JP4285979B2 - Manufacturing method and apparatus for manufacturing sheath-core type tobacco filter - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for manufacturing a tobacco filter, particularly a sheath-core type tobacco filter comprising a long fiber crimped tow and a core part filter material, and a manufacturing apparatus therefor.
[0002]
[Prior art]
Conventionally, various proposals have been made for cigarette filters having a composite structure composed of a plurality of filter materials. In these proposals, the purpose of constructing a filter from a plurality of filter materials is various, but the main purpose is to generally configure the flow of tobacco smoke and dilution air passing through the filter by constructing the filter from a plurality of filter materials. It is to be able to change to a flow that is impossible with a typical filter.
[0003]
As a method and apparatus for manufacturing such a filter, for example, Japanese Patent Publication No. 51-5079 discloses a flow comprising a hollow tube (core part filter material) and a flow comprising a fibrous filter material (sheath part filter material) in parallel. These three components are arranged and surrounded by the flow of fibrous filter material around the flow in the hollow tube, and the flow of porous paper around the parallel flow of tube and fibrous filter material. The filter rod is formed while the flow of the tube continuously moves, the formed filter rod is moved as a continuous flow of the three members, the fiber material is pressed around the tube, and the tube is moved continuously with it. A method of manufacturing a filter is disclosed that includes a step of frictionally engaging the filter. Also, a device that forms a moving flow of fibrous filter material and coats porous paper around the filter rod, and a tube is placed concentrically with the filter material of the filter rod in the longitudinal direction, and the filter material is applied to the surroundings An apparatus for manufacturing a cigarette filter is disclosed that includes a device that frictionally engages a tube with a compressed force.
[0004]
Japanese Patent Publication No. 59-13184 discloses a method in which a hollow fiber is passed through a hollow fiber insertion guide and positioned at the center of a filter plug.
[0005]
[Problems to be solved by the invention]
In the filter intended to change the flow of cigarette smoke (diluted air) in the filter by inserting these filter materials for the core part, the filter material for the core part must be placed in the desired shape and position. As a result, the quality of the product becomes large and the desired performance cannot be obtained, and the appearance is also impaired.
However, in the methods and apparatuses described in Patent Documents 1 and 2, when a plurality of core part filter materials are used, the plurality of core part filter materials are arranged in the filter with sufficient accuracy at a desired position. It is difficult.
[0006]
The present invention has been made to solve the above problems, and even when there are a plurality of filter materials for the core part, the filter material for the core part is arranged in the filter at a desired position with sufficient accuracy. A method for manufacturing a sheath-core filter and a manufacturing apparatus therefor are provided.
[0007]
[Patent Document 1]
Japanese Patent Publication No. 51-5079 [Patent Document 2]
Japanese Patent Publication No.59-13184 [0008]
[Means for solving the problems and effects]
A first basic configuration of the present invention is a method of manufacturing a sheath-core type tobacco filter in which a plurality of core part filter materials are inserted into an opened long fiber crimped tow, Defining the mutual arrangement of the core filter materials, and after completing this definition , focusing the mutual positional relationship of the multiple core filter materials so that the core filter material has a desired cross-sectional shape. There is provided a method for producing a sheath-core type tobacco filter, characterized in that the method comprises insertion into a long-fiber crimped tow which is maintained and focused by a guide and opened.
[0009]
In the present invention, before converging a plurality of core part filter materials, after prescribing to a predetermined arrangement relationship, this is inserted into a long fiber crimped tow that has been converged and opened. Even after the arrangement relationship is inserted into the long fiber crimped tow, the desired arrangement relationship can be maintained. As a result, not only can the cigarette smoke (diluted air) flow through the filter be effectively changed, but there is no quality difference between the cigarettes.
[0010]
Moreover, in this invention, it is desirable to apply | coat an adhesive agent to the said core part filter material before focusing of a core part filter material. By applying this adhesive, when a plurality of core part filter materials whose arrangement relations are arranged are converged, they are bonded together without changing their arrangements, so that the long fiber crimped tow is reliably maintained while maintaining the arrangement relations. Inserted into a filter rod.
[0011]
A second basic configuration of the present invention is an apparatus for manufacturing a sheath-core type tobacco filter in which a plurality of core part filter materials are inserted into an opened long-fiber crimped tow, and a plurality of core parts In order to focus while maintaining the mutual positional relationship of the plurality of core part filter materials so as to have a desired sectional shape of the core part filter material, and a position defining guide for defining mutual arrangement relationship of the filter materials An apparatus for manufacturing a sheath-core type cigarette filter.
[0012]
According to the sheath-core type tobacco filter manufacturing apparatus of the present invention having such a configuration, when a plurality of core part filter materials pass through the position defining guide, each core part filter material is arranged with a specific arrangement relationship, The core portion filter material having a desired cross-sectional shape is obtained by being introduced into the focusing guide while maintaining the positional relationship.
[0013]
In the present invention, in order to adjust the cross-sectional shape of the core part filter material during focusing, it is preferable that two or more of the position defining guides and the focusing guides are provided.
In addition, a filter member insertion guide for a core part that further includes a funnel-shaped inlet part and a cylindrical part on the downstream side of the convergence guide, and a tip on the downstream side of the cylindrical part satisfies the following formula (1). It is desirable.
[0014]
0.013 <W ÷ (ρ × L × (A−Ag)) <0.06 (1)
However, the sign in equation (1) is
W: Filling amount of long fiber crimped tow into the filter plug to be rolled up (g / rod)
L: Length of the filter plug to be rolled up (cm)
ρ: Density of long fiber crimped tow (g / cm ³ )
A: Cross-sectional area in the tongue at the tip of the core part filter material insertion guide (cm ² )
Ag: sectional area (cm ² ) of the tip of the core part filter material insertion guide
It is.
[0015]
When W ÷ (ρ × L × (A−Ag)) is 0,013 or less, the condensate of the core part filter material is relatively free to move in the cross-sectional direction, and further the long fiber crimped tow and the core part The distance traveled by the filter material converged object to the desired diameter is increased, and at the same time the degree of compression is increased, so the stringed filter material converged object is accurately placed at the desired position in the filter. It is difficult to pass the converging object of the core filter material through the tongue while maintaining the cross-sectional shape.
[0016]
On the other hand, if W ÷ (ρ × L × (A−Ag)) is 0.06 or more, the space through which the long fiber crimped tow passes in the vicinity of the tip of the core portion filter material insertion guide becomes narrow, and the long fiber Since the resistance when the crimped tow passes through the portion is remarkably increased, the long fiber crimped tow may be loosened before the air jet, making it difficult to manufacture the filter. In addition, even if the production of the filter does not become difficult, it is necessary to suppress the slackness of the long fiber crimped tow before the air jet, which may slow down the production rate of the filter.
[0017]
The present invention provides an adhesive application device for applying an adhesive to a core part filter material at a position before the core part filter is introduced into the position defining guide or between the position defining guide and the focusing guide. Furthermore, it is desirable to provide. This adhesive application device can be configured to apply an adhesive around the core part filter material via a porous body. Multiple core filters that have passed through the adhesive applicator are guided by the position-defining guides to define their positional relationship, or after passing through the position-defining guides, the adhesive is applied by the adhesive applicator and converged. When they are converged by the guide, they are adhered to each other to secure the positional relationship, and the converging object of the core part filter material maintains the desired cross-sectional shape, and the periphery thereof is covered with the long fiber crimped tow. The application amount of the adhesive can be changed by adjusting the supply rate of the adhesive supplied from the porous body.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a preferred embodiment relating to a method for producing a sheath-core type tobacco filter of the present invention will be described in more detail.
[0019]
In the present invention, in the method of manufacturing a sheath-core type tobacco filter in which a plurality of core part filter materials are inserted into the opened long fiber crimped tow, the positional relationship between the plurality of core part filter materials is defined. The core part filter material needs to be bundled so as to have a desired cross-sectional shape and inserted into the opened long fiber crimped tow.
[0020]
When focusing without specifying the positional relationship between the plurality of core part filter materials, the core part filter materials are focused in a state where the mutual positions of the core part filter materials are exchanged, and the target uniform cross-sectional shape is not formed. Various problems occur, for example, the resistance when passing through the process of converging the core part filter material is remarkably increased, making it difficult to manufacture a sheath-core type filter.
[0021]
Further, the core part filter material may have a round cross section or another irregular cross section, but is preferably a hollow fiber in order to obtain a flavor and smoke amount that are differentiated from general filters.
[0022]
Furthermore, in this invention, it is preferable to apply | coat an adhesive agent to a core part filter material. By applying the adhesive, it becomes easy to focus and fix the plurality of core part filter materials in a desired shape with high accuracy.
The adhesive that can be used is not limited to a material that cures in a short time, but any liquid that has the effect of making the cross-sectional shape of the converging material of the core filter material difficult to collapse during the manufacturing process of the sheath / core type filter. Perfumes and the like can also be used as an adhesive.
[0023]
Next, the manufacturing apparatus of the sheath-core type tobacco filter of the present invention will be specifically described with reference to the drawings.
FIG. 1 is an overall configuration diagram schematically showing an example of the manufacturing apparatus of the present invention. In the present invention, when inserting the plurality of core part filter materials 12 into the opened long fiber crimped tow 11, the position defining guide 16 for defining the positional relationship between the plurality of core part filter materials, and the core It is important to include a focusing guide 17 that focuses the partial filter material 12 so as to have a desired cross-sectional shape.
[0024]
The core part filter material 12 is pulled out from the storage part 28, and a position defining guide 16 that defines the positional relationship between the plurality of core part filter materials, and a converging unit that focuses the core part filter material 12 so as to have a desired cross-sectional shape. It passes through the guide 17, is supplied to the core part filter material insertion guide 19, passes through the air jet 20, and is supplied into the tongue 21.
[0025]
On the other hand, the long fiber crimped tow 11 which is a filter material for the sheath portion is opened by a known opening device 26, and is preferably uniformly coated with a plasticizer such as triacetin, and from the delivery roll 25 to the air jet 20 It is supplied into the tongue 21 through the periphery of the core part filter material insertion guide 19.
[0026]
The bundle 13 of the long fiber crimped tow 11 and the core filter material 12 is gradually converged so as to have a desired diameter in the process of moving through the tongs 21, and an adhesive application device 24 is provided around the end on one side. A cylindrical article 14 is formed by winding a web 23 having an adhesive applied to the edge portion, and the cylindrical article 14 is cut into a desired length by a cutting device 27. A sheath / core type filter 15 composed of a core made of the converged material 13 and a sheath made of the long fiber crimped tow 11 is manufactured.
[0027]
FIG. 3 shows an example of the position defining guide 16 used when the seven core part filter materials are arranged so as to have a cross-sectional shape in which each side of the regular hexagon is circumscribed as shown in FIG.
The position defining guide 16 is provided with a plurality of linear through holes 29 according to the planned number and arrangement of the core part filter materials 12, and the core part filter material 12 passes through the through holes 29. Defines the mutual position of the core filter material. In the illustrated example, one through-hole 29 is formed on the center line of the cylindrical block, and six through-holes 29 are formed on the concentric circles with a phase difference of 60 °. The six through-holes 29 arranged on the concentric circles have a large space between each other on the inlet side of the core filter material 12, and until the core filter materials 12 are almost converged at the outlet, The interval is narrowed.
[0028]
Each core part filter material 12 is supplied to a focusing guide 17 which is provided on the downstream side after passing through the through hole 29 of the position defining guide 16 and converges the core part filter material 12 so as to have a desired cross-sectional shape. The
[0029]
FIG. 4 shows the position defining guide 16 and the focusing guide 17 arranged adjacent to the downstream side thereof in a cross section. The focusing guide 17 is provided with an inlet portion 17a processed into a funnel shape. The inlet portion 17a has a cross-sectional area sufficient to introduce the convergent object 13 emerging from the position defining guide 16, and a desired cross-sectional shape of the convergent object 13, and an outlet portion following the inlet portion 17a. The passage 17b has a cross-sectional shape that substantially matches the cross-sectional shape and cross-sectional area of the final converging object 13.
[0030]
The core part filter material 12 in which the desired arrangement relationship is defined by the position defining guide 16 passes through the converging guide 17 and becomes a converging object 13 of the core part filter material 12 having a desired cross-sectional shape and cross-sectional area.
In the present invention, two or more position-defining guides 16 and two or more focusing guides 17 may be provided in order to focus the core part filter material 12 into various cross-sectional shapes.
[0031]
Further, in the present invention, as shown in FIG. 2, in order to prevent the cross-sectional shape of the converging object 13 of the core part filter material 12 from collapsing, an adhesive application device 42 for applying an adhesive to the core part filter material 12 is provided. It is preferable to provide. The adhesive application device 42 is preferably arranged on the upstream side of the position defining guide 16 and the focusing guide 17.
In addition, when the position defining guide 16 and the focusing guide 17 are separated from each other, the adhesive application device 42 can be disposed between the position defining guide 16 and the focusing guide 17. The adhesive may be applied to the entire periphery or a part of the core part filter material.
[0032]
FIG. 6 shows an example of an adhesive application device that applies an adhesive to the entire periphery of the core section filter member 12 having a circular cross section. An adhesive application device 32 in the illustrated example is roughly composed of a porous body 33 and a cylindrical structure 34 surrounding the porous body 33, and a string-like core is provided on the front and rear surfaces of the cylindrical structure 34. Opening portions 35 and 36 communicating with each other to pass the partial filter material 12 are provided, and an adhesive is attached to the porous body 33 accommodated in the cylindrical structure 34 at a part of the peripheral surface thereof. Is provided with an adhesive supply path 37. The porous body 33 is formed with a passage 33a that communicates with the front and rear opening portions 35 and 36 of the structure 34 and allows the core filter material 12 to pass therethrough. For the porous body 33, for example, various sintered bodies or hard foamed resin are used.
[0033]
The core part filter material 12 enters the passage 33 a of the porous body 33 from the inlet side opening 35 of the adhesive application device 32 and passes through the inside of the porous body 33. After the adhesive is uniformly applied to the periphery thereof, the outlet side opening 36 is supplied to the downstream process.
[0034]
At this time, the diameter of the outlet side opening portion 36 of the cylindrical structure 34 should be large enough not to contact the adhesive applied around the core portion filter material. The adhesive application device 32 can easily change the amount of adhesive applied by changing the supply rate of the adhesive supplied to the device 32.
[0035]
Further, in the present invention, the converging object 13 of the core part filter material 12 passes through the core part filter material insertion guide 19 and is converged by being surrounded by the long fiber crimped tow 11 in the process of moving in the tongue 21. Form a structure. At this time, the core portion filter material insertion guide 19 includes a funnel-shaped inlet portion 19 a and an elongated hollow tube 31.
[0036]
In order to accurately arrange the string-like converging object 13 at a desired position in the manufactured sheath-core type filter 15 having a sea core structure, the tip 31 of the core portion filter material insertion guide 19 is positioned in the axial direction. It is important whether it is in position. The bundle 13 of the long fiber crimped tow 11 and the core part filter material 12 supplied into the tongue 21 is gradually compressed so as to approach a desired diameter in the process of moving inside the tongue 21 downstream.
[0037]
Therefore, when the bundle 13 of the core part filter material 12 is supplied into the long fiber crimped tow 11 in the upstream part in the tongue 21 in which the density of the long fiber crimped tow 11 is relatively small, In the fiber crimped tow 11, the converging object 13 of the core part filter material 12 can move relatively freely in the cross-sectional direction, and the converging object 13 of the long fiber crimped tow 11 and the core part filter material 12 reaches a desired diameter. The distance traveled until is increased, and the degree of compression is also increased.
[0038]
Therefore, in order to accurately arrange the string-like converging object 13 made of the core part filter material 12 at a desired position in the filter, the converging object 13 of the core part filter material 12 is made to be a long fiber on the downstream side in the tongue 21. It is desirable to supply the crimped tow 11, that is, to make the tip 31 of the core portion filter material insertion guide 19 as downstream as possible.
[0039]
However, if the position of the tip 31 of the core part filter material insertion guide 19 is too downstream, the space through which the long fiber crimped tow 11 can pass near the tip 31 of the guide 19 becomes small, and the long fiber crimped tow 11 The resistance at the time of passing through the portion is remarkably increased, and the continuous production of the sheath-core type filter 15 is likely to be difficult. Therefore, the tip 31 of the core portion filter material insertion guide 19 needs to satisfy the following formula (1). is there.
[0040]
0.013 <W ÷ (ρ × L × (A−Ag)) <0.06 (1)
However, the sign in equation (1) is
W: Filling amount of long fiber crimped tow into the filter plug to be rolled up (g / rod)
L: Length of the filter plug to be rolled up (cm)
ρ: Density of long fiber crimped tow (g / cm ³ )
A: Cross-sectional area in the tongue at the tip of the core part filter material insertion guide (cm ² )
Ag: sectional area (cm ² ) of the tip of the core part filter material insertion guide
Indicates.
[0041]
Here, when W ÷ (ρ × L × (A−Ag)) is not more than 0,013, the converging object 13 of the core part filter material 12 is relatively free to move in the cross-sectional direction, and further, the long fiber crimp. The distance that the tow 11 and the converging object 13 of the core filter material 12 move to reach the desired diameter and the degree of compression increase, so that the string-like converging at a desired position in the sheath-core type filter 15 is achieved. It becomes difficult to arrange the object 13 with high accuracy and to pass the converging object 13 of the core part filter material 12 through the tongue 21 while maintaining its cross-sectional shape.
[0042]
On the other hand, when W ÷ (ρ × L × (A−Ag)) is 0.06 or more, the space through which the long fiber crimped tow 11 can pass in the vicinity of the tip 31 of the core part filter material insertion guide 19 becomes small. Since the resistance when the long fiber crimped tow 11 passes through a narrow portion of the space is remarkably increased, the long fiber crimped tow 11 is loosened before the air jet 20, making it difficult to manufacture the sheath / core type filter 15. Happens.
Further, even if the production of the filter 15 does not become difficult, the production speed of the filter is slowed down because the long fiber crimped tow 11 in front of the air jet 20 suppresses looseness. It may be necessary to do this.
[0043]
The long fiber crimped tow 11 and the converging product 13 of the core part filter material are gradually converged so as to have a desired diameter in the process of moving through the tongs 21, and are integrated into a cylindrical shape by winding a web around them. A sheath-core type filter composed of a core made of a converging material 13 and a sheath made of long-fiber crimped tows 11 of a plurality of core part filter materials 12 by forming an object 14 and cutting it into a desired length 15 can be manufactured.
[0044]
Hereinafter, the present invention will be described more specifically with reference to examples.
Example 1
Cellulose acetate tow with a Y cross-section of 4.0 denier and a total fineness of 40,000 denier is used as the filter material for the sheath, and a polyethylene hollow fiber 7 with an outer diameter of 0.678 mm is used as the core filter material in the center of the filter. A sheath-core type filter having a diameter of 7.8 mm, a length of 120 mm, and a cellulose acetate tow filling amount of 0.65 g / piece in which the book is arranged in the cross-sectional shape shown in FIG. 7 is shown in FIGS. The position regulating guide 16 and the focusing guide 17 shown in FIG. 4 having an inlet portion with a diameter of 8 mm processed into a funnel shape were used and manufactured using the manufacturing apparatus of the present invention shown in FIG.
[0045]
Also, the core portion filter material insertion guide has a tip outer diameter of 2.5 mm and an inner diameter of 2.1 mm, and the tip has a space cross-sectional area perpendicular to the axial direction in the tongue of 1.13 cm ^2. It was installed and used so that it might become a position.
It was possible to produce a sheath / core type filter whose core part had the cross-sectional shape shown in FIG. 7 stably for a long time.
[0046]
(Comparative Example 1)
A sheath / core type filter was manufactured according to the same procedure as in Example 1 except that the position defining guide 16 for regulating the positional relationship between the core part filter materials was not provided. Each core part filter material has a phenomenon that the resistance when passing through the focusing guide is remarkably increased, the focusing form is also unstable, and the core part is stable for a long time while maintaining the cross-sectional shape shown in FIG. Therefore, it was difficult to manufacture a high-quality sheath / core type filter.
[0047]
As can be understood from the above description, according to the manufacturing method and the manufacturing apparatus of the sheath-core type tobacco filter of the present invention, even when there are a plurality of filter materials for the core portion, A high-quality sheath-core type filter in which the filter material is disposed at a desired position with sufficient accuracy can be obtained.
[Brief description of the drawings]
FIG. 1 is an explanatory view schematically showing an example of a manufacturing procedure by a sheath / core type filter manufacturing apparatus of the present invention.
FIG. 2 is an explanatory view schematically showing another example of the manufacturing procedure by the sheath / core type filter manufacturing apparatus of the present invention.
FIG. 3 is an explanatory view of the structure of a position defining guide arranged in the sheath / core type filter manufacturing apparatus of the present invention.
FIG. 4 is a cross-sectional view showing a converging state of a core part heater material by a position defining guide and a converging guide arranged in the sheath / core type filter manufacturing apparatus of the present invention.
FIG. 5 is an enlarged cross-sectional view showing a positional relationship among a core part filter material insertion guide, an air jet, and a tongue disposed in the sheath / core type filter manufacturing apparatus of the present invention.
FIG. 6 is an explanatory view of an adhesive application state by an adhesive application device arranged in the sheath / core type filter manufacturing apparatus of the present invention.
FIG. 7 is a cross-sectional view showing an example of a converging object of a core part filter material focused by a focusing nozzle.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 11 Long fiber crimped tow 12 Core part filter material 13 Condensate 16 Position-defining guide 17 Concentration guide 17a Inlet part 17b Outlet part 19 Core part filter material insertion guide 19a Funnel-shaped inlet part 19b (elongated) hollow tube 20 Air jet 21 Tongue 22 Conveyor belt 23 Wrapping paper 24 Adhesive application device 25 Delivery roll 26 Opening device 27 Cutting device 28 Storage unit 29 Through hole 31 Tip 32 (of core part filter material insertion guide) Adhesive application device 33 Porous body 33a Passage 34 Cylinder -Like structure 35 Inlet opening 36 Outlet opening 37 Adhesive supply path

Claims (7)

A method for producing a sheath-core type cigarette filter in which a plurality of core part filter materials are inserted into an opened long fiber crimped tow,
Defining the mutual relationship of the plurality of core part filter materials, and after completion of this regulation, the plurality of core part filter materials so as to have a desired cross-sectional shape , and the plurality of core part filters Maintaining the mutual positional relationship of the materials, converging and inserting into the opened long fiber crimped tow,
A method for producing a sheath-core type cigarette filter, comprising:   The method for producing a sheath-core type tobacco filter according to claim 1, wherein an adhesive is applied to the core part filter material. An apparatus for producing a sheath-core type cigarette filter in which a plurality of core part filter materials are inserted into the opened long fiber crimped tow,
A position defining guide for defining the mutual arrangement relationship of a plurality of core part filter materials;
A focusing guide for focusing while maintaining the mutual positional relationship of the plurality of core part filter materials so that the plurality of core part filter materials have a desired cross-sectional shape;
An apparatus for manufacturing a sheath-core type cigarette filter, comprising:   4. The apparatus for manufacturing a sheath-core type tobacco filter according to claim 3, wherein two or more of the position defining guide and the focusing guide are provided. A core portion filter material insertion guide further comprising a funnel-shaped inlet portion and a cylindrical portion on the downstream side of the convergence guide, and a tip on the downstream side of the cylindrical portion satisfying the following formula (1): Item 5. The apparatus for producing a sheath-core type filter according to Item 3 or 4.
0.013 <W ÷ (ρ × L × (A−Ag)) <0.06 (1)
However, the code | symbol in Formula (1) shows the following.
W: Filling amount of long fiber crimped tow into the filter plug to be rolled up (g / rod)
L: Length of the filter plug to be rolled up (cm)
ρ: Density of long fiber crimped tow (g / cm ³ )
A: Cross-sectional area in the tongue at the tip of the core part filter material insertion guide (cm ² )
Ag: sectional area (cm ² ) of the tip of the core part filter material insertion guide   The sheath-core type tobacco filter manufacturing apparatus according to any one of claims 3 to 5, further comprising an adhesive application device that applies an adhesive to the core part filter material.   The sheath-core type tobacco filter according to any one of claims 3 to 6, wherein the adhesive application device has a configuration in which an adhesive is applied around the core part filter material through a porous body. apparatus.

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