Automatic mask ear band spot welding mechanism

Abstract

The utility model discloses an air cylinder automatic mask ear band spot welding mechanism which comprises a machine frame, a first servo air cylinder which moves up and down is fixedly arranged in the middle of the machine frame, a second servo air cylinder is fixedly arranged on the outer side of the first servo air cylinder, the second servo air cylinder is fixedly connected with a spot welding head, and the spot welding head is further connected with the first servo air cylinder in a sliding mode through a sliding groove. A working platform is further fixedly arranged below the spot welding head and right opposite to the first servo air cylinder, a conveying belt is further arranged around the periphery of the working platform, deviation rectifying plates are further arranged on the two sides of the machine frame, and a groove is formed in the conveying belt in the moving direction of the conveying belt. A set of photoelectric switches are arranged in the grooves and correspond to the first servo air cylinders respectively and used for detecting the position of the mask, automatic spot welding and feeding and discharging work of the mask ear bands can be achieved by introducing a PLC control system, and efficiency and accuracy are improved.

Description

Technical Field

[0001] The utility model relates to the field of mask production, and in particular to a spot welding mechanism for mask ear straps. Background Art

[0002] Disposable masks are usually made of non-woven raw materials, requiring non-woven fabrics, meltblown fabrics, nose bridge strips and ear straps and other materials. Subsequently, the ear straps are fixed to the mask body using a mask sheeting machine and an ear strap spot welding machine to complete the product. Ear strap spot welding requires the ear straps to be aligned with the welding points, and welding is completed using methods including melting and ultrasonic waves.

[0003] Utility model patent number CN221112893U discloses a precision spot welding device for mask production, which achieves simultaneous spot welding of both ends of the ear straps, thereby improving production efficiency. However, in terms of effectiveness, manual operation is still required to spot weld each mask twice, which is not very automated and requires further improvement. Summary of the Invention

[0004] The present invention aims to provide an automatic mask ear strap spot welding mechanism, which is used to solve the problems of low efficiency and poor precision of manual spot welding and further realize the automation of mask spot welding.

[0005] To achieve the above objectives, the technical solutions provided by the present invention include:

[0006] A cylinder automatic mask ear strap spot welding mechanism includes a frame, a first servo cylinder that moves up and down is fixedly arranged in the middle of the frame, a second servo cylinder is fixedly arranged outside the first servo cylinder, the second servo cylinder is fixedly connected to a spot welding head, the spot welding head and the first servo cylinder are also slidably connected through a slide groove, a working platform is fixedly arranged below the spot welding head and opposite to the first servo cylinder, and the first servo cylinder, the second servo cylinder and the spot welding head are electrically connected to a PLC control system.

[0007] Furthermore, a conveyor belt is provided around the periphery of the working platform, a driving shaft of the conveyor belt is connected to the main shaft of the servo motor, and the servo motor is electrically connected to the PLC control system.

[0008] Furthermore, correction plates are provided on both sides of the frame, and the relative distance between the correction plates is adapted to the shape of the mask, preferably the width of the mask body.

[0009] Furthermore, the conveyor belt is provided with grooves along its movement direction, and a group of photoelectric switches are respectively provided in the grooves corresponding to the first servo cylinders. The photoelectric switches detect the position of the mask on the conveyor belt, and the photoelectric switches are electrically connected to the PLC control system.

[0010] Furthermore, a limit block is provided on the outside of the first servo cylinder, and the limit block limits the movement of the second servo cylinder.

[0011] Furthermore, the spot welding head is an ultrasonic spot welding head.

[0012] The advantages and beneficial effects of the present invention are:

[0013] An automated mask ear strap spot welding mechanism is provided. The mask body is pressed by a first servo cylinder, and the second servo cylinder pushes the spot welding head to weld the mask ear strap and the mask body on a work platform, greatly improving the degree of automation in mask production.

[0014] By introducing a PLC control system and a servo motor-driven conveyor belt loading and unloading mechanism in conjunction with a correction plate to accurately transport masks, two sets of photoelectric switches are used to monitor the position of the mask and the position of the first servo cylinder and provide feedback to the PLC control system to adjust the up and down movement of the second servo cylinder to drive the spot welding head, thereby further improving the efficiency of mask spot welding.

[0015] By using an ultrasonic spot welding head and achieving welding through frictional heat caused by high-frequency vibration, the mask and ear straps can be effectively bonded together without the use of glue or other adhesives, avoiding the health risks brought about by the introduction of adhesives. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is one of the structural diagrams of the present utility model;

[0017] Figure 2 This is the second structural diagram of the present utility model;

[0018] Figure 3 It is a schematic cross-sectional structural diagram of the present utility model;

[0019] Figure 4 This is a schematic diagram of the placement structure of the mask ear straps;

[0020] In the picture:

[0021] 1-frame, 2-first servo cylinder, 3-second servo cylinder, 4-spot welding head, 5-chute, 6-working platform, 7-conveyor belt, 8-correction plate, 9-groove, 10-photoelectric switch, 11-limit block. DETAILED DESCRIPTION

[0022] The following embodiments are further described in conjunction with the accompanying drawings and examples. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention and are not intended to limit the scope of protection of the present invention. Example

[0023] See also Figures 1 to 3 A cylinder automatic mask ear strap spot welding mechanism includes a frame 1, a first servo cylinder 2 that moves up and down is fixedly installed in the middle of the frame 1, a second servo cylinder 3 is fixedly installed outside the first servo cylinder 2, and four spot welding heads 4 are fixedly connected to the second servo cylinder 3. The spot welding heads 4 slide along the chute 5 set in the first servo cylinder 2. A working platform 6 is also fixedly installed below the spot welding heads 4 and opposite the first servo cylinder 2. Correction plates 8 are also installed on both sides of the frame 1. The relative distance between the correction plates 8 is adapted to the size of the mask, and can preferably be the width of the mask body. A servo motor-driven conveyor belt 7 is also provided around the working platform 6. The conveyor belt 7 has grooves 9 along its direction of movement. A group of photoelectric switches 10 are installed in the grooves 9 corresponding to the first servo cylinder 2. The photoelectric switches 10 are used to detect the position of the mask on the conveyor belt 7; a limit block 11 is also provided outside the first servo cylinder 2; the spot welding heads 4 are preferably ultrasonic spot welding heads. The first servo cylinder 2, the second servo cylinder 3, the servo motor connected to the conveyor belt 7 and the two sets of photoelectric switches are respectively connected to the PLC control system through circuits. The relative position of the spot welding head 4 is adapted to the welding points of the mask and the ear strap.

[0024] Put the mask and ear straps in Figure 4 Place it, apply glue at the position of the ear strap and the four welding points for preliminary fixation, match the ear strap with the welding points and put it on the normally open conveyor belt 7. When the conveyor belt 7 transfers the mask and ear strap to the working platform 6, the photoelectric switch 10 detects that the mask enters the top of the working platform 6 from the conveyor belt, and sends a signal to the PLC control system. The PLC control system receives the signal, and the conveyor belt 7 connected to the servo motor stops. At the same time, the first servo cylinder 2 receives the PLC control system signal, moves downward, and presses the mask and ear strap together with the working platform. The PLC control system sends a signal to adjust the second servo cylinder 3 to move downward. Since the second servo cylinder 3 is slidingly connected to the spot welding head 4, the spot welding head 4 moves downward along the slide 5 to press the welding point for spot welding. During work, in order to prevent the spot welding head from being over-tightened so that the ultrasonic spot welding will spot weld the mask to the conveyor belt together, or the spot welding head and the mask are too tightly adhered to the mask and cause damage to the mask, a limit block 11 is also provided on the outside of the first servo cylinder 2 to limit the working depth of the spot welding head; the PLC presets the working time of the spot welding head 4. After the spot welding head 4 completes the work, the PLC control system adjusts the second servo cylinder 3 and the first servo cylinder 2 to move upward in succession. The second servo cylinder 3 moves upward first while the first servo cylinder 2 keeps pressing the mask to prevent the ultrasonic spot welding head from adhering to the welding spot. After the first servo cylinder 2 moves upward and resets, the PLC control system sends a signal to resume the movement process of the conveyor belt 7, and the masks that have been spot welded are unloaded from the other side of the conveyor belt.

[0025] The spot welding mechanism provided in this embodiment has a simple structure, a high degree of automation and working efficiency, and can further adapt to the speed at which different operators place masks and ear straps to a working state.

[0026] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. An automatic mask ear strap spot welding mechanism, comprising a frame, characterized in that: A first servo cylinder that moves up and down is fixedly set in the middle of the frame, a second servo cylinder is fixedly set on the outside of the first servo cylinder, the second servo cylinder is fixedly connected to the spot welding head, the spot welding head slides along the slide groove set by the first servo cylinder, and a working platform is fixedly set below the spot welding head opposite to the first servo cylinder. The first servo cylinder, the second servo cylinder and the spot welding head are electrically connected to the PLC control system.

2. The automatic mask ear strap spot welding mechanism according to claim 1, characterized in that: A conveyor belt is also provided around the periphery of the working platform, a driving shaft of the conveyor belt is connected to the main shaft of the servo motor, and the servo motor is electrically connected to the PLC control system.

3. The automatic mask ear strap spot welding mechanism according to claim 1, characterized in that: Deflection correcting plates are also provided on both sides of the frame, and the relative distance between the deflection correcting plates is adapted to the size of the mask.

4. The automatic mask ear strap spot welding mechanism according to claim 3, characterized in that: The relative distance of the correction plates is the width of the mask.

5. The automatic mask ear strap spot welding mechanism according to claim 2, characterized in that: The conveyor belt is provided with grooves along its movement direction, and a group of photoelectric switches are respectively provided in the grooves corresponding to the first servo cylinders. The photoelectric switches detect the position of the masks on the conveyor belt, and the photoelectric switches are electrically connected to the PLC control system.

6. The automatic mask ear strap spot welding mechanism according to claim 1, characterized in that: A limit block is also provided on the outside of the first servo cylinder.

7. The automatic mask ear strap spot welding mechanism according to claim 1, characterized in that: The spot welding head is an ultrasonic spot welding head.

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