CN111152465A

CN111152465A - Ear line continuous welding equipment and method for mask production and mask production line

Info

Publication number: CN111152465A
Application number: CN202010105565.1A
Authority: CN
Inventors: 王开来; 胡军连; 赖汉进
Original assignee: Guangzhou Mingsen Hexing Tech Co ltd
Current assignee: Guangzhou Mingsen Hexing Tech Co ltd
Priority date: 2020-02-20
Filing date: 2020-02-20
Publication date: 2020-05-15
Also published as: CN111674050A

Abstract

The invention discloses ear line continuous welding equipment, a welding method and a mask production line for mask production; the ear line continuous welding equipment for mask production comprises a rack, a mask conveying device, an ear line conveying device and a welding device; the welding device comprises a rotating shaft, a welding module and a first rotary driving mechanism; the welding module comprises an ultrasonic welding head and a pressing head; the ear wire conveying device comprises two groups of ear wire clamping and conveying mechanisms which are respectively positioned at two sides of the welding device, and each group of ear wire clamping and conveying mechanisms comprises a plurality of wire clamping mechanisms and ear wire conveying driving mechanisms; the wire clamping mechanism clamps the ear wire and the mask strip to move synchronously. The ear line continuous welding equipment for mask production can realize synchronous conveying of masks and ear lines, so that the masks do not need to stay at ear line welding stations, and the production efficiency of the masks is greatly improved.

Description

Ear line continuous welding equipment and method for mask production and mask production line

Technical Field

The invention relates to mask production equipment, in particular to ear line continuous welding equipment, a welding method and a mask production line for mask production.

Background

The mask is a sanitary article, is generally worn at the mouth and nose part for filtering air entering the mouth and nose so as to achieve the purpose of preventing harmful gas, smell and spray from entering and exiting the mouth and nose of a wearer, is made of gauze or paper and the like, has a certain filtering effect on air entering the lung, and has a very good effect when the mask is worn in operation in an environment polluted by dust and the like when respiratory infectious diseases are prevalent.

The existing mask production adopts an automatic production process, so that the production speed of the mask can be improved. For example, the utility model patent with the publication number of CN209121339U discloses a "mask production line", the mask production line 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 turnover device, a limiting device and an ear band welding device which are installed on the workbench and are sequentially arranged along the moving direction of a face material strip. Through above-mentioned gauze mask production line to realize the automated production of gauze mask. In addition, the invention patent application with application publication number CN108433215A discloses a full-automatic mask production line, which comprises a frame, a mask cloth edge sealing device, a mask face folding device, a mask transverse sealing and cutting device and an ear band welding device, wherein the mask cloth edge sealing device, the mask face folding device, the mask transverse sealing and cutting device and the ear band welding device are sequentially installed on the frame from front to back, and automatic production of masks can be realized through the full-automatic mask production line.

However, the above-mentioned fully automatic mask production line and mask production line have the following disadvantages:

foretell full-automatic gauze mask production line and gauze mask production line are carrying out ear line welded in-process, and when the gauze mask passed through gauze mask conveying mechanism and moved ear line welding station, gauze mask conveying mechanism stopped driving for the gauze mask stops an end time in ear line welding station department, and in this section of time, ear line conveying mechanism presss from both sides the ear line and gets and send the corresponding position department of gauze mask, then, ear line welding module work, with the ear line welding to the gauze mask on, accomplish ear line welding process. In the process, the mask needs to stay for a period of time after reaching the ear wire welding station, the ear wire conveying mechanism is waited to clamp the ear wire and convey the ear wire to the corresponding position in the mask, the ear wire welding mechanism can work, the ear wire welding speed can be reduced, and therefore the production efficiency of the mask is reduced.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide the ear line continuous welding equipment for mask production, which can realize synchronous conveying of masks and ear lines and realize welding in the conveying process, so that the masks do not need to stay at an ear line welding station, and the production efficiency of the masks is greatly improved.

The second purpose of the invention is to provide a welding method of the ear wire continuous welding equipment applied to mask production, and the welding method can realize welding of the mask and the ear wire in the conveying process, thereby greatly improving the production efficiency of the mask.

A third object of the present invention is to provide a mask production line.

The technical scheme for solving the technical problems is as follows:

an ear wire continuous welding device for mask production, which comprises a frame, a mask conveying device arranged on the frame, an ear wire conveying device and a welding device for welding an ear wire conveyed by the ear wire conveying device on a mask, wherein,

the welding device comprises a rotating shaft, a welding module and a first rotary driving mechanism for driving the rotating shaft to rotate, wherein the welding module comprises an ultrasonic welding head arranged on the rack and a pressing head arranged on the rotating shaft, and the ultrasonic welding head is positioned below the rotating shaft;

the ear wire conveying device comprises ear wire conveying mechanisms and ear wire clamping and conveying mechanisms, wherein the ear wire clamping and conveying mechanisms are used for clamping ear wires conveyed by the ear wire conveying mechanisms and conveying the ear wires to the ultrasonic welding joint synchronously with the mask strips;

the mask strip penetrates through the space between the rotating shaft and the ultrasonic welding head, and the ear line clamped by the line clamping mechanism is positioned on the upper side of the mask strip; ear wire conveying and driving mechanism drives a plurality of clamping mechanism clamping ear wires and mask strips to move synchronously, and when the pressing head rotates along with the rotating shaft to correspond to the ultrasonic welding head, the pressing head is matched with the ultrasonic welding head to weld the mask strips and the ear wires together.

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

Preferably, the two groups of pressing heads are respectively located at two sides of the cutting edge and extend along the axial direction of the rotating shaft.

Preferably, the pressing head and the cutting edge are of an integral structure; first rotary driving mechanism drive epaxial press head and cutting edge and gauze mask strip simultaneous movement, when press head and cutting edge reachd ultrasonic bonding head, the press head welds gauze mask tip and ear line, the cutting edge cuts off gauze mask strip and ear line.

Preferably, the rotating shaft is provided with an installation groove at a position corresponding to the pressing head and the cutting edge, and the installation groove extends along the axial direction of the rotating shaft; the pressing head and the cutting edge are arranged in the mounting groove, and the pressing head and the cutting edge are arranged in two groups and are arranged at 180 degrees; wherein, the width of the cutting edge and the pressing head is more than or equal to the width or the length of the mask; the ultrasonic welding head is provided with a pressing part which is arranged in a matrix mode, and the ultrasonic welding head is provided with an avoiding hole matched with the pressing part at the position corresponding to the pressing part.

Preferably, the first rotary driving mechanism comprises a first rotary driving motor and a synchronous transmission mechanism, wherein the first rotary driving motor is mounted on the frame; the synchronous transmission mechanism comprises a driving belt wheel arranged on a main shaft of the first rotary driving motor, a driven belt wheel arranged on a rotating shaft and a transmission belt wound on the driving belt wheel and the driven belt wheel.

Preferably, the ear wire conveying mechanism comprises a first conveying roller, a second conveying roller and a second rotary driving mechanism, wherein the first conveying roller and the second conveying roller are arranged on the rack, the second rotary driving mechanism is used for driving the first conveying roller or the second conveying roller to rotate, the first conveying roller and the second conveying roller are meshed with each other, and the ear wire penetrates through the space between the first conveying roller and the second conveying roller.

Preferably, a positioning rod is arranged above the first conveying roller and the second conveying roller on the rack, the positioning rod is parallel to the axial direction of the first conveying roller and the second conveying roller, positioning holes are arranged at positions corresponding to the two lug wire clamping and conveying mechanisms on the positioning rod, and the lug wires enter between the first conveying roller and the second conveying roller after passing through the positioning holes.

Preferably, a guide wheel set for guiding the ear line is arranged below the first conveying roller and the second conveying roller, wherein the guide wheel set comprises a guide rod and a guide wheel arranged on the guide rod, and the guide rod is rotatably connected to the frame; the guide wheels are divided into two groups, and each group of guide wheels corresponds to the positioning holes in the positioning rod one by one; each guide wheel is provided with a guide groove matched 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 positioned on the same vertical plane; and the ear wires bypass the guide grooves on the corresponding guide wheels after coming out of the first conveying roller and the second conveying roller.

Preferably, the ear line conveying driving mechanism comprises a conveying belt and a synchronous driving mechanism for driving the conveying belt to circularly run, wherein the plurality of line clamping mechanisms are arranged at equal intervals along the surrounding direction of the conveying belt.

Preferably, the ear wire clamping and conveying mechanism further comprises a clamping driving mechanism for driving the wire clamping mechanism to clamp or loosen the ear wire, wherein the wire clamping mechanism comprises a sleeve and a connecting rod arranged in the sleeve, the sleeve is mounted on the conveying belt, and the axial direction of the sleeve is parallel to the width direction of the conveying belt; the connecting rod and the sleeve are coaxially arranged, guide holes matched with the connecting rod are formed in two sides of the sleeve, a cavity is formed in the sleeve, and the diameter of the cavity is larger than that of the guide holes; one end of the connecting rod, which is close to the ultrasonic welding head, penetrates through the sleeve and then is connected with the clamping block, and the diameter of the clamping block is larger than that of the connecting rod; the clamping block and the corresponding end surface in the sleeve form a clamping part of the wire clamping mechanism; the wire clamping mechanism further comprises an elastic assembly used for enabling the clamping block on the connecting rod to be attached to the corresponding end face in the sleeve, the elastic assembly comprises a first spring and a clamping block arranged in a cavity of the sleeve, and the clamping block is mounted on the connecting rod and located in the cavity; the first spring is sleeved on the connecting rod, one end of the first spring acts on the clamping block, and the other end of the first spring acts on the inner wall, close to the ultrasonic welding head, of the sleeve.

Preferably, the clamping driving mechanism comprises two guide blocks arranged on the rack and rollers arranged on the connecting rod, wherein the guide block arranged at the position corresponding to the guide wheel set is an ear wire clamping guide block, and the guide block arranged at the position crossing the ultrasonic welding head is an ear wire loosening guide block; wherein, the guide surface of the ear wire clamping guide block is inclined upwards; the inclination direction of the guide surface of the ear wire loosening guide block is opposite to the conveying direction of the mask; the roller is rotatably connected to one end, far away from the ultrasonic welding head, of the connecting rod, and the axis direction of the roller is perpendicular to the axis direction of the connecting rod.

A second preferred version of the ear wire feed drive mechanism, wherein,

preferably, the ear line conveying driving mechanism comprises a rotating wheel arranged on the rotating shaft, and the plurality of line clamping mechanisms are arranged on the rotating wheel; the rotating wheel is provided with a groove matched with the ear line, 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 rotating direction of the rotating wheel.

Preferably, the wire clamping mechanism comprises a clamping rod embedded in the side face, far away from the ultrasonic welding head, of the rotating wheel, an avoiding groove is formed in the position, corresponding to the clamping rod, of the rotating wheel, the avoiding groove is communicated with the groove, the clamping rod is rotatably connected in the avoiding groove and extends into the groove along the radial direction of the rotating wheel; the clamping rod and the side wall of the groove form a clamping part of the wire clamping mechanism; an elastic piece is arranged between the clamping rod and the rotating wheel, and the elastic force of the elastic piece enables the clamping rod to be attached to the side wall of the groove.

Preferably, the lug wire clamping and conveying mechanism further comprises a clamping driving mechanism for driving the wire clamping mechanism to clamp and open, wherein the clamping driving mechanism comprises two groups of push blocks arranged on the rack, one group of the push blocks is arranged at the joint position of the lug wire conveying mechanism and the lug wire clamping and conveying mechanism, and the other group of the push blocks is arranged at a position crossing the ultrasonic welding head; the push block extends horizontally, a circular arc-shaped guide surface is arranged at a position corresponding to the clamping rod, and when the clamping rod rotates to the state that the end part of the clamping rod, far away from the groove, is in contact with the guide surface on the push block; the clamping rod is separated from the side wall of the groove by overcoming the elasticity of the elastic piece.

Preferably, sliding mechanisms are arranged between the two ends of the rotating shaft and the rack, each sliding mechanism comprises a sliding block arranged on the rotating shaft and a sliding groove arranged on the rack, the two ends of the rotating shaft are rotatably connected to the sliding blocks, the sliding blocks are arranged on the sliding grooves, second springs are arranged at the lower ends of the sliding blocks and the bottoms of the sliding grooves, one ends of the second springs act on the bottoms of the sliding blocks, and the other ends of the second springs act on the bottoms of the sliding grooves.

Preferably, the two groups of wire clamping mechanisms and the two groups of pressing heads are respectively and alternately arranged on the rotating wheel along the rotating direction of the rotating wheel.

A mask production line comprises ear line continuous welding equipment for mask production.

A welding method of an ear line continuous welding device for mask production comprises the following steps:

(1) the mask strip which completes the compounding process and the nose bridge line assembling process moves towards the ear line welding station by the mask conveying device, and meanwhile, the ear line conveying mechanism drives the ear line to move towards the ear line welding station;

(2) the ear wire conveying driving mechanism drives the plurality of wire clamping mechanisms to move, and when the ear wire conveying mechanism conveys the ear wire to a joint position of the ear wire clamping and conveying mechanism, the wire clamping mechanism at the joint position clamps the ear wire in the ear wire conveying mechanism;

(3) the ear wire conveying and driving mechanism drives the wire clamping mechanism to circularly move, pulls the ear wire to move towards the ultrasonic welding head and keeps synchronous movement with the mask strip; in the process, the other wire clamping mechanism moves to a joint position where the other wire clamping mechanism is jointed with the ear wire conveying mechanism and clamps the ear wire;

(4) the first rotary driving mechanism drives the pressing head to rotate by taking the rotating shaft as a circle center and synchronously move with the mask strip, and in the process that the pressing head rotates and approaches the ultrasonic welding head, the pressing head drives the ear line to move downwards and gradually contact with the mask strip, and the pressing head and the ultrasonic welding head are mutually matched to weld the ear line and the mask together;

(5) the first rotary driving mechanism continues to drive the pressing head to rotate, the pressing head pushes the mask welded with the ear wires to move towards the conveying direction of the mask, and meanwhile, when the wire clamping mechanism clamping the mask welded with the ear wires reaches a specific position, the wire clamping mechanism loosens the ear wires on the mask;

(6) and (5) repeating the steps (1) to (5) to finish the continuous processing of welding the middle ear line of the mask.

The ear line continuous welding equipment for mask production disclosed by the invention has the working principle that:

during operation, gauze mask conveyor moves the gauze mask strip towards the direction of ear wire welding station, and simultaneously, ear wire conveying mechanism moves the ear wire towards ear wire welding station department. The ear wire conveying driving mechanism drives the plurality of wire clamping mechanisms to move, and when the ear wire conveying mechanism conveys the ear wire to the connection position of the ear wire clamping conveying mechanism, the wire clamping mechanism positioned at the connection position among the plurality of wire clamping mechanisms clamps the ear wire in the ear wire conveying mechanism. The ear wire conveying driving mechanism drives the wire clamping mechanism to move, so that the wire clamping mechanism pulls the ear wire to move towards the ultrasonic welding head and keeps synchronous movement with the mask strip; in the process, the other thread clamping mechanism moves to a joint position where the other thread clamping mechanism is jointed with the ear thread conveying mechanism and clamps the ear thread, so that the ear thread in the first thread clamping mechanism and the second thread clamping mechanism is clamped by the two thread clamping mechanisms; therefore, the displacement does not occur, so that the position of the section of ear line in the mask is determined. Meanwhile, the first rotary driving mechanism drives the rotating shaft and the pressing head on the rotating shaft to rotate and move synchronously with the mask strip, and in the rotating process of the pressing head, the pressing head drives the ear line to move downwards and gradually contact with the mask strip; when the pressing head rotates to be in a vertical downward state, the pressing head can press the mask strip and the ear line on the ultrasonic welding head, and the ear line and the mask are welded together through the ultrasonic welding head. And finally, the mask conveying device drives the mask strips which have finished the ear line welding process to continue to move to the next processing station so as to finish the next processing process. In the process, the wire clamping mechanism in the ear wire clamping and conveying mechanism, the conveying speed of the mask strip and the rotating speed of the pressing head in the rotating shaft are kept consistent, when the mask strip reaches the ear wire welding station, the ear wire synchronously reaches the ear wire welding station under the driving of the ear wire clamping and conveying mechanism, and the pressing head in the rotating shaft simultaneously compresses the ear wire and the mask strip on the ultrasonic welding head to complete the welding process of the ear wire. The conveying, the ear line conveying and the ear line welding of the mask strip are synchronously carried out, so that the mask strip does not need to stay at an ear line welding station, the ear line welding speed is greatly increased, and the production efficiency of the mask is improved.

Compared with the prior art, the invention has the following beneficial effects:

1. the line clamping mechanism in the ear line clamping and conveying mechanism, the conveying speed of the mask strip and the rotating speed of the pressing head on the rotating shaft in the ear line continuous welding equipment for mask production are kept consistent, when the mask strip reaches the ear line welding station, the ear line synchronously reaches the ear line welding station under the driving of the ear line clamping and conveying mechanism, and the pressing head on the rotating shaft simultaneously presses the ear line and the mask strip on the ultrasonic welding head to complete the ear line welding process. The conveying, the ear line conveying and the ear line welding of the mask strip are synchronously carried out, so that the mask strip does not need to stay at an ear line welding station, the ear line welding speed is greatly increased, and the production efficiency of the mask is improved.

2. According to the ear wire continuous welding equipment for mask production, the ear wire in the ear wire conveying mechanism is pulled to pass over the ultrasonic welding head through one of the wire clamping mechanisms in the ear wire clamping and conveying mechanism, and in the process, the other end of the ear wire is clamped and pulled forwards by the next wire clamping mechanism, so that the ear wires in the first wire clamping mechanism and the second wire clamping mechanism are clamped by the two wire clamping mechanisms; therefore, the position of the section of ear wire in the mask can not be determined, the welding precision of the ear wire is ensured, and the production quality of the mask is improved.

Drawings

Fig. 1 is a schematic structural view of a first embodiment of an ear line continuous welding apparatus for mask production according to the present invention, in which fig. 1 is a schematic perspective view, fig. 2 is a top view, and fig. 3 is a left side view.

Fig. 4 is a schematic diagram (full section) of the internal structure, wherein the black line in fig. 4 is a surrounding manner of the ear line.

Fig. 5 and 6 are schematic perspective views of two different viewing angles after the welding device is removed.

Fig. 7 is a schematic perspective view of the ear wire clamping and conveying mechanism.

FIG. 8 is a schematic diagram of a cutting module and a welding module.

Fig. 9 is a schematic perspective view of the wire clamping mechanism.

Fig. 10 is a schematic view of the wire clamping mechanism.

Fig. 11 to 13 are schematic perspective views of three different viewing angles of a fourth embodiment of an ear line continuous welding apparatus for mask production according to the present invention.

Fig. 14 is a partial enlarged view of a portion a in fig. 13.

Fig. 15 is a schematic view of the internal structure.

Detailed Description

The present invention will be described in further detail with reference to examples and drawings, but the present invention is not limited thereto.

Example 1

Referring to fig. 1 to 10, the ear line continuous welding equipment for mask production according to the present invention comprises a frame 4, a mask conveying device provided on the frame 4, an ear line conveying device, and a welding device 3 for cutting and sealing the mask strip conveyed from the mask conveying device and simultaneously welding the ear line conveyed from the ear line conveying device to the mask, wherein,

the welding device 3 comprises a rotating shaft 3-2 arranged on a frame 4, a cutting module, a welding module and a first rotary driving mechanism for driving the rotating shaft 3-2 to rotate, wherein the cutting module comprises a cutting edge 3-4 arranged on the rotating shaft 3-2; the welding module comprises 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 positioned above the ultrasonic welding head 3-1, wherein the pressing head 3-3 is arranged on two sides of the cutting edge 3-4; the pressing head 3-3 and the cutting edge 3-4 extend along the axial direction of the rotating shaft 3-2;

the ear wire conveying device comprises ear wire conveying mechanisms 1 and ear wire clamping and conveying mechanisms 2 which are used for clamping ear wires conveyed by the ear wire conveying mechanisms 1 and conveying the ear wires to an ultrasonic welding head 3-1 synchronously with the mask strips, wherein the ear wire clamping and conveying mechanisms 2 are divided into two groups and are respectively positioned at two sides of the welding device 3, and each group of ear wire clamping and conveying mechanisms 2 comprises a conveying belt 2-1, a plurality of wire clamping mechanisms 5 which are arranged on the conveying belt 2-1 and used for clamping the ear wires and an ear wire conveying driving mechanism which is used for driving the conveying belt 2-1 to circularly move so as to promote the ear wires and the mask strips to synchronously move; the plurality of wire clamping mechanisms 5 are arranged at equal intervals along the surrounding direction of the conveying belt 2-1; in the embodiment, the wire clamping mechanisms are four groups and are sequentially arranged along the surrounding direction of the conveying belt 2-1;

the mask strip penetrates through the space between the pressing head 3-3 and the cutting edge 3-4 and the ultrasonic welding head 3-1, and the ear line clamped by the line clamping mechanism 5 is positioned on the upper side of the mask strip; the first rotary driving mechanism drives the pressing head 3-3 and the cutting edge 3-4 on the rotating shaft 3-2 to synchronously move with the mask strip, and the ear wire conveying driving mechanism drives the wire clamping mechanism 5 on the conveying belt 2-1 to clamp the ear wire and synchronously move with the mask strip; when the pressing head 3-3 and the cutting edge 3-4 reach the ultrasonic welding head 3-1, the end part of the mask and the ear line are welded by the pressing head 3-3, and the mask strip and the ear line are cut by the cutting edge 3-4.

Referring to fig. 1 to 10, the ear line continuous welding apparatus for mask production according to the present invention is based on the following working principle:

during operation, gauze mask conveyor will have accomplished gauze mask complex process (being about to the multiple non-woven fabrics complex be in the same place) and the gauze mask strip of bridge of the nose line installation process (installing the nose promptly) and move towards ear line welding station's direction, and simultaneously, ear line conveying mechanism 1 moves the ear line towards ear line welding station department. The ear wire conveying driving mechanism drives the conveying belt 2-1 and the plurality of wire clamping mechanisms 5 arranged on the conveying belt 2-1 to move, when the ear wire conveying mechanism 1 conveys the ear wire to a connection position of the ear wire clamping conveying mechanism 2, a clamping part of the wire clamping mechanism 5 positioned at the connection position in the conveying belt 2-1 is opened, and the ear wire in the ear wire conveying mechanism 1 is clamped. The ear wire conveying driving mechanism drives the conveying belt 2-1 to circularly move, so that the wire clamping mechanism 5 pulls the ear wire to move towards the ultrasonic welding head 3-1 and keeps synchronous movement with the mask strip; in the process, the other thread clamping mechanism 5 on the conveying belt 2-1 moves to the joint position of the ear thread conveying mechanism 1, the clamping part in the thread clamping mechanism 5 is opened, so that the ear thread is clamped on the clamping part, and thus, the ear thread in the first thread clamping mechanism 5 and the second thread clamping mechanism 5 is clamped by the two thread clamping mechanisms 5; therefore, the displacement does not occur, so that the position of the section of ear line in the mask is determined. Meanwhile, the first rotary driving mechanism drives the pressing head 3-3 and the cutting edge 3-4 to rotate and move synchronously with the mask strip, and in the rotating process, the pressing head 3-3 drives the ear line to move downwards and gradually contact with the mask strip; when the cutting edge 3-4 is in a vertically downward state, the cutting edge 3-4 cuts off the mask strip and the ear line, meanwhile, the pressing heads 3-3 positioned at the left side and the right side of the cutting edge 3-4 can press two sides of the cut part in the mask strip and the ear line onto the ultrasonic welding joint 3-1, and the ultrasonic welding joint 3-1 is used for welding the ear line and the mask together, so that the welding and the edge sealing of the ear line at the tail end of the previous mask are realized, and the welding and the edge sealing of the ear line at the head end of the next mask are also realized. Meanwhile, with the continuous rotation of the rotating shaft 3-2 and the pressing head 3-3 and the cutting edge 3-4 arranged on the rotating shaft 3-2, the pressing head 3-3 has a forward traction force on the manufactured mask (namely, the welding and edge sealing of the ear lines at the two sides of the mask are finished), the mask strips and the ear lines, so that the manufactured mask can move forward, and meanwhile, when the wire clamping mechanism 5 for clamping the ear lines of the manufactured mask reaches a specific position, the wire clamping mechanism 5 loosens the ear lines on the mask, so that the mask can fall into the collecting mechanism; finally, the processes are repeated, so that the cutting, the edge sealing and the welding of the ear line of the mask are synchronously performed, and the production efficiency of the mask is improved.

In addition, the wire clamping mechanism 5 on the conveying belt of the ear wire clamping and conveying mechanism 2, the conveying speed of the mask strip and the rotating speed of the pressing head 3-3 on the rotating shaft 3-2 in the ear wire continuous welding equipment for mask production are kept consistent, when the mask strip reaches the ear wire welding station, the ear wire synchronously reaches the ear wire welding station under the driving of the ear wire clamping and conveying mechanism 2, and the pressing head 3-3 on the rotating shaft 3-2 simultaneously presses the ear wire and the mask strip on the ultrasonic welding head 3-1, so that the ear wire welding process is completed. The conveying, the ear line conveying and the ear line welding of the mask strip are synchronously carried out, so that the mask strip does not need to stay at an ear line welding station, the ear line welding speed is greatly increased, and the production efficiency of the mask is improved.

In addition to the above embodiments, the cutting and sealing of the mask strip and the welding of the ear line may be performed by different devices or processes, that is, the mask strip may be welded with the ear line first and then cut and sealed; or firstly cutting and sealing the mask strip and then welding the ear line.

Referring to fig. 1 to 10, the rotating shaft 3-2 is provided with mounting grooves at positions corresponding to the pressing head 3-3 and the cutting edge 3-4, and the mounting grooves extend along the axial direction of the rotating shaft 3-2; the pressing head 3-3 and the cutting edge 3-4 are arranged in the mounting groove, wherein the cutting edge 3-4 and the pressing head 3-3 are of an integral structure, and the width of the cutting edge and the pressing head is larger than or equal to the width or the length of the mask; the pressing head 3-3 is provided with pressing parts (not shown in the attached drawings of the specification) which are arranged in a matrix manner, and the ultrasonic welding head 3-1 is provided with avoidance holes matched with the pressing parts at the positions corresponding to the pressing parts. The pressing part on the pressing head 3-3 is matched with the avoiding hole in the ultrasonic welding head 3-1, so that ear lines are welded on the mask, and the edge sealing of the mask is realized at the same time. Wherein, the pressing head 3-3 and the cutting edge 3-4 are arranged in two groups at 180 degrees. Namely, the circumference of the half-turn of the pressing head 3-3 and the cutting edge 3-4 is the width or length of the mask, and is the width of the mask when the ear-band type mask is to be processed, and is the length of the mask when the head-wearing type mask is to be processed.

Referring to fig. 1-10, 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 the frame 4; the synchronous transmission mechanism comprises a driving belt wheel arranged on a main shaft of the first rotary driving motor, a driven belt wheel arranged on a rotating shaft 3-2 and a transmission belt wound on the driving belt wheel and the driven belt wheel. The first rotary driving motor drives the synchronous transmission mechanism to move, so that the rotating shaft 3-2, the pressing head 3-3 and the cutting edge 3-4 arranged on the rotating shaft 3-2 are driven to rotate, and the mask is cut off, the edge sealed and the ear line are welded.

Referring to fig. 1 to 10, the ear line conveying mechanism 1 includes a first conveying roller 1-1, a second conveying roller 1-2, and a second rotary driving mechanism for driving the first conveying roller 1-1 or the second conveying roller 1-2 to rotate, which are disposed on the frame 4, wherein the first conveying roller 1-1 and the second conveying roller 1-2 are engaged with each other, and the ear line passes through between the first conveying roller 1-1 and the second conveying roller 1-2. The second rotary driving mechanism drives the first conveying roller 1-1 or the second conveying roller 1-2 to rotate, so that the ear wires are conveyed. The second rotary driving mechanism can adopt a mode of combining a motor and a synchronous belt transmission mechanism, or directly adopts a mode of driving the motor, and in addition, the second rotary driving mechanism can also share one power source with other conveying mechanisms (such as a mask conveying device or a first rotary driving mechanism), so that the cost is saved.

Referring to fig. 1 to 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, the positioning rod 6 is parallel to the axial direction of the first conveying roller 1-1 and the second conveying roller 1-2, positioning holes 6-1 are arranged on the positioning rod 6 at positions corresponding to the two ear line clamping and conveying mechanisms 2, and the ear lines enter between the first conveying roller 1-1 and the second conveying roller 1-2 after passing through the positioning holes 6-1. Thus, in the process of rotating and conveying the ear wire by the first conveying roller 1-1 or the second conveying roller 1-2, the front end of the ear wire is clamped by the wire clamping mechanism 5 on the conveying belt 2-1 of the corresponding ear wire clamping and conveying mechanism 2, and the other end of the ear wire is limited by the positioning hole 6-1 on the positioning rod 6, so that the ear wire cannot deviate in the conveying process, the ear wire conveying mechanism 1 can convey the ear wire to the corresponding handover position, and smooth handover of the ear wire clamping and conveying mechanism 2 is realized.

Referring to fig. 1 to 10, a guide wheel set 7 for guiding the ear line is arranged below the first conveying roller 1-1 and the second conveying roller 1-2, wherein the guide wheel set 7 comprises a guide rod 7-1 and a guide wheel 7-2 arranged on the guide rod 7-1, and 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 matched with the ear line, and the guide groove 7-3 extends along the circumferential direction of the guide wheel 7-2; the clamping part in the wire 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 positioned on the same vertical plane; the ear lines go out of the first conveying roller 1-1 and the second conveying roller 1-2 and then bypass the corresponding guide grooves 7-3 on the guide wheels 7-2. The corresponding guide wheel set 7 is arranged below the first conveying roller 1-1 and the second conveying roller 1-2, so that the ear wires can be guided and limited, the ear wires are further prevented from being deviated in the conveying process, and the ear wire conveying mechanism 1 and the ear wire clamping conveying mechanism 2 are further guaranteed to smoothly realize the handing-over of the ear wires.

Referring to fig. 1-10, the ear wire clamping and conveying mechanism further comprises a clamping driving mechanism for driving the clamping driving mechanism to clamp or release the ear wire, wherein the wire clamping mechanism 5 comprises a sleeve 5-1 and a connecting rod 5-2 arranged in the sleeve 5-1, wherein the sleeve 5-1 is mounted on the conveying belt 2-1, and the axial direction of the sleeve 5-1 is parallel to the width direction of the conveying belt 2-1; the connecting rod 5-2 and the sleeve 5-1 are coaxially arranged, guide holes matched with the connecting rod 5-2 are formed in two sides of the sleeve 5-1, a cavity is formed in the sleeve 5-1, and the diameter of the cavity is larger than that of the guide holes; one end of the connecting rod 5-2, which is close to the ultrasonic welding head 3-1, penetrates through the sleeve 5-1 and then is connected with the clamping block 5-3, and the diameter of the clamping block 5-3 is larger than that of the connecting rod 5-2; the clamping block 5-3 and the corresponding end surface of the sleeve 5-1 form a clamping part of the wire clamping mechanism 5; the wire clamping mechanism 5 further comprises an elastic assembly for urging the clamping block 5-3 on the connecting rod 5-2 to be attached to the corresponding end face of the sleeve 5-1, the elastic assembly comprises a first spring 5-6 and a clamping block 5-5 which are arranged in a cavity of the sleeve 5-1, wherein the clamping block 5-5 is mounted 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, one end of the first spring acts on the clamping block 5-5, and the other end of the first spring acts on the inner wall, close to the ultrasonic welding head 3-1, in the sleeve 5-1. Through the structure, when the ear wire conveying driving mechanism drives the conveying belt 2-1 and the wire clamping mechanism 5 arranged on the conveying belt 2-1 to do circulating motion, the clamping part in the wire clamping mechanism 5 is in a closed state, namely the clamping block 5-5 arranged on the connecting rod 5-2 is driven to be far away from the inner wall, close to the ultrasonic welding head 3-1, in the sleeve 5-1 through the first spring 5-6 arranged in the sleeve 5-1, so that the clamping block 5-3 on the connecting rod 5-2 and the sleeve 5-1 do opposite motion, and clamping action is achieved. When the wire clamping mechanism 5 moves to the connection position or the ear wire needs to be loosened, the connecting rod 5-2 is driven to move towards the ultrasonic welding head 3-1 through the clamping driving mechanism, so that the clamping block 5-5 in the connecting rod 5-2 compresses the first spring 5-6 and moves towards the inner wall of the sleeve 5-1 close to the ultrasonic welding head 3-1, and then the clamping block 5-3 is far away from the end face of the sleeve 5-1, so that the loosening action is realized. When the wire clamping mechanism 5 leaves the clamping driving mechanism, the clamping block 5-3 moves towards the end face of the sleeve 5-1 again under the action of the first spring 5-6, so that the ear wire is reset or clamped.

Referring to fig. 1 to 10, the clamping driving mechanism includes two guide blocks disposed on the frame 4 and two rollers 5-4 disposed on the connecting rod 5-2, wherein the guide block disposed at a position corresponding to the guide wheel set 7 is an ear wire clamping guide block 4-2, and the guide block disposed at a position crossing the ultrasonic welding head 3-1 is an ear wire releasing guide block 4-3; wherein, the guide surface of the ear wire clamping guide block 4-2 is inclined upwards; 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 one end of the connecting rod 5-2 far 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 that the ear wire clamping and conveying mechanism 2 drives the wire clamping mechanism 5 to move, when the roller 5-4 in the wire clamping mechanism 5 is in contact with the guide surface of the guide block, the guide block can generate a thrust force 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, the clamping block 5-3 is separated from the end surface of the sleeve 5-1, and the clamping part is gradually opened. When the wire clamping mechanism 5 passes over the guide block, the elastic force of the first spring 5-6 urges the clamping block 5-3 to close with the end face of the sleeve 5-1, so that clamping is realized. Besides the above manner, the clamping driving mechanism may also be disposed in the wire clamping mechanism 5, and each wire clamping mechanism 5 is driven to act independently by a corresponding power mechanism (e.g. an electromagnet), so as to clamp and release the ear wire.

In addition, a groove for guiding the roller 5-4 in the wire clamping mechanism 5 can be further formed in the rack 1, and the roller 5-4 extends into the groove, so that the conveying belt 2-1 is not prone to shaking due to the limit of the groove in the moving process, and the accuracy of ear wire clamping and conveying is improved.

Referring to fig. 1-10, the ear line conveying driving mechanism comprises a driving synchronizing wheel 2-2, a driven synchronizing wheel 2-4 and a synchronous driving mechanism for driving the driving synchronizing wheel 2-2 to rotate, wherein the driving synchronizing wheel 2-2 and the driven synchronizing wheel 2-4 are respectively arranged on two sides of an ultrasonic welding head 3-1, and the conveying belt 2-1 vertically surrounds the driving synchronizing wheel 2-2 and the driven synchronizing wheel 2-4.

Referring to fig. 1 to 10, the ear wire feeding driving mechanisms in the ear wire gripping and feeding mechanisms 2 on both sides of the welding device 3 share a set of synchronous driving mechanisms, which includes a first rotating shaft 2-3, a second rotating shaft 2-5, and a synchronous driving motor (not shown in the drawings) 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, and the driving synchronizing wheels 2-2 in the ear wire feeding driving mechanisms on both sides of the welding device 3 are mounted on the first rotating shaft 2-3; driven synchronous wheels 2-4 in the ear wire conveying driving mechanism positioned at two sides of the welding device 3 are arranged on the second rotating shafts 2-5; the synchronous driving motor is arranged on the frame 4 and is connected with the first rotating shaft 2-3 and the second rotating shaft 2-5 through a synchronous belt transmission mechanism. Through the structure, the ear wire clamping conveying mechanisms 2 on the two sides of the welding device 3 can be driven to synchronously move the conveying belts 2-1 in the conveying mechanism 2, so that the accuracy of ear wire welding is improved. In addition to the above manner, the synchronous driving motor may also be a power mechanism in the mask conveying device or the first rotary driving mechanism or the second rotary driving mechanism, and the mask conveying device, the first rotary driving mechanism, the second rotary driving mechanism and the synchronous driving mechanism can share one power source only by using the synchronous belt transmission mechanism, so that the cost is saved.

Referring to fig. 1 to 10, the frame 4 is provided with an adjustment groove 4-1 at a position corresponding to the first rotation axis 2-3, and the adjustment groove 4-3 extends along a conveying direction of the mask. The tightness of the conveying belt 2-1 can be adjusted by arranging the adjusting groove 4-1.

The mask conveying device in this embodiment may be implemented by referring to an existing mask conveying apparatus or mechanism.

Referring to fig. 1 to 10, the mask welding method of the present invention includes the steps of:

(1) the mask strip is moved towards the ear line welding station by the mask conveying device, and meanwhile, the ear line is moved towards the ear line welding station by the ear line conveying mechanism 1;

(2) when the ear wire conveying mechanism 1 conveys the ear wire to a joint position with the ear wire clamping and conveying mechanism 2, the ear wire clamping mechanism 5 positioned at the joint position in the conveying belt 2-1 clamps the ear wire in the ear wire conveying mechanism 1;

(3) the ear wire conveying driving mechanism drives the conveying belt 2-1 to circularly move, so that the wire clamping mechanism 5 pulls the ear wire to move towards the ultrasonic welding head 3-1 and keeps synchronous movement with the mask strip; in the process, the other thread clamping mechanism 5 on the conveying belt 2-1 moves to a joint position where the other thread clamping mechanism is jointed with the ear thread conveying mechanism 1, and the other thread clamping mechanism 5 clamps the ear thread on the clamping part of the other thread clamping mechanism;

(4) the first rotary driving mechanism drives the pressing head 3-3 on the rotating shaft 3-2 to rotate and move synchronously with the mask strip, and in the process of rotating the pressing head 3-3, the pressing head 3-3 drives the ear line to move downwards and gradually contact with 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 line onto the ultrasonic welding head 3-1, and the ear line and the mask are welded together by the ultrasonic welding head 3-1;

(5) the first rotary driving mechanism continues to drive the rotating shaft 3-2 to rotate, the pressing head 3-3 pushes the manufactured mask, the mask strips and the ear wires to move towards the conveying direction of the mask, and meanwhile, when the wire clamping mechanism 5 for clamping the ear wires of the manufactured mask reaches a specific position, the wire clamping mechanism 5 loosens the ear wires on the mask, so that the mask can fall off;

(6) and (5) repeating the steps (1) to (5) to finish the continuous processing of the mask.

Example 2

The mask production line of the present invention includes the ear line continuous welding apparatus for mask production in example 1, and other structures of the mask production line are implemented with reference to the existing mask production apparatus.

Example 3

The difference between this embodiment and embodiment 2 is that in this embodiment, a separate mask strip cutting station is provided at a station subsequent to the ear line welding station, and is used for cutting off the mask strip on which the ear line is welded.

Example 4

Referring to fig. 11-15, in fig. 15, reference numeral 12 is an ear line and reference numeral 13 is a mask strip;

the present embodiment is different from embodiment 1 in that:

referring to fig. 11-15, the ear wire conveying driving mechanism comprises a rotating wheel 8 arranged on the rotating shaft 3-2, and the plurality of wire clamping mechanisms 5 are mounted on the rotating wheel 8; the rotating wheel 8 is provided with a groove 8-1 matched with the ear line, and the groove 8-1 extends along the circumferential direction of the rotating wheel 8; the pressing head 3-3 is arranged on the outer circumferential surface of the rotating wheel 8 and is positioned behind the thread clamping mechanism 5 along the rotating direction of the rotating wheel 8, so that the groove 8-1 has a fault at the position of the pressing head 3-3; the ear line is wound around the guide groove 7-3 of the corresponding guide wheel 7-1 of the guide wheel group 7 after coming out of the first conveying roller 1-1 and the second conveying roller 1-2.

The thread clamping mechanism 5 and the pressing heads 3-3 in this embodiment are two groups, and are respectively and alternately arranged on the rotating wheel 8 along the rotating direction of the rotating wheel 8.

Referring to fig. 11 to 15, the ear line continuous welding apparatus for mask production according to the present embodiment operates on the following principle:

during operation, gauze mask conveyor moves the gauze mask strip towards the direction of ear wire welding station, and simultaneously, ear wire conveying mechanism 1 moves the ear wire towards ear wire welding station department. The first rotary driving mechanism drives the rotating wheel 8 and the plurality of wire clamping mechanisms 5 arranged on the rotating wheel 8 to move, when the ear wire conveying mechanism 1 conveys the ear wire to a connection position of the ear wire clamping conveying mechanism 2, the wire clamping mechanism 5 positioned at the connection position in the rotating wheel 8 opens and clamps the ear wire in the ear wire conveying mechanism 1. The ear wire conveying driving mechanism drives the rotating wheel 8 to move, so that the wire clamping mechanism 5 pulls the ear wire to do circular motion along the rotating wheel 8 and move towards the ultrasonic welding head 3-1, and the ear wire and the mask strip keep synchronous motion; in the process, the ear line can be gradually embedded into the groove 8-1 of the rotating wheel 8, and the ear line pulled by the rotating wheel 8 can be always embedded into the groove 8-1 of the rotating wheel 8 in the rotating process through the limit of the groove 8-1 on the rotating wheel 8 and the locating holes 6-1 of the guide wheel set 7 and the locating rod 6; when the other thread clamping mechanism 5 moves to the connecting position connected with the ear thread conveying mechanism 1, the thread clamping mechanism 5 is opened and smoothly clamps the ear thread, so that the ear thread between the first thread clamping mechanism 5 and the second thread clamping mechanism 5 is clamped by the two thread clamping mechanisms 5; therefore, the offset does not occur, and the section of ear line can smoothly reach the position to be welded in the mask. In the process, the pressing head 3-3 is arranged on the outer circumferential surface of the rotating wheel 8 and is positioned behind the wire clamping mechanism 5, namely the wire clamping mechanism 5 firstly passes over the ultrasonic welding head 3-1, and the pressing head 3-3 secondly passes over the ultrasonic welding head 3-1; and a fault appears at the pressing head 3-3 due to the groove 8-1 on the rotating wheel 8; therefore, the ear line at the pressing head 3-3 will be tangent to the pressing portion 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 line against the ultrasonic welding head 3-1, and the ear line and the mask are welded together by the ultrasonic welding head 3-1. And finally, the mask conveying device drives the mask strips which have finished the ear line welding process to continue to move to the next processing station so as to finish the next processing process.

Referring to fig. 11-15, the wire clamping mechanism 5 includes a clamping bar 11 embedded in a side surface of the rotating wheel 8 far from the ultrasonic welding head 3-1, the rotating wheel 8 is provided with an avoiding groove at a position corresponding to the clamping bar 11, the avoiding groove is communicated with the groove 8-1, and the clamping bar 11 is rotatably connected in the avoiding groove and extends into the groove 8-1 along a radial direction of the rotating wheel 8; the clamping rod 11 and the side wall of the groove 8-1 form a clamping part of the wire clamping mechanism 5; an elastic part 12 is arranged between the clamping rod 11 and the rotating wheel 8, the elastic force of the elastic part 12 enables the clamping rod 11 to be attached to the side wall of the groove 8-1, and the elastic part 12 is a torsion spring. Through the structure, the clamping rod 11 is attached to the side wall of the groove 8-1 under the action of the torsion spring, when the clamping part of the wire clamping mechanism 5 needs to be opened, only one action force needs to be provided to drive the end part, far away from the groove 8-1, of the clamping rod 11 to move towards the direction of the rotating wheel 8, so that the side wall, close to the groove 8-1, of the clamping rod 11 overcomes the elasticity of the torsion spring and makes reverse movement with the groove 8-1, and the clamping part of the wire clamping mechanism 5 is opened. When the wire clamping mechanism 5 needs to be closed, the clamping rod 11 can be attached to the side wall of the groove 8-1 under the action of the torsion spring only by removing the acting force, so that clamping is realized. The force may be provided by other power mechanisms, such as a cylinder or a motor, or may be provided by other non-power mechanisms, such as the following examples:

referring to fig. 11-15, the ear wire clamping and conveying mechanism 2 further includes a clamping driving mechanism for driving the wire clamping mechanism 5 to clamp and open, wherein the clamping driving mechanism includes two sets of pushing blocks 9 disposed on the frame 4, and one set of the pushing blocks 9 is disposed at a junction position of the ear wire conveying mechanism 1 and the ear wire clamping and conveying mechanism 2, and is used for facilitating the wire clamping mechanism 5 to release so as to clamp the ear wire; the other set is arranged at a position beyond the ultrasonic welding head 3-1, and the purpose of the other set is to promote the loosening of the wire clamping mechanism 5 so as to release the clamped ear wires; the push block 9 extends horizontally, and a circular arc-shaped guide surface is arranged at a position corresponding to the clamping rod 11, when the clamping rod 11 rotates until the end of the clamping rod 11 far away from the groove 8-1 is contacted with the guide surface on the push block 9; the clamping bar 11 is separated from the side wall of the groove 8-1 against the elastic force of the elastic member 12.

With the above structure, when the rotating wheel 8 rotates until the end of the clamping rod 11 far from the concave groove 8-1 contacts with the circular arc guide surface on the pushing block 9, the circular arc guide surface will generate a force on the end of the clamping rod 11 far from the concave groove 8-1, and will force the end of the clamping rod 11 far from the concave groove 8-1 to move towards the rotating wheel 8, so that the end of the clamping rod 11 near the concave groove 8-1 will move towards the direction far from the rotating wheel 8 against the elastic force of the torsion spring, and will be separated from the side wall of the concave groove 8-1; this achieves the release of the clamping portion of the thread clamping mechanism 5. When the rotating wheel 8 moves to the position where the clamping rod 11 of the wire clamping mechanism 5 on the rotating wheel 8 is separated from the push block 9, the clamping rod 11 is attached to the side wall of the groove 8-1 under the action of the torsion spring, so that clamping is realized.

Besides the structure, the tail end of the push block 9 can be provided with a roller, the roller is rotatably connected to the push block 9, and the axis of the roller is vertically arranged, so that the thrust can be generated to the clamping rod 11 to promote the opening of the wire clamping mechanism 5.

Referring to fig. 11-15, a sliding mechanism 10 is disposed between the two ends of the rotating shaft 3-2 and the frame 4, the sliding mechanism 10 includes a sliding block 10-1 disposed on the rotating shaft 3-2 and a sliding slot 10-2 disposed on the frame 4, wherein the two ends of the rotating shaft 3-2 are rotatably connected to the sliding block 10-1, the sliding block 10-1 is mounted on the sliding slot 10-2, a second spring 10-3 is disposed between the lower end of the sliding block 10-1 and the bottom of the sliding slot 10-2, one end of the second spring 10-3 acts on the bottom of the sliding block 10-1, and the other end acts on the bottom of the sliding slot 10-2. By the arrangement of the structure, the pressing head 3-3 on the rotating wheel 8 can elastically press the ear line and the mask strip on 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 portion of the pressing head 3-3 is too small to pass through the ear line and the mask strip, the rotating wheel 8 is locked without the sliding mechanism 10 in this embodiment, and cannot continue to operate. By arranging the sliding mechanism 10 in the embodiment, when the pressing head 3-3 drives the ear line to contact with the mask strip, due to the fact that the distance is too small, the pressing head 3-3 can receive an upward acting force of the mask strip, the acting force is transmitted to the rotating shaft 3-2, the rotating shaft 3-2 overcomes the elastic force of the second spring 10-3 and drives the sliding block 10-1 to move upwards, the distance between the pressing head 3-3 and the ultrasonic welding head 3-1 is increased, the ear line is elastically pressed on the mask strip, and meanwhile the pressing head 3-3 can cross over the ultrasonic welding head 3-1 and cannot be clamped, and therefore continuous welding operation is guaranteed.

In addition to this embodiment, the same effect can be obtained by adopting such a configuration in embodiment 1.

In addition, the guide wheel group 7 in the present embodiment is disposed above the first conveyor roller 1-1 and the second conveyor roller 1-2, and the positioning rod 6 is disposed at an intermediate position between the first conveyor roller 1-1 and the second conveyor roller 1-2, which is also different from embodiment 1. The ear wire feeding mechanism 1, the guide wheel set 7, the positioning rod 6, and the synchronous drive mechanism in the present embodiment can be implemented with reference to embodiment 1.

The present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents and are included in the scope of the present invention.

Claims

1. An ear wire continuous welding device for mask production is characterized by comprising a frame, a mask conveying device arranged on the frame, an ear wire conveying device and a welding device for welding an ear wire conveyed by the ear wire conveying device on a mask, wherein,

2. The ear line continuous welding apparatus for mask production according to claim 1, wherein the welding device further comprises a cutting module for cutting the mask strip, the cutting module comprising a cutting edge provided on a rotating shaft; the cutting edge extends along the axial direction of the rotating shaft.

3. The ear line continuous welding device for mask production according to claim 2, wherein the pressing heads are two groups, are respectively located at two sides of the cutting edge, and extend along the axial direction of the rotating shaft.

4. The ear line continuous welding device for mask production according to claim 3, wherein the pressing head and the cutting edge are of an integral structure; first rotary driving mechanism drive epaxial press head and cutting edge and gauze mask strip simultaneous movement, when press head and cutting edge reachd ultrasonic bonding head, the press head welds gauze mask tip and ear line, the cutting edge cuts off gauze mask strip and ear line.

5. The ear line continuous welding device for mask production according to claim 4, wherein a mounting groove is provided on the rotary shaft at a position corresponding to the pressing head and the cutting edge, the mounting groove extending along the axial direction of the rotary shaft; the pressing head and the cutting edge are arranged in the mounting groove, and the pressing head and the cutting edge are arranged in two groups and are arranged at 180 degrees; wherein, the width of the cutting edge and the pressing head is more than or equal to the width or the length of the mask; the ultrasonic welding head is provided with a pressing part which is arranged in a matrix mode, and the ultrasonic welding head is provided with an avoiding hole matched with the pressing part at the position corresponding to the pressing part.

6. The ear wire continuous welding device for mask production according to claim 5, wherein the first rotary drive mechanism comprises a first rotary drive motor and a synchronous transmission mechanism, wherein the first rotary drive motor is mounted on the frame; the synchronous transmission mechanism comprises a driving belt wheel arranged on a main shaft of the first rotary driving motor, a driven belt wheel arranged on a rotating shaft and a transmission belt wound on the driving belt wheel and the driven belt wheel.

7. The continuous welding device for the ear wire produced by the mask according to claim 1, wherein the ear wire conveying mechanism comprises a first conveying roller, a second conveying roller and a second rotary driving mechanism, the first conveying roller and the second conveying roller are arranged on the frame, the second rotary driving mechanism is used for driving the first conveying roller or the second conveying roller to rotate, the first conveying roller and the second conveying roller are meshed with each other, and the ear wire passes through the space between the first conveying roller and the second conveying roller.

8. The continuous welding equipment for the ear line produced by the mask according to claim 7, wherein a positioning rod is arranged above the first conveying roller and the second conveying roller on the frame, 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 line clamping and conveying mechanisms, and the ear line enters between the first conveying roller and the second conveying roller after passing through the positioning holes.

9. The continuous welding equipment for the ear wire produced by the mask according to claim 8, wherein a guide wheel set for guiding the ear wire is arranged below the first conveying roller and the second conveying roller, wherein the guide wheel set comprises a guide rod and a guide wheel arranged on the guide rod, and the guide rod is rotatably connected to a frame; the guide wheels are divided into two groups, and each group of guide wheels corresponds to the positioning holes in the positioning rod one by one; each guide wheel is provided with a guide groove matched 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 positioned on the same vertical plane; and the ear wires bypass the guide grooves on the corresponding guide wheels after coming out of the first conveying roller and the second conveying roller.

10. The ear wire continuous welding device for mask production according to claim 9, wherein the ear wire feeding driving mechanism comprises a conveyor belt and a synchronous driving mechanism for driving the conveyor belt to circulate, wherein the plurality of wire clamping mechanisms are arranged at equal intervals along a circulating direction of the conveyor belt.

11. The ear wire continuous welding device for mask production according to claim 10, wherein the ear wire clamping and conveying mechanism further comprises a clamping driving mechanism for driving the wire clamping mechanism to clamp or unclamp the ear wire, wherein the wire clamping mechanism comprises a sleeve and a connecting rod arranged in the sleeve, wherein the sleeve is mounted on the conveying belt, and the axial direction of the sleeve is parallel to the width direction of the conveying belt; the connecting rod and the sleeve are coaxially arranged, guide holes matched with the connecting rod are formed in two sides of the sleeve, a cavity is formed in the sleeve, and the diameter of the cavity is larger than that of the guide holes; one end of the connecting rod, which is close to the ultrasonic welding head, penetrates through the sleeve and then is connected with the clamping block, and the diameter of the clamping block is larger than that of the connecting rod; the clamping block and the corresponding end surface in the sleeve form a clamping part of the wire clamping mechanism; the wire clamping mechanism further comprises an elastic assembly used for enabling the clamping block on the connecting rod to be attached to the corresponding end face in the sleeve, the elastic assembly comprises a first spring and a clamping block arranged in a cavity of the sleeve, and the clamping block is mounted on the connecting rod and located in the cavity; the first spring is sleeved on the connecting rod, one end of the first spring acts on the clamping block, and the other end of the first spring acts on the inner wall, close to the ultrasonic welding head, of the sleeve.

12. The continuous welding device for the ear wire produced by the mask according to claim 11, wherein the holding driving mechanism comprises two guide blocks provided on the frame and two rollers provided on the connecting rod, wherein the guide block provided at a position corresponding to the guide wheel group is an ear wire clamping guide block, and the guide block provided at a 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 upwards; the inclination direction of the guide surface of the ear wire loosening guide block is opposite to the conveying direction of the mask; the roller is rotatably connected to one end, far away from the ultrasonic welding head, of the connecting rod, and the axis direction of the roller is perpendicular to the axis direction of the connecting rod.

13. The ear wire continuous welding device for mask production according to claim 1, wherein said ear wire feeding drive mechanism comprises a rotary wheel provided on said rotary shaft, said plurality of wire clamping mechanisms being mounted on said rotary wheel; the rotating wheel is provided with a groove matched with the ear line, 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 rotating direction of the rotating wheel.

14. The ear line continuous welding device for mask production according to claim 13, wherein the line clamping mechanism comprises a clamping bar embedded in a side surface of the rotating wheel away from the ultrasonic welding head, the rotating wheel is provided with an avoidance groove at a position corresponding to the clamping bar, the avoidance groove is communicated with the groove, and the clamping bar is rotatably connected in the avoidance groove and extends into the groove along a radial direction of the rotating wheel; the clamping rod and the side wall of the groove form a clamping part of the wire clamping mechanism; an elastic piece is arranged between the clamping rod and the rotating wheel, and the elastic force of the elastic piece enables the clamping rod to be attached to the side wall of the groove.

15. The continuous welding device for the ear wire produced by the mask according to claim 14, wherein the ear wire clamping and conveying mechanism further comprises a clamping and driving mechanism for driving the wire clamping mechanism to clamp and open, wherein the clamping and driving mechanism comprises two groups of pushing blocks arranged on the frame, one group of pushing blocks is arranged at the position where the ear wire conveying mechanism and the ear wire clamping and conveying mechanism are connected, and the other group of pushing blocks is arranged at the position where the ultrasonic welding head is crossed; the push block extends horizontally, a circular arc-shaped guide surface is arranged at a position corresponding to the clamping rod, and when the clamping rod rotates to the state that the end part of the clamping rod, far away from the groove, is in contact with the guide surface on the push block; the clamping rod is separated from the side wall of the groove by overcoming the elasticity of the elastic piece.

16. The ear line continuous welding device for mask production according to claim 15, wherein a sliding mechanism is arranged between the two ends of the rotating shaft and the frame, the sliding mechanism comprises a sliding block arranged on the rotating shaft and a sliding groove arranged on the frame, wherein the two ends of the rotating shaft are rotatably connected to the sliding block, the sliding block is mounted on the sliding groove, a second spring is arranged between the lower end of the sliding block and the bottom of the sliding groove, one end of the second spring acts on the bottom of the sliding block, and the other end of the second spring acts on the bottom of the sliding groove.

17. The ear line continuous welding device for mask production according to claim 16, wherein the two sets of the line clamping mechanism and the pressing head are alternately provided on the rotary wheel along the rotation direction of the rotary wheel.

18. A mask production line comprising an ear line continuous welding apparatus for mask production according to any one of claims 1 to 17.

19. A welding method for the ear wire continuous type welding apparatus for mask production according to claim 1, comprising the steps of: