Tissue printing pressing roller
The paper towel printing roller with parallel or intersecting grooves addresses the issue of paper layer dispersion by ensuring the paper layers remain intact during printing, achieving high-quality prints.
Patent Information
- Application Number
- CN202510614065.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-13
- Publication Date
- 2025-07-15
AI Technical Summary
The paper towel printing pressure roller on existing paper towel printing machines can easily cause the paper layer to be dispersed during the printing process, especially for small-diameter paper towel raw materials and sugar cane bagasse and bamboo pulp paper towel raw materials, which seriously affects the printing quality.
A paper towel printing pressing roller is designed, and its working surface is composed of a smooth cylindrical surface and an embossed surface in the middle. The embossed surface has tightly arranged parallel troughs or multiple staggered groups of parallel troughs, with a groove depth of 0.1-0.2mm, a groove top width of 0.1-0.3mm, and a cylinder surface diameter of 90-120mm to prevent the paper layer from dispersing.
Effectively prevent the dispersion of tissue tissues after printing, ensure the quality of printing, and is suitable for multi-layer soft tissue raw materials.
Smart Images
Figure CN120307705A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of paper towel manufacturing machinery, and in particular to a component for pressing an unfolded wide-width paper towel raw material roll onto a patterned bump flower surface roll on a paper towel printing machine. Background Art
[0002] Currently, for the paper towel printing pressure roller used on a paper towel printing machine to press an unfolded paper towel raw material roll onto a paper towel printing pressure roller with patterned bumps on its surface, the working surface for applying pressure is a smooth cylindrical surface. According to the requirements of paper towel embossing, the raised points of the flower surface roll cooperating with the paper towel printing pressure roller are very small, generally 0.1 - 0.2 mm in height, and the top surface of the raised points is also very small, generally 0.6 - 0.7 mm in general length and width. Therefore, the existing paper towel printing pressure roller has the following deficiencies when printing on a paper towel raw material roll: Since the raw material paper towel roll is composed of multiple layers of soft paper laminated into a finished paper towel, after the raw material paper towel roll is embossed by the cooperation of the paper towel printing pressure roller and the flower surface roll, the printed paper towel will have the defect of paper layer dispersion. Especially when using a paper towel printing pressure roller with a small diameter and a paper towel raw material roll mainly made of bagasse and bamboo pulp, the paper layer dispersion of the printed paper towel can reach a serious level where it cannot be used normally. Summary of the Invention
[0003] The present invention provides a paper towel printing roller to solve the problem of paper layer dispersion in the paper towels printed by the existing paper towel printing roller.
[0004] To solve the above problem, the working surface of the paper towel printing pressure roller of the present invention is composed of smooth cylindrical surfaces at both ends and an embossed surface in the middle. The embossed surface has densely arranged parallel grooves, the groove depth H of these grooves is 0.1 - 0.2 mm, the groove top width T is 0.1 - 0.3 mm, the groove top opening width T1 is 0.2 - 0.3 mm, the diameter of the cylindrical surface is D, and the groove top diameter in the embossed surface is D1, and D ≥ D1.
[0005] In the above paper towel printing pressure roller, the width L of the cylindrical surface is ≥ 5 mm, and the value of the diameter D of the cylindrical surface is preferably 90 - 120 mm; the grooves can be rectangular grooves with the same groove bottom width and groove top opening width or trapezoidal grooves with the groove bottom width T2 less than the groove top opening width T1.
[0006] To solve the above problem, the paper towel printing pressure roller of the present invention can also be that the working surface is composed of smooth cylindrical surfaces at both ends and an embossed surface in the middle. The embossed surface has patterns formed by multiple groups of densely arranged parallel grooves intersecting, the groove depth H1 of these grooves is 0.1 - 0.2 mm, the groove top width T1 is 0.1 - 0.3 mm, the diameter of the cylindrical surface is D2, and the groove top diameter in the embossed surface is D3, and D2 ≥ D3.
[0007] Under this solution, the width L2 of the cylindrical surface ≥ 5 mm, and the value of the diameter D2 of the cylindrical surface of the tissue printing pressure roller is preferably 90 - 120 mm. The wire groove can be a rectangular groove with the same width at the bottom and the opening at the top of its cross-section, or a trapezoidal groove with the bottom width T2 of the wire groove less than the opening width T1 at the top of the groove.
[0008] Due to the adoption of the above technical solution, the present invention has the following beneficial effects compared with the prior art: The working surface of the tissue printing pressure roller consists of a smooth cylindrical surface and an embossed surface in the middle. This embossed surface has parallel and densely arranged wire grooves or patterns formed by multiple groups of parallel and densely arranged wire grooves intersecting. The groove depth of these wire grooves is 0.1 - 0.2 mm, and the groove width at the top is 0.1 - 0.3 mm. This structure can enable multiple layers of soft tissue raw paper to have multiple indentation marks on the raised pattern points of the pattern roller surface after being imprinted by this pressure roller and a pattern roller with raised pattern points on the surface. Thus, it can completely prevent the problem of paper layer dispersion in the printed tissue. Description of the Drawings
[0009] Figure 1 is the front view of the tissue printing pressure roller in Embodiment 1 of the present invention.
[0010] Figure 2 is the right view of the tissue printing pressure roller in Embodiment 1 of the present invention.
[0011] Figure 3 is Figure 2 the partial enlarged view at B in
[0012] Figure 4 is Figure 1 the sectional view at C in
[0013] Figure 5 is Figure 4 the partial enlarged view at D in
[0014] Figure 6 Schematic diagram of the parallel wire groove structure in Embodiment 2 of the present invention. Detailed Description of the Invention
[0015] The present invention will be further described in detail below in conjunction with the embodiments of the drawings: Embodiment 1: Tissue printing pressure roller with densely arranged parallel rectangular wire grooves Figures 1 to 5The paper towel printing pressure roller shown is installed outside the roller shaft when in use. Its working surface is composed of smooth cylindrical surfaces at both ends and an embossed surface in the middle. The width of the cylindrical surface is L, L=5 mm, and the width of the embossed surface is 120 mm. There are closely spaced parallel grooves on the embossed surface. The parallel grooves are rectangular grooves with the same groove bottom width and groove top opening width. The groove depth of the groove is H, H=0.1 mm, and the groove top width is T, T=0.17. The diameter of the cylindrical surface is D, D=110, and the groove top diameter of the embossed surface is D1, D=110 mm. D is greater than or equal to D1 to prevent the grooves on the embossed surface from being damaged. In other embodiments, the diameter of the cylindrical surface is D, and the value of the value can be determined according to the length of the paper towel printing pressure roller to ensure that the paper towel printing pressure roller does not bend under the working pressure and the deformation degree is less than one-fifth of the groove depth of the groove. When the length of the paper towel printing pressure roller is less than 250 mm, the diameter of the cylindrical surface is D of 90-120 mm, which does not affect the printing quality and can effectively prevent the printed paper towels from having paper layer dispersion.
[0016] Embodiment 2: The paper towel printing pressure roller with closely packed parallel trapezoidal grooves.
[0017] Figure 6 The paper towel printing pressure roller with closely arranged parallel trapezoidal grooves is shown. Except that the parallel grooves are trapezoidal grooves that are wide at the top and narrow at the bottom, the structure and shape of other parts are exactly the same as those of Example 1. In this embodiment, the depth of the trapezoidal grooves is H1, H1=0.15 mm, the width of the groove top is T, T=0.17, the width of the groove top opening is T1, T1=0.3 mm, and the width of the groove bottom is T2, T2=0.2 mm. The groove bottom width is smaller than the groove top width, which can prevent the printed paper towel from being scattered.
[0018] For this kind of paper towel printing pressure roller with closely packed parallel trapezoidal grooves, in other embodiments, as long as the groove top width T is controlled within the range of 0.1-0.3 mm, the groove top opening width T1 is controlled within the range of 0.1-0.3 mm, and the groove depth H1 is controlled within the range of 0.1-0.2 mm, the printed paper towel can be effectively prevented from having paper layers dispersed.
[0019] The parallel grooves of the paper towel printing pressure roller of the present invention in the above-mentioned embodiments 1 and 2 are all parallel grooves of a circular ring along the main line of the cylinder. In other embodiments, they can also be parallel grooves of an elliptical ring along the outer contour line of the bevel section of the cylinder, or they can be multiple groups of grooves formed by crossing two groups of parallel grooves of an elliptical ring.
Claims
1. A tissue printing pressure roller, characterized in that: The working surface is composed of smooth cylindrical surfaces at both ends and an embossed surface in the middle. The embossed surface has closely spaced parallel grooves with a groove depth of H=0.1-0.2mm and a groove top width of T=0.1-0.3mm. The diameter of the cylindrical surface is D, and the groove top diameter of the embossed surface is D1, where D≥D1.
2. The tissue paper printing pressure roller according to claim 1, wherein: The width L of the cylindrical surface is ≥5 mm, and the diameter D of the cylindrical surface is 90-120 mm.
3. The tissue paper printing pressure roller according to claim 1 or 2, characterized in that: The wire trough is a rectangular trough with the same width at the bottom as that at the top of the trough.
4. The paper towel printing pressure roller according to claim 1 or 2, characterized in that: The wire groove is a trapezoidal groove whose groove bottom width T2 is smaller than the groove top opening width T1.