Multi-mode wet toilet paper slitting and folding machine

Abstract

The application belongs to the technical field of wet toilet paper production equipment, and discloses a multi-mode wet toilet paper slitting and folding machine, which comprises two protective covers, frame assemblies are arranged in the two protective covers, liquid spraying devices are arranged at the upper ends of the frame assemblies, two groups of symmetrical and interval arranged cutter assemblies are arranged below the liquid spraying devices on the frame assemblies, two groups of parallel arranged spiral cutter assemblies are arranged below the cutter assemblies on the frame assemblies, front folding roller groups and rear folding roller groups are rotatably installed at positions corresponding to the two groups of spiral cutter assemblies on the frame assemblies, the front folding roller groups and the rear folding roller groups rotate towards each other, fork devices are arranged below the front folding roller groups and the rear folding roller groups on the frame assemblies, horizontal conveying groups are arranged below the fork devices on the frame assemblies, and longitudinal conveying groups are arranged at the output ends of the horizontal conveying groups. The application has a simple overall structure, can quickly switch different folding forms, and realizes reasonable timing of slitting and folding.

Description

Technical Field

[0001] This invention belongs to the technical field of wet toilet paper production equipment, specifically, it relates to a multi-mode wet toilet paper slitting and folding machine. Background Technology

[0002] As a disposable hygiene product, wet toilet paper has been widely used in households, medical and nursing scenarios. Its production process mainly includes roll conveying, slitting, folding, stacking and packaging. Slitting and folding are the core links that determine the forming quality, production efficiency and packaging adaptability of wet toilet paper.

[0003] Existing wet toilet paper folding equipment generally suffers from the following technical defects: First, the existing folding modes of wet toilet paper folding equipment are simple and lack versatility. Traditional equipment can only achieve fixed folding methods, such as a single bi-fold (two-fold, V-fold) or a single Z-fold, and cannot quickly switch between different folding forms on the same machine. When the production line needs to produce products of different specifications such as two-fold and three-fold, the folding equipment must be replaced and the machine must be shut down for debugging. This results in long changeover times, low equipment utilization, and difficulty in adapting to the flexible production needs of multiple varieties and small batches.

[0004] Secondly, an unreasonable sequence of slitting and folding can easily lead to defective products. Most equipment adopts a layout of folding before slitting or slitting mechanism lagging behind folding mechanism. When wet substrate is cut in an unshaped state, it is easy to cause problems such as skewed cuts, dimensional deviations, edge fuzzing, and paper stretching and deformation. At the same time, asynchronous slitting and folding can easily cause misalignment of layers and uneven stacking, affecting the subsequent packaging qualification rate. Folding before slitting has a great impact on the uniformity and penetration of liquid addition, which can easily cause uneven liquid addition and defective products such as wet outside and dry inside.

[0005] In summary, existing wet toilet paper slitting and folding equipment suffers from a single folding mode, unreasonable slitting sequence, and poor liquid addition uniformity, making it difficult to meet the production demands of modern wet toilet paper production lines for high efficiency, multiple specifications, and rapid changeover. Therefore, developing a multi-mode wet toilet paper slitting and folding machine with switchable folding modes and a reasonable slitting and folding sequence is of significant practical importance.

[0006] A Chinese patent application with application number CN2023228477961 discloses a folding machine for processing wet toilet paper. The folding machine includes a frame with a conveyor belt, a fixed plate with a disinfection nozzle, and a support bracket on the frame. A support plate is slidably mounted vertically on the support bracket. Connecting plates are located at both ends of the support plate. One connecting plate has a brush, and the other has a cleaning sponge. Sliding the support plate allows the brush and cleaning sponge to move closer to or further away from the conveyor belt, causing the support plate to move the connecting plates. This causes the brush and cleaning sponge on the connecting plates to come into contact with the bottom surface of the conveyor belt, allowing the brush to clean the surface first, followed by a secondary cleaning with the cleaning sponge. This simple structure prevents external dust or bacteria from contaminating the wet wipes.

[0007] However, the solution in this patent can only achieve a single folding method and cannot achieve rapid switching between different folding forms on the same device.

[0008] Chinese patent application CN202420092231.9 discloses a novel wet toilet paper folding and separating machine belonging to the field of wet toilet paper processing technology. The machine includes a frame, with a paper stacking assembly mounted on the upper end of the frame. The paper stacking assembly includes two paper stacking rollers, each with several rows of cutting blades arranged in a circular array around its circumference. Each row of cutting blades includes several equally spaced rotating blades. A blade shaft is located above one of the paper stacking rollers, with a fixed blade mounted at the bottom of the blade shaft. A guide roller is located on the side of the fixed blade. A paper receiving assembly is located below the paper stacking assembly. A first tearing component is located on one side of the upper end of the paper receiving assembly, and a second tearing component is located on the other side of the upper end of the paper receiving assembly. A first pushing component is located on the side of the paper receiving assembly. This invention tears folded wet toilet paper into a set number of sheets, allowing for single or multiple sheet extraction during use, thus making the use of wet toilet paper more convenient.

[0009] However, the poor coordination between the paper-splitting and folding mechanisms in this patent limits the versatility of the device. Summary of the Invention

[0010] The main technical problem to be solved by this invention is to provide a multi-mode wet toilet paper slitting and folding machine with a simple overall structure, capable of quickly switching between different folding modes and achieving a reasonable sequence of slitting and folding. This effectively solves the problems of existing equipment, such as single folding mode, cumbersome model changeover, unreasonable slitting and folding sequence leading to high defect rate, low equipment utilization, high maintenance cost, and poor liquid addition quality. This improves the forming quality, production efficiency, and equipment versatility of wet toilet paper, thereby enhancing its performance.

[0011] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0012] A multi-mode wet toilet paper slitting and folding machine includes two symmetrically spaced protective covers. A frame assembly is installed inside each protective cover. A spraying device is installed at the top of the frame assembly. Two sets of symmetrically spaced cutting blades are installed on the frame assembly below the spraying device, capable of longitudinally slitting the raw paper. Two sets of parallel spiral blades are installed on the frame assembly below the cutting blades, capable of transversely cutting the longitudinally slitting paper strip. A front folding roller group and a rear folding roller group are rotatably mounted on the frame assembly at positions corresponding to the two sets of spiral blades, rotating towards each other. A shift fork device is installed on the frame assembly below the front and rear folding roller groups. A transverse conveyor group is installed on the frame assembly below the shift fork device. A longitudinal conveyor group is installed at the output end of the transverse conveyor group.

[0013] The front folding roller assembly includes a front folding roller shaft rotatably mounted on the frame assembly. The outer surface of the front folding roller shaft has multiple sets of first suction holes arranged in a linear array, which can be used to adsorb and fix the paper tape through negative pressure. The outer surface of the front folding roller shaft also has three first moving blades arranged in a ring array, and a paper folding blade is fixedly installed at the adjacent position of each first moving blade. The first moving blades can realize the Z-shaped folding and cutting of the paper tape.

[0014] The rear folding roller assembly includes a rear folding roller shaft rotatably mounted on the frame assembly. The outer surface of the rear folding roller shaft has multiple sets of second suction holes arranged in a linear array for negative pressure adsorption and positioning of the paper tape. The outer surface of the rear folding roller shaft is provided with three second moving blades arranged in a ring array, which can precisely cooperate with the folding blades of the front folding roller assembly to realize the folding action of the wet toilet paper, and simultaneously complete the folding and cutting of the cutting line.

[0015] The following are further optimizations of the above technical solution by the present invention:

[0016] The frame assembly includes two mounting wall panels arranged symmetrically at intervals.

[0017] The cutter assembly includes a stainless steel air pipe fixedly installed between two mounting wall panels. A knife holder is fixedly installed on the upper surface of the stainless steel air pipe, and multiple pneumatic cutters are adjustablely installed on the mounting surface of the knife holder.

[0018] Two sets of symmetrically arranged paper-feeding roller assemblies are also rotatably installed between the two mounting wall panels, and each set of paper-feeding roller assemblies is matched with a corresponding cutting blade assembly;

[0019] The paper feeder roller assembly includes a roller body rotatably mounted between two mounting wall plates. Multiple slots corresponding to pneumatic cutters are opened on the surface of the roller body. The blades of the pneumatic cutters extend into the slots to longitudinally cut the raw paper into paper strips.

[0020] Further optimization: The spiral blade assembly includes a spiral blade shaft rotatably mounted between two mounting wall plates. One end of the spiral blade shaft passes through one side of the mounting wall plate and is fixedly connected to a blade cutting drive device, which drives the spiral blade shaft to rotate.

[0021] A blade plate is fixedly mounted on the outer surface of the spiral cutter shaft by bolts. The blade plate is inclined at a spiral angle relative to the axis of the spiral cutter shaft. Multiple evenly spaced pressure plates are detachably mounted on the outer surface of the blade plate by bolts. Cutting blades are clamped and fixed between the pressure plates and the blade plates.

[0022] Further optimization: The two sets of spiral knife assemblies are independently controlled and work independently, which can realize multi-mode switching cutting: When producing Z-shaped folded wet toilet paper, the direction of the raw paper is changed so that the raw paper is wrapped around the surface of the front folding roller group and the spiral knife assembly that cooperates with the front folding roller group works.

[0023] When producing bi-fold wet toilet paper, the paper feed path is adjusted so that the paper is wrapped around the surface of the rear folding roller assembly and operates in conjunction with the spiral knife assembly of the rear folding roller assembly.

[0024] Further optimization: The fork device includes a first fork group set on two mounting wall plates. The first fork group is located near the lower part of the front folding roller shaft and acts on the front folding roller shaft to peel the wet toilet paper that has been cut from the front folding roller shaft.

[0025] Multiple first annular grooves are opened on the front folding roller shaft at the positions corresponding to the first shift fork group, so that the first shift fork group can extend into them and realize the peeling action;

[0026] Both ends of the front folding roller shaft are fixedly installed with front gear sets after passing through the corresponding mounting wall panels.

[0027] Further optimization: A second shift fork group is also provided between the two mounting wall panels. The second shift fork group is located near the lower part of the rear folding roller shaft and acts on the rear folding roller shaft.

[0028] Multiple second annular grooves are opened on the rear folding roller shaft at the corresponding positions of the second shift fork group, so that the second shift fork group can extend into them and realize the peeling action;

[0029] Both ends of the rear folding roller shaft are fixedly installed with rear gear sets after passing through the corresponding mounting wall panels.

[0030] Further optimization: A receiving group and an insertion group are slidably installed below the first and second fork groups. The receiving group receives the wet toilet paper peeled off by the first and second fork groups. When the number of wet toilet paper reaches a preset value, the insertion group is inserted to tear off the wet toilet paper and convey it downwards.

[0031] Further optimization: A lifting receiving group is slidably installed between the two mounting wall panels below the receiving group. The wet toilet paper sandwiched between the receiving group and the insertion group is received by the lifting receiving group and then conveyed to the horizontal conveying group.

[0032] Further optimization: The first shift fork assembly includes a first rotating shaft rotatably mounted on two mounting wall plates. One end of the first rotating shaft passes through the corresponding mounting wall plate and is fixedly connected to a first shift fork transmission assembly. The other end of the first shift fork transmission assembly is hinged to a first shift fork gear assembly, which meshes with the front gear assembly.

[0033] Multiple first forks are arranged in a linear array on the side of the first rotating shaft facing the front folding roller shaft. The first forks can extend into the first annular groove on the surface of the front folding roller shaft to peel off the cut and folded wet toilet paper.

[0034] Further optimization: The second shift fork assembly includes a second rotating shaft rotatably mounted between two mounting wall plates. One end of the second rotating shaft passes through the corresponding mounting wall plate and is fixedly connected to a second shift fork transmission assembly. The other end of the second shift fork transmission assembly is hinged to a second shift fork gear assembly, which meshes with the rear gear assembly.

[0035] Multiple second forks are arranged in a linear array on the side of the second rotating shaft facing the rear folding roller shaft. The second forks can extend into the second annular groove on the surface of the rear folding roller shaft to peel off the cut and folded wet toilet paper.

[0036] The present invention, by adopting the above technical solution, has the following beneficial effects:

[0037] This invention features an ingenious overall structural design and a rational layout. It specifically optimizes existing wet toilet paper cutting and folding equipment, addressing its shortcomings such as limited folding modes, cumbersome changeovers, unreasonable cutting and folding sequences, high defect rates, low equipment utilization, and poor liquid dispensing effects. This achieves integrated automated operation of wet toilet paper cutting, folding, transfer, and conveying. While improving production efficiency and forming quality, it significantly enhances the equipment's versatility and flexible production capabilities, and reduces production and maintenance costs. Specific beneficial effects are as follows:

[0038] First, this invention features two independently driven and controlled spiral knife assemblies, respectively adapted to the front folding roller group and the rear folding roller group. When producing Z-shaped folded wet toilet paper, only the direction of the raw paper is changed, allowing it to pass through the spiral knife assembly that cooperates with the front folding roller group. When producing bi-folded wet toilet paper, the mechanism remains unchanged; only the direction of the raw paper is changed, allowing it to pass through the spiral knife assembly that cooperates with the rear folding roller group. The mode switching process requires no replacement of the cutters or adjustment of the mechanical structure; it only changes the path of the raw paper material through the drive rollers, effectively shortening the changeover time. This allows a single machine to be compatible with two core folding specifications, adapting to the flexible production needs of multiple varieties and small batches, significantly improving equipment utilization and reducing equipment investment costs.

[0039] Secondly, this invention employs a sequence of operations that involves slitting before folding, with cutting and folding occurring simultaneously. Longitudinal slitting is precisely completed by the pneumatic cutter and the paper guide roller assembly, while transverse cutting is achieved by the precise docking of the spiral blade assembly and the moving blade of the folding roller assembly. Furthermore, the cutting process simultaneously completes the formation of creases and cutting lines. At the same time, air suction holes are provided on both the front and rear folding roller shafts, and the paper strip is precisely positioned through negative pressure adsorption. This avoids problems such as skewed cuts, dimensional deviations, and edge fuzzing caused by cutting wet substrate in an unformed state. It also effectively solves the defects of misaligned stacking and uneven stacking, ensuring that wet toilet paper is folded neatly and uniformly, and significantly reducing the defect rate.

[0040] Furthermore, the front and rear folding roller groups of this invention achieve synchronous opposite rotation through gear meshing, and the shift fork group achieves precise synchronization of peeling and folding actions through gear linkage with the folding roller group. The receiving group, insertion group, and lifting receiving group are driven synchronously up and down by a lifting drive device, and the claw structures of each component are arranged one-to-one to achieve seamless connection of wet toilet paper from peeling, quantitative receiving, clamping to transfer. At the same time, a paper spreading roller assembly is set to spread, flatten, and guide the paper strip, eliminating paper strip wrinkles and deviations, further ensuring the action accuracy of each process. All mechanisms of the whole machine work together in an orderly manner, run smoothly without jamming, realize fully automated operation, significantly reduce manual intervention, and improve production efficiency.

[0041] The pneumatic cutter of this invention adopts a dovetail-shaped structure and can be adjusted and mounted on the blade holder. The spacing can be flexibly adjusted according to production needs to meet the slitting requirements of paper tapes of different widths. The cutter blade of the spiral blade assembly is clamped and fixed by the pressure plate and the blade plate, realizing quick disassembly and replacement of the blade and reducing maintenance difficulty. All sliding parts adopt a guide structure with slider and slide rail cooperation, so the lifting action is smooth and precise without jamming or deviation. At the same time, a protective cover is set to limit the working area, and the liquid spraying device is equipped with a return stainless steel tray to realize liquid recycling, which not only improves the safety of equipment operation, but also saves production resources.

[0042] The present invention will be further described below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0043] Figure 1 This is a schematic diagram of the overall structure in an embodiment of the present invention;

[0044] Figure 2 This is a partial structural diagram of the overall structure in an embodiment of the present invention;

[0045] Figure 3 This is a side view of the overall structure in an embodiment of the present invention;

[0046] Figure 4 This is a schematic diagram of the internal structure of the overall structure in an embodiment of the present invention;

[0047] Figure 5 This is a schematic diagram of the structure of the frame component in an embodiment of the present invention;

[0048] Figure 6 This is a schematic diagram of the liquid spraying device in an embodiment of the present invention;

[0049] Figure 7 This is a schematic diagram of the structure of the front folding roller group in an embodiment of the present invention;

[0050] Figure 8 This is a side view of the front folding roller assembly in an embodiment of the present invention;

[0051] Figure 9 This is a schematic diagram of the structure of the rear folding roller group in an embodiment of the present invention;

[0052] Figure 10 This is a side view of the rear folding roller assembly in an embodiment of the present invention;

[0053] Figure 11 This is a schematic diagram of the spiral blade assembly in an embodiment of the present invention;

[0054] Figure 12 This is a schematic diagram of the shift fork device in an embodiment of the present invention;

[0055] Figure 13 This is a side view of the shift fork device in an embodiment of the present invention;

[0056] Figure 14 This is a top view of the shift fork device in an embodiment of the present invention.

[0057] In the diagram: 1. Protective cover; 2. Frame assembly; 21. Mounting wall panel; 22. Cutter assembly; 220. Knife hanger; 221. Pneumatic cutter; 222. First paper-feeding roller assembly; 223. Stainless steel air pipe; 23. Spraying device; 230. Humidifying baffle; 231. Paper-feeding rubber roller; 232. Paper-feeding steel roller; 233. Infusion pipe; 234. Fan-shaped nozzle; 235. Stainless steel return tray; 24. Paper-feeding knife roller assembly; 3. Spiral knife assembly; 31. Spiral knife shaft; 32. 33. Blade plate; 34. Blade cutting drive device; 341. Blade cutting drive cylinder; 342. Rocker arm; 4. Front folding roller assembly; 41. Front folding roller shaft; 42. First air suction hole; 43. First moving blade; 44. Folding blade; 45. Front gear assembly; 5. Rear folding roller assembly; 51. Rear folding roller shaft; 52. Second air suction hole; 53. Second moving blade; 54. Rear gear assembly; 6. Fork device; 61. First fork assembly; 610. First rotating shaft; 611. First... 612. First shift fork gear assembly; 613. First shift fork transmission assembly; 62. Second shift fork assembly; 620. Second rotating shaft; 621. Second shift fork gear assembly; 622. Second shift fork; 623. Second shift fork transmission assembly; 63. Receiving assembly; 630. First mounting aluminum profile; 631. First motor; 632. First rotating shaft; 633. First insertion arm; 634. Second mounting aluminum profile; 635. Receiving and stacking claw; 64. Insertion assembly; 640. Third mounting arm. 641. Second motor; 642. Second rotating shaft; 643. Second insertion arm; 644. Fourth aluminum profile mounting arm; 645. Insertion and stacking claw; 65. Lifting and receiving assembly; 650. Lifting aluminum profile; 651. Lifting and receiving claw; 66. Lifting drive device; 660. Lifting control motor; 661. Lifting belt; 662. Locking plate assembly; 7. Lateral conveying assembly; 71. Lateral conveyor belt; 72. Pushing device; 721. Pushing rod; 8. Longitudinal conveying assembly. Detailed Implementation

[0058] like Figure 1-14As shown: A multi-mode wet toilet paper slitting and folding machine includes two symmetrically spaced protective covers 1. A frame assembly 2 is installed inside each protective cover 1. A spraying device 23 is installed at the upper end of the frame assembly 2. Two sets of symmetrically spaced cutting blade assemblies 22 are installed on the frame assembly 2 below the spraying device 23, capable of longitudinally slitting the raw paper. Two sets of parallel spiral blade assemblies 3 are installed on the frame assembly 2 below the cutting blade assemblies 22, capable of transversely cutting the longitudinally slitting paper strip. A front folding roller group 4 and a rear folding roller group 5 are rotatably mounted on the frame assembly 2 at positions corresponding to the two sets of spiral blade assemblies 3, rotating towards each other. A shifting fork device 6 is installed on the frame assembly 2 below the front folding roller group 4 and the rear folding roller group 5. A transverse conveying group 7 is installed on the frame assembly 2 below the shifting fork device 6. A longitudinal conveying group 8 is installed at the output end of the transverse conveying group 7.

[0059] The front folding roller group 4 includes a front folding roller shaft 41 rotatably mounted on the frame assembly 2. The outer surface of the front folding roller shaft 41 has multiple sets of first air suction holes 42 arranged in a linear array, which can be used to adsorb and fix the paper tape by negative pressure. The outer surface of the front folding roller shaft 41 is also provided with three first moving blades 43 arranged in a ring array, and a paper folding blade 44 is fixedly installed at the adjacent position of each first moving blade 43. The paper tape can be folded into a Z-shape and cut into the cutting line by the first moving blades 43.

[0060] The rear folding roller group 5 includes a rear folding roller shaft 51 rotatably mounted on the frame assembly 2. The outer surface of the rear folding roller shaft 51 has multiple sets of second air suction holes 52 arranged in a linear array for negative pressure adsorption and positioning of the paper tape. The outer surface of the rear folding roller shaft 51 is provided with three second moving blades 53 arranged in a ring array, which can precisely cooperate with the folding blades 44 of the front folding roller group 4 to realize the folding action of the wet toilet paper and simultaneously complete the folding and cutting of the blade line.

[0061] like Figure 5-6 As shown, the frame component 2 includes two mounting wall panels 21 arranged symmetrically at intervals.

[0062] The two mounting wall panels 21 are respectively embedded inside the two protective covers 1, serving as the core load-bearing base of the whole machine. They not only provide stable installation support for the protective covers 1, but also provide coaxiality installation reference for the cutter assembly 22, spiral cutter assembly 3, front folding roller group 4 and rear folding roller group 5 through a symmetrical structure, effectively ensuring the operating accuracy and coordinated stability of each transmission mechanism.

[0063] The spraying device 23 includes two humidifying baffles 230 that are fixedly installed on the upper end of the mounting wall plate 21, which are used to define the humidification area and prevent liquid splashing.

[0064] A set of paper-feeding rubber rollers 231 and a set of paper-feeding steel rollers 232 are provided between the two humidifying baffles 230 near the edges on both sides. The paper-feeding rubber rollers 231 and paper-feeding steel rollers 232 on the same side are in a close fit. When the raw paper passes between the two, it is reliably clamped, ensuring that the conveying process is flat and wrinkle-free.

[0065] The two sets of paper-feeding steel rollers 232 are rotatably installed between the two mounting wall plates 21, while the two sets of paper-feeding rubber rollers 231 are movably installed on the mounting wall plates 21 via bearing seats.

[0066] In this embodiment, both sides of the two mounting wall panels 21 are hinged with extension cylinders near the paper feed roller 231, and the ends of the paper feed roller 231 with bearing seats are respectively hinged to the power end of the extension cylinder.

[0067] When the cylinder extends, it drives the paper-feeding rubber roller 231 to fit tightly against the paper-feeding steel roller 232 to clamp the paper; when the cylinder retracts, it drives the paper-feeding rubber roller 231 away from the paper-feeding steel roller 232, which facilitates the initial paper feeding operation of the equipment.

[0068] Multiple infusion tubes 233 are installed between the two mounting wall panels 21 and between the two sets of paper-feeding rubber rollers 231 and paper-feeding steel rollers 232.

[0069] The outer surface of the infusion tube 233 has multiple fan-shaped nozzles 234 arranged linearly, with the outlets of the multiple fan-shaped nozzles 234 facing downwards.

[0070] Multiple infusion tubes 233 are connected to an external liquid storage device, which can evenly spray the functional liquid required for wet toilet paper onto the surface of the paper.

[0071] A return stainless steel tray 235 is fixedly installed between the two mounting wall panels 21 at a position below multiple infusion tubes 233.

[0072] The stainless steel return pan 235 has a liquid outlet on one side, which is connected to the liquid storage device through a pipeline. It can recover excess liquid and realize recycling, thereby improving resource utilization.

[0073] The principle of the liquid storage device and the control of the fan-shaped nozzle 234 to spray liquid is well known in the prior art and will not be described in detail here.

[0074] During operation, the raw paper passes between the paper-feeding rubber roller 231 and the paper-feeding steel roller 232 on one side, and after being humidified under multiple liquid infusion pipes 233, it is output between the paper-feeding rubber roller 231 and the paper-feeding steel roller 232 on the other side, achieving continuous and stable humidification and conveying.

[0075] The cutter assembly 22 includes a stainless steel air pipe 223 fixedly installed between two mounting wall panels 21. The stainless steel air pipe 223 is located adjacent to the paper feeding roller 231 and is connected to an external air source through a pipeline.

[0076] A knife holder 220 is fixedly installed on the upper surface of the stainless steel air pipe 223. The upper surface of the knife holder 220 is provided with a dovetail-shaped mounting surface. Multiple pneumatic cutters 221 are adjustablely installed on the mounting surface of the knife holder 220.

[0077] The air inlets of multiple pneumatic cutters 221 are all connected to stainless steel air pipes 223, and are supplied with air from an external air source.

[0078] In this embodiment, the pneumatic cutter 221 is a commercially available pneumatic shearing blade. Its core principle is based on pneumatic shearing, pneumatic pressure cutting, and servo independent drive. It is suitable for continuous cutting of flexible materials such as wet toilet paper, non-woven fabric, and film. The specific installation method is well known in the prior art and will not be described in detail here.

[0079] The bottom of the pneumatic cutter 221 is provided with a dovetail groove that matches the dovetail mounting surface of the blade holder 220. After each pneumatic cutter 221 is installed in place, it is tightened and positioned by bolts. The spacing between adjacent pneumatic cutters 221 can be flexibly adjusted according to the cutting width requirements to meet the cutting requirements of paper tapes of different specifications and expand the applicability of the equipment.

[0080] Two sets of symmetrically arranged paper guide roller assemblies 24 are also rotatably installed between the two mounting wall panels 21, and each set of paper guide roller assemblies 24 is matched with a corresponding cutter assembly 22.

[0081] The paper feed roller assembly 24 includes a roller body rotatably mounted between two mounting wall plates 21. Multiple grooves corresponding to the pneumatic cutter 221 are opened on the surface of the roller body. The blade of the pneumatic cutter 221 extends into the groove to longitudinally cut the raw paper into paper strips.

[0082] In this embodiment, the two sets of paper-feeding knife roller assemblies 24 are driven to rotate by a motor reducer. The specific installation method and principle are known in the prior art and will not be described in detail here.

[0083] The raw paper output from between the paper guide roller 231 and the paper guide steel roller 232 on one side is wound around the paper guide knife roller assembly 24 to complete longitudinal slitting and form multiple paper strips.

[0084] Two sets of first paper roll assemblies 222 are rotatably installed between the two mounting wall panels 21.

[0085] The two sets of the first paper-folding roller assemblies 222 are located on both sides of the front folding roller assembly 4 and the rear folding roller assembly 5, respectively.

[0086] After being slit, the paper strip passes through the first unslitting roller assembly 222 and enters between the front folding roller group 4 and the rear folding roller group 5 for folding and further slitting.

[0087] The first paper roll assembly 222 is used to stretch, flatten and guide the longitudinally slit paper strip, eliminate paper strip wrinkles and deviations, and ensure the accuracy of subsequent cutting and folding.

[0088] The first paper feeding roller assembly 222 includes a paper feeding roller body, which is rotatably mounted on the mounting wall plate 21 through bearings at both ends. The roller body can rotate freely and has a smooth outer surface. It cooperates with the paper belt to achieve smooth paper feeding. Its specific structure is known in the prior art and will not be described in detail here.

[0089] A supporting square tube is also fixedly connected to the bottom end between the two mounting wall panels 21 to further strengthen the frame component 2.

[0090] The two sets of spiral blade assemblies 3 work in conjunction with the front folding roller group 4 and the rear folding roller group 5, respectively. The spiral blade assembly 3 is arranged at an inclined angle relative to the front folding roller group 4 and the rear folding roller group 5. This arrangement can achieve precise synchronization of oblique cutting and continuous folding of the paper tape, effectively avoid cutting interference and paper tape jamming, and improve the folding forming accuracy and the overall machine operation stability.

[0091] This type of angle matching method is already well known in the existing technology, and will not be elaborated here.

[0092] like Figure 4 , Figure 11 As shown, the spiral cutter assembly 3 includes a spiral cutter shaft 31 that is rotatably mounted between two mounting wall plates 21.

[0093] The spiral cutter shaft 31 is rotatably mounted on two mounting wall plates 21 via bearings at both ends. One end of the spiral cutter shaft 31 passes through one side of the mounting wall plate 21 and is fixedly connected to a cutting drive device 34, which drives the shaft to rotate.

[0094] The outer surface of the spiral cutter shaft 31 is fixedly mounted with a cutter plate 32 by bolts. The cutter plate 32 is arranged at a spiral angle relative to the axis of the spiral cutter shaft 31.

[0095] Multiple evenly spaced pressure plates 33 are detachably mounted on the outer surface of the blade plate 32 via bolts.

[0096] A cutting blade (not shown in the figure) is clamped and fixed between the pressure plate 33 and the blade plate 32, thereby achieving reliable positioning and quick assembly / disassembly of the cutting blade.

[0097] In this embodiment, the cutting blade has multiple sets of evenly spaced breakpoint structures on its edge, which can form pre-tear lines during the paper tape cutting process, facilitating subsequent segmentation and use of the finished product. This structure and its working principle are existing technologies and will not be described in detail here.

[0098] The cutting drive device 34 includes a rocker arm 342 that is fixedly connected to one end of the spiral cutter shaft 31.

[0099] The other end of the rocker arm 342 is hinged to a cutting drive cylinder 341, and the power output shaft end of the cutting drive cylinder 341 is hinged to the rocker arm 342.

[0100] The mounting end of the cutting drive cylinder 341 is hinged to the mounting wall plate 21.

[0101] The rocker arm 342 and the power output shaft of the cutting drive cylinder 341 are arranged at a preset angle. This structural design ensures that when the spiral blade assembly 3 is working, after the cutting drive cylinder 341 is started, its power output shaft retracts, driving the rocker arm 342 to rotate downward around the axis of the spiral blade shaft 31, thereby driving the spiral blade shaft 31 to rotate synchronously, so that the cutting blade and the first moving blade 43 and the second moving blade 53 on the corresponding side can cooperate precisely to achieve transverse cutting of the paper tape, ensuring that the cutting action is stable, accurate and efficient.

[0102] The method by which the cutting blades cooperate with the first moving blade 43 and the second moving blade 53 to perform transverse cutting of the paper tape is well known in the prior art and will not be described in detail here.

[0103] The two sets of spiral blade assemblies 3 are independently controlled and operate independently, enabling multi-mode switching for cutting:

[0104] When producing Z-shaped folded wet toilet paper, there is no need to adjust the mechanical structure or change the direction of the raw paper. The raw paper is wound around the surface of the front folding roller group 4 and operates with the spiral knife assembly 3 that cooperates with the front folding roller group 4.

[0105] When producing folded wet toilet paper, the paper feed path is adjusted so that the paper is wrapped around the surface of the rear folding roller group 5 and the spiral knife assembly 3 works in conjunction with the rear folding roller group 5.

[0106] This design enables a single machine to be compatible with both Z-fold and bi-fold finished product specifications. The switching process does not require changing the cutter or adjusting the mechanical structure. The mode switching can be completed simply by controlling the start and stop of the corresponding spiral cutter assembly 3, which greatly improves the versatility and production efficiency of the equipment, reduces changeover time and production costs, and at the same time ensures the cutting accuracy and folding stability under different folding forms.

[0107] The outer surface of the front folding roller 41 is provided with a first V-shaped groove near the first moving knife 43.

[0108] The outer surface of the rear folding roller 51 has two spaced second V-shaped grooves between the two second moving blades 53.

[0109] Both ends of the front folding roller shaft 41 are fixedly installed with front gear sets 45 after passing through the corresponding mounting wall plates 21. The front gear set 45 at one end of the front folding roller shaft 41 is connected to a drive motor via belt drive to provide power.

[0110] Both ends of the rear folding roller shaft 51 are fixedly installed with rear gear sets 54 after passing through the corresponding mounting wall plates 21.

[0111] The front gear set 45 connected to the drive motor meshes with a corresponding set of rear gears 54, thereby enabling the front folding roller shaft 41 and the rear folding roller shaft 51 to rotate synchronously, in opposite directions, and in reverse, ensuring that the paper tape is stably fed downwards and completes the folding action.

[0112] The rear gear set 54, which meshes with the front gear set 45, is simultaneously connected to a counting cylinder set to count the number of folded sheets of wet toilet paper. The specific principle is well known in the existing technology and will not be elaborated here.

[0113] Two sets of second paper roll assemblies are rotatably installed between the two mounting wall panels 21, near the positions of the front folding roller group 4 and the rear folding roller group 5.

[0114] During the Z-shaped folding, the slit paper strip passes through the second unscrewing roller assembly near the front folding roller group 4 and is then wrapped around the upper surface of the front folding roller shaft 41 before being output between the front folding roller shaft 41 and the rear folding roller shaft 51.

[0115] During folding, the slit paper strip passes through the second unscrewing roller assembly near the rear folding roller group 5 and is then wrapped around the upper surface of the rear folding roller shaft 51 before being output between the front folding roller shaft 41 and the rear folding roller shaft 51.

[0116] During the Z-shaped folding process, the front folding roller 41 rotates, and the first suction hole 42 generates negative pressure to adsorb and position the paper strip. The first moving knife 43 cooperates with the cutting blade of the spiral knife assembly 3 to complete the transverse cutting of the paper strip. When the cutting blade acts in the first V-shaped groove, it completes the fold. This forms a Z-shaped folding pattern with the cutting line in the middle of a wet toilet paper and the fold lines on both sides.

[0117] During this period, the rear folding roller 51 rotates idling, playing an auxiliary role in preventing the paper tape from deviating or wrinkling, and providing a stable paper tape conveying environment for the front folding roller group 4 to complete the Z-shaped folding, ensuring that the folding is neat and orderly.

[0118] During the process of folding wet toilet paper, the front folding roller 41 and the rear folding roller 51 rotate. The second suction hole 52 adsorbs and positions the paper strip through negative pressure. The second moving knife 53 cooperates with the cutting blade in the corresponding side spiral knife assembly 3 to complete the transverse cutting of the paper strip. During the rotation of the front folding roller 41, the folding knife 44 bends the middle of the paper strip and folds it into the corresponding second V-shaped groove, so that the paper strip forms a single-layer folded shape along the length direction, thereby realizing the folding and forming of the folded wet toilet paper. The other second V-shaped groove is for the first moving knife 43 to avoid.

[0119] During this period, the front folding roller 41 rotates idling, which also plays an auxiliary role.

[0120] like Figure 12-14 As shown, the fork device 6 includes a first fork group 61 disposed on two mounting wall plates 21. The first fork group 61 is located near the lower part of the front folding roller shaft 41 and acts on the front folding roller shaft 41 to peel the slit wet toilet paper from the front folding roller shaft 41.

[0121] Multiple first annular grooves are formed on the front folding roller shaft 41 at the positions corresponding to the first shift fork group 61, so that the first shift fork group 61 can extend into them and perform the peeling action.

[0122] A second shift fork group 62 is also provided between the two mounting wall panels 21. The second shift fork group 62 is located near the lower part of the rear folding roller shaft 51 and acts on the rear folding roller shaft 51.

[0123] Multiple second annular grooves are provided on the rear folding roller shaft 51 at the positions corresponding to the second shift fork group 62, so that the second shift fork group 62 can extend into them and perform the peeling action.

[0124] Below the first fork group 61 and the second fork group 62, a receiving group 63 and an insertion group 64 are slidably installed. The receiving group 63 receives the wet toilet paper peeled off by the first fork group 61 and the second fork group 62. When the amount of wet toilet paper reaches a preset value, the insertion group 64 is inserted and tears off the wet toilet paper and conveys it downward.

[0125] A lifting receiving group 65 is slidably installed between the two mounting wall panels 21 at a position below the receiving group 63. The wet toilet paper sandwiched between the receiving group 63 and the insertion group 64 is received by the lifting receiving group 65 and then transported to the horizontal conveying group 7.

[0126] The first shift fork assembly 61 includes a first rotating shaft 610 rotatably mounted on two mounting wall plates 21.

[0127] One end of the first rotating shaft 610 passes through the corresponding mounting wall plate 21 and is fixedly connected to the first shift fork transmission assembly 613.

[0128] The other end of the first shift fork transmission assembly 613 is hinged to the first shift fork gear assembly 611.

[0129] The first shift fork gear set 611 is meshed with the front gear set 45.

[0130] The first shift fork transmission assembly 613 includes a first connecting arm sleeved on one end of the first rotating shaft 610, the other end of the first connecting arm being hinged to a second connecting arm via a bearing, and the other end of the second connecting arm being eccentrically hinged to the rotating shaft of the first shift fork gear assembly 611 via a bearing.

[0131] With this design, the transmission structure enables the first shift fork gear set 611 to rotate synchronously when the front folding roller group 4 rotates and drives the front gear group 45 to rotate, and drives the first rotating shaft 610 to reciprocate through the eccentric transmission of the first shift fork transmission group 613.

[0132] The first rotating shaft 610 has a plurality of first forks 612 arranged in a linear array on the side facing the front folding roller shaft 41. The first forks 612 can extend into the first annular groove on the surface of the front folding roller shaft 41 to peel off the cut and folded wet toilet paper.

[0133] The second shift fork assembly 62 includes a second rotating shaft 620 rotatably mounted between two mounting wall plates 21.

[0134] One end of the second rotating shaft 620 passes through the corresponding mounting wall plate 21 and is fixedly connected to the second shift fork transmission assembly 623.

[0135] The other end of the second shift fork transmission assembly 623 is hinged to a second shift fork gear assembly 621, which meshes with the rear gear assembly 54.

[0136] The second shift fork transmission assembly 623 includes a third connecting arm sleeved at the end of the second rotating shaft 620. The other end of the third connecting arm is hinged to a fourth connecting arm via a bearing. The other end of the fourth connecting arm is eccentrically hinged to the rotating shaft of the second shift fork gear assembly 621 via a bearing.

[0137] This transmission structure enables the second shift fork gear set 621 to rotate synchronously when the rear folding roller group 5 rotates and drives the rear gear group 54 to rotate, and drives the second rotating shaft 620 to reciprocate through the eccentric transmission of the second shift fork transmission group 623.

[0138] The second rotating shaft 620 has a plurality of second forks 622 arranged in a linear array on one side facing the rear folding roller shaft 51. The second forks 622 can extend into the second annular groove on the surface of the rear folding roller shaft 51 to peel off the cut and folded wet toilet paper.

[0139] The receiving assembly 63 includes a first mounting aluminum profile 630 that can be slidably mounted on two mounting wall panels 21.

[0140] The first mounting aluminum profile 630 achieves guided sliding through the cooperation of the slider and the slide rail, ensuring that its up and down sliding process is smooth, precise, and without deviation.

[0141] The first motor 631 is fixedly mounted on the side of the first mounting aluminum profile 630 near the first shift fork assembly 61.

[0142] The first motor 631 has a first rotating shaft 632 fixedly mounted on its power output shaft end. The first rotating shaft 632 is rotatably mounted on the first mounting aluminum profile 630 via a bearing seat.

[0143] Multiple evenly spaced first insertion arms 633 are fixedly installed on the outer surface of the first rotating shaft 632. The first insertion arms 633 are configured as crank arms to facilitate power transmission and angle conversion.

[0144] The other end of the multiple first insertion arms 633 is hinged to the same second mounting aluminum profile 634. The two ends of the second mounting aluminum profile 634 are slidably mounted with mounting plates. The mounting plates are fixedly connected to the first mounting aluminum profile 630, thereby driving the second mounting aluminum profile 634 to slide up and down along the two mounting wall panels 21 together with the first mounting aluminum profile 630.

[0145] The second mounting aluminum profile 634 has a linear array of multiple receiving and stacking claws 635 at the end away from the first motor 631.

[0146] With this design, when the first fork assembly 61 peels off the cut and folded wet toilet paper, the receiving assembly 63 can adjust the height of the receiving and folding claw 635 by sliding the first mounting aluminum profile 630 up and down, so that it is precisely aligned with the peeled wet toilet paper. The wet toilet paper is automatically formed and peeled off under the combined action of creases and negative pressure adsorption.

[0147] After the first motor 631 starts, it drives the first rotating shaft 632 to rotate. The first insertion arm 633 drives the second mounting aluminum profile 634 to finely adjust its angle and position, so that multiple receiving and stacking claws 635 can stably hold the wet toilet paper, realizing the orderly receiving and stacking of single sheets of wet toilet paper.

[0148] Meanwhile, the fixed cooperation between the mounting plate and the first mounting aluminum profile 630 ensures that the second mounting aluminum profile 634 slides synchronously and maintains a stable posture, preventing the wet toilet paper from falling, wrinkling, or stacking disorderly during the receiving process, thus providing a reliable guarantee for the subsequent operation of the insertion group 64 and the quantitative delivery of wet toilet paper.

[0149] The insertion group 64 is arranged correspondingly to the receiving group 63 and is synchronously slidably installed between the two mounting wall panels 21. It is located next to the receiving group 63 and works in coordination with the receiving group 63 to complete the quantitative clamping and conveying action of wet toilet paper. The overall structure is adapted to the receiving group 63 to ensure the synchronization and stability of the action.

[0150] The insertion group 64 includes a third mounting aluminum profile 640. The third mounting aluminum profile 640 is installed on the two mounting wall panels 21 in sync with the first mounting aluminum profile 630 through the cooperation of the slider and the slide rail, ensuring that the height adjustment of the insertion group 64 and the receiving group 63 are synchronized and avoiding interference.

[0151] The second motor 641 is fixedly installed on one end face of the third mounting aluminum profile 640 near the second shift fork assembly 62.

[0152] The second motor 641 has a second rotating shaft 642 fixedly connected to its power output shaft end. The second rotating shaft 642 is rotatably supported on the third mounting aluminum profile 640 by a bearing with a seat, ensuring that the second rotating shaft 642 rotates smoothly and that the power transmission is reliable.

[0153] The outer surface of the second rotating shaft 642 is fixedly equipped with a plurality of evenly spaced second insertion arms 643. The second insertion arms 643 adopt a crank arm structure that is compatible with the first insertion arm 633, so as to facilitate linkage with the action of the receiving group 63 and achieve precise angle conversion.

[0154] The other end of the multiple second insertion arms 643 is hinged to the same fourth mounting aluminum profile 644.

[0155] The fourth mounting aluminum profile 644 has a linkage plate slidably mounted at both ends. The linkage plate is fixedly connected to the third mounting aluminum profile 640, which drives the fourth mounting aluminum profile 644 to slide up and down together with the third mounting aluminum profile 640. At the same time, the angle can be finely adjusted by driving the second motor 641.

[0156] The fourth mounting aluminum profile 644 has a linear array of multiple insertion and stacking claws 645 at the end away from the second motor 641. The arrangement position of each insertion and stacking claw 645 corresponds one-to-one with the receiving and stacking claws 635 of the receiving group 63 and is appropriately spaced. The ends of the insertion and stacking claws 645 are designed with a smooth arc structure to avoid scratching the surface of the wet toilet paper.

[0157] During operation, when the number of wet toilet paper stacks received by the receiving and splitting claws 635 of the receiving group 63 reaches a preset value, the second motor 641 starts, driving the second rotating shaft 642 to rotate. This, through the second insertion arm 643, drives the fourth mounting aluminum profile 644 to move, causing multiple insertion and splitting claws 645 to precisely insert between the receiving and splitting claws 635 and the wet toilet paper, working together with the receiving and splitting claws 635 to clamp the wet toilet paper. Subsequently, the insertion group 64 and the receiving group 63 move downwards synchronously, tearing the clamped wet toilet paper off the receiving and splitting claws 635 and smoothly conveying it to the lifting receiving group 65 below, completing the quantitative transfer of wet toilet paper, providing stable support for subsequent conveying processes, and ensuring that the entire machine operates smoothly and efficiently.

[0158] The lifting support assembly 65 includes a lifting aluminum profile 650 that is slidably installed between two mounting wall panels 21.

[0159] The lifting aluminum profile 650 achieves guided sliding through the cooperation of the slider and the slide rail, and is consistent with the sliding structure of the receiving group 63 and the insertion group 64, ensuring the adaptability and coordination of the sliding parts of the whole machine, and ensuring that the lifting process is smooth and accurate, without jamming or deviation.

[0160] The lifting aluminum profile 650 is provided with a plurality of lifting receiving claws 651 evenly spaced on one side near the first shift fork group 61. The position of each lifting receiving claw 651 corresponds one-to-one with the receiving and stacking claws 635 of the receiving group 63 and the insertion and stacking claws 645 of the insertion group 64. The lifting receiving claws 651 adopt an arc-shaped lifting structure with a smooth surface, which can reliably receive wet toilet paper and avoid scratching the surface of the wet toilet paper, preventing the wet toilet paper from being damaged or wrinkled due to friction.

[0161] A lifting drive device 66 is provided at the bottom of the two mounting wall panels 21.

[0162] The lifting drive device 66 includes a plurality of lifting control motors 660 mounted on one of the mounting wall panels 21.

[0163] The power output shaft of the lifting control motor 660 is fixedly connected to a third transmission shaft via a coupling, and multiple third transmission shafts are rotatably mounted on two mounting wall plates 21.

[0164] The other end of each of the multiple third drive shafts is connected to a lifting belt 661 via pulleys along the height direction of the mounting wall panel 21.

[0165] The first mounting aluminum profile 630, the third mounting aluminum profile 640, and the lifting aluminum profile 650, which need to slide up and down, are all fixedly connected to the corresponding lifting belt 661 through the locking plate assembly 662, so as to realize that each component moves up and down synchronously and accurately with the lifting belt 661.

[0166] After the receiving group 63 and the insertion group 64 complete the quantitative clamping of wet toilet paper, the lifting drive device 66 drives each aluminum profile to descend synchronously, so that the lifting receiving claw 651 accurately connects and supports the wet toilet paper; then, the lifting belt 661 drives the lifting aluminum profile 650 to continue to descend, smoothly transferring the wet toilet paper to the preset height of the horizontal conveying group 7, realizing the fully automated connection of the entire process from receiving, clamping to transfer, effectively improving the overall operating efficiency and the stability of the finished product quality.

[0167] The transverse conveying group 7 includes a transverse conveyor belt 71 set on two mounting wall panels 21. The transverse conveyor belt 71 is positioned corresponding to the lifting receiving group 65 and is used to receive and transversely convey the wet toilet paper transferred by the lifting receiving group 65.

[0168] The specific structure and installation method of the transverse conveyor belt 71 are well known in the prior art and will not be described in detail here.

[0169] The output end of the transverse conveyor belt 71 is provided with a pushing device 72, which is used to push the wet toilet paper at the output end of the transverse conveyor belt 71 to the longitudinal conveyor group 8.

[0170] The pushing device 72 includes two upright plates, which are fixedly installed on both sides of the output end of the transverse conveyor belt 71. A sliding plate is installed between the two upright plates by means of a lifting cylinder, which can slide up and down. The two ends of the sliding plate are controlled by a rotary cylinder, which can rotate the plate. Multiple pushing rods 721 are evenly spaced on the sliding plate.

[0171] When there is wet toilet paper to be pushed at the output end of the transverse conveyor belt 71, the lifting cylinder drives the sliding plate to move down, so that the lower end of the push rod 721 moves to the side where the wet toilet paper is away from the longitudinal conveyor group 8; then the rotary cylinder starts, driving the push rod 721 to rotate, and smoothly pushes the wet toilet paper onto the longitudinal conveyor group 8, completing the transverse to longitudinal conveying switch.

[0172] The longitudinal conveying group 8 adopts a conveyor belt conveying structure. Its specific construction and conveying principle are existing technologies and will not be described in detail here.

[0173] The longitudinal conveyor group 8 is used to convey wet toilet paper that has been processed by cutting and folding, so as to realize the orderly flow of materials from the conveying process to the packaging process, effectively improving the processing efficiency of the whole machine and the stability of the finished product quality.

[0174] A weighing device (not shown in the figure) is also installed between the longitudinal conveyor group 8 and the packaging machine. The weighing device is used to detect the weight of each stack of wet toilet paper and to determine whether its liquid content meets the preset standard by weight conversion, so as to realize online detection and control of the quality of the finished product.

[0175] The folding machine is also equipped with a control mechanism for controlling its operation. The control mechanism is connected to the cutting drive device 34, the spiral knife assembly 3, the front folding roller group 4, the rear folding roller group 5, the shift fork device 6, the lifting drive device 66, the transverse conveying group 7, and the longitudinal conveying group 8. It is used to integrate and control the action sequence, operating status, and mode switching of each component of the machine, so as to realize the automated and continuous operation of cutting, folding, transferring, and conveying wet toilet paper.

[0176] According to the preset finished product specifications, the control mechanism controls the corresponding spiral knife assembly 3 to start, and works with the front folding roller group 4 or the rear folding roller group 5 to complete the cutting of the paper strip and Z-shaped / half-folding; synchronously drive the front and rear shift fork groups to alternately move, peeling the formed wet toilet paper from the roller shaft; through the lifting drive device 66, the lifting displacement of the receiving group 63, the insertion group 64 and the lifting receiving group 65 is precisely controlled, and the quantitative receiving, clamping and transfer of wet toilet paper is completed by using the one-to-one corresponding receiving and stacking claws 635, the insertion and stacking claws 645 and the lifting receiving claws 651; then the transverse conveying group 7 is controlled to transport the material to the output end, and the material is pushed to the longitudinal conveying group 8 by the pushing device 72, and finally the qualified material is transported to the subsequent weighing and packaging process.

[0177] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A multi-mode wet toilet paper slitting and folding machine, comprising two symmetrically spaced protective covers (1), characterized in that: A frame assembly (2) is installed inside the two protective covers (1). A spraying device (23) is installed at the upper end of the frame assembly (2). Two sets of symmetrically spaced cutting knife assemblies (22) are installed on the frame assembly (2) below the spraying device (23) to longitudinally cut the raw paper. Two sets of parallel spiral knife assemblies (3) are installed on the frame assembly (2) below the cutting knife assembly (22) to transversely cut the longitudinally cut paper strip. A front folding roller group (4) and a rear folding roller group (5) are rotatably installed on the frame assembly (2) at positions corresponding to the two sets of spiral knife assemblies (3). The front folding roller group (4) and the rear folding roller group (5) rotate towards each other. A shift fork device (6) is installed on the frame assembly (2) below the front folding roller group (4) and the rear folding roller group (5). A transverse conveying group (7) is installed on the frame assembly (2) below the shift fork device (6). A longitudinal conveying group (8) is installed at the output end of the transverse conveying group (7). The front folding roller group (4) includes a front folding roller shaft (41) rotatably mounted on the frame assembly (2). The outer surface of the front folding roller shaft (41) has multiple sets of first suction holes (42) arranged in a linear array, which can be used to adsorb and fix the paper tape by negative pressure. The outer surface of the front folding roller shaft (41) is also provided with three first moving blades (43) arranged in a ring array, and a paper folding blade (44) is fixedly installed at the adjacent position of each first moving blade (43). The paper tape can be folded into a Z-shape and cut into the cutting line by the first moving blade (43). The rear folding roller group (5) includes a rear folding roller shaft (51) rotatably mounted on the frame assembly (2). The outer surface of the rear folding roller shaft (51) has multiple sets of second suction holes (52) arranged in a linear array for negative pressure adsorption and positioning of the paper tape. The outer surface of the rear folding roller shaft (51) is provided with three second moving blades (53) arranged in a ring array, which can precisely cooperate with the folding blade (44) of the front folding roller group (4) to realize the folding action of the wet toilet paper and simultaneously complete the folding and cutting of the blade line.

2. The multi-mode wet toilet paper slitting and folding machine according to claim 1, characterized in that: The frame component (2) includes two mounting wall panels (21) arranged symmetrically at intervals. The cutter assembly (22) includes a stainless steel air pipe (223) fixedly installed between two mounting wall panels (21), a knife holder (220) fixedly installed on the upper surface of the stainless steel air pipe (223), and multiple pneumatic cutters (221) adjustablely installed on the mounting surface of the knife holder (220). Two sets of symmetrically arranged paper-feeding roller assemblies (24) are also rotatably installed between the two mounting wall panels (21), and each set of paper-feeding roller assemblies (24) is matched with the corresponding cutting blade assembly (22); The paper feeder roller assembly (24) includes a roller body that is rotatably mounted between two mounting wall plates (21). Multiple slots corresponding to the pneumatic cutter (221) are opened on the surface of the roller body. The blade of the pneumatic cutter (221) extends into the slot to longitudinally cut the raw paper into paper strips.

3. The multi-mode wet toilet paper slitting and folding machine according to claim 2, characterized in that: The spiral blade assembly (3) includes a spiral blade shaft (31) rotatably mounted between two mounting wall plates (21). One end of the spiral blade shaft (31) passes through one side of the mounting wall plate (21) and is fixedly connected to a blade cutting drive device (34), which drives the spiral blade shaft (31) to rotate. A blade plate (32) is fixedly installed on the outer surface of the spiral cutter shaft (31) by bolts. The blade plate (32) is arranged at a spiral angle relative to the axis of the spiral cutter shaft (31). Multiple pressure plates (33) are detachably installed on the outer surface of the blade plate (32) by bolts. A cutting blade is clamped and fixed between the pressure plate (33) and the blade plate (32).

4. The multi-mode wet toilet paper slitting and folding machine according to claim 3, characterized in that: The two sets of spiral knife assemblies (3) are independently controlled and work independently, and can realize multi-mode switching cutting: when producing Z-shaped folded wet toilet paper, the direction of the raw paper is changed so that the raw paper is wrapped around the surface of the front folding roller group (4) and the spiral knife assembly (3) works in conjunction with the front folding roller group (4). When producing folded wet toilet paper, the paper feed path is adjusted so that the paper is wrapped around the surface of the rear folding roller group (5) and operated by the spiral knife assembly (3) that cooperates with the rear folding roller group (5).

5. A multi-mode wet toilet paper slitting and folding machine according to claim 4, characterized in that: The fork device (6) includes a first fork group (61) disposed on two mounting wall plates (21). The first fork group (61) is located near the lower part of the front folding roller shaft (41) and acts on the front folding roller shaft (41) to peel the wet toilet paper that has been cut from the front folding roller shaft (41). Multiple first annular grooves are opened on the front folding roller shaft (41) at the position corresponding to the first shift fork group (61) so that the first shift fork group (61) can extend into it and realize the peeling action; Both ends of the front folding roller shaft (41) are fixedly installed with front gear sets (45) after passing through the corresponding mounting wall plates (21).

6. A multi-mode wet toilet paper slitting and folding machine according to claim 5, characterized in that: A second shift fork assembly (62) is also provided between the two mounting wall panels (21). The second shift fork assembly (62) is located near the lower part of the rear folding roller shaft (51) and acts on the rear folding roller shaft (51). Multiple second annular grooves are provided on the rear folding roller shaft (51) at the corresponding positions of the second shift fork group (62) so that the second shift fork group (62) can extend into it and perform the peeling action; Both ends of the rear folding roller shaft (51) are fixedly installed with rear gear sets (54) after passing through the corresponding mounting wall plates (21).

7. A multi-mode wet toilet paper slitting and folding machine according to claim 6, characterized in that: Below the first fork group (61) and the second fork group (62), a receiving group (63) and an insertion group (64) are slidably installed. The receiving group (63) receives the wet toilet paper peeled off by the first fork group (61) and the second fork group (62). When the number of wet toilet paper reaches a preset value, the insertion group (64) is inserted and tears off the wet toilet paper and conveys it downward.

8. A multi-mode wet toilet paper slitting and folding machine according to claim 7, characterized in that: A lifting receiving group (65) is slidably installed between the two mounting wall panels (21) at a position below the receiving group (63). The wet toilet paper sandwiched between the receiving group (63) and the insertion group (64) is received by the lifting receiving group (65) and then transported to the horizontal conveying group (7).

9. A multi-mode wet toilet paper slitting and folding machine according to claim 8, characterized in that: The first shift fork assembly (61) includes a first rotating shaft (610) rotatably mounted on two mounting wall plates (21). One end of the first rotating shaft (610) passes through the corresponding mounting wall plate (21) and is fixedly connected to a first shift fork transmission assembly (613). The other end of the first shift fork transmission assembly (613) is hinged to a first shift fork gear assembly (611). The first shift fork gear assembly (611) meshes with the front gear assembly (45). The first rotating shaft (610) has a plurality of first forks (612) arranged in a linear array on the side facing the front folding roller shaft (41). The first forks (612) can extend into the first annular groove on the surface of the front folding roller shaft (41) to peel off the cut and folded wet toilet paper.

10. A multi-mode wet toilet paper slitting and folding machine according to claim 9, characterized in that: The second shift fork assembly (62) includes a second rotating shaft (620) rotatably mounted between two mounting wall plates (21). One end of the second rotating shaft (620) passes through the corresponding mounting wall plate (21) and is fixedly connected to a second shift fork transmission assembly (623). The other end of the second shift fork transmission assembly (623) is hinged to a second shift fork gear assembly (621). The second shift fork gear assembly (621) meshes with the rear gear assembly (54). The second rotating shaft (620) has a plurality of second forks (622) arranged in a linear array on the side facing the rear folding roller shaft (51). The second forks (622) can extend into the second annular groove on the surface of the rear folding roller shaft (51) to peel off the cut and folded wet toilet paper.

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