A thin sheet material splicing mechanism

Abstract

The present invention provides a sheet material splicing mechanism, comprising two rollers matched with each other, characterized in that an arc-shaped protrusion is provided on the roller surface of at least one roller. The new and old sheet materials entering between the two rollers are rolled and spliced, and a splicing section with a certain width that gradually transitions from one side to the other side is spliced ​​in the width direction, so that when passing through the relevant equipment of the subsequent process, only 3-35% of the thickened part passes, and the rest are all single-layered, which completely solves the problems of blockage and the diameter of the tobacco base rod exceeding the regulations, and at the same time ensures the tensile strength of the splicing section, and the inclined splicing section is completed by rolling once, which simplifies the equipment structure and meets the requirements of the geometric size and taste of the tobacco base rod in the subsequent process, providing reliable technical support for the production of heat-not-burn cigarette products.

Description

Technical Field

[0001] The invention relates to a strip material splicing mechanism, in particular to a heat-not-burn tobacco sheet splicing mechanism, and belongs to the technical field of extrusion splicing device design and manufacturing. Background Art

[0002] In the packaging materials, tobacco processing and other industries, most of the raw and auxiliary materials are supplied in the form of rolled thin sheets. Some of the thin sheets can be used as wrapping materials for rods, such as cigarette paper, and some can be used as filling materials for rods, such as tobacco base rods. In actual production, when thin sheets are required to be used as wrapping paper or as filling tobacco base rods, their circumferential diameter must be within a certain size range. In order to ensure the continuous supply of thin sheets, it is usually necessary to splice the tail of the old thin sheet material that is about to be used up with the head of the new thin sheet material.

[0003] However, the existing technology of splicing with auxiliary materials or splicing without auxiliary materials has the following shortcomings to a greater or lesser extent:

[0004] 1) The thickness of the splicing section between the new and old sheet materials will inevitably increase, and the thickness is 2 times or more than the thickness of the single-layer sheet material. Such a splicing thickness will cause the diameter of the tobacco base rod produced by the downstream equipment to exceed the allowed range, resulting in the appearance of unqualified products. At the same time, it will also cause the downstream equipment to be blocked, and even shut down for maintenance, so it cannot meet the requirements of the production process;

[0005] 2) The addition of adhesives to splice together products with auxiliary materials may change the taste of the final product and even cause food safety accidents;

[0006] 3) The tensile strength of the joint section between the new and old sheet materials is much lower than that of normal sheet materials, and cannot meet the tensile strength requirements of the heat-not-burn cigarette production process for tobacco sheet materials.

[0007] The reason why the splicing of the prior art results in an increase in the thickness of the splicing section of the new and old thin sheet materials, which in turn causes the diameter of the tobacco base rod to exceed the allowable value, causes blockage of downstream equipment, and reduces the tensile strength of the thin sheet material, is because the existing splicing mechanism can only complete the horizontal overlap of the two thin sheets, that is, the splicing section is a horizontal band of a certain width, so that the thickness of each cross section of the splicing section is doubled or even more than the original basis, which will inevitably affect the diameter of the tobacco base rod in the subsequent process, cause blockage due to the need to pass through related equipment at the same time, and reduce the tensile strength of the splicing section.

[0008] Therefore need to develop a kind of sheet material splicing mechanism that can solve all of above-mentioned problems simultaneously. Summary of the invention

[0009] The object of the present invention is to provide a splicing mechanism which can form a slanted section of a new sheet material and an old sheet material splicing section at one time.

[0010] The present invention is accomplished through the following technical solutions: a sheet material splicing mechanism, comprising two rollers matched with each other, characterized in that an arc-shaped protrusion is provided on the roller surface of at least one roller, so that through the coordinated extrusion of the two rollers, especially through the arc-shaped protrusion, the new and old sheet materials entering between the two rollers form an inclined splicing section that gradually transitions from one end to the other end in the width direction at one time.

[0011] The arc-shaped protrusion is a spiral line protrusion, or a bent wave line protrusion, or a curve protrusion with a continuous and smooth transition.

[0012] The surface of the arc-shaped protrusion is provided with a plurality of independent concave-convex teeth at intervals or continuously, and the plurality of independent concave-convex teeth are polygonal teeth, circular teeth or triangular teeth which are concave in the middle and convex on all sides, or polygonal teeth, circular teeth or triangular teeth which are convex in the middle and concave on all sides, and are single polygonal teeth, circular teeth or triangular teeth, or are at least two of crossed or alternating polygonal teeth, circular teeth and triangular teeth.

[0013] At least one end of the arc-shaped protrusion is provided with a straight section perpendicular to the running direction of the new and old sheet materials, which is used to remove the front and rear end waste materials during the splicing process to create favorable mechanical conditions.

[0014] The distance between the roller surface on the feeding side of the arc-shaped protrusion and the top surface of the arc-shaped protrusion is 0.3-2 times the thickness of the sheet material, so as to play a role of tension isolation during the splicing process, and at the same time prevent the tobacco sheet from producing plastic deformation, providing favorable conditions for quickly tearing off the waste at the head of the new sheet material and the tail of the old sheet material; a roller surface is provided on the discharge side of the arc-shaped protrusion, and the distance between the roller surface and the top surface of the arc-shaped protrusion is at least 2 times the thickness of the sheet material, so as to eliminate obstacles for quickly tearing off the waste at the head of the new sheet material and the tail of the old sheet material during the splicing process.

[0015] The discharge side of the arc-shaped protrusion is not provided with a roller surface, so as to eliminate obstacles for quickly tearing off the waste at the head of the new sheet material and the tail of the old sheet material during the splicing process.

[0016] The width of the arc-shaped protrusion is 3-35% of the width of the sheet material, so as to reduce the splicing area of ​​the splicing section as much as possible while ensuring that the splicing section has sufficient splicing strength.

[0017] The roller surface of the other roller of the two rollers is a flat surface.

[0018] The roller shafts of the two rollers are respectively provided with roller surfaces with the same cross-section being fan-shaped, and an arc-shaped protrusion is arranged on one of the roller surfaces, while the other roller surface is a plane.

[0019] The roller shafts of the two rollers are respectively connected to corresponding power machines so that they can rotate under the drive of their respective corresponding power machines, thereby rolling the new and old thin sheet materials entering between the two rollers and forming an inclined splicing section that gradually transitions from one end to the other end in the width direction.

[0020] The roller shafts of the two rollers are connected to a transmission mechanism, and the transmission mechanism is connected to a power machine, so that under the drive of the power machine, the two roller shafts and the rollers are driven to rotate synchronously through the transmission mechanism, thereby rolling the new and old thin sheet materials entering between the two rollers, and forming an inclined splicing section that gradually transitions from one end to the other end in the width direction.

[0021] By means of the splicing mechanism provided by the present invention, the new and old sheet materials entering between the two rollers are rolled and spliced, and a splicing section with a certain width gradually tilting from one side to the other side is spliced ​​in the width direction of the new and old sheet materials. After the sheet materials are unfolded, the splicing section becomes an oblique straight section or an oblique arc splicing section, and at least one end of the splicing section is a straight section parallel to the width direction of the new and old sheet materials, so that only 3-35% of the thickness of each cross section of the splicing section is double-layered (thick), and the rest is single-layered (thin). ), so when passing through the relevant equipment of the subsequent process, only 3-35% of the thickened part passes, and the rest pass through in a single layer, which completely solves the problem of blockage and the diameter of the tobacco base rod exceeding the regulations, while ensuring the tensile strength of the splicing section. Not only that, the inclined splicing section is completed by rolling at one time, without the use of bonding auxiliary materials, which not only greatly simplifies the process steps and equipment structure, but also meets the subsequent requirements of the geometric size and taste of the tobacco base rod, providing reliable technical support for the production of heat-not-burn cigarette products.

[0022] Obviously, the splicing mechanism provided by the present invention is also applicable to the splicing of other thin sheet materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the present invention;

[0024] Figure 2 for Figure 1 A magnified view of part A in FIG.

[0025] Figure 3 It is a schematic diagram of the application of the present invention;

[0026] Figure 4 for Figure 1 Partial view of new and old sheet materials with oblique joints processed in the structure shown

[0027] Figure 5 It is another schematic diagram of the roller surface structure of the present invention;

[0028] Figure 6 for Figure 5 Partial view of new and old sheet materials with oblique joint sections processed in the structure shown;

[0029] Figure 7 Another structural schematic diagram of the present invention. DETAILED DESCRIPTION

[0030] The present invention is further described below in conjunction with the accompanying drawings.

[0031] The sheet material splicing mechanism provided by the present invention comprises two rollers 511 and 521 matched with each other, wherein a roller surface of one roller 511 is provided with an arc-shaped protrusion 512, and the arc-shaped protrusion 512 is a spiral protrusion, and can obviously also be a curved wavy protrusion, or a continuous and smoothly transitioned curved protrusion; the roller surface of the other roller 521 is a plane;

[0032] The roller shafts 51 and 52 of the two rollers are respectively provided with roller surfaces 511 and 521 with the same cross-section being fan-shaped, and an arc-shaped protrusion 512 is provided on one of the roller surfaces 511, while the other roller surface 521 is a plane.

[0033] The surface of the arc-shaped protrusion 512 is provided with a plurality of independent concave and convex teeth at intervals, and the plurality of independent concave and convex teeth are all single quadrilateral teeth with a concave middle portion 5121 and convex surrounding portions 5122, and can obviously also be single circular teeth or triangular teeth with a concave middle portion and convex surrounding portions, or single polygonal teeth or circular teeth or triangular teeth with a convex middle portion and concave surrounding portions, or at least two of crossed or alternating polygonal teeth, circular teeth, and triangular teeth;

[0034] One end of the arc-shaped protrusion 512 is provided with a straight section 513 perpendicular to the running direction of the new and old thin sheet materials, which is used to remove the waste at the head of the new thin sheet material and the tail of the old thin sheet material during the splicing process to create favorable mechanical conditions;

[0035] The width of the arc-shaped protrusion 512 is 9% of the width C of the thin sheet material, so as to reduce the splicing area of ​​the splicing section B as much as possible while ensuring that the splicing section B has sufficient splicing strength;

[0036] The distance between the feed side roller surface 514 of the arc-shaped protrusion 512 and the top surface of the arc-shaped protrusion 512 is 0.5 times the thickness of the sheet material, so as to play a role in isolating tension during the splicing process, and prevent plastic deformation of the tobacco sheet, and eliminate obstacles for quickly tearing off the waste at the head of the new sheet material and the tail of the old sheet material;

[0037] A roller surface 515 is provided on the discharge side of the arc-shaped protrusion 512, and the distance between the roller surface 515 and the top surface of the arc-shaped protrusion 512 is at least twice the thickness of the thin sheet material, so as to eliminate obstacles for quickly tearing off the waste at the head of the new thin sheet material and the tail of the old thin sheet material during the splicing process;

[0038] In addition, the discharge side of the arc-shaped protrusion 512 is not provided with a roller surface. Figure 7 , so as to eliminate obstacles for quickly tearing off the waste at the head of the new sheet material and the tail of the old sheet material during the splicing process.

[0039] The roller shafts 51, 52 of the two rollers are respectively connected to corresponding power machines (not shown in the figure) so as to rotate under the drive of the corresponding power machines, thereby rolling the new and old sheet materials 3, 4 entering between the two rollers and forming an inclined splicing section B that gradually transitions from one end to the other end in the width direction;

[0040] Obviously, the roller shafts 51, 52 of the two rollers can also be connected to a conventional gear transmission mechanism or a belt transmission mechanism at the same time, and the gear transmission mechanism or the belt transmission mechanism is further connected to a power machine, so that under the drive of the power machine, the two roller shafts 51, 52 and the rollers 511, 521 are driven by the gear transmission mechanism or the belt transmission mechanism to rotate synchronously, thereby rolling the new and old sheet materials 3, 4 entering between the two rollers, and forming an inclined splicing section B that gradually transitions from one end to the other end in the width direction at one time.

[0041] The two rollers 511, 521 and the corresponding roller shafts 51, 52 and a conventional feeding device constitute a feeding and splicing unit. The feeding device includes new and old sheet material rolls 2, 1, which are respectively installed on corresponding reels 21, 11.

[0042] When working:

[0043] When the old sheet material roll 1 is about to be used up, its tail needs to be spliced ​​with the head of the new sheet material roll 2 to form a continuous sheet material;

[0044] When splicing:

[0045] 1) The tail of the old sheet material 4 and the head of the new sheet material 3 enter between the two rollers 511 and 521 together. After rolling and pressing by the two rollers, a splicing section B with a certain width gradually transitioning from one side to the other side is formed in the width direction C of the new and old sheet materials 3 and 4. The splicing section B becomes an oblique straight splicing section or an oblique arc splicing section after the sheet materials are unfolded;

[0046] 2) While the new and old sheet materials 3 and 4 are being spliced ​​together as in 1), once the two rollers 511 and 521 are in contact until they separate, the output torque of the reel 11 and the shaft 6 is gradually changed, so that the waste at the head of the new sheet material 3 and the tail of the old sheet material 4 can be torn off simultaneously and quickly.

[0047] The above description is only a specific example of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be within the protection scope of the present invention.

Claims

1. A sheet material splicing mechanism, comprising two rollers matched to each other, characterized in that At least one roller is provided with an arc-shaped protrusion on its surface, and the distance between the roller surface on the feeding side of the arc-shaped protrusion and the top surface of the arc-shaped protrusion is 0.3-2 times the thickness of the sheet material, so that the new and old sheet materials entering between the two rollers are spliced ​​into a splicing section that gradually inclines from one side to the other side in the width direction, and only 3-35% of the thickness of each cross section of the splicing section is double-layered, and the rest is single-layered.

2. The sheet material splicing mechanism according to claim 1, characterized in that The arc-shaped protrusion is a spiral line protrusion, or a bent wave line protrusion, or a curve protrusion with a continuous and smooth transition.

3. The sheet material splicing mechanism according to claim 1, characterized in that The surface of the arc-shaped protrusion is provided with a plurality of independent concave-convex teeth at intervals or continuously, and the plurality of independent concave-convex teeth are a single polygonal tooth or circular tooth or triangular tooth with a concave middle part and convex surroundings, or a single polygonal tooth or circular tooth or triangular tooth with a convex middle part and concave surroundings.

4. The sheet material splicing mechanism according to claim 1, characterized in that At least one end of the arc-shaped protrusion is provided with a straight section perpendicular to the running direction of the new and old sheet materials.

5. The sheet material splicing mechanism according to claim 1, characterized in that The distance between the discharge side roller surface of the arc-shaped protrusion and the top surface of the arc-shaped protrusion is at least twice the thickness of the sheet material.

6. The sheet material splicing mechanism according to claim 1, characterized in that The discharge side of the arc-shaped protrusion is not provided with a roller surface.

7. The sheet material splicing mechanism according to claim 1, characterized in that The width of the arc-shaped protrusion is 3-35% of the width of the sheet material.

8. The sheet material splicing mechanism according to claim 1, characterized in that The roller surface of the other roller of the two rollers is a flat surface.

9. The sheet material splicing mechanism according to claim 1, characterized in that The roller shafts of the two rollers are respectively provided with roller surfaces with the same cross-section being fan-shaped, and an arc-shaped protrusion is arranged on one of the roller surfaces, while the other roller surface is a plane.

10. The sheet material splicing mechanism according to claim 1, characterized in that The roller shafts of the two rollers are respectively connected to corresponding power machines; or the roller shafts of the two rollers are both connected to a transmission mechanism, and the transmission mechanism is connected to a power machine.

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