A kind of offset composite printing paper and its production process

Abstract

The present invention relates to the technical field of toilet paper production, and particularly relates to a misaligned composite printed paper and its production process, which includes a surface layer part, a core layer part, and a bottom layer part distributed in sequence from top to bottom. It is characterized in that: the surface layer part includes surface layer convex parts and surface layer concave parts distributed in an array and staggered; the bottom layer part includes bottom layer convex parts and bottom layer concave parts distributed in an array and staggered, and the positions where the bottom layer convex parts and the bottom layer concave parts are located correspond to the positions where the surface layer convex parts and the surface layer concave parts are located; the core layer part includes core layer convex parts and core layer concave parts distributed in an array and staggered, the core layer convex parts are adapted to the surface layer convex parts, and the core layer concave parts are adapted to the bottom layer concave parts; the combination mode among the surface layer part, the core layer part, and the bottom layer part of the present invention not only forms a cavity structure, significantly improving the thickness and fluffiness of the toilet paper, but also enhancing the connection strength of the toilet paper due to the existence of the core layer part.

Description

Technical Field

[0001] The present invention relates to the technical field of toilet paper production, and particularly relates to a misaligned composite printed paper and its production process. Background Art

[0002] As a necessity in daily life, toilet paper has a large and stable market demand. With the improvement of people's living standards, the requirements for the quality and variety of toilet paper are also getting higher and higher. Generally, toilet paper is designed in a multi-layer stacked structure, and its surface layer will undergo special treatment by an embossing machine. Such an embossing process not only adds visual beauty to the toilet paper, but also plays a key role in fixing between layers, effectively preventing the separation between layers. In addition, embossing also ingeniously increases the contact area of the tissue paper, so that the toilet paper shows better performance during cleaning.

[0003] However, most of the currently widely used embossing equipment adopts the design principle of mutual engagement of concave and convex. In the composite toilet paper produced by this production method, the embossed toilet paper on the upper layer and the lower layer are closely attached, resulting in problems of overall thin thickness and insufficient fluffiness.

[0004] Chinese Patent with Application No. 202011372551.2 discloses a point-to-point glue-free composite embossed toilet paper production process, including: Step 1, the toilet paper roll is unwound at a rated unwinding line speed V0; Step 2, the toilet paper roll is divided into a first toilet paper layer and a second toilet paper layer; Step 3, the first toilet paper layer is drawn to a first embossing device for embossing to form an upper embossed toilet paper; the controller controls the embossing line speed V2 of the upper embossed toilet paper; the second toilet paper layer is drawn to a second embossing device for embossing to form a lower embossed toilet paper; the controller controls the embossing line speed V3 of the lower embossed toilet paper; the upper embossed toilet paper and the lower embossed toilet paper are input between a first embossing steel roller and a second embossing steel roller for pressing to form a multi-layer composite embossed toilet paper, and the embossing patterns on the upper embossed toilet paper and the lower embossed toilet paper are in the same position and are mirror images of each other; Step 4, the controller automatically adjusts V1, V2, and V3 to be maintained at V0. This production process can improve the thickness and fluffiness of toilet paper.

[0005] Although the above-mentioned embossing equipment is ingeniously designed to form mirror-image embossing patterns at the same position on the upper and lower toilet papers, thus enhancing the fluffiness of the toilet paper to a certain extent, in actual application, the production process of combining only two papers has significantly insufficient thickness compared with conventional three-layer composite toilet paper. Therefore, the toilet paper produced by this production process fails to meet the actual requirements in terms of thickness, thereby affecting its use strength and durability.

[0006] In addition, when the embossing equipment embosses the paper, the control requirement for the embossing depth is extremely high, and it needs to be precisely adjusted according to the thickness of the paper. If the embossing is too shallow, the composite effect is not good, it is easy to delaminate during use, and the fluffiness of the paper is not ideal; conversely, if the embossing is too deep, the strength of the paper will be seriously lost, resulting in the toilet paper being easily torn during use, seriously affecting the user experience. However, the existing sizing composite embossing machines lack the function of adjusting the embossing depth of the paper according to the process requirements.

[0007] In view of this, it is particularly crucial and urgent to develop a misaligned composite printed paper and its production process that can effectively overcome the above technical problems. Summary of the Invention

[0008] The purpose of the present invention is to provide a misaligned composite printed paper and its production process to solve the technical problems raised in the above background technology.

[0009] To achieve the above purpose, the present invention provides the following technical solutions:

[0010] A misaligned composite printed paper includes a surface layer part, a core layer part, and a bottom layer part that are sequentially distributed from top to bottom.

[0011] The surface layer part includes surface layer convex parts and surface layer concave parts that are arrayed and staggered.

[0012] The bottom layer part includes bottom layer convex parts and bottom layer concave parts that are arrayed and staggered, and the positions where the bottom layer convex parts and bottom layer concave parts are located correspond to the positions where the surface layer convex parts and surface layer concave parts are located.

[0013] The core layer part includes core layer convex parts and core layer concave parts that are arrayed and staggered. The core layer convex parts are adapted to the surface layer convex parts, and the core layer concave parts are adapted to the bottom layer concave parts.

[0014] The present invention also provides a production process for producing misaligned composite printed paper. The production process includes the following steps:

[0015] S1. The core layer part passes through the core layer embossing device along the second path to emboss arrayed and staggered core layer convex parts and core layer concave parts, and then transfers to the middle of the embossing composite device.

[0016] S2. The surface layer part and the bottom layer part respectively enter the middle of the embossing composite device along the first and third paths, and are respectively embossed by the embossing composite device to form arrayed and staggered surface layer convex parts and surface layer concave parts, bottom layer convex parts and bottom layer concave parts.

[0017] S3. After the core layer part enters the embossing composite device, it contacts the sizing device, and the lower surface of the core layer part is coated with a binder. Then, the core layer convex parts and the surface layer convex parts are nested.

[0018] S4. In the middle of the embossing and laminating device, the surface layer, the core layer and the bottom layer perform a laminating operation. The core layer concave part and the bottom layer concave part are nested, and at the same time, the binder penetrates into the surface layer and the bottom layer under the capillary action of the core layer, so that the surface layer, the core layer and the bottom layer are combined;

[0019] Among them, the core layer embossing device includes a first frame, and a group of core layer embossing rollers for embossing the core layer are arranged on the first frame. Transfer rollers are arranged on both sides of the core layer embossing roller;

[0020] The embossing and laminating device includes a second frame, and a surface layer embossing assembly and a bottom layer embossing assembly are arranged on the second frame in a mirror image. A gluing device is arranged between the surface layer embossing assembly and the bottom layer embossing assembly, and a core layer traction roller is arranged above the gluing device.

[0021] Preferably, the core layer embossing roller includes a rigid roller, and embossing parts are arranged on the rigid roller in an array, and pressure-bearing parts are arranged between adjacent two of the embossing parts;

[0022] Among the two core layer embossing rollers arranged on the first frame, the embossing part of one of the core layer embossing rollers is in contact with the pressure-bearing part of the other core layer embossing roller.

[0023] Preferably, the surface layer embossing assembly includes a surface layer embossing steel roller arranged on the second frame, a surface layer embossing rubber roller is arranged above the surface layer embossing steel roller, and a surface layer traction roller is arranged outside the surface layer embossing rubber roller;

[0024] The bottom layer embossing assembly includes a bottom layer embossing steel roller arranged on the second frame, a bottom layer embossing rubber roller is arranged above the bottom layer embossing steel roller, and a bottom layer traction roller is arranged outside the bottom layer embossing rubber roller;

[0025] The embossing points on the surface of the bottom layer embossing steel roller and the embossing points on the surface of the surface layer embossing steel roller are arranged in a mirror image of each other.

[0026] Preferably, the gluing device includes a gluing box with composite glue inside. A glue application port is arranged on one side of the gluing box facing the surface layer embossing steel roller. A glue application roller is arranged at the glue application port, and the glue application roller is in contact with the surface of the core layer.

[0027] Preferably, both the bottom layer embossing rubber roller and the surface layer embossing rubber roller include a hollow rubber cylinder, and an adjusting component is arranged inside the hollow rubber cylinder, and the adjusting component is used to adjust the diameter of the hollow rubber cylinder;

[0028] Both ends of the adjusting component are provided with air suction components, and the air suction components are used to pull the paper surface;

[0029] A gas collecting assembly is provided outside the air suction assembly, and the gas collecting assembly passes gas into the adjusting assembly through the air suction assembly.

[0030] Preferably, the adjusting assembly includes a support cylinder disposed inside a hollow rubber cylinder. The support cylinder is hollow, and a partition is provided inside the support cylinder. The partition divides the support cylinder into two regions. An elastic diaphragm is disposed outside the support cylinder, and the outside of the elastic diaphragm is connected to the hollow rubber cylinder;

[0031] The support cylinder is provided with through holes distributed in an array, and the inner region of the support cylinder is communicated with the hollow rubber cylinder through the through holes.

[0032] Preferably, the air suction assembly includes air suction blocks disposed at both ends of the support cylinder, and air suction channels are provided on the outside of the air suction blocks;

[0033] One end of the air suction block away from the support cylinder is provided with a hollow cylinder, and air inlet holes are provided on the outside of the hollow cylinder. The air inlet holes are communicated with the inner region of the support cylinder.

[0034] Preferably, the gas collecting assembly includes a gas collecting cover disposed outside the hollow cylinder. One end of the gas collecting cover is fixedly connected to the second frame, and the other end of the gas collecting cover is rotatably connected to the air suction block;

[0035] An airless fan is provided inside the gas collecting cover. The airless fan is provided with blades distributed in an array, and a deflecting member for adjusting the deflection angle of the blades is provided on the blades;

[0036] The gas collecting cover is provided with ventilation holes, and the second frame is provided with a connection channel connected to the ventilation holes. The air outlet of the connection channel faces the side wall of the hollow rubber cylinder.

[0037] Preferably, the deflecting member includes a through groove provided on the blade, and an arc groove is provided inside the through groove;

[0038] An activity block is provided inside the through groove. A convex point adapted to the arc groove is provided on the outside of the activity block, and a pushing portion is provided at the end of the activity block.

[0039] The technical effects and advantages of the present invention:

[0040] 1. The misaligned composite printing paper proposed by the present invention has the convex part of the core layer tightly combined with the convex part of the surface layer, while the concave part of the core layer matches the concave part of the bottom layer, and the concave parts of the surface layer and the bottom layer are both combined with the flat part of the core layer; this combination not only forms a cavity structure, significantly improving the thickness and fluffiness of the toilet paper, but also enhancing the connection strength of the toilet paper due to the existence of the core layer part. In particular, the combination of the convex part and the concave part of the core layer with the convex part and the concave part of the surface layer and the bottom layer respectively provides a solid support for the cavity structure between the surface layer part and the bottom layer part.

[0041] 2. By setting the suction blocks and the connection channels in the present invention, when the suction channels on the suction blocks contact the paper surface, the suction blocks distributed at both ends of the hollow rubber cylinder will firmly adsorb and fix both sides of the paper surface, avoiding the phenomenon of paper surface wrinkling when the paper surface passes through the area between the traction roller and the embossing rubber roller; at the same time, after the air flow is sucked into the air collecting hood through the suction channels, it is discharged from the inner side surface of the second rack through the connection channels. During this process, the gas impacts and cleans the paper surface, effectively removing the impurities adhered to the paper surface and ensuring the perfect combination of the surface layer part, the core layer part and the bottom layer part.

[0042] 3. By detecting the value of the flow sensor inside the suction channel in the present invention, the thickness information of the paper surface can be accurately obtained. According to the change of the paper surface thickness, the control system will automatically adjust the expansion or contraction of the hollow rubber cylinder, and then change the extrusion strength between the outer wall of the surface embossing rubber roller and the embossing points on the surface embossing steel roller, thereby realizing the adaptive adjustment of the embossing depth, achieving continuous and stable control of the paper surface thickness and embossing depth, and improving the production efficiency.

[0043] 4. Through the flow sensors distributed on the two suction blocks in the present invention, it can detect in real time whether the paper surface is skewed; once the paper surface is found to be skewed, the control system can accurately judge the offset amount and the offset direction, and immediately start the deviation correction mechanism. According to the specific situation of the paper surface skew, it dynamically adjusts the expansion amount of the hollow rubber cylinder, changes the contact area and pressure between the paper surface and the hollow rubber cylinder, and uses the friction difference to guide the paper surface to return to normal; at the same time, by adjusting the deflection angle of the blade through the deflector, the contact area and the interaction force between the air flow and the blade are further increased, the suction force of the suction channel is enhanced, and the rate and stability of the paper surface returning to normal are further improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 It is a schematic diagram of the production process of the misaligned composite printing paper of the present invention.

[0045] Figure 2 It is a schematic diagram of the structure of the embossing and composite device of the present invention.

[0046] Figure 3 It is a schematic diagram of the structure of the embossing and composite device of the present invention from another perspective.

[0047] Figure 4 This is a schematic structural diagram of the core layer embossing device of the present invention.

[0048] Figure 5 This is a schematic structural diagram of the core layer embossing roller of the present invention.

[0049] Figure 6 This is a schematic structural diagram of the surface layer embossing assembly of the present invention.

[0050] Figure 7 For the present invention Figure 6 An enlarged schematic structural diagram of part A.

[0051] Figure 8 This is a schematic structural diagram of the air suction assembly of the present invention.

[0052] Figure 9 This is a schematic structural diagram of the adjustment assembly of the present invention.

[0053] Figure 10 This is a cross-sectional structural diagram of the adjustment assembly of the present invention.

[0054] Figure 11 This is a schematic structural diagram of the deflection member of the present invention.

[0055] Figure 12 This is an exploded view of the misaligned composite printing paper of the present invention.

[0056] Figure 13 This is a cross-sectional structural diagram of the misaligned composite printing paper of the present invention.

[0057] Reference numerals are:

[0058] 100, surface layer part; 1001, surface layer convex part; 1002, surface layer concave part;

[0059] 200, core layer part; 2001, core layer convex part; 2002, core layer concave part;

[0060] 300, bottom layer part; 3001, bottom layer convex part; 3002, bottom layer concave part;

[0061] 1, core layer embossing device; 101, first frame; 102, core layer embossing roller; 1021, rigid roller; 1022, embossing part; 1023, bearing part; 103, transfer roller;

[0062] 2, embossing and composite device; 201, second frame; 202, surface layer embossing assembly; 2021, surface layer traction roller; 2022, surface layer embossing steel roller; 2023, surface layer embossing rubber roller; 203, bottom layer embossing assembly; 2031, bottom layer traction roller; 2032, bottom layer embossing steel roller; 2033, bottom layer embossing rubber roller; 204, core layer traction roller;

[0063] 3. Gluing device; 301. Gluing tank; 302. Gluing roller

[0064] 4. Hollow rubber cylinder

[0065] 5. Adjusting component; 501. Support cylinder; 502. Through hole; 503. Partition board; 504. Elastic diaphragm

[0066] 6. Suction component; 601. Suction block; 602. Suction channel; 603. Hollow cylinder; 604. Air inlet hole

[0067] 7. Air collecting component; 701. Air collecting hood; 702. Shaftless fan; 703. Blade; 704. Deflecting part; 7041. Through groove; 7042. Arc groove; 7043. Movable block; 7044. Pushing part

[0068] 8. Ventilation hole

[0069] 9. Connection channel Detailed implementation manners

[0070] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0071] Embodiment 1

[0072] Refer to Figures 1 to 13 As shown, the present invention provides a misaligned composite printing paper, which includes a surface layer part 100, a core layer part 200, and a bottom layer part 300 that are sequentially distributed from top to bottom.

[0073] Specifically, the distribution of the surface layer part 100, the core layer part 200, and the bottom layer part 300 is specifically as Figure 12 shown; the cross-section after the combination of the surface layer part 100, the core layer part 200, and the bottom layer part 300 is as Figure 13 shown; the docking of the surface layer part 100 and the bottom layer part 300 is used to improve the fluffiness of the toilet paper, and the core layer part 200 arranged between the surface layer part 100 and the bottom layer part 300 is used to improve the strength of the toilet paper.

[0074] The surface layer part 100 includes surface layer convex parts 1001 and surface layer concave parts 1002 that are arranged in an array and staggered distribution.

[0075] The bottom layer part 300 includes bottom layer convex parts 3001 and bottom layer concave parts 3002 that are distributed in an array and interlaced, and the positions where the bottom layer convex parts 3001 and the bottom layer concave parts 3002 are located correspond to the positions where the surface layer convex parts 1001 and the surface layer concave parts 1002 are located.

[0076] The core layer part 200 includes core layer convex parts 2001 and core layer concave parts 2002 that are distributed in an array and interlaced. The core layer convex parts 2001 are adapted to the surface layer convex parts 1001, and the core layer concave parts 2002 are adapted to the bottom layer concave parts 3002.

[0077] Specifically, the distance between the core layer convex parts 2001 and the core layer concave parts 2002 is equal to the distance between two surface layer concave parts 1002 and one surface layer convex part 1001. The height of the surface layer convex parts 1001 and the surface layer concave parts 1002 is greater than that of the core layer convex parts 2001 and the core layer concave parts 2002, and the height of the bottom layer convex parts 3001 and the bottom layer concave parts 3002 is greater than that of the core layer convex parts 2001 and the core layer concave parts 2002.

[0078] In the present application, the embossed pattern on the surface layer part 100 of the offset composite printing paper is mirror - distributed with the embossed pattern on the bottom layer part 300, and the embossed pattern on the core layer part 200 is inlaid with the embossed pattern on the surface layer part 100 and the embossed pattern on the bottom layer part 300.

[0079] Specifically, the core layer convex parts 2001 on the core layer part 200 are combined with the surface layer convex parts 1001 on the surface layer part 100, the core layer concave parts 2002 on the core layer part 200 are combined with the bottom layer concave parts 3002 on the bottom layer part 300, and both the surface layer concave parts 1002 on the surface layer part 100 and the bottom layer concave parts 3002 on the bottom layer part 300 are combined with the core layer flat parts on the core layer part 200; after the above connections are made, a cavity structure is formed between the surface layer convex parts 1001 on the surface layer part 100 and the bottom layer concave parts 3002 on the bottom layer part 300, which improves the thickness and fluffiness of the toilet paper. At the same time, since the core layer part 200 is provided between the surface layer part 100 and the bottom layer part 300, the connection strength of the toilet paper is improved to a certain extent, and the core layer convex parts 2001 and the core layer concave parts 2002 on the core layer part 200 are combined with the surface layer convex parts 1001 and the bottom layer concave parts 3002 respectively, thereby improving the support strength of the cavity structure between the surface layer part 100 and the bottom layer part 300 to a certain extent.

[0080] Embodiment Two

[0081] Referring to Figures 1 to 13 As shown, the present invention also provides a production process for producing offset composite printing paper. The production process includes the following steps:

[0082] S1. First, the core layer part 200 enters the core layer embossing device 1 along the second path for embossing treatment. During this process, the core layer embossing device 1 imprints arrayed and staggered core layer convex parts 2001 and core layer concave parts 2002 on the upper surface of the core layer part 200. Subsequently, the core layer part 200 enters the middle area of the embossing and laminating device 2 through transfer.

[0083] S2. The surface layer part 100 enters the middle area of the embossing and laminating device 2 from top to bottom along the first path. During this process, the embossing and laminating device 2 imprints arrayed and staggered surface layer convex parts 1001 and surface layer concave parts 1002 on the surface layer part 100. At the same time, the bottom layer part 300 enters the middle area of the embossing and laminating device 2 from bottom to top along the third path, and the embossing and laminating device 2 also imprints arrayed and staggered bottom layer convex parts 3001 and bottom layer concave parts 3002 on the bottom layer part 300.

[0084] S3. After the core layer part 200 enters the embossing and laminating device 2, it first contacts the gluing device 3 provided on the embossing and laminating device 2. The gluing device 3 applies a binder on the lower surface of the core layer part 200. Then, as the core layer part 200 continues to run, the core layer convex parts 2001 of the core layer part 200 are gradually nested with the surface layer convex parts 1001 of the surface layer part 100.

[0085] S4. When the surface layer part 100 and the core layer part 200 reach the middle of the embossing and laminating device 2, the embossing and laminating device 2 performs a composite operation on the surface layer part 100, the core layer part 200, and the bottom layer part 300. During this process, the core layer concave parts 2002 and the bottom layer concave parts 3002 perform a nested composite operation. At the same time, under the capillary action of the core layer part 200 itself, the binder gradually penetrates into the surface layer part 100 and the bottom layer part 300 and binds with them.

[0086] Compared with the traditional embossing and laminating process, in this embodiment, the core layer part 200 is pre-treated, and during the transportation of the core layer part 200, it is nested with the surface layer convex parts 1001 and the bottom layer concave parts 3002 in sequence, so as to improve the structural strength of the produced toilet paper while ensuring its fluffiness, and avoid the phenomenon that the toilet paper is easily torn during use and affects the user experience.

[0087] Embodiment 3

[0088] In order to realize the superiority of the tissue paper produced by the above production process, the structures of the core layer embossing device 1 and the embossing and laminating device 2 are also optimized.

[0089] Specifically, the core layer embossing device 1 includes a first frame 101. A group of core layer embossing rollers 102 for embossing the core layer part 200 are provided on the first frame 101, and transfer rollers 103 are provided on both sides of the core layer embossing rollers 102.

[0090] Taking Figure 1 as an example, the core layer part 200 enters between the two core layer embossing rollers 102 from the transfer roller 103 on the left side. The two core layer embossing rollers 102 emboss the core layer part 200, and the embossed core layer part 200 enters the embossing and laminating device 2 through the transfer roller 103 on the right side.

[0091] The embossing and laminating device 2 includes a second frame 201. On the second frame 201, there are surface layer embossing components 202 and bottom layer embossing components 203 arranged in a mirror image. Between the surface layer embossing components 202 and the bottom layer embossing components 203, there is an adhesive applying device 3, and above the adhesive applying device 3, there is a core layer traction roller 204.

[0092] The surface layer part 100 enters the interior of the surface layer embossing component 202 from the top of the second frame 201, and the surface layer embossing component 202 embosses the surface layer part 100; the bottom layer part 300 enters the interior of the bottom layer embossing component 203 from the bottom of the second frame 201, and the bottom layer embossing component 203 embosses the bottom layer part 300; the core layer part 200 enters between the surface layer embossing component 202 and the bottom layer embossing component 203 through the core layer traction roller 204, and the surface layer embossing component 202 and the bottom layer embossing component 203 perform embossing and laminating processing on the surface layer part 100, the core layer part 200, and the bottom layer part 300.

[0093] Referring to Figures 1 to 5 as shown, the core layer embossing roller 102 includes a rigid roller 1021. On the rigid roller 1021, there are embossing parts 1022 distributed in an array, and between adjacent two embossing parts 1022, there are pressure-bearing parts 1023.

[0094] Among the two core layer embossing rollers 102 arranged on the first frame 101, the embossing part 1022 of one core layer embossing roller 102 is in contact with the pressure-bearing part 1023 of the other core layer embossing roller 102.

[0095] At the end of the core layer embossing roller 102, there is an external driving device. The external driving device is arranged on the first frame 101. The external driving device drives the two core layer embossing rollers 102 to rotate relative to each other, so that the embossing part 1022 imprints arrayed and staggered core layer convex parts 2001 and core layer concave parts 2002 on the core layer part 200.

[0096] Specifically, when the two core layer embossing rollers 102 perform embossing operations on the core layer part 200, the rotation directions of the two core layer embossing rollers 102 are opposite.

[0097] Referring to Figures 1 to 3As shown, the surface embossing assembly 202 includes a surface embossing steel roller 2022 disposed on the second frame 201. Above the surface embossing steel roller 2022, there is a surface embossing rubber roller 2023, and outside the surface embossing rubber roller 2023, there is a surface traction roller 2021.

[0098] The surface layer 100 enters the surface embossing assembly 202 through the surface traction roller 2021, then enters between the surface embossing rubber roller 2023 and the surface embossing steel roller 2022 through the transfer of the surface embossing rubber roller 2023, and the embossing points on the surface embossing steel roller 2022 imprint array-distributed surface recesses 1002 on the surface layer 100.

[0099] The bottom embossing assembly 203 includes a bottom embossing steel roller 2032 disposed on the second frame 201. Above the bottom embossing steel roller 2032, there is a bottom embossing rubber roller 2033, and outside the bottom embossing rubber roller 2033, there is a bottom traction roller 2031.

[0100] The bottom layer 300 enters the bottom embossing assembly 203 through the bottom traction roller 2031, then enters between the bottom embossing rubber roller 2033 and the bottom embossing steel roller 2032 through the transfer of the bottom embossing rubber roller 2033, and the embossing points on the bottom embossing steel roller 2032 imprint array-distributed bottom protrusions 3001 on the bottom layer 300.

[0101] The embossing points on the surface of the bottom embossing steel roller 2032 and the embossing points on the surface of the surface embossing steel roller 2022 are mirror images of each other.

[0102] When the bottom layer 300 and the surface layer 100 enter between the bottom embossing steel roller 2032 and the surface embossing steel roller 2022, the bottom embossing steel roller 2032 and the surface embossing steel roller 2022 apply pressure to the bottom protrusions 3001 of the bottom layer 300 and the surface recesses 1002 of the surface layer 100, forcing them to combine with each other.

[0103] Refer to Figures 1 to 2 As shown, the gluing device 3 includes a gluing tank 301 with composite glue inside. On one side of the gluing tank 301 facing the surface embossing steel roller 2022, there is a glue application port, and at the glue application port, there is a gluing roller 302, and the gluing roller 302 is in contact with the surface of the core layer 200.

[0104] A glue taking roller is arranged in the gluing tank 301, and the glue taking roller is partially immersed in the composite glue. Above the glue taking roller, there is a glue transferring roller. One side of the glue transferring roller facing the glue application port is in contact with the gluing roller 302. The composite glue is transferred to the gluing roller 302 through the glue taking roller and the glue transferring roller, and the gluing roller 302 applies the composite glue to the core layer 200.

[0105] Specifically, a driving motor for driving the glue application roller 302 to rotate is provided on the glue application box 301. A transmission assembly is provided between the glue application roller 302, the glue taking roller and the glue transferring roller. When the driving motor drives the glue application roller 302 to rotate, the glue taking roller and the glue transferring roller are synchronously driven to rotate. The transmission assembly belongs to the prior art and will not be elaborated here.

[0106] Specifically, during the embossing and laminating process of the surface layer portion 100, the core layer portion 200 and the bottom layer portion 300, the thicknesses of the surface layer portion 100, the core layer portion 200 and the bottom layer portion 300 are the same.

[0107] Specifically, driving devices are provided at the ends of the core layer embossing roller 102, the surface layer embossing steel roller 2022, the surface layer embossing rubber roller 2023, the bottom layer embossing steel roller 2032 and the bottom layer embossing rubber roller 2033. When the driving devices rotate, the rotation speeds are the same.

[0108] The rotation direction of the surface layer embossing steel roller 2022 is opposite to that of the surface layer embossing rubber roller 2023, the rotation direction of the bottom layer embossing steel roller 2032 is opposite to that of the bottom layer embossing rubber roller 2033, and the rotation direction of the surface layer embossing steel roller 2022 is opposite to that of the bottom layer embossing steel roller 2032. Moreover, the rotation directions of the two core layer embossing rollers 102 provided on the first frame 101 are opposite.

[0109] Taking Figure 1 as an example, during use, the core layer portion 200 enters the embossing and laminating device 2 along the second path. Specifically:

[0110] The core layer portion 200 enters between the two core layer embossing rollers 102 from the transfer roller 103 on the left side of the first frame 101. The embossing portions 1022 and the bearing portions 1023 on the two core layer embossing rollers 102 perform an embossing operation on the core layer portion 200. The embossing portions 1022 and the bearing portions 1023 emboss the core layer convex portions 2001 and the core layer concave portions 2002 that are arranged in an array and staggered on the core layer portion 200. The core layer portion 200 that has completed the embossing operation enters the embossing and laminating device 2 from the transfer roller 103 on the right side of the first frame 101. After the core layer portion 200 enters the embossing and laminating device 2, it enters between the surface layer embossing steel roller 2022 and the bottom layer embossing steel roller 2032 through the transfer of the core layer traction roller 204.

[0111] The surface layer portion 100 enters the embossing and laminating device 2 along the first path. Specifically:

[0112] The surface layer portion 100 enters between the surface embossing steel roller 2022 and the surface embossing rubber roller 2023 from the surface traction roller 2021 at the top of the second rack 201. Through the cooperation of the surface embossing steel roller 2022 and the surface embossing rubber roller 2023, an embossing operation is performed on the surface layer portion 100, and surface convex portions 1001 and surface concave portions 1002 that are arrayed and staggered are embossed on its surface. The surface layer portion 100 that has completed the embossing operation gradually enters between the surface embossing steel roller 2022 and the bottom embossing steel roller 2032.

[0113] The bottom layer portion 300 enters the embossing and laminating device 2 along the third path. Specifically:

[0114] The bottom layer portion 300 enters between the bottom embossing steel roller 2032 and the bottom embossing rubber roller 2033 from the bottom traction roller 2031 at the bottom of the second rack 201. Through the cooperation of the bottom embossing steel roller 2032 and the bottom embossing rubber roller 2033, an embossing operation is performed on the bottom layer portion 300, and bottom convex portions 3001 and bottom concave portions 3002 that are arrayed and staggered are embossed on its surface. The bottom layer portion 300 that has completed the embossing operation gradually enters between the surface embossing steel roller 2022 and the bottom embossing steel roller 2032.

[0115] When the surface layer portion 100, the core layer portion 200, and the bottom layer portion 300 all enter between the surface embossing steel roller 2022 and the bottom embossing steel roller 2032, the surface embossing steel roller 2022 and the bottom embossing steel roller 2032 perform a composite operation on the three.

[0116] Specifically, during the process in which the core layer portion 200 enters between the surface embossing steel roller 2022 and the bottom embossing steel roller 2032 through the core layer traction roller 204, the gluing device 3 first performs a coating operation on the lower surface of the core layer portion 200. And as the core layer portion 200 continues to run, the core convex portions 2001 of the core layer portion 200 are sleeved prior to the surface convex portions 1001. After the core layer portion 200 enters the area between the surface embossing steel roller 2022 and the bottom embossing steel roller 2032, the core concave portions 2002 on the core layer portion 200 are sleeved with the bottom concave portions 3002. Thus, the combination among the surface layer portion 100, the core layer portion 200, and the bottom layer portion 300 is completed.

[0117] Example 4

[0118] Although the above embodiments can achieve the combination among the surface layer portion 100, the core layer portion 200, and the bottom layer portion 300, there are still some problems in actual applications. Specifically, during the transmission of the surface layer portion 100 and the bottom layer portion 300 (hereinafter referred to as the paper surface), when the paper surface passes through the area between the traction roller and the embossing rubber roller, wrinkles are likely to occur. Such wrinkles will further affect the combination quality among the surface layer portion 100, the core layer portion 200, and the bottom layer portion 300.

[0119] In view of this, in this embodiment, the above embodiment is modified to address the above problems, and the specific improvement solutions are as follows:

[0120] Referring to Figures 6 to 10 as shown, both the bottom embossing rubber roller 2033 and the surface embossing rubber roller 2023 include a hollow rubber cylinder 4, and an adjustment assembly 5 is provided inside the hollow rubber cylinder 4. The adjustment assembly 5 is used to regulate the diameter of the hollow rubber cylinder 4.

[0121] Suction assemblies 6 are provided at both ends of the adjustment assembly 5, and the suction assemblies 6 are used to pull the paper surface.

[0122] A gas collection assembly 7 is provided outside the suction assembly 6, and the gas collection assembly 7 passes gas into the adjustment assembly 5 through the suction assembly 6.

[0123] Referring to Figures 6 to 10 as shown, the adjustment assembly 5 includes a support cylinder 501 provided inside the hollow rubber cylinder 4, and the support cylinder 501 is hollow.

[0124] The support cylinder 501 is provided with through holes 502 distributed in an array, and the inner area of the support cylinder 501 is communicated with the hollow rubber cylinder 4 through the through holes 502.

[0125] The gas collection assembly 7 extracts external air through the suction assembly 6 and discharges it into the inside of the support cylinder 501. The gas entering the inside of the support cylinder 501 enters the inside of the hollow rubber cylinder 4 through the support cylinder 501, thereby driving the hollow rubber cylinder 4 to expand, so as to adjust the extrusion force between the hollow rubber cylinder 4 and the embossing steel roller.

[0126] Referring to Figures 6 to 10 as shown, the suction assembly 6 includes suction blocks 601 provided at both ends of the support cylinder 501, and suction channels 602 are provided on the outside of the suction blocks 601 in an array.

[0127] A flow sensor is provided inside the suction channel 602, and by detecting the value of the flow sensor, it is possible to judge the thickness of the paper passing through the hollow rubber cylinder 4 and whether the paper is deflected during operation.

[0128] One end of the suction block 601 away from the support cylinder 501 is provided with a hollow cylinder 603, and intake holes 604 are provided on the outside of the hollow cylinder 603 in an array. The intake holes 604 are communicated with the inner area of the support cylinder 501.

[0129] The hollow cylinder 603 is connected to the output shaft of an external driving device.

[0130] The gas collection assembly 7 pumps external gas into its interior through the suction channels 602. The gas entering the interior of the gas collection assembly 7 enters the hollow rubber cylinder 4 through the intake holes 604 and the transfer of the hollow cylinder 603, thereby driving the hollow rubber cylinder 4 to expand.

[0131] A control valve is provided at the connection between the hollow cylinder 603 and the hollow rubber cylinder 4, and the control valve is used to control whether the hollow rubber cylinder 4 is connected to the hollow cylinder 603 or not.

[0132] Refer to Figures 6 to 12 As shown in the figure, the gas collection assembly 7 includes a gas collection hood 701 provided on the outer side of the hollow cylinder 603. One end of the gas collection hood 701 is fixedly connected to the second frame 201, and the other end of the gas collection hood 701 is rotatably connected to the suction block 601.

[0133] An airless fan 702 is provided inside the gas collection hood 701. The airless fan 702 is provided with blades 703 distributed in an array, and a deflection member 704 for adjusting the deflection angle of the blades 703 is provided on the blades 703.

[0134] Vent holes 8 are provided on the gas collection hood 701, and a connection channel 9 connected to the vent holes 8 is provided on the second frame 201. The outlet of the connection channel 9 faces the side wall of the hollow rubber cylinder 4.

[0135] When the hollow cylinder 603 and the hollow rubber cylinder 4 are in a non-connected state, the gas collection assembly 7 pumps external gas into the interior through the suction channel 602. The gas entering the interior of the gas collection assembly 7 is discharged from the inner side surface of the second frame 201 through the transfer of the vent holes 8 and the connection channel 9. The discharged gas impacts and cleans the paper surface, avoiding the influence of impurities adhered to the paper surface on the lamination of the surface layer 100, the core layer 200, and the bottom layer 300.

[0136] Specifically, the airless fan 702 can be analogized to an airless propeller, which belongs to the prior art and will not be elaborated here.

[0137] In the initial state, the control valve at the connection between the hollow cylinder 603 and the support cylinder 501 is in the closed state, and at this time, the air inlet hole 604 and the support cylinder 501 are in a non-connected state (specifically refer to Figure 10 shown in the figure).

[0138] Taking the operation of the surface layer 100 as an example, when the surface layer 100 enters the area between the surface embossing steel roller 2022 and the surface embossing rubber roller 2023 through the surface traction roller 2021, the surface layer 100 first contacts the right half area of the surface traction roller 2021 (specifically as Figure 1 shown in the figure).

[0139] During the process that the surface layer part 100 first contacts the right half area of the surface layer traction roller 2021, the control system controls the shaftless fan 702 to start. After the shaftless fan 702 starts, it drives the blades 703 to rotate around the hollow cylinder 603. As the blades 703 rotate, the external air is sucked into the inside of the air collecting hood 701 through the air suction channels 602 on the air suction blocks 601. The gas that enters the inside of the air collecting hood 701 is discharged from the inner side surface of the second rack 201 through the transfer of the ventilation holes 8 and the connection channels 9. The discharged gas impacts and cleans the paper surface, avoiding the impurities adhered to the paper surface from affecting the lamination of the surface layer part 100, the core layer part 200, and the bottom layer part 300.

[0140] Specifically, an installation valve is provided inside the connection channel 9. The installation valve is used to control the connection between the connection channel 9 and the air collecting hood 701. In the initial state, the installation valve is in the open state, and at this time, the connection channel 9 and the air collecting hood 701 are in a connected state.

[0141] During the process that the shaftless fan 702 sucks external gas through the air suction channels 602, the air suction channels 602 themselves will also generate a suction force. When the air suction channels 602 on the air suction blocks 601 contact the paper surface, the air suction channels 602 simultaneously adsorb the paper surface. At the same time, since the air suction blocks 601 are distributed at both ends of the hollow rubber cylinder 4, normally, the air suction blocks 601 distributed at both ends of the hollow rubber cylinder 4 adsorb and fix both sides of the paper surface, thereby avoiding the phenomenon that the paper surface wrinkles when passing through the area between the traction roller and the embossing rubber roller.

[0142] It should be noted that: the cross-section of the air inlet of the air suction channel 602 in this embodiment is in a contracted shape. Steel balls are provided inside the air suction channel 602. The steel balls are elastically connected to the air suction channel 602 through springs. The diameter of the steel balls is larger than the diameter of the air inlet of the air suction channel 602 but smaller than the inner diameter of the air suction channel 602 (specifically refer to Figure 10 shown). At the same time, magnetic parts are provided at the positions corresponding to the air suction blocks 601 on the surface embossing steel roller 2022 and the bottom layer embossing steel roller 2032. When the distance between a single air suction channel 602 and the magnetic part reaches the minimum, the steel ball is pulled by the magnetic part to block the air inlet of the air suction channel 602. As the hollow cylinder 603 continues to rotate, affected by the spring restoring force, the spring releases the block of the air inlet of the air suction channel 602. The magnetic force generated by the magnetic part on the steel ball is greater than the suction force generated by the shaftless fan 702.

[0143] Specifically, both sides of the paper surface do not participate in the embossing operation. After the surface layer part 100, the core layer part 200, and the bottom layer part 300 are embossed and laminated, a trimming machine is used to perform trimming operations on both sides of the paper surface. The trimming machine belongs to the prior art and will not be elaborated here.

[0144] A control terminal is provided on the outer side of the second rack 201. A control system is provided inside the control terminal, and the control system is used to control all electrical components on this device.

[0145] During use, when the control system detects that the suction channel 602 contacts the paper surface, it measures the value of the flow sensor provided inside the suction channel 602, thereby obtaining the thickness of the paper surface. Then, it controls the control valve at the connection between the hollow cylinder 603 and the support cylinder 501 to start or close, and further adjusts the diameter of the hollow rubber cylinder 4.

[0146] Specifically, the paper surfaces of the surface layer part 100, the core layer part 200, and the bottom layer part 300 are all breathable paper surfaces, which are the same as the paper surface materials of toilet paper in the prior art, and the thicknesses of the three are the same.

[0147] When the value of the flow sensor at the connection between the hollow cylinder 603 and the support cylinder 501 is detected to be less than the set value, it indicates that the thickness of the paper surface is relatively thick, resulting in less air flow entering the inside of the suction channel 602 through the paper surface, and further causing the value of the flow sensor to be less than the set value.

[0148] When the control system detects that the thickness of the paper surface is relatively thick, it controls the installation valve provided inside the connection channel 9 to close. At this time, the connection channel 9 and the gas collecting hood 701 are in a non-connected state. At the same time, it controls the control valve at the connection between the hollow cylinder 603 and the support cylinder 501 to start. At this time, the hollow cylinder 603 and the support cylinder 501 are in a connected state. The gas entering the inside of the gas collecting hood 701 from the suction channel 602 enters the inside of the support cylinder 501 through the transfer of the air inlet hole 604 and is discharged into the inside of the hollow rubber cylinder 4 through the through hole 502. Since both ends of the hollow rubber cylinder 4 are fixedly connected to their respective corresponding suction blocks 601, after the gas enters the hollow rubber cylinder 4, the hollow rubber cylinder 4 expands, and further increases the extrusion strength between the outer wall of the hollow rubber cylinder 4 (i.e., the outer wall of the surface embossing rubber roller 2023) and the embossing points on the surface embossing steel roller 2022, that is, increases the contact distance between the outer wall of the hollow rubber cylinder 4 and the embossing points on the surface embossing steel roller 2022, and further improves the embossing depth on the paper surface, and further enhances the fluffiness after the combination of the surface layer part 100, the core layer part 200, and the bottom layer part 300.

[0149] Specifically, during actual use, a pressure sensor is provided inside the hollow rubber cylinder 4. When adjusting the increase in the expansion degree of the hollow rubber cylinder 4, the control system constantly monitors the value of the pressure sensor. When it reaches the preset value, the control valve closes, and the hollow cylinder 603 and the support cylinder 501 are in a non-connected state; at the same time, it controls the installation valve inside the connection channel 9 to start, and the connection channel 9 and the gas collecting hood 701 are in a connected state.

[0150] Specifically, the air pressure entering the inside of the hollow rubber cylinder 4 through the air inlet hole 604 is greater than the original air pressure inside the hollow rubber cylinder 4.

[0151] When the value of the flow sensor at the connection between the hollow cylinder 603 and the support cylinder 501 is detected to be greater than the set value, it indicates that the thickness of the paper surface is relatively thin, resulting in a relatively large air flow entering the inside of the air suction channel 602 through the paper surface, and further causing the value of the flow sensor to be greater than the set value.

[0152] When the control system detects that the thickness of the paper surface is relatively thin, it controls the shaftless fan 702 to suspend operation, and at the same time controls the control valve at the connection between the hollow cylinder 603 and the support cylinder 501 to start. Affected by the air pressure inside the hollow rubber cylinder 4 (the hollow rubber cylinder 4 is in an expanded state initially), the air flow inside the hollow rubber cylinder 4 is discharged into the inside of the air collecting hood 701 through the hollow cylinder 603 and the air inlet hole 604, and the gas entering the inside of the air collecting hood 701 is discharged through the connecting channel 9; after the air flow inside the hollow rubber cylinder 4 is discharged, the outer diameter of the hollow rubber cylinder 4 shrinks, thereby reducing the extrusion intensity between the outer wall of the hollow rubber cylinder 4 (i.e., the outer wall of the surface embossing rubber roller 2023) and the embossing points on the surface embossing steel roller 2022, that is, reducing the contact distance between the outer wall of the hollow rubber cylinder 4 and the embossing points on the surface embossing steel roller 2022, and further reducing the embossing depth on the paper surface, avoiding the embossing depth of the embossing steel roller on the paper surface being too large, resulting in loss of the strength of the paper surface, and thus preventing the phenomenon that the toilet paper is easily torn during use.

[0153] Specifically, when adjusting the reduction of the expansion degree of the hollow rubber cylinder 4, the control system continuously monitors the value of the air pressure sensor. When it reaches the preset value, the control valve closes, and the hollow cylinder 603 and the support cylinder 501 are in a non-connected state; at the same time, the shaftless fan 702 is controlled to start again.

[0154] Embodiment Five

[0155] Although the above embodiment solves the phenomenon of wrinkles occurring during the operation of the paper surface through the air suction block 601 and the hollow rubber cylinder 4, in the actual use process, if the tension distribution on the paper surface is uneven, the paper surface is prone to deviation, resulting in uneven thickness distribution after the combination of the surface layer 100, the core layer 200, and the bottom layer 300, and this uneven thickness will seriously affect the user experience.

[0156] In view of this, this embodiment modifies the above embodiment for the above problems, and the specific improvement scheme is as follows:

[0157] Refer to Figures 8 to 10 As shown, a partition 503 is provided inside the support cylinder 501. The partition 503 divides the support cylinder 501 into two regions. An elastic diaphragm 504 is arranged outside the support cylinder 501, and the outside of the elastic diaphragm 504 is connected to the hollow rubber cylinder 4.

[0158] The partition plate 503 is located in the middle of the support cylinder 501, and the elastic diaphragm 504 is located in the middle of the hollow rubber cylinder 4. The partition plate 503 and the elastic diaphragm 504 divide the support cylinder 501 and the hollow rubber cylinder 4 into two regions, specifically including region A and region B.

[0159] Referring to Figures 8 to 11 As shown, the deflector 704 includes a through groove 7041 provided on the blade 703, and an arc groove 7042 is provided inside the through groove 7041.

[0160] An active block 7043 is provided inside the through groove 7041. A bump adapted to the arc groove 7042 is provided on the outer side of the active block 7043, and a pushing portion 7044 is provided at the end of the active block 7043.

[0161] The blade 703 is rotatably connected to the shaftless fan 702. During the process of the pushing portion 7044 stretching and retracting, the active block 7043 is synchronously driven to displace. The bump on the active block 7043 squeezes the arc groove 7042 to cause the blade 703 to rotate, thereby adjusting the deflection angle of the blade 703.

[0162] Since the suction blocks 601 are distributed at both ends of the hollow rubber cylinder 4, under normal circumstances, the suction blocks 601 distributed at both ends of the hollow rubber cylinder 4 adsorb and fix both sides of the paper surface, thereby avoiding the phenomenon of the paper surface wrinkling when passing through the area between the traction roller and the embossing rubber roller.

[0163] However, in the actual application process, affected by the tension, the paper surface is prone to skew during operation. The control system detects the values of the flow sensors distributed on the two suction blocks 601 to determine whether the paper surface is skewed. After the paper surface is skewed, the angle of the blade 703 is controlled by the deflector 704 and the expansion amount of the hollow rubber cylinder 4 is controlled to perform the deviation correction operation on the paper surface.

[0164] Under normal circumstances, the values detected by the flow sensors distributed on the two suction blocks 601 are in a stable state. When the value detected by the flow sensor distributed on a certain suction block 601 is greater than the value detected by the flow sensor distributed on the other suction block 601, it indicates that the paper surface is in a skewed state on the hollow rubber cylinder 4, resulting in partial occlusion of the suction channel 602 on a certain suction block 601 by the paper surface when it contacts the paper surface. The value detected by the flow sensor distributed on this suction block 601 shows a linear change, but generally remains greater than the value detected by the flow sensor of the other suction block 601.

[0165] When the control system based on the numerical changes of the flow sensors distributed on the two suction blocks 601, the offset amount and the offset direction of the paper surface can be obtained.

[0166] Taking Figure 10 as an example, assume that the paper surface on the hollow rubber cylinder 4 shifts towards area B. At this time, according to the shift direction, control the hollow rubber cylinder 4 in area B to expand. The specific operation is as follows:

[0167] Control the installation valve in the connection channel 9 corresponding to the air suction block 601 in area B to close, so that the connection channel 9 and the air collection hood 701 are in a non-connected state. At the same time, the control valve at the connection between the hollow cylinder 603 and the support cylinder 501 is activated. At this time, the hollow cylinder 603 and the support cylinder 501 are in a connected state. As the shaftless fan 702 operates, gas enters the inside of the support cylinder 501 through the air suction channel 602, forcing the hollow rubber cylinder 4 in area B to expand, that is, the right diameter of the hollow rubber cylinder 4 is larger than the left diameter of the hollow rubber cylinder 4, thereby causing the contact area between the paper surface and the hollow rubber cylinder 4 in area A to decrease, the pressure on the contact surface to increase, and the friction force to increase. The greater the friction force, the more difficult it is for the paper to pass through. Therefore, the paper surface will deflect towards area A to make the deflected paper surface return to normal.

[0168] Specifically, when adjusting the increase in the expansion degree of the hollow rubber cylinder 4, the control system continuously monitors the value of the air pressure sensor. When it reaches the preset value, the control valve closes, and the hollow cylinder 603 and the support cylinder 501 are in a non-connected state; at the same time, control the installation valve in the connection channel 9 to be activated, and the connection channel 9 and the air collection hood 701 are in a connected state.

[0169] While controlling the expansion of the hollow rubber cylinder 4 in area B, the control system controls the deflection member 704 on the blade 703 in area A to be activated, and the deflection member 704 drives the deflection angle of the blade 703 to increase. The increase in the deflection angle of the blade 703 may increase the blocking area of the blade 703 for the air flow, thereby increasing the contact area and interaction force between the air flow and the blade 703 to a certain extent. This may cause more air flow to be sucked by the blade 703, that is, when the deflection angle of the blade 703 increases, the suction force of the air suction channel 602 will also increase. When the suction force of the air suction channel 602 in area A increases, the air suction channel 602 can pull the side of the paper surface facing area A, further increasing the rate of the paper surface returning to normal.

[0170] The specific steps for the deflection member 704 to deflect the blade 703 are as follows: when the pushing portion 7044 extends, the movable block 7043 moves upward, and the convex point on the movable block 7043 squeezes the arc-shaped groove 7042 to force the blade 703 to rotate, and the deflection angle of the blade 703 increases; when the pushing portion 7044 contracts, the movable block 7043 moves downward, and the convex point on the movable block 7043 squeezes the arc-shaped groove 7042 to force the blade 703 to reverse, and the deflection angle of the blade 703 decreases.

[0171] The present invention detects the paper thickness through the flow sensor in the air intake channel 602. When the paper is thicker, the value of the flow sensor is less than the set value, the control valve opens, and the gas enters the support cylinder 501 through the air intake hole 604 and then enters the hollow rubber cylinder 4, causing it to expand, increasing the extrusion pressure with the embossing steel roller, and increasing the embossing depth. When the paper is thinner, the value of the flow sensor is greater than the set value, the shaftless fan 702 pauses operation, and at the same time the control valve opens, the gas inside the hollow rubber cylinder 4 is discharged, the diameter of the hollow rubber cylinder 4 shrinks, the extrusion pressure is reduced, and the embossing depth is reduced.

[0172] Meanwhile, the adsorption conditions on both sides of the paper are detected through the flow sensors on the air suction blocks 601 distributed at both ends of the hollow rubber cylinder 4. When the value of the flow sensor on one air suction block 601 is greater than that on the other side, it indicates that the paper is skewed. When the paper is skewed, the control system judges the offset amount and direction of the paper according to the change in the value of the flow sensor. At the same time, by controlling the expansion of the hollow rubber cylinder 4 in the corresponding area, the contact area and pressure between the paper and the hollow rubber cylinder 4 are changed, and the paper is guided back to normal by using the friction difference.

[0173] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and all should be covered within the protection scope of the present invention.

Claims

1. A production process of offset composite printing paper, characterized in that: The production process includes the following steps: S1. The core layer part is imprinted with arrayed and staggered core layer convex parts and core layer concave parts along the second path by the core layer embossing device, and then transferred to the middle part of the embossing and laminating device; S2. The surface layer part and the bottom layer part enter the middle part of the embossing and laminating device along the first path and the third path respectively, and are each imprinted with arrayed and staggered surface layer convex parts and surface layer concave parts, bottom layer convex parts and bottom layer concave parts by the embossing and laminating device; S3. After the core layer part enters the embossing and laminating device, it contacts the gluing device, and the lower surface of the core layer part is coated with the binder, and then the core layer convex parts and the surface layer convex parts are sleeved; S4. In the middle part of the embossing and laminating device, the surface layer part, the core layer part and the bottom layer part perform a composite operation, the core layer concave parts and the bottom layer concave parts are sleeved, and at the same time, the binder penetrates into the surface layer part and the bottom layer part under the capillary action of the core layer part, so that the surface layer part, the core layer part and the bottom layer part are combined; Among them, the embossing and laminating device includes a second frame, and a surface layer embossing assembly and a bottom layer embossing assembly are arranged on the second frame in a mirror image manner. A gluing device is arranged between the surface layer embossing assembly and the bottom layer embossing assembly, and a core layer traction roller is arranged above the gluing device; The surface layer embossing assembly includes a surface layer embossing steel roller and a surface layer embossing rubber roller; The bottom layer embossing assembly includes a bottom layer embossing steel roller and a bottom layer embossing rubber roller; Both the bottom layer embossing rubber roller and the surface layer embossing rubber roller include a hollow rubber cylinder, and an adjusting assembly is arranged inside the hollow rubber cylinder, and the adjusting assembly is used to adjust the diameter of the hollow rubber cylinder; Both ends of the adjusting assembly are provided with air suction assemblies, and the air suction assemblies are used to pull the paper surface; A gas collecting assembly is arranged outside the air suction assembly, and the gas collecting assembly passes gas into the adjusting assembly through the air suction assembly; The air suction assembly includes air suction blocks arranged at both ends of the support cylinder. The outside of the air suction blocks is provided with arrayed air suction channels, and a flow sensor is arranged inside the air suction channels. By detecting the numerical value of the flow sensor, it is possible to judge the thickness of the paper surface passing through the hollow rubber cylinder and whether the paper surface is deflected during operation; The adjusting assembly includes a support cylinder arranged inside the hollow rubber cylinder, and the support cylinder is hollow; The support cylinder is provided with arrayed through holes, and the inner area of the support cylinder is communicated with the hollow rubber cylinder through the through holes.

2. The production process of the offset composite printing paper according to claim 1, characterized in that: The core layer embossing device includes a first frame, and a group of core layer embossing rollers for embossing the core layer part are arranged on the first frame, and transfer rollers are arranged on both sides of the core layer embossing rollers; 3. The production process of the offset composite printed paper according to claim 2, characterized in that: The core layer embossing roller includes a rigid roller, and embossing parts are arranged on the rigid roller in an array, and pressure-bearing parts are arranged between adjacent two embossing parts; Among the two core layer embossing rollers arranged on the first frame, the embossing part of one core layer embossing roller contacts the pressure-bearing part of the other core layer embossing roller.

4. The production process of the offset composite printing paper according to claim 1, characterized in that: The surface layer embossing steel roller is located below the surface layer embossing rubber roller, and a surface layer traction roller is arranged outside the surface layer embossing rubber roller; The bottom layer embossing steel roller is located above the bottom layer embossing rubber roller, and a bottom layer traction roller is arranged outside the bottom layer embossing rubber roller; The embossing points on the surface of the bottom layer embossing steel roller and the embossing points on the surface of the surface layer embossing steel roller are arranged in a mirror image manner.

5. The production process of the offset composite printing paper according to claim 1, characterized in that: The gluing device includes a gluing tank with composite glue inside. One side of the gluing tank facing the surface embossed steel roller is provided with a glue application port, and a glue application roller is arranged at the glue application port. The glue application roller is in contact with the surface of the core layer part.

6. The production process of the offset composite printed paper according to claim 1, characterized in that: A partition is arranged inside the support cylinder, and the partition divides the support cylinder into two areas; An elastic diaphragm is arranged on the outside of the support cylinder, and the outside of the elastic diaphragm is connected to the hollow rubber cylinder.

7. The production process of the offset composite printed paper according to claim 1, characterized in that: One end of the air suction block away from the support cylinder is provided with a hollow cylinder, and a plurality of intake holes are arranged on the outside of the hollow cylinder. The intake holes are communicated with the inner area of the support cylinder.

8. The production process of the offset composite printing paper according to claim 7, characterized in that: The air collection assembly includes an air collection hood arranged on the outside of the hollow cylinder. One end of the air collection hood is fixedly connected to the second frame, and the other end of the air collection hood is rotatably connected to the air suction block; An airless fan is arranged inside the air collection hood. A plurality of blades are arranged on the airless fan, and a deflection member for adjusting the deflection angle of the blades is arranged on the blades; Vent holes are formed in the air collection hood, and a connection channel connected to the vent holes is arranged on the second frame. The air outlet of the connection channel faces the side wall of the hollow rubber cylinder.

9. The production process of the offset composite printed paper according to claim 8, characterized in that: The deflection member includes a through groove arranged on the blade, and an arc groove is arranged inside the through groove; A movable block is arranged inside the through groove. A convex point adapted to the arc groove is arranged on the outside of the movable block, and a pushing portion is arranged at the end of the movable block.

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