High-bulk embossing device

Abstract

The utility model provides a high-bulk embossing device which comprises at least one humidifying unit, at least one embossing unit, at least one embossing unit, at least one embossing unit and at least one embossing unit, wherein the at least one humidifying unit is used for humidifying a raw paper web to form a wet paper web; the knurling roller group is arranged at the downstream of the humidifying unit and is used for knurling the wet paper web to form a wet knurled paper web; the drying unit is arranged at the downstream of the embossing roller set and used for drying the embossed paper web to form a dry embossed paper web; wherein the humidifying unit comprises a transfer belt wound on a plurality of carrier rollers and a spray head used for spraying water to the transfer belt, the transfer belt comprises an abutting section abutting against a raw paper web, and the abutting section is configured to humidify the raw paper web making contact with the abutting section. And meanwhile, water can be distributed more uniformly in the mode, so that the accuracy of the addition amount is ensured, the unexpected paper breaking phenomenon is not easy to occur, the production speed is improved, and the bulk of paper can be further improved in the mode.

Description

Technical Field

[0001] The utility model relates to a high-bulk embossing device, in particular to a high-bulk embossing device applied to daily paper. Background Art

[0002] Cellulose fiber structures are widely used in daily necessities such as toilet paper and napkins. Paper products are usually made of cellulose fiber structures formed by stacking at least one layer of base paper face to face to form a laminate. In order to meet consumers' demand for aesthetics, manufacturers use embossing technology on paper towels containing multiple layers of base paper. The embossing process not only makes the paper towels beautiful, but also increases the surface area of ​​the layer, improves the bulkiness, water holding capacity and softness.

[0003] In order to make the household paper have better bulk and touch, people have found that humidifying or moistening the paper before embossing, and then embossing and drying it can form household paper with better bulk and better touch. For example, the methods shown in documents such as CN110914048A and EP1731296B1, specifically, the humidification or moistening method used is to humidify or moisten the paper by spraying, but this method has the following problems:

[0004] 1. When the paper surface is humidified by spraying, the amount of water added is difficult to control due to the infiltration and diffusion process of water in the paper. It is easy to have excess or insufficient water in some areas, resulting in paper breaks during the production process or failure to achieve the set target during downstream embossing.

[0005] Second, due to the above problem, this method has a slow production speed or the amount of water sprayed is usually small, and it is still insufficient to improve the bulk thickness.

[0006] Therefore, it is necessary to provide a new solution to solve the above problems. Utility Model Content

[0007] To this end, the utility model provides a high bulk embossing device to solve the above technical problems.

[0008] A high bulk embossing device, comprising:

[0009] at least one humidifying unit, used for humidifying the base paper web to form a wet paper web;

[0010] An embossing roller group is arranged downstream of the humidifying unit and is used for embossing the wet paper web to form a wet embossed paper web;

[0011] A drying unit, disposed downstream of the embossing roller group, for drying the embossed paper web to form a dry embossed paper web;

[0012] The humidifying unit comprises a transfer belt wound around a plurality of rollers and a nozzle for spraying water on the transfer belt, the transfer belt comprises a conflicting section for conflicting with the base paper web, and the conflicting section is configured to humidify the base paper web in contact with the conflicting section.

[0013] Wherein, the transfer belt is water-permeable or water-impermeable. When the transfer belt is water-permeable, the transfer belt is felt cloth or blanket cloth. When the transfer belt is water-impermeable, the transfer belt is rubber band, plastic film or metal belt.

[0014] Wherein, the base paper web includes an upper surface and a lower surface, the humidifying unit includes a first humidifying unit, the first humidifying unit includes a first front roller, a first rear roller and a first transfer belt, the first transfer belt includes a first friction section located between the first front roller and the first rear roller, the first friction section frictionally contacts the lower surface, and the nozzle is arranged upstream of the first friction section.

[0015] Wherein, the first transfer belt includes a first surface facing the side of the base paper web, and the first humidifying unit also includes a first middle roller located upstream of the first contact section and a first clamping roller arranged corresponding to the first middle roller, wherein the first clamping roller contacts the first surface, and the first clamping roller is configured to apply adjustable pressure to the first surface.

[0016] Wherein, the first transfer belt is in an endless ring shape and is configured to move continuously under the drive of a driving device. The driving device includes a driving wheel, and the first transfer belt is wound around the driving wheel and a roller.

[0017] Among them, the first transfer belt includes a middle area and a side area, the driving device also includes a driving belt, the driving belt is wound around the driving wheel, the side area of ​​the first transfer belt is connected to the driving belt through a connecting device, and the connecting device includes a clip and bolts passing through the clip and the driving belt.

[0018] Wherein, the humidifying unit further includes a second humidifying unit, the second humidifying unit and the first humidifying unit are arranged back to back, and the second humidifying unit includes a second abutting section, and the second abutting section abuts against the upper surface.

[0019] Wherein, the second humidifying unit includes a second front roller, a second rear roller and a second transfer belt, the second front roller is located between the first front roller and the first rear roller, and the first rear roller is located between the second front roller and the second rear roller, and the base paper web forms a continuous first section, a second section and a third section between the first front roller and the second rear roller, wherein the second section is clamped by the first transfer belt and the second transfer belt.

[0020] Wherein, the first abutment section is U-shaped, and the second abutment section is inverted U-shaped.

[0021] Wherein, the drying unit includes a drying roller, and the drying roller also includes a hot air box arranged on the outside of the drying roller, and the hot air box is configured to blow a hot air flow toward the wet embossed paper web. The drying roller also includes a side wall and a cavity formed by the side wall, and a suction box is arranged in the cavity, and the side wall includes a plurality of through holes.

[0022] Beneficial effects: The utility model provides a high-bulk embossing device, comprising: at least one humidifying unit, for humidifying a base paper web to form a wet paper web; an embossing roller group, arranged downstream of the humidifying unit, for embossing the wet paper web to form a wet embossed paper web; a drying unit, arranged downstream of the embossing roller group, for drying the embossed paper web to form a dry embossed paper web; wherein the humidifying unit comprises a transfer belt wound around a plurality of rollers and a nozzle for spraying water on the transfer belt, the transfer belt comprises a resistance section that resists the base paper web, the resistance section is configured to humidify the base paper web in contact with the resistance section, through the above arrangement, the wetting process of water on the paper can be prolonged, and at the same time this method can make the distribution of water more uniform, thereby ensuring the accuracy of the added amount, and is not prone to unexpected paper breaks, thereby increasing the production speed, and at the same time this method can further increase the bulk of the paper. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A schematic diagram of the structure of a high bulk thickness embossing device of the utility model;

[0024] Figure 2 for Figure 1 A magnified schematic diagram of area A;

[0025] Figure 3 is a schematic diagram of the transfer belt structure;

[0026] Figure 4 It is a schematic structural diagram of a high bulk thickness embossing device in another embodiment;

[0027] Base paper web 11; wet paper web 12, 53; first section 121; second section 122; third section 123; wet embossed paper web 13; dry embossed paper web 14; first humidifying unit 21, 61; first transfer belt 210; first conflict section 2100; middle zone 2101; side zone 2102; drive belt 2103; clamping piece 2104; bolt 2105; first front idler 211; first rear idler 212; first middle idler 213; clamping roller 214; drive wheel 215; nozzle 216; second humidifying unit 22, 62; second transfer belt 220; second conflict section 2200; second front idler 221; second rear idler 222; embossing roller group 30; embossing roller 31; bottom roller 32; drying roller 41; hot air box 42; suction air box 43, paper layers 51, 52. DETAILED DESCRIPTION

[0028] The embodiment of the utility model provides a high bulk embossing device, and the application will be further described below with reference to the accompanying drawings.

[0029] At the same time, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0030] Please refer to the attached Figure 1 to Figure 2 The high bulk embossing device includes at least one humidifying unit and an embossing roller group 31 30 arranged downstream of the humidifying unit, and a drying unit.

[0031] The humidifying unit is used to humidify the base paper web 11 to form a wet paper web 12. It can be understood that a unwinding unit can also be included upstream of the humidifying unit to lay out the base paper web 11. Usually, the base paper web 11 is wound on a tubular body such as a paper core tube to form a paper roll. The unwinding unit includes an unwinding rack for placing the paper roll and a laying device for releasing the base paper web 11 from the paper roll. The structure of these laying devices can be used, such as a laying belt that drives the paper roll by friction, which will not be described in detail here.

[0032] At least one humidifying unit is provided. In the present embodiment, the humidifying unit includes a first humidifying unit 21 and a second humidifying unit 22 which are respectively provided on both sides of the base paper web 11. The first humidifying unit 21 and the second humidifying unit 22 humidify the base paper web 11 on the corresponding side respectively. In addition, the second humidifying unit 22 has substantially the same structure as the first humidifying unit 21. Only the first humidifying unit 21 will be described in detail below.

[0033] The first humidifying unit 21 includes a first transfer belt 210 wound around a plurality of rollers and a nozzle 216 for spraying water on the first transfer belt 210, the rollers include a first front roller 211 and a first rear roller 212 adjacent to the base paper web 11, the first transfer belt 210 includes a first contact section 2100 located between the first front roller 211 and the first rear roller 212. It can be understood that the first contact section 2100 contacts the base paper web 11, and when the first transfer belt 210 carries water, the base paper web 11 is moistened at the first contact section 2100, that is, the base paper web 11 is moistened to form a wet paper web 12.

[0034] Specifically, the first transfer belt 210 can be water-permeable or water-impermeable. When the first transfer belt 210 is water-permeable, the first transfer belt 210 can be a felt cloth or a blanket cloth, that is, the water-containing felt cloth or blanket cloth carries water to moisten the base paper web 11. When the first transfer belt 210 is water-impermeable, the first transfer belt 210 can be a rubber band, a plastic film or a metal belt. A water film is formed on the surface of the first transfer belt 210, and the water film in the first contact section 2100 contacts the base paper web 11, so that the base paper web 11 is moistened to form a wet paper web 12.

[0035] Furthermore, the first transfer belt 210 includes a first surface facing the nozzle 216, and the nozzle 216 is configured to spray water onto the first surface. It can be understood that in other embodiments, the water can also be other liquids, such as aqueous solutions, more specifically aqueous solutions with functional materials added, so that the embossed paper web has corresponding functions. The functional materials can be moisturizers, bactericides, etc., which are not limited here.

[0036] Furthermore, the first humidifying unit 21 further comprises a first middle roller 213 located upstream of the first abutting section 2100 and a first clamping roller 214 arranged corresponding to the first middle roller 213, wherein the first clamping roller 214 abuts against the first surface, and the first clamping roller 214 is configured to apply adjustable pressure to the first surface to flatten the water on the first surface and adjust the thickness of the water film or adjust the moisture content on the first transfer belt 210, so that the formed wet paper web 12 has a predetermined moisture content. More specifically, when the When the first transfer belt 210 is made of a water-tolerant material, the clamping force between the first clamping roller 214 and the first middle roller 213 is adjusted to adjust the squeezing force on the first transfer belt 210, thereby adjusting the moisture content on the first transfer belt 210 to adjust the wetness of the base paper web 11. When the first transfer belt 210 is made of a water-impermeable material, the clamping force between the first clamping roller 214 and the first middle roller 213 is adjusted to flatten the water film on the one hand and adjust the thickness of the water film on the other hand, thereby adjusting the wetness of the base paper web 11.

[0037] Furthermore, the surface of the first clamping roller 214 is smooth.

[0038] It can be understood that the first transfer belt 210 is in an endless ring shape and is configured to move continuously under the drive of a driving device. In this embodiment, the driving device includes a driving wheel 215, and the first transfer belt 210 is wound around the driving wheel 215 and rollers.

[0039] Please refer to Figure 3 ,exist Figure 3 The figure shows a structure of a first transfer belt 210, wherein the first transfer belt 210 includes a middle area 2101 and a side area 2102, and the driving device further includes a driving belt 2103, wherein the driving belt 2103 is wound around a driving wheel 215, and the first transfer belt 210 is fixedly connected to the driving belt 2103. In this embodiment, the side area 2102 of the first transfer belt 210 is connected to the driving belt 2103 via a connecting device, and the connecting device includes a clip 2104 and a bolt 2105 passing through the clip 2104 and the driving belt 2103.

[0040] It can be understood that the clamping piece 2104 and the driving belt 2103 are respectively located at the upper and lower sides of the first transfer belt 210 , and clamp and fix the first transfer belt 210 .

[0041] Furthermore, the driving device also includes a clamping block, which is located on the lower side of the driving belt 2103. One end of the bolt 2105 passes through the clamping piece 2104, the first transfer belt 210 and the driving belt 2103 and is connected to the clamping block to more stably fix the first transfer belt 210.

[0042] Furthermore, the driving belt 2103 is a synchronous belt, and the driving wheel 215 is a synchronous pulley.

[0043] It can be understood that in this case, the side of the roller is also provided with a pulley matching the driving belt 2103. At the same time, with this structure, on the one hand, a thinner and larger first transfer belt 210 can be used, and on the other hand, the movement of the first transfer belt 210 is smoother and there will be no unexpected position changes, thereby making the wetting condition of the wet paper web 12 stable and uniform.

[0044] The second humidifying unit 22 is arranged back to back with the first humidifying unit 21. Specifically, the base paper web 11 includes an upper surface and a lower surface. In this embodiment, the first humidifying unit 21 is adjacent to the lower surface, and the first contact section 2100 contacts the lower surface. The second humidifying unit 22 includes a second contact section 2200, and the second contact section 2200 contacts the upper surface, so that the base paper web 11 is moistened from the lower surface and the upper surface respectively by the first humidifying unit 21 and the second humidifying unit 22.

[0045] Please refer to Figure 4 ,exist Figure 4 In another embodiment shown in FIG. 1 , the base paper web comprises two paper layers ( 51 , 52 ), and the first humidifying unit 61 and the second humidifying unit 62 respectively moisten the two paper layers ( 51 , 52 ) to form a wet paper web 53 .

[0046] It can be understood that the second humidifying unit 22 includes a second front roller 221, a second rear roller 222 and a second transfer belt 220, wherein the second front roller 221 is located between the first front roller 211 and the first rear roller 212, and the first rear roller 212 is located between the second front roller 221 and the second rear roller 222, so that the paper web forms three continuous sections between the first front roller 211 and the second rear roller 222, namely, the first section 121 between the first front roller 211 and the second front roller 221, the second section 122 between the second front roller 221 and the first rear roller 212. 122, the third section 123 between the first rear roller 212 and the second rear roller 222. It can be understood that the first section 121 is moistened by the first humidifying unit 21, the second section 122 is moistened by the first humidifying unit 21 and the second humidifying unit 22, and the third section 123 is moistened by the second humidifying unit 22. Through the above arrangement, the entire base paper web 11 can have a better wetting effect. At the same time, this method prolongs the time that the base paper web 11 contacts the transfer belt, so that the base paper web 11 can obtain a good and uniform wetting effect after leaving the humidifying unit, avoiding the situation of partial drying and partial wetting.

[0047] Furthermore, in the second section 122 , the first transfer belt 210 and the second transfer belt 220 are sandwiched and moistened.

[0048] Furthermore, the first section 121 , the second section 122 , and the third section 123 have the same length.

[0049] Furthermore, the first interference section 2100 is U-shaped, and similarly, the second interference section 2200 is inverted U-shaped, so that the first transfer belt 210 and the second transfer belt 220 clamp the original paper web 11 in the second section 122. It can be understood that in order to make the first interference section 2100 and the second interference section 2200 U-shaped or inverted U-shaped, the contact point between the second front roller 221 and the second transfer belt 220 can be set to be located at the lower side of the line connecting the contact points of the first front roller 211, the first rear roller 212 and the first transfer belt 210, and the contact point between the first rear roller 212 and the first transfer belt 210 is set to be located at the upper side of the line connecting the contact points of the second front roller 221, the second rear roller 222 and the second transfer belt 220.

[0050] The embossing roller group 31 30 is arranged downstream of the humidifying unit and is used for embossing the wet paper web 12 to form a wet embossed paper web 13. The embossing roller group 31 30 includes an embossing roller 31 and a bottom roller 32. The embossing roller 31 is provided with a predetermined embossing protrusion to form a predetermined embossing pattern on the wet paper web 12. In the present embodiment, the embossing roller group 31 30 can be in the form of point-to-point, point-to-flat or point-to-concave embossing, which is not limited here.

[0051] The drying unit is arranged downstream of the embossing roller group 31 30 and is used to dry the wet embossed paper web 13 to form a dry embossed paper web 14. In this embodiment, the drying unit includes a drying roller 41. When the wet embossed paper web 13 passes through the drying roller 41, it is dried by the drying roller 41 to form a dry embossed paper web 14.

[0052] Furthermore, the drying roller 41 further comprises a hot air box 42 disposed outside the drying roller 41, and the hot air box 42 is configured to blow hot air flow toward the wet embossed paper web 13, thereby drying the wet embossed paper web.

[0053] Furthermore, the drying roller 41 also includes a side wall and a cavity portion formed by the side wall, a suction box 43 is arranged in the cavity portion, the side wall includes a plurality of through holes, the suction box 43 is connected to the negative pressure device, and a negative pressure is formed in the suction box 43, so that the water-containing air flow can be discharged through the suction box 43 on the one hand, and the drying process is accelerated by the negative pressure effect on the other hand.

[0054] The above description is only an implementation method of the present utility model, and does not limit the patent scope of the present utility model. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present utility model, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present utility model.

Claims

1. A high bulk embossing device, characterized in that: include: at least one humidifying unit, used for humidifying the base paper web to form a wet paper web; An embossing roller group is arranged downstream of the humidifying unit and is used for embossing the wet paper web to form a wet embossed paper web; A drying unit, disposed downstream of the embossing roller group, for drying the embossed paper web to form a dry embossed paper web; The humidifying unit comprises a transfer belt wound around a plurality of rollers and a nozzle for spraying water on the transfer belt, the transfer belt comprises a conflicting section for conflicting with the base paper web, and the conflicting section is configured to humidify the base paper web in contact with the conflicting section.

2. The high bulk embossing device according to claim 1, characterized in that: The transfer belt is water-permeable or water-impermeable. When the transfer belt is water-permeable, the transfer belt is felt cloth or blanket cloth. When the transfer belt is water-impermeable, the transfer belt is elastic band, plastic film or metal band.

3. The high bulk embossing device according to claim 1, characterized in that: The base paper web includes an upper surface and a lower surface, the humidifying unit includes a first humidifying unit, the first humidifying unit includes a first front roller, a first rear roller and a first transfer belt, the first transfer belt includes a first friction section located between the first front roller and the first rear roller, the first friction section frictionally contacts the lower surface, and the nozzle is arranged upstream of the first friction section.

4. The high bulk embossing device according to claim 3, characterized in that: The first transfer belt includes a first surface facing the side of the base paper web, and the first humidifying unit also includes a first middle roller located upstream of the first contact section and a first clamping roller arranged corresponding to the first middle roller, wherein the first clamping roller contacts the first surface, and the first clamping roller is configured to apply adjustable pressure to the first surface.

5. The high bulk embossing device according to claim 3, characterized in that: The first transfer belt is in an endless ring shape and is configured to move continuously under the drive of a driving device. The driving device includes a driving wheel, and the first transfer belt is wound around the driving wheel and a roller.

6. The high bulk embossing device according to claim 5, characterized in that: The first transfer belt includes a middle area and a side area, and the driving device also includes a driving belt. The driving belt is wound around the driving wheel. The side area of ​​the first transfer belt is connected to the driving belt through a connecting device, and the connecting device includes a clip and bolts passing through the clip and the driving belt.

7. The high bulk embossing device according to claim 3, characterized in that: The humidifying unit further comprises a second humidifying unit, the second humidifying unit and the first humidifying unit are arranged back to back, the second humidifying unit comprises a second abutting section, and the second abutting section abuts against the upper surface.

8. The high bulk embossing device according to claim 7, characterized in that: The second humidifying unit comprises a second front roller, a second rear roller and a second transfer belt, the second front roller is located between the first front roller and the first rear roller, and the first rear roller is located between the second front roller and the second rear roller, the base paper web forms a continuous first section, a second section and a third section between the first front roller and the second rear roller, wherein the second section is clamped by the first transfer belt and the second transfer belt.

9. The high bulk embossing device according to claim 8, characterized in that: The first abutment section is U-shaped, and the second abutment section is inverted U-shaped.

10. The high bulk embossing device according to claim 1, characterized in that: The drying unit includes a drying roller, and the drying roller also includes a hot air box arranged on the outside of the drying roller, and the hot air box is configured to blow a hot air flow toward the wet embossed paper web. The drying roller also includes a side wall and a cavity formed by the side wall, and a suction box is arranged in the cavity, and the side wall includes a plurality of through holes.

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