Automatic filter screen replacing device for film blowing machine

Abstract

The invention discloses an automatic filter screen replacing device for a film blowing machine, and belongs to the technical field of film blowing machines, the automatic filter screen replacing device comprises a base, an extruder is arranged on one side of the top of the base, the output end of the extruder is communicated with a connecting pipe, the other end of the connecting pipe is communicated with a fixing box, and a preheating assembly is arranged on one side of the exterior of the fixing box; a blocking frame, a filter screen and a press-fit assembly are arranged in the fixing box, and a discharging assembly is arranged on the bottom side of the outer portion of the fixing box. According to the device, through the multi-station design, automatic replacement and automatic discharging of a filter screen can be achieved, the influence of external factors on a conveying pipeline of the device is reduced in the replacement process so that the machining quality of products can be guaranteed, meanwhile, the inner wall of a sealing disc is further cleaned in the discharging process, and the sealing disc is prevented from being damaged. And impurities are prevented from adhering to the interior of the sealing disc and enter one side of the blocking frame in the feeding process of the filter screen, so that the influence on the production quality of products is prevented, and the replacement effect of the device is further improved.

Description

Technical Field

[0001] The invention belongs to the technical field of film blowing machines, and in particular relates to an automatic filter screen replacement device for film blowing machines. Background Art

[0002] The film blowing machine is a device used to produce plastic film. After the plastic particles are heated and melted, the molten plastic is extruded into a film through the film blowing machine. During the operation of the film blowing machine, in order to ensure the quality of the produced film, a filter is required to filter out impurities and miscellaneous fibers in the raw materials.

[0003] For example, a Chinese patent document (CN108555564A) discloses a filter screen replacement device for a film blowing machine, comprising a clamping mechanism, a lifting mechanism, a telescopic mechanism and a reset mechanism, wherein the clamping mechanism is arranged below the lifting mechanism, the telescopic mechanism is connected to the lifting mechanism, and the reset mechanism is connected to the telescopic mechanism; the clamping mechanism is used to clamp the filter screen in the plastic solution when the filter screen needs to be removed, and the lifting mechanism is used to control the lifting and lowering of the clamping mechanism, so that when the filter screen needs to be removed, the clamping mechanism can be controlled by the lifting mechanism to descend to a position where the filter screen can be removed, thereby removing the filter screen. The telescopic mechanism is used to clamp the filter, and the telescopic mechanism is used to control the lifting mechanism to move forward and backward. When the filter needs to be removed, the telescopic mechanism controls the lifting mechanism to move above the filter. The reset mechanism is used to retract the clamping mechanism, lifting mechanism and telescopic mechanism that have completed the task of replacing the filter, and return them to the specified position. However, the operation of the device is relatively cumbersome during use. The movement stroke of the clamping mechanism will affect the replacement and installation effect of the filter, and it is inconvenient to press-fit and fix the replaced filter, which affects the use effect of the replaced filter. Therefore, improvement is needed. Summary of the invention

[0004] The purpose of the present invention is to solve the problems that the operation of the prior art is cumbersome during use, the movement stroke of the clamping mechanism will affect the replacement and installation effect of the filter, and it is inconvenient to press-fit and fix the replaced filter, which affects the use effect of the replaced filter. An automatic filter replacement device for a film blowing machine is proposed to solve the problems that the operation of the prior art is cumbersome, the movement stroke of the clamping mechanism will affect the replacement and installation effect of the filter, and the replaced filter is inconvenient to press-fit and fix, which affects the use effect of the replaced filter.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] An automatic filter screen replacement device for a film blowing machine comprises a base, an extruder is arranged on one side of the top of the base, a connecting pipe is connected to the output end of the extruder, the other end of the connecting pipe is connected to a fixed box, a preheating component is arranged on one side of the outside of the fixed box, a baffle frame, a filter screen and a press-fit component are arranged inside the fixed box, and a discharge component is arranged on the bottom side of the outside of the fixed box;

[0007] The press-fit assembly includes a sealing disk, a first cavity and four second cavities distributed in a circular array are provided inside the sealing disk, a circular through hole for installing a filter screen is provided at the center of the second cavity, a fixing block is provided on the side of the circular through hole opposite to the extruder, the fixing block is fixedly connected to the inside of the sealing disk, four second through holes are distributed in a cross pattern inside the fixing block, a connecting block is slidingly sealed inside the second through hole, and a pressure plate for pressing the filter screen is provided on one side of the connecting block.

[0008] As a further description of the above technical solution:

[0009] An annular tube is arranged between the plurality of fixed blocks, an arc-shaped convex block is fixedly connected to the outer peripheral side of the annular tube, and the arc-shaped convex block and the outer peripheral side of the annular tube are in contact with the guide wheel.

[0010] As a further description of the above technical solution:

[0011] The sealing disk is rotatably sealed inside the fixed box, one end of the sealing disk is fixedly connected to a rotating shaft, the rotating shaft is rotatably connected inside the fixed box, and one end of the rotating shaft extends to the outside of the fixed box and is fixedly connected to a driving motor, and the driving motor is fixedly connected to the inner wall of the fixed box through a mounting plate.

[0012] As a further description of the above technical solution:

[0013] A rack is fixedly connected to the outer peripheral side of the connecting block, and a connecting rod is fixedly connected to the rack side opposite to the first cavity. The other end of the connecting rod extends into the first cavity and is fixedly connected to a guide wheel. A first spring is sleeved on the outer peripheral side of the connecting rod, and the two sides of the first spring are respectively fixedly connected to the guide wheel and the inside of the sealing disk.

[0014] As a further description of the above technical solution:

[0015] One side of the rack is meshed with a gear, a connecting shaft is fixedly connected inside the gear, the connecting shaft is rotatably connected inside the sealing disk, and one side of the outer side of the gear is meshed with a toothed disk, the toothed disk is rotatably connected inside the sealing disk.

[0016] As a further description of the above technical solution:

[0017] The annular cylinder is rotatably connected to the inside of the sealing disk via a bearing, and one end of the annular cylinder extends to the outside of the sealing disk and is fixedly connected to the inner wall of the fixed box. The bottom of the fixed box is fixedly connected to the top of the base via a support seat. The side of the fixed box away from the extruder is connected to the film blowing machine via a pipeline. A feed through hole is opened on one side of the interior of the fixed box, and the feed through hole is arranged on the side opposite to the extruder.

[0018] As a further description of the above technical solution:

[0019] A sliding plate is slidably connected to the inside of the connecting block, and guide rods are fixedly connected to both sides of the sliding plate. The other end of the guide rod extends to the outside of the connecting block and is provided with a travel groove. The travel groove is located inside the fixed block, and the travel groove is connected to the second through hole. First through holes are opened on both sides of the connecting block, and the guide rod is slidably connected to the first through hole and the travel groove. The baffle frame is fixedly connected to the inner wall of the sealing disk, and the baffle frame is arranged on the side opposite to the film blowing machine. The filter screen is arranged between the baffle frame and the pressure plate, and the travel groove is arranged in a Z shape.

[0020] As a further description of the above technical solution:

[0021] The discharging assembly includes a connecting box, one side of which is fixedly connected to the outer wall of the fixed box, and a third through hole is opened at the junction of the connecting box and the fixed box, the outer wall of the connecting box is fixedly connected to a hydraulic cylinder, one end of the hydraulic cylinder output shaft extends to the inside of the connecting box and is fixedly connected to a vertical plate, the vertical plate is slidably connected to the inside of the connecting box, the other side of the vertical plate is respectively fixedly connected to an annular block and an airbag, the other side of the airbag is fixedly connected to the inner wall of the connecting box, the airbag is arranged on the outer peripheral side of the annular block, one side of the airbag is connected to a one-way air inlet pipe, the other side of the airbag is connected to a first cavity through a one-way air outlet pipe, one side of the first cavity is connected to an air outlet hole, and the air outlet hole and the first cavity are both located inside the annular block.

[0022] As a further description of the above technical solution:

[0023] An arc block is arranged on one side of the annular block away from the vertical plate, the arc block is slidably connected to the inside of the baffle frame, and the arc block extends to the outside of the baffle frame and is fixedly connected to a scraper block, a baffle is fixedly connected to the outer peripheral side of the arc block, the baffle is slidably connected to the inside of the baffle frame, and second springs are arranged on both sides of the arc block, and the two sides of the second spring are respectively fixedly connected to the baffle and the inner wall of the baffle frame.

[0024] As a further description of the above technical solution:

[0025] The preheating component includes a recovery cylinder, one side of which is fixedly connected to the outer wall of the fixed box, a fourth through hole is provided at the junction of the recovery cylinder and the fixed box, the recovery cylinder, the connecting box, the circular through hole and the fourth through hole are all on the same axis, a cover plate is fixedly connected to the side of the recovery cylinder away from the fixed box, a heat-conducting cylinder for heat recovery is sleeved on the outer peripheral side of the recovery cylinder, a heat-conducting wire is provided on one side of the top of the heat-conducting cylinder, a heating block is provided on the other end of the heat-conducting wire, the heating block is fixedly connected to the outer wall of the fixed box, and the heating block and the circular through hole are provided on the same axis, an exhaust pipe is connected to one side of the bottom of the recovery cylinder, and a one-way valve is provided on the exhaust pipe.

[0026] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0027] 1. In the present invention, a press-fit assembly is provided to enable the driving motor to drive the rotating shaft and the sealing disk to rotate ninety degrees clockwise and connect the preheated filter screen with the connecting pipe, so as to quickly and automatically replace the filter screen, thereby ensuring the filtering stability and filtering effect of the device on the raw materials during use. At this time, the circular through hole on one side of the sealing disk will be connected with the feed through hole, so that the staff can place the filter screen inside the sealing disk. When the filter screen needs to be replaced again, the sealing disk and the guide wheel are rotated ninety degrees. At this time, the arc-shaped protrusion will drive the guide wheel, the connecting rod and the rack to move, and the power will be transmitted to the other gears and racks through the gears and the toothed disk, so that the connecting block will move in the direction of the filter screen at the same time. At this time, the guide rod will drive the sliding under the action of the stroke groove. The plate and the pressure plate move, and the filter screen is pressed and fixed around the pressure plate to ensure the installation effect of the filter screen inside the sealing disk, and prevent the filter screen from being deformed due to the pressure of the raw materials during use, thereby preventing the filtering effect of the filter screen from being affected, thereby improving the overall use effect of the device. The device can realize automatic replacement and automatic discharging of the filter screen through the multi-station design, and reduces the impact of external factors on the device conveying pipeline during the replacement process to ensure the processing quality of the product. At the same time, the inner wall of the sealing disk is further cleaned during the discharging process to prevent its impurities from adhering to the inside of the sealing disk and entering the side of the baffle frame during the filter screen feeding process, thereby preventing the production quality of the product from being affected, and further improving the replacement effect of the device.

[0028] 2. In the present invention, through the discharging assembly, the hydraulic cylinder pushes the filter into the recovery cylinder through the vertical plate, the annular block and the scraper block, so as to automatically discharge the filter, so as to prevent the heat on the surface of the filter from affecting the staff, and reduce the cooling time of the device during replacement and use, thereby ensuring the portability of the device during use. The scraper block will clean the inner wall of the sealing disk to prevent some impurities from adhering to the inside of the sealing disk, thereby preventing the subsequent replacement and installation of the filter and the filtering effect of impurities from being affected, further improving the production quality of the product, and the vertical plate will transport the internal gas of the airbag to the inside of the sealing disk through the one-way air outlet pipe, the first cavity and the air outlet during the movement, further improving the cleaning effect of the filter during the discharging process.

[0029] 3. In the present invention, through the preheating component, the filter transported to the inside of the recovery cylinder will transfer its heat to the recovery cylinder and the heat-conducting cylinder, and the heat-conducting cylinder will recover the heat on the used filter and transfer the heat to the heating block through the heat-conducting wire. The newly installed filter is preheated by the heating block, which reduces the influence of the filter on the temperature inside the connecting pipe during the replacement process, prevents the subsequent processing quality of the product from being affected, and improves the waste heat utilization effect of the device during use, ensures the energy utilization effect of the device during use, and further improves the replacement effect of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention;

[0031] Figure 2 It is a rear view structural schematic diagram of the fixed box in the present invention;

[0032] Figure 3 It is a schematic diagram of the overall three-dimensional structure of the fixed box in the present invention;

[0033] Figure 4 It is a schematic diagram of the overall three-dimensional structure of the sealing disk in the present invention;

[0034] Figure 5 It is a schematic diagram of the internal three-dimensional structure of the sealing disk in the present invention;

[0035] Figure 6 For the present invention Figure 5 A local enlarged structural schematic diagram;

[0036] Figure 7 It is a schematic diagram of a partial three-dimensional structure of the press-fit assembly in the present invention;

[0037] Figure 8 For the present invention Figure 7 A schematic diagram of the local enlarged structure at B;

[0038] Fig. 9 It is a schematic diagram of the internal three-dimensional structure of the connecting block in the present invention;

[0039] Fig.10 For the present invention Fig. 9 A schematic diagram of the local enlarged structure at C;

[0040] Fig.11 It is a schematic diagram of the three-dimensional structure of the discharging assembly in the present invention.

[0041] Legend:

[0042] 1. Base; 2. Extruder; 3. Fixed box; 4. Preheating assembly; 401. Recovery cylinder; 402. Cover plate; 403. Heat-conducting cylinder; 404. Heat-conducting wire; 405. Heating block; 5. Press-fit assembly; 501. Drive motor; 502. Sealing disk; 503. First cavity; 504. Second cavity; 505. Fixed block; 506. Annular cylinder; 507. Arc-shaped convex block; 508. Guide wheel; 509. Connecting rod; 510. First spring; 511. Rack ; 512, connecting block; 513, gear; 514, connecting shaft; 515, toothed disc; 516, sliding plate; 517, pressure plate; 518, guide rod; 519, travel groove; 520, first through hole; 6, filter screen; 7, discharge assembly; 701, connecting box; 702, hydraulic cylinder; 703, vertical plate; 704, air bag; 705, annular block; 706, air outlet; 707, arc block; 708, scraper block; 8, baffle frame; 9, film blowing machine; 10, connecting pipe. DETAILED DESCRIPTION

[0043] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0044] See also Figure 1-Figure 11 The present invention provides a technical solution: an automatic filter screen replacement device for a film blowing machine, comprising a base 1, an extruder 2 is arranged on one side of the top of the base 1, the output end of the extruder 2 is connected with a connecting pipe 10, the other end of the connecting pipe 10 is connected with a fixed box 3, a preheating component 4 is arranged on one side of the outside of the fixed box 3, a baffle frame 8, a filter screen 6 and a press-fit component 5 are arranged inside the fixed box 3, and a discharge component 7 is arranged on the bottom side of the outside of the fixed box 3.

[0045] The press-fit assembly 5 includes a sealing disk 502, a first cavity 503 and four second cavities 504 distributed in a circular array are provided inside the sealing disk 502, a circular through hole for installing the filter screen 6 is provided at the center of the second cavity 504, a fixing block 505 is provided on the side of the circular through hole opposite to the extruder 2, the fixing block 505 is fixedly connected to the inside of the sealing disk 502, four second through holes are distributed in a cross shape inside the fixing block 505, a connecting block 512 is slidingly sealed inside the second through hole, a pressing plate 517 for pressing the filter screen 6 is provided on one side of the connecting block 512, an annular cylinder 506 is provided between the plurality of fixing blocks 505, an arc-shaped protrusion 507 is fixedly connected to the outer peripheral side of the annular cylinder 506, and the arc-shaped protrusion 507 is fixedly connected to the outer peripheral side of the annular cylinder 506. The outer circumference of the block 507 and the annular cylinder 506 is in contact with the guide wheel 508, the sealing disk 502 is rotatably sealed inside the fixed box 3, one end of the sealing disk 502 is fixedly connected to a rotating shaft, the rotating shaft is rotatably connected to the inside of the fixed box 3, and one end of the rotating shaft extends to the outside of the fixed box 3 and is fixedly connected to a driving motor 501, the driving motor 501 is fixedly connected to the inner wall of the fixed box 3 through a mounting plate, the outer circumference of the connecting block 512 is fixedly connected to a rack 511, and the side of the rack 511 relative to the first cavity 503 is fixedly connected to a connecting rod 509, the other end of the connecting rod 509 extends to the inside of the first cavity 503 and is fixedly connected to the guide wheel 508, and the outer circumference of the connecting rod 509 is sleeved with a first spring 510, and the first spring 510 has two ends. The sides are respectively fixedly connected with the guide wheel 508 and the sealing disk 502, one side of the rack 511 is meshed with a gear 513, the gear 513 is fixedly connected with a connecting shaft 514, the connecting shaft 514 is rotatably connected to the inside of the sealing disk 502, the outer side of the gear 513 is meshed with a toothed disk 515, the toothed disk 515 is rotatably connected to the inside of the sealing disk 502, the annular cylinder 506 is rotatably connected to the inside of the sealing disk 502 through a bearing, and one end of the annular cylinder 506 extends to the outside of the sealing disk 502 and is fixedly connected to the inner wall of the fixed box 3, the bottom of the fixed box 3 is fixedly connected to the top of the base 1 through a support seat, the fixed box 3 is connected to the film blowing machine 9 away from the extruder 2 through a pipeline, and an inlet is opened on one side of the fixed box 3 The feed through hole is arranged on the side relative to the extruder 2, a sliding plate 516 is slidably connected inside the connecting block 512, guide rods 518 are fixedly connected on both sides of the sliding plate 516, the other end of the guide rod 518 extends to the outside of the connecting block 512 and is provided with a travel groove 519, the travel groove 519 is located inside the fixed block 505, and the travel groove 519 is connected to the second through hole, first through holes 520 are opened on both sides of the connecting block 512, the guide rod 518 is slidably connected to the first through hole 520 and the travel groove 519, the baffle frame 8 is fixedly connected to the inner wall of the sealing disk 502, and the baffle frame 8 is arranged on the side relative to the film blowing machine 9, the filter screen 6 is arranged between the baffle frame 8 and the pressure plate 517, and the travel groove 519 is arranged in a Z shape.

[0046] Specific implementation method: first place the device in a suitable place, the extruder 2 will filter the raw materials through the filter screen 6 and then transport them to the inside of the film blowing machine 9 to ensure the manufacturer's production accuracy. When the filter screen 6 is blocked during long-term use, start the drive motor 501, and drive the rotating shaft and the sealing disk 502 to rotate ninety degrees clockwise through the drive motor 501. The preheated filter screen 6 is connected to the connecting pipe 10 through the sealing disk 502 to quickly and automatically replace the filter screen 6, thereby ensuring the filtration stability and filtration effect of the device on the raw materials during use. As the sealing disk 502 is connected, the filter screen 6 is automatically replaced. The disc 502 rotates to move the used filter screen 6 to a position relative to the recovery barrel 401 and the connection box 701, and the guide wheel 508 moves away from the arc-shaped protrusion 507. At this time, the first spring 510 drives the connecting rod 509, the rack 511 and the connecting block 512 to move, and the connecting block 512 drives the guide rod 518 to move inside the travel groove 519 during the movement. The force of the travel groove 519 causes the guide rod 518 to drive the sliding plate 516 and the pressure plate 517 to move upward, so as to automatically release the pressure plate 517 from the filter screen 6. The circular through hole on one side of the sealing disk 502 is connected to the feed through hole, so that the staff can place the filter screen 6 inside the sealing disk 502. When the filter screen 6 needs to be replaced again, the sealing disk 502 is rotated 90 degrees, and the guide wheel 508 moves in the direction of the arc-shaped protrusion 507. At this time, the arc-shaped protrusion 507 drives the guide wheel 508, the connecting rod 509 and the rack 511 to move. The linkage effect between the rack 511 and the gear 513 is used to transmit power to the gear 513, so that the gear 513 drives the toothed disk 508 to move. 15 rotates to transmit power to the other gear 513 and the rack 511, so that the connecting block 512 moves toward the direction of the filter screen 6 at the same time. At this time, under the action of the travel groove 519, the guide rod 518 drives the sliding plate 516 and the pressing plate 517 to move, and the filter screen 6 is pressed and fixed around by the pressing plate 517 to ensure the installation effect of the filter screen 6 inside the sealing disk 502, prevent the filter screen 6 from being deformed due to the pressure of the raw materials during use, and then prevent the filtering effect of the filter screen 6 from being affected, thereby improving the overall use effect of the device.

[0047] The discharging assembly 7 includes a connecting box 701, one side of which is fixedly connected to the outer wall of the fixed box 3, and a third through hole is opened at the junction of the connecting box 701 and the fixed box 3, the outer wall of the connecting box 701 is fixedly connected to a hydraulic cylinder 702, one end of the output shaft of the hydraulic cylinder 702 extends to the inside of the connecting box 701 and is fixedly connected to a vertical plate 703, the vertical plate 703 is slidably connected to the inside of the connecting box 701, and the other side of the vertical plate 703 is respectively fixedly connected to an annular block 705 and an airbag 704, the other side of the airbag 704 is fixedly connected to the inner wall of the connecting box 701, the airbag 704 is arranged on the outer peripheral side of the annular block 705, and one side of the airbag 704 is connected to A one-way air inlet pipe is provided, and the other side of the airbag 704 is connected to a first cavity through a one-way air outlet pipe. An air outlet hole 706 is connected to one side of the first cavity. The air outlet hole 706 and the first cavity are both located inside the annular block 705. An arc block 707 is provided on the side of the annular block 705 away from the vertical plate 703. The arc block 707 is slidably connected to the inside of the baffle frame 8, and the arc block 707 extends to the outside of the baffle frame 8 and is fixedly connected to a scraper block 708. A baffle is fixedly connected to the outer peripheral side of the arc block 707, and the baffle is slidably connected to the inside of the baffle frame 8. Second springs are provided on both sides of the arc block 707, and the two sides of the second spring are respectively fixedly connected to the baffle and the inner wall of the baffle frame 8.

[0048] Specific implementation method: The hydraulic cylinder 702 drives the vertical plate 703 and the annular block 705 to be squeezed, and the annular block 705 will squeeze the scraper block 708, the baffle plate and the baffle frame 8, so that the scraper block 708 pushes the filter 6 into the recovery cylinder 401, so as to automatically discharge the filter 6 to prevent the surface heat of the filter 6 from affecting the staff, reduce the cooling time of the device during replacement and use, thereby ensuring the portability of the device during use, and the scraper block 708 will clean the inner wall of the sealing disk 502 to prevent some impurities from adhering to the inside of the sealing disk 502, thereby preventing the subsequent replacement and installation of the filter 6 and the filtering effect of impurities from being affected, further improving the production quality of the product, and the vertical plate 703 will squeeze the air bag 704 during the movement, and transport the internal gas of the air bag 704 to the inside of the sealing disk 502 through the one-way air outlet pipe, the first cavity and the air outlet 706, further improving the cleaning effect of the filter 6 during the discharge process.

[0049] The preheating component 4 includes a recovery tube 401, one side of which is fixedly connected to the outer wall of the fixed box 3, a fourth through hole is provided at the junction of the recovery tube 401 and the fixed box 3, the recovery tube 401, the connecting box 701, the circular through hole and the fourth through hole are all on the same axis, the recovery tube 401 is fixedly connected to the side away from the fixed box 3 with a cover plate 402, a heat-conducting tube 403 for heat recovery is sleeved on the outer peripheral side of the recovery tube 401, a heat-conducting wire 404 is provided on one side of the top of the heat-conducting tube 403, a heating block 405 is provided on the other end of the heat-conducting wire 404, the heating block 405 is fixedly connected to the outer wall of the fixed box 3, and the heating block 405 and the circular through hole are provided on the same axis, and an exhaust pipe is connected to one side of the bottom of the recovery tube 401, and a one-way valve is provided on the exhaust pipe.

[0050] Specific implementation method: the filter 6 transported to the inside of the recovery cylinder 401 will transfer its heat to the recovery cylinder 401 and the heat-conducting cylinder 403, and the heat-conducting cylinder 403 will recover the heat on the filter 6 after use, and the heat-conducting cylinder 403 will transfer the heat to the heating block 405 through the heat-conducting wire 404, and the filter 6 just pressed and installed will be preheated by the heating block 405, which reduces the influence of the filter 6 on the temperature inside the connecting pipe 10 during the replacement process, prevents the subsequent processing quality of the product from being affected, and improves the waste heat utilization effect of the device during use, ensuring The energy utilization effect of the device during use is improved, and the replacement effect of the device is further improved. The device can realize automatic replacement and automatic discharging of the filter 6 through a multi-station design, and reduces the impact of external factors on the device conveying pipeline during the replacement process to ensure the processing quality of the product. At the same time, the inner wall of the sealing disk 502 is further cleaned during the discharging process to prevent impurities from adhering to the inside of the sealing disk 502 and entering the side of the baffle frame 8 during the feeding process of the filter 6, thereby preventing the production quality of the product from being affected, and further improving the replacement effect of the device.

[0051] Working principle: When in use, first place the device in a suitable place. The extruder 2 will filter the raw materials through the filter screen 6 and then transport them to the inside of the film blowing machine 9 to ensure the manufacturer's production accuracy. When the filter screen 6 is blocked during long-term use, start the drive motor 501, and drive the rotating shaft and the sealing disk 502 to rotate ninety degrees clockwise through the drive motor 501. The preheated filter screen 6 is connected to the connecting pipe 10 through the sealing disk 502 to quickly and automatically replace the filter screen 6. As the sealing disk 502 rotates, the used filter screen is After the filter 6 moves to a position opposite to the recovery drum 401 and the connection box 701, the guide wheel 508 moves away from the arc-shaped protrusion 507. At this time, the first spring 510 drives the connecting rod 509, the rack 511 and the connecting block 512 to move. During the movement, the connecting block 512 drives the guide rod 518 to move inside the travel groove 519. The force of the travel groove 519 causes the guide rod 518 to drive the sliding plate 516 and the pressing plate 517 to move upward, so as to automatically release the pressing effect of the pressing plate 517 on the filter screen 6.

[0052] At this time, the hydraulic cylinder 702 is started, and the vertical plate 703 and the annular block 705 are squeezed by the hydraulic cylinder 702, and the annular block 705 squeezes the scraper block 708, the baffle plate and the baffle frame 8, so that the scraper block 708 pushes the filter screen 6 into the recovery cylinder 401, so as to automatically discharge the filter screen 6, and the scraper block 708 cleans the inner wall of the sealing disk 502, and the vertical plate 703 squeezes the air bag 704 during the movement, and the gas inside the air bag 704 is discharged through the one-way outlet. The heat of the filter 6 after being used is recovered by the heat-conducting cylinder 403, and the heat-conducting cylinder 403 recovers the heat of the filter 6 after use. The heat-conducting cylinder 403 transfers the heat to the heating block 405 through the heat-conducting wire 404, and the filter 6 just press-fitted and installed is preheated by the heating block 405.

[0053] At the same time, the circular through hole on one side of the sealing disk 502 will be connected with the feed through hole so that the staff can place the filter screen 6 inside the sealing disk 502. When the filter screen 6 needs to be replaced again, the sealing disk 502 is rotated ninety degrees, and the guide wheel 508 will move in the direction of the arc-shaped protrusion 507. At this time, the arc-shaped protrusion 507 will drive the guide wheel 508, the connecting rod 509 and the rack 511 to move. By utilizing the linkage effect between the rack 511 and the gear 513, the power is transmitted to the gear 513, so that the gear 513 drives the toothed disk 515 to rotate, so as to transmit the power to the other gear 513 and the rack 511, so that the connecting block 512 moves in the direction of the filter screen 6 at the same time. At this time, under the action of the travel groove 519, the guide rod 518 will drive the sliding plate 516 and the pressing plate 517 to move, and the filter screen 6 is pressed and fixed around by the pressing plate 517 to ensure the installation effect of the filter screen 6 inside the sealing disk 502.

[0054] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An automatic filter screen replacement device for a film blowing machine, comprising a base (1), characterized in that: An extruder (2) is arranged on one side of the top of the base (1); the output end of the extruder (2) is connected to a connecting pipe (10); the other end of the connecting pipe (10) is connected to a fixed box (3); a preheating component (4) is arranged on one side of the outside of the fixed box (3); a baffle (8), a filter screen (6) and a press-fit component (5) are arranged inside the fixed box (3); and a discharge component (7) is arranged on the bottom side of the outside of the fixed box (3); The press-fit assembly (5) comprises a sealing disk (502), wherein a first cavity (503) and four second cavities (504) arranged in a circular array are provided inside the sealing disk (502), a circular through hole for installing a filter screen (6) is provided at the center inside the second cavity (504), a fixing block (505) is provided on the side of the circular through hole opposite to the extruder (2), the fixing block (505) is fixedly connected inside the sealing disk (502), four second through holes are arranged in a cross pattern inside the fixing block (505), a connecting block (512) is slidingly sealed inside the second through hole, and a pressing plate (517) for pressing the filter screen (6) is provided on one side inside the connecting block (512).

2. The automatic filter screen replacement device for a film blowing machine according to claim 1, characterized in that: An annular tube (506) is arranged between the plurality of fixed blocks (505), an arc-shaped protrusion (507) is fixedly connected to the outer peripheral side of the annular tube (506), and the arc-shaped protrusion (507) and the outer peripheral side of the annular tube (506) are in contact with a guide wheel (508).

3. The automatic filter screen replacement device for a film blowing machine according to claim 2, characterized in that: The sealing disk (502) is rotatably sealed inside the fixed box (3); one end of the sealing disk (502) is fixedly connected to a rotating shaft, which is rotatably connected inside the fixed box (3); one end of the rotating shaft extends to the outside of the fixed box (3) and is fixedly connected to a driving motor (501); the driving motor (501) is fixedly connected to the inner wall of the fixed box (3) via a mounting plate.

4. The automatic filter screen replacement device for a film blowing machine according to claim 3, characterized in that: A rack (511) is fixedly connected to the outer peripheral side of the connecting block (512), and a connecting rod (509) is fixedly connected to the side of the rack (511) relative to the first cavity (503). The other end of the connecting rod (509) extends into the interior of the first cavity (503) and is fixedly connected to a guide wheel (508). A first spring (510) is sleeved on the outer peripheral side of the connecting rod (509), and the first spring (510) is fixedly connected to the guide wheel (508) and the interior of the sealing disk (502) on both sides.

5. The automatic filter screen replacement device for a film blowing machine according to claim 4, characterized in that: One side of the rack (511) is meshedly connected with a gear (513), the gear (513) is fixedly connected with a connecting shaft (514) inside, the connecting shaft (514) is rotatably connected to the inside of the sealing disk (502), and one side of the outside of the gear (513) is meshedly connected with a toothed disk (515), the toothed disk (515) is rotatably connected to the inside of the sealing disk (502).

6. The automatic filter screen replacement device for a film blowing machine according to claim 5, characterized in that: The annular cylinder (506) is rotatably connected to the inside of the sealing disk (502) via a bearing, and one end of the annular cylinder (506) extends to the outside of the sealing disk (502) and is fixedly connected to the inner wall of the fixed box (3). The bottom of the fixed box (3) is fixedly connected to the top of the base (1) via a support seat. The side of the fixed box (3) away from the extruder (2) is connected to the film blowing machine (9) via a pipeline. A feed through hole is opened on one side of the interior of the fixed box (3), and the feed through hole is arranged on the side opposite to the extruder (2).

7. The automatic filter screen replacement device for a film blowing machine according to claim 6, characterized in that: A sliding plate (516) is slidably connected inside the connecting block (512), and guide rods (518) are fixedly connected on both sides of the sliding plate (516). The other end of the guide rod (518) extends to the outside of the connecting block (512) and is provided with a travel groove (519). The travel groove (519) is located inside the fixed block (505), and the travel groove (519) is connected to the second through hole. First through holes (520) are opened on both sides inside the connecting block (512), and the guide rod (518) is slidably connected inside the first through hole (520) and the travel groove (519). The baffle frame (8) is fixedly connected to the inner wall of the sealing disk (502), and the baffle frame (8) is arranged on the side opposite to the film blowing machine (9). The filter screen (6) is arranged between the baffle frame (8) and the pressure plate (517), and the travel groove (519) is arranged in a Z shape.

8. The automatic filter screen replacement device for a film blowing machine according to claim 7, characterized in that: The discharging assembly (7) comprises a connection box (701), one side of the connection box (701) is fixedly connected to the outer wall of the fixed box (3), and a third through hole is provided at the junction of the connection box (701) and the fixed box (3), the outer wall of the connection box (701) is fixedly connected to a hydraulic cylinder (702), one end of the output shaft of the hydraulic cylinder (702) extends into the interior of the connection box (701) and is fixedly connected to a vertical plate (703), the vertical plate (703) is slidably connected to the interior of the connection box (701), and the vertical plate (703) is 03) and the other side are respectively fixedly connected with an annular block (705) and an airbag (704), the other side of the airbag (704) is fixedly connected to the inner wall of the connecting box (701), the airbag (704) is arranged on the outer peripheral side of the annular block (705), one side of the airbag (704) is connected to a one-way air inlet pipe, and the other side of the airbag (704) is connected to a first cavity through a one-way air outlet pipe, one side of the first cavity is connected to an air outlet hole (706), and the air outlet hole (706) and the first cavity are both located inside the annular block (705).

9. The automatic filter screen replacement device for a film blowing machine according to claim 8, characterized in that: An arc block (707) is arranged on one side of the annular block (705) away from the vertical plate (703); the arc block (707) is slidably connected to the inside of the baffle frame (8); the arc block (707) extends to the outside of the baffle frame (8) and is fixedly connected to a scraper block (708); a baffle is fixedly connected to the outer peripheral side of the arc block (707); the baffle is slidably connected to the inside of the baffle frame (8); second springs are arranged on both sides of the arc block (707); and the two sides of the second spring are respectively fixedly connected to the baffle and the inner wall of the baffle frame (8).

10. The automatic filter screen replacement device for a film blowing machine according to claim 9, characterized in that: The preheating assembly (4) comprises a recovery cylinder (401), one side of which is fixedly connected to the outer wall of the fixed box (3), a fourth through hole is provided at the junction of the recovery cylinder (401) and the fixed box (3), the recovery cylinder (401), the connection box (701), the circular through hole and the fourth through hole are all located on the same axis, a cover plate (402) is fixedly connected to the side of the recovery cylinder (401) away from the fixed box (3), a heat-conducting cylinder (403) for heat recovery is sleeved on the outer peripheral side of the recovery cylinder (401), a heat-conducting wire (404) is provided on one side of the top of the heat-conducting cylinder (403), a heating block (405) is provided at the other end of the heat-conducting wire (404), the heating block (405) is fixedly connected to the outer wall of the fixed box (3), and the heating block (405) and the circular through hole are located on the same axis, and an exhaust pipe is connected to one side of the bottom of the recovery cylinder (401), and a one-way valve is provided on the exhaust pipe.

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