CPP film raw material particle mixing and proportioning device

Abstract

The invention discloses a CPP film raw material particle mixing and proportioning device, and relates to the field of CPP film production, the CPP film raw material particle mixing and proportioning device comprises a screening bin and a mixing bin, the top of the screening bin is provided with a plurality of uniformly distributed quantitative hoppers, and the screening bin is internally provided with a mounting frame; a first screening mechanism, a second screening mechanism and a third screening mechanism are arranged on the inner side of the mounting frame from top to bottom, the screening hole diameters of the first screening mechanism, the second screening mechanism and the third screening mechanism are sequentially reduced, and the first screening mechanism, the second screening mechanism and the third screening mechanism are the same in structure and each comprise a screening frame, a conical surface filter screen and an annular filter screen. A crushing mechanism is arranged on the inner side, close to the top end, of each screening frame, and a mixing mechanism for mixing raw material particles is arranged in the mixing bin. According to the CPP thin film raw material particle mixing and proportioning device, raw materials can be subjected to multi-stage screening and crushing, it is guaranteed that mixed raw material particles are fine and uniform, abrasion of equipment is reduced, and the overall performance and durability of a CPP thin film are improved.

Description

Technical Field

[0001] The invention relates to the technical field of CPP film production, in particular to a CPP film raw material particle mixing and proportioning device. Background Art

[0002] CPP film is an unstretched polypropylene film produced with polypropylene as the main raw material. When producing CPP film, polypropylene resin, composite materials, antioxidants, UV stabilizers, lubricants, nucleating agents and other additives are needed, and these materials are mixed evenly in a certain proportion.

[0003] In the prior art, the raw materials are usually poured into a mixing machine and then stirred and mixed. However, in the production process of CPP film, it is found that since the raw materials and additives are usually provided by multiple manufacturers and the particle sizes of different materials are different, in the mixing ratio of the raw material particles, In the production process of CPP film, the raw materials and additives used are usually provided by multiple manufacturers, and different materials have different particle sizes. In the raw material particle mixing ratio, raw materials of different particle sizes are mixed with each other. The difference in particle size will lead to different interaction forces between particles during mixing. Small particles are easy to agglomerate, while large particles are difficult to disperse evenly, resulting in uneven particle sizes of the mixed raw materials, affecting the overall mixing uniformity, and prone to problems such as increased equipment wear, uneven film thickness, and increased difficulty in melt extrusion. Summary of the invention

[0004] Technical problems to be solved: The particle sizes of the mixed raw materials are uneven, which affects the overall mixing uniformity, and is prone to increased equipment wear, uneven film thickness, and increased difficulty in melt extrusion.

[0005] In view of the deficiencies in the prior art, the present invention provides a CPP film raw material particle mixing and proportioning device, thereby solving the technical problems mentioned in the background technology.

[0006] Technical solution: To achieve the above objectives, the present invention is implemented through the following technical solutions: A CPP film raw material particle mixing and proportioning device comprises a screening bin and a mixing bin, wherein a plurality of evenly distributed quantitative hoppers are arranged on the top of the screening bin, a mounting frame is arranged inside the screening bin, a hanging mechanism distributed in a circular array is arranged on the outside of the mounting frame, a first screening mechanism, a second screening mechanism and a third screening mechanism with successively decreasing screening apertures are arranged on the inside of the mounting frame from top to bottom, and the first screening mechanism, the second screening mechanism and the third screening mechanism have the same structure, all of which comprise a screening frame, a conical filter screen and an annular filter screen, a crushing mechanism is arranged on the inside of each of the screening frames and near the top end, the crushing mechanism comprises a driving frame and an annular knife holder, a movable knife group distributed in an annular array is arranged on the outside of the annular knife holder, a mixing mechanism for mixing raw material particles is arranged inside the mixing bin, and the mixing mechanism comprises a mixing frame and a material shifting frame.

[0007] In one possible implementation, a fixing ring distributed in parallel up and down is welded and fixed on the inner wall of the screening bin, a feeding ring extending to the inner side of the mixing bin is provided at the bottom center of the screening bin, a plurality of diffusion leaves are provided inside the feeding ring, and the diffusion leaves are symmetrically distributed left and right about the center line of the feeding ring.

[0008] In a possible implementation, the quantitative hoppers are evenly distributed in a ring shape on the top of the screening bin, and each of the quantitative hoppers has different specifications. A feed pipe is installed at the top center of each of the quantitative hoppers, a control valve is installed on the quantitative hopper near the bottom end, a feed hopper is installed on the inner top wall of the screening bin and below the quantitative hopper, and a number of evenly distributed guide vanes are provided on the inner wall of the feed hopper.

[0009] In a possible implementation, the suspension mechanism includes two upper and lower groups of connecting seats distributed in a circular array, each of the connecting seats is respectively arranged below a fixed ring and welded to the circumferential outer wall of the mounting frame, a pull rod is slidably connected inside the connecting seat, the pull rod passes through the top of the connecting seat and is welded to the fixed ring, a supporting block is provided at the bottom of the pull rod and on the inner side of the connecting seat, a first spring is provided above the supporting block, and gaskets are provided on the upper and lower sides of the first spring.

[0010] In a possible implementation, the three groups of screening frames are evenly arranged on the inner side of the mounting frame and are welded and fixed to the inner wall of the mounting frame, the conical filter is arranged on the inner side of the screening frame and close to the center, a crushing ring is arranged on the screening frame and on the outer side of the conical filter, the annular filter is arranged at the bottom of the crushing ring, and the aperture of the annular filter is the same as that of the conical filter.

[0011] In one possible implementation, a discharging rack is welded and fixed to the bottom of the screening rack, a connecting ring is provided at the bottom of the discharging rack, a dispersion rack is provided on the inner side of the discharging rack and near the bottom end, the dispersion rack is rotatably connected to the connecting ring, and a plurality of dispersion leaves distributed in a circular array are provided on the inner side of the dispersion rack.

[0012] In a possible implementation, each of the drive frames is arranged above the conical filter, and a transmission rod that passes through the conical filter is arranged between the drive frames for connection and fixation. A first motor that drives the transmission rod to rotate is installed on the top of the screening bin, and the annular tool holder is arranged on the inner side of the crushing ring channel, and the top end is integrally formed with the drive frame. Blades distributed in an annular array are welded and fixed on the outer side wall of the annular tool holder, and a cleaning brush is arranged at the bottom of the drive frame and above the conical filter.

[0013] In a possible implementation, the movable knife group includes a fixed sleeve, a movable sleeve and a knife sleeve, the three groups of fixed sleeves are welded and fixed on the outer wall of the annular knife holder in an annular array, the knife sleeve is arranged on the outer side of the movable sleeve, and four groups of arc-shaped blades distributed in an alternating manner are arranged on the outer wall of the knife sleeve, one side of the knife sleeve is fixedly connected to the movable sleeve, and the other side of the knife sleeve is movably connected to the fixed sleeve, the end of the fixed sleeve is provided with four groups of first adjusting heads distributed in an annular array, four groups of second adjusting heads matching the first adjusting heads are arranged on the movable sleeve and near the fixed sleeve, a guide groove is arranged on the outer wall of the fixed sleeve and near the edge, a guide block is arranged on the inner wall of the knife sleeve and is slidably connected to the guide groove, a second spring is arranged on the inner side of the fixed sleeve, and the two ends of the second spring are respectively fixedly connected to the fixed sleeve and the movable sleeve, a ball in contact with the inner wall surface of the screening frame is embedded in the end of the movable sleeve, and an adjusting column is arranged on the inner wall of the screening frame and near the left end.

[0014] In a possible implementation, an annular interface is provided at the top of the mixing bin and on the outside of the discharge ring, an integrally formed mixing zone is provided at the bottom of the mixing bin, a discharge plate is provided at the bottom center of the mixing zone, a plurality of evenly distributed first discharge holes are provided on the discharge plate, and support frames are welded and fixed at the bottom of the mixing bin and near the four corners.

[0015] In a possible implementation, the mixing rack is arranged on the inner side of the mixing zone and is rotatably connected to the side wall of the mixing bin via a rotating shaft, the material shifting rack is arranged on the outer side of the mixing rack in a ring array, an integrally formed scraper is provided at one edge of the material shifting rack, an inclined plate is provided on the inner side of the material shifting rack and on the side away from the scraper, an array-distributed inclined blade is provided above the inclined plate, and a second motor for driving the mixing rack to rotate is installed on the outer wall of the mixing bin.

[0016] In a possible implementation, a conveying pipe is provided below the mixing bin, a connecting frame connected to the mixing zone is provided at the top of the conveying pipe and near the left end, a movable baffle is slidably connected to the top of the inner wall of the connecting frame, the upper surface of the movable baffle is in contact with the lower surface of the discharge plate, a plurality of evenly distributed second discharge holes are provided on the discharge plate, an electric push rod for pushing the movable baffle to slide is installed on the left side of the connecting frame, a spiral conveying blade is provided inside the conveying pipe, a plurality of evenly distributed mixing rods are provided on the surface of the spiral conveying blade, and a third motor for driving the spiral conveying blade to rotate is installed on the left side of the conveying pipe.

[0017] Beneficial effects: In this scheme, by providing a first screening mechanism, a second screening mechanism and a third screening mechanism, polypropylene raw materials, composite materials and various additive raw materials can be screened in multiple stages, and the raw materials are crushed by a crushing mechanism during the screening process to make the particle size of the raw materials uniform, thereby ensuring that the mixed raw material particles are fine and uniform, reducing equipment wear and tear, and improving the overall performance and durability of the CPP film.

[0018] In this solution, the mounting frame is suspended and installed by a suspension mechanism. During the screening and crushing process, the connecting seat, the pull rod and the first spring cooperate with each other, so that the mounting frame can drive the screening frame to vibrate continuously, thereby enhancing the screening effect of the conical filter and the annular filter, and effectively preventing the conical filter and the annular filter from being blocked.

[0019] In this solution, three groups of movable knife groups are arranged on the outer side of the annular knife holder. When the annular knife holder drives the movable knife groups to rotate, under the interaction of the first adjusting head, the second adjusting head and the second spring, the guiding direction and the cutting edge direction of the arc-shaped blades on the three groups of movable knife groups can be continuously flipped and changed, thereby preventing the raw materials from being accumulated on the edge of the crushing ring channel due to the centrifugal effect, thereby enhancing the crushing and screening effect of the raw materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings.

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a cross-sectional view of the overall structure of the present invention; Figure 3 It is a schematic diagram of the screening bin structure of the present invention; Figure 4 It is a schematic diagram of the structure of the feed hopper of the present invention; Figure 5 It is a schematic diagram of the internal structure of the mounting frame of the present invention; Figure 6 It is a schematic diagram of the suspension mechanism of the present invention; Figure 7 It is a schematic diagram of the screening frame structure of the present invention; Figure 8 It is a cross-sectional view of the screening frame structure of the present invention; Fig. 9 It is a schematic diagram of the crushing mechanism of the present invention; Fig.10 It is a schematic diagram of the structure of the movable knife group of the present invention; Fig.11 This is an exploded view of the movable knife assembly structure of the present invention; Fig.12 It is a schematic diagram of the structure of the mixing bin of the present invention; Fig.13 It is a schematic diagram of the mixing mechanism of the present invention; Fig.14 It is a schematic diagram of the delivery pipe of the present invention.

[0022] Legend: 1. Screening bin; 11. Fixed ring; 12. Feeding ring; 13. Diffuser; 2. Dosing hopper; 21. Feed pipe; 22. Control valve; 23. Feeding hopper; 24. Guide vane; 3. Mixing bin; 31. Annular interface; 32. Mixing zone; 33. Discharging plate; 34. First discharging hole; 35. Support frame; 4. Mounting frame; 41. Connecting seat; 42. Pull rod; 421. Bearing block; 43. First spring; 431. Gasket; 5. Screening frame; 51. Conical filter screen; 52. Crushing ring; 53. Annular filter screen; 54. Discharging frame; 541. Connecting ring; 55. Dispersing frame; 551. Dispersing vane; 56. Adjusting column; 6. Driving frame; 6 1. Transmission rod; 611. First motor; 62. Annular knife holder; 621. Blade; 63. Cleaning brush; 7. Mixing rack; 71. Material shifting rack; 72. Scraper; 73. Inclined plate; 74. Oblique blade; 75. Second motor; 8. Conveying pipe; 81. Connecting frame; 82. Movable baffle; 821. Second discharging hole; 83. Electric push rod; 84. Spiral conveying blade; 841. Mixing rod; 85. Third motor; 9. Movable knife group; 91. Fixed sleeve; 911. First adjusting head; 912. Guide groove; 92. Movable sleeve; 921. Second adjusting head; 93. Knife sleeve; 931. Curved blade; 932. Guide block; 94. Second spring; 95. Ball. DETAILED DESCRIPTION

[0023] The preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the present invention can be implemented in various forms, so the present invention is not limited to the embodiments described below. In addition, in order to more clearly describe the present invention, components that are not connected with the invention will be omitted from the drawings. The technical solution in the embodiment of the present application is to solve the problems of the above-mentioned background technology, and the overall idea is as follows: Embodiment 1: This embodiment introduces the specific structure of a CPP film raw material particle mixing and proportioning device, referring to Figure 1-Figure 11 , including a screening bin 1 and a mixing bin 3. A plurality of evenly distributed quantitative hoppers 2 are arranged on the top of the screening bin 1. A mounting frame 4 is arranged inside the screening bin 1. A first screening mechanism, a second screening mechanism and a third screening mechanism with successively decreasing screening apertures are arranged on the inner side of the mounting frame 4 from top to bottom. The first screening mechanism, the second screening mechanism and the third screening mechanism have the same structure, and all include a screening frame 5, a conical filter screen 51 and an annular filter screen 53. A crushing mechanism is arranged on the inner side of each screening frame 5 and near the top. The crushing mechanism includes a driving frame 6 and an annular knife frame 62. A mixing mechanism for mixing raw material particles is arranged inside the mixing bin 3. The mixing mechanism includes a mixing frame 7 and a material shifting frame 71.

[0024] In the production process of CPP film, polypropylene raw materials, composite materials and various additives are quantitatively added to the interior of the screening bin 1 according to a certain ratio through each quantitative hopper 2, and the raw material particles fall into the first screening mechanism. The conical filter 51 and the annular filter 53 on the first screening mechanism cooperate with each other to perform the first screening work. The raw material particles with a particle size smaller than the screening aperture of the first screening mechanism fall to the second screening mechanism for the second screening, and the raw material particles with a particle size larger than the screening aperture of the first screening mechanism are crushed by the crushing mechanism until the crushed particles can pass through the annular filter 53 and fall on the second screening mechanism. Through the cooperation of the first screening mechanism, the second screening mechanism and the third screening mechanism, multi-stage screening and crushing of polypropylene raw materials, composite materials and various additive raw materials can be achieved, and the raw material particles smaller than the screening aperture of the third screening mechanism fall into the mixing bin 3, so that the mixing rack 7 and the material shifting rack 71 cooperate with each other to further mix the raw materials, ensure that the mixed raw material particles are fine and uniform, and thereby improve the overall performance and durability of the CPP film.

[0025] like Figure 3 and Figure 4 As shown, a feed ring 12 extending to the inner side of the mixing bin 3 is provided at the bottom center of the screening bin 1, and a plurality of diffusion leaves 13 are provided inside the feed ring 12, and the diffusion leaves 13 are symmetrically distributed on the left and right sides about the center line of the feed ring 12. The diffusion leaves 13 can be used to evenly disperse the raw materials on the inner side of the feed ring 12 to ensure that the raw materials evenly fall into the mixing bin 3, thereby avoiding local accumulation of the raw materials and affecting the mixing effect.

[0026] The quantitative hoppers 2 are evenly distributed in a ring shape on the top of the screening bin 1, and each quantitative hopper 2 has different specifications. A detachable cover plate is connected to the top of each quantitative hopper 2, and a feed pipe 21 is welded and fixed at the center of the cover plate. The feed pipe 21 can be connected to the feed pipes of various raw materials. A control valve 22 is installed on the quantitative hopper 2 near the bottom end. The control valve 22 is used to conveniently control the time and amount of polypropylene raw materials, composite materials and various additives entering the screening bin 1. A feed hopper 23 is installed on the inner top wall of the screening bin 1 and below the quantitative hopper 2, and a plurality of evenly distributed guide vanes 24 are arranged on the inner wall of the feed hopper 23.

[0027] The guide vanes 24 are evenly distributed in a vortex shape. When each quantitative hopper 2 adds raw materials, the raw materials fall into the feed hopper 23. Through the cooperation of multiple guide vanes 24, the raw materials can be guided and diffused, and different types of raw materials can be preliminarily mixed, which is convenient for improving the mixing uniformity of the raw materials.

[0028] like Figure 7-Figure 9 As shown, three groups of screening frames 5 are evenly arranged on the inner side of the mounting frame 4 and are welded and fixed to the inner wall of the mounting frame 4. The conical filter 51 is arranged on the inner side of the screening frame 5 and close to the center. A crushing annular channel 52 is arranged on the screening frame 5 and on the outer side of the conical filter 51. The annular filter 53 is arranged at the bottom of the crushing annular channel 52, and the annular filter 53 has the same aperture as the conical filter 51. The conical filter 51 adopts a slightly curved surface structure, which can guide the raw materials while expanding the screening area, so that larger particles of raw materials can roll to the inside of the crushing annular channel 52 for crushing. After crushing, raw material particles smaller than the aperture of the annular filter 53 will continue to fall, thereby performing subsequent crushing and screening until the particle size of the raw materials meets the screening requirements of the third screening mechanism.

[0029] A discharging rack 54 is welded and fixed to the bottom of the screening rack 5, a connecting ring 541 is provided at the bottom of the discharging rack 54, a dispersion rack 55 is provided on the inner side of the discharging rack 54 and near the bottom end, the dispersion rack 55 is rotatably connected to the connecting ring 541, and a plurality of dispersion leaves 551 distributed in a ring array are provided on the inner side of the dispersion rack 55.

[0030] The raw materials screened by the annular filter 53 and the conical filter 51 can be collected and guided by the discharge rack 54, and the raw materials are evenly dispersed by the dispersion leaves 551, so that the raw materials fall into the next screening mechanism or the inside of the mixing bin 3, which is convenient for screening or mixing the raw materials.

[0031] Each drive frame 6 is arranged above the conical filter 51, and a transmission rod 61 penetrating the conical filter 51 is arranged between each drive frame 6 for connection and fixation. A first motor 611 for driving the transmission rod 61 to rotate is installed on the top of the screening bin 1. The annular knife frame 62 is arranged on the inner side of the crushing ring channel 52, and the top end is integrally formed with the drive frame 6. Blades 621 distributed in a circular array are welded and fixed on the outer side wall of the annular knife frame 62. A cleaning brush 63 is arranged at the bottom of the drive frame 6 and above the conical filter 51.

[0032] When the first motor 611 drives the transmission rod 61 to rotate, the multiple groups of driving frames 6 can drive the annular knife frame 62 to rotate simultaneously, so that the blade 621 crushes the internal raw materials of the crushing ring 52, thereby reducing the particle size of the raw materials, and mixing the raw materials during the crushing process to enhance the mixing effect of the raw materials.

[0033] In addition, during the rotation of the driving frame 6 , the cleaning brush 63 can be driven to rotate, so that the cleaning brush 63 repeatedly brushes the raw materials on the surface of the conical filter 51 to prevent the conical filter 51 from being blocked and at the same time enhance the screening effect of the conical filter 51 .

[0034] An annular interface 31 is provided at the top of the mixing bin 3 and on the outside of the unloading ring 12, an integrally formed mixing zone 32 is provided at the bottom of the mixing bin 3, and support frames 35 are welded and fixed below the mixing bin 3 and near the four corners. The support frames 35 play a supporting and fixing role below the mixing bin 3.

[0035] The mixing rack 7 is arranged on the inner side of the mixing zone 32 and is rotatably connected to the side wall of the mixing bin 3 through a rotating shaft. The bottom of the mixing zone 32 is an arc-shaped structure, which can make the raw materials inside the mixing bin 3 gather to the mixing zone 32, so that the mixing rack 7 can stir and mix the raw materials. The material diverter rack 71 is arranged on the outer side of the mixing rack 7 in a ring array. An integrally formed scraper 72 is arranged at one edge of the material diverter rack 71. An inclined plate 73 is arranged on the inner side of the material diverter rack 71 and away from the scraper 72. An array-distributed inclined leaf 74 is arranged above the inclined plate 73. The inclined directions of the inclined leaves 74 on adjacent material diverter racks 71 are staggered. If the inclined leaf 74 on one side of the material diverter rack 71 is inclined to the left, the inclined leaf 74 on the adjacent side of the material diverter rack 71 is inclined to the right, thereby enhancing the guiding and mixing effect of the raw materials.

[0036] A second motor 75 for driving the mixing frame 7 to rotate is installed on the outer wall of the mixing bin 3. When the second motor 75 drives the mixing frame 7 to rotate, the mixing frame 7 can drive the material shifting frame 71 to rotate. The material shifting frame 71 cooperates with the material shifting frame 71 to repeatedly scrape up the raw materials at the bottom of the mixing zone 32 and stir and mix them. At the same time, the inclined plate 73 and the inclined blade 74 cooperate with each other to guide the scraped raw materials to improve the mixing effect of the raw materials.

[0037] When the CPP film raw materials are mixed and proportioned, first, the polypropylene raw materials, composite materials and various additives are quantitatively added to the interior of the screening bin 1 according to a certain ratio through each quantitative hopper 2, and the feed hopper 23 and the guide vane 24 are coordinated to make the raw materials preliminarily mixed. Then, the raw materials are dropped to the inner side of the screening frame 5, and the conical filter 51 and the annular filter 53 are coordinated to screen the raw materials of different particle sizes. At the same time, the first motor 611 is operated to drive the driving frame 6 to rotate, so that the annular knife frame 62 and the blade 621 are used to crush the raw materials with larger particle sizes. Then, the raw materials with smaller particle sizes are uniformly dispersed through the dispersion frame 55 at the bottom of the discharge frame 54 and flow downward. After the first screening mechanism, the second screening mechanism and the third screening mechanism cooperate with each other, multi-stage screening and crushing are carried out, and the raw materials fall into the interior of the mixing bin 3. Then, the second motor 75 is operated to drive the mixing frame 7 to rotate. Through the cooperation of the material shifting frame 71, the scraper 72 and the oblique blade 74, the raw materials can be evenly mixed to ensure that the particles of the mixed raw materials are fine and uniform.

[0038] Embodiment 2: This embodiment is an improvement based on Embodiment 1: like Figure 2 , Figure 5 and Figure 6 As shown, in order to further improve the screening effect of the conical filter 51 and the annular filter 53 and avoid clogging of the conical filter 51 and the annular filter 53, a hanging mechanism distributed in an annular array is arranged on the outer side of the mounting frame 4, and the hanging mechanism includes two groups of connecting seats 41 distributed in an annular array, and the inner wall of the screening bin 1 is welded and fixed with fixing rings 11 distributed in parallel up and down, and each connecting seat 41 is respectively arranged below the fixing ring 11 and is welded and fixed to the circumferential outer wall of the mounting frame 4, and the inner part of the connecting seat 41 is slidably connected with a pull rod 42, and the pull rod 42 It passes through the top of the connecting seat 41 and is welded and fixed to the fixing ring 11. A support block 421 is provided at the bottom of the pull rod 42 and on the inner side of the connecting seat 41. A first spring 43 is provided above the support block 421. Gaskets 431 are provided on the upper and lower sides of the first spring 43. The openings of the gasket 431 and the top of the connecting seat 41 are both larger than the diameter of the pull rod 42, which facilitates the mounting frame 4 to drive the connecting seat 41 to move on the outside of the pull rod 42, and the gasket 431 can provide buffering protection on both sides of the first spring 43 to prevent the edge of the first spring 43 from detaching from the support block 421.

[0039] The mounting frame 4 can be suspended and fixed by the cooperation of the fixing ring 11, the connecting seat 41 and the pulling rod 42. When the raw material falls into the inside of the screening frame 5, the gravity of the raw material will cause the first spring 43 to undergo a certain degree of elastic deformation. When the first motor 611 drives the driving frame 6 to rotate to crush the raw material, the mounting frame 4 will vibrate, and the elastic action of the first spring 43 will increase the vibration effect, thereby causing the mounting frame 4 to drive the screening frame 5 to vibrate continuously, thereby enhancing the screening effect of the conical filter 51 and the annular filter 53.

[0040] like Figure 7 , Figure 9-11 As shown, since the driving frame 6 drives the annular knife holder 62 to rotate, the blade 621 is used to crush the raw materials. Under the action of centrifugal force, the raw materials will gradually accumulate on the edge of the crushing ring channel 52, resulting in a reduction in the crushing effect of the blade 621, and easily causing the annular filter 53 to be blocked, thereby reducing the screening effect. In order to ensure the crushing and screening effect of the raw materials in the crushing ring channel 52, three groups of movable knife groups 9 distributed in a circular array are also arranged on the outside of the annular knife holder 62.

[0041] The movable knife group 9 includes a fixed sleeve 91, a movable sleeve 92 and a knife sleeve 93. The three groups of fixed sleeves 91 are welded and fixed on the outer wall of the annular knife holder 62 in an annular array. The knife sleeve 93 is arranged on the outside of the movable sleeve 92, and four groups of staggered arc blades 931 are arranged on the outer wall of the knife sleeve 93. One side of the knife sleeve 93 is fixedly connected to the movable sleeve 92, and the other side of the knife sleeve 93 is movably connected to the fixed sleeve 91, so that the movable sleeve 92 can drive the knife sleeve 93 to slide and rotate a fixed angle on the outside of the fixed sleeve 91. The curvature and curvature direction of each arc blade 931 are different, which can improve the guiding effect of the raw materials in the crushing ring 52 and effectively avoid the accumulation of raw materials at the edge.

[0042] The end of the fixed sleeve 91 is provided with four groups of first adjustment heads 911 distributed in a circular array, and four groups of second adjustment heads 921 cooperating with the first adjustment heads 911 are provided on the movable sleeve 92 and near the fixed sleeve 91. The first adjustment heads 911 and the second adjustment heads 921 cooperate with each other through an arc surface. When the second adjustment heads 921 slide along the surface of the first adjustment heads 911, the movable sleeve 92 can be rotated 90 degrees. A guide groove 912 is provided on the outer wall of the fixed sleeve 91 and near the edge, and a guide groove 912 is provided on the inner wall of the knife sleeve 93. The guide block 932 is driven, and the guide groove 912 and the guide block 932 cooperate with each other to limit and guide the knife sleeve 93, so as to facilitate the adjustment and control of the knife sleeve 93. A second spring 94 is arranged on the inner side of the fixed sleeve 91, and the two ends of the second spring 94 are respectively fixedly connected with the fixed sleeve 91 and the movable sleeve 92. A ball 95 in contact with the inner wall surface of the screening frame 5 is embedded in the end of the movable sleeve 92. Under the elastic action of the second spring 94, the ball 95 can always be in contact with the inner wall surface of the screening frame 5. An adjusting column 56 is arranged on the inner wall of the screening frame 5 and near the left end.

[0043] When the driving frame 6 drives the annular knife frame 62 to rotate, the annular knife frame 62 can drive the movable knife group 9 to rotate, and the arc-shaped blade 931 can crush and guide the raw materials inside the crushing ring channel 52 to prevent the raw materials from piling up on the edge of the crushing ring channel 52. During the rotation of the movable knife group 9, the movable sleeve 92 is elastically acted upon by the second spring 94, so that the ball 95 always rolls along the inner wall surface of the screening frame 5. When the ball 95 contacts the adjusting column 56, the second spring 94 can be compressed, and the movable sleeve 92 can be pushed close to the fixed sleeve 91, and the second adjusting head 921 can slide along the surface of the first adjusting head 911. At the same time, the guide block 932 is in the guide groove 91. 2, so that the knife sleeve 93 drives the arc blade 931 to flip 90 degrees. When the ball 95 is away from the rear side of the adjusting column 56, under the elastic action of the second spring 94, the movable sleeve 92 can be gradually away from the fixed sleeve 91, and the second adjusting head 921 can be gradually away from the first adjusting head 911, so as to facilitate the next control of the movable sleeve 92. In this way, during the rotation of the driving frame 6, the three sets of movable knife groups 9 can be continuously steered and regulated, so that the guiding direction and the cutting edge direction of the arc blades 931 on the three sets of movable knife groups 9 can be continuously changed, effectively preventing the raw materials from being accumulated at the edge of the crushing ring 52 under the centrifugal effect, and enhancing the crushing and screening effect of the raw materials.

[0044] like Fig.13 and Fig.14As shown, a discharge plate 33 is provided at the bottom center of the mixing zone 32, and a plurality of evenly distributed first discharge holes 34 are provided on the discharge plate 33. A conveying pipe 8 is provided below the mixing bin 3, and a connecting frame 81 connected to the mixing zone 32 is provided at the top of the conveying pipe 8 and near the left end. A movable baffle 82 is slidably connected to the top of the inner wall of the connecting frame 81, and the upper surface of the movable baffle 82 is in contact with the lower surface of the discharge plate 33. A plurality of evenly distributed second discharge holes 821 are provided on the discharge plate 33, and an electric push rod 83 for pushing the movable baffle 82 to slide is installed on the left side of the connecting frame 81.

[0045] The movable baffle 82 can be driven to slide left and right by the electric push rod 83. When the movable baffle 82 closes the bottom of the first discharge hole 34, the raw materials in the mixing zone 32 can be prevented from flowing downward, so that the raw materials can be continuously mixed to ensure the mixing effect of the raw materials. When the second discharge hole 821 and the first discharge hole 34 overlap, the mixed raw materials can be evenly dropped into the conveying pipe 8, so as to facilitate the conveying and extrusion of the evenly mixed raw materials.

[0046] A spiral conveying blade 84 is provided inside the conveying pipe 8, and a plurality of evenly distributed mixing rods 841 are provided on the surface of the spiral conveying blade 84. A third motor 85 for driving the spiral conveying blade 84 to rotate is installed on the left side of the conveying pipe 8. When the third motor 85 drives the spiral conveying blade 84 to rotate, the spiral conveying blade 84 can continuously convey the raw materials inside the conveying pipe 8 to the right. At the same time, the spiral conveying blade 84 can further stir and mix the raw materials through the mixing rod 841, effectively preventing the raw materials from sticking together.

[0047] Finally, it should be noted that: Obviously, the above embodiments are only examples for clearly explaining the present invention, and are not intended to limit the implementation methods. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from this are still within the scope of protection of the present invention.

Claims

1. A CPP film raw material particle mixing and proportioning device, characterized in that: include: A screening bin (1) and a mixing bin (3), wherein a plurality of evenly distributed quantitative hoppers (2) are arranged on the top of the screening bin (1), a mounting frame (4) is arranged inside the screening bin (1), a hanging mechanism arranged in a circular array is arranged on the outside of the mounting frame (4), a first screening mechanism, a second screening mechanism and a third screening mechanism with screening apertures decreasing from top to bottom are arranged on the inside of the mounting frame (4), and the first screening mechanism, the second screening mechanism and the third screening mechanism have the same structure, and all include a screening frame (5), a conical filter screen (51) and an annular filter screen (53), a crushing mechanism is arranged on the inside and near the top of each screening frame (5), the crushing mechanism includes a driving frame (6) and an annular knife frame (62), and a movable knife group (9) arranged in an annular array is arranged on the outside of the annular knife frame (62), and a mixing mechanism for mixing raw material particles is arranged inside the mixing bin (3), and the mixing mechanism includes a mixing frame (7) and a material shifting frame (71).

2. A CPP film raw material particle mixing and proportioning device as claimed in claim 1, characterized in that: A fixing ring (11) is welded and fixed to the inner wall of the screening bin (1) and is distributed in parallel up and down. A feeding ring (12) is provided at the bottom center of the screening bin (1) and extends to the inside of the mixing bin (3). A plurality of diffusion leaves (13) are provided inside the feeding ring (12), and the diffusion leaves (13) are distributed symmetrically with respect to the center line of the feeding ring (12).

3. A CPP film raw material particle mixing and proportioning device as claimed in claim 1, characterized in that: The quantitative hoppers (2) are evenly distributed in a ring shape on the top of the screening bin (1), and the quantitative hoppers (2) have different specifications. A feed pipe (21) is installed at the top center of each quantitative hopper (2), and a control valve (22) is installed on the quantitative hopper (2) near the bottom. A feed hopper (23) is installed on the inner top wall of the screening bin (1) and below the quantitative hopper (2), and a plurality of evenly distributed guide vanes (24) are arranged on the inner wall of the feed hopper (23).

4. A CPP film raw material particle mixing and proportioning device as claimed in claim 1, characterized in that: The suspension mechanism comprises two groups of upper and lower connecting seats (41) distributed in a circular array, each of the connecting seats (41) is respectively arranged below the fixing ring (11) and is welded and fixed to the circumferential outer wall of the mounting frame (4), the connecting seat (41) is slidably connected to the inside of the connecting seat (41) with a pull rod (42), the pull rod (42) passes through the top of the connecting seat (41) and is welded and fixed to the fixing ring (11), a support block (421) is arranged at the bottom of the pull rod (42) and located on the inner side of the connecting seat (41), a first spring (43) is arranged above the support block (421), and gaskets (431) are arranged on both the upper and lower sides of the first spring (43).

5. A CPP film raw material particle mixing and proportioning device as claimed in claim 1, characterized in that: The three groups of screening frames (5) are evenly arranged on the inner side of the mounting frame (4) and are fixed by welding to the inner wall of the mounting frame (4); the conical filter screen (51) is arranged on the inner side of the screening frame (5) and near the center; a crushing ring channel (52) is arranged on the screening frame (5) and outside the conical filter screen (51); the annular filter screen (53) is arranged at the bottom of the crushing ring channel (52); and the annular filter screen (53) and the conical filter screen (51) have the same aperture; a discharging frame (54) is fixed by welding to the bottom of the screening frame (5); a connecting ring (541) is arranged at the bottom of the discharging frame (54); a dispersion frame (55) is arranged on the inner side of the discharging frame (54) and near the bottom end; the dispersion frame (55) is rotatably connected to the connecting ring (541); and a plurality of dispersion leaves (551) distributed in an annular array are arranged on the inner side of the dispersion frame (55).

6. A CPP film raw material particle mixing and proportioning device as claimed in claim 5, characterized in that: Each of the drive racks (6) is arranged above the conical filter (51), and a transmission rod (61) penetrating the conical filter (51) is arranged between the drive racks (6) for connection and fixation. A first motor (611) for driving the transmission rod (61) to rotate is installed on the top of the screening bin (1). The annular blade rack (62) is arranged on the inner side of the crushing ring channel (52), and the top end is integrally formed with the drive rack (6). Blades (621) distributed in an annular array are welded and fixed on the outer side wall of the annular blade rack (62). A cleaning brush (63) is arranged at the bottom of the drive rack (6) and located above the conical filter (51).

7. A CPP film raw material particle mixing and proportioning device as claimed in claim 1, characterized in that: The movable knife assembly (9) comprises a fixed sleeve (91), a movable sleeve (92) and a knife sleeve (93); three groups of the fixed sleeves (91) are welded and fixed on the outer wall of the annular knife holder (62) in an annular array; the knife sleeve (93) is sleeved on the outer side of the movable sleeve (92); and four groups of staggered arc blades (931) are arranged on the outer wall of the knife sleeve (93); one side of the knife sleeve (93) is fixedly connected to the movable sleeve (92); the other side of the knife sleeve (93) is movably connected to the fixed sleeve (91); four groups of first adjustment heads (911) distributed in an annular array are arranged at the end of the fixed sleeve (91); and the movable sleeve (92) is provided with a plurality of first adjustment heads (911) arranged on the movable sleeve (92) and close to the fixed sleeve (91). Four groups of second adjusting heads (921) matched with the first adjusting heads (911) are arranged at the fixing sleeve (91); a guide groove (912) is arranged on the outer wall of the fixing sleeve (91) and near the edge; a guide block (932) is arranged on the inner wall of the knife sleeve (93) and is slidably connected to the guide groove (912); a second spring (94) is arranged on the inner side of the fixing sleeve (91); two ends of the second spring (94) are respectively fixedly connected to the fixing sleeve (91) and the movable sleeve (92); a ball (95) in contact with the inner wall surface of the screening frame (5) is embedded at the end of the movable sleeve (92); and an adjusting column (56) is arranged on the inner wall of the screening frame (5) and near the left end.

8. A CPP film raw material particle mixing and proportioning device as claimed in claim 1, characterized in that: An annular interface (31) is provided at the top of the mixing bin (3) and outside the discharge ring (12); an integrally formed mixing zone (32) is provided at the bottom of the mixing bin (3); a discharge plate (33) is provided at the bottom center of the mixing zone (32); a plurality of evenly distributed first discharge holes (34) are provided on the discharge plate (33); and support frames (35) are welded and fixed below and near the four corners of the mixing bin (3).

9. A CPP film raw material particle mixing and proportioning device as claimed in claim 1, characterized in that: The mixing rack (7) is arranged on the inner side of the mixing area (32) and is rotatably connected to the side wall of the mixing bin (3) via a rotating shaft. The material shifting rack (71) is arranged on the outer side of the mixing rack (7) in a ring array. An integrally formed scraper (72) is arranged at one side edge of the material shifting rack (71). An inclined plate (73) is arranged on the inner side of the material shifting rack (71) and away from the scraper (72). An array of inclined blades (74) are arranged above the inclined plate (73). A second motor (75) for driving the mixing rack (7) to rotate is installed on the outer wall of the mixing bin (3).

10. A CPP film raw material particle mixing and proportioning device as claimed in claim 8, characterized in that: A conveying pipe (8) is provided below the mixing bin (3); a connecting frame (81) connected to the mixing zone (32) is provided at the top of the conveying pipe (8) and near the left end; a movable baffle (82) is slidably connected to the top of the inner wall of the connecting frame (81); the upper surface of the movable baffle (82) is in contact with the lower surface of the discharge plate (33); the discharge plate (33) is provided with a plurality of evenly distributed second discharge holes (821); an electric push rod (83) for pushing the movable baffle (82) to slide is installed on the left side of the connecting frame (81); a spiral conveying blade (84) is provided inside the conveying pipe (8); a plurality of evenly distributed mixing rods (841) are provided on the surface of the spiral conveying blade (84); and a third motor (85) for driving the spiral conveying blade (84) to rotate is installed on the left side of the conveying pipe (8).

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