Embossing composite roller set

Abstract

The utility model discloses an embossing composite roller set, which comprises a main roller and at least two groups of auxiliary rollers which are circumferentially staggered and tightly clung to the roller surface of the main roller, a preset paper web sequentially penetrates through a roller surface gap between the main roller and each auxiliary roller to be subjected to counter-pressing treatment, at least one negative pressure suction section is arranged on the roller surface of the main roller, and the negative pressure suction section is arranged on the roller surface of the main roller. Any negative pressure suction section periodically rotates into an axial surface area between any two adjacent auxiliary rollers along with the rotation of the main roller to apply a negative pressure effect on the paper web, so that the paper web is tightly attached to the roller surface of the main roller; the method has the advantages of low cost, low manufacturing and processing difficulty, more stable and reliable texture pattern formation and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of household paper processing equipment, in particular to an embossing composite roller group. Background Art

[0002] In the field of household paper, traditional embossing equipment generally consists of a pair of oppositely rotating flower rollers and auxiliary rollers, wherein the diameter and width between the auxiliary roller and the flower roller are consistent, and an external pressure device (such as a large hydraulic press) is used to apply force to the auxiliary roller so that it cooperates with the flower roller for mechanical interlayer pressure, thereby forming the required texture pattern on the surface of the paper web. This method has the following disadvantages: 1) The requirements for the external pressure device are relatively high, and sufficient and accurate pressure force needs to be generated. If the force is too large, the paper web will be crushed. On the contrary, if the force is too small, the formed texture pattern will be unclear; 2) The processing accuracy requirements for the auxiliary roller and the flower roller are high, and the roller surface needs to ensure a certain flatness and sufficient rigidity, otherwise it is easy to cause problems such as local overpressure or no pressure; 3) Due to the large pressure force, the concave and convex texture of the auxiliary roller surface is severely worn, the service life is limited, and the replacement cost is high. In view of the above disadvantages, there is an urgent need for an embossing composite equipment with low force requirements, relatively low processing accuracy requirements, and stable and reliable texture patterns. Utility Model Content

[0003] The utility model aims to overcome the shortcomings of the prior art and provide a low-cost, stable and reliable embossing composite roller group.

[0004] In order to achieve the above-mentioned purpose, the utility model provides an embossing composite roller group, including a main roller, and at least two groups of auxiliary rollers that are circumferentially offset and close to the roller surface of the main roller. The preset paper web passes through the roller surface gap between the main roller and each auxiliary roller in turn for counter pressure treatment. The roller surface of the main roller is provided with at least one negative pressure suction section. Any of the negative pressure suction sections rotates periodically with the rotation of the main roller to the axial surface area between any two adjacent groups of auxiliary rollers to apply negative pressure to the paper web so that the paper web remains in contact with the roller surface of the main roller.

[0005] Further, each of the auxiliary rollers includes a plurality of first auxiliary roller units that are coaxially arranged at intervals.

[0006] Furthermore, each of the auxiliary rollers is a single axially extending second auxiliary roller unit.

[0007] Furthermore, it also includes an embossing roller close to the roller surface of the main roller and located downstream of each auxiliary roller, wherein the paper web passes through the roller surface gap between the main roller and the embossing roller for counter-pressing treatment after being subjected to multiple counter-pressing treatments by the main roller and each auxiliary roller.

[0008] Furthermore, the main roller is formed with at least one axially extending suction air duct in each negative pressure suction section, and at least one suction air hole extending to the roller surface of the main roller is led out from each suction air duct; the roller surface of any of the auxiliary rollers is formed with a plurality of concave and convex textures that are periodically pressed against the roller surface of the main roller, wherein during the period of pressing between the main roller and any of the auxiliary rollers, any of the suction air holes avoids each of the concave and convex textures.

[0009] Furthermore, the texture patterns formed by the pressing of the paper web by the auxiliary rollers of each group and the main rollers are completely overlapped, partially overlapped, or not overlapped at all.

[0010] Further, the diameter width of the first auxiliary roller unit is equal to or smaller than the diameter width of the main roller.

[0011] Furthermore, the diameter width of the second auxiliary roller unit is equal to or smaller than the diameter width of the main roller.

[0012] Furthermore, the diameter width of the embossing roller is equal to the diameter width of the main roller.

[0013] The utility model adopts the above scheme, and its beneficial effects are: 1) When the paper web passes through the roller surface of the main roller, it is kept flat on the roller surface of the main roller by the negative pressure applied by the negative pressure suction section, thereby ensuring that each group of auxiliary rollers will not shift or other abnormal problems during the multiple pressure treatments on the paper web by cooperating with the main roller, which greatly ensures the stability and accuracy of the position of the texture pattern formation; 2) Each group of auxiliary rollers composed of multiple first auxiliary roller units arranged at intervals or a single axially extending second auxiliary roller unit will make the pressure force required for each group of auxiliary rollers smaller, the cost is lower, and the processing difficulty is lower. In general, the above-mentioned embossed composite roller group has the advantages of low cost, low manufacturing and processing difficulty, and more stable and reliable formation of texture patterns. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 Schematic diagram of the embossing composite roller group of Example 1.

[0015] Figure 2 This is a schematic diagram of the embossing composite roller group of implementation mode 1 in Example 1.

[0016] Figure 3 This is a schematic diagram of the embossing composite roller group of implementation mode 1 in Example 1.

[0017] Figure 4 for Figure 1 A partial enlarged view of the .

[0018] Figure 5 This is a schematic diagram of the embossing composite roller group of implementation mode 2 in embodiment 1.

[0019] Figure 6-8 Schematic diagram of other implementations of the total embossing composite roller group in the embodiment.

[0020] Fig. 9 This is a schematic diagram of the embossing composite roller group of Example 2.

[0021] Fig.10 Schematic diagram of a "four-side embossed" paper web prepared by the embossing composite roller set of Example 2.

[0022] Among them, 1-main roller, 2-auxiliary roller, 21-first auxiliary roller unit, 22-second auxiliary roller unit, 3-negative pressure suction section, 31-suction air channel, 32-suction air hole, 4-embossing roller, 5-first rubber roller, 6-second rubber roller, 100-paper web, 101-base paper. DETAILED DESCRIPTION

[0023] In order to facilitate the understanding of the present invention, the present invention is described more comprehensively with reference to the accompanying drawings. The accompanying drawings provide preferred embodiments of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. The purpose of providing these embodiments is to make the disclosure of the present invention more thoroughly and comprehensively understood. Example

[0024] See attached Figure 1 As shown in the embodiment, an embossing composite roller group includes a main roller 1 and at least two groups of auxiliary rollers 2 which are circumferentially offset and close to the roller surface of the main roller 1. Specifically, for the convenience of explanation, the attached Figure 1 For reference, the main roller 1 is defined to rotate in the clockwise direction, and correspondingly, each auxiliary roller 2 rotates counterclockwise, so that each group of auxiliary rollers 2 is pressed against the main roller 1 respectively, and a roller surface gap is formed between the roller surface of each group of auxiliary rollers 2 and the roller surface of the main roller 1 for the paper web 100 to pass through.

[0025] In this embodiment, a preset paper web 100 passes through the roller surface gaps between the main roller 1 and each auxiliary roller 2 in sequence for counter-pressure treatment, that is, the same paper web 100 continuously passes through the roller surface of the main roller 1 and passes through the roller surface gaps between the main roller 1 and each auxiliary roller 2 in sequence, and is subjected to a corresponding mechanical counter-pressure force each time it passes through a roller surface gap, so that the paper web 100 forms a corresponding desired texture pattern.

[0026] Furthermore, the paper web 100 of this embodiment is composed of at least two sheets of base paper stacked together and transferred to the roller surface of the main roller 1 .

[0027] Since the same paper web 100 continuously passes through the roller surface of the main roller 1 and is subjected to mechanical counterpressure from at least two groups of auxiliary rollers 2 cooperating with the main roller 1 at the same time, the paper web 100 may have problems such as positional displacement during the conveying process, which in turn may cause quality abnormalities such as misalignment and offset of the texture pattern formed by different counterpressure treatments. Therefore, in view of this problem, the roller surface of the main roller 1 of this embodiment is provided with at least one negative pressure suction section 3, and any of the negative pressure suction sections 3 rotates periodically with the rotation of the main roller 1 to the axial surface area between any two adjacent groups of auxiliary rollers 2 to apply negative pressure to the paper web 100 so that the paper web 100 remains in contact with the roller surface of the main roller 1, that is, the suction negative pressure generated by the negative pressure interval is used to keep the paper web 100 passing through the roller surface of the main roller 1 in a contact state, thereby ensuring that the paper web 100 will not shift during the period of mechanical counterpressure, and ensuring that the texture pattern formed by the paper web 100 can be accurately formed at the rated position.

[0028] For further information, see Appendix Figure 4 As shown, the main roller 1 of this embodiment is formed with at least one axially extending suction air channel 31 in each negative pressure suction section 3, and at least one suction air hole 32 extending to the roller surface of the main roller 1 is led out from each suction air channel 31. Specifically, one end or two sections of the suction air channel 31 extend to the end surface of the main roller 1 and are periodically connected with a preset suction device (not shown in the figure), so that the suction air channel 31 periodically generates a negative pressure effect, thereby allowing the suction air holes 32 to form a negative pressure effect in the roller surface area of ​​the main roller 1 for sucking the paper web 100.

[0029] In addition, the suction holes 32 led out from the same suction air duct 31 of the present embodiment are arranged at intervals along the axial direction, so that the suction holes 32 led out from the same suction air duct 31 form a negative pressure effect in the width direction of the paper web 100, thereby enhancing the effect of negative pressure adsorption, and further ensuring that the paper web 100 remains in contact with the roller surface of the main roller 1.

[0030] In this embodiment, a plurality of concave-convex textures are formed on the roller surface of any auxiliary roller 2, which are periodically pressed against the roller surface of the main roller 1. According to different requirements of the texture pattern, the main roller 1 can adopt a smooth steel roller structure, or a flower roller structure with concave and convex points, which is not specifically limited here. Accordingly, when the main roller 1 adopts a smooth steel roller structure, the concave-convex texture of the auxiliary roller 2 is pressed against the smooth surface of the main roller 1 (i.e., "point to surface"); when the main roller 1 adopts a flower roller structure with concave and convex points, the concave-convex texture of the auxiliary roller 2 is pressed against the concave and convex points of the main roller 1 (i.e., "point to point"). Those skilled in the art can choose as needed, which is not specifically limited here.

[0031] In addition, in order to prevent the suction holes 32 from interfering with the texture pattern formed on the paper web 100, during the period when the main roller 1 of this embodiment is pressed against any auxiliary roller 2, any suction hole 32 avoids various concave and convex textures, that is, the suction holes 32 act on the positions of the paper web 100 where no texture pattern needs to be formed. Those skilled in the art can adjust the positions of various suction holes 32 on the main roller 1 according to the actual pattern problem, and they only need to ensure that they avoid the concave and convex texture of the auxiliary roller 2.

[0032] In order to facilitate the pressure treatment between the auxiliary roller 2 and the main roller 1, further explanation is given below in conjunction with a specific implementation method.

[0033] Implementation method 1: See attached Figure 2 and 3 As shown, each group of auxiliary rollers 2 includes a plurality of first auxiliary roller units 21 coaxially arranged at intervals, that is, the texture pattern formed by the same group of auxiliary rollers 2 cooperating with the main roller 1 is formed by the plurality of first auxiliary roller units 21 of the same group pressing against the main roller 1 at the same time. The use of this split method can greatly reduce the pressing pressure required for the pressing treatment of a group of auxiliary rollers 2 cooperating with the main roller 1, and the processing difficulty and precision are relatively lower. The texture pattern formed between each first auxiliary roller unit 21 and the main roller 1 will be more stable, but the assembly difficulty will be relatively higher.

[0034] Further, in the first embodiment, the paper web 100 is kept in a flat state and will not shift due to the negative pressure of the negative pressure suction section 3. Therefore, according to different requirements of the texture pattern, the texture patterns formed by the pressure of each group of auxiliary rollers 2 and the main roller 1 on the paper web 100 are completely overlapped, partially overlapped, or completely non-overlapped. For details, see the attached Figure 3 As shown, when the texture pattern is required to be completely overlapped, the first auxiliary roller units 21 between the groups of auxiliary rollers 2 are required to overlap one by one in the axial direction of the main roller 1, and the concave and convex textures of the correspondingly overlapping first auxiliary roller units 21 are pressed against the main roller 1 at the same position of the paper web 100, so that the same texture pattern is formed by continuous pressing of multiple groups of auxiliary rollers 2, and a clearer and more beautiful effect is obtained. In addition, since the pressing pressure is relatively small, repeated pressing at the same position of the paper web 100 will not cause abnormal problems such as tearing and damage. See the attached Figure 2As shown, when the texture pattern to be formed is required to be partially overlapped, it is required that each first auxiliary roller unit 21 between each group of auxiliary rollers 2 is partially overlapped one by one relative to the axial direction of the main roller 1, and the corresponding overlapping concave-convex textures of each first auxiliary roller unit 21 are pressed against the main roller 1 at the same position of the paper web 100, and the non-overlapping concave-convex textures are pressed against the main roller 1 at the blank position of the paper web 100, which is suitable for the situation where the local pattern texture requirements are high; when the texture pattern to be formed is required to be completely non-overlapping, it is required that each first auxiliary roller unit 21 between each group of auxiliary rollers 2 is staggeredly arranged one by one relative to the axial direction of the main roller 1, so that the concave-convex textures of each first auxiliary roller unit 21 are pressed against the main roller 1 at different positions of the paper web 100.

[0035] Furthermore, in actual use, by adjusting the spacing positions between the first auxiliary roller units 21 of each group of auxiliary rollers 2, the above-mentioned three texture patterns can be adjusted, which is more flexible and suitable for more processing scenarios.

[0036] Implementation method 2: See attached Figure 5 As shown, each auxiliary roller 2 is a single axially extending second auxiliary roller unit 22, that is, the texture pattern formed by the auxiliary rollers 2 of the same group cooperating with the main roller 1 is formed by the second auxiliary roller unit 22 cooperating with the main roller 1 for single-roll pressing. The assembly difficulty will be relatively low in this way, but the pressing pressure required for the pressing process is greater, and the processing accuracy and cost are higher.

[0037] Furthermore, in the second embodiment, the position of the concave-convex texture of each group of auxiliary rollers 2 can be set accordingly according to the processing requirements of the texture pattern, so that the texture patterns formed by the pressure of each group of auxiliary rollers 2 and the main roller 1 are completely overlapped, partially overlapped, or completely non-overlapped, that is, by pre-adjusting the position of the concave-convex texture on the roller surface of the second auxiliary roller unit 22 of each group of auxiliary rollers 2, thereby changing the position of the concave-convex texture of the second auxiliary roller unit 22 and the main roller 1 pressing on the paper web 100, which can be completely overlapped, partially overlapped, or completely non-overlapped.

[0038] In summary, by using the auxiliary roller 2 of embodiment one or embodiment two to cooperate with the main roller 1 for counter-pressure treatment, texture patterns with different effects can be formed, and due to the negative pressure applied to the paper web 100 by the negative pressure suction section 3, the paper web 100 is kept in contact with the roller surface of the main roller 1 without displacement, offset and other abnormalities, thereby ensuring the accuracy and consistency of the position of the formed texture pattern.

[0039] In this embodiment, the diameter width of the first auxiliary roller unit 21 and the second auxiliary roller unit 22 in the above-mentioned embodiment 1 or embodiment 2 may be equal to or smaller than the diameter width of the main roller 1. Figure 1-5The first auxiliary roller unit 21 / the second auxiliary roller unit 22 shown in the figure are both smaller than the diameter of the main roller 1. In this way, the processing cost and precision requirements are lower, and a better pressing effect can be achieved, and the texture pattern formed is clearer and more stable. Figure 6-7 In other embodiments shown, the first auxiliary roller unit 21 / the second auxiliary roller unit 22 of one of the front groups of auxiliary rollers 2 is smaller than the diameter of the main roller 1, and the first auxiliary roller unit 21 / the second auxiliary roller unit 22 of the other rear group of auxiliary rollers 2 is equal to the diameter of the main roller 1. At this time, the front group of auxiliary rollers mainly plays a pre-pressing and compounding role, and the rear group of auxiliary rollers plays an embossing role.

[0040] Furthermore, in order to further enhance the texture effect, especially the double-sided embossing effect, the present embodiment further includes the following Figure 7 Another embodiment shown specifically includes a first rubber roller 5 which is closely attached to the roller surface of the auxiliary roller which is equal to the diameter of the main roller 1, and transfers the paper web after being pressed by the main roller and each group of auxiliary rollers to the roller surface gap between the roller surface of the first rubber roller 5 and the roller surface of the auxiliary roller 2 for embossing treatment, thereby forming a texture pattern on the other side of the paper web, and the pattern is richer.

[0041] Furthermore, this embodiment also includes the following Figure 8 In another embodiment shown, the first auxiliary roller unit 21 / second auxiliary roller unit 22 of one of the front auxiliary roller groups 2 is equal to the diameter of the main roller 1, and the first auxiliary roller unit 21 / second auxiliary roller unit 22 of the other rear auxiliary roller group 2 is smaller than the diameter of the main roller 1. At this time, the paper web 100 is divided into two paths of base paper 101, which respectively converge from the front auxiliary roller 2 and the main roller 1 at the roller surface gap between the roller surface of the main roller 1 and the roller surface of the auxiliary roller 2, and the front auxiliary roller 2 and the main roller 1 are both equipped with a second rubber roller 6 close to their respective roller surfaces. The two second rubber rollers cooperate with the main roller 1 and the auxiliary roller 2 to pre-emboss the two groups of base paper 101, and then perform a counter-pressing treatment through each group of auxiliary rollers 2 and the main roller 1. In this way, the texture pattern of the paper web can also be enriched.

[0042] Furthermore, the above Figure 7 and 8 In the illustrated embodiment, for the auxiliary roller 2 equipped with the first rubber roller 5 and the second rubber roller 6, in order to improve the embossing effect and accuracy, the auxiliary roller 2 may be equipped with at least one auxiliary roller suction section, and any auxiliary roller suction section rotates periodically with the rotation of the auxiliary roller 2 to the axial surface area between any two adjacent groups of auxiliary rollers 2 to apply negative pressure to the paper web 100 so that the paper web 100 remains attached to the roller surface of the auxiliary roller 2. The auxiliary roller suction section here can ensure that the paper web will not be displaced or offset on the auxiliary roller 2. Example

[0043] See attached Figure 6As shown, in this embodiment, the difference from the first embodiment is that it also includes an embossing roller 4 close to the roller surface of the main roller 1 and located downstream of each auxiliary roller 2, wherein the paper web 100 passes through the roller surface gap between the main roller 1 and the embossing roller 4 for counter-pressing treatment after being subjected to multiple counter-pressing treatments by the main roller 1 and each auxiliary roller 2.

[0044] Since the paper web 100 is kept in contact with the roller surface of the main roller 1 by the negative pressure applied by the negative pressure suction section 3, the original papers of the paper web 100 have been compounded together after being subjected to multiple pressing treatments by the main roller 1 and the auxiliary rollers 2, and then are transferred to the roller surface gap between the main roller 1 and the embossing roller 4 for pressing treatment, and can still keep in contact with and not shifted, thereby ensuring that the texture pattern formed by the pressing of the main roller 1 and the embossing roller 4 maintains accuracy and consistency.

[0045] Furthermore, the diameter width of the embossing roller 4 in this embodiment is equal to the diameter width of the main roller 1, wherein the roller surface of the embossing roller 4 is formed with a concave-convex texture for roller surface pressing treatment with the main roller 1, so that the concave-convex texture of the embossing roller 4 cooperates with the main roller 1 to achieve pressing treatment of the paper web 100.

[0046] In order to facilitate the understanding of the second embodiment, an explanation is given below in combination with a specific texture pattern.

[0047] Specifically, this embodiment is used to prepare Figure 7 The four-side embossed texture pattern shown in the figure, wherein each group of auxiliary rollers 2 is pressed against the main roller 1 to form a number of texture patterns extending along the conveying direction of the paper web 100, that is: the several texture patterns formed by the pressing of the auxiliary rollers 2 and the main roller 1 at this time are arranged at intervals along the wide direction of the paper web 100; the embossing roller 4 is pressed against the main roller 1 to form a number of texture patterns extending along the wide direction of the paper web 100, that is: the several texture patterns formed by the pressing of the embossing roller 4 and the main roller 1 at this time are arranged at intervals along the wide direction of the paper web 100; finally, the paper web 100 forms a "four-side embossed" texture pattern that is staggered vertically and longitudinally, and the texture patterns at the staggered positions at this time are completely overlapped or partially overlapped, and the texture patterns at the remaining positions are completely non-overlapping.

[0048] The embodiments described above are only preferred embodiments of the present invention and do not limit the present invention in any form. Any technician familiar with the field, without departing from the scope of the technical solution of the present invention, can make more possible changes and modifications to the technical solution of the present invention using the technical content disclosed above, or the modifications are equivalent embodiments of the present invention. Therefore, any equivalent and equivalent changes made according to the idea of ​​the present invention without departing from the content of the technical solution of the present invention should be included in the protection scope of the present invention.

Claims

1. An embossing composite roller group, comprising a main roller (1), and at least two groups of auxiliary rollers (2) circumferentially offset and close to the roller surface of the main roller (1), wherein a preset paper web (100) sequentially passes through the roller surface gap between the main roller (1) and each auxiliary roller (2) for counter-pressing treatment, characterized in that: The roller surface of the main roller (1) is provided with at least one negative pressure suction section (3), and any of the negative pressure suction sections (3) rotates periodically with the rotation of the main roller (1) to the axial surface area between any two groups of adjacent auxiliary rollers (2) to apply negative pressure to the paper web (100) so that the paper web (100) remains in contact with the roller surface of the main roller (1).

2. The embossing composite roller set according to claim 1, characterized in that: Each of the auxiliary rollers (2) comprises a plurality of first auxiliary roller units (21) that are coaxially arranged at intervals.

3. The embossing composite roller set according to claim 1, characterized in that: Each of the auxiliary rollers (2) is a single axially extending second auxiliary roller unit (22).

4. The embossing composite roller set according to claim 1, characterized in that: It also includes an embossing roller (4) which is close to the roller surface of the main roller (1) and is located downstream of each auxiliary roller (2), wherein the paper web (100) is subjected to multiple counter-pressing treatments by the main roller (1) and each auxiliary roller (2) and then passes through the roller surface gap between the main roller (1) and the embossing roller (4) for counter-pressing treatment.

5. The embossing composite roller set according to claim 1, characterized in that: The main roller (1) is formed with at least one axially extending suction air channel (31) in each negative pressure suction section (3), and at least one suction air hole (32) extending from each suction air channel (31) to the roller surface of the main roller (1); a plurality of concave-convex textures that are periodically pressed against the roller surface of the main roller (1) are formed on the roller surface of any of the auxiliary rollers (2), wherein during the period of pressing between the main roller (1) and any of the auxiliary rollers (2), any of the suction air holes (32) avoids each of the concave-convex textures.

6. The embossing composite roller set according to claim 2, characterized in that: The texture patterns formed by the pressing of the paper web (100) by the auxiliary rollers (2) of each group and the main rollers (1) are completely overlapped, partially overlapped, or completely non-overlapped.

7. The embossing composite roller set according to claim 2, characterized in that: The radial width of the first auxiliary roller unit (21) is equal to or smaller than the radial width of the main roller (1).

8. The embossing composite roller set according to claim 3, characterized in that: The diameter width of the second auxiliary roller unit (22) is equal to or smaller than the diameter width of the main roller (1).

9. The embossing composite roller assembly according to claim 4, characterized in that: The diameter width of the embossing roller (4) is equal to the diameter width of the main roller (1).

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