting plate 41. An L-shaped plate 47 is horizontally movable at the end of the second mounting plate 45. A wire clamping pneumatic gripper 48 and a fixed threading pipe 46 are detachably provided at the top of the L-shaped plate 47. A threading hole 43 is provided through the end of the second mounting plate 45.

[0028] Scale lines 16 are engraved on the first horizontal cylindrical linear slide rail 8, the first vertical cylindrical linear slide rail 13, the second horizontal cylindrical linear slide rail 27, the second vertical cylindrical linear slide rail 23 and the third horizontal cylindrical linear slide rail 38. Each scale line 16 corresponds to masks of different sizes. Position-limiting bolts 21 threadedly connected thereto are provided on the first horizontal slider 9, the first vertical slider 12, the second horizontal slider 28, the second vertical slider 24 and the third horizontal slider 39.

[0029] A first vertical plate 5 and two second vertical plates 30 are fixedly provided at the top of the welding table 1. The lifting plate 3 and the adjusting plate 29 are respectively vertically slidably connected to the first vertical plate 5 and the second vertical plates 30. A first lifting telescopic cylinder 7 and two second lifting telescopic cylinders 31 are fixedly provided at the top of the welding table 1. The telescopic ends of the first lifting telescopic cylinder 7 and the second lifting telescopic cylinders 31 are respectively fixedly connected to the lifting plate 3 and the adjusting plate 29.

[0030] The first vertical cylindrical linear slide rail 13 and the second vertical cylindrical linear slide rail 23 are respectively detachably connected to the first horizontal slider 9 and the second horizontal slider 28 through a first support plate 14 and a second support plate 22.

[0031] The middle pressing plate 15 is detachably connected to the lifting plate 3 through two connecting plates 17. The corner pressing plate 10 is detachably connected to the first vertical slider 12 through a positioning plate 11.

[0032] A multi-pipeline air exhaust 18 is fixedly provided at the bottom of the lifting plate 3. One port of the multi-pipeline air exhaust 18 is communicated with an external negative pressure air source, and the remaining ports of the multi-pipeline air exhaust 18 are all communicated with a communication groove 20 inside the corner pressing plate 10 through a ventilation pipe 6.

[0033] A driving motor 35 and an electric control telescopic cylinder 36 are fixedly provided at the top of the welding plate 26. The output end of the driving motor 35 and the telescopic end of the electric control telescopic cylinder 36 both pass through the welding plate 26 and are detachably connected to a welding pneumatic gripper 34 and an ultrasonic welding head assembly 37 respectively. A driving telescopic cylinder 33 is fixedly provided at the top of the tangent plate 25. The telescopic end of the driving telescopic cylinder 33 passes through the tangent plate 25 and is detachably connected to a cutting knife 32.

[0034] The ultrasonic welding head assembly 37 mainly includes a transducer, a horn and a welding head. The transducer is electrically connected to an external ultrasonic generator.

[0035] Control telescopic cylinders 42 and pneumatic telescopic cylinders 44 are fixedly provided at the end parts of a first mounting plate 41 and a second mounting plate 45 respectively. The telescopic ends of the control telescopic cylinder 42 and the pneumatic telescopic cylinder 44 pass through the first mounting plate 41 and the second mounting plate 45 respectively and are fixedly connected to a wire-pulling pneumatic gripper 40 and an L-shaped plate 47 respectively.

[0036] The working principle of this device is as follows: When welding the ear strap lines, the first lifting telescopic cylinder 7 drives the lifting plate 3 to slide upward until the middle pressing plate 15 and the corner pressing plates 10 rise to a preset height. The operator places the mask at the bottom of the middle pressing plate 15. Under negative pressure suction, the four corners of the mask are respectively adsorbed at the bottoms of the four corner pressing plates 10. The position of the mask is adjusted so that two of its sides are flush with the side walls on the left and right sides of the arc structure of one of the corner pressing plates 10. Then the lifting plate 3 resets, and the middle pressing plate 15 and the corner pressing plates 10 press the mask against the top of the welding table 1. Thus, the positioning of the mask is completed. During the positioning of the mask, the control telescopic cylinder 42 drives the wire-pulling pneumatic gripper 40 to move to a position close to the wire-clamping pneumatic gripper 48. The wire-pulling pneumatic gripper 40 clamps the end of the ear strap line, and the wire-clamping pneumatic gripper 48 releases the restriction on the ear strap line. The wire-pulling pneumatic gripper 40 holding one end of the ear strap line resets, and the wire-clamping pneumatic gripper 48 clamps and restricts the ear strap line again. The second lifting telescopic cylinder 31 drives the adjusting plate 29 to slide downward until the pulled-out ear strap line enters the clamping range of the welding pneumatic grippers 34. The two welding pneumatic grippers 34 clamp the ear strap line, and the driving telescopic cylinder 33 drives the cutting knife 32 to move downward and cut the ear strap line. Then the two driving motors 35 respectively drive the two welding pneumatic grippers 34 to rotate until both ends of the ear strap line are located below the ultrasonic welding head assembly 37. The adjusting plate 29 moves downward until the end of the ear strap line enters the arc structure of the corner pressing plate 10 and approaches the mask. The electric control telescopic cylinder 36 drives the ultrasonic welding head assembly 37 to move downward, and the welding head of the ultrasonic welding head assembly 37 enters the arc structure of the corner pressing plate 10 and welds the ear strap line to the mask. Through the corner pressing plates 10 and the middle pressing plate 15, the mask can be quickly and accurately positioned. The relative position deviation between the mask and the ear strap line is extremely small, effectively avoiding common problems such as offset and dislocation in traditional welding, improving the accuracy of the welding position of the ear strap line, and greatly increasing the consistency and yield rate of the product; After the welding is completed, the adjusting plate 29 resets. Under the pressing of the middle pressing plate 15 and the corner pressing plates 10, when the welding head of the ultrasonic welding head assembly 37 separates from the position adhered to the mask during the upward movement, only a small part of the corner of the mask is lifted. Therefore, this device can effectively avoid the problem that the mask is lifted by the welding head and causes the nose bridge strip to bend after the ear strap line is welded. During the welding process, the mask remains flat and does not require subsequent leveling treatment, reducing the derivative processes caused by mask deformation. This improvement not only reduces the production cost but also improves the production efficiency; This device can accurately weld two ear strap lines at one time, reducing the operation of replacing the mask and greatly improving the welding efficiency; When welding masks of different sizes, turn the stop bolt 21 to release the fixation, move the first horizontal slider 9, the first vertical slider 12, the second horizontal slider 28, the second vertical slider 24 and the third horizontal slider 39 to the corresponding scale line 16 position, and turn the stop bolt 21 to fix. By adjusting the positions of the first horizontal slider 9 and the first vertical slider 12, the positions of the four corner pressing plates 10 can be adjusted, so that masks of different sizes can be positioned. By adjusting the second horizontal slider 28 and the second vertical slider 24, the positions of the cutting knife 32 and the ultrasonic welding head assembly 37 can be adjusted, so that earloop wires of different lengths can be intercepted and masks of different sizes can be welded. By adjusting the position of the third horizontal slider 39, the position of the earloop wire can be adaptively adjusted. By adjusting the telescopic amounts of the pneumatic telescopic cylinder 44 and the control telescopic cylinder 42, the pulling length of the earloop wire can be adjusted. This device can weld earloop wires to masks of different sizes. Through the adjustable components, key parameters such as the positioning position, welding position, and pulling (cutting) wire length can be adjusted to ensure that masks of various sizes can be precisely welded to the earloop wires, greatly improving the versatility of the equipment.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered by the scope of the claims and the description of the present invention.

Claims

1. A mask ear strap welding device, characterized in that: The welding platform (1) comprises a welding table (1), wherein a lifting plate (3) is provided on the top of the welding table (1) for vertical lifting, a middle pressure plate (15) is detachably provided on the bottom of the lifting plate (3), a first transverse cylindrical linear slide rail (8) is detachably provided on the top of the middle pressure plate (15), two first transverse sliders (9) are provided on the sliding sleeve of the first transverse cylindrical linear slide rail (8), opposite ends of the first transverse sliders (9) are provided with detachably provided first longitudinal cylindrical linear slide rails (13), and a first longitudinal slider (12) is provided on the sliding sleeve of the first longitudinal cylindrical linear slide rail (13). A corner pressure plate (10) is detachably provided at the end of the first longitudinal slider (12), one of the corners of the corner pressure plate (10) being an arc-shaped structure, the bottom surface of the corner pressure plate (10) being flush with the bottom surface of the middle pressure plate (15), a connecting groove (20) being provided inside the corner pressure plate (10), a plurality of through holes (19) being provided at the bottom of the corner pressure plate (10) being connected to the connecting groove (20), the connecting groove (20) being connected to an external negative pressure gas source, and a welding assembly (2) and a wire drawing assembly (4) being provided at the top of the welding platform (1) at both sides of the lifting plate (3).

2. A mask ear strap welding device according to claim 1, characterized in that: The welding assembly (2) comprises an adjustment plate (29) arranged to be lifted vertically, a second transverse cylindrical linear slide rail (27) being detachably provided at the bottom of the adjustment plate (29), a second transverse slider (28) being slidably sleeved on the second transverse cylindrical linear slide rail (27), opposite ends of the second transverse slider (28) being detachably provided with a second longitudinal cylindrical linear slide rail (23), a second longitudinal slider (24) being slidably sleeved on the second longitudinal cylindrical linear slide rail (23), a welding plate (26) and a tangent plate (25) being detachably provided at the end of the second longitudinal slider (24), an ultrasonic welding head assembly (37) being arranged to be lifted vertically and a welding pneumatic clamp (34) being rotatably provided along a plumb line being provided at the bottom of the welding plate (26), and a cutting knife (32) being vertically lifted at the bottom of the tangent plate (25).

3. A mask ear strap welding device according to claim 2, characterized in that: The wire pulling assembly (4) comprises two third transverse cylindrical linear guide rails (38) detachably connected to the welding table (1), the two third transverse cylindrical linear guide rails (38) being respectively located on both sides of the adjusting plate (29), the third transverse cylindrical linear guide rail (38) being slidably sleeved with a third transverse slider (39), the tops of the two third transverse sliders (39) being respectively provided with a detachably arranged first mounting plate (41) and a second mounting plate (45), the end of the first mounting plate (41) being provided with a wire pulling pneumatic clamp (40) for horizontal movement, the end of the second mounting plate (45) being provided with a horizontally movable L-shaped plate (47), the top of the L-shaped plate (47) being provided with a detachably arranged wire clamping pneumatic clamp (48) and a fixedly arranged wire threading tube (46), the end of the second mounting plate (45) being provided with a wire threading hole (43) through it.

4. A mask ear strap welding device according to claim 3, characterized in that: The first transverse cylindrical linear slide rail (8), the first longitudinal cylindrical linear slide rail (13), the second transverse cylindrical linear slide rail (27), the second longitudinal cylindrical linear slide rail (23) and the third transverse cylindrical linear slide rail (38) are all engraved with scale lines (16), and the first transverse slider (9), the first longitudinal slider (12), the second transverse slider (28), the second longitudinal slider (24) and the third transverse slider (39) are all provided with stop bolts (21) threadedly connected thereto.

5. A mask ear strap welding device according to claim 2, characterized in that: A first vertical plate (5) and two second vertical plates (30) are fixedly provided on the top of the welding platform (1); the lifting plate (3) and the adjusting plate (29) are vertically slidably connected to the first vertical plate (5) and the second vertical plate (30) respectively; a first lifting and telescopic cylinder (7) and two second lifting and telescopic cylinders (31) are fixedly provided on the top of the welding platform (1); the telescopic ends of the first lifting and telescopic cylinder (7) and the second lifting and telescopic cylinder (31) are fixedly connected to the lifting plate (3) and the adjusting plate (29) respectively.

6. A mask ear strap welding device according to claim 2, characterized in that: The first longitudinal cylindrical linear slide rail (13) and the second longitudinal cylindrical linear slide rail (23) are detachably connected to the first transverse slide block (9) and the second transverse slide block (28) via the first support plate (14) and the second support plate (22), respectively.

7. A mask ear strap welding device according to claim 1, characterized in that: The middle pressing plate (15) is detachably connected to the lifting plate (3) via two connecting plates (17), and the corner pressing plate (10) is detachably connected to the first longitudinal sliding block (12) via a positioning plate (11).

8. A mask ear strap welding device according to claim 1, characterized in that: A multi-pipeline air exhaust (18) is fixedly provided at the bottom of the lifting plate (3), one port of the multi-pipeline air exhaust (18) is connected to an external negative pressure air source, and the remaining ports of the multi-pipeline air exhaust (18) are connected to the connecting groove (20) in the corner pressure plate (10) through the ventilation pipe (6).

9. A mask ear strap welding device according to claim 2, characterized in that: A driving motor (35) and an electrically controlled telescopic cylinder (36) are fixedly provided on the top of the welding plate (26); the output end of the driving motor (35) and the telescopic end of the electrically controlled telescopic cylinder (36) both pass through the welding plate (26) and are detachably connected to the welding pneumatic clamp (34) and the ultrasonic welding head assembly (37); a driving telescopic cylinder (33) is fixedly provided on the top of the cutting plate (25); the telescopic end of the driving telescopic cylinder (33) passes through the cutting plate (25) and is detachably connected to the cutting knife (32).

10. A mask ear strap welding device according to claim 3, characterized in that: A control telescopic cylinder (42) and a pneumatic telescopic cylinder (44) are fixedly mounted on the ends of the first mounting plate (41) and the second mounting plate (45), respectively. The telescopic ends of the control telescopic cylinder (42) and the pneumatic telescopic cylinder (44) pass through the first mounting plate (41) and the second mounting plate (45), respectively, and are fixedly connected to the wire pulling pneumatic clamp (40) and the L-shaped plate (47) respectively.

Images