Automatic cold rolling machine with edge straightening function for steel strip processing

Abstract

This invention discloses an automated cold rolling mill for steel strip processing with edge trimming function. The invention relates to the field of cold rolling equipment and includes: a frame; active winding rollers are arranged at the upper and lower ends of the inner side of the frame; an auxiliary roller is arranged in the middle of the inner side of the frame; end bushings are arranged on both sides of the active winding rollers; and an edge trimming mechanism is arranged on one side of the outer side of the frame. This automated cold rolling mill for steel strip processing with edge trimming function drives a gear to rotate via the end bushings of the active winding rollers. The gear meshes with a side toothed plate to drive vertical movement. The side toothed plate drives a pressure shaft, a connecting plate, and a sliding shaft to slide along the side frame. The connecting plate drives a center plate and a clamping plate to move via a C-shaped tube. A frosted strip on the inner side of the clamping plate polishes both sides of the steel strip. A miniature telescopic rod drives a locking bar to engage in a locking groove, controlling the start and stop of the edge trimming function. A limit plate at the bottom of the sliding shaft restricts the movement stroke, and a compression spring resets the components, ensuring stable operation of the steel strip edge trimming process.

Description

Technical Field

[0001] This invention relates to the field of cold rolling equipment technology, specifically to an automated cold rolling mill for steel strip processing with edge trimming function. Background Technology

[0002] Cold rolling technology is widely used in industries such as precision metal material processing and steel product manufacturing. In the process of cold rolling steel strip, there are common problems such as burrs easily generated on the edge of the steel strip and insufficient flatness. At the same time, the edge trimming function of existing equipment often has problems such as inconvenient start-stop control and lack of reliable component reset, which directly affects the stable operation of the edge trimming process, thereby reducing the processing quality and production efficiency of cold rolled products.

[0003] According to CN120023184B, this cold rolling mill adopts an upper rolling mechanism consisting of a lifting drive component, an upper drive assembly, an upper rotating seat, and an upper rolling roll, and a lower rolling mechanism consisting of a lower drive assembly, a lower rotating seat, and a lower rolling roll. By replacing the upper and lower rolling rolls with those adapted to different cold-rolled sheet sizes, the plate marks left on the rolling rolls by cold-rolled sheets of different sizes are eliminated, and the plate marks on the rolling rolls are prevented from being transferred to the surface of the cold-rolled sheet, thereby improving the surface smoothness of the cold-rolled sheet.

[0004] However, the above technical solution lacks an edge-aligning execution structure that drives the component to move through the meshing of gears and side gear plates, and also lacks a locking component to control the start and stop of the edge-aligning function. At the same time, it lacks limit and reset components to ensure the component's movement stroke and reset effect, making it impossible to stably complete the grinding and edge-aligning process of the steel strip edge. As a result, the steel strip edge is still prone to unevenness, making it difficult to ensure the stable operation of the edge-aligning process.

[0005] Therefore, in order to address the existing shortcomings, we conducted research and improvements and proposed an automated cold rolling mill for steel strip processing with edge trimming function. Summary of the Invention

[0006] The purpose of this invention is to provide an automated cold rolling mill for steel strip processing with edge trimming function, so as to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: an automated cold rolling mill for steel strip processing with edge trimming function, comprising: a frame, with active winding rollers arranged at the upper and lower ends of the inner side of the frame, an auxiliary roller arranged at the middle of the inner side of the frame, and end bushings arranged on both sides of the active winding rollers;

[0008] An edge-trimming mechanism is provided on one side of the outside of the frame. The edge-trimming mechanism includes a center plate, which is located in the middle of the inside of the frame.

[0009] An auxiliary mechanism is provided on the inner side of the center plate. The auxiliary mechanism includes an inner notch, which is located in the middle of the center plate.

[0010] A liquid spraying mechanism is provided at the bottom of one side of the frame. The liquid spraying mechanism includes a base plate, which is located at the bottom of one side of the frame.

[0011] Furthermore, the edge-aligning mechanism also includes a side toothed plate, a sliding shaft, a compression spring, a buffer pad, a miniature telescopic rod, a gear, a rotating shaft, a pressure shaft, a connecting plate, a side frame, a locking latch, a locking bar, a locking groove, and a locking plate. The bottom sides of the center plate are provided with locking plates, the bottom sides of the front sides of the center plate are provided with connecting plates, the front end of the top of the connecting plate is provided with a pressure shaft, the top of the pressure shaft is provided with a side toothed plate, one side of the side toothed plate is provided with a gear, a rotating shaft is transversely inserted through the inner side of the gear, miniature telescopic rods are provided at both ends of the back of the gear, a locking bar is provided at one end of the miniature telescopic rod, the buffer pad is located outside the end bushing, a locking latch is located at one end of the buffer pad, a locking groove is provided inside the locking latch, a sliding shaft is located at the bottom of the connecting plate, a compression spring is sleeved on the outside of the sliding shaft, a limit plate is provided at the bottom of the sliding shaft, and the side frame is located on both sides of the front of the frame.

[0012] Furthermore, the side frame is fixedly connected to the frame, and the sliding shaft is vertically sliding with respect to the side frame.

[0013] Furthermore, the sawtooth structure of the gear meshes with the sawtooth structure of the side tooth plate, and the side tooth plate is fixedly connected to the pressure shaft.

[0014] Furthermore, a C-shaped tube is transversely arranged on the inner side of the front end of the center plate, and the C-shaped tube is fixedly connected to the connecting plate. A matching bearing is provided between the gear and the rotating shaft.

[0015] Furthermore, the inner side of the card plate is vertically grooved, and sandpaper can be clamped inside the groove.

[0016] Furthermore, the auxiliary mechanism also includes a hammer, an adapter frame, a mounting frame, a hydraulic cylinder, a rotating rod, a retaining block, a bending plate, a spring, and a rotating tube. A rotating rod is laterally arranged on the inner side of the inner notch near the front end of the center plate. A bending plate is sleeved on the outside of the rotating rod. The retaining block is located at the middle of the top of the center plate. A rotating tube is inserted through the inner side of the retaining block. A spring is located at the middle of the back of the retaining block. A hammer is located directly above the bending plate. A hydraulic cylinder is located on the top of the hammer. An adapter frame is located on the outside of the hydraulic cylinder. Mounting frames are located on both sides of the adapter frame.

[0017] Furthermore, the mounting frame and the base plate are welded together, the adapter frame and the hammer are fixedly connected, the bottom of the bending plate has a round hammer shape, the bending plate and the rotating rod have a rotating structure, the rotating tube and the fixing block form a rotating structure, and the position of the bending plate is parallel to the interlayer of the active roller and the auxiliary roller.

[0018] Furthermore, the spraying mechanism also includes an infusion pipe, a nozzle, a water tank, a water pump, a push rod, and a piston cylinder. The piston cylinder is located on the top of the base plate. A push rod is vertically inserted through the inner side of the piston cylinder. A circular push plate is located at the bottom of the push rod. A water tank is located on one side of the piston cylinder. A water pump is located between the piston cylinder and the water tank. An infusion pipe is located at the upper end of the piston cylinder. A nozzle is located at one end of the infusion pipe.

[0019] Furthermore, water pipes are connected to the connection points of the piston cylinder, the auxiliary roller, and the water pump, and the center point of the infusion pipe is on the same horizontal line as the interlayer between the active roller and the auxiliary roller.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] 1. The edge-trimming mechanism of this invention drives the gear to rotate via the active roller end bushing. The gear meshes with the side toothed plate to drive vertical movement. The side toothed plate drives the pressure shaft, connecting plate, and sliding shaft to slide along the side frame. The connecting plate drives the center plate and clamping plate to move via a C-shaped tube. The inner side of the clamping plate is polished by a frosting strip on both sides of the steel strip. A miniature telescopic rod drives the locking bar to engage in the locking groove, controlling the start and stop of the edge-trimming function. The bottom limit plate of the sliding shaft restricts the movement stroke, and the compression spring realizes the component reset, ensuring the stable operation of the steel strip edge-trimming process.

[0022] 2. In the auxiliary mechanism of this invention, the hydraulic cylinder drives the hammer to move downward, abutting the bending plate within the inner notch to rotate around the rotating rod, and the bottom of the bending plate presses against the top of the steel strip. The rotating tube rotates with the bending plate within the fixed block, and the curved spring assists the bending plate to reset. The bending plate is parallel to the active roll and the auxiliary roll sandwich layer, ensuring that the steel strip is subjected to uniform force during cold rolling, maintaining the flatness of the steel strip, and avoiding local bulges or bends.

[0023] 3. The spraying mechanism of this invention drives the push rod to move inside the piston cylinder by moving the side toothed plate up and down. The water pump draws liquid from the water tank into the piston cylinder, and the liquid is transported to the nozzle through the liquid delivery pipe. The center point of the liquid delivery pipe is on the same horizontal line as the interlayer of the active roll and the auxiliary roll. The nozzle sprays the protective liquid onto the surface of the steel strip, achieving uniform coverage of the protective liquid, improving the surface strength of the steel strip, and ensuring processing quality in conjunction with the cold rolling process. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the automated cold rolling mill for steel strip processing with edge trimming function according to the present invention;

[0025] Figure 2 This invention relates to an automated cold rolling mill for steel strip processing with edge trimming function. Figure 1 A magnified structural diagram at point A;

[0026] Figure 3 This is a schematic diagram of the water tank, water pump and piston cylinder assembly of the liquid spraying mechanism of the automated cold rolling mill for steel strip processing with edge trimming function of the present invention.

[0027] Figure 4 This invention relates to an automated cold rolling mill for steel strip processing with edge trimming function. Figure 3 A magnified structural diagram at point B;

[0028] Figure 5 This invention relates to an automated cold rolling mill for steel strip processing with edge trimming function. Figure 3 A magnified structural diagram at point C;

[0029] Figure 6 This is a schematic diagram showing the positions of the piston cylinder, active roll, and auxiliary roll of the liquid spraying mechanism of the automated cold rolling mill for steel strip processing with edge trimming function according to the present invention.

[0030] Figure 7 This invention relates to an automated cold rolling mill for steel strip processing with edge trimming function. Figure 6 A magnified structural diagram at point D;

[0031] Figure 8 This is a schematic diagram showing the linkage between the hydraulic cylinder, hammer, and edge-setting mechanism of the auxiliary mechanism of the automated cold rolling mill for steel strip processing with edge-setting function according to the present invention.

[0032] In the diagram: 1. Frame; 2. End sleeve; 3. Hammer; 4. Adapter frame; 5. Mounting frame; 6. Side toothed plate; 7. Base plate; 8. Infusion tube; 9. Active roller; 10. Sliding shaft; 11. Compression spring; 12. Buffer pad; 13. Miniature telescopic rod; 14. Gear; 15. Rotating shaft; 16. Pressure shaft; 17. Connecting plate; 18. Hydraulic cylinder body; 19. Side frame; 20. Limiting plate; 21. Nozzle; 22. Water tank; 23. Water pump; 24. Push rod; 25. Rotating rod; 26. Center plate; 27. Fixing block; 28. Bending plate; 29. ​​Inner notch; 30. Crank spring; 31. Rotating tube; 32. Piston cylinder; 33. Auxiliary roller; 34. Lock; 35. Locking bar; 36. Locking groove; 37. Clamping plate. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] Example

[0035] like Figures 1 to 8 As shown, an automated cold rolling mill for steel strip processing with edge trimming function includes: a frame 1, an active winding roller 9 is provided at the upper and lower ends of the inner side of the frame 1, an auxiliary roller 33 is provided at the middle of the inner side of the frame 1, and end bushings 2 are provided on both sides of the active winding roller 9.

[0036] An edge trimming mechanism is provided on one side of the outside of the frame 1. The edge trimming mechanism includes a center plate 26, which is located in the middle of the inside of the frame 1.

[0037] An auxiliary mechanism is provided on the inner side of the center plate 26. The auxiliary mechanism includes an inner notch 29, which is located in the middle of the center plate 26.

[0038] A liquid spraying mechanism is provided at the bottom of one side of the frame 1. The liquid spraying mechanism includes a base plate 7, which is located at the bottom of one side of the frame 1.

[0039] Among them, the end bushing 2 on one side of the active winding roller 9 is connected to an external power supply. When the active winding roller 9 starts to rotate, an automated steel sheet can be placed between the active winding roller 9 and the auxiliary roller 33. The active winding roller 9 and the auxiliary roller 33 will roll and squeeze the steel sheet to achieve the cold rolling effect.

[0040] Example 1: As Figures 1 to 8As shown, the edge-aligning mechanism also includes a side toothed plate 6, a sliding shaft 10, a compression spring 11, a buffer pad 12, a miniature telescopic rod 13, a gear 14, a rotating shaft 15, a pressure shaft 16, a connecting plate 17, a side frame 19, a locking lock 34, a locking bar 35, a locking groove 36, and a locking plate 37. Locking plates 37 are provided on both sides of the bottom of the center plate 26, and connecting plates 17 are provided at the bottom of both sides of the front end of the center plate 26. A pressure shaft 16 is provided at the front end of the top of the connecting plate 17, and a side toothed plate 6 is provided on the top of the pressure shaft 16. A gear is provided on one side of the side toothed plate 6. Gear 14, with a rotating shaft 15 extending horizontally through the inner side of gear 14, and miniature telescopic rods 13 at both ends of the back of gear 14. A locking bar 35 is provided at one end of the miniature telescopic rod 13. A buffer pad 12 is provided outside the end bushing 2. A locking lock 34 is provided at one end of the buffer pad 12. A locking groove 36 is provided inside the locking lock 34. A sliding shaft 10 is provided at the bottom of the connecting plate 17. A compression spring 11 is sleeved on the outside of the sliding shaft 10. A limit piece 20 is provided at the bottom of the sliding shaft 10. Side frames 19 are provided on both sides of the front of the frame 1.

[0041] The side frame 19 is fixedly connected to the frame 1, and the sliding shaft 10 is vertically sliding with respect to the side frame 19;

[0042] The sawtooth structure of gear 14 meshes with the sawtooth structure of side tooth plate 6, and the side tooth plate 6 is fixedly connected to the pressure shaft 16.

[0043] A C-shaped tube is horizontally installed on the inner side of the front end of the center plate 26. The C-shaped tube is fixedly connected to the connecting plate 17. A matching bearing is installed between the gear 14 and the rotating shaft 15.

[0044] The inner side of the card plate 37 has a vertical groove, and the inner side of the groove can hold sandpaper.

[0045] When the active roller 9 is rotating, the end bushing 2 on the other side of the active roller 9 starts to drive the gear 14 to rotate. The gear 14 drives the side toothed plate 6 to move vertically. When the side toothed plate 6 moves, the side toothed plate 6 drives the pressure shaft 16 to move. The pressure shaft 16 drives the connecting plate 17 to move. The connecting plate 17 drives the sliding shaft 10 to move vertically inside the side frame 19. The limiting piece 20 at the bottom of the sliding shaft 10 prevents it from moving excessively. At the same time, the compression spring 11 can help the sliding shaft 10 to reset after losing power.

[0046] When the connecting plate 17 moves, the connecting plate 17 drives the C-shaped tube to move, the C-shaped tube drives the middle plate 26 to move, and the middle plate 26 drives the clamping plates 37 on both sides of its bottom to move. Before the clamping plate 37 moves, the user can insert the abrasive strip on the outside of the grinding steel sheet into its inside. When the clamping plate 37 moves up and down, the clamping plate 37 drives the abrasive strip to continuously grind both sides of the steel sheet to achieve the edge trimming effect.

[0047] In addition, one end of the micro telescopic rod 13 is moved by controlling it. One end of the micro telescopic rod 13 can drive the lock bar 35 to engage in the lock groove 36 inside the lock 34. The user can connect the micro telescopic rod 13 to the control program. When the side adjustment function is needed, the user starts the micro telescopic rod 13. The micro telescopic rod 13 drives the lock bar 35 to insert into the lock groove 36. At this time, the gears 14 will be connected to each other.

[0048] Example 2: Figures 1 to 8 As shown, the auxiliary mechanism also includes a hammer 3, an adapter frame 4, a mounting frame 5, a hydraulic cylinder 18, a rotating rod 25, a retaining block 27, a bending plate 28, a spring 30, and a rotating tube 31. A rotating rod 25 is horizontally arranged on the inner side of the inner notch 29 near the front end of the middle plate 26. A bending plate 28 is sleeved on the outside of the rotating rod 25. The retaining block 27 is located in the middle of the top of the middle plate 26. A rotating tube 31 is inserted through the inner side of the retaining block 27. A spring 30 is located in the middle of the back of the retaining block 27. A hammer 3 is located directly above the bending plate 28. A hydraulic cylinder 18 is located on the top of the hammer 3. An adapter frame 4 is located on the outside of the hydraulic cylinder 18. Mounting frames 5 are located on both sides of the adapter frame 4.

[0049] The mounting frame 5 and the base plate 7 are welded together, the adapter frame 4 and the hammer 3 are fixedly connected, the bottom of the bending plate 28 has a round hammer shape, the bending plate 28 and the rotating rod 25 are rotating, the rotating tube 31 and the fixing block 27 form a rotating structure, and the position of the bending plate 28 is parallel to the interlayer of the active roller 9 and the auxiliary roller 33.

[0050] The hydraulic cylinder 18 inside the adapter 4 is activated, which drives the hammer 3 to move downward. The hammer 3 abuts against the bending plate 28 inside the inner notch 29. At this time, the bending plate 28 is rotated outside the rotating rod 25 under the force. The round hammer-shaped structure at the bottom of the bending plate 28 will squeeze the top of the conveyed steel sheet. When the bending plate 28 rotates, the rotating tube 31 rotates with it. The rotating tube 31 rotates inside the fixing block 27, and the spring 30 helps the bending plate 28 to reset after losing power.

[0051] Example 3: Figures 1 to 8 As shown, the spraying mechanism also includes an infusion pipe 8, a nozzle 21, a water tank 22, a water pump 23, a push rod 24, and a piston cylinder 32. The piston cylinder 32 is located on the top of the base plate 7. The push rod 24 is vertically installed through the inner side of the piston cylinder 32. A circular push plate is installed at the bottom of the push rod 24. A water tank 22 is installed on one side of the piston cylinder 32. A water pump 23 is installed between the piston cylinder 32 and the water tank 22. An infusion pipe 8 is installed at the upper end of the piston cylinder 32. A nozzle 21 is installed at one end of the infusion pipe 8.

[0052] Water pipes are connected to the piston cylinder 32, the auxiliary roller 33, and the water pump 23. The center point of the infusion pipe 8 is on the same horizontal line as the interlayer between the active roller 9 and the auxiliary roller 33.

[0053] When the side toothed plate 6 moves up and down, the side toothed plate 6 drives the push rod 24 to move up and down inside the piston cylinder 32. At the same time, the water pump 23 is started. The water pump 23 draws the liquid inside the water tank 22 into the piston cylinder 32. The piston cylinder 32 sends the protective liquid to the infusion pipe 8 through the infusion pipe 8. The infusion pipe 8 sprays the protective liquid onto the surface of the steel sheet being treated, thereby increasing the strength of the steel sheet surface.

[0054] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An automated cold rolling mill for steel strip processing with edge trimming function, comprising: The frame (1) is characterized in that an active winding roller (9) is provided at the upper and lower ends of the inner side of the frame (1), an auxiliary roller (33) is provided at the middle of the inner side of the frame (1), and end bushings (2) are provided on both sides of the active winding roller (9). An edge trimming mechanism is provided on one side of the outside of the frame (1). The edge trimming mechanism includes a center plate (26), which is located in the middle of the inside of the frame (1). An auxiliary mechanism is provided on the inner side of the center plate (26), the auxiliary mechanism including an inner notch (29), the inner notch (29) being located in the middle of the center plate (26); A liquid spraying mechanism is provided at the bottom of one side of the frame (1), and the liquid spraying mechanism includes a base plate (7), which is located at the bottom of one side of the frame (1); The edge-aligning mechanism also includes a side toothed plate (6), a sliding shaft (10), a compression spring (11), a buffer pad (12), a miniature telescopic rod (13), a gear (14), a rotating shaft (15), a pressure shaft (16), a connecting plate (17), a side frame (19), a locking lock (34), a locking bar (35), a locking groove (36), and a locking plate (37). The bottom sides of the center plate (26) are provided with locking plates (37), the bottom sides of the front ends of the center plate (26) are provided with connecting plates (17), the front end of the top of the connecting plate (17) is provided with a pressure shaft (16), the top of the pressure shaft (16) is provided with a side toothed plate (6), and one side of the side toothed plate (6) is provided with a gear (14). 4) A rotating shaft (15) is transversely arranged on the inner side of the gear (14). Miniature telescopic rods (13) are arranged at both ends of the back of the gear (14). A locking bar (35) is arranged at one end of the miniature telescopic rod (13). The buffer pad (12) is arranged outside the end bushing (2). A locking lock (34) is arranged at one end of the buffer pad (12). A locking groove (36) is arranged inside the locking lock (34). A sliding shaft (10) is arranged at the bottom of the connecting plate (17). A compression spring (11) is sleeved on the outside of the sliding shaft (10). A limit piece (20) is arranged at the bottom of the sliding shaft (10). The side frame (19) is arranged on both sides of the front of the frame (1). The side frame (19) is fixedly connected to the frame (1), and the sliding shaft (10) is vertically sliding with respect to the side frame (19). The sawtooth structure of the gear (14) meshes with the sawtooth structure of the side tooth plate (6), and the side tooth plate (6) and the pressure shaft (16) are fixedly connected. A C-shaped tube is horizontally arranged through the inner side of the front end of the middle plate (26). The C-shaped tube is fixedly connected to the connecting plate (17). A matching bearing is provided between the gear (14) and the rotating shaft (15). The inner side of the card plate (37) is vertically grooved, and sandpaper can be inserted into the inner side of the groove.

2. The automated cold rolling mill for steel strip processing with edge trimming function according to claim 1, characterized in that, The auxiliary mechanism also includes a hammer (3), an adapter (4), a mounting bracket (5), a hydraulic cylinder (18), a rotating rod (25), a retaining block (27), a bending plate (28), a spring (30), and a rotating tube (31). A rotating rod (25) is arranged laterally on the inner side of the inner notch (29) near the front end of the middle plate (26). A bending plate (28) is sleeved on the outside of the rotating rod (25). The retaining block (27) is located at the middle of the top of the middle plate (26). A rotating tube (31) is provided through the inner side of the retaining block (27). A spring (30) is provided at the middle of the back of the retaining block (27). A hammer (3) is located directly above the bending plate (28). A hydraulic cylinder (18) is located on the top of the hammer (3). An adapter (4) is located on the outside of the hydraulic cylinder (18). Mounting brackets (5) are provided on both sides of the adapter (4).

3. The automated cold rolling mill for steel strip processing with edge trimming function according to claim 2, characterized in that, The mounting bracket (5) is welded to the base plate (7), the adapter bracket (4) is fixed to the hammer (3), the bottom of the bending plate (28) is a round hammer shape, the bending plate (28) and the rotating rod (25) are a rotating structure, the rotating tube (31) and the fixing block (27) form a rotating structure, and the position of the bending plate (28) is parallel to the interlayer of the active roller (9) and the auxiliary roller (33).

4. The automated cold rolling mill for steel strip processing with edge trimming function according to claim 1, characterized in that, The spraying mechanism also includes an infusion pipe (8), a nozzle (21), a water tank (22), a water pump (23), a push rod (24), and a piston cylinder (32). The piston cylinder (32) is located on the top of the base plate (7). A push rod (24) is vertically inserted through the inner side of the piston cylinder (32). A circular push plate is provided at the bottom of the push rod (24). A water tank (22) is provided on one side of the piston cylinder (32). A water pump (23) is provided between the piston cylinder (32) and the water tank (22). An infusion pipe (8) is provided at the upper end of the piston cylinder (32). A nozzle (21) is provided at one end of the infusion pipe (8).

5. The automated cold rolling mill for steel strip processing with edge trimming function according to claim 4, characterized in that, Water pipes are connected to the piston cylinder (32), the auxiliary roller (33), and the water pump (23). The center point of the infusion pipe (8) is on the same horizontal line as the interlayer between the active roller (9) and the auxiliary roller (33).

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