An automatic screen pressing machine and a method for pressing a screen

Abstract

The present invention discloses an automatic screen pressing machine and a method for pressing a screen. The key points of the technical solution include a machine table, a turntable is provided on the machine table, a plurality of workstations are provided on the turntable, and a screen frame feeding device for conveying the screen frame to the workstations, a mesh belt feeding device for driving the movement of the mesh belt, a screen pressing device for punching out the filter screen on the mesh belt and then pressing it onto the screen frame, and a hemming and blanking device for hemming the screen frame into a screen cover and then blanking are respectively provided on the machine table around the turntable. Most of the driving structures of the present invention adopt cylinder driving, with low cost. Through combined design with other structures, fully automated production can be achieved. Using this screen pressing machine for screen pressing can greatly improve production efficiency and reduce labor costs.

Description

Technical Field

[0001] The present invention relates to an automatic net pressing machine and a method for pressing a net thereof.

Background Art

[0002] Figures 1 to 3 As shown, a net cover 13 is used to be installed on a refrigerant filter of a refrigeration device. This kind of net cover 13 is formed by pressing a filter net 12 onto a net frame 10 and then hemming the net frame 10. Among them, the filter net 12 also needs to be punched out from a very long net belt 11. In the prior art, multiple workers operate manually, resulting in low production efficiency and high labor costs.

[0003] The present invention is made based on this situation.

Summary of the Invention

[0004] The object of the present invention is to overcome the deficiencies of the prior art and provide an automatic net pressing machine and a method for pressing a net with a simple structure, reliable performance, and capable of greatly improving production efficiency.

[0005] The present invention is realized by the following technical solutions:

[0006] An automatic net pressing machine, characterized in that: it includes a machine table 1, a turntable 6 is provided on the machine table 1, multiple workstations are provided on the turntable 6, and a net frame feeding device 2 for feeding the net frame 10 to the workstations, a net belt feeding device 3 for driving the movement of the net belt 11, a net pressing device 4 for punching out the filter net 12 on the net belt 11 and then pressing it onto the net frame 10, and a hemming and discharging device 5 for hemming the net frame 10 into a net cover 13 and discharging it are respectively provided on the machine table 1 around the turntable 6.

[0007] The automatic screen pressing machine as described above is characterized in that: the screen pressing device 4 includes a first support 401, on which an upper air cylinder 402 for punching out the filter screen 12 from the mesh belt 11 is provided. The piston rod of the upper air cylinder 402 is fixedly connected with a first fixing plate 403. On both sides of the first fixing plate 403, first fixing rods 404 are respectively fixed. The lower ends of the first fixing rods 404 are fixedly connected with a second fixing plate 405. The piston rod of a middle air cylinder 406 is fixed on the second fixing plate 405. The cylinder body of the middle air cylinder 406 is fixedly connected with a third fixing plate 407. The first fixing rods 404 pass through the third fixing plate 407. On both sides of the third fixing plate 407, second fixing rods 408 are respectively fixed. The lower ends of the second fixing rods 408 pass through the second fixing plate 405 and are fixedly connected with a fourth fixing plate 409. A lower air cylinder 410 is fixed on the fourth fixing plate 409. A first punching head 411 is fixed on the bottom surface of the fourth fixing plate 409. A vertical through hole is provided on the first punching head 411, and a first ejector core 412 for ejecting the filter screen 12 on the first punching head 411 to the mesh frame 10 is arranged in the through hole. The upper end of the first ejector core 412 is fixedly connected with the piston rod of the lower air cylinder 410.

[0008] The automatic screen pressing machine as described above is characterized in that: a first support platform 413 is provided on the first support 401. A guide post 414 is fixed on the first support platform 413. The upper end of the guide post 414 passes through the third fixing plate 407. A spring 415 for resetting the fourth fixing plate 409 is sleeved on the guide post 414. A guide plate 416 is fixed on the first support platform 413. A guide groove 417 for guiding the mesh belt 11 is provided on the guide plate 416. The mesh belt 11 passes through the guide groove 417. A counterbore 418 extending into the first support platform 413 is provided on the guide plate 416. A forming rod 419 is fixed in the counterbore 418. The forming rod 419 is arranged below the mesh belt 11. An installation post 7 for placing the mesh frame 10 is provided at each station.

[0009] The automatic screen pressing machine as described above is characterized in that: the mesh frame feeding device 2 includes a vibrating disk 201 containing a plurality of the mesh frames 10 and a conveying track 202 connected with the vibrating disk 201 for outputting the mesh frames 10. A second support platform 203 is provided at the end of the conveying track 202. A bayonet 204 communicating with the conveying track 202 and used for receiving the mesh frame 10 is provided on the second support platform 203. A clamp 205 for grasping the mesh frame 10 on the bayonet 204 is provided above the bayonet 204. Three sliding tracks 206 for the clamp 205 to contract are provided around the outside of the bayonet 204. The clamp 205 is driven to lift by a second air cylinder 207. The second air cylinder 207 is fixedly connected with the piston rod of a first air cylinder 208. The first air cylinder 208 is fixed on a support plate 209. Both the support plate 209 and the second support platform 203 are arranged on the machine table 1.

[0010] The automatic screen pressing machine as described above is characterized in that: the screen feeding device 3 includes a second support 301, a third support 302 provided on the machine table 1, and a third air cylinder 303 for driving the movement of the third support 302. The second support 301 is fixed on the machine table 1. The piston rod of the third air cylinder 303 is fixedly connected to the third support 302. A third guide rod 304 for guiding the movement of the third support 302 is provided between the second support 301 and the third support 302. A fourth air cylinder 305 is provided on the second support 301. The piston rod of the fourth air cylinder 305 is fixedly connected to a first pressing plate 306 for pressing the screen belt 11. A fifth air cylinder 307 is provided on the third support 302. The piston rod of the fifth air cylinder 307 is fixedly connected to a second pressing plate 308 for pressing the screen belt 11.

[0011] The automatic screen pressing machine as described above is characterized in that: the edge wrapping and blanking device 5 includes a fourth support 501 provided on the machine table 1. An oil cylinder 502 is fixed on the fourth support 501. The piston rod of the oil cylinder 502 is fixed with a second punching head 503. An edge wrapping hole 505 for wrapping the screen frame 10 containing the filter screen 12 into the screen cover 13 is provided on the bottom surface of the second punching head 503. A through hole 504 is horizontally provided on the side surface of the second punching head 503. A communication hole communicating with the through hole 504 is axially provided on the bottom surface of the second punching head 503. A second ejector core 507 for ejecting the screen cover 13 is provided in the communication hole. A movable rod 509 fixedly connected to the top of the second ejector core 507 is provided in the through hole 504. An air nozzle 508 for blowing out and blanking the screen cover 13 is provided on the fourth support 501.

[0012] The automatic screen pressing machine as described above is characterized in that: six of the above-mentioned workstations are symmetrically provided on the turntable 6. The screen frame feeding device 2 and the screen pressing device 4 are arranged at 90 degrees. The screen frame feeding device 2 and the edge wrapping and blanking device 5 are arranged at 150 degrees. The screen pressing device 4 and the edge wrapping and blanking device 5 are arranged at 120 degrees. A second probe 8 for detecting whether the screen frame 10 on this workstation is equipped with the filter screen 12 is further provided at the workstation between the screen pressing device 4 and the edge wrapping and blanking device 5. A third probe 9 for detecting whether there is the screen cover 13 at this workstation is provided at the workstation between the edge wrapping and blanking device 5 and the screen frame feeding device 2.

[0013] The automatic screen pressing machine as described above is characterized in that: a first probe 14 for detecting the bayonet 204 is provided on the second support table 203.

[0014] The automatic screen pressing machine as described above is characterized in that: a guide post 414 is fixed on the first support table 413, a guide sleeve 422 is provided on the fourth fixing plate 409, the lower end of the guide post 414 is fixed on the first support table 413, the upper end of the guide post 414 extends into the guide post 414, a sliding sleeve 423 extending into the guide sleeve 422 and a spring 415 for resetting the sliding sleeve 423 are provided on the guide post 414, and a plurality of balls 424 for rolling on the inner wall of the guide sleeve 422 are provided on the sliding sleeve 423; first guide rods 420 are respectively fixed on both sides of the fourth fixing plate 409, the upper ends of the first guide rods 420 pass through the first support 401, a second guide rod 421 is fixed on the fourth fixing plate 409, and a guide hole for inserting the second guide rod 421 is provided on the first support table 413.

[0015] The method for pressing the screen of the automatic screen pressing machine as described above is characterized in that: the screen frames 10 on the vibrating disk 201 are output one by one to the bayonets 204 on the second support table 203 through the conveying track 202;

[0016] The turntable 6 rotates 30 degrees each time it rotates; one of the workstations on the turntable 6 moves to the position of the clamping jaw 205, the clamping jaw 205 closes on the sliding track 206 to grab the screen frame 10 on the bayonet 204, the second cylinder 207 drives the clamping jaw 205 to lift and lower, and the first cylinder 208 drives the clamping jaw 205 to move horizontally to place the grabbed screen frame 10 on the placement post 7 of this workstation. Each time the clamping jaw 205 grabs a screen frame 10, the next screen frame 10 automatically moves to the position of the bayonet 204;

[0017] If the first probe 14 detects that the clamping jaw 205 fails to successfully grab the screen frame 10 from the bayonet 204, it will alarm and stop the machine;

[0018] After the turntable 6 continues to rotate twice for a total of 60 degrees, the turntable 6 rotates to move the position between two adjacent workstations to below the first punching head 411. The upper cylinder 402 drives the first fixing plate 403 to move downward. At the same time, the first fixing plate 403 drives the second fixing plate 405 to move together through the first fixing rod 404. The second fixing plate 405 drives the third fixing plate 407 to move together through the middle cylinder 406. The third fixing plate 407 drives the fourth fixing plate 409 to move together through the second fixing rod 408. The fourth fixing plate 409 drives the first punching head 411 to move downward to cooperate with the forming rod 419 to punch a filter screen 12 on the lower mesh belt 11;

[0019] When the first punching head 411 punches out the filter screen 12, the fourth cylinder 305 drives the first pressing plate 306 to clamp the mesh belt 11 to position the mesh belt 11. After the first punching head 411 punches out the filter screen 12, the fourth cylinder 305 drives the first pressing plate 306 to release the mesh belt 11, and the third cylinder 303 drives the third support 302 to move to drive the mesh belt 11 to move;

[0020] The turntable 6 rotates one more time, and the station equipped with the screen frame 10 rotates to the position below the first stamping head 411. The piston rod of the middle cylinder 406 retracts, driving the third fixed plate 407 to move downward. The third fixed plate 407 drives the fourth fixed plate 409 to move together through the second fixed rod 408. The fourth fixed plate 409 drives the first stamping head 411 to move downward to approach the screen frame 10 below. Then, the lower cylinder 410 drives the first core 412 to move downward to press the filter screen 12 on the first stamping head 411 onto the screen frame 10 below;

[0021] After the turntable 6 rotates three times for a total of 90 degrees, this station rotates to the position of the second probe 8. The second probe 8 detects whether the filter screen 12 is installed on the screen frame 10 at this station. If not detected, the machine will alarm and stop;

[0022] The turntable 6 rotates one more time. After rotating 30 degrees, this station rotates to the position of the edge - wrapping and blanking device 5. The oil cylinder 502 drives the second stamping head 503 to move downward to press the edge of the screen frame 10 inward to hold the filter screen 12 to form a screen cover 13. When the second stamping head 503 moves upward to reset, the second core 507 ejects the screen cover 13 to fall off. At the same time, the air nozzle 508 blows air to blow the screen cover 13 to the designated position for blanking;

[0023] After the turntable rotates twice for a total of 60 degrees, this station rotates to the position of the third probe 9. The third probe 9 detects whether there is still a screen cover 13 at this station. If detected, it will alarm and stop;

[0024] After the turntable 6 rotates three times for a total of 90 degrees, this station rotates to the position of the gripper 205. The gripper 205 grabs the screen frame 10 on the bayonet 204 to this station, and the above steps are repeated.

[0025] Compared with the prior art, the present invention has the following advantages:

[0026] 1. Most of the driving structures of the present invention adopt cylinder drive, with low cost. Through combined design with other structures, it can achieve fully automated production, greatly improving production efficiency, reducing labor costs, and bringing unexpected technical effects.

Description of the Drawings

[0027] Figure 1 is a three - dimensional view of the screen frame of the present invention;

[0028] Figure 2 is a state diagram of the filter screen pressed on the screen frame of the present invention;

[0029] Figure 3 is a three - dimensional view of the screen cover of the present invention;

[0030] Figure 4 is a three - dimensional view of the screen press of the present inventionFigure 1 ;

[0031] Figure 5 is Figure 4 an enlarged view of area A in

[0032] Figure 6 is Figure 4 a sectional view of area A in

[0033] Figure 7 is Figure 4 an enlarged view of area B in

[0034] Figure 8 is a perspective view of the web feeding device of the present invention;

[0035] Figure 9 is a perspective Figure 2 of the net pressing machine of the present invention, with some parts hidden in the figure;

[0036] Figure 10 is a sectional view of the net pressing device of the present invention.

[0037] In the figure: 1 is the machine table; 2 is the net frame feeding device; 201 is the vibrating disk; 202 is the conveying track; 203 is the second support platform; 204 is the bayonet; 205 is the clamping jaw; 206 is the sliding track; 207 is the second cylinder; 208 is the first cylinder; 209 is the support plate; 3 is the web feeding device; 301 is the second bracket; 302 is the third bracket; 303 is the third cylinder; 304 is the third guide rod; 305 is the fourth cylinder; 306 is the first pressing plate; 307 is the fifth cylinder; 308 is the second pressing plate; 4 is the net pressing device; 401 is the first bracket; 402 is the upper cylinder; 403 is the first fixing plate; 404 is the first fixing rod; 405 is the second fixing plate; 406 is the middle cylinder; 407 is the third fixing plate; 408 is the second fixing rod; 409 is the fourth fixing plate; 410 is the lower cylinder; 411 is the first punching head; 412 is the first ejector core; 413 is the first support platform; 414 is the guide post; 415 is the spring; 416 is the guide plate; 417 is the guide groove; 418 is the counterbore; 419 is the forming rod; 420 is the first guide rod; 421 is the second guide rod; 422 is the guide sleeve; 423 is the sliding sleeve; 424 is the ball; 5 is the edge wrapping and blanking device; 501 is the fourth bracket; 502 is the oil cylinder; 503 is the second punching head; 504 is the through hole; 505 is the edge wrapping hole; 507 is the second ejector core; 508 is the air nozzle; 509 is the movable rod; 510 is the travel switch; 6 is the turntable; 7 is the placement column; 8 is the second probe; 9 is the third probe; 10 is the net frame; 11 is the web; 12 is the filter screen; 13 is the net cover; 14 is the first probe; 15 is the blanking chute; 16 is the fourth probe; 17 is the fifth bracket; 510 is the travel switch.

Detailed implementation manners

[0038] The technical features of the present invention will be further described in detail below in conjunction with the accompanying drawings so that those skilled in the art can understand.

[0039] An automatic mesh pressing machine, as Figures 3 to 10 shown, includes a machine table 1. A turntable 6 is provided on the machine table 1. A plurality of workstations are provided on the turntable 6. Around the turntable 6 on the machine table 1, there are respectively provided a mesh frame feeding device 2 for conveying the mesh frame 10 to the workstations, a mesh belt feeding device 3 for driving the movement of the mesh belt 11, a mesh pressing device 4 for punching out the filter mesh 12 on the mesh belt 11 and then pressing it onto the mesh frame 10, and a hemming and discharging device 5 for hemming the mesh frame 10 into a mesh cover 13 and discharging it.

[0040] The mesh pressing device 4 punches out a filter mesh 12 on the mesh belt 11 and then mounts it on the mesh frame 10 at the workstation. Every time the mesh pressing device 4 presses a filter mesh 12, the mesh belt feeding device 3 drives the mesh belt 11 to move once. After that, the turntable 6 rotates the mesh frame 10 equipped with the filter mesh 12 to the hemming and discharging device 5, and the hemming and discharging device 5 hemms the mesh frame 10 to press it tightly on the filter mesh 12 to form a mesh cover 13. The whole process is fully automated, which can greatly improve production efficiency.

[0041] Furthermore, as shown in FIGS. 9 and Figure 10 shown, the mesh pressing device 4 includes a first support 401. An upper cylinder 402 for punching out the filter mesh 12 from the mesh belt 11 is provided on the first support 401. The piston rod of the upper cylinder 402 is fixedly connected with a first fixing plate 403. First fixing rods 404 are respectively fixed on both sides of the first fixing plate 403. The lower ends of the first fixing rods 404 are fixedly connected with a second fixing plate 405. The piston rod of a middle cylinder 406 is fixed on the second fixing plate 405. The cylinder body of the middle cylinder 406 is fixedly connected with a third fixing plate 407. The first fixing rods 404 pass through the third fixing plate 407. Second fixing rods 408 are respectively fixed on both sides of the third fixing plate 407. The lower ends of the second fixing rods 408 pass through the second fixing plate 405 and are fixedly connected with a fourth fixing plate 409. The outer shape of the fourth fixing plate 409 is more like a fixing frame. A lower cylinder 410 is fixed on the fourth fixing plate 409. A first punching head 411 is fixed on the bottom surface of the fourth fixing plate 409. A vertical through hole is provided on the first punching head 411. A first ejector core 412 for ejecting the filter mesh 12 on the first punching head 411 to the mesh frame 10 is provided in the through hole. The upper end of the first ejector core 412 is fixedly connected with the piston rod of the lower cylinder 410.

[0042] The first punching head 411 is cylindrical, Figure 9It is sectioned along the axis line of the first punch head 411. The first fixed rod 404 passes through the third fixed plate 407 without being fixedly connected to the third fixed plate 407, and both ends are fixed to the first fixed plate 403 and the second fixed plate 405; the second fixed rod 408 passes through the second fixed plate 405 without being fixedly connected to the second fixed plate 405, and both ends are respectively fixed to the third fixed plate 407 and the fourth fixed plate 409; the cylinder block of the middle cylinder 406 is fixed to the third fixed plate 407, and the piston rod of the middle cylinder 406 is fixed to the second fixed plate 405. The cylinder block of the lower cylinder 410 is fixed to the fourth fixed plate 409.

[0043] As Figure 9 shown, a first support platform 413 is provided on the first support 401, a guide plate 416 is fixed on the first support platform 413, a guide groove 417 for guiding the mesh belt 11 is provided on the guide plate 416, the mesh belt 11 passes through the guide groove 417, a counterbore 418 extending into the first support platform 413 is provided on the guide plate 416, a forming rod 419 is fixed in the counterbore 418, and the forming rod 419 is arranged below the mesh belt 11. As Figure 10 shown, when the position between adjacent two workstations rotates to be below the first punch head 411, the forming rod 419 cooperates with the first punch head 411 to punch out a filter screen 12, and the filter screen 12 will be stuck in the hole at the bottom of the first punch head 411; an placing column 7 for placing the mesh frame 10 is provided on each workstation. When the workstation rotates to be below the first punch head 411, the placing column 7 on this workstation is located between the guide plate 416 and the first punch head 411. As Figure 10 shown.

[0044] Furthermore, a guide post 414 is fixed on the first support platform 413, a guide sleeve 422 is provided on the fourth fixed plate 409, the lower end of the guide post 414 is fixed to the first support platform 413, the upper end of the guide post 414 extends into the guide post 414, a sliding sleeve 423 extending into the guide sleeve 422 and a spring 415 for resetting the sliding sleeve 423 are provided on the guide post 414, and a plurality of balls 424 for rolling on the inner wall of the guide sleeve 422 are provided on the sliding sleeve 423 to reduce the movement friction; first guide rods 420 are respectively fixed on both sides of the fourth fixed plate 409, the upper ends of the first guide rods 420 pass through the first support 401, a second guide rod 421 is fixed on the fourth fixed plate 409, and a guide hole for inserting the second guide rod 421 is provided on the first support platform 413.

[0045] The turntable 6 rotates half a station at a time. The function of the upper cylinder 402 is to drive the first punching head 411 to press on the mesh belt 11 to punch out a filter mesh 12. Then the turntable 6 rotates once to rotate the placement post 7 on the station to directly below the first punching head 411. The function of the middle cylinder 406 is to drive the first punching head 411 to approach the mesh frame 10 on the placement post 7. The function of the lower cylinder 410 is to drive the first ejector core 412 to press the filter mesh 12 stuck in the hole at the bottom of the first punching head 411 onto the mesh frame 10. The reason for setting three cylinders instead of two or one is that the stroke of the cylinders in this patent is fixed. If the middle cylinder is not set, the distance between the first punching head 411 and the mesh frame 10 on the placement post 7 is too far, and the first ejector core 412 cannot accurately press the filter mesh 12 onto the mesh frame 10.

[0046] The structure of the mesh pressing device 4 of this patent is ingeniously designed and has a relatively low cost. Cooperating with the turntable 6 can quickly punch out the filter mesh 12 and press the filter mesh 12 onto the mesh frame 10.

[0047] The mesh frame feeding device 2 includes a vibrating disk 201 containing a plurality of the mesh frames 10, a conveying track 202 connected to the vibrating disk 201 for outputting the mesh frames 10. At the end of the conveying track 202, there is a second support platform 203. On the second support platform 203, there is a bayonet 204 communicating with the conveying track 202 for receiving the mesh frame 10. After the mesh frame 10 moves to the bayonet 204, it will be blocked. The bayonet 204 can only accommodate one mesh frame 10. Above the bayonet 204, there is a clamp 205 for grasping the mesh frame 10 on the bayonet 204. Around the outside of the bayonet 204, there are three sliding tracks 206 for the clamp 205 to close. The clamp 205 is driven to move up and down by a second cylinder 207. The second cylinder 207 is fixedly connected to the piston rod of a first cylinder 208. The first cylinder 208 drives the second cylinder 207 to move horizontally. The first cylinder 208 is fixed on a support plate 209. The support plate 209 and the second support platform 203 are both arranged on the machine table 1.

[0048] The clamp 205 tightens along the sliding track 206 to clamp the mesh frame 10 on the bayonet 204. After taking away one mesh frame 10, the next mesh frame 10 automatically moves to the position of the bayonet 204. On the second support platform 203, there is a first probe 14 for detecting the bayonet 204. If the first probe 14 detects that the clamp 205 fails to grasp the mesh frame 10, it will alarm and stop the machine.

[0049] The belt loading device 3 includes a second bracket 301, a third bracket 302 provided on the machine table 1, and a third air cylinder 303 for driving the movement of the third bracket 302. The second bracket 301 is fixed on the machine table 1. The piston rod of the third air cylinder 303 is fixedly connected to the third bracket 302. A third guide rod 304 for guiding the movement of the third bracket 302 is provided between the second bracket 301 and the third bracket 302. A fourth air cylinder 305 is provided on the second bracket 301. The piston rod of the fourth air cylinder 305 is fixedly connected to a first pressing plate 306 for pressing the belt 11. A fifth air cylinder 307 is provided on the third bracket 302. The piston rod of the fifth air cylinder 307 is fixedly connected to a second pressing plate 308 for pressing the belt 11.

[0050] A fifth bracket 17 is provided on the machine table 1. The belt 11 passes through the fifth bracket 17. A fourth probe 16 is provided on the fifth bracket 17. The fourth probe 16 is used to sense the belt 11. When the fourth probe 16 cannot sense the upper belt 11, it means that there is no material on the belt 11 and an alarm will be triggered.

[0051] After punching the net, the first pressing plate 306 releases the belt 11, the second pressing plate 308 is tightened, the third air cylinder 303 pulls the third bracket 302, then the first pressing plate 306 presses the belt 11, the second pressing plate 308 releases the belt 11, and the third air cylinder 303 pushes the third bracket 302 back; every time the first punching head 411 punches out a filter screen 12, the belt loading device 3 drives the filter screen 12 to move once;. Repeat after each net punching.

[0052] The edge - wrapping and unloading device 5 includes a fourth bracket 501 provided on the machine table 1. An oil cylinder 502 is fixed on the fourth bracket 501. The piston rod of the oil cylinder 502 is fixed with a second punching head 503. An edge - wrapping hole 505 for edge - wrapping the net frame 10 containing the filter screen 12 into the net cover 13 is provided on the bottom surface of the second punching head 503. A through - hole 504 is horizontally provided on the side surface of the second punching head 503. An axial communication hole communicating with the through - hole 504 is provided on the bottom surface of the second punching head 503. A second ejector core 507 for ejecting the net cover 13 is provided in the communication hole. A movable rod 509 fixedly connected to the top of the second ejector core 507 is provided in the through - hole 504. An air nozzle 508 for blowing out and unloading the net cover 13 is provided on the fourth bracket 501.

[0053] Two travel switches 510 of the oil cylinder 502 are provided on the fourth bracket 501; used to adjust the retraction and downward pressure of the oil cylinder 502. When it cannot be tightened, it can be adjusted a little lower.

[0054] The design of the hemming hole 505 is quite special. After the second stamping head 502 presses the screen frame 10 once, the screen frame 10 will be hemmed inward to press the filter screen 12, forming the screen cover 13. After that, the screen cover 13 will be stuck on the hemming hole 12 and move upward together with the second stamping head 503. However, since the second ejector core 507 is movably arranged on the through hole 504, the second ejector core 507 will not move upward immediately with the second stamping head 503 at this moment. Therefore, the second ejector core 507 will push down the screen cover 13 to strip the material, and the air nozzle blows air to blow the screen cover 13 into the blanking chute 15.

[0055] Specifically, six workstations as described above are symmetrically arranged on the turntable 6. The screen frame loading device 2 and the screen pressing device 4 are arranged at a 90-degree angle. The screen frame loading device 2 and the hemming blanking device 5 are arranged at a 150-degree angle. The screen pressing device 4 and the hemming blanking device 5 are arranged at a 120-degree angle. As Figure 4 and Figure 9 shown, a second probe 8 for detecting whether the filter screen 12 is installed on the screen frame 10 at this workstation is also arranged at the workstation between the screen pressing device 4 and the hemming blanking device 5. A third probe 9 for detecting whether there is still the screen cover 13 at this workstation is arranged at the workstation between the hemming blanking device 5 and the screen frame loading device 2.

[0056] This patent also requests to protect a method for screen pressing by the automatic screen pressing machine as described above, specifically as follows:

[0057] The screen frames 10 on the vibrating disk 201 are output one by one through the conveying track 202 to the bayonet 204 on the second support platform 203.

[0058] The turntable 6 rotates 30 degrees each time it rotates. One of the workstations on the turntable 6 moves to the gripper 205. The gripper 205 closes on the sliding track 206 to grab the screen frame 10 on the bayonet 204. The second cylinder 207 drives the gripper 205 to lift and lower, and the first cylinder 208 drives the gripper 205 to move horizontally to place the grabbed screen frame 10 on the placement post 7 at this workstation. Each time the gripper 205 grabs a screen frame 10, the next screen frame 10 automatically moves to the bayonet 204.

[0059] If the first probe 14 detects that the gripper 205 fails to successfully grab the screen frame 10 from the bayonet 204, it will alarm and stop the machine.

[0060] After the turntable 6 rotates two more times for a total of 60 degrees, the position between two adjacent workstations rotates to below the first punching head 411. The upper cylinder 402 drives the first fixing plate 403 to move downward. At the same time, the first fixing plate 403 drives the second fixing plate 405 to move together through the first fixing rod 404. The second fixing plate 405 drives the third fixing plate 407 to move together through the middle cylinder 406. The third fixing plate 407 drives the fourth fixing plate 409 to move together through the second fixing rod 408. The fourth fixing plate 409 drives the first punching head 411 to move downward. The upper cylinder 402 finally drives the first punching head 411 to cooperate with the forming rod 419 to punch out a filter screen 12 on the lower conveyor belt 11. The punched filter screen 12 is arched. Then, the filter screen 12 is stuck in the bottom hole of the first punching head 411 and moves upward and resets with the first punching head 411.

[0061] When the first punching head 411 punches the filter screen 12, the fourth cylinder 305 drives the first pressing plate 306 to clamp the conveyor belt 11 to position the conveyor belt 11. After the first punching head 411 punches out the filter screen 12, the fourth cylinder 305 drives the first pressing plate 306 to release the conveyor belt 11, and the second pressing plate 308 continues to clamp the conveyor belt 11. The third cylinder 303 drives the third support 302 to move to drive the conveyor belt 11 to move.

[0062] The turntable 6 rotates one more time, rotating 30 degrees. The workstation equipped with the mesh frame 10 rotates to below the first punching head 411. The piston rod of the middle cylinder 406 retracts, driving the third fixing plate 407 to move downward. The third fixing plate 407 drives the fourth fixing plate 409 to move together through the second fixing rod 408. The fourth fixing plate 409 drives the first punching head 411 to move downward to approach the lower mesh frame 10. Then, the lower cylinder 410 drives the first ejector core 412 to move downward to press the filter screen 12 on the first punching head 411 onto the lower mesh frame 10.

[0063] After the turntable 6 rotates three more times for a total of 90 degrees, this workstation rotates to the position of the second probe 8. The second probe 8 detects whether the filter screen 12 is installed on the mesh frame 10 at this workstation. If not detected, it will alarm and stop the machine.

[0064] The turntable 6 rotates one more time. After rotating 30 degrees, this workstation rotates to the position of the edge wrapping and blanking device 5. The oil cylinder 502 drives the second punching head 503 to move downward to wrap the edge of the mesh frame 10 inward and press the filter screen 12 to form a mesh cover 13. When the second punching head 503 moves upward and resets, the second ejector core 507 ejects the mesh cover 13 to fall off. At the same time, the air nozzle 508 blows air to blow the mesh cover 13 to the blanking chute 15 for blanking.

[0065] After the turntable rotates twice for a total of 60 degrees, the station rotates to the position of the third probe 9. The third probe 9 detects whether there is still a net cover 13 at this station. If it detects one, it will alarm and stop the machine. When the machine is working normally, there will be no alarm situation;

[0066] After the turntable 6 continues to rotate three times for a total of 90 degrees, the station rotates to the gripper 205. The gripper 205 grabs the net frame 10 on the bayonet 204 to the placement post 7 of this station, and repeats the above steps.

[0067] The embodiments described in the present invention are only descriptions of the preferred embodiments of the present invention, and do not limit the inventive concept and scope. Without departing from the design idea of the present invention, various modifications and improvements made by those skilled in the art to the technical solutions of the present invention should fall within the protection scope of the present invention.

Claims

1. An automatic net pressing machine, characterized in that: it includes a machine table (1), a turntable (6) is provided on the machine table (1), a plurality of work stations are provided on the turntable (6), and a net frame feeding device (2) for conveying the net frame (10) to the work stations, a net belt feeding device (3) for driving the movement of the net belt (11), a net pressing device (4) for punching out the filter screen (12) on the net belt (11) and then pressing it onto the net frame (10), and a hemming and blanking device (5) for hemming the net frame (10) into a net cover (13) and then blanking are respectively provided on the machine table (1) around the turntable (6); The net pressing device (4) includes a first support (401), an upper cylinder (402) for punching out the filter screen (12) from the net belt (11) is provided on the first support (401), the piston rod of the upper cylinder (402) is fixedly connected with a first fixing plate (403), first fixing rods (404) are respectively fixed on both sides of the first fixing plate (403), the lower ends of the first fixing rods (404) are fixedly connected with a second fixing plate (405), the piston rod of a middle cylinder (406) is fixed on the second fixing plate (405), the cylinder body of the middle cylinder (406) is fixedly connected with a third fixing plate (407), the first fixing rods (404) pass through the third fixing plate (407), second fixing rods (408) are respectively fixed on both sides of the third fixing plate (407), the lower ends of the second fixing rods (408) pass through the second fixing plate (405) and are fixedly connected with a fourth fixing plate (409), a lower cylinder (410) is fixed on the fourth fixing plate (409), a first punching head (411) is fixed on the bottom surface of the fourth fixing plate (409), a vertical through hole is provided on the first punching head (411), and a first ejector core (412) for ejecting the filter screen (12) on the first punching head (411) to the net frame (10) is provided in the through hole, and the upper end of the first ejector core (412) is fixedly connected with the piston rod of the lower cylinder (410); A fifth support (17) is provided on the machine table (1), the net belt (11) passes through the fifth support (17), and a fourth probe (16) is provided on the fifth support (17), and the fourth probe (16) is used to sense the net belt (11).

2. The automatic net pressing machine according to claim 1, characterized in that: a first support platform (413) is provided on the first support (401), a guide plate (416) is fixed on the first support platform (413), a guide groove (417) for guiding the net belt (11) is provided on the guide plate (416), the net belt (11) passes through the guide groove (417), a counterbore (418) extending into the first support platform (413) is provided on the guide plate (416), a forming rod (419) is fixed in the counterbore (418), the forming rod (419) is arranged below the net belt (11), and a placement column (7) for placing the net frame (10) is provided at each work station.

3. The automatic net pressing machine according to claim 1 or 2, characterized in that: The frame loading device (2) includes a vibrating disk (201) equipped with a plurality of the frames (10), a conveying track (202) connected to the vibrating disk (201) for outputting the frames (10). A second support platform (203) is provided at the end of the conveying track (202). A bayonet (204) communicating with the conveying track (202) and used for receiving the frame (10) is provided on the second support platform (203). Above the bayonet (204), there is a clamp (205) for grasping the frame (10) on the bayonet (204). Three sliding tracks (206) for the clamp (205) to close are provided around the outside of the bayonet (204). The clamp (205) is driven to move up and down by a second cylinder (207). The second cylinder (207) is fixedly connected to the piston rod of a first cylinder (208). The first cylinder (208) is fixed on a support plate (209). Both the support plate (209) and the second support platform (203) are provided on the machine table (1).

4. The automatic screen pressing machine according to claim 1 or 2, characterized in that: The mesh belt loading device (3) includes a second bracket (301), a third bracket (302) provided on the machine table (1), and a third cylinder (303) for driving the movement of the third bracket (302). The second bracket (301) is fixed on the machine table (1). The piston rod of the third cylinder (303) is fixedly connected to the third bracket (302). A third guide rod (304) for guiding the movement of the third bracket (302) is provided between the second bracket (301) and the third bracket (302). A fourth cylinder (305) is provided on the second bracket (301). The piston rod of the fourth cylinder (305) is fixedly connected to a first pressing plate (306) for pressing the mesh belt (11). A fifth cylinder (307) is provided on the third bracket (302). The piston rod of the fifth cylinder (307) is fixedly connected to a second pressing plate (308) for pressing the mesh belt (11).

5. The automatic screen pressing machine according to claim 1 or 2, characterized in that: The edge wrapping and blanking device (5) includes a fourth bracket (501) provided on the machine table (1). An oil cylinder (502) is fixed on the fourth bracket (501). The piston rod of the oil cylinder (502) is fixed with a second punching head (503). An edge wrapping hole (505) for wrapping the frame (10) containing the filter screen (12) into the mesh cover (13) is provided on the bottom surface of the second punching head (503). A through hole (504) is horizontally provided on the side surface of the second punching head (503). A communication hole communicating with the through hole (504) is axially provided on the bottom surface of the second punching head (503). A second ejector core (507) for ejecting the mesh cover (13) is provided in the communication hole. A movable rod (509) fixedly connected to the top of the second ejector core (507) is provided in the through hole (504). An air nozzle (508) for blowing and blanking the mesh cover (13) is provided on the fourth bracket (501).

6. The automatic screen pressing machine according to claim 2, characterized in that: Six of the said workstations are symmetrically arranged on the turntable (6). The screen frame loading device (2) is arranged at a 90-degree angle to the screen pressing device (4), the screen frame loading device (2) is arranged at a 150-degree angle to the edge wrapping and unloading device (5), and the screen pressing device (4) is arranged at a 120-degree angle to the edge wrapping and unloading device (5). A second probe (8) for detecting whether the screen frame (10) on this workstation is equipped with the filter screen (12) is also arranged at the workstation between the screen pressing device (4) and the edge wrapping and unloading device (5). A third probe (9) for detecting whether there is still the screen cover (13) at this workstation is arranged at the workstation between the edge wrapping and unloading device (5) and the screen frame loading device (2).

7. The automatic screen pressing machine according to claim 3, characterized in that: A first probe (14) for detecting the bayonet (204) is arranged on the second support table (203).

8. The automatic screen pressing machine according to claim 2, characterized in that: A guide post (414) is fixed on the first support table (413). A guide sleeve (422) is arranged on the fourth fixing plate (409). The lower end of the guide post (414) is fixed on the first support table (413). The upper end of the guide post (414) extends into the guide post (414). A sliding sleeve (423) extending into the guide sleeve (422) and a spring (415) for resetting the sliding sleeve (423) are arranged on the guide post (414). A plurality of balls (424) for rolling on the inner wall of the guide sleeve (422) are arranged on the sliding sleeve (423). First guide rods (420) are respectively fixed on both sides of the fourth fixing plate (409). The upper ends of the first guide rods (420) pass through the first bracket (401). A second guide rod (421) is fixed on the fourth fixing plate (409). A guide hole for inserting the second guide rod (421) is arranged on the first support table (413).

9. The method for screen pressing of the automatic screen pressing machine according to any one of claims 1 to 8, characterized in that: The screen frames (10) on the vibrating bowl (201) are output one by one through the conveying track (202) to the bayonet (204) on the second support table (203); The turntable (6) rotates 30 degrees each time it rotates. One of the workstations on the turntable (6) moves to the gripper (205). The gripper (205) closes on the sliding track (206) to grab the screen frame (10) on the bayonet (204). The second cylinder (207) drives the gripper (205) to lift and lower. The first cylinder (208) drives the gripper (205) to move horizontally to place the grabbed screen frame (10) on the placement post (7) of this workstation. Every time the gripper (205) grabs a screen frame (10), the next screen frame (10) automatically moves to the bayonet (204); If the first probe (14) detects that the gripper (205) fails to successfully grab the screen frame (10) from the bayonet (204), it will alarm and stop the machine; After the turntable (6) rotates two more times for a total of 60 degrees, the position between two adjacent workstations rotates to below the first punching head (411). The upper cylinder (402) drives the first fixed plate (403) to move downward. At the same time, the first fixed plate (403) drives the second fixed plate (405) to move together through the first fixed rod (404). The second fixed plate (405) drives the third fixed plate (407) to move together through the middle cylinder (406). The third fixed plate (407) drives the fourth fixed plate (409) to move together through the second fixed rod (408). The fourth fixed plate (409) drives the first punching head (411) to move downward and cooperate with the forming rod (419) to punch out a filter screen (12) on the lower conveyor belt (11). When the first punching head (411) punches out the filter screen (12), the fourth cylinder (305) drives the first pressing plate (306) to clamp the conveyor belt (11) for positioning the conveyor belt (11). After the first punching head (411) punches out the filter screen (12), the fourth cylinder (305) drives the first pressing plate (306) to release the conveyor belt (11), and the third cylinder (303) drives the third support (302) to move to drive the conveyor belt (11) to move. The turntable (6) rotates one more time. The workstation equipped with the mesh frame (10) rotates to below the first punching head (411). The piston rod of the middle cylinder (406) retracts, driving the third fixed plate (407) to move downward. The third fixed plate (407) drives the fourth fixed plate (409) to move together through the second fixed rod (408). The fourth fixed plate (409) drives the first punching head (411) to move downward to be close to the lower mesh frame (10). Then the lower cylinder (410) drives the first ejector core (412) to move downward to press the filter screen (12) on the first punching head (411) onto the lower mesh frame (10). After the turntable (6) rotates three times for a total of 90 degrees, this workstation rotates to the position of the second probe (8). The second probe (8) detects whether the filter screen (12) is installed on the mesh frame (10) at this workstation. If not detected, the machine will alarm and stop. The turntable (6) rotates once. After rotating 30 degrees, this workstation rotates to the position of the edge - wrapping and blanking device (5). The oil cylinder (502) drives the second punching head (503) to move downward to wrap the edge of the mesh frame (10) inward and press the filter screen (12) to form a mesh cover (13). When the second punching head (503) moves upward to reset, the second ejector core (507) ejects the mesh cover (13) to fall off. At the same time, the air nozzle (508) blows air to blow the mesh cover (13) to the designated position for blanking. After the turntable rotates two times for a total of 60 degrees, this workstation rotates to the position of the third probe (9). The third probe (9) detects whether there is still a mesh cover (13) at this workstation. If detected, it will alarm and stop. After the turntable (6) continues to rotate three times for a total of 90 degrees, this workstation rotates to the gripper (205). The gripper (205) grabs the mesh frame (10) on the bayonet (204) to the placement column (7) at this workstation, and repeats the above steps.

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