Tissue air-drying and shaping equipment

Abstract

The utility model discloses paper towel air-drying and shaping equipment which comprises a paper pulp spray pipe set, a paper pulp finished paper conveying belt, a pulp squeezing roller combination, a paper towel air-drying guide roller combination and an air-drying fan set. The paper pulp finished paper conveying belt comprises a conveying belt, two driving rollers and two driven rollers; the shoving roller combination comprises a plurality of shoving roller groups and a shrinking paper forming roller group; a paper pulp spray pipe for spraying paper pulp towards the bottom of each driving shoving roller is arranged above the conveying belt on the front side of the driving shoving roller; and a paper pulp spray pipe for spraying paper pulp towards the bottom of the shrinking paper forming roller is also arranged above the conveying belt on the front side of the first shrinking paper forming roller. Paper towels with a certain thickness are formed after step-by-step extrusion, the paper towels are thickened through water scraping of the shrinkage paper forming roller and increase of the paper pulp adhesion degree, finally the paper towels are separated from the conveying belt after being formed, and the paper towels with the required thickness can be shaped through air blowing of the air drying fan.

Description

Technical Field

[0001] This utility model relates to the field of tissue paper shaping technology, and in particular to a tissue paper air drying and shaping device. Background Technology

[0002] There are many raw materials used to manufacture paper towels, commonly including natural and pollution-free materials such as cotton pulp, wood pulp, bamboo pulp, and straw pulp. Paper towels must be free of toxic chemicals, skin-irritating ingredients, and mold, viruses, and bacteria residues. The characteristics of paper towels are strong absorbency, absence of pathogens (E. coli and other pathogens are not allowed), soft and uniform thickness without holes, even wrinkling, consistent color, and no impurities. In the production of toilet paper, during the pulp forming process, the pulp is extruded and adheres to a conveyor belt, gradually forming a shrunken paper strip. However, the thickness of the paper strip is difficult to control, and it is prone to breakage when detached from the extrusion belt. Drying after detachment is also troublesome and difficult to reshape. Utility Model Content

[0003] This utility model aims to at least partially solve one of the technical problems in the related art. Therefore, one objective of this utility model is to provide a paper towel air-drying and shaping device that solves the problems of difficulty in extruding pulp to the required thickness and the inconvenience of air-drying and shaping after molding.

[0004] A paper towel air-drying and shaping device according to the present invention includes a pulp spray pipe assembly, a pulp paper conveyor belt, a pulp extrusion roller assembly, a paper towel air-drying guide roller assembly, and an air-drying fan assembly;

[0005] The pulp forming conveyor belt includes a conveyor belt, two drive rollers and two driven rollers. The conveyor belt is fitted over the two drive rollers and the two driven rollers, with the two drive rollers below and the two driven rollers above, so that the conveyor belt forms a trapezoid.

[0006] The extrusion roller assembly includes multiple sets of extrusion roller groups and shrinkage forming roller groups. Each set of extrusion roller groups includes a pair of driven extrusion rollers and a driving extrusion roller. The pair of driven extrusion rollers are located on the lower surface of the conveyor belt, and the driving extrusion roller is located above the middle position of the pair of driven extrusion rollers and presses the conveyor belt downward. The shrinkage forming roller group includes multiple belt shaping rollers and multiple shrinkage forming rollers. Multiple belt shaping rollers are evenly spaced on the lower surface of the conveyor belt behind the multiple sets of extrusion roller groups. A shrinkage forming roller is correspondingly located above the conveyor belt directly above each belt shaping roller. The bottom of the shrinkage forming roller is at a distance from the upper surface of the conveyor belt that is not less than the thickness of the paper towel.

[0007] Above the conveyor belt in front of each of the driving extrusion rollers, there is a pulp spray pipe that sprays pulp toward the bottom of the driving extrusion rollers, and above the conveyor belt in front of the first shrinking paper roller, there is also a pulp spray pipe that sprays pulp toward the bottom of the shrinking paper roller.

[0008] After the formed tissue paper is detached from the conveyor belt, it passes through the tissue paper drying guide roller assembly and the drying fan assembly includes multiple pairs of mutual blowing fans, each pair of mutual blowing fans blowing air onto the tissue paper above and below between adjacent tissue paper drying guide rollers.

[0009] In some embodiments of this utility model, the upper belt of the conveyor belt is horizontally arranged, and there are three extrusion roller groups. The driving extrusion rollers in the first to third groups are respectively named the first driving extrusion roller, the second driving extrusion roller, and the third driving extrusion roller. The first driving extrusion roller, the second driving extrusion roller, and the third driving extrusion roller respectively extrude the conveyor belt downward by a deformation degree of 6-10mm, 4-8mm, and 2-4mm.

[0010] In some other embodiments of this utility model, the shrinking paper forming roller includes a first shrinking paper forming roller, a second shrinking paper forming roller, and a third shrinking paper forming roller, wherein the distance between the first shrinking paper forming roller, the second shrinking paper forming roller, and the third shrinking paper forming roller and the upper surface of the conveyor belt gradually decreases.

[0011] In some other embodiments of this utility model, the paper towel drying guide roller assembly includes a large-turn drying guide roller, a micro-turn drying guide roller, and a vertical-turn drying guide roller. The large-turn drying guide roller includes two rollers, which make the paper towel bend angle between 30-45°. The micro-turn drying guide roller includes at least three rollers, which make the paper towel bend angle between 5-10°. The vertical-turn drying guide roller includes two rollers, which make the paper towel stand vertically upward.

[0012] In some other embodiments of this utility model, the airflow of the multiple pairs of mutual blowing fans gradually increases from the position of the large turning drying guide roller to the position of the upright turning drying guide roller.

[0013] In some other embodiments of this utility model, the pulp spray pipe is a flat pipe, and the width of the elongated nozzle of the pulp spray pipe is greater than the width of the conveyor belt.

[0014] In this invention, the pulp is squeezed onto the conveyor belt by the extrusion roller, causing the pulp to adhere to the conveyor belt during the extrusion process. After being extruded step by step, a paper towel of a certain thickness is formed. Then, the paper towel is scraped by the shrinking roller to increase the adhesion of the pulp and make the paper towel thicker. Finally, after being formed, it is separated from the conveyor belt and enters the paper towel drying guide roller assembly. After repeated bending, it is blown by the drying fan to dehydrate it completely and form a fixed paper towel, which can achieve the required thickness of paper towel. Attached Figure Description

[0015] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0016] Figure 1 This is a schematic diagram of the structure of a paper towel air-drying and shaping device proposed in this utility model.

[0017] Figure 2 This is a schematic diagram of the pulp nozzle proposed in this utility model.

[0018] In the diagram, 1. Conveyor belt; 11. Drive roller; 2. Driven extrusion roller; 21. First drive extrusion roller; 22. Second drive extrusion roller; 23. Third drive extrusion roller; 3. Pulp nozzle; 31. Long strip nozzle; 4. Belt shaping roller; 41. First shrinkage roller; 42. Second shrinkage roller; 43. Third shrinkage roller; 5. Large turning air-drying guide roller; 6. Micro-turn air-drying guide roller; 7. Vertical turning air-drying guide roller; 8. Mutual blowing fan. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0020] Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0021] Reference Figure 1-2 A paper towel air drying and shaping device includes a pulp spray pipe assembly, a pulp paper conveyor belt, a pulp extrusion roller assembly, a paper towel air drying guide roller assembly, and an air drying fan assembly;

[0022] The pulp forming conveyor belt includes a conveyor belt 1, two drive rollers 11 and two driven rollers. The conveyor belt 1 is fitted on the two drive rollers 11 and the two driven rollers, with the two drive rollers 11 below and the two driven rollers above, so that the conveyor belt 1 forms a trapezoid.

[0023] The purpose of forming a trapezoidal shape is to increase the contact area between the drive roller 11 and the conveyor belt, making it easier to drive.

[0024] The extrusion roller assembly includes multiple sets of extrusion roller groups and shrinkage forming roller groups. Each set of extrusion roller groups includes a pair of driven extrusion rollers 2 and a driving extrusion roller. The pair of driven extrusion rollers 2 are located on the lower surface of the conveyor belt 1, and the driving extrusion roller is located above the middle position of the pair of driven extrusion rollers 2 and presses the conveyor belt 1 downward. The shrinkage forming roller group includes multiple belt shaping rollers 4 and multiple shrinkage forming rollers. Multiple belt shaping rollers 4 are evenly spaced on the lower surface of the conveyor belt 1 behind the multiple sets of extrusion roller groups. A shrinkage forming roller is correspondingly located above the conveyor belt 1 directly above each belt shaping roller 4. The bottom of the shrinkage forming roller is not less than the thickness of the paper towel from the upper surface of the conveyor belt.

[0025] During the pulping process, some fibers adhere to the conveyor belt. After multiple drives of the pulping rollers, the adhesion thickness changes. Then, the water is scraped off by the subsequent shrinkage rollers, causing the fibers to adhere to the conveyor belt again. This process continues until the last shrinkage roller, which forms the required thickness of paper towels, but with a high moisture content. The paper towels can then be separated from the conveyor belt 1 and fed into the paper towel drying guide roller assembly.

[0026] Above each of the drive extrusion rollers, there is a pulp spray pipe 3 that sprays pulp toward the bottom of the drive extrusion rollers. Above the first shrinking paper roller, there is also a pulp spray pipe 3 that sprays pulp toward the bottom of the shrinking paper roller.

[0027] The pulp nozzle 3 continuously sprays pulp. Each time the extrusion roller is driven, pulp is sprayed before extrusion and extrusion is performed. During multiple extrusions, pulp is sprayed once, thus forming a gradually thickening pulp fiber layer.

[0028] After the formed paper towels are detached from the conveyor belt 1, they pass through the paper towel drying guide roller assembly and are conveyed. The drying fan assembly includes multiple pairs of mutual blowing fans 8, each pair of mutual blowing fans blowing air onto the paper towels above and below each other between adjacent paper towel drying guide rollers.

[0029] The upper layer of the conveyor belt 1 is horizontally positioned. There are three extrusion roller groups. The driving extrusion rollers in the first to third groups are named the first driving extrusion roller 21, the second driving extrusion roller 22, and the third driving extrusion roller 23, respectively. The first driving extrusion roller 21, the second driving extrusion roller 22, and the third driving extrusion roller 23 respectively extrude the conveyor belt 1 downwards by 6-10mm, 4-8mm, and 2-4mm.

[0030] The degree of compression deformation gradually decreases to prevent excessive subsequent compression, which would reduce the thickness of the formed fibers. The pulp fiber layer has a certain compressive strength; even with deformation below 5mm, a fiber layer of 0.5-1.5mm can still be formed.

[0031] The shrinking paper forming rollers include a first shrinking paper forming roller 41, a second shrinking paper forming roller 42, and a third shrinking paper forming roller 43. The distance between the first shrinking paper forming roller 41, the second shrinking paper forming roller 42, and the third shrinking paper forming roller 43 and the upper surface of the conveyor belt 1 gradually decreases.

[0032] As the squeegee's effectiveness gradually increases, it eventually forms a thicker fibrous tissue, eliminating the need for shrinkage into a paper roll.

[0033] The paper towel air-drying guide roller assembly includes a large-turn air-drying guide roller 5, a micro-turn air-drying guide roller 6, and a vertical-turn air-drying guide roller 7. The large-turn air-drying guide roller 5 includes two rollers, which make the paper towel bend angle between 30-45°. The micro-turn air-drying guide roller 6 includes at least three rollers, which make the paper towel bend angle between 5-10°. The vertical-turn air-drying guide roller 7 includes two rollers, which make the paper towel stand vertically upward.

[0034] The large-turn drying guide roller 5 causes the paper towel to move upwards to a certain extent. Initially, it contains more water, so it is squeezed to remove excess water and then blown away the adhering water. The subsequent small-turn drying guide roller 6 provides the paper towel with a certain driving force, facilitating its movement before further drying. The upright-turning drying guide roller 7 dries the paper towel relatively quickly and is the final drying process. The above-mentioned drying guide rollers can be added as needed to improve the drying effect.

[0035] The airflow from the large turning guide roller 5 to the vertical turning guide roller 7 gradually increases. Initially, when the water content is high, the airflow is strong, and dehydration is rapid, leading to breakage.

[0036] The pulp spray pipe 3 is a flat pipe, and the width of the elongated nozzle 31 of the pulp spray pipe 3 is greater than the width of the conveyor belt 1. This ensures that the conveyor belt can be sprayed with all the pulp.

[0037] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A paper towel air-drying and shaping device, characterized in that: It includes a pulp spray nozzle assembly, a pulp-to-paper conveyor belt, a pulp extrusion roller assembly, a paper towel air-drying guide roller assembly, and an air-drying fan assembly; The pulp forming conveyor belt includes a conveyor belt (1), two drive rollers (11) and two driven rollers. The conveyor belt (1) is fitted on the two drive rollers (11) and the two driven rollers, with the two drive rollers (11) below and the two driven rollers above, so that the conveyor belt (1) forms a trapezoid. The extrusion roller assembly includes multiple sets of extrusion roller groups and shrinkage forming roller groups. Each set of extrusion roller groups includes a pair of driven extrusion rollers (2) and a driving extrusion roller. The pair of driven extrusion rollers (2) are located on the lower surface of the conveyor belt (1). The driving extrusion roller is located above the middle position of the pair of driven extrusion rollers (2) and presses the conveyor belt (1) downward. The shrinkage forming roller group includes multiple belt shaping rollers (4) and multiple shrinkage forming rollers. Multiple belt shaping rollers (4) are evenly spaced on the lower surface of the conveyor belt (1) behind the multiple sets of extrusion roller groups. A shrinkage forming roller is correspondingly located above the conveyor belt (1) directly above each belt shaping roller (4). The bottom of the shrinkage forming roller is not less than the thickness of the paper towel from the upper surface of the conveyor belt. Above each of the conveyor belts (1) in front of the driving extrusion rollers, there is a pulp spray pipe (3) that sprays pulp toward the bottom of the driving extrusion rollers. Above the conveyor belts (1) in front of the first shrinking paper rollers, there is also a pulp spray pipe (3) that sprays pulp toward the bottom of the shrinking paper rollers. After the formed paper towel is detached from the conveyor belt (1), it passes through the paper towel drying guide roller assembly, which includes multiple pairs of mutual blowing fans (8), each pair of mutual blowing fans blowing air onto the paper towel above and below between adjacent paper towel drying guide rollers.

2. The paper towel air-drying and shaping equipment according to claim 1, characterized in that: The upper belt of the conveyor belt (1) is horizontally positioned. There are three extrusion roller groups. The extrusion rollers in the first to third groups are named the first driving extrusion roller (21), the second driving extrusion roller (22), and the third driving extrusion roller (23), respectively. The first driving extrusion roller (21), the second driving extrusion roller (22), and the third driving extrusion roller (23) respectively extrude the conveyor belt (1) downward by 6-10mm, 4-8mm, and 2-4mm.

3. The paper towel air-drying and shaping equipment according to claim 1, characterized in that: The shrinking paper forming rollers include a first shrinking paper forming roller (41), a second shrinking paper forming roller (42), and a third shrinking paper forming roller (43), and the distance between the first shrinking paper forming roller (41), the second shrinking paper forming roller (42), and the third shrinking paper forming roller and the upper surface of the conveyor belt (1) gradually decreases.

4. The paper towel air-drying and shaping equipment according to claim 1, characterized in that: The paper towel drying guide roller assembly includes a large-turn drying guide roller (5), a micro-turn drying guide roller (6), and a vertical-turn drying guide roller (7). The large-turn drying guide roller (5) includes two rollers, which make the paper towel bend angle between 30-45°. The micro-turn drying guide roller (6) includes at least three rollers, which make the paper towel bend angle between 5-10°. The vertical-turn drying guide roller (7) includes two rollers, which make the paper towel vertically upward.

5. The paper towel air-drying and shaping equipment according to claim 4, characterized in that: The airflow of the multiple pairs of mutual blowing fans (8) gradually increases from the position of the large turning air drying guide roller (5) to the position of the upright turning air drying guide roller (7).

6. The paper towel air-drying and shaping equipment according to claim 1, characterized in that: The pulp spray pipe (3) is a flat pipe, and the width of the long nozzle (31) of the pulp spray pipe (3) is greater than the width of the conveyor belt (1).

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