Low-vibration core tube

Abstract

The utility model discloses an embodiment provides a kind of low vibration core pipe, including ontology, the ontology includes base body part and cladding, the cladding is covered in the outer surface of base body part, cladding is elastomer, the cladding has 1~5mm thickness, reach the following effect by above setting: one, by the cladding of cladding, form protective layer on base body part, greatly reduce the phenomenon of warping or fuzzing;Two, when base body part is high hardness and high rigidity material, by the cladding of cladding, greatly reduce the vibration of core pipe;Three, this setting mode increases the friction of thin material, it can also further by the form of electrostatically attached to cladding on thin material, so as to avoid using adhesive, in addition, when low vibration core pipe is not expected to drop, reduce the impact of low vibration core pipe, reduce the probability of low vibration core pipe damage or equipment damage.

Description

Technical Field

[0001] This utility model relates to a low-vibration core tube. Background Technology

[0002] Paper core tubes are widely used in the field of household paper. For example, paper core tubes are needed for winding during the initial roll formation process and during the rewinding process. Smaller-sized paper core tubes are needed in the finished rolls of paper.

[0003] The core tubes used in the initial and rewinding processes are typically large-sized, such as 7-inch or 10-inch core tubes. These core tubes usually need to be reused frequently to reduce usage costs. Please refer to the appendix. Figure 1 These paper core tubes have the following problems: when reused multiple times, the edges of the paper core tube body are prone to curling or fuzzing. At the same time, because the paper core tube is made of multiple layers of paper stacked at an inclined angle and then cut to form the tip, the curling problem is more likely to occur, which will lead to damage to the paper core tube body and make the paper core tube unusable.

[0004] To address this, people have proposed using materials such as plastic to prepare paper core tubes. When plastic materials are used to prepare paper core tubes, the problem of edge fuzzing is greatly alleviated, but new problems arise: plastic core tubes usually need to be configured with high hardness and rigidity. On the one hand, vibration is obvious during use, especially when there is less tissue paper covering the surface of the core tube, which makes vibration problems particularly easy to occur. On the other hand, when the core tube is dropped, the high hardness and high rigidity will cause irreparable damage to the edges.

[0005] Therefore, a new technical solution is needed that simultaneously satisfies the requirements of low vibration and high reusability. Utility Model Content

[0006] Therefore, this utility model provides a low-vibration core tube to solve the above-mentioned technical problems.

[0007] A low-vibration core tube includes a body, the body comprising a base portion and a covering layer, the covering layer covering the outer surface of the base portion, the covering layer being an elastomer, and the covering layer having a thickness of 1-5 mm.

[0008] The base portion is a paper tube with a central hole formed by winding at least one layer of paper tape, or a plastic paper tube formed by extrusion of plastic, or a plastic tube formed by molding of plastic.

[0009] The coating layer has several protrusions, which are hemispherical in shape, with a height of 0.3 to 0.7 mm and a distribution density of 4 to 20 protrusions per cm² on the outer surface of the coating layer.

[0010] The body includes an end face, the covering layer includes an edge region adjacent to the end face and a central region away from the end face, and the protrusion includes a first protrusion located in the edge region and a second protrusion located in the central region, wherein the distribution density of the first protrusion in the edge region is greater than the distribution density of the second protrusion in the central region.

[0011] The distribution density of the first protrusion in the edge region is 12-20 per cm², and the distribution density of the second protrusion in the middle region is 4-8 per cm².

[0012] The first protrusion and the second protrusion have the same height, and the diameter of the first protrusion is smaller than that of the second protrusion. The edge area has a length greater than 3 cm.

[0013] The edge area is provided with at least one inner rib, which is ring-shaped and sleeved on the base. The inner rib is 2-5 cm away from the end face.

[0014] The substrate has a spiral inner groove on its surface, and the covering layer has a spiral outer groove. The spiral direction of the outer groove is opposite to that of the inner groove, and the projection of the outer groove onto the surface of the substrate intersects with the inner groove.

[0015] The outer groove has a depth of 0.3 to 0.5 mm, the helix of the outer groove has the same pitch as the helix of the inner groove, and the inclination angle of the outer groove and the inner groove are both 45° to 55°.

[0016] In this case, at least a portion of the coating layer is embedded in the inner groove.

[0017] The coating layer is provided with several V-shaped annular grooves.

[0018] Beneficial Effects: This utility model embodiment provides a low-vibration core tube, including a body, which includes a base portion and a covering layer. The covering layer covers the outer surface of the base portion and is an elastomer with a thickness of 1-5 mm. The above configuration achieves the following effects: 1. By covering the base portion, a protective layer is formed, significantly reducing edge warping or fraying; 2. When the base portion is a high-hardness and high-rigidity material, the covering layer significantly reduces the vibration of the core tube; 3. This configuration increases friction with thin materials and allows for further adhesion of thin materials to the covering layer by applying electrostatic force, thus avoiding the use of adhesives. Additionally, it reduces the impact on the low-vibration core tube when it falls unexpectedly, lowering the probability of damage to the low-vibration core tube or equipment. Attached Figure Description

[0019] Figure 1Schematic diagram of the low-vibration core tube of the first embodiment of this utility model;

[0020] Figure 2 for Figure 2 Schematic diagram of the cross section at point AA;

[0021] Figure 3 for Figure 3 Enlarged diagram of area C;

[0022] Figure 4 for Figure 2 Schematic diagram of the cross section at point BB;

[0023] Figure 5 A schematic diagram of the device for forming the protrusion;

[0024] Figure 6 A cross-sectional view of the low-vibration core tube in the second embodiment.

[0025] Component descriptions in the diagram:

[0026] Body 20; end face 200; edge area 201; middle area 202; base part 21; inner groove 211; covering layer 22, 42; outer groove 221; protrusion 222; first protrusion 2221; second protrusion 2222; inner rib 2223; mandrel 31; pressure roller 32; annular groove 420. Detailed Implementation

[0027] Please refer to Figures 1-3 This utility model provides a low-vibration core tube for forming a roll of thin material on the core tube. The low-vibration core tube typically has an inner diameter of 3 inches, 7 inches, or 10 inches. Of course, other inner diameters are also possible and are not limited here. The thin material can be household paper, non-woven fabric, film, etc., and is not limited here.

[0028] The low-vibration core tube includes a body 20, which includes a base portion 21 and a covering layer 22. The base portion 21 is cylindrical. Specifically, the base portion 21 can be a paper tube with a central hole formed by winding at least one layer of paper tape, or a plastic paper tube formed by extrusion of plastic, or a plastic tube formed by molding of plastic.

[0029] The covering layer 22 covers the outer side of the base portion 21, where the outer side refers to the side of the base portion 21 facing away from the central hole. It is understood that the central hole is used to pass through a mandrel 31 to wind thin material on a rewinder or release thin material on an uncoiler.

[0030] The present application will be further described below with reference to a specific embodiment of a paper tube formed by winding paper tape in the base part 21.

[0031] Specifically, the base portion 21 can be formed by a winding device. Specifically, the winding device includes a winding section and a slitting section. The winding section is used to wind the paper strip to form a continuous paper tube, and the slitting section is used to slit the continuous paper tube to form the base portion 21 with a central hole.

[0032] The winding section includes a central shaft and a driving device. The driving device is configured to drive the paper strip to rotate and wind around the central shaft to form a tubular paper tube, while simultaneously driving the paper tube to slide downstream along the axis of the central shaft.

[0033] The central shaft is generally cylindrical in shape. The driving device includes a pair of rollers and a belt wound around the pair of rollers. The belt is driven by the pair of rollers. At least a portion of the belt is wound around the central shaft at an inclined angle. The paper tape enters and is wound around the central shaft at a predetermined inclined angle. The portion of the belt wound around the central shaft winds and holds the paper tape. It can be understood that when the belt moves under the drive of the rollers, the paper tape will spirally wind along the axial direction of the central shaft and form a paper tube.

[0034] Furthermore, the paper tape includes a first paper tape and a second paper tape. The first paper tape and the second paper tape form a base portion 21 including a first paper layer and a second paper layer. It is understood that the first paper tape can form a first paper layer, and the second paper tape can form a second paper layer. The first paper tape and the second paper tape are stacked, and the first paper tape is located above the second paper tape, so that the formed first paper layer is located on the outside and the second paper layer is located on the inside.

[0035] The inner side of the second paper strip is wound around the outer wall of the central shaft. At the same time, the outer side of the second paper strip is coated with adhesive. The first paper strip is wound around and bonded to the second paper strip with adhesive. The first and second paper strips move synchronously during the winding process so that the formed paper tube has a stable structure.

[0036] The coating layer 22 is an elastomer. Specifically, the coating layer 22 is formed of polyurethane (PU) or nitrile rubber (NBR). The coating layer 22 has a thickness of 1 to 5 mm and includes an outer surface.

[0037] Furthermore, a number of protrusions 222 are provided on the outer surface of the covering layer 22.

[0038] By providing a covering layer 22 on the substrate 21, and the covering layer 22 being an elastomer, the following effects are achieved:

[0039] First, by covering the substrate 21 with the coating layer 22, a protective layer is formed, which makes it less likely for the edges of the body 20 to curl or fray. In practice, the curling or fraying phenomenon is reduced by more than 83%.

[0040] 2. When the base part 21 is made of high hardness and high rigidity material, the vibration of the core tube is greatly reduced by the covering layer 22. In practice, when the base part 21 is made of HDPE and the hardness is greater than HRC40, the vibration is reduced by 67% when covered with 2mm polyurethane (PU).

[0041] Thirdly, by setting the covering layer 22 and the protrusions 222 on the covering layer 22, the friction with the thin material is increased on the one hand, and the thin material can be attached to the covering layer 22 by applying static electricity, thereby avoiding the use of adhesive and greatly improving the reusability of the low vibration core tube. On the other hand, by setting the protrusions 222, when adhesive is used, the amount of adhesive used can be reduced, and the roll head can be easily peeled off and damage to the surface of the low vibration core tube can be reduced.

[0042] Fourth, in addition, when the low-vibration core tube falls unexpectedly, the impact on the low-vibration core tube is reduced, thus reducing the probability of damage to the low-vibration core tube or equipment.

[0043] Furthermore, the protrusion 222 is a hemispherical protrusion 222 with a height of 0.3-0.7 mm. The distribution density of the protrusion 222 on the outer surface of the coating layer 22 is 4-20 per cm². In a preferred embodiment, the height of the protrusion 222 is 0.5 mm and the distribution density of the protrusion 222 is 8 per cm². In this case, on the one hand, the friction force and material flatness can be balanced; on the other hand, it will not cause indentation on the material and has sufficient friction gain; and on the other hand, it has sufficient wear resistance to ensure service life.

[0044] Furthermore, the thickness of the covering layer 22 is greater than 2 mm to provide sufficient wear tolerance.

[0045] Please refer to the following for further details. Figure 5 The body 20 includes an end face 200, and the covering layer 22 includes an edge region 201 adjacent to the end face 200 and a central region 202 away from the end face 200. It is understood that each body 20 includes a pair of end faces 200, so that there is also a pair of edge regions 201. At the same time, the central region 202 is located between the pair of edge regions 201. The edge region 201 includes a first protrusion 2221, and the central region 202 includes a second protrusion 2222. The distribution density of the first protrusion 2221 in the edge region 201 is greater than the distribution density of the second protrusion 2222 in the central region 202. This arrangement improves the wear resistance and strength of the body 20 in the edge region 201 area and extends its service life.

[0046] Furthermore, the distribution density of the first protrusion 2221 in the edge region 201 is 12 to 20 per cm², and the distribution density of the second protrusion 2222 in the central region 202 is 4 to 8 per cm².

[0047] Furthermore, the first protrusion 2221 and the second protrusion 2222 have the same height, and the diameter of the first protrusion 2221 is smaller than that of the second protrusion 2222.

[0048] Furthermore, the edge region 201 has a length greater than 3 cm, preferably, the edge region 201 has a length of 5 to 25 cm.

[0049] Furthermore, the edge region 201 is also provided with at least one inner rib 2223, which is ring-shaped and sleeved on the base part 21. At the same time, the inner rib 2223 is 2-5cm away from the end face 200. By further providing the inner rib 2223, the strength of the edge region 201 is further enhanced, the occurrence of edge warping in the edge region 201 is reduced, and the base part 21 on the inner side is protected.

[0050] Please refer to this as well. Figure 1 When the base portion 21 is formed using paper tape, a spiral inner groove 211 is formed on the surface of the base portion 21 during the formation process. A spiral outer groove 221 is also provided on the covering layer 22. The spiral direction of the outer groove 221 is opposite to that of the inner groove 211, and the projection of the outer groove 221 on the surface of the base portion 21 intersects with the inner groove 211. Studies have found that this method can make the covering layer 22 more stably held on the base portion 21 and make the rotation process of the body 20 more stable.

[0051] Furthermore, the depth of the outer groove 221 is 0.3 to 0.5 mm. It can be understood that the pitch of the helix of the outer groove 221 is equal to that of the helix of the inner groove 211. At the same time, the inclination angle of the outer groove 221 and the inner groove 211 is 45° to 55°.

[0052] Please refer to the following for further details. Figure 6 ,exist Figure 6 The figure shows the cross-sectional shape of the coating layer 42 in the third embodiment. In the third embodiment, the coating layer 42 also includes a plurality of V-shaped annular grooves 420. By setting the V-shaped annular grooves, the damage to the coating layer caused by steel blades can be reduced when paper is cut, or the damage to the coating layer can be reduced even when using a high-pressure water jet.

[0053] Furthermore, the annular grooves 420 are equidistantly arranged along the axis of the central hole.

[0054] Furthermore, the annular groove 420 has a depth of more than 1 mm.

[0055] Please refer to this as well. Figure 5 ,exist Figure 5 The diagram shows an apparatus for forming the outer groove 221 and the protrusion 222. The apparatus includes a mandrel 31 passing through the body 20 and a pressure roller 32 disposed on the outside of the body 20. Embossing protrusions 222 and recesses are provided on the surface of the pressure roller 32, wherein the embossing protrusions 222 correspond to the shape of the outer groove 221 and the recesses correspond to the shape of the protrusions 222. At the same time, the pressure roller 32 also includes a heating device to heat the covering layer 22 while applying pressure to the low-vibration core tube, thereby stably forming the protrusions 222 and the outer groove 221 during the embossing process. It can be understood that in this way, the covering layer 22 can also be further stably fixed to the surface of the base portion 21.

[0056] Additionally, it is understood that the mandrel 31 can be an air shaft.

[0057] Furthermore, the above method allows at least a portion of the covering layer 22 to be embedded in the inner groove 211, thereby making the covering layer 22 and the base 21 form an integral whole and maintaining stability during rotation.

[0058] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A low-vibration core tube, comprising a body, said body including a base portion and a covering layer, characterized in that, The coating layer is applied to the outer surface of the substrate. The coating layer is an elastomer and has a thickness of 1 to 5 mm. The surface of the substrate has a spiral inner groove, and the coating layer also has a spiral outer groove. The spiral direction of the outer groove is opposite to that of the inner groove, and the projection of the outer groove onto the surface of the substrate intersects with the inner groove.

2. The low-vibration core tube as described in claim 1, characterized in that, The base portion is a paper tube with a central hole, formed by winding at least one layer of paper tape, or a plastic paper tube formed by extrusion of plastic, or a plastic tube formed by molding of plastic.

3. The low-vibration core tube as described in claim 1, characterized in that, A number of protrusions are provided on the coating layer. The protrusions are hemispherical, with a height of 0.3 to 0.7 mm and a distribution density of 4 to 20 protrusions / cm² on the outer surface of the coating layer.

4. The low-vibration core tube as described in claim 3, characterized in that, The body includes an end face, the covering layer includes an edge region adjacent to the end face and a central region away from the end face, and the protrusion includes a first protrusion located in the edge region and a second protrusion located in the central region, wherein the distribution density of the first protrusion in the edge region is greater than the distribution density of the second protrusion in the central region.

5. The low-vibration core tube as described in claim 4, characterized in that, The first protrusion and the second protrusion have the same height, and the diameter of the first protrusion is smaller than that of the second protrusion. The edge area has a length greater than 3 cm.

6. The low-vibration core tube as described in claim 4, characterized in that, The edge area is also provided with at least one inner rib, which is ring-shaped and sleeved on the base. At the same time, the inner rib is 2-5 cm away from the end face.

7. The low-vibration core tube as described in claim 1, characterized in that, The depth of the outer groove is 0.3 to 0.5 mm, the pitch of the helix of the outer groove is equal to that of the helix of the inner groove, and the inclination angle of the outer groove and the inner groove is 45° to 55°.

8. The low-vibration core tube as described in claim 7, characterized in that, At least a portion of the coating layer is embedded in the inner groove.

9. The low-vibration core tube as described in claim 1, characterized in that, The coating layer is provided with several V-shaped annular grooves.

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