Laminating wheel set, tissue laminating device and laminating method

Abstract

The invention discloses a laminating wheel set, a tissue laminating device and a laminating method, and belongs to the technical field of tissue processing. The laminating wheel set is used for the tissue laminating device and comprises a plurality of laminating wheels which are arranged side by side at intervals, and each laminating wheel comprises a fixing base used for being installed on a fixing mechanism of the tissue laminating device; the base is pivotally connected to the fixed seat through a pivoting connecting piece; the embossing line wheel is mounted on the base and is used for being matched with a bottom roller of the tissue laminating device and embossing a laminating line on the tissue; the matching part is positioned between the fixed seat and the base and is used for being matched with an integral adjusting mechanism of the tissue laminating device so as to integrally adjust the positions of the plurality of embossing line wheels; and the fine adjustment mechanism is arranged on the base and used for driving the base to rotate relative to the fixed seat so as to independently adjust the position of each impressing line wheel. Compared with the prior art, the gap between each impressing line wheel and the bottom roller can be accurately controlled and kept consistent.

Description

Technical Field

[0001] This invention relates to the field of tissue paper processing technology, and in particular to a laminating wheel assembly, a tissue paper laminating device, and a laminating method. Background Technology

[0002] In the field of household paper processing, to achieve better strength and user experience, common multi-layered paper products such as facial tissues and handkerchiefs are usually made of two or more layers of paper base. In the manufacturing process of such products, to prevent the layers of paper base from separating during use, a lamination process is required before the laminated paper web enters subsequent processes such as folding. This involves physically pressing at predetermined positions on the paper web to form lamination lines, thus bonding the layers of paper base together in the pressing area.

[0003] Currently, the devices for achieving the above-mentioned lamination process mainly fall into two mainstream structures. The first type uses a pair of pressure rollers and a bottom roller, with raised embossed patterns on the surface of the pressure rollers. When the paper web passes through the pressing gap between the pressure rollers and the bottom roller, lamination lines corresponding to the patterns are imprinted on the paper web under pressure. Although this structure is simple and reliable, the spacing of the lamination lines is fixed by the position of the patterns on the pressure rollers, making it difficult to adapt to the rapid production changeover requirements of products of different sizes and specifications. The second type of tissue paper lamination device uses multiple independent imprinting rollers (or lamination rollers) working in conjunction with a common bottom roller. Each imprinting roller can be installed and adjusted independently, allowing for flexible setting of the lamination line spacing according to product specifications, while reducing the manufacturing and maintenance costs of individual rollers. However, this structure has inherent technical defects: the radial running stability of multiple independently installed and high-speed rotating imprinting rollers is difficult to guarantee, and they are prone to jumping; more importantly, it is difficult to achieve uniform control of the pressure applied to the bottom roller by each imprinting roller. This directly leads to uneven depth of lamination lines printed by different printing rollers. Even the same printing roller may produce lamination lines of varying depths due to vibration or pressure fluctuations, which seriously affects the consistency of product quality and aesthetics.

[0004] To address the aforementioned issues of uneven pressure and wear across multiple rollers, existing technologies have attempted several improvements. For example, Chinese invention patent CN103692701B discloses a solution that uses a smooth-surfaced laminating roller in conjunction with a bottom roller having an axially extending patterned surface. By adjusting their relative axial positions, the unworn area of ​​the bottom roller is utilized, aiming to extend its service life. However, this solution still has significant shortcomings: First, the multiple laminating rollers are typically mounted on the same fixed frame, allowing only overall synchronous axial position adjustments, rather than independent and precise fine-tuning of the gap between each laminating roller and the bottom roller, thus failing to fundamentally guarantee the consistency of pressure across all rollers. Second, the adjustment of the laminating rollers and bottom roller relies on manual or simple mechanical displacement, which is prone to deviations due to human error or equipment vibration during commissioning or operation, leading to uncontrolled lamination line spacing. Furthermore, this solution does not solve the fundamental problem of the laminating roller assembly easily jumping during operation due to a lack of effective buffering. In addition, when the patterned surface of the bottom roller shows extensive or multi-point wear, it still faces the disadvantages of high cost and long cycle for overall repair or replacement. Summary of the Invention

[0005] To solve the above-mentioned technical problems, the present invention provides a laminating roller assembly, a tissue paper laminating device and a laminating method, which can achieve uniform control of multiple embossing rollers and allow independent and precise gap fine adjustment of each embossing roller.

[0006] The technical solution of this invention is:

[0007] This invention provides a laminating wheel assembly for a tissue paper laminating device, comprising a plurality of laminating wheels arranged side-by-side and spaced apart, each of the laminating wheels comprising:

[0008] A mounting base is used for mounting on the fixing mechanism of the tissue paper laminating device;

[0009] The base is pivotally connected to the fixed base via a pivoting connector;

[0010] An embossing roller, mounted on the base, is used to cooperate with the bottom roller of the tissue paper laminating device to emboss laminating lines on the tissue paper;

[0011] The mating part, located between the fixed base and the base, is used to cooperate with the overall adjustment mechanism of the tissue paper laminating device to adjust the position of multiple printing rollers as a whole;

[0012] A micro-adjustment mechanism, disposed on the base, is used to drive the base to rotate relative to the fixed seat in order to independently adjust the position of each of the embossing rollers.

[0013] Furthermore, the micro-adjustment mechanism includes a fixed block and a micro-adjustment bolt. The fixed block is disposed on the base and has an adjustment hole. The micro-adjustment bolt passes through the adjustment hole and is threaded to the fixed seat. The fixed block drives the base to rotate relative to the fixed seat.

[0014] Furthermore, the fine-tuning bolt includes a screw, a nut, and an elastic element. One end of the screw extends into the fixed seat and is threaded into the fixed seat. The nut is disposed at the other end of the screw. The elastic element is sleeved on the screw. The fine-tuning bolt is fixed to the fixed block by a nut. The rotation angle of the base relative to the fixed seat is controlled by screwing the nut in or out.

[0015] Furthermore, the pivoting connector is a pin or a hinge shaft, and the lower part of the fixed seat and the upper part of the base are respectively provided with shaft holes.

[0016] Furthermore, the mating part is a groove formed at the connection between the fixing seat and the base, including a fixing surface formed on the fixing seat facing the base and a force-bearing surface formed on the side of the base away from the embossing wheel.

[0017] Furthermore, the end of the fixed base is provided with a baffle extending toward the mating part, the baffle being used to confine the overall adjustment mechanism within the groove.

[0018] Furthermore, the fixing seat includes a mounting part and a locking member. The mounting part is configured as a mounting groove, a claw, or a protrusion that can cooperate with the fixing mechanism. The locking member is used to lock the mounting part onto the fixing mechanism.

[0019] Furthermore, the roller surface of the embossing roller is provided with a radially extending basic protrusion, and the surface of the basic protrusion is provided with raised texture for embossing the lamination lines.

[0020] Furthermore, two basic protrusions are provided axially spaced on the roller surface of the embossing roller, and each basic protrusion is provided with the raised texture.

[0021] Furthermore, it also includes a lubrication component mounted on the base and inclined toward the embossing roller, the lubrication component being used to provide lubricant to the embossing roller.

[0022] The present invention also provides a tissue paper laminating device, comprising:

[0023] Fixed structures, including frames;

[0024] The pressing mechanism includes a bottom roller rotatably mounted on the frame and a laminating wheel assembly as described in any one of claims 1 to 10, wherein the laminating wheel assembly is mounted on the frame and the printing line wheel is disposed opposite to the bottom roller, forming a pressing gap between the roller and the bottom roller for the paper towel to pass through.

[0025] An overall adjustment mechanism, mounted on the frame, includes a drive unit that acts on the mating part, the drive unit being used to drive all the printing line wheels to move synchronously.

[0026] Furthermore, the overall adjustment mechanism is an airbag, which is arranged parallel to the arrangement direction of the laminated wheel assembly. After inflation, its surface contacts the mating parts of all the laminated wheels.

[0027] Furthermore, it also includes a crossbeam disposed on the frame and a guide rail fixed to the crossbeam, with the mounting base of the laminated wheel assembly mounted on the guide rail.

[0028] The present invention further provides a paper towel lamination method, applied to the above-mentioned paper towel lamination apparatus, comprising the following steps:

[0029] Control the overall adjustment mechanism so that it acts simultaneously on the mating parts of all laminating rollers, driving all the printing line rollers to move toward the bottom roller as a whole, so as to adjust the initial gap between each printing line roller and the bottom roller as a whole;

[0030] The bottom roller is driven to rotate and the paper towel is guided through the initial gap between the printing line wheel and the bottom roller to form a preliminary lamination line on the paper towel;

[0031] Based on the depth and / or continuity of the preliminary lamination lines, the gap between each of the imprint line rollers and the bottom roller is independently adjusted and locked by micro-adjustment mechanisms respectively provided on the lamination rollers;

[0032] Continue the lamination process to form stable and consistent lamination lines on the paper towel.

[0033] Furthermore, it also includes the following steps:

[0034] The multi-layer paper base is fed between the printing line roller and the bottom roller. The multi-layer paper base is pre-pressed and stabilized by the surface contact through the basic protrusions, and the lamination line is formed by the convex texture on the basic protrusions in the line contact manner.

[0035] After the paper base is folded and cut, it is cut along the middle position of the two lamination lines formed by the raised textures of the two basic protrusions of the same embossing wheel to obtain a single sheet of tissue paper.

[0036] The beneficial technical effects of this invention are:

[0037] This invention constructs a dual-layer adjustment system by pivoting the fixing seat and base of the laminating roller, allowing the base to drive the imprinting roller to rotate to a certain extent. A mating part and a micro-adjustment mechanism are incorporated into the laminating roller. The overall adjustment mechanism, through the mating part, can quickly and synchronously perform uniform coarse adjustments to the position of all imprinting rollers, establishing an initial benchmark for uniform pressing with extremely high efficiency. Furthermore, the independent micro-adjustment mechanism for each laminating roller allows for fine compensatory adjustments, resolving individual differences caused by processing, assembly, or wear in multi-roller systems. This ensures that the final working clearance height between all imprinting rollers and the bottom roller is consistent, fundamentally guaranteeing the consistency of the lamination line depth and significantly improving product quality.

[0038] Meanwhile, each laminating wheel can be independently and quickly installed or removed from the support rail via its mounting base. When a component wears out, only the single laminating wheel module needs to be replaced, without having to replace the entire wheel set or bottom roller. Maintenance is simple and quick, effectively reducing maintenance costs and downtime. Attached Figure Description

[0039] Figure 1 This is a partial structural schematic diagram of the tissue paper laminating device according to a preferred embodiment of the present invention;

[0040] Figure 2 yes Figure 1 Schematic diagram of the middle layer wheel assembly;

[0041] Figure 3 yes Figure 2 Schematic diagram of the cross-sectional structure of the middle layer wheel assembly;

[0042] Figure 4 yes Figure 2 A three-dimensional structural diagram of the medium-pressure printing roller.

[0043] Explanation of reference numerals in the attached figures:

[0044] 100-Tissue paper laminating device; 10-Fixing mechanism; 11-Frame; 12-Crossbeam; 121-Crossbeam fixing seat; 122-Guide rail; 20-Pressing mechanism; 21-Bottom roller; 22-Laminating roller assembly; 220-Laminating roller; 221-Fixing seat; 2211-Mounting part; 222-Base; 2221-Pivoting connector; 2222-Force-bearing surface; 223-Imprinting line roller; 2231-Roller Surface, 2232-basic protrusion, 2233-roughness, 2234-bearing, 224-fitting part, 225-micro-adjustment mechanism, 2250-micro-adjustment bolt, 2251-nut, 2252-screw, 2253-nut, 2254-elastic element, 226-fixing block, 227-baffle, 228-lubricating component, 229-locking component; 30-integral adjustment mechanism, 31-airbag. Detailed Implementation

[0045] In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, the specific embodiments of the present invention will be described in further detail below with reference to specific examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0046] Please see Figures 1 to 4 As shown, the present invention provides a tissue paper laminating device 100 for laminating and printing tissue paper, which can form uniform and clear lamination lines on the paper strip and effectively prevent the tissue paper layers from separating.

[0047] The tissue paper laminating device 100 includes a fixing mechanism 10, a pressing mechanism 20, and an adjusting mechanism 30. The fixing mechanism 10 provides a stable mounting reference and precise positioning for the entire tissue paper laminating device 100. The pressing mechanism 20 is responsible for physically pressing the tissue paper together to form lamination lines. The adjusting mechanism 30 is used to achieve precise and efficient control of the laminating rollers 220.

[0048] The fixing mechanism 10 includes left and right frames 11 and a crossbeam 12 mounted on top of the frames. The frames 11 are rigid frames welded from high-strength steel and serve as the basic load-bearing structure of the entire device. The crossbeam 12 is horizontally and securely mounted on the upper part of the frames 11 via crossbeam fixing seats 121 at both ends. The crossbeam 12 uses large-section rectangular steel tubing to achieve extremely high bending and torsional stiffness, preventing deformation and deflection from affecting the operation of the laminated wheel assembly 22.

[0049] A guide rail 122, installed along its length, is provided on the lower surface of the crossbeam 12 on the side facing the working area. The guide rail 122 provides a uniform, high-precision longitudinal mounting and sliding reference for all subsequent laminating wheel modules. In this embodiment, the guide rail 122 is detachably fixed to the crossbeam 12 by bolts. Specifically, the crossbeam 12 has pre-drilled mounting holes, and the two can be fixedly connected by passing bolts through the guide rail 122 and locking them into the mounting holes.

[0050] The pressing mechanism 20 includes a bottom roller 21 and a laminating wheel assembly 22 corresponding to the bottom roller 21.

[0051] The bottom roller 21 serves as the pressure bearing reference for pressing. It is rotatably supported on the frame 11 by bearing seats at both ends and is driven by a drive motor (not shown in the figure) to rotate at a preset linear speed. That is, the bottom roller 21 is rotatably mounted on the frame 11.

[0052] The laminating roller assembly 22 is mounted on the frame 11, and the printing roller 223 on it is arranged opposite to the bottom roller 21, forming a pressing gap between them for the paper towel to pass through.

[0053] The laminating roller assembly 22 includes multiple laminating rollers 220 arranged in parallel and spaced apart. All laminating rollers 220 are suspended and fixed on the guide rail 122 by their own mounting structure, and their working ends (pressing rollers) face the bottom roller 21, together maintaining a small, adjustable gap with the surface of the bottom roller 21, forming a pressing channel through which the paper towel passes.

[0054] Please see Figure 2 and Figure 3 As shown, each laminating wheel 220 is an independent unit integrating installation, adjustment, imprinting, and buffering functions. Each laminating wheel 220 includes a fixing base 221, a base 222, an imprinting roller 223, a mating part 224, and a micro-adjustment mechanism 225.

[0055] The mounting base 221 is used to fix the laminating wheel 220 to the crossbeam 12. The mounting base 221 includes a mounting part 2211 and a locking member 229.

[0056] The mounting portion 2211 is configured as a mounting groove, claw, or protrusion that can cooperate with the fixing mechanism 10. In this embodiment, the mounting portion 2211 is a mounting groove provided on the top of the fixing base 221. The size of the mounting groove is precisely matched with the cross-section of the guide rail 122, so that the entire laminating wheel 220 can be conveniently hung on the guide rail 122 like a "hook" and can slide easily along the guide rail to adjust its position in the width direction of the paper towel.

[0057] The locking element 229 is used to lock the mounting part 2211 onto the fixing mechanism 10, and includes threaded bolts located directly above the mounting groove and on one side (usually the rear side). After the laminating wheel 220 is positioned, tightening the upper threaded bolt will press the upper surface of the guide rail 122 downward, and tightening the side threaded bolt will push the side of the guide rail 122 forward. The fixing seat 221 is firmly locked by the two-point locking method to prevent shaking.

[0058] The base 222 is pivotally connected to the fixed base 221 via a pivot connector 2221.

[0059] Furthermore, the pivot connector 2221 is a pin or a hinge shaft, and the lower part of the fixed seat 221 and the upper part of the base 222 are respectively provided with shaft holes.

[0060] In this embodiment, the pivot connector 2221 is a pin that passes through the first shaft hole of the fixed seat 221 and the second shaft hole of the base 222, pivotally connecting the two. This allows the base 222 to rotate precisely about the axis of the pin relative to the fixed seat 221. This arrangement provides a basis for adjusting the gap between the laminating roller 220 and the bottom roller 21.

[0061] Please see Figure 4As shown, the embossing roller 223 is mounted on the lower end of the base 222 via a precision bearing 2234, and is used to cooperate with the bottom roller 21 of the tissue paper laminating device 100 to emboss laminating lines on the tissue paper.

[0062] The roller surface 2231 of the printing roller 223 has narrow, radially protruding base protrusions 2232. On the top surface (working surface) of each base protrusion 2232, a specific micro-pattern, namely raised texture 2233 (such as a dot matrix or fine lines), is formed through an engraving process. This two-tiered structure of "base protrusion + raised texture" allows the base protrusions 2232 and raised texture 2233 to act simultaneously on the tissue paper during the pressing process, achieving a combined effect of contact and printing: the base protrusions 2232 pre-press and stabilize the multi-layer tissue paper through surface contact, while the raised texture 2233 on them performs fine printing through line contact, thus forming clear and strong lamination lines. This structure is particularly beneficial for improving the lamination effect and quality consistency of multi-layer tissue paper, thicker tissue paper, or single-layer thinner tissue paper.

[0063] In this embodiment, two basic protrusions 2232 are axially spaced on the roller surface 2231 of the embossing roller 223. Each of the two basic protrusions 2232 is engraved with raised lines 2233. After the tissue paper forms lamination lines through the tissue paper laminating device 100, it undergoes folding, cutting, and packaging to obtain individually packaged tissue paper products convenient for consumers. Each tissue paper has two lamination lines, originating from adjacent raised lines 2233 on two adjacent laminating rollers 220. That is, during cutting, the cut is made along the middle of the two lamination lines formed by the two raised lines 2233 on the same embossing roller 223. This arrangement ensures that the distance from the lamination line to the edge of each tissue paper is equal, guaranteeing consistent quality and improving product refinement.

[0064] The laminating wheel 220 also includes a lubrication component 228 mounted on the base 222 and inclined toward the printing thread wheel 223. The oil outlet of the lubrication component 228 points toward the bearing 2234 or side edge of the printing thread wheel 223 and is used to provide lubricant to the printing thread wheel 223 to reduce wear, prevent paper dust adhesion, and extend the life of the core component.

[0065] The overall adjustment mechanism 30 is mounted on the frame 11 and includes a drive unit that acts on the mating part 224. The drive unit is used to drive all the embossing rollers 223 to move synchronously.

[0066] Furthermore, the overall adjustment mechanism 30 is an airbag 31, which is arranged parallel to the arrangement direction of the laminated wheel assembly 22, and its two ends are fixed to the frame 11 by special mounting brackets. The airbag 31 is connected to an external air source and pressure control unit (not shown) through pipelines, and its volume and applied pressure can be changed by inflating and deflating. After inflation, its surface contacts the mating parts 224 of all the laminated wheels 220, so as to achieve precise and efficient control of the laminated wheel assembly 22.

[0067] The mating part 224 is located between the fixed base 221 and the base 222, and is used to cooperate with the overall adjustment mechanism 30 of the tissue paper laminating device 100 to adjust the position of the multiple printing rollers 223 as a whole.

[0068] Furthermore, the mating part 224 is a groove formed at the connection between the fixed seat 221 and the base 222. This groove is specifically used to accommodate the drive part (such as the airbag 31) of the overall adjustment mechanism 30. The side of the fixed seat 221 facing the base 222 is a flat fixing surface, and the side of the base 222 away from the embossing wheel 223 is a smooth force-bearing surface, ensuring that the force is evenly transmitted when the airbag 31 contacts the force-bearing surface.

[0069] Furthermore, the end of the fixed base 221 is provided with a baffle 227 extending toward the mating part 224. The baffle 227 is used to confine the overall adjustment mechanism 30 within the groove, preventing the airbag 31 from coming out of the front side of the groove during long-term operation, and ensuring the continuity and reliability of force transmission.

[0070] A micro-adjustment mechanism 225 is disposed on the base 222 and is used to drive the base 222 to rotate relative to the fixed base 221 so as to independently adjust the position of each of the embossing rollers 223.

[0071] Furthermore, the micro-adjustment mechanism 225 includes a fixing block 226 and a micro-adjustment bolt 2250.

[0072] The fixing block 226 is disposed on the base 222 and has a through adjustment hole. The fine-tuning bolt 2250 passes through the adjustment hole on the fixing block 226 and is threaded to the fixing seat 221, and drives the base 222 to rotate relative to the fixing seat 221 through the fixing block 226.

[0073] Furthermore, the fine-tuning bolt 2250 includes a screw 2252, a nut 2251, an elastic element 2254, and a nut 2253.

[0074] Specifically, such as Figure 3As shown, in order to achieve fine adjustment of the distance between the embossing roller 223 and the bottom roller 21, the fine adjustment bolt 2250 is set as a fine thread bolt. The fine adjustment bolt 2250 passes through the adjustment hole, and one end of its screw 2252 extends into the fixed seat 221 and is threaded with the fixed seat 221. The other end of the screw 2252 is provided with a nut 2251, and a spring 2254 is sleeved inside the middle section. The fine adjustment bolt 2250 is locked and positioned on the fixed block 226 by the nut 2253.

[0075] When the nut 2251 is screwed in towards the fixed base 221, the screw 2252 is screwed into the fixed base 221. Since the nut 2253 locks the fine-tuning bolt 2250 onto the fixed block 226, the screwing motion of the screw 2252 drives the fixed block 226 to move closer to the fixed base 221 through the nut 2253. This, in turn, drives the base 222, which is fixedly connected to it, to rotate slightly around the pin 2221, so that the embossing roller 223 moves closer to the bottom roller 21, thereby reducing the gap between the two and making it easier to form clearer lamination lines on the paper towel. Conversely, when the screw nut 2251 is turned away from the fixed seat 221, the screw 2252 is turned out relative to the fixed seat 221, and the traction force of the nut 2253 on the fixed block 226 is weakened or disappears. Under its own weight and external load, the fixed block 226 drives the base 222 to rotate slightly around the pin 2221, which ultimately increases the distance between the embossing roller 223 and the bottom roller 21. This prevents the paper towel from being crushed due to too small a gap, or wrinkles from appearing at the lamination line, affecting the appearance. For the lamination roller group 22 formed by multiple lamination rollers 220, the fine-tuning bolt 2250 is also helpful in controlling the gap between the multiple lamination rollers 220 and the bottom roller 21, so that the gap between each lamination roller 220 and the bottom roller 21 is as consistent as possible, which is conducive to forming a uniform lamination line embossing on the paper towel.

[0076] The present invention further provides a paper towel lamination method, applied to the above-mentioned paper towel lamination apparatus 100, comprising the following steps:

[0077] S1: According to the product specifications (paper towel width, number of lamination lines and spacing), the required number of lamination wheels 220 are mounted on the guide rail 122 through the mounting slots of their fixing seats 221, and each wheel is slid to the approximate preset position. The locking parts 229 are then initially tightened to complete the physical layout.

[0078] S2: Control the overall adjustment mechanism 30 so that it acts simultaneously on the mating parts 224 of all laminating rollers 220, driving all embossing rollers 223 to move toward the bottom roller 21 as a whole, and adjusting the initial gap between the multiple embossing rollers 223 and the bottom roller 21 as a whole.

[0079] Specifically, the air source is activated, and compressed air is injected into the air bladder 31 of the overall adjustment mechanism 30. The air bladder 31 expands uniformly, and its surface simultaneously presses against the force-bearing surfaces 2222 of all the laminating rollers 220 bases 222. This thrust drives all the bases 222 to rotate synchronously around their respective pins 2221, thereby causing the entire row of embossing rollers 223 to move towards the bottom roller 21 as a whole, quickly and once setting a uniform initial reference gap. The flexibility of the air bladder ensures automatic equalization of pressure distribution and provides initial buffering.

[0080] S3: Drive the bottom roller 21 to rotate and guide the paper towel through the gap between the printing line wheel 223 and the bottom roller 21 to form a preliminary lamination line on the paper towel.

[0081] The multi-layer paper base is conveyed between the printing roller 223 and the bottom roller 21. The paper base is pre-pressed by the base protrusion 2232 of the printing roller 223 to stabilize the interlayer relationship and prevent misalignment between layers. At the same time, clear lamination lines are printed by the embossing 2233.

[0082] S4: Based on the depth and / or continuity of the initial lamination lines, the gap between each of the embossing line rollers 223 and the bottom roller 21 is independently adjusted (e.g., by independently turning the nut 2251 of the fine-tuning bolt 2250 of each lamination roller 220 for fine compensation adjustment) and locked by the micro-adjustment mechanism 225 of each lamination roller 220.

[0083] S5: After adjustment, continue the lamination process to form stable and consistent lamination lines on the paper towel.

[0084] S6: After folding the pressed paper base, cut it along the midpoint of the two lamination lines formed by the raised lines 2233 of the two basic protrusions 2232 of the same embossing roller 223, to obtain a single tissue product. The pressed continuous paper web is then folded and sent to the precision cutting unit. The cutting blade is precisely aligned with the midpoint of the two parallel lamination lines generated by the same embossing roller 223 for cutting. Each individual tissue obtained in this way has strictly equal distances from its two edges to its respective lamination line, resulting in a product with high symmetry and an exquisite appearance.

[0085] In summary, this invention constructs a dual-layer adjustment system by pivotally connecting the fixing seat 221 and the base 222 of the laminating wheel 220, allowing the base 222 to drive the imprinting roller 223 to rotate to a certain extent. Furthermore, by incorporating a mating part 224 and a micro-adjustment mechanism 225 on the laminating wheel 220, a double-layer adjustment system is established. The overall adjustment mechanism 30, through the mating part 224, can quickly and synchronously perform uniform coarse adjustments to the position of all imprinting rollers 223, establishing an initial benchmark for uniform pressing with extremely high efficiency. Based on this, the independent micro-adjustment mechanism 225 for each laminating wheel 220 allows for fine compensatory adjustments, resolving individual differences caused by processing, assembly, or wear in multi-wheel systems. This ensures that the final working clearance height between all imprinting rollers 223 and the bottom roller 21 is consistent, ultimately ensuring the consistency of the lamination line depth and significantly improving product quality. Additionally, each laminating wheel 220 can be independently and quickly installed or removed from the guide rail 122 via its fixing seat 221. When a component such as an embossing roller 223 wears out, it is not necessary to replace the entire roller assembly or the bulky bottom roller 21; only the single laminating roller 220 needs to be replaced, making the operation simple, quick, and cost-effective. Furthermore, by setting narrow foundation protrusions 2232 on the roller surface 2231 of the embossing roller 223, pre-lamination of multi-layer tissues is achieved, stabilizing the interlayer relationship, preventing paper base drift and wrinkling, and making lamination more favorable for multi-layer tissues and / or thicker tissues, and / or single-layer thinner tissues. This invention, by setting two sets of raised lines 2233 on the same embossing roller 223, and ensuring that the lamination line formed by these two sets of raised lines falls on two adjacent tissues, ensures that the distance from the lamination line to the edge of each tissue is equal, guaranteeing consistent quality and improving product refinement.

[0086] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A laminating wheel assembly for use in a tissue paper laminating device, characterized in that, The assembly includes a plurality of parallel and spaced-apart laminating wheels (220), each of the laminating wheels (220) comprising: A fixing base (221) is used for mounting on the fixing mechanism (10) of the paper towel laminating device (100); The base (222) is pivotally connected to the fixed seat (221) via a pivot connector (2221); An embossing roller (223) is mounted on the base (222) and is used to cooperate with the bottom roller (21) of the tissue paper laminating device (100) to emboss laminating lines on the tissue paper; The mating part (224) is located between the fixed base (221) and the base (222) and is used to cooperate with the overall adjustment mechanism (30) of the tissue paper laminating device (100) to adjust the position of the multiple printing rollers (223) as a whole; A micro-adjustment mechanism (225) is provided on the base (222) for driving the base (222) to rotate relative to the fixed seat (221) to independently adjust the position of each of the embossing rollers (223).

2. The laminated wheel assembly according to claim 1, characterized in that, The micro-adjustment mechanism (225) includes a fixing block (226) and a micro-adjustment bolt (2250). The fixing block (226) is located on the base (222) and has an adjustment hole. The micro-adjustment bolt (2250) passes through the adjustment hole and is threaded to the fixing seat (221). The fixing block (226) drives the base (222) to rotate relative to the fixing seat (221).

3. The laminated wheel assembly according to claim 2, characterized in that, The fine-tuning bolt (2250) includes a screw (2252), a nut (2251), and an elastic element (2254). One end of the screw (2252) extends into the fixed seat (221) and is threadedly engaged with the fixed seat (221). The nut (2251) is located at the other end of the screw (2252). The elastic element (2254) is sleeved on the screw (2252). The fine-tuning bolt (2250) is fixed to the fixed block (226) by a nut (2253). The rotation angle of the base (222) relative to the fixed seat (221) is controlled by screwing the nut (2251) in or out.

4. The laminated wheel assembly according to claim 1, characterized in that, The pivot connector (2221) is a pin or a hinge shaft, and the lower part of the fixed seat (221) and the upper part of the base (222) are respectively provided with shaft holes.

5. The laminated wheel assembly according to claim 1, characterized in that, The mating part (224) is a groove formed at the connection between the fixed seat (221) and the base (222), including a fixing surface formed on the fixed seat (221) facing the base (222) and a force-bearing surface (2222) formed on the side of the base (222) away from the embossing wheel (223).

6. The laminated wheel assembly according to claim 5, characterized in that, The end of the fixed base (221) is provided with a baffle (227) extending toward the mating part (224), the baffle (227) being used to confine the overall adjustment mechanism (30) within the groove.

7. The laminated wheel assembly according to claim 1, characterized in that, The mounting base (221) includes a mounting part (2211) and a locking member (229). The mounting part (2211) is configured as a mounting groove, claw, or protrusion that can cooperate with the fixing mechanism (10). The locking member (229) is used to lock the mounting part (2211) onto the fixing mechanism (10).

8. The laminated wheel assembly according to claim 1, characterized in that, The roller surface (2231) of the embossing roller (223) is provided with a radially extending base protrusion (2232), and the surface of the base protrusion (2232) is provided with raised textures (2233) for embossing layer lines.

9. The laminated wheel assembly according to claim 8, characterized in that, The roller surface (2231) of the embossing roller (223) is provided with two base protrusions (2232) spaced apart along the axial direction, and each base protrusion (2232) is provided with the raised texture (2233).

10. The laminated wheel assembly according to claim 1, characterized in that, It also includes a lubrication component (228) mounted on the base (222) and inclined toward the embossing roller (223), the lubrication component (228) being used to provide lubricant to the embossing roller (223).

11. A tissue paper laminating device, characterized in that, include: The fixing mechanism (10) includes the frame (11); The pressing mechanism (20) includes a bottom roller (21) rotatably mounted on the frame (11) and a laminating wheel assembly (22) as described in any one of claims 1 to 10. The laminating wheel assembly (22) is mounted on the frame (11), and the printing line wheel (223) is disposed opposite to the bottom roller (21), forming a pressing gap between the roller and the bottom roller (21) for the paper towel to pass through. An overall adjustment mechanism (30) is mounted on the frame (11) and includes a drive unit that acts on the mating part (224). The drive unit is used to drive all the embossing rollers (223) to move synchronously.

12. The tissue paper laminating device according to claim 11, characterized in that, The overall adjustment mechanism (30) is an airbag (31). The airbag (31) is arranged parallel to the arrangement direction of the laminated wheel group (22). After inflation, its surface contacts the mating part (224) of all the laminated wheels (220).

13. The tissue paper laminating device according to claim 11 or 12, characterized in that, It also includes a crossbeam (12) disposed on the frame (11) and a guide rail (122) fixed on the crossbeam (12), and the mounting base (221) of the laminated wheel assembly (22) is mounted on the guide rail (122).

14. A method for laminating tissue paper, applied to the tissue paper laminating apparatus as described in any one of claims 11 to 13, characterized in that, Includes the following steps: Control the overall adjustment mechanism (30) to act simultaneously on the mating parts (224) of all laminating rollers (220), drive all embossing rollers (223) to move toward the bottom roller (21) as a whole, and adjust the initial gap between each embossing roller (223) and the bottom roller (21) as a whole; Drive the bottom roller (21) to rotate and guide the paper towel through the initial gap between the printing line wheel (223) and the bottom roller (21) to form a preliminary lamination line on the paper towel; Based on the depth and / or continuity of the preliminary lamination lines, the gap between each of the embossing line rollers (223) and the bottom roller (21) is independently adjusted and locked by the micro-adjustment mechanism (225) respectively provided on the lamination roller (220); Continue the lamination process to form stable and consistent lamination lines on the paper towel.

15. The paper towel lamination method according to claim 14, characterized in that, It also includes the following steps: The multi-layer paper base is conveyed between the printing line roller (223) and the bottom roller (21). The multi-layer paper base is pre-pressed and stabilized by the surface contact through the base protrusion (2232), and the lamination line is formed by the ridge (2233) on the base protrusion (2232) in the line contact manner. After the paper base is folded and cut, it is cut at the middle position of the two lamination lines formed by the ridges (2233) of the two basic protrusions (2232) of the same embossing wheel (223) to obtain a single paper towel product.

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