Cigarette aluminum foil packaging forming mechanism and method for reducing inner liner paper conveying deviation

Abstract

The application discloses a cigarette aluminum foil packaging forming mechanism and method for reducing the conveying deviation of inner liner paper, and the forming mechanism comprises a positioning reference plate, a middle folding rail member detachably connected to the middle part of the positioning reference plate, side folding rail members having two groups and detachably connected to the two side parts of the positioning reference plate, the two groups of side folding rail members being symmetrically arranged relative to the middle folding rail member, and double channels for aluminum foil paper folding being formed between the two groups of side folding rail members and the middle folding rail member; the positioning reference plate is provided with customized positioning structures between the middle folding rail member and the side folding rail members, and the positioning structures ensure the uniformity and linearity of the double channels during forming; and an adjusting module is detachably connected to a module positioning groove and used for standardizing and adjusting the spacing of the folding channels. The application adjusts the installation reference of the related components during the forming of the folding channels through the adjusting module and the positioning structure, so that the uniformity and linearity of the double folding channels are ensured.

Description

Technical Field

[0001] This invention belongs to the technical field of tobacco packaging equipment, specifically relating to a cigarette aluminum foil packaging forming mechanism and method for reducing the offset of the inner liner paper conveying. Background Technology

[0002] The existing ZB418 double aluminum foil packaging machine (modified from the ZB48 domestic machine, with the same core structure and adapted to double aluminum foil packaging requirements) relies on multi-step folding of folding guide rails and reciprocating mold boxes, as well as pre-adjustment and positioning by adjustment modules 3 and 4, in tobacco packaging production. However, the folding plates (folding rails) lack precise installation benchmarks, the screw hole settings of the guide and positioning components are unreasonable, and high-precision CNC machining technology is not effectively applied, resulting in large coaxiality deviations after plate installation. The system is ill-suited to the high-speed operation requirements of the unit (800 packs / min). During high-speed operation, the folding components vibrate rapidly, affecting the inner liner paper conveying and causing issues such as "broken ends" and "reverse packaging." Furthermore, the folding channel formed by the folding components has low coaxiality due to existing assembly, making it prone to installation deviations at high speeds. Simultaneously, the inner liner paper (compliant with unit specifications: length 220mm, width 80mm, basis weight 55~75g / m², thickness 45~75μm) conveying stability is insufficient, easily leading to "broken ends" and "reverse packaging" problems. The folding accuracy of the aluminum foil paper is affected, resulting in a high rejection rate of substandard cigarette packs. This restricts the improvement of unit production efficiency and double aluminum pack packaging quality, and fails to fully realize the design advantage of an effective operating rate of ≥85%.

[0003] Therefore, how to provide a cigarette aluminum foil packaging forming mechanism and method to reduce the offset of the inner liner paper is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0004] In view of this, the present invention provides a cigarette aluminum foil packaging forming mechanism and method for reducing the offset of the inner liner paper conveying, which improves the installation accuracy of the folding forming mechanism, has strong vibration resistance, and meets the production requirements of high efficiency and high quality.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a cigarette aluminum foil packaging forming mechanism for reducing the offset of inner liner paper conveying, comprising: a positioning reference plate, wherein the positioning reference plate is used to connect the machine base of the double aluminum packaging unit and to serve as the bearing base for the folding rail component;

[0006] A middle folding rail component, which is detachably connected to the middle part of the positioning reference plate; The side folding rails consist of two sets, detachably connected to the two sides of the positioning reference plate. The two sets of side folding rails are symmetrically arranged relative to the middle folding rail, forming a double channel for aluminum foil folding between the two sets of side folding rails and the middle folding rail. The positioning reference plate is provided with module positioning grooves at the ends of the aluminum foil folding channels. The positioning reference plate is provided with customized positioning structures between itself and the middle folding rail and the side folding rail, respectively, and the positioning structures ensure the uniformity and linearity of the double channel forming. An adjustment module is detachably connected to the module positioning slot and is used to standardize and adjust the spacing of the folding channels.

[0007] The beneficial technical effects of this invention are as follows: Although dual-channel folding can improve production efficiency, it requires high installation accuracy for the related folding rails of dual-channel forming. It needs to have high uniformity and linearity, otherwise folding deviations of the folding channels will occur, resulting in broken ends or reverse wrapping. A high-precision positioning structure is added to the existing assembly to ensure the installation accuracy and benchmark of the related folding rails of dual-channel forming. With the help of the adjustment module, the initial spacing and positioning of the folding channels are adjusted, thereby ensuring the uniformity and parallelism of the dual folding channels, ensuring the sequential folding of aluminum foil, and avoiding the offset of aluminum foil during folding.

[0008] Preferably, it also includes reinforcing plates, which are multiple in number. The middle folding rail has extended suspended rail portions on both sides, and the side folding rail has a suspended rail portion on the side near the middle folding rail. The multiple reinforcing plates are respectively fixedly connected to the suspended rail portions corresponding to the middle folding rail and the side folding rail, thereby improving the rigidity of the suspended rail portions.

[0009] The resulting technical effect is that, due to the characteristics of aluminum foil folding, its folding rail has a suspended rail section, which will generate a certain amplitude of vibration when the equipment is running at high intensity. This vibration will affect the accuracy and quality of aluminum foil folding. Adding relevant reinforcing plates can improve the rigidity of the folding rail, reduce vibration, and indirectly improve the stability of the folding forming mechanism during operation.

[0010] Preferably, the adjustment module includes an aluminum foil folding channel adjustment module and a reciprocating mold box adjustment module. The bottom side of the aluminum foil folding channel adjustment module is provided with a protruding rib, which can be embedded and positioned in the module positioning groove. The width of the aluminum foil folding channel adjustment module provides a reference for the spacing between the side folding rail and the middle folding rail forming the folding channel. The reciprocating mold box adjustment module is used to adjust the spacing between the inner and outer mold boxes of the dual-channel reciprocating mold box.

[0011] The resulting technical effects are as follows: the aluminum foil folding channel adjustment module is used to adjust the spacing of the positioning folding channel, that is, the spacing between the side folding rail and the middle folding rail, and can also adjust the parallelism between the side folding rail and the middle folding rail; the reciprocating mold box adjustment module is used to adjust the spacing between the inner and outer mold boxes.

[0012] Preferably, the width of the rib is 8mm, and the fit clearance between the rib and the module positioning groove is 0.02mm; the reciprocating mold box adjustment module has a small end and a large end, and the reciprocating mold box adjustment module has protrusions on both sides corresponding to the large end. The width of the small end of the reciprocating mold box adjustment module is 5mm, and the interference fit between the small end of the reciprocating mold box adjustment module and the reciprocating mold box is 0.01mm, ensuring that the positioning accuracy of the inner and outer mold boxes of the reciprocating mold box is ±0.01mm.

[0013] The resulting technical effect is that the ribs enable accurate installation of the aluminum foil folding channel adjustment module. At the same time, the gap between the ribs and the module positioning groove is required to ensure that the inner and outer spacing error of the folding guide rail is ≤0.02mm and the inner and outer positioning accuracy of the reciprocating mold box is ±0.01mm.

[0014] Preferably, it also includes an identification structure, which is disposed on the aluminum foil folding channel adjustment module and the reciprocating mold box adjustment module and is used to assist the operator in determining the installation accuracy of the aluminum foil folding channel adjustment module and the reciprocating mold box adjustment module.

[0015] The resulting technical effect is that the marking structure allows operators to easily confirm, by observing or touching this high-precision marking feature, whether the tooling has been fully and horizontally inserted into the positioning reference of the equipment when installing the adjustment module, thus preventing the adjustment module from being installed crookedly and causing adjustment errors.

[0016] Preferably, it also includes a folding channel cover plate, which is fixedly disposed on the upper side of the intermediate folding rail and the side folding rail. An auxiliary positioning baffle is provided between the folding channel cover plate and the intermediate folding rail and the side folding rail. The auxiliary positioning baffle can limit and block the edge of the inner lining paper to prevent the inner lining paper from deviating during the folding process.

[0017] The resulting technical effect is that the relevant auxiliary positioning baffle is set as a strip plate in specific implementation. The setting direction of the strip plate is parallel to the conveying direction of the folding channel. Its function is to position, limit and block the edges of the inner lining paper on the left and right sides to prevent the inner lining paper from deviating and further ensure the folding accuracy of the inner lining paper.

[0018] Preferably, the folding channel cover plate has multiple countersunk screw holes near its two ends. The multiple countersunk screw holes at both ends are symmetrically distributed with respect to the middle folding rail. The countersunk screw holes are connected to auxiliary positioning baffles by connecting screws. The depth of the countersunk screw holes is 3mm + 0.05mm. Screws are installed in the countersunk screw holes and the screw heads are embedded in the countersunk screw holes.

[0019] The resulting technical effects are: the auxiliary positioning baffle also improves the rigidity of the folding channel cover, further reducing the vibration of the cover during equipment operation; and the use of countersunk screws is due to limited space, making installation and use easier.

[0020] Preferably, the positioning structure is an M3 screw. The positioning reference plate has multiple M3 screw holes symmetrically opened on both sides of the center line of the aluminum foil folding channel. The middle folding rail and the side folding rail are provided with multiple mating holes. The M3 screw holes and the mating holes have the same diameter and the coaxiality error is less than 0.02mm. The M3 screw is used to connect the coaxially arranged M3 screw holes and the mating holes and improve the installation accuracy of the middle folding rail, the side folding rail and the positioning reference plate.

[0021] The resulting technical effect is that by adding high-precision M3 screw holes and screws, the folding rail components and positioning reference plate can be installed with high precision, thereby ensuring the uniformity and installation stability of the double folding channel.

[0022] Preferably, the multiple mating holes of the intermediate folding rail and the side folding rail are symmetrically arranged parallel to the direction of the folding channel. The hole spacing of the multiple mating holes on the intermediate folding rail and the side folding rail is 15mm. The hole spacing error between the intermediate folding rail and the multiple M3 screw holes corresponding to the positioning reference plate is less than 0.02mm. The hole spacing error between the multiple mating holes of the side folding rail and the multiple M3 screw holes corresponding to the positioning reference plate is less than 0.02mm. The M3 screw holes and mating holes are machined using a CNC drilling machine with a positioning accuracy of ±0.01mm. The hole spacing accuracy is controlled in real time by the XY axis grating ruler of the drilling machine, and the hole depth is precisely controlled by the Z axis depth limiter.

[0023] The resulting technical effect is that the hole spacing of the relevant M3 screw holes on the folding rail needs to correspond to the hole spacing of the corresponding M3 screw holes on the positioning reference plate, and the error is small, thereby ensuring the installation accuracy and installation requirements of the folding rail and the positioning reference plate.

[0024] Preferably, the present invention also discloses a positioning optimization method based on the aluminum foil packaging forming mechanism as described in any one of claims 1-9, which includes the following steps: S1: The positioning reference plate, folding rail and folding channel cover plate are machined with screw holes and countersunk holes using a CNC drilling machine with a positioning accuracy of ±0.01mm. The feed speed of the M3 screw hole drill bit of the positioning reference plate is 0.1mm / revolution. The hole spacing and hole depth accuracy are controlled by the XY axis grating ruler and the Z axis depth limiter of the drilling machine, respectively. S2: The reinforced plate and the machined folding rail are joined at 3N... The torque m is used to tighten and fix the assembly using a torque wrench; S3: Position the aluminum foil paper folding channel adjustment module by vertically inserting it into the module positioning slot, and position the reciprocating mold box adjustment module by inserting it into the limiting slot of the reciprocating mold box along the folding channel conveying direction. Combined with the multiple high-precision screw holes arranged along the folding channel direction on the positioning reference plate, a dual positioning adjustment is formed. S4: During the conveying of the tobacco pack products along the folding and forming direction, the aluminum foil paper is precisely folded by relying on the dual positioning adjustment of S3, so that the conveying deviation of the inner lining paper is ≤0.03mm, and the amount of tobacco packs rejected due to unstable conveying is reduced by more than 85%.

[0025] The beneficial technical effects of this invention are: by adding high-precision holes to the plates, CNC machining to ensure coaxiality, adjusting the module, and reinforcing the plates, this invention solves the problems of unstable inner lining paper feeding, cigarette pack folding deviation, and high rejection rate. It does not require large-scale changes to the existing packaging machine structure and improves the forming quality with a smaller cost and improvements. Attached Figure Description

[0026] Figure 1 This is a structural diagram of a cigarette aluminum foil packaging forming mechanism for reducing the conveying offset of the inner liner paper according to the present invention; Figure 2 This is a schematic diagram of the folding channel of a cigarette aluminum foil packaging forming mechanism for reducing the conveying offset of the inner liner paper according to the present invention; Figure 3 This is a schematic diagram of an aluminum foil folding channel adjustment module for a cigarette aluminum foil packaging forming mechanism that reduces the conveying offset of the inner liner paper according to the present invention. Figure 4 This is a schematic diagram of the reciprocating mold box adjustment module of a cigarette aluminum foil packaging forming mechanism for reducing the offset of the inner liner paper according to the present invention. Figure 5 This is a schematic diagram of the aluminum foil folding process of the present invention.

[0027] 1. Positioning reference plate, 2. Middle folding rail, 3. Side folding rail, 4. Folding channel, 5. Adjustment module, 51. Aluminum foil folding channel adjustment module, 511. Rib, 52. Reciprocating mold box adjustment module, 521. Small end, 522. Large end, 53. Marking structure, 6. Reinforcing plate, 7. Folding channel cover plate, 8. Reciprocating mold box, 81. Inner mold box, 82. Outer mold box, 9. Positioning structure. Detailed Implementation

[0028] 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, and 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.

[0029] The reciprocating mold box mentioned in this article is a dual-channel reciprocating mold box. Its function is to transport two cigarette packs wrapped with aluminum foil from the cigarette guide rail to the reciprocating mold box, and fold the aluminum foil at the filter tip. The cigarette packs, fully wrapped with aluminum foil, along with the added inner frame paper, are pushed into the reciprocating mold box in parallel.

[0030] The function of the middle folding rail and the side folding rail is that after the cigarette pack is pushed into the reciprocating mold box, the folding channel formed by them will fold the embossed aluminum foil, so that each cigarette pack is wrapped in aluminum foil.

[0031] See the appendix of this invention. Figures 1 to 5 According to an embodiment of the present invention, a cigarette aluminum foil packaging forming mechanism for reducing the offset of inner liner paper conveying includes: a positioning reference plate 1, which is used to connect the machine base of the double aluminum packaging unit and to serve as the bearing base of the folding rail component; The middle folding rail 2 is detachably connected to the middle part of the positioning reference plate 1; Side folding rail 3, two sets of side folding rail 3 are detachably connected to the two sides of the positioning reference plate 1. The two sets of side folding rail 3 are symmetrically arranged relative to the middle folding rail 2. A double channel of aluminum foil folding is formed between the two sets of side folding rail 3 and the middle folding rail 2. The positioning reference plate 1 is provided with a module positioning groove at the end of the aluminum foil folding channel 4. The positioning reference plate 1 is provided with a customized positioning structure 9 between the middle folding rail 2 and the side folding rail 3 respectively, and the uniformity and linearity of the double channel forming are ensured based on the positioning structure. Adjustment module 5 is detachably connected to the module positioning slot and is used to standardize and adjust the spacing of the folding channel. Adjustment module 5 is used when the equipment is shut down for production change or maintenance and debugging. After debugging is completed (i.e., after the screws are tightened to lock the position), the adjustment module must be removed, otherwise it will directly block the folding channel of the aluminum foil or hinder the movement of the reciprocating mold box, resulting in production failure.

[0032] In other embodiments, it also includes six reinforcing plates 6. The middle folding rail 2 has outwardly extending suspended rail portions on both sides, and the side folding rail 3 has a suspended rail portion on the side near the middle folding rail 2. Four reinforcing plates 6 are fixedly connected to the upper and lower sides of the two suspended rail portions of the middle folding rail 2, and two reinforcing plates 6 are fixed to the lower side of the corresponding suspended rail portion of the side folding rail 3, which increases the connection stiffness between the relevant plates by about 20%.

[0033] In some other specific embodiments, the adjustment module 5 includes an aluminum foil folding channel adjustment module 51 and a reciprocating mold box adjustment module 52. The bottom side of the aluminum foil folding channel adjustment module 51 is provided with a protruding rib 511, which can be embedded and positioned in the module positioning groove. The width of the aluminum foil folding channel adjustment module 51 provides a reference for the spacing between the side folding rail 3 and the middle folding rail 2 to form the folding channel. The reciprocating mold box adjustment module is used to adjust the spacing between the inner and outer mold boxes of the dual-channel reciprocating mold box 8.

[0034] In some other specific embodiments, the width of the rib 511 is 8mm, and the fit clearance between the rib 511 and the module positioning groove is 0.02mm; the reciprocating mold box adjustment module 52 has a small end 521 and a large end 522, and the reciprocating mold box adjustment module 52 has protrusions on both sides corresponding to the large end 522. The width of the small end of the reciprocating mold box adjustment module 52 is 5mm, and the interference between the small end of the reciprocating mold box adjustment module 52 and the reciprocating mold box 8 is 0.01mm, ensuring the positioning accuracy of the inner and outer mold boxes of the reciprocating mold box is ±0.01mm.

[0035] In some other embodiments, a marking structure 53 is also included, which can be a raised marking with shallow marking grooves on the relevant plate. The marking structure 53 is provided on the surface or end face of the aluminum foil folding channel adjustment module 51 and the reciprocating mold box adjustment module 52, and is used to assist the operator in determining the installation accuracy of the aluminum foil folding channel adjustment module 51 and the reciprocating mold box adjustment module 52.

[0036] In some other specific embodiments, a folding channel cover plate 7 is also included. The folding channel cover plate 7 is fixedly disposed on the upper side of the middle folding rail 2 and the side folding rail 3. An auxiliary positioning baffle is provided between the folding channel cover plate 7 and the middle folding rail 2 and the side folding rail 3. The function of the auxiliary positioning baffle is to position, limit and block the edges of the inner lining paper on the left and right sides to prevent the inner lining paper from deviating and further ensure the folding accuracy of the inner lining paper.

[0037] In some other specific embodiments, the folding channel cover plate 7 is provided with multiple screw countersunk holes near its two ends. The multiple screw countersunk holes at both ends are symmetrically distributed relative to the middle folding rail. The screw countersunk holes are fixed with auxiliary positioning baffles by connectors. The depth of the screw countersunk holes is 3mm + 0.05mm. Screws are installed in the screw countersunk holes and the screw heads are embedded in the screw countersunk holes.

[0038] In some other embodiments, the positioning structure 9 is an M3 screw. The positioning reference plate 1 has multiple M3 screw holes symmetrically opened on both sides of the center line of the aluminum foil folding channel. The middle folding rail 2 and the side folding rail 3 are provided with multiple mating holes. The M3 screw holes and the mating holes have the same diameter and the coaxiality error is less than 0.02mm. The M3 screw is used to connect the coaxially arranged M3 screw holes and the mating holes and improve the installation accuracy of the middle folding rail 2, the side folding rail 3 and the positioning reference plate 1.

[0039] Specifically, the multiple mating holes of the middle folding rail 2 and the side folding rail 3 are symmetrically arranged parallel to the direction of the folding channel. The hole spacing of the multiple mating holes on the middle folding rail 2 and the side folding rail 3 is 15mm. The hole spacing error between the middle folding rail 2 and the multiple M3 screw holes corresponding to the positioning reference plate 1 is less than 0.02mm. The hole spacing error between the multiple mating holes of the side folding rail 3 and the multiple M3 screw holes corresponding to the positioning reference plate 1 is less than 0.02mm. The M3 screw holes and mating holes are machined by a CNC drilling machine with a positioning accuracy of ±0.01mm. The hole spacing accuracy is controlled in real time by the XY axis grating ruler of the drilling machine, and the hole depth is precisely controlled by the Z axis depth limiter.

[0040] This invention also discloses a positioning optimization method based on the above-mentioned aluminum foil packaging forming mechanism, which includes the following steps: S1: The positioning reference plate, folding rail and folding channel cover plate are machined with screw holes and countersunk holes using a CNC drilling machine with a positioning accuracy of ±0.01mm. The feed speed of the M3 screw hole drill bit of the positioning reference plate is 0.1mm / revolution. The hole spacing and hole depth accuracy are controlled by the XY axis grating ruler and the Z axis depth limiter of the drilling machine, respectively. S2: The reinforced plate and the machined folding rail are joined at 3N... The torque m is used to tighten and fix the assembly using a torque wrench; S3: Position the aluminum foil paper folding channel adjustment module by vertically inserting it into the module positioning slot, and position the reciprocating mold box adjustment module by inserting it into the limiting slot of the reciprocating mold box along the folding channel conveying direction. Combined with the multiple high-precision screw holes arranged along the folding channel direction on the positioning reference plate, a dual positioning adjustment is formed. S4: During the conveying of the tobacco pack products along the folding and forming direction, the aluminum foil paper is precisely folded by relying on the dual positioning adjustment of S3, so that the conveying deviation of the inner lining paper is ≤0.03mm, and the amount of tobacco packs rejected due to unstable conveying is reduced by more than 85%.

[0041] This invention features a customized, precise hole design for sheet metal parts, solving the positioning problem of double aluminum cladding. Unlike existing technologies that lack a unified installation benchmark and have messy screw hole settings, this invention specifically designs M3 screw holes (hole spacing 15mm+0.02mm, depth 8mm+0.1mm) on the positioning benchmark plate and countersunk holes (3mm+0.05mm) on the folding channel cover plate. Furthermore, the screw holes on the benchmark plate are symmetrically arranged along the product conveying direction (X direction), perfectly adapting to the ZB418 double aluminum cladding symmetrical packaging structure, thus fundamentally solving the problem of unstable conveying caused by coaxiality deviation.

[0042] The positioning mechanism is optimized to enhance the stability of high-speed operation: It breaks through the limitation of relying solely on the single positioning of adjustment modules #3 and #4. Adjustment modules #3 and #4 refer to the aluminum foil folding channel adjustment module 51 and the reciprocating mold box adjustment module 52 in this paper, respectively. The optimized plate reference and module positioning logic are deeply combined - module #3 fixes the folding guide rail along the Z direction, and module #4 limits the reciprocating mold box along the X direction, forming a dual guarantee of "plate reference + module positioning", which is suitable for the high-speed operation requirements of ZB418 unit of 800 packs / min. At the same time, it inherits the mature high-speed cam technology of ZB48 unit to further reduce the impact of vibration.

[0043] The forming mechanism of this invention is based on the modification of a mature model, achieving low cost and high adaptability: there is no need to redesign the whole machine. It is specifically optimized on the core structure of the ZB48 unit, perfectly compatible with its advantages such as dual channels and automated material conveying, while adapting to the special requirements of double aluminum cladding packaging. The modification cost is low, the cycle is short, and it does not affect the original effective operating rate design of the unit of ≥85%, taking into account both practicality and economy.

[0044] Designed to fit material characteristics, enhancing packaging adaptability: Closely integrating key parameters of the inner liner paper (basis weight 55~75g / m², thickness 45~75μm, static friction coefficient ≤0.25), and through designs such as controlling the spacing of folding rails (≤0.02mm) and optimizing the folding angular velocity (8°~10° / ms), the aluminum foil forming degree is ensured to be ≤25°. This dual reduction in defect rate from the perspectives of mechanical structure and material characteristic adaptation is a targeted optimization lacking in existing generalized designs.

[0045] In this scheme, a spatial coordinate system is established with the tobacco conveying direction as the X-axis and the vertical direction of the equipment installation plane as the Z-axis for the mechanical components. Each core component is positioned as follows: The aluminum foil folding channel adjustment module 51 is located in the aluminum foil folding guide rail area (middle folding rail and side folding rail), vertically inserted into the module positioning slot, so that the protruding rib below the module body is engaged in the equipment's reference slot (module positioning slot) along the vertical direction (Z-axis). This is to fix the adjustment module itself, preventing it from shaking or deviating in height during measurement; the reciprocating mold box adjustment module 52 is located in the reciprocating mold box area, limiting the inner and outer mold boxes along the X-axis; the folding channel cover plate 7 is located above the folding channel (conveyor channel).

[0046] In this project, the first step was to perform high-precision drilling and assembly of the positioning reference plate, folding rail components, and other related plates. Next, the process moved to the tobacco pack conveying and aluminum foil forming stage. The ZB418 unit utilizes the dual-channel structure and high-speed cam technology of the ZB48. The tobacco pack is conveyed along the X direction by the first conveyor chain pusher at a speed suitable for a capacity of 800 packs / minute. The contact pressure between the pusher and the tobacco pack is stabilized at 5N±0.5N. The curved trajectory of the high-speed cam reduces acceleration variations and lowers unit vibration. A single sheet of aluminum foil (meeting ZB418 unit specifications: length 220mm, width 80mm, basis weight 55~75g / m², thickness 45~75μm) is embossed by an anilox roller (anilox depth of 0.1mm), pre-cut by a blade (blade sharpness Ra0.8μm), and then passed through the unit's storage rack (capacitating up to 6 sheets). The roll is automatically fed to the reciprocating sleeve, where it contacts the tobacco pack; the sleeve mechanism's folding device rapidly rotates at a 45° angle, folding the aluminum foil into a "..." shape. "type( Figure 5 The first step is to ensure that the aluminum foil folding angle error is ≤1°, adapt to the wrapping requirements of double aluminum packs, and then wrap the cigarette packs before entering the folding guide rail area.

[0047] Next is the precise folding action of the relevant rail components within the folding channel: the middle folding rail component and the side folding rail component are rigidly fixed with M3×8mm screws through the M3 screw holes added to the positioning reference plate, so that the spacing error of the inner and outer folding rail components is ≤0.02mm, ensuring the stable conveying of the inner lining paper (static friction coefficient ≤0.25, dynamic friction coefficient 0.16~0.28). After the tobacco group carries the aluminum foil paper into the guide rail, the corner folders on both sides of the rail component rotate at an angular velocity of 10° / ms, first folding the two corners of the aluminum foil paper to fit against the side of the tobacco group ( Figure 5 The second step is to ensure that the angle error is ≤0.2mm; subsequently, the tobacco assembly advances along the X direction at a speed of 50mm / s, and the long side folding mechanism of the guide rail (the distance between the upper and lower pressure rollers is 18mm, matching the thickness of the double aluminum-coated tobacco assembly) sequentially completes the folding of the lower long side → upper long side. Figure 5The third step involves folding the long side so that its parallelism with the end face of the cigarette pack is ≤0.05mm, forming a preliminary double aluminum foil cigarette pack. During this process, ZB418 inherits the stable operating characteristics of ZB48, effectively avoiding the problems of "rotten ends" and "reverse wrapping" of the inner lining paper.

[0048] Next comes the final folding action of the reciprocating mold box: after the initial aluminum foil cigarette pack enters the mold box, the corner folder of the mold box flips twice at an angular velocity of 8° / ms, first folding the two side corners to align with the edges of the cigarette pack (folding angle deviation ≤0.1mm); then the upper and lower short side folding mechanism of the mold box (pressing block stroke 10mm, pressure 20N) completes the folding of the lower short side → upper short side (the perpendicularity of the short side after folding to the long side of the cigarette pack ≤0.05mm), finally forming a complete double aluminum foil cigarette pack. During the folding process, the aluminum foil paper forming degree is controlled at ≤25° (no embossing process), which meets the packaging quality requirements of the ZB418 unit.

[0049] Throughout the process, the countersunk holes in the folding channel cover screws allow the M3 screw heads to be recessed by 3mm + 0.05mm, with a flatness error of ≤0.02mm with the cover surface. When the cigarette packs are conveyed along the X direction (with a conveying speed adapted to the unit's 800 packs / minute capacity), the screw heads do not protrude or interfere. Combined with the ZB418's automated material conveying system, material conveying smoothness is improved by 30%. Operators can quickly verify the component installation accuracy through markings, ensuring the positioning stability of the entire device. Ultimately, the offset of the inner liner paper conveying is controlled within 0.03mm, the number of cigarette packs rejected due to unstable conveying is reduced by more than 85%, and the unit's effective operating rate remains ≥85%, fully meeting the production acceptance requirements of the ZB418 double-aluminum packaging unit.

[0050] The apparatus and methods disclosed in the embodiments are described simply because they correspond to the methods disclosed in the embodiments. For relevant details, please refer to the method section.

[0051] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A cigarette aluminum foil packaging forming mechanism for reducing the offset of the inner liner paper conveying, characterized in that, include: Positioning reference plate (1), the positioning reference plate (1) is used to connect the machine base of the double aluminum packaging unit and to serve as the bearing base of the folding rail; The intermediate folding rail (2) is detachably connected to the middle part of the positioning reference plate (1); Side folding rail (3), there are two sets of side folding rail (3) and they are detachably connected to the two sides of the positioning reference plate (1). The two sets of side folding rail (3) are symmetrically arranged relative to the middle folding rail (2). The two sets of side folding rail (3) and the middle folding rail (2) form a double channel for aluminum foil folding. The positioning reference plate (1) is provided with a module positioning groove at the end of the aluminum foil folding channel (4). The positioning reference plate (1) is provided with a customized positioning structure between the middle folding rail (2) and the side folding rail (3) respectively, and the uniformity and linearity of the double channel forming are ensured based on the positioning structure. Adjustment module (5), which is detached and connected to the module positioning slot and used to standardize the spacing of the folding channel.

2. The cigarette aluminum foil packaging forming mechanism for reducing the conveying offset of the inner liner paper according to claim 1, characterized in that, It also includes reinforcing plates (6), which are multiple pieces. The middle folding rail (2) has outwardly extending suspended rail sections on both sides. The side folding rail (3) has a suspended rail section on the side close to the middle folding rail (2). The multiple reinforcing plates (6) are respectively fixedly connected to the suspended rail sections corresponding to the middle folding rail (2) and the side folding rail (3), thereby improving the rigidity of the suspended rail sections.

3. The cigarette aluminum foil packaging forming mechanism for reducing the conveying offset of the inner liner paper according to claim 1, characterized in that, The adjustment module (5) includes an aluminum foil folding channel adjustment module (51) and a reciprocating mold box adjustment module (52). The bottom side of the aluminum foil folding channel adjustment module (51) is provided with a rib (511). The rib (511) can be embedded and positioned in the module positioning groove. The width of the aluminum foil folding channel adjustment module (51) provides a reference for the spacing between the side folding rail (3) and the middle folding rail (2) forming the folding channel. The reciprocating mold box adjustment module (52) is used to adjust the spacing between the inner and outer mold boxes of the dual-channel reciprocating mold box (8).

4. The cigarette aluminum foil packaging forming mechanism for reducing the conveying offset of the inner liner paper according to claim 3, characterized in that, The width of the rib (511) is 8mm, and the fit gap between the rib (511) and the module positioning groove is 0.02mm; the reciprocating mold box adjustment module (52) has a small end (521) and a large end (522), and the reciprocating mold box adjustment module (52) has protrusions on both sides corresponding to the large end (522). The width of the small end of the reciprocating mold box adjustment module (52) is 5mm, and the interference of the small end of the reciprocating mold box adjustment module (52) with the reciprocating mold box (8) is 0.01mm, ensuring the positioning accuracy of the inner and outer mold boxes of the reciprocating mold box is ±0.01mm.

5. A cigarette aluminum foil packaging forming mechanism for reducing the conveying offset of the inner liner paper according to claim 3, characterized in that, It also includes an identification structure (53), which is disposed on the aluminum foil folding channel adjustment module (51) and the reciprocating mold box adjustment module (52) and is used to assist the operator in determining the installation accuracy of the aluminum foil folding channel adjustment module (51) and the reciprocating mold box adjustment module (52).

6. The cigarette aluminum foil packaging forming mechanism for reducing the conveying offset of the inner liner paper according to claim 1, characterized in that, It also includes a folding channel cover plate (7), which is fixedly installed on the upper side of the middle folding rail (2) and the side folding rail (3). An auxiliary positioning baffle is provided between the folding channel cover plate (7) and the middle folding rail (2) and the side folding rail (3). The auxiliary positioning baffle can limit and block the edge of the inner lining paper to prevent the inner lining paper from deviating during the folding process.

7. A cigarette aluminum foil packaging forming mechanism for reducing the conveying offset of the inner liner paper according to claim 6, characterized in that, The folding channel cover plate (7) has multiple countersunk screw holes near its two ends. The multiple countersunk screw holes at both ends are symmetrically distributed relative to the middle folding rail. The countersunk screw holes are connected to the auxiliary positioning baffle by connecting screws. The depth of the countersunk screw holes is 3mm + 0.05mm. Screws are installed in the countersunk screw holes and the screw heads are embedded in the countersunk screw holes.

8. A cigarette aluminum foil packaging forming mechanism for reducing the conveying offset of the inner liner paper according to claim 1, characterized in that, The positioning structure is an M3 screw. The positioning reference plate (1) has multiple M3 screw holes symmetrically opened on both sides of the center line of the aluminum foil folding channel. The middle folding rail (2) and the side folding rail (3) are provided with multiple mating holes. The M3 screw holes and the mating holes have the same diameter and the coaxiality error is less than 0.02mm. The M3 screw is used to connect the coaxially arranged M3 screw holes and the mating holes and improve the installation accuracy of the middle folding rail (2), the side folding rail (3) and the positioning reference plate (1).

9. A cigarette aluminum foil packaging forming mechanism for reducing the conveying offset of the inner liner paper according to claim 8, characterized in that, The multiple mating holes of the middle folding rail (2) and the side folding rail (3) are arranged symmetrically parallel to the direction of the folding channel. The hole spacing of the multiple mating holes on the middle folding rail (2) and the side folding rail (3) is 15mm. The hole spacing error between the middle folding rail (2) and the multiple M3 screw holes corresponding to the positioning reference plate (1) is less than 0.02mm. The hole spacing error between the multiple mating holes of the side folding rail (3) and the multiple M3 screw holes corresponding to the positioning reference plate (1) is less than 0.02mm. The M3 screw holes and mating holes are machined by a CNC drilling machine with a positioning accuracy of ±0.01mm. The hole spacing accuracy is controlled in real time by the XY axis grating ruler of the drilling machine, and the hole depth is precisely controlled by the Z axis depth limiter.

10. A positioning optimization method based on the aluminum foil packaging forming mechanism as described in any one of claims 1-9, characterized in that, Includes the following steps: S1: The positioning reference plate, folding rail and folding channel cover plate are machined with screw holes and countersunk holes using a CNC drilling machine with a positioning accuracy of ±0.01mm. The feed speed of the M3 screw hole drill bit of the positioning reference plate is 0.1mm / revolution. The hole spacing and hole depth accuracy are controlled by the XY axis grating ruler and the Z axis depth limiter of the drilling machine, respectively. S2: The reinforced plate and the machined folding rail are joined at 3N... The torque m is used to tighten and fix the assembly using a torque wrench; S3: Position the aluminum foil paper folding channel adjustment module by vertically inserting it into the module positioning slot, and position the reciprocating mold box adjustment module by inserting it into the limiting slot of the reciprocating mold box along the folding channel conveying direction. Combined with the multiple high-precision screw holes arranged along the folding channel direction on the positioning reference plate, a dual positioning adjustment is formed. S4: During the conveying of the tobacco pack products along the folding and forming direction, the aluminum foil paper is precisely folded by relying on the dual positioning adjustment of S3, so that the conveying deviation of the inner lining paper is ≤0.03mm, and the amount of tobacco packs rejected due to unstable conveying is reduced by more than 85%.

Images