Paper wetting roller and embossing mechanism

Abstract

According to the paper wetting roller, a roller surface is made of rubber, needle holes which are uniformly and densely distributed are integrally formed in the roller surface, the hole opening diameter of each needle hole is 0.3-1.5 mm, the hole bottom diameter of each needle hole is 0.1-1.0 mm, the depth of each needle hole is 0.1-1.0 mm, and the center distance between each needle hole and the nearest adjacent needle hole is 0.4-1.2 mm. Compared with an existing paper wetting roller, the paper wetting roller can more evenly coat the liquid medium on the surface of paper in a rolling mode. The knurling mechanism provided by the utility model adopts the paper wetting roller, so that the moisture of the toilet paper can be properly increased.

Description

Technical Field

[0001] This utility model relates to a dampening roller that uses a roller surface to uniformly coat the paper surface with liquid media such as water and cream. Background Technology

[0002] In paper production equipment, such as rewinders, folding machines, and embossing machines, dampening rollers are commonly used to evenly coat the paper surface with liquid media such as water and cream. Existing dampening rollers use a steel roller structure with a hard metal surface. To ensure even liquid distribution on the roller surface, existing dampening rollers have a textured surface composed of crisscrossing grooves. However, this textured structure is not very effective in achieving even liquid distribution. Utility Model Content

[0003] The purpose of this invention is to provide a dampening roller capable of uniformly distributing liquid across its surface. For the same purpose, this invention also provides an embossing mechanism.

[0004] The damping roller of this utility model is implemented as follows: the roller surface material of the damping roller is rubber, and the roller surface is integrally formed with uniformly distributed pinholes. The diameter of the pinhole opening is 0.3~1.5mm, the diameter of the pinhole bottom is 0.1~1.0mm, the depth of the pinhole is 0.1~1.0mm, and the center distance between each pinhole and the nearest adjacent pinhole is 0.4~1.2mm.

[0005] As the preferred embodiment, the roller surface material is nitrile rubber.

[0006] As the preferred embodiment, the overall shape of the pinhole is a truncated cone with an opening diameter larger than the bottom diameter.

[0007] In the preferred embodiment, the cone angle of the frustum of a circle is 10° to 20°.

[0008] All of the above numerical ranges include both endpoint values.

[0009] The embossing mechanism of this utility model is implemented as follows: the embossing mechanism includes a first embossing roller, which abuts against a first bottom roller. The roller surface of the first embossing roller is provided with raised patterns. When the paper passes between the first embossing roller and the first bottom roller, the first embossing roller presses patterns onto the paper. In particular, a dampening roller is provided that abuts against the first embossing roller. This dampening roller is a dampening roller of the present utility model. After the paper passes between the first embossing roller and the first bottom roller, it passes between the dampening roller and the first embossing roller. Water is evenly rolled onto the surface of the paper by the dampening roller.

[0010] The advantages of this invention are: compared to existing damping rollers, the rubber surface and special pinhole structure allow liquid media such as water and cream to be more evenly distributed on the roller surface, enabling the damping roller to more evenly coat the liquid media onto the paper surface. The embossing mechanism described in this invention allows for a moderate increase in moisture content in the toilet paper, thus providing numerous benefits (see the embodiments below for details). Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the overall shape of the dampening roller;

[0012] Figure 2 This is a schematic diagram of pinholes on the roller surface;

[0013] Figure 3 yes Figure 2 AA section view;

[0014] Figure 4 This is an example in which the surface of the dampening roller is locally covered with uniformly densely distributed pinholes;

[0015] Figure 5 This is an embodiment of the embossing mechanism described in this utility model. Detailed Implementation

[0016] To facilitate understanding of this utility model, the following embodiments provide a more comprehensive description of the utility model. The embodiments illustrate implementation methods of the utility model. However, the utility model can be implemented in many different forms and is not limited to the implementation methods described in the embodiments.

[0017] It should be noted that the terms "first" and "second" in this utility model are used only for distinguishing names and do not represent a specific quantity or order.

[0018] Figure 1 This is an embodiment of a damping roller, showing its overall shape. The roller surface 1 of the damping roller is a layer of rubber. Preferably, it is nitrile rubber. Figure 2 This is a magnified view of a portion of the roller surface, showing multiple enlarged pinholes 2. See also... Figure 2 , Figure 3 The diameter of the pinhole opening φ1 is 0.3~1.5mm, the diameter of the pinhole bottom φ2 is 0.1~1.0mm, the depth of the pinhole H is 0.1~1.0mm, and the center distance L between each pinhole and its nearest adjacent pinhole is 0.4~1.2mm. These numerical ranges include both endpoints. It should be noted that although the roller surface is curved, because the center distance between the pinholes is very small relative to the diameter of the roller surface, the roller surface between two adjacent pinholes can be considered as a plane, and the central axes of two adjacent pinholes can be considered as parallel lines. The center distance between two adjacent pinholes is simply the distance between their central axes.

[0019] It should be noted that the shape of the pinhole described in this invention is not limited to a circle; the shape of the pinhole opening and the bottom of the pinhole can be polygonal. For polygons, the diameter of the opening and the diameter of the bottom of the pinhole in this invention refer to the diameter of the circumcircle of the polygon.

[0020] For the best implementation, see Figure 3 The overall shape of the pinhole is a truncated cone with an opening diameter larger than its base diameter. This shape allows liquid to be contained within the hole while facilitating its expulsion. More preferably, the cone angle β of the truncated cone is 10° to 20°, including both endpoints. This is most advantageous for creating the pinhole using a monolithic molding process on the rubber material.

[0021] It should be noted that although this utility model requires the dampening roller surface to have uniformly densely distributed pinholes, it does not require the entire roller surface to be covered with pinholes. The dampening roller may only have uniformly densely distributed pinholes in certain parts of its surface; the specific selection depends on the actual area of ​​the paper that needs to be dampened. For example... Figure 4 The dampening roller shown has only two sections, B and C, with uniformly densely distributed pinholes on its surface; the rest of the roller surface is smooth.

[0022] Figure 5 This is an embodiment of the embossing mechanism described in this utility model. Embossing mechanisms are commonly used in embossing machines, rewinding machines, and other equipment. The embossing mechanism includes a first embossing roller 3 and a second embossing roller 4. The first embossing roller 3 abuts against a first bottom roller 5, and the second embossing roller 4 abuts against a second bottom roller 6. Both the first embossing roller 3 and the second embossing roller 4 have raised patterns on their surfaces. When paper 7 passes between the first embossing roller 3 and the first bottom roller 5, the first embossing roller 3 presses a pattern onto the paper 7. When paper 8 from another source passes between the second embossing roller 4 and the second bottom roller 6, the second embossing roller 4 presses a pattern onto the paper 8. When papers 7 and 8 pass simultaneously between the first embossing roller 3 and the second embossing roller 4, the raised patterns of the first embossing roller 3 and the second embossing roller 4 together clamp and press the papers 7 and 8, causing the papers 7 and 8 to be bonded together into a single sheet of paper.

[0023] See Figure 5The embossing mechanism includes a dampening roller 9 that rests against the first embossing roller 3. The dampening roller 9 is the dampening roller described in this invention. The paper 7 passes between the first embossing roller 3 and the first bottom roller 5, and then between the dampening roller 9 and the first embossing roller 3. The dampening roller 9 contacts the intermediate transfer roller 10, which in turn contacts the water supply roller 11, which is partially immersed in the water in the water storage pan 12. With the synchronous rotation of the first embossing roller 3, the dampening roller 9, the intermediate transfer roller 10, and the water supply roller 11, the water in the water storage pan 12 is rolled onto the intermediate transfer roller 10 via the water supply roller 11, then onto the dampening roller 9 via the intermediate transfer roller 10, and finally evenly coated onto the paper surface by the dampening roller 9. The rubber roller surface and special pinhole structure of the dampening roller 9 allow water, cream, and other liquid media to be evenly distributed on the roller surface of the first embossing roller 3. Furthermore, if the paper processed by the embossing mechanism is toilet paper (such as daily toilet paper rolls or folded tissues), the dampening roller described in this invention can also ensure that the amount of water stored on the roller surface is just right for the toilet paper, thus appropriately increasing the moisture content of the toilet paper. Adding a moderate amount of moisture to toilet paper has the following benefits: 1. It strengthens the bond between paper fibers, increasing paper flexibility and reducing the likelihood of breakage during subsequent processing. This makes the paper less prone to tearing when folding or bending, and also prevents delamination during embossing. 2. It eliminates static electricity, making it easier to perform various embossing and folding processes. 3. During calendering and rewinding, the paper better adapts to equipment pressure, achieving a more uniform thickness and smoother surface, improving flatness and gloss, and enhancing the paper's appearance quality. 4. The paper's pore structure is optimized, improving ink absorption. During the coloring process, ink penetrates and adheres better to the paper, resulting in higher clarity and saturation of text and images, richer color expression, and improved visual effects. 5. The expansion and contraction of the paper's internal fibers are in a relatively balanced state, improving dimensional stability. Under different environmental humidity levels, the paper is less prone to significant deformation and warping, ensuring dimensional accuracy during subsequent processing and preventing curling edges after folding.

[0024] In another embodiment of this utility model, the dampening roller is applied to an embossing mechanism, which can eliminate the need for... Figure 5 The intermediate transfer roller 10 allows the water supply roller 11 to directly contact the dampening roller 9.

[0025] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of patent protection. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the scope of protection of this utility model. The scope of protection of this utility model should be determined by the appended claims.

Claims

1. A paper moistening roller, characterized in that: The roller surface material is rubber, and the overall roller surface is formed with uniformly distributed and densely arranged pinholes. The diameter of the pinhole orifice is 0.3 - 1.5 mm, the diameter of the pinhole bottom is 0.1 - 1.0 mm, and the depth of the pinhole is 0.1 - 1.0 mm. The center distance between each pinhole and the nearest adjacent pinhole is 0.4 - 1.2 mm.

2. The dampening roller according to claim 1, wherein: The roller surface material is nitrile rubber.

3. A dampening roller according to claim 1, characterized in that: The overall shape of the pinhole is a regular truncated cone with a larger orifice diameter than the bottom diameter.

4. The dampening roller according to claim 3, wherein: The cone angle of the regular truncated cone is 10° - 20°.

5. An embossing mechanism, comprising a first embossing roller which abuts against a first bottom roller. The roller surface of the first embossing roller is provided with raised patterns. When the paper passes between the first embossing roller and the first bottom roller, the first embossing roller embosses the patterns on the paper. The characteristics are as follows: There is a dampening roller that abuts against the first embossing roller. This dampening roller is the dampening roller described in any one of claims 1 to 4. After the paper passes between the first embossing roller and the first bottom roller, it then passes between the dampening roller and the first embossing roller, and the dampening roller evenly rolls and coats water onto the paper surface.

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