A tubular manufacturing apparatus

Abstract

The utility model provides a kind of tubular object manufacturing device, the device of the utility model includes: the first slitting assembly of original strip material is divided into at least one wide strip and at least two narrow strips;The glue assembly of one strip surface of the wide strip or narrow strip is coated with glue;The glue coating surface of each wide strip is bonded with at least two adjacent narrow strips with the way that narrow strip is in the same plane through glue coating surface to be double-layer bonded strip bonding assembly;The second slitting assembly of double-layer bonded strip is divided into double-layer strip along the gap between adjacent narrow strips;Forming assembly is curled into continuous double-layer tubular object with the axis parallel to the conveying direction of double-layer strip.This utility model's device effectively improves tubular object roundness, hardness, reduces raw material consumption, and the two layers of double-layer tubular object are completely consistent, can reduce product difference rate, improve product quality, while multi-channel parallel forming can multiply production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of hollow tubular material manufacturing technology, and in particular to a tubular material manufacturing device. Background Technology

[0002] Currently, tubular materials used in the straw industry are generally round straws, with paper straws typically manufactured using a spiral winding process. In the heated tobacco product industry, tubular materials such as hollow paper tubes are often used to process hollow filters or as part of a smoke diffuser. Both types of tubular materials require a certain level of strength, hardness, and good roundness. Most of these two types of tubular materials are manufactured using a spiral winding process and then cut into tubular lengths by a cutting assembly.

[0003] The spiral winding processing method and equipment have the following disadvantages:

[0004] First, the forming speed of tubular materials is slow: the spiral winding process uses pre-cut and rewound paper reels, adjusted at an angle according to the required diameter of the paper tube, to wind the tube at an oblique spiral. The winding speed is lower than that of straight forming. At the same time, the paper tube is cut by multiple sets of reciprocating cutters, and the reciprocating time further reduces the processing speed of the paper tube. In addition, spiral paper tube machines generally use wide and thick rolls for feeding, and it is not possible to change the old and new reels online. The machine must be stopped every time the raw materials are changed.

[0005] Secondly, the consumption of raw materials is relatively large: spiral paper tubes are generally made by winding multiple layers of thickened paper, and glue needs to be applied between each two layers of paper strips, resulting in a large amount of glue consumption; at the same time, the spiral winding method means that spiral wound paper tubes require more paper than straight-formed paper tubes for the same length.

[0006] Third, the paper tubes are of poor quality, have a strong odor, and pose a risk to food safety: The thickness of the spiral paper tube winding machine depends on the thickness and number of layers of paper. If the pitch of adjacent layers of paper coils is different, overlapping of the two layers will frequently occur during continuous winding, affecting the roundness of the paper tube. Furthermore, due to the influence of multiple parameters during the winding process and the spiral structure itself, thin-walled paper tubes using spiral winding often have uneven surfaces and poor roundness and hardness. The extensive use of glue during the winding process also causes glue leakage from the edges of the paper strip, resulting in a large amount of residual glue on both the inner and outer surfaces of the paper tube. This inevitably leads to a glue odor. Although the glue used is non-toxic, long-term contact may still have adverse effects on human health, resulting in poor food safety.

[0007] Fourth, the equipment is complex: the spiral paper tube machine needs to cut and rewind wide paper strips, and then perform spiral winding and knife cutting. The structure of each functional component is relatively complex, which also leads to its large footprint. Utility Model Content

[0008] In view of this, the present invention provides a tubular material manufacturing apparatus to solve the problems of slow forming speed, large raw material consumption, and poor quality of existing spiral winding forming methods.

[0009] In a first aspect, embodiments of this disclosure provide a tubular material manufacturing apparatus, comprising:

[0010] A first slitting assembly is used to slit the original strip into at least three strips, wherein at least one of the at least three strips is a wide strip and at least two narrow strips are narrower than the wide strip. The first slitting assembly is also used to output the slitted wide strip along a first plane and output the slitted narrow strip along a second plane that does not coincide with the first plane.

[0011] An adhesive application assembly, located downstream of the first slitting assembly, is used to apply adhesive to one surface of the wide or narrow strip;

[0012] An adhesive assembly, disposed downstream of the gluing assembly, is used to bond each wide strip to at least two adjacent narrow strips in such a way that the narrow strips are on the same plane through the adhesive coating surface to form a double-layer adhesive strip, and there is a gap between the bonded adjacent narrow strips.

[0013] The second cutting component is located downstream of the bonding component and is used to cut the double-layer adhesive strip output by the bonding component along the gap between adjacent narrow strips to obtain at least two double-layer strips.

[0014] N Each forming component is used to coil a double-layer strip into a continuous double-layer tubular structure with its axis parallel to the conveying direction; wherein, N This is equal to the total number of narrow strips cut by the first slicing component. N It is a positive integer greater than 1;

[0015] The bonding assembly includes a bonding bottom roller and a third pressing roller. The roller surfaces of the bonding bottom roller and the third pressing roller are arranged opposite each other, and their axes are parallel to each other and transverse to the conveying direction of the narrow strip. The spacing between the bonding bottom roller and the third pressing roller is set so that when the wide strip and the narrow strip pass through, their strip surfaces come into contact and are bonded together to form a double-layer bonded strip.

[0016] In conjunction with the first aspect, in a first embodiment of the first aspect, the manufacturing apparatus further includes: a first translation component and / or a second translation component;

[0017] The first translation component is disposed downstream of the first slitting component and is used to translate the multiple narrow strips along their width direction so that there is a gap of a predetermined width between adjacent narrow strips and the strip surfaces of adjacent narrow strips are output along the third plane.

[0018] The second translation component is located downstream of the second slitting component and is used to translate each double-layer strip output by the second slitting component along its width direction so that each double-layer strip is translated to the center position of a forming component inlet.

[0019] In conjunction with the first embodiment of the first aspect, in the second embodiment of the first aspect, the first slitting component slits the original strip in the width direction into n The strip group comprises a first strip with a first width, a second strip with a second width, and a third strip with a third width; wherein the second width is greater than the first width and the third width. n It is a positive integer. N =2 n ;

[0020] The first translation component will the first i The first and third strips in the strip group are translated along their width direction and then output; among them, i =1,2,…, n ;

[0021] The adhesive component will... i The gap center lines of the first and third strips output by the first translation component in the group of strips are aligned with the first... i The center line of the width direction of the second strip in the group of strips is aligned in a direction perpendicular to the strip surface. The second strip is then bonded to the adhesive coating surface. i The first, second, and third strips in the group of strips are bonded together as a double-layer adhesive strip with the first and second strips on the same layer, forming a triangular structure.

[0022] In conjunction with the second embodiment of the first aspect, in the third embodiment of the first aspect, the... n =1, the first slitting component sequentially slits the original strip into a first strip, a second strip, and a third strip in the width direction; the first width is equal to the third width, and the second width is equal to the third width. L 2 and first width L 1. Satisfies the following relation: L 2=2 L 1± l ,in, l This is the preset difference;

[0023] The second slitting component slits the double-layer adhesive strip with the triangular structure along the center line of the gap between the first strip and the third strip to obtain a first double-layer strip composed of a fourth strip and a first strip, and a second double-layer strip composed of a fifth strip and a third strip.

[0024] The manufacturing apparatus specifically includes a first molding assembly and a second molding assembly;

[0025] The first forming component curls the first double-layer strip upwards / downwards along its width direction on the left and right sides, so that the front end face of the first double-layer strip is formed into a circle, and the left and right sides of the fourth strip are opposite to each other, and the left and right sides of the first strip are opposite to each other.

[0026] The second forming component curls the second double-layer strip upwards / downwards along its width direction, so that the front end face of the second double-layer strip is formed into a circle, the left and right sides of the fifth strip are opposite each other, and the left and right sides of the third strip are opposite each other.

[0027] In conjunction with the first aspect, in the fourth embodiment of the first aspect, the widths of any two narrow strips are equal or unequal;

[0028] The adhesive component will input adjacent k A narrow strip is bonded to a wide strip, the width of which is greater than or equal to that of the adjacent strip. k The sum of the widths of the narrow strips; among which, k It is a positive integer greater than or equal to 2.

[0029] In conjunction with the first aspect, in the fifth embodiment of the first aspect, the adhesive application assembly includes an adhesive supply component and a nozzle; the adhesive supply component is connected to the nozzle and supplies adhesive to the nozzle; the nozzle outlet has a preset shape so that when the adhesive outlet is used to apply adhesive to the surface of the wide strip, at least one adhesive-free area extending along the length direction of the wide strip is formed on the adhesive application surface of the wide strip.

[0030] The bonding assembly aligns the center line of the gap between adjacent narrow strips with the center line of the glue-free area on the input wide strip in a direction perpendicular to the strip surface, and bonds the narrow strips to the wide strip through the glue coating surface.

[0031] The second slitting component slits the double-layer adhesive strip along the glue-free area.

[0032] In conjunction with the first aspect, in a sixth embodiment of the first aspect, the first slitting assembly includes a first cutting roller and a first conveying roller that rotate about their own axis; the roller surfaces of the first cutting roller and the first conveying roller are arranged opposite each other, and their axes are parallel to each other and transverse to the conveying direction of the original strip; the first cutting roller is provided with a plurality of first rotating circular blades, and the roller surface of the first conveying roller has a first annular cutting groove matching each first rotating circular blade or a first lower blade meshing with each first rotating circular blade in the circumferential direction; and / or

[0033] The second slitting assembly includes a second cutter roller and a second conveyor roller that rotate around their own axis; the roller surfaces of the second cutter roller and the second conveyor roller are arranged opposite each other, and their axes are parallel to each other and transverse to the conveying direction of the original strip; the second cutter roller is provided with a plurality of second rotating circular cutters, and the roller surface of the second conveyor roller has a second annular cutting groove that matches each second rotating circular cutter or a second lower blade that meshes with each second rotating circular cutter in the circumferential direction.

[0034] In conjunction with the second embodiment of the first aspect, in the seventh embodiment of the first aspect, the first translation component includes at least one set of gathering roller components, the gathering roller components including two first guide rollers that are installed at a certain angle and rotate about their own axes, the axes of the two first guide rollers having a shape that is low in the middle and high on both sides in a cross section perpendicular to the input direction of the first strip and the third strip;

[0035] and / or

[0036] The second translation component includes at least one set of separation roller assemblies, each comprising two second guide rollers mounted at a certain angle and rotating about their own axes. The axes of the two second guide rollers are shaped such that the middle is higher than the sides in a cross section perpendicular to the input direction of the two double-layer strips.

[0037] In conjunction with the third embodiment of the first aspect, in the eighth embodiment of the first aspect, the surfaces of the first double-layer strip and the second double-layer strip are conveyed in the same direction and parallel to each other along the centerline of the length direction in the same fourth plane.

[0038] The first forming component and the second forming component are arranged in a mirror image to the left and right in the horizontal direction of the conveying direction of the double-layer strip;

[0039] Alternatively, the first forming component and the second forming component may be arranged in a staggered manner or side by side in the conveying direction of the double-layer strip.

[0040] In conjunction with the first aspect, in the ninth embodiment of the first aspect, the manufacturing apparatus further includes: a strip feeding assembly and / or an auxiliary strip feeding assembly and / or a cutting assembly, and a conveying assembly;

[0041] The strip supply assembly is located upstream of the first slitting assembly and is used to continuously supply the coiled strip to the first slitting assembly after unwinding it into raw strip.

[0042] The auxiliary material supply assembly is used to provide the molding assembly with auxiliary material strips as inner lining and / or outer wrapping material for the double-layer tubular structure; wherein, the molding assembly is also used to introduce the auxiliary material strips and form the auxiliary material strips into an inner lining inside the double-layer tubular structure and / or wrap the double-layer tubular structure in a pre-set shape or structure.

[0043] The cutting component is located downstream of the forming component and is used to cut the continuous double-layer tubular material output by the forming component into tubular rods of a specified length.

[0044] The conveying component is located downstream of the cutting component and is used to arrange and output the tubular rods output by the cutting component in an orderly manner.

[0045] The tubular material manufacturing apparatus provided by this utility model involves cutting the original strip into at least one wide strip and at least two narrow strips, applying adhesive to the wide strip, bonding multiple narrow strips together with one wide strip to obtain a double-layer adhesive strip, then cutting the double-layer adhesive strip into multiple double-layer strips along the gaps between adjacent narrow strips, and finally directly longitudinally forming each double-layer strip into a double-layer tubular object. On the one hand, this apparatus avoids the uneven surface problem of the tubular object caused by the spiral winding free forming process, and the one-time forming of the tubular object also results in a high degree of roundness, effectively improving the appearance and roundness quality of the tubular object. On the other hand, the produced double-layer tubular object only requires adhesive to be applied to one strip, which reduces the amount of adhesive used compared to the spiral winding method where adhesive needs to be applied between every two layers of strip, improving food safety while reducing the odor caused by adhesive. On the other hand, by bonding multiple narrow strips from the same raw material onto a wide strip and then cutting them into multiple double-layer strips, it is possible to ensure that the two layers of material used to produce double-layer tubular objects are completely identical at the same time. This facilitates control over the adhesives and processing techniques used, reduces product variation, and improves product quality. In addition, multiple double-layer strips of the same material are formed simultaneously in parallel through multiple forming components on a conveyor line. Compared to the technology where a single production line can only produce one paper tube, this can multiply production efficiency, greatly increase production speed, achieve continuous industrial production, and reduce production costs. Attached Figure Description

[0046] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0047] Figure 1 This is a schematic diagram of the structure of a tubular object manufacturing device according to a first embodiment of the present invention;

[0048] Figure 2 This is a schematic diagram of a second embodiment of the tubular object manufacturing device of this utility model;

[0049] Figure 3This is a schematic diagram of the structure of the first slitting component provided by this utility model;

[0050] Figure 4 This is a schematic diagram of the structure of the double-layer adhesive paper tape with a triangular structure output by the adhesive component of this utility model;

[0051] Figure 5 This is a schematic diagram of the structure of a third embodiment of the tubular object manufacturing device of this utility model;

[0052] Figure 6 This is a schematic diagram of the gluing assembly of this utility model applying glue to the second strip;

[0053] Figure 7 This is a schematic diagram of the structure of the first translation component of this utility model;

[0054] Figure 8 This is a schematic diagram of the adhesive component of this utility model;

[0055] Figure 9 This is a schematic diagram of the structure of the second cutting component and the second translation component of this utility model;

[0056] Figure 10 This is a schematic cross-sectional view of the first molding component of this utility model;

[0057] Figure label:

[0058] 1. Strip supply assembly; 2. First slitting assembly; 3. Gluing assembly; 4. First translation assembly; 5. Bonding assembly; 6. Second slitting assembly; 7. Second translation assembly; 8. Tension control assembly; 9. First forming assembly; 10. Second forming assembly; 11. Cutting assembly; 12. Conveying assembly; 13. First auxiliary material strip supply assembly; 14. Second auxiliary material strip supply assembly;

[0059] 101. Coiled strip; 102. Strip splicing device; 121. Adhesive layer

[0060] 201. First paper tape limiter; 202. First pressure roller; 203. First conveying roller; 204. First knife roller; 205. First rotating circular knife; 206. Second paper tape limiter; 302. Plate-type slit nozzle;

[0061] 401. Third paper tape limiter; 402. Converging roller assembly; 403. Fourth paper tape limiter;

[0062] 501. Third pressing roller; 502. Adhesive bottom roller; 503. Strip guide;

[0063] 601. Second pressing roller; 602. Second conveying roller; 603. Second cutting roller; 604. Second rotating circular cutter;

[0064] 701. Separating roller assembly;

[0065] 901. Base; 903. First side molding block; 904. Second side molding block; 905. Core rod;

[0066] P, raw strip; P11, first strip; P12, second strip; P13, third strip; P2, double-layer adhesive strip; P21, first double-layer strip; P22, second double-layer strip; G1, first double-layer tubular structure; G2, second double-layer tubular structure;

[0067] A. The center line of the gap between the first strip P12 and the third strip P13; B. The center line of the width direction of the second strip P12; a The widths of the first strip P11 and the third strip P13; b The width of the second band, P12; c The width of the double-layer adhesive strip P2; d Widths of the first double-layer strip P21 and the second double-layer strip P22; J1~J2, adhesive areas; W, non-adhesive areas. Detailed Implementation

[0068] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0069] Figure 1 This is a schematic diagram of the structure of a tubular object manufacturing apparatus provided in an embodiment of this utility model, as shown below. Figure 1 As shown, the manufacturing apparatus includes: a first slitting assembly 2, an adhesive application assembly 3, an bonding assembly 5, a second slitting assembly 6, and [other components] arranged along the production process flow direction. N One molded component; wherein:

[0070] The first slitting component 2 is used to slit the original strip into at least three strips, of which at least one is a wide strip and at least two are narrow strips that are narrower than the wide strip. The first slitting component 2 is also used to output the slitted wide strip along a first plane and output the slitted narrow strip along a second plane that does not coincide with the first plane.

[0071] The gluing assembly 3, located downstream of the first slitting assembly 2, is used to apply glue to one surface of a wide or narrow strip.

[0072] The bonding component 5, located downstream of the adhesive application component 3, is used to bond each wide strip to at least two adjacent narrow strips in a manner where the narrow strips are on the same plane, through the adhesive coating surface to form a double-layer adhesive strip, with gaps between the bonded adjacent narrow strips. For example, the bonding component 5 can bond two narrow strips to one wide strip to obtain a triangular-shaped double-layer adhesive strip. Alternatively, when the original strip width is sufficiently wide, the first slitting component can also cut out more narrow strips, bonding three or four or more narrow strips to one wide strip. Or, when the original strip width is sufficiently wide, the first slitting component can also cut out k wide strips and 2k narrow strips, with each narrow strip-wide strip-narrow strip forming a combination. The 2k narrow strips can be bonded to the k wide strips according to the above combination method, which will not be elaborated further here. When bonding multiple narrow strips and wide strips, the narrow strips do not overlap and have gaps between each pair.

[0073] The second slitting component 6 is located downstream of the bonding component 5 and is used to slit the double-layer adhesive strip output by the bonding component 5 along the gap between adjacent narrow strips to obtain at least two double-layer strips.

[0074] Each forming assembly is used to coil a double-layer strip into a continuous double-layer tubular structure with its axis parallel to the conveying direction; wherein, N This is equal to the total number of narrow strips cut by the first slitting component 2. N It is a positive integer greater than 1.

[0075] The tubular material manufacturing apparatus provided in this embodiment of the invention uses a first slitting component 2 to slit the original strip material into at least one wide strip and at least two narrow strips. Then, an adhesive application component 3 applies adhesive to the wide strip, and an bonding component 5 bonds multiple narrow strips together with one wide strip to obtain a double-layer adhesive strip. A second slitting component 6 cuts the double-layer adhesive strip into multiple double-layer strips along the gaps between adjacent narrow strips. Finally, a forming component directly forms each double-layer strip longitudinally into a double-layer tubular object. On one hand, this apparatus avoids the uneven surface of the tubular object caused by the spiral winding free forming process. Simultaneously, the one-time forming of the tubular object by the forming component also results in a high degree of roundness, effectively improving the appearance and roundness quality of the tubular object. On the other hand, the produced double-layer tubular object only has adhesive applied to one strip, which reduces the amount of adhesive used compared to the spiral winding method where adhesive is applied between every two layers of strip material. This improves food safety while reducing the odor caused by the adhesive.

[0076] On the other hand, because the bonding of materials with different properties places high demands on the properties of the adhesive (viscosity, moisture content, etc.) and the processing technology (such as the conveying speed of the tape during bonding, the control of the adhesive temperature, etc.), it is difficult to ensure that the paper used for different layers of paper tubes is completely consistent at the same time in the existing technology. Therefore, it is difficult to control the adhesive used and the processing technology, and the product variation rate is also large. The present invention, by bonding multiple narrow strips from the same original tape to a wide strip and then cutting them into multiple double-layer strips, can ensure that the two layers of materials used for producing double-layer tubular objects are completely consistent at the same time. This facilitates the control of the adhesive used and the processing technology, reduces the product variation rate, and improves product quality. In addition, after secondary cutting, multiple double-layer strips of the same material are formed simultaneously in parallel on the conveyor line through multiple forming components. Compared with the technology that a single production line can only produce one paper tube, it can increase production efficiency many times over.

[0077] In some alternative embodiments, to more precisely control the lateral dimension (width) of the double-layer adhesive strip output by the adhesive assembly and the diameter of the final produced double-layer tubular structure, such as... Figure 2 As shown, the tubular material manufacturing apparatus provided by this utility model further includes: a first translation component 4, which is disposed downstream of the first slitting component 2, for translating multiple narrow strips along their width direction, so that there is a predetermined width gap between adjacent narrow strips and the strip surfaces of adjacent narrow strips are output along a third plane. In some embodiments, the first translation component 4 adjusts the predetermined width of the gap between adjacent narrow strips to 2mm to 8mm, preferably 4 to 6mm.

[0078] Meanwhile, in order to ensure that the double-layer strip output from the second slitting component 6 can smoothly enter the forming component for forming, such as Figure 2 As shown, the tubular material manufacturing apparatus provided by this utility model further includes: a second translation component 7, which is disposed downstream of the second slitting component 6 and upstream of the forming component. The second translation component 7 is used to translate each double-layer strip output from the second slitting component 6 along its width direction, so that each double-layer strip is translated to the center position of the inlet of a forming component. For example, the second translation component 7 can translate multiple input double-layer strips along their width direction, thereby outputting multiple double-layer strips in a staggered manner to connect with the inlets of multiple forming components that are staggered in the width direction.

[0079] In some alternative embodiments, the widths of any two narrow strips obtained by the first slitting component 2 are equal or unequal, thereby meeting the production needs of producing double-layer tubular materials of the same or different diameters at the same time.

[0080] In some alternative embodiments, the adhesive component 5 will bond the adjacent inputs. kA narrow strip is attached to a wide strip, the width of which is greater than or equal to that of the adjacent strip. k The sum of the widths of the narrow strips; among which, k It is a positive integer greater than or equal to 2.

[0081] In the preferred embodiment of this invention, the first slitting component 2 slits the original strip into sections along its width. n The strips are grouped, each group of strips including a first strip with a first width, a second strip with a second width, and a third strip with a third width; wherein, the second width is greater than the first width and the third width; wherein, n It is a positive integer. N =2 n In these embodiments, the first translation component 4 will... i The center lines of the first and third strips in the group are horizontally shifted before output; among them, i =1,2,…, n ; Adhesive component 5 will be the first i The center lines of the gap between the first and third strips output by the first translation component 4 in the group of strips are related to the first strip. i The center line of the width direction of the second strip in the group of strips is aligned in a direction perpendicular to the strip surface. The second strip is then bonded to the adhesive coating surface. i The first, second, and third strips in the group of strips are bonded together in a double-layer adhesive strip with a triangular structure. In this type of double-layer adhesive strip with a triangular structure, the first and second strips are in the same layer.

[0082] Preferably, such as Figure 3 As shown, the first slitting component 2 slits the original strip P into three strips along its width direction, which are respectively strips with a first width. L 1= a The first strip P11 has a second width L 2= b The second strip P12 has a third width L 3= a The third band, P13. The first width... L 1 equals the third width L 3, Second width L 2 and first width L 1. Satisfies the following relation: L 2=2 L 1± l ,in, l This is a preset difference. Preferably, the second width is 2.01 to 2.3 times the first width. For example... Figure 4The bonding component 5 aligns the gap center line A of the first strip P11 and the third strip P13 with the width direction center line B of the second strip P12 in a direction perpendicular to the strip surface of the second strip P12. Then, it contacts the side of the aligned second strip P12 coated with adhesive layer 121 with the opposing strip surfaces of the first strip P11 and the third strip P13, thereby bonding the first strip P11, the second strip P12, and the third strip P13 together through the adhesive-coated surfaces. Figure 4 The double-layer adhesive strip with a triangular structure shown in the figure.

[0083] In this embodiment of the invention, the number of wide and narrow strips that the first slitting component 2 can cut and their combination in the bonding component 5 can be predetermined based on the width of the original strip and the diameter of the double-layer tubular object to be produced. The various combinations of wide and narrow strips will not be elaborated here. Once the combination of wide and narrow strips is determined in the initial design, the number of blades in the first slitting component 2 and the second slitting component 6, the number of forming components, and the specific structures of the first translation component 4 and the second translation component 7 can be determined.

[0084] In some embodiments, when the first slitting component 2 has the function of slitting the original strip P into strips having a first width L The first strip of 1 has a second width L 2. The second strip and having the first width L In the third strip structure of 1, the second slitting component 6 cuts the double-layer adhesive strip with a triangular structure formed by bonding the first, second, and third strips along the center line of the gap between the first and third strips. The second strip is cut into a fourth and a fifth strip, resulting in a first double-layer strip composed of the fourth and first strips and a second double-layer strip composed of the fifth and third strips. In this embodiment, the manufacturing device of this utility model specifically includes a first forming component and a second forming component; wherein, the first forming component curls the left and right sides of the first double-layer strip upward / downward along its conveying direction, so that the front end face of the first double-layer strip is formed into a circle, the left and right sides of the fourth strip are opposite to each other, and the left and right sides of the first strip are opposite to each other; the second forming component curls the left and right sides of the second double-layer strip upward / downward along its conveying direction, so that the front end face of the second double-layer strip is formed into a circle, the left and right sides of the fifth strip are opposite to each other, and the left and right sides of the third strip are opposite to each other. Preferably, during the curling process, the left and right sides of each strip are opposite each other but have a certain gap (e.g., 0~1mm) to accommodate the glue squeezed out between the two layers of the double strip during curling. This prevents the glue from overflowing to the outside and allows the glue in the gap to bond the left and right sides of the strip, preventing edge curling.

[0085] To facilitate understanding of this utility model, the following describes the tubular material manufacturing apparatus provided in the embodiment of this utility model in detail with reference to the example of the first slitting component 2 slitting the original strip into a first strip with a first width, a second strip with a second width, and a third strip with a third width in the width direction.

[0086] Figure 5 This is a schematic diagram of a third embodiment of the tubular object manufacturing device of this utility model, as shown below. Figure 5 As shown, the original strip P is cut by the first slitting assembly 2 into strips with a first width. L 1= a The first strip P11 has a second width L 2= b The second strip P12 and having the first width L After the third strip P13 of strip 1, strips P11 and P13 are conveyed to the right along the horizontal second plane. After being moved and gathered by the first translation component 4 along its width direction, they are finally output vertically upwards. Meanwhile, strip P12 is output vertically upwards by the first cutting component 2, and after being glued to its lower surface by the gluing component 3, it is output to the right. Subsequently, the bonding component 5 bonds strips P11 and P13 to the lower surface of strip P12, forming a... Figure 4 The double-layer adhesive strip P2, with its triangular structure, is output diagonally downwards to the right. The second slitting component 6 equally divides the double-layer adhesive strip P2 into a first double-layer strip P21 and a second double-layer strip P22. The second translation component 7 separates the first double-layer strip P21 and the second double-layer strip P22 along their width direction via a steering roller and a separating component. After being turned by the steering roller group, they enter the tension control component 8 to maintain tension balance and prevent the paper strip from breaking due to excessive tension. If the force is too small and the flow is too loose, then the first double-layer strip P21 and the second double-layer strip P2 are output horizontally to the left. The first double-layer strip P21 first reaches the inlet center position of the first forming component 9, and the second double-layer strip P22 reaches the inlet center position of the second forming component 10 downstream. The first double-layer strip P21 and the second double-layer strip P22 respectively form tubular objects in the first forming component 9 and the second forming component 10, forming the "infinitely long" first double-layer tubular object G1 and the second double-layer tubular object G2 output.

[0087] In some alternative embodiments, such as Figure 5 As shown in the figure, the tubular material manufacturing apparatus provided in this embodiment of the present invention further includes: a strip supply component 1, which is disposed upstream of the first slitting component 2, for continuously supplying the coiled strip 101 to the first slitting component 2 after unwinding it into an original strip P. Figure 5As shown, the strip supply assembly 1 has a rotatable circulation disc and a strip splicing device 102. The circulation disc is equipped with two rolls of strip, one new and one old, and several guide rollers. The old roll of strip in use is guided by the guide rollers and passes through the strip splicing device 102 and then through multiple guide rollers into the first slitting assembly 2. The beginning end of the new roll of strip is guided into the strip splicing device 102. The strip splicing device 102 is used to automatically splice the beginning end of the new strip to the end end of the old strip when the old roll of strip is about to be used up.

[0088] In some embodiments, the first slitting assembly 2 provided by this utility model includes a first cutter roller and a first conveying roller that rotate about their own axis; the roller surfaces of the first cutter roller and the first conveying roller are arranged opposite each other, and their axes are parallel to each other and transverse to the conveying direction of the original strip; the first cutter roller includes ( N + M -1) The first rotating circular cutter and the first conveying roller have a first annular cutting groove matching each first rotating circular cutter or a first blade meshing with each first rotating circular cutter in the circumferential direction of the roller surface; wherein... M It equals the total number of wide strips cut by the first slitting component 2. N This is equal to the total number of narrow strips cut by the first slicing component. N, M It is a positive integer.

[0089] In this embodiment of the utility model, such as Figure 3 and Figure 5 As shown, the first slitting assembly 2 includes a first paper tape limiter 201, a first pressure roller 202, a first conveying roller 203, a first cutting roller 204, and a second paper tape limiter 206. Two first rotating circular blades 205 are mounted on the first cutting roller 204. In this embodiment, after passing through the first paper tape limiter 201, the original paper tape P remains in a horizontal (width direction) position as it passes between the first conveying roller 203 and the first cutting roller 204. The first pressure roller 202 presses the original paper tape P firmly against the first conveying roller 203. After forming a certain wrap angle with the first conveying roller 203, the original paper tape P is slid along the longitudinal direction of the original paper tape P by the two first rotating circular blades 205 on the first cutting roller 204 into sections with a first width. a The first strip P11 has a second width b The second strip P12 and having the first width a The third strip, P13, is used to cut the original strip P.

[0090] In some embodiments, the first pressing roller 202 can be driven by a motor or a cylinder, or even manually locked, depending on the actual equipment space limitations.

[0091] In some embodiments, the first pressing roller 202 in the first slitting assembly 2 may further include a first pressing roller rotating shaft (not shown), a first pressing roller surface, a first pressing roller connecting device, and a first locking assembly. The position of the first pressing roller is adjusted manually or automatically and locked or unlocked to press the original strip P tightly onto the first conveying roller 203.

[0092] In some embodiments, the first conveying roller 203 may further include a first conveying roller power assembly, a first conveying roller rotating shaft, and a first conveying roller connecting device (not shown in the figure). The first conveying roller 203 is connected to the first conveying roller power assembly through the first conveying roller rotating shaft and the first conveying roller connecting device. The first conveying roller power assembly synchronously tracks the production speed of the equipment and adaptively drives the first conveying roller rotating shaft to rotate, cooperating with the first pressing roller 202 to realize the traction and conveying of the original strip P.

[0093] In some embodiments, the first cutter roller 204 may further include a first cutter roller power assembly (not shown), a first circular cutter rotating shaft, a first cutter roller eccentric bearing seat, and a first cutter roller connecting device. A first rotating circular cutter 205 is mounted on the first circular cutter rotating shaft and fixed to the first cutter roller 204 via the first cutter roller connecting device. The first circular cutter rotating shaft is connected to the first cutter roller power assembly. The first cutter roller power assembly drives two first rotating circular cutters 205 to rotate rapidly. The first cutter roller eccentric bearing seat rotates manually or via a motor / cylinder, causing the first circular cutter rotating shaft mounted within the first cutter roller eccentric bearing seat to move eccentrically. This controls the first rotating circular cutter 205 to enter or leave the cutter groove of the first conveyor roller 203 during the rotation of the first circular cutter rotating shaft. The first rotating circular cutter 205 cuts the original strip P into three strips. The first strip P11 and the third strip P13 are limited in lateral (width direction) position by the second paper tape limiter 206 to prevent strip deviation, achieving precise one-time cutting of the original strip P. Alternatively, if the first conveying roller 203 is equipped with a first lower blade that can rotate without power, then after the first cutter roller 204 is in contact with the first conveying roller 203, the two first rotating circular cutters 205 on the first cutter roller 204 mesh with the two first lower blades on the first conveying roller 203 to form a shearing pattern similar to scissors, thereby completing the cutting of the original strip material P.

[0094] In some optional embodiments, the adhesive application assembly 3 includes an adhesive supply component and a nozzle; the adhesive supply component is connected to the nozzle and supplies adhesive to the nozzle. When the material to be adhesiveed is a narrow strip, the nozzle applies adhesive to the entire surface of one side of the narrow strip to form an adhesive coating surface; or, when the material to be adhesiveed is a wide strip, the nozzle applies adhesive to the entire surface of one side of the wide strip to form an adhesive coating surface; or, when the material to be adhesiveed is a wide strip, the nozzle's outlet has a preset shape so that when the outlet applies adhesive to the surface of the wide strip, at least one adhesive-free region extending along the length of the wide strip is formed on the adhesive coating surface of the wide strip (the number of adhesive-free regions can be equal to the number of narrow strips that the wide strip needs to be bonded to minus 1). For example... Figure 6 As shown, the nozzle of the gluing assembly 3 is a plate-type slit nozzle 302. After the plate-type slit nozzle 302 applies glue to the second strip P12, glued areas J1 and J2 and a non-glue area W extending along the length direction of the second strip P12 are formed on the glue-coated surface of the second strip P12, and the non-glue area W is located in the middle of the glued areas J1 and J2. In this way, the bonding assembly 5 aligns the center line of the gap between the adjacent narrow strips with the center line of the non-glue area on the input wide strip in a direction perpendicular to the strip surface of the wide strip, and bonds the first strip P11 and the third strip P13 to the wide strip through the glue-coated surface. The second slitting assembly 6 then cuts the double-layer bonding strips along the non-glue area.

[0095] Preferably, the width of the glue-free area is 0.5mm to 1.0mm.

[0096] According to an embodiment of this utility model, a plate-type slit nozzle can be mounted on a glue-applying roller. Glue enters the glue-applying roller through a glue-supplying component and finally flows out through the slit nozzle. When glue application is required, the glue-applying roller is rotated so that the glue outlet of the slit nozzle is positioned close to the surface of the second belt P12. This completes the quantitative application of glue during the conveying process of the second belt P12. When glue application needs to be stopped, the glue-applying roller is rotated so that the glue outlet of the slit nozzle is positioned away from the second belt P12. In some embodiments, the glue-applying roller may not be cylindrical but irregularly shaped. The nozzle may be an atomizing nozzle or other types of nozzle instead of a slit nozzle. When using an atomizing nozzle, the second belt P12 may not need to contact the nozzle. The specific configuration depends on production needs and will not be elaborated here.

[0097] In some alternative embodiments, such as Figure 7As shown, the first translation component 4 includes at least one set of gathering roller components 402. Each gathering roller component 402 includes two first guide rollers mounted at a certain angle and rotating around their own axes. The axes of the two first guide rollers have a shape that is lower in the middle and higher on both sides in a cross-section perpendicular to the input direction of the first belt P11 and the third belt P13. After the first belt P11 and the third belt P13 pass through the two guide rollers on the gathering roller component 402, because the axes of the two first guide rollers are not parallel to the conveyed belt, the internal tension of the belt changes under their action, causing the first belt P11 and the third belt P13 to translate and converge in their width direction. Preferably, when the input first belt P11 and the third belt P13 are widely spaced in their width direction and require a large translation and convergence distance, multiple sets of gathering components 402 can be arranged in the belt conveying direction to converge the first belt P11 and the third belt P13 in stages, reducing the deformation during each convergence.

[0098] Preferably, the first translation component 4 further includes a third paper tape limiter 401 and a fourth paper tape limiter 403. The third paper tape limiter 401 is used to limit the lateral position of the input first strip P11 and the third strip P13 to ensure that the first strip P11 and the third strip P13 are smoothly conveyed to the two first guide rollers of the gathering roller component 402. After the first strip P11 and the third strip P13 are translated to the designated position by the gathering roller component 402, the first strip P11 and the third strip P13 are output with their lateral positions fixed after passing through the fourth paper tape limiter 403, so as to accurately connect with the narrow strip inlet position of the bonding component 5.

[0099] In some embodiments, the gathering roller assembly 402 may also... Figure 7 The two guide rollers arranged on the left and right sides are replaced with a guide assembly that includes a concave wheel assembly and a convex wheel assembly, as described in Chinese Patent CN 202210957396.3, which will not be repeated here.

[0100] Figure 8 This is a schematic diagram of the adhesive component of this utility model, as shown below. Figure 8 As shown, the bonding assembly 5 includes a third pressure roller 501, a bonding bottom roller 502, a fifth paper tape limiter, and a sixth paper tape limiter; wherein, the roller surfaces of the third pressure roller 501 and the bonding bottom roller 502 are arranged opposite each other, and their axes are parallel to each other and transverse to the conveying direction of the narrow strips (first strip P11 and third strip P13) (along the width direction of the narrow strips); the spacing between the bonding bottom roller and the third pressure roller is such that when the wide strip and the narrow strip pass through, the strip surfaces of the wide strip and the narrow strip contact each other and are bonded into a double-layer bonded strip. For example Figure 8As shown, the first strip P11 and the third strip P13 are conveyed close to the bonding roller 502. The wide strip (the second strip P12) is located between the third pressure roller and the narrow strip, with the adhesive-coated surface of the wide strip facing the narrow strip. The second strip P12 is located directly above the first strip P11 and the third strip P13. The spacing between the bonding roller 502 and the third pressure roller 501 is such that when the first strip P11, the second strip P12, and the third strip P13 pass through, the adhesive-coated surface of the second strip P12 contacts the first strip P11 and the third strip P13. The pressure roller 501 presses the three strips together, completing the double-layer strip bonding, forming a... Figure 4 The width shown is c The double-layer adhesive strip P2 has a triangular structure. The fifth and sixth paper tape limiters are located upstream and downstream of the adhesive bottom roller, respectively, along the conveying direction of the narrow strip. The fifth paper tape limiter is used to limit the input narrow strip in its width direction to limit the position of the input narrow strip relative to the input wide strip, preventing the relative position of the three strips from changing during bonding. The sixth paper tape limiter is used to limit the output double-layer adhesive strip P2 to ensure that the double-layer adhesive strip P2 is aligned with the input second slitting assembly 6.

[0101] Preferably, such as Figure 5 As shown, since the conveying path of the double-layer adhesive strip P2 obtained by the adhesive assembly 5 is relatively long, in order to prevent the strip from running off-track during the conveying process, the adhesive assembly 5 also includes a paper tape guide 503, which is located downstream of the third pressure roller 501 and the adhesive bottom roller 502. The paper tape guide 503 is used to limit the position of the double-layer adhesive strip P2 to prevent the double-layer adhesive strip P2 from running off-track, so as to ensure that the output double-layer adhesive strip P2 can accurately enter the downstream second slitting assembly 6.

[0102] In some optional embodiments, if the adhesive used in the gluing component 3 is PVA, the bonding component 5 further includes a heating device (not shown in the figure) disposed inside the third pressing roller 501 and / or the bonding roller 502. By heating the roller surfaces of the third pressing roller 501 and / or the bonding roller 502, the adhesive can be rapidly solidified and bonded, preventing displacement of the bonding surface of the double-layer bonded strip P2 during transport. If the adhesive used in the gluing component 3 is hot melt adhesive, the interior of the third pressing roller 501 and / or the bonding roller 502 may also be provided with a cooling channel. The bonding component 5 further includes a cooling component communicating with the cooling channel. Cooling liquid is circulated into the interior of the third pressing roller 501 and / or the bonding roller 502 through the cooling component to cool the roller surfaces of the third pressing roller 501 and / or the bonding roller 502, thereby cooling the bonding surface, achieving rapid solidification of the adhesive, improving the bonding force, and preventing displacement of the bonding surface of the double-layer bonded strip P2 during transport.

[0103] Figure 9This is a structural schematic diagram of the second cutting component and the second translation component of this utility model, as shown below. Figure 9 As shown, the second slitting assembly 6 includes a second cutter roller 603 and a second conveying roller 602 that rotate about their own axis. Figure 5 As shown, similar to Figure 3 The first conveying roller 203); wherein, the roller surfaces of the second cutter roller 603 and the second conveying roller 602 are arranged opposite each other, and their axes are parallel to each other and transverse to the conveying direction of the original strip; the second cutter roller includes a plurality of second rotating circular cutters 604, and the roller surface of the second conveying roller 602 has a second annular cutting groove matching each second rotating circular cutter 604 or a second lower blade meshing with each second rotating circular cutter in the circumferential direction. For example, when the first slitting assembly 2 cuts a total of wide strips in one go, M The total number of narrow strips is N If the second slitting component 6 simultaneously slits multiple double-layer strips output from the bonding component, then the second cutter roller includes ( N - M The second rotating circular blade 604 can cut the material in one go. M Root double-layer strip obtained N A narrow strip. Clearly, when the second slitting component is used... Figure 5 In the device shown (i.e. when) N =2, M When =1), such as Figure 9 As shown, the second cutter roller 603 includes a second rotating circular cutter 604, used to cut the input width of... c The double-layer adhesive strip P2 is longitudinally cut into strips with a width of d The first double-layer strip P21 and the second double-layer strip P22 are used to achieve equal division of the double-layer adhesive strip P2 with a triangular structure.

[0104] Preferably, similar to the first cutting component 2, such as Figure 5 As shown, the second slitting assembly 6 may further include a second pressing roller 601. By locking the second pressing roller 601, the double-layer adhesive strip P2 is pressed and pressed tightly against the second conveying roller 602. After the double-layer adhesive strip P2 forms a certain wrap angle with the second conveying roller 602, it is cut along the length direction of the double-layer adhesive strip P2 by the second rotating circular blade 604 on the second cutting roller 603. The second pressing roller 601 can be driven by a motor or a cylinder, depending on the actual equipment space limitations.

[0105] Similar to the first slitting assembly 2, the second pressing roller 601 in the second slitting assembly 6 may also include a second pressing roller rotating shaft (not shown), a second pressing roller surface, a second pressing roller connecting device, and a second locking assembly. The position of the second pressing roller 601 can be adjusted manually or automatically and locked or unlocked to press the double-layer adhesive strip P2 tightly onto the second conveying roller 602.

[0106] Similar to the first slitting component 2, the second conveying roller 602 may also include a second conveying roller power component, a second conveying roller rotating shaft, and a second conveying roller connecting device (not shown in the figure). The second conveying roller is connected to the second conveying roller power component through the second conveying roller rotating shaft and the second conveying roller connecting device. The second conveying roller power component synchronously tracks the production speed of the equipment and adaptively drives the second conveying roller rotating shaft to rotate, cooperating with the second pressing roller 601 to realize the traction and conveying of the double-layer adhesive strip P2.

[0107] Similar to the first slitting assembly 2, the second cutter roller 603 may also include a second cutter roller power assembly (not shown), a second circular cutter rotating shaft, a second cutter roller eccentric bearing seat, and a second cutter roller connecting device. The second rotating circular cutter 604 is mounted on the second circular cutter rotating shaft and fixed to the second cutter roller 603 via the second cutter roller connecting device. The second circular cutter rotating shaft is connected to the second cutter roller power assembly. The second rotating circular cutter 604 is driven to rotate rapidly by the second cutter roller power assembly. The second cutter roller eccentric bearing seat rotates manually or by a motor / cylinder, causing the second circular cutter rotating shaft mounted in the second cutter roller eccentric bearing seat to move eccentrically. This controls the second rotating circular cutter 604 to enter or leave the cutter groove of the second conveying roller 602 during the rotation of the second circular cutter rotating shaft. The second rotating circular cutter 604 cuts the double-layer adhesive strip P2 into two strips. The second slitting assembly 6 may also include a seventh paper tape limiter and an eighth paper tape limiter respectively disposed on the tape inlet side and outlet side of the second cutter roller 603, which are used to laterally (in the width direction of the tape) limit the input double-layer adhesive tape P2 and the output first double-layer tape P21 and second double-layer tape P22.

[0108] In some embodiments, such as Figure 9 As shown, the second translation assembly 7 includes at least one set of separating roller assemblies 701. Each separating roller assembly 701 includes two second guide rollers mounted at a certain angle and rotating about their own axes. The axes of the two second guide rollers have a shape that is higher in the middle and lower on both sides in a cross-section perpendicular to the input direction of the two double-layer strips. After the first double-layer strip P21 and the second double-layer strip P22 pass through the two second guide rollers on the separating roller assembly 701, due to changes in the internal tension of the paper strips, the first double-layer strip P21 and the second double-layer strip P22 will be translated and separated in their width direction. After passing through... Figure 5After being guided by some of the guide rollers shown, the first double-layer strip P21 reaches the center position of the inlet of the first forming component 9, and the second double-layer strip P22 reaches the center position of the inlet of the second forming component 10, completing the lateral translation of the center line of the double-layer paper strip.

[0109] In this embodiment of the invention, the second translation component 7 outputs the surfaces of the first and second double-layer strips in the same parallel direction along the centerline of the double-layer strip length in the same fourth plane. After the tension control component 8 adjusts the paper tape tension and other steering rollers, the surfaces of the first and second double-layer strips are finally input into the first forming component 9 and the second forming component 10 in the same parallel direction along the centerline of the double-layer strip length in the same plane. In this embodiment, the first forming component 9 and the second forming component 10 can be arranged horizontally and laterally mirror each other in the conveying direction of the first and second double-layer strips; or, the first forming component 9 and the second forming component 10 can be arranged staggered front and back in the conveying direction of the first and second double-layer strips, that is: the inlet centerline of the first forming component 9 coincides with the length centerline of the first double-layer strip, and the second forming component 10 does not obstruct the conveying of the first double-layer strip / first double-layer tubular object; the inlet centerline of the second forming component 10 coincides with the length centerline of the second double-layer strip, and the first forming component 9 does not obstruct the conveying of the second double-layer strip / second double-layer tubular object. For example Figure 5 The first forming component 9 and the second forming component 10 shown are sequentially arranged on the conveying path of the double-layer strip downstream of the tension control component 8. They are located upstream and downstream of each other in the conveying direction of the double-layer strip, thus providing space for the first forming component 9 and the second forming component 10 to be installed separately. Figure 5 In the top view of the device shown, assuming the first double-layer strip P21 is located to the right of the second double-layer strip P22, the first forming component 9 can also be positioned to the right of the output end of the tension control component 8, and the second forming component 10 can be positioned to the left of the output end of the tension control component 8. This allows the first forming component 9 to form the first double-layer strip P21 on the right into a first double-layer tubular object G1, and the second forming component 10 to form the second double-layer strip P22 on the left into a second double-layer tubular object G2. Clearly, when there are multiple forming components, the inlet centers of the multiple forming components can be staggered without interference in the strip conveying direction and in the horizontal direction transverse to the strip conveying direction, according to the workshop space and layout requirements. After the second translation component 7 separates the multiple double-layer strips, various steering rollers can be used to feed the multiple double-layer strips into the respective forming components. Further details are omitted here.

[0110] Figure 10 This is a schematic cross-sectional view of the first molding component of this utility model, as shown below. Figure 10As shown, the first forming component 9 may include a base 901, a first side forming block 903, a second side forming block 904, and a mandrel 905. The first double-layer paper tape P21 is rolled into a tubular shape by the working curved surfaces of the base 901, the first side forming block 903, and the second side forming block 904. During the forming process, the inner side of the tubular shape is supported by the mandrel 905 to prevent the first double-layer paper tape P21 from collapsing inward during the forming process. Finally, the paper tube is shaped by the adhesive cured by the sealing component (not shown in the figure), thus realizing the forming of the double-layer tubular object G1.

[0111] In some preferred embodiments, the first molding component 9 and the second molding component 10 also have heating or cooling functions to heat / cool the sealing edge of the molded double-layer tubular material to achieve rapid curing of the sealing adhesive.

[0112] In some embodiments, the tubular manufacturing apparatus of this invention may further include: an auxiliary material strip supply assembly for providing an auxiliary material strip as a tubular inner lining and / or outer wrapping material to a forming assembly; wherein the forming assembly is further configured to introduce the auxiliary material strip and form an inner lining and / or wrapping the auxiliary material strip on the outside of the double-layer tubular material in a pre-set shape or structure. For example Figure 5 As shown, the first auxiliary material supply assembly 13 provides auxiliary material to the first molding assembly 9, and the second auxiliary material supply assembly 14 provides auxiliary material to the second molding assembly 10.

[0113] In some embodiments, such as Figure 5 As shown, the tubular material manufacturing apparatus of this utility model may further include:

[0114] The cutting component 11 is located downstream of the forming component and is used to cut the continuous double-layer tubular materials G1 and G2 output by the forming component into tubular rods of a specified length.

[0115] The conveying component 12, which is located downstream of the cutting component 11, is used to arrange the tubular rods output by the cutting component in an orderly manner.

[0116] The tubular material manufacturing apparatus provided in this embodiment of the invention cuts the original strip into at least one wide strip and at least two narrow strips, applies adhesive to the wide strip, and bonds multiple narrow strips together with one wide strip to obtain a double-layer adhesive strip. Then, along the gaps between adjacent narrow strips, the double-layer adhesive strip is cut into multiple double-layer strips, and finally, each double-layer strip is directly longitudinally formed into a double-layer tubular object. On the one hand, this apparatus avoids the uneven surface of the tubular object caused by the spiral winding free forming process. At the same time, the one-time forming of the tubular object also results in a high degree of roundness, effectively improving the appearance and roundness quality of the tubular object. On the other hand, the produced double-layer tubular object only has adhesive applied to one strip, which reduces the amount of adhesive used compared to the spiral winding method where adhesive is applied between every two layers of strip. This improves food safety and reduces the odor caused by the adhesive. On the other hand, by bonding multiple narrow strips from the same original material onto a wide strip and then cutting them into multiple double-layer strips, it is possible to ensure that the two layers of material used to produce double-layer tubular objects are completely identical at the same time. This facilitates control over the adhesives and processing techniques used, reduces product variation, and improves product quality. In addition, multiple double-layer strips of the same material are formed simultaneously in parallel on the conveyor line through multiple forming components, which can significantly increase production efficiency compared to a single production line that can only produce one paper tube.

[0117] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A tubular object manufacturing apparatus, characterized in that, include: A first slitting assembly is used to slit the original strip into at least three strips, wherein at least one of the at least three strips is a wide strip and at least two narrow strips are narrower than the wide strip. The first slitting assembly is also used to output the slitted wide strip along a first plane and output the slitted narrow strip along a second plane that does not coincide with the first plane. An adhesive application assembly, located downstream of the first slitting assembly, is used to apply adhesive to one surface of the wide or narrow strip; An adhesive assembly, disposed downstream of the gluing assembly, is used to bond each wide strip to at least two adjacent narrow strips in such a way that the narrow strips are on the same plane through the adhesive coating surface to form a double-layer adhesive strip, and there is a gap between the bonded adjacent narrow strips. The second cutting component is located downstream of the bonding component and is used to cut the double-layer adhesive strip output by the bonding component along the gap between adjacent narrow strips to obtain at least two double-layer strips. N Each forming component is used to coil a double-layer strip into a continuous double-layer tubular structure with its axis parallel to the conveying direction; wherein, N This is equal to the total number of narrow strips cut by the first slicing component. N It is a positive integer greater than 1; The bonding assembly includes a bonding bottom roller and a third pressing roller. The roller surfaces of the bonding bottom roller and the third pressing roller are arranged opposite each other, and their axes are parallel to each other and transverse to the conveying direction of the narrow strip. The spacing between the bonding bottom roller and the third pressing roller is set so that when the wide strip and the narrow strip pass through, their strip surfaces come into contact and are bonded together to form a double-layer bonded strip.

2. The tubular material manufacturing apparatus according to claim 1, characterized in that, The manufacturing apparatus further includes: a first translation component and / or a second translation component; The first translation component is disposed downstream of the first slitting component and is used to translate the multiple narrow strips along their width direction so that there is a gap of a predetermined width between adjacent narrow strips and the strip surfaces of adjacent narrow strips are output along the third plane. The second translation component is located downstream of the second slitting component and is used to translate each double-layer strip output by the second slitting component along its width direction so that each double-layer strip is translated to the center position of a forming component inlet.

3. The tubular material manufacturing apparatus according to claim 2, characterized in that, The first slitting component slits the original strip into sections along its width. n The strip group comprises a first strip with a first width, a second strip with a second width, and a third strip with a third width; wherein the second width is greater than the first width and the third width. n It is a positive integer. N =2 n ; The first translation component will the first i The first and third strips in the strip group are translated along their width direction and then output; among them, i =1,2,…, n ; The adhesive component will... i The gap center lines of the first and third strips output by the first translation component in the group of strips are aligned with the first... i The center line of the width direction of the second strip in the group of strips is aligned in a direction perpendicular to the strip surface. The second strip is then bonded to the adhesive coating surface. i The first, second, and third strips in the group of strips are bonded together as a double-layer adhesive strip with the first and second strips on the same layer, forming a triangular structure.

4. The tubular material manufacturing apparatus according to claim 3, characterized in that, The n =1, the first slitting component sequentially slits the original strip into a first strip, a second strip, and a third strip in the width direction; the first width is equal to the third width, and the second width is equal to the third width. L 2 and first width L 1. Satisfies the following relation: L 2=2 L 1± l ,in, l This is the preset difference; The second slitting component slits the double-layer adhesive strip with the triangular structure along the center line of the gap between the first strip and the third strip to obtain a first double-layer strip composed of a fourth strip and a first strip, and a second double-layer strip composed of a fifth strip and a third strip. The manufacturing apparatus specifically includes a first molding assembly and a second molding assembly; The first forming component curls the first double-layer strip upwards / downwards along its width direction on the left and right sides, so that the front end face of the first double-layer strip is formed into a circle, and the left and right sides of the fourth strip are opposite to each other, and the left and right sides of the first strip are opposite to each other. The second forming component curls the second double-layer strip upwards / downwards along its width direction, so that the front end face of the second double-layer strip is formed into a circle, the left and right sides of the fifth strip are opposite each other, and the left and right sides of the third strip are opposite each other.

5. The tubular material manufacturing apparatus according to claim 1, characterized in that, The widths of any two narrow strips obtained by the first slicing component are equal or unequal; The adhesive component will input adjacent k A narrow strip is bonded to a wide strip, the width of which is greater than or equal to that of the adjacent strip. k The sum of the widths of the narrow strips; among which, k It is a positive integer greater than or equal to 2.

6. The tubular material manufacturing apparatus according to claim 1, characterized in that, The adhesive application assembly includes an adhesive supply component and a nozzle; the adhesive supply component is connected to the nozzle and supplies adhesive to the nozzle; the nozzle has a preset shape so that when the adhesive outlet is used to apply adhesive to the surface of the wide strip, at least one adhesive-free area extending along the length direction of the wide strip is formed on the adhesive application surface of the wide strip. The bonding assembly aligns the center line of the gap between adjacent narrow strips with the center line of the glue-free area on the input wide strip in a direction perpendicular to the strip surface, and bonds the narrow strips to the wide strip through the glue coating surface. The second slitting component slits the double-layer adhesive strip along the glue-free area.

7. The tubular material manufacturing apparatus according to claim 1, characterized in that, The first slitting assembly includes a first cutting roller and a first conveying roller that rotate around their own axis; the roller surfaces of the first cutting roller and the first conveying roller are arranged opposite each other, and their axes are parallel to each other and transverse to the conveying direction of the original strip; the first cutting roller is provided with a plurality of first rotating circular blades, and the roller surface of the first conveying roller has a first annular cutting groove matching each first rotating circular blade or a first lower blade meshing with each first rotating circular blade in the circumferential direction; and / or The second slitting assembly includes a second cutter roller and a second conveyor roller that rotate around their own axis; the roller surfaces of the second cutter roller and the second conveyor roller are arranged opposite each other, and their axes are parallel to each other and transverse to the conveying direction of the original strip; the second cutter roller is provided with a plurality of second rotating circular cutters, and the roller surface of the second conveyor roller has a second annular cutting groove that matches each second rotating circular cutter or a second lower blade that meshes with each second rotating circular cutter in the circumferential direction.

8. The tubular material manufacturing apparatus according to claim 3, characterized in that, The first translation component includes at least one set of gathering roller components. The gathering roller components include two first guide rollers that are installed at a certain angle and rotate about their own axes. The axes of the two first guide rollers are in a shape that is low in the middle and high on both sides in a cross section perpendicular to the input direction of the first and third strips. and / or The second translation component includes at least one set of separation roller assemblies, each comprising two second guide rollers mounted at a certain angle and rotating about their own axes. The axes of the two second guide rollers are shaped such that the middle is higher than the sides in a cross section perpendicular to the input direction of the two double-layer strips.

9. The tubular material manufacturing apparatus according to claim 4, characterized in that, The first double-layer strip and the second double-layer strip are conveyed in the same direction and parallel to each other along the centerline of the length direction in the same fourth plane; The first forming component and the second forming component are arranged in a mirror image to the left and right in the horizontal direction of the conveying direction of the double-layer strip; Alternatively, the first forming component and the second forming component may be arranged in a staggered manner or side by side in the conveying direction of the double-layer strip.

10. The tubular material manufacturing apparatus according to claim 1, characterized in that, The manufacturing apparatus further includes: a strip feeding assembly and / or an auxiliary material strip feeding assembly and / or a cutting assembly, and a conveying assembly; The strip supply assembly is located upstream of the first slitting assembly and is used to continuously supply the coiled strip to the first slitting assembly after unwinding it into raw strip. The auxiliary material supply assembly is used to provide the molding assembly with auxiliary material strips as inner lining and / or outer wrapping material for the double-layer tubular structure; wherein, the molding assembly is also used to introduce the auxiliary material strips and form the auxiliary material strips into an inner lining inside the double-layer tubular structure and / or wrap the double-layer tubular structure in a pre-set shape or structure. The cutting component is located downstream of the forming component and is used to cut the continuous double-layer tubular material output by the forming component into tubular rods of a specified length. The conveying component is located downstream of the cutting component and is used to arrange and output the tubular rods output by the cutting component in an orderly manner.

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