Boot forming device for papermaking and forming method

Abstract

The present application belongs to the technical field of production of papermaking boot cover, and specifically provides a papermaking boot cover forming device and a forming method. The papermaking boot cover forming device comprises a supporting assembly, a glue coating head and two cloth stretching clamp assemblies. The supporting assembly comprises two supporting rollers. When the boot cover is produced, the base cloth is sleeved outside the two supporting rollers. The two supporting rollers are adjusted to maintain a certain tension of the base cloth. The supporting rollers rotate to drive the base cloth to rotate. The glue coating head uniformly coats glue on the glue coating area of the base cloth surface. After the glue solidifies, the boot cover blank is obtained. In order to prevent the grid-shaped base cloth from shrinking under the action of the tension, one cloth stretching clamp assembly is arranged on each side of the base cloth. The two side edge areas of the base cloth are intermittently clamped by the cloth stretching clamp assemblies, and an outward tension is applied to the base cloth. Therefore, the width of the base cloth is kept stable within the acceptable range of the process. By arranging the cloth stretching clamp assemblies, the width deviation caused by the edge shrinkage of the base cloth can be reduced, and the uniformity of the polyurethane coating distribution in the edge area is improved.

Description

Technical Field

[0001] This application belongs to the field of papermaking boot cover production technology, specifically a papermaking boot cover forming device and forming method. Background Technology

[0002] The shoe cover is a core component in the press section of a paper machine. It is usually made of high-strength base fabric and polyurethane elastomer. Its dimensional accuracy, wall thickness uniformity and inner surface quality directly affect the pressing effect and service life.

[0003] In existing technology, rotary casting is a process for producing boot covers. This process first involves creating a closed tubular base fabric using knitting or weaving. This base fabric is then fitted and tensioned between two parallel support rollers. The support rollers rotate under power, causing the entire endless tubular base fabric to rotate circumferentially. Simultaneously, a coating head, movable along the axial direction of the support rollers, coats the outer surface of the rotating base fabric with liquid polyurethane adhesive. The polyurethane adhesive impregnates and cures the base fabric, forming a boot cover blank. After the polyurethane has fully cured, the outer surface of the boot cover blank is machined, ground, and cut to precisely control wall thickness, roundness, and dimensional accuracy, ultimately obtaining a finished boot cover that meets usage requirements.

[0004] However, the aforementioned manufacturing process for boot covers still has some technical shortcomings in practical applications. The base fabric is a flexible component, requiring two support rollers to maintain a certain circumferential tension to ensure uniform polyurethane impregnation and consistent coating thickness. Because the base fabric itself has a mesh-like flexible fabric structure, under tension, its edges tend to shrink inwards along the axial direction of the support rollers, causing the overall width of the base fabric to gradually narrow. This edge shrinkage not only causes the final boot cover product's width to deviate from design requirements but also results in uneven distribution of the polyurethane coating at the edges, even creating weak areas, affecting the sealing performance and service life of the boot cover. Summary of the Invention

[0005] Based on the above-mentioned technical problems, this application provides a papermaking boot cover forming device to solve the technical problem in the prior art that the base fabric shrinks inward under the tension of the support roller, resulting in a narrowing of its width.

[0006] To achieve the above objectives, the technical solution adopted in this application is as follows: In a first aspect, a papermaking boot cover forming apparatus is provided, comprising: The support assembly includes two support rollers that are parallel to each other and spaced apart. The outer side of the support rollers is used to cover an annular base fabric. The base fabric has a central adhesive coating area and edge areas located on both sides of the adhesive coating area. The glue applicator head is movably arranged along the axial direction of the support roller and is used to apply glue to the glue application area of ​​the base fabric. Two fabric clamping assemblies are respectively located between the two edge areas of the base fabric along the axial direction of the support rollers. Each fabric clamping assembly includes a clamp, a first adjusting mechanism, and a second adjusting mechanism. The clamp is used to clamp the edge area of ​​the base fabric. The first adjusting mechanism is connected to the clamp and drives the clamp to reciprocate along the axial direction of the support rollers. The second adjusting mechanism is connected to the first adjusting mechanism or the clamp and drives the clamp to move along the line connecting the two support rollers, so that the clamp can move in the same direction and at the same speed as the base fabric when clamping the edge area.

[0007] In one possible implementation, the end of the support roller is rotatably fitted with a bearing seat, and the support assembly further includes two first tracks. The first tracks are arranged along the connecting direction of the support rollers, and the two first tracks are spaced apart along the axial direction of the support rollers. Each bearing seat is provided with a first traveling mechanism, and the bearing seat is movably mounted on the first track through the corresponding first traveling mechanism.

[0008] In one possible implementation, the bearing seat is detachably connected to the support roller; the support assembly further includes: The second track is arranged horizontally perpendicular to the first track. Of the two first tracks, one is fixed, and the other slides with the second track. The first driving member is used to drive the corresponding first track to reciprocate along the second track. When the first track moves, the bearing seat located on the first track disengages from the end of the corresponding support roller, so that the end is suspended.

[0009] In one possible implementation, the bearing includes: The base has a first groove for accommodating the lower part of the support roller shaft end, the first groove being an arc-shaped groove with the opening facing upwards, and the first traveling mechanism is disposed on the base; The pressure cap has a second groove for accommodating the upper part of the support roller shaft end, the second groove being an arc-shaped groove with the opening facing downwards; A lifting mechanism is located on the base and connected to the pressure cover, used to drive the pressure cover to move up and down.

[0010] In one possible implementation, the second regulating mechanism includes: The third track is parallel to the first track and slides with the second track. The third track is fixedly connected to the movable first track of the two first tracks. A slide table is slidably fitted onto the third track, and the first adjustment mechanism is disposed on the slide table; A second traveling mechanism is provided on the slide, and the slide is movably provided on the third track via the second traveling mechanism.

[0011] In one possible implementation, the support roller is a hollow tubular structure, and the inner hole of the support roller extends through at least one of its non-suspended ends to form an inlet and outlet.

[0012] In one possible implementation, the papermaking boot forming device further includes an auxiliary support mechanism, the auxiliary support mechanism comprising: Two beams are provided at one end of the support roller that forms the inlet and outlet. The two beams are spaced apart along the arrangement direction of the support roller. A fourth track is provided at the bottom of the beam along the axial direction of the support roller. Two support arms are slidably disposed on the fourth track, corresponding to each other. The support arms extend axially along the support roller. When the support roller is suspended, the support arms extend from the inlet / outlet into the inner hole of the support roller, providing support to the suspended end of the support roller; and The third traveling mechanism is used to drive the support arm to reciprocate along the fourth track.

[0013] In one possible implementation, a lifting column is connected to the lower part of the beam.

[0014] Compared with the prior art, the beneficial effects of the papermaking boot cover forming device and forming method provided in this application are: The papermaking boot cover forming apparatus provided in this application includes a support assembly, a glue applicator head, and two fabric clamping assemblies. The support assembly includes two support rollers. During boot cover production, the base fabric is placed on the outside of the two support rollers. The two support rollers are adjusted to maintain a certain tension on the base fabric. The rotation of the support rollers drives the base fabric to rotate. The glue applicator head applies glue to the glue application area on the surface of the base fabric at a uniform speed. After the glue cures, a boot cover blank is obtained. To prevent the mesh-like base fabric from shrinking under tension, a fabric clamping assembly is set on each side of the base fabric. The fabric clamping assemblies intermittently clamp the edge areas on both sides of the base fabric, applying an outward tension force to the base fabric.

[0015] The fabric clamping assembly includes a clamp, a first adjustment mechanism, and a second adjustment mechanism. The clamp is used to hold the edge area of ​​the base fabric located between two support rollers. After the clamp holds the edge area, the first adjustment mechanism applies an outward tension force along the axial direction of the support rollers to the edge area through the clamp, which can suppress the tendency of the base fabric to shrink inward under the tension force, thereby keeping the width of the base fabric stable within the acceptable range of the process. During the clamping period, the second adjustment mechanism drives the clamp to move in the same direction and at the same speed as the base fabric along the direction of base fabric movement, avoiding relative friction, tearing, or accumulation between the clamp and the base fabric. By setting up the fabric clamping assembly, the width deviation caused by the shrinkage of the base fabric edge can be reduced, and the uniformity of the polyurethane coating distribution in the edge area can be improved.

[0016] Secondly, this application provides a method for forming papermaking boot covers, using the papermaking boot cover forming apparatus described in any of the above implementations, comprising the following steps: The annular base fabric is placed on two support rollers, and the distance between the two support rollers is adjusted to keep the base fabric taut. Control the support roller to operate at a constant speed, manipulate the glue applicator head to move along the axial direction of the support roller, and apply glue to the glue application area of ​​the base fabric during the movement until the glue completely covers the glue application area. During the application and curing of the adhesive, the edge area of ​​the base fabric is intermittently clamped by the fabric clamping assembly, and an outward tension is applied to the edge area to keep the width of the base fabric within a preset range. After the adhesive has cured, a boot cover blank is obtained. The outer surface of the boot cover blank is turned and ground, and the edge area is cut to obtain the finished boot cover.

[0017] During the application and curing of the adhesive, an infrared heating device is used to heat the base fabric and the surface of the adhesive.

[0018] The papermaking boot cover forming method provided in this application, which adopts any of the above-described implementation methods of the papermaking boot cover forming device, has the same technical effect, and will not be described in detail here. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 The three-dimensional representation of the papermaking boot cover forming apparatus provided in the embodiments of this application Figure 1 ; Figure 2 for Figure 1 Enlarged view of part A in the middle; Figure 3 This is a partial enlarged view of the papermaking boot cover forming apparatus provided in the embodiments of this application; Figure 4 A top view of a papermaking boot cover forming apparatus provided in an embodiment of this application; Figure 5 The three-dimensional representation of the papermaking boot cover forming apparatus provided in the embodiments of this application Figure 2 ; Figure 6 for Figure 5 Enlarged view of part B in the middle; Figure 7 This is a structural diagram of the auxiliary support mechanism; Explanation of reference numerals in the attached figures: 10. Support assembly; 11. Support roller; 12. Shaft seat; 121. Base; 122. Pressure cap; 123. Lifting mechanism; 124. First traveling mechanism; 13. First track; 14. Second track; 15. First drive component; 20. Fabric clamp assembly; 21. Clamp; 22. First adjustment mechanism; 23. Second adjustment mechanism; 231. Third track; 232. Slide table; 233. Second traveling mechanism; 30. Auxiliary support mechanism; 31. Beam; 32. Support arm; 33. Third traveling mechanism; 34. Lifting column. Detailed Implementation

[0021] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0022] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0023] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not 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 application.

[0024] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" or "several" means two or more, unless otherwise explicitly specified.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0026] Please refer to the following: Figures 1 to 7 The following describes the papermaking boot cover forming apparatus and forming method provided in the embodiments of this application.

[0027] In a first aspect, embodiments of this application provide a papermaking boot cover forming apparatus, including a support assembly 10, an adhesive applicator head, and a fabric clamping assembly 20.

[0028] The support assembly 10 includes two support rollers 11 arranged parallel to each other and spaced apart. The support rollers 11 can be solid circular rollers or hollow tubular rollers. Considering the large volume of the support rollers 11, a hollow structure is preferred to reduce their weight and alleviate the stress on related components. The support rollers 11 are driven by an electric motor or hydraulic motor, using common transmission methods such as gear drive, synchronous belt drive, or chain drive to achieve power transmission. The two support rollers 11 can be driven by the same drive device or by separate drive devices.

[0029] The outer surface of the support roller 11 can be plated with hard chrome, coated with an anti-slip polyurethane layer, or have anti-slip textures as needed to increase the friction between the base fabric and the roller surface and prevent the base fabric from slipping during rotation. The diameter of the support roller 11 is, for example, 100 to 600 mm, and the axial length is selected according to the required shoe width, for example, 1000 to 8000 mm.

[0030] The outer side of the support roller 11 is fitted with an annular base fabric, which is a polyester web used in papermaking equipment in the prior art. The base fabric has a central gluten coating area and edge areas located on both sides of the gluten coating area. The width of the polyester web is slightly larger than the width of the boot sleeve to form edge areas on both sides that are expected to be cut later.

[0031] The glue applicator head is movably positioned along the axial direction of the support roller 11, and is used to apply glue to the glue application area of ​​the base fabric while moving. After the glue cures, it forms a boot cover blank together with the base fabric. The glue applicator head can be mounted on a linear guide rail and driven by a motor screw mechanism or a hydraulic rod. The glue applicator head is connected to a glue storage and conveying device, including a glue storage tank, a conveying pump, and other components. The material of the glue, the structure of the glue applicator head, and the glue storage and conveying device, as well as their operating methods, are all existing technologies and will not be described in detail here.

[0032] The two fabric clamping assemblies 20 correspond to the two edge areas of the base fabric along the axial direction of the support rollers 11, and are located between the two support rollers 11. Under the control of the PLC control program, the two fabric clamping assemblies 20 can achieve near-synchronous operation, applying approximately tensile force to both sides of the base fabric, which is horizontal between the two support rollers 11, to suppress the tendency of the base fabric to shrink inward under the action of tension force, and keep the width of the base fabric stable within the acceptable range of the process.

[0033] The fabric clamping assembly includes a clamp 21, a first adjusting mechanism 22, and a second adjusting mechanism 23. The clamp 21 is used to clamp the edge area of ​​the base fabric and can be a commercially available mechanical gripper. Specifically, the clamp 21 includes an upper clamping plate, a lower clamping plate, and a drive structure for driving the upper and lower clamping plates to close or open. The upper and lower clamping plates are symmetrical and are both elongated strips extending along the line connecting the two support rollers, with a length of 20-50 cm. Silicone, polyurethane, or rubber pads can be provided on the clamping surfaces of the upper and lower clamping plates to increase friction and prevent damage to the base fabric. The drive structure is used to realize the clamping action of the clamp 21 and can be implemented by a cylinder, hydraulic cylinder, etc.

[0034] Force sensors can be installed at the mounting positions of clamp 21 and the first adjustment mechanism 22 to monitor the tension applied to the base fabric by clamp 21 in real time, so that the tension is maintained within a suitable range. This avoids the situation where excessive tension will tear the base fabric, or insufficient tension will fail to suppress shrinkage.

[0035] The first adjustment mechanism 22 is connected to the clamp 21 and drives the clamp 21 to reciprocate along the axial direction of the support roller 11. The second adjustment mechanism 23 is connected to the first adjustment mechanism 22 or the clamp 21 and drives the clamp 21 to move along the line connecting the two support rollers 11, so that the clamp 21 can move in the same direction and at the same speed as the base fabric when clamping the edge area.

[0036] Both the first adjusting mechanism 22 and the second adjusting mechanism 23 are mechanical devices capable of outputting linear reciprocating movement. Their structures can be the same or different. Specifically, the first adjusting mechanism 22 and the second adjusting mechanism 23 can be common motion structures such as ball screw linear modules, electric cylinders, pneumatic cylinders, or gear and rack mechanisms. To achieve the same direction and speed of movement between the clamp 21 and the base fabric, a speed sensor can be set to collect the rotational speed of the support roller 11. The base fabric speed is calculated based on the rotational speed of the support roller 11, and the drive speed of the second adjusting mechanism 23 is controlled based on this signal.

[0037] To achieve precise clamping of the base fabric edge area by the clamp 21, a base fabric edge position detection device can be provided. The first adjustment mechanism 22 adaptively adjusts its own stroke position according to the edge position of the base fabric, ensuring that the clamp 21 clamps the edge area without interfering with the adhesive application area. The base fabric edge position detection device can be a non-contact or contact edge position sensor commonly used in the art, used to acquire the position information of the base fabric edge in the axial direction of the support roller 11 in real time. Specifically, the base fabric edge position detection device can be any one or a combination of the following: Form 1: Employing a through-beam photoelectric sensor. The transmitter and receiver of the through-beam photoelectric sensor can be respectively positioned on the upper and lower sides of the edge area of ​​the base fabric. When the edge of the base fabric shifts, the position of the base fabric blocking the light path changes, thereby detecting the edge position. Considering that the base fabric is a mesh-like flexible fabric, the through-beam photoelectric sensor can identify the edge boundary through the difference in light transmission between the mesh gaps.

[0038] Option 2: A laser displacement sensor is used. This sensor can be installed above or to the side of the base fabric edge area, emitting a laser beam towards the base fabric edge. The laser measurement principle is used to detect changes in the distance between the base fabric edge and the sensor, thereby determining the actual position of the base fabric edge along the axial direction of the support roller 11. Multiple laser displacement sensors can be spaced apart along the axial direction of the support roller 11.

[0039] Method 3: Employing industrial cameras or vision inspection devices. Industrial cameras capture images of the fabric edge area, and edge recognition algorithms extract the coordinates of the fabric edge. Vision inspection devices are well-suited for mesh-like fabrics, capable of recognizing complex edge shapes, and can simultaneously monitor changes in edge width.

[0040] In practical applications, the base fabric edge position detection device is installed on a fixed frame and close to the edge area of ​​the base fabric. The detection device transmits the base fabric edge position signal to the controller. Based on the deviation between the detection signal and the set position, the controller controls the first adjustment mechanism 22 to drive the clamp 21 to move axially along the support roller 11, so that the clamp 21 is always aligned with and reliably clamps the edge area of ​​the base fabric, thereby achieving adaptive and precise clamping.

[0041] It should be noted that the aforementioned fabric edge position detection devices, such as laser displacement sensors, industrial camera vision inspection devices, photoelectric sensors, and ultrasonic sensors, are all well-known and mature detection components in the field. Their working principles, signal output methods, and interface methods with the controller are all direct applications of existing technologies. The core improvement of this application lies in using the fabric edge position signals output by these detection devices to control the first adjustment mechanism 22 to adjust the position of the clamp 21 along the axial direction of the support roller 11, thereby achieving adaptive and precise clamping of the fabric edge area by the clamp 21, rather than improving the structure or detection principle of the detection device itself. Therefore, even if this application does not describe in detail the internal circuitry, image processing algorithms, specific models, or installation and debugging details of the aforementioned detection devices, those skilled in the art can conventionally select and configure suitable detection devices from the existing technology according to actual working conditions and accuracy requirements, without affecting the complete understanding and implementation of the technical solution described in this application.

[0042] like Figures 1 to 5 As shown, both fabric clamping assemblies 20 are positioned between the two support rollers 11, corresponding to the two edge areas of the base fabric along the axial direction of the support rollers 11. When the support rollers 11 drive the base fabric to rotate circumferentially, the portion of the base fabric located between the two support rollers 11 is horizontal or nearly horizontal. The clamps 21 only clamp the edge areas of the base fabric within this nearly horizontal region. The reason for limiting the clamping area to between the two support rollers 11 is that the curvature of the base fabric changes continuously as it passes over the arc-shaped surface of the support rollers 11. On the one hand, the clamps 21 have difficulty forming a stable clamp in the arc-shaped region, and on the other hand, they may collide and interfere with the support rollers 11. Therefore, the clamp 21 adopts an intermittent clamping method: when the edge area of ​​the base fabric rotates with the base fabric to an approximately horizontal area between the two support rollers 11, the first adjusting mechanism 22 drives the clamp 21 to move along the axial direction of the support rollers 11 to the position corresponding to the edge area. The clamp 21 performs a clamping action and applies tension outward along the axial direction of the support rollers 11. Subsequently, the second adjusting mechanism 23 drives the clamp 21 to move along the line connecting the two support rollers 11, so that the clamp 21 moves synchronously with the base fabric. When the edge area of ​​the base fabric is about to leave the area between the two support rollers 11, the clamp 21 releases the edge area, and the first adjusting mechanism 22 and the second adjusting mechanism 23 drive the clamp 21 to reset to the initial clamping position, waiting for the next clamping cycle. Through the above-mentioned intermittent clamping method, the edge shrinkage of the base fabric can be continuously suppressed during gluing and curing, maintaining a stable width, and the motion interference between the clamp 21 and the support rollers 11 can be effectively avoided, ensuring the safe operation of the equipment.

[0043] In each clamping cycle, the clamp 21 performs a brief clamping and tensioning operation on the base fabric in the horizontal area between the two support rollers 11, which can compensate for the previously slowly accumulated edge shrinkage and restore the width of the base fabric to the preset range.

[0044] Compared with the prior art, the beneficial effects of the papermaking boot cover forming apparatus and forming method provided in this application are: The papermaking boot cover forming apparatus provided in this application includes a support assembly 10, a glue applicator head, and two fabric clamping assemblies 20. The support assembly 10 includes two support rollers 11. During boot cover production, the base fabric is fitted onto the outside of the two support rollers 11. The two support rollers 11 are adjusted to maintain a certain tension on the base fabric. The rotation of the support rollers 11 drives the base fabric to rotate. The glue applicator head applies glue to the glue application area on the surface of the base fabric at a uniform speed. After the glue cures, a boot cover blank is obtained. To prevent the mesh-like base fabric from shrinking under tension, a fabric clamping assembly 20 is provided on each side of the base fabric. The fabric clamping assembly 20 intermittently clamps the edge areas on both sides of the base fabric, applying an outward tension force to the base fabric.

[0045] The fabric clamping assembly 20 includes a clamp 21, a first adjusting mechanism 22, and a second adjusting mechanism 23. The clamp 21 is used to clamp the edge area of ​​the base fabric located between two support rollers 11. After the clamp 21 clamps the edge area, the first adjusting mechanism 22 applies a tension force outward along the axial direction of the support rollers 11 to the edge area through the clamp 21, which can suppress the tendency of the base fabric to shrink inward under the tension force, thereby keeping the width of the base fabric stable within the acceptable range of the process. During the clamping period of the clamp 21, the second adjusting mechanism 23 drives the clamp 21 to move in the same direction and at the same speed as the base fabric along the direction of base fabric movement, avoiding relative friction, tearing, or accumulation between the clamp 21 and the base fabric. By setting the fabric clamping assembly 20, the width deviation caused by the shrinkage of the base fabric edge can be reduced, and the uniformity of the polyurethane coating distribution in the edge area can be improved.

[0046] Please see Figure 2 In some possible embodiments, the end of the support roller 11 is rotatably fitted with a bearing seat 12. The bearing seat 12 can be an integral or split bearing seat, and a rolling bearing or a sliding bearing is installed inside it. The rolling bearing can be, for example, a ball bearing, a cylindrical roller bearing, or a tapered roller bearing, to reduce the rotational resistance of the support roller 11. The bearing seat 12 can be made of cast steel, ductile iron, or thick steel plate welded and then machined. The shaft end of the support roller 11 is inserted into the bearing inner hole. When the bearing seat 12 adopts a split structure, the end of the support roller 11 is fixedly connected to the bearing inner hole, and the bearing and the bearing seat 12 are detachably connected. The bearing seat 12 has a bushing that mates with the outer ring of the bearing.

[0047] To achieve translation of the support rollers 11 and adjust the distance between the two support rollers 11, the support assembly 10 also includes two first tracks 13. The first tracks 13 are arranged along the line connecting the support rollers 11, and the two first tracks 13 are spaced apart along the axial direction of the support rollers 11. The first tracks 13 can be heavy-duty linear guides, V-shaped guides, rectangular guides, or guide grooves opened on the frame. Each bearing 12 is provided with a first traveling mechanism 124, and the bearing 12 is movably mounted on the first track 13 through the corresponding first traveling mechanism 124.

[0048] The first traveling mechanism 124 may include a slider, a gear, and a motor for transmission with the gear. The slider is fixedly connected to the bearing seat 12 of the support roller 11, and the movement of the slider causes the bearing seat 12 to move synchronously. A rack may be provided on the first track 13, and a gear meshing with the rack is installed on the output shaft of the motor. The motor drives the gear to rotate, thereby causing the slider to move along the length of the rack.

[0049] Since the base fabric is a closed cylindrical shape, when installing or removing the base fabric, the bearing seat 12 at one end of the support roller 11 needs to be removed so that the end is suspended. Then the base fabric is fitted onto the support roller 11 from the suspended end. Therefore, the bearing seat 12 needs to be designed as a split type.

[0050] Please see Figure 1 , Figure 4 and Figure 5 To achieve a separable design between the bearing seat 12 and the support roller 11, the bearing seat 12 and the support roller 11 are detachably connected. The bearing seat 12 includes a base 121, a pressure cover 122, and a lifting mechanism 123.

[0051] The base 121 can be made of cast steel, ductile iron, or thick steel plate welded and then machined. The base 121 has a first groove for accommodating the lower part of the support roller 11 shaft end. The first groove is an upward-opening arc-shaped groove, the radius of which matches the lower part of the support roller 11 shaft end. Wear-resistant bearing bushes, copper sleeves, or semi-circular rolling bearing bushes can be installed within the groove. The cover 122 corresponds in shape to the base 121, having a second groove for accommodating the upper part of the support roller 11 shaft end. The second groove is a downward-opening arc-shaped groove. After the cover 122 and the base 121 are engaged, a complete bearing seat hole is formed. The cover 122 and the base 121 can be fastened together by bolts, a hydraulic locking mechanism, or a quick-clamping mechanism.

[0052] A lifting mechanism 123 is located on the base 121 and connected to the pressure cap 122, used to drive the pressure cap 122 to move up and down. The lifting mechanism 123 can be located on both sides or at the four corners of the base 121 to drive the pressure cap 122 to rise and fall. The lifting mechanism 123 can be a hydraulic cylinder, electric cylinder, or other lifting mechanism. To ensure that the pressure cap 122 does not tilt during the rising and falling process, a vertical guide column can be provided on the base 121, and a guide hole can be provided at the corresponding position on the pressure cap 122.

[0053] Because the bearing seat 12 is relatively large, after the bearing seat 12 separates from the support roller 11, a drive device is needed to move the bearing seat 12 axially to allow space for the installation or removal of the base fabric. To achieve the axial movement of the bearing seat 12, the support assembly 10 also includes a second track 14 and a first drive member 15. The second track 14 is arranged horizontally perpendicular to the first track 13 and can be installed on the foundation, frame beam, or base 121. Of the two first tracks 13, one is fixed, and the other slides with the second track 14. The first drive member 15 drives the corresponding first track 13 to reciprocate along the second track 14. The first drive member 15 can be a hydraulic cylinder, pneumatic cylinder, electric push rod, or other drive mechanism, and its stroke should be sufficient to completely disengage the bearing seat 12 from the end of the support roller 11, for example, a stroke of 500–2000 mm. When the first track 13 moves, the bearing seat 12 located on the first track 13 disengages from the end of the corresponding support roller 11, leaving that end suspended.

[0054] When the base fabric needs to be replaced, the bearing seat 12 at the suspended end separates from the support roller 11. The first drive member 15 pushes the movable first track 13 to move laterally along the second track 14, causing the bearing seat 12 on the first track 13 to move synchronously, thus separating the bearing seat 12 from the end of the support roller 11. At this time, one end of the support roller 11 loses radial support and becomes suspended, allowing the operator to axially insert or remove the annular base fabric from this suspended end. When inserting or removing the base fabric, the distance between the two support rollers 11 is small, and there is no tension.

[0055] Please see Figure 2 and Figure 3 In some possible embodiments, the second adjustment mechanism 23 includes a third track 231, a slide 232, and a second walking mechanism 233.

[0056] The third track 231 is parallel to the first track 13 and slides with the second track 14. The third track 231 is fixedly connected to the movable first track 13 of the two first tracks 13, thereby enabling the fabric clamp assembly 20 located at the suspended end to make way when changing the fabric.

[0057] The slide table 232 can be a welded steel plate box structure or an aluminum alloy plate structure, with its bottom surface slidingly engaged with the third track 231 via a slider, roller, or slide block. A first adjustment mechanism 22 is mounted on the slide table 232. The first adjustment mechanism 22 can be a ball screw linear module, an electric cylinder, a pneumatic cylinder, or a motor-driven rack and pinion mechanism, used to drive the clamp 21 to move axially along the support roller 11. A second traveling mechanism 233 is located on the slide table 232, and the slide table 232 is movably mounted on the third track 231 via the second traveling mechanism 233. The second traveling mechanism 233 can be a motor-driven rack and pinion structure, an electric telescopic rod, or other structures as used in the prior art.

[0058] Please see Figure 1 and Figure 2 In one possible implementation, the support roller 11 is a hollow tubular structure, which can reduce its own weight while meeting the requirements of bending stiffness and load-bearing capacity. The inner hole of the support roller 11 extends through at least one of its non-suspended ends to form an inlet and outlet for the insertion of auxiliary support components. Before the bearing seat 12 separates from the support roller 11, the support roller 11 moves to a position corresponding to the auxiliary support component (i.e., the support arm 32 hereinafter). The auxiliary support component extends into the inlet and outlet to provide support force to the suspended end, preventing the support roller 11 from undergoing excessive bending deformation due to its own weight and the tension of the base fabric, thus ensuring the safety of fabric replacement and the service life of the support roller 11.

[0059] Please see Figure 1 , Figure 4 , Figure 5 , Figure 6 and Figure 7 In some possible embodiments, the papermaking boot cover forming device further includes an auxiliary support mechanism 30, which includes a beam 31, a support arm 32, and a third traveling mechanism 33.

[0060] Two beams 31 are located at one end of the support roller 11 that forms the inlet and outlet. The two beams 31 are spaced apart along the arrangement direction of the support roller 11. The beams 31 adopt box beams or welded truss structures. A fourth track is provided at the bottom of the beams 31 along the axial direction of the support roller 11. The fourth track extends along the axial direction of the support roller 11 and can adopt structures such as linear guides or guide grooves.

[0061] The support arm 32 is a slender cantilever component, which can be made of steel pipe, round steel, H-beam, etc. Two support arms 32 are slidably mounted on the fourth track, corresponding to each other. The support arms 32 extend axially along the support roller 11. The end of the support arm 32 that extends into the inlet / outlet has a support head for contacting the inner wall of the support roller 11. When the support roller 11 is suspended, the support arm 32 extends into the inner hole of the support roller 11 from the inlet / outlet, providing auxiliary support force to the suspended end of the support roller 11 through the support head. The third traveling mechanism 33 drives the two support arms 32 to reciprocate synchronously along the fourth track. The third traveling mechanism 33 can be a hydraulic cylinder, an electric push rod, or other driving methods.

[0062] When one end of the support roller 11 is suspended, the support arm 32 can extend into the inner hole of the support roller 11 from the inlet / outlet of the non-suspended end, providing internal support near the suspended end. This effectively counteracts the bending deformation caused by the weight of the support roller 11 and the tension of the base fabric, keeping the axis of the support roller 11 horizontal, ensuring smooth insertion of the base fabric, and preventing excessive deflection or instability of the support roller 11 due to suspension. After the fabric is changed, the support arm 32 withdraws from the inner hole of the support roller 11 without interfering with the normal rotation and gluing operation of the support roller 11.

[0063] Please see Figure 6 and Figure 7 In some possible embodiments, a lifting column 34 is connected to the lower part of the beam 31 for adjusting the height of the beam 31 and the support arm 32. The lifting column 34 may be a hydraulic telescopic cylinder.

[0064] The lifting column 34 can adjust the installation height of the beam 31 and the support arm 32, aligning the axis of the support arm 32 with the axis of the inner hole of the support roller 11. This ensures that the support arm 32 can be smoothly and stably inserted into the inner hole of the support roller 11, avoiding jamming, scratching of the inner hole, or unstable support due to height deviation. Simultaneously, this structure can adapt to working conditions with support rollers 11 of different diameters and different installation heights, improving the versatility and ease of operation of the device.

[0065] Secondly, embodiments of this application provide a method for forming papermaking boot covers, employing the papermaking boot cover forming apparatus provided in any of the above embodiments, including the following steps: The annular base fabric is fitted onto two support rollers 11. The base fabric has a mesh-like flexible cylindrical structure, and its axial width is greater than the width of the finished shoe cover to allow for edge clamping area and subsequent cutting allowance. The distance between the two support rollers 11 is adjusted to keep the base fabric taut.

[0066] During installation, the auxiliary support mechanism 30 and the movable bearing 12 can be used to suspend one end of the support roller 11 in an unsupported state. The base fabric is then axially fitted onto the two support rollers 11 from this suspended end. After the base fabric is fitted, the bearing 12 is restored to support the ends of the support rollers 11, and the center distance between the two support rollers 11 is adjusted by the first track 13 and the first traveling mechanism 124 to tension the base fabric. The tension can be set according to the material and specifications of the base fabric, or the tension of the base fabric can be detected by a tension sensor and controlled within the process range. The axes of the two support rollers 11 should be kept parallel to avoid base fabric deviation and uneven tension in certain areas.

[0067] The support roller 11 is controlled to operate at a constant speed, for example, 5–50 r / min, the specific speed being determined based on the circumference of the base fabric and the adhesive wetting speed. The support roller 11 drives the annular base fabric to rotate circumferentially through friction, with the outer surface of the base fabric passing sequentially below the coating head. The coating head is manipulated to move axially along the support roller 11, applying adhesive to the coating area of ​​the base fabric during the movement until the adhesive completely covers the coating area; the coating head can be reciprocated multiple times until the adhesive completely covers the middle coating area of ​​the base fabric and reaches the target thickness.

[0068] During the adhesive application and curing process, the fabric clamping assembly 20 clamps the edge areas on both sides of the base fabric located between the two support rollers 11, and applies a tension force outward along the axial direction of the support rollers 11 to the edge areas, ensuring that the width of the base fabric remains within a preset range. To avoid interference between the clamp 21 and the support rollers 11, the clamp 21 employs an intermittent clamping method; that is, the clamp 21 does not continuously clamp the edges of the base fabric throughout the entire process, but only acts on the area between the two support rollers 11. Clamping and outward tensioning are performed, and after tensioning, the clamp 21 releases and returns to its initial position, repeating the next tensioning action. This configuration not only suppresses the slow edge shrinkage of the base fabric during tensioning, keeping the width of the base fabric within the preset range, but also avoids motion interference between the clamp 21 and the support rollers 11.

[0069] After the adhesive is applied and during the curing process, an infrared heating device is used to continue heating the base fabric and the surface of the adhesive to accelerate the curing reaction of the polyurethane adhesive. The heating temperature can be set according to the curing characteristics of the polyurethane adhesive. The heater uses a short-wave heater or a medium-wave heater, which can irradiate a local area of ​​the base fabric and the irradiation range covers the entire width.

[0070] After the adhesive has cured, a boot cover blank is obtained. The outer surface of the boot cover blank is turned and ground. According to the width requirements of the finished boot cover, the edge areas on both sides of the blank are cut to remove areas with uneven thickness or defects that may exist due to clamping and edge shrinkage, thus obtaining the finished boot cover.

[0071] The papermaking boot cover forming apparatus and forming method provided in this application embodiment have multiple moving or executing components during operation, such as a motor for driving the rotation of the support roller 11, a drive motor for driving the first traveling mechanism 124, the second traveling mechanism 233, the third traveling mechanism 33, the movement of the glue coating head and the metering pump, an actuator for controlling the first adjusting mechanism 22 and the second adjusting mechanism 23 in the fabric clamp assembly 20, a lifting mechanism 123 for lifting the pressure cover 122 of the shaft seat 12, and a drive device for lifting the column 34, etc. In addition, the apparatus can also be equipped with electronic components such as position sensors, limit switches, pressure sensors, temperature sensors, and encoders to detect parameters such as the spacing of the support rollers 11, the tension of the base fabric, the position of the clamp 21, and the temperature of the glue solution.

[0072] The operation of the aforementioned electronic components can be automated through a controller or manually operated via a control panel. It should be noted that the core innovation of this application lies in the mechanical structure, spatial layout, and interconnections and coordination of the aforementioned physical components. The aim is to solve the problems of edge shrinkage, width reduction, and uneven edge coating of the base fabric under tension force as mentioned in the background art through structural integration and optimization.

[0073] As for the specific controllers and control schemes used to coordinate the operation of these components, such as programmable logic controllers (PLCs), industrial computers (IPCs), embedded microcontrollers (MCUs), or motion control cards, and the specific control algorithms they run, such as the synchronous control strategy that keeps the clamps 21 of the fabric clamping assembly 20 moving in the same direction and at the same speed as the base fabric, the matching control of the speed of the glue applicator head and the rotation speed of the support roller 11, and the adjustment control of the base fabric tension, these are all well-known and mature technologies in this field. Those skilled in the art, after understanding the hardware structure scheme disclosed in this application, are fully capable of conventionally selecting or combining suitable controller models, designing corresponding control logic circuits, and writing control programs from existing technologies based on specific performance indicators and cost requirements, in order to achieve motion control and signal acquisition and processing of the aforementioned execution components.

[0074] Therefore, even if this application does not provide a detailed description of the controller's internal circuitry, program code, and other specific details, it will not affect the understanding, reproduction, and implementation of the hardware structure scheme claimed in this application by those skilled in the art, and the integrity of the technical solution will not be affected.

[0075] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A shoe cover forming device for papermaking, characterized in that, include: The support assembly (10) includes two support rollers (11) arranged parallel to each other and spaced apart. The outer side of the support rollers (11) is used to cover an annular base fabric. The base fabric has a central adhesive coating area and edge areas located on both sides of the adhesive coating area. The glue applicator head is movably arranged along the axial direction of the support roller (11) for applying glue to the glue application area of ​​the base fabric; Two fabric clamping assemblies (20) correspond to two edge areas of the base fabric along the axial direction of the support roller (11) and are located between the two support rollers (11). The fabric clamping assembly (20) includes a clamp (21), a first adjustment mechanism (22) and a second adjustment mechanism (23). The clamp (21) is used to clamp the edge area of ​​the base fabric. The first adjustment mechanism (22) is connected to the clamp (21) and drives the clamp (21) to reciprocate along the axial direction of the support roller (11). The second adjustment mechanism (23) is connected to the first adjustment mechanism (22) or the clamp (21) and drives the clamp (21) to move along the line connecting the two support rollers (11) so that the clamp (21) can move in the same direction and at the same speed as the base fabric when clamping the edge area.

2. The papermaking boot cover forming device according to claim 1, characterized in that, The end of the support roller (11) is rotatably fitted with a bearing seat (12). The support assembly (10) also includes two first tracks (13). The first tracks (13) are arranged along the line connecting the support rollers (11). The two first tracks (13) are spaced apart along the axial direction of the support rollers (11). Each bearing seat (12) is provided with a first traveling mechanism (124). The bearing seat (12) is movably mounted on the first track (13) through the corresponding first traveling mechanism (124).

3. The papermaking boot cover forming device according to claim 2, characterized in that, The bearing seat (12) is detachably connected to the support roller (11); the support assembly (10) further includes: The second track (14) is arranged horizontally perpendicular to the first track (13). Of the two first tracks (13), one first track (13) is fixedly arranged, and the other first track (13) is slidably engaged with the second track (14). The first driving member (15) is used to drive the corresponding first track (13) to reciprocate along the second track (14). When the first track (13) moves, the bearing (12) located on the first track (13) disengages from the end of the corresponding support roller (11), so that the end is suspended.

4. The papermaking boot cover forming device according to claim 3, characterized in that, The bearing seat (12) includes: The base (121) has a first groove for accommodating the lower part of the shaft end of the support roller (11), the first groove being an arc-shaped groove with the opening facing upward, and the first traveling mechanism (124) is disposed on the base (121). The pressure cap (122) has a second groove for accommodating the upper part of the shaft end of the support roller (11), the second groove being an arc-shaped groove with the opening facing downward; A lifting mechanism (123) is provided on the base (121) and connected to the pressure cover (122) for driving the pressure cover (122) to move up and down.

5. The papermaking boot cover forming device according to claim 3, characterized in that, The second adjustment mechanism (23) includes: The third track (231) is parallel to the first track (13) and slides with the second track (14). The third track (231) is fixedly connected to the movable first track (13) of the two first tracks (13). The slide table (232) is slidably fitted to the third track (231), and the first adjustment mechanism (22) is provided on the slide table (232). The second traveling mechanism (233) is located on the slide (232), and the slide (232) is movably located on the third track (231) via the second traveling mechanism (233).

6. The papermaking boot cover forming device according to claim 3, characterized in that, The support roller (11) is a hollow tubular structure, and the inner hole of the support roller (11) extends through at least one of its non-suspended ends to form an inlet and outlet.

7. The papermaking boot cover forming device according to claim 6, characterized in that, The papermaking boot forming device further includes an auxiliary support mechanism (30), which includes: Two beams (31) are provided at one end of the support roller (11) that forms the inlet and outlet. The two beams (31) are spaced apart along the arrangement direction of the support roller (11). A fourth track is provided at the bottom of the beams (31) along the axial direction of the support roller (11). Two support arms (32) are slidably disposed on the fourth track in a one-to-one correspondence. The support arms (32) extend axially along the support roller (11). When the support roller (11) is in a suspended state, the support arms (32) extend from the inlet and outlet into the inner hole of the support roller (11) to provide support force to the suspended end of the support roller (11); and The third traveling mechanism (33) is used to drive the support arm (32) to reciprocate along the fourth track.

8. The papermaking boot cover forming device according to claim 7, characterized in that, The lower part of the beam (31) is connected to a lifting column (34).

9. A method for forming shoe covers for papermaking, characterized in that, The papermaking boot forming apparatus according to any one of claims 1 to 8 includes the following steps: The annular base fabric is placed on the two support rollers (11), and the distance between the two support rollers (11) is adjusted to keep the base fabric taut. Control the support roller (11) to run at a constant speed, manipulate the glue applicator head to move along the axial direction of the support roller (11), and apply glue to the glue application area of ​​the base fabric during the movement until the glue completely covers the glue application area. During the application and curing of the adhesive, the edge area of ​​the base fabric is intermittently clamped by the fabric clamping assembly (20), and an outward tension is applied to the edge area so that the width of the base fabric is within a preset range. After the adhesive has cured, a boot cover blank is obtained. The outer surface of the boot cover blank is turned and ground, and the edge area is cut to obtain the finished boot cover.

10. The method for forming papermaking boot covers according to claim 9, characterized in that, During the application and curing of the adhesive, an infrared heating device is used to heat the base fabric and the surface of the adhesive.

Images