A particle filtering device for film blowing machine

Abstract

The present invention belongs to the technical field of film blowing machines, and specifically is a particle filtering device for film blowing machines, comprising a film blowing machine body, wherein a feed port is provided at the top of the film blowing machine body; a screening mechanism for filtering plastic particles is arranged inside the film blowing machine body; the screening mechanism comprises two rectangular grooves and a slide groove symmetrically arranged inside the film blowing machine body, an electric push rod is fixedly installed inside the rectangular groove, and a first filter frame and a second filter frame are arranged inside the film blowing machine body; the present invention allows the electric push rod to move the first filter frame up and down, so that the first filter frame can block larger plastic particles to prevent them from continuing to fall, while plastic particles smaller than the through holes of the first filter frame can pass smoothly and continue to fall into the film blowing machine body.

Description

Technical Field

[0001] The invention belongs to the technical field of film blowing machines, and specifically relates to a particle filtering device for film blowing machines. Background Art

[0002] Film blowing machine is a kind of plastic processing equipment, mainly used in the production of plastic film. Film blowing machine is a machine that heats and melts plastic particles and then makes film through processes such as blowing, cooling, and winding. It is divided into many types, such as PE film blowing machine, POF film blowing machine, PVC film blowing machine, etc. When the film blowing machine is working, plastic particles are added to the hopper of the extruder. Under the action of high temperature and pressure, the plastic raw materials are melted and formed into a melt, which then passes through the die of the extruder to form a continuous plastic film.

[0003] Plastic particles will be melted at high temperature after entering the film blowing machine. Since plastic particles are of different sizes, after pouring a large number of plastic particles at one time, it is difficult for larger plastic particles to melt at the same time as smaller plastic particles. Often, smaller plastic particles have been completely melted, while larger plastic particles have not yet been completely melted. At this time, film blowing will result in poor product effect, thus affecting product quality.

[0004] To this end, the present invention provides a particle filtering device for a film blowing machine. Summary of the invention

[0005] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0006] The technical solution adopted by the present invention to solve its technical problems is as follows: a particle filtering device for a film blowing machine according to the present invention comprises a film blowing machine body, a feed port is provided at the top of the film blowing machine body; a screening mechanism for filtering plastic particles is arranged inside the film blowing machine body; the screening mechanism comprises two rectangular grooves and a slide groove symmetrically arranged in the film blowing machine body, an electric push rod is fixedly installed inside the rectangular groove, a first filter frame and a second filter frame are arranged in the film blowing machine body, the bottom of the electric push rod is connected to the surface of the first filter frame, the second filter frame is slidably connected to the slide groove, a plurality of through holes for plastic particles to flow are provided on the surface of the first filter frame and the second filter frame, a plug rod is fixedly installed on the surface of the second filter frame, a first magnetic block is fixedly installed at the bottom of the first filter frame, and a second magnetic block is fixedly installed on the top of the second filter frame; a protective mechanism for preventing plastic particles from entering is arranged in the rectangular groove and the slide groove, and a crushing mechanism for crushing large plastic particles is arranged in the film blowing machine body.

[0007] Furthermore, the insertion rod is conical in shape, and the surface of the insertion rod is rotatably connected to an arc-shaped dredging block via a torsion spring.

[0008] Furthermore, the protective mechanism includes a fixed frame fixedly installed in the rectangular groove, a sliding block is slidably connected inside the fixed frame, a rubber gasket is fixedly installed on the bottom of the sliding block, the bottom of the gasket is fitted with the top of the first filter frame, and a plurality of storage grooves are symmetrically opened inside the fixed frame, a rolling ball is engraved inside the storage groove, a push plate is slidably connected in the storage groove through a first elastic ball, the push plate and the rolling ball are fitted, a plurality of the rolling balls are arranged in an inclined shape, and a plurality of the rolling balls gradually move away from the storage groove; a multi-stage telescopic plate is fixedly installed between the rectangular groove and the bottom of the first filter frame, and the multi-stage telescopic plate is composed of a plurality of hollow plates slidably connected; a protective cloth made of elastic material is fixedly installed in the slide groove, and one end of the protective cloth is fixedly connected to the bottom of the second filter frame.

[0009] Furthermore, an atomization mechanism is provided in the fixed frame, and the atomization mechanism includes a water storage box fixedly installed in the fixed frame and made of rubber material. A water outlet pipe connected to the inside of the water storage box is fixedly installed on one side of the fixed frame close to the first filter frame, and an atomization nozzle is fixedly installed on the water outlet end of the water outlet pipe.

[0010] Furthermore, a shrinkage hole is opened on the surface of the first elastic ball, the push plate and the receiving groove are sealed and slidably connected, and an air outlet pipe connected to the receiving groove is fixedly installed on one side of the fixed frame.

[0011] Furthermore, the crushing mechanism includes a rectangular frame fixedly mounted on one side of the film blowing machine body, a guide groove passing through the rectangular frame is opened inside the film blowing machine body, a crushing roller driven by a servo motor is arranged inside the guide groove, a push rod is fixedly mounted on one side of the second filter frame in the slide groove, a top plate is fixedly mounted on the top of the push rod, the top of the push rod and the top plate are both in the guide groove, the push rod is slidingly connected to the inner wall of the film blowing machine body, a closing plate is rotatably connected at the feed port of the guide groove, a rubber ring is fixedly mounted between the first filter frame and the inner wall of the film blowing machine body, the electric push rod and the first filter frame are connected by a ball head, and an arc-shaped rotating plate is fixedly mounted on the top of the second filter frame; an air blowing component for blowing off residual impurities on the surface of the crushing roller is arranged in the guide groove.

[0012] Furthermore, the top plate and the closing plate are both inclined, and the feed inlet of the guide trough is inclined.

[0013] Furthermore, the blowing assembly includes a second elastic ball fixedly installed in the guide groove, the surface of the second elastic ball is fixedly connected to the closing plate, and a blowing pipe connected to the interior of the second elastic ball is fixedly installed in the guide groove.

[0014] Furthermore, the multi-stage telescopic plate is sealed and slidably connected, a connecting pipe connected to the multi-stage telescopic plate is fixedly installed inside the film blowing machine body, and one end of the connecting pipe away from the multi-stage telescopic plate is aligned with the guide groove.

[0015] The beneficial effects of the present invention are as follows:

[0016] 1. The particle filtering device for a film blowing machine described in the present invention can block larger plastic particles and prevent them from falling further by allowing the electric push rod to move the first filter frame up and down, while plastic particles smaller than the through hole of the first filter frame can pass smoothly and continue to fall into the body of the film blowing machine. The electric push rod is used to drive the first filter frame to swing up and down to prevent larger plastic particles from accumulating on the surface of the first filter frame and blocking the through hole, and the subsequent smaller plastic particles cannot continue to pass through the through hole efficiently. Let the second filter frame slide upward and insert the conical plug rod and the arc plug block into the through hole of the first filter frame. The plug rod and the plug block cooperate to insert into the through hole of the first filter frame to play the role of dredging the through hole, effectively ejecting the plastic particles stuck in the through hole of the first filter frame, and the rotating dredging block can adapt to the through holes of the first filter frame of different sizes. The structure of the above design can realize the rapid separation of plastic particles of different sizes, and avoid larger plastic particles from following smaller plastic particles into the body of the film blowing machine for melting, and the larger plastic particles are completely melted, which affects the subsequent finished product effect.

[0017] 2. The particle filtering device for a film blowing machine described in the present invention allows the sliding block to continuously contact and collide with a plurality of obliquely arranged rolling balls when sliding into the fixed frame, so that the plurality of rolling balls slide and shrink into the storage groove. The vibration generated by the collision will vibrate the first filter frame together, thereby further preventing larger plastic particles from clogging the through holes of the first filter frame and accelerating smaller plastic particles to flow into the film blowing machine body through the through holes of the first filter frame. The cooperation of the fixed frame, the sliding block, the gasket and the multi-stage telescopic plate can prevent the plastic particles from entering the rectangular groove, preventing the plastic particles from sliding normally with the first filter frame due to the electric push rod. At the same time, the protective cloth can prevent the plastic particles from entering the slide groove, thereby protecting the second filter frame.

[0018] The sliding block squeezes the water storage box, so that the water stored in it is sprayed into the film blowing machine body through the atomizing nozzle at the end of the water outlet pipe, and the atomized water is sprayed onto the surface of the plastic particles. Spraying atomized water can reduce static adsorption, making it easier for the plastic particles to quickly pass through the through holes of the first filter frame.

[0019] 3. The particle filtering device for a film blowing machine described in the present invention makes the arc-shaped rotating plate on the second filter frame contact with the first filter frame, and uses the rotating plate to rotate the first filter frame so that the first filter frame is tilted and rotated in the direction of the guide groove. The inclined closing plate is rotated and opened by using the inclined top plate so that the guide groove is opened. When the guide groove is opened, the inclined first filter frame is used to guide larger plastic particles into the guide groove, and the larger plastic particles are crushed by two rotating crushing rollers, and then discharged into the body of the film blowing machine through the guide groove. The above-designed mechanism can achieve the crushing of larger plastic particles after screening, so that they can be reduced and then enter the body of the film blowing machine again for melting, thereby making full use of the plastic particles. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described below in conjunction with the accompanying drawings.

[0021] Figure 1 It is a three-dimensional structural schematic diagram of the film blowing machine body in the present invention;

[0022] Figure 2 It is a schematic diagram of the cross-sectional structure at the feed port of the present invention;

[0023] Figure 3 It is a structural schematic diagram of the second filter frame in the present invention;

[0024] Figure 4 It is a schematic diagram of the structure of the rectangular groove in the present invention;

[0025] Figure 5 It is a structural schematic diagram of the first filter frame in the present invention;

[0026] Figure 6 It is a schematic cross-sectional structure diagram of the fixing frame in the present invention;

[0027] Figure 7 The present invention Figure 3 A schematic diagram of the structure at A;

[0028] Figure 8 The present invention Figure 4 Schematic diagram of the B structure;

[0029] Fig. 9 The present invention Figure 5 Schematic diagram of the C structure;

[0030] Fig.10 The present invention Figure 6 Schematic diagram of the D structure.

[0031] In the figure: 1. Film blowing machine body; 2. Feed inlet;

[0032] 10. Screening mechanism; 11. Rectangular slot; 12. Electric push rod; 13. First filter frame; 14. Second filter frame; 15. Insertion rod; 16. First magnetic block; 17. Second magnetic block; 18. Dredging block; 19. Slideway;

[0033] 20. Protective mechanism; 21. Fixed frame; 22. Sliding block; 23. Gasket; 24. Storage slot; 25. Push plate; 26. Rolling ball; 27. First elastic ball; 28. Multi-stage telescopic plate; 29. ​​Protective cloth;

[0034] 30. Atomizing mechanism; 31. Water storage box; 32. Water outlet pipe; 33. Air outlet pipe;

[0035] 40. Crushing mechanism; 41. Rectangular frame; 42. Diversion groove; 43. Crushing roller; 44. Ejector rod; 45. Ejector plate; 46. Closing plate; 47. Rotating plate; 48. Rubber ring; 49. Ball head;

[0036] 50. Blowing assembly; 51. Second elastic ball; 52. Blowing pipe;

[0037] 60. Connecting pipe. DETAILED DESCRIPTION

[0038] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0039] like Figures 1 to 10 As shown, a particle filtering device for a film blowing machine according to an embodiment of the present invention comprises a film blowing machine body 1, a feed port 2 is provided at the top of the film blowing machine body 1; a screening mechanism 10 for filtering plastic particles is arranged inside the film blowing machine body 1; the screening mechanism 10 comprises two rectangular grooves 11 and a slide 19 symmetrically arranged inside the film blowing machine body 1, an electric push rod 12 is fixedly installed inside the rectangular groove 11, a first filter frame 13 and a second filter frame 14 are arranged inside the film blowing machine body 1, the bottom of the electric push rod 12 is connected to the surface of the first filter frame 13, the second filter frame 14 is slidably connected to the slide 19, a plurality of through holes for the flow of plastic particles are provided on the surface of the first filter frame 13 and the second filter frame 14, a plug rod 15 is fixedly installed on the surface of the second filter frame 14, a first magnetic block 16 is fixedly installed on the bottom of the first filter frame 13, and a second magnetic block 17 is fixedly installed on the top of the second filter frame 14. The plug rod 15 is conical, and an arc-shaped dredging block 18 is rotatably connected to the surface of the plug rod 15 through a torsion spring.

[0040] During operation, plastic particles are introduced into the film blowing machine body 1 through the feed port 2, and a large number of plastic particles will fall on the first filter frame 13. At this time, the electric push rod 12 in the rectangular slot 11 is started, and the electric push rod 12 is allowed to move up and down with the first filter frame 13. The first filter frame 13 can block larger plastic particles to prevent them from continuing to fall, while plastic particles smaller than the through holes of the first filter frame 13 can pass smoothly and continue to fall into the film blowing machine body 1. The electric push rod 12 is used to drive the first filter frame 13 to swing up and down to prevent larger plastic particles from accumulating on the surface of the first filter frame 13 and blocking the through holes, and subsequent smaller plastic particles cannot continue to pass through the through holes efficiently.

[0041] When a batch of plastic particles are poured into the film blowing machine body 1 and the screening is completed, the electric push rod 12 is used to move the first filter frame 13 toward the second filter frame 14, and the first magnetic block 16 at the bottom of the first filter frame 13 and the second magnetic block 17 at the top of the second filter frame 14 are attracted to each other, so that the second filter frame 14 slides upward and inserts the conical plug rod 15 and the arc plug block into the through hole of the first filter frame 13. The plug rod 15 and the plug block cooperate to insert into the through hole of the first filter frame 13 to play the role of dredging the through hole, effectively ejecting the plastic particles stuck in the through hole of the first filter frame 13, and the rotating dredging block 18 can adapt to the through holes of the first filter frame 13 of different sizes. It should be noted that the first filter frame 13 can be replaced according to actual needs to screen plastic particles of different diameters.

[0042] The structure designed above can realize rapid separation of plastic particles of different sizes, thereby preventing larger plastic particles from following smaller plastic particles into the film blowing machine body 1 for melting, and preventing larger plastic particles from being completely melted, thereby affecting the subsequent finished product effect.

[0043] A protective mechanism 20 for preventing plastic particles from entering is arranged in the rectangular groove 11 and the slide groove 19. The protective mechanism 20 includes a fixed frame 21 fixedly installed in the rectangular groove 11. A sliding block 22 is slidably connected inside the fixed frame 21. A rubber gasket 23 is fixedly installed at the bottom of the sliding block 22. The bottom of the gasket 23 fits with the top of the first filter frame 13. A plurality of storage grooves 24 are symmetrically opened inside the fixed frame 21. A rolling ball 26 is engraved inside the storage groove 24. A push plate 25 is slidably connected in the storage groove 24 through a first elastic ball 27. The push plate 25 and the rolling ball 26 fit together. The plurality of rolling balls 26 are arranged in an inclined shape, and the plurality of rolling balls 26 gradually move away from the storage groove 24. A multi-stage telescopic plate 28 is fixedly installed between the rectangular groove 11 and the bottom of the first filter frame 13, and the multi-stage telescopic plate 28 is composed of a plurality of hollow plates slidably connected; a protective cloth 29 made of elastic material is fixedly installed in the slide groove 19, and one end of the protective cloth 29 is fixedly connected to the bottom of the second filter frame 14.

[0044] Specifically, an atomizing mechanism 30 is provided in the fixed frame 21, and the atomizing mechanism 30 includes a water storage box 31 fixedly installed in the fixed frame 21 and made of rubber material, a water outlet pipe 32 connected to the inside of the water storage box 31 is fixedly installed on one side of the fixed frame 21 close to the first filter frame 13, and an atomizing nozzle is fixedly installed on the water outlet end of the water outlet pipe 32. A shrinkage hole is opened on the surface of the first elastic ball 27, the push plate 25 is sealingly and slidably connected to the receiving groove 24, and an air outlet pipe 33 connected to the receiving groove 24 is fixedly installed on one side of the fixed frame 21.

[0045] During operation, when the electric push rod 12 moves the first filter frame 13 up and down, the first filter frame 13 will slide into the fixed frame 21 with the gasket 23 and the sliding block 22, and the sliding block 22 will continuously contact and collide with a plurality of inclined balls 26 when sliding into the fixed frame 21, so that the plurality of balls 26 slide and shrink into the storage groove 24. The vibration generated by the collision will vibrate with the first filter frame 13, thereby further preventing larger plastic particles from blocking the through holes of the first filter frame 13 and accelerating smaller plastic particles to flow into the film blowing machine body 1 through the through holes of the first filter frame 13. The cooperation of the fixed frame 21, the sliding block 22, the gasket 23 and the multi-stage telescopic plate 28 can prevent plastic particles from entering the rectangular groove 11, and prevent plastic particles from sliding normally because the electric push rod 12 carries the first filter frame 13. At the same time, the protective cloth 29 can prevent plastic particles from entering the slide 19, thereby protecting the second filter frame 14.

[0046] When the sliding block 22 slides into the fixed frame 21, it squeezes the rubber water storage box 31, so that the water pre-stored in the water storage box 31 is sprayed into the film blowing machine body 1 through the atomizing nozzle at the end of the water outlet pipe 32, and the atomized water is sprayed onto the surface of the plastic particles. When a large number of plastic particles are poured into the film blowing machine body 1 at one time, the plastic particles generate static charges during friction, contact or separation, which will cause the plastic particles to attract each other and thus adhere together. By spraying atomized water, static adsorption can be reduced, which facilitates the plastic particles to quickly pass through the through holes of the first filter frame 13.

[0047] When the rolling ball 26 slides and contracts, it squeezes the gas in the first elastic ball 27 and the gas in the storage groove 24, so that the gas enters the air outlet pipe 33 and is sprayed toward the water outlet pipe 32. The blown gas is used to spray the sprayed water toward the middle of the film blowing machine body 1, thereby avoiding the situation that only the plastic particles near the water outlet pipe 32 are sprayed into the water, while the plastic particles far away from the water outlet pipe 32 are difficult to be sprayed into the water.

[0048] The film blowing machine body 1 is provided with a crushing mechanism 40 for crushing large plastic particles, the crushing mechanism 40 includes a rectangular frame 41 fixedly installed on one side of the film blowing machine body 1, a guide groove 42 passing through the rectangular frame 41 is opened inside the film blowing machine body 1, a crushing roller 43 driven by a servo motor is arranged inside the guide groove 42, a second filter frame 14 is fixedly installed with a top rod 44 on one side in the chute 19, a top plate 45 is fixedly installed on the top of the top rod 44, and a top plate 45 is fixedly installed on the top of the top rod 44. The top plate 45 and the top plate 45 are both in the guide groove 42, the top rod 44 is slidably connected to the inner wall of the film blowing machine body 1, the feed port 2 of the guide groove 42 is rotatably connected with a closing plate 46, a rubber ring 48 is fixedly installed between the first filter frame 13 and the inner wall of the film blowing machine body 1, the electric push rod 12 and the first filter frame 13 are connected through a ball head 49, and an arc-shaped rotating plate 47 is fixedly installed on the top of the second filter frame 14; a blowing component 50 is provided in the guide groove 42 to blow off the residual impurities on the surface of the crushing roller 43. The top plate 45 and the closing plate 46 are both inclined, and the feed port 2 of the guide groove 42 is inclined.

[0049] Specifically, the blowing assembly 50 includes a second elastic ball 51 fixedly installed in the guide groove 42, the surface of the second elastic ball 51 is fixedly connected to the closing plate 46, and a blowing pipe 52 connected to the inside of the second elastic ball 51 is fixedly installed in the guide groove 42. The multi-stage telescopic plate 28 is sealed and slidably connected, and a connecting pipe 60 connected to the inside of the multi-stage telescopic plate 28 is fixedly installed inside the film blowing machine body 1, and one end of the connecting pipe 60 away from the multi-stage telescopic plate 28 is aligned with the guide groove 42.

[0050] During operation, after a batch of plastic particles have been screened, larger plastic particles will still remain on the surface of the first filter frame 13. At this time, the electric push rod 12 will move the first filter frame 13 downward in the direction of the second filter frame 14, and again use the mutual adsorption effect of the first magnetic block 16 and the second magnetic block 17 to allow the first filter frame 13 and the second filter frame 14 to quickly approach each other. As the first filter frame 13 moves downward, it will contact the arc-shaped rotating plate 47 on the second filter frame 14. Since the electric push rod 12 is connected to the first filter frame 13 through the ball head 49, and the gasket 23 is made of rubber and can be deformed, the rotating plate 47 is used to rotate the first filter frame 13 (the plug rod 15 and the plug block can still be normally inserted into the through hole of the first filter frame 13 when the first filter frame 13 is rotating), so that the first filter frame 13 is tilted and rotated in the direction of the guide groove 42. When the second filter frame 14 moves upward and slides toward the first filter frame 13, the second filter frame 14 will move upward with the push rod 44 and the top plate 45, and use the inclined top plate 45 to rotate and open the inclined closing plate 46. The rotating and opened closing plate 46 will squeeze the second elastic ball 51, so that the gas in the second elastic ball 51 is blown to the two crushing rollers 43 through the blowing pipe 52 (it should be noted that the crushing rollers 43 have been started in advance), and the blown gas is used to clean the surface of the crushing rollers 43 to reduce the residual plastic particles on the surface of the crushing rollers 43. When the first filter frame 13 moves downward, it will shrink with the multi-stage telescopic plate 28. Since the multi-stage telescopic plate 28 is composed of a number of sealed sliding hollow plates, when shrinking, the internal gas will be blown to the first filter frame 13 through the connecting pipe 60, which will help blow the plastic particles on both sides of the surface of the first filter frame 13 to the guide groove 42. When the guide groove 42 is opened, the inclined first filter frame 13 is cooperated to guide the larger plastic particles into the guide groove 42, and the larger plastic particles are crushed by two rotating crushing rollers 43, and then discharged into the film blowing machine body 1 through the guide groove 42 (the outlet of the guide groove 42 is below the second filter frame 14).

[0051] The mechanism designed as above can realize the crushing of the larger plastic particles after screening, so that the larger plastic particles can enter the film blowing machine body 1 again for melting after becoming smaller, thereby making full use of the plastic particles.

[0052] Working principle: Plastic particles are introduced into the film blowing machine body 1 through the feed port 2. A large number of plastic particles will fall on the first filter frame 13. At this time, the electric push rod 12 in the rectangular slot 11 is started, and the electric push rod 12 is allowed to move up and down with the first filter frame 13. The first filter frame 13 can block larger plastic particles to prevent them from continuing to fall, while plastic particles smaller than the through holes of the first filter frame 13 can pass smoothly and continue to fall into the film blowing machine body 1. When a batch of plastic particles are poured into the film blowing machine body 1 and the screening is completed, the electric push rod 12 is used to move the first filter frame 13 toward the second filter frame 14. The first magnetic block 16 at the bottom of the first filter frame 13 and the second magnetic block 17 at the top of the second filter frame 14 are attracted by opposite sex, so that the second filter frame 14 slides upward and inserts the conical plug rod 15 and the arc plug block into the through hole of the first filter frame 13. The plug rod 15 and the plug block cooperate to insert into the through hole of the first filter frame 13 to play the role of clearing the through hole.

[0053] When the electric push rod 12 moves the first filter frame 13 up and down, the first filter frame 13 will slide into the fixed frame 21 with the gasket 23 and the sliding block 22, and the sliding block 22 will continuously contact and collide with a plurality of inclined balls 26 when sliding into the fixed frame 21, so that the plurality of balls 26 slide and shrink into the storage groove 24. The cooperation of the fixed frame 21, the sliding block 22, the gasket 23 and the multi-stage telescopic plate 28 can prevent the plastic particles from entering the rectangular groove 11, and prevent the plastic particles from sliding normally because the electric push rod 12 carries the first filter frame 13. At the same time, the protective cloth 29 can prevent the plastic particles from entering the slide groove 19, and play a role in protecting the second filter frame 14. When the sliding block 22 slides into the fixed frame 21, it squeezes the water storage box 31 made of rubber material, so that the water pre-stored in the water storage box 31 is sprayed into the film blowing machine body 1 through the atomizing nozzle at the end of the water outlet pipe 32, and the atomized water is sprayed onto the surface of the plastic particles. When the rolling ball 26 slides and contracts, it squeezes the gas in the first elastic ball 27 and the gas in the receiving groove 24 , so that the gas enters the gas outlet pipe 33 and sprays toward the water outlet pipe 32 .

[0054] When a batch of plastic particles are screened, larger plastic particles will still remain on the surface of the first filter frame 13. At this time, the electric push rod 12 will move the first filter frame 13 downward toward the second filter frame 14, and again use the mutual adsorption effect of the first magnetic block 16 and the second magnetic block 17 to quickly bring the first filter frame 13 and the second filter frame 14 closer to each other. As the first filter frame 13 moves downward, it will contact the arc-shaped rotating plate 47 on the second filter frame 14. Since the electric push rod 12 is connected to the first filter frame 13 through the ball head 49, and the gasket 23 is made of rubber and can be deformed, the rotating plate 47 is used to rotate the first filter frame 13, so that the first filter frame 13 is tilted and rotated toward the direction of the guide groove 42. When the second filter frame 14 moves upward and slides toward the first filter frame 13, the second filter frame 14 will move upward with the push rod 44 and the top plate 45, and use the inclined top plate 45 to rotate and open the inclined closing plate 46. The rotating and opened closing plate 46 will squeeze the second elastic ball 51, so that the gas in the second elastic ball 51 is blown to the two crushing rollers 43 through the blowing pipe 52, and the blown gas is used to clean the surface of the crushing roller 43, reducing the residual plastic particles on the surface of the crushing roller 43. When the first filter frame 13 moves downward, it will shrink with the multi-stage telescopic plate 28. When shrinking, the multi-stage telescopic plate will blow the internal gas to the first filter frame 13 through the connecting pipe 60, and assist in blowing the plastic particles on both sides of the surface of the first filter frame 13 to the guide groove 42. When the guide groove 42 is opened, it cooperates with the inclined first filter frame 13 to guide larger plastic particles into the guide groove 42, and crushes the larger plastic particles through the two rotating crushing rollers 43, and then discharges them into the film blowing machine body 1 through the guide groove 42.

[0055] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A particle filtering device for a film blowing machine, comprising a film blowing machine body (1), wherein a feed inlet (2) is provided at the top of the film blowing machine body (1); the characteristics are: A screening mechanism (10) for filtering plastic particles is provided inside the film blowing machine body (1); The screening mechanism (10) comprises two rectangular grooves (11) and a slide groove (19) symmetrically arranged in a film blowing machine body (1); an electric push rod (12) is fixedly installed inside the rectangular groove (11); a first filter frame (13) and a second filter frame (14) are arranged in the film blowing machine body (1); the bottom of the electric push rod (12) is connected to the surface of the first filter frame (13); the second filter frame (14) and the slide groove (19) are slidably connected; a plurality of through holes for plastic particles to flow are arranged on the surface of the first filter frame (13) and the second filter frame (14); an insertion rod (15) is fixedly installed on the surface of the second filter frame (14); a first magnetic block (16) is fixedly installed on the bottom of the first filter frame (13); and a second magnetic block (17) is fixedly installed on the top of the second filter frame (14); The rectangular groove (11) and the slide groove (19) are provided with a protection mechanism (20) for preventing plastic particles from entering, and the film blowing machine body (1) is provided with a crushing mechanism (40) for crushing large plastic particles; The insertion rod (15) is conical in shape, and the surface of the insertion rod (15) is rotatably connected to an arc-shaped dredging block (18) via a torsion spring; The protection mechanism (20) comprises a fixed frame (21) fixedly mounted in the rectangular groove (11), a sliding block (22) being slidably connected inside the fixed frame (21), a rubber gasket (23) being fixedly mounted on the bottom of the sliding block (22), the bottom of the gasket (23) being in contact with the top of the first filter frame (13), a plurality of storage grooves (24) being symmetrically opened inside the fixed frame (21), a rolling ball (26) being engraved inside the storage groove (24), a push plate (25) being slidably connected inside the storage groove (24) via a first elastic ball (27), the push plate (25) and the rolling ball (26) being in contact with each other, a plurality of the rolling balls (26) being arranged in an inclined shape, and a plurality of the rolling balls (26) gradually moving away from the storage groove (24); A multi-stage telescopic plate (28) is fixedly installed between the rectangular groove (11) and the bottom of the first filter frame (13), and the multi-stage telescopic plate (28) is composed of a plurality of hollow plates that are slidably connected; A protective cloth (29) made of elastic material is fixedly installed in the slide groove (19), and one end of the protective cloth (29) is fixedly connected to the bottom of the second filter frame (14).

2. A particle filtering device for a film blowing machine according to claim 1, characterized in that: An atomizing mechanism (30) is arranged in the fixing frame (21), and the atomizing mechanism (30) comprises a water storage box (31) fixedly mounted in the fixing frame (21) and made of rubber material; a water outlet pipe (32) connected to the inside of the water storage box (31) is fixedly mounted on a side of the fixing frame (21) close to the first filter frame (13); an atomizing nozzle is fixedly mounted on the water outlet end of the water outlet pipe (32).

3. A particle filtering device for a film blowing machine according to claim 2, characterized in that: A shrinkage hole is provided on the surface of the first elastic ball (27), the push plate (25) and the receiving groove (24) are sealingly and slidably connected, and an air outlet pipe (33) connected to the receiving groove (24) is fixedly mounted on one side of the fixed frame (21).

4. The particle filtering device for a film blowing machine according to claim 1, characterized in that: The crushing mechanism (40) comprises a rectangular frame (41) fixedly mounted on one side of a film blowing machine body (1); a guide groove (42) passing through the rectangular frame (41) is provided inside the film blowing machine body (1); a crushing roller (43) driven by a servo motor is provided inside the guide groove (42); a push rod (44) is fixedly mounted on one side of the second filter frame (14) located in the slide groove (19); a top plate (45) is fixedly mounted on the top of the push rod (44); and a top plate (45) is fixedly mounted on the top of the push rod (44). and a top plate (45) are both located in the guide groove (42); the top rod (44) is slidably connected to the inner wall of the film blowing machine body (1); a closing plate (46) is rotatably connected to the feed port (2) of the guide groove (42); a rubber ring (48) is fixedly installed between the first filter frame (13) and the inner wall of the film blowing machine body (1); the electric push rod (12) and the first filter frame (13) are connected via a ball head (49); and an arc-shaped rotating plate (47) is fixedly installed on the top of the second filter frame (14); An air blowing component (50) for blowing off residual impurities on the surface of the crushing roller (43) is arranged in the guide groove (42).

5. A particle filtering device for a film blowing machine according to claim 4, characterized in that: The top plate (45) and the closing plate (46) are both inclined, and the feed inlet (2) of the guide groove (42) is also inclined.

6. A particle filtering device for a film blowing machine according to claim 4, characterized in that: The blowing assembly (50) comprises a second elastic ball (51) fixedly mounted in the guide groove (42), the surface of the second elastic ball (51) being fixedly connected to the closing plate (46), and a blowing pipe (52) connected to the interior of the second elastic ball (51) being fixedly mounted in the guide groove (42).

7. A particle filtering device for a film blowing machine according to claim 4, characterized in that: The multi-stage telescopic plate (28) is sealed and slidably connected, and a connecting pipe (60) connected to the interior of the multi-stage telescopic plate (28) is fixedly installed inside the film blowing machine body (1), and one end of the connecting pipe (60) away from the multi-stage telescopic plate (28) is aligned with the guide groove (42).

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