A screw extruder

Abstract

The utility model discloses a screw extruder, which relates to the technical field of material processing equipment. It includes a bottom plate, a top plate and a side plate, a barrel between the bottom plate and the top plate, an extrusion screw in the barrel, a driving device is arranged on one side of the feed end of the barrel, a cleaning component is arranged on the side plate, the barrel includes an upper barrel and a lower barrel, the upper barrel and the lower barrel are detachably connected, a feed hopper is connected to the feed end of the upper barrel, a first lifting component is arranged between the top plate and the upper barrel, and a second lifting component is arranged between the bottom plate and the lower barrel. The utility model can control the lifting of the upper barrel and the lower barrel and directly clean the barrel and the extrusion screw, saving time and labor; it can also completely remove the charred and carbonized residual materials, there is no cleaning dead corner, and the cleaning efficiency is high; in addition, when preparing different materials, it can be quickly cleaned after each extrusion, reducing the possibility of introducing impurities, and can be suitable for continuous production; at the same time, the material price is low and it is easy to use.

Description

Technical Field

[0001] The utility model relates to the technical field of material processing equipment, in particular to a screw extruder. Background Art

[0002] Screw extruders are often used to process plastics. They can effectively recycle and utilize resources. Screw extruders are an automatic feeding device that relies on the pressure and shear force generated by the rotation of the screw to fully plasticize and evenly mix the material and form it through a die.

[0003] During the production process of the screw extruder, after each production is completed, as the machine stops running, the raw materials remaining in the barrel and on the screw will gradually solidify and firmly adhere to the surface of the barrel and the screw. As the screw heats up during the next production, these residual materials will be burned or carbonized due to excessive heat, and will be extruded in the newly added liquefied raw materials, which will affect the product quality at the least and block the discharge port at the worst. Therefore, the screw extruder needs to be maintained and cleaned regularly.

[0004] At present, conventional extruders need to pull out the screw as a whole or disassemble the barrel for maintenance and internal cleaning (for example, the invention patent with application number CN202210392185.X discloses an extruder screw semi-automatic cleaning machine execution device, and its cleaning process requires the extruder screw to be removed and placed on the cleaning machine water tank for cleaning). The cleaning work is complicated, time-consuming and labor-intensive; in addition, the screw extruder can also be cleaned by adding cleaning liquid (for example, the utility model patent with application number CN202121646346.0 discloses a new single-screw extruder, and its cleaning process is to inject cleaning liquid into the barrel and the machine barrel and rotate the screw for cleaning), but the cleaning liquid can only rinse the residual material in the barrel and on the screw. The residual material that has been charred and carbonized and adhered to the surface of the barrel and the screw cannot be thoroughly cleaned, resulting in poor cleaning effect and reduced cleaning efficiency.

[0005] In view of this, it is necessary to provide a new screw extruder to solve the above-mentioned technical problems. Utility Model Content

[0006] The utility model aims to provide a screw extruder to solve the problems existing in the above-mentioned prior art.

[0007] To achieve the above-mentioned purpose, the utility model provides the following scheme: the utility model provides a screw extruder, comprising a bottom plate, a top plate is arranged above the bottom plate in parallel, a side plate is fixedly connected between the bottom plate and the top plate, a barrel is horizontally arranged between the bottom plate and the top plate, an extrusion screw is coaxially arranged in the barrel, the extrusion screw is adapted to the barrel, an extrusion head is detachably connected to the discharge end of the barrel, a driving device for controlling the rotation of the extrusion screw is arranged on one side of the feed end of the barrel, the driving device is fixedly connected to the bottom plate, a cleaning component is fixedly connected to the side plate, and the cleaning component is arranged corresponding to the barrel;

[0008] The barrel includes an upper barrel and a lower barrel, the upper barrel is detachably connected to the lower barrel, a feed hopper is connected to the feed end of the upper barrel, a first lifting assembly is fixedly connected between the top plate and the upper barrel, and a second lifting assembly is fixedly connected between the bottom plate and the lower barrel.

[0009] Preferably, the cleaning component includes a fixing bar fixedly connected to the side plate, the fixing bar being horizontally arranged, a slide groove being horizontally opened on the fixing bar, a first rotating support being provided on the fixing bar, the first rotating support being slidably connected to the fixing bar through the slide groove, and a control component for controlling the sliding of the first rotating support being installed in the fixing bar; a first rotating arm being rotatably connected to the first rotating support, a first rotating motor for controlling the rotation of the first rotating arm being fixedly connected to the first rotating support, an end of the first rotating arm away from the first rotating support being rotatably connected to the second rotating arm, a second rotating motor for controlling the rotation of the second rotating arm being installed on the first rotating arm, an end of the second rotating arm away from the first rotating arm being rotatably connected to a cleaning head, and a third rotating motor for controlling the rotation of the cleaning head being installed on the second rotating arm.

[0010] Preferably, the cleaning head includes a cylindrical steel brush, a scraper and a tool changing seat, the second rotating arm is rotatably connected to a bearing seat, the bearing seat is rotatably connected to a rotating disk, the center of the rotating disk is fixedly connected to a limiting seat, a receiving groove is provided in the limiting seat, a clamping plate is slidably connected in the receiving groove, a pressure spring is fixedly connected between the clamping plate and the bottom wall of the receiving groove, the tool changing seat passes through the limiting seat and is fixedly connected to the clamping plate, and the tool changing seat is used to install the cylindrical steel brush and the scraper.

[0011] Preferably, a plurality of inclined plates are provided in the feed hopper, and the plurality of inclined plates are staggered and fixed to the side walls of the feed hopper.

[0012] Preferably, the driving device includes a power motor and a transmission box, a workbench is fixedly connected to the base plate, and the power motor and the transmission box are fixedly mounted on the workbench.

[0013] Preferably, the first lifting assembly is a plurality of first hydraulic cylinders, the top of the first hydraulic cylinder is fixedly connected to the top plate, and the bottom of the first hydraulic cylinder is fixedly connected to the upper half of the cylinder; the second lifting assembly is a plurality of second hydraulic cylinders, the bottom of the second hydraulic cylinder is fixedly connected to the bottom plate, and the top of the second hydraulic cylinder is fixedly connected to the lower half of the cylinder.

[0014] Preferably, a first collecting box and a second collecting box are further provided on the bottom plate, and the first collecting box and the second collecting box are arranged corresponding to the barrel.

[0015] Preferably, heating plates are provided in the upper half cylinder and the lower half cylinder.

[0016] The utility model discloses the following technical effects: when cleaning, the screw extruder in the utility model can control the upper half barrel and the lower half barrel to rise and fall, so as to directly clean the barrel and the extrusion screw without manual disassembly, making cleaning more convenient and quick, saving time and effort.

[0017] At the same time, the utility model can completely remove the residual materials that are charred and carbonized and adhered to the surface of the barrel and the extrusion screw through the columnar steel brush and the scraper, without any cleaning dead corners and high cleaning efficiency.

[0018] In addition, when the screw extruder in the utility model prepares different materials, it can be quickly cleaned after each extrusion. After cleaning, new materials can be added to the feed hopper. At the same time, there will be no impurities from the previous extrusion on the barrel and the extrusion screw, which greatly reduces the possibility of introducing impurities and is suitable for continuous production.

[0019] The utility model has the advantages of low material price, simple structure, convenient use and high working efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0021] Figure 1 It is a structural schematic diagram of the screw extruder of the utility model;

[0022] Figure 2 It is a structural schematic diagram of the cleaning component in the utility model;

[0023] Figure 3 This is a schematic diagram of the installation structure of the scraper in the utility model;

[0024] Figure 4 This is a schematic diagram of the installation structure of the columnar steel brush in the utility model;

[0025] Figure 5 This is a schematic diagram of the structure of the material barrel in the utility model when it is ready to be cleaned;

[0026] Among them: 1. barrel; 101, upper barrel; 102, lower barrel; 2. extrusion screw; 3. feed hopper; 4. inclined plate; 5. extrusion head; 6. drive device; 601, power motor; 602, transmission box; 7. side plate; 8. bottom plate; 9. top plate; 10. workbench; 11. first lifting assembly; 12. second lifting assembly; 13. cleaning assembly; 14. fixing bar; 15. sliding cavity; 16. slideway; 17. electric threaded rod; 18. The first rotating support; 19. The first rotating arm; 20. The first rotating motor; 21. The second rotating arm; 22. The second rotating motor; 23. The third rotating motor; 24. The tool changing seat; 25. The cylindrical steel brush; 26. The scraper; 27. The bearing seat; 28. The rotating disk; 29. ​​The limiting seat; 30. The clamping plate; 31. The pressure spring; 32. The control panel; 33. The first hydraulic cylinder; 34. The second hydraulic cylinder; 35. The first collecting box; 36. The second collecting box. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0029] Reference Figure 1-4 The utility model provides a screw extruder, a bottom plate 8, a top plate 9 is arranged parallel to the bottom plate 8, a side plate 7 is fixedly connected between the bottom plate 8 and the top plate 9, a barrel 1 is horizontally arranged between the bottom plate 8 and the top plate 9, an extrusion screw 2 is coaxially arranged in the barrel 1, the extrusion screw 2 is adapted to the barrel 1, an extrusion head 5 is detachably connected to the discharge end of the barrel 1, a driving device 6 for controlling the rotation of the extrusion screw 2 is arranged on one side of the feed end of the barrel 1, the driving device 6 is fixedly connected to the bottom plate 8, a cleaning component 13 is fixedly connected to the side plate 7, and the cleaning component 13 is arranged corresponding to the barrel 1;

[0030] The barrel 1 includes an upper barrel 101 and a lower barrel 102, the upper barrel 101 and the lower barrel 102 are detachably connected, the feeding end of the upper barrel 101 is connected to a feeding hopper 3, a first lifting assembly 11 is fixedly connected between the top plate 9 and the upper barrel 101, and a second lifting assembly 12 is fixedly connected between the bottom plate 8 and the lower barrel 102.

[0031] It can be understood that when the inside of the barrel 1 needs to be cleaned, the extrusion head 5 is first removed from the barrel 1, and then the first lifting component 11 controls the upper half of the barrel 101 to move upward, and the second lifting component 12 controls the lower half of the barrel 102 to move downward, and the extrusion screw 2 is exposed to the outside. After the upper half of the barrel 101 and the lower half of the barrel 102 reach the cleaning position, the cleaning component 13 starts to work and cleans the upper half of the barrel 101, the extrusion screw 2, and the lower half of the barrel 102 from top to bottom.

[0032] The barrel 1 and the extrusion head 5 are detachably connected. When cleaning is required, the extrusion head 5 only needs to be removed from the barrel 1, and the extrusion head 5 and the barrel 1 can be reinstalled after cleaning.

[0033] Specifically, the barrel 1 extends into the inner wall of the extrusion head 5, the extrusion head 5 and the barrel 1 are threadedly connected, and a sealing baffle is provided in the extrusion head 5. When the extrusion head 5 and the barrel 1 are tightened and fixed, the sealing baffle also clings to the inner wall of the barrel 1, thereby completing the sealing of the threaded connection between the extrusion head 5 and the barrel 1.

[0034] It can be understood that after cleaning is completed, the first lifting assembly 11 controls the upper cylinder 101 to move downward, and the second lifting assembly 12 controls the lower cylinder 102 to move upward until the upper cylinder 101 and the lower cylinder 102 are tightly fitted, at which time the two are reset.

[0035] A sealing gasket is provided between the upper half cylinder 101 and the lower half cylinder 102 , and fasteners are provided on the outer surfaces of the upper half cylinder 101 and the lower half cylinder 102 .

[0036] Specifically, the sealing gasket is a ceramic fiber sealing gasket, which is resistant to high temperature, tearing and has high sealing performance, and the fastener is a fastening bolt; when the first lifting component 11 and the second lifting component 12 respectively press the upper cylinder 101 and the lower cylinder 102, the ceramic fiber sealing gasket is also pressed accordingly, thereby sealing the upper cylinder 101 and the lower cylinder 102. At this time, the fastening bolt is tightened to further press the upper cylinder 101 and the lower cylinder 102, so that the upper cylinder 101 and the lower cylinder 102 are always tightly fitted.

[0037] In a specific embodiment, the cleaning component 13 includes a fixed bar 14 fixedly connected to the side panel 7, the fixed bar 14 is horizontally arranged, and a slide groove 16 is horizontally opened on the fixed bar 14, and a first rotating support 18 is arranged on the fixed bar 14, and the first rotating support 18 is slidably connected to the fixed bar 14 through the slide groove 16, and a control component for controlling the sliding of the first rotating support 18 is installed in the fixed bar 14; a first rotating arm 19 is rotatably connected to the first rotating support 18, and a first rotating motor 20 for controlling the rotation of the first rotating arm 19 is fixedly connected to the first rotating support 18, and the end of the first rotating arm 19 away from the first rotating support 18 is rotatably connected to the second rotating arm 21, and a second rotating motor 22 for controlling the rotation of the second rotating arm 21 is installed on the first rotating arm 19, and the end of the second rotating arm 21 away from the first rotating arm 19 is rotatably connected to the cleaning head, and a third rotating motor 23 for controlling the rotation of the cleaning head is installed on the second rotating arm 21.

[0038] It can be understood that when cleaning is needed, the first rotary motor 20, the second rotary motor 22, and the third rotary motor 23 respectively drive the first rotary arm 19, the second rotary arm 21, and the cleaning head to rotate, so that the cleaning head is attached to the surface of the extrusion screw 2 or the inner walls of the upper half cylinder 101 and the lower half cylinder 102, and then the cleaning head cleans the fitting part. At the same time, the control component controls the first rotary support 18 to slide horizontally, and the cleaning head also slides therewith, and thoroughly cleans the surface of the extrusion screw 2 or the inner walls of the upper half cylinder 101 and the lower half cylinder 102.

[0039] Specifically, the control component is an electric threaded rod 17, a sliding cavity 15 is opened in the fixed bar 14, the electric threaded rod 17 is rotatably set in the sliding cavity 15, a sliding block is slidably connected in the sliding cavity 15, the electric threaded rod 17 passes through the sliding block and is threadedly connected to the sliding block, a connecting plate is provided on the sliding block, the connecting plate is located in the sliding groove 16 and is slidably connected to the inner wall of the sliding groove 16, the connecting plate is fixedly connected to the first rotating support 18 away from the sliding block, the side of the first rotating support 18 is slidably connected to the side of the fixed bar 14, when the electric threaded rod 17 rotates, the sliding block slides in the sliding cavity 15, thereby driving the first rotating support 18 to slide horizontally.

[0040] When the cleaning head cleans the surface of the extrusion screw 2, the extrusion screw 2 is also rotating, and after the extrusion screw 2 rotates one circle, the sliding distance of the cleaning head is equal to the distance between two adjacent thread leaves on the extrusion screw 2, that is, the cleaning head thoroughly cleans the extrusion screw 2 along the thread leaves of the extrusion screw 2.

[0041] In a specific embodiment, the cleaning head includes a cylindrical steel brush 25, a scraper 26 and a tool changing seat 24. The second rotating arm 21 is rotatably connected to a supporting seat 27, and a rotating disk 28 is rotatably connected to the supporting seat 27. A limiting seat 29 is fixedly connected to the center of the rotating disk 28. A receiving groove is opened in the limiting seat 29, and a clamping plate 30 is slidably connected in the receiving groove. A pressure spring 31 is fixedly connected between the clamping plate 30 and the bottom wall of the receiving groove. The tool changing seat 24 passes through the limiting seat 29 and is fixedly connected to the clamping plate 30. The tool changing seat 24 is used to install the cylindrical steel brush 25 and the scraper 26.

[0042] It can be understood that a disassembly and assembly component is provided on the tool change seat 24, and the cylindrical steel brush 25 and the scraper 26 are both compatible with the disassembly and assembly component. When the upper half cylinder 101 and the lower half cylinder 102 need to be cleaned, it is only necessary to install the scraper 26 on the tool change seat 24, and then by rotating the first rotating arm 19, the second rotating arm 21 and the cleaning head, the scraper 26 abuts against the inner walls of the upper half cylinder 101 and the lower half cylinder 102, and the upper half cylinder 101 and the lower half cylinder 102 can be cleaned; when the extrusion screw 2 needs to be cleaned, it is only necessary to remove the scraper 26 and install the cylindrical steel brush 25, and then by rotating the first rotating arm 19, the second rotating arm 21 and the cleaning head, the cylindrical steel brush 25 is in a horizontal state and abuts against the surface of the extrusion screw 2, and the extrusion screw 2 can be cleaned. At this time, the top surface of the cylindrical steel brush 25 cleans the surface of the middle rod of the extrusion screw 2, and the side surface of the cylindrical steel brush 25 cleans the surface of the threaded blades of the extrusion screw 2.

[0043] Specifically, the disassembly assembly is a bolt head, and the bottoms of the columnar steel brush 25 and the scraper 26 are provided with threaded holes adapted to the bolt heads, that is, the columnar steel brush 25 and the scraper 26 are all threadedly connected to the tool changer seat 24 .

[0044] It can be understood that when the scraper 26 is used for cleaning, the rotating disk 28 remains stationary, and the scraper 26 directly cleans the residual material on the inner walls of the upper half cylinder 101 and the lower half cylinder 102. When the cylindrical steel brush 25 is used for cleaning, the rotating disk 28 starts to rotate and drives the cylindrical steel brush 25 to rotate, and the residual material on the surface of the extrusion screw 2 is cleaned by friction.

[0045] Specifically, a rotating motor is fixed in the bearing seat 27, and the output shaft of the rotating motor is fixedly connected to the center of the commutation disk 28, and the commutation disk 28 is driven by the rotating motor to rotate, wherein the rotation direction of the commutation disk 28 is the same as the rotation direction of the threaded hole at the bottom of the columnar steel brush 25, that is, when the commutation disk 28 rotates at a high speed, the columnar steel brush 25 and the tool changing seat 24 will not loosen, but will become tighter and tighter.

[0046] It can be understood that when there is too much residual material or severe burnt material on the surface to be cleaned of the extrusion screw 2 or the upper half cylinder 101 or the lower half cylinder 102, the first rotating arm 19, the second rotating arm 21 and the cleaning head can be adjusted to increase the extrusion force of the columnar steel brush 25 and the scraper 26 on the surface to be cleaned, the pressure spring 31 continues to be compressed, and the friction between the columnar steel brush 25, the scraper 26 and the surface to be cleaned increases, making it easier to scrape off the residual material, thereby improving the cleaning force.

[0047] In a specific embodiment, a plurality of inclined plates 4 are disposed in the feed hopper 3 , and the plurality of inclined plates 4 are staggered and fixed to the side wall of the feed hopper 3 .

[0048] It can be understood that when the material is added into the feed hopper 3, the material particles will gradually increase in speed during the falling process, and the material particles that first reach the inclined plate 4 will collide with the inclined plate 4 and mix with the material particles that reach the inclined plate 4 later, and several inclined plates 4 are staggered to make the mixing more uniform.

[0049] In a specific embodiment, the driving device 6 includes a power motor 601 and a transmission box 602 , a workbench 10 is fixedly connected to the base plate 8 , and the power motor 601 and the transmission box 602 are fixedly installed on the workbench 10 .

[0050] It can be understood that the output shaft of the power motor 601 is fixedly connected to the input shaft of the transmission box 602 , and the output shaft of the transmission box 602 is fixedly connected to the extrusion screw 2 , and the power motor 601 drives the extrusion screw 2 to rotate.

[0051] In a specific embodiment, the first lifting assembly 11 is a plurality of first hydraulic cylinders 33, the top of the first hydraulic cylinder 33 is fixedly connected to the top plate 9, and the bottom of the first hydraulic cylinder 33 is fixedly connected to the upper half cylinder 101; the second lifting assembly 12 is a plurality of second hydraulic cylinders 34, the bottom of the second hydraulic cylinder 34 is fixedly connected to the bottom plate 8, and the top of the second hydraulic cylinder 34 is fixedly connected to the lower half cylinder 102.

[0052] Specifically, the number of the first hydraulic cylinder 33 and the number of the second hydraulic cylinder 34 are both two.

[0053] In a specific embodiment, a first collecting box 35 and a second collecting box 36 are further provided on the bottom plate 8 . The first collecting box 35 and the second collecting box 36 are provided corresponding to the barrel 1 and are used to collect the residual material cleaned by the cleaning assembly 13 .

[0054] In a specific embodiment, heating plates are disposed in the upper half cylinder 101 and the lower half cylinder 102 for heating and melting the mixed material.

[0055] In addition, a control panel 32 is also installed on the workbench 10, and the control panel 32 is electrically connected to the power motor 601, the first lifting component 11, the second lifting component 12, the electric threaded rod 17, the first rotating motor 20, the second rotating motor 22, the third rotating motor 23, the rotating motor and the heating plate, that is, the coordinated operation of the power motor 601, the first lifting component 11, the second lifting component 12, the electric threaded rod 17, the first rotating motor 20, the second rotating motor 22, the third rotating motor 23, the rotating motor and the heating plate is controlled by the control panel 32.

[0056] The working process of this utility model:

[0057] Before adding materials, the heating plate must be turned on to preheat the barrel 1. After the preheating is completed, the materials are added to the feed hopper 3. The inclined plate 4 in the feed hopper 3 preliminarily mixes the materials, and then the materials enter the barrel 1. At this time, the power motor 601 starts to work and drives the extrusion screw 2 to rotate. The materials are fully plasticized and evenly mixed in the barrel 1, and then extruded from the extrusion head 5. After the extrusion is completed, the staff removes the extrusion head 5 and loosens the fasteners. Then the upper half of the barrel 101 rises and the lower half of the barrel 102 descends. When both the upper half of the barrel 101 and the lower half of the barrel 102 reach the position to be cleaned, After placement, the staff installs the scraper 26 on the tool changer 24, and then controls the first rotating arm 19, the second rotating arm 21, and the cleaning head to rotate toward the side close to the upper cylinder 101, so that the scraper 26 is close to the inner wall of the upper cylinder 101, and the electric threaded rod 17 starts to work at the same time, and the scraper 26 slides horizontally and cleans the inner wall of the upper cylinder 101. When the scraper 26 slides to the end of the upper cylinder 101, the electric threaded rod 17 rotates in the opposite direction, and the scraper 26 then slides in the opposite direction to clean the inner wall of the upper cylinder 101 again, and so on and so forth until the inner wall of the upper cylinder 101 is cleaned.

[0058] Similarly, when the upper half cylinder 101 is cleaned, the staff removes the scraper 26 and installs the cylindrical steel brush 25, and then controls the cylindrical steel brush 25 to make it close to the surface of the extrusion screw 2. At this time, the cylindrical steel brush 25 begins to rotate and slides horizontally under the push of the electric threaded rod 17. At the same time, the extrusion screw 2 begins to rotate, so that the cylindrical steel brush 25 cleans along the threaded leaves on the extrusion screw 2 until the surface of the extrusion screw 2 is cleaned; when the extrusion screw 2 is cleaned, the staff replaces the scraper 26 and makes it close to the inner wall of the lower half cylinder 102, and then repeats the above process until the inner wall of the lower half cylinder 102 is cleaned.

[0059] Under the action of gravity, the residual materials cleaned by the cleaning head will automatically fall into the first collection box 35 and the second collection box 36 below, and will be taken away and processed by the staff after the cleaning work is completed.

[0060] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0061] The embodiments described above are only descriptions of the preferred methods of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should fall within the protection scope determined by the claims of the present invention.

Claims

1. A screw extruder, characterized in that: The invention comprises a bottom plate (8), a top plate (9) is arranged parallel to the bottom plate (8), a side plate (7) is fixedly connected between the bottom plate (8) and the top plate (9), a barrel (1) is arranged horizontally between the bottom plate (8) and the top plate (9), an extrusion screw (2) is arranged coaxially in the barrel (1), the extrusion screw (2) is adapted to the barrel (1), an extrusion head (5) is detachably connected to the discharge end of the barrel (1), a driving device (6) for controlling the rotation of the extrusion screw (2) is arranged on one side of the feed end of the barrel (1), the driving device (6) is fixedly connected to the bottom plate (8), a cleaning component (13) is fixedly connected to the side plate (7), and the cleaning component (13) is arranged corresponding to the barrel (1); The barrel (1) comprises an upper barrel (101) and a lower barrel (102), wherein the upper barrel (101) and the lower barrel (102) are detachably connected, a feeding end of the upper barrel (101) is connected to a feeding hopper (3), a first lifting assembly (11) is fixedly connected between the top plate (9) and the upper barrel (101), and a second lifting assembly (12) is fixedly connected between the bottom plate (8) and the lower barrel (102).

2. A screw extruder according to claim 1, characterized in that: The cleaning component (13) comprises a fixing bar (14) fixedly connected to the side plate (7); the fixing bar (14) is arranged horizontally; a slide groove (16) is horizontally provided on the fixing bar (14); a first rotating support (18) is arranged on the fixing bar (14); the first rotating support (18) is slidably connected to the fixing bar (14) through the slide groove (16); a control component for controlling the sliding of the first rotating support (18) is installed in the fixing bar (14); a first rotating arm (19) is rotatably connected to the first rotating support (18); the first rotating arm (19) is rotatably connected to the first rotating support (18); A first rotating motor (20) for controlling the rotation of the first rotating arm (19) is fixedly connected to the rotating support (18); an end of the first rotating arm (19) away from the first rotating support (18) is rotatably connected to a second rotating arm (21); a second rotating motor (22) for controlling the rotation of the second rotating arm (21) is mounted on the first rotating arm (19); an end of the second rotating arm (21) away from the first rotating arm (19) is rotatably connected to a cleaning head; a third rotating motor (23) for controlling the rotation of the cleaning head is mounted on the second rotating arm (21).

3. A screw extruder according to claim 2, characterized in that: The cleaning head comprises a columnar steel brush (25), a scraper (26) and a tool changer seat (24); the second rotating arm (21) is rotatably connected to a bearing seat (27); a rotating disk (28) is rotatably connected to the bearing seat (27); a limiting seat (29) is fixedly connected to the center of the rotating disk (28); a receiving groove is provided in the limiting seat (29); a clamping plate (30) is slidably connected in the receiving groove; a pressure spring (31) is fixedly connected between the clamping plate (30) and the bottom wall of the receiving groove; the tool changer seat (24) passes through the limiting seat (29) and is fixedly connected to the clamping plate (30); the tool changer seat (24) is used for mounting the columnar steel brush (25) and the scraper (26).

4. A screw extruder according to claim 1, characterized in that: A plurality of inclined plates (4) are arranged in the feed hopper (3), and the plurality of inclined plates (4) are staggered and fixed on the side wall of the feed hopper (3).

5. A screw extruder according to claim 1, characterized in that: The driving device (6) comprises a power motor (601) and a transmission box (602); a workbench (10) is fixedly connected to the base plate (8); and the power motor (601) and the transmission box (602) are fixedly mounted on the workbench (10).

6. A screw extruder according to claim 1, characterized in that: The first lifting assembly (11) is composed of a plurality of first hydraulic cylinders (33), the top of each of the first hydraulic cylinders (33) being fixedly connected to the top plate (9), and the bottom of each of the first hydraulic cylinders (33) being fixedly connected to the upper half cylinder (101); the second lifting assembly (12) is composed of a plurality of second hydraulic cylinders (34), the bottom of each of the second hydraulic cylinders (34) being fixedly connected to the bottom plate (8), and the top of each of the second hydraulic cylinders (34) being fixedly connected to the lower half cylinder (102).

7. A screw extruder according to claim 1, characterized in that: A first collecting box (35) and a second collecting box (36) are also provided on the bottom plate (8), and the first collecting box (35) and the second collecting box (36) are arranged corresponding to the barrel (1).

8. A screw extruder according to claim 1, characterized in that: Heating plates are arranged in the upper half cylinder (101) and the lower half cylinder (102).

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