EP2845499B1 - Machine à fabriquer des tubes de papier, procédé de fabrication de ces derniers et tube de papier fabriqué par ledit procédé de fabrication - Google Patents

Machine à fabriquer des tubes de papier, procédé de fabrication de ces derniers et tube de papier fabriqué par ledit procédé de fabrication Download PDF

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Publication number
EP2845499B1
EP2845499B1 EP12887644.8A EP12887644A EP2845499B1 EP 2845499 B1 EP2845499 B1 EP 2845499B1 EP 12887644 A EP12887644 A EP 12887644A EP 2845499 B1 EP2845499 B1 EP 2845499B1
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EP
European Patent Office
Prior art keywords
paper
web
paper web
forming
paper tube
Prior art date
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Application number
EP12887644.8A
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German (de)
English (en)
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EP2845499A4 (fr
EP2845499A1 (fr
Inventor
Takeshi Matsumura
Tomoichi Watanabe
Hiroshi Sasaki
Masaaki Kobayashi
Masaki Watanabe
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Japan Tobacco Inc
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Japan Tobacco Inc
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Publication of EP2845499A1 publication Critical patent/EP2845499A1/fr
Publication of EP2845499A4 publication Critical patent/EP2845499A4/fr
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    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24C—MACHINES FOR MAKING CIGARS OR CIGARETTES
    • A24C5/00—Making cigarettes; Making tipping materials for, or attaching filters or mouthpieces to, cigars or cigarettes
    • A24C5/46—Making paper tubes for cigarettes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31C—MAKING WOUND ARTICLES, e.g. WOUND TUBES, OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31C5/00—Making tubes or pipes without using mandrels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F1/00—Mechanical deformation without removing material, e.g. in combination with laminating
    • B31F1/08—Creasing

Definitions

  • the present invention relates to a paper tube manufacturing machine, which continuously manufactures single-layered flatwise paper tubes from a paper web made of thick paper, a paper tube manufacturing method, and a paper tube manufactured by the manufacturing method.
  • a flavor inhaler disclosed in Patent Document 1 listed below includes a heat source disposed at the distal end thereof and a flavor generation source disposed downstream from the heat source therein, and the flavor generation source generates flavor components using the heat of the heat source.
  • This type of flavor inhaler further includes a pipe member for supporting or housing the heat source, the flavor generation source, etc., and in the case of Patent Document 1, a paper tube is used for the pipe member. The following are two requirements for such a paper tube used as the pipe member.
  • the paper tube must be rigid enough not to be easily crushed when held between the fingers of a user.
  • the paper tube contain as little adhesive as possible, since the adhesive used in manufacture of the paper tube has the property of sorbing the flavor components generated from the flavor generation source.
  • the paper tubes are broadly classified into a spiral type and a flatwise type.
  • the spiral paper tube is formed by spirally winding a thin paper web around the outer circumference of a mandrel to a predetermined thickness.
  • the flatwise paper tube is formed by winding a paper web around the outer circumference of a mandrel in a direction perpendicular to the axis of the mandrel.
  • the flatwise paper tubes are further classified into a multi-layer type with a paper web wound in several layers to a predetermined thickness, and a single-layer type with a paper web wound in a single layer.
  • the single-layer flatwise paper tube has a lapped portion where both side edges of the paper web are lapped and bonded with each other.
  • the spiral paper tube and the multi-layered flatwise paper tube have a rigidity which allows them to serve as the pipe member of the flavor inhaler.
  • Such paper tubes are manufactured with an adhesive applied to the entire surface of the paper web, they contain a large amount of the adhesive which sorbs flavor components, and are therefore unsuitable as the pipe member of the flavor inhaler.
  • the single-layered flatwise paper tube contains an adhesive only in the lapped portion, and is suitable as the pipe member of the flavor inhaler in terms of sorption of flavor components.
  • the single-layered flatwise paper tube is not suitable as the pipe member of the flavor inhaler.
  • using a thick paper web to manufacture the single-layered flatwise paper tube is likely to increase the rigidity of the flatwise paper tube.
  • the low flexibility of a thick paper web makes it difficult to manufacture a flatwise paper tube with a small inner diameter which is suitable as the pipe member of the flavor inhaler.
  • the paper web develops creases when the paper web is wound around the mandrel, and the lapped portion of the paper tube bursts open due to the repulsive force of the wound paper web after completion of winding of the paper web, so that stable manufacture of the flat-wound paper tube is not secured.
  • the flatwise paper tube is removed from the mandrel each time the flatwise paper tube is manufactured, and cannot be continuously manufactured on the mandrel.
  • An object of the present invention is to provide a paper tube manufacturing machine, which can continuously manufacture a slim , single-layered flatwise paper tube having a desired rigidity while reducing the amount of adhesive used, a paper tube manufacturing method, and a paper tube manufactured by the manufacturing method.
  • This paper tube manufacturing machine is equipped with: a transfer path for guiding transfer of a paper web, the paper web having multiple grooves which extend along a transfer direction of the paper web and increase the flexibility of the paper web; and a web bending device disposed on the transfer path, for bending the paper web, wherein the web bending device includes: an endless garniture belt for transferring the paper web along the transfer path; a tube forming section for forming the paper web continuously into a hollow cylindrical paper tube through the garniture belt while maintaining the inner surface of the paper web in a free state in the cource of the transfer of the paper web, the paper tube having a lapped portion where both side edges of the paper web are lapped; and an applicator for applying an adhesive to one of both side edges of the paper web before the lapped portion is formed, to thereby bond both side edges with each other in the lapped portion.
  • the multiple grooves impart a desired softness to the paper web. Therefore, when the paper web passes through the tube forming section, the tube forming section can form the paper web continuously and stably into a paper tube.
  • the paper web forming the paper tube has both side edges just bonded through the adhesive in the lapped portion, and the amount used of the adhesive required for forming the paper tube is small.
  • the paper material for forming the paper web is itself highly rigid and, moreover, the paper tube has a closed shape, the paper tube is highly rigid in both directions of the radial direction and the axial direction regardless of with or without the grooves.
  • the paper web has a basis weight of 100 to 300 g/m 2 , a thickness of 150 to 500 ⁇ m, and a density of 0.5 g/cm 3 or higher, and the paper tube can have a diameter of, for example, 5 to 8 mm.
  • the groove can be formed by cutting or using an impression line, and particularly a cut groove formed by cutting is preferable in order to effectively increase the flexibility of the paper web. More particularly, in the case of a cut groove, the cut groove can have a depth of 60 to 90% of the thickness of the paper web, and the interval between adjacent grooves is preferably 2 mm or smaller.
  • the paper tube manufacturing machine is further equipped with: a guide path disposed upstream from the transfer path, for guiding a web-like paper material for forming the paper web onto the transfer path; and a groove forming device disposed on the guide path, for forming multiple grooves in the inner surface of the paper material.
  • the paper tube manufacturing machine forms online a paper web having multiple grooves.
  • the above-described groove forming device includes: a pair of groove processing rollers, which cooperat together to pinch the paper material on the guide path between them, for example, a cutting roller and a receiving roller if a cut groove is to be formed.
  • a cutting roller has multiple circular cutting blades arranged in the axial direction thereof, and these circular cutting blades rotate together with the cutting roller to form grooves in the paper material. It is preferable that the circular cutting blade has a cutting edge angle of, for example, 14 to 30°.
  • the groove forming device can further include a drive source for rotating the cutting roller so as to make the circumferential speed of the circular cutting blade equal to the feeding speed of the paper material.
  • a drive source for rotating the cutting roller so as to make the circumferential speed of the circular cutting blade equal to the feeding speed of the paper material.
  • the web bending device can further include a press roller disposed upstream from the tube forming section, and the press roller presses the paper web against the garniture belt.
  • a press roller increases the frictional force between the garniture belt and the paper web, thereby assisting the garniture belt in transferring the paper web.
  • the web bending device can further include a drive source for rotating the press roller so as to make the circumferential speed of the press roller equal to the transfer speed of the paper web.
  • a drive source for rotating the press roller so as to make the circumferential speed of the press roller equal to the transfer speed of the paper web.
  • the web bending device further includes: a forming bed extending along the transfer direction of the paper web; and a forming groove formed in the forming bed, for guiding the transfer of the paper web and the garniture belt and forming the paper web through the garniture belt into a U-shape before the paper web and the garniture belt pass through the tube forming section.
  • the above-described press roller is disposed in the forming groove and presses the U-shaped paper web through the garniture belt against the bottom of the forming groove.
  • the rigidity of the paper web formed in a U-shape is higher than the rigidity of the flat paper web. Therefore, the above-described arrangement of the press roller, in which the transfer of the paper web increased in rigidity is assisted by the press roller, is suitable for stabilizing the transfer of the paper web.
  • the web bending device can further include a preliminary forming guide disposed upstream from the tube forming section, for forming both side edges of the paper web into an arc shape.
  • a preliminary molding guide uniformly imparts a travel resistance to both side edges of the paper web and at the same time pre-bends them. Therefore, both side edges of the paper web can pass through the tube forming section smoothly and the paper web is easily and stably formed into a paper tube.
  • the paper bending device is further equipped with a dryer disposed downstream from the tube forming section, for drying the lapped portion of the paper tube.
  • This dryer can include: a heater; a heating rib integrally formed in the heater, for pressing the lapped portion of the paper tube while in sliding contact with the lapped portion; and a pair of regulation guides for pressing both side surfaces of the paper tube through the garniture belt while in sliding contact with both side surfaces during drying of the lapped portion.
  • Such a pair of regulation guides prevents the paper tube from expanding in the width direction even when the lapped portion is pressed by the heating rib during drying of the lapped portion. Therefore, both side edges of the paper web are favorably bonded with each other through the adhesive without the overlap of both side edges being separated in the lapped portion.
  • the present invention also provides a paper tube manufacturing method and a paper tube manufactured by the manufacturing method.
  • the details of the paper tube manufacturing machine, the manufacturing method, and the paper tube will be revealed by the following description.
  • the paper tube manufacturing machine and the paper tube manufacturing method of the present invention use a paper web which is provided with multiple grooves, it is possible to form a paper web into a paper tube easily and continuously even when the paper material for forming the paper web is thick and highly rigid.
  • the paper tube is a single-layered flatwise paper tube, the amount used of the adhesive required for forming the paper tube is small, and since the rigidity of the paper material itself is high, the formed paper tube can have a required rigidity in both the radial direction and the axial direction thereof regardless of with or without the grooves.
  • FIG. 1 there is shown a paper tube manufacturing machine of one embodiment; in the course of the description of the paper tube manufacturing machine, a paper tube manufacturing method will also be revealed.
  • the paper tube manufacturing machine includes a main frame 10, and a web roll WR is rotatably supported through a bobbin holder 12 in a lower part of the main frame 10.
  • the bobbin holder 12 is represented only by its hollow shaft at the center thereof.
  • the web roll WR can feed a web-like paper material P along a feed path 14, and in this embodiment, the paper material P has a sufficiently larger thickness and a higher rigidity compared with a cigarette paper used for cigarettes.
  • the paper material P has a width of approximately 16.7 to 28.1 mm, a basis weight of 100 to 300 g/m 2 , a thickness of 150 to 500 ⁇ m, and a density of 0.5 g/cm 3 or higher.
  • the feed path 14 is defined by a number of guide rollers 16 and connects the web roll WR and a web bending device 18.
  • the web bending device 18 is disposed above the web roll WR and is supported by the main frame 10. Therefore, when viewed in FIG. 1 , the feed path 14 extends horizontally from the web roll WR to the right, thereafter extends upward to the reference height of the web bending device 18, and then extends horizontally to the left to reach the web bending device 18.
  • the web bending device 18 includes a forming bed 20, and the forming bed 20 extends horizontally at the reference height. Part of an endless garniture belt 22 is disposed on the forming bed 20. Specifically, the garniture belt 22 has an advancing portion extending horizontally on the forming bed 20 and a returning portion located the outside of the forming bed 20.
  • the returning portion of the garniture belt 22 is guided by a number of guide rollers 24, and is wound around a drive drum 26 at a predetermined winding angle.
  • the drive drum 26 is connected with the output shaft of an electric motor (not shown), and is rotated at a constant circumferential speed by the drive force of the electric motor. The rotation of such a drive drum 26 causes the advancing portion of the garniture belt 22 to travel at a constant speed from right to left when viewed in FIG. 1 .
  • the paper material P is introduced from the above-described feed path 14 onto the advancing portion of the garniture belt 22 and is lapped over the garniture belt 22. Therefore, the paper material P travels along with the advancing portion of the garniture belt 22 due to the frictional force between the garniture belt 22 and the paper material P, and this travel causes the paper material P to be delivered from the web roll WR at a constant speed.
  • the above-mentioned bobbin holder 12 has a built-in brake (not shown), and this brake imparts a predetermined tensile force to the paper material P.
  • a groove forming device 28 is disposed on the feed path 14; the details of this groove forming device 28 are shown in FIG. 2 and FIG. 3 .
  • the groove forming device 28 includes a cutting roller 30 and a receiving roller 32. These cutting roller 30 and receiving roller 32 are disposed so as to pinch the paper material P on the feed path 14 between them, and are rotatably supported by the main frame 10.
  • the cutting roller 30 has multiple circular cutting blades 34 protruding from an outer circumferential surface thereof, and these circular cutting blades 34 are disposed at predetermined intervals in the axial direction of the cutting roller 30.
  • the circular cutting blades 34 have a sharp cutting edge, and the angle of this cutting edge, namely, the cutting edge angle ⁇ is, for example, 14 to 30°.
  • the receiving roller 32 has a smooth outer circumferential surface.
  • each of the circular cutting blades 34 forms a V-shaped cut groove G in one surface of the paper material P, and these cut grooves G have an opening angle ⁇ corresponding to the cutting edge angle ⁇ . Therefore, the paper material P after passing through the groove forming device 28 has become a paper web PW having the multiple cut grooves G.
  • Such multiple cut grooves G extend continuously in the feed direction of the paper material P, namely, in the longitudinal direction of the paper material P, and increase the flexibility of the paper web PW.
  • the cut grooves G are formed in the inner surface of the paper material P which faces upward when the paper web PW is lapped over the garniture belt 22, although these grooves may be formed in the outer surface of the paper material P on the garniture belt 22 side.
  • the cut grooves G are deformed such that the two opposite inner surfaces of the cut groove G come closer to or into contact with each other when the paper tube is formed from the paper web PW.
  • such a paper tube can have a higher rigidity compared with a paper tube made of a paper web with the cut grooves G formed in the outer surface of the paper material P.
  • each of the cut grooves G has a depth D G of 60 to 90% of the thickness T of the paper material P, and the interval S between adjacent cut grooves G is 2 mm or smaller.
  • the interval S is determined by the interval between adjacent circular cutting blades 34, while the depth D G is determined by the clearance between the cutting edge of the circular cutting blade 34 and the outer circumferential surface of the receiving roller 32.
  • the clearance is adjustable.
  • the cutting roller 30 and the receiving roller 32 can also form the multiple cut grooves G in the paper material P just by being rotatably supported by the main frame 10.
  • the cutting roller 30 is forcibly rotated along the feed direction of the paper web PW, and that the circumferential speed of the cutting edge in the circular cutting blade 34 is made equal to the feed speed of the paper material P.
  • a speed difference may be provided between the circumferential speed of the cutting roller 30 and the feed speed of the paper web PW, or the rotation direction of the cutting roller 30 and the feed direction of the paper web PW may be set to be opposite to each other.
  • the roller shaft of the cutting roller 30 is connected with a drive source, namely, an electric motor 30 M .
  • this electric motor 30 M is electrically connected with a rotary encoder 38, and this rotary encoder 38 is mounted on the drum shaft of the drive drum 26 described above.
  • the rotary encoder 38 sends a rotation signal indicating the circumferential speed of the drive drum 26 to the electric motor 30 M , and on the basis of this signal, the electric motor 30 M rotates the cutting roller 30 so as to make the circumferential speed of the cutting edge in the circular cutting blade 34 equal to the circumferential speed of the drive drum 26, namely, the feed speed of the paper material P.
  • the paper material P after passing through the groove forming device 28 has become the paper web PW having the multiple cut grooves G. That is, in this embodiment, the above-described feed path 14 is divided into an upstream portion and a downstream portion at the groove forming device 28, the upstream portion defining a guide path 14 U for guiding the paper material P, while the downstream portion defining the transfer path 14 D for transferring the paper web PW toward the web bending device 18.
  • travel guides 40 are disposed each immediately upstream and immediately downstream from the groove forming device 28. These travel guides 40 guide the travel of the paper material P and the paper web PW, and serve to make the formation of the above-described cut grooves G more stable.
  • the web bending device 18 further includes an applicator 42 of an adhesive, the applicator 42 being disposed on the transfer path 14 D ; the details of this applicator 42 are shown in FIG. 5 .
  • the applicator 42 includes an application nozzle 44, and the application nozzle 44 is disposed immediately above the paper web PW on the transfer path 14 D so as to face downward.
  • the application nozzle 44 is disposed immediately above one of both side edges E 1 and E 2 of the paper web PW, that is, the side edges E 1 which is located on the near side when viewed in FIG. 5 .
  • the application nozzle 44 is connected with an electric pump 46, and the electric pump 46 is connected with an adhesive tank 48.
  • the electric pump 46 suctions the adhesive from the tank 48 while feeding the suctioned adhesive into the application nozzle 44, and thereby the application nozzle 44 discharges the adhesive toward the paper web PW and continuously applies the adhesive to the side edge E 1 of the paper web PW.
  • the paper web PW having passed the application nozzle 44 has an adhesive layer A extending along the side edge E 1 .
  • the width of the adhesive layer A is, for example, approximately 1 to 3 mm. It is preferable that such an adhesive layer A is formed of a constant amount of adhesive per unit length.
  • the electric pump 46 is electrically connected with a controller 50 which controls the amount of adhesive discharged from the application nozzle 44.
  • This controller 50 receives a rotation signal sent from the above-mentioned rotary encoder 38 and supplies an application amount signal, which is proportional to the travel speed of the paper web PW, to the electric pump 46.
  • the electric pump 46 is driven in accordance with the application amount signal, and makes the application nozzle 44 discharge the adhesive in a discharge amount corresponding to the travel speed of the paper web PW.
  • the applicator 42 further includes a support 52 disposed immediately under the transfer path 14 D .
  • This support 52 guides the travel of the paper web PW and maintains a constant aerodynamic force between the side edge E of the paper web PW and the application nozzle 44.
  • a glue for food-related materials is suitable as the adhesive.
  • the adhesive is selected from the group of CMC-Na, vinyl acetate, EVA, pullulan, and pectin.
  • FIG. 6 is a plan view showing a starting end part of the above-mentioned forming bed 20.
  • a forming groove 54 is formed in the upper surface of the forming bed 20, and the forming groove 54 extends along the entire length of the forming bed 20 and opens in the shape of a fan in the starting end part of the forming bed 20. Specifically, the forming groove 54 gradually decreases in width from the starting end toward the terminal end of the forming bed 20, and has a constant width in the region except for the starting end part of the forming bed 20.
  • the above-described forming groove 54 guides the travel of the garniture belt 22 and the paper web PW. Therefore, when these garniture belt 22 and paper web PW proceed inside the forming groove 54, as is clear from FIG. 7 , the garniture belt 22 and the paper web PW are formed by the forming groove 54 into a U-shape in traverse cross-section.
  • the web bending device 18 further includes a press roller 56.
  • This press roller 56 is rotatably supported in the starting end part of the forming bed 20.
  • the lower part of the press roller 56 is positioned inside the forming groove 54, and the press roller 56 together with the garniture belt 22 presses the paper web PW, which is in the process of being formed into a U-shape, against the garniture belt 22, namely, the bottom of the forming groove 54.
  • Such a press roller 56 serves to increase the frictional force between the paper web PW and the garniture belt 22 and allow the paper web PW to travel along with the garniture belt 22. Therefore, in order to further increase the frictional force, the outer circumferential surface of the press roller 56 is preferably coated with a friction layer 58 as shown in FIG. 8 , and for example, the friction layer 58 can be formed from an elastic material such as rubber.
  • the press roller 56 rotates by being dragged by the paper web PW.
  • the press roller 56 is forcibly rotated at a circumferential speed equal to the travel speed of the paper web PW.
  • the roller shaft of the press roller 56 is connected with a drive source, namely, an electric motor 56 M , and this electric motor 56 M rotates the press roller 56 on the basis of the aforementioned rotation signal.
  • the above-described press roller 56 can also be disposed so as to cooperate with the guide roller 24 to pinch the paper web PW and the garniture belt 22 between them near the starting end of the forming bed 20.
  • the rigidity of the paper web PW when it is formed in a U-shape is higher than the rigidity of the paper web PW when it is flat. Therefore, the press roller 56 disposed in the forming groove 54 can impart a more powerful feeding force to the paper web PW without causing undesirable deformation of the paper web PW.
  • the above-described web bending device 18 further includes a tube forming section 60, and this tube forming section 60 is disposed downstream from the press roller 56, immediately above the forming bed 20.
  • FIG. 9 is a plan view of the tube forming section 60.
  • the tube forming section 60 includes a first forming guide 62 and a second forming guide 64, and these first and second forming guides 62 and 64 extend along the travel direction of the paper web PW.
  • the first forming guide 62 is disposed on the far side in the forming bed 20, namely, on the side edge E 2 side of the paper web PW
  • the second forming guide 64 is disposed immediately downstream from the first forming guide 62 in the travel direction of the paper web PW, on the side edge E 1 side of the paper web PW.
  • the first and second forming guides 62 and 64 have ceiling surfaces 62c and 64c, respectively, facing the forming groove 54, and these ceiling surfaces 62c and 64c have a shape of an arc of approximately a quarter of a circle. These ceiling surfaces 62c and 64c are open wider at the starting end of the corresponding forming guide, and are gradually narrowed into an arc shape from the starting end to the terminal end of the forming guide.
  • a side surface S 2 of the paper web PW on the side edge E 2 side enters the first forming guide 62 along with the garniture belt 22, and the side surface S 2 is guided to the ceiling surface 62c through the garniture belt 22 and bent into an arc shape.
  • the side surface S 1 of the paper web PW on the side edge E 1 side enters the second forming guide 64 along with the garniture belt 22, and the side surface S 1 is guided through the garniture belt 22 to the ceiling surface 64c and bent into an arc shape.
  • FIG. 11 shows how the side surface S 1 is bent after the side surface S 2 .
  • the side edge E 1 of the side surface S 1 is lapped over the side edge E 2 of the side surface S 2 which has been bent into an arc shape, and these side edges E 1 and E 2 form a lapped portion L.
  • the adhesive layer A see FIG. 5
  • the side edges E 1 and E 2 forming the lapped portion L are bonded with each other through the adhesive layer A.
  • the paper web PW is formed into a hollow tube HT with a diameter of 5 to 8 mm, and this hollow tube HT is continuously sent out from the tube forming section 60.
  • the tube forming section 60 is basically similar in structure to the rod forming section of a manufacturing machine for manufacturing cigarette rods or filter rods.
  • a preliminary forming guide 66 is disposed immediately upstream from the tube forming section 60, and the preliminary forming guide 66 has a shape of, for example, a halved taper tube, and has a semi-circular ceiling surface 66c facing the forming groove 54.
  • the ceiling surface 66c is open wider at the starting end of the preliminary forming guide 66 and is narrowed into a semi-circular shape toward the terminal end of the preliminary forming guide 66.
  • both the side surfaces S 1 and S 2 of the paper web PW enter the preliminary forming guide 66 and are concurrently curved into an arc shape by the ceiling surface 66c of the preliminary forming guide 66.
  • the preliminary forming guide 66 preliminarily curves the side surfaces S 1 and S 2 of the paper web PW on the upstream of the tube forming section 60, and imparts a travel resistance through the garniture belt 22 to each of the side surfaces S 1 and S 2 . Therefore, even when, at the downstream of the preliminary forming guide 66, the side surface S 2 of the paper web PW enters the first forming guide 62 of the tube forming section 60 and the travel resistance is imparted to one side of the paper web PW through the side surface S 2 thereof, the travel of the paper web PW does not become unstable.
  • the preliminary forming guide 66 pre-bends the side surfaces S 1 and S 2 of the paper web PW, the side surfaces S 1 and S 2 enter the tube forming section 60 more smoothly.
  • the press roller 56 when the above-described press roller 56 is rotated by the electric motor 56 M , the press roller 56 forcibly feeds the paper web PW toward the tube forming section 60.
  • the press roller 56 and the preliminary forming guide 66 work together or individually to allow the side surface S 2 of the paper web PW to smoothly enter the first forming guide 62, and the preliminary forming guide 66 serves to stabilize the forming of the above-described hollow tube HT.
  • a dryer 68 is disposed immediately downstream from the above-described tube forming section 60.
  • the dryer 68 includes an electric heater 70 having a block-like shape.
  • the heater 70 is disposed immediately above the forming groove 54 and extends along the travel direction of the paper web PW.
  • a heating rib 72 integrally protrudes from the lower surface of the heater 70, and the heating rib 72 also extends in the travel direction of the paper web PW.
  • the lapped portion L of the hollow tube HT sent out from the tube forming section 60 is pressed by the heating rib 72, and at the same time, comes into sliding contact with the heating rib 72. Therefore, the lapped portion L is subjected to the heat from the heating rib 72 and dried, and thereby the side edges E 1 and E 2 forming the lapped portion L are firmly bonded with each other.
  • regulation guides 74 are disposed on both sides of the heater 70, and these regulation guides 74 extend in the travel direction of the paper web PW.
  • the hollow tube HT sent out from the tube forming section 60 is sandwiched from both sides between the regulation guides 74 and comes into sliding contact with these regulation guides 74.
  • the regulation guides 74 prevent the hollow tube HT from expanding in the width direction. Therefore, during the drying treatment of the lapped portion L, the overlap of the side edges E 1 and E 2 forming the lapped portion L is not separated, and these side edges E 1 and E 2 are favorably bonded with each other.
  • the heating temperature of the heater 70 required for the drying treatment of the lapped portion L was approximately 170°C, although it depends on the type of the adhesive.
  • the drying state of the adhesive in the lapped portion L is determined by the heating temperature and the heating time of the adhesive.
  • the heating temperature required of the heater 70 be set higher than the heating temperature H T obtained from the above formula.
  • a cutting device 76 is disposed downstream from the web bending device 18.
  • the hollow tube HT having passed through the web bending device 18 passes through the cutting device 76 in which the hollow tube HT is cut into predetermined lengths, and the individual paper tubes PT are formed at this time.
  • Table 1 shows the relation between the depth of the cut grooves G of the paper web PW and creases of the paper web PW appearing in the outer circumferential surface of the formed paper tube PT.
  • the paper web PW of the paper tube PT had a basis weight of 200 g/m 2 , a thickness of 250 ⁇ m, a density of 0.83 g/m 3 , and the diameter of the paper tube PT was 7.2 mm.
  • [Table 1] CUT GROOVE DEPTH D G 0% 60% 70% 80% 90% CREASE WITH CREASE WITHOUT CREASE WITHOUT CREASE WITHOUT CREASE WITHOUT CREASE WITHOUT CREASE WITHOUT CREASE WITHOUT CREASE
  • the creases of the paper tube PT is likely to occur in the forming process, especially in the process of the U-shaped paper web PW passing through the tube forming section 60. That is, when the flexibility of the side surfaces S 1 and S 2 in the paper web PW is low, these side surfaces S 2 and S 1 cannot smoothly enter the first forming guides 62 and 64 and are buckled at the inlet of these forming guides 62 and 64.
  • FIG. 13 shows the relation between the depth of the cut grooves G and the radial strength of the paper tube PT
  • FIG. 14 shows the relation between the depth of the cut grooves G and the axial strength of the paper tube PT.
  • the strengths of a cigarette and a cigarette filter are also shown.
  • FIG. 13 The results of FIG. 13 were obtained with a first test device 78 shown in FIG. 15 and FIG. 16 .
  • This first test device 78 includes a rest 80, and the rest 80 has a V-shaped groove 82 on the upper surface thereof.
  • the paper tube PT under test is retained in a horizontal posture inside the V-shaped groove 82.
  • the first test device 78 further includes a pusher 84, and the pusher 84 is disposed above the reste 80 so as to be able to move up and down.
  • the pusher 84 is lowered toward the paper tube PT retained on the rest 80, and pushes the outer circumferential surface of the paper tube PT by a predetermined distance in the radial direction of the paper tube PT.
  • the first test device 78 measured the reaction force, which was received from the paper tube PT through the pusher 84, as the radial strength of the paper tube PT.
  • the radial strengths of the cigarette and the filter were also measured in the same manner as with the paper tube PT.
  • the results of FIG. 14 were obtained with an axial test device 86 shown in FIG. 17 and FIG. 18 .
  • the test device 86 includes a flat base 88, and the paper tube PT under test was placed on the base 88 in a vertical posture.
  • the test device 86 also further includes a pusher 90, and the pusher 90 can also move up and down.
  • the pusher 90 is lowered toward the upper end of the paper tube PT from above the paper tube PT, and pushes the upper end of the paper tube PT by a predetermined distance in the axial direction of the paper tube PT.
  • the test device 86 measured the reaction force, which was received from the paper tube PT through the pusher 90, as the axial strength of the paper tube PT.
  • the axial strengths of the cigarette and the filter were also measured in the same manner as with the paper tube PT.
  • the strength of the paper tube PT having the cut grooves G tends to be lower than the strength of the paper tube PT having no cut grooves G. However, there is little difference between these strengths.
  • the strength of the paper tube PT having the cut grooves G is sufficiently higher compared with the strength of the cigarette or the filter. This means that the paper tube PT is rigid enough not to be easily crushed by the force with which it is held lightly between the fingers of a user.
  • the paper tube PT having the cut grooves G has sufficient rigidity in both the radial direction and the axial direction, and at the same time, as described above, can be continuously manufactured with the above-described paper tube manufacturing machine without developing creases on the outer circumferential surface thereof.
  • the paper tube PT of this embodiment is suitable for the pipe member of the above-described flavor inhaler.
  • the present invention is not restricted to the paper tube manufacturing machine of the above-described one embodiment or the paper tube manufacturing method implemented with the paper tube manufacturing machine.
  • the paper web PW may also be formed by a web manufacturing machine separate from the paper tube manufacturing machine; FIG. 19 shows one example of the web manufacturing machine.
  • the web manufacturing machine includes a web roll WR 1 of the paper material P, and the web roll WR 1 is connected with the bobbin holder 12 through a travel path 92.
  • the travel path 92 is defined by many guide rollers 94.
  • the bobbin holder 12 is connected with an electric motor 96, and the electric motor 96 rotates the bobbin holder 12 such that the travel of the paper material P (paper web PW) becomes constant.
  • the paper material P paper web PW
  • the paper material P is delivered from the web roll WR 1 .
  • the delivered paper material P travels along the travel path 92 and is wound around the bobbin holder 12.
  • the groove forming device 28 described above is disposed on the travel path 92.
  • the groove forming device 28 as described above forms the multiple cut grooves G in the paper material P and forms the paper material P into the paper web PW. Therefore, the paper web PW is wound around the bobbin holder 12, and thereby a web roll WR 2 of the paper web PW is formed.
  • Such a web roll WR 2 is mounted on the paper tube manufacturing machine of FIG. 1 and used to manufacture the paper tube PT. In this case, needless to say, the groove forming device 28 has been removed from the paper tube manufacturing machine.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Making Paper Articles (AREA)
  • Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)
  • Replacement Of Web Rolls (AREA)

Claims (17)

  1. Machine à fabriquer des tubes de papier comprenant :
    un chemin de transfert (14D) pour guider le transfert d'une bande de papier, la bande de papier présentant de multiples rainures qui s'étendent le long d'une direction de transfert de la bande de papier et augmentent la flexibilité de la bande de papier ; et
    un dispositif de pliage de bande (18) disposé sur ledit trajet de transfert (14D), pour plier la bande de papier, dans laquelle
    ledit dispositif de pliage de bande (18) inclut :
    une courroie de garniture sans fin (22) pour transférer la bande de papier le long dudit chemin de transfert (14D) ;
    une section de formage de tube (60) pour former en continu la bande de papier en un tube de papier cylindrique creux par la courroie de garniture (22) tout en maintenant une surface intérieure de la bande de papier dans un état libre au cours du transfert de la bande de papier, le tube de papier ayant une partie en recouvrement où les deux bords latéraux de la bande de papier sont en recouvrement ;
    un applicateur (42) pour appliquer un adhésif sur l'un des deux bords latéraux de la bande de papier avant que la partie en recouvrement ne soit formée, afin de coller ainsi les deux bords latéraux l'un à l'autre dans la partie en recouvrement, caractérisé en ce qu'elle comprend en outre :
    un chemin de guidage (14U) disposé en amont du chemin de transfert (14D), pour guider un matériau papier en forme de bande devant être formé en tant que la bande de papier sur ledit chemin de transfert (14D) ; et
    un dispositif de formage de rainures (28) disposé sur ledit chemin de guidage (14U), pour former les rainures dans au moins l'une d'une surface intérieure et d'une surface extérieure du matériau papier.
  2. Machine à fabriquer des tubes de papier selon la revendication 1, dans laquelle les rainures sont des rainures de coupe.
  3. Machine à fabriquer des tubes de papier selon la revendication 2, dans laquelle
    ledit dispositif de formage de rainures (28) inclut un rouleau de coupe (30) et un rouleau de réception (32) qui coopèrent ensemble pour pincer le matériau papier entre eux sur ledit chemin de guidage (14U) et
    le rouleau de coupe (30) présente plusieurs lames de coupe circulaires (34) disposées dans une direction axiale de celui-ci et les lames de coupe circulaires (34) tournent avec le rouleau de coupe (30) pour former les rainures de coupe dans le matériau papier.
  4. Machine à fabriquer des tubes de papier selon la revendication 3, dans laquelle la lame de coupe circulaire (34) présente un angle de coupe de 14 à 30°.
  5. Machine à fabriquer des tubes de papier selon la revendication 3, dans laquelle ledit dispositif de formage de rainures (28) inclut en outre une source d'entraînement (30M) pour faire tourner le rouleau de coupe (30) de manière à rendre une vitesse circonférentielle de la lame de coupe circulaire (34) égale à une vitesse d'alimentation du matériau papier.
  6. Machine à fabriquer des tubes de papier selon la revendication 1 ou 2, dans laquelle ledit dispositif de pliage de bande (18) inclut en outre un rouleau presseur (56) disposé en amont de ladite section de formage de tube (60), pour presser la bande de papier contre la courroie de garniture (22).
  7. Machine à fabriquer des tubes de papier selon la revendication 6, dans laquelle ledit dispositif de pliage de bande (18) inclut en outre une source d'entraînement (56M) pour faire tourner le rouleau presseur (56) de manière à rendre une vitesse circonférentielle du rouleau presseur (56) égale à la vitesse de transfert de la bande de papier.
  8. Machine à fabriquer des tubes de papier selon la revendication 6 ou 7, dans laquelle
    ledit dispositif de pliage de bande (18) inclut en outre :
    un lit de formage (20) s'étendant dans la direction de transfert de la bande de papier ; et
    une rainure de formage (54) formée dans le lit de formage (20), pour guider le transfert de la bande de papier et de la courroie de garniture (22) et former la bande de papier en forme de U par la courroie de garniture (22) avant que la bande de papier et la courroie de garniture (22) ne passent par ladite section de formage de tube (60), et
    le rouleau presseur (56) est disposé dans la rainure de formage (54) et presse la bande de papier formée en U par la courroie de garniture (22) contre un fond de la rainure de formage (54).
  9. Machine à fabriquer des tubes de papier selon la revendication 1 ou 2, dans laquelle ledit dispositif de pliage de bande (18) inclut en outre un guide de formage préalable (66) disposé en amont de ladite section de formage de tube (60), pour former préalablement les deux bords latéraux de la bande de papier en forme d'arc.
  10. Machine à fabriquer des tubes de papier selon la revendication 1 ou 2, dans laquelle
    ledit dispositif de pliage de papier inclut en outre un sécheur (68) disposé en aval de ladite section de formage de tube (60), pour sécher la partie en recouvrement du tube de papier, et
    le sécheur (68) inclut : un élément chauffant (70) ; une nervure chauffante (72) formée d'un seul tenant dans l'élément chauffant (70), pour presser la partie en recouvrement du tube de papier tout en étant en contact glissant avec la partie en recouvrement ; et une paire de guides de régulation (74) pour presser les deux surfaces latérales du tube de papier par la courroie de garniture (22) pendant le contact glissant avec les deux surfaces latérales lors du séchage de la partie en recouvrement.
  11. Machine à fabriquer des tubes de papier selon la revendication 1 ou 2, dans laquelle la bande de papier a un poids de base de 100 à 300 g/m2, une épaisseur de 150 à 500 µm et une densité de 0,5 g/cm3 ou plus, et le tube de papier a un diamètre de 5 à 8 mm.
  12. Machine à fabriquer des tubes de papier selon la revendication 1 ou 2, dans laquelle la rainure de coupe a une profondeur de 60 à 90 % de l'épaisseur de la bande de papier et l'intervalle de rainures de coupe adjacentes est de 2 mm ou moins.
  13. Procédé de fabrication de tubes de papier comprenant les étapes consistant à :
    utiliser un matériau papier en forme de bande et une bande de papier, caractérisé en ce que la bande de papier présente de multiples rainures formées dans le matériau papier pour s'étendre dans une direction longitudinale du matériau papier, la rainure augmentant la flexibilité du matériau papier ;
    au cours du transfert de la bande de papier le long d'un chemin de transfert (14D), former en continu la bande de papier par une courroie de garniture (22) en un tube de papier cylindrique creux ayant une partie en recouvrement où les deux bords latéraux de la bande de papier sont en recouvrement, tout en maintenant une surface intérieure de la bande de papier dans un état libre ; et
    appliquer un adhésif sur l'un des deux bords latéraux de la bande de papier avant que la partie en recouvrement ne soit formée, afin de coller ainsi les deux bords latéraux formant la partie en recouvrement l'un à l'autre.
  14. Procédé de fabrication de tubes de papier selon la revendication 13, dans lequel les rainures sont des rainures de coupe.
  15. Procédé de fabrication de tubes de papier selon la revendication 14, dans lequel les rainures de coupe sont formées dans le matériau papier au cours du guidage du matériau papier vers le chemin de transfert (14D).
  16. Procédé de fabrication de tubes de papier selon l'une quelconque des revendications 13 à 15, dans lequel la bande de papier est pressée contre la courroie de garniture (22) avant que les deux bords latéraux de la bande de papier ne soient pliés séquentiellement en forme d'arc.
  17. Tube de papier comprenant une pluralité de rainures de coupe (G) en forme de V dans une surface du matériau papier (P), dans lequel les rainures de coupe (G) ont un angle d'ouverture (P) correspondant à un angle de coupe (α), dans lequel la pluralité de rainures de coupe (G) s'étendent continuellement dans la direction longitudinale du matériau papier (P) et sont formées dans la surface intérieure du matériau papier (P), et dans lequel la pluralité de rainures de coupe (G) sont déformées de telle sorte que les deux surfaces intérieures opposées de la pluralité de rainures de coupe (G) se rapprochent ou entrent en contact l'une avec l'autre lorsque le tube de papier est formé à partir d'une bande de papier (PW).
EP12887644.8A 2012-10-31 2012-10-31 Machine à fabriquer des tubes de papier, procédé de fabrication de ces derniers et tube de papier fabriqué par ledit procédé de fabrication Active EP2845499B1 (fr)

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PCT/JP2012/078178 WO2014068703A1 (fr) 2012-10-31 2012-10-31 Machine à fabriquer des tubes de papier, procédé de fabrication de ces derniers et tube de papier fabriqué par ledit procédé de fabrication

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EP2845499B1 true EP2845499B1 (fr) 2019-10-16

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JP (1) JP5921008B2 (fr)
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UA (1) UA110914C2 (fr)
WO (1) WO2014068703A1 (fr)

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CN104411190B (zh) 2016-10-12
EP2845499A4 (fr) 2016-01-20
JPWO2014068703A1 (ja) 2016-09-08
RU2015120594A (ru) 2016-12-20
JP5921008B2 (ja) 2016-05-24
UA110914C2 (uk) 2016-02-25
EP2845499A1 (fr) 2015-03-11
RU2611276C2 (ru) 2017-02-21
WO2014068703A1 (fr) 2014-05-08
CN104411190A (zh) 2015-03-11

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