JP2019531098A - Tobacco filter, manufacturing apparatus and manufacturing method thereof - Google Patents

Abstract

In order to improve productivity and quality, a wrapping paper supply unit for continuously supplying the overlapping wrapping paper in the longitudinal direction; a hollow in which the supplied overlapping wrapping paper is pressure-transferred and both ends in the width direction of the overlapping wrapping paper are connected to each other Forming rolls, which are formed of pairs that are arranged opposite to each other in the vertical direction so that the base paper tube of the mold is continuously formed; Provided is a cigarette filter manufacturing apparatus including a cutting section for cutting a base paper tube formed at a predetermined interval. [Selection] Figure 1

Description

  The present invention relates to a tobacco filter, a manufacturing apparatus and a manufacturing method thereof, and more particularly to a tobacco filter with improved productivity and quality, a manufacturing apparatus and a manufacturing method thereof.

  In general, cigarettes are cigarette paper wrapped around cigarettes such as tobacco leaves, inhaling cigarette paper and cigarettes, and inhaling smoke, reducing harmful components in the smoke and improving the taste of the smoke A filter is provided at the suction end.

  More specifically, cigarette paper is a paper that wraps a cigarette part, and is made of flax or wood pulp, and the suction end means the rear part of the cigarette wrapped with cigarette paper. Here, there are various types of filters, such as acetate filters formed by agglomerating acetate tow, hollow filters with hollows formed inside acetate filters, capsule filters with odor capsules inside, etc. Of these, a plurality of them may be used in the longitudinal direction.

  However, since the conventional filter is in direct contact with the end of the cigarette, there is a problem that the filter is heated by the heat generated during the burning of the cigarette. As a result, unpleasant odor / taste harmful smoke is generated from the filter, and harmful substances are generated from the filter for purifying harmful components, thereby damaging the health of smokers.

  In order to solve the above problems, it is an object of the present invention to provide a tobacco filter with improved productivity and quality, a manufacturing apparatus and a manufacturing method thereof.

  In order to solve the above-described problems, the present invention provides a wrapping paper supply unit that continuously supplies superimposed wrapping paper in the longitudinal direction; the supplied superimposed wrapping paper is pressurized and transferred, and both ends of the overlapping wrapping paper in the width direction are connected to each other. Forming rolls that are formed in pairs arranged opposite to each other in the vertical direction so that the formed base paper tubes are continuously formed, and form the overlapping wrapping paper in a round shape by the profiles in the width direction of the surfaces facing each other; And a cigarette filter manufacturing apparatus including a cutting portion for cutting the formed base paper tube at a predetermined interval.

  By the above solution, the present invention provides the following effects.

  First, by forming the overlapping wrapping paper continuously supplied in the longitudinal direction into a round shape so that both ends in the width direction are connected, the tubular base paper tube can be moved in the longitudinal direction without interruption of paper feeding. It can be manufactured continuously. Accordingly, it is possible to provide a hollow paper tube filter that minimizes the transfer of combustion heat of the cigarette portion through the base paper tube cut at a predetermined interval and blocks the generation of harmful substances due to heating of the acetate filter.

  Secondly, the superimposed wrapping paper passes through the forming rolls in multiple stages and is formed in order from the flat state to the form of a circular tube due to the gradual change of the pressing angle, so that the hardness of each part of the circumference is kept uniform. Roundness is improved. Thus, continuous feeding and molding are possible, but breakage due to a sudden shape change is prevented, so that the production delay and defective rate of the filter are minimized, and the productivity and quality of the product are improved.

  Thirdly, since both ends of each wrapping paper are connected by overlapping coupling between the steps by the coupling margin part, not only the sealing and coupling safety to the joint of the paper tube are improved, but also between the overlapping wrapping papers. The difference in weighing improves the hardness and roundness of the paper tube.

  Fourthly, unlike the case where a plurality of joints are formed on the cut surface of the paper tube manufactured by the conventional spiral winding method, the base paper tube has a margin portion on both ends in the width direction of the overlapping wrapping paper. Are manufactured by being connected to each other. The base paper tube is formed with one joint on the cut surface, and the joint part is firmly joined by the overlap between the steps, so that high hardness is maintained even when subdividing into lengths applicable to tobacco. Can do.

The side view which shows the manufacturing apparatus of the filter for tobacco by one Example of this invention. The front view which shows the alignment coupling | bond part in the manufacturing apparatus of the filter for tobacco by one Example of this invention. The top view which shows a forming roll in the manufacturing apparatus of the filter for tobacco by one Example of this invention. Sectional drawing which shows a superimposed wrapping paper in the manufacturing apparatus of the filter for tobacco by one Example of this invention. FIG. 4 is an exemplary diagram illustrating a process of forming a superimposed wrapping paper in a cigarette filter manufacturing apparatus according to an embodiment of the present invention. Sectional drawing which shows a base paper tube in the manufacturing apparatus of the filter for tobacco by one Example of this invention. The flowchart which shows the manufacturing method of the filter for tobacco of one Example of this invention. Sectional drawing which shows the tobacco with which the filter for tobacco of one Example of this invention was applied. It is sectional drawing which shows the VW cross section of FIG.

  Hereinafter, a cigarette filter according to a preferred embodiment of the present invention, a manufacturing apparatus and a manufacturing method thereof will be described in detail with reference to the accompanying drawings.

  FIG. 1 is a side view illustrating an apparatus for manufacturing a tobacco filter according to an embodiment of the present invention, and FIG. 2 is a front view illustrating an alignment coupling portion in the apparatus for manufacturing a tobacco filter according to an embodiment of the present invention. FIG. 3 is a plan view showing a forming roll in a cigarette filter manufacturing apparatus according to an embodiment of the present invention, and FIG. 4 is a cross-sectional view showing a superimposed wrapping paper in a cigarette filter manufacturing apparatus according to an embodiment of the present invention. FIG. 5 is an exemplary view showing a process of forming a wrapping paper in a cigarette filter manufacturing apparatus according to an embodiment of the present invention, and FIG. 6 is a base paper tube in a cigarette filter manufacturing apparatus according to an embodiment of the present invention. FIG.

  As shown in FIGS. 1 to 6, the tobacco filter manufacturing apparatus 100 according to a preferred embodiment of the present invention includes a wrapping paper supply unit 10, a forming roll 20, and a cutting unit 40.

  Here, the wrapping paper supply unit 10 is provided at the front end portion of the manufacturing apparatus 100 so that the superimposed wrapping paper d is continuously supplied in the longitudinal direction, and a pair of winding rolls 10a and 10b, a gluing nozzle 10c, and an alignment coupling unit 10d. Formed. More specifically, the superimposed wrapping paper d has a width corresponding to a predetermined reference width depending on the diameter of the tobacco filter, and means a continuous wrapping paper in the longitudinal direction. The reference width is set to the length of the outer edge of the tobacco filter. The

  The overlapping wrapping paper d may be provided as a single wrapping paper, and one or more wrapping papers may be provided by being superimposed and coupled in the thickness direction. In this embodiment, as an example, a case where a pair of wrapping papers are superposed and provided will be described.

  Specifically, the first roll a and the second roll b are wound around the take-up rolls 10a and 10b in the longitudinal direction, and the take-up rolls 10a and 10b It is preferable that they are arranged at the rear. Here, it is preferable that the first wrapping paper a and the second wrapping paper b are provided in a form continuous in the longitudinal direction and are made of paper materials having different weighings. Weighing means the weight per unit area of paper.

  At this time, the first wrapping paper a and the second wrapping paper b are formed to have a width corresponding to the reference width, and the second wrapping paper b surrounding the outer periphery of the first wrapping paper a has a predetermined margin when being formed into a circumferential shape. It is preferable to be provided so as to further have a width. That is, it is preferable that the second wrapping paper b is provided with a width equal to or less than the reference width, and the first wrapping paper a is less than the reference width and has a width less than the second wrapping paper b.

  The first wrapping paper a and the second wrapping paper b pulled out from the winding rolls 10a and 10b are transferred to the aligning and coupling portion 10d side along the plurality of guide rollers 10f. That is, the guide roller 10f is formed in multiple stages along a path from the first winding roll 10a to the front of the alignment coupling part 10d, and is multistage along the path from the second winding roll 10b to the front of the alignment coupling part 10d. Formed.

  At this time, the gluing nozzle 10c is disposed at the upper front end of the second winding roll 10b on which the second wrapping paper b is wound, and the second wrapping paper pulled out from the second winding roll 10b via the gluing nozzle 10c. An adhesive is applied to the upper surface of b.

  On the other hand, referring to FIG. 1 and FIG. 2, the aligning and coupling part 10d is composed of a pair of aligning rollers 11 and 12 arranged facing each other in the vertical direction.

  More specifically, the first wrapping paper a and the second wrapping paper b are drawn out and transferred in the longitudinal direction along the guide roller 10f, and the alignment rollers 11, 12 in a state where the first wrapping paper a is superimposed on the upper surface of the second wrapping paper b. Is sandwiched between.

  At this time, as the alignment rollers 11 and 12 rotate, the first and second webs a and b can be continuously drawn out from the take-up rolls 10 a and 10 b and transferred to the rear of the web supply unit 10.

  Further, the first and second wrapping papers a and b that have passed through the alignment rollers 11 and 12 are pressed and joined in the vertical direction. Here, the alignment coupling part 10d includes a lower alignment roller 11 having an alignment groove 11a formed along the outer periphery thereof, and an upper alignment roller 12 that is inserted into the alignment groove 11a and rotates. preferable.

  At this time, the width of the alignment groove 11a is preferably a size including a coupling interval set in advance from the width of the first wrapping paper a or the second wrapping paper b to less than the width of the first wrapping paper a and the second wrapping paper b.

  2 to 4, one end of the first wrapping paper a is arranged in close contact with one end of the alignment groove 11 a in the width direction, and the other end of the alignment groove 11 a in the width direction. It arrange | positions so that the other end part of the width direction of the 2nd wrapping paper b may contact | adhere. As a result, one end of the first wrapping paper a and the second wrapping paper b in the width direction is aligned to be separated from each other so as to correspond to the coupling interval, and pressurized in the vertical direction while being aligned with each other.

  Here, it is preferable that the interval between the alignment groove 11a and the upper alignment roller 12 is provided so as to correspond to the sum of the thicknesses of the first wrapping paper a and the second wrapping paper b. Further, it is preferable that the rotation direction of the lower alignment roller 11 and the formation direction of the alignment groove 11a coincide with the longitudinal direction of each of the wrapping papers a and b or the transport direction of each of the wrapping papers a and b.

  As a result, the first wrapping paper a and the second wrapping paper b are continuously drawn out, aligned and overlapped, and the overlapping wrapping paper d is continuously formed in the longitudinal direction and supplied to the back of the wrapping paper supply unit 10. That is, the superimposed wrapping paper d means a state in which the first wrapping paper a and the second wrapping paper b are combined.

  Further, a first coupling margin d1 is formed at one end portion in the width direction of the superimposed wrapping paper d by the first wrapping paper a protruding from one end portion in the width direction of the second wrapping paper b to one side in the width direction. Further, a second coupling margin d2 is formed at the other end in the width direction of the superimposed wrapping paper d by the second wrapping paper b protruding from the other end in the width direction of the first wrapping paper a to the other side in the width direction.

  1 to 6, the forming roll 20 is disposed at the rear of the wrapping paper supply unit 10 and is opposed to the vertical direction to form a pair. Here, the forming roll 20 is preferably formed of a plurality of pairs arranged in multiple stages along the direction in which the superimposed wrapping paper d is supplied and transported, that is, the longitudinal direction of the superimposed wrapping paper d.

  More specifically, it is preferable that one molding roll 20 includes a lower molding roller 21 and an upper molding roller that are arranged to face each other in the vertical direction, and the overlapping wrapping paper d is located between the lower molding roller 21 and the upper molding roller. And pressurized and transferred along.

  Here, the lower molding roller 21 is rotated integrally with the lower alignment roller 11. That is, the pulley 23 provided on one side of the lower molding roller 21 and the pulley 13 provided on one side of the lower alignment roller 11 are connected by a tension belt or the like and rotate integrally.

  On the surface of the lower molding roller 21, a molding groove portion 21a is formed to be recessed inward in the radial direction, and the upper molding roller is inserted into the molding groove portion 21a. At this time, the upper molding roller is a member for bringing the overlapping wrapping paper d into close contact with the surface of the molding groove 21a, and is a roller member or bar member having a surface shape corresponding to the width direction profile of the surface of the molding groove 21a.

  Here, the overlapping wrapping paper d is molded in a round shape in accordance with the width direction profile of the opposing surface between the lower molding roller 21 and the upper molding roller. That is, the superimposed wrapping paper d is pressed between the lower molding roller 21 and the upper molding roller and molded so as to correspond to the surface shape of the molding groove 21a.

  At this time, the distance between the opposing surfaces between the lower molding roller 21 and the upper molding roller is preferably equal to or less than the sum of the thicknesses of the first and second webs a and b, and the overlapping web d is between the rollers. And can be molded accurately.

  In addition, the overlapping wrapping paper d that has passed through the forming roll 20 is formed in a round shape, and both ends of the overlapping wrapping paper d in the width direction are connected to each other to form a base paper tube e. That is, the base paper tube e means a state in which both end portions in the width direction of the overlapping wrapping paper d are connected to each other. At this time, the overlapping wrapping paper d is transferred in the longitudinal direction by the forming roll 20 and is formed in a round shape in the width direction, whereby the base paper tube e is continuously formed.

  Here, it is preferable that the rotation direction of the lower forming roll 21 and the forming direction of the forming groove portion 21a coincide with the longitudinal direction which is the transfer or supply direction of the superimposed wrapping paper d. Thereby, unlike the conventional spiral winding method or the longitudinal rotation type paper tube manufacturing method, the base paper tube e can be continuously manufactured in the longitudinal direction without interruption of the supplied overlapping wrapping paper d. As a result, product productivity is significantly improved.

  On the other hand, referring to FIG. 3 to FIG. 5, the forming rolls 20 are preferably arranged in multiple stages along the transfer direction of the overlapping wrapping paper d.

  In other words, one molding roll 20 is composed of a pair opposed in the vertical direction, and a plurality of pairs of molding rolls 20a, 20b, 20c, 20d, 20e, 20f, and 20g are arranged in multiple stages along the transfer direction of the overlapping wrapping paper d. The

  At this time, each of the forming rolls 20 arranged in multiple stages has a gradient rate of the profile in the width direction with respect to the surface, that is, the surface of each forming groove 21a, 21b, 21c, 21d, 21e, 21f, 21g. It is preferable to increase as going backward.

  Here, the gradient rate is a concept similar to the curvature, and it can be understood that the gradient rate is lower as it is closer to the plane and the gradient rate is higher as it is closer to the circumference.

  More specifically, the molding groove portion 21a of the front molding roll 20a adjacent to the alignment coupling portion 10d is formed in a form close to a plane (low gradient rate). Further, a molding groove 21g having a profile in the width direction close to a circle (high gradient rate) is formed on the molding roll 20g at a position far from the alignment coupling portion 10d.

  More specifically, the forming groove portion 21a of the first forming roll 20a on the foremost side is formed in a form in which both end portions in the width direction are inclined upward at a predetermined angle, and the superimposed wrapping paper d that has passed through the first forming roll 20a. Is formed in a form in which both end portions in the width direction are inclined upward.

  The forming groove portion 21b of the second forming roll 20b behind the first forming roll 20a is formed in a form in which both end portions in the width direction are inclined upward, and the overlapping wrapping paper d that has passed through the second forming roll 20b is in the width direction. The two end portions are molded in a form inclined toward the upper side. Further, the molding groove 21c of the third molding roll 20c behind the second molding roll 20b is formed in a form in which both end portions in the width direction are inclined upward and the central portion is bent downward at a predetermined angle. The

  The molding groove 21d of the fourth molding roll 20d behind the third molding roll 20c is formed in a form in which both end portions in the width direction are inclined upward and the center portion is recessed in a round shape.

  Moreover, the depression depth of the center portion increases in order as it goes to the fifth forming roll 20e, the sixth forming roll 20f, and the seventh forming roll 20g, and the width between both end portions becomes sequentially narrower. The seventh molding roll 20g is formed with a molding groove 21g having a profile in the width direction close to the circumference.

  At this time, the overlapping wrapping paper d passes through each forming roll, and each part in the width direction such as both end portions and the central portion is sequentially formed into a round shape, and is gradually formed into a circumferential shape from a flat form.

  In this way, the superimposed wrapping paper d passes through the multi-stage forming roll 20 and is formed from a flat shape into a circular tube shape by a gradual change in the pressing angle, so that the hardness is uniform in each part of the circumference. And can be accurately molded with high roundness.

  Furthermore, since a buffer area is formed by a plurality of molding rolls 20 between the overlapping wrapping paper d supplied in a flat shape and a base paper tube e molded into a circumferential shape, continuous paper feeding and molding are possible. However, it is possible to prevent tearing due to sudden shape change. This minimizes the production delay due to the tear of the overlapping wrapping paper d and the defective rate due to the low roundness, thereby improving the productivity and quality of the product.

  In addition, since the superimposed web d is formed by superposition of a pair of webs a and b having different weighs, the hardness of the base paper tube e is increased and the trueness of the base paper tube e is increased due to the hardness difference between the inner and outer webs. Circularity is further improved. In other words, the low-hardness second wrapping paper b is superimposed on the outer periphery of the high-hardness first wrapping paper a, so that the second wrapping paper b is added to the outside in the radial direction due to the hardness difference between the two wrapping papers a and b. It is possible to manufacture a high-quality base paper tube e whose outer periphery and inner periphery are flattened by being pressed.

  On the other hand, when the overlapping wrapping paper d passes through the forming roll 20 and is formed into a round shape, the coupling margins d1 and d2 provided at both ends in the width direction of the overlapping wrapping paper d are overlapped and coupled to each other to form the base paper tube e. Form.

  In other words, the second coupling margin part d2 projecting with a step at the other end of the superimposed wrapping paper d is superimposed on the upper surface of the first coupling margin part d1 projecting with a step at one end of the superimposed wrapping paper d. The both ends of the overlapping wrapping paper d in the width direction can be connected to each other. By such overlapping coupling between the steps, both ends of the base paper tube e are firmly coupled, and the hermeticity of the joint portion of the base paper tube e is improved.

  The cutting unit 40 is disposed behind the molding roll 20 and cuts the formed base paper tube e at a predetermined interval, whereby the base paper tube e is cut to produce a paper tube filter.

  At this time, the paper tube filter is disposed between the cigarette part and the base filter made of acetate material, and can reduce heat transfer toward the base filter when the cigarette part burns. This has the effect of minimizing generation.

  Here, the interval at which the base paper tube e is cut is preferably a size applicable to one cigarette, but may be set to be different according to the requirements of the individual tobacco manufacturer. At this time, since the base paper tube e is formed by connecting both ends in the width direction of the overlapping paper d, one joint is formed on the cut surface of the base paper tube e. That is, unlike the conventional method in which a plurality of joints are formed in an inclined shape on the cut surface of the paper tube manufactured by the spiral winding method, one joint is formed on the cut surface of the paper tube filter. .

  Furthermore, since the joint portion of the paper tube filter is firmly coupled by the overlap between the steps by the coupling margin portions d1 and d2, it is possible to maintain high hardness even when being divided into lengths applicable to tobacco. it can.

  Further, a wrapping paper stack for supplying a third wrapping paper c coated with an adhesive so as to cover the coupling margins d1 and d2 between the forming roll 20 and the cutting part 40 to the outer periphery of the base paper tube e in the longitudinal direction. It is preferable to have the part 50.

  More specifically, the wrapping paper stacking unit 50 includes a third winding roll 50a around which the third winding paper c is wound, and a gluing nozzle 50b that applies an adhesive to one surface of the third winding paper c drawn from the third winding roll 50a. , And an entry unit 50c that supplies the third wrapping paper c in close contact with the outer periphery of the base paper tube e.

  At this time, the third wrapping paper c has a predetermined reference width corresponding to the diameter of the paper tube filter, is made of a paper material continuous in the longitudinal direction, and is wound around the third winding roll 50a in the longitudinal direction. That is, the third wrapping paper c is further formed with a predetermined margin width from the width of the first wrapping paper a or the second wrapping paper b, and is joined so as to surround the outer periphery of the base paper tube e.

  At this time, a hollow molding hole is formed inside the entry unit 50c. That is, when the base paper tube e discharged from the molding roll 20 is inserted into the molding roll in a state where the third wrapping paper c is arranged along the inner periphery of the molding hole, along the outer periphery of the base paper tube e. The third wrapping paper c is stacked and transferred.

  Here, it is preferable that the third wrapping paper c is made of a paper material having a lower weight than the first wrapping paper a and the second wrapping paper b. In this way, the third wrapping paper c is stacked on the outer periphery of the base paper tube e, whereby the hardness of the base paper tube e is increased and the joint portion between the coupling margins d1 and d2 is more stably sealed.

  At this time, it is more preferable that the finishing portion 30 is provided behind the entry unit 50c. More specifically, the finishing section 30 preferably includes a forming frame 30a having an inner diameter corresponding to the outer diameter of the paper tube filter, and a heating chamber 30b for heating the base paper tube e so that the adhesive is cured. That is, the base paper tube e discharged from the forming roll 20 is inserted into the forming frame 30a in a state where the third wrapping paper c is overlaid. At this time, the base paper tubes e are in close contact with the inner periphery of the forming frame 30a and are aligned in the form of an accurate circular tube.

  The heating chamber 30b has an inner diameter corresponding to the outer diameter of the base paper tube e, like the forming frame 30a, and is heated to a predetermined temperature. Here, the adhesive is thermosetting, and the shape of the base paper tube e that has flowed into the heating chamber 30b is fixed by curing of the adhesive in a state of being aligned in a circular tube shape.

  At this time, the base paper tube e is transferred to the cutting unit 40 in a state where the finishing process is performed by the finishing unit 30 and is cut.

  On the other hand, a filter discharge unit 60 is preferably provided behind the cutting unit 40. Here, the filter discharge portion 60 is formed to include a pickup drum 60a, a reject air gun 60b, a vision camera 60c, a determination device 60d, and a storage portion 60e.

  More specifically, a plurality of pickup grooves for picking up the cut paper tube filters are formed on the outer periphery of the pickup drum 60a, and the paper tube filters cut by the pickup grooves are picked up one by one and rotated and transferred. The

  At this time, a vision camera 60c that captures a cross-sectional image of the paper tube filter is provided on one side of the pickup groove, and the cross-sectional image captured by the vision camera 60c is transmitted to the determination device 60d. Here, the determination device 60d can determine the presence / absence of a defect by measuring the position of the hollow portion of the paper tube filter from the captured cross-sectional image.

  Further, the reject air gun 60b is operated according to the discrimination result of the discriminating device 60d, and the defective paper tube filter is discharged outside the pickup groove, and the non-defective paper tube filter that has not been discharged by the reject air gun 60b is collected in the housing portion 60e.

  This makes it possible to automatically determine whether or not the paper tube filter manufactured as described above is non-defective and automatically remove the defective paper tube filter, thereby minimizing further inspection processes or manpower consumption and improving product productivity. Can be remarkably improved.

  On the other hand, FIG. 7 is a flowchart showing a method for manufacturing a tobacco filter according to an embodiment of the present invention.

  As shown in FIG. 7, the method for manufacturing a tobacco filter includes the following processes.

  First, referring to FIG. 1 to FIG. 7, the first wrapping paper a and the second wrapping paper b are pulled out in the longitudinal direction from the winding rolls 10a and 10b, and an adhesive is applied to one of the opposing surfaces of the wrapping papers a and b. It is applied (s10).

  That is, when the first wrapping paper a and the second wrapping paper b are arranged facing each other in the vertical direction, and each wrapping paper a is placed facing each other, the lower surface of the first wrapping paper a or the upper surface of the second wrapping paper b. It is preferable that an adhesive is applied to one of the surfaces.

  At this time, it is preferable that the first wrapping paper a and the second wrapping paper b have different weighs in order to increase the hardness of the superimposed wrapping paper d, and the weighed first wrapping paper a may be higher than that of the second wrapping paper b. preferable.

  Moreover, it is preferable that the first wrapping paper a and the second wrapping paper b have a predetermined margin width so that one surrounds the other, and each has a width less than a predetermined reference width depending on the diameter of the paper tube filter. That is, it is preferable that the second wrapping paper b has a width equal to or less than the reference width, and the first wrapping paper a has a width less than the reference width but less than the second wrapping paper b.

  The first wrapping paper “a” and the second wrapping paper “b” are superposed and joined to form a superimposing wrapping paper “d” continuously in the longitudinal direction (s20). More specifically, the first wrapping paper a and the second wrapping paper b are aligned with one end in the width direction spaced apart from each other at a predetermined coupling interval. Further, when pressure is applied in the vertical direction so that the opposed surfaces of the aligned first and second webs a and b are in close contact with each other, the first and second webs a and b are combined to form a superimposed web d. .

  At this time, coupling margin portions d1 and d2 that are not superimposed are formed at both ends of the overlapping wrapping paper d so as to correspond to the coupling interval.

  Also, the overlapping wrapping paper d is formed in the longitudinal direction by the forming rolls 20 arranged in multi-stage so that the gradient rate of the surface width direction profile increases in order along the transfer direction of the overlapping wrapping paper. Pressurized and transferred, and sequentially molded in a round shape (s30). Also, the base margins d1 and d2 on both ends in the width direction of the overlapping wrapping paper d can be connected to each other to form the base paper tube e continuously.

  In this way, the overlapping wrapping paper d passes through the forming roll 20 formed in multiple stages, and is formed from a flat form into a circular pipe form by a gradual change in the pressing angle, so the hardness of each part of the circumference is Maintained uniformly, the base paper tube e is accurately molded so as to have a high roundness.

  Furthermore, since a buffer area is formed by a plurality of molding rolls 20 between the overlapping wrapping paper d supplied in a flat shape and the base paper tube e molded into a circumferential shape, without being broken by a sudden shape change, The supply and molding process of the superimposed wrapping paper d is continuously performed, and the productivity delay and the defective rate due to the low roundness are minimized by improving the productivity and quality of the product.

  At this time, if the coupling margin portions d1 and d2 at both ends of the overlapping wrapping paper are overlapped and coupled to each other, the third wrapping paper c can be overlapped along the outer surface of the coupled coupling margin portions d1 and d2.

  More specifically, the third wrapping paper c preferably has a lower weight than the second wrapping paper b. At this time, the third wrapping paper c is selected to have a predetermined reference width according to the diameter of the paper tube filter, the second wrapping paper b has a width less than the third wrapping paper c, and the first wrapping paper a is the second wrapping paper b. Preferably it has a width of less than.

  As described above, since the superimposed wrapping paper d is formed by superimposing the pair of wrapping papers a and b having different weighings, the hardness of the base paper tube e is increased, and the base paper tube e is caused by the hardness difference between the inner and outer wrapping papers. The roundness of the is further improved.

  Further, both end portions of the base paper tube e are connected by overlapping the pair of coupling margin portions d1 and d2, and a connecting portion between the coupling margin portions d1 and d2 is superimposed by the third wrapping paper. Thereby, the hardness of the base paper tube e is increased, and the sealing performance from the hollow inside of the base paper tube e to the radial direction is remarkably improved.

  Finally, the base paper tube e is finished by the finishing unit 30, and the finished base paper tube e is cut at a predetermined interval to produce a paper tube filter (s40).

  Unlike the case where a plurality of joints are formed on the cut surface of the paper tube manufactured by the conventional spiral winding method, the base paper manufactured by connecting both ends in the width direction of the overlapping wrapping paper d. The pipe e is formed with one joint on the cut surface, and the joint part is firmly joined by the overlap between the steps due to the joining margins d1 and d2, so it is high even if it is subdivided into lengths applicable to tobacco. Hardness can be maintained.

  On the other hand, FIG. 8 is a sectional view showing a tobacco to which a tobacco filter according to an embodiment of the present invention is applied, and FIG. 9 is a sectional view showing a VW section of FIG.

  As shown in FIGS. 8 and 9, the cigarette filter 200 includes a paper tube filter 220, a base filter 230, and a tip paper 240.

  Here, the paper tube filter 220 preferably includes a first wrapping paper portion 220a and a second wrapping paper portion 220b. More specifically, the first wrapping portion 220a means the inner peripheral side of the paper tube filter 220 formed by the first wrapping paper a, and the second wrapping portion 220b is the outer periphery of the paper tube filter 220 formed by the second wrapping paper b. It can be understood as meaning the side.

  On the other hand, the first wrapping paper portion 220a can be formed by connecting both end portions in the width direction of the first wrapping paper a formed in a round shape so that the hollow 221 is formed therein. At this time, the first wrapping paper a is preferably made of a first weighed paper material.

  The second wrapping paper portion 220b is formed so as to surround the outer periphery of the first wrapping paper portion 220a by a second wrapping paper portion b made of a paper material of a second weighing different from the first weighing. Here, the second weighing is preferably less than the first weighing.

  As a result, the second wrapping paper portion 220b having a relatively low hardness is overlapped and coupled to the outer periphery of the first wrapping paper portion 220a having a relatively high hardness, and the circularity is caused by the hardness difference between the wrapping paper portions 220a and 220b. The circumferential form is kept uniform and the overall hardness of the paper tube filter 220 is improved.

  At this time, the second wrapping paper portion 220b is formed by overlapping the second wrapping paper b so as to surround the outer periphery of the first wrapping paper portion 220a, and connecting both ends in the width direction of the second wrapping paper b to each other. The Here, both end portions of the second wrapping paper portion 220b in the circumferential direction are connected to each other at a predetermined distance from a connecting portion between both ends of the first wrapping paper portion 220a in the peripheral direction.

  More specifically, the first wrapping paper a and the second wrapping paper b are superposed and coupled in a state where the respective ends in the width direction are aligned so as to be separated from each other by a predetermined coupling interval.

  That is, the first coupling margin portion d1 corresponding to one end portion in the width direction of the first wrapping paper a protruding from one end portion in the width direction of the second wrapping paper b and the other end portion in the width direction of the first wrapping paper a The second coupling margin portion d2 corresponding to the other end portion in the width direction of the second wrapping paper b protruding from the other in the width direction can be coupled to overlap each other. Thereby, the connection part d3 between the both ends of the circumference direction of the first wrapping paper part 220a and the connection part d4 between the both ends of the circumference direction of the second wrapping paper part 220b can be displaced from each other. The sealing performance of the paper tube filter 220 from the hollow 221 toward the radial direction can be remarkably improved.

  Furthermore, unlike the conventional method of winding a wrapping paper a plurality of times in a spiral shape, a paper tube having sufficient hardness can be produced simply by winding double wrapping papers with different weights in the width direction and connecting both ends. can do.

  Furthermore, one joint is formed at the front end and rear end cut surfaces of the manufactured paper tube, and the joint portion forms a step by the joint margins d1 and d2, so that it can be applied to tobacco. The paper tube filter 220 divided into small lengths can maintain high hardness.

  Of course, the third wrapping paper portion may be further formed on the outer periphery of the paper tube filter 220 by overlapping the third wrapping paper.

  Further, the paper tube filter 220 is coupled to the rear end portion of the cigarette portion 210 filled with tobacco. The base filter 230 is connected to the rear end of the paper tube filter 220 so as to be spaced apart from the cigarette unit 210 through the hollow 221 of the paper tube filter 220. Here, the base filter 230 includes various acetate filters such as an acetate filter formed by agglomerating acetate tow, a hollow filter in which a hollow is formed inside the acetate filter, and a capsule filter including a scent capsule. There are types, and it can be understood as a concept including a composite filter in which a plurality of these are connected in the longitudinal direction.

  The chip paper 240 surrounds the outer periphery of the paper tube filter 220 and the base filter 230 and is fixed to the rear end portion of the cigarette unit 210. At this time, the chip paper 240 is made of a thin paper material in which a plurality of pores are formed, and is joined so as to integrally surround the outer ends of the cigarette part 210, the paper tube filter 220, and the base filter 230.

  Since the hollow paper tube filter 220 is arranged between the cigarette part 210 and the base filter 230 in this way, the combustion heat of the cigarette part 210 is blocked from being directly transmitted to the base filter 230, and the base Generation of harmful substances due to heating and combustion of the filter 230 can be blocked.

  Further, the present invention is not limited to the above-described embodiments, and various configurations can be made within the scope of the present invention, and any improvements may be made to all or some of the components. Are also within the scope of the present invention.

  The present invention can be applied to the tobacco manufacturing industry by providing a tobacco filter and an apparatus and method for manufacturing the same.

Claims (9)

A wrapping paper supply unit for continuously supplying the overlapping wrapping paper in the longitudinal direction;
The supplied superimposed wrapping paper is pressurized and transferred, and is arranged facing the vertical direction so that a hollow base paper tube in which both ends in the width direction of the superimposed wrapping paper are connected to each other is continuously formed. A forming roll for forming the overlapping wrapping paper in a round shape according to the width direction profiles of the surfaces facing each other;
A cigarette filter manufacturing apparatus, comprising: a cutting portion that cuts the formed base paper tube at a predetermined interval. The forming rolls are arranged in multiple stages along the transfer direction of the superimposed wrapping paper, and are provided such that the profile gradient rate in the width direction with respect to each surface arranged in multiple stages increases toward the rear in the transfer direction of the superimposed wrapping paper. Item 2. An apparatus for producing a tobacco filter according to Item 1. The wrapping paper supply unit
A pair of winding rolls around which each of the first and second wrapping papers is wound;
A gluing nozzle for applying an adhesive to the wrapping paper drawn from each winding roll;
Alignment and coupling portions for superimposing and coupling the first and second wrapping papers, in which one end in the width direction is separated at a predetermined coupling interval so that coupling margins are formed at both ends of the superimposed wrapping paper The apparatus for producing a tobacco filter according to claim 1. Further, a wrapping paper stacking section is provided between the forming roll and the first cutting section to supply a third wrapping paper coated with an adhesive in the longitudinal direction to the outer periphery of the base paper tube so as to cover the coupling margin. Item 4. A tobacco filter manufacturing apparatus according to Item 3. A first stage in which the first and second wrapping papers are drawn out so as to face each other, and an adhesive is applied to one of the opposing surfaces of the wrapping papers; A second stage in which the superimposed wrapping paper is continuously formed in the longitudinal direction;
The overlapping wrapping paper is pressed in the longitudinal direction by molding rolls arranged in multiple stages so that the profile gradient rate in the width direction of the surface increases in order along the transfer direction of the overlapping wrapping paper. A third stage in which the base paper tube is continuously formed by connecting the both ends in the width direction to each other by being transferred and sequentially molded in a round shape;
And a fourth stage in which the base paper tube is finished and the finished base paper tube is cut at a predetermined interval to produce a hollow paper tube filter. Manufacturing method. A first wrapping portion made of a first weighed paper material, formed in a round shape so as to form a hollow inside, and having both ends connected to each other, and a first wrapping paper portion made of a second weighed paper material A hollow paper tube filter coupled to a rear end portion of the cigarette portion filled with cigarettes, and a second wrapping paper portion superposedly coupled so as to surround the outer periphery of the cigarette;
A base filter connected to a rear end portion of the paper tube filter so as to be spaced apart from the cigarette portion through a hollow of the paper tube filter;
A cigarette filter comprising: chip paper that surrounds the outer periphery of the paper tube filter and the base filter and is fixed to a rear end portion of the cigarette portion. The cigarette filter according to claim 6, wherein the first weigh and the second weigh are provided differently. The tobacco filter according to claim 7, wherein the second weighing is provided below the first weighing. The cigarettes according to claim 6, wherein both end portions of the second wrapping paper portion are connected to each other at positions spaced along the circumferential direction at a predetermined coupling interval from a connecting portion between the both end portions of the first wrapping paper portion. Filter.

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