WO2010041660A1 - Method for manufacturing tobacco sheet, and apparatus for manufacturing the same - Google Patents

Method for manufacturing tobacco sheet, and apparatus for manufacturing the same Download PDF

Info

Publication number
WO2010041660A1
WO2010041660A1 PCT/JP2009/067413 JP2009067413W WO2010041660A1 WO 2010041660 A1 WO2010041660 A1 WO 2010041660A1 JP 2009067413 W JP2009067413 W JP 2009067413W WO 2010041660 A1 WO2010041660 A1 WO 2010041660A1
Authority
WO
WIPO (PCT)
Prior art keywords
base web
moisture
moisture content
dryer
sheet
Prior art date
Application number
PCT/JP2009/067413
Other languages
French (fr)
Japanese (ja)
Inventor
河田儀雄
Original Assignee
日本たばこ産業株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 日本たばこ産業株式会社 filed Critical 日本たばこ産業株式会社
Publication of WO2010041660A1 publication Critical patent/WO2010041660A1/en

Links

Images

Classifications

    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
    • A24B3/00—Preparing tobacco in the factory
    • A24B3/14—Forming reconstituted tobacco products, e.g. wrapper materials, sheets, imitation leaves, rods, cakes; Forms of such products
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
    • A24B15/00—Chemical features or treatment of tobacco; Tobacco substitutes, e.g. in liquid form
    • A24B15/10—Chemical features of tobacco products or tobacco substitutes
    • A24B15/12—Chemical features of tobacco products or tobacco substitutes of reconstituted tobacco
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
    • A24B15/00—Chemical features or treatment of tobacco; Tobacco substitutes, e.g. in liquid form
    • A24B15/18—Treatment of tobacco products or tobacco substitutes
    • A24B15/28—Treatment of tobacco products or tobacco substitutes by chemical substances

Definitions

  • the present invention relates to a sheet tobacco manufacturing method and a manufacturing machine for the sheet tobacco that can be stably manufactured while maintaining high quality sheet tobacco coated with a liquid flavor.
  • Sheet tobacco includes a base web and a fragrance added to the base web, and the base web is manufactured through the following treatment.
  • the cigarette raw material includes, for example, the middle bone (petiole, middle cocoon) separated from the leaf tobacco in the process of cutting the leaf tobacco into the tobacco, the tobacco fine powder generated in the process of manufacturing the cigarette, and the like.
  • the above-mentioned base web is subjected to a liquid fragrance application and then dried to form a sheet of tobacco.
  • Such sheet tobacco is cut and formed into regenerated tobacco, and thereafter, the regenerated tobacco is subjected to a treatment such as humidification and used as a part of a cigarette filling material.
  • the liquid fragrance described above contains water and a soluble fragrance component dissolved in the water, and the fragrance component is obtained by extraction from tobacco raw materials.
  • Patent Document 1 The production of a general sheet cigarette is disclosed in, for example, Patent Document 1, and the application of a liquid perfume to a base web can use, for example, a coating apparatus for producing coated paper in the papermaking field.
  • a coating apparatus is disclosed in Patent Document 2, for example.
  • the water content of the base web before application is set to a constant water content, for example, 45% by weight. It needs to be adjusted accurately.
  • the base web is dried to complete the sheet tobacco, the finished moisture content of the sheet tobacco is accurately adjusted to, for example, 12% by weight in order to maintain high quality of the sheet tobacco.
  • the base web before the application of the liquid fragrance to the base web is dried by a pre-dryer, a so-called Yankee type dryer, and this Yankee type dryer includes a drying drum.
  • the drum has an outer peripheral surface controlled to a constant temperature. That is, the base web is only pre-dried when passing through the drying drum while being in contact with the outer peripheral surface of the drying drum, and the Yankee dryer does not have a function of adjusting the moisture content of the base web.
  • the base web is dried by a post dryer, and this pre-dryer includes a drying furnace containing a heater and a moisture meter disposed on the outlet side of the drying furnace. .
  • the moisture meter measures the final moisture content of the base web sent from the dryer, that is, the sheet tobacco, and the temperature of the heater is feedback-controlled based on the measurement result.
  • heater temperature control based on the moisture meter measurement results is effective. It is considered to function.
  • An object of the present invention is to provide a sheet tobacco manufacturing method and a manufacturing machine for the sheet tobacco that can be stably manufactured while maintaining high quality sheet tobacco coated with a liquid flavor.
  • a base web that is formed from tobacco raw material and should be a sheet tobacco is transferred along a predetermined transfer path, In the process of transferring the base web, the moisture content of the base web is adjusted to a target moisture content, Applying liquid fragrance to the base web, Thereafter, the base web is dried by first to third heaters arranged sequentially from the upstream side along the transfer path to form a sheet tobacco,
  • the drying process of the base web is as follows: A first process for controlling the temperature of the third heater located on the most downstream side based on the moisture content of the sheet tobacco, and controlling the moisture content of the sheet tobacco by feedback control so as to match the moisture content of the sheet tobacco; A second process for controlling the temperature of one of the first and second heaters by one of feedforward control and constant value control based on the moisture content of the base web before the liquid flavor is applied.
  • the present invention provides a manufacturing machine for performing the above manufacturing method, A transport path for transporting a base web formed from tobacco material and to be sheet-fed; A pre-dryer that is disposed in the transfer path, heats the base web with steam, and dries the base web; A first moisture meter for measuring the moisture content of the base web after passing through the pre-dryer; A moisture controller that controls the steam supplied to the pre-dryer based on the moisture content measured by the first moisture meter, and adjusts the moisture content of the base web to a target moisture content; An applicator disposed on the transfer path, downstream of the pre-dryer, for applying a liquid perfume to the base web; A post dryer that is disposed on the transfer path downstream of the coating device and forms the sheet tobacco by drying the base web, and is sequentially disposed from the upstream side along the transfer path.
  • a post dryer including first to third heaters; A second moisture meter for measuring the moisture content of the sheet tobacco after passing through the post dryer; A drying controller for controlling the temperature of the first to third heaters based on the amount of moisture measured by the first and second moisture meters, A first control section that controls the amount of moisture in the sheet cigarette based on the amount of moisture in the sheet cigarette measured by the second moisture meter with feedback control so that the amount of moisture in the sheet cigarette matches the finishing moisture amount.
  • a second control section that controls the temperature of one of the first and second heaters based on the moisture content of the base web measured by the first moisture meter by one of feedforward control and constant value control. .
  • the subsequent drying process of the base web is appropriately performed, the finishing moisture amount of the sheet tobacco is accurately adjusted to the finishing moisture amount.
  • the temperature of the third heater is feedback-controlled so that the moisture content of the sheet tobacco matches the finished moisture content, while the temperature of one of the first and second heaters is controlled.
  • the feedforward control or the constant value control is performed based on the moisture content of the sheet tobacco immediately before the liquid flavor is applied.
  • Such feedback control cooperates with feedforward control or constant value control to quickly complete the drying process of the base web, while stably maintaining the moisture content of the sheet tobacco at the final moisture content.
  • the same single-wavelength optical moisture meter can be used for adjusting the moisture content of the base web to the target moisture content and for feedforward control or constant value control.
  • a similar single-wavelength optical moisture meter can also be used for measuring the moisture content of sheet tobacco.
  • the pre-dryer is a Yankee-type dryer and includes a drying drum that forms a part of the transfer path, and the moisture controller controls the moisture content measured by the first moisture meter. Based on this, the vapor pressure supplied to the Yankee dryer is feedback-controlled according to the PI operation.
  • the post dryer further includes a drying furnace in which first to third heaters are built, and each of the first to third heaters has a plurality of infrared heater elements.
  • the temperature of the second heater is feedforward controlled
  • the temperature of the first heater is measured by a component meter that measures the absorbance of the base web after the liquid fragrance is applied. Based on the result, it is preferable to perform constant value control.
  • the moisture content of the base web is adjusted to the target moisture content before the liquid flavor is applied, while the base after the liquid flavor is applied based on the moisture content. Since the web drying process is controlled, stable production of high-quality sheet tobacco becomes possible.
  • the base web BW for the sheet cigarette is transferred along a predetermined transfer path.
  • the base web BW is formed from the above-described tobacco material (medium bone, fine tobacco powder), a binder, a reinforcing material, and the like. More specifically, the tobacco raw material is first subjected to an extraction process, and in this extraction process, a tobacco component, that is, a fragrance component is extracted from the tobacco raw material. As a result, the tobacco raw material is separated into a liquid perfume containing a perfume component and a tobacco raw material after extraction, that is, a residue. After such a residue is beaten, it is formed into a slurry having a predetermined concentration together with the binder and the reinforcing material.
  • the base web BW is formed from a slurry through a papermaking process. The base web BW is subjected to dehydration and drying treatments, and then supplied to a sheet cigarette manufacturing machine that implements the manufacturing method of the present invention.
  • the manufacturing machine includes a pre-dryer 10, a liquid flavoring applicator 20, and a post-dryer 30, and the pre-dryer 10, the applicator 20, and the post-dryer 30 are included in the base web BW. Located downstream of the production section, along the transfer path.
  • the pre-dryer 10 is a rotary type, so-called Yankee type dryer, and has a drying drum 11.
  • the outer peripheral surface of the drying drum 11 forms a part of the transfer path. Therefore, during rotation of the drying drum 11, the base web BW is transferred while being in contact with the outer peripheral surface of the drying drum 11.
  • a water vapor supply path is connected to the drying drum 11, and the water vapor supply path supplies water vapor into the drying drum 11, and the water vapor heats the outer peripheral surface of the drying drum 11 to a predetermined temperature. Therefore, when the base web BW passes through the drying drum 11, the base web BW is dried, and the moisture content of the base web BW is controlled to the target moisture content.
  • the pre-dryer 10 includes a moisture controller 12.
  • the moisture controller 12 is electrically connected to the first moisture meter 13, the temperature sensor 14, the pressure gauge 15, and the pressure control valve 16.
  • the first moisture meter 13 measures the moisture content of the base web BW immediately after passing through the drying drum 11 and supplies the measurement result to the moisture controller 12.
  • the first moisture meter 13 is a single wavelength type (wavelength 1450 nm) optical moisture meter using, for example, near infrared light.
  • the temperature sensor 14 measures the temperature of the outer peripheral surface of the drying drum 11 and supplies the measurement result to the moisture controller 12.
  • the pressure gauge 15 and the pressure control valve 16 are respectively disposed in the water vapor supply path.
  • the pressure gauge 15 is positioned downstream of the pressure control valve 16, measures the pressure of water vapor supplied to the drying drum 11, and supplies the measurement result to the moisture controller 12.
  • the moisture controller 12 targets the moisture content of the base web BW after passing through the drying drum 11 based on the measurement results supplied from the first moisture meter 13, the temperature sensor 14 and the pressure gauge 15, that is, three control parameters.
  • the valve opening degree of the pressure control valve 16 is feedback-controlled so that the water content (for example, 45% by weight) is obtained.
  • the moisture controller 12 determines the correlation between the pressure of the water vapor supplied to the drying drum 11 and the temperature of the outer peripheral surface of the drying drum 11, and the change in the pressure of the water vapor changes the temperature of the outer peripheral surface of the drying drum 11.
  • the valve opening degree of the pressure control valve 16 that determines the drying temperature of the drying drum 11 is changed based on the PI control.
  • the base web BW that has passed through the pre-dryer 10 is supplied to the coating device 20 in a state in which the water content is maintained at the target water content.
  • the coating device 20 is disposed downstream of the pre-dryer 10 and includes a pair of coating rollers 21a and 21b. These application rollers 21a and 21b can be rotated at a constant speed (circumferential speed) by a motor (not shown). When the coating rollers 21a and 21b are rotating, the base web BW passes between the coating rollers 21a and 21b from the top to the bottom. On the other hand, the liquid fragrance described above is supplied between the application rollers 21a and 21b from the sustained release, and this liquid fragrance is applied to one surface of the base web BW when the base web BW passes between the application rollers 21a and 21b.
  • the coating rollers 21a and 21b can be rotated at a constant speed (circumferential speed) by a motor (not shown).
  • the liquid fragrance described above is supplied between the application rollers 21a and 21b from the sustained release, and this liquid fragrance is applied to one surface of the base web BW when the base web BW passes between the application rollers 21a and 21b.
  • the amount of liquid flavor applied to the base web BW is determined by the gap between the pair of application rollers 21a and 21b. Specifically, the coating amount increases and decreases according to the increase and decrease of the roller gap. Therefore, the coating device 20 includes an adjustment mechanism 22 that adjusts the roller gap, and this adjustment mechanism 22 enables adjustment of the coating amount.
  • FIG. 2 shows details of the adjustment mechanism 22.
  • the application roller 21a is rotatably supported on the upper ends of the pair of support legs 27, and these support legs 27 are fixed on the base 21c.
  • the application roller 21b is rotatably supported on the upper ends of a pair of support legs 28, and these support legs 28 are supported on a base 21c via a slider 21d.
  • the slider 21d is movable on the base 21c in a direction close to the application roller 21a and away from the application roller 21a. Such movement of the slider 21d makes it possible to adjust a gap between the application rollers 21a and 21b. To do.
  • the slider 21d has one end positioned on the application roller 21a side and the other end far from the application roller 21a.
  • One end of the slider 21d and the support leg 27 are connected by a spring 21g, and the spring 21g presses the slider 21d in a direction in which the slider 21d is separated from the application roller 21a.
  • a wedge unit 21f is disposed at the other end of the slider 21d.
  • the wedge unit 21f includes a fixed wedge 40 connected to the other end of the slider 21d and a movable wedge 41 slidably contacting the fixed wedge 40.
  • a rod member 21e extends from the movable wedge 41, and this rod member 21e is connected to a compressed air type actuator 25, for example.
  • the actuator 25 can move the movable wedge 41 up and down through the rod member 21e as seen in FIG. Now, when the movable wedge 41 is lowered, the movable wedge 21 moves the fixed wedge 40, that is, the slider 21d toward the application roller 21a against the pressing force of the spring 21g. Is reduced. On the other hand, when the movable wedge 41 is raised, the spring 21g pushes back the slider 21d in the direction away from the application roller 21a, and as a result, the roller gap is increased.
  • a hydraulic or electric actuator can be used in place of the compressed air actuator 25.
  • a so-called jack type lifting mechanism can be used instead of the wedge unit 21f described above.
  • the operation of the actuator 25 is controlled by the gap controller 43 in order to adjust the roller gap described above.
  • the gap controller 43 includes a control section 44, which is electrically connected to the gap sensor 24 and the second moisture meter 23 as a component meter.
  • the gap sensor 24 measures the roller gap and supplies the measurement result to the control section 44.
  • the second moisture meter 23 is arranged immediately downstream of the pair of application rollers 21a and 21b, measures the absorbance of the base web BW coated with the liquid fragrance, and controls this measurement result. Feed to section 44.
  • the second moisture meter 23 is a single-wavelength type (wavelength 1450 nm) optical moisture meter that uses near-infrared light, like the first moisture meter 13 described above.
  • This type of optical moisture meter measures the amount of water contained in the measurement object based on the absorbance of the measurement object.
  • the fragrance component of the liquid fragrance is a brownish brown soluble component containing nicotine, sugar, etc., but generally between the amount of moisture (absorbance) of the liquid fragrance and the amount of the fragrance component contained in the liquid fragrance. Correlation is low.
  • the absorbance spectrum of the liquid fragrance (fragrance component) and the absorbance spectrum of water show the same tendency.
  • Aroma ratio A / (A + B)
  • the weight A of the fragrance component paying attention to the fact that the fragrance component is exclusively saccharide, and measuring the sugar content of the base web BW per unit area using a saccharimeter, this measurement is based on the sugar content.
  • the weight A of the fragrance component can be calculated.
  • a map showing the relationship between the absorbance and the aroma ratio with the roller gap G as a parameter is prepared in advance, and this map is stored in the storage section 26 of the gap controller 43.
  • the control section 44 When the absorbance of the base web BW is measured by the second moisture meter 23 and the measurement result is supplied to the control section 44 of the gap controller 43 together with the roller gap G measured by the gap sensor 24, the control section 44 is in contact with the roller gap G. Based on the absorbance, the aroma ratio is read from the map. If the read aroma ratio does not match the target aroma ratio, the control section 44 feeds back the operation of the actuator 25 described above so that the roller gap G matches the target gap corresponding to the target aroma ratio. The amount of the fragrance component applied to the base web BW, that is, the scent ratio is maintained at the target scent ratio.
  • the post dryer 30 includes a conveyor 31.
  • the conveyor 31 receives the base web BW supplied from the coating device 20, and transfers the received base web BW along the transfer path described above.
  • the conveyor 31 passes through the drying furnace 50, and the drying furnace 50 has a length of, for example, 5 to 6 m along the transfer path.
  • first to third heaters H1, H2, and H3 are sequentially arranged from the upstream side of the transfer path. That is, the first to third heaters H1, H2, and H3 are arranged separately in the upstream region, the middle flow region, and the downstream region in the drying furnace 50, and individually heat the temperatures of the corresponding regions.
  • each heater H includes, for example, three infrared heater elements 32 and a power supply V. These infrared heater elements 32 are connected in parallel to the power supply V. Has been.
  • the drying furnace 50 includes a source of hot air or hot air (not shown) separately from the first to third heaters H1, H2, and H3.
  • the generation source generates a flow of hot air or hot air passing through the drying furnace 50, and maintains the temperature in the drying furnace 50 at a predetermined high temperature as a whole.
  • the post dryer 30 includes a drying controller 52, which individually controls the heat generation temperatures of the first to third heaters H1, H2, and H3.
  • the drying controller 52 includes a constant value control section 33a, an FF control section 33b, and an FB control section 33c.
  • These control sections 33a, 33b, and 33c are power sources V of the first to third heaters H1, H2, and H3. Are connected to each.
  • temperature sensors 34a, 34b, 34c for detecting the temperatures (heat generation temperatures) of the first to third heaters H1, H2, H3 are arranged in the drying furnace 50, and these temperature sensors 34a, 34b, 34c are constant values.
  • the control section 33a, the FF control section 33b, and the FB control section 33c are connected to each other.
  • the second moisture meter 23 is connected to the constant value control section 33a, and the first moisture meter 13 is connected to the FF control section 33b.
  • a third moisture meter 53 is disposed outside the drying furnace 50 in the vicinity of the outlet of the drying furnace 50.
  • the third moisture meter 53 measures the moisture content of the base web BW carried out from the drying furnace 50, that is, the completed sheet tobacco, and supplies the measurement result to the FB control section 33c.
  • the third moisture meter 53 is a multi-wavelength type (including a wavelength of 1920 nm) optical moisture meter.
  • the drying controller 52 basically feedback-controls the heating temperature (drying temperature) in the drying furnace 50 based on the moisture content of the sheet tobacco measured by the third moisture meter 33, and determines the finished moisture content of the completed sheet tobacco, for example. Adjust to 12 wt%.
  • the post drying control (temperature) of the base web BW by the drying furnace 50, the predrying control (water content) of the base web BW by the predryer 10, and the liquid flavor application control (application amount) by the coating apparatus 20 are mutually controlled. Since the objects are completely different, it is inevitable that differences occur in the control responsiveness of these post-drying control, pre-drying control and coating control.
  • the temperature and moisture content of the base web BW which change due to the execution of pre-drying control and coating control, are added as disturbance factors. If the function is not performed, the final finishing moisture content of the sheet tobacco may not be stabilized.
  • the drying controller 52 first uses the first and second heaters H1 and H2 to perform temperature control in the drying furnace 50 for canceling the disturbance factors described above, and thereafter, the third heater H3. Is used to control the temperature in the drying furnace 50 so that the final finishing moisture content of the sheet tobacco matches the target value.
  • the control response of application control is faster than the control response of pre-dry control and post-dry control. Therefore, the constant value control section 33a of the drying controller 52 controls the temperature of the first heat H1 at a constant value based on the absorbance (addition ratio) of the base web BW measured by the second moisture meter 23.
  • Such constant-value control cancels out disturbance factors caused by fluctuations in the moisture content of the base web BW generated by the application of the liquid fragrance.
  • the control response of pre-drying control is much slower than the control response of post-drying control. Therefore, the FF control section 33b of the drying controller 52 performs feedforward control of the temperature of the first heater H1 based on the base web BW measured by the first moisture meter 13. Such feedforward control cancels the disturbance factor caused by the deviation of the moisture content of the base web BW from the target moisture content generated by the response delay of the predrying control.
  • the drying temperature of the base web BW determined by the temperature of the third heater H3 directly greatly affects the finishing moisture amount of the sheet tobacco. Therefore, the FB control section 33c of the drying controller 52 feedback-controls the temperature of the third heater H3 according to the moisture content of the sheet tobacco measured by the third moisture meter 33.
  • the base web BW has already undergone the drying process by the constant value control and the feedforward control. Therefore, the feedback control is executed in a state where the above-described disturbance factor is already suppressed, and the finishing moisture amount of the sheet tobacco can be stably maintained at the target moisture amount.
  • FIG. 7 shows a change in the moisture content of the base web BW after the start of the post-drying control described above. As is apparent from FIG. 7, the moisture content of the base web BW reaches the finished moisture content when about 30 minutes have elapsed from the start of the post-drying control.
  • the production machine of the present invention can quickly produce high-quality sheet tobacco in which the scent ratio and the finished moisture content are maintained at the target values, respectively.
  • first and second moisture meters 13 and 23 are used when the post drying control is executed, it is not necessary to add a new sensor or the like for the post drying control.
  • the drying controller 52 performs feedforward control of the temperature of the first heater H1 based on the output of the first moisture meter 13, and performs constant value control of the temperature of the second heater H2 based on the output of the second moisture meter 23. (See the broken line in FIG. 1).
  • drying controller 52 can simultaneously perform feedforward control based on the output of the first moisture meter 13 and constant value control based on the output of the second moisture meter 23 with respect to the temperatures of the first and second heaters H1 and H2. Is possible.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Drying Of Solid Materials (AREA)
  • Manufacture Of Tobacco Products (AREA)

Abstract

Disclosed is an apparatus for implementing a method for manufacturing a tobacco sheet. The apparatus includes: a pre-dryer for regulating the moisture content in a base web for the tobacco sheet; a coating device for coating a liquid perfume on the base web having a regulated moisture content; and a post-dryer for drying the base web on which the liquid perfume has been coated to form a tobacco sheet and regulating the moisture content of the tobacco sheet to a final moisture content. The post-dryer includes first to third heaters arranged in sequence along the direction in which the base web is transported, wherein the temperature of the third heater is feedback-controlled to adjust the moisture content of the tobacco sheet to the final moisture content, the temperature of the second heater is feed-forward-controlled in accordance with the moisture content of the base web that has passed through the pre-dryer, and the temperature of the first heater is fixed-value controlled in accordance with the result of a measurement by a component analyser of the light absorbance of the base web that has passed through the coating device.

Description

シートたばこの製造方法及びその製造機Sheet tobacco production method and machine
　本発明は、液状香料が塗布されたシートたばこを高品質に維持しつつ安定して製造することができるシートたばこの製造方法及びその製造機に関する。 [Technical Field] The present invention relates to a sheet tobacco manufacturing method and a manufacturing machine for the sheet tobacco that can be stably manufactured while maintaining high quality sheet tobacco coated with a liquid flavor.
　シートたばこはベースウエブと、このベースウエブに添加された香料とを含み、ベースウエブは以下の処理を経て製造される。先ず、たばこ原料に結合剤、補強材及び水等を混合した混合物が生成される。この混合物は造粒処理され、湿潤粉粒物に形成される。この湿潤粉粒物はウエブ状に圧延され、この後、乾燥処理されてベースウエブに形成される。なお、たばこ原料は、例えば葉たばこを刻たばこに裁刻する過程にて、葉たばこから分離された中骨（葉柄、中肋）、シガレットの製造過程にて発生した刻たばこの細粉等を含む。 Sheet tobacco includes a base web and a fragrance added to the base web, and the base web is manufactured through the following treatment. First, a mixture obtained by mixing a tobacco raw material with a binder, a reinforcing material, water, and the like is generated. This mixture is granulated and formed into a wet powder. The wet powder is rolled into a web, and then dried to form a base web. The cigarette raw material includes, for example, the middle bone (petiole, middle cocoon) separated from the leaf tobacco in the process of cutting the leaf tobacco into the tobacco, the tobacco fine powder generated in the process of manufacturing the cigarette, and the like.
　上述のベースウエブは液状香料の塗布を受けた後、乾燥処理されてシートたばこに形成される。このようなシートたばこは裁刻されて、再生刻たばこに形成され、この後、再生刻たばこは加湿等の処理を受け、シガレットの充填材料の一部として使用される。 The above-mentioned base web is subjected to a liquid fragrance application and then dried to form a sheet of tobacco. Such sheet tobacco is cut and formed into regenerated tobacco, and thereafter, the regenerated tobacco is subjected to a treatment such as humidification and used as a part of a cigarette filling material.
　上述の液状香料は水と、この水に溶解された可溶性の香料成分と含み、この香料成分はたばこ原料から抽出して得られている。 The liquid fragrance described above contains water and a soluble fragrance component dissolved in the water, and the fragrance component is obtained by extraction from tobacco raw materials.
　一般的なシートたばこの製造は例えば特許文献１に開示されており、ベースウエブへの液状香料の塗布には、例えば製紙分野の塗工（コーティング）紙を製造する塗工装置を使用でき、この塗工装置は例えば特許文献２に開示されている。 The production of a general sheet cigarette is disclosed in, for example, Patent Document 1, and the application of a liquid perfume to a base web can use, for example, a coating apparatus for producing coated paper in the papermaking field. A coating apparatus is disclosed in Patent Document 2, for example.
特開２００２－１７６９６４号公報JP 2002-176964 A 特開２００３－２１１０７２号公報JP 2003-211072 A
　ところで、ベースウエブに液状香料が塗布されるとき、ベースウエブに液状香料（香料成分）を均一に塗布するためには、塗布前のベースウエブの水分量は一定の水分量、例えば４５重量％に正確に調整されている必要がある。一方、この後、ベースウエブが乾燥処理されてシートたばこが完成される場合、シートたばこの品質を高く維持するためには、シートたばこの仕上げ水分量は例えば１２重量％に正確に調整されている必要がある。 By the way, when the liquid fragrance is applied to the base web, in order to uniformly apply the liquid fragrance (fragrance component) to the base web, the water content of the base web before application is set to a constant water content, for example, 45% by weight. It needs to be adjusted accurately. On the other hand, when the base web is dried to complete the sheet tobacco, the finished moisture content of the sheet tobacco is accurately adjusted to, for example, 12% by weight in order to maintain high quality of the sheet tobacco. There is a need.
　しかしながら、ベースウエブへの液状香料の塗布前、即ち、前述した圧延処理後のベースウエブはプレ乾燥機、所謂、ヤンキー型乾燥機によって乾燥され、このヤンキー型乾燥機は乾燥ドラムを含み、この乾燥ドラムは一定の温度に制御された外周面を有する。即ち、ベースウエブは、乾燥ドラムの外周面に接触しながら乾燥ドラムを通過する際、プレ乾燥されるだけであり、ヤンキー型乾燥機はベースウエブの水分量を調整する機能を有していない。 However, the base web before the application of the liquid fragrance to the base web, that is, after the rolling treatment described above, is dried by a pre-dryer, a so-called Yankee type dryer, and this Yankee type dryer includes a drying drum. The drum has an outer peripheral surface controlled to a constant temperature. That is, the base web is only pre-dried when passing through the drying drum while being in contact with the outer peripheral surface of the drying drum, and the Yankee dryer does not have a function of adjusting the moisture content of the base web.
　一方、ベースウエブへの液状香料の塗布後、ベースウエブはポスト乾燥機によって乾燥され、このプレ乾燥機はヒータを内蔵する乾燥炉と、この乾燥炉の出口側に配置された水分計とを含む。水分計は乾燥機から送出されたベースウエブ、即ち、シートたばこの仕上げ水分量を測定し、この測定結果に基づき、ヒータの温度がフィードバック制御される。 On the other hand, after applying the liquid fragrance to the base web, the base web is dried by a post dryer, and this pre-dryer includes a drying furnace containing a heater and a moisture meter disposed on the outlet side of the drying furnace. . The moisture meter measures the final moisture content of the base web sent from the dryer, that is, the sheet tobacco, and the temperature of the heater is feedback-controlled based on the measurement result.
　この場合、液状香料の塗布前のベースウエブの水分量や、また、ベースウエブに塗布される液状香料の塗布量がそれぞれ一定であれば、水分計の測定結果に基づくヒータの温度制御は有効に機能すると考えられる。 In this case, if the moisture content of the base web before liquid fragrance is applied and the amount of liquid fragrance applied to the base web are constant, heater temperature control based on the moisture meter measurement results is effective. It is considered to function.
　しかしながら、例え液状香料の塗布量が一定であっても、前述したように液状香料の塗布前のベースウエブの水分量は一定ではない。それ故、ポスト乾燥機に導かれるベースウエブの水分量が大きく変動すれば、ヒータに関する温度制御の応答遅れに起因して、ポスト乾燥機は、シートたばこの仕上げ水分量を目標値に正確に調整することができず、この結果、正確な仕上げ水分量を有するシートたばこの安定した製造が不能となる。 However, even if the amount of liquid fragrance applied is constant, the moisture content of the base web before application of the liquid fragrance is not constant as described above. Therefore, if the moisture content of the base web led to the post dryer fluctuates significantly, the post dryer accurately adjusts the finished moisture content of the sheet cigarette to the target value due to a delay in the temperature control response related to the heater. As a result, stable production of sheet tobacco having an accurate finish moisture content becomes impossible.
　本発明の目的は、液状香料が塗布されたシートたばこを高品質に維持しつつ安定して製造することができるシートたばこの製造方法及びその製造機を提供することにある。 An object of the present invention is to provide a sheet tobacco manufacturing method and a manufacturing machine for the sheet tobacco that can be stably manufactured while maintaining high quality sheet tobacco coated with a liquid flavor.
　上記の目的は本発明のシートたばこの製造方法によって達成され、この製造方法は、
　たばこ原料から形成され且つシートたばことなるべきベースウエブを所定の移送経路に沿って移送し、
　前記ベースウエブの移送過程にて、前記ベースウエブの水分量を目標水分量に調整し、
　前記ベースウエブに液状香料を塗布し、
　この後、前記移送経路に沿って上流側から順次配置された第１～第３ヒータにより前記ベースウエブを乾燥処理してシートたばこに形成し、
　前記ベースウエブの乾燥処理は、
　最も下流に位置する第３ヒータの温度を前記シートたばこの水分量に基づき、前記シートたばこの水分量を仕上げ水分量に一致させるべくフィードバック制御によって制御する第１プロセスと、
　前記液状香料が塗布される前の前記ベースウエブの水分量に基づき、前記第１及び第２ヒータにおける一方のヒータの温度をフィードフォワード制御及び定値制御の一方にて制御する第２プロセスとを含む。 The above object is achieved by a method for manufacturing a sheet cigarette according to the present invention.
A base web that is formed from tobacco raw material and should be a sheet tobacco is transferred along a predetermined transfer path,
In the process of transferring the base web, the moisture content of the base web is adjusted to a target moisture content,
Applying liquid fragrance to the base web,
Thereafter, the base web is dried by first to third heaters arranged sequentially from the upstream side along the transfer path to form a sheet tobacco,
The drying process of the base web is as follows:
A first process for controlling the temperature of the third heater located on the most downstream side based on the moisture content of the sheet tobacco, and controlling the moisture content of the sheet tobacco by feedback control so as to match the moisture content of the sheet tobacco;
A second process for controlling the temperature of one of the first and second heaters by one of feedforward control and constant value control based on the moisture content of the base web before the liquid flavor is applied. .
　また、本発明は上記の製造方法を実施する製造機を提供し、この製造機は、
　たばこ原料から形成され且つシートたばことなるべきベースウエブを移送する移送経路と、
　前記移送経路に配置され、前記ベースウエブを蒸気により加熱し、前記ベースウエブを乾燥させるプレ乾燥機と、
　前記プレ乾燥機を通過した後の前記ベースウエブの水分量を測定する第１水分計と、
　前記第１水分計にて測定した水分量に基づき、前記プレ乾燥機に供給される蒸気を制御し、前記ベースウエブの水分量を目標水分量に調整する水分コントローラと、
　前記移送経路に前記プレ乾燥機の下流に位置して配置され、前記ベースウエブに液状香料を塗布する塗布装置と、
　前記移送経路に前記塗布装置の下流に位置して配置され、前記ベースウエブを乾燥処理してシートたばこに形成するポスト乾燥機であって、前記移送経路に沿って上流側から順次配置された第１～第３ヒータを含む、ポスト乾燥機と、
　前記ポスト乾燥機を通過した後のシートたばこの水分量を測定する第２水分計と、
　前記第１及び第２水分計にて測定した水分量に基づき、前記第１～第３ヒータの温度を制御する乾燥コントローラであって、
　最も下流に位置する第３ヒータの温度を第２水分計により測定した前記シートたばこの水分量に基づき、前記シートたばこの水分量を仕上げ水分量に一致させるべくフィードバック制御によって制御する第１制御セクションと、
　前記第１水分計により測定した前記ベースウエブの水分量に基づき、前記第１及び第２ヒータにおける一方のヒータの温度をフィードフォワード制御及び定値制御の一方にて制御する第２制御セクションとを含む。 In addition, the present invention provides a manufacturing machine for performing the above manufacturing method,
A transport path for transporting a base web formed from tobacco material and to be sheet-fed;
A pre-dryer that is disposed in the transfer path, heats the base web with steam, and dries the base web;
A first moisture meter for measuring the moisture content of the base web after passing through the pre-dryer;
A moisture controller that controls the steam supplied to the pre-dryer based on the moisture content measured by the first moisture meter, and adjusts the moisture content of the base web to a target moisture content;
An applicator disposed on the transfer path, downstream of the pre-dryer, for applying a liquid perfume to the base web;
A post dryer that is disposed on the transfer path downstream of the coating device and forms the sheet tobacco by drying the base web, and is sequentially disposed from the upstream side along the transfer path. A post dryer including first to third heaters;
A second moisture meter for measuring the moisture content of the sheet tobacco after passing through the post dryer;
A drying controller for controlling the temperature of the first to third heaters based on the amount of moisture measured by the first and second moisture meters,
A first control section that controls the amount of moisture in the sheet cigarette based on the amount of moisture in the sheet cigarette measured by the second moisture meter with feedback control so that the amount of moisture in the sheet cigarette matches the finishing moisture amount. When,
A second control section that controls the temperature of one of the first and second heaters based on the moisture content of the base web measured by the first moisture meter by one of feedforward control and constant value control. .
　上述の製造方法及び製造機によれば、液状香料が塗布される前、ベースウエブの水分量は既に目標水分量に調整されているので、この後のベースウエブの乾燥処理は適切に実施され、シートたばこの仕上げ水分量を仕上げ水分量に正確に調整される。 According to the manufacturing method and the manufacturing machine described above, since the moisture content of the base web has already been adjusted to the target moisture content before the liquid flavor is applied, the subsequent drying process of the base web is appropriately performed, The finishing moisture amount of the sheet tobacco is accurately adjusted to the finishing moisture amount.
　また、ベースのウエブの乾燥処理を実施するに際し、第３ヒータの温度はシートたばこの水分量を仕上げ水分量に一致させるべくフィードバック制御され、一方、第１及び第２ヒータの一方のヒータの温度は液状香料が塗布される直前のシートたばこの水分量に基づきフィードフォワード制御又は定値制御される。 Further, when the base web is dried, the temperature of the third heater is feedback-controlled so that the moisture content of the sheet tobacco matches the finished moisture content, while the temperature of one of the first and second heaters is controlled. The feedforward control or the constant value control is performed based on the moisture content of the sheet tobacco immediately before the liquid flavor is applied.
　このようなフィードバック制御は、フィードフォワード制御又は定値制御と協働してベースウエブの乾燥処理を速やかに完了させる一方、シートたばこの水分量を仕上げ水分量に安定して維持する。 Such feedback control cooperates with feedforward control or constant value control to quickly complete the drying process of the base web, while stably maintaining the moisture content of the sheet tobacco at the final moisture content.
　具体的には、目標水分量へのベースウエブの水分量の調整及びフィードフォワード制御又は定値制御にはそれぞれ、同一の単波長型の光学式水分計が使用可能である。また、シートたばこの水分量の測定にも、同様な単波長型の光学式水分計が使用可能である。 Specifically, the same single-wavelength optical moisture meter can be used for adjusting the moisture content of the base web to the target moisture content and for feedforward control or constant value control. A similar single-wavelength optical moisture meter can also be used for measuring the moisture content of sheet tobacco.
　製造機に関し、具体的には、プレ乾燥機はヤンキー型乾燥機であって、移送経路の一部を形成する乾燥ドラムを含み、水分コントローラは、第１水分計にて測定された水分量に基づき、ヤンキー型乾燥機に供給される蒸気圧をＰＩ動作に従ってフィードバック制御する。一方、ポスト乾燥機は、第１～第３のヒータが内蔵された乾燥炉を更に含み、第１～第３のヒータのそれぞれは、複数の赤外線ヒータ素子を有する。 Regarding the manufacturing machine, specifically, the pre-dryer is a Yankee-type dryer and includes a drying drum that forms a part of the transfer path, and the moisture controller controls the moisture content measured by the first moisture meter. Based on this, the vapor pressure supplied to the Yankee dryer is feedback-controlled according to the PI operation. On the other hand, the post dryer further includes a drying furnace in which first to third heaters are built, and each of the first to third heaters has a plurality of infrared heater elements.
　更に、上述の製造方法及び製造機において、第２ヒータの温度がフィードフォワード制御される場合、第１ヒータの温度は、液状香料が塗布された後のベースウエブの吸光度を測定する成分計の測定結果に基づき、定値制御されるのが好ましい。 Further, in the above-described manufacturing method and machine, when the temperature of the second heater is feedforward controlled, the temperature of the first heater is measured by a component meter that measures the absorbance of the base web after the liquid fragrance is applied. Based on the result, it is preferable to perform constant value control.
　本発明のシートたばこの製造方法及び製造機は、液状香料が塗布される前にベースウエブの水分量を目標水分量に調整する一方、前記水分量に基づき、液状香料が塗布された後のベースのウエブの乾燥処理を制御するので、高品質のシートたばこの安定した製造が可能となる。 In the sheet tobacco manufacturing method and machine according to the present invention, the moisture content of the base web is adjusted to the target moisture content before the liquid flavor is applied, while the base after the liquid flavor is applied based on the moisture content. Since the web drying process is controlled, stable production of high-quality sheet tobacco becomes possible.
　また、本発明の他の目的や利点は、以下の添付の図面及び本発明の最良の形態の説明から明らかとなる。 Other objects and advantages of the present invention will be apparent from the following accompanying drawings and description of the best mode of the present invention.
本発明のシートたばこの製造方法を実施するための製造機を示す概略図である。It is the schematic which shows the manufacturing machine for enforcing the manufacturing method of the sheet tobacco of this invention. 図１の香料添加装置をより詳細に示す図である。It is a figure which shows the fragrance | flavor addition apparatus of FIG. 1 in detail. たばこ原料から抽出した液状香料（香料成分）及び水に関し、これらの吸光度スペクトルを対比して示すグラフである。It is a graph which contrasts these light absorption spectra regarding the liquid fragrance | flavor (fragrance | flavor component) extracted from the tobacco raw material, and water. 一対の塗布ローラ間のローラ間隙と加香比との関係、ローラ間隙と液状香料が塗布されたベースウエブの吸光度との関係をそれぞれ示すグラフである。It is a graph which shows the relationship between the roller gap | interval between a pair of application | coating rollers and an aroma ratio, and the relationship between the roller gap | interval and the light absorbency of the base web to which the liquid fragrance | flavor was apply | coated. ローラ間隙をパラメータとして吸光度と加香比との関係を表すマップの概略図である。It is the schematic of the map showing the relationship between a light absorbency and an aroma ratio with a roller gap as a parameter. 図１のポスト乾燥機をより詳細に示す図である。It is a figure which shows the post dryer of FIG. 1 in detail. ポトス乾燥制御によるベースウエブの水分量の変化を示したグラフである。It is the graph which showed the change of the moisture content of the base web by pothos dry control.
　図１を参照すれば、シートたばこのためのベースウエブＢＷは所定の移送経路に沿って移送される。ベースウエブＢＷは、前述したたばこ原料（中骨、刻たばこの細粉）、結合材及び補強材等から形成される。より詳しくは、先ず、たばこ原料は抽出処理を受け、この抽出処理にて、たばこ原料からたばこ成分、即ち、香料成分が抽出される。この結果、たばこ原料は香料成分を含む液状香料と、抽出後のたばこ原料、即ち、残留物とに分離される。このような残留物は叩解された後、結合材及び補強材とともに所定の濃度のスラリーに形成される。ベースウエブＢＷはスラリーから抄紙工程を経て形成され、このベースウエブＢＷは脱水及び乾燥の各処理を受けた後、本発明の製造方法を実施するシートたばこの製造機に供給される。 Referring to FIG. 1, the base web BW for the sheet cigarette is transferred along a predetermined transfer path. The base web BW is formed from the above-described tobacco material (medium bone, fine tobacco powder), a binder, a reinforcing material, and the like. More specifically, the tobacco raw material is first subjected to an extraction process, and in this extraction process, a tobacco component, that is, a fragrance component is extracted from the tobacco raw material. As a result, the tobacco raw material is separated into a liquid perfume containing a perfume component and a tobacco raw material after extraction, that is, a residue. After such a residue is beaten, it is formed into a slurry having a predetermined concentration together with the binder and the reinforcing material. The base web BW is formed from a slurry through a papermaking process. The base web BW is subjected to dehydration and drying treatments, and then supplied to a sheet cigarette manufacturing machine that implements the manufacturing method of the present invention.
　図１に示されるように製造機は、プレ乾燥機１０、液状香料の塗布装置２０及びポスト乾燥機３０を含み、これらプレ乾燥機１０、塗布装置２０及びポスト乾燥機３０は、ベースウエブＢＷの製造セクションの下流にて、移送経路に沿って配置されている。 As shown in FIG. 1, the manufacturing machine includes a pre-dryer 10, a liquid flavoring applicator 20, and a post-dryer 30, and the pre-dryer 10, the applicator 20, and the post-dryer 30 are included in the base web BW. Located downstream of the production section, along the transfer path.
　プレ乾燥機１０は回転型、所謂、ヤンキー型の乾燥機であり、乾燥ドラム１１を有する。この乾燥ドラム１１の外周面は移送経路の一部を形成する。それ故、乾燥ドラム１１の回転中、ベースウエブＢＷは乾燥ドラム１１の外周面に接触しながら移送される。乾燥ドラム１１には水蒸気供給経路が接続され、この水蒸気供給経路は乾燥ドラム１１内に水蒸気を供給し、この水蒸気は乾燥ドラム１１の外周面を所定の温度に加熱する。それ故、ベースウエブＢＷが乾燥ドラム１１を通過するとき、ベースウエブＢＷは乾燥され、ベースウエブＢＷの水分量は目標水分量に制御される。 The pre-dryer 10 is a rotary type, so-called Yankee type dryer, and has a drying drum 11. The outer peripheral surface of the drying drum 11 forms a part of the transfer path. Therefore, during rotation of the drying drum 11, the base web BW is transferred while being in contact with the outer peripheral surface of the drying drum 11. A water vapor supply path is connected to the drying drum 11, and the water vapor supply path supplies water vapor into the drying drum 11, and the water vapor heats the outer peripheral surface of the drying drum 11 to a predetermined temperature. Therefore, when the base web BW passes through the drying drum 11, the base web BW is dried, and the moisture content of the base web BW is controlled to the target moisture content.
　この制御のため、プレ乾燥機１０は水分コントローラ１２を含む。この水分コントローラ１２は、第１水分計１３、温度センサ１４、圧力計１５及び圧力制御弁１６に電気的に接続されている。第１水分計１３は、乾燥ドラム１１を通過した直後のベースウエブＢＷの水分量を測定し、この測定結果を水分コントローラ１２に供給する。なお、第１水分計１３は、例えば近赤外光を使用する単波長型（波長１４５０ｎｍ）の光学式水分計である。温度センサ１４は乾燥ドラム１１の外周面の温度を測定し、この測定結果を水分コントローラ１２に供給する。 For this control, the pre-dryer 10 includes a moisture controller 12. The moisture controller 12 is electrically connected to the first moisture meter 13, the temperature sensor 14, the pressure gauge 15, and the pressure control valve 16. The first moisture meter 13 measures the moisture content of the base web BW immediately after passing through the drying drum 11 and supplies the measurement result to the moisture controller 12. The first moisture meter 13 is a single wavelength type (wavelength 1450 nm) optical moisture meter using, for example, near infrared light. The temperature sensor 14 measures the temperature of the outer peripheral surface of the drying drum 11 and supplies the measurement result to the moisture controller 12.
　一方、圧力計１５及び圧力制御弁１６は水蒸気供給経路にそれぞれ配置されている。圧力計１５は圧力制御弁１６よりも下流に位置付けられ、乾燥ドラム１１に供給される水蒸気の圧力を測定し、この測定結果を水分コントローラ１２に供給する。 On the other hand, the pressure gauge 15 and the pressure control valve 16 are respectively disposed in the water vapor supply path. The pressure gauge 15 is positioned downstream of the pressure control valve 16, measures the pressure of water vapor supplied to the drying drum 11, and supplies the measurement result to the moisture controller 12.
　水分コントローラ１２は、第１水分計１３、温度センサ１４及び圧力計１５から供給される測定結果、即ち、３つの制御パラメータに基づき、乾燥ドラム１１を通過した後のベースウエブＢＷの水分量が目標水分量（例えば、４５重量％）となるように、圧力制御弁１６の弁開度をフィードバック制御する。 The moisture controller 12 targets the moisture content of the base web BW after passing through the drying drum 11 based on the measurement results supplied from the first moisture meter 13, the temperature sensor 14 and the pressure gauge 15, that is, three control parameters. The valve opening degree of the pressure control valve 16 is feedback-controlled so that the water content (for example, 45% by weight) is obtained.
　詳しくは、水分コントローラ１２は、乾燥ドラム１１に供給される水蒸気の圧力と乾燥ドラム１１の外周面の温度との間の相関関係や、水蒸気の圧力変化が乾燥ドラム１１の外周面の温度変化に現れるまでの応答性を考慮し、乾燥ドラム１１の乾燥温度を決定する圧力制御弁１６の弁開度をＰＩ制御に基づいて変化させる。この結果、プレ乾燥機１０を通過したベースウエブＢＷはその水分量が目標水分量に維持された状態で、塗布装置２０に供給される。 Specifically, the moisture controller 12 determines the correlation between the pressure of the water vapor supplied to the drying drum 11 and the temperature of the outer peripheral surface of the drying drum 11, and the change in the pressure of the water vapor changes the temperature of the outer peripheral surface of the drying drum 11. In consideration of the response until it appears, the valve opening degree of the pressure control valve 16 that determines the drying temperature of the drying drum 11 is changed based on the PI control. As a result, the base web BW that has passed through the pre-dryer 10 is supplied to the coating device 20 in a state in which the water content is maintained at the target water content.
　図１から明らかなように塗布装置２０はプレ乾燥機１０の下流に配置され、一対の塗布ローラ２１ａ,２１ｂを含む。これら塗布ローラ２１ａ,２１ｂはモータ（図示しない）により一定の速度（周速）で回転可能である。塗布ローラ２１ａ,２１ｂが回転されているとき、ベースウエブＢＷは塗布ローラ２１ａ,２１ｂ間を上方から下方に向けて通過する。一方、塗布ローラ２１ａ,２１ｂ間には前述した液状香料が徐放から供給され、この液状香料はベースウエブＢＷが塗布ローラ２１ａ,２１ｂ間を通過する際、ベースウエブＢＷの一方の面に塗布される。 As is clear from FIG. 1, the coating device 20 is disposed downstream of the pre-dryer 10 and includes a pair of coating rollers 21a and 21b. These application rollers 21a and 21b can be rotated at a constant speed (circumferential speed) by a motor (not shown). When the coating rollers 21a and 21b are rotating, the base web BW passes between the coating rollers 21a and 21b from the top to the bottom. On the other hand, the liquid fragrance described above is supplied between the application rollers 21a and 21b from the sustained release, and this liquid fragrance is applied to one surface of the base web BW when the base web BW passes between the application rollers 21a and 21b. The
　ベースウエブＢＷへの液状香料の塗布量は一対の塗布ローラ２１ａ,２１ｂ間のローラ間隙によって決定される。具体的には、塗布量はローラ間隙の増減に従って増減する。それ故、塗布装置２０はローラ間隙を調整する調整機構２２を含み、この調整機構２２は塗布量の調整を可能にする。 The amount of liquid flavor applied to the base web BW is determined by the gap between the pair of application rollers 21a and 21b. Specifically, the coating amount increases and decreases according to the increase and decrease of the roller gap. Therefore, the coating device 20 includes an adjustment mechanism 22 that adjusts the roller gap, and this adjustment mechanism 22 enables adjustment of the coating amount.
　図２は、調整機構２２の詳細を示す。
　先ず、塗布ローラ２１ａは一対の支持脚２７の上端に回転可能に支持され、これら支持脚２７は基台２１ｃ上に固定されている。一方、塗布ローラ２１ｂは一対の支持脚２８の上端に回転可能に支持され、これら支持脚２８はスライダ２１ｄを介して基台２１ｃ上に支持されている。このスライダ２１ｄは基台２１ｃ上を塗布ローラ２１ａに近接する方向及び塗布ローラ２１ａから離れる方向に移動可能であり、このようなスライダ２１ｄの移動は、塗布ローラ２１ａ,２１ｂ間の間隙を調整可能にする。 FIG. 2 shows details of the adjustment mechanism 22.
First, the application roller 21a is rotatably supported on the upper ends of the pair of support legs 27, and these support legs 27 are fixed on the base 21c. On the other hand, the application roller 21b is rotatably supported on the upper ends of a pair of support legs 28, and these support legs 28 are supported on a base 21c via a slider 21d. The slider 21d is movable on the base 21c in a direction close to the application roller 21a and away from the application roller 21a. Such movement of the slider 21d makes it possible to adjust a gap between the application rollers 21a and 21b. To do.
　より詳しくは、スライダ２１ｄは、塗布ローラ２１ａ側に位置付けられた一端及び塗布ローラ２１ａから遠く離れた他端を有する。スライダ２１ｄの一端及び支持脚２７はスプリング２１ｇによって連結され、このスプリング２１ｇは塗布ローラ２１ａからスライダ２１ｄが離れる方向にスライダ２１ｄを押し付けている。 More specifically, the slider 21d has one end positioned on the application roller 21a side and the other end far from the application roller 21a. One end of the slider 21d and the support leg 27 are connected by a spring 21g, and the spring 21g presses the slider 21d in a direction in which the slider 21d is separated from the application roller 21a.
　一方、スライダ２１ｄの他端には楔ユニット２１ｆが配置され、この楔ユニット２１ｆはスライダ２１ｄの他端に連結された固定楔４０と、この固定楔４０に摺接する可動楔４１とを含む。可動楔４１からはロッド部材２１ｅが延び、このロッド部材２１ｅは例えば圧縮空気型のアクチュエータ２５に連結されている。このアクチュエータ２５はロッド部材２１ｅを介して可動楔４１を図２でみて上下に移動させることができる。今、可動楔４１が下降されたとき、可動楔２１はスプリング２１ｇの押し付け力に抗して、固定楔４０、即ち、スライダ２１ｄを塗布ローラ２１ａに向けて移動させ、この結果、前述したローラ間隙は減少される。これに対し、可動楔４１が上昇されたとき、スプリング２１ｇはスライダ２１ｄを塗布ローラ２１ａから離れる方向に押し戻し、この結果、ローラ間隙は増加される。 On the other hand, a wedge unit 21f is disposed at the other end of the slider 21d. The wedge unit 21f includes a fixed wedge 40 connected to the other end of the slider 21d and a movable wedge 41 slidably contacting the fixed wedge 40. A rod member 21e extends from the movable wedge 41, and this rod member 21e is connected to a compressed air type actuator 25, for example. The actuator 25 can move the movable wedge 41 up and down through the rod member 21e as seen in FIG. Now, when the movable wedge 41 is lowered, the movable wedge 21 moves the fixed wedge 40, that is, the slider 21d toward the application roller 21a against the pressing force of the spring 21g. Is reduced. On the other hand, when the movable wedge 41 is raised, the spring 21g pushes back the slider 21d in the direction away from the application roller 21a, and as a result, the roller gap is increased.
　なお、圧縮空気型のアクチュエータ２５に代えて、油圧型又は電動型のアクチュエータを使用することも可能である。また、前述した楔ユニット２１ｆに代えて、いわゆるジャッキ式の昇降機構を使用することも可能である。 It should be noted that a hydraulic or electric actuator can be used in place of the compressed air actuator 25. Further, a so-called jack type lifting mechanism can be used instead of the wedge unit 21f described above.
　前述したローラ間隙を調節するため、アクチュエータ２５の作動は間隙コントローラ４３によって制御される。この間隙コントローラ４３は、制御セクション４４を含み、この制御セクション４４は間隙センサ２４及び成分計としての第２水分計２３に電気的に接続されている。 The operation of the actuator 25 is controlled by the gap controller 43 in order to adjust the roller gap described above. The gap controller 43 includes a control section 44, which is electrically connected to the gap sensor 24 and the second moisture meter 23 as a component meter.
　間隙センサ２４はローラ間隙を測定し、この測定結果を制御セクション４４に供給する。一方、図１から明らかなように第２水分計２３は、一対の塗布ローラ２１ａ,２１ｂの直下流に配置され、液状香料が塗布されたベースウエブＢＷの吸光度を測定し、この測定結果を制御セクション４４に供給する。なお、第２水分計２３は前述した第１水分計１３と同様に、近赤外光を使用する単波長型（波長１４５０ｎｍ）の光学式水分計である。 The gap sensor 24 measures the roller gap and supplies the measurement result to the control section 44. On the other hand, as is apparent from FIG. 1, the second moisture meter 23 is arranged immediately downstream of the pair of application rollers 21a and 21b, measures the absorbance of the base web BW coated with the liquid fragrance, and controls this measurement result. Feed to section 44. The second moisture meter 23 is a single-wavelength type (wavelength 1450 nm) optical moisture meter that uses near-infrared light, like the first moisture meter 13 described above.
　この種の光学式水分計は、測定対象物の吸光度に基づき、測定対象物に含まれる水分量を測定する。しかしながら、液状香料の香料成分は、ニコチンや糖等を含む茶褐色の可溶成分であるが、一般的に、液状香料の水分量（吸光度）と液状香料に含まれる香料成分の量との間の相関性は低い。しかも、図３から明らかなように、液状香料（香料成分）の吸光度のスペクトルと水の吸光度スペクトルとは同様な傾向を示す。 This type of optical moisture meter measures the amount of water contained in the measurement object based on the absorbance of the measurement object. However, the fragrance component of the liquid fragrance is a brownish brown soluble component containing nicotine, sugar, etc., but generally between the amount of moisture (absorbance) of the liquid fragrance and the amount of the fragrance component contained in the liquid fragrance. Correlation is low. Moreover, as is clear from FIG. 3, the absorbance spectrum of the liquid fragrance (fragrance component) and the absorbance spectrum of water show the same tendency.
　それ故、例えば、ベースウエブＢＷの吸光度（波長１９２０ｎｍ）が水分計により測定されても、この測定結果がベースウエブＢＷの水分量を示すものか、又は、液状香料（香料成分）の量を示すものかの識別は困難である。換言すれば、第２水分計２３によって測定されたベースウエブＢＷの吸光度に基づき、液状香料の塗布量を直接的に求めることはできない。 Therefore, for example, even if the absorbance (wavelength 1920 nm) of the base web BW is measured by a moisture meter, this measurement result indicates the amount of moisture in the base web BW or the amount of liquid flavor (fragrance component). It is difficult to identify things. In other words, based on the absorbance of the base web BW measured by the second moisture meter 23, the application amount of the liquid fragrance cannot be obtained directly.
　しかしながら、本発明者は、ベースウエブＢＷの水分量が一定であれば、前述したローラ間隙と第２水分計２３にて得られた吸光度（波長１４５０ｎｍ）との間、また、ローラ間隙と加香比との間に図４に示されるような線形な関係が存在することを見出した。 However, the present inventor, if the water content of the base web BW is constant, between the roller gap described above and the absorbance (wavelength 1450 nm) obtained by the second moisture meter 23, or between the roller gap and the scented It was found that there is a linear relationship between the ratio and the ratio as shown in FIG.
　前述したように加香比は、単位面積当たりのベースウエブＢＷに塗布された香料成分の重量（塗布量）をＡ、上記単位面積当たりのベースウエブＢＷの重量をＢとしたとき、次式により算出される。
　加香比＝Ａ／（Ａ＋Ｂ） As described above, the aroma ratio is expressed by the following equation, where A is the weight of the fragrance component applied to the base web BW per unit area (application amount), and B is the weight of the base web BW per unit area. Calculated.
Aroma ratio = A / (A + B)
　また、香料成分の重量Ａに関しては、香料成分が専ら糖質であることに着目し、糖度計を使用して単位面積当たりのベースウエブＢＷの糖度を測定すれば、この測定して糖度に基づき、香料成分の重量Ａを算出可能である。 Regarding the weight A of the fragrance component, paying attention to the fact that the fragrance component is exclusively saccharide, and measuring the sugar content of the base web BW per unit area using a saccharimeter, this measurement is based on the sugar content. The weight A of the fragrance component can be calculated.
　更に、ローラ間隙と吸光度との間、また、ローラ間隙と香料成分の塗布量との間にそれぞれ線形の関係が存在すれば、吸光度と香料成分の塗布量（加香比）との間にも線形な関係が存在することになる。 Furthermore, if there is a linear relationship between the roller gap and the absorbance, and between the roller gap and the amount of the fragrance component, the difference between the absorbance and the amount of the fragrance component (aroma ratio) There will be a linear relationship.
　それ故、図５に示されるように、ローラ間隙Ｇをパラメータとして吸光度と加香比との関係を示すマップが予め準備され、このマップは間隙コントローラ４３の記憶セクション２６に記憶されている。 Therefore, as shown in FIG. 5, a map showing the relationship between the absorbance and the aroma ratio with the roller gap G as a parameter is prepared in advance, and this map is stored in the storage section 26 of the gap controller 43.
　ベースウエブＢＷの吸光度が第２水分計２３によって測定され、この測定結果が間隙センサ２４により測定されたローラ間隙Ｇとともに間隙コントローラ４３の制御セクション４４に供給されたとき、制御セクション４４はローラ間隙Ｇ及び吸光度に基づき、マップから加香比を読み出す。そして、読み出した加香比が目標加香比に一致していない場合、制御セクション４４は、目標加香比に対応する目標間隙にローラ間隙Ｇを一致させるべく、前述したアクチュエータ２５の作動をフィードバック制御し、ベースウエブＢＷへの香料成分の塗布量、即ち、加香比を目標加香比に維持する。 When the absorbance of the base web BW is measured by the second moisture meter 23 and the measurement result is supplied to the control section 44 of the gap controller 43 together with the roller gap G measured by the gap sensor 24, the control section 44 is in contact with the roller gap G. Based on the absorbance, the aroma ratio is read from the map. If the read aroma ratio does not match the target aroma ratio, the control section 44 feeds back the operation of the actuator 25 described above so that the roller gap G matches the target gap corresponding to the target aroma ratio. The amount of the fragrance component applied to the base web BW, that is, the scent ratio is maintained at the target scent ratio.
　このようなフィードバック制御は、第２水分計２３にて測定されたベースウエブＢＷの吸光度に基づいて実行されるので、フィードバック制御が複雑化することはなく、ベースウエブＢＷの加香比を目標加香比に安定して維持可能となる。 Since such feedback control is executed based on the absorbance of the base web BW measured by the second moisture meter 23, the feedback control is not complicated, and the scent ratio of the base web BW is set as the target addition. It becomes possible to maintain a stable incense ratio.
　この後、ベースウエブＢＷはポスト乾燥機３０に向けて移送される。
　図１に示されているようにポスト乾燥機３０はコンベア３１を含む。このコンベア３１は塗布装置２０から供給されるベースウエブＢＷを受け取り、そして、受け取ったベースウエブＢＷを前述した移送経路に沿って移送する。 Thereafter, the base web BW is transferred toward the post dryer 30.
As shown in FIG. 1, the post dryer 30 includes a conveyor 31. The conveyor 31 receives the base web BW supplied from the coating device 20, and transfers the received base web BW along the transfer path described above.
　コンベア３１は乾燥炉５０を通過しており、この乾燥炉５０は移送経路に沿い、例えば、５～６ｍの長さを有する。乾燥炉５０内には第１～第３ヒータＨ１,Ｈ２,Ｈ３が移送経路の上流側から順次配置されている。即ち、第１～第３のヒータＨ１,Ｈ２,Ｈ３は前記乾燥炉５０内の上流領域、中流流域及び下流領域にそれぞれ分けて配置され、対応する領域の温度を個別に加熱する。具体的には、図６に示されているように、各ヒータＨは、例えば３本の赤外線ヒータ素子３２と、電源Ｖとを含み、これら赤外線ヒータ素子３２は電源Ｖに対し、並列に接続されている。 The conveyor 31 passes through the drying furnace 50, and the drying furnace 50 has a length of, for example, 5 to 6 m along the transfer path. In the drying furnace 50, first to third heaters H1, H2, and H3 are sequentially arranged from the upstream side of the transfer path. That is, the first to third heaters H1, H2, and H3 are arranged separately in the upstream region, the middle flow region, and the downstream region in the drying furnace 50, and individually heat the temperatures of the corresponding regions. Specifically, as shown in FIG. 6, each heater H includes, for example, three infrared heater elements 32 and a power supply V. These infrared heater elements 32 are connected in parallel to the power supply V. Has been.
　なお、乾燥炉５０は第１～第３ヒータＨ１,Ｈ２,Ｈ３とは別に、温風又は熱風の発生源（図示しない）を含んでいる。この発生源は乾燥炉５０内を通過する温風又は熱風の流れを生起し、乾燥炉５０内の温度を全体的に所定の高温に維持する。 The drying furnace 50 includes a source of hot air or hot air (not shown) separately from the first to third heaters H1, H2, and H3. The generation source generates a flow of hot air or hot air passing through the drying furnace 50, and maintains the temperature in the drying furnace 50 at a predetermined high temperature as a whole.
　一方、ポスト乾燥機３０は乾燥コントローラ５２を含み、この乾燥コントローラ５２は第１～第３ヒータＨ１,Ｈ２,Ｈ３の発熱温度を個別に制御する。詳しくは、乾燥コントローラ５２は、定値制御セクション３３ａ、ＦＦ制御セクション３３ｂ及びＦＢ制御セクション３３ｃを有し、これら制御セクション３３ａ,３３ｂ,３３ｃは、第１～第３ヒータＨ１,Ｈ２,Ｈ３の電源Ｖにそれぞれ接続されている。 On the other hand, the post dryer 30 includes a drying controller 52, which individually controls the heat generation temperatures of the first to third heaters H1, H2, and H3. Specifically, the drying controller 52 includes a constant value control section 33a, an FF control section 33b, and an FB control section 33c. These control sections 33a, 33b, and 33c are power sources V of the first to third heaters H1, H2, and H3. Are connected to each.
　また、乾燥炉５０内には第１～第３ヒータＨ１,Ｈ２,Ｈ３の温度（発熱温度）をそれぞれ検出する温度センサ３４ａ,３４ｂ,３４ｃが配置され、これら温度センサ３４ａ,３４ｂ,３４ｃは定値制御セクション３３ａ、ＦＦ制御セクション３３ｂ及びＦＢ制御セクション３３ｃにそれぞれ接続されている。 Further, temperature sensors 34a, 34b, 34c for detecting the temperatures (heat generation temperatures) of the first to third heaters H1, H2, H3 are arranged in the drying furnace 50, and these temperature sensors 34a, 34b, 34c are constant values. The control section 33a, the FF control section 33b, and the FB control section 33c are connected to each other.
　更に、定値制御セクション３３ａには第２水分計２３が接続され、ＦＦ制御セクション３３ｂには第１水分計１３が接続されている。 Furthermore, the second moisture meter 23 is connected to the constant value control section 33a, and the first moisture meter 13 is connected to the FF control section 33b.
　図１に示されているように乾燥炉５０外には、乾燥炉５０の出口近傍に第３水分計５３が配置されている。この第３水分計５３は、乾燥炉５０から搬出されたベースウエブＢＷ、即ち、完成されたシートたばこの水分量を測定し、この測定結果をＦＢ制御セクション３３ｃに供給する。第３水分計５３は多波長型（波長１９２０ｎｍを含む）の光学式水分計である。 As shown in FIG. 1, a third moisture meter 53 is disposed outside the drying furnace 50 in the vicinity of the outlet of the drying furnace 50. The third moisture meter 53 measures the moisture content of the base web BW carried out from the drying furnace 50, that is, the completed sheet tobacco, and supplies the measurement result to the FB control section 33c. The third moisture meter 53 is a multi-wavelength type (including a wavelength of 1920 nm) optical moisture meter.
　次に、上述した乾燥コントローラ５２にて実施される乾燥炉５０内の温度制御、即ち、ベースウエブＢＷの乾燥制御について説明する。 Next, temperature control in the drying furnace 50 performed by the above-described drying controller 52, that is, drying control of the base web BW will be described.
　乾燥コントローラ５２は基本的に、第３水分計３３によって測定したシートたばこの水分量に基づき、乾燥炉５０内の加熱温度（乾燥温度）をフィードバック制御し、完成したシートたばこの仕上げ水分量を例えば１２重量％に調整する。 The drying controller 52 basically feedback-controls the heating temperature (drying temperature) in the drying furnace 50 based on the moisture content of the sheet tobacco measured by the third moisture meter 33, and determines the finished moisture content of the completed sheet tobacco, for example. Adjust to 12 wt%.
　乾燥炉５０によるベースウエブＢＷのポスト乾燥制御（温度）、プレ乾燥機１０によるベースウエブＢＷのプレ乾燥制御（水分量）、そして、塗布装置２０による液状香料の塗布制御（塗布量）は互いに制御対象が全く相違しているため、これらポスト乾燥制御、プレ乾燥制御及び塗布制御の制御応答性に差が生じるのは避けられない。 The post drying control (temperature) of the base web BW by the drying furnace 50, the predrying control (water content) of the base web BW by the predryer 10, and the liquid flavor application control (application amount) by the coating apparatus 20 are mutually controlled. Since the objects are completely different, it is inevitable that differences occur in the control responsiveness of these post-drying control, pre-drying control and coating control.
　それ故、ポスト乾燥制御が実行されるとき、プレ乾燥制御及び塗布制御の実行によって変化するベースウエブＢＷの温度及び水分量が外乱要因として加わるので、このような外乱要因はポスト乾燥制御を有効に機能させなくし、この結果、シートたばこの最終的な仕上げ水分量が安定しなくなる虞がある。 Therefore, when post-drying control is executed, the temperature and moisture content of the base web BW, which change due to the execution of pre-drying control and coating control, are added as disturbance factors. If the function is not performed, the final finishing moisture content of the sheet tobacco may not be stabilized.
　それ故、乾燥コントローラ５２は先ず、第１及び第２ヒータＨ１，Ｈ２を使用して、前述した外乱要因を相殺するための乾燥炉５０内の温度制御を実行し、この後、第３ヒータＨ３を使用して、シートたばこの最終的な仕上げ水分量を目標値に一致させるための乾燥炉５０内の温度制御を実行する。 Therefore, the drying controller 52 first uses the first and second heaters H1 and H2 to perform temperature control in the drying furnace 50 for canceling the disturbance factors described above, and thereafter, the third heater H3. Is used to control the temperature in the drying furnace 50 so that the final finishing moisture content of the sheet tobacco matches the target value.
　具体的には、塗布制御の制御応答性は、プレ乾燥制御及びポスト乾燥制御の制御応答性に比べて速い。それ故、乾燥コントローラ５２の定値制御セクション３３ａは、第２水分計２３にて測定したベースウエブＢＷの吸光度（加香比）に基づき、第１ヒーＨ１の温度を定値制御する。このような定値制御は、液状香料の塗布によって発生するベースウエブＢＷの水分量の変動に起因した外乱要因を相殺する。 Specifically, the control response of application control is faster than the control response of pre-dry control and post-dry control. Therefore, the constant value control section 33a of the drying controller 52 controls the temperature of the first heat H1 at a constant value based on the absorbance (addition ratio) of the base web BW measured by the second moisture meter 23. Such constant-value control cancels out disturbance factors caused by fluctuations in the moisture content of the base web BW generated by the application of the liquid fragrance.
　一方、プレ乾燥制御の制御応答性はポスト乾燥制御の制御応答性に比べて遙かに遅い。それ故、乾燥コントローラ５２のＦＦ制御セクション３３ｂは、第１水分計１３にて測定されたベースウエブＢＷに基づき、第１ヒータＨ１の温度をフィードフォワード制御する。このようなフィードフォワード制御は、プレ乾燥制御の応答遅れによって発生する目標水分量からのベースウエブＢＷの水分量のずれに起因した外乱要因を相殺する。 On the other hand, the control response of pre-drying control is much slower than the control response of post-drying control. Therefore, the FF control section 33b of the drying controller 52 performs feedforward control of the temperature of the first heater H1 based on the base web BW measured by the first moisture meter 13. Such feedforward control cancels the disturbance factor caused by the deviation of the moisture content of the base web BW from the target moisture content generated by the response delay of the predrying control.
　ポスト乾燥制御に関し、第３ヒータＨ３の温度によって決定されるベースウエブＢＷの乾燥処理温度は、シートたばこの仕上げ水分量に直接的に大きく影響する。それ故、乾燥コントローラ５２のＦＢ制御セクション３３ｃは、第３水分計３３にて測定されたシートたばこの水分量に応じて、第３ヒータＨ３の温度をフィードバック制御する。 Regarding the post-drying control, the drying temperature of the base web BW determined by the temperature of the third heater H3 directly greatly affects the finishing moisture amount of the sheet tobacco. Therefore, the FB control section 33c of the drying controller 52 feedback-controls the temperature of the third heater H3 according to the moisture content of the sheet tobacco measured by the third moisture meter 33.
　前述したようにフィードバック制御によるベースウエブＢＷの乾燥処理が実行されるとき、ベースウエブＢＷは定値制御及びフィードフォワード制御による乾燥処理を既に受けている。それ故、フィードバック制御は、前述の外乱要因が既に抑制された状態にて実行されることなり、シートたばこの仕上げ水分量をその目標水分量に安定して維持することができる。 As described above, when the drying process of the base web BW by the feedback control is executed, the base web BW has already undergone the drying process by the constant value control and the feedforward control. Therefore, the feedback control is executed in a state where the above-described disturbance factor is already suppressed, and the finishing moisture amount of the sheet tobacco can be stably maintained at the target moisture amount.
　図７は、前述したポスト乾燥制御の開始後におけるベースウエブＢＷの水分量の変化を示している。図７から明らかなように、ベースウエブＢＷの水分量はポスト乾燥制御の開始から約３０分経過した時点で仕上げ水分量に達する。 FIG. 7 shows a change in the moisture content of the base web BW after the start of the post-drying control described above. As is apparent from FIG. 7, the moisture content of the base web BW reaches the finished moisture content when about 30 minutes have elapsed from the start of the post-drying control.
　この結果、本発明の製造機は、加香比及び仕上げ水分量をそれぞれ目標値に維持した高品質のシートたばこを速やかに製造することができる。 As a result, the production machine of the present invention can quickly produce high-quality sheet tobacco in which the scent ratio and the finished moisture content are maintained at the target values, respectively.
　また、ポスト乾燥制御の実行に際し、第１及び第２水分計１３，２３が使用されているで、ポスト乾燥制御のために新たなセンサ等を付加する必要はない。 Also, since the first and second moisture meters 13 and 23 are used when the post drying control is executed, it is not necessary to add a new sensor or the like for the post drying control.
　本発明は上述した実施例に限定されるものではない。
　例えば、乾燥コントローラ５２は、第１水分計１３の出力に基づいて第１ヒータＨ１の温度をフィードフォワード制御し、第２水分計２３の出力に基づいて第２ヒータＨ２の温度を定値制御することもできる（図１中の破線参照）。 The present invention is not limited to the embodiments described above.
For example, the drying controller 52 performs feedforward control of the temperature of the first heater H1 based on the output of the first moisture meter 13, and performs constant value control of the temperature of the second heater H2 based on the output of the second moisture meter 23. (See the broken line in FIG. 1).
　また、乾燥コントローラ５２は、第１及び第２ヒータＨ１，Ｈ２の温度に関し、第１水分計１３の出力に基づくフィードフォワード制御及び第２水分計２３の出力に基づく定値制御を同時に実行することが可能である。 Further, the drying controller 52 can simultaneously perform feedforward control based on the output of the first moisture meter 13 and constant value control based on the output of the second moisture meter 23 with respect to the temperatures of the first and second heaters H1 and H2. Is possible.
　１０　プレ乾燥機
　１２　水分コントローラ
　１３　第１水分計
　２０　塗布装置
　２１ａ,２１ｂ　塗布ローラ
　２２　調整機構
　２３　第２水分計
　２６　記憶セクション（マップ）
　３０　ポスト乾燥機（後乾燥工程）
　３３ａ　定値制御セクション
　３３ｂ　ＦＦ制御セクション
　３３ｃ　ＦＢ制御セクション
　４４　間隙コントローラ
　５０　乾燥炉
　５２　乾燥コントローラ
　５３　第３水分計
　Ｈ１,Ｈ２,Ｈ３　ヒータ
  DESCRIPTION OF SYMBOLS 10 Pre-dryer 12 Moisture controller 13 1st moisture meter 20 Application apparatus 21a, 21b Application roller 22 Adjustment mechanism 23 2nd moisture meter 26 Storage section (map)
30 Post dryer (post-drying process)
33a Fixed value control section 33b FF control section 33c FB control section 44 Gap controller 50 Drying furnace 52 Drying controller 53 Third moisture meter H1, H2, H3 Heater

Claims (8)

  1. 　たばこ原料から形成され且つシートたばことなるべきベースウエブを所定の移送経路に沿って移送し、
    　前記ベースウエブの移送過程にて、前記ベースウエブの水分量を目標水分量に調整し、
    　前記ベースウエブに液状香料を塗布し、
    　この後、前記移送経路に沿って上流側から順次配置された第１～第３ヒータにより前記ベースウエブを乾燥処理してシートたばこに形成し、
    　前記ベースウエブの乾燥処理は、
    　最も下流に位置する第３ヒータの温度を前記シートたばこの水分量に基づき、前記シートたばこの水分量を仕上げ水分量に一致させるべくフィードバック制御によって制御する第１プロセスと、
    　前記液状香料が塗布される前の前記ベースウエブの水分量に基づき、前記第１及び第２ヒータにおける一方のヒータの温度をフィードフォワード制御及び定値制御の一方にて制御する第２プロセスとを含む、
    ことを特徴とするシートたばこの製造方法。     A base web that is formed from tobacco raw material and should be a sheet tobacco is transferred along a predetermined transfer path,
    In the process of transferring the base web, the moisture content of the base web is adjusted to a target moisture content,
    Applying liquid fragrance to the base web,
    Thereafter, the base web is dried by first to third heaters arranged sequentially from the upstream side along the transfer path to form a sheet tobacco,
    The drying process of the base web is as follows:
    A first process for controlling the temperature of the third heater located on the most downstream side based on the moisture content of the sheet tobacco and controlling the moisture content of the sheet tobacco by feedback control so as to match the moisture content of the sheet tobacco;
    And a second process for controlling the temperature of one of the first and second heaters by one of feedforward control and constant value control based on the moisture content of the base web before the liquid flavor is applied. ,
    The manufacturing method of the sheet tobacco characterized by the above-mentioned.
  2. 　前記目標水分量へのベースウエブの水分量の調整及び前記フィードフォワード制御又は前記定値制御にはそれぞれ、同一の単波長型の光学式水分計が使用されることを特徴とする請求項１に記載のシートたばこの製造方法。 The same single-wavelength optical moisture meter is used for adjusting the moisture content of the base web to the target moisture content, and for the feedforward control or the constant value control, respectively. Sheet cigarette manufacturing method.
  3. 　前記第２ヒータの温度はフィードフォワード制御され、
    　前記第１ヒータの温度は、前記液状香料が塗布された後の前記ベースウエブの吸光度を測定する成分計の測定結果に基づき、定値制御されることを特徴とする請求項１に記載のシートたばこの製造方法。     The temperature of the second heater is feedforward controlled,
    The sheet tobacco according to claim 1, wherein the temperature of the first heater is controlled to a constant value based on a measurement result of a component meter that measures the absorbance of the base web after the liquid flavor is applied. Manufacturing method.
  4. 　たばこ原料から形成され且つシートたばことなるべきベースウエブを移送する移送経路と、
    　前記移送経路に配置され、前記ベースウエブを蒸気により加熱し、前記ベースウエブを乾燥させるプレ乾燥機と、
    　前記プレ乾燥機を通過した後の前記ベースウエブの水分量を測定する第１水分計と、
    　前記第１水分計にて測定した水分量に基づき、前記プレ乾燥機に供給される蒸気を制御し、前記ベースウエブの水分量を目標水分量に調整する水分コントローラと、
    　前記移送経路に前記プレ乾燥機の下流に位置して配置され、前記ベースウエブに液状香料を塗布する塗布装置と、
    　前記移送経路に前記塗布装置の下流に位置して配置され、前記ベースウエブを乾燥処理してシートたばこに形成するポスト乾燥機であって、前記移送経路に沿って上流側から順次配置された第１～第３ヒータを含む、ポスト乾燥機と、
    　前記ポスト乾燥機を通過した後のシートたばこの水分量を測定する第２水分計と、
    　前記第１及び第２水分計にて測定した水分量に基づき、前記第１～第３ヒータの温度を制御する乾燥コントローラであって、
    　最も下流に位置する第３ヒータの温度を第２水分計により測定した前記シートたばこの水分量に基づき、前記シートたばこの水分量を仕上げ水分量に一致させるべくフィードバック制御によって制御する第１制御セクションと、
    　前記第１水分計により測定した前記ベースウエブの水分量に基づき、前記第１及び第２ヒータにおける一方のヒータの温度をフィードフォワード制御及び定値制御の一方によって制御する第２制御セクションとを含む、
    ことを特徴とするシートたばこの製造機。     A transport path for transporting a base web formed from tobacco material and to be sheet-fed;
    A pre-dryer that is disposed in the transfer path, heats the base web with steam, and dries the base web;
    A first moisture meter for measuring the moisture content of the base web after passing through the pre-dryer;
    A moisture controller that controls the steam supplied to the pre-dryer based on the moisture content measured by the first moisture meter, and adjusts the moisture content of the base web to a target moisture content;
    An applicator disposed on the transfer path, downstream of the pre-dryer, for applying a liquid perfume to the base web;
    A post dryer that is disposed on the transfer path downstream of the coating device and forms the sheet tobacco by drying the base web, and is sequentially arranged from the upstream side along the transfer path. A post dryer including first to third heaters;
    A second moisture meter for measuring the moisture content of the sheet tobacco after passing through the post dryer;
    A drying controller for controlling the temperature of the first to third heaters based on the amount of water measured by the first and second moisture meters,
    A first control section that controls the amount of moisture in the sheet cigarette based on the amount of moisture in the sheet cigarette measured by the second moisture meter with feedback control so that the amount of moisture in the sheet cigarette matches the finishing moisture amount. When,
    A second control section for controlling the temperature of one of the first and second heaters by one of feedforward control and constant value control based on the moisture content of the base web measured by the first moisture meter.
    Sheet cigarette making machine characterized by that.
  5. 　前記第１及び第２水分計は、それぞれ単波長型の光学式水分計であることを特徴とする請求項４に記載のシートたばこの製造機。 The sheet tobacco manufacturing machine according to claim 4, wherein each of the first and second moisture meters is a single wavelength type optical moisture meter.
  6. 　前記プレ乾燥機はヤンキー型乾燥機であって、前記移送経路の一部を形成する乾燥ドラムを含み、
    　前記水分コントローラは、前記第１水分計にて測定された水分量に基づき、前記ヤンキー型乾燥機に供給される蒸気圧をＰＩ動作に従ってフィードバック制御することを特徴とする請求項５に記載のシートたばこの製造機。     The pre-dryer is a Yankee-type dryer, and includes a drying drum that forms a part of the transfer path,
    6. The seat according to claim 5, wherein the moisture controller feedback-controls the vapor pressure supplied to the Yankee-type dryer based on a moisture content measured by the first moisture meter in accordance with a PI operation. Cigarette making machine.
  7. 　前記ポスト乾燥機は、前記第１～第３のヒータが内蔵された乾燥炉を更に含み、
    　前記第１～第３のヒータのそれぞれは、複数の赤外線ヒータ素子を有することを特徴とする請求項６に記載のシートたばこの製造機。     The post dryer further includes a drying furnace in which the first to third heaters are incorporated,
    The sheet tobacco manufacturing machine according to claim 6, wherein each of the first to third heaters includes a plurality of infrared heater elements.
  8. 　前記第２制御セクションは、前記第２ヒータの温度をフィードフォワード制御する一方、前記液状香料が塗布された後の前記ベースウエブの吸光度を測定する成分計を更に含み、そして、前記第２制御セクションは前記成分計にて測定した吸光度に基づき、前記第１ヒータの温度を定値制御することを特徴とする請求項４に記載のシートたばこの製造機。 The second control section further includes a component meter that performs feedforward control of the temperature of the second heater while measuring the absorbance of the base web after the liquid fragrance is applied, and the second control section. 5. The sheet tobacco manufacturing machine according to claim 4, wherein the temperature of the first heater is controlled to a constant value based on the absorbance measured by the component meter.
PCT/JP2009/067413 2008-10-10 2009-10-06 Method for manufacturing tobacco sheet, and apparatus for manufacturing the same WO2010041660A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2008-263314 2008-10-10
JP2008263314A JP2012000002A (en) 2008-10-10 2008-10-10 Method and apparatus for manufacturing tobacco sheet

Publications (1)

Publication Number Publication Date
WO2010041660A1 true WO2010041660A1 (en) 2010-04-15

Family

ID=42100610

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2009/067413 WO2010041660A1 (en) 2008-10-10 2009-10-06 Method for manufacturing tobacco sheet, and apparatus for manufacturing the same

Country Status (2)

Country Link
JP (1) JP2012000002A (en)
WO (1) WO2010041660A1 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014020699A1 (en) * 2012-07-31 2014-02-06 日本たばこ産業株式会社 Sheet tobacco weight measurement device, measurement method thereof, sheet tobacco manufacturing system and manufacturing method thereof
CN105559130A (en) * 2015-12-30 2016-05-11 山东中烟工业有限责任公司 Feeding system and method for tobaccos with different incoming moistures
CN108236125A (en) * 2016-12-23 2018-07-03 红塔烟草(集团)有限责任公司 A kind of baking silk method of cut tobacco over-dried cut tobacco amount after reduction EVA pneumatic conveying dryings
CN108236124A (en) * 2016-12-23 2018-07-03 红塔烟草(集团)有限责任公司 A kind of baking silk method for reducing the tower cut-tobacco drier stem over-dried cut tobacco amounts of Qinhuangdao SH984
CN111375549A (en) * 2018-12-28 2020-07-07 贵州中烟工业有限责任公司 Tobacco winnowing equipment and secondary winnowing flow measuring method, device and equipment thereof
CN112741361A (en) * 2021-02-09 2021-05-04 湖北中烟工业有限责任公司 Forming device and method for reversely stripping double-layer drying oven of reconstituted tobacco by thick pulp method

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6061291B2 (en) 2012-11-12 2017-01-18 鳥取県 Method for separating heavy metals from glass
EP2977511B1 (en) * 2013-03-21 2020-02-12 Japan Tobacco Inc. Production method for black liquor and production method for liquid containing flavoring component
KR102355493B1 (en) 2018-09-13 2022-01-25 주식회사 케이티앤지 Apparatus and method of manufacturing tobacco rod
KR102355494B1 (en) * 2018-09-13 2022-01-25 주식회사 케이티앤지 Apparatus and method of manufacturing tobacco sheet
EP4052593A4 (en) * 2019-10-31 2023-11-15 Japan Tobacco Inc. Tobacco filler for heat-not-burn tobacco products, heat-not-burn tobacco product, and electrically heated tobacco product
WO2022019032A1 (en) * 2020-07-20 2022-01-27 日本たばこ産業株式会社 Device and method for manufacturing reconstituted tobacco sheet
CN114001541B (en) * 2021-11-30 2022-10-21 江苏贝尔机械有限公司 DDGS feed drying equipment and DDGS feed drying process
CN114098134B (en) * 2021-12-15 2023-03-28 云南中烟新材料科技有限公司 Heating cigarette core material and preparation method thereof

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2761533B2 (en) * 1993-04-30 1998-06-04 ブラウン アンド ウイリアムソン タバコ コーポレーション Improved remanufactured tobacco products
WO2001072154A1 (en) * 2000-03-29 2001-10-04 Japan Tobacco Inc. Sheet tobacco manufacturing device
JP2002176964A (en) * 2000-12-13 2002-06-25 Japan Tobacco Inc Sheeted tobacco, method for producing the same, and apparatus for producing the same
JP2003211072A (en) * 2002-01-25 2003-07-29 Mitsubishi Paper Mills Ltd Method for controlling coating weight profile

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2761533B2 (en) * 1993-04-30 1998-06-04 ブラウン アンド ウイリアムソン タバコ コーポレーション Improved remanufactured tobacco products
WO2001072154A1 (en) * 2000-03-29 2001-10-04 Japan Tobacco Inc. Sheet tobacco manufacturing device
JP2002176964A (en) * 2000-12-13 2002-06-25 Japan Tobacco Inc Sheeted tobacco, method for producing the same, and apparatus for producing the same
JP2003211072A (en) * 2002-01-25 2003-07-29 Mitsubishi Paper Mills Ltd Method for controlling coating weight profile

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014020699A1 (en) * 2012-07-31 2014-02-06 日本たばこ産業株式会社 Sheet tobacco weight measurement device, measurement method thereof, sheet tobacco manufacturing system and manufacturing method thereof
RU2598278C1 (en) * 2012-07-31 2016-09-20 Джапан Тобакко Инк. Device and method for measuring density of tobacco fabric and system and method for manufacturing tobacco fabric
US10051882B2 (en) 2012-07-31 2018-08-21 Japan Tobacco Inc. Basis weight measuring apparatus and method for sheet tobacco, and manufacturing system and method for sheet tobacco
CN105559130A (en) * 2015-12-30 2016-05-11 山东中烟工业有限责任公司 Feeding system and method for tobaccos with different incoming moistures
CN108236125A (en) * 2016-12-23 2018-07-03 红塔烟草(集团)有限责任公司 A kind of baking silk method of cut tobacco over-dried cut tobacco amount after reduction EVA pneumatic conveying dryings
CN108236124A (en) * 2016-12-23 2018-07-03 红塔烟草(集团)有限责任公司 A kind of baking silk method for reducing the tower cut-tobacco drier stem over-dried cut tobacco amounts of Qinhuangdao SH984
CN111375549A (en) * 2018-12-28 2020-07-07 贵州中烟工业有限责任公司 Tobacco winnowing equipment and secondary winnowing flow measuring method, device and equipment thereof
CN112741361A (en) * 2021-02-09 2021-05-04 湖北中烟工业有限责任公司 Forming device and method for reversely stripping double-layer drying oven of reconstituted tobacco by thick pulp method

Also Published As

Publication number Publication date
JP2012000002A (en) 2012-01-05

Similar Documents

Publication Publication Date Title
WO2010041660A1 (en) Method for manufacturing tobacco sheet, and apparatus for manufacturing the same
WO2010041659A1 (en) Apparatus for adding perfume to a tobacco sheet
RU2476128C1 (en) Method and device for cigarette folding paper manufacture
CA2749343C (en) Method for moisture and temperature control in corrugating operation
RU2682770C2 (en) Apparatus for the production of a cast web of homogenized tobacco material
RU2511391C1 (en) Machine and method of manufacturing weakly smouldering web and method of manufacturing weakly smouldering wrapping paper used for cigarettes
CA2758463C (en) Arrangement and method for processing a cigarette paper web
CN102892953B (en) Production method and production device for coated paper
WO1996005371A1 (en) Method and apparatus for controlling moisture of product during paper changing time in paper machine
JP4588067B2 (en) Cigarette manufacturing equipment
KR20200030901A (en) Apparatus and method of manufacturing tobacco rod
JP4530369B2 (en) Cigarette manufacturing equipment
US20170008246A1 (en) Method and equipment for control and manufacture of corrugated cardboard
FI111472B (en) Procedure for controlling the moisture profile in a paper web
KR20200030900A (en) Apparatus and method of manufacturing tobacco sheet
JP2004191038A5 (en)
EP3813557B1 (en) Method and apparatus to cast a web of a material containing alkaloids
JP5679703B2 (en) Wet paper dryer for paper machine
RU2024102221A (en) PRODUCTION LINE FOR THE PRODUCTION OF COMPOSTABLE CAPSULES FOR BREWED PRODUCTS AND SYSTEM FOR MEASUREMENT AND REGULATION OF RELATIVE HUMIDITY OF BIODEGRADABLE PAPER-BASED MATERIAL
JP2006002312A (en) Method for controlling moisture profile of paper web and moisture profile controlling device using the same

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 09819194

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 09819194

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: JP