Wide tissue printing machine

Abstract

The utility model discloses a wide tissue printing machine, which is used for pressing patterns formed by convex and concave points on unfolded wide tissue raw material roll paper, and adopts the technical scheme that one of a pattern surface roller and a plain roller adopts a smaller and shorter structure, so that the pattern surface roller and the plain roller can be pressed on the premise of not influencing the quality of the embossed tissue patterns. The problems that a machine in the prior art is heavy, high in manufacturing cost and high in installation and maintenance cost can be effectively solved.

Description

Technical Field

[0001] This utility model relates to the field of paper towel manufacturing machinery technology, and in particular to a machine for pressing out patterns of raised and recessed dots on an unfolded wide roll of paper towel raw material. Background Technology

[0002] Existing wide-format tissue printing machines mostly use printing rollers as their main component. Figure 1 and Figure 2 As shown, in order to press embossed patterns onto the unfolded roll of tissue paper, this wide-width tissue paper printing machine is equipped with at least one set of printing rollers. Each set of printing rollers consists of a patterned roller 32 and a smooth roller 31, which is axially parallel to the patterned roller 32 and presses against the outer circumference of the patterned roller 32. The working surface of the patterned roller 32 has a pattern composed of many raised points arranged on its cylindrical outer surface; the working surface of the smooth roller 31 has no raised points on its cylindrical surface, and its cylindrical outer surface is relatively smooth. In order to print patterns on the roll of tissue paper, the working width of the patterned roller 32 is generally 1.4 meters or even larger. The patterned roller 32 is mounted on the frame 33 by support shafts and bearing seats at both ends, and the smooth roller 31 is movably mounted in the slide groove of the frame 33 by support shafts and bearing seats 34 at both ends. A drive cylinder 35 for driving the smooth roller 31 is installed between the bearing seat 34 of the smooth roller 31 and the frame 33. In this wide-width tissue printing machine, the motor 37 drives the patterned roller 32 to rotate via a belt drive, and the drive cylinder 35 drives the smooth roller 31 to press against the patterned roller 32. Because the tissue paper roll is very thin after being unfolded, the height of the raised points on the surface of the patterned roller 32 is very small, generally only about 0.8 mm. In order to ensure that the raised pattern points are uniform and consistent across the entire width of the tissue paper, the patterned roller 32 and the smooth roller 31 are required to have sufficient bending strength during operation. They are generally made of steel and have a diameter of 270 mm or more.

[0003] The existing structure of tissue printing machines results in the following shortcomings: 1. High precision requirements for printing rollers, leading to high costs; 2. Large weight; 3. High requirements for installation, transportation, operation, and maintenance. Utility Model Content

[0004] This invention provides a wide-width tissue paper printing machine to solve the problems caused by the high cost and heavy weight of existing wide-width tissue paper printing machines.

[0005] To address the aforementioned problems, the technical solution adopted by this utility model for a wide-width tissue printing machine is as follows: it includes a patterned roller and a smooth roller, as well as a frame for mounting the patterned roller and the smooth roller. Multiple smooth rollers press against the same patterned roller, and each smooth roller is movably mounted on the frame via a smooth roller bracket. A force-applying mechanism is installed between the smooth roller bracket and the frame. In this solution, it is preferable that there are four or more smooth rollers pressing against the same patterned roller, and the diameter of the smooth roller surface is preferably less than or equal to 120 mm. The shorter the length of the smooth roller, the smaller its diameter can be selected, resulting in better material saving and weight reduction.

[0006] The technical solution adopted by the wide-width tissue paper printing machine of this utility model can also be: multiple patterned rollers pressing against the same smooth roller, each patterned roller being movably mounted on the frame via a patterned roller bracket, and a force-applying mechanism installed between the patterned roller bracket and the frame. In this solution, it is preferable that there are four or more patterned rollers pressing against the same smooth roller, and the roller surface diameter of the patterned roller is preferably less than or equal to 120 mm. The smaller the length of the patterned roller, the smaller its diameter can be selected, resulting in better material saving and weight reduction effects.

[0007] In the above-mentioned technical solutions for two wide-format paper towel printing machines, the force-applying components can be airbags with internal compressed air sources, capsules with internal hydraulic media, power-driven cylinders, or metal springs.

[0008] By adopting the above technical solution, this utility model has the following beneficial effects compared with the prior art:

[0009] 1. Since there are multiple smooth rollers pressing against the same patterned roller, or multiple patterned rollers pressing against the same smooth roller, the pressing force per unit length remains unchanged. This allows for the reduction of the diameter of either the smooth roller or the patterned roller, while preventing bending and deformation caused by the reduction of their diameter, thus affecting the embossing quality. Therefore, the overall weight of the wide-width tissue printing machine can be greatly reduced.

[0010] 2. Because the diameter of the patterned or smooth rollers is reduced, their processing difficulty is greatly reduced, and transportation, installation, debugging, maintenance, and replacement become easier and more cost-effective.

[0011] 3. The force-applying mechanism uses an airbag with an internally connected compressed air source, which can balance the pressure on each smooth roller and achieve consistent pressure between the smooth roller and the pattern roller, thereby achieving consistent printing pattern depth and improving the overall quality stability of the product. Attached Figure Description

[0012] Figure 1This is a schematic diagram of the printing roller pair in an existing wide-width tissue printing machine.

[0013] Figure 2 yes Figure 1 Sectional view at point C.

[0014] Figure 3 This is a top view of Embodiment 1 of the wide-format paper towel printing machine.

[0015] Figure 4 yes Figure 3 A schematic diagram of the cross-sectional structure at point A in the middle.

[0016] Figure 5 yes Figure 4 A magnified view of a portion of point D.

[0017] Figure 6 A three-dimensional structural diagram of Example 1 of this wide-width tissue printing machine.

[0018] Figure 7 yes Figure 7 A magnified view of a portion of the image.

[0019] Figure 8 This is a schematic diagram of the airbag structure in Example 2 of this wide-format tissue printing machine.

[0020] The numbers in the diagram are: 11-Smooth roller, 12-Smooth roller support, 13-Patterned roller, 14-Frame connector, 15-Bearing seat, 16-Airbag, 17-Frame, 18-Bearing seat, 19-Motor, 20-Belt drive, 21-Elastic plate, 22-Patterned roller, 23-Smooth roller, 24-Smooth roller support, 25-Airbag, 26-Frame, 27-Elastic plate. Detailed Implementation

[0021] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments:

[0022] Example 1 of a wide-width tissue printing machine:

[0023] Figures 3 to 7The diagram shows the structure of the two sets of printing rollers in a wide-width tissue paper printing machine. The main components of this wide-width tissue paper printing machine that perform the printing process on the roll of wide-width tissue paper are: two patterned rollers 13 mounted on the frame 17 via bearing seats 15 and 18. The patterned rollers 13 have a working surface length of 1400 mm and a diameter of 280 mm. Each patterned roller 13 has five smooth rollers 11 with a working surface length of 140 mm distributed on one side. (In the applicant's replacement machine for the same type of wide-width tissue paper printing machine, each patterned roller 13 has ten smooth rollers 11 with a working surface length of 140 mm and a diameter of 90 mm distributed on one side. These ten smooth rollers 11 are arranged in two staggered rows, with five rollers in each row.) Each smooth roller is... Do not install it on the glossy roller bracket 12. The glossy roller bracket 12 is mounted on the frame connector 14 of the frame 17 via an elastic plate 21. An air bag 16 with an internal compressed air source is installed between the glossy roller bracket 12 and the frame 17. When the wide-width tissue printing machine is printing, the motor 19 drives the two patterned rollers 13 to rotate through the belt drive device 20. The air bag 16 with the compressed air source acts as a force-applying component. Under the action of compressed gas, it applies pressure to the glossy roller bracket 12. The glossy roller bracket 12 overcomes the elasticity of the elastic plate 21 and presses the glossy roller 11 against the patterned roller 12, so that the wide-width tissue raw material roll is imprinted on the pattern of the raised points of the patterned roller 13. In this embodiment, the airbag 16 is an integral long strip shape shared by 5 smooth roller supports. When the printing is in operation, the airbag 16 expands after being supplied with compressed air, pushing the 5 smooth roller supports 12 on the same frame 17 to press against the patterned roller 13.

[0024] Compared with the applicant's existing wide-width tissue paper printing machine with the same working surface length and diameter of the printing roller, this embodiment can reduce the overall weight of the wide-width tissue paper printing machine by 20%; and reduce the manufacturing cost of the printing rollers alone by 30%.

[0025] Example 2 of a wide-width tissue printing machine:

[0026] The wide-width tissue printing machine in this embodiment, except Figure 8 Except for the airbag structure, which is different from that in Example 1, the rest, including the length and diameter of the working surface of the patterned roller, are exactly the same as in Example 1.

[0027] Figure 8As shown, a set of printing rollers in this wide-format tissue printing machine consists of a patterned roller 22 with a working surface diameter of 280 mm and a length of 1400 mm, and five smooth rollers 23 with a working surface diameter of 90 mm and a length of 140 mm. The smooth rollers 23 are mounted on the outside of the patterned rollers 22 via smooth roller brackets 24. The smooth roller brackets 24 are mounted on the frame 26 via elastic plates 27. An airbag 25 with an internal compressed air source is installed between the smooth roller brackets 24 and the frame 26. In this embodiment, the airbag 25 acts independently on a single smooth roller bracket 24. The advantage of this structure is that the airbag 25 can be replaced and its pressure adjusted individually.

[0028] Based on the concept and principle of this utility model, in other embodiments, the wide-width tissue printing machine can also achieve the same utility model effect by swapping the size and installation structure of the patterned roller and the smooth roller in the printing roller pair. For example, the patterned roller pressing against the smooth roller with a diameter of 270 mm and a length of 1400 mm has five short patterned rollers with a diameter of 90 mm and a length of 140 mm. Each patterned roller is movably mounted on the frame through a patterned roller bracket. An airbag or spring force-applying mechanism is installed between the patterned roller bracket and the mounting frame. When printing is in operation, the force-applying mechanism drives the patterned roller to press against the smooth roller through the patterned roller bracket. This structure can also achieve the technical effects of Examples 1 and 2.

Claims

1. A wide-width tissue paper printing machine, comprising a patterned roller and a smooth roller, and a frame for mounting the patterned roller and the smooth roller, characterized in that: There are multiple smooth rollers pressing against the same patterned roller. Each smooth roller is movably mounted on the frame via a smooth roller bracket. A force-applying mechanism is installed between the smooth roller bracket and the frame.

2. The wide-width tissue printing machine according to claim 1, characterized in that: There are four or more smooth rollers pressing against the same patterned roller, and the diameter of the smooth roller is less than or equal to 120 mm.

3. The wide-width tissue printing machine according to claim 1 or 2, characterized in that: The force-applying component is an airbag internally connected to a compressed air source.

4. A wide-width tissue paper printing machine, comprising a patterned roller and a smooth roller, and a frame for mounting the patterned roller and the smooth roller, characterized in that: There are four or more patterned rollers pressing against the same smooth roller. Each patterned roller is movably mounted on the frame via a patterned roller bracket. A force-applying mechanism is installed between the patterned roller bracket and the frame. The diameter of the patterned roller surface is less than or equal to 120 mm.

5. The wide-width tissue printing machine according to claim 4, characterized in that: The force-applying component is an airbag internally connected to a compressed air source.

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