A cord fabric uncreaser and a production method of an uncreaser roll

Abstract

The application discloses a cord fabric unwinding and wrinkle removing device and a production method of an unwinding roller, and belongs to the technical field of cord fabric manufacturing. The unwinding and wrinkle removing device comprises an unwinding roller, a main hot moistening positioning roller and an auxiliary hot moistening pressing roller. Cord fabric on a cord fabric winding disc sequentially passes through the unwinding roller, the main hot moistening positioning roller and the auxiliary hot moistening pressing roller. The unwinding roller is used to apply a force to the cord fabric, so that the cord fabric is stretched along the width direction of the cord fabric. The main hot moistening positioning roller is used to moisten and fix the unwound cord fabric. The auxiliary hot moistening pressing roller is used to assist in moistening the cord fabric. The unwinding and wrinkle removing device integrates unwinding, setting and moistening. When the cord fabric is unwound, the unwound state can be fixed, and the cord fabric surface can be smoothed and wrinkle-free in time through moistening, so that the cord fabric is prevented from being stained with glue due to wrinkles.

Description

Technical Field

[0001] This invention relates to the field of curtain fabric manufacturing technology, specifically a curtain fabric unfolding and wrinkle removal device and an unfolding roller production method. Background Technology

[0002] Cordless tire cord fabric primarily uses strong ply yarns as warp and medium to fine single yarns as weft, resulting in a tightly packed warp and a sparsely packed weft, resembling a curtain, hence the name. Cordless tire cord fabric is mainly used inside the walls of oil pipelines to enable them to withstand enormous pressure, impact loads, and strong vibrations.

[0003] In the production process of PVC-coated tire cord fabric, the fabric is typically impregnated with phenolic resin and latex, followed by drying, stretching, and heat treatment to ensure good adhesion to the rubber. However, during this process, adhesive spots can easily form on the surface of the tire cord fabric, affecting its quality. These adhesive spots are solid foreign matter that accumulates and adheres to the surface of the PVC-coated tire cord fabric. Their main components are cured phenolic resin and latex, with some containing fine fibers and dust. At these adhesive spot locations, the adhesion between the PVC-coated tire cord fabric and the rubber decreases significantly, leading to the risk of bulging and delamination in the oil pipeline. This not only degrades the appearance of the PVC-coated tire cord fabric but also jeopardizes the safety of the oil pipeline.

[0004] In the actual production process of tire cord fabric, the mass fraction of natural latex is usually significantly increased to improve calendering adhesion. The easy coagulation property of natural latex leads to an increase in adhesive spots. Additionally, some tire cord fabrics contain internal stress, causing wrinkles during transport, which is another reason for adhesive spots. In the current tire cord fabric production process, various factors contribute to the formation of adhesive spots on the fabric surface in order to improve performance. These adhesive spots degrade the surface quality of the tire cord fabric, significantly impacting its performance. Therefore, reducing adhesive spots on the surface of tire cord fabric is a common but difficult technical problem to solve in the industry. Summary of the Invention

[0005] The purpose of this invention is to provide a device for unfolding and wrinkle-removing cord fabric and a method for producing an unfolding roller. This unfolding and wrinkle-removing device can unfold the cord fabric to avoid the appearance of glue spots on the cord fabric due to wrinkles.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:

[0007] A cord fabric unfolding and wrinkle removal device includes an unfolding roller, a main heat-lubricating positioning roller, and an auxiliary heat-lubricating pressure roller. The unfolding roller, the main heat-lubricating positioning roller, and the auxiliary heat-lubricating pressure roller are arranged vertically. The cord fabric on the cord fabric roll reel passes sequentially around the unfolding roller, the main heat-lubricating positioning roller, and the auxiliary heat-lubricating pressure roller. The unfolding roller applies force to the cord fabric, causing it to stretch along its width direction to remove wrinkles from the surface of the cord fabric. The main heat-lubricating positioning roller is used to heat and moisten the cord fabric and cooperates with the unfolding roller to roll and press the cord fabric, fixing the unfolded cord fabric and preventing it from shrinking back in the width direction. The auxiliary heat-lubricating pressure roller cooperates with the main heat-lubricating positioning roller to roll and press the cord fabric, providing auxiliary heat-lubricating.

[0008] Preferably, the unfolding roller, the main hot-lubricating positioning roller, and the auxiliary hot-lubricating pressure roller are mounted on a support frame. The auxiliary hot-lubricating pressure roller is located directly above the main hot-lubricating positioning roller, and the main hot-lubricating positioning roller is located directly above the unfolding roller. The two ends of the auxiliary hot-lubricating pressure roller are mounted on a slider-type bearing seat via bearings. The slider-type bearing seat is located in a vertical groove on the support frame and can slide along the vertical groove. The slider-type bearing seat is rotatably connected to the lower end of the height adjusting screw. The upper end of the height adjusting screw passes upward through a height adjusting screw hole on the support frame and is connected to a height adjusting handwheel. The height adjusting screw is threadedly connected to the height adjusting screw hole. Rotating the height adjusting handwheel causes the height adjusting screw to rise and fall. The height adjusting screw causes the slider-type bearing seat to rise and fall along the vertical groove to adjust the distance between the auxiliary hot-lubricating pressure roller and the main hot-lubricating positioning roller.

[0009] Preferably, the support frame is further provided with a gravity tensioning roller. The two ends of the gravity tensioning roller are mounted on the bearing seat slider through bearings. The bearing seat slider is located in the free slide groove on the support frame and can slide freely along the free slide groove. The gravity tensioning roller presses on the curtain fabric with its own weight to tension the curtain fabric.

[0010] Preferably, it also includes a shaping roller assembly, through which the ironed curtain fabric passes. The shaping roller assembly includes a fixed roller and a pressure adjusting roller. The fixed roller is mounted on the support frame, and the pressure adjusting roller is located above the fixed roller. Both ends of the pressure adjusting roller are mounted on a slide block via bearings. The slide block is located in a groove on the support frame and can slide along the groove. The slide block is rotatably connected to the lower end of a pressure adjusting screw. The upper end of the pressure adjusting screw passes upward through a pressure adjusting screw hole on the support frame and is connected to a pressure adjusting handwheel. The pressure adjusting screw is threadedly connected to the pressure adjusting screw hole. Rotating the pressure adjusting handwheel causes the pressure adjusting screw to rise and fall, and the pressure adjusting screw causes the slide block to rise and fall along the groove to adjust the pressure between the pressure adjusting roller and the fixed roller.

[0011] Preferably, a fixed roller sleeve and an adjusting roller sleeve are respectively fitted on the circumferential surface of the fixed roller and the circumferential surface of the pressure adjusting roller.

[0012] Preferably, the circumferential surface of the unfolding roller is a smooth surface, and the circumferential surface of the unfolding roller is provided with a left transverse spreading thread and a right transverse spreading thread. The left transverse spreading thread and the right transverse spreading thread are the same in terms of structure and technical parameters, except that the spiral direction is opposite. The roughness of the circumferential surface of the unfolding roller is 0.2-0.8μm.

[0013] Preferably, the lengths of the left and right transverse push fabric spreading threads are both 1 / 4 to 1 / 3 of the length of the spreading roller, and both the left and right transverse push fabric spreading threads extend from the middle of the spreading roller towards both ends of the spreading roller.

[0014] Preferably, the main hot lubrication positioning roller is provided with positioning rubber rings at both ends near the main hot lubrication positioning roller, and the unfolding roller and the auxiliary hot lubrication pressure roller are provided with positioning annular grooves corresponding to the positioning rubber rings, and the positioning rubber rings press against the bottom of the positioning annular grooves.

[0015] A method for producing a spreading roller includes the following steps:

[0016] Step 1: Microstructure laser scanning of the unfolding roller: The unfolding roller is mounted on a rotating device. Short-pulse laser light emitted from the laser head of the laser device performs microstructure laser scanning on the circumferential surface of the unfolding roller, from one end to the other. The relevant parameters for microstructure laser scanning are as follows: defocusing amount 2.8-2.9mm; laser power 108-112W; repetition frequency 95-105kHz; scanning speed 1450-1550mm / s; spot overlap rate 86-88%.

[0017] Step 2: Laser cleaning of the unfolding roller: After the microstructure laser scanning process is completed and the temperature drops to room temperature, short-pulse lasers emitted from the laser head of the laser are used to perform laser cleaning on the surface of the unfolding roller, starting from one end. The relevant parameters for laser cleaning are as follows: defocusing amount: 3.3-3.5mm; laser power: 56-60W; repetition frequency: 70-80kHz; scanning speed: 2100-2200mm / s; spot overlap rate: 60-70%.

[0018] Step 3: Laser polishing of the unfolding roller surface: After laser cleaning, short-pulse laser light emitted from the laser head of the laser is used to laser polish the surface of the unfolding roller, starting from one end. The relevant parameters for laser polishing are as follows: defocusing amount: 3.3-3.5mm; laser power: 82-88W; repetition frequency: 90-94kHz; scanning speed: 1700-1800mm / s; spot overlap rate: 82-84%.

[0019] Step 4: Surface thread treatment of the spreading roller: Use a milling machine to mill the left and right transverse spreading threads on the surface of the spreading roller to complete the manufacturing of the spreading roller.

[0020] Preferably, in the short-pulse laser, the number of pulses in the pulse train is 4-6.

[0021] The beneficial effects of this invention are as follows:

[0022] This invention provides a wrinkle-removing device that integrates "unfolding, shaping, and ironing". While unfolding the curtain fabric, it not only fixes the unfolded state, but also promptly irons the surface of the curtain fabric to make it smooth and wrinkle-free, thus avoiding glue spots caused by wrinkles.

[0023] This invention employs laser processing, and through extensive experimentation, has obtained the corresponding technical parameters for laser processing. This not only further reduces the roughness value but also improves the efficiency of laser processing. By reducing the surface roughness of the unfolding roller, the frictional resistance during the unfolding of the fabric is reduced, making the fabric unfold more smoothly to both sides. Attached Figure Description

[0024] The present invention will be further described with reference to the accompanying drawings, but the embodiments in the drawings do not constitute any limitation on the present invention. For those skilled in the art, other drawings can be obtained based on the following drawings without creative effort:

[0025] Figure 1 This is a schematic diagram of the structure of the unfolding and shaping device of the present invention;

[0026] Figure 2 for Figure 1 The diagram shows the structure of the main hot lubrication positioning roller, the unfolding roller, and the auxiliary hot lubrication pressure roller.

[0027] In the diagram: 1. Unfolding roller; 2. Main hot-lubricating positioning roller; 3. Auxiliary hot-lubricating pressure roller; 4. Support frame; 5. Sliding bearing seat; 6. Vertical chute; 7. Height adjusting screw; 8. Height adjusting screw hole; 9. Height adjusting handwheel; 10. Cord fabric; 11. Gravity tensioning roller; 12. Bearing seat slider; 13. Free chute; 14. Fixed roller; 15. Pressure adjusting roller; 16. Slide seat; 17. Pressure adjusting screw; 18. Pressure adjusting screw hole; 19. Pressure adjusting handwheel; 20. Chute; 21. Fixed roller sleeve; 22. Adjusting roller sleeve; 23. Left transverse push fabric unfolding thread; 24. Right transverse push fabric unfolding thread; 25. Positioning rubber ring; 26. Positioning annular groove; 27. Positioning annular groove; 28. Steam conduit; 29. ​​Steam conduit; 30. Left guide roller; 31. Right guide roller. Detailed Implementation

[0028] To enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of this application can be combined with each other.

[0029] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper surface," "lower surface," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "forward," "reverse," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0030] like Figure 1As shown, a cord fabric unfolding and wrinkle removal device includes an unfolding roller 1, a main heat-lubricating positioning roller 2, and an auxiliary heat-lubricating pressure roller 3. The unfolding roller 1, the main heat-lubricating positioning roller 2, and the auxiliary heat-lubricating pressure roller 3 are arranged vertically. Specifically, the unfolding roller 1, the main heat-lubricating positioning roller 2, and the auxiliary heat-lubricating pressure roller 3 are mounted on a support frame 4. The auxiliary heat-lubricating pressure roller 3 is located directly above the main heat-lubricating positioning roller 2, and the main heat-lubricating positioning roller 2 is located directly above the unfolding roller 1. The cord fabric 10 on the cord fabric roll reel passes sequentially around the unfolding roller 1, the main heat-lubricating positioning roller 2, and the auxiliary heat-lubricating pressure roller 3. The main positioning roller 2 and the auxiliary heat-pressing roller 3 are used to apply force to the curtain fabric 10, causing the curtain fabric 10 to stretch along the width direction of the curtain fabric to remove wrinkles on the surface of the curtain fabric 10. The main heat-pressing positioning roller 2 is used to heat the curtain fabric and cooperates with the main positioning roller 1 to roll and press the curtain fabric 10, fixing the unfolded curtain fabric and preventing the curtain fabric from shrinking back in the width direction. The auxiliary heat-pressing roller 3 cooperates with the main heat-pressing positioning roller 2 to roll and press the curtain fabric 10, and to assist in heat-pressing the curtain fabric.

[0031] The two ends of the auxiliary hot-lubricating roller 3 are mounted on the slider bearing seat 5 via bearings. The slider bearing seat 5 is located in the vertical slide groove 6 on the support frame 4 and can slide along the vertical slide groove 6. The slider bearing seat 5 is rotatably connected to the lower end of the height adjusting screw 7. The upper end of the height adjusting screw 7 passes upward through the height adjusting screw hole 8 on the support frame 4 and is connected to the height adjusting handwheel 9. The height adjusting screw 7 is threadedly connected to the height adjusting screw hole 8. Rotating the height adjusting handwheel 9 causes the height adjusting screw 7 to rise and fall. The height adjusting screw 7 causes the slider bearing seat 5 to rise and fall along the vertical slide groove 6 to adjust the distance between the auxiliary hot-lubricating roller 3 and the main hot-lubricating positioning roller 2.

[0032] The support frame 4 is also equipped with a gravity tension roller 11. Both ends of the gravity tension roller 11 are mounted on a bearing seat slider 12 via bearings. The bearing seat slider 12 is located in a free slide groove 13 on the support frame 4 and can slide freely along the free slide groove 13. The gravity tension roller 11 presses down on the curtain fabric 10 with its entire weight, tensioning the curtain fabric 10. A left guide roller 30 and a right guide roller 31 are respectively provided on the support frame 4 on the left and right sides of the gravity tension roller 11. The left guide roller 30 and the right guide roller 31 are located above the gravity tension roller 11, and the curtain fabric 10 passes over the top of the left guide roller 30 and the top of the right guide roller 31.

[0033] The present invention also includes a shaping roller assembly, through which the ironed curtain fabric passes. The shaping roller assembly includes a fixed roller 14 and a pressure adjusting roller 15. The fixed roller 14 is mounted on the support frame 4, and the pressure adjusting roller 15 is located above the fixed roller 14. Both ends of the pressure adjusting roller 15 are mounted on a slide block 16 via bearings. The slide block 16 is located in a slide groove 20 on the support frame 4 and can slide along the slide groove 20. The slide block 16 is rotatably connected to the lower end of a pressure adjusting screw 17. The upper end of the pressure adjusting screw 17 passes upward through a pressure adjusting screw hole 18 on the support frame 4 and is connected to a pressure adjusting handwheel 19. The pressure adjusting screw 17 is threadedly connected to the pressure adjusting screw hole 18. Rotating the pressure adjusting handwheel 19 causes the pressure adjusting screw 17 to rise and fall. The pressure adjusting screw 17 causes the slide block 16 to rise and fall along the slide groove 20 to adjust the pressure between the pressure adjusting roller 15 and the fixed roller 14. The fixed roller 14 and the pressure regulating roller 15 are respectively fitted with a fixed roller sleeve 21 and a regulating roller sleeve 22 on their circumferential surfaces.

[0034] The main hot-lubricating positioning roller 2 and the auxiliary hot-lubricating pressure roller 3 are heated by steam. The heating chambers in the main hot-lubricating positioning roller 2 and the auxiliary hot-lubricating pressure roller 3 are respectively connected to steam conduits 28 and 29. Steam is used to heat the roller surfaces of the main hot-lubricating positioning roller 2 and the auxiliary hot-lubricating pressure roller 3.

[0035] like Figure 2 As shown, the circumferential surface of the unfolding roller 1 is a smooth surface. The circumferential surface of the unfolding roller is provided with a left transverse spreading thread 23 and a right transverse spreading thread 24. The left transverse spreading thread 23 and the right transverse spreading thread 24 are the same in terms of structure and technical parameters, except that the spiral directions are opposite. The roughness of the circumferential surface of the unfolding roller is 0.2-0.8μm.

[0036] The lengths of the left and right transverse spreading threads are both 1 / 4 to 1 / 3 of the length of the spreading roller, and both extend from the middle of the spreading roller towards both ends. The lengths of the left and right transverse spreading threads cannot be too long. If they are too long, when the fabric deviates, the contact length between the fabric and the threads will be different, resulting in different forces and exacerbating the fabric deviation. Conversely, the lengths of the threads cannot be too short either. If they are too short, the force applied to the fabric by the threads will be insufficient, failing to achieve the desired spreading effect.

[0037] Positioning rubber rings 25 are provided on both ends of the main heat-lubricating positioning roller 2 and near the main heat-lubricating positioning roller. Positioning annular grooves 26 and 27, respectively, corresponding to the positioning rubber rings 25, are provided on the unfolding roller 1 and the auxiliary heat-lubricating pressure roller 3. The positioning rubber rings 25 press against the bottom of the positioning annular grooves 26 and 27. This invention's unfolding wrinkle-removing device integrates "unfolding, shaping, and heat-lubricating" into one unit. While unfolding the curtain fabric, it not only fixes the unfolded state but also promptly heats the surface of the curtain fabric to make it smooth and wrinkle-free, thus avoiding glue spots caused by wrinkles and ensuring product quality.

[0038] A method for producing a spreading roller includes the following steps:

[0039] Step 1: Microstructure laser scanning of the unfolding roller: The unfolding roller is mounted on a rotating device. Short-pulse laser light emitted from the laser head of the laser device performs microstructure laser scanning on the circumferential surface of the unfolding roller, from one end to the other. The relevant parameters for microstructure laser scanning are as follows: defocusing amount 2.8-2.9mm; laser power 108-112W; repetition frequency 95-105kHz; scanning speed 1450-1550mm / s; spot overlap rate 86-88%.

[0040] Step 2: Laser cleaning of the unfolding roller: After the microstructure laser scanning process is completed and the temperature drops to room temperature, short-pulse lasers emitted from the laser head of the laser are used to perform laser cleaning on the surface of the unfolding roller, starting from one end. The relevant parameters for laser cleaning are as follows: defocusing amount: 3.3-3.5mm; laser power: 56-60W; repetition frequency: 70-80kHz; scanning speed: 2100-2200mm / s; spot overlap rate: 60-70%.

[0041] Step 3: Laser polishing of the unfolding roller surface: After laser cleaning, short-pulse laser light emitted from the laser head of the laser is used to laser polish the surface of the unfolding roller, starting from one end. The relevant parameters for laser polishing are as follows: defocusing amount: 3.3-3.5mm; laser power: 82-88W; repetition frequency: 90-94kHz; scanning speed: 1700-1800mm / s; spot overlap rate: 82-84%.

[0042] Step 4: Surface thread treatment of the spreading roller: Use a milling machine to mill the left and right transverse spreading threads on the surface of the spreading roller to complete the manufacturing of the spreading roller.

[0043] In the short-pulse laser, the number of pulses in the pulse train is 4-6.

[0044] Through extensive experimentation, the corresponding technical parameters for laser processing were obtained, which not only further reduced the roughness value but also improved the laser processing efficiency. By reducing the surface roughness of the unfolding roller, the frictional resistance during the unfolding of the cord fabric is reduced, making the cord fabric unfold more smoothly to both sides.

[0045] Furthermore, those skilled in the art can combine and integrate the different embodiments or examples described herein, as well as the features of those embodiments or examples, without contradiction. Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. A curtain fabric unfolding and wrinkle-removing device, characterized in that: It includes an unfolding roller, a main hot-lubricating positioning roller, and an auxiliary hot-lubricating pressure roller. The unfolding roller, the main hot-lubricating positioning roller, and the auxiliary hot-lubricating pressure roller are arranged in a vertical direction. The cord fabric on the cord fabric roll reel passes around the unfolding roller, the main hot-lubricating positioning roller, and the auxiliary hot-lubricating pressure roller in sequence. The unfolding roller is used to apply force to the cord fabric, so that the cord fabric stretches along the width direction of the cord fabric to remove wrinkles on the surface of the cord fabric. The main heat-lubricating positioning roller is used to heat and lubricate the cord fabric, and cooperates with the unfolding roller to roll and press the cord fabric, fixing the unfolded cord fabric and preventing it from shrinking back in the width direction. The auxiliary heat-lubricating pressure roller cooperates with the main heat-lubricating positioning roller to roll and press the cord fabric, and to assist in the heat-lubricating process. The circumferential surface of the unfolding roller is smooth, and the circumferential surface of the unfolding roller is provided with a left-side and a right-side transverse push-laying thread. The left-side and right-side transverse push-laying threads are identical in structure and technology, except that their spiral directions are opposite. All parameters are the same; the surface roughness of the circumferential surface of the unfolding roller is 0.2-0.8μm; the lengths of the left and right transverse push-spreading threads are both 1 / 4 to 1 / 3 of the length of the unfolding roller, and both the left and right transverse push-spreading threads extend from the middle of the unfolding roller to both ends of the unfolding roller; positioning rubber rings are provided on the main hot lubrication positioning roller and near both ends of the main hot lubrication positioning roller, and positioning annular grooves corresponding to the positioning rubber rings are provided on the unfolding roller and the auxiliary hot lubrication pressure roller, and the positioning rubber rings press against the bottom of the positioning annular grooves; The unfolding roller, the main hot lubrication positioning roller, and the auxiliary hot lubrication pressure roller are mounted on the support frame. The auxiliary hot lubrication pressure roller is located directly above the main hot lubrication positioning roller, and the main hot lubrication positioning roller is located directly above the unfolding roller. The two ends of the auxiliary hot lubrication pressure roller are mounted on the slider bearing seat through bearings. The slider bearing seat is located in the vertical groove on the support frame and can slide along the vertical groove. It also includes a shaping roller assembly, through which the heat-pressed fabric passes; The support frame is also equipped with a gravity tensioning roller. The two ends of the gravity tensioning roller are mounted on the bearing seat slider through bearings. The bearing seat slider is located in the free slide groove on the support frame and can slide freely along the free slide groove. The cord fabric after passing through the shaping roller group passes through the gravity tensioning roller and is pressed onto the cord fabric by its own weight, thus tensioning the cord fabric.

2. The curtain fabric unfolding and wrinkle-removing device according to claim 1, characterized in that: The slider bearing housing is rotatably connected to the lower end of the height adjusting screw. The upper end of the height adjusting screw passes upward through the height adjusting screw hole on the support frame and is connected to the height adjusting handwheel. The height adjusting screw is threadedly connected to the height adjusting screw hole. Rotating the height adjusting handwheel causes the height adjusting screw to rise and fall. The height adjusting screw causes the slider bearing housing to rise and fall along the vertical slide groove to adjust the distance between the auxiliary hot lubrication pressure roller and the main hot lubrication positioning roller.

3. The curtain fabric unfolding and wrinkle-removing device according to claim 1, characterized in that: The shaping roller assembly includes a fixed roller and a pressure regulating roller. The fixed roller is mounted on the support frame, and the pressure regulating roller is located above the fixed roller. Both ends of the pressure regulating roller are mounted on a slide block via bearings. The slide block is located in a groove on the support frame and can slide along the groove. The slide block is rotatably connected to the lower end of a pressure regulating screw. The upper end of the pressure regulating screw passes upward through a pressure regulating screw hole on the support frame and is connected to a pressure regulating handwheel. The pressure regulating screw is threadedly connected to the pressure regulating screw hole. Rotating the pressure regulating handwheel causes the pressure regulating screw to rise and fall, which in turn causes the slide block to rise and fall along the groove to adjust the pressure between the pressure regulating roller and the fixed roller. A fixed roller rubber sleeve and an regulating roller rubber sleeve are respectively fitted on the circumferential surface of the fixed roller and the circumferential surface of the pressure regulating roller.

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