Equipment and method for producing nonwoven filter bags

Abstract

This invention relates to the field of filter bag production equipment technology, and more particularly to a production equipment and method for nonwoven filter bags. The equipment includes two counter-rotating drive rollers, with nonwoven fabric disposed between the two drive rollers. The production equipment also includes a first disc, on which a clamping assembly and a cylinder are mounted. The cylinder has a notch, and the clamping assembly is located at the notch. The clamping assembly includes a left clamping bar and a right clamping bar, which can close and open. When the clamping assembly is closed, its outer edge rests on a ring formed by the outer edge of the cylinder. The produced nonwoven fabric is conveyed by the two counter-rotating drive rollers. The nonwoven fabric output from the drive rollers is sent to the clamping assembly by a traction assembly. The clamping assembly clamps the end of the nonwoven fabric using the left and right clamping bars. Then, the cylinder and the clamping assembly rotate 360° clockwise synchronously, thereby achieving a closed loop of the nonwoven fabric outside the cylinder, with the rear end of the nonwoven fabric aligned with the end of the inclined plate.

Description

Technical Field

[0001] This invention relates to the field of filter bag production equipment technology, specifically to a production equipment and method for non-woven filter bags. Background Technology

[0002] Non-woven filter bags are filter structures used to filter impurities in liquids, for example, such as... Figure 1 As shown, the first step is to wind the produced strip of nonwoven fabric 1 into a tubular shape. The second step is to weld the two wide sides of the tubular nonwoven fabric 1 together using an ultrasonic welding machine to achieve a closed loop. The third step is to fit one side opening of the tubular nonwoven fabric 1 onto a PP ring, which is a stepped circular ring. The fourth step is to weld the tubular nonwoven fabric 1 onto the PP ring again using an ultrasonic welding machine. The fifth step is to close the other end of the tubular nonwoven fabric 1. The closing action can also be achieved by using an ultrasonic welding machine.

[0003] In the existing technology, a lot of manual operation is required in the first to fourth steps, such as winding the strip of non-woven fabric 1 into a tube and putting one side opening of the tube of non-woven fabric 1 onto the PP ring, which seriously restricts the production efficiency of non-woven filter bags. If the strip of non-woven fabric 1 can be automatically wound into a tube by mechanical means and then automatically put onto the PP ring, the production efficiency can be greatly improved.

[0004] To achieve the above-mentioned mechanical production method, the main problem is that the nonwoven fabric 1 will hang downwards under the action of gravity, so that one end of the tubular nonwoven fabric 1 cannot form a neat ring, that is, one end of the tubular nonwoven fabric 1 cannot completely match the PP ring. When the tubular nonwoven fabric 1 is put on the PP ring, the PP ring is prone to contact with the tubular nonwoven fabric 1, making it difficult for the PP ring to enter the inner side of the tubular nonwoven fabric 1.

[0005] Therefore, a production equipment and method for nonwoven filter bags is proposed to address the above problems. Summary of the Invention

[0006] The purpose of this invention is to provide a production equipment and method for nonwoven filter bags to solve the problem mentioned in the background art: "In order to achieve efficient production, the nonwoven fabric will hang downward under the action of gravity, so that one end of the tubular nonwoven fabric cannot form a neat ring, that is, one end of the tubular nonwoven fabric cannot completely match the PP ring. When the tubular nonwoven fabric is put on the PP ring, the PP ring is easy to collide with the tubular nonwoven fabric, making it difficult for the PP ring to enter the inner side of the tubular nonwoven fabric 1."

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] A production device for nonwoven filter bags includes two counter-rotating drive rollers, with nonwoven fabric disposed between the two drive rollers. The production device also includes a first disc, on which a clamping assembly and a cylinder are disposed. The cylinder has a notch, and the clamping assembly is disposed at the notch. The clamping assembly includes a left clamping bar and a right clamping bar, which can be closed and opened. When the clamping assembly is closed, the outer edge of the clamping assembly rests on a ring formed by the outer edge of the cylinder. The production device also includes a traction assembly that can move left and right, through which the nonwoven fabric brought out by the drive rollers is fed into the clamping assembly.

[0009] The left and right clamping bars and the rear end of the cylinder are all connected by hinges to inclined plates that can tilt inward into the cylinder. The inclined plates are provided with inclined parts. In the initial state, the projections of the multiple inclined plates on the first disk are evenly distributed. The ring formed by the outer edges of the multiple inclined plates is concentric with the outer edge of the cylinder and has the same diameter.

[0010] The rear end of the inclined plate is slidably connected to a second disk, and two support rods are slidably connected to the second disk. PP rings are attached to the outer sides of the two support rods. The second disk can drive the PP rings to move forward and abut against the inclined plate. The upper end of the inclined plate is slidably connected to a first ultrasonic welding machine.

[0011] A second ultrasonic welding machine for achieving closed-loop welding of nonwoven fabric is slidably installed on the upper left side of the clamping assembly, and a cutting blade is slidably installed on the lower left side of the clamping assembly.

[0012] In the initial state, the clamping component is located on the far left of the cylinder. The clamping component and the traction component are set in parallel. The produced nonwoven fabric is conveyed by two opposing drive rollers. The nonwoven fabric output by the drive rollers is sent to the clamping component by the traction component. The clamping component clamps the end of the nonwoven fabric by the left and right clamping bars. Then, the cylinder and the clamping component rotate 360° clockwise in sync, so that the nonwoven fabric on the outside of the cylinder is closed. During winding, the rear end of the nonwoven fabric is aligned with the end of the inclined plate.

[0013] The second ultrasonic welding machine moves downward under the action of the second electric push rod to weld the closed loop of the tubular nonwoven fabric into a whole. Then, the cutting knife moves upward under the action of the fourth electric push rod to cut and separate the completed tubular nonwoven fabric from the nonwoven fabric under the transmission roller. Then, the fifth electric push rod moves forward, which can drive the PP ring to move forward. The forward movement of the PP ring will gradually come into contact with the inclined plate. Under the action of the inclined part on the inclined plate, it will tilt towards the inside of the cylinder. When the tilting occurs, the PP ring will continuously enter the inside of the tubular nonwoven fabric, so that the tubular nonwoven fabric will continuously be wrapped around the PP ring. During the wrapping process, the inclined plate and the PP ring will continuously provide relay support to the outer tubular nonwoven fabric, thereby preventing the nonwoven fabric from drooping downward under the action of gravity. The PP ring is prone to contact with the tubular nonwoven fabric, making it difficult for the PP ring to enter the inside of the tubular nonwoven fabric.

[0014] After the PP ring enters the inside of the non-woven fabric, the first ultrasonic welding machine moves downward under the action of the third electric push rod to achieve the welding of the PP ring and the cylindrical non-woven fabric. The welding needs to be performed multiple times. After each welding, the cylinder rotates a certain distance and then the welding is performed again until the closed-loop welding is completed. The second disc moves backward to pull out the non-woven filter bag after the welding is completed.

[0015] Preferably, the top end of the first ultrasonic welding machine is fixedly connected to the movable end of the third electric push rod, the top end of the second ultrasonic welding machine is fixedly connected to the movable end of the second electric push rod, the bottom end of the cutting blade is fixedly connected to the movable end of the fourth electric push rod, the rear end of the second disc is fixedly connected to the movable end of the fifth electric push rod, and the bottom end of the traction assembly is fixedly connected to the movable end of the first electric push rod.

[0016] Preferably, an outer support ring is rotatably connected to the outer side of the first disk via a bearing. A second motor is fixedly connected to one end of the outer support ring. A gear is fixedly connected to the end of the main shaft of the second motor. A gear ring is fixedly connected to the outer side of the first disk. The gear meshes with the gear ring, and the first disk is rotated by the rotation of the second motor.

[0017] Under the above configuration, the first disc is supported by an outer support ring. The first disc rotates by the rotation of the second motor, which drives the gear to rotate. The rotation of the gear drives the first disc to rotate through the gear ring, thereby realizing the rotation of the cylinder and the clamping assembly.

[0018] Preferably, a second connecting plate is fixedly connected to the left clamping bar, the right clamping bar, and the cylinder, and a first connecting plate is fixedly connected to the inclined plate. A telescopic rod is rotatably connected between the second connecting plate and the first connecting plate via a hinge. A second spring is provided on the outer side of the telescopic rod, and the two ends of the second spring are fixedly connected to the first connecting plate and the second connecting plate, respectively.

[0019] Under the above configuration, the inclined plate of the present invention is installed on the left clamping bar, the right clamping bar and the cylinder. When the inclined plate comes into contact with the PP ring and moves toward the inside of the cylinder, the second spring will be compressed. The telescopic rod is used to compensate for distance and angle. When the contact disappears, the inclined plate will be reset under the action of the second spring.

[0020] Preferably, a slot is provided on the inner side of the first disc, and the left and right clamping bars are slidably disposed in the slot. A first motor is fixedly connected inside the first disc, and a first screw is fixedly connected to the end of the main shaft of the first motor. The threads on the left and right sides of the first screw are opposite in direction, and the left and right sides of the first screw are respectively spirally connected to the inner sides of the left and right clamping bars.

[0021] Under the above settings, the working method of the clamping component in this invention is as follows: the rotation of the first motor will drive the first screw to rotate. Because the threads on the left and right sides of the first screw are opposite, the rotation of the first screw will drive the left and right clamping bars on both sides to move closer or separate. When the left and right clamping bars move closer, they can clamp the non-woven fabric sent by the traction component.

[0022] Preferably, the traction assembly includes a support plate, with a sixth electric push rod fixedly connected to both the front and rear ends of the support plate. A pressure plate is fixedly connected to the movable end of the sixth electric push rod, and the pressure plate can move downward to fit against the support plate. A slide plate is slidably connected to the inner side of the top of the support plate, and a limit rod is slidably connected to the inner side of the top of the pressure plate. The outer side of the limit rod is slidably connected to the inner side of the slide plate, and a first spring is provided on the outer side of the limit rod. The two ends of the first spring are fixedly connected to one end of the slide plate and the inner side of the top of the support plate, respectively.

[0023] Under the above settings, the working method of the traction component is as follows: because a sixth electric push rod is provided between the support plate and the pressure plate, when the sixth electric push rod retracts, the pressure plate can move downward and fit against the support plate to clamp the non-woven fabric, and the movable end of the first electric push rod extends, thereby realizing the feeding of the non-woven fabric.

[0024] A sliding plate is slidably connected to the top inner side of the support plate. During the fabric feeding process, the sliding plate will enter the inner side of the support plate after it comes into contact with the left clamping strip. The non-woven fabric on the upper side of the sliding plate will continue to move forward, thereby feeding the non-woven fabric between the left clamping strip and the right clamping strip.

[0025] Preferably, the traction assembly includes a support plate, and a sixth electric push rod is fixedly connected to both the front and rear ends of the support plate. A pressure plate is fixedly connected to the movable end of the sixth electric push rod. The pressure plate can move downward and fit against the support plate. The upper surface of the support plate is concave, and the lower surface of the pressure plate is concave.

[0026] In the above configuration, the upper surface of the support plate can be set in a concave shape, and the lower surface of the pressure plate can be set in an upward concave shape. Thus, when the support plate and the pressure plate clamp the non-woven fabric, the non-woven fabric needs to extend beyond the support plate and the pressure plate by a certain distance. The non-woven fabric will form an upward-opening arch, thereby increasing the non-woven fabric's ability to resist gravity and preventing the extended part of the non-woven fabric from drooping downward. When the first electric push rod feeds the material, the arched non-woven fabric can directly enter between the left and right clamping strips to achieve feeding.

[0027] Preferably, a third motor is fixedly connected at the middle position of the second disk, and a second screw is fixedly connected to the two ends of the two main shafts of the third motor. A slider is fixedly connected to the outside of the second screw, and one end of the slider is fixedly connected to the support rod.

[0028] Under the above configuration, the second disc clamps the support rod in the following way: the third motor drives the second screw to rotate, the rotation of the second screw will drive the slider to move, and the slider will drive the support rod to press against the inner side of the PP ring to achieve fixation;

[0029] Preferably, an air outlet is fixedly connected to the top of the first disc, the outlet end of the air outlet is arc-shaped, and the air outlet is located at the end of the cylinder.

[0030] In the above configuration, an air outlet is fixedly connected to the top of the first disc. During the process of the PP ring entering the inner side of the tubular nonwoven fabric, the fan inside the air outlet works. When the air blown by the fan passes through the inclined plate, the nonwoven fabric outside the inclined plate will have a force moving in the direction of the air flow due to the influence of the gas flow, that is, there is a force away from the cylinder. This further prevents the nonwoven fabric from drooping due to gravity and failing to form a neat annular port, and reduces the problem that the gaps between the inclined plates may not provide effective support when only supported by the inclined plates.

[0031] During the operation of the air outlet, the non-woven fabric will experience slight vibrations due to the gas flow. This vibration can play a similar role to tamping, increasing the convenience and neatness of the non-woven fabric being placed on the PP ring.

[0032] A production method for a nonwoven filter bag production equipment, comprising the following steps:

[0033] S1: The finished nonwoven fabric is conveyed by two opposing drive rollers, and the nonwoven fabric output by the drive rollers is sent to the clamping assembly by the traction assembly.

[0034] S2: The clamping assembly clamps the end of the nonwoven fabric with the left and right clamping bars. Then, the cylinder and the clamping assembly rotate 360° clockwise in sync, so that the nonwoven fabric on the outside of the cylinder is closed.

[0035] S3: The second ultrasonic welding machine moves downward under the action of the second electric push rod to weld the closed loop of the tubular nonwoven fabric into a whole. The cutting knife moves upward under the action of the fourth electric push rod to achieve the cutting and separation of the completed tubular nonwoven fabric from the nonwoven fabric under the transmission roller.

[0036] S4: The fifth electric push rod drives the PP ring to move forward, the air pump works, the forward movement of the PP ring will gradually come into contact with the inclined plate, the PP ring will continuously enter the inner side of the tubular non-woven fabric, so that the tubular non-woven fabric will continuously wrap around the PP ring.

[0037] S5: After the PP ring enters the inner side of the nonwoven fabric, the first ultrasonic welding machine moves downward under the action of the third electric push rod to achieve the welding of the PP ring to the tubular nonwoven fabric.

[0038] Compared with the prior art, the beneficial effects of the present invention are:

[0039] 1. In the initial state, the clamping component is located at the far left of the cylinder. The clamping component and the traction component are set in parallel. The produced nonwoven fabric is conveyed by two opposing drive rollers. The nonwoven fabric output by the drive rollers is sent to the clamping component by the traction component. The clamping component clamps the end of the nonwoven fabric by the left and right clamping strips. Then, the cylinder and the clamping component rotate 360° clockwise in sync, so that the nonwoven fabric on the outside of the cylinder achieves a closed loop. During winding, the rear end of the nonwoven fabric is aligned with the end of the inclined plate.

[0040] 2. In this nonwoven filter bag production equipment, the second ultrasonic welding machine moves downward under the action of the second electric push rod to weld the closed loop of the tubular nonwoven fabric into a whole. Then, the cutting knife moves upward under the action of the fourth electric push rod to cut and separate the completed tubular nonwoven fabric from the nonwoven fabric under the transmission roller. Then, the fifth electric push rod moves forward, which can drive the PP ring to move forward. The forward movement of the PP ring will gradually come into contact with the inclined plate. Under the action of the inclined part on the inclined plate, it will tilt towards the inside of the cylinder. When the tilting occurs, the PP ring will continuously enter the inside of the tubular nonwoven fabric, so that the tubular nonwoven fabric will continuously be wrapped around the PP ring. During the wrapping process, the inclined plate and the PP ring will continuously provide relay support to the outer tubular nonwoven fabric, thereby preventing the nonwoven fabric from drooping downward under the action of gravity. The PP ring is prone to contact with the tubular nonwoven fabric, making it difficult for the PP ring to enter the inside of the tubular nonwoven fabric.

[0041] 3. In this non-woven filter bag production equipment, after the PP ring enters the inner side of the non-woven fabric, the first ultrasonic welding machine moves downward under the action of the third electric push rod to realize the welding of the PP ring to the cylindrical non-woven fabric. During welding, it needs to be performed multiple times. After each welding, the cylinder rotates a certain distance and then welding is performed again until the closed-loop welding is completed. The second disc moves backward to pull out the non-woven filter bag after welding.

[0042] 4. In the production equipment for nonwoven filter bags, the inclined plate of the present invention is installed on the left clamping strip, the right clamping strip and the cylinder. When the inclined plate comes into contact with the PP ring and moves towards the inside of the cylinder, the second spring will be compressed. The telescopic rod is used to compensate for distance and angle. When the contact disappears, the inclined plate will be reset under the action of the second spring.

[0043] 5. The production equipment for nonwoven filter bags, wherein the working mode of the traction component is as follows: because a sixth electric push rod is provided between the support plate and the pressure plate, when the sixth electric push rod retracts, the pressure plate can move downward and fit against the support plate to clamp the nonwoven fabric, and the movable end of the first electric push rod extends, thereby realizing the feeding of the nonwoven fabric. A sliding plate is slidably connected to the inner side of the top of the support plate. During the feeding process, after the sliding plate abuts against the left clamping strip, it will enter the inner side of the support plate, and the nonwoven fabric on the upper side of the sliding plate will continue to move forward, thereby feeding the nonwoven fabric between the left clamping strip and the right clamping strip.

[0044] 6. In the production equipment for nonwoven filter bags, the upper surface of the support plate is further recessed, and the lower surface of the pressure plate is recessed. Thus, when the support plate and pressure plate clamp the nonwoven fabric, the nonwoven fabric needs to extend beyond the support plate and pressure plate by a certain distance, resulting in an upward-opening arch shape. This increases the nonwoven fabric's ability to resist gravity, preventing the extended portion from drooping downwards. When the first electric push rod feeds the material, the arched nonwoven fabric can directly enter between the left and right clamping strips, achieving feeding.

[0045] 7. In this non-woven filter bag production equipment, an air outlet cylinder is fixedly connected to the top of the first disc. During the process of the PP ring entering the inner side of the cylindrical non-woven fabric, the fan inside the air outlet cylinder is activated. When the air blown by the fan passes through the inclined plate, the non-woven fabric outside the inclined plate will have a force moving in the direction of the gas flow due to the influence of the gas flow, that is, a force moving away from the cylinder. This further prevents the non-woven fabric from sagging due to gravity and failing to form a neat annular port. It also reduces the problem that the gaps between the inclined plates may not provide effective support when supported only by the inclined plates. During the operation of the air outlet cylinder, the non-woven fabric will experience slight vibration due to the influence of the gas flow. This vibration can play a similar role to tamping, increasing the convenience and neatness of the non-woven fabric being fitted onto the PP ring. Attached Figure Description

[0046] Figure 1 This is a schematic diagram of the production structure of the existing nonwoven filter bag;

[0047] Figure 2 This is a schematic diagram of the overall structure of the present invention;

[0048] Figure 3 This is a front view structural diagram of the present invention;

[0049] Figure 4 This is a side view of the mounting structure of the present invention;

[0050] Figure 5 This is a schematic diagram of the external structure of the cylindrical part of the present invention;

[0051] Figure 6 This is a schematic diagram of the external structure of the clamping strip of the present invention when it is closed;

[0052] Figure 7 This is a schematic diagram of the external structure of the clamping bar of the present invention when it is opened;

[0053] Figure 8 This is a schematic diagram of the internal mounting structure of the disc of the present invention;

[0054] Figure 9 For the present invention Figure 8 Schematic diagram of the installation structure at point A in the diagram;

[0055] Figure 10 This is a schematic diagram of the installation structure at the traction component of the present invention;

[0056] Figure 11 This is a schematic diagram of the external structure of the traction component of the present invention;

[0057] Figure 12 This is a schematic diagram of the structure of the pressure plate and support plate of the traction component of the present invention;

[0058] Figure 13 This is a schematic diagram of the distribution structure of the inclined plate on the cylinder and clamping strip of the present invention;

[0059] Figure 14 This is a schematic diagram of the installation structure at the air blowing cylinder of the present invention;

[0060] Figure 15 This is a schematic diagram of the cross-sectional structure of the air blowing tube in this invention.

[0061] In the diagram: 1. Non-woven fabric; 2. PP ring; 3. First ultrasonic welding machine; 4. Transmission roller; 5. First electric push rod; 6. Traction assembly; 7. Second ultrasonic welding machine; 8. Second electric push rod; 9. Third electric push rod; 10. Air outlet; 11. Fourth electric push rod; 12. Clamping assembly; 13. Cylinder; 14. First disc; 15. Second motor; 16. Gear; 17. Outer support ring; 18. Inclined plate; 19. Inclined part; 20. First connecting plate; 21. Telescopic rod; 22. Second spring; 23. Second disc; 24. Third motor; 25. Slider; 26. Second screw; 27. Fifth electric push rod; 28. Support rod; 29. ​​Cutting knife; 30. Second connecting plate.

[0062] 61. Support plate; 62. Limiting rod; 63. First spring; 64. Pressure plate; 65. Slide plate; 66. Sixth electric push rod;

[0063] 121. Left clamping bar; 122. Right clamping bar; 123. First motor; 124. First screw; 125. Empty slot.

[0064] The arrow in the image points forward. Detailed Implementation

[0065] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example 1

[0066] Please see Figures 1-11 and Figure 13 The present invention provides a technical solution:

[0067] A production device for nonwoven filter bags includes two counter-rotating drive rollers 4, with nonwoven fabric 1 disposed between the two drive rollers 4. The production device also includes a first disc 14, on which a clamping assembly 12 and a cylinder 13 are disposed. The cylinder 13 has a notch, and the clamping assembly 12 is disposed at the notch. The clamping assembly 12 includes a left clamping bar 121 and a right clamping bar 122, which can be closed and opened. When the clamping assembly 12 is closed, the outer edge of the clamping assembly 12 is on the ring formed by the outer edge of the cylinder 13. The production device also includes a traction assembly 6 that can move left and right, which feeds the nonwoven fabric 1 brought out by the drive rollers 4 into the clamping assembly 12.

[0068] The left clamping bar 121, the right clamping bar 122, and the rear end of the cylinder 13 are all connected by hinges to inclined plates 18 that can tilt inward into the cylinder 13. Inclined portions 19 are provided on the inclined plates 18. In the initial state, the projections of multiple inclined plates 18 on the first disk 14 are evenly distributed. The ring formed by the outer edges of multiple inclined plates 18 is concentric with the outer edge of the cylinder 13 and has the same diameter.

[0069] The rear end of the inclined plate 18 is slidably connected to a second disk 23, and two support rods 28 are slidably connected to the second disk 23. PP rings 2 are attached to the outer sides of the two support rods 28. The second disk 23 can drive the PP rings 2 to move forward and resist the inclined plate 18. The upper end of the inclined plate 18 is slidably connected to a first ultrasonic welding machine 3.

[0070] A second ultrasonic welding machine 7 for achieving closed-loop welding of nonwoven fabric is slidably provided on the upper left side of the clamping assembly 12, and a cutting blade 29 is slidably provided on the lower left side of the clamping assembly 12.

[0071] In the initial state, the clamping component 12 is located at the leftmost side of the cylinder 13. The clamping component 12 is set parallel to the traction component 6. The produced nonwoven fabric 1 is conveyed by two opposing drive rollers 4. The nonwoven fabric 1 output by the drive rollers 4 is sent to the clamping component 12 by the traction component 6. The clamping component 12 clamps the end of the nonwoven fabric 1 through the left clamping bar 121 and the right clamping bar 122. Then, the cylinder 13 and the clamping component 12 rotate 360° clockwise in sync, so that the nonwoven fabric 1 on the outside of the cylinder 13 achieves a closed loop. During winding, the rear end of the nonwoven fabric 1 is aligned with the end of the inclined plate 18.

[0072] The second ultrasonic welding machine 7 moves downward under the action of the second electric push rod 8, welding the closed loop of the tubular nonwoven fabric 1 into a whole. Then, the cutting blade 29 moves upward under the action of the fourth electric push rod 11, realizing the cutting and separation of the completed tubular nonwoven fabric 1 from the nonwoven fabric 1 under the transmission roller 4. Then, the fifth electric push rod 27 moves forward, driving the PP ring 2 forward. The forward movement of the PP ring 2 will gradually come into contact with the inclined plate 18, tilting on the inclined plate 18. Under the action of part 19, it will tilt towards the inside of the cylinder 13. When tilting occurs, the PP ring 2 will continuously enter the inside of the tubular nonwoven fabric 1, so that the tubular nonwoven fabric 1 will continuously be wrapped around the PP ring 2. During the wrapping process, the tilting plate 18 and the PP ring 2 will continuously provide relay support to the outer tubular nonwoven fabric 1, thereby preventing the nonwoven fabric 1 from falling down under the action of gravity. The PP ring 2 is prone to contact with the tubular nonwoven fabric 1, making it difficult for the PP ring 2 to enter the inside of the tubular nonwoven fabric 1.

[0073] After the PP ring 2 enters the inner side of the non-woven fabric 1, the first ultrasonic welding machine 3 will move downward under the action of the third electric push rod 9 to realize the welding of the PP ring 2 and the cylindrical non-woven fabric 1. The welding needs to be performed multiple times. After each welding, the cylinder 13 rotates a certain distance and then welds again until the closed-loop welding is completed. The second disc 23 moves backward to pull out the non-woven filter bag after the welding is completed.

[0074] Specifically, the top of the first ultrasonic welding machine 3 is fixedly connected to the movable end of the third electric push rod 9, the top of the second ultrasonic welding machine 7 is fixedly connected to the movable end of the second electric push rod 8, the bottom of the cutting blade 29 is fixedly connected to the movable end of the fourth electric push rod 11, the rear end of the second disc 23 is fixedly connected to the movable end of the fifth electric push rod 27, and the bottom of the traction assembly 6 is fixedly connected to the movable end of the first electric push rod 5.

[0075] Specifically, an outer support ring 17 is rotatably connected to the outer side of the first disk 14 via a bearing. A second motor 15 is fixedly connected to one end of the outer support ring 17. A gear 16 is fixedly connected to the end of the main shaft of the second motor 15. A gear ring is fixedly connected to the outer side of the first disk 14. The gear 16 meshes with the gear ring. The rotation of the second motor 15 drives the first disk 14 to rotate.

[0076] Under the above configuration, the first disc 14 is supported by the outer support ring 17. The first disc 14 rotates by the second motor 15 rotating, which drives the gear 16 to rotate. The rotation of the gear 16 drives the first disc 14 to rotate through the gear ring, thereby realizing the rotation of the cylinder 13 and the clamping assembly 12.

[0077] Specifically, a second connecting plate 30 is fixedly connected to the left clamping bar 121, the right clamping bar 122 and the cylinder 13, and a first connecting plate 20 is fixedly connected to the inclined plate 18. A telescopic rod 21 is rotatably connected between the second connecting plate 30 and the first connecting plate 20 through a hinge. A second spring 22 is provided on the outside of the telescopic rod 21, and the two ends of the second spring 22 are fixedly connected to the first connecting plate 20 and the second connecting plate 30 respectively.

[0078] Under the above configuration, the inclined plate 18 of the present invention is installed on the left clamping bar 121, the right clamping bar 122 and the cylinder 13. When the inclined plate 18 comes into contact with the PP ring 2 and moves toward the inside of the cylinder 13, the second spring 22 will be compressed. The telescopic rod 21 is used to compensate for distance and angle. When the contact disappears, the inclined plate 18 will be reset under the action of the second spring 22.

[0079] Specifically, a slot 125 is provided on the inner side of the first disc 14, and the left clamping bar 121 and the right clamping bar 122 are slidably disposed in the slot 125. A first motor 123 is fixedly connected inside the first disc 14, and a first screw 124 is fixedly connected to the end of the main shaft of the first motor 123. The threads on the left and right sides of the first screw 124 are opposite in direction, and the left and right sides of the first screw 124 are respectively spirally connected to the inner sides of the left clamping bar 121 and the right clamping bar 122.

[0080] Under the above configuration, the working mode of the clamping component 12 in this invention is as follows: the rotation of the first motor 123 will drive the first screw 124 to rotate. Because the thread directions on the left and right sides of the first screw 124 are opposite, the rotation of the first screw 124 will drive the left clamping bar 121 and the right clamping bar 122 on both sides to move closer or separate. When the left clamping bar 121 and the right clamping bar 122 move closer, they can clamp the non-woven fabric 1 sent by the traction component 6.

[0081] Specifically, the traction assembly 6 includes a support plate 61. A sixth electric push rod 66 is fixedly connected to both the front and rear ends of the support plate 61. A pressure plate 64 is fixedly connected to the movable end of the sixth electric push rod 66. The pressure plate 64 can move downwards to fit against the support plate 61. A slide plate 65 is slidably connected to the inner side of the top of the support plate 61. A limit rod 62 is slidably connected to the inner side of the top of the pressure plate 64. The outer side of the limit rod 62 is slidably connected to the inner side of the slide plate 65. A first spring 63 is provided on the outer side of the limit rod 62. The two ends of the first spring 63 are fixedly connected to one end of the slide plate 65 and the inner side of the top of the support plate 61, respectively.

[0082] Under the above settings, the working mode of the traction component 6 is as follows: because a sixth electric push rod 66 is provided between the support plate 61 and the pressure plate 64, when the sixth electric push rod 66 retracts, the pressure plate 64 can move downward and fit against the support plate 61 to clamp the non-woven fabric 1, and the movable end of the first electric push rod 5 extends, thereby realizing the feeding of the non-woven fabric 1.

[0083] A slide plate 65 is slidably connected to the inner side of the top of the support plate 61. During the fabric feeding process, the slide plate 65 will enter the inner side of the support plate 61 after it comes into contact with the left clamping strip 121. The non-woven fabric 1 on the upper side of the slide plate 65 will continue to move forward, thereby feeding the non-woven fabric 1 between the left clamping strip 121 and the right clamping strip 122.

[0084] Specifically, a third motor 24 is fixedly connected at the middle position of the second disk 23. A second screw 26 is fixedly connected to the ends of the two main shafts of the third motor 24. A slider 25 is fixedly connected to the outside of the second screw 26. One end of the slider 25 is fixedly connected to the support rod 28.

[0085] Under the above configuration, the second disc 23 clamps the support rod 28 in the following way: the third motor 24 drives the second screw 26 to rotate, the rotation of the second screw 26 will drive the slider 25 to move, and the slider 25 will drive the support rod 28 to press against the inner side of the PP ring 2 to achieve fixation. Example 2

[0086] This embodiment is an alternative to Embodiment 1. The same parts will not be repeated; the differences are as follows: Please refer to [link to Embodiment 1]. Figures 11-12 ,

[0087] Specifically, the traction assembly 6 includes a support plate 61, with a sixth electric push rod 66 fixedly connected to both the front and rear ends of the support plate 61. A pressure plate 64 is fixedly connected to the movable end of the sixth electric push rod 66. The pressure plate 64 can move downwards and fit against the support plate 61. The upper surface of the support plate 61 is concave, and the lower surface of the pressure plate 64 is concave.

[0088] In the above configuration, the upper surface of the support plate 61 can be concave, and the lower surface of the pressure plate 64 can be concave. Thus, when the support plate 61 and the pressure plate 64 clamp the nonwoven fabric 1, the nonwoven fabric 1 needs to extend beyond the support plate 61 and the pressure plate 64 by a certain distance. The nonwoven fabric 1 will form an upward-opening arch, thereby increasing the nonwoven fabric 1's ability to resist gravity and preventing the extended part of the nonwoven fabric 1 from drooping downward. When the first electric push rod 5 feeds the material, the arched nonwoven fabric 1 can directly enter between the left clamping strip 121 and the right clamping strip 122 to achieve feeding. Example 3

[0089] This embodiment is a further improvement on embodiment 1. The identical parts will not be repeated here; please refer to [link / reference]. Figure 1-15 ,

[0090] An air outlet 10 is fixedly connected to the top of the first disc 14. The outlet end of the air outlet 10 is arc-shaped and is located at the end of the cylinder 13.

[0091] Under the above configuration, the present invention has an air outlet 10 fixedly connected to the top of the first disc 14. During the process of the PP ring 2 entering the inner side of the tubular nonwoven fabric 1, the fan inside the air outlet 10 is activated. When the air blown by the fan passes through the inclined plate 18, the nonwoven fabric 1 outside the inclined plate 18 will have a force moving in the direction of gas flow due to the influence of gas flow, that is, there will be a force away from the cylinder 13. This further prevents the nonwoven fabric 1 from drooping due to gravity and failing to form a neat annular port, and reduces the problem that the gaps between the inclined plates 18 may not provide effective support when only supported by the inclined plates 18.

[0092] During the operation of the air outlet 10, the non-woven fabric 1 will experience slight vibration due to the influence of gas flow. This vibration can play a similar role to tamping, increasing the convenience and neatness of the non-woven fabric 1 being fitted onto the PP ring 2.

[0093] This invention also discloses a method for producing nonwoven filter bags using a production equipment, the steps of which are as follows:

[0094] S1: The finished nonwoven fabric 1 is conveyed by two opposing drive rollers 4, and the nonwoven fabric 1 output by the drive rollers 4 is sent to the clamping assembly 12 by the traction assembly 6.

[0095] S2: The clamping assembly 12 clamps the end of the nonwoven fabric 1 through the left clamping bar 121 and the right clamping bar 122. Then, the cylinder 13 and the clamping assembly 12 rotate 360° clockwise in sync, thereby making the nonwoven fabric 1 on the outside of the cylinder 13 closed loop.

[0096] S3: The second ultrasonic welding machine 7 will move downward under the action of the second electric push rod 8 to weld the closed loop of the tubular nonwoven fabric 1 into a whole. The cutting knife 29 will move upward under the action of the fourth electric push rod 11 to realize the cutting and separation of the completed tubular nonwoven fabric 1 from the nonwoven fabric 1 under the transmission roller 4.

[0097] S4: The fifth electric push rod 27 drives the PP ring 2 to move forward, the air outlet 10 works, the forward movement of the PP ring 2 will gradually come into contact with the inclined plate 18, the PP ring 2 will continuously enter the inner side of the tubular non-woven fabric 1, so that the tubular non-woven fabric 1 will continuously be wrapped around the PP ring 2.

[0098] S5: After the PP ring 2 enters the inner side of the nonwoven fabric 1, the first ultrasonic welding machine 3 will move downward under the action of the third electric push rod 9 to achieve the welding of the PP ring 2 and the tubular nonwoven fabric 1.

[0099] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A production device for nonwoven filter bags, comprising two counter-rotating drive rollers (4), wherein a nonwoven fabric (1) is disposed between the two drive rollers (4), characterized in that: The production equipment also includes a first disc (14), on which a clamping assembly (12) and a cylinder (13) are provided. The cylinder (13) has a notch, and the clamping assembly (12) is located at the notch. The clamping assembly (12) includes a left clamping bar (121) and a right clamping bar (122). The left clamping bar (121) and the right clamping bar (122) can be closed and opened. When the clamping assembly (12) is closed, the outer edge of the clamping assembly (12) is on the ring formed by the outer edge of the cylinder (13). The production equipment also includes a traction assembly (6) that can move left and right. The nonwoven fabric (1) brought out by the transmission roller (4) is fed into the clamping assembly (12) through the traction assembly (6). The left clamping bar (121), the right clamping bar (122), and the rear end of the cylinder (13) are all connected by hinges to inclined plates (18) that can tilt inward into the cylinder (13). The inclined plates (18) are provided with inclined parts (19). In the initial state, the projections of the multiple inclined plates (18) on the first disk (14) are evenly distributed. The ring formed by the outer edges of the multiple inclined plates (18) is concentric with the outer edge of the cylinder (13) and has the same diameter. The rear end of the inclined plate (18) is slidably connected to a second disk (23), and two support rods (28) are slidably connected on the second disk (23). PP rings (2) are attached to the outer sides of the two support rods (28). The second disk (23) can drive the PP rings (2) to move forward and abut against the inclined plate (18). The upper end of the inclined plate (18) is slidably connected to a first ultrasonic welding machine (3). A second ultrasonic welding machine (7) for realizing closed-loop welding of nonwoven fabric is slidably provided on the upper left side of the clamping assembly (12), and a cutting blade (29) is slidably provided on the lower left side of the clamping assembly (12). A second connecting plate (30) is fixedly connected to the left clamping bar (121), the right clamping bar (122) and the cylinder (13), and a first connecting plate (20) is fixedly connected to the inclined plate (18). A telescopic rod (21) is rotatably connected between the second connecting plate (30) and the first connecting plate (20) via a hinge. A second spring (22) is provided on the outside of the telescopic rod (21), and the two ends of the second spring (22) are fixedly connected to the first connecting plate (20) and the second connecting plate (30) respectively.

2. The nonwoven filter bag production equipment according to claim 1, characterized in that: The top end of the first ultrasonic welding machine (3) is fixedly connected to the movable end of the third electric push rod (9), the top end of the second ultrasonic welding machine (7) is fixedly connected to the movable end of the second electric push rod (8), the bottom end of the cutting blade (29) is fixedly connected to the movable end of the fourth electric push rod (11), the rear end of the second disc (23) is fixedly connected to the movable end of the fifth electric push rod (27), and the bottom end of the traction assembly (6) is fixedly connected to the movable end of the first electric push rod (5).

3. The nonwoven filter bag production equipment according to claim 2, characterized in that: An outer support ring (17) is rotatably connected to the outer side of the first disk (14) via a bearing. A second motor (15) is fixedly connected to one end of the outer support ring (17). A gear (16) is fixedly connected to the end of the main shaft of the second motor (15). A gear ring is fixedly connected to the outer side of the first disk (14). The gear (16) meshes with the gear ring. The first disk (14) is rotated by the rotation of the second motor (15).

4. The nonwoven filter bag production equipment according to claim 3, characterized in that: The first disc (14) has a slot (125) on its inner side. The left clamping bar (121) and the right clamping bar (122) are slidably disposed in the slot (125). A first motor (123) is fixedly connected inside the first disc (14). A first screw (124) is fixedly connected to the end of the main shaft of the first motor (123). The threads on the left and right sides of the first screw (124) are opposite. The left and right sides of the first screw (124) are respectively spirally connected to the inner sides of the left clamping bar (121) and the right clamping bar (122).

5. The nonwoven filter bag production equipment according to claim 4, characterized in that: The traction assembly (6) includes a support plate (61), and a sixth electric push rod (66) is fixedly connected to both the front and rear ends of the support plate (61). A pressure plate (64) is fixedly connected to the movable end of the sixth electric push rod (66). The pressure plate (64) can move downward and fit against the support plate (61). A slide plate (65) is slidably connected to the inner side of the top of the support plate (61). A limit rod (62) is slidably connected to the inner side of the top of the pressure plate (64). The outer side of the limit rod (62) is slidably connected to the inner side of the slide plate (65). A first spring (63) is provided on the outer side of the limit rod (62). The two ends of the first spring (63) are fixedly connected to one end of the slide plate (65) and the inner side of the top of the support plate (61), respectively.

6. The nonwoven filter bag production equipment according to claim 5, characterized in that: The traction assembly (6) includes a support plate (61), and a sixth electric push rod (66) is fixedly connected to both the front and rear ends of the support plate (61). A pressure plate (64) is fixedly connected to the movable end of the sixth electric push rod (66). The pressure plate (64) can move downward and fit against the support plate (61). The upper surface of the support plate (61) is concave, and the lower surface of the pressure plate (64) is concave.

7. A production equipment for nonwoven filter bags according to claim 5 or 6, characterized in that: A third motor (24) is fixedly connected at the middle position of the second disk (23). The two ends of the main shaft of the third motor (24) are fixedly connected to a second screw (26). A slider (25) is fixedly connected to the outside of the second screw (26). One end of the slider (25) is fixedly connected to the support rod (28).

8. The nonwoven filter bag production equipment according to claim 7, characterized in that: An air outlet (10) is fixedly connected to the top of the first disc (14). The outlet end of the air outlet (10) is arc-shaped and is located at the end of the cylinder (13).

9. A method for producing the nonwoven filter bag as described in claim 8, characterized in that, The steps are as follows: S1: The finished nonwoven fabric (1) is conveyed by two opposing drive rollers (4), and the nonwoven fabric (1) output by the drive rollers (4) is sent to the clamping assembly (12) by the traction assembly (6). S2: The clamping assembly (12) clamps the end of the nonwoven fabric (1) through the left clamping bar (121) and the right clamping bar (122). Then, the cylinder (13) and the clamping assembly (12) rotate 360° clockwise in sync, thereby achieving a closed loop of the nonwoven fabric (1) on the outside of the cylinder (13). S3: The second ultrasonic welding machine (7) will move downward under the action of the second electric push rod (8) to weld the closed loop of the tubular nonwoven fabric (1) into a whole. The cutting knife (29) will move upward under the action of the fourth electric push rod (11) to realize the cutting and separation of the completed tubular nonwoven fabric (1) from the nonwoven fabric (1) under the transmission roller (4). S4: The fifth electric push rod (27) drives the PP ring (2) to move forward, the air outlet (10) works, the forward movement of the PP ring (2) will gradually come into contact with the inclined plate (18), the PP ring (2) will continuously enter the inner side of the tubular non-woven fabric (1), so that the tubular non-woven fabric (1) will continuously be wrapped around the PP ring (2). S5: After the PP ring (2) enters the inner side of the nonwoven fabric (1), the first ultrasonic welding machine (3) will move downward under the action of the third electric push rod (9) to realize the welding of the PP ring (2) and the tubular nonwoven fabric (1).

Images