A twin-screw extrusion process for PE board processing

Abstract

The present invention relates to the technical field of PE board production and processing, specifically to a twin-screw extrusion process for PE board processing, comprising the following steps: raw materials are fed into a material holding barrel for mixing, the mixed raw materials fall into a conveying bin, at this time, a first motor is started and a conveying rod, an intermediate rod and an extrusion rod are driven to rotate coaxially through a first active tooth and a first driven tooth; the raw materials move into a heating bin under the action of the conveying rod, and at the same time, a second motor is started to drive the shaft to rotate and drive the spiral plate and the shovel plate to rotate through a first gear and a gear ring, and the raw material fusion is accelerated under the action of a stirring rod. By setting a first cleaning component, the process can clean the inner wall of the heating bin, and at the same time, it can avoid that at the end of a batch of PE board processing, molten raw materials remain in the heating bin due to the reduction of raw materials; at the same time, by setting a second cleaning component, the surface of the auger can be cleaned after a batch of PE board processing is completed.

Description

Technical Field

[0001] The invention relates to the technical field of PE board production and processing, in particular to a twin-screw extrusion process for PE board processing. Background Art

[0002] PE board is a thermoplastic resin board. During processing and production, the raw materials are sent to the material holding device through a conveying pipe for mixing, and then sent to a twin-screw extruder for melting. The molten raw materials are squeezed into a cooling mold through the extrusion port for shaping.

[0003] For example, the invention patent with authorization announcement number CN118596444A in the field of foaming extrusion device technology discloses a PVC carbon dioxide high-foaming molding extrusion device and method, including: a base, a horizontally arranged cylinder shell is fixedly installed on the top of which, a lower port of a feeding pipe is fixedly connected to the top of one side of the cylinder shell, and heating modules distributed at equal intervals are fixedly embedded on the side wall of the cylinder shell for melting the raw materials; it also includes: a tail end sleeve, which is located directly below the feeding pipe, the tail end sleeve is coaxially fitted on the inner wall of the cylinder shell, and the end of the tail end sleeve is coaxially fixedly installed with a connecting shaft, and the connecting shaft rotates and penetrates the end of the cylinder shell.

[0004] Combining the above cases and actual conditions, we found the following problems: In the twin-screw extrusion process, each raw material needs to be heated and melted, and the molten raw material has a certain viscosity, so that after heating, the molten raw material is easy to adhere to the surface of the heating bin and the surface of the auger of the extrusion part. This results in a lot of time and manpower required to clean the inside of the extruder after a batch of PE sheets are produced, affecting the production efficiency of the PE sheets, and the residual molten raw materials will also affect the production quality of the next batch of PE sheets. Summary of the invention

[0005] In order to overcome the defects in the prior art, the purpose of the present invention is to provide a twin-screw extrusion process for PE board processing to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides a twin-screw extrusion process for PE board processing, comprising the following steps:

[0007] S1, the raw materials are fed into the material holding barrel for mixing, and the mixed raw materials fall into the conveying bin, at which time the first motor is started and the conveying rod, the intermediate rod and the extrusion rod are driven to rotate coaxially through the first driving gear and the first driven gear;

[0008] S2, the raw material moves into the heating chamber under the action of the conveying rod and melts under the heating of the heating chamber. At the same time, the second motor is started to drive the shaft to rotate and drive the spiral plate and the shovel plate to rotate through the first gear and the gear ring, and the raw material fusion is accelerated under the action of the stirring rod;

[0009] S3, the raw materials entering from the right side continuously push the molten raw materials in the heating chamber to move to the left. When the raw materials are squeezed into the extrusion chamber, the rotating extrusion rod will continuously drive the molten raw materials to be squeezed out from the extrusion port to the template for cooling and forming;

[0010] S4. After the heating chamber cools down, the electromagnet is turned on, and the first motor is started again to drive the middle rod to rotate so that the position of the iron block corresponds to the position of the electromagnet. The iron block is attracted upward by magnetic force to separate from the middle rod and move up along the limit plate and is fixed to the electromagnet. After that, the middle rod continues to rotate to reel in the first rope, and then the scraper is pulled to the right, so that the scraper slides to the right along the sliding rod to clean the surface of the auger.

[0011] In the technical solution of the present invention, a shell assembly for the process is adopted, and the shell assembly is composed of a conveying bin for driving the raw material to move to the left, a heating bin for heating the molten raw material, and an extrusion bin for extruding the molten raw material from right to left. A material holding barrel for holding mixed raw materials is connected above the conveying bin. An extrusion assembly is symmetrically arranged in the front and back of the shell assembly. The extrusion assembly includes a conveying rod arranged in the conveying bin, an intermediate rod arranged in the heating bin, and an extrusion rod arranged in the extrusion bin. The conveying rod, the intermediate rod and the extrusion rod are coaxially fixedly connected in sequence from right to left. A first cleaning assembly for cleaning the inner wall of the heating bin is arranged in the heating bin.

[0012] The first cleaning assembly includes a second motor, a shaft coaxially fixed to the output shaft of the second motor, and a transmission structure provided at the left and right ends of the shaft for transmission connection, the transmission structure includes a first gear coaxially fixed to the end of the shaft and a gear ring located directly below the first gear, a spiral plate is fixed to the left ring wall of the right gear ring, and a shovel plate is fixed to the right ring wall of the left and right gear rings, the right side of the shovel plate is fixedly connected to the left end of the spiral plate, and a plurality of regularly distributed stirring rods are fixed to the inner side wall of the spiral plate;

[0013] The extrusion rod is provided with two second cleaning components arranged on the left and right sides of the auger, the second cleaning component includes a cleaning plate structure, a rope winding rod for driving the cleaning plate structure to reset, and a second rope wound around the left end of the rope winding rod, the cleaning plate structure includes a scraper fitted with the surface of the corresponding side auger on the extrusion rod, a sliding rod slidably connected to the corresponding side scraper, and a first rope for pulling the scraper to move, an iron block is embedded at the right end of the side wall of the middle rod, and electromagnets are symmetrically fixed to the right side wall of the heating chamber at the position corresponding to the iron block.

[0014] In the technical solution of the present invention, a mounting plate is fixed on the right side of the top surface of the extrusion bin, the second motor is fixed on the right side wall of the mounting plate, a horizontal shaft rod groove is provided on the top of the heating bin, the shaft rod is arranged in the shaft rod groove, the wall of the heating bin is provided with an engaging groove corresponding to the position size of the first gear, and the gear ring is embedded in the wall of the heating bin.

[0015] In the technical solution of the present invention, a fixing rod is symmetrically fixed to the left side wall of the heating bin near the top, the fixing rod is L-shaped and a slanted plate is fixedly connected to the bottom end of the vertical section, the right end of the slanted plate is high and the left end is low, and the limit plate corresponds to the position of the shovel plate.

[0016] In the technical solution of the present invention, the sliding rod is spirally wound on the extrusion rod and both ends are fixed to the rod wall of the extrusion rod. The number of spiral turns of the sliding rod is the same as the number of spiral turns of the auger on the extrusion rod. The first rope located in the extrusion bin is wound on the rod wall of the extrusion rod along the spiral direction of the auger on the extrusion rod.

[0017] In the technical solution of the present invention, a limiting block is fixed on the right side wall of the iron block, and a limiting plate corresponding to the position of the limiting block is symmetrically fixed on the right side wall of the heating bin, and the bottom end of the limiting plate is in contact with the wall of the middle rod.

[0018] In the technical solution of the present invention, the right end of the first rope located in the heating chamber passes through the wall of the middle rod and is fixed to the bottom end surface of the iron block.

[0019] In the technical solution of the present invention, the left end of the rope winding rod coaxially passes through the corresponding transmission rod and the intermediate rod from right to left in sequence and the left end of the rope winding rod extends into the extrusion rod. One end of the second rope is wound around the rope winding rod, and the other end passes through the left end of the extrusion rod and is fixed on the rear side of the corresponding scraper.

[0020] In the technical solution of the present invention, a cleaning ring is provided on the outer sleeve of the left end of the rod wall of the intermediate rod, and the first rope is fixedly connected to the cleaning ring.

[0021] In the technical solution of the present invention, a driving bin is fixed on the right side of the conveying bin, and a first driven tooth coaxially fixed to the right end of the conveying rod is symmetrically arranged on the left side wall inside the driving bin, and a first driving tooth is meshed between the two first driven teeth. A first motor is fixed on the bottom surface of the driving bin, and the output shaft of the first motor is coaxially fixed to the first driving tooth. A third motor is fixed to the middle part of the right side inner wall of the driving bin, and a second driving tooth is coaxially fixed to the output shaft of the third motor, and second driven teeth are meshed on the front and rear sides of the second driving tooth, and the right end of the rope winding rod passes through the left side wall of the driving bin and is coaxially fixedly connected to the corresponding second driven tooth.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. In the present invention, by setting up the first cleaning component, when heating and melting the raw materials, the second motor is started to drive the shaft to rotate and drive the spiral plate and the shovel plate to rotate through the first gear and the gear ring, so as to clean the inner wall of the heating chamber and accelerate the fusion of the raw materials under the action of the stirring rod.

[0024] 2. In the present invention, when cleaning the inner wall of the heating bin, when the subsequent raw materials decrease, the spiral plate can also push a small amount of molten raw materials to move to the left, so as to avoid the molten raw materials in the heating bin being unable to be squeezed to the left due to the reduction of raw materials at the end of a batch of production. At the same time, when the shovel plate rotates to the bottom of the heating bin, the molten raw materials remaining at the bottom will be shoveled up, and when the shovel plate rotates to the top, the molten raw materials slide down the inclined plate under the action of their own gravity, and then slide into the extrusion bin, so as to avoid the molten raw materials remaining at the connection point between the heating bin and the extrusion bin.

[0025] 3. In the present invention, by setting a second cleaning component, after a batch of PE plates are processed, the electromagnet is turned on, and the iron block is attracted upward and fixed to the electromagnet through the magnetic force of the electromagnet. Then, the middle rod is continuously rotated to reel in the right end of the first rope, and then the scraper is pulled to the right, so that the scraper slides to the right along the slide bar to clean the surface of the auger. After the cleaning is completed, the electromagnet is turned off, and the iron block falls along the limit plate under the action of its own gravity. Then, the rope winding rod is rotated to pull the scraper back through the second rope to achieve the reset of the scraper. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings described herein are only for explanation purposes and are not intended to limit the scope of the present invention in any way. In addition, the shapes and proportional dimensions of the various components in the figures are only schematic, used to help understand the present invention, and are not specifically limited to the shapes and proportional dimensions of the various components of the present invention. Those skilled in the art can select various possible shapes and proportional dimensions to implement the present invention according to the teachings of the present invention.

[0027] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0028] Figure 2 It is a schematic diagram of the internal structure of the overall structure in the present invention.

[0029] Figure 3 It is a schematic diagram of the first cleaning component in the present invention.

[0030] Figure 4 It is a schematic diagram of the interior of the heating part in the present invention.

[0031] Figure 5 It is a schematic diagram of the extrusion part in the present invention.

[0032] Figure 6 It is a schematic diagram of the second cleaning component in the present invention.

[0033] Figure 7 This is a schematic diagram from another perspective of the second cleaning component in the present invention.

[0034] Figure 8 It is a schematic diagram of the pullback structure in the present invention.

[0035] Fig. 9 It is a cross-sectional view of the intermediate rod in the present invention.

[0036] Fig.10 It is a schematic diagram of the interior of the driving unit in the present invention.

[0037] Description of reference numerals:

[0038] 1. Shell assembly; 11. Material holding barrel; 12. Conveying chamber; 13. Heating chamber; 131. Engaging groove; 132. Shaft groove; 133. Inclined plate; 134. Fixed rod; 135. Limiting plate; 14. Extrusion chamber; 15. Driving chamber; 16. Mounting plate;

[0039] 2. Extrusion assembly; 21. Transmission rod; 22. Intermediate rod; 23. Extrusion rod; 24. First driven tooth; 25. First driving tooth; 26. First motor;

[0040] 3. First cleaning assembly; 31. Second motor; 32. Shaft; 33. Transmission structure; 331. First gear; 332. Gear ring; 34. Spiral plate; 341. Stirring rod; 35. Shovel plate;

[0041] 4. Second cleaning assembly; 41. Cleaning plate structure; 411. Scraper; 412. Sliding rod; 413. First rope; 42. Rope winding rod; 43. Second rope; 44. Cleaning ring; 45. Iron block; 451. Limiting block; 46. Third motor; 47. Second driving tooth; 48. Second driven tooth;

[0042] 5. Electromagnet. DETAILED DESCRIPTION

[0043] The details of the present invention can be more clearly understood by combining the accompanying drawings with the description of the specific embodiments of the present invention. However, the specific embodiments of the present invention described herein are only used for the purpose of explaining the present invention and cannot be understood as limiting the present invention in any way. Under the guidance of the present invention, technicians can conceive of any possible variations based on the present invention, which should be regarded as falling within the scope of the present invention. The terms "installation" and "connection" should be understood in a broad sense, which can be directly connected or indirectly connected through an intermediate medium.

[0044] The terms "central axis", "vertical", "horizontal", "front", "back", "up", "down", "left", "right", "top", "bottom", "inside", "outside" and the like used herein to indicate positions or positional relationships are based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the equipment or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, in the description of the present invention, the meaning of "several" is two or more, unless otherwise clearly and specifically defined.

[0045] See also Figure 1-Figure 10 As shown, this embodiment provides a technical solution:

[0046] A twin-screw extrusion process for PE board processing comprises the following steps:

[0047] S1, the raw materials are fed into the material holding barrel 11 for mixing, and the mixed raw materials fall into the conveying bin 12, at which time the first motor 26 is started and driven by the first driving gear 25 and the first driven gear 24 to drive the conveying rod 21, the intermediate rod 22 and the extrusion rod 23 to rotate coaxially;

[0048] S2, the raw material moves into the heating chamber 13 under the action of the conveying rod 21, and melts under the heating of the heating chamber 13. At the same time, the second motor 31 is started to drive the shaft 32 to rotate and drive the spiral plate 34 and the shovel plate 35 to rotate through the first gear 331 and the gear ring 332, and the raw material fusion is accelerated under the action of the stirring rod 341;

[0049] S3, the raw materials entering from the right side continuously push the molten raw materials in the heating chamber 13 to move to the left. When the raw materials are squeezed into the extrusion chamber 14, the rotating extrusion rod 23 continuously drives the molten raw materials to be squeezed out from the extrusion port to the template for cooling and forming;

[0050] S4. After the heating chamber 13 cools down, the electromagnet 5 is turned on, and the first motor 26 is started again to drive the middle rod 22 to rotate so that the position of the iron block 45 corresponds to the position of the electromagnet 5. The iron block 45 is attracted upward by magnetic force to separate from the middle rod 22 and move up along the limit plate 135 and be fixed to the electromagnet 5. After that, the middle rod 22 continues to rotate to reel in the first rope 413, and then the scraper 411 is pulled to the right, so that the scraper 411 slides to the right along the slide rod 412 to clean the surface of the auger.

[0051] Among them, Figure 1-Figure 4As shown, the housing component 1 is composed of a conveying bin 12 for driving the raw materials to move to the left, a heating bin 13 for heating the molten raw materials, and an extrusion bin 14 for extruding the molten raw materials from right to left. A material holding barrel 11 for holding mixed raw materials is connected above the conveying bin 12. When the PE sheet is processed, each raw material is fed into the material holding barrel 11 through a conveying pipe and mixed in the material holding barrel 11. An extrusion component 2 is symmetrically arranged in the housing component 1. The extrusion component 2 includes a conveying rod 21 arranged in the conveying bin 12, an intermediate rod 22 arranged in the heating bin 13, and an extrusion rod 23 arranged in the extrusion bin 14. The rod walls of the conveying rod 21 and the extrusion rod 23 are both provided with augers, which will not be described in detail here. The conveying rod 21, the intermediate rod 22 and the extrusion rod 23 are coaxially fixedly connected from right to left in sequence. Each raw material enters the heating bin 13 for heating under the conveyance of the conveying rod 21, and is squeezed to the left during the subsequent raw material entry process so that the molten raw material moves to the left and enters the extrusion bin 14. A first cleaning component 3 for cleaning the inner wall of the heating bin 13 is provided in the heating bin 13.

[0052] The first cleaning assembly 3 includes a second motor 31, a shaft 32 coaxially fixed to the output shaft of the second motor 31, and a transmission structure 33 provided at the left and right ends of the shaft 32 for transmission connection. The transmission structure 33 includes a first gear 331 coaxially fixed to the end of the shaft 32 and a gear ring 332 located directly below the first gear 331. A spiral plate 34 is fixed to the left side ring wall of the right gear ring 332. A shovel plate 35 is fixed to the right side ring wall of the left and right gear rings 332. The right side of the shovel plate 35 is fixedly connected to the left end of the spiral plate 34. A plurality of regularly distributed stirring rods 341 are fixed to the inner side wall of the spiral plate 34.

[0053] During the processing of PE sheets, the second motor 31 drives the gear ring 332 to rotate through the shaft 32 and the first gear 331 at both ends of the shaft 32, thereby causing the spiral plate 34 to rotate synchronously. The outer surface of the spiral plate 34 is in contact with the inner wall of the heating bin 13. During the rotation, the inner wall of the heating bin 13 is cleaned to prevent the molten raw material from sticking to the inner wall of the heating bin 13. At the same time, since the spiral plate 34 is spiral-shaped, when the subsequent raw material is reduced, the spiral plate 34 can also push a small amount of molten raw material to move to the left, thereby preventing the molten raw material in the heating bin 13 from being squeezed to the left due to the reduction of raw materials at the end of a batch of production.

[0054] Specifically, a mounting plate 16 is fixed to the right side of the top surface of the extrusion bin 14, and the second motor 31 is fixed to the right side wall of the mounting plate 16. A horizontal shaft groove 132 is provided on the top of the heating bin 13, and the output shaft of the second motor 31 passes through the shaft groove 132 and extends into the shaft groove 132. The shaft 32 is arranged in the shaft groove 132, and the right end of the shaft 32 is rotatably connected to the right side inner wall of the shaft groove 132. The wall of the heating bin 13 is provided with an engaging groove 131 corresponding to the position and size of the first gear 331, and the gear ring 332 is embedded in the wall of the heating bin 13.

[0055] Furthermore, a fixing rod 134 is symmetrically fixed to the left side wall of the heating bin 13 near the top, and the fixing rod 134 is L-shaped and a slanted plate 133 is fixedly connected to the bottom of the vertical section. The right end of the slanted plate 133 is high and the left end is low, and the limit plate 135 corresponds to the position of the shovel plate 35. When the gear ring 332 drives the spiral plate 34 to rotate, the shovel plate 35 will rotate together. When the shovel plate 35 rotates to the bottom of the heating bin 13, it will shovel up the molten raw material remaining at the bottom, and when the shovel plate 35 rotates to the top, the molten raw material slides down the slanted plate 133 under the action of its own gravity, and then slides into the extrusion bin 14, so as to avoid the molten raw material remaining at the connection between the heating bin 13 and the extrusion bin 14.

[0056] In addition, if Figure 5-Figure 9 As shown, the extrusion rod 23 is provided with two second cleaning components 4 arranged on the left and right sides of the auger, the second cleaning component 4 includes a cleaning plate structure 41, a rope rod 42 for driving the cleaning plate structure 41 to reset, and a second rope 43 wound around the left end of the rope rod 42, the cleaning plate structure 41 includes a scraper 411 attached to the surface of the corresponding side auger on the extrusion rod 23, a slide rod 412 slidably connected to the corresponding side scraper 411, and a first rope 413 for pulling the scraper 411 to move. After the production of a batch of PE boards is completed, by pulling the first rope 413 to the right, the scraper 411 will be pulled to slide along the slide rod 412 to clean the molten raw materials remaining on the surface of the auger;

[0057] Specifically, the sliding rod 412 is spirally wound around the extrusion rod 23 and both ends are fixed to the rod wall of the extrusion rod 23. The number of spiral turns of the sliding rod 412 is the same as the number of spiral turns of the auger on the extrusion rod 23, and the spiral angle is also the same, so that the scraper 411 can always fit the surface of the auger when sliding along the sliding rod 412, and the first rope 413 located in the extrusion bin 14 is wound around the rod wall of the extrusion rod 23 along the spiral direction of the auger on the extrusion rod 23. It should be noted that the first rope 413 in the accompanying drawings is only a position indication, and the first rope 413 is always taut and wound along the auger during the pulling process.

[0058] In addition, an iron block 45 is embedded in the side wall of the middle rod 22 near the right end, a limit block 451 is fixed to the right side wall of the iron block 45, a limit plate 135 corresponding to the position of the limit block 451 is symmetrically fixed to the right side wall of the heating chamber 13, the bottom end of the limit plate 135 is in contact with the rod wall of the middle rod 22, the right end of the first rope 413 located in the inner part of the heating chamber 13 passes through the rod wall of the middle rod 22 and is fixed to the bottom end face of the iron block 45, and an electromagnet 5 is symmetrically fixed to the right side wall of the heating chamber 13 at the position corresponding to the iron block 45;

[0059] When it is necessary to clean the auger, after the heating chamber 13 is cooled down, the electromagnet 5 is turned on, and the middle rod 22 is rotated so that the position of the iron block 45 corresponds to the position of the electromagnet 5. The iron block 45 is attracted upward by magnetic force to separate from the middle rod 22 and move up along the limit plate 135 and be fixed with the electromagnet 5. Then, the middle rod 22 is continuously rotated to play the role of winding up the right end of the first rope 413, and then the scraper 411 is pulled to the right, so that the scraper 411 slides to the right along the slide rod 412 to clean the surface of the auger. A cleaning ring 44 is provided on the outer sleeve of the rod wall of the middle rod 22 near the left end. The first rope 413 is fixedly connected to the cleaning ring 44. When the first rope 413 moves to the right, it will drive the cleaning ring 44 to move to the right synchronously to clean the middle rod 22.

[0060] It should be noted that the first rope 413 is in a taut state, the stirring rod 341 will not contact the first rope 413, and the electromagnet 5 is provided with a ceramic heat-insulating protective sleeve, which will not affect the magnetism of the electromagnet 5. Generally, when processing PE boards, the melting temperature is about 200°C, and the maximum working temperature of the electromagnet 5 is generally 600°C. In addition, the electromagnet 5 used in the present invention is used after cooling after the production is completed.

[0061] Furthermore, the left end of the rope winding rod 42 coaxially passes through the corresponding transmission rod 21 and the intermediate rod 22 from right to left in sequence, and the left end of the rope winding rod 42 extends into the extrusion rod 23. One end of the second rope 43 is wound around the rope winding rod 42, and the other end passes through the left end of the extrusion rod 23 and is fixed on the rear side of the corresponding scraper 411. When the cleaning is completed, the intermediate rod 22 is rotated to make the iron block 45 correspond to the embedded hole on the original intermediate rod 22, and then the electromagnet 5 is turned off. The iron block 45 falls along the limit plate 135 under the action of its own gravity. Then, the rope winding rod 42 is rotated to pull back the scraper 411 through the second rope 43, thereby resetting the scraper 411.

[0062] In addition, a driving bin 15 is fixed to the right side of the conveying bin 12, and a first driven tooth 24 coaxially fixed to the right end of the conveying rod 21 is symmetrically arranged on the left side wall of the driving bin 15, and a first driving tooth 25 is meshed between the two first driven teeth 24. A first motor 26 is fixed to the bottom surface of the driving bin 15, and the output shaft of the first motor 26 is coaxially fixed to the first driving tooth 25. The first motor 26 drives the conveying rod 21 to rotate through the first driving tooth 25 and the first driven tooth 24. A third motor 46 is fixed to the middle part of the right inner wall of the driving bin 15, and the output shaft of the third motor 46 is coaxially fixed with a second driving tooth 47, and the second driven teeth 48 are meshed on the front and rear sides of the second driving tooth 47. The right end of the rope winding rod 42 passes through the left side wall of the driving bin 15 and is coaxially fixedly connected with the corresponding second driven tooth 48. The third motor 46 drives the rope winding rod 42 to rotate through the second driving tooth 47 and the second driven tooth 48.

[0063] It should be noted that the above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with the technology to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A twin-screw extrusion process for PE board processing, characterized in that: The following steps are involved: S1, feeding the raw materials into the material holding barrel (11) for mixing, and the mixed raw materials fall into the conveying bin (12), at which time the first motor (26) is started and the transmission rod (21), the intermediate rod (22) and the extrusion rod (23) are driven to rotate coaxially through the first driving gear (25) and the first driven gear (24); S2, the raw material moves into the heating chamber (13) under the action of the conveying rod (21) and melts under the heating of the heating chamber (13). At the same time, the second motor (31) is started to drive the shaft (32) to rotate and drive the spiral plate (34) and the shovel plate (35) to rotate and clean the inner wall of the heating chamber (13) through the first gear (331) and the gear ring (332). The raw material fusion is accelerated under the action of the stirring rod (341); S3, the raw materials entering from the right side continuously push the molten raw materials in the heating chamber (13) to move to the left, and when the raw materials are squeezed into the extrusion chamber (14), the rotating extrusion rod (23) continuously drives the molten raw materials to be squeezed out from the extrusion port onto the template for cooling and forming; S4, after the temperature of the heating chamber (13) has dropped, the electromagnet (5) is turned on, and the first motor (26) is started again to drive the intermediate rod (22) to rotate so that the position of the iron block (45) corresponds to the position of the electromagnet (5), and the iron block (45) is attracted upward by magnetic force to separate from the intermediate rod (22) and move upward along the limit plate (135) and be fixed to the electromagnet (5), and then the intermediate rod (22) continues to rotate, so that the first rope (413) can be reeled in, and then the scraper (411) is pulled to the right, so that the scraper (411) slides to the right along the slide rod (412) to clean the surface of the auger; The invention comprises a shell component (1) used for the process, wherein the shell component (1) comprises, from right to left, a conveying bin (12) for driving the raw material to move to the left, a heating bin (13) for heating the molten raw material, and an extrusion bin (14) for extruding the molten raw material, wherein the conveying bin (12) is connected to a material holding barrel (11) for holding the mixed raw material above, and is characterized in that: an extrusion component (2) is symmetrically arranged in the shell component (1) front and back, and the extrusion component (2) comprises a conveying rod (21) arranged in the conveying bin (12), an intermediate rod (22) arranged in the heating bin (13), and an extrusion rod (23) arranged in the extrusion bin (14), wherein the conveying rod (21), the intermediate rod (22), and the extrusion rod (23) are coaxially fixedly connected in sequence from right to left, and a first cleaning component (3) for cleaning the inner wall of the heating bin (13) is arranged in the heating bin (13); The first cleaning assembly (3) comprises a second motor (31), a shaft (32) coaxially fixed to an output shaft of the second motor (31), and a transmission structure (33) provided at left and right ends of the shaft (32) for transmission connection, the transmission structure (33) comprising a first gear (331) coaxially fixed to the end of the shaft (32) and a toothed ring (332) located directly below the first gear (331), a spiral plate (34) being fixed to the left side ring wall of the toothed ring (332) on the right side, and a shovel plate (35) being fixed to the right side ring wall of the toothed ring (332) on the left and right sides, the right side of the shovel plate (35) being fixedly connected to the left end of the spiral plate (34), and a plurality of regularly distributed stirring rods (341) being fixed to the inner side wall of the spiral plate (34); The extrusion rod (23) is provided with two second cleaning components (4) arranged on the left and right sides of the auger. The second cleaning components (4) include a cleaning plate structure (41), a rope winding rod (42) for driving the cleaning plate structure (41) to reset, and a second rope (43) wound around the left end of the rope winding rod (42). The cleaning plate structure (41) includes a scraper (411) attached to the surface of the corresponding side auger on the extrusion rod (23), a sliding rod (412) slidably connected to the corresponding side scraper (411), and a first rope (413) for pulling the scraper (411) to move. An iron block (45) is embedded at the right end of the side wall of the intermediate rod (22), and an electromagnet (5) is symmetrically fixed to the right side wall of the heating chamber (13) at a position corresponding to the position of the iron block (45).

2. The twin-screw extrusion process for PE board processing according to claim 1, characterized in that: A mounting plate (16) is fixed to the right side of the top surface of the extrusion chamber (14); the second motor (31) is fixed to the right side wall of the mounting plate (16); a horizontal shaft groove (132) is provided at the top of the heating chamber (13); the shaft (32) is arranged in the shaft groove (132); a meshing groove (131) corresponding to the position and size of the first gear (331) is provided on the wall of the heating chamber (13); and the gear ring (332) is embedded in the wall of the heating chamber (13).

3. The twin-screw extrusion process for PE board processing according to claim 2, characterized in that: A fixing rod (134) is fixed symmetrically front and back to the top of the left side wall of the heating bin (13); the fixing rod (134) is L-shaped and a sloping plate (133) is fixedly connected to the bottom end of the vertical section; the right end of the sloping plate (133) is higher and the left end is lower; and the position of the limiting plate (135) corresponds to that of the shovel plate (35).

4. The twin-screw extrusion process for PE board processing according to claim 3, characterized in that: The slide bar (412) is spirally wound around the extrusion rod (23) and its two ends are fixed to the rod wall of the extrusion rod (23). The number of spiral turns of the slide bar (412) is the same as the number of spiral turns of the auger on the extrusion rod (23). The first rope (413) located in the extrusion chamber (14) is wound around the rod wall of the extrusion rod (23) along the spiral direction of the auger on the extrusion rod (23).

5. The twin-screw extrusion process for PE board processing according to claim 4, characterized in that: A limit block (451) is fixed to the right side wall of the iron block (45), and a limit plate (135) corresponding to the position of the limit block (451) is symmetrically fixed to the right side wall of the heating chamber (13) in the front and rear directions, and the bottom end of the limit plate (135) is in contact with the wall of the intermediate rod (22).

6. The twin-screw extrusion process for PE board processing according to claim 5, characterized in that: The right end of the first rope (413) located in the inner part of the heating chamber (13) passes through the wall of the middle rod (22) and is fixed to the bottom end surface of the iron block (45).

7. The twin-screw extrusion process for PE board processing according to claim 6, characterized in that: The left end of the rope winding rod (42) coaxially passes through the corresponding transmission rod (21) and the intermediate rod (22) from right to left in sequence, and the left end of the rope winding rod (42) extends into the extrusion rod (23); one end of the second rope (43) is wound around the rope winding rod (42), and the other end passes through the left end of the extrusion rod (23) and is fixed on the rear side of the corresponding scraper (411).

8. The twin-screw extrusion process for PE board processing according to claim 7, characterized in that: A cleaning ring (44) is provided on the outer cover of the left end of the rod wall of the intermediate rod (22), and the first rope (413) is fixedly connected to the cleaning ring (44).

9. The twin-screw extrusion process for PE board processing according to claim 8, characterized in that: A driving bin (15) is fixed on the right side of the transmission bin (12); a first driven tooth (24) coaxially fixed to the right end of the transmission rod (21) is symmetrically arranged on the left side wall of the driving bin (15) in the front and rear directions; a first driving tooth (25) is meshed between the two first driven teeth (24); a first motor (26) is fixed on the inner bottom surface of the driving bin (15); an output shaft of the first motor (26) is coaxially fixed to the first driving tooth (25); a third motor (46) is fixed to the middle of the right side inner wall of the driving bin (15); a second driving tooth (47) is coaxially fixed to the output shaft of the third motor (46); second driven teeth (48) are meshed on the front and rear sides of the second driving tooth (47); and the right end of the rope winding rod (42) passes through the left side wall of the driving bin (15) and is coaxially fixedly connected to the corresponding second driven tooth (48).

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