Rock wool finishing device for rock wool production and use method

Abstract

The invention relates to a rock wool finishing device for rock wool production and a using method. The rock wool finishing device comprises a lower extrusion assembly, an upper extrusion assembly, a hydraulic cylinder and two sets of same lifting moving assemblies. Before or in the extrusion process of filamentous rock wool, the arranged hydraulic cylinder can drive the upper extrusion assembly to ascend and descend, so that a gap between an upper finishing roller in the upper extrusion assembly and a lower finishing roller in the lower extrusion assembly is adjusted, and the gap can be kept fixed; therefore, filamentous rock wool can be extruded into solid rock wool with the corresponding thickness, and the thickness of the extruded solid rock wool is consistent, so that the flexibility of the device is improved. And through the arrangement of the two lifting moving assemblies, the height of the lower extrusion assembly can be adjusted in real time, so that it is guaranteed that the gap between the upper finishing roller and the lower finishing roller is consistent with the height of the conveyed filamentous rock wool, pulling of the filamentous rock wool is reduced, and the problem that the filamentous rock wool is broken is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of rock wool production, and in particular to a rock wool finishing device for rock wool production and a use method thereof. Background Art

[0002] The statements herein merely provide background information related to the present invention and do not necessarily constitute prior art.

[0003] Rock wool is an inorganic fiber made by high-temperature melting and fiberization. Because of its excellent thermal insulation and fire prevention functions, it is widely used in thermal insulation of buildings, industrial equipment, pipelines, containers and various kilns.

[0004] In the production process of rock wool, the raw materials, mainly high-quality basalt and dolomite, need to be melted at a high temperature of more than 1450℃, and then centrifuged into fibers at high speed using a four-axis centrifuge to obtain scattered filamentary rock wool; then a certain amount of binder, dust-proof oil and water-repellent agent are sprayed into the filamentary rock wool, and the scattered filamentary rock wool is sorted by a sorting device to obtain solid rock wool with a certain shape and thickness, providing the necessary conditions for subsequent rock wool production. However, the existing sorting devices still have many problems or defects when used.

[0005] Taking the invention patent with application number: 202210767216.5 and title: A rock wool finishing device for rock wool production as an example, the filamentous rock wool is squeezed by a rotating shaft and a squeezing rod, and the squeezing rod can move up and down through a connecting rod, a top plate, a cross plate and a first spring, thereby adjusting the distance between the rotating shaft and the squeezing rod. However, the above finishing device still has the following shortcomings:

[0006] 1. The distance between the rotating shaft and the extrusion rod is determined by the amount of filamentous rock wool being transported. During the transportation process, the scattered filamentous rock wool is not transported evenly, resulting in different thicknesses of the solid rock wool after extrusion. At the same time, the thickness of the rock wool cannot be accurately controlled, making the device inflexible.

[0007] Second, the height of the rotating shaft is fixed, which means that only the filamentary rock wool of a specific height can be squeezed; when the height of the rotating shaft is inconsistent with the height of the equipment for conveying the filamentary rock wool, the filamentary rock wool will be in a tilted state during the transportation process, which increases the pulling on the filamentary rock wool and causes the filamentary rock wool to break. Summary of the invention

[0008] The technical problem to be solved by the present invention is to provide a rock wool finishing device for rock wool production and a method of use. The upper extrusion assembly is driven to rise and fall by a hydraulic cylinder, so as to adjust the gap between the upper extrusion assembly and the lower extrusion assembly before or during extrusion, thereby ensuring the consistency of the thickness of the rock wool after extrusion, and at the same time being able to accurately control the thickness of the rock wool after extrusion; and by using two sets of lifting and moving assemblies, the height of the lower extrusion assembly can be adjusted, thereby ensuring the smooth transportation of the filamentary rock wool, reducing the pulling on the filamentary rock wool, avoiding the problem of breakage of the filamentary rock wool, and increasing the flexibility of the device.

[0009] The object of the present invention is to provide a rock wool finishing device for rock wool production, comprising a lower extrusion assembly, an upper extrusion assembly, two mounting blocks, a connecting block, a vertical plate, a top plate, a hydraulic cylinder and two groups of identical lifting and moving assemblies; two mounting blocks are symmetrically arranged on the left and right sides of the lower extrusion assembly, and the two mounting blocks are each provided with a connecting block, the connecting block is fixedly connected to the bottom end of the vertical plate, the top end of the vertical plate is fixedly connected to the lower surface of the top plate, the hydraulic cylinder is arranged on the upper surface of the top plate, and is fixedly connected to the upper extrusion assembly through the top plate, and the upper extrusion assembly and the lower extrusion assembly are used together to extrude the rock wool; the two groups of identical lifting and moving assemblies are respectively installed at the bottom ends of the two mounting blocks, and the two groups of identical lifting and moving assemblies are used together to adjust the height of the lower extrusion assembly.

[0010] As a further technical solution, the lower extrusion knot assembly includes a mounting frame, a finishing roller and a driving mechanism, the two mounting blocks are fixedly connected to the outer side surface of the mounting frame; the finishing roller is arranged inside the mounting frame, and the driving mechanism is arranged on the outside of a single side surface of the mounting frame, and the driving mechanism is fixedly connected to the finishing roller through the side surface of the mounting frame.

[0011] As a further technical solution, the upper extrusion assembly has the same structure as the lower extrusion assembly; the upper extrusion assembly and the lower extrusion assembly are symmetrical in vertical direction.

[0012] As a further technical solution, the rock wool finishing device also includes a limiting rod, the bottom end of which is fixedly connected to the upper extrusion knot assembly, and the top end of which passes through the top plate and extends above the top plate.

[0013] As a further technical solution, the lifting and moving assembly includes a box body, a forward and reverse motor, a cross bar and a bidirectional screw. The cross bar is arranged at the top of the box body, and the bidirectional screw is arranged inside the box body parallel to the cross bar and is located below the cross bar; the forward and reverse motor is arranged on the outer surface of the side of the box body, and one end of the bidirectional screw is fixedly connected to the forward and reverse motor through the side of the box body.

[0014] As a further technical solution, the lifting and moving assembly also includes two moving blocks and two first hinged blocks. The two moving blocks are symmetrically nested on the bidirectional screw and are both nested and connected to the cross bar; the two first hinged blocks are respectively installed at the bottom ends of the two moving blocks.

[0015] As a further technical solution, the lifting and moving assembly also includes two connecting rods, two second hinge blocks and a transmission plate. The transmission plate is arranged inside the box body parallel to the bidirectional screw and is located below the bidirectional screw; the two second hinge blocks are respectively installed at the two ends of the upper surface of the transmission plate, and the two ends of a single connecting rod among the two connecting rods are respectively connected to the first hinge block and the second hinge block located on the same side.

[0016] As a further technical solution, grooves are provided on both sides of the inner surface of the box body, and the two ends of the transmission plate are respectively located in the two grooves.

[0017] As a further technical solution, the lifting and moving assembly also includes a transmission rod, a base plate and a moving wheel. The transmission rod is vertically arranged inside the box body, and the base plate is located below the box body; the top end of the transmission rod is fixedly connected to the lower surface of the transmission plate, and the bottom end of the transmission rod is fixedly connected to the upper surface of the base plate; the moving wheel is arranged at the bottom of the base plate.

[0018] A method for using a rock wool finishing device for rock wool production, comprising:

[0019] The upper extrusion assembly is driven to rise and fall by a hydraulic cylinder to adjust the gap between the finishing roller in the upper extrusion assembly and the finishing roller in the lower extrusion assembly to extrude the rock wool;

[0020] The forward and reverse rotation of the forward and reverse motor is used to control the lifting and lowering of the box body, thereby adjusting the height of the upper extrusion component and the lower extrusion component.

[0021] Beneficial effects of one or more of the above technical solutions:

[0022] (1) The present invention drives the upper extrusion assembly to rise and fall by means of a hydraulic cylinder, thereby adjusting the gap between the upper finishing roller in the upper extrusion assembly and the lower finishing roller in the lower extrusion assembly, and being able to keep the gap fixed, so that the filamentary rock wool can be squeezed into solid rock wool of corresponding thickness, and the thickness of the solid rock wool after extrusion is consistent. At the same time, during the extrusion process, the hydraulic cylinder can also be used to adjust the gap between the upper finishing roller and the lower finishing roller, so as to obtain solid rock wool of different thicknesses in real time, thereby improving the flexibility of the device.

[0023] (2) The present invention can adjust the height of the lower extrusion assembly in real time by setting up two sets of lifting and moving assemblies, thereby ensuring that the gap between the upper finishing roller and the lower finishing roller is consistent with the height of the conveyed filamentary rock wool, thereby reducing the pulling on the filamentary rock wool and avoiding the problem of filamentary rock wool breaking. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings in the specification that constitute a part of this application are used to provide further understanding of the present application. In order to facilitate understanding, the proportions between the structures of each part are adjusted. The schematic embodiments of the present application and their descriptions are used to explain the present application and do not constitute a limitation on the present application.

[0025] Figure 1 This is a front structural diagram of a rock wool finishing device used for rock wool production according to the present invention.

[0026] Figure 2 This is a rear structural diagram of a rock wool finishing device used for rock wool production according to the present invention.

[0027] Figure 3 This is a top view of the structure of a rock wool finishing device used for rock wool production according to the present invention.

[0028] Figure 4 The present invention is a side structural diagram of a rock wool finishing device used for rock wool production.

[0029] Figure 5 for Figure 4 Schematic diagram of the local enlarged structure at point A in the middle.

[0030] Among them, 1. top plate, 2. vertical plate, 3. mounting block, 4. connecting block, 5. hydraulic cylinder, 6. lower mounting frame, 7. lower finishing roller, 8. first driving mechanism, 9. upper mounting frame, 10. upper finishing roller, 11. second driving mechanism, 12. limit rod, 13. box body, 14. forward and reverse motor, 15. cross bar, 16. bidirectional screw, 17. moving block, 18. first hinge block, 19. connecting rod, 20. second hinge block, 21. transmission plate, 22. groove, 23. transmission rod, 24. bottom plate, 25. moving wheel. DETAILED DESCRIPTION

[0031] The following is combined with Figure 1-5 , clearly and completely describe the technical solutions in the embodiments of the present invention.

[0032] Embodiment 1

[0033] Reference Figure 1-4 A rock wool finishing device for rock wool production includes a lower extrusion assembly, an upper extrusion assembly, two mounting blocks 3, a connecting block 4, a vertical plate 2, a top plate 1, a hydraulic cylinder 5, a limit rod 12 and two sets of identical lifting and moving assemblies.

[0034] Reference Figure 1-2 In this embodiment, the structural composition and internal connection method of the upper extrusion assembly and the lower extrusion assembly are exactly the same, and both include a mounting frame, a finishing roller and a driving mechanism; and for the convenience of understanding and clear description, the following definitions are made: the lower extrusion assembly includes a lower mounting frame 6, a lower finishing roller 7 and a first driving mechanism 8, and the upper extrusion structure includes an upper mounting frame 9, an upper finishing roller 10 and a second driving mechanism 11.

[0035] Specifically, the lower finishing roller 7 is nested inside the lower mounting frame 6, and the first driving mechanism 8 is arranged on the outside of a single side surface of the lower mounting frame 6, and the first driving mechanism 8 is fixedly connected to the lower finishing roller 7 through the side surface of the lower mounting frame 6; and the first driving mechanism 8 can drive the lower finishing roller 7 to rotate.

[0036] Among them, the first driving mechanism 8 includes a driving motor, a driving wheel, a driven wheel and a conveyor belt, wherein the driving motor drives the driving wheel to rotate, and the driving wheel is matched with multiple driven wheels through a conveyor belt, so that the driving motor can drive the driving wheel and the driven wheels to rotate together; at the same time, each driven wheel is fixedly connected to a single lower finishing roller 7 through the output shaft and through the side of the lower mounting frame 6, so that each driven wheel can drive a lower finishing roller 7 to rotate together.

[0037] Specifically, the number of driven wheels is the same as the number of lower finishing rollers 7, so that the first driving mechanism 8 can drive all lower finishing rollers 7 in the lower extrusion assembly to rotate. The upper extrusion structure assembly is arranged above the lower extrusion assembly, and the two are in a vertically symmetrical state.

[0038] Reference Figure 1-4 In the lower extrusion assembly, two mounting blocks 3 are symmetrically arranged on the outer side surfaces of the left and right sides of the lower mounting frame 6 and fixed by welding or the like; at the same time, the two mounting blocks 3 and the first driving mechanism 8 are located on the outer side surfaces of three different sides of the lower mounting frame 6.

[0039] In this embodiment, two opposite sides of each mounting block 3 are fixedly connected with connecting blocks 4, and the upper end of each connecting block 4 is fixedly connected to the bottom end of the vertical plate 2, and the top end of each vertical plate 2 is fixedly connected to the lower surface of the top plate 1. Therefore, in this embodiment, the number of connecting blocks 4 and vertical plates 2 is 4; and the installation position and connection method of the connecting block 4 on the mounting block 3 can be adaptively adjusted, which is not required here.

[0040] The two mounting blocks 3 are provided to fix the lower extrusion assembly, and the four connecting blocks 4 and the four vertical plates 2 are used to achieve a firm connection between the top plate 1 and the mounting blocks 3, thereby ensuring the stability of the entire device.

[0041] Reference Figure 1-4 A hydraulic cylinder 5 is arranged on the upper surface of the top plate 1, and the output end of the hydraulic cylinder 5 passes through the top plate 1 and is fixedly connected to the bottom surface of the upper mounting frame 9, so that the upper extrusion assembly and the lower extrusion assembly are symmetrical in the vertical direction. Through the above arrangement, the upper finishing roller 10 in the upper extrusion assembly and the lower finishing roller 7 in the lower extrusion assembly are in a relative state, and a certain gap can be formed between the two, so as to allow the filamentary rock wool to pass through and realize the extrusion of the filamentary rock wool, and finally form a solid rock wool with a certain shape and thickness.

[0042] At the same time, the upper bottom surface of the upper mounting frame 9 is fixedly connected to the bottom end of the limiting rod 12, and the top end of the limiting rod 12 passes through the top plate 1 and extends above the top plate 1. The limiting rod 12 can limit the lifting range of the upper extrusion assembly and ensure that there is no collision between the upper extrusion assembly and the lower extrusion assembly.

[0043] During use of the above device, the hydraulic cylinder 5 can drive the upper extrusion assembly to move up and down, so as to adjust the gap between the upper finishing roller 10 in the upper extrusion assembly and the lower finishing roller 7 in the lower extrusion assembly. At the same time, the hydraulic cylinder 5 can fix the gap between the upper finishing roller 10 and the lower finishing roller 7 at a stable value, so as to ensure that solid rock wool with consistent thickness is obtained after extrusion, thereby avoiding the occurrence of solid rock wool with different thicknesses due to uneven distribution of the input filamentary rock wool. In addition, in the process of extruding the filamentary rock wool, when it is necessary to obtain solid rock wool of other thicknesses, the hydraulic cylinder 5 can also be used to adjust the gap between the upper finishing roller 10 and the lower finishing roller 7, so as to extrude solid rock wool of corresponding thickness, thereby extruding solid rock wool of different thicknesses in real time to meet the needs of solid rock wool of different thicknesses and improve the flexibility of the entire device.

[0044] In order to ensure the stable operation of the upper extrusion assembly and the stability during operation, the number of the hydraulic cylinders 5 in this embodiment is 2 and the number of the limiting rods 12 is 4.

[0045] Reference Figure 1-5 , two sets of identical lifting and moving components are respectively installed at the bottom ends of the two mounting blocks 3. For a clearer understanding, a single set of lifting and moving components is described.

[0046] Specifically, the lifting and moving assembly includes a box body 13 , a forward and reverse motor 14 , a cross bar 15 and a bidirectional screw 16 .

[0047] In this embodiment, the box body 13 is a rectangular parallelepiped structure with a hollow interior and no bottom surface. Figure 4-5The cross bar 15 is arranged at the top of the box body 13 and is fixedly connected to the inner surface of the box body 13; the bidirectional screw 16 is arranged inside the box body 13 parallel to the cross bar 15 and is located below the cross bar 15. The forward and reverse motor 14 is arranged on the outer surface of the side of the box body 13, and one end of the bidirectional screw 16 is fixedly connected to the forward and reverse motor 14 through the side of the box body 13.

[0048] Among them, the bidirectional screw 16 is a threaded guide rod with opposite threads on both sides of the midpoint with the center of the screw as the midpoint; one end of the bidirectional thread 16 is fixedly connected to the forward and reverse motor 14 through the side of the box body 13, and the other end is nested on the inner side of the box body 13, thereby ensuring that the forward and reverse motor 14 can drive the rotation of the bidirectional screw 16.

[0049] The lifting and moving assembly further includes two moving blocks 17 , two first hinge blocks 18 , two connecting rods 19 , two second hinge blocks 20 and a transmission plate 21 .

[0050] Among them, the two moving blocks 17 are symmetrically nested on the bidirectional screw 16, and are both nested and connected with the cross bar 15, that is, the two moving blocks 17 are respectively nested at the positions of different threads on the bidirectional screw 16; and through the nested connection with the cross bar 15, not only can the two moving blocks 17 be fixed, but also the stability of the two moving blocks 17 when moving on the bidirectional screw 16 can be guaranteed.

[0051] The two first hinge blocks 18 are respectively mounted at the bottom ends of the two moving blocks 17; grooves 22 are provided on both sides of the inner surface of the box body 13, and the two ends of the transmission plate 21 are respectively located in the two grooves 22, and the transmission plate 21 is arranged inside the box body 13 parallel to the bidirectional screw 16 and is located below the bidirectional screw 16. The two second hinge blocks 20 are respectively mounted at the two ends of the upper surface of the transmission plate 21, and the two ends of a single connecting rod 19 of the two connecting rods 19 are respectively connected to the first hinge block 18 and the second hinge block 20 located on the same side.

[0052] In addition, the lifting and moving assembly further includes a transmission rod 23 , a bottom plate 24 and moving wheels 25 .

[0053] Specifically, the transmission rod 23 is vertically arranged inside the box body 13, and the bottom plate 24 is located below the box body 13; wherein the top end of the transmission rod 23 is fixedly connected to the lower surface of the transmission plate 21, and the bottom end of the transmission rod 23 is fixedly connected to the upper surface of the bottom plate 24. Meanwhile, the moving wheel 25 is arranged at the bottom of the bottom plate 24.

[0054] The number of transmission rods 23 and moving wheels 25 can be adjusted adaptively; in this embodiment, in order to ensure that the lifting and moving assembly has sufficient supporting capacity, the number of transmission rods 23 in a single lifting and moving assembly is 3; and in order to ensure that the entire device can move, the number of moving wheels 25 in a single lifting and moving assembly is 2, and they are symmetrically arranged on both sides of the bottom surface of the bottom plate 24. At the same time, the two grooves 22 not only provide space for the transmission plate 21 to move up and down, but also limit and fix the transmission plate 21, thereby ensuring the safety of the transmission plate 21 during the up and down movement, and avoiding the risk of the transmission plate 21 falling off from the box body 13.

[0055] During use of the above device, when the forward and reverse motors 14 rotate forward, the two moving blocks 17 move back to back on the bidirectional screw 16, and through the connection and force transmission of the first hinge block 18, the connecting rod 19, the second hinge block 20, the transmission plate 21, the transmission rod 23 and the bottom plate 24, the connecting rod 19 will continuously increase the supporting force on the moving block 17, so that the box body 13 continues to move upward, thereby raising the height of the lower extrusion assembly, so that the gap between the upper finishing drum 10 and the lower finishing roller 7 reaches the same height as the conveyed filamentous rock wool, thereby ensuring that the filamentous rock wool is kept in a horizontal state as much as possible, thereby reducing the pulling on the filamentous rock wool and avoiding the problem of filamentous rock wool breaking.

[0056] When the forward and reverse motor 14 rotates in the opposite direction, the connecting rod 19 will continuously reduce the supporting force on the moving block 17, so that the box body 13 continues to move downward, thereby lowering the height of the lower extrusion assembly, and adjusting the height of the gap between the upper finishing roller 10 and the lower finishing roller 7, and aligning them again, so as to keep the filamentous rock wool in a horizontal state as much as possible, reducing the pulling force on the filamentous rock wool.

[0057] By using the above-mentioned device, the height of the gap between the upper finishing roller 10 and the lower finishing roller 7 can be adjusted in real time before or during the extrusion process of the filamentary rock wool, thereby improving the flexibility of the entire device and providing necessary guarantees for the subsequent production of rock wool.

[0058] Although the above describes the specific implementation mode of the present invention in conjunction with the accompanying drawings, it is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art on the basis of the technical solution of the present invention without creative work are still within the scope of protection of the present invention.

Claims

1. A rock wool finishing device for rock wool production, characterized in that: It includes a lower extrusion component, an upper extrusion component, two mounting blocks, a connecting block, a vertical plate, a top plate, a hydraulic cylinder and two groups of identical lifting and moving components; two mounting blocks are symmetrically arranged on the left and right sides of the lower extrusion component, and the two mounting blocks are each provided with a connecting block, the connecting block is fixedly connected to the bottom end of the vertical plate, the top end of the vertical plate is fixedly connected to the lower surface of the top plate, the hydraulic cylinder is arranged on the upper surface of the top plate, and is fixedly connected to the upper extrusion component through the top plate, and the upper extrusion component and the lower extrusion component are used together to extrude rock wool; the two groups of identical lifting and moving components are respectively installed at the bottom ends of the two mounting blocks, and the two groups of identical lifting and moving components are used together to adjust the height of the lower extrusion component.

2. A rock wool finishing device for rock wool production according to claim 1, characterized in that: The lower extrusion knot assembly includes a mounting frame, a finishing roller and a driving mechanism, wherein the two mounting blocks are fixedly connected to the outer side surface of the mounting frame; the finishing roller is arranged inside the mounting frame, and the driving mechanism is arranged outside a single side surface of the mounting frame, and the driving mechanism is fixedly connected to the finishing roller through the side surface of the mounting frame.

3. A rock wool finishing device for rock wool production according to claim 1, characterized in that: The upper extrusion assembly has the same structure as the lower extrusion assembly; the upper extrusion assembly and the lower extrusion assembly are symmetrical in vertical direction.

4. A rock wool finishing device for rock wool production according to claim 1, characterized in that: The rock wool finishing device also includes a limiting rod, the bottom end of which is fixedly connected to the upper extrusion knot assembly, and the top end of which passes through the top plate and extends above the top plate.

5. The rock wool finishing device for rock wool production according to claim 1, characterized in that: The lifting and moving assembly includes a box body, a forward and reverse motor, a cross bar and a bidirectional screw. The cross bar is arranged at the top end of the box body, and the bidirectional screw is arranged inside the box body parallel to the cross bar and is located below the cross bar; the forward and reverse motor is arranged on the outer surface of the side of the box body, and one end of the bidirectional screw is fixedly connected to the forward and reverse motor through the side of the box body.

6. A rock wool finishing device for rock wool production as claimed in claim 5, characterized in that: The lifting and moving assembly also includes two moving blocks and two first hinged blocks. The two moving blocks are symmetrically nested on the bidirectional screw rod and are both nested and connected with the cross bar; the two first hinged blocks are respectively installed at the bottom ends of the two moving blocks.

7. A rock wool finishing device for rock wool production according to claim 6, characterized in that: The lifting and moving assembly also includes two connecting rods, two second hinge blocks and a transmission plate. The transmission plate is arranged inside the box body parallel to the bidirectional screw and is located below the bidirectional screw; the two second hinge blocks are respectively installed at the two ends of the upper surface of the transmission plate, and the two ends of a single connecting rod among the two connecting rods are respectively connected to the first hinge block and the second hinge block located on the same side.

8. A rock wool finishing device for rock wool production according to claim 7, characterized in that: Grooves are provided on both sides of the inner surface of the box body, and the two ends of the transmission plate are respectively located in the two grooves.

9. A rock wool finishing device for rock wool production according to claim 7, characterized in that: The lifting and moving assembly also includes a transmission rod, a base plate and a moving wheel. The transmission rod is vertically arranged inside the box body, and the base plate is located below the box body; the top end of the transmission rod is fixedly connected to the lower surface of the transmission plate, and the bottom end of the transmission rod is fixedly connected to the upper surface of the base plate; the moving wheel is arranged at the bottom of the base plate.

10. A method for using a rock wool finishing device for rock wool production according to any one of claims 1 to 9, characterized in that: include: The upper extrusion assembly is driven to rise and fall by a hydraulic cylinder to adjust the gap between the finishing roller in the upper extrusion assembly and the finishing roller in the lower extrusion assembly to extrude the rock wool; The forward and reverse rotation of the forward and reverse motor is used to control the lifting and lowering of the box body, thereby adjusting the height of the upper extrusion component and the lower extrusion component.

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