Nonwoven fabric production apparatus and method of processing the same

Abstract

The application is suitable for the field of non-woven fabric processing technology, and provides a non-woven fabric preparation device, which comprises a supporting leg assembly, the supporting leg assembly comprises a flexible abutting plate and a plurality of lifting supporting columns, the plurality of lifting supporting columns are distributed in a linear array along the flexible abutting plate, one end of the lifting supporting column is installed on the flexible abutting plate, and the other end is installed on the side wall of the stand column; the lifting supporting column is used for adjusting the position of the flexible abutting plate in the inside of the winding drum through stretching and retracting, and the flexible abutting plate is used for adaptively abutting on the inner wall with different radii of the winding drum with different diameters; good adaptability and adjustability are achieved, the adaptability and the fit degree with the winding drum with different diameters are improved; on the basis that the flexible abutting plate provides uniform and stable supporting force for the inner wall of the winding drum, precise locking is achieved, and the extrusion force borne by the wall of the winding drum can be borne in subsequent high-strength and high-speed winding of the non-woven fabric.

Description

Technical Field

[0001] This invention relates to the field of nonwoven fabric processing technology, and in particular to a nonwoven fabric preparation apparatus and processing method. Background Technology

[0002] Nonwoven fabric, also known as non-woven cloth or non-woven material, is a type of fabric formed directly through fiber bonding without the need for traditional spinning and weaving processes. It primarily uses chemical fibers such as polyester, polypropylene, and others, and also includes natural fibers. Short fibers or filaments are oriented or randomly arranged to form a web structure, which is then reinforced using mechanical methods (needle punching, hydroentangling, etc.), thermal bonding, or chemical bonding. Compared to woven and knitted fabrics, nonwoven fabrics break through traditional textile principles, featuring shorter processing times, faster production speeds, and lower costs. They also possess excellent properties such as breathability, moisture resistance, lightweight, non-toxicity, odorlessness, and biodegradability. Products are divided into two main categories: disposable and durable, and are widely used in medical and health applications (such as surgical gowns and masks), industrial filtration, agricultural coverings, household goods, and packaging materials.

[0003] In existing nonwoven fabric manufacturing processes, the production steps typically include raw material preparation, fiber opening and carding, web formation, reinforcement, and post-processing. Specifically, web formation processes can be categorized into dry web formation, wet web formation, and spunbond web formation (such as spunbond and meltblown processes) based on raw material and product requirements. Reinforcement processes are classified into thermal bonding reinforcement, needle punching reinforcement, hydroentangling reinforcement, and chemical bonding based on the fiber bonding method. Correspondingly, nonwoven fabric manufacturing equipment mainly includes: opening machines for breaking up fiber clumps, carding machines for aligning fibers, web forming machines (such as air-jet web forming machines or carding and web laying equipment) for laying uniform fiber webs, thermal rolling mills, hydroentangling machines, or needle punching machines for web reinforcement, and winding devices for winding finished nonwoven fabrics. Among these, the winding device, as a key piece of equipment at the end of the nonwoven fabric production line, is responsible for winding the formed nonwoven fabric into rolls according to a certain tension and specifications. Its performance directly affects the product's packaging, transportation, and subsequent processing.

[0004] Due to the diversity of production processes and product specifications, nonwoven fabric preparation often requires the use of winding drums of different diameters, necessitating a winding device with good adaptability and adjustability. To address this issue, some existing technologies incorporate retractable support structures within the winding mechanism to accommodate drums of varying diameters. For instance, patent application number 202111602752.1, entitled "A Nonwoven Fabric Preparation Device and Its Working Method," discloses a winding mechanism that, through the inclusion of fixed components such as a first arc-shaped rod, a second arc-shaped rod, a third arc-shaped rod, a fourth arc-shaped rod, and gear transmission, allows the winding mechanism to be adjusted to match the diameter of different winding drums. However, while this solution offers diameter adjustment, the structure directly contacting the inner wall of the winding drum is a fixed-shape connecting block. Since winding drums of different diameters have different inner wall curvature radii, the fixed-shape connecting block struggles to adapt to the varying curvatures of the inner walls of winding drums of different diameters. This results in the connecting block only making line or point contact with the inner wall of the winding drum, failing to achieve adequate surface fit. This contact method causes stress concentration, leading to excessive localized stress on the inner wall of the winding drum during subsequent high-intensity, high-speed winding of the nonwoven fabric. This can easily cause the winding drum to deform or even break. Furthermore, due to the limited contact area, the frictional transmission between the winding drum and the winding mechanism is insufficient, making slippage prone to occur during winding. This affects the uniformity and tension stability of the winding, resulting in quality problems such as uneven tension and misaligned end faces in the finished nonwoven fabric roll. Therefore, it is urgent to improve existing nonwoven fabric preparation equipment and its winding mechanism to enhance their compatibility and fit with winding drums of different diameters. Summary of the Invention

[0005] The purpose of this invention is to provide a nonwoven fabric preparation apparatus and processing method, aiming to solve the problems in the background art.

[0006] Specifically: The nonwoven fabric preparation apparatus includes a winding assembly for winding nonwoven fabric during the nonwoven fabric preparation process; the winding assembly includes a rotating shaft, a column, and multiple support leg assemblies. The column is rotatably mounted on a drive motor via the rotating shaft, and the multiple support leg assemblies are distributed in a ring around the column and directly perpendicular to the side wall of the column; the winding assembly is distributed and supported inside the winding drum by the multiple support leg assemblies, and the winding drum is used to wind nonwoven fabric; the support leg assemblies include a flexible abutment plate and multiple lifting support columns, which are distributed in a linear array along the flexible abutment plate. One end of each lifting support column is mounted on the flexible abutment plate, and the other end is mounted on the side wall of the column; the lifting support columns are used to adjust the position of the flexible abutment plate inside the winding drum by telescoping, and the flexible abutment plate is used to adaptably abut against the inner wall of the winding drum with different curvatures of different diameters.

[0007] Based on the above technical solutions, the present invention also provides the following optional technical solutions:

[0008] In one alternative: an inner flexible abutment plate is installed inside the flexible abutment plate, the inner flexible abutment plate including an abutment plate and an airbag cushion, the abutment plate being installed inside the airbag cushion; one end of the lifting support column is inserted into the airbag cushion and directly installed on the abutment plate, for providing stable support for the abutment plate and the airbag cushion.

[0009] The airbag cushion includes a first airbag cushion for placing a backing plate, the outer wall of which is directly and fixedly connected to the inner wall of the first airbag cushion; the airbag cushion also includes a second airbag cushion installed below the first airbag cushion; the first and second airbag cushions are independent of each other, and the second airbag cushion is connected to an external exhaust fan through a connecting pipe for inflating the second airbag cushion; a solenoid valve is installed on the connecting pipe for deflating the second airbag cushion.

[0010] The abutment plate includes multiple unit abutment plate bodies, which are elastically rotatably connected to each other; each unit abutment plate body includes a plate body and a connecting plate, the plate body being strip-shaped; two connecting plates are provided, respectively distributed at both ends of the plate body; the connecting plates are elastically rotatably connected to the plate body.

[0011] Two rotating slots are respectively opened at both ends of the plate. Each rotating slot has an insertion hole. The connecting plate is inserted into the insertion hole by rotating through the positioning shaft. Multiple torsion springs are installed inside the insertion hole in conjunction with the positioning shaft. The multiple torsion springs are distributed at equal intervals along the positioning shaft.

[0012] The connecting plate is made of magnetic metal material, and its outer wall is attached to the limiting side wall of the rotating groove. Multiple sets of electromagnetic coils are laid on the limiting side wall. The switching on and off of the electromagnetic coils is used to determine whether the limiting side wall is magnetic.

[0013] In one alternative: the lifting support column includes a fixed support column and a movable support column, one end of the movable support column is slidably mounted on the fixed support column, and the other end is mounted on a flexible abutment plate; the end of the fixed support column away from the movable support column is mounted on the side wall of the column.

[0014] The fixed support column includes a U-shaped support plate, which is installed on the side wall of the column. An electric telescopic rod is fixed inside the U-shaped support plate, and a limit groove is opened on one side of the U-shaped support plate.

[0015] The movable support column includes an L-shaped support plate and a support cross plate. One end of the L-shaped support plate is fixed to the electric telescopic rod. A limit strip is fixed on the side of the L-shaped support plate. The limit strip is slidably assembled in the limit groove. The limit strip is made of magnetic metal material. Multiple sets of electromagnetic coils are laid inside the limit groove. When the electromagnetic coils are energized and de-energized, the limit groove is magnetized.

[0016] Another object of the present invention is to provide a processing method for the nonwoven fabric preparation apparatus described above, comprising the following steps:

[0017] Step 1: Initial support and multi-point dispersed abutment

[0018] The take-up drum is fitted onto the outside of the take-up assembly, using the column and its circumferentially distributed support leg assemblies as a frame; the drive motor is started for low-speed pre-rotation or manual adjustment, so that the multiple support leg assemblies are initially extended under the drive of the column, and dispersed and abutted against the inner wall of the take-up drum from multiple directions to form multi-point dispersed pre-support.

[0019] Step 2: Radial expansion and contraction coarse adjustment to fit the drum diameter

[0020] Before the support foot assembly contacts the inner wall of the winding drum or when adjustment is needed, the second electromagnetic coil inside each lifting support column is de-energized; at this time, the limiting groove loses its magnetism, releasing the lock between the fixed support column and the moving support column; then the electric telescopic rod is activated, driving the fixed support column and the moving support column to slide linearly out of alignment, thereby causing the flexible abutment plate to move radially, initially adjusting the radial position of the flexible abutment plate inside the winding drum to adapt to different diameters of the winding drum; after the position is adjusted to the correct position, the second electromagnetic coil is energized again, making the limiting groove magnetic again, locking the fixed support column and the moving support column at the current telescopic length;

[0021] Step 3: Fine-tune the curvature to achieve a perfect fit between the curved surfaces.

[0022] Before or during the process of the flexible abutment plate being extended outward to abut against the inner wall of the winding drum, the electromagnetic coil inside the flexible abutment plate is de-energized. At this time, the limiting sidewall loses its magnetism and releases the locking of the connecting plate. As the abutment plate approaches the curved surface of the inner wall of the winding drum, the multiple unit abutment plates that make up the abutment plate rotate relatively freely on the plate body through the connecting plate. The connecting plate drives the positioning shaft to rotate, and at the same time drives the multiple torsion springs inside it to twist, thereby causing the entire abutment plate to undergo adaptive bending deformation. After the bending deformation makes the outer contour of the abutment plate completely conform to the specific curvature of the inner wall of the winding drum, the electromagnetic coil is immediately energized again, so that the limiting sidewall regains its magnetism and firmly locks the relative angle of the connecting plate and each unit abutment plate body, so that the flexible abutment plate can fully conform to the inner wall with different diameters and curvatures with the maximum contact surface.

[0023] Step 4: Inflation, Expansion, Secondary Shaping, and Precise Locking

[0024] After completing the aforementioned mechanical expansion, contraction, bonding, and locking, the exhaust fan is activated to inflate the second airbag pad built into the inner flexible abutment plate. During the inflation process, the continuously expanding second airbag pad applies uniform air pressure from the inside out, squeezing the already bonded inner flexible abutment plate and performing secondary expansion, shaping, and positioning. This air pressure not only fills any possible microscopic gaps but also locks in and maintains the supporting shape of the inner flexible abutment plate.

[0025] Step 5: High-torque drive and stable winding

[0026] After confirming that all support leg components have been firmly secured to the inner wall of the winding drum through a dual mechanism of mechanical bonding and air pressure shaping and locking, the drive motor is started. The drive motor transmits power to the column and all support leg components on it through the rotating shaft. Utilizing the huge friction generated by the large-area curved surface bonding and high-pressure extrusion between the flexible abutment plate and the inner wall of the winding drum, the winding drum is rotated synchronously, and the high-tension, high-speed nonwoven fabric smooth winding operation begins.

[0027] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0028] 1. The upright column 200 is supported by multiple support foot assemblies 300, which are distributed and abut against the inner wall of the winding drum 400, providing uniform support force at multiple points. During this process, the support foot assembly 300 uses the lifting support column 310 to adjust the position of the flexible abutment plate 320 inside the winding drum 400 by telescopic adjustment, thus flexibly adapting to different diameters. The flexible abutment plate 320 can abut against the inner wall of the winding drum 400 with different curvatures of different diameters through its own flexibility. This allows the flexible abutment plate 320 to fully adapt and stably fit against the curved surface of the inner wall of the winding drum 400 with different curvatures of different diameters with the maximum contact surface, thus providing good performance. The adaptability and adjustability of the flexible abutment plate 320 improve its compatibility and fit with winding drums of different diameters. Precise locking is achieved by the flexible abutment plate 320 providing uniform and stable support to the inner wall of the winding drum 400. This helps to withstand the compressive force on the drum wall during subsequent high-intensity, high-speed winding of the nonwoven fabric, preventing deformation or even breakage of the winding drum 400. Furthermore, it increases the frictional transmission force between the winding drum 400 and the winding assembly, preventing slippage during winding and ensuring uniformity and tension stability. This results in improved quality, such as uniform tension and neat end faces in the finished nonwoven fabric roll.

[0029] 2. While the flexible abutment plate 320 provides uniform and stable support to the inner wall of the winding drum 400 using the inner flexible abutment plate 330, the exhaust fan is used to inflate the second airbag pad 352. After the second airbag pad 352 expands, it will be repositioned and shaped on the basis of the inner flexible abutment plate 330 adapting to the inner wall of the winding drum 400. This helps the second airbag pad 352 maintain the support shape of the inner flexible abutment plate 330 and improves the support stability of the inner flexible abutment plate 330.

[0030] 3. During the process of multiple support foot assemblies 300 being dispersed and abutting against the inner wall of the winding drum 400, firstly, the limiting position of the fixed support column 311 and the movable support column 312 is released by de-energizing the second electromagnetic coil, and the electric telescopic rod 3112 is activated to realize the radial misalignment and extension of the lifting support column 310, completing the coarse adjustment of the position of the flexible abutment plate 320; at the same time, the limitation of the limiting side wall on the connecting plate 343 is released by de-energizing the first electromagnetic coil, allowing each unit abutment plate 341 to rotate freely under the action of the torsion spring, causing the abutment plate 340 to form an adaptive bending deformation, realizing the fine adjustment of the arc surface; the two are sequential or synchronous. After deformation is completed, electromagnetic coil 2 and electromagnetic coil 1 are energized and locked respectively; the radial expansion coarse adjustment and conformal bending fine adjustment are seamlessly linked under the synergy of magnetic instantaneous unlocking, so that the flexible abutment plate 320 can directly transition from a free adjustment state to a rigid support state that is completely matched and locked with the inner wall of the winding drum 400 of different diameters. This not only breaks the limitation of traditional expansion structures that can only contact with a fixed shape, but also avoids the contradiction that rigid support and flexible adaptation cannot be achieved at the same time. Thus, even when winding at extremely high speed, the maximum contact area and no stress concentration can still be guaranteed, fundamentally preventing the winding drum from deforming and breaking.

[0031] 4. While the flexible abutment plate 320 bends by rotating its own unit abutment plate 341 and uses the inner flexible abutment plate 330 to provide uniform and stable support for the inner wall of the winding drum 400, the exhaust fan is activated to inflate the built-in second airbag pad 352, causing the airbag to expand and compress the already bonded inner flexible abutment plate 330. The secondary expansion of the second airbag pad 352 is not simply to increase the support force, but rather, based on the initial bonding of the inner flexible abutment plate 330, it uses uniform air pressure to solidify the flexible structure into a support shape that is precisely consistent with the inner wall of the winding drum 400, forming an effect similar to liquid filling followed by solidification and locking. This secondary positioning and shaping, which involves bonding first and then expanding, not only eliminates any residual micro-gaps, but also gives the support structure the ability to follow up and resist vibration, effectively suppressing centrifugal deformation and slippage during high-speed winding, ensuring that the winding tension is always uniform and stable, and significantly improving the neatness of the finished roll end face. This is something that cannot be achieved by single mechanical bonding or single air-filled support.

[0032] 5. Multiple support foot assemblies 300 are distributed circumferentially. Each support foot assembly 300 independently controls the radial extension and retraction of the lifting support column 310 to adapt to the diameter of the winding drum 400. The flexible abutment plates 320 driven by each component independently bend to conform to the local inner wall curvature of their respective positions. Finally, the second airbag 352 is inflated to apply uniform air pressure to each of the conforming inner flexible abutment plates 330 from the inside. The adaptation at each point is no longer to the same theoretical arc surface, but to the complex conditions of the actual roundness error and local unevenness of the winding drum 400. The inner wall; through a closed loop of single-point independent conformal and global air pressure uniformity, the device constructs an automatically pressure-equalizing circumferential support system inside the winding drum 400, making the pressure at all contact points nearly equal. This easily compensates for manufacturing defects in the winding drum 400 itself, generating a large clamping friction force without damaging the winding drum 400. This allows for the use of thin-walled, low-cost winding drums and supports wider and faster winding, resulting in significant simultaneous benefits in reducing nonwoven fabric production costs and improving product quality. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the nonwoven fabric preparation device of the present invention;

[0034] Figure 2 This is a demonstration diagram showing the use of a winding drum in the nonwoven fabric preparation device of the present invention during the preparation process;

[0035] Figure 3 for Figure 1 Schematic diagram of the middle support leg assembly;

[0036] Figure 4 for Figure 3 Schematic diagram of the structure of the central lifting support column;

[0037] Figure 5 for Figure 4 Schematic diagram of the central support column;

[0038] Figure 6 for Figure 4 Structural diagram of the central dynamic support column;

[0039] Figure 7 This is a schematic diagram of the structure of the inner flexible abutment plate in this invention;

[0040] Figure 8 for Figure 7 Schematic diagram of the structure of the central airbag cushion;

[0041] Figure 9 for Figure 7 Schematic diagram of the middle abutment plate;

[0042] Figure 10 for Figure 9Schematic diagram of the structure of the middle unit's abutment plate;

[0043] Figure 11 for Figure 10 A schematic diagram of the middle plate structure.

[0044] In the diagram: 100-rotating shaft, 200-column, 300-support foot assembly, 400-rewinding drum; 310-lifting support column, 311-fixed support column, 312-moving support column, 320-flexible abutment plate, 330-inner flexible abutment plate, 340-abutment plate, 341-unit abutment plate, 342-plate, 343-connecting plate, 344-limiting sidewall, 345-rotating groove, 346-intercalation hole, 350-airbag cushion, 351-first airbag cushion, 352-second airbag cushion, 3111-limiting groove, 3112-electric telescopic rod, 3113-U-shaped support plate, 3121-support cross plate, 3122-limiting strip, 3123-L-shaped support plate. Detailed Implementation

[0045] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0046] The specific implementation of the present invention will be described in detail below with reference to specific embodiments.

[0047] In embodiments of the present invention, such as Figures 1-3 , Figure 7 - As shown: A nonwoven fabric preparation apparatus, including a winding assembly for winding nonwoven fabric during the nonwoven fabric preparation process; the winding assembly includes a rotating shaft 100, a column 200, and multiple support leg assemblies 300. The column 200 is rotatably mounted on a drive motor via the rotating shaft 100 (the rotating shaft 100 is rotatably mounted on the output shaft of the drive motor via a coupling). The multiple support leg assemblies 300 are distributed in a ring around the column 200 and are directly and perpendicularly installed to the side wall of the column 200; the winding assembly is distributedly supported inside a winding drum 400 by the multiple support leg assemblies 300, and the winding drum 400 is used to wind up the nonwoven fabric.

[0048] Therefore, during the nonwoven fabric preparation process, the drive motor is started, and the drive motor transmits its output power to the column 200 and multiple support foot assemblies 300 through the rotating shaft 100. The column 200 and multiple support foot assemblies 300 synchronously drive the winding drum 400 to rotate, thereby completing the winding of the nonwoven fabric.

[0049] The support foot assembly 300 includes a flexible abutment plate 320 and a plurality of lifting support columns 310. The plurality of lifting support columns 310 are arranged in a straight array along the flexible abutment plate 320. One end of the lifting support column 310 is installed on the flexible abutment plate 320, and the other end is installed on the side wall of the column 200.

[0050] The lifting support column 310 is used to adjust the position of the flexible abutment plate 320 inside the winding drum 400 by telescopic movement. The flexible abutment plate 320 is used to adapt to abut against the inner wall of the winding drum 400 with different curvatures of different diameters.

[0051] Therefore, the column 200 is distributed and abuts against the inner wall of the winding drum 400 through multiple support foot assemblies 300, achieving multi-point distributed and uniform support force. During this process, the support foot assembly 300 uses the lifting support column 310 to adjust the position of the flexible abutment plate 320 inside the winding drum 400 through telescopic adjustment, flexibly adapting to different diameters. The flexible abutment plate 320, through its own flexibility, abuts against the inner walls of winding drums 400 with different curvatures of different diameters. This ensures that the flexible abutment plate 320 fully and stably conforms to the curved surfaces of the inner walls of winding drums 400 with different curvatures of different diameters with maximum contact surface, giving it good... Good adaptability and adjustability improve its compatibility and fit with winding drums of different diameters; the flexible abutment plate 320 provides uniform and stable support for the inner wall of the winding drum 400 and is precisely locked, which is beneficial for withstanding the extrusion pressure on the drum wall during subsequent high-intensity, high-speed winding of nonwoven fabric, and avoids deformation or even breakage of the winding drum 400; on the other hand, it helps to increase the frictional transmission force between the winding drum 400 and the winding assembly, and avoids slippage during the winding process, which affects the uniformity and tension stability of the winding; thus improving the quality of the finished nonwoven fabric roll, such as uniform tightness and neat end face.

[0052] In embodiments of the present invention, such as Figure 3 and Figure 7 As shown: The flexible abutment plate 320 is internally equipped with an inner flexible abutment plate 330, which includes an abutment plate 340 and an airbag cushion 350. The abutment plate 340 is installed inside the airbag cushion 350. One end of the lifting support column 310 is inserted into the airbag cushion 350 and directly installed on the abutment plate 340 to provide stable support for the abutment plate 340 and the airbag cushion 350.

[0053] Further: such as Figure 7 and Figure 8 As shown: The airbag cushion 350 includes a first airbag cushion 351, which is used to place the abutment plate 340. The outer wall of the abutment plate 340 is directly and fixedly connected to the inner wall of the first airbag cushion 351.

[0054] The airbag cushion 350 also includes a second airbag cushion 352, which is installed below the first airbag cushion 351. The first airbag cushion 351 and the second airbag cushion 352 are independent of each other. The second airbag cushion 352 is connected to an external exhaust fan through a connecting pipe. The exhaust fan is used to inflate the second airbag cushion 352. A solenoid valve is provided on the connecting pipe. The solenoid valve is used to deflate the second airbag cushion 352.

[0055] Therefore, while the flexible abutment plate 320 provides uniform and stable support to the inner wall of the winding drum 400 using the inner flexible abutment plate 330, the exhaust fan inflates the second airbag pad 352. After the second airbag pad 352 expands, it will be repositioned and shaped based on the inner flexible abutment plate 330 adapting to the inner wall of the winding drum 400. This helps the second airbag pad 352 maintain the support shape of the inner flexible abutment plate 330 and improves the support stability of the inner flexible abutment plate 330.

[0056] Of course, as is well known to those skilled in the art, the solenoid valve and the exhaust fan of the present invention also require power to function properly, and as is well known to those skilled in the art, the circuits for providing such power are commonplace and are all conventional means or common knowledge, and will not be described in detail here. Those skilled in the art can make any selections according to their needs or convenience.

[0057] like Figures 9-11 As shown: The abutment plate 340 includes multiple unit abutment plate bodies 341, which are elastically rotatably connected to each other;

[0058] The unit abutment plate 341 includes a plate 342 and a connecting plate 343. The plate 342 is strip-shaped. There are two connecting plates 343, which are distributed at both ends of the plate 342. The connecting plates 343 are elastically rotatably connected to the plate 342 (one end of the lifting support column 310 is installed on one of the unit abutment plates 341 of the abutment plate 340, and the other end is installed on the side wall of the column 200).

[0059] like Figure 10 and Figure 11 As shown: Two rotating slots 345 are respectively opened at both ends of the plate 342. Each rotating slot 345 has an insertion hole 346. The connecting plate 343 is inserted into the insertion hole 346 by rotating through the positioning shaft. Multiple torsion springs are assembled inside the insertion hole 346 in conjunction with the positioning shaft. The multiple torsion springs are distributed at equal intervals along the positioning shaft.

[0060] like Figure 10 and Figure 11As shown: The connecting plate 343 is made of magnetic metal material. The outer wall of the connecting plate 343 is attached to the limiting side wall 344 of the rotating groove 345. Multiple sets of electromagnetic coils are laid on the limiting side wall 344. The switching on and off of the electromagnetic coils is used to determine whether the limiting side wall 344 is magnetic.

[0061] Therefore, during the process of the flexible abutment plate 320 abutting against the inside of the winding drum 400, when the electromagnetic coil is de-energized, the limiting sidewall 344 releases the limiting of the connecting plate 343. Multiple unit abutment plates 341 rotate on the plate 342 via the connecting plate 343. This causes the connecting plate 343 to rotate the positioning shaft and simultaneously cause multiple torsion springs to twist, resulting in mutual rotation among the multiple unit abutment plates 341. This allows the abutment plate 340 to undergo adaptive bending deformation, allowing the multiple unit abutment plates 341 to adapt to the turning process. After the rotation, the electromagnetic coil is energized again, and the limiting sidewall 344 is magnetized. The limiting sidewall 344 then limits the connecting plate 343 again, so that the flexible abutment plate 320 can abut against the inner wall of the winding drum 400 with different diameters and different curvatures through its own flexible adaptability. This ensures that the flexible abutment plate 320 fully adapts and stably fits the curved surface of the inner wall of the winding drum 400 with different diameters and different curvatures with the maximum contact surface, so that it has good adaptability and adjustability, and improves its compatibility and fit with winding drums of different diameters.

[0062] In embodiments of the present invention, such as Figure 4 As shown: The lifting support column 310 includes a fixed support column 311 and a movable support column 312. One end of the movable support column 312 is slidably mounted on the fixed support column 311, and the other end is mounted on the flexible abutment plate 320. The end of the fixed support column 311 away from the movable support column 312 is mounted on the side wall of the column 200.

[0063] like Figure 4 and Figure 5 As shown: The fixed support column 311 includes a U-shaped support plate 3113, which is installed on the side wall of the column 200. An electric telescopic rod 3112 is fixed inside the U-shaped support plate 3113, and a limit groove 3111 is opened on one side of the U-shaped support plate 3113.

[0064] like Figure 4 and Figure 6As shown: The movable support column 312 includes an L-shaped support plate 3123 and a support cross plate 3121. One end of the L-shaped support plate 3123 is fixed to the electric telescopic rod 3112. A limit strip 3122 is fixed on the side of the L-shaped support plate 3123. The limit strip 3122 is slidably assembled in the limit groove 3111. The limit strip 3122 is made of magnetic metal material. Multiple sets of electromagnetic coils are laid inside the limit groove 3111. The energization and de-energization of the electromagnetic coils determine whether the limit groove 3111 is magnetized.

[0065] Therefore, the support foot assembly 300 activates multiple lifting support columns 310 of the flexible abutment plate 320 on one side. The lifting support column 310 de-energizes the electromagnetic coil 2. After the limiting groove 3111 loses its magnetism, the limiting between the fixed support column 311 and the moving support column 312 is released. The lifting support column 310 activates the electric telescopic rod 3112. The electric telescopic rod 3112 drives the fixed support column 311 and the moving support column 312 to slide out of position through extension and retraction. This allows the support foot assembly 300 to use the lifting support column 310 to adjust the position of the flexible abutment plate 320 inside the winding drum 400 to flexibly adapt to different diameters. Then, the electromagnetic coil 2 is energized again, the limiting groove 3111 becomes magnetic, and the fixed support column 311 and the moving support column 312 are re-limited.

[0066] Of course, as is well known to those skilled in the art, the electromagnetic coil one and electromagnetic coil two of the present invention also need to be supplied with power to enable them to work normally. And as is well known to those skilled in the art, the circuits for supplying power are commonplace and are all conventional means or common knowledge, so they will not be described in detail here. Those skilled in the art can make any selections according to their needs or convenience.

[0067] In summary: During the nonwoven fabric preparation process, the upright column 200 is dispersed against the inner wall of the winding drum 400 by multiple support foot assemblies 300, achieving multi-point dispersion to provide uniform support force. During this process, the support foot assembly 300 activates multiple lifting support columns 310 on one side of the flexible abutment plate 320. The lifting support column 310 de-energizes the electromagnetic coil, and after the limiting groove 3111 loses its magnetism, the limiting between the fixed support column 311 and the movable support column 312 is released. The lifting support column 310 then activates the electric telescopic rod 3112. The electric telescopic rod 3112, through extension and retraction, causes the fixed support column 311 and the movable support column 312 to slide out of alignment, completing the adjustment of the flexible abutment plate 320 by the lifting support column 310 using the extension and retraction of the support foot assembly 300. 0. Inside the winding drum 400, the position flexibly adapts to different diameters; the electromagnetic coil is energized again, the limiting groove 3111 becomes magnetic, and the fixed support column 311 and the moving support column 312 are repositioned; during the process of the flexible abutment plate 320 abutting against the inside of the winding drum 400, the electromagnetic coil is de-energized, releasing the limiting side wall 344 from the limiting plate 343. Multiple unit abutment plates 341 rotate on plate 342 through the connecting plate 343. In this way, the connecting plate 343 drives the positioning shaft to rotate and drives multiple torsion springs to twist, completing the mutual rotation of multiple unit abutment plates 341, allowing the abutment plate 340 to form an adaptive bending deformation. After the multiple unit abutment plates 341 adapt and flip, When the electromagnetic coil is energized again, the limiting sidewall 344 is magnetized, and the limiting sidewall 344 re-limits the connecting plate 343, enabling the flexible abutment plate 320 to abut against the inner walls of winding drums 400 of different diameters with different curvatures through its own flexibility. This ensures that the flexible abutment plate 320 fully and stably conforms to the curved surfaces of the inner walls of winding drums 400 of different diameters with maximum contact surface, giving it good adaptability and adjustability, and improving its compatibility and fit with winding drums of different diameters. While the flexible abutment plate 320 provides uniform and stable support to the inner wall of the winding drum 400 using the inner flexible abutment plate 330, a blower is used to inflate the second airbag cushion 352. After the second airbag cushion 352 expands... The secondary positioning and shaping process is performed on the inner flexible abutment plate 330, which adapts to the inner wall of the winding drum 400. This helps the second airbag cushion 352 maintain the supporting shape of the inner flexible abutment plate 330 and improves the support stability of the inner flexible abutment plate 330. After the flexible abutment plate 320 provides uniform and stable support to the inner wall of the winding drum 400, it is precisely locked. This helps to withstand the compressive force on the drum wall of the winding drum 400 during subsequent high-strength and high-speed winding of nonwoven fabric, and avoids the winding drum 400 from being easily deformed or even broken. On the other hand, it helps to increase the frictional transmission force between the winding drum 400 and the winding assembly, and avoids slippage during the winding process, which would affect the uniformity and tension stability of the winding.This improves the quality of the finished nonwoven fabric roll, resulting in uniform tension and neat end faces. The drive motor is activated, transmitting its output power through the rotating shaft 100 to the column 200 and multiple support leg assemblies 300. The column 200 and support leg assemblies 300 simultaneously drive the winding drum 400 to rotate, completing the winding of the nonwoven fabric.

[0068] During the process of multiple support foot assemblies 300 abutting against the inner wall of the winding drum 400, firstly, the limiting position of the fixed support column 311 and the moving support column 312 is released by de-energizing the second electromagnetic coil, and the electric telescopic rod 3112 is activated to realize the radial misalignment and extension of the lifting support column 310, completing the coarse adjustment of the position of the flexible abutment plate 320; at the same time, the limitation of the limiting side wall on the connecting plate 343 is released by de-energizing the first electromagnetic coil, allowing each unit abutment plate 341 to rotate freely under the action of the torsion spring, causing the abutment plate 340 to form an adaptive bending deformation, realizing the fine adjustment of the arc surface; the two are completed sequentially or simultaneously. After the shape is deformed, electromagnetic coil two and electromagnetic coil one are energized and locked respectively. The radial telescopic coarse adjustment and conformal bending fine adjustment are seamlessly linked under the synergy of magnetic instantaneous unlocking, so that the flexible abutment plate 320 can directly transition from a free adjustment state to a rigid support state that is completely matched and locked with the inner wall of the winding drum 400 of different diameters. This not only breaks the limitation of traditional telescopic structures that can only contact with a fixed shape, but also avoids the contradiction that rigid support and flexible adaptation cannot be achieved at the same time. Thus, even when winding at extremely high speed, the maximum contact area and no stress concentration can still be guaranteed, fundamentally preventing the winding drum from deforming and breaking.

[0069] While the flexible abutment plate 320 bends by rotating its own unit abutment plate 341 and uses the inner flexible abutment plate 330 to provide uniform and stable support for the inner wall of the winding drum 400, the exhaust fan is activated to inflate the built-in second airbag pad 352, causing the airbag to expand and compress the already bonded inner flexible abutment plate 330. The secondary expansion of the second airbag pad 352 is not simply to increase the support force, but rather, based on the initial bonding of the inner flexible abutment plate 330, it uses uniform air pressure to solidify the flexible structure into a support shape that is precisely consistent with the inner wall of the winding drum 400, forming an effect similar to liquid filling followed by solidification and locking. This secondary positioning and shaping, which involves bonding first and then expanding, not only eliminates any residual micro-gaps, but also gives the support structure the ability to follow up and resist vibration, effectively suppressing centrifugal deformation and slippage during high-speed winding, ensuring that the winding tension is always uniform and stable, and significantly improving the neatness of the finished roll end face. This is something that cannot be achieved by single mechanical bonding or single air-filled support.

[0070] Multiple support foot assemblies 300 are distributed circumferentially. Each support foot assembly 300 independently controls the radial extension and retraction of the lifting support column 310 to adapt to the diameter of the winding drum 400. The flexible abutment plates 320 driven by each other independently bend to conform to the local inner wall curvature of their respective positions. Finally, they are all inflated by the second airbag cushion 352 to apply uniform air pressure to each of the conforming inner flexible abutment plates 330 from the inside. The adaptation at each point is no longer to the same theoretical arc surface, but to the complex inner surface of the winding drum 400, which actually has roundness errors and local unevenness. The device constructs an automatically pressure-equalizing circumferential support system inside the winding drum 400 through a closed loop of single-point independent conformal and global air pressure uniformity. This ensures that the pressure at all contact points is nearly equal, thereby easily compensating for manufacturing defects in the winding drum 400 itself. It generates a large clamping friction force without damaging the winding drum 400, allowing the use of thin-walled, low-cost winding drums and supporting wider and faster winding speeds. This has a significant simultaneous benefit in reducing nonwoven fabric production costs and improving product quality.

[0071] Another objective of this invention is to provide a processing method for the nonwoven fabric preparation apparatus described above, comprising the following steps:

[0072] Step 1: Initial support and multi-point dispersed abutment

[0073] The take-up drum 400 is fitted onto the outside of the take-up assembly, using the column 200 and its circumferentially distributed support foot assemblies 300 as a frame; the drive motor is started for low-speed pre-rotation or manual adjustment, so that the multiple support foot assemblies 300 are initially extended under the drive of the column 200, and dispersed and abutted against the inner wall of the take-up drum 400 from multiple directions to form multi-point dispersed pre-support.

[0074] Step 2: Radial expansion and contraction coarse adjustment to fit the drum diameter

[0075] Before the support foot assembly 300 contacts the inner wall of the winding drum 400 or when adjustment is needed, the electromagnetic coils 2 inside each lifting support column 310 are de-energized; at this time, the limiting groove 3111 loses its magnetism, releasing the lock between the fixed support column 311 and the moving support column 312; then the electric telescopic rod 3112 is activated, driving the fixed support column 311 and the moving support column 312 to slide linearly out of alignment, thereby driving the flexible abutment plate 320 to move radially, initially adjusting the radial position of the flexible abutment plate 320 inside the winding drum 400 to adapt to different diameters of the winding drum 400; after the position is adjusted to the correct position, the electromagnetic coils 2 are energized again, so that the limiting groove 3111 regains its magnetism, locking the fixed support column 311 and the moving support column 312 at the current telescopic length;

[0076] Step 3: Fine-tune the curvature to achieve a perfect fit between the curved surfaces.

[0077] Before or during the outward expansion of the flexible abutment plate 320 to abut against the inner wall of the winding drum 400, the electromagnetic coil inside the flexible abutment plate 320 is de-energized. At this time, the limiting sidewall 344 loses its magnetism, releasing the lock on the connecting plate 343. As the abutment plate 340 approaches the curved surface of the inner wall of the winding drum 400, the multiple unit abutment plate bodies 341 constituting the abutment plate 340 rotate relatively freely on the plate body 342 through the connecting plate 343. The connecting plate 343 drives the positioning shaft to rotate. At the same time, it drives multiple torsion springs inside to twist, thereby causing the entire abutment plate 340 to undergo adaptive bending deformation; after the bending deformation makes the outer contour of the abutment plate 340 completely conform to the specific curvature of the inner wall of the winding drum 400, the current to the electromagnetic coil one is immediately restored, so that the limiting sidewall regains magnetism, firmly locking the relative angle of the connecting plate 343 and each unit abutment plate 341, so that the flexible abutment plate 320 can fully conform to the inner wall with different diameters and curvatures with the maximum contact surface;

[0078] Step 4: Inflation, Expansion, Secondary Shaping, and Precise Locking

[0079] After completing the aforementioned mechanical expansion, contraction, bonding, and locking, the exhaust fan is activated to inflate the second airbag 352 built into the inner flexible abutment plate 330. During the inflation process, the continuously expanding second airbag 352 applies uniform air pressure from the inside out, squeezing the already bonded inner flexible abutment plate 330 and performing secondary expansion, shaping, and positioning. This air pressure not only fills any possible microscopic gaps but also locks and maintains the supporting shape of the inner flexible abutment plate 330.

[0080] Step 5: High-torque drive and stable winding

[0081] After confirming that all the support foot components 300 have been firmly supported against the inner wall of the winding drum 400 through the dual mechanisms of mechanical bonding and air pressure shaping and locking, the drive motor is started. The drive motor transmits power to the column 220 and all the support foot components 300 on it through the rotating shaft. Utilizing the huge friction force generated by the large-area curved surface bonding and high-pressure extrusion between the flexible abutment plate 320 and the inner wall of the winding drum 400, the winding drum 400 is rotated synchronously, and the high-tension, high-speed nonwoven fabric smooth winding operation begins.

[0082] In the description of this invention, unless otherwise stated, "a plurality of" means two or more. It should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0083] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A nonwoven fabric preparation apparatus, comprising a winding assembly for winding nonwoven fabric during the nonwoven fabric preparation process; the winding assembly includes a rotating shaft (100), a column (200), and a plurality of support leg assemblies (300), the column (200) being rotatably mounted on a drive motor via the rotating shaft (100), the plurality of support leg assemblies (300) being distributed in a ring around the column (200) and directly perpendicularly installed to the side wall of the column (200); the winding assembly is dispersedly supported inside a winding drum (400) by the plurality of support leg assemblies (300), the winding drum (400) being used to wind up the nonwoven fabric; characterized in that, The support foot assembly (300) includes a flexible abutment plate (320) and a plurality of lifting support columns (310). The plurality of lifting support columns (310) are arranged in a straight array along the flexible abutment plate (320). One end of the lifting support column (310) is installed on the flexible abutment plate (320), and the other end is installed on the side wall of the column (200). The lifting support column (310) is used to adjust the position of the flexible abutment plate (320) inside the winding drum (400) by telescopic adjustment. The flexible abutment plate (320) is used to adapt to abut against the inner wall of the winding drum (400) with different curvatures of different diameters.

2. The nonwoven fabric preparation apparatus according to claim 1, characterized in that, The flexible abutment plate (320) is equipped with an inner flexible abutment plate (330), which includes an abutment plate (340) and an airbag cushion (350). The abutment plate (340) is installed inside the airbag cushion (350). One end of the lifting support column (310) is inserted into the airbag cushion (350) and directly installed on the abutment plate (340) to provide stable support for the abutment plate (340) and the airbag cushion (350).

3. The nonwoven fabric preparation apparatus according to claim 2, characterized in that, The airbag cushion (350) includes a first airbag cushion (351), which is used to place the abutment plate (340). The outer wall of the abutment plate (340) is directly and fixedly connected to the inner wall of the first airbag cushion (351). The airbag cushion (350) also includes a second airbag cushion (352), which is installed below the first airbag cushion (351). The first airbag cushion (351) and the second airbag cushion (352) are independent of each other. The second airbag cushion (352) is connected to an external exhaust fan through a connecting pipe. The exhaust fan is used to inflate the second airbag cushion (352). A solenoid valve is provided on the connecting pipe. The solenoid valve is used to deflate the second airbag cushion (352).

4. The nonwoven fabric preparation apparatus according to claim 3, characterized in that, The abutment plate (340) includes multiple unit abutment plate bodies (341), which are elastically rotatably connected to each other; The unit abutting plate (341) includes a plate (342) and a connecting plate (343). The plate (342) is strip-shaped. There are two connecting plates (343), which are distributed at both ends of the plate (342). The connecting plates (343) are elastically rotatably connected to the plate (342).

5. The nonwoven fabric preparation apparatus according to claim 4, characterized in that, Two rotating slots (345) are respectively opened at both ends of the plate (342). Each rotating slot (345) has an insertion hole (346) inside. The connecting plate (343) is inserted into the insertion hole (346) by rotating through the positioning shaft. Multiple torsion springs are assembled inside the insertion hole (346) in conjunction with the positioning shaft. The multiple torsion springs are distributed at equal intervals along the positioning shaft.

6. The nonwoven fabric preparation apparatus according to claim 5, characterized in that, The connecting plate (343) is made of magnetic metal material. The outer wall of the connecting plate (343) is attached to the limiting side wall (344) of the rotating groove (345). Multiple sets of electromagnetic coils are laid on the limiting side wall (344). The electromagnetic coils are switched on and off to determine whether the limiting side wall (344) is magnetic.

7. The nonwoven fabric preparation apparatus according to claim 1, characterized in that, The lifting support column (310) includes a fixed support column (311) and a movable support column (312). One end of the movable support column (312) is slidably mounted on the fixed support column (311), and the other end is mounted on the flexible abutment plate (320). The end of the fixed support column (311) away from the movable support column (312) is mounted on the side wall of the column (200).

8. The nonwoven fabric preparation apparatus according to claim 7, characterized in that, The fixed support column (311) includes a U-shaped support plate (3113), which is installed on the side wall of the column (200). An electric telescopic rod (3112) is fixed inside the U-shaped support plate (3113), and a limit groove (3111) is opened on one side of the U-shaped support plate (3113).

9. The nonwoven fabric preparation apparatus according to claim 8, characterized in that, The movable support column (312) includes an L-shaped support plate (3123) and a support cross plate (3121). One end of the L-shaped support plate (3123) is fixed on the electric telescopic rod (3112). A limit strip (3122) is fixed on the side of the L-shaped support plate (3123). The limit strip (3122) is slidably assembled in the limit groove (3111). The limit strip (3122) is made of magnetic metal material. Multiple sets of electromagnetic coils are laid inside the limit groove (3111). The electromagnetic coils are switched on and off to determine whether the limit groove (3111) is magnetized.

10. A processing method for a nonwoven fabric preparation apparatus according to any one of claims 1-9, characterized in that, Includes the following steps: Step 1: Initial support and multi-point dispersed abutment The take-up drum (400) is fitted onto the outside of the take-up assembly, and the column (200) and its circumferentially distributed support foot assemblies (300) serve as the frame; the drive motor is started for low-speed pre-rotation or manual adjustment, so that the multiple support foot assemblies (300) are initially extended under the drive of the column (200) and dispersed from multiple directions to abut against the inner wall of the take-up drum (400), forming multi-point dispersed pre-support; Step 2: Radial expansion and contraction coarse adjustment to fit the drum diameter Before the support foot assembly (300) contacts the inner wall of the winding drum (400) or when adjustment is needed, the second electromagnetic coil inside each lifting support column (310) is de-energized; at this time, the limiting groove (3111) loses its magnetism, releasing the lock between the fixed support column (311) and the moving support column (312); then the electric telescopic rod (3112) is activated, driving the fixed support column (311) and the moving support column (312) to slide linearly out of alignment, thereby driving the flexible abutment plate (320) to move radially, initially adjusting the radial position of the flexible abutment plate (320) inside the winding drum (400) to adapt to different diameters of the winding drum (400); after the position is adjusted to the correct position, the second electromagnetic coil is energized again, so that the limiting groove (3111) regains its magnetism, locking the fixed support column (311) and the moving support column (312) at the current telescopic length; Step 3: Fine-tune the curvature to achieve a perfect fit between the curved surfaces. Before or during the outward expansion of the flexible abutment plate (320) to abut against the inner wall of the winding drum (400), the electromagnetic coil inside the flexible abutment plate (320) is de-energized; at this time, the limiting sidewall (344) loses its magnetism and releases the lock on the connecting plate (343); as the abutment plate (340) approaches the curved surface of the inner wall of the winding drum (400), the multiple unit abutment plate bodies (341) constituting the abutment plate (340) rotate relatively freely on the plate body (342) through the connecting plate (343), and the connecting plate (343) drives The positioning shaft rotates, which in turn drives multiple torsion springs inside it to twist, thereby causing the entire abutment plate (340) to undergo adaptive bending deformation. After the bending deformation causes the outer contour of the abutment plate (340) to completely conform to the specific curvature of the inner wall of the winding drum (400), the current to the electromagnetic coil is immediately restored, so that the limiting sidewall regains its magnetism and firmly locks the relative angle of the connecting plate (343) and each unit abutment plate (341), so that the flexible abutment plate (320) can fully conform to the inner wall with different diameters and curvatures with the maximum contact surface. Step 4: Inflation, Expansion, Secondary Shaping, and Precise Locking After completing the above-mentioned mechanical expansion, bending, bonding and locking, the exhaust fan is started to inflate the second airbag (352) built into the inner flexible abutment plate (330); during the inflation process, the continuously expanding second airbag (352) applies uniform air pressure from the inside to the outside, squeezing the inner flexible abutment plate (330) that has been bonded, and performing secondary expansion, shaping and positioning on it; this air pressure not only fills any possible micro gaps, but also locks and maintains the supporting shape of the inner flexible abutment plate (330); Step 5: High-torque drive and stable winding After confirming that all the support foot components (300) have been firmly secured to the inner wall of the winding drum (400) through a dual mechanism of mechanical bonding and air pressure shaping, the drive motor is started. The drive motor transmits power to the column (220) and all the support foot components (300) on it through the rotating shaft. Utilizing the huge friction force generated by the large-area curved surface bonding and high-pressure extrusion between the flexible abutment plate (320) and the inner wall of the winding drum (400), the winding drum (400) is driven to rotate synchronously, and the high-tension, high-speed nonwoven fabric smooth winding operation begins.

Images