Continuous ear wire welding equipment, welding method and mask production line for mask production

Abstract

The invention discloses a continuous ear wire welding device, a welding method and a mask production line for mask production; the continuous ear wire welding device for mask production comprises a frame, a mask conveying device, an ear wire conveying device and a welding device; the welding device comprises a rotating shaft, a welding module and a first rotating drive mechanism; the welding module comprises an ultrasonic welding head and a pressing head; the ear wire conveying device comprises an ear wire conveying mechanism and an ear wire clamping conveying mechanism, the ear wire clamping conveying mechanism is divided into two groups, respectively located on both sides of the welding device, each group of ear wire clamping conveying mechanism comprises a plurality of clamping mechanisms and an ear wire conveying driving mechanism; the clamping mechanism clamps the ear wire and moves synchronously with the mask strip. The continuous ear wire welding device for mask production of the present invention can realize the synchronous conveying of the mask and the ear wire, so that the mask does not need to stay at the ear wire welding station, thereby greatly improving the production efficiency of the mask.

Description

Technical Field

[0001] The invention relates to mask production equipment, and in particular to continuous ear wire welding equipment, a welding method and a mask production line for mask production. Background Art

[0002] A mask is a sanitary product, generally refers to a device worn on the mouth and nose to filter the air entering the mouth and nose, so as to block harmful gases, odors, and droplets from entering and exiting the wearer's mouth and nose. It is made of gauze or paper. The mask has a certain filtering effect on the air entering the lungs. When respiratory infectious diseases are prevalent or when working in an environment polluted by dust, wearing a mask is very effective.

[0003] The existing mask production adopts an automated production process, which can increase the production speed of masks. For example, the utility model patent with the authorization announcement number CN209121339U discloses "a mask production line", which includes a workbench, and a nose bridge strip feeding device, a first sealing and cutting device, a folding device, a second sealing and cutting device, a flipping device, a limit device and an ear strap welding device installed on the workbench and arranged in sequence along the movement direction of the fabric belt. Through the above-mentioned mask production line, the automated production of masks is realized. In addition, the invention patent application with the application publication number CN108433215A discloses "a fully automatic mask production line", which includes a frame, a mask fabric edge sealing device, a mask surface folding device, a mask transverse sealing and cutting device and an ear strap welding device. The mask fabric edge sealing device, the mask surface folding device, the mask transverse sealing and cutting device and the ear strap welding device are installed on the frame from front to back in sequence. Through this fully automatic mask production line, the automated production of masks can also be realized.

[0004] However, the above-mentioned fully automatic mask production line and mask production line have the following shortcomings:

[0005] In the process of ear wire welding of the above-mentioned fully automatic mask production line and mask production line, when the mask moves to the ear wire welding station through the mask conveying mechanism, the mask conveying mechanism stops driving, so that the mask stays at the ear wire welding station for a period of time. During this period of time, the ear wire conveying mechanism clamps the ear wire and delivers it to the corresponding position of the mask. Then, the ear wire welding module works to weld the ear wire to the mask to complete the ear wire welding process. In the above process, since the mask needs to stay for a period of time after arriving at the ear wire welding station, waiting for the ear wire conveying mechanism to clamp the ear wire and deliver it to the corresponding position in the mask, the ear wire welding mechanism can work, which will reduce the speed of ear wire welding, thereby reducing the efficiency of individual mask production. Summary of the invention

[0006] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a continuous ear wire welding device for mask production. The continuous ear wire welding device for mask production can realize the synchronous conveying of the mask and the ear wire, and realize welding during the conveying process, so that the mask does not need to stay at the ear wire welding station, thereby greatly improving the production efficiency of the mask.

[0007] The second object of the present invention is to provide a welding method for ear wire continuous welding equipment used in mask production. The method can realize welding of masks and ear wires during the conveying process, thereby greatly improving the production efficiency of masks.

[0008] The third object of the present invention is to provide a mask production line.

[0009] The technical solution of the present invention to solve the above technical problems is:

[0010] A continuous ear wire welding device for mask production comprises a frame, a mask conveying device arranged on the frame, an ear wire conveying device, and a welding device for welding the ear wire conveyed by the ear wire conveying device to the mask, wherein:

[0011] The welding device comprises a rotating shaft, a welding module and a first rotating driving mechanism for driving the rotating shaft to rotate, wherein the welding module comprises an ultrasonic welding head arranged on a frame and a pressing head arranged on the rotating shaft, wherein the ultrasonic welding head is located below the rotating shaft;

[0012] The ear wire conveying device comprises an ear wire conveying mechanism and an ear wire clamping and conveying mechanism for clamping the ear wire conveyed by the ear wire conveying mechanism and conveying it to the ultrasonic welding head synchronously with the mask strip, wherein the ear wire clamping and conveying mechanism comprises two groups, which are respectively located on both sides of the welding device, and each group of ear wire clamping and conveying mechanism comprises a plurality of clamping mechanisms for clamping the ear wires and an ear wire conveying driving mechanism for driving the clamping mechanisms to cyclically move so as to cause the ear wires to move synchronously with the mask strip;

[0013] The mask strip passes between the rotating shaft and the ultrasonic welding head, and the ear wires clamped by the wire clamping mechanism are located on the upper side of the mask strip; the ear wire conveying drive mechanism drives multiple wire clamping mechanisms to clamp the ear wires and the mask strip for synchronous movement, and when the pressing head rotates with the rotating shaft to a position corresponding to the ultrasonic welding head, they cooperate with each other to weld the mask strip and the ear wires together.

[0014] Preferably, the welding device further comprises a cutting module for cutting the mask strip, and the cutting module comprises a cutting blade arranged on a rotating shaft; the cutting blade extends along the axial direction of the rotating shaft.

[0015] Preferably, the pressing heads are in two groups and are respectively located on both sides of the cutting blade and extend along the axial direction of the rotating shaft.

[0016] Preferably, the pressing head and the cutting blade are an integrated structure; the first rotary drive mechanism drives the pressing head and the cutting blade on the rotating shaft to move synchronously with the mask strip, and when the pressing head and the cutting blade reach the ultrasonic welding head, the pressing head welds the end of the mask and the ear wire, and the cutting blade cuts off the mask strip and the ear wire.

[0017] Preferably, a mounting groove is provided on the rotating shaft at a position corresponding to the pressing head and the cutting blade, and the mounting groove extends along the axial direction of the rotating shaft; the pressing head and the cutting blade are installed in the mounting groove, and the pressing head and the cutting blade are two groups and are arranged at 180 degrees; wherein the widths of the cutting blade and the pressing head are both greater than or equal to the width or length of the mask; the pressing head is provided with a pressing portion arranged in a matrix, and the ultrasonic welding head is provided with an avoidance hole cooperating with the pressing portion at a position corresponding to the pressing portion.

[0018] Preferably, the first rotational drive mechanism includes a first rotational drive motor and a synchronous transmission mechanism, wherein the first rotational drive motor is mounted on a frame; the synchronous transmission mechanism includes a driving pulley arranged on a main shaft of the first rotational drive motor, a driven pulley arranged on a rotating shaft, and a transmission belt wrapped around the driving pulley and the driven pulley.

[0019] Preferably, the ear wire conveying mechanism includes a first conveying roller, a second conveying roller and a second rotating drive mechanism for driving the first conveying roller or the second conveying roller to rotate, wherein the first conveying roller and the second conveying roller are meshed with each other, and the ear wire passes between the first conveying roller and the second conveying roller.

[0020] Preferably, a positioning rod is provided on the frame above the first conveying roller and the second conveying roller, the positioning rod is parallel to the axial direction of the first conveying roller and the second conveying roller, and positioning holes are provided on the positioning rod at positions corresponding to the two ear wire clamping and conveying mechanisms, and the ear wire passes through the positioning hole and enters between the first conveying roller and the second conveying roller.

[0021] Preferably, a guide wheel group for guiding the ear wire is arranged below the first conveying roller and the second conveying roller, wherein the guide wheel group includes a guide rod and a guide wheel arranged on the guide rod, wherein the guide rod is rotatably connected to the frame; the guide wheels are in two groups, and each group of guide wheels corresponds one-to-one to the positioning holes on the positioning rod; each guide wheel is provided with a guide groove cooperating with the ear wire, and the guide groove extends along the circumferential direction of the guide wheel; the clamping part in the wire clamping mechanism, the guide groove on the corresponding guide wheel and the corresponding positioning hole in the positioning rod are in the same vertical plane; the ear wire bypasses the guide groove on the corresponding guide wheel after coming out of the first conveying roller and the second conveying roller.

[0022] Preferably, the ear wire conveying drive mechanism comprises a conveyor belt and a synchronous drive mechanism for driving the conveyor belt to circulate, wherein the plurality of wire clamping mechanisms are arranged at equal distances along the circling direction of the conveyor belt.

[0023] Preferably, the ear wire clamping and conveying mechanism also includes a clamping drive mechanism for driving the clamping mechanism to clamp or loosen the ear wire, wherein the clamping mechanism includes a sleeve and a connecting rod arranged in the sleeve, wherein the sleeve is installed on the conveyor belt, and the axial direction of the sleeve is parallel to the width direction of the conveyor belt; the connecting rod is coaxially arranged with the sleeve, and guide holes matching the connecting rod are arranged on both sides of the sleeve, and a cavity is arranged inside the sleeve, and the diameter of the cavity is larger than the diameter of the guide hole; the end of the connecting rod close to the ultrasonic welding head passes through the sleeve and is connected to the clamping block The connecting rod is connected, and the diameter of the clamping block is larger than the diameter of the connecting rod; the clamping block and the corresponding end face in the sleeve constitute the clamping part of the wire clamping mechanism; the wire clamping mechanism also includes an elastic component for causing the clamping block on the connecting rod to fit with the corresponding end face in the sleeve, and the elastic component includes a first spring and a clamping block arranged in the cavity of the sleeve, wherein the clamping block is installed on the connecting rod and is located in the cavity; the first spring is sleeved on the connecting rod, and one end acts on the clamping block, and the other end acts on the inner wall of the sleeve near the ultrasonic welding head.

[0024] Preferably, the clamping drive mechanism includes a guide block arranged on the frame and a roller arranged on the connecting rod, wherein there are two guide blocks, wherein the guide block arranged at the corresponding position of the guide wheel group is an ear wire clamping guide block, and the guide block arranged at the position beyond the ultrasonic welding head is an ear wire releasing guide block; wherein the guide surface of the ear wire clamping guide block is inclined upward; the inclination direction of the guide surface of the ear wire releasing guide block is opposite to the conveying direction of the mask; the roller is rotatably connected to the end of the connecting rod away from the ultrasonic welding head, and the axial direction of the roller is perpendicular to the axial direction of the connecting rod.

[0025] The second preferred embodiment of the ear wire delivery drive mechanism, wherein:

[0026] Preferably, the ear wire conveying drive mechanism includes a rotating wheel arranged on the rotating shaft, and the multiple wire clamping mechanisms are installed on the rotating wheel; the rotating wheel is provided with a groove matching the ear wire, and the groove extends along the circumferential direction of the rotating wheel; the pressing head is installed on the outer circumferential surface of the rotating wheel, and is located behind the wire clamping mechanism along the rotation direction of the rotating wheel.

[0027] Preferably, the wire clamping mechanism includes a clamping rod embedded in the side of the rotating wheel away from the ultrasonic welding head, and the rotating wheel is provided with an avoidance groove at a position corresponding to the clamping rod, the avoidance groove is connected with the groove, the clamping rod is rotatably connected in the avoidance groove, and extends into the groove along the radial direction of the rotating wheel; the clamping rod and the side wall of the groove constitute the clamping part of the wire clamping mechanism; an elastic member is provided between the clamping rod and the rotating wheel, and the elastic force of the elastic member causes the clamping rod to fit with the side wall of the groove.

[0028] Preferably, the ear wire clamping and conveying mechanism also includes a clamping drive mechanism for driving the wire clamping mechanism to clamp and open, wherein the clamping drive mechanism includes a push block arranged on the frame, and the push blocks are divided into two groups, one group is arranged at the intersection of the ear wire conveying mechanism and the ear wire clamping and conveying mechanism, and the other group is arranged at a position beyond the ultrasonic welding head; wherein the push block extends horizontally, and an arc-shaped guide surface is arranged at a position corresponding to the clamping rod, and when the clamping rod is rotated to the end of the clamping rod away from the groove and contacts the guide surface on the push block; the clamping rod overcomes the elastic force of the elastic member and separates from the side wall of the groove.

[0029] Preferably, sliding mechanisms are provided at both ends of the rotating shaft and between the frame, and the sliding mechanisms include sliders provided on the rotating shaft and slide grooves provided on the frame, wherein both ends of the rotating shaft are rotatably connected to the sliders, and the sliders are installed on the slide grooves, and a second spring is provided at the lower end of the slider and the bottom of the slide groove, and one end of the second spring acts on the bottom of the slider, and the other end acts on the bottom of the slide groove.

[0030] Preferably, the wire clamping mechanism and the pressing head are in two groups, and are alternately arranged on the rotating wheel along the rotation direction of the rotating wheel.

[0031] A mask production line comprises continuous ear wire welding equipment for producing the above-mentioned masks.

[0032] A welding method for an ear wire continuous welding device for mask production, comprising the following steps:

[0033] (1) The mask conveying device moves the mask strips that have completed the compounding process and the nose bridge wire assembly process toward the ear wire welding station. At the same time, the ear wire conveying mechanism drives the ear wire to move toward the ear wire welding station;

[0034] (2) The ear wire conveying driving mechanism drives the multiple wire clamping mechanisms to move, and when the ear wire conveying mechanism conveys the ear wire to the intersection with the ear wire clamping conveying mechanism, the wire clamping mechanism located at the intersection clamps the ear wire in the ear wire conveying mechanism;

[0035] (3) The ear wire conveying drive mechanism drives the wire clamping mechanism to circulate, pulls the ear wire toward the direction of the ultrasonic welding head, and keeps synchronous movement with the mask strip; during this process, another wire clamping mechanism moves to the intersection position with the ear wire conveying mechanism and clamps the ear wire;

[0036] (4) The first rotary drive mechanism drives the pressing head to rotate with the rotating shaft as the center, and moves synchronously with the mask strip. When the pressing head rotates and approaches the ultrasonic welding head, the pressing head drives the ear wire to move downward and gradually contacts the mask strip. The pressing head and the ultrasonic welding head cooperate with each other to weld the ear wire and the mask together.

[0037] (5) The first rotary drive mechanism continues to drive the pressing head to rotate, and the pressing head pushes the mask with the ear wires welded to move in the conveying direction of the mask. At the same time, when the clamping mechanism of the mask with the ear wires welded reaches a specific position, the clamping mechanism releases the ear wires on the mask;

[0038] (6) Repeat the above steps (1) to (5) to complete the continuous processing of the mask middle ear wire welding.

[0039] The working principle of the ear wire continuous welding equipment for mask production of the present invention is:

[0040] During operation, the mask conveying device moves the mask strip toward the direction of the ear wire welding station, and at the same time, the ear wire conveying mechanism moves the ear wire to the ear wire welding station. The ear wire conveying drive mechanism drives multiple clamping mechanisms to move. When the ear wire conveying mechanism delivers the ear wire to the intersection with the ear wire clamping conveying mechanism, the clamping mechanism located at the intersection among the multiple clamping mechanisms clamps the ear wire in the ear wire conveying mechanism. As the ear wire conveying drive mechanism drives the clamping mechanism to move, the clamping mechanism pulls the ear wire to move toward the direction of the ultrasonic welding head and keeps synchronous movement with the mask strip; in this process, another clamping mechanism moves to the intersection with the ear wire conveying mechanism and clamps the ear wire. In this way, the ear wire located in the first clamping mechanism and the second clamping mechanism will not be offset because they are clamped by the two clamping mechanisms, so the position of the ear wire section in the mask is determined. At the same time, the first rotary drive mechanism drives the rotating shaft and the pressing head on the rotating shaft to rotate, and moves synchronously with the mask strip. During the rotation of the pressing head, the pressing head will drive the ear wire to move downward and gradually contact the mask strip; when the pressing head rotates to a vertically downward state, the pressing head will press the mask strip and the ear wire on the ultrasonic welding head, and the ultrasonic welding head will weld the ear wire and the mask together. Finally, the mask conveying device drives the mask strip that has completed the ear wire welding process to continue to move to the next processing station to complete the next processing process. In the above process, the clamping mechanism in the ear wire clamping conveying mechanism, the conveying speed of the mask strip, and the rotation speed of the pressing head on the rotating shaft are consistent. When the mask strip arrives at the ear wire welding station, the ear wire also arrives at the ear wire welding station synchronously under the drive of the ear wire clamping conveying mechanism, and the pressing head on the rotating shaft also presses the ear wire and the mask strip on the ultrasonic welding head at the same time to complete the ear wire welding process. In this way, the mask strip conveying, ear wire conveying and ear wire welding are carried out simultaneously, so that the mask strip does not need to stay at the ear wire welding station, thereby greatly improving the speed of ear wire welding and further improving the production efficiency of the mask.

[0041] Compared with the prior art, the present invention has the following beneficial effects:

[0042] 1. The wire clamping mechanism in the ear wire clamping and conveying mechanism in the ear wire continuous welding equipment for mask production of the present invention, the conveying speed of the mask strip, and the rotation speed of the pressing head on the rotating shaft are kept consistent. When the mask strip arrives at the ear wire welding station, the ear wire also arrives at the ear wire welding station synchronously under the drive of the ear wire clamping and conveying mechanism, and the pressing head on the rotating shaft also presses the ear wire and the mask strip on the ultrasonic welding head at the same time to complete the welding process of the ear wire. In this way, the conveying of the mask strip, the conveying of the ear wire, and the welding of the ear wire are carried out synchronously, so that the mask strip does not need to stay at the ear wire welding station, thereby greatly improving the speed of the ear wire welding, and then improving the production efficiency of the mask.

[0043] 2. The ear wire continuous welding equipment for mask production of the present invention pulls the ear wire in the ear wire conveying mechanism and passes over the ultrasonic welding head through one of the wire clamping mechanisms in the ear wire clamping and conveying mechanism, and in this process, the next wire clamping mechanism clamps the other end of the ear wire and pulls it forward, so that the ear wire located in the first wire clamping mechanism and the second wire clamping mechanism is clamped by the two wire clamping mechanisms; therefore, it will not be offset, so that the position of the ear wire section in the mask is determined, thereby ensuring the accuracy of the ear wire welding, and then improving the production quality of the mask. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 This is a schematic structural diagram of a first embodiment of the continuous ear wire welding equipment for mask production of the present invention, wherein: Figure 1 is a schematic diagram of the three-dimensional structure. Figure 2 is a top view, Figure 3 It is the left view.

[0045] Figure 4 It is a schematic diagram of the internal structure (full section), where: Figure 4 The black line in the figure is the wrap-around method of the ear wire.

[0046] Figure 5 and Figure 6 Schematic diagrams of the three-dimensional structure from two different perspectives after removing the welding device.

[0047] Figure 7 This is a schematic diagram of the three-dimensional structure of the ear wire clamping and conveying mechanism.

[0048] Figure 8 It is a schematic diagram of the structure of the cutting module and the welding module.

[0049] Fig. 9 It is a schematic diagram of the three-dimensional structure of the wire clamping mechanism.

[0050] Fig.10 This is a schematic diagram of the structure of the wire clamping mechanism.

[0051] Figure 11-13 Schematic diagrams of the three-dimensional structure from three different viewing angles of the fourth embodiment of the continuous ear wire welding equipment for producing masks of the present invention.

[0052] Fig.14 for Fig.13 A partial enlarged view of point A in the middle.

[0053] Fig.15 This is a schematic diagram of the internal structure. DETAILED DESCRIPTION

[0054] The present invention is further described in detail below in conjunction with embodiments and drawings, but the embodiments of the present invention are not limited thereto.

[0055] Example 1

[0056] See also Figure 1-Figure 10 The ear wire continuous welding equipment for mask production of the present invention comprises a frame 4, a mask conveying device arranged on the frame 4, an ear wire conveying device, and a welding device 3 for cutting and sealing the mask strips conveyed by the mask conveying device and welding the ear wires conveyed by the ear wire conveying device to the mask, wherein:

[0057] The welding device 3 includes a rotating shaft 3-2 arranged on a frame 4, a cutting module, a welding module and a first rotating drive mechanism for driving the rotating shaft 3-2 to rotate, wherein the cutting module includes a cutting blade 3-4 arranged on the rotating shaft 3-2; the welding module includes an ultrasonic welding head 3-1 arranged on the frame 4 and a pressing head 3-3 arranged on the rotating shaft 3-2 and located above the ultrasonic welding head 3-1, wherein the pressing head 3-3 is arranged on both sides of the cutting blade 3-4; the pressing head 3-3 and the cutting blade 3-4 extend along the axial direction of the rotating shaft 3-2;

[0058] The ear wire conveying device includes an ear wire conveying mechanism 1 and an ear wire clamping and conveying mechanism 2 for clamping the ear wire conveyed by the ear wire conveying mechanism 1 and conveying it synchronously with the mask strip to the ultrasonic welding head 3-1, wherein the ear wire clamping and conveying mechanism 2 is divided into two groups, which are respectively located on both sides of the welding device 3, and each group of ear wire clamping and conveying mechanism 2 includes a conveyor belt 2-1, a plurality of clamping mechanisms 5 for clamping the ear wires arranged on the conveyor belt 2-1, and an ear wire conveying driving mechanism for driving the conveyor belt 2-1 to circulate so as to cause the ear wires to move synchronously with the mask strips; the plurality of clamping mechanisms 5 are arranged at equal distances along the winding direction of the conveyor belt 2-1; wherein, in the present embodiment, the clamping mechanisms are divided into four groups, which are respectively arranged in sequence along the winding direction of the conveyor belt 2-1;

[0059] The mask strip passes between the pressing head 3-3 and the cutting blade 3-4 and the ultrasonic welding head 3-1, and the ear wire clamped by the wire clamping mechanism 5 is located on the upper side of the mask strip; the first rotating drive mechanism drives the pressing head 3-3 and the cutting blade 3-4 on the rotating shaft 3-2 to move synchronously with the mask strip, and the ear wire conveying drive mechanism drives the wire clamping mechanism 5 on the conveyor belt 2-1 to clamp the ear wire and move synchronously with the mask strip; when the pressing head 3-3 and the cutting blade 3-4 reach the ultrasonic welding head 3-1, the pressing head 3-3 welds the end of the mask and the ear wire, and the cutting blade 3-4 cuts off the mask strip and the ear wire.

[0060] See also Figure 1-Figure 10The working principle of the ear wire continuous welding equipment for mask production of the present invention is:

[0061] When working, the mask conveying device moves the mask strips that have completed the mask compounding process (i.e. compounding multiple non-woven fabrics together) and the nose bridge wire installation process (i.e. installing the nose clip) toward the direction of the ear wire welding station, and at the same time, the ear wire conveying mechanism 1 moves the ear wire to the ear wire welding station. The ear wire conveying drive mechanism drives the conveyor belt 2-1 and the multiple clamping mechanisms 5 arranged on the conveyor belt 2-1 to move. When the ear wire conveying mechanism 1 delivers the ear wire to the intersection with the ear wire clamping conveying mechanism 2, the clamping part of the clamping mechanism 5 located at the intersection in the conveyor belt 2-1 opens and clamps the ear wire in the ear wire conveying mechanism 1. As the ear wire conveying drive mechanism drives the conveyor belt 2-1 to circulate, the wire clamping mechanism 5 pulls the ear wire toward the direction of the ultrasonic welding head 3-1 and keeps synchronous movement with the mask strip; in this process, another wire clamping mechanism 5 on the conveyor belt 2-1 moves to the intersection position with the ear wire conveying mechanism 1, and the clamping part in the wire clamping mechanism 5 opens, thereby clamping the ear wire on its clamping part. In this way, the ear wire located in the first wire clamping mechanism 5 and the second wire clamping mechanism 5 is clamped by the two wire clamping mechanisms 5; therefore, no deviation will occur, so that the position of this section of the ear wire in the mask is determined. At the same time, the first rotary drive mechanism drives the pressing head 3-3 and the cutting blade 3-4 to rotate and move synchronously with the mask strip. During the rotation, the pressing head 3-3 will drive the ear wire to move downward and gradually contact the mask strip; when the cutting blade 3-4 is in a vertically downward state, the cutting blade 3-4 cuts off the mask strip and the ear wire. At the same time, the pressing heads 3-3 located on the left and right sides of the cutting blade 3-4 will press the mask strip and the two sides of the ear wire at the cut-off point onto the ultrasonic welding head 3-1, and the ultrasonic welding head 3-1 will weld the ear wire and the mask together. In this way, not only the welding and edge sealing of the ear wire at the end of the previous mask are realized, but also the welding and edge sealing of the ear wire at the head end of the next mask are realized. At the same time, as the rotating shaft 3-2 and the pressing head 3-3 and the cutting blade 3-4 arranged on the rotating shaft 3-2 continue to rotate, the pressing head 3-3 has a forward traction force on the manufactured mask (i.e., the ear wire welding and edge sealing on both sides of the mask are completed), the mask strip and the ear wires, so that the manufactured mask can move forward. At the same time, when the wire clamping mechanism 5 that clamps the ear wires of the manufactured mask reaches a specific position, the wire clamping mechanism 5 releases the ear wires on the mask, so that the mask can fall into the collection mechanism; finally, the above process is repeated, so as to achieve the simultaneous cutting, edge sealing and ear wire welding of the mask, thereby improving the production efficiency of the mask.

[0062] In addition, the clamping mechanism 5 on the conveyor belt of the ear wire clamping and conveying mechanism 2 in the ear wire continuous welding equipment for mask production of the present invention, the conveying speed of the mask strip, and the rotation speed of the pressing head 3-3 on the rotating shaft 3-2 are consistent. When the mask strip arrives at the ear wire welding station, the ear wire also arrives at the ear wire welding station synchronously under the drive of the ear wire clamping and conveying mechanism 2, and the pressing head 3-3 on the rotating shaft 3-2 also simultaneously presses the ear wire and the mask strip on the ultrasonic welding head 3-1 to complete the welding process of the ear wire. In this way, the conveying of the mask strip, the conveying of the ear wire, and the welding of the ear wire are carried out synchronously, so that the mask strip does not need to stay at the ear wire welding station, thereby greatly improving the speed of the ear wire welding, and then improving the production efficiency of the mask.

[0063] In addition to the above-mentioned embodiments, the cutting and edge sealing of the mask strips and the welding of the ear wires can be processed by different devices or processes, that is, the mask strips can be first welded with the ear wires, and then the mask strips can be cut and edge sealed; or the mask strips can be first cut and edge sealed, and then the ear wires can be welded.

[0064] See also Figure 1-Figure 10 , the rotating shaft 3-2 is provided with a mounting groove at a position corresponding to the pressing head 3-3 and the cutting blade 3-4, and the mounting groove extends along the axial direction of the rotating shaft 3-2; the pressing head 3-3 and the cutting blade 3-4 are installed in the mounting groove, wherein the cutting blade 3-4 and the pressing head 3-3 are an integrated structure, and the width is greater than or equal to the width or length of the mask; the pressing head 3-3 is provided with a pressing portion arranged in a matrix (not drawn in the drawings of the specification), and the ultrasonic welding head 3-1 is provided with an avoidance hole that cooperates with the pressing portion at a position corresponding to the pressing portion. The pressing portion on the pressing head 3-3 cooperates with the avoidance hole in the ultrasonic welding head 3-1, so as to realize the welding of the ear wire to the mask, and at the same time realize the edge sealing of the mask. Among them, the pressing head 3-3 and the cutting blade 3-4 are two groups, and are arranged at 180 degrees. That is, the circumference of the pressing head 3-3 and the cutting blade 3-4 rotating half a circle is the width or length of the mask. When an ear-loop mask is to be processed, it is the width of the mask, and when a head-mounted mask is to be processed, it is the length of the mask.

[0065] See also Figure 1-Figure 10The first rotary drive mechanism includes a first rotary drive motor and a synchronous transmission mechanism, wherein the first rotary drive motor is mounted on the frame 4; the synchronous transmission mechanism includes a driving pulley arranged on the main shaft of the first rotary drive motor, a driven pulley arranged on the rotating shaft 3-2, and a transmission belt wrapped around the driving pulley and the driven pulley. The first rotary drive motor drives the synchronous transmission mechanism to move, thereby driving the rotating shaft 3-2 and the pressing head 3-3 and the cutting blade 3-4 arranged on the rotating shaft 3-2 to rotate, thereby realizing the cutting, edge sealing and ear wire welding of the mask.

[0066] See also Figure 1-Figure 10 , the ear wire conveying mechanism 1 includes a first conveying roller 1-1, a second conveying roller 1-2 and a second rotating drive mechanism for driving the first conveying roller 1-1 or the second conveying roller 1-2 to rotate, which are arranged on the frame 4, wherein the first conveying roller 1-1 and the second conveying roller 1-2 are meshed with each other, and the ear wire passes between the first conveying roller 1-1 and the second conveying roller 1-2. The first conveying roller 1-1 or the second conveying roller 1-2 is driven to rotate by the second rotating drive mechanism, thereby conveying the ear wire. Among them, the second rotating drive mechanism can be a combination of a motor and a synchronous belt transmission mechanism, or directly driven by a motor. In addition, it can also share a power source with other conveying mechanisms (such as a mask conveying device or a first rotating drive mechanism), thereby saving cost.

[0067] See also Figure 1-Figure 10 , a positioning rod 6 is arranged on the frame 4 above the first conveying roller 1-1 and the second conveying roller 1-2, and the positioning rod 6 is parallel to the axial direction of the first conveying roller 1-1 and the second conveying roller 1-2. The positioning rod 6 is provided with positioning holes 6-1 at the corresponding positions of the two ear wire clamping and conveying mechanisms 2, and the ear wire passes through the positioning holes 6-1 and enters between the first conveying roller 1-1 and the second conveying roller 1-2. In this way, during the process of the first conveying roller 1-1 or the second conveying roller 1-2 rotating and conveying the ear wire, since the front end of the ear wire is clamped by the clamping mechanism 5 on the conveying belt 2-1 of the corresponding ear wire clamping and conveying mechanism 2, and the other end is restricted by the positioning hole 6-1 on the positioning rod 6, the ear wire will not be deviated during the conveying process, so that the ear wire conveying mechanism 1 can convey the ear wire to the corresponding handover position and achieve smooth handover with the ear wire clamping and conveying mechanism 2.

[0068] See also Figure 1-Figure 10, a guide wheel group 7 for guiding the ear wire is arranged below the first conveying roller 1-1 and the second conveying roller 1-2, wherein the guide wheel group 7 includes a guide rod 7-1 and a guide wheel 7-2 arranged on the guide rod 7-1, wherein the guide rod 7-1 is rotatably connected to the frame 4; the guide wheels 7-2 are divided into two groups, and each group of guide wheels 7-2 corresponds to the positioning holes 6-1 on the positioning rod 6 one by one; each guide wheel 7-2 is provided with a guide groove 7-3 cooperating with the ear wire, and the guide groove 7-3 extends along the circumferential direction of the guide wheel 7-2; the clamping part in the clamping mechanism 5, the guide groove 7-3 on the corresponding guide wheel 7-2 and the corresponding positioning hole 6-1 in the positioning rod 6 are in the same vertical plane; the ear wire passes around the guide groove 7-3 on the corresponding guide wheel 7-2 after coming out of the first conveying roller 1-1 and the second conveying roller 1-2. By arranging corresponding guide wheel groups 7 under the first conveying roller 1-1 and the second conveying roller 1-2, the ear wire can be guided and limited, thereby further preventing the ear wire from deviating during the conveying process, thereby ensuring that the ear wire conveying mechanism 1 and the ear wire clamping and conveying mechanism 2 can smoothly achieve the handover of the ear wire.

[0069] See also Figure 1-Figure 10The ear wire clamping and conveying mechanism also includes a clamping drive mechanism for driving the clamping drive mechanism to clamp or loosen the ear wire, wherein the clamping mechanism 5 includes a sleeve 5-1 and a connecting rod 5-2 arranged in the sleeve 5-1, wherein the sleeve 5-1 is installed on the conveyor belt 2-1, and the axial direction of the sleeve 5-1 is parallel to the width direction of the conveyor belt 2-1; the connecting rod 5-2 is coaxially arranged with the sleeve 5-1, and guide holes matching the connecting rod 5-2 are arranged on both sides of the sleeve 5-1, and a cavity is arranged inside the sleeve 5-1, and the diameter of the cavity is larger than the diameter of the guide hole; the end of the connecting rod 5-2 close to the ultrasonic welding head 3-1 passes through the sleeve 5-1 and is connected to the clamping block 5-3, And the diameter of the clamping block 5-3 is larger than the diameter of the connecting rod 5-2; the clamping block 5-3 and the corresponding end face in the sleeve 5-1 constitute the clamping part of the wire clamping mechanism 5; the wire clamping mechanism 5 also includes an elastic component for causing the clamping block 5-3 on the connecting rod 5-2 to fit with the corresponding end face in the sleeve 5-1, and the elastic component includes a first spring 5-6 and a clamping block 5-5 arranged in the cavity of the sleeve 5-1, wherein the clamping block 5-5 is installed on the connecting rod 5-2 and is located in the cavity; the first spring 5-6 is sleeved on the connecting rod 5-2, and one end acts on the clamping block 5-5, and the other end acts on the inner wall of the sleeve 5-1 close to the ultrasonic welding head 3-1. Through the above structure, when the ear wire conveying drive mechanism drives the conveyor belt 2-1 and the clamping mechanism 5 arranged on the conveyor belt 2-1 to perform a circular motion, the clamping portion in the clamping mechanism 5 is in a closed state, that is, the first spring 5-6 arranged in the sleeve 5-1 is used to urge the clamping block 5-5 arranged on the connecting rod 5-2 to move away from the inner wall of the sleeve 5-1 close to the ultrasonic welding head 3-1, so that the clamping block 5-3 on the connecting rod 5-2 and the sleeve 5-1 move toward each other, thereby realizing the clamping action. When the clamping mechanism 5 moves to the intersection position or the ear wire needs to be loosened, the connecting rod 5-2 is driven by the clamping drive mechanism to move toward the direction of the ultrasonic welding head 3-1, so that the clamping block 5-5 in the connecting rod 5-2 compresses the first spring 5-6 and moves toward the inner wall of the sleeve 5-1 close to the ultrasonic welding head 3-1, so that the clamping block 5-3 will be away from the end face of the sleeve 5-1, thereby realizing the loosening action. When the wire clamping mechanism 5 leaves the clamping drive mechanism, the clamping block 5-3 moves toward the end surface of the sleeve 5-1 again under the action of the first spring 5-6 to achieve resetting or clamping the ear wire.

[0070] See also Figure 1-Figure 10The clamping drive mechanism includes a guide block arranged on the frame 4 and a roller 5-4 arranged on the connecting rod 5-2, wherein the guide blocks are two, wherein the guide block arranged at the corresponding position of the guide wheel group 7 is the ear wire clamping guide block 4-2, and the guide block arranged at the position beyond the ultrasonic welding head 3-1 is the ear wire loosening guide block 4-3; wherein the guide surface of the ear wire clamping guide block 4-2 is inclined upward; the inclination direction of the guide surface of the ear wire loosening guide block 4-3 is opposite to the conveying direction of the mask; the roller 5-4 is rotatably connected to the end of the connecting rod 5-2 away from the ultrasonic welding head 3-1, and the axial direction of the roller 5-4 is perpendicular to the axial direction of the connecting rod 5-2. In the process of the ear wire clamping and conveying mechanism 2 driving the clamping mechanism 5 to move, when the roller 5-4 in the clamping mechanism 5 contacts the guide surface of the guide block, the guide block will generate a thrust on the roller 5-4 and the connecting rod 5-2, so that the clamping block 5-5 in the connecting rod 5-2 compresses the first spring 5-6, thereby separating the clamping block 5-3 from the end surface of the sleeve 5-1, and then gradually opening the clamping part. When the clamping mechanism 5 passes over the guide block, the elastic force of the first spring 5-6 causes the clamping block 5-3 to close with the end surface of the sleeve 5-1, thereby achieving clamping. In addition to the above method, the clamping drive mechanism can also be set in the clamping mechanism 5, and each clamping mechanism 5 can be driven to act separately by a corresponding power mechanism (such as an electromagnet), so as to achieve the clamping and loosening of the ear wire.

[0071] In addition, a groove for guiding the roller 5-4 in the wire clamping mechanism 5 can be provided on the frame 1, and the roller 5-4 extends into the groove. In this way, the conveyor belt 2-1 is not prone to shaking during movement due to the limitation of the groove, thereby improving the accuracy of ear wire clamping and transportation.

[0072] See also Figure 1-Figure 10 The ear wire conveying drive mechanism includes an active synchronous wheel 2-2, a driven synchronous wheel 2-4 and a synchronous drive mechanism for driving the active synchronous wheel 2-2 to rotate, which are arranged on a frame 4, wherein the active synchronous wheel 2-2 and the driven synchronous wheel 2-4 are respectively located on both sides of the ultrasonic welding head 3-1, and the conveyor belt 2-1 vertically surrounds the active synchronous wheel 2-2 and the driven synchronous wheel 2-4.

[0073] See also Figure 1-Figure 10The ear wire conveying drive mechanism in the ear wire clamping and conveying mechanism 2 on both sides of the welding device 3 shares a group of synchronous drive mechanisms, the synchronous drive mechanism includes a first rotating shaft 2-3, a second rotating shaft 2-5 and a synchronous drive motor (not shown in the drawings of the specification) for driving the first rotating shaft 2-3 or the second rotating shaft 2-5 to rotate, wherein the first rotating shaft 2-3 and the second rotating shaft 2-5 are rotatably connected to the frame 4, the active synchronous wheel 2-2 in the ear wire conveying drive mechanism on both sides of the welding device 3 is installed on the first rotating shaft 2-3; the driven synchronous wheel 2-4 in the ear wire conveying drive mechanism on both sides of the welding device 3 is installed on the second rotating shaft 2-5; the synchronous drive motor is installed on the frame 4 and connected to the first rotating shaft 2-3 and the second rotating shaft 2-5 through a synchronous belt transmission mechanism. Through the above structure, the conveyor belt 2-1 in the ear wire clamping and conveying mechanism 2 on both sides of the welding device 3 can be driven to move synchronously, thereby improving the accuracy of ear wire welding. In addition to the above method, the synchronous drive motor can also be a power mechanism in the mask conveying device or the first rotation drive mechanism or the second rotation drive mechanism. The mask conveying device, the first rotation drive mechanism, the second rotation drive mechanism and the synchronous drive mechanism can share a power source only through a synchronous belt transmission mechanism, thereby saving costs.

[0074] See also Figure 1-Figure 10 The frame 4 is provided with an adjustment slot 4-1 at a position corresponding to the first rotating shaft 2-3, and the adjustment slot 4-3 extends along the conveying direction of the mask. By providing the adjustment slot 4-1, the tightness of the conveyor belt 2-1 can be adjusted.

[0075] The mask conveying device in this embodiment can be implemented with reference to existing mask conveying equipment or mechanisms.

[0076] See also Figure 1-Figure 10 The mask welding method of the present invention comprises the following steps:

[0077] (1) The mask conveying device moves the mask strip toward the ear wire welding station, and at the same time, the ear wire conveying mechanism 1 moves the ear wire toward the ear wire welding station;

[0078] (2) The ear wire conveying driving mechanism drives the conveyor belt 2-1 and a plurality of wire clamping mechanisms 5 arranged on the conveyor belt 2-1 to move. When the ear wire conveying mechanism 1 conveys the ear wire to the intersection position with the ear wire clamping conveying mechanism 2, the wire clamping mechanism 5 located at the intersection position in the conveyor belt 2-1 clamps the ear wire in the ear wire conveying mechanism 1;

[0079] (3) The ear wire conveying drive mechanism drives the conveyor belt 2-1 to circulate, so that the clamping mechanism 5 pulls the ear wire to move toward the direction of the ultrasonic welding head 3-1 and keeps synchronous movement with the mask strip; in this process, another clamping mechanism 5 on the conveyor belt 2-1 moves to the intersection position with the ear wire conveying mechanism 1, and the clamping mechanism 5 clamps the ear wire on its clamping part;

[0080] (4) The first rotary drive mechanism drives the pressing head 3-3 on the rotating shaft 3-2 to rotate and move synchronously with the mask strip. During the rotation of the pressing head 3-3, the pressing head 3-3 drives the ear wire to move downward and gradually contacts the mask strip. When the pressing head 3-3 moves to a vertically downward state, the pressing head 3-3 presses the mask strip and the ear wire onto the ultrasonic welding head 3-1, and the ultrasonic welding head 3-1 welds the ear wire and the mask together.

[0081] (5) The first rotary drive mechanism continues to drive the rotating shaft 3-2 to rotate, and the pressing head 3-3 pushes the manufactured mask, mask strip and ear wire to move in the conveying direction of the mask. At the same time, when the clamping mechanism 5 clamping the ear wire of the manufactured mask reaches a specific position, the clamping mechanism 5 loosens the ear wire on the mask, so that the mask can fall off;

[0082] (6) Repeat the above steps (1) to (5) to complete the continuous processing of the mask.

[0083] Example 2

[0084] The mask production line of the present invention includes the ear wire continuous welding equipment for mask production in Example 1. In addition, other structures of the mask production line are implemented with reference to existing mask production equipment.

[0085] Example 3

[0086] The difference between this embodiment and Embodiment 2 is that, in this embodiment, a separate mask strip cutting station is provided at a subsequent station of the ear wire welding station, for cutting off the mask strips with the ear wires welded thereto.

[0087] Example 4

[0088] See also Figure 11-Figure 15 ,in, Fig.15 The number 12 is the ear wire, and the number 13 is the mask strip;

[0089] The difference between this embodiment and embodiment 1 is that:

[0090] See also Figure 11-Figure 15The ear wire conveying drive mechanism includes a rotating wheel 8 arranged on the rotating shaft 3-2, and the multiple clamping mechanisms 5 are installed on the rotating wheel 8; the rotating wheel 8 is provided with a groove 8-1 that cooperates with the ear wire, and the groove 8-1 extends along the circumferential direction of the rotating wheel 8; the pressing head 3-3 is installed on the outer circumferential surface of the rotating wheel 8, and is located behind the clamping mechanism 5 along the rotation direction of the rotating wheel 8, so that the groove 8-1 has a fault at the position of the pressing head 3-3; after coming out of the first conveying roller 1-1 and the second conveying roller 1-2, the ear wire surrounds the guide groove 7-3 of the corresponding guide wheel 7-1 in the guide wheel group 7.

[0091] The wire clamping mechanism 5 and the pressing head 3 - 3 in this embodiment are both in two groups, and are alternately arranged on the rotating wheel 8 along the rotation direction of the rotating wheel 8 .

[0092] See also Figure 11-Figure 15 The working principle of the ear wire continuous welding equipment for mask production in this embodiment is:

[0093] When working, the mask conveying device moves the mask strips toward the ear wire welding station, and at the same time, the ear wire conveying mechanism 1 moves the ear wires toward the ear wire welding station. The first rotary drive mechanism drives the rotating wheel 8 and a plurality of clamping mechanisms 5 disposed on the rotating wheel 8 to move, and when the ear wire conveying mechanism 1 delivers the ear wires to the intersection with the ear wire clamping conveying mechanism 2, the clamping mechanism 5 located at the intersection in the rotating wheel 8 opens and clamps the ear wires in the ear wire conveying mechanism 1. As the ear wire conveying drive mechanism drives the rotating wheel 8 to move, the wire clamping mechanism 5 pulls the ear wire to make a circular motion along the rotating wheel 8, and moves toward the direction of the ultrasonic welding head 3-1, and keeps synchronous movement with the mask strip; in this process, the ear wire will gradually embed into the groove 8-1 of the rotating wheel 8, and through the limiting of the groove 8-1 on the rotating wheel 8 and the positioning hole 6-1 of the guide wheel group 7 and the positioning rod 6, the ear wire pulled by the rotating wheel 8 can always be embedded in the groove 8-1 of the rotating wheel 8 during the rotation; when the other wire clamping mechanism 5 moves to the intersection position with the ear wire conveying mechanism 1, the wire clamping mechanism 5 opens and smoothly clamps the ear wire, so that the ear wire located between the first wire clamping mechanism 5 and the second wire clamping mechanism 5 is clamped by the two wire clamping mechanisms 5; therefore, no deviation will occur, so that this section of the ear wire can smoothly reach the position to be welded in the mask. In this process, since the pressing head 3-3 is arranged on the outer circumference of the rotating wheel 8 and is located behind the clamping mechanism 5, that is, the clamping mechanism 5 first passes over the ultrasonic welding head 3-1, and the pressing head 3-3 then passes over the ultrasonic welding head 3-1; and since the groove 8-1 on the rotating wheel 8 has a fault at the pressing head 3-3; therefore, the ear wire located at the pressing head 3-3 will be tangent to the pressing part of the pressing head 3-3, and when the pressing head 3-3 rotates to contact the ultrasonic welding head 3-1, the pressing head 3-3 will press the mask strip and the ear wire on the ultrasonic welding head 3-1, and the ultrasonic welding head 3-1 will weld the ear wire and the mask together. Finally, the mask conveying device drives the mask strip that has completed the ear wire welding process to continue to move to the next processing station to complete the next processing process.

[0094] See also Figure 11-Figure 15The wire clamping mechanism 5 includes a clamping rod 11 embedded in the side of the rotating wheel 8 away from the ultrasonic welding head 3-1, and the rotating wheel 8 is provided with an avoidance groove at a position corresponding to the clamping rod 11, and the avoidance groove is connected with the groove 8-1, and the clamping rod 11 is rotatably connected in the avoidance groove and extends into the groove 8-1 along the radial direction of the rotating wheel 8; the clamping rod 11 and the side wall of the groove 8-1 constitute the clamping part of the wire clamping mechanism 5; an elastic member 12 is provided between the clamping rod 11 and the rotating wheel 8, and the elastic force of the elastic member 12 causes the clamping rod 11 to fit with the side wall of the groove 8-1, wherein the elastic member 12 is a torsion spring. Through the above structure, the clamping rod 11 is fitted with the side wall of the groove 8-1 under the action of the torsion spring. When the clamping portion of the wire clamping mechanism 5 needs to be opened, only a force needs to be provided to drive the end of the clamping rod 11 away from the groove 8-1 to move toward the direction of the rotating wheel 8, so that the side wall of the clamping rod 11 close to the groove 8-1 overcomes the elastic force of the torsion spring and moves in the opposite direction to the groove 8-1, thereby opening the clamping portion of the wire clamping mechanism 5. When the wire clamping mechanism 5 needs to be closed, only the force needs to be removed, and the clamping rod 11 will fit with the side wall of the groove 8-1 under the action of the torsion spring, thereby achieving clamping. The force can be provided by other power mechanisms, such as a cylinder or a motor, or by other non-power mechanisms, such as the following example:

[0095] See also Figure 11-Figure 15 The ear wire clamping and conveying mechanism 2 also includes a clamping drive mechanism for driving the clamping mechanism 5 to clamp and open, wherein the clamping drive mechanism includes a push block 9 arranged on the frame 4, and the push blocks 9 are two groups, one of which is arranged at the intersection of the ear wire conveying mechanism 1 and the ear wire clamping and conveying mechanism 2, and its purpose is to prompt the clamping mechanism 5 to loosen so as to clamp the ear wire; the other group is arranged at a position beyond the ultrasonic welding head 3-1, and its purpose is to prompt the clamping mechanism 5 to loosen so as to release the clamped ear wire; wherein the push block 9 extends horizontally, and an arc-shaped guide surface is provided at a position corresponding to the clamping rod 11, and when the clamping rod 11 rotates to the end of the clamping rod 11 away from the groove 8-1 and contacts the guide surface on the push block 9; the clamping rod 11 overcomes the elastic force of the elastic member 12 and separates from the side wall of the groove 8-1.

[0096] Through the above structure, when the rotating wheel 8 rotates to the point where the end of the clamping rod 11 away from the groove 8-1 contacts the arc-shaped guide surface on the push block 9, the arc-shaped guide surface will generate a force on the end of the clamping rod 11 away from the groove 8-1, prompting the end of the clamping rod 11 away from the groove 8-1 to move toward the rotating wheel 8, so that the end of the clamping rod 11 close to the groove 8-1 overcomes the elastic force of the torsion spring and moves in the direction away from the rotating wheel 8, thereby separating from the side wall of the groove 8-1; thus, the clamping portion of the clamping mechanism 5 is released. When the rotating wheel 8 moves to the point where the clamping rod 11 of the clamping mechanism 5 on the rotating wheel 8 separates from the push block 9, the clamping rod 11 fits against the side wall of the groove 8-1 under the force of the torsion spring, thereby achieving clamping.

[0097] In addition to the above structure, a roller can be provided at the end of the push block 9, the roller is rotatably connected to the push block 9, and the axis of the roller is vertically arranged, which can also generate a thrust on the clamping rod 11 to prompt the wire clamping mechanism 5 to open.

[0098] See also Figure 11-Figure 15 A sliding mechanism 10 is arranged between the two ends of the rotating shaft 3-2 and the frame 4, and the sliding mechanism 10 includes a slider 10-1 arranged on the rotating shaft 3-2 and a slide groove 10-2 arranged on the frame 4, wherein the two ends of the rotating shaft 3-2 are rotatably connected to the slider 10-1, and the slider 10-1 is installed on the slide groove 10-2, and a second spring 10-3 is arranged between the lower end of the slider 10-1 and the bottom of the slide groove 10-2, and one end of the second spring 10-3 acts on the bottom of the slider 10-1, and the other end acts on the bottom of the slide groove 10-2. By setting the above structure, the pressing head 3-3 on the rotating wheel 8 can elastically press the ear wire and the mask strip onto the ultrasonic welding head 3-1; when the pressing head 3-3 is rotated to a vertically downward state, if the distance between the upper surface of the ultrasonic welding head 3-1 and the pressing part of the pressing head 3-3 is too small to pass the ear wire and the mask strip, if there is no sliding mechanism 10 in this embodiment, the rotating wheel 8 will get stuck and cannot continue to work. By setting the sliding mechanism 10 in this embodiment, when the pressing head 3-3 drives the ear wire to contact the mask strip, due to the small distance, the pressing head 3-3 will be subjected to the upward force of the mask strip, and the force is transmitted to the rotating shaft 3-2, so that the rotating shaft 3-2 overcomes the elastic force of the second spring 10-3 and drives the slider 10-1 to move upward, thereby increasing the distance between the pressing head 3-3 and the ultrasonic welding head 3-1, and then elastically pressing the ear wire onto the mask strip, and at the same time allowing the pressing head 3-3 to pass over the ultrasonic welding head 3-1 without being stuck, thereby ensuring the continuous progress of the welding work.

[0099] In addition to this embodiment, this structure can also be adopted in embodiment 1 to achieve the same effect.

[0100] In addition, the guide wheel set 7 in this embodiment is arranged above the first conveying roller 1-1 and the second conveying roller 1-2, and the positioning rod 6 is arranged in the middle position between the first conveying roller 1-1 and the second conveying roller 1-2, which is also different from Example 1. The ear wire conveying mechanism 1, the guide wheel set 7, the positioning rod 6 and the synchronous driving mechanism in this embodiment can all be implemented with reference to Example 1.

[0101] The above is a preferred embodiment of the present invention, but the embodiment of the present invention is not limited to the above content. Any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principles of the present invention should be equivalent replacement methods and are included in the protection scope of the present invention.

Claims

1. A continuous welding device for ear wires in mask production, characterized in that: The invention comprises a frame, a mask conveying device arranged on the frame, an ear wire conveying device, and a welding device for welding the ear wire conveyed by the ear wire conveying device to the mask, wherein: The welding device comprises a rotating shaft, a welding module and a first rotating driving mechanism for driving the rotating shaft to rotate, wherein the welding module comprises an ultrasonic welding head arranged on a frame and a pressing head arranged on the rotating shaft, wherein the ultrasonic welding head is located below the rotating shaft; the ear wire conveying device comprises an ear wire conveying mechanism and an ear wire clamping and conveying mechanism for clamping the ear wire conveyed by the ear wire conveying mechanism and conveying it to the ultrasonic welding head synchronously with the mask strip, wherein the ear wire clamping and conveying mechanism comprises two groups, which are respectively located on both sides of the welding device, and each group of ear wire clamping and conveying mechanism comprises a plurality of clamping mechanisms for clamping the ear wires and an ear wire conveying driving mechanism for driving the clamping mechanism to cyclically move so as to cause the ear wires to move synchronously with the mask strip; The mask strip passes between the rotating shaft and the ultrasonic welding head, and the ear wire clamped by the wire clamping mechanism is located on the upper side of the mask strip; the ear wire conveying drive mechanism drives multiple wire clamping mechanisms to clamp the ear wires and the mask strip to move synchronously, and when the pressing head rotates with the rotating shaft to a position corresponding to the ultrasonic welding head, they cooperate with each other to weld the mask strip and the ear wires together; The ear wire clamping and conveying mechanism also includes a clamping driving mechanism for driving the clamping mechanism to clamp or loosen the ear wire, wherein the clamping mechanism includes a sleeve and a connecting rod arranged in the sleeve, wherein the sleeve is installed on the conveyor belt, and the axial direction of the sleeve is parallel to the width direction of the conveyor belt; the connecting rod is coaxially arranged with the sleeve, and guide holes matching the connecting rod are arranged on both sides of the sleeve, and a cavity is arranged inside the sleeve, and the diameter of the cavity is larger than the diameter of the guide hole; the end of the connecting rod close to the ultrasonic welding head passes through the sleeve and is connected to the clamping block, And the diameter of the clamping block is larger than the diameter of the connecting rod; the clamping block and the corresponding end face in the sleeve constitute the clamping part of the wire clamping mechanism; the wire clamping mechanism also includes an elastic component for causing the clamping block on the connecting rod to fit with the corresponding end face in the sleeve, and the elastic component includes a first spring and a clamping block arranged in the cavity of the sleeve, wherein the clamping block is installed on the connecting rod and is located in the cavity; the first spring is sleeved on the connecting rod, and one end acts on the clamping block, and the other end acts on the inner wall of the sleeve close to the ultrasonic welding head.

2. The ear wire continuous welding equipment for mask production according to claim 1 is characterized in that: The welding device further comprises a cutting module for cutting the mask strips, wherein the cutting module comprises a cutting blade arranged on a rotating shaft; the cutting blade extends along the axial direction of the rotating shaft.

3. The ear wire continuous welding equipment for mask production according to claim 2 is characterized in that: The pressing heads are in two groups and are respectively located on both sides of the cutting blade and extend along the axial direction of the rotating shaft.

4. The ear wire continuous welding equipment for mask production according to claim 3 is characterized in that: The pressing head and the cutting blade are an integrated structure; the first rotary drive mechanism drives the pressing head and the cutting blade on the rotating shaft to move synchronously with the mask strip. When the pressing head and the cutting blade reach the ultrasonic welding head, the pressing head welds the end of the mask and the ear wire, and the cutting blade cuts off the mask strip and the ear wire.

5. The ear wire continuous welding equipment for mask production according to claim 4, characterized in that: A mounting groove is provided on the rotating shaft at a position corresponding to the pressing head and the cutting blade, and the mounting groove extends along the axial direction of the rotating shaft; the pressing head and the cutting blade are installed in the mounting groove, and the pressing head and the cutting blade are two groups, and are arranged at 180 degrees; wherein the widths of the cutting blade and the pressing head are both greater than or equal to the width or length of the mask; the pressing head is provided with a pressing part arranged in a matrix, and the ultrasonic welding head is provided with an avoidance hole cooperating with the pressing part at a position corresponding to the pressing part.

6. The ear wire continuous welding equipment for mask production according to claim 5, characterized in that: The first rotary drive mechanism includes a first rotary drive motor and a synchronous transmission mechanism, wherein the first rotary drive motor is mounted on a frame; the synchronous transmission mechanism includes a driving pulley arranged on a main shaft of the first rotary drive motor, a driven pulley arranged on a rotating shaft, and a transmission belt wrapped around the driving pulley and the driven pulley.

7. The ear wire continuous welding equipment for mask production according to claim 1, characterized in that: The ear wire conveying mechanism includes a first conveying roller, a second conveying roller and a second rotating driving mechanism for driving the first conveying roller or the second conveying roller to rotate, wherein the first conveying roller and the second conveying roller are meshed with each other, and the ear wire passes between the first conveying roller and the second conveying roller.

8. The ear wire continuous welding equipment for mask production according to claim 7, characterized in that: A positioning rod is arranged on the frame above the first conveying roller and the second conveying roller. The positioning rod is parallel to the axial direction of the first conveying roller and the second conveying roller. Positioning holes are arranged on the positioning rod at positions corresponding to the two ear wire clamping and conveying mechanisms. The ear wire passes through the positioning hole and enters between the first conveying roller and the second conveying roller.

9. A mask production line, characterized in that: The invention relates to a continuous ear wire welding device for producing a mask comprising the device described in any one of claims 1 to 8.

10. A welding method for the ear wire continuous welding equipment used in the mask production according to claim 1, characterized in that: The following steps are involved: (1) The mask conveying device moves the mask strips that have completed the compounding process and the nose bridge wire assembly process toward the ear wire welding station. At the same time, the ear wire conveying mechanism drives the ear wire to move toward the ear wire welding station; (2) The ear wire conveying driving mechanism drives the multiple wire clamping mechanisms to move, and when the ear wire conveying mechanism conveys the ear wire to the intersection with the ear wire clamping conveying mechanism, the wire clamping mechanism located at the intersection clamps the ear wire in the ear wire conveying mechanism; (3) The ear wire conveying drive mechanism drives the wire clamping mechanism to circulate, pulls the ear wire toward the direction of the ultrasonic welding head, and keeps synchronous movement with the mask strip; during this process, another wire clamping mechanism moves to the intersection position with the ear wire conveying mechanism and clamps the ear wire; (4) The first rotary drive mechanism drives the pressing head to rotate with the rotating shaft as the center, and moves synchronously with the mask strip. When the pressing head rotates and approaches the ultrasonic welding head, the pressing head drives the ear wire to move downward and gradually contacts the mask strip. The pressing head and the ultrasonic welding head cooperate with each other to weld the ear wire and the mask together. (5) The first rotary drive mechanism continues to drive the pressing head to rotate, and the pressing head pushes the mask with the ear wires welded to move in the conveying direction of the mask. At the same time, when the clamping mechanism of the mask with the ear wires welded reaches a specific position, the clamping mechanism releases the ear wires on the mask; (6) Repeat the above steps (1) to (5) to complete the continuous processing of the mask middle ear wire welding.

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