Glue-free composite printing system

Abstract

The utility model discloses a glue-free composite printing system, and belongs to the technical field of household paper embossing processes. The device comprises an embossing assembly, a compounding assembly and an adjusting assembly, wherein the embossing assembly is used for pressing textures and patterns on raw paper; the compounding assembly is used for pressing and compounding the two pieces of body paper with the textures and the patterns, so that the two pieces of body paper are in a'gluing 'state at concave parts corresponding to the textures and the patterns; the adjusting assembly is used for adjusting the relative position of the composite protrusions of the composite assembly and eliminating gaps between the transmission gears. According to the glue-free composite printing device, the embossing assembly and the composite assembly are matched with each other, so that glue-free composite printing is realized, and the integrity of printing textures is ensured to the greatest extent. In addition, through the arrangement of the adjusting assembly, the composite protrusions can be conveniently calibrated and aligned, meanwhile, damage to embossing patterns caused by tooth gaps can be eliminated, and the definition of embossing textures is further guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of embossing technology for daily paper, and more specifically relates to a non-glue composite printing system. Background Art

[0002] Paper towels are a necessity in people's daily life. Paper towels are usually made of two or more layers. Embossed composite paper products are widely favored by consumers because of their good water absorption and fluffiness.

[0003] In the existing household paper industry, for some embossed composite paper products, generally, multiple layers of base paper are embossed and formed, and then the multiple layers of embossed base paper are composited to form a composite tissue with a first bulkiness and strong water absorption capacity. There are usually two ways to composite the multiple layers of embossed base paper.

[0004] Method 1: Gluing and lamination

[0005] For example, in the application case CN110202842A, a secondary gluing composite embossing mechanism for household paper is disclosed. The application case firstly rolls glue on the first base paper and the second base paper after embossing through the gluing component, and then the upper surface and the lower surface of the third base paper are respectively contacted and bonded with the glue surface of the first base paper and the glue surface of the second base paper through the composite roller group.

[0006] For example, in patent DE102021123043A1, a thin paper web is guided through an embossing gap between an embossing roller and a counter-roller provided with embossing pins, the embossing needles are moistened with liquid before contacting the thin paper web, and the thin paper web is brought into contact with the embossing needles moistened with liquid, at least during the embossing process, thereby locally applying liquid.

[0007] Although gluing and laminating can well ensure the connection strength and overall fluffiness of paper, it requires a large amount of glue, which not only increases the material cost, but also glue is a chemical synthetic material with certain volatile harmful components, which will cause certain health effects to producers and users during the production process or use, and is not conducive to environmental protection.

[0008] Method 2: Glue-free lamination

[0009] For example, in patent CN108481986A, a double-layer point-to-point glue-free composite embossing system and composite embossed paper are disclosed. In this application, the embossed first base paper and the second base paper meet at the tangent point between the upper embossing roller and the smooth roller to cooperate and compress and composite, so that the first concave point corresponds to the second concave point one by one, and the corresponding bottom end of the first concave point is tightly combined with the bottom end of the second concave point.

[0010] For example, in patent CN102407614A, an embossing device for paper towel processing equipment and its embossing production process are disclosed. The application adopts a segmented design for the embossing roller assembly, and each segment of the embossing roller assembly is pressurized by an independent pressurizer; then, the two groups of embossing roller assemblies cooperate with each other to rotate to form a complementary embossing pattern.

[0011] The above-mentioned glue-free lamination method solves the defects of high cost and environmental disadvantages caused by glue lamination. However, when the printed multi-layer paper is pressed and laminated, the printing marks on the paper near the bottom roller (smooth roller) will be squeezed to a certain extent, resulting in unclear embossing texture and poor embossing effect; it will also affect the fluffiness of the final product. Utility Model Content

[0012] 1. Problems to be solved

[0013] In view of the problem that the glue-free composite printing in the prior art cannot well ensure the integrity of the embossed texture, thus affecting the overall fluffiness of the product, the utility model proposes a glue-free composite printing system. The utility model inserts the composite protrusions on the composite roller into the corresponding recessed parts and performs compression and composite, which can effectively ensure the integrity of the printed texture while achieving glue-free composite, thereby ensuring the fluffiness of the product.

[0014] 2. Technical solution

[0015] In order to solve the above problems, the technical solution adopted by the utility model is as follows:

[0016] The utility model discloses a non-glue composite printing system, comprising an embossing assembly for forming a series of recessed portions on the surface of an original paper; and further comprising:

[0017] A composite assembly, the composite assembly comprising a first composite roller and a second composite roller arranged opposite to each other, and composite protrusions respectively arranged on the two composite rollers, the composite protrusions being accommodated in corresponding recessed portions; composite areas on the two papers are interwoven with each other under the pressure of the composite protrusions located at the composite position to form a non-glued composite;

[0018] And an adjustment component, the adjustment component includes a first gear and a second gear that drive the first composite roller and the second composite roller respectively; wherein the second gear can be rotated and adjusted relative to the second composite roller so that when the two gears are meshed, the composite protrusions at the composite positions on the two composite rollers correspond to each other.

[0019] Furthermore, the embossing assembly is provided with two groups, which include a printing roller and a bottom roller close to each other; wherein the printing roller is provided with a printing protrusion, and the printing protrusion forms the recessed portion on the surface of the base paper; among all the recessed portions formed by the printing protrusion, at least part of them can cooperate with the composite protrusion on the composite roller for glue-free composite between base paper.

[0020] Furthermore, the first composite roller and the embossing roller of one group of embossing components are the same roller body, and the second composite roller and the embossing roller of the other group of embossing components are the same roller body.

[0021] Furthermore, at the composite position, the composite protrusions on the two composite rollers have at least a partial overlap of the pressing surfaces at the top thereof.

[0022] Furthermore, the widths of the top pressing surfaces of a group of composite protrusions corresponding to each other on the first composite roller and the second composite roller are arranged to be larger and smaller.

[0023] Furthermore, there is a group of corresponding composite protrusions, wherein the width of the pressing surface of one composite protrusion is 1.1-2.0 times that of the other composite protrusion.

[0024] Furthermore, the width of the pressing surface of the composite protrusion is 0.5-1.0 mm.

[0025] Furthermore, the gap between the top surfaces of a pair of composite protrusions at the composite position is 0.02 mm-0.2 mm.

[0026] Furthermore, the height of the composite protrusion is not less than the height of the printed protrusion, and protrusions of different heights form a high and low pattern on the surface of the base paper.

[0027] Furthermore, the composite protrusion and the printed protrusion are the same protrusion, and the bottoms of all the recessed parts formed by the protrusion on the original paper are all laminated without glue.

[0028] Furthermore, the adjustment component also includes a third gear coaxially arranged with the second gear, and the teeth on the second gear and the third gear correspond one-to-one to form a total tooth; the second gear and the third gear are seamlessly meshed with the first gear through the total tooth, and the second gear and the third gear can make circumferential relative motion between them.

[0029] Furthermore, the second gear and the third gear are respectively provided with an axially arranged first mounting hole and a second mounting hole; wherein the second mounting hole is a waist-shaped hole, and the fastener passes through the first mounting hole and the second mounting hole to complete the connection between the second gear and the third gear.

[0030] Furthermore, the first gear and the second gear are connected to their respective composite rollers through a connecting shaft; wherein the second gear is connected to the corresponding connecting shaft through a tension sleeve; an annular boss is provided on the side of the second gear facing the third gear, and the third gear is rotatably sleeved on the annular boss.

[0031] Furthermore, the overall width of the second gear is greater than that of the third gear.

[0032] The utility model provides a glue-free composite printing system, which comprises:

[0033] The embossing assembly comprises a printing roller and a bottom roller close to each other, the printing roller is provided with printing protrusions for forming recessed portions on the surface of the base paper;

[0034] The composite assembly comprises a first composite roller and a second composite roller arranged opposite to each other, and composite protrusions are arranged on both composite rollers; a group of composite protrusions located at the composite position are inserted into the corresponding recessed parts, and the composite areas at the bottom of the two recessed parts are intertwined with each other under the pressure of the composite protrusions to form a non-gel composite;

[0035] Among them, the top surface spacing between the two composite protrusions located at the composite position is 0.04mm-0.25mm.

[0036] Furthermore, the embossing components are provided in two groups, and the printing rollers of the two groups of embossing components constitute the composite component.

[0037] Furthermore, the height of the composite protrusion is greater than the printed protrusion, and protrusions of different heights form a high and low pattern on the surface of the original paper.

[0038] Furthermore, the composite protrusion and the printed protrusion are the same protrusion, and the bottoms of all the recessed parts formed by the protrusion on the original paper are all laminated without glue.

[0039] Furthermore, the width of the top pressing surface of the composite protrusion is 0.3-1.2 mm.

[0040] Furthermore, a group of composite protrusions are located at the composite position and correspond to each other, and the ratio of the width of the top pressing surface of one composite protrusion to the width of the top pressing surface of another composite protrusion is 1:(1-2).

[0041] Furthermore, a group of composite protrusions are located at the composite position and correspond to each other, and the ratio of the width of the top pressing surface of one composite protrusion to the width of the top pressing surface of another composite protrusion is 1:(1.2-1.5).

[0042] Furthermore, the height of the composite protrusion is 0.2mm-1.5mm.

[0043] The utility model provides a non-glue composite printing method, which is characterized by comprising the following steps:

[0044] S1, a recessed portion is formed on the surface of the base paper by an embossing assembly, and the bottom of the recessed portion is a composite area;

[0045] S2, a pair of composite protrusions on the composite roller group presses the composite area of ​​the two papers, so that the composite areas are intertwined with each other under pressure to form a non-glue composite;

[0046] S3. The paper products after glue-free lamination are continuously transported to the next process.

[0047] Furthermore, the roller body for forming the recessed portion on the paper and the roller body for pressing and laminating the laminating area are the same roller body.

[0048] Furthermore, the compounding roller group performs glue-free compounding on some of the recessed portions on the paper, or performs glue-free compounding on all the recessed portions.

[0049] Furthermore, before printing, the area of ​​the base paper wrapped on the bottom roller of the embossing assembly is not less than 1 / 4 of the entire circumference of the bottom roller.

[0050] Furthermore, the contact surface between the printed base paper and the composite roller is located in the upper area of ​​the composite roller itself.

[0051] Furthermore, when the position of the composite protrusion needs to be calibrated or the gap between gears needs to be eliminated,

[0052] First, release the locking relationship between the second gear and the third gear of the adjustment assembly;

[0053] Then, the second gear or the third gear is rotated until the total teeth formed by the teeth on the second gear and the third gear are meshed with the tooth grooves of the first gear of the adjustment assembly without gap; and it is ensured that at least part of the pressing surfaces of the pair of composite protrusions located at the composite position overlap with each other;

[0054] Finally, lock the third gear and the second gear.

[0055] 3. Beneficial effects

[0056] Compared with the prior art, the beneficial effects of the utility model are:

[0057] (1) The utility model provides a glue-free composite printing system, which not only realizes glue-free composite printing and avoids the disadvantages of gluing composite through the mutual cooperation of embossing components and composite components; at the same time, through the mutual cooperation of composite protrusions and corresponding recessed parts on the original paper, the integrity of the printing texture is guaranteed to the greatest extent.

[0058] (2) The utility model provides a glue-free composite printing system, wherein the first composite roller and the second composite roller are printing rollers in two embossing assemblies respectively. By arranging that the embossing assembly and the composite assembly share part of the roller body, not only the installation and debugging operation of the entire printing system becomes convenient and quick, and the printing effect is guaranteed; in addition, the number of rollers and corresponding drive sources is saved, which is conducive to reducing equipment investment costs and installation space.

[0059] (3) The glue-free composite printing system of the utility model can eliminate the damage to the embossed pattern caused by the tooth gap by adjusting the setting of the components, and further ensure the clarity of the embossed texture. At the same time, the composite protrusions on the two composite rollers are formed by a large and a small combination, so that there is a certain error tolerance space between the two composite protrusions. In the adjustment process of eliminating the tooth gap, as long as the tooth gap does not exceed the above-mentioned error tolerance space, there is no need to recalibrate the composite protrusion. This greatly simplifies the operation process of eliminating the tooth gap and does not affect the overall composite printing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0060] Figure 1 This is a schematic diagram of the overall structure of a glue-free composite printing system of the utility model;

[0061] Figure 2 It is a schematic diagram of a combination of the embossing component and the composite component in the utility model;

[0062] Figure 3 It is a schematic diagram of another combination of the embossing component and the composite component in the utility model;

[0063] Figure 4 It is a partial schematic diagram of the finished paper after being pressed and compounded by the same compound protrusions in the utility model;

[0064] Figure 5 It is a partial schematic diagram of the finished paper after being pressed and compounded by different compound protrusions in the utility model;

[0065] Figure 6 It is a structural schematic diagram of the adjustment component in the utility model;

[0066] Figure 7 This is a schematic diagram of the structure of the adjustment component in the utility model when the gears are in meshing state;

[0067] Figure 8 This is a schematic diagram of the structure of the second gear in the utility model;

[0068] Fig. 9 It is a schematic diagram of the assembly between the second gear and the third gear in the utility model;

[0069] In the figure: 1, embossing assembly; 12, bottom roller;

[0070] 2. Composite assembly; 21. First composite roller; 22. Second composite roller;

[0071] 3. Adjustment assembly; 31. First gear; 32. Second gear; 321. First mounting hole; 33. Third gear; 331. Second mounting hole; 34. Annular boss;

[0072] 41. First base paper; 42. Second base paper; 43. Recessed portion; 44. Composite region. DETAILED DESCRIPTION

[0073] In order to further understand the content of the utility model, the utility model is described in detail in conjunction with the accompanying drawings.

[0074] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0075] The utility model is further described below in conjunction with specific embodiments.

[0076] Example 1

[0077] refer to Figure 1 As shown, a glue-free composite printing system of this embodiment includes an embossing component 1 and a composite component 2.

[0078] The embossing assembly 1 is used to emboss texture patterns on the original paper.

[0079] The composite component 2 is used to compress and composite two sheets of base paper with texture patterns, so that the two sheets of base paper are in a "glued" state at the concave parts corresponding to the texture patterns.

[0080] Specifically, refer to Figure 2 , Figure 4 As shown, the embossing assembly 1 is provided with two groups, which include a printing roller and a bottom roller 12 close to each other. Among them, the printing roller is provided with a plurality of printing protrusions, and the bottom roller 12 is preferably a rubber roller.

[0081] Through the cooperation between the printing protrusions on the printing roller and the rubber roller, a series of recessed parts 43 are formed on the surface of the base paper to form a texture pattern of a specific shape. The bottom of the recessed part 43 is a composite area 44 for the base paper to be pressed and composited later. And among all the recessed parts 43 formed by the printing protrusions, at least part of them can cooperate with the composite protrusions on the composite roller for the glue-free composite between base papers.

[0082] The composite component 2 includes a first composite roller 21 and a second composite roller 22 which are arranged opposite to each other. The first composite roller 21 and the second composite roller 22 are both provided with a plurality of composite protrusions, and the composite protrusions on the two composite rollers overlap at least partially at the composite position to ensure that they can be pressed in the composite area 44 of the original paper.

[0083] It should be noted that the "compound position" here means that when the composite protrusions rotate with their respective composite rollers to a certain point, the gap between a pair of composite protrusions on different composite rollers is the smallest, and the composite area 44 is pressed and composited here, which is the composite position.

[0084] At the same time, it is worth noting that the “partial area overlap” here actually means that the indentations of a pair of composite protrusions on the corresponding composite area 44 have a certain overlapping portion.

[0085] In addition, in order to prevent the composite protrusion from interfering with the shape of the recessed portion 43 on the base paper during the lamination process, thereby affecting the overall texture.

[0086] Preferably, the composite protrusion and the corresponding recessed portion 43 on the paper are complementary to each other, so that the composite protrusion can just fit into the corresponding recessed portion 43, thereby not changing the shape of the recessed portion 43, thereby ensuring the integrity of the texture.

[0087] In the glue-free composite printing system of this embodiment, the gap between the top surfaces of a pair of composite protrusions at the composite position is 0.02mm-0.25mm, such as 0.04mm, 0.10mm, 0.16mm, 0.20mm, etc. The setting of the gap not only enables the original paper to be pressed tightly in the composite area 44 to achieve glue-free composite, but also ensures that the original paper will not be torn during the pressing.

[0088] At the same time, in order to ensure the effective pressing area to ensure the connection strength between the papers, the width of the top pressing surface of the composite protrusion is 0.3-1.2 mm, preferably 0.5-1.0 mm, for example, 0.4 mm, 0.6 mm, 0.8 mm, etc.

[0089] The working principle and process of a non-glue composite printing system of this embodiment are as follows:

[0090] The first base paper 41 and the second base paper 42 are respectively placed between the printing roller and the bottom roller 12 of the corresponding embossing assembly 1, and the surface of the base paper is pressed by the printing protrusions on the printing roller to form a series of recessed portions 43, and the bottom of the recessed portion 43 is a composite area 44.

[0091] The base paper with the recessed portion 43 is continuously conveyed between the first composite roller 21 and the second composite roller 22; at this time, the composite protrusion on each composite roller just fits into the recessed portion 43 of the corresponding base paper, and the composite protrusions on the two composite rollers correspond to each other; the composite areas 44 of the two layers of base paper are interwoven with each other under the pressure of the composite protrusions to form a non-gelled composite.

[0092] Finally, the paper products after glue-free lamination are transported to the next process.

[0093] As an implementation method of this embodiment, Figure 2 As shown, the first composite roller 21 and the second composite roller 22 are respectively the embossing rollers in the two groups of embossing components 1. That is, the embossing rollers of the two groups of embossing components 1 form the composite component 2.

[0094] That is to say, the bottom roller 12 and the first composite roller 21 form one embossing assembly 1, the other bottom roller 12 and the second composite roller 22 form another embossing assembly 1; and the first composite roller 21 and the second composite roller 22 form a composite assembly 2.

[0095] At this time, the same composite roller has both composite protrusions and printed protrusions. To ensure that the composite protrusions and the printed protrusions do not interfere with each other, the height of the composite protrusions (the distance protruding from the roller surface) is not less than the printed protrusions.

[0096] When the height of the composite protrusion is greater than that of the printed protrusion, the original paper is only laminated without glue at the concave portion 43 pressed by the composite protrusion, while the concave portion 43 pressed by the printed protrusion is not laminated. In this case, since the depths of the concave portions 43 pressed by the composite protrusion and the printed protrusion are different, the laminated paper towel can present a high and low pattern.

[0097] When the height of the composite protrusion is consistent with the printed protrusion, at this time, there is actually only one kind of protrusion on the composite roller, which first forms a recessed portion 43 on the base paper, and then presses and composites the composite area 44 at the composite position. In this way, the base paper is composited without glue at each recessed portion 43, thereby improving the connection strength between the base papers.

[0098] In the glue-free composite printing system of this embodiment, a first base paper 41 is formed with a recessed portion 43 after the bottom roller 12 and the first composite roller 21 cooperate with each other; a second base paper 42 is formed with a recessed portion 43 after the other bottom roller 12 and the second composite roller 22 cooperate with each other; then, the two base papers are pressed and composited between the first composite roller 21 and the second composite roller 22.

[0099] Since the first composite roller 21, the second composite roller 22 and the corresponding printing roller are the same roller body, the composite protrusions on the composite roller must be mutually matched and engaged with the recessed portion 43 on the base paper. Subsequently, the printed base paper will enter the composite position synchronously with the respective composite rollers for pressing and laminating. At this time, it is only necessary to ensure that the pair of composite protrusions on the first composite roller 21 and the second composite roller 22 that move to the composite position correspond to each other, so as to ensure that the composite areas 44 of the two base papers correspond to each other when the two base papers are pressed and laminated.

[0100] The glue-free composite printing system of the present embodiment not only realizes glue-free composite printing and avoids the disadvantages of glue composite printing, but also ensures the clarity of the embossed texture through the cooperation between the embossing component 1 and the composite component 2.

[0101] In addition, by setting up the embossing component 1 and the composite component 2 to share part of the roller body, not only the installation and debugging operation of the entire printing system becomes convenient and quick, ensuring the printing effect; in addition, it also saves the number of rollers and corresponding drive sources, which is conducive to reducing equipment investment costs and installation space.

[0102] Example 2

[0103] Due to the machining accuracy and normal wear of the workpiece, there will be a certain gap between the active gear and the passive gear. The existence of the gap will cause the gear to shake during the transmission process, making the contact of the composite protrusions on the two composite rollers unstable, which is easy to damage the embossed texture on the original paper and affect the final composite printing effect.

[0104] To this end, an adjustment component 3 is also provided in this embodiment to eliminate the meshing clearance between the gears and facilitate the calibration operation of the composite protrusions on the two composite rollers.

[0105] like Figure 1 As shown, the adjustment component 3 includes a first gear 31 and a second gear 32 for driving the first composite roller 21 and the second composite roller 22 respectively; wherein the second gear 32 can be rotated and adjusted relative to the second composite roller 22, so that when the two gears are meshed, the composite protrusions at the composite positions on the two composite rollers correspond to each other.

[0106] Specifically, refer to Figure 6 , Figure 7As shown, the adjustment assembly 3 further includes a third gear 33 coaxially arranged with the second gear 32 , and the third gear 33 is driven to rotate by the second gear 32 .

[0107] The first gear 31 is connected to the first composite roller 21 via a connecting shaft; the second gear 32 is connected to the second composite roller 22 via a connecting shaft.

[0108] The teeth on the second gear 32 and the third gear 33 correspond to each other to form a total tooth, and the second gear 32 and the third gear 33 are meshed with the first gear 31 without gap through the total tooth (refer to Figure 7 ).

[0109] In order to ensure that the actual width of the total teeth after the second gear 32 and the third gear 33 are combined can be adjusted to ensure gapless meshing in different states, the second gear 32 and the third gear 33 should be able to rotate relative to each other in the circumferential direction to change the misalignment angle between the two teeth to meet the gapless meshing requirements in different states.

[0110] Of course, there are many ways to realize the second gear 32 and the third gear 33. Figure 8 , Fig. 9 The second gear 32 is provided with an annular boss 34 on one side facing the third gear 33 , and the third gear 33 is rotatably sleeved on the annular boss 34 .

[0111] The toothed disc of the second gear 32 is provided with a plurality of first mounting holes 321 arranged circumferentially with the center thereof as the center; the toothed disc of the third gear 33 is provided with a plurality of second mounting holes 331 arranged circumferentially with the center thereof as the center, corresponding to the first mounting holes 321. The second mounting holes 331 are waist-shaped holes to facilitate misalignment adjustment of the two gears.

[0112] The fastener passes through the first mounting hole 321 and the second mounting hole 331 to complete the connection work of the second gear 32 and the third gear 33. When working, the fastener needs to be loosened first, the third gear 33 is rotated, and the misalignment angle between the second gear 32 and the third gear 33 is adjusted so that the two sides of the total tooth are respectively close to the two side walls of the corresponding tooth groove on the first gear 31 to achieve gapless meshing, and then the second gear 32 and the third gear 33 are locked by the fastener to achieve gapless meshing between the gears.

[0113] Preferably, the fasteners are bolts and nuts that fit together. Five first mounting holes 321 and five second mounting holes 331 are provided.

[0114] Traditionally, the gears and connecting shafts are often connected by keyways. However, in this embodiment, it is necessary to first ensure that the composite protrusions on the two composite rollers correspond to each other, and then position and lock the gears. In order to ensure that the meshing relationship between the two gears can be ensured after the gears are connected to the connecting shaft through the keyways on the basis of the mutual correspondence of the composite protrusions, it is necessary to process multiple keyways at different positions to meet the installation requirements. This not only increases the difficulty of equipment processing, but also makes the entire installation and adjustment operation relatively cumbersome.

[0115] To this end, in this embodiment, the second gear 32 is connected to the corresponding connecting shaft via a tension sleeve. During the installation operation, when the composite protrusions on the two composite rollers are aligned, the second gear 32 can be axially infinitely adjusted, thereby making the calibration operation of the composite protrusions more convenient and quick.

[0116] The glue-free composite printing system of the present embodiment can adjust the setting of the component 3 to facilitate the calibration and alignment of the composite protrusions while eliminating the damage to the embossed pattern caused by the tooth gap, thereby further ensuring the clarity of the embossed texture.

[0117] Example 3

[0118] In the above embodiment, after the positional relationship of the corresponding composite protrusions on the two composite rollers and the misalignment relationship between the second gear 32 and the third gear 33 are adjusted, the entire composite printing system is in a state of "composite protrusion against composite protrusion" and "gapless meshing", which is also the best working state of the entire composite printing system.

[0119] However, as the working time goes by, some wear and tear will inevitably occur between the gears, resulting in the reappearance of tooth gaps, which in turn affects the effect of the composite printing. Although the adjustment component 3 in the above embodiment can eliminate the tooth gap again, and the partial area overlap of the composite protrusions makes the alignment between the composite protrusions have a certain fault tolerance space. However, due to the small width value of the pressing surface of the composite protrusion, such a small fault tolerance space does not have a significant effect on the actual fault tolerance effect. When the tooth gap to be eliminated is larger than the fault tolerance space, it is necessary to release the locking relationship between the second gear 32 and the connecting shaft again, and then perform the composite protrusion calibration and gapless meshing adjustment operations. The adjustment process is still relatively cumbersome.

[0120] To this end, in a glue-free composite printing system implemented in this embodiment, the sizes of the composite protrusions on the two composite rollers are optimized on the basis of the above embodiments to simplify the operation of eliminating the tooth gap without affecting the overall composite printing effect.

[0121] refer to Figure 5As shown, a group of composite protrusions corresponding to each other are located at the composite position, the width of the top pressing surface of one of them is L1, and the width of the top pressing surface of the other is L2. Among them, L1 is 1-2 times of L2.

[0122] It is worth noting that the width here refers to the distance occupied by the top of a single composite protrusion in the circumferential direction of the roller body, while L1 and L2 are actually the indentations on the paper in the width direction of the pressed surface of the corresponding composite protrusion.

[0123] When L1=L2, the two composite protrusions are partially overlapped, that is, their respective center lines have a certain offset. Although this can provide the two composite protrusions with a certain tolerance space, the tolerance space is relatively small. At the same time, if the overlapping portion between the two composite protrusions is small, the effective pressing area of ​​the composite area 44 will be reduced, which is not conducive to the composite effect between the papers.

[0124] When L1>L2, even if there is a certain misalignment at the centers of the two composite protrusions, as long as the pressing surface of the smaller composite protrusion can fall completely on the pressing surface of the larger composite protrusion, the composite effect can be guaranteed, and there is also a certain margin for error.

[0125] That is, through the cooperation between the large and small composite protrusions, a larger error tolerance space is provided between the two composite protrusions. In the adjustment process of eliminating the tooth gap, as long as the tooth gap does not exceed the above error tolerance space, there is no need to recalibrate the composite protrusion. This greatly simplifies the operation process of eliminating the tooth gap without affecting the overall composite printing effect.

[0126] Furthermore, the width of the pressed surface of one composite protrusion is 1.1-1.5 times that of the other, for example, 1.3 times, 1.4 times, etc. This is because if the ratio between L1 and L2 is too small, the error tolerance effect between the large and small composite protrusions is not obvious. A larger ratio will naturally improve the error tolerance effect between the large and small composite protrusions. However, this will cause the recessed portions 43 on different base papers to differ too much, resulting in a significant difference in the roughness of the two sides of the composite finished paper, thereby affecting the user experience.

[0127] Specifically in this embodiment, the composite protrusion is in the shape of a truncated cone. Of course, the specific shape of the composite protrusion can also be replaced by other shapes, which are not listed one by one here.

[0128] In the present embodiment, a non-glue composite printing system, the specific steps of the tooth gap elimination operation are as follows:

[0129] Release the locking relationship between the second gear 32 and the third gear 33;

[0130] The teeth on the second gear 32 and the third gear 33 are staggered to appropriate positions, so that the two sides of the formed total teeth are respectively in close contact with the two side walls of the corresponding tooth grooves on the first gear 31;

[0131] At this time, since the locking relationship between the second gear 32 and the corresponding composite roller connecting shaft has not been released, the rotation of the second gear 32 will drive the composite roller and the composite protrusion thereon to rotate, thereby causing the composite protrusions on the two composite rollers to be misaligned; but since the composite protrusions on the two composite rollers are arranged in a large and a small configuration, there is a certain amount of misalignment space, which can still ensure that the pressing surface of the small composite protrusion falls completely on the pressing surface of the large composite protrusion, without affecting the overall pressing effect.

[0132] At the same time, it should be noted that when the adjustment gap distance between the gears exceeds the maximum tolerance space, it is necessary to re-calibrate the compound protrusion. The specific operation is as follows:

[0133] First, loosen the locking relationship between the second gear 32 and the corresponding composite roller connecting shaft, and between the second gear 32 and the third gear 33;

[0134] Then, the composite protrusions on the two composite rollers are adjusted to corresponding states;

[0135] Next, the teeth on the second gear 32 and the third gear 33 are staggered so that the two sides of the formed total teeth are respectively in close contact with the two side walls of the corresponding tooth grooves on the first gear 31 to achieve gapless meshing;

[0136] Finally, the second gear 32 and the third gear 33 are locked, and the second gear 32 and the corresponding composite roller connecting shaft are locked.

[0137] Example 4

[0138] In actual use, it is found that if there are defects in the flatness of the original paper before it enters the embossing component 1 for printing, it will affect the printing effect; and before the printed original paper enters the compounding component 2 for compounding, due to the small area of ​​the compounding protrusions, the recessed part 43 of the paper and the compounding protrusions on the compounding roller are easily separated, which will also interfere with the previous printing texture during the pressing and compounding process.

[0139] In order to solve the above problems, a glue-free composite printing system of this embodiment further optimizes the relative positions between the rollers of the embossing component 1 and the composite component 2 and the position where the base paper enters the embossing component 1.

[0140] Specifically, refer to Figure 3As shown, the first composite roller 21 and the second composite roller 22 are arranged horizontally, and the central axes of the two are located in the same horizontal plane. The tangent point between the bottom roller 12 of one embossing assembly 1 and the first composite roller 21 is located in the upper half of the first composite roller 21. The tangent point between the bottom roller 12 of another embossing assembly 1 and the second composite roller 22 is located in the upper half of the second composite roller 22.

[0141] That is to say, the area X2 of the base paper from the printing starting point to the composite position covered on the composite roller is located in the upper half of the entire composite roller.

[0142] It is worth mentioning that the tangent point between the bottom roller and the composite roller actually refers to the contact point between the printed protrusion on the composite roller and the bottom roller. The upper half of the composite roller refers to the area above the horizontal plane at the center of the roller body, that is, Figure 3 The middle dashed line and the area above it.

[0143] A glue-free composite printing system of the present embodiment sets the relative positions of the rollers of the embossing component 1 and the composite component 2 so that before the original paper after being printed by the bottom roller 12 and the composite roller enters the composite component 2, the recessed portion 43 of the original paper and the composite protrusion on the composite roller are always kept in a fitted state, so that it can smoothly enter the composite component 2, and the interference to the final printing effect caused by the re-reset of the recessed portion 43 and the composite protrusion after separation can be effectively eliminated.

[0144] In addition, the arc length between the initial contact position between the base paper and the bottom roller 12 and the starting point of printing should not be less than 1 / 4 of the circumference of the bottom roller 12 in the circumferential direction.

[0145] That is to say, the area X1 where the base paper is wrapped on the bottom roller 12 is not less than 1 / 4 of the circumference of the entire bottom roller 12. Before the base paper enters the embossing assembly 1, the flatness of the base paper can be improved by adjusting the tightness of the fit between the base paper and the bottom roller 12.

[0146] A glue-free composite printing system of the present embodiment adjusts the position where the base paper enters the embossing assembly 1 so that the base paper can have a sufficient wrapping length with the bottom roller 12 before entering the embossing assembly 1 for printing, so that the flatness of the base paper can be adjusted by using the wrapping length of this part to ensure the printing effect.

[0147] Example 5

[0148] This embodiment provides a glue-free composite printing method, which includes the following steps:

[0149] S1, a recessed portion 43 is formed on the surface of the base paper by the embossing assembly 1, and the bottom of the recessed portion 43 is a composite area 44;

[0150] S2, a pair of composite protrusions on the composite roller group presses the composite area 44 of the two papers, so that the composite area 44 is intertwined with each other under pressure to form a non-gel composite;

[0151] S3. The paper products after glue-free lamination are continuously transported to the next process.

[0152] When the position of the compound protrusion needs to be calibrated or the clearance between gears needs to be eliminated,

[0153] First, release the locking relationship between the second gear 32 and the third gear 33 of the adjustment assembly 3;

[0154] Then, the second gear 32 or the third gear 33 is rotated so that the teeth on the two gears are offset from each other, until the total teeth formed by the teeth on the second gear 32 and the third gear 33 are meshed with the tooth grooves of the first gear 31 of the adjustment assembly 3 without gap; and it is ensured that at least part of the pressing surfaces of the pair of composite protrusions located at the composite position overlap with each other;

[0155] Next, the third gear 33 is locked onto the second gear 32 .

[0156] If the pair of composite protrusions at the composite position have no overlapped area when the main teeth mesh with the corresponding tooth grooves without clearance, the locking relationship between the second gear 32 and the corresponding composite roller connecting shaft should be loosened, and the composite protrusion calibration operation should be performed again. The specific operation is as follows:

[0157] First, loosen the locking relationship between the second gear 32 and the corresponding composite roller connecting shaft, and between the second gear 32 and the third gear 33;

[0158] Then, a pair of composite protrusions located at the composite positions on the two composite rollers are adjusted to a corresponding state;

[0159] Next, the teeth on the second gear 32 and the third gear 33 are staggered so that the two sides of the formed total teeth are respectively in close contact with the two side walls of the corresponding tooth grooves on the first gear 31 to achieve gapless meshing;

[0160] Finally, the second gear 32 and the third gear 33 are locked, and the second gear 32 and the corresponding composite roller connecting shaft are locked.

[0161] As an implementation method of this embodiment, the roller body on which the recessed portion 43 is formed on the paper and the roller body used for pressing and laminating the laminating area 44 are the same roller body.

[0162] At the same time, the compound roller group performs glue-free compounding on some of the recessed portions 43 on the paper, or all of the recessed portions 43 are subjected to glue-free compounding.

[0163] In the glue-free composite printing method of the present embodiment, before the printed original paper enters the composite component 2 for composite, the recessed portion 43 of the paper is easily separated from the pressing point on the composite roller, which will interfere with the previous printing texture during the pressing and composite process.

[0164] Therefore, in this embodiment, it is required that the contact surface between the printed base paper and the composite roller is located in the upper area of ​​the composite roller itself before the pressing and laminating, so as to eliminate the interference to the final printing effect caused by the resetting of the recessed part 43 and the pressing point after separation.

[0165] In addition, in order to eliminate the interference to the printing effect caused by the defects of paper flatness, the area of ​​the base paper wrapped on the bottom roller 12 is not less than 1 / 4 of the entire circumference of the bottom roller 12, so that the flatness of the base paper can be improved by adjusting the tightness of the fit between the base paper and the bottom roller 12.

[0166] It should be noted that the technical solutions of the above examples can be freely combined on the basis of no contradiction.

[0167] The above schematically describes the present invention and its implementation methods, which are not restrictive. The drawings show only one implementation method of the present invention, and the actual structure is not limited thereto. Therefore, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the present invention, they should all fall within the protection scope of the present invention.

Claims

1. A glue-free composite printing system, comprising an embossing assembly (1) for forming a series of recessed portions (43) on the surface of an original paper, characterized in that: Also includes, A composite component (2), the composite component (2) comprising a first composite roller (21) and a second composite roller (22) arranged opposite to each other, and composite protrusions respectively arranged on the two composite rollers, the composite protrusions being accommodated in corresponding recessed portions (43); composite areas (44) on the two papers are interwoven with each other under the pressure of the composite protrusions located at the composite position, thereby forming a non-glued composite; and an adjustment component (3), wherein the adjustment component (3) comprises a first gear (31) and a second gear (32) for driving the first composite roller (21) and the second composite roller (22) respectively; wherein the second gear (32) can be rotated and adjusted relative to the second composite roller (22), so that when the two gears are meshed, the composite protrusions located at the composite positions on the two composite rollers correspond to each other.

2. The adhesive-free composite printing system according to claim 1, characterized in that: The embossing assembly (1) is provided with two groups, which include a printing roller and a bottom roller (12) close to each other; wherein the printing roller is provided with a printing protrusion, and the printing protrusion forms the recessed portion (43) on the surface of the base paper; among all the recessed portions (43) formed by the printing protrusion, at least part of them can cooperate with the composite protrusion on the composite roller, and are used for glue-free composite between base paper sheets.

3. The glue-free composite printing system according to claim 2, characterized in that: The first composite roller (21) and the embossing roller of one group of embossing components (1) are the same roller body, and the second composite roller (22) and the embossing roller of another group of embossing components (1) are the same roller body.

4. A glue-free composite printing system according to any one of claims 1 to 3, characterized in that: A group of composite protrusions on the two composite rollers located at the composite position have at least a partial overlap of the pressing surfaces at the top thereof.

5. The glue-free composite printing system according to claim 4, characterized in that: The widths of the top pressing surfaces of a group of mutually corresponding composite protrusions on the first composite roller (21) and the second composite roller (22) are arranged to be larger and smaller.

6. The glue-free composite printing system according to claim 5, characterized in that: A group of corresponding composite protrusions are provided, wherein the width of the pressing surface of one composite protrusion is 1.1-2.0 times that of the other composite protrusion.

7. The glue-free composite printing system according to claim 4, characterized in that: The width of the pressing surface of the composite protrusion is 0.5-1.0 mm.

8. A glue-free composite printing system according to any one of claims 1 to 3, characterized in that: The gap between the top surfaces of a pair of composite protrusions located at the composite position is 0.02 mm-0.2 mm.

9. The glue-free composite printing system according to claim 2 or 3, characterized in that: The height of the composite protrusion is not less than the height of the printed protrusion, and the protrusions of different heights form a high and low pattern on the surface of the original paper; or, The composite protrusion and the printed protrusion are the same protrusion, and all the recessed parts (43) formed by the protrusion on the original paper are subjected to glue-free composite at the composite area (44).

10. A glue-free composite printing system according to any one of claims 1 to 3, characterized in that: The adjustment assembly (3) further comprises a third gear (33) coaxially arranged with the second gear (32), wherein the teeth on the second gear (32) and the third gear (33) correspond to each other to form a total tooth. The second gear (32) and the third gear (33) are meshed with the first gear (31) without clearance through the total teeth, and the second gear (32) and the third gear (33) can perform circumferential relative motion.

11. The glue-free composite printing system according to claim 10, characterized in that: The second gear (32) and the third gear (33) are respectively provided with an axial first mounting hole (321) and a second mounting hole (331); wherein the second mounting hole (331) is a waist-shaped hole, and a fastener passes through the first mounting hole (321) and the second mounting hole (331) to complete the connection between the second gear (32) and the third gear (33).

12. The glue-free composite printing system according to claim 11, characterized in that: The first gear (31) and the second gear (32) are both connected to their respective composite rollers via a connecting shaft; wherein the second gear (32) is connected to the corresponding connecting shaft via a tension sleeve; an annular boss (34) is provided on the side of the second gear (32) facing the third gear (33), and the third gear (33) is rotatably sleeved on the annular boss (34).

13. The glue-free composite printing system according to claim 11, characterized in that: The overall width of the second gear (32) is greater than that of the third gear (33).

14. A glue-free composite printing system, characterized in that: include, An embossing assembly (1) comprises a printing roller and a bottom roller (12) close to each other, wherein the printing roller is provided with printing protrusions for forming a recessed portion (43) on the surface of the original paper; A composite component (2), the composite component (2) comprising a first composite roller (21) and a second composite roller (22) arranged opposite to each other, both composite rollers being provided with composite protrusions; a group of composite protrusions located at the composite position are inserted into corresponding recessed portions (43), and composite areas (44) at the bottom of the two recessed portions (43) are intertwined with each other under the pressure of the composite protrusions to form a non-gel composite; Among them, the top surface spacing between the two composite protrusions located at the composite position is 0.04mm-0.25mm.

15. The glue-free composite printing system according to claim 14, characterized in that: The embossing components (1) are provided in two groups, and the printing rollers of the two groups of embossing components (1) form the composite component (2).

16. A glue-free composite printing system according to claim 14 or 15, characterized in that: The height of the composite protrusion is greater than the printed protrusion, and the protrusions of different heights form a high and low pattern on the surface of the original paper; or The composite protrusion and the printed protrusion are the same protrusion, and the bottoms of all the recessed parts (43) formed by the protrusion on the original paper are all composited without glue.

17. The glue-free composite printing system according to claim 16, characterized in that: The width of the top pressing surface of the composite protrusion is 0.3-1.2 mm.

18. The glue-free composite printing system according to claim 17, characterized in that: A group of composite protrusions are located at the composite position and correspond to each other, wherein the ratio of the width of the top pressing surface of one composite protrusion to the width of the top pressing surface of another composite protrusion is 1:(1-2).

19. The glue-free composite printing system according to claim 18, characterized in that: The height of the composite protrusion is 0.2mm-1.5mm.

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