Automatic unwinding and pressure adjusting device for nonwoven fabric clothing

Abstract

The utility model discloses non -woven clothing automatic uncoiling pressure adjusting device relates to non -woven fabric processing equipment technical field, including installation frame, horizontal shift frame, gas inflation axle, roll stock feeding frame, cloth passes the roller, tension control mechanism and horizontal shift mechanism, the utility model discloses through setting tension control mechanism, push rod as executor, can drive control roller group accurate swing around the rotation axis to change cloth angle of wrap to real -time regulation tension, and detection sensor as feedback unit, directly or indirectly detect the stress state of rotation axis. The two and the control system in the electrical box jointly constitute a dynamic closed loop, can real -time sensing tension change and fast response compensation, fundamentally solved the tension fluctuation problem caused by the change of roll diameter, ensured the constant tension of cloth in the uncoiling process, no stretch, no wrinkle, significantly improved product quality.

Description

Technical Field

[0001] This utility model relates to the technical field of nonwoven fabric processing equipment, and in particular to an automatic unwinding pressure adjustment device for nonwoven fabric garments. Background Technology

[0002] In the production of nonwoven garments, rolls of fabric need to be continuously and smoothly unwound by an unwinding device and conveyed to subsequent cutting or sewing processes. During the unwinding process, as the roll diameter continuously decreases, improper tension control can easily lead to fabric stretching, deformation, wrinkling, or even breakage, severely impacting product quality and production efficiency. Therefore, developing a device that can automatically adapt to changes in roll diameter and precisely adjust the unwinding tension in real time is crucial for ensuring the stability of nonwoven garment production and the integrity of the fabric. Utility Model Content

[0003] This utility model provides an automatic unwinding pressure adjustment device for nonwoven garments, which can automatically adjust the unwinding pressure and maintain stable fabric tension.

[0004] To achieve the above objectives, the present invention provides an automatic unwinding pressure adjustment device for nonwoven garments, comprising a mounting frame, a transverse frame, an air shaft, a roll feeding rack, a fabric feed roller, a tension control mechanism, and a transverse mechanism. The tension control mechanism includes a rotating shaft, side plates, a first control roller, a second control roller, a transmission assembly, a detection sensor, and a push rod. The rotating shaft is mounted on the mounting frame. The two side plates are located at both ends of the rotating shaft. The first control roller and the second control roller are located between the two side plates and are symmetrical about the axis of the rotating shaft. One end of the rotating shaft is connected to the detection sensor via the transmission assembly. The push rod is mounted on the mounting frame, and its piston end is connected to either side plate. The air shaft and the roll feeding rack are mounted on the transverse frame. The transverse frame is mounted on the mounting frame via the transverse mechanism.

[0005] Preferably, the device further includes an angle adjustment mechanism; the angle adjustment mechanism is disposed on the transverse frame; the roll material feeding rack is connected to the transverse frame through the angle adjustment mechanism.

[0006] Preferably, the angle adjustment mechanism is an adjustment cylinder; the cylinder end of the adjustment cylinder is connected to the transverse frame, and the piston end of the adjustment cylinder is connected to the roll feeding rack.

[0007] Preferably, one end of the roll feeding rack is provided with an anti-detachment part, and the other end of the roll feeding rack is provided with a connecting part.

[0008] Preferably, the lateral movement mechanism includes a lateral movement cylinder, a linear slide rail, and a slider; the linear slide rail is disposed on the mounting frame; the slider is disposed on the lateral movement frame and slides in cooperation with the linear slide rail; the cylinder end of the lateral movement cylinder is connected to the mounting frame, and the piston end of the lateral movement cylinder is connected to the lateral movement frame.

[0009] Preferably, the fabric guide rollers include a first guide roller, a second guide roller, a third guide roller, a fourth guide roller disposed on the mounting frame, and a fifth guide roller and a sixth guide roller disposed on the transverse frame.

[0010] Preferably, after the fabric is drawn out from the air shaft, it passes sequentially around the sixth pass roller, the fifth pass roller, the fourth pass roller, the second control roller, the third pass roller, the first control roller, the second pass roller, and the first pass roller.

[0011] Preferably, the detection sensor is a torque sensor or an angle sensor.

[0012] Compared with related technologies, the automatic unwinding pressure adjustment device for nonwoven garments provided by this utility model has the following advantages:

[0013] This utility model provides an automatic unwinding pressure adjustment device for nonwoven garments. By incorporating a tension control mechanism, a push rod acts as an actuator, actively driving the control rollers to precisely oscillate around a rotating shaft, thereby changing the fabric wrap angle to adjust tension in real time. A detection sensor acts as a feedback unit, directly or indirectly detecting the force state of the rotating shaft. These two components, together with the control system within the electrical box, form a dynamic closed loop, capable of sensing tension changes in real time and responding quickly to compensate. This fundamentally solves the problem of tension fluctuations caused by changes in roll diameter, ensuring constant tension, no stretching, and no wrinkling of the fabric during the unwinding process, significantly improving product quality.

[0014] This invention utilizes a transverse mechanism to drive the overall movement of a transverse frame integrating a roll feeding rack and an air shaft. This automatically compensates for changes in the fabric path length caused by the reduction in roll diameter during unwinding, maintaining relatively constant path parameters throughout the system and creating a stable working condition for the main tension control mechanism. Simultaneously, the angle adjustment mechanism allows for pitch adjustment of the roll feeding rack, greatly facilitating the loading, centering, and initial fabric threading of heavy rolls, reducing operator workload, and improving production efficiency.

[0015] This utility model integrates the air shaft, the roll material feeding rack, etc. on a horizontally movable frame, which has a compact structure, reasonable layout, and is easy to maintain and operate. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a partial structural schematic diagram of the tension control mechanism of this utility model;

[0018] Figure 3 This is a side view of the entire utility model;

[0019] Figure 4 This is a frontal view of the entire utility model.

[0020] Numbered in the diagram: 1. Mounting frame; 11. First guide roller; 12. Second guide roller; 13. Third guide roller; 14. Fourth guide roller; 15. Fifth guide roller; 16. Sixth guide roller; 2. Tension control mechanism; 21. Rotating shaft; 22. Side plate; 23. First control roller; 24. Second control roller; 25. Transmission assembly; 26. Detection sensor; 27. Push rod; 3. Lateral movement mechanism; 31. Lateral movement cylinder; 311. Hinge frame; 32. Linear slide rail; 33. Slider; 4. Lateral movement frame; 5. Air shaft; 6. Coil material feeding rack; 61. Anti-detachment part; 62. Connecting part; 7. Angle adjustment mechanism; 8. Electrical box. Detailed Implementation

[0021] The above-mentioned and other technical features and advantages of this utility model will be described in more detail below with reference to the accompanying drawings.

[0022] Example 1

[0023] like Figures 1 to 4 As shown, this embodiment provides a basic structure for an automatic unwinding pressure adjustment device for nonwoven garments, which mainly includes an installation frame 1, a tension control mechanism 2, a transverse movement mechanism 3, a transverse movement frame 4, an air shaft 5, a roll feeding rack 6, an angle adjustment mechanism 7, an electrical box 8, and multiple fabric rollers.

[0024] Mounting frame 1 serves as the main support for the entire device. The transverse frame 4 is mounted on top of mounting frame 1 via a transverse mechanism 3. Specifically, the transverse mechanism 3 includes a transverse cylinder 31, a linear slide rail 32, and a slider 33. The linear slide rail 32 is fixed to the top of mounting frame 1, and the slider 33 is fixed to the bottom of transverse frame 4 and slides in cooperation with the linear slide rail 32. The cylinder end of the transverse cylinder 31 is fixed to mounting frame 1 via a bracket, and the piston end of the transverse cylinder 31 is connected to transverse frame 4 via a hinge frame 311. The extension and retraction of the transverse cylinder 31 drives the transverse frame 4 to move horizontally along the linear slide rail 32.

[0025] The roll feeder 6, the air shaft 5, and the angle adjustment mechanism 7 are all mounted on the transverse frame 4. The air shaft 5 is used to fix and support the nonwoven fabric roll. The roll feeder 6 is connected to the transverse frame 4 via the angle adjustment mechanism 7. In this embodiment, the angle adjustment mechanism 7 is an adjusting cylinder, with its cylinder end hinged to the transverse frame 4 and its piston end hinged to the roll feeder 6. By adjusting the extension and retraction of the adjusting cylinder, the roll feeder 6 can be rotated around its hinge point with the transverse frame 4, thereby adjusting its feeding angle to facilitate the loading and initial alignment of the roll. One end of the roll feeder 6 is provided with an anti-slip part 61 to prevent the roll from slipping axially; the other end is provided with a connecting part 62 for connecting to the angle adjustment mechanism 7.

[0026] The tension control mechanism 2 and the electrical box 8 are fixed to the mounting frame 1. The tension control mechanism 2 is the core of this device, including a rotating shaft 21, two side plates 22, a first control roller 23, a second control roller 24, a transmission assembly 25, a detection sensor 26, and a push rod 27. The rotating shaft 21 is rotatably mounted on the mounting frame 1 via bearing seats. The two side plates 22 are fixed to both ends of the rotating shaft 21 and can rotate with the rotating shaft 21. The first control roller 23 and the second control roller 24 are installed parallel between the two side plates 22 and are symmetrically arranged about the axis of the rotating shaft 21. The cylinder of the push rod 27 (which can be electric or pneumatic) is fixed to the mounting frame 1, and its piston end is hinged to either side plate 22. The extension and retraction of the push rod 27 can drive the side plate 22 and the first control roller 23 and the second control roller 24 to swing as a whole around the rotating shaft 21. One end of the rotating shaft 21 is connected to the detection sensor 26 via a transmission assembly 25 (such as a coupling, timing belt, or gear pair). In this embodiment, the detection sensor 26 is an angle sensor used to accurately detect the real-time rotation angle of the rotating shaft 21.

[0027] Multiple fabric guide rollers are used to guide and support the fabric path. In this embodiment, the fabric guide rollers include a first guide roller 11, a second guide roller 12, a third guide roller 13, a fourth guide roller 14, a fifth guide roller 15, and a sixth guide roller 16. Among them, the fifth guide roller 15 and the sixth guide roller 16 are disposed on the transverse frame 4, and the remaining fabric guide rollers are disposed on the mounting frame 1.

[0028] The fabric travels as follows: after being drawn out from the roll on the air shaft 5, it passes through the sixth pass roller 16, the fifth pass roller 15, the fourth pass roller 14, the second control roller 24, the third pass roller 13, the first control roller 23, the second pass roller 12, and the first pass roller 11 in sequence, and is finally conveyed to the subsequent equipment.

[0029] Working Principle: During initial feeding, the angle adjustment mechanism 7 activates, adjusting the roll material feeding rack 6 to a suitable angle, facilitating the operator to place the roll material onto the air shaft 5 and inflate it for fixation. During unwinding, the subsequent equipment pulls the fabric, and the fabric tension acts on the first control roller 23 and the second control roller 24, generating a torque that causes the side plate 22 to rotate around the shaft 21. The angle sensor detects the angle of the shaft 21, indirectly reflecting the current fabric tension. The control system in the electrical box 8 compares the detected angle signal with a preset tension-angle model. If the tension deviates from the set value, the control system instructs the push rod 27 to activate, pushing or pulling the side plate 22, changing the position of the first control roller 23 and the second control roller 24, thereby changing the wrap angle of the fabric on both rollers, achieving real-time, automatic compensation and adjustment of the tension, keeping the tension constant. Simultaneously, as the roll diameter decreases, the transverse movement mechanism 3 can drive the entire transverse movement frame 4 to move in the unwinding direction, compensating for changes in the fabric path caused by changes in roll diameter, keeping the total length of the fabric path essentially constant, and making tension control more precise.

[0030] Example 2

[0031] Based on Example 1, this embodiment upgrades the core detection and feedback system of the tension control mechanism 2 to achieve more direct and precise tension closed-loop control.

[0032] The main difference between this embodiment and Embodiment 1 is that the angle sensor in the tension control mechanism 2 is replaced with a torque sensor. The torque sensor is preferably a dynamic torque sensor, which is coaxially connected to one end of the rotating shaft 21 via the transmission assembly 25, and is used to directly and in real-time measure the torque value borne by the rotating shaft 21.

[0033] The remaining structure, connection relationships, and arrangement are the same as in Example 1.

[0034] Working principle:

[0035] The core of this embodiment lies in the introduction of a direct tension detection mechanism. When the fabric passes through the first control roller 23 and the second control roller 24 with a certain tension T, the frictional force generated by the fabric on the two rollers will form a resultant torque M on the side plate 22 that causes the rotating shaft 21 to rotate. According to the principles of mechanics, when the system is in equilibrium, this torque M is balanced with the torque generated by the thrust of the push rod 27 acting on the side plate 22, and the value of the torque M is directly and linearly determined by the fabric tension T and the geometric dimensions of the roller system.

[0036] The specific workflow is as follows:

[0037] Signal acquisition: The torque sensor detects the torque signal of the rotating shaft 21 in real time and transmits the electrical signal, which represents the current actual tension, to the control system in the electrical box 8.

[0038] Signal processing and comparison: The control system receives the torque signal and compares it in real time with the target torque value corresponding to the internally preset target tension value.

[0039] Closed-loop control: If the detected actual torque is less than the target torque (indicating low tension), the control system immediately commands push rod 27 to extend, pushing side plate 22 to swing in the direction of increasing fabric wrap angle. This action immediately increases the tortuous path and frictional resistance of the fabric, thereby increasing tension, which is reflected in the increased torque of shaft 21. The torque sensor continuously feeds back the increased torque value until it matches the target torque value, at which point push rod 27 stops moving. Conversely, if the actual torque is greater than the target torque (high tension), the control system commands push rod 27 to retract, causing side plate 22 to swing in the opposite direction, reducing the wrap angle to decrease tension, until the torque returns to the set value.

[0040] Since the torque sensor directly detects the torque generated by the tension, it eliminates the model error and hysteresis caused by indirect calculation through angle, realizing direct control of the fabric tension, with faster response speed and significantly improved control accuracy.

[0041] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An automatic unwinding pressure adjustment device for nonwoven garments, characterized in that: The device includes a mounting frame, a transverse frame, an air shaft, a roll material feeder, a fabric conveyor roller, a tension control mechanism, and a transverse mechanism. The tension control mechanism includes a rotating shaft, side plates, a first control roller, a second control roller, a transmission assembly, a detection sensor, and a push rod. The rotating shaft is mounted on the mounting frame. Two side plates are located at both ends of the rotating shaft. The first and second control rollers are located between the two side plates and are symmetrical about the axis of the rotating shaft. One end of the rotating shaft is connected to the detection sensor via the transmission assembly. The push rod is mounted on the mounting frame, and its piston end is connected to either side plate. The air shaft and the roll material feeder are mounted on the transverse frame. The transverse frame is mounted on the mounting frame via the transverse mechanism.

2. The automatic unwinding pressure adjustment device for nonwoven garments according to claim 1, characterized in that: The device also includes an angle adjustment mechanism; the angle adjustment mechanism is disposed on the transverse frame; the roll material feeding rack is connected to the transverse frame through the angle adjustment mechanism.

3. The automatic unwinding pressure adjustment device for nonwoven garments according to claim 2, characterized in that: The angle adjustment mechanism is an adjustment cylinder; the cylinder end of the adjustment cylinder is connected to the transverse frame, and the piston end of the adjustment cylinder is connected to the roll feeding rack.

4. The automatic unwinding pressure adjustment device for nonwoven garments according to claim 1, characterized in that: One end of the roll material feeding rack is provided with an anti-detachment part, and the other end of the roll material feeding rack is provided with a connecting part.

5. The automatic unwinding pressure adjustment device for nonwoven garments according to claim 1, characterized in that: The lateral movement mechanism includes a lateral movement cylinder, a linear slide rail, and a slider; the linear slide rail is mounted on the mounting frame; the slider is mounted on the lateral movement frame and slides in cooperation with the linear slide rail; the cylinder end of the lateral movement cylinder is connected to the mounting frame, and the piston end of the lateral movement cylinder is connected to the lateral movement frame.

6. The automatic unwinding pressure adjustment device for nonwoven garments according to claim 1, characterized in that: The fabric guide rollers include a first guide roller, a second guide roller, a third guide roller, and a fourth guide roller disposed on the mounting frame, and a fifth guide roller and a sixth guide roller disposed on the transverse frame.

7. The automatic unwinding pressure adjustment device for nonwoven garments according to claim 6, characterized in that: After the fabric is drawn out from the air shaft, it passes sequentially around the sixth pass roller, the fifth pass roller, the fourth pass roller, the second control roller, the third pass roller, the first control roller, the second pass roller, and the first pass roller.

8. The automatic unwinding pressure adjustment device for nonwoven garments according to claim 1, characterized in that: The detection sensor is a torque sensor or an angle sensor.

Images