A double-station ultrasonic welding device for bag-in-box / ton bag feeding port flanging

Abstract

The application discloses a kind of bag of packing / bag of ton inlet double-station supporting and tightening flanging ultrasonic welding equipment, it is related to ultrasonic welding technical field, equipment, slide rail mechanism is installed on rack, first automatic bag supporting and tightening flanging device and second automatic bag supporting and tightening flanging device are along slide rail setting, rack is along the first feeding station, welding station and second feeding station of slide rail extension direction setting, two automatic bag supporting and tightening flanging device moves to welding station alternately;Each automatic bag supporting and tightening flanging device includes outer ring and coaxial annular arrangement tension layer, compression layer and flanging layer, and bag body is supported and tightened, bag mouth is compressed and the edge of inlet is formed by the radial expansion of each layer execution pressure block, and ultrasonic welding mechanism is welded to inlet after flanging in welding station.By the technical scheme of the application, feeding flanging and ultrasonic welding can be alternately and concurrently carried out, the processing efficiency is improved, and the consistency of inlet flanging positioning and the stability of welding are improved.

Description

Technical Field

[0001] This invention relates to the field of ultrasonic welding technology, and in particular to a dual-station support and flange ultrasonic welding device for the feed inlet of a container bag / ton bag. Background Technology

[0002] Woven bags, FIBCs (Flexible Intermediate Bulk Containers), and ton bags typically have a feed inlet to allow materials to enter from the top or side of the bag. To improve the structural strength, opening stability, and reliability of the feed inlet's fit with subsequent sealing, tying, or connectors, the feed inlet edge usually needs to be flanged and then fixed by welding. For bags made of woven plastic materials, ultrasonic welding utilizes high-frequency vibration to fuse localized materials, offering advantages such as no need for stitching, fast welding speed, and relatively stable connections. Therefore, it can be used for connecting the flanged parts of the feed inlet of FIBCs / ton bags.

[0003] In the current welding process for the feed inlet of FIBCs / ton bags, it is usually necessary to manually fit the bag body into the positioning fixture and manually adjust the edge of the bag opening to keep the feed inlet open before flanging and welding. Because the material of FIBCs / ton bags is soft, the feed inlet is prone to wrinkles, skewing, or local collapse during processing. Without a reliable support, compression, and flanging structure, it is difficult to maintain a consistent flanging width and circumferential position, which in turn affects the accuracy of the subsequent ultrasonic welding position and the welding quality.

[0004] In addition, existing processing methods mostly adopt single-station operations, that is, feeding, bag opening, flanging, welding and unloading are completed sequentially at the same station. When the welding equipment is working, the operator cannot simultaneously complete the feeding and flanging preparation of the next bag; and there is a waiting time between manually tidying the bag mouth and the equipment welding, resulting in low equipment utilization, slow processing cycle, and difficulty in meeting the needs of batch continuous production.

[0005] Furthermore, the feed inlet is typically annular or nearly circular. If it is processed point-by-point using only a few welding points or individual welding heads, problems such as uneven distribution of welding points, localized stress concentration, or long processing cycles can easily occur. For FIBC / TOVAL feed inlets requiring a circumferentially fixed flange structure, the key technical problem to be solved is how to perform multi-point circumferential welding on the flanged feed inlet while ensuring the bag opening is stably tightened and the flange is formed, and how to ensure a continuous cycle between the feeding and flanged processes and the welding process. Summary of the Invention

[0006] To address the aforementioned problems, this invention provides a dual-station ultrasonic welding device for the feed inlet of FIBCs / ton bags. By assembling a slide rail mechanism, a first automatic bag-supporting, pressing, and flanging device, a second automatic bag-supporting, pressing, and flanging device, and an ultrasonic welding mechanism on the frame, the two automatic bag-supporting, pressing, and flanging devices can alternately switch between the feeding station and the welding station. Simultaneously, each automatic bag-supporting, pressing, and flanging device sequentially supports, positions, and flangs the feed inlet of the FIBC / ton bag through a tension layer, a pressing layer, and a flanging layer. This ensures that the flexible bag body maintains a stable annular flanged state before welding, reducing wrinkles, skewing, and inconsistent flanging caused by manual bag opening adjustments, and improving the accuracy of the correspondence between the feed inlet flanging position and the ultrasonic welding position. When one automatic bag-supporting, pressing, and flanging device is performing ultrasonic welding at the welding station, another automatic bag-supporting, pressing, and flanging device can simultaneously complete feeding and flanging preparation at the feeding station, thereby shortening equipment waiting time and improving continuous processing efficiency; multiple ultrasonic welding heads weld the flanged feed inlet along the circumferential direction, which helps to improve welding uniformity and feed inlet connection stability.

[0007] To achieve the above objectives, the present invention provides a dual-station support and flange ultrasonic welding equipment for the feed inlet of a container bag / ton bag, comprising a frame, a slide rail mechanism, a first automatic bag support and clamping flange device, a second automatic bag support and clamping flange device, and an ultrasonic welding mechanism. The slide rail mechanism is mounted on the frame, and the first automatic bag-supporting, pressing and flanging device and the second automatic bag-supporting, pressing and flanging device are both slidably mounted on the slide rail mechanism. The frame is provided with a first loading station, a welding station and a second loading station along the extension direction of the slide rail mechanism, and the welding station is located between the first loading station and the second loading station. The first automatic bag-supporting, pressing, and flanging device and the second automatic bag-supporting, pressing, and flanging device are respectively used to support, press, and flanging the feed inlet of the container bag / ton bag, and alternately move to the welding station under the drive of the slide rail mechanism, so that when one of the automatic bag-supporting, pressing, and flanging devices is located at the welding station, the other automatic bag-supporting, pressing, and flanging device is located at the first feeding station or the second feeding station; Both the first automatic bag-supporting, pressing, and flanging device and the second automatic bag-supporting, pressing, and flanging device include an outer ring and a tension layer, a pressing layer, and a flanging layer arranged coaxially in a ring. The tension layer, the pressing layer, and the flanging layer are arranged sequentially from bottom to top, and each is provided with an execution block that is distributed along the circumference and can be radially extended and retracted. The execution block of the tension layer is used to stretch the FIBC / TUN bag body outward and press it against the inner wall of the outer ring. The execution block of the pressing layer is used to press and position the bag body near the feed inlet. The execution block of the flanging layer is used to fold the edge of the feed inlet outward and form it with the upper port of the outer ring. The ultrasonic welding mechanism is located at the welding station. The ultrasonic welding mechanism includes multiple ultrasonic welding heads distributed circumferentially. The ultrasonic welding heads are used to perform ultrasonic welding on the feed inlet of the FIBC / TUN bag after it has been flanged.

[0008] In the above technical solution, preferably, when the first automatic bag-supporting, pressing and flanging device performs ultrasonic welding at the welding station, the second automatic bag-supporting, pressing and flanging device is located at the second feeding station to perform feeding, supporting, pressing and flanging. When the second automatic bag-supporting, pressing, and flanging device performs ultrasonic welding at the welding station, the first automatic bag-supporting, pressing, and flanging device is located at the first feeding station to feed, support, press, and flang.

[0009] In the above technical solution, preferably, both the first automatic bag-supporting, pressing, and flanging device and the second automatic bag-supporting, pressing, and flanging device include a chassis and a positioning ring. The positioning ring and the outer ring are coaxially arranged. The tension layer, the pressing layer, and the flanging layer are arranged around the positioning ring. The positioning ring is detachably connected to the chassis so as to adapt to the feed inlets of different diameter FIBCs / ton bags by replacing positioning rings of different specifications. The chassis is connected to the movable bearing part on the slide rail mechanism.

[0010] In the above technical solution, preferably, the inner wall of the outer ring forms a radial positioning reference surface for the container bag / ton bag body, and the upper port of the outer ring forms a flange forming support part when the feed inlet edge is folded outward; after the pressing block of the pressing layer extends radially, it presses the bag body near the feed inlet against the inner wall of the outer ring.

[0011] In the above technical solution, preferably, the tension layer, the pressing layer and the flanging layer are each provided with twelve execution pressure blocks evenly distributed along the circumference, and the execution pressure blocks of the three layers are arranged one-to-one with each other along the axial direction of the corresponding automatic bag-supporting, pressing and flanging device.

[0012] In the above technical solution, preferably, both the first automatic bag-supporting, pressing, and flanging device and the second automatic bag-supporting, pressing, and flanging device include a rotary cylinder and a transmission mechanism. The rotary cylinder drives the tensioning layer, the pressing layer, and the flanging layer's execution blocks to extend or retract radially through the transmission mechanism. The transmission mechanism includes at least one of a linkage mechanism, a cam disc, and / or a grooved disc.

[0013] In the above technical solution, preferably, the flange layer of the first automatic bag-supporting and pressing flange device and the second automatic bag-supporting and pressing flange device both include a radial guide shaft, a linear bearing, and a flange pressing block as an execution pressing block. The radial guide shaft extends radially and is arranged perpendicular to the central axis of the corresponding automatic bag-supporting and pressing flange device. The flange pressing block is mounted on the radial guide shaft through the linear bearing and extends or retracts radially along the radial guide shaft. The extension stroke of the flange pressing block is adjustable to adjust the flange width of the feed port of the container bag / ton bag.

[0014] In the above technical solution, preferably, the slide rail mechanism includes a linear guide rail module and a servo drive component. The servo drive component is used to drive the first automatic bag-supporting, pressing, and flanging device and the second automatic bag-supporting, pressing, and flanging device to move along the linear guide rail module, and to position the first automatic bag-supporting, pressing, and flanging device at the first feeding station or the welding station, and to position the second automatic bag-supporting, pressing, and flanging device at the second feeding station or the welding station.

[0015] In the above technical solution, preferably, the ultrasonic welding mechanism further includes a welding station frame and multiple ultrasonic welding head mounting seats. The multiple ultrasonic welding head mounting seats are distributed circumferentially on the welding station frame and are arranged one-to-one with the multiple ultrasonic welding heads. Each ultrasonic welding head mounting seat includes a mounting bracket and a lifting cylinder. The ultrasonic welding head is installed at the output end of the lifting cylinder. The lifting cylinder is used to drive the ultrasonic welding head to move up and down to adjust the welding pressure and / or welding stroke of the ultrasonic welding head on the feed port of the flanged FIBC / TUN bag. A preset number of ultrasonic welding heads are evenly distributed circumferentially.

[0016] In the above technical solution, preferably, the circumferential distribution position of the ultrasonic welding heads corresponds to the circumferential welding position of the inlet of the FIBC / ton bag after it is flanged. When the first automatic bag-supporting and pressing flanged device or the second automatic bag-supporting and pressing flanged device moves to the welding station, the welding ends of the multiple ultrasonic welding heads are respectively aligned with the corresponding circumferential positions of the inlet of the FIBC / ton bag after it is flanged, so as to perform circumferential multi-point synchronous welding on the inlet of the FIBC / ton bag.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: (1) By setting a slide rail mechanism on the frame and making the first automatic bag-supporting, pressing and flanging device and the second automatic bag-supporting, pressing and flanging device move alternately between the feeding station and the welding station along the slide rail mechanism, it is possible to make the other automatic bag-supporting, pressing and flanging device complete feeding, supporting, pressing and flanging preparation simultaneously when one of the automatic bag-supporting, pressing and flanging devices is performing ultrasonic welding, thereby reducing the waiting time between feeding and welding and improving the continuous operation capability and batch processing efficiency of the equipment.

[0018] (2) The structure of tension layer, compression layer and flange layer arranged coaxially from bottom to top is adopted. Each layer of the pressure block expands and contracts radially along the circumference, which can sequentially tighten the bag body of the container bag / ton bag, press and position the bag body near the feed inlet, and fold the edge of the feed inlet outward to form a shape, so that the flexible container bag / ton bag feed inlet maintains a relatively stable ring flange state before welding, reducing the problems of bag mouth wrinkles, skewing and inconsistent flange width.

[0019] (3) A radial positioning reference surface of the bag body is formed through the inner wall of the outer ring, and a flange forming support part is formed through the upper port of the outer ring, so that the tensioning, pressing and flange forming actions have a clear forming reference. With the positioning ring, the chassis and the detachable positioning structure, it can be adapted to the feed port of the container bag / ton bag of different diameter specifications, improving the equipment changeover convenience and processing applicability.

[0020] (4) The tensioning layer, pressing layer and flanging layer are driven to extend and retract radially by rotating cylinder and transmission mechanism. This enables the coordinated action of multiple pressing blocks in the circumferential direction, reduces manual bag support and manual flanging operations, and improves the consistency of the supporting, pressing and flanging actions. The flanging layer further uses radial guide shaft and linear bearing to guide the flanging pressing block, which can improve the stability of the radial movement of the flanging pressing block and adapt to different flanging width requirements by adjusting the extension stroke.

[0021] (5) By setting up multiple ultrasonic welding heads distributed along the circumference, and driving the welding heads up and down through the welding head mounting base and lifting cylinder, multiple welding heads can be aligned with the corresponding circumferential positions of the feed inlet of the container bag / ton bag after the flange is turned and perform multi-point synchronous welding in the circumferential direction. This shortens the welding time, improves the uniformity of the welding point distribution, reduces the risk of local stress concentration or local missing welding, and thus improves the stability of the feed inlet flange connection and the consistency of the finished product. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of a dual-station support and flange ultrasonic welding device for the feed inlet of a container bag / ton bag, as disclosed in one embodiment of the present invention. Figure 2 This is a schematic diagram illustrating the different workstation setup methods disclosed in one embodiment of the present invention; Figure 3 This is an exploded structural diagram of the tension layer, compression layer, and flange layer disclosed in one embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of the flanged layer disclosed in one embodiment of the present invention; Figure 5 This is a schematic diagram of the structure of an automatic bag-supporting, pressing, and flanging device disclosed in one embodiment of the present invention; Figure 6 This is a schematic diagram of the ultrasonic welding mechanism disclosed in one embodiment of the present invention.

[0023] In the diagram, the correspondence between the components and the reference numerals is as follows: 1. First automatic bag-supporting, pressing, and flanging device; 2. Second automatic bag-supporting, pressing, and flanging device; 3. Slide rail mechanism; 4. First feeding station; 5. Welding station; 6. Second feeding station; 7. Welding station frame; 8. Ultrasonic welding head mounting base; 9. Ultrasonic welding head; 10. Mounting bracket; 11. Lifting cylinder; 12. Flanging layer; 13. Pressing layer; 14. Tensioning layer; 15. Positioning ring; 16. Chassis; 17. Outer ring; 19. Radial guide shaft; 20. Rotary cylinder; 21. Cam plate and / or groove plate; 22. Frame; 23. Execution block of tensioning layer; 24. Execution block of pressing layer; 25. Execution block of flanging layer. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] The present invention will now be described in further detail with reference to the accompanying drawings: like Figures 1 to 3 As shown, the ultrasonic welding equipment for dual-station support and flange of the feed inlet of a container bag / ton bag according to the present invention includes a frame 22, a slide rail mechanism 3, a first automatic bag support and clamping flange device 1, a second automatic bag support and clamping flange device 2, and an ultrasonic welding mechanism.

[0026] The frame 22 adopts a frame structure and serves as the main support foundation for the equipment. It provides a stable installation platform for the slide rail mechanism 3, welding station frame 7, and related functional components, ensuring the stability of the relative positions of each component during high-frequency continuous operation.

[0027] The slide rail mechanism 3 is mounted on the frame 22. The first automatic bag-supporting, pressing and flanging device 1 and the second automatic bag-supporting, pressing and flanging device 2 are both slidably mounted on the slide rail mechanism 3 and can move precisely back and forth along the extension direction of the slide rail under the drive of the slide rail mechanism 3.

[0028] The frame 22 is provided with a first loading station 4, a welding station 5 and a second loading station 6 along the extension direction of the slide rail mechanism 3. The welding station 5 is located between the first loading station 4 and the second loading station 6. The three-station layout constitutes the dual-station cyclic operation framework of the equipment.

[0029] The first automatic bag-opening, pressing, and flanging device 1 and the second automatic bag-opening, pressing, and flanging device 2 are used to open, press, and flang the feed inlet of the FIBC / TOVAL. Driven by the slide rail mechanism 3, they alternately move to the welding station 5. During processing, one of the automatic bag-opening, pressing, and flanging devices carries the opened FIBC / TOVAL feed inlet, which has already been opened, pressed, and flanged, to the welding station 5, where the ultrasonic welding mechanism welds the flanged feed inlet. Meanwhile, the other automatic bag-opening, pressing, and flanging device is located at the corresponding loading station, preparing for the loading, opening, pressing, and flanging of the next FIBC / TOVAL. By alternating the movement of the two automatic bag-opening, pressing, and flanging devices, this dual-station alternating cyclic operation mode ensures that the loading and welding processes overlap at least partially in time, allowing the loading preparation process and the welding process to proceed in parallel, reducing equipment idle time.

[0030] The first automatic bag-supporting, pressing, and flanging device 1 and the second automatic bag-supporting, pressing, and flanging device 2 have the same structure, both including an outer ring 17 and a tension layer 14, a pressing layer 13, and a flanging layer 12 arranged coaxially in a ring. The tension layer 14, the pressing layer 13, and the flanging layer 12 are arranged sequentially from bottom to top, and each is provided with an execution block that is distributed along the circumference and can extend and retract radially. After the execution block 23 of the tension layer extends radially outward, it pushes the container bag / ton bag body fitted into the device outward and abuts against the inner wall of the outer ring 17, so that the flexible bag body forms a relatively stable circumferential support state; the execution block 24 of the pressing layer further presses and positions the bag body near the feed inlet, reducing the movement of the bag body during the flanging and welding process; the execution block 25 of the flanging layer folds the edge of the feed inlet outward and cooperates with the upper end of the outer ring 17 to form a stable flanging structure.

[0031] An ultrasonic welding mechanism is installed at welding station 5, including multiple circumferentially distributed ultrasonic welding heads 9. The welding end of each welding head precisely corresponds to the flanged position of the feed inlet of the flanged FIBC / TOVAL, performing circumferential multi-point synchronous ultrasonic welding on the feed inlet of the flanged FIBC / TOVAL. Ultrasonic welding uses the heat energy generated by high-frequency vibration to melt and bond the materials to be welded at the contact interface of the flanged part of the feed inlet, forming a seamless, needle-free, heat-fusion joint with strong sealing performance and high tensile strength. It can reduce defects such as thread breakage, seam cracking, and pinhole leakage in traditional needle and thread sewing, significantly improving the sealing performance and mechanical strength of the feed inlet seal.

[0032] In this embodiment, by combining the dual-station cyclic operation frame with the ultrasonic welding process, circumferential welding can be performed after the feed inlet is stretched, pressed and flanged, reducing the impact of bag opening wrinkles, skewing and uneven flanging on welding quality, and improving continuous processing efficiency through dual-station alternating operation.

[0033] In the above embodiments, preferably, the first automatic bag-supporting, pressing, and flanging device 1 and the second automatic bag-supporting, pressing, and flanging device 2 operate in an alternating left-right or end-to-end manner. Specifically, when the first automatic bag-supporting, pressing, and flanging device 1 is performing ultrasonic welding at the welding station 5, the feed inlet of the container bag / ton bag it carries has already been supported, pressed, and flanged, and the ultrasonic welding mechanism welds the feed inlet; simultaneously, the second automatic bag-supporting, pressing, and flanging device 2 is located at the second loading station 6, where the operator or loading mechanism can insert the container bag / ton bag, and the second automatic bag-supporting, pressing, and flanging device 2 completes the support, pressing, and flanging. The above processes are completed within the welding time window of the first device, achieving complete overlap of the two processes.

[0034] After the first automatic bag-supporting, pressing, and flanging device 1 completes welding, it exits welding station 5 under the drive of slide rail mechanism 3 and returns to the first loading station 4 to prepare for the loading and flanging of the next FIBC / TBM. At the same time, the second automatic bag-supporting, pressing, and flanging device 2 moves from the second loading station 6 into welding station 5 under the drive of slide rail mechanism 3 for ultrasonic welding. This cycle continues, with the first and second devices alternately occupying welding station 5, ensuring that welding station 5 is always in an effective welding state, reducing idle waiting time, and forming a continuous and uninterrupted dual-station cyclic operation mode.

[0035] In this embodiment, through the coordination of these workstations, the first loading station 4, the welding station 5, and the second loading station 6 form a dual-station cycle, so that the welding action and the loading and flanging action overlap in time, thereby improving equipment utilization and batch production cycle.

[0036] In the above embodiments, preferably, the first automatic bag-supporting, pressing and flanging device 1 and the second automatic bag-supporting, pressing and flanging device 2 both include a chassis 16 and a positioning ring 15. The chassis 16 serves as the mounting base for the automatic bag-supporting, pressing and flanging device and is connected to the movable bearing part on the slide rail mechanism 3, so that the entire automatic bag-supporting, pressing and flanging device can move along the slide rail mechanism 3 with the movable bearing part to the feeding station or welding station 5.

[0037] The positioning ring 15 and outer ring 17 are coaxially arranged and installed in the central area of ​​the device. The tensioning layer 14, the pressing layer 13, and the flange layer 12 are arranged around the positioning ring 15. The positioning ring 15 provides a coaxial mounting and positioning base for the multi-layer ring mechanism, enabling each layer of actuators to move around the same center during radial expansion and contraction, reducing flange forming eccentricity. The positioning ring 15 acts as an inner skeleton in the device, providing a unified coaxial reference for the radial movement of the three layers of actuators, ensuring that the tensioning, pressing, and flange forming actions are symmetrically unfolded with the axis of the positioning ring 15 as the center, so that the feed inlet of the FIBC / TUN bag is subjected to uniform force and consistent forming in the circumferential direction.

[0038] The positioning ring 15 and chassis 16 are detachable, allowing for quick assembly and disassembly via positioning pins and bolts. When processing inlets of FIBCs / ton bags with different diameters, the center positioning dimension of the device can be adjusted by replacing the positioning ring 15 with a different specification, without replacing the entire device. This improves the equipment's adaptability to different bag opening specifications and reduces changeover time and costs. FIBC and ton bag inlet diameters vary widely, typically ranging from 300mm to 600mm. The detachable positioning ring 15 design allows for rapid switching between different product specifications on the same machine, significantly improving the equipment's product adaptability and production flexibility.

[0039] In the above embodiment, preferably, the inner wall of the outer ring 17 forms a radial positioning reference surface for the FIBC / ton bag body. When the FIBC / ton bag is fitted into the automatic bag-supporting and pressing flange device, the tensioning layer's execution block 23 expands the bag body from the inside out and evenly abuts against the inner wall of the outer ring 17. The cylindrical inner surface of the inner wall of the outer ring 17 serves as a positioning reference for the roundness and radial dimension of the FIBC / ton bag's inlet, ensuring that the inlet maintains a standard circular outline under the tensioned state, eliminating defects such as local dents and deformations of the bag body, and ensuring that the flange width and welding position of each circumferential position of the inlet have a high degree of consistency, making the circumferential shape of the inlet tend to be stable.

[0040] The upper port of the outer ring 17 forms a flange forming support when the edge of the feed inlet folds outward. When the execution pressure block 25 of the flange layer is pushed radially outward, it pushes the edge of the feed inlet towards the upper port of the outer ring 17. The profile of the upper port of the outer ring 17 serves as the support and limit for flange forming, so that the edge of the feed inlet folds outward neatly along the upper port of the outer ring 17, forming a standard flange structure with consistent width and uniform angle. The flatness and cylindricity of the upper port of the outer ring 17 directly determine the flange forming quality. During processing, it is necessary to ensure the machining accuracy of the upper end face of the outer ring 17 to ensure that the flatness of the flanged surface of the entire feed inlet ring after flange forming meets the process requirements of ultrasonic welding for the welding contact surface.

[0041] After the pressing block 24 of the pressing layer extends radially, it presses the bag body near the feed inlet against the inner wall of the outer ring 17. This can press and fix the bag body in the upper area of ​​the feed inlet to the inner wall of the outer ring 17 for a second time, preventing irregular folding of the feed inlet edge due to bag body loosening when the flange layer 12 is in operation. At the same time, it prevents the bag body from axially moving due to welding vibration during ultrasonic welding, ensuring stable welding position and improving welding consistency.

[0042] In this embodiment, the positioning reference and the flanging reference are provided by the inner wall of the outer ring 17 and the upper port of the outer ring 17, respectively, which can improve the stability of the flanging forming of the feed port.

[0043] In the above embodiment, preferably, each of the tension layer 14, the compression layer 13 and the flange layer 12 is provided with twelve execution pressure blocks evenly distributed along the circumference. The execution pressure blocks of the three layers are arranged one-to-one with each other along the axial direction of the corresponding automatic bag-supporting, pressing and flange-flipping device, that is, the tension layer 14 execution pressure block, the compression layer 13 execution pressure block and the flange layer 12 execution pressure block are respectively provided at the same circumferential angle position.

[0044] The twelve pressing blocks create a relatively uniform support, clamping, and flanging point along the circumference of the feed inlet. The central angle between adjacent blocks is 30°, covering the entire circumference of the feed inlet. This prevents localized stress concentration or insufficiently expanded areas that can occur when only a few blocks are in use. If the number of blocks is too small, the arc between adjacent blocks will be too long, resulting in a lack of radial support for the bag in that area. This can cause inward concavity in some areas of the feed inlet due to insufficient clamping force, leading to uneven flanging and ultimately affecting welding quality.

[0045] At the same circumferential position, the bag body can first be stretched by the tension layer 14, then positioned by the compression layer 13, and finally flanged by the flanging layer 12. The three layers form a coordinated axial constraint system, and the action path and the force position have a corresponding relationship.

[0046] In this embodiment, the structure helps to maintain a relatively consistent flange width and flange shape at the feed inlet of the FIBC / TUN bag within the entire circumference, thereby improving the consistency of subsequent ultrasonic welding.

[0047] like Figure 4 and Figure 5 As shown, in the above embodiments, preferably, both the first automatic bag-supporting, pressing, and flanging device 1 and the second automatic bag-supporting, pressing, and flanging device 2 include a rotary cylinder 20 and a transmission mechanism. The rotary cylinder 20 drives the tensioning layer's execution block 23, the pressing layer's execution block 24, and the flanging layer's execution block 25 to extend or retract radially, respectively, through the transmission mechanism. The rotary cylinder 20 is installed in the corresponding automatic bag-supporting, pressing, and flanging device to provide rotational driving force to the transmission mechanism. In a preferred embodiment, the rotary cylinder 20 is an MSQB-20A swing cylinder, installed at the central axis of the device, and its output shaft is connected to the transmission mechanism. As a single drive source, the rotary cylinder 20 has a simpler air path control logic compared to a drive scheme that configures independent cylinders for each layer. Only the forward and reverse rotation of the rotary cylinder 20 is needed to achieve synchronous extension and retraction of the three layers of pressing blocks. The synchronization of the three-layer pressing blocks is guaranteed by the mechanical constraints of the transmission mechanism, without relying on electrical control timing coordination. The consistency of the action is reliable and the failure rate is low in high-frequency cyclic operation. The rotary cylinder 20 is installed at the central axis of the device, with a compact structure that does not occupy radial layout space, which is conducive to the reasonable arrangement of the three-layer pressing blocks and their guiding mechanism.

[0048] The transmission mechanism includes at least one of a linkage mechanism, a cam disc, and / or a grooved disc 21, to convert the rotational motion of the rotary cylinder 20 into the radial extension and retraction motion of each layer of actuator blocks. The cam disc and / or grooved disc 21 are provided with curved grooves, and each actuator block is provided with a follower pin or roller, which is embedded in the curved groove of the cam disc or grooved disc. When the rotary cylinder 20 drives the cam disc or grooved disc to rotate, the contour of the curved groove forces the follower pin to displace radially, accurately converting the rotational motion into the radial linear extension and retraction motion of the actuator blocks. The stroke of each layer of actuator blocks is uniquely determined by the shape of the curved groove, resulting in high repeatability and suitability for the batch and standardized flanging process requirements of FIBC and ton bag inlets.

[0049] During implementation, after the rotary cylinder 20 is activated, the transmission mechanism drives the tensioning layer's actuator block 23, the pressing layer's actuator block 24, and the flanging layer's actuator block 25 to extend or retract radially. Each actuator block can perform tensioning, pressing, and flanging actions according to the processing sequence, and then retract back to its original position after completion, so that the processed container bag / ton bag can be removed or the next loading can be carried out.

[0050] In this embodiment, the radial movement of multiple pressing blocks is achieved by a rotary cylinder 20 in conjunction with a transmission mechanism, which can reduce the number of driving elements, make the movement of the annular multi-pressing blocks more coordinated, and improve the compactness of the device structure.

[0051] In the above embodiments, preferably, the flange layer 12 of the first automatic bag-supporting and pressing flange device 1 and the second automatic bag-supporting and pressing flange device 2 both include a radial guide shaft 19, a linear bearing, and a flange pressing block as an execution pressing block, namely the execution pressing block 25 of the flange layer. The radial guide shaft 19 extends radially and is arranged perpendicular to the central axis of the corresponding automatic bag-supporting and pressing flange device. The flange pressing block is installed on the radial guide shaft 19 through the linear bearing and extends or retracts radially along the radial guide shaft 19. The extension stroke of the flange pressing block is adjustable to adjust the flange width of the feed port of the container bag / ton bag.

[0052] In the guide structure where the radial guide shaft 19 cooperates with the linear bearing, the linear bearing is a rolling friction element. The friction coefficient of the flanging block on the guide shaft is extremely low, and the extension and retraction actions are smooth and without jamming. It has good consistency in high-frequency batch operations and a long service life. The radial guide shaft 19 forms a rigid constraint on the movement direction of the flanging block, ensuring that the movement path of the flanging block is strictly along the radial direction of the device. This prevents the flanging block from circumferentially deflecting during the extension process, ensuring that the final contact position of each flanging block with the upper port of the outer ring 17 is accurate and the flanging direction is consistent. This avoids the height difference of the welding surface caused by uneven flanging angles at different circumferential positions. In addition, the guide shaft structure allows the movement stroke of the flanging block to be precisely set by mechanical limit. The stroke setting value directly determines the flanging width and is not affected by cylinder pressure fluctuations, resulting in high repeatability.

[0053] When the flanging layer 12 actuates, the flanging block extends or retracts radially along the radial guide shaft 19 under the guidance of the linear bearing. The linear bearing reduces the frictional resistance of the flanging block during radial movement and limits its direction of movement, ensuring a relatively stable linear trajectory as the flanging block pushes the feed inlet edge outward. The extension stroke of the flanging block is adjustable, so the maximum extension stroke can be changed by adjusting the position of the limiting mechanism according to different feed inlet diameters, material thicknesses, or required flanging widths of FIBCs / TB bags.

[0054] In this embodiment, the structure helps to improve the consistency of the flange width and enhances the equipment's adaptability to bags of different sizes.

[0055] In the above embodiment, preferably, the slide rail mechanism 3 includes a linear guide rail module and a servo drive. The linear guide rail module provides a high-precision linear motion basis for the reciprocating movement of the two automatic bag-supporting, pressing, and flanging devices. The straightness and parallelism of the guide rail ensure that the two devices always move smoothly along a preset path during the movement. The servo drive is used to drive the first automatic bag-supporting, pressing, and flanging device 1 and the second automatic bag-supporting, pressing, and flanging device 2 to move along the linear guide rail module, and to position the first automatic bag-supporting, pressing, and flanging device 1 at the first feeding station 4 or the welding station 5, and to position the second automatic bag-supporting, pressing, and flanging device 2 at the second feeding station 6 or the welding station 5. The servo drive achieves closed-loop position control through encoder feedback, and the positioning accuracy can reach ±0.1mm, ensuring that the flanging position of the inlet of the device corresponds precisely to the welding end of the ultrasonic welding head 9 after each movement into the welding station 5, avoiding the welding head pressing and flanging position shifting, weak welding, or damage to the bag body due to positioning errors.

[0056] During operation, the servo drive enables the first automatic bag-supporting, pressing, and flanging device 1 to move between the first loading station 4 and the welding station 5, and enables the second automatic bag-supporting, pressing, and flanging device 2 to move between the second loading station 6 and the welding station 5. The speed of the servo drive can be adjusted according to the production cycle requirements. While ensuring positioning accuracy, it increases the moving speed of the two devices between the three stations, shortens the station switching time, and further compresses the processing cycle of each product.

[0057] In this embodiment, position control via servo drive improves the positioning accuracy of the two automatic bag-supporting, pressing, and flanging devices when they enter welding station 5, ensuring that the feed inlet of the flanged FIBC / TOVAL accurately aligns with the welding position of the ultrasonic welding mechanism. This structure helps ensure smooth movement and accurate positioning during the dual-station cycle, reducing welding misalignment.

[0058] like Figure 6 As shown, in the above embodiment, preferably, the ultrasonic welding mechanism further includes a welding station frame 7 and multiple ultrasonic welding head mounting seats 8. The multiple ultrasonic welding head mounting seats 8 are distributed circumferentially on the welding station frame 7 and are arranged one-to-one with multiple ultrasonic welding heads 9. The welding station frame 7 is used to support and fix each ultrasonic welding head mounting seat 8, so that each ultrasonic welding head 9 can be arranged around the feed port flange area of ​​the welding station 5 and bear the reaction force generated by the downward pressure of the welding head during the welding process, thereby reducing the risk of deformation and vibration of the welding station frame 7 during continuous operation and transmission to the main body of the frame 22.

[0059] Each ultrasonic welding head mounting base 8 includes a mounting bracket 10 and a lifting cylinder 11. The ultrasonic welding head 9 is mounted on the output end of the lifting cylinder 11. The lifting cylinder 11 drives the ultrasonic welding head 9 to move up and down, so that the ultrasonic welding head 9 can press down to contact the inlet of the flanged FIBC / TBC during welding and rise to return to its original position after welding is completed. By adjusting the stroke and downward pressure of the lifting cylinder 11, the welding pressure and / or welding stroke of the ultrasonic welding head 9 on the inlet of the flanged FIBC / TBC can be adjusted.

[0060] After the automatic bag-supporting, pressing, and flanging device moves into welding station 5 and completes precise positioning, each lifting cylinder 11 synchronously drives the corresponding ultrasonic welding head 9 to move downwards, so that the working end of the welding head contacts the flanged surface of the feed inlet after flanging, applying a preset welding pressure. The ultrasonic welding head 9 causes the material to be welded at the flanged part to melt and bond at the contact interface. The stroke and output of the lifting cylinder 11 can be set by adjusting the air pressure. The welding pressure and downward stroke can be adjusted for FIBCs / ton bags of different thicknesses and materials to ensure that the welding contact surface is fully stressed and melts evenly.

[0061] In practical implementation, a preset number of ultrasonic welding heads 9 are evenly distributed circumferentially, for example, ten ultrasonic welding heads 9 can be set. Multiple welding heads act simultaneously or in coordination on the circumferential area of ​​the feed port after flanging. Each welding head is responsible for welding at the corresponding circumferential position. The synchronous action of multiple welding heads can shorten the welding time of a single piece and make the welding points more evenly distributed along the circumferential direction, thereby improving the stability of the feed port flanging connection.

[0062] In the above embodiment, preferably, the circumferential distribution position of the ultrasonic welding head 9 corresponds to the circumferential welding position of the feed port of the FIBC / TUN bag after it is turned over. When the first automatic bag-supporting and pressing turning device 1 or the second automatic bag-supporting and pressing turning device 2 moves to the welding station 5, the feed port of the FIBC / TUN bag after it is turned over is located in the welding area surrounded by multiple ultrasonic welding heads 9.

[0063] During the assembly stage of the welding mechanism, the circumferential installation angle of each ultrasonic welding head 9 on the welding station frame 7 is precisely calibrated with the center of the feed port flange surface after the automatic bag-supporting and pressing flange device moves into the welding station 5 as the reference. This ensures that the circumferential distribution radius of the welding end of each welding head is consistent with the flange radius of the feed port flange surface, and the working axis of each welding head is perpendicular to the local tangent plane of the feed port flange surface. This ensures that the contact between the welding head and the flange surface is positive pressure contact, and the welding pressure direction is consistent with the normal direction of the flange surface, thereby increasing the effective contact area and the efficiency of welding heat transfer.

[0064] After the first automatic bag-supporting, pressing, and flanging device 1 or the second automatic bag-supporting, pressing, and flanging device 2 moves to the welding station 5 and completes precise positioning under the drive of the slide rail mechanism 3, the welding ends of multiple ultrasonic welding heads 9 are respectively aligned with the corresponding circumferential positions of the inlet of the FIBC / TUN bag after flanging. Each lifting cylinder 11 synchronously drives each welding head to press down, performing multi-point synchronous welding on the circumferential flanging surface of the inlet. Taking 10 welding heads evenly distributed as an example, the central angle between adjacent welding heads is 36°. Each welding head is responsible for welding the corresponding circumferential arc segment. After the 10 welding heads are welded synchronously, the entire inlet is welded and fixed at 10 evenly spaced circumferential positions.

[0065] Multiple ultrasonic welding heads 9 are aligned with the corresponding circumferential positions of the inlet of the FIBC / TOB bag after it has been flanged, enabling simultaneous multi-point circumferential welding of the inlet. During welding, the multiple ultrasonic welding heads 9 are pressed down to the predetermined welding positions to perform simultaneous multi-point circumferential welding on the flanged part of the inlet, resulting in a more uniform connection effect in the circumferential direction of the flanged structure. Since each welding end corresponds to a different circumferential position, it avoids problems such as long processing time and cumulative positioning errors caused by moving a single welding head point by point, reducing the risk of local missed welds, incomplete welds, or inconsistent connection strength.

[0066] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A dual-station ultrasonic welding device for tightening and flanging the feed inlet of a container bag / ton bag, characterized in that, Includes a frame, a slide rail mechanism, a first automatic bag-supporting, pressing, and flanging device, a second automatic bag-supporting, pressing, and flanging device, and an ultrasonic welding mechanism; The slide rail mechanism is mounted on the frame, and the first automatic bag-supporting, pressing and flanging device and the second automatic bag-supporting, pressing and flanging device are both slidably mounted on the slide rail mechanism. The frame is provided with a first loading station, a welding station and a second loading station along the extension direction of the slide rail mechanism, and the welding station is located between the first loading station and the second loading station. The first automatic bag-supporting, pressing, and flanging device and the second automatic bag-supporting, pressing, and flanging device are respectively used to support, press, and flanging the feed inlet of the container bag / ton bag, and alternately move to the welding station under the drive of the slide rail mechanism, so that when one of the automatic bag-supporting, pressing, and flanging devices is located at the welding station, the other automatic bag-supporting, pressing, and flanging device is located at the first feeding station or the second feeding station; Both the first automatic bag-supporting, pressing, and flanging device and the second automatic bag-supporting, pressing, and flanging device include an outer ring and a tension layer, a pressing layer, and a flanging layer arranged coaxially in a ring. The tension layer, the pressing layer, and the flanging layer are arranged sequentially from bottom to top, and each is provided with an execution block that is distributed along the circumference and can be radially extended and retracted. The execution block of the tension layer is used to stretch the FIBC / TUN bag body outward and press it against the inner wall of the outer ring. The execution block of the pressing layer is used to press and position the bag body near the feed inlet. The execution block of the flanging layer is used to fold the edge of the feed inlet outward and form it with the upper port of the outer ring. The ultrasonic welding mechanism is located at the welding station. The ultrasonic welding mechanism includes multiple ultrasonic welding heads distributed circumferentially. The ultrasonic welding heads are used to perform ultrasonic welding on the feed inlet of the FIBC / TUN bag after it has been flanged.

2. The ultrasonic welding equipment for the dual-station clamping and flanging of the feed inlet of the FIBC / TUN bag according to claim 1, characterized in that, When the first automatic bag-supporting, pressing, and flanging device performs ultrasonic welding at the welding station, the second automatic bag-supporting, pressing, and flanging device is located at the second feeding station to perform feeding, supporting, pressing, and flanging. When the second automatic bag-supporting, pressing, and flanging device performs ultrasonic welding at the welding station, the first automatic bag-supporting, pressing, and flanging device is located at the first feeding station to feed, support, press, and flang.

3. The ultrasonic welding equipment for the dual-station clamping and flanging of the feed inlet of the FIBC / TUN bag according to claim 1, characterized in that, Both the first automatic bag-supporting, pressing, and flanging device and the second automatic bag-supporting, pressing, and flanging device include a base and a positioning ring. The positioning ring and the outer ring are coaxially arranged. The tension layer, the pressing layer, and the flanging layer are arranged around the positioning ring. The positioning ring is detachably connected to the base so as to adapt to the feed inlets of different diameter FIBCs / ton bags by replacing positioning rings of different specifications. The base is connected to the movable bearing part on the slide rail mechanism.

4. The ultrasonic welding equipment for the dual-station clamping and flanging of the feed inlet of the FIBC / TUN bag according to claim 3, characterized in that, The inner wall of the outer ring forms a radial positioning reference surface for the container bag / ton bag body, and the upper port of the outer ring forms a flange forming support part when the feed inlet edge is folded outward; the pressing block of the pressing layer extends radially and presses the bag body near the feed inlet against the inner wall of the outer ring.

5. The ultrasonic welding equipment for the dual-station clamping and flanging of the feed inlet of a container bag / ton bag according to claim 1, characterized in that, The tension layer, the compression layer, and the flange layer each have twelve execution pressure blocks evenly distributed along the circumference. The execution pressure blocks of the three layers are arranged one-to-one with the corresponding automatic bag-supporting, pressing, and flange-flipping devices.

6. The ultrasonic welding equipment for the dual-station clamping and flanging of the feed inlet of the FIBC / TUN bag according to claim 1, characterized in that, Both the first automatic bag-supporting, pressing, and flanging device and the second automatic bag-supporting, pressing, and flanging device include a rotary cylinder and a transmission mechanism. The rotary cylinder drives the tensioning layer, the pressing layer, and the flanging layer's execution blocks to extend or retract radially through the transmission mechanism. The transmission mechanism includes at least one of a linkage mechanism, a cam disc, and / or a grooved disc.

7. The ultrasonic welding equipment for the dual-station clamping and flanging of the feed inlet of a container bag / ton bag according to claim 1, characterized in that, Both the first automatic bag-supporting, pressing, and flanging device and the second automatic bag-supporting, pressing, and flanging device include a radial guide shaft, a linear bearing, and a flanging block as an execution pressing block. The radial guide shaft extends radially and is arranged perpendicular to the central axis of the corresponding automatic bag-supporting, pressing, and flanging device. The flanging block is mounted on the radial guide shaft via the linear bearing and extends or retracts radially along the radial guide shaft. The extension stroke of the flanging block is adjustable to adjust the flanging width of the inlet of the container bag / ton bag.

8. The ultrasonic welding equipment for the dual-station clamping and flanging of the feed inlet of a container bag / ton bag according to claim 1, characterized in that, The slide rail mechanism includes a linear guide rail module and a servo drive. The servo drive is used to drive the first automatic bag-supporting, pressing, and flanging device and the second automatic bag-supporting, pressing, and flanging device to move along the linear guide rail module, and to position the first automatic bag-supporting, pressing, and flanging device at the first feeding station or the welding station, and to position the second automatic bag-supporting, pressing, and flanging device at the second feeding station or the welding station.

9. The ultrasonic welding equipment for the dual-station clamping and flanging of the feed inlet of a container bag / ton bag according to claim 1, characterized in that, The ultrasonic welding mechanism further includes a welding station frame and multiple ultrasonic welding head mounting seats. The multiple ultrasonic welding head mounting seats are distributed circumferentially on the welding station frame and are arranged one-to-one with the multiple ultrasonic welding heads. Each ultrasonic welding head mounting seat includes a mounting bracket and a lifting cylinder. The ultrasonic welding head is installed at the output end of the lifting cylinder. The lifting cylinder is used to drive the ultrasonic welding head to move up and down to adjust the welding pressure and / or welding stroke of the ultrasonic welding head on the inlet of the flanged FIBC / TBC. A preset number of ultrasonic welding heads are evenly distributed circumferentially.

10. The ultrasonic welding equipment for the dual-station clamping and flanging of the feed inlet of a container bag / ton bag according to claim 9, characterized in that, The circumferential distribution of the ultrasonic welding heads corresponds to the circumferential welding position of the inlet of the FIBC / ton bag after it is flanged. When the first automatic bag-supporting and pressing flange-flipping device or the second automatic bag-supporting and pressing flange-flipping device moves to the welding station, the welding ends of the multiple ultrasonic welding heads are respectively aligned with the corresponding circumferential positions of the inlet of the FIBC / ton bag after it is flanged, so as to perform circumferential multi-point synchronous welding on the inlet of the FIBC / ton bag.

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