Pretreatment device of rheological master batch for multi-layer co-extrusion PE cast film

Abstract

The invention relates to the technical field of plastic processing, in particular to a pretreatment device for rheological master batches for a multi-layer co-extrusion PE cast film, and provides the pretreatment device for the rheological master batches for the multi-layer co-extrusion PE cast film, which comprises a mounting frame, a dispersing box is arranged at the top of the mounting frame, and a plurality of flow guide plates are arranged on the dispersing box; the middle and two sides of the bottom of the dispersing box are respectively provided with a material collecting hopper for discharging materials; and the crushing assembly for uniformly crushing the plastic particles is arranged at the top of the dispersing box. Plastic particles smashed by the smashing assembly are screened through the screen plate, meanwhile, the reciprocating assembly drives the pushing mechanism to push the particles in an oriented mode, the particles with the particle size exceeding the standard are pushed to discharging openings in the two sides of the screen plate and enter material collecting hoppers on the two sides of the dispersing box, and therefore the overlarge particles are accurately removed and prevented from entering the subsequent hot melting procedure; the hot melting speed reduction caused by long heating time is avoided, the energy consumption of the hot melting device is finally reduced, the hot melting process is optimized, and the overall effect and the product quality are improved.

Description

Technical Field

[0001] This invention relates to the field of plastic processing technology, and in particular to a pretreatment device for rheology masterbatch for multilayer co-extruded PE cast film. Background Technology

[0002] In the production of multilayer co-extruded PE cast film, the pretreatment of rheology masterbatch directly affects key indicators such as film uniformity, mechanical properties, and barrier properties.

[0003] In the existing production process of PE cast film, the most widely used method is crushing and melting, which breaks large or granular rheology masterbatches into uniform and fine particles. The crushing device for rheology masterbatches must meet the core requirements of efficient crushing, uniform particle size, and prevention of material degradation. By crushing the rheology masterbatches, the final particle size distribution is precisely controlled. Then, the crushed rheology masterbatches are hot-melted to optimize the physical morphology of the masterbatch, so as to meet the strict requirements of multilayer co-extrusion process for raw material particle size, dispersibility and processing stability.

[0004] However, existing crushing equipment can only control the approximate particle size of the crushed plastic. This means that some plastic particles with larger diameters may enter the hot-melt equipment, resulting in a slower melting speed and a higher melting temperature. This affects the melt viscosity, elasticity, and other rheological parameters of the masterbatch after hot melting.

[0005] Therefore, it is necessary to design a pretreatment device for rheology masterbatch for multilayer co-extruded PE cast film. Summary of the Invention

[0006] In order to overcome the disadvantage of traditional crushing equipment that may allow plastic particles with larger diameters to enter the hot melt equipment, the technical problem of the present invention is to provide a pretreatment device for rheology masterbatch for multilayer co-extruded PE cast film.

[0007] A pretreatment device for rheology masterbatch for multilayer co-extruded PE cast film includes: a mounting frame and a dispersion box. The dispersion box is placed on top of the mounting frame. Aggregating hoppers are provided at the middle and both sides of the bottom of the dispersion box. A crushing component is provided on the top of the dispersion box. A frame-shaped mounting sleeve is provided inside the dispersion box. A sieve plate is slidably provided in the middle of the mounting sleeve. Discharge ports are symmetrically opened on both sides of the top of the sieve plate. A partition plate is provided on both sides of the dispersion box away from the discharge port. A reciprocating component that moves along the length of the partition plate is provided between the two partition plates and the dispersion box. A pushing mechanism that pushes and disperses the particles on the sieve plate and assists in screening is provided between the two transmission blocks.

[0008] Further explanation: The pushing mechanism specifically includes: a connecting plate; a connecting plate is slidably provided on the side of each of the two partition plates that are close to each other; the transmission blocks are rotatably connected to the adjacent connecting plates; a rotating plate is sleeved between the adjacent ends of the two connecting plates; the adjacent ends of the two rotating plates are both elliptical; a connecting block is rotatably connected between the two rotating plates; a groove is opened inside the connecting block directly opposite the rotating plate; a pressing block is slidably provided in the groove; the end of the pressing block near the rotating plate is elliptical and contacts and engages with it; elastic elements are provided in both the pressing block and the groove; a top block is provided inside the dispersion box directly opposite the connecting block; the top block is in contact with the connecting block.

[0009] Further explanation includes: a dispersing cylinder, wherein the discharge port of the crushing component is provided with a dispersing cylinder, the bottom of the inner side of the dispersing cylinder is a cone shape with an upward convex shape, and a plurality of material discharge holes are evenly spaced in a ring at the bottom of the dispersing cylinder.

[0010] Further explanation includes: a transmission column and a cylinder; a square hole is opened at the top of the mounting sleeve facing the reciprocating assembly; a corrugated groove is opened at the position of the screen plate facing the square hole; a transmission column is provided at the bottom of the transmission block; a cylinder is provided at the bottom of the transmission column; and the cylinder slides in the corrugated groove.

[0011] Further explanation includes: a first pipe, wherein the bottom of the dispersion cylinder is provided below two symmetrical discharge holes, and the bottom of the two first pipes is connected to a discharge box, the bottom of the discharge box having a long conical opening; a second pipe is provided below the discharge holes on both sides of the first pipe at the bottom of the dispersion cylinder, and a conveying pipe is provided between the second pipe and the discharge box.

[0012] To further explain, the connection points of the conveying pipes on both sides of the material drop box are set in a manner that is one closer to the center of the material drop box and the other farther away.

[0013] To further explain, the distance between the farthest points of the reciprocating components on the partition plate is greater than the distance between the two discharge ports on the screen plate.

[0014] The beneficial effects of the present invention are as follows: 1. In the present invention, the plastic particles crushed by the crushing component are screened by the screen plate. At the same time, the reciprocating component drives the pushing mechanism to push the particles in a directional manner, pushing the particles with excessive particle size to the discharge ports on both sides of the screen plate and into the material hoppers on both sides of the dispersion box. This accurately removes the oversized particles and prevents them from entering the subsequent hot melting process, avoiding the slowdown of the hot melting speed due to long heating time. Ultimately, it reduces the energy consumption of the hot melting device, optimizes the hot melting process, and improves the overall effect and product quality.

[0015] 2. The connecting block and the rotating plates on both sides form a conical structure facing the center of the dispersion box under the action of the elastic element. The reciprocating component drives the rotating plates and connecting block to move through the transmission block, pushing large-diameter particles to the discharge port. At the same time, the conical structure promotes particle diffusion, improves the screening rate of fine particles and reduces energy consumption. When the connecting block contacts the top block, the rotating plate rotates relative to the connecting block and adjusts the angle. Finally, under the action of the elastic element, it reforms the conical structure facing the center of the dispersion box, ensuring that the pushing mechanism always maintains the conical shape to push the particles during reciprocating movement. This enables the device to operate automatically and has a simple structure that does not affect the particles falling from the dispersion cylinder onto the screen plate. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0017] Figure 2 This is a partial three-dimensional structural schematic diagram of the present invention.

[0018] Figure 3 This is a three-dimensional structural diagram of the pushing mechanism of the present invention.

[0019] Figure 4 This is a partial three-dimensional cross-sectional view of the pushing mechanism of the present invention.

[0020] Figure 5 This is a top view of the three-dimensional structure of the connecting block, rotating plate, and extrusion block of the present invention.

[0021] Figure 6 This is a three-dimensional structural diagram of the connecting block of the present invention.

[0022] Figure 7 This is a partial three-dimensional structural diagram of the pulverizing component and dispersing cylinder of the present invention.

[0023] Figure 8 This is a three-dimensional cross-sectional view of the dispersion cylinder of the present invention.

[0024] Figure 9 This is a partial three-dimensional structural diagram of the material feeding box of the present invention.

[0025] Figure 10 This is a three-dimensional structural diagram of the material feeding box, the first pipe, and the conveying pipe of the present invention.

[0026] Figure 11 This is a three-dimensional structural diagram of the mounting sleeve, sieve plate, and transmission block of the present invention.

[0027] Figure 12 This is a three-dimensional structural diagram of the sieve plate, transmission block, and cylinder of the present invention.

[0028] In the attached diagrams: 1: Mounting frame, 2: Dispersion box, 3: Divider plate, 4: Reciprocating assembly, 5: Transmission block, 6: Pushing mechanism, 601: Connecting plate, 602: Rotating plate, 603: Connecting block, 604: Extrusion block, 605: Elastic element, 606: Top block, 7: Crushing assembly, 8: Dispersion cylinder, 801: Discharge hole, 9: Discharge box, 901: First pipe, 902: Second pipe, 903: Conveying pipe, 1001: Mounting sleeve, 1002: Screen plate, 1003: Corrugated groove, 1004: Transmission column, 1005: Cylinder. Detailed Implementation

[0029] The invention will now be described more fully below with reference to the accompanying drawings, in which presently preferred embodiments of the invention are illustrated. However, the invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided for thoroughness and completeness and to fully convey the scope of the invention to those skilled in the art.

[0030] Example 1 like Figures 1 to 6 As shown, the present invention provides a pretreatment device for rheology masterbatch for multilayer co-extruded PE cast film, specifically including a mounting frame 1, a dispersion box 2, a separator plate 3, a reciprocating assembly 4, a transmission block 5; a pushing mechanism 6, a crushing assembly 7, a mounting sleeve 1001, and a sieve plate 1002; The installation frame 1 has a dispersing box 2 on top. The bottom of the dispersing box 2 is equipped with material hoppers for discharging material in the middle and on both sides. The top of the dispersing box 2 is equipped with a crushing component 7 for uniformly crushing plastic particles. The inner side of the dispersing box 2 is equipped with an installation sleeve 1001 with a through hole on the horizontal surface. The middle of the installation sleeve 1001 is equipped with a sieve plate 1002 that slides horizontally. The top of the sieve plate 1002 has symmetrical discharge ports on both sides for crushing and screening plastic masterbatch. Among them, the horizontal and vertical discharge ports in the dispersion box 2 are provided with partition plates 3 on both sides, and the space enclosed by the partition plates 3 and the two sides of the dispersion box 2 is provided with reciprocating components 4, which move along the length of the partition plates 3. The transmission block 5 is installed on the moving part of the reciprocating assembly 4, and a pushing mechanism 6 is provided between the two transmission blocks 5 on both sides inside the dispersion box 2 to push the particles on the sieve plate 1002 and disperse and assist in screening.

[0031] For example, in use, plastic masterbatch is fed from the top of the crushing component 7 to crush it. The crushed plastic particles are discharged from the bottom of the crushing component 7 and fall to the middle position of the screen plate 1002. At this time, the plastic particles that meet the required size can enter the hopper in the middle of the dispersion box 2 through the screen holes. At the same time, the reciprocating component 4 is started and drives the pushing mechanism 6 to move back and forth in the dispersion box 2 through the transmission block 5, and directionally pushes the plastic particles to move. After screening, the plastic particles with a size larger than the predetermined size are pushed to the discharge ports on both sides of the screen plate 1002 and then enter the hoppers on both sides of the dispersion box 2. Particles with a size exceeding the predetermined standard are accurately removed, effectively preventing plastic particles with an excessively large size from entering the subsequent hot melting process. This avoids the need for a longer heating time during the hot melting process due to large-sized particles, which would slow down the hot melting speed. In this way, not only can the energy consumption of the hot melting device be significantly reduced during operation, but the hot melting process can also be optimized by ensuring that all plastic particles entering the hot melting stage have a uniform size, thereby greatly improving the overall effect of hot melting and product quality.

[0032] like Figures 3 to 6 As shown, the pushing mechanism 6 specifically includes a connecting plate 601; a rotating plate 602; a connecting block 603; a pressing block 604; an elastic element 605; and a top block 606. Among them, the two partition plates 3 are slidably provided with connecting plates 601 along the length direction on the side that is close to each other. The transmission blocks 5 are rotatably connected to the close connecting plates 601. The two connecting plates 601 are fitted with rotating plates 602 at the ends that are close to each other. The two rotating plates 602 are rotatably connected with connecting blocks 603, which are used to push plastic particles to the discharge port of screen plate 1002 under the drive of reciprocating component 4. The two rotating plates 602 are elliptical at their closest points. The vertical side of the connecting block 603 is prismatic. Slots are formed on both sides of the connecting block 603, directly opposite the rotating positions of the rotating plates 602. Squeezing blocks 604 are slidably installed within each slot. The end of the squeezing block 604 away from the slot is elliptical and engages with the rotating plate 602. Elastic elements 605 are provided in both the squeezing block 604 and the slots. Top blocks 606 are symmetrically positioned in the middle of the two vertical sides of the inner side of the dispersion box 2 that contact the partition plate 3. The top blocks 606 are connected to the connecting block 602. The 03 contact setting is used to realize the rapid automatic reversal of the conical structure formed by the pushing mechanism. The distance between the farthest ends of the reciprocating components 4 on the partition plate 3 is greater than the distance between the two discharge ports on the screen plate 1002. By setting the single movement distance of the reciprocating components 4 to be greater than the distance between the two discharge ports on the screen plate 1002, it can be ensured that the pushing mechanism 6 pushes the plastic particles into the discharge port and that the top block 606 can fully contact the connecting block 603, ensuring that the pushing mechanism 6 changes the orientation of the conical structure in time during reciprocating movement.

[0033] Initially, the elastic elements 605 on both sides of the connecting block 603 drive the extrusion blocks 604 to extrude the rotating plate 602, causing the connecting block 603 and the rotating plates 602 on both sides to form a conical structure facing the center of the dispersion box 2. When the reciprocating assembly 4 drives the transmission block 5 to move, the two transmission blocks 5 simultaneously drive the rotating plate 602 and the connecting block 603 to move within the dispersion box 2 via the connecting plate 601, thereby pushing the plastic particles with a particle size larger than the predetermined particle size after screening to the discharge ports on both sides of the screen plate 1002. The particles then enter the hoppers on both sides of the dispersion box 2. When the inclined or conical structure pushes the particles, the particles experience a component force along the conical surface, causing them to diffuse outwards. This increases the frequency and angle of contact with the screen, thereby improving the screening rate of fine particles. Furthermore, the inclined conical design converts some of the particle's gravity into propulsion force during movement, especially when processing large quantities of particles, reducing the need for externally applied horizontal thrust and thus lowering energy consumption. When the connecting block 603 is moved to contact the top block 606, at this time... Before the reciprocating component 4 reaches the end of its movement, as it continues to move, the transmission block 5 drives the rotating plate 602 to rotate relative to the connecting block 603 via the connecting plate 601. The pressing block 604 is pressed into the groove by the arc surface. When the rotating plate 602 rotates relative to the connecting block 603 to the side wall of the dispersion box 2 and continues to rotate, the pressing block 604 is ejected out of the groove by the elastic element 605. The rotating plate 602 continues to rotate under the pressing action of the pressing block 604, eventually forming a conical structure facing the center of the dispersion box 2 again. Then, the reciprocating movement drives the pushing mechanism to move again. In this way, throughout the entire process driven by the reciprocating component 4, the pushing mechanism always maintains a conical structure facing the center of the dispersion box 2 to push the particles, ensuring the complete automatic operation of the device. At the same time, the mechanism has a simple structure. During the process of the particles falling to the top of the sieve plate 1002, the top of the pushing mechanism will not affect the falling of the particles. The overall movement process can continuously push the particles to move on the sieve plate 1002 while the particles are falling.

[0034] Example 2 like Figure 7 and Figure 8 As shown, based on embodiment 1, it also includes a dispersing cylinder 8. The dispersing cylinder 8 is provided at the discharge port of the crushing component 7. The bottom of the inner side of the dispersing cylinder 8 is a cone shape with an upward convex shape. Multiple material dropping holes 801 are evenly spaced in a ring at the bottom of the dispersing cylinder 8.

[0035] The dispersing cylinder 8 at the bottom of the crushing component 7 can perform a preliminary diversion effect on the crushed particles. After being crushed by the crushing component 7, the masterbatch falls directly into the dispersing cylinder 8 and then disperses into the dispersing box 2 through multiple discharge holes 801. The conical structure inside the dispersing cylinder 8 can ensure that the particles can be completely discharged from the dispersing cylinder 8 through the discharge holes 801.

[0036] like Figure 11 and Figure 12 As shown, based on embodiment 1, it also includes a transmission column 1004 and a cylinder 1005. A square hole is opened at the top of the mounting sleeve 1001, which is directly opposite to the reciprocating assembly 4. A corrugated groove 1003 is opened on the sieve plate 1002, which is directly opposite to the square hole. The bottom of the transmission block 5 is provided with a transmission column 1004, and the bottom of the transmission column 1004 is provided with a cylinder 1005. The cylinder 1005 slides in the corrugated groove 1003.

[0037] When the reciprocating assembly 4 drives the transmission block 5 to reciprocate along the partition plate 3, the transmission block 5 can drive the cylinder 1005 to reciprocate linearly along the partition plate 3 through the transmission column 1004. During this process, the cylinder 1005, through its cooperation with the corrugated groove 1003, drives the screen plate 1002 to continuously and rapidly reciprocate laterally relative to the partition plate 3 within the mounting sleeve 1001, thereby achieving rapid shaking of the crushed particles, improving the screening effect of plastic particles, and ensuring that the plastic particles can be screened within the time interval of the reciprocating movement of the pushing mechanism 6.

[0038] like Figure 9 and Figure 10 As shown, based on Embodiment 1, it also includes a first pipe 901, which is located below two symmetrical discharge holes 801 at the bottom of the dispersing cylinder 8; a discharge box 9, which is connected to the bottom of the two first pipes 901, and the bottom of the discharge box 9 has a long conical opening; a second pipe 902, which is located below the discharge holes 801 on both sides of the first pipe 901 at the bottom of the dispersing cylinder 8; and a conveying pipe 903, which is connected to both the second pipe 902 and the discharge box 9.

[0039] After the crushed plastic particles are dispersed and fall through the dispersing cylinder 8, they enter the feeding box 9 through the first pipe 901 and the second pipe 902. Then, they fall accurately through the long conical opening at the bottom of the feeding box 9 to the middle of the screen plate 1002 and form a long strip of parallel partition plate 3. The structure of the conveying pipe 903 arranged along the length of the feeding box 9 can make the plastic particles enter the feeding box 9 evenly and ensure that the plastic particles fall evenly to the middle of the screen plate 1002, which is convenient for contact and cooperation with the conical pushing mechanism 6.

[0040] Although the invention has been described with reference to exemplary embodiments, it should be understood that the invention is not limited to the disclosed exemplary embodiments. The scope of the following claims should be given the broadest interpretation so as to cover all variations and equivalent structures and functions.

Claims

1. A pretreatment device for rheology masterbatch for multilayer co-extruded PE cast film, characterized in that: include: The mounting frame (1) and the dispersion box (2) are mounted on top of the mounting frame (1). The dispersion box (2) is provided with a material hopper at the middle and both sides of the bottom of the dispersion box (2). The top of the dispersion box (2) is provided with a crushing component (7). The inner side of the dispersion box (2) is provided with a frame-shaped mounting sleeve (1001). The middle of the mounting sleeve (1001) is provided with a slidable sieve plate (1002). The top two sides of the sieve plate (1002) are symmetrically provided with discharge ports. The two sides of the dispersion box (2) away from the discharge ports are provided with partition plates (3). The two partition plates (3) and the dispersion box (2) are provided with a reciprocating component (4) that moves along the length of the partition plate (3). The moving parts of the reciprocating component (4) near the two partition plates are connected with transmission blocks (5). The two transmission blocks (5) are provided with a pushing mechanism (6) that pushes the particles on the sieve plate (1002) and disperses and assists in screening.

2. The pretreatment apparatus for rheology masterbatch for multilayer co-extruded PE cast film according to claim 1, characterized in that: The push mechanism (6) specifically includes: The connecting plate (601) is slidably provided on the side of the two partition plates (3) that are close to each other. The transmission block (5) is rotatably connected to the close connecting plate (601). A rotating plate (602) is sleeved between the close ends of the two connecting plates (601). The close ends of the two rotating plates (602) are elliptical. A connecting block (603) is rotatably connected between the two rotating plates (602). A sliding groove is opened in the connecting block (603) facing the rotating plate (602). A pressing block (604) is slidably provided in the sliding groove. The end of the pressing block (604) close to the rotating plate (602) is elliptical and contacts and cooperates with it. An elastic element (605) is provided in both the pressing block (604) and the sliding groove. A top block (606) is provided in the inner side of the dispersion box (2) facing the connecting block. The top block (606) contacts the connecting block (603).

3. A pretreatment apparatus for rheology masterbatch for multilayer co-extruded PE cast film according to claim 2, characterized in that: it also... include: Dispersion cylinder (8), the discharge port of the crushing component (7) is provided with a dispersion cylinder (8), the bottom of the inner side of the dispersion cylinder (8) is a cone shape with an upward convex shape, and a plurality of material dropping holes (801) are evenly spaced in a ring at the bottom of the dispersion cylinder (8).

4. A pretreatment apparatus for rheology masterbatch for multilayer co-extruded PE cast film according to claim 3, characterized in that: it also... include: The transmission column (1004) and the cylinder (1005) are provided. The top of the mounting sleeve (1001) is provided with a square hole facing the reciprocating assembly (4). The screen plate (1002) is provided with a corrugated groove (1003) facing the square hole. The bottom of the transmission block (5) is provided with a transmission column (1004). The bottom of the transmission column (1004) is provided with a cylinder (1005). The cylinder (1005) slides in the corrugated groove (1003).

5. A pretreatment apparatus for rheology masterbatch for multilayer co-extruded PE cast film according to claim 4, characterized in that: [further details needed]. include: The first pipe (901) is provided at the bottom of the dispersion cylinder (8) below two symmetrical discharge holes (801). The bottom of the two first pipes (901) is connected to a discharge box (9). The bottom of the discharge box (9) is a long conical opening. The bottom of the dispersion cylinder (8) is provided with a second pipe (902) below the discharge holes (801) on both sides of the first pipe (901). The second pipe (902) and the discharge box (9) are connected by a conveying pipe (903).

6. A pretreatment apparatus for rheology masterbatch for multilayer co-extruded PE cast film according to claim 5, characterized in that: The connection points of the conveying pipes (903) on both sides of the material drop box (9) are set in a manner that is one closer to the center of the material drop box (9) and the other farther away.

7. A pretreatment apparatus for rheology masterbatch for multilayer co-extruded PE cast film according to claim 2, characterized in that: The distance between the farthest ends of the reciprocating components (4) on the partition plate (3) is greater than the distance between the two discharge ports on the screen plate (1002).

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