EP4548783A1 - Reconstituted tobacco sheet production device and production method - Google Patents

Reconstituted tobacco sheet production device and production method Download PDF

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Publication number
EP4548783A1
EP4548783A1 EP22949297.0A EP22949297A EP4548783A1 EP 4548783 A1 EP4548783 A1 EP 4548783A1 EP 22949297 A EP22949297 A EP 22949297A EP 4548783 A1 EP4548783 A1 EP 4548783A1
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EP
European Patent Office
Prior art keywords
reconstituted tobacco
sheet
raw material
tobacco raw
shaped
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
EP22949297.0A
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German (de)
English (en)
French (fr)
Inventor
Kotaro SENDA
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Japan Tobacco Inc
Original Assignee
Japan Tobacco Inc
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 Japan Tobacco Inc filed Critical Japan Tobacco Inc
Publication of EP4548783A1 publication Critical patent/EP4548783A1/en
Pending legal-status Critical Current

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    • 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

Definitions

  • the present invention relates to a manufacturing apparatus and a manufacturing method for a reconstituted tobacco sheet.
  • rolling is particularly suitable for a reconstituted tobacco raw material containing a moisture content of 50vol% or lower.
  • a kneaded product of reconstituted tobacco raw material is rolled with rotary rollers to adjust the thickness and then dried with a separately provided dryer.
  • casting is particularly suitable for a reconstituted tobacco raw material containing a moisture content of 50vol% or higher.
  • a fluid of reconstituted tobacco raw material is continuously spread onto a rotary drum or a belt conveyor and evened out to a desired thickness with a member called a blade, then peeled off from the rotary drum or the belt conveyor and dried with a separately provided dryer.
  • sheet making is particularly suitable for a reconstituted tobacco raw material containing a moisture content of 80vol% or higher.
  • a fluid of reconstituted tobacco raw material is continuously spread onto a liquid-permeable belt conveyor, subjected to removal of moisture and evened out to a desired thickness with squeeze rollers, and then dried with a separately provided dryer.
  • a manufacturing apparatus and a manufacturing method for a reconstituted tobacco sheet which allow to obtain a reconstituted tobacco sheet with a uniform thickness with a simple manufacturing process regardless of the amount of moisture contained in reconstituted tobacco raw material, are known (see PTL 1).
  • One object of the present invention is to provide a manufacturing apparatus and a manufacturing method for a reconstituted tobacco sheet, which manufacture a reconstituted tobacco sheet with a small number of wrinkles.
  • a first aspect provides a manufacturing apparatus for a reconstituted tobacco sheet.
  • This manufacturing apparatus for a reconstituted tobacco sheet includes a die that discharges reconstituted tobacco raw material in a sheet shape, and a temperature adjustment device that adjusts a temperature of the reconstituted tobacco raw material passing through the die.
  • one of causes of formation of wrinkles of sheet-shaped reconstituted tobacco raw material discharged from the die is a flowability of the raw material.
  • the flow rate may not uniform in a discharge direction or in a width direction.
  • it is possible to decrease the viscosity of the reconstituted tobacco raw material that is, increase the flowability of the reconstituted tobacco raw material, by heating the reconstituted tobacco raw material passing through the die with the temperature adjustment device.
  • Wrinkles may be formed when there occurs a part where the discharge flow rate is high in the width direction of the reconstituted tobacco sheet. For this reason, according to the first aspect, it is possible to partially reduce the discharge flow rate and uniformizing the discharge flow rate in the width direction by partially cooling the part where the discharge flow rate is high with the temperature adjustment device. As a result, it is possible to suppress formation of wrinkles in the reconstituted tobacco sheet.
  • "wrinkles" of the reconstituted tobacco sheet are not limited to folds formed in the sheet and also include a nonuniform thickness part, slack, or wavy part of the sheet, a wave pattern appearance, or the like.
  • An outline of a second aspect is that, in the first aspect, the temperature adjustment device is mounted to the die.
  • the temperature adjustment device is capable of directly adjusting via the die the temperature of the reconstituted tobacco raw material passing through the die, so it is possible to further efficiently adjust the temperature of the reconstituted tobacco raw material.
  • An outline of a third aspect is that, in the first aspect or the second aspect, the temperature adjustment device includes a heating device that heats the reconstituted tobacco raw material passing through the die.
  • the third aspect it is possible to decrease the viscosity of the reconstituted tobacco raw material, that is, increase the flowability of the reconstituted tobacco raw material, by heating the reconstituted tobacco raw material passing through the die with the heating device.
  • An outline of a fourth aspect is that, in the third aspect, the heating device is configured to heat the reconstituted tobacco raw material such that the temperature of the reconstituted tobacco raw material passing through the die becomes lower than 100°C.
  • the fourth aspect it is possible to suppress formation of wrinkles in the reconstituted tobacco sheet by increasing the flowability of the reconstituted tobacco raw material while reducing condensation of moisture contained in the reconstituted tobacco raw material at a discharge port of the die as a result of vaporization of the moisture.
  • An outline of a fifth aspect is that, in the first aspect or the second aspect, the temperature adjustment device includes a cooling device that cools the reconstituted tobacco raw material passing through the die.
  • the fifth aspect it is possible to uniform the discharge flow rate in the width direction by partially cooling the part where the discharge flow rate is high with the cooling device. As a result, it is possible to suppress formation of wrinkles in the reconstituted tobacco sheet.
  • An outline of a sixth aspect is that, in any one of the first aspect to the fifth aspect, the die has a slot-shaped discharge port through which the reconstituted tobacco raw material is discharged in a sheet shape, and the manufacturing apparatus for a reconstituted tobacco sheet includes a plurality of the temperature adjustment devices mounted to the die along a longitudinal direction of the discharge port and controllable independently of each other.
  • the sixth aspect it is possible to partially adjust the temperature of the reconstituted tobacco raw material passing through the die in the longitudinal direction of the discharge port of the die, that is, in the width direction orthogonal to the discharge direction. Therefore, when the flow rate is not uniform in the width direction, it is possible to suppress formation of wrinkles in the discharged sheet-shaped reconstituted tobacco raw material by partially adjusting the temperature (that is, viscosity) of reconstituted tobacco.
  • An outline of a seventh aspect is that, in any one of the first aspect to the sixth aspect, a control device configured to control an operation of the temperature adjustment device is provided.
  • the operation of the temperature adjustment device can be controlled by the control device, so it is possible to control the operation of the temperature adjustment device such that formation of wrinkles is suppressed according to formation of wrinkles.
  • An outline of an eighth aspect is that, in the seventh aspect, a first sensor that is communicably connected to the control device and that measures the temperature of the reconstituted tobacco raw material passing through the die is provided and the control device is configured to control an operation of the temperature adjustment device based on measured data of the first sensor.
  • the control device when the temperature measured by the first sensor is lower than a predetermined value, it is estimated that the viscosity of the reconstituted tobacco raw material passing through the die is high, so the control device can suppress formation of wrinkles by controlling the temperature adjustment device such that the temperature of the reconstituted tobacco raw material increases.
  • the control device when the temperature measured by the first sensor is higher than a predetermined value, for example, higher than or equal to 100°C, the control device is capable of suppressing occurrence of a state change, such as vaporization, of the reconstituted tobacco raw material or a chemical change of the reconstituted tobacco raw material by controlling the temperature adjustment device such that the temperature of the reconstituted tobacco raw material decreases.
  • an extruder that extrudes the reconstituted tobacco raw material to the die includes an extrusion screw, a chamber through which the reconstituted tobacco raw material extruded by the extrusion screw passes, and a second sensor that is communicably connected to the control device and that measures a temperature or a pressure in the chamber, and the control device controls an operation of the temperature adjustment device based on measured data of the second sensor.
  • the temperature or the pressure in the chamber of the extruder can be measured with the second sensor.
  • the temperature in the chamber is lower than a predetermined value or when the pressure in the chamber is higher than a predetermined value, it is estimated that the viscosity of the reconstituted tobacco raw material is high.
  • dispersion of raw material inside the die is not facilitated, and there is a possibility that uniform discharge of the reconstituted tobacco raw material from the die becomes difficult.
  • the control device when the temperature in the chamber is lower than a predetermined value or when the pressure in the chamber is higher than a predetermined value, the control device is capable of controlling the operation of the temperature adjustment device such that the reconstituted tobacco raw material is heated to decrease the viscosity.
  • the control device when the temperature in the chamber is higher than a predetermined value, for example, higher than or equal to 100°C, the control device is capable of suppressing occurrence of a state change, such as vaporization, of the reconstituted tobacco raw material or a chemical change of the reconstituted tobacco raw material by controlling the temperature adjustment device such that the temperature of the reconstituted tobacco raw material decreases.
  • An outline of a tenth aspect is that, in any one of the seventh aspect to the ninth aspect dependent on the sixth aspect, a third sensor that is communicably connected to the control device and that measures an appearance, a flow rate, or a sheet thickness of the sheet-shaped reconstituted tobacco raw material discharged from the die is provided, and the control device controls an operation of at least one of a plurality of the temperature adjustment devices based on measured data of the third sensor.
  • the third sensor measures the appearance, the flow rate, or the sheet thickness, with the result that it is possible to detect whether wrinkles are formed in the sheet-shaped reconstituted tobacco raw material.
  • the control device can detect formation of wrinkles based on measured data on the appearance with the third sensor.
  • the control device receives measured data on the flow rate or sheet thickness with the third sensor and can determine that wrinkles are formed when a fluctuation range of the sheet thickness or flow rate in a predetermined time falls outside a predetermined range. In this way, when the control device detects formation of wrinkles, it is possible to suppress formation of wrinkles by, for example, heating or cooling the reconstituted tobacco raw material passing through the die.
  • the manufacturing apparatus for a reconstituted tobacco sheet preferably includes third sensors in the same number as the number of a plurality of the temperature adjustment devices.
  • the plurality of third sensors is disposed along the width direction to measure the thickness or flow rate of the sheet-shaped reconstituted tobacco raw material at multiple points in the width direction, with the result that the control device can detect a part where the sheet is thick (a part where the flow rate is high) or a part where the sheet is thin (a part where the flow rate is low) in the width direction.
  • the control device is capable of suppressing formation of wrinkles by controlling the temperature adjustment device corresponding to the third sensor having measured the thick part or thin part of the sheet in the width direction according to this detection result.
  • An outline of an eleventh aspect is that, in the seventh aspect, an extruder that extrudes the reconstituted tobacco raw material to the die and a third sensor that is communicably connected to the control device and that measures an appearance, a flow rate, or a sheet thickness of the sheet-shaped reconstituted tobacco raw material discharged from the die are provided, the control device is configured to control an operation of the extruder, and the control device controls an extrusion rate of the extruder based on measured data of the third sensor.
  • the third sensor measures the appearance, the flow rate, or the sheet thickness, with the result that it is possible to detect whether wrinkles are formed in the sheet-shaped reconstituted tobacco raw material.
  • control device can detect formation of wrinkles based on measured data on the appearance with the third sensor.
  • the control device receives measured data on the flow rate or sheet thickness with the third sensor and can determine that wrinkles are formed when, for example, a fluctuation range of the sheet thickness or flow rate in a predetermined time falls outside a predetermined range. In this way, when the control device detects formation of wrinkles, it is possible to suppress formation of wrinkles by increasing the extrusion rate of the extruder.
  • An outline of a twelfth aspect is that, in any one of the first aspect to the eleventh aspect, a take-up device that takes up the sheet-shaped reconstituted tobacco raw material discharged from the die while applying tension to the sheet-shaped reconstituted tobacco raw material is provided.
  • tension can be applied to the sheet-shaped reconstituted tobacco raw material discharged from the die with the take-up device, so, when wrinkles are formed in the sheet-shaped reconstituted tobacco raw material, it is possible to stretch the wrinkles and reduce the extent of the wrinkles.
  • a thirteenth aspect provides a manufacturing method for a reconstituted tobacco sheet.
  • the manufacturing method for a reconstituted tobacco sheet includes adjusting a temperature of the reconstituted tobacco raw material passing through a die, and discharging the reconstituted tobacco raw material from the die in a sheet shape.
  • one of causes of formation of wrinkles of a reconstituted tobacco sheet discharged from the die is a flowability of raw material.
  • the flow rate can be not uniform in a discharge direction or in a width direction.
  • it is possible to decrease the viscosity of the reconstituted tobacco raw material that is, increase the flowability of the reconstituted tobacco raw material, by heating the reconstituted tobacco raw material passing through the die with the temperature adjustment device.
  • Wrinkles may be formed when there occurs a part where the discharge flow rate is high in the width direction of the reconstituted tobacco sheet. For this reason, according to the thirteenth aspect, it is possible to uniform the discharge flow rate in the width direction by partially cooling the part where the discharge flow rate is high. As a result, it is possible to suppress formation of wrinkles in the reconstituted tobacco sheet.
  • a fourteenth aspect provides a manufacturing apparatus for a reconstituted tobacco sheet.
  • the manufacturing apparatus for a reconstituted tobacco sheet includes a die that discharges reconstituted tobacco raw material in a sheet shape, an extruder that extrudes the reconstituted tobacco raw material to the die, a control device configured to control an operation of the extruder, and a first sensor that is communicably connected to the control device and that measures an appearance, a flow rate, or a sheet thickness of the sheet-shaped reconstituted tobacco raw material discharged from the die, and the control device controls an extrusion rate of the extruder based on measured data of the first sensor.
  • the first sensor measures the appearance, the flow rate, or the sheet thickness, with the result that it is possible to detect whether wrinkles are formed in the sheet-shaped reconstituted tobacco raw material.
  • control device can detect formation of wrinkles based on measured data on the appearance with the first sensor.
  • the control device receives measured data on the flow rate or sheet thickness with the first sensor and can determine that wrinkles are formed when, for example, a fluctuation range of the sheet thickness or flow rate in a predetermined time falls outside a predetermined range. In this way, when the control device detects formation of wrinkles, it is possible to suppress formation of wrinkles by increasing the extrusion rate of the extruder.
  • An outline of a fifteenth aspect is that, in the fourteenth aspect, the control device increases the extrusion rate of the extruder when the control device determines that a fluctuation range of the sheet thickness or flow rate measured by the first sensor in a predetermined time falls outside a predetermined range.
  • the control device understands that the flow rate is not uniform in the discharge direction of the sheet when a fluctuation range of the thickness or flow rate measured by the first sensor falls outside a predetermined range, and determines that wrinkles are formed.
  • the control device is capable of suppressing formation of wrinkles by increasing the extrusion rate of the extruder when a fluctuation range of the thickness or flow rate measured by the first sensor falls outside a predetermined range.
  • An outline of a sixteenth aspect is that, in the fourteenth aspect, the first sensor is configured to measure a thickness or a flow rate of the sheet-shaped reconstituted tobacco raw material discharged from the die at multiple points in a width direction, and the control device increases the extrusion rate of the extruder based on the thickness or the flow rate measured by the first sensor at the multiple points.
  • the first sensor measures the thickness or flow rate of the sheet-shaped reconstituted tobacco raw material at multiple points in the width direction, with the result that the control device can detect a part where the sheet is thick (a part where the flow rate is high) or a part where the sheet is thin (a part where the flow rate is low) in the width direction.
  • An outline of a seventeenth aspect is that, in the fourteenth aspect, the control device determines whether wrinkles are formed in the sheet-shaped reconstituted tobacco raw material based on the appearance measured by the first sensor and increases the extrusion rate of the extruder when the control device determines that the wrinkles are formed.
  • An outline of an eighteenth aspect is that, in any one of the fourteenth aspect to the seventeenth aspect, a second sensor that is communicably connected to the control device and that is configured to measure a pressure inside the die or the extruder is provided, and the control device decreases the extrusion rate of the extruder when the control device determines that the pressure measured by the second sensor is higher than or equal to a predetermined value.
  • the control device increases the extrusion rate of the extruder to suppress formation of wrinkles
  • the control device determines that the pressure measured by the second sensor is higher than or equal to a predetermined value
  • the control device is capable of stabilizing a discharge status by decreasing the extrusion rate of the extruder.
  • An outline of a nineteenth aspect is that, in any one of the fourteenth aspect to the eighteenth aspect, a third sensor that is communicably connected to the control device and that is configured to measure a temperature of the reconstituted tobacco raw material passing through the die or the extruder is provided, and the control device increases the extrusion rate of the extruder when the control device determines that the temperature measured by the third sensor is lower than or equal to a predetermined value.
  • the temperature of the reconstituted tobacco raw material also increases.
  • the temperature of the reconstituted tobacco raw material passing through the die or the extruder is lower than or equal to a predetermined value, it is presumable that the viscosity of the reconstituted tobacco raw material inside the die or the extruder is high or the extrusion rate is low, with the result that there is a possibility that wrinkles can be formed in the sheet-shaped reconstituted tobacco raw material discharged from the die.
  • the control device determines that the temperature measured by the third sensor is lower than or equal to a predetermined value, it is possible to suppress formation of wrinkles by increasing the extrusion rate of the extruder.
  • a twentieth aspect provides a manufacturing method for a reconstituted tobacco sheet.
  • the manufacturing method for a reconstituted tobacco sheet includes supplying a reconstituted tobacco raw material to an extruder, extruding the reconstituted tobacco raw material to a die with the extruder, discharging the reconstituted tobacco raw material from the die in a sheet shape, measuring an appearance, flow rate, or sheet thickness of the sheet-shaped reconstituted tobacco raw material discharged from the die, and controlling an extrusion rate of the extruder based on a measurement result of the appearance, flow rate, or sheet thickness of the reconstituted tobacco raw material.
  • wrinkles are formed in the sheet-shaped reconstituted tobacco raw material when material is not uniformly dispersed inside the die and the flow rate is not uniform in the discharge direction or in the width direction. For this reason, when wrinkles are formed in the sheet-shaped reconstituted tobacco raw material, the pressure inside the die is increased and raw material is uniformly dispersed by increasing the extrusion rate of the extruder. As a result, formation of wrinkles in the sheet-shaped reconstituted tobacco raw material is suppressed. According to the twentieth aspect, it is possible to detect whether there are wrinkles in sheet-shaped reconstituted tobacco raw material by measuring the appearance, flow rate, or sheet thickness of the sheet-shaped reconstituted tobacco raw material discharged from the die.
  • formation of wrinkles can be detected based on a measurement result of the appearance.
  • a fluctuation range of the sheet thickness or flow rate in a predetermined time falls outside a predetermined range based on a measurement result of the flow rate or sheet thickness, it can be determined that wrinkles are formed. In this way, when formation of wrinkles has been detected, it is possible to suppress formation of wrinkles by increasing the extrusion rate of the extruder.
  • An outline of a twenty-first aspect is that, in the twentieth aspect, when a fluctuation range of the sheet thickness or flow rate in a predetermined time falls outside a predetermined range, the extrusion rate of the extruder is increased.
  • the flow rate is not uniform in the discharge direction of the sheet when a fluctuation range of the thickness or flow rate measured falls outside a predetermined range, and it is determined that wrinkles are formed. In this way, it is possible to suppress formation of wrinkles by increasing the extrusion rate of the extruder when a fluctuation range of the thickness or flow rate measured falls outside a predetermined range.
  • An outline of a twenty-second aspect is that, in the twentieth aspect, a thickness or a flow rate of the sheet-shaped reconstituted tobacco raw material discharged from the die at multiple points in a width direction is measured, and the extrusion rate of the extruder is increased based on the thickness or flow rate measured at the multiple points.
  • the twenty-second aspect by measuring the thickness or flow rate of the sheet-shaped reconstituted tobacco raw material at multiple points in the width direction, a part where the sheet is thick (a part where the flow rate is high) or a part where the sheet is thin (a part where the flow rate is low) in the width direction can be detected.
  • wrinkles are formed, for example, "when a part thicker than or thinner than a predetermined thickness is detected", “when a difference in thickness between selected two points of multiple points falls outside a predetermined numeric range”, “when a difference between an average value and a maximum value or a minimum value of thicknesses at multiple points falls outside a predetermined numeric range”, “when a distribution of thicknesses at multiple points falls outside a predetermined range”, or the like, and it is possible to suppress formation of wrinkles by increasing the extrusion rate of the extruder.
  • An outline of a twenty-third aspect is that, in the twentieth aspect, it is determined whether wrinkles are formed in the sheet-shaped reconstituted tobacco raw material based on the appearance, and the extrusion rate of the extruder is increased when the wrinkles are formed.
  • the twenty-third aspect it is determined whether wrinkles are formed in the sheet-shaped reconstituted tobacco raw material based on the appearance, and it is possible to suppress formation of the wrinkles by increasing the extrusion rate of the extruder.
  • An outline of a twenty-fourth aspect is that, in any one of the twentieth aspect to the twenty-third aspect, a pressure inside the die or the extruder is measured and the extrusion rate of the extruder is decreased when the measured pressure is higher than or equal to a predetermined value.
  • the pressure inside the die or the extruder is too high, there are concerns about occurrence of backflow from the die to the extruder.
  • the extrusion rate of the extruder is increased to suppress formation of wrinkles, when it is determined that the measured pressure is higher than or equal to a predetermined value, it is possible to stabilize a discharge status by decreasing the extrusion rate of the extruder.
  • An outline of a twenty-fifth aspect is that, in any one of the twentieth aspect to the twenty-fourth aspect, a temperature of the reconstituted tobacco raw material passing through the die or the extruder is measured and the extrusion rate of the extruder is increased when the measured temperature is lower than or equal to a predetermined value.
  • the temperature of the reconstituted tobacco raw material also increases.
  • the temperature of the reconstituted tobacco raw material passing through the die or the extruder is lower than or equal to a predetermined value, it is presumable that the viscosity of the reconstituted tobacco raw material inside the die or the extruder is high or the extrusion rate is low, with the result that there is a possibility that wrinkles can be formed in the sheet-shaped reconstituted tobacco raw material discharged from the die.
  • the twenty-fifth aspect when it is determined that the measured temperature is lower than or equal to a predetermined value, it is possible to suppress formation of wrinkles by increasing the extrusion rate of the extruder.
  • a twenty-sixth aspect provides a manufacturing apparatus for a reconstituted tobacco sheet.
  • the manufacturing apparatus for a reconstituted tobacco sheet includes a die that discharges reconstituted tobacco raw material in a sheet shape, and a take-up device that takes up the sheet-shaped reconstituted tobacco raw material discharged from the die, the take-up device includes a pair of first drive rollers sandwiching the sheet-shaped reconstituted tobacco raw material, and the take-up device is configured to take off the sheet-shaped reconstituted tobacco raw material while applying tension to the sheet-shaped reconstituted tobacco raw material.
  • the discharged sheet-shaped reconstituted tobacco raw material is heated and dried in a downstream process to be solidified, so the sheet-shaped reconstituted tobacco raw material discharged from the die is easily ripped.
  • stable tension can be applied by sandwiching the sheet-shaped reconstituted tobacco raw material discharged from the die with the first drive rollers of the take-up device.
  • the wrinkles can be stretched with the take-up device.
  • the take-up device includes a pair of second drive rollers that take-up the sheet-shaped reconstituted tobacco raw material from the pair of first drive rollers while sandwiching the sheet-shaped reconstituted tobacco raw material, and a rotation speed of the second drive rollers is higher than a rotation speed of the first drive rollers.
  • the sheet-shaped reconstituted tobacco raw material is taken off while being sandwiched by the first drive rollers and the second drive rollers higher in rotation speed than the first drive rollers, desired tension can be applied to the sheet-shaped reconstituted tobacco raw material by a difference in rotation speed between these pairs of drive rollers. Therefore, it is possible to appropriately stretch wrinkles by adjusting the rotation speed of the first drive rollers and the rotation speed of the second drive rollers according to the extent of wrinkles in the sheet-shaped reconstituted tobacco raw material.
  • the take-up device includes a tension roller configured to apply tension to the sheet-shaped reconstituted tobacco raw material taken off by the pair of first drive rollers and movable in a predetermined direction, and a biasing member pressing the tension roller against the sheet-shaped reconstituted tobacco raw material.
  • the twenty-eighth aspect it is possible to apply predetermined tension to the sheet-shaped reconstituted tobacco raw material with the tension roller and the biasing member.
  • An outline of a twenty-ninth aspect is that, in any one of the twenty-sixth aspect to the twenty-eighth aspect, the take-up device includes a direction change roller located upstream of the first drive rollers and changes a conveying direction of the sheet-shaped reconstituted tobacco raw material discharged from the die.
  • a discharge port of a die is oriented downward in a vertical direction, so sheet-shaped reconstituted tobacco raw material is discharged downward in the vertical direction.
  • a conveying direction of the sheet-shaped reconstituted tobacco raw material can be changed to, for example, a horizontal direction by the direction change roller, so it is possible to appropriately convey the sheet-shaped reconstituted tobacco raw material to a downstream take-up mechanism, such as the first drive rollers.
  • an outline of a thirtieth aspect is that, in any one of the twenty-sixth aspect to the twenty-ninth aspect, the take-up device includes a treatment roller located downstream of the first drive rollers and applies surface treatment to the sheet-shaped reconstituted tobacco raw material conveyed from the first drive rollers.
  • the treatment roller applies surface treatment, such as perforating, uneven processing, embossing, and debossing, to sheet-shaped reconstituted tobacco raw material, it is possible to increase the surface area of the sheet-shaped reconstituted tobacco raw material. Thus, it is possible to increase a flavor or an aerosol that is generated when the sheet-shaped reconstituted tobacco raw material is heated.
  • surface treatment with the treatment roller is performed, there are concerns that the sheet-shaped reconstituted tobacco raw material is easily ripped.
  • the treatment roller is located downstream of the first drive rollers, so application of tension by the first drive rollers to surface-treated sheet-shaped reconstituted tobacco raw material is avoided, with the result that ripping of the sheet-shaped reconstituted tobacco raw material can be suppressed.
  • An outline of a thirty-first aspect is that, in any one of the twenty-sixth aspect to the thirtieth aspect, the take-up device is configured to take off the sheet-shaped reconstituted tobacco raw material at room temperature.
  • the take-up device includes, for example, a heating roller, a drying roller, or the like
  • the amount of moisture in the sheet-shaped reconstituted tobacco raw material taken off changes, so the physical properties can change.
  • a tensile strength varies over time, so there are concerns that there occurs a part where stress concentrates in the sheet-shaped reconstituted tobacco raw material and the sheet-shaped reconstituted tobacco raw material is easily ripped.
  • since heating or drying is not actively performed in the take-up device it is possible to take off the sheet-shaped reconstituted tobacco raw material while applying tension to the sheet-shaped reconstituted tobacco raw material in a state where physical properties are less likely to change. Therefore, it is possible to stretch wrinkles while suppressing ripping of the sheet-shaped reconstituted tobacco raw material.
  • An outline of a thirty-second aspect is that, in any one of the twenty-sixth aspect to the thirty-first aspect, a control device that controls driving of the pair of first drive rollers and a sheet sensor that is communicably connected to the control device and that measures a flow rate of the sheet-shaped reconstituted tobacco raw material discharged from a die are provided, and the control device is configured to control a rotation speed of the pair of first drive rollers based on flow rate data measured by the sheet sensor.
  • the thirty-second aspect it is possible to apply desired tension to the sheet-shaped reconstituted tobacco raw material while controlling the rotation speed of the first drive rollers according to a flow rate.
  • An outline of a thirty-third aspect is that, in any one of the twenty-sixth aspect to the thirty-second aspect, a control device that controls driving of the pair of first drive rollers and a tension sensor that is communicably connected to the control device and that measures tension applied to the sheet-shaped reconstituted tobacco raw material discharged from the die are provided, and the control device is configured to control a rotation speed of the pair of first drive rollers based on tension data measured by the tension sensor.
  • the thirty-third aspect it is possible to apply desired tension to the sheet-shaped reconstituted tobacco raw material by controlling the rotation speed of the first drive rollers according to tension actually applied to the sheet-shaped reconstituted tobacco raw material.
  • a thirty-fourth aspect provides a manufacturing method for a reconstituted tobacco sheet.
  • the manufacturing method for a reconstituted tobacco sheet includes discharging the reconstituted tobacco raw material from a die in a sheet shape, taking off the sheet-shaped reconstituted tobacco raw material by sandwiching the sheet-shaped reconstituted tobacco raw material with a pair of first drive rollers, and applying tension to the sheet-shaped reconstituted tobacco raw material.
  • a discharged tobacco sheet is heated and dried to be solidified in a downstream process, so the tobacco sheet discharged from the die is easily ripped.
  • stable tension can be applied by sandwiching the sheet-shaped reconstituted tobacco raw material discharged from the die with the first drive rollers.
  • the wrinkles can be stretched.
  • An outline of a thirty-fifth aspect is that, in the thirty-fourth aspect, the sheet-shaped reconstituted tobacco raw material from the pair of first drive rollers is taken off while being sandwiched by a pair of second drive rollers, and a rotation speed of the second drive rollers is higher than a rotation speed of the first drive rollers.
  • the thirty-fifth aspect since the sheet-shaped reconstituted tobacco raw material is taken off while being sandwiched by the first drive rollers and the second drive rollers higher in rotation speed than the first drive rollers, desired tension can be applied to the sheet-shaped reconstituted tobacco raw material by a difference in rotation speed between these pairs of drive rollers. Therefore, it is possible to appropriately stretch wrinkles by adjusting the rotation speed of the first drive rollers and the rotation speed of the second drive rollers according to the extent of wrinkles in the sheet-shaped reconstituted tobacco raw material.
  • An outline of a thirty-sixth aspect is that, in the thirty-fourth aspect or the thirty-fifth aspect, tension is applied with a tension roller to the sheet-shaped reconstituted tobacco raw material taken off by the pair of first drive rollers by pressing the tension roller against the sheet-shaped reconstituted tobacco raw material.
  • the thirty-sixth aspect it is possible to apply predetermined tension to the sheet-shaped reconstituted tobacco raw material with the tension roller.
  • An outline of a thirty-seventh aspect is that, in any one of the thirty-fourth aspect to the thirty-sixth aspect, a conveying direction of the sheet-shaped reconstituted tobacco raw material discharged from the die is changed upstream of the first drive rollers.
  • a discharge port of a die is oriented downward in a vertical direction, so sheet-shaped reconstituted tobacco raw material is discharged downward in the vertical direction.
  • a conveying direction of the sheet-shaped reconstituted tobacco raw material can be changed to, for example, a horizontal direction, so it is possible to appropriately convey the sheet-shaped reconstituted tobacco raw material to a downstream take-up mechanism, such as the first drive rollers.
  • An outline of a thirty-eighth aspect is that, in any one of the thirty-fourth aspect to the thirty-seventh aspect, surface treatment is applied to the sheet-shaped reconstituted tobacco raw material conveyed from the first drive rollers downstream of the first drive rollers.
  • the thirty-eighth aspect when surface treatment, such as perforating, uneven processing, embossing, and debossing, is applied to sheet-shaped reconstituted tobacco raw material, it is possible to increase the surface area of the sheet-shaped reconstituted tobacco raw material. Thus, it is possible to increase a flavor or an aerosol that is generated when the sheet-shaped reconstituted tobacco raw material is heated.
  • surface treatment such as perforating, uneven processing, embossing, and debossing
  • An outline of a thirty-ninth aspect is that, in any one of the thirty-fourth aspect to the thirty-eighth aspect, the sheet-shaped reconstituted tobacco raw material is taken off by the first drive rollers at room temperature.
  • the take-up process includes, for example, a heating process, a drying process, or the like
  • the amount of moisture in the sheet-shaped reconstituted tobacco raw material taken off changes, so the physical properties can change.
  • a tensile strength varies over time, so there are concerns that there occurs a part where stress concentrates in the sheet-shaped reconstituted tobacco raw material and the sheet-shaped reconstituted tobacco raw material is easily ripped.
  • since heating or drying is not actively performed in the take-up process it is possible to take off the sheet-shaped reconstituted tobacco raw material while applying tension to the sheet-shaped reconstituted tobacco raw material in a state where physical properties are less likely to change. Therefore, it is possible to stretch wrinkles while suppressing ripping of the sheet-shaped reconstituted tobacco raw material.
  • An outline of a fortieth aspect is that, in any one of the thirty-fourth aspect to the thirty-ninth aspect, a flow rate of the sheet-shaped reconstituted tobacco raw material discharged from the die is measured, and a rotation speed of the first drive rollers is controlled based on measured flow rate data.
  • An outline of a forty-first aspect is that, in any one of the thirty-fourth aspect to the fortieth aspect, tension applied to the sheet-shaped reconstituted tobacco raw material discharged from the die is measured, and a rotation speed of the first drive rollers is controlled based on measured tension data.
  • the forty-first aspect it is possible to apply desired tension to the sheet-shaped reconstituted tobacco raw material by controlling the rotation speed of the first drive rollers according to tension actually applied to the sheet-shaped reconstituted tobacco raw material.
  • a discharge direction means a direction in which sheet-shaped reconstituted tobacco raw material is discharged from a die or a direction in which sheet-shaped reconstituted tobacco raw material is conveyed.
  • a "width direction” means a direction orthogonal to the discharge direction.
  • Fig. 1 is a schematic side sectional view of a manufacturing apparatus for a reconstituted tobacco sheet according to the present embodiment.
  • Fig. 2 is a side view when a die shown in Fig. 1 is viewed from a discharge port side.
  • a manufacturing apparatus 100 for a reconstituted tobacco sheet according to the present embodiment includes a die 40 that discharges reconstituted tobacco raw material in a sheet shape.
  • the manufacturing apparatus 100 for a reconstituted tobacco sheet can further include an extruder 10 configured to extrude reconstituted tobacco raw material to the die 40.
  • the extruder 10 can include a housing 12, a drawing screw 14, and an extrusion screw 16.
  • the drawing screw 14 is configured to rotate to extrude reconstituted tobacco raw material in a direction orthogonal to a rotation axis of the drawing screw 14.
  • the extrusion screw 16 is configured to rotate to extrude reconstituted tobacco raw material in a direction parallel to a rotation axis of the extrusion screw 16.
  • the housing 12 can be made of a tough material, such as a metal, for example, SUS.
  • the housing 12 has an input port 12a, a conveying space 12b, and a chamber 12c inside.
  • the input port 12a is open upward and accommodates the drawing screw 14 inside.
  • the conveying space 12b accommodates the extrusion screw 16.
  • the die 40 includes a housing 42 and a discharge port 44 that discharges sheet-shaped reconstituted tobacco raw material S1.
  • the housing 42 can be made of a tough material, such as a metal, for example, SUS.
  • the housing 42 has a chamber 42a inside.
  • the chamber 42a communicates with the discharge port 44.
  • the die 40 can further include an adjustment tool 46 for adjusting the thickness of the discharge port 44.
  • the adjustment tool 46 can be, for example, a tool, such as a bolt, for adjusting the shape of a nozzle part of the housing 42.
  • the nozzle part defines the discharge port 44.
  • a plurality of the adjustment tools 46 can be provided in the width direction (a sheet depth direction in Fig. 1 ) of the die 40 (see Figs. 3 and 4 (described later)).
  • the discharge port 44 can have a slot shape.
  • the "slot shape” is not limited a specific hole shape and can be a selected shape having a predetermined longitudinal direction.
  • the discharge port 44 is disposed such that the longitudinal direction is oriented in the width direction (the sheet depth direction in Fig. 1 ) of the die 40.
  • the manufacturing apparatus 100 for a reconstituted tobacco sheet preferably includes a temperature adjustment device 70 that adjusts the temperature of reconstituted tobacco raw material passing through the die 40. It is found that one of causes of formation of wrinkles of the sheet-shaped reconstituted tobacco raw material S1 discharged from the die 40 is a flowability of raw material. Specifically, when the flowability of raw material is low, the flow rate can be not uniform in a discharge direction or in a width direction.
  • the temperature adjustment device 70 can include a heating device that heats reconstituted tobacco raw material passing through the die 40.
  • a heating device that heats reconstituted tobacco raw material passing through the die 40.
  • Wrinkles may be formed when there is a part where a discharge flow rate is high in the width direction of the sheet-shaped reconstituted tobacco raw material S1.
  • the temperature adjustment device 70 can include a cooling device that cools reconstituted tobacco raw material passing through the die 40. In this case, it is possible to uniform the discharge flow rate in the width direction by partially cooling the part where the discharge flow rate is high with the temperature adjustment device 70. As a result, it is possible to suppress formation of wrinkles in the sheet-shaped reconstituted tobacco raw material S1.
  • the heating device 70 is preferably configured to heat reconstituted tobacco raw material such that the temperature of the reconstituted tobacco raw material passing through the die 40 becomes lower than 100°C. In this case, it is possible to suppress formation of wrinkles in the sheet-shaped reconstituted tobacco raw material S1 by increasing the flowability of reconstituted tobacco raw material while suppressing condensation of moisture contained in the reconstituted tobacco raw material at the discharge port 44 of the die 40 as a result of vaporization.
  • the temperature adjustment device 70 is preferably mounted to the die 40.
  • the temperature adjustment device 70 is capable of directly adjusting via the die 40 the temperature of reconstituted tobacco raw material passing through the die 40, so it is possible to further efficiently adjust the temperature of the reconstituted tobacco raw material.
  • the temperature adjustment device 70 can be mounted so as to be in contact with the surface of the housing 42 of the die 40. More specifically, the temperature adjustment device 70 is preferably mounted so as to be in contact with the surface of the housing 42 and place the chamber 42a of the die 40 in between.
  • the temperature adjustment device 70 may be mounted to the extruder 10. For example, in a case where it is not possible to sufficiently heat reconstituted tobacco raw material during passage of the die 40, the reconstituted tobacco raw material passing through the extruder 10 may be heated with the temperature adjustment device 70 mounted to the extruder 10.
  • the manufacturing apparatus 100 for a reconstituted tobacco sheet preferably further includes a control device 60 configured to control operation of the temperature adjustment device 70.
  • the operation of the temperature adjustment device 70 can be controlled by the control device 60, so it is possible to control the operation of the temperature adjustment device 70 such that formation of wrinkles is suppressed according to formation of the wrinkles.
  • the control device 60 can be configured to be communicable with the temperature adjustment device 70.
  • the manufacturing apparatus 100 for a reconstituted tobacco sheet preferably includes a temperature sensor 24 (which corresponds to an example of the first sensor) that is communicably connected to the control device 60 and that measures the temperature of reconstituted tobacco raw material passing through the die 40.
  • the control device 60 controls the operation of the temperature adjustment device 70 based on measured data of the temperature sensor 24. For example, when the temperature measured by the temperature sensor 24 is lower than a predetermined value, it is estimated that the viscosity of the reconstituted tobacco raw material passing through the die 40 is high, so the control device 60 can suppress formation of wrinkles by controlling the temperature adjustment device 70 such that the temperature of the reconstituted tobacco raw material increases.
  • the control device 60 is capable of suppressing occurrence of a state change, such as vaporization, of the reconstituted tobacco raw material or a chemical change of the reconstituted tobacco raw material by controlling the temperature adjustment device 70 such that the temperature of the reconstituted tobacco raw material decreases.
  • a state change such as vaporization
  • the control device 60 controls the temperature adjustment device 70 such that the temperature of the reconstituted tobacco raw material decreases.
  • at least part of the temperature sensor 24 can be embedded in the housing 42 or exposed to the chamber 42a.
  • the control device 60 may control the operation of the temperature adjustment device 70 based on temperature data received from a temperature or pressure sensor 22 (described later) that measures the temperature or pressure of reconstituted tobacco raw material passing through the chamber 12c.
  • the manufacturing apparatus 100 for a reconstituted tobacco sheet preferably includes the temperature or pressure sensor 22 (which corresponds to an example of the second sensor) that is communicably connected to the control device 60 and that measures a temperature or pressure in the chamber 12c of the extruder 10.
  • the control device 60 controls the operation of the temperature adjustment device 70 based on measured data of the temperature or pressure sensor 22. Specifically, when the temperature in the chamber 12c is lower than a predetermined value or when the pressure in the chamber 12c is higher than a predetermined value, it is estimated that the viscosity of the reconstituted tobacco raw material is high. In this case, there is a possibility that backflow of the reconstituted tobacco raw material from the die 40 to the extruder 10 can occur.
  • the control device 60 is capable of controlling the operation of the temperature adjustment device 70 such that the reconstituted tobacco raw material is heated to decrease the viscosity.
  • the control device 60 is capable of suppressing occurrence of a state change, such as vaporization, of the reconstituted tobacco raw material or a chemical change of the reconstituted tobacco raw material by controlling the temperature adjustment device 70 such that the temperature of the reconstituted tobacco raw material decreases.
  • the manufacturing apparatus 100 for a reconstituted tobacco sheet preferably includes a sheet sensor 26 (which corresponds to an example of the third sensor) that is communicably connected to the control device 60 and that measures an appearance, flow rate, or sheet thickness of sheet-shaped reconstituted tobacco raw material discharged from the die 40.
  • the control device 60 controls the operation of the temperature adjustment device 70 based on measured data of the sheet sensor 26.
  • Fig. 3 is a side view of the die 40 and the sheet-shaped reconstituted tobacco raw material S1, taken along the line 3-3 in Fig. 1 .
  • the manufacturing apparatus 100 for a reconstituted tobacco sheet includes the single temperature adjustment device 70 provided on one face of the housing 42 of the die 40 and the single sheet sensor 26.
  • the sheet sensor 26 measures the appearance, the flow rate, or the sheet thickness, with the result that it is possible to detect whether wrinkles are formed in the sheet-shaped reconstituted tobacco raw material S1.
  • the control device 60 can detect formation of wrinkles based on measured data on the appearance with the sheet sensor 26.
  • the control device 60 receives measured data on the flow rate or sheet thickness in a predetermined range, to be measured by the sheet sensor 26 and can determine that wrinkles are formed when a fluctuation range of the sheet thickness or flow rate in a predetermined time falls outside the predetermined range. In this way, when the control device 60 detects formation of wrinkles, the control device 60 is capable of suppressing formation of wrinkles by controlling the temperature adjustment device 70 such that reconstituted tobacco raw material passing through the die 40 is heated or cooled.
  • Fig. 4 is a side view of the die 40 and the sheet-shaped reconstituted tobacco raw material S1, taken along the line 3-3 in Fig. 1 according to another embodiment.
  • the manufacturing apparatus 100 for a reconstituted tobacco sheet preferably includes a plurality of (five in the drawing) temperature adjustment devices 70 mounted to the die 40 along the longitudinal direction of the discharge port 44 (the width direction of the die 40) and controllable independently of one another.
  • the longitudinal direction of the discharge port 44 of the die 40 that is, in the width direction orthogonal to the discharge direction, it is possible to partially adjust the temperature of reconstituted tobacco raw material passing through the die 40. Therefore, when the flow rate is not uniform in the width direction, it is possible to suppress formation of wrinkles in the discharged sheet-shaped reconstituted tobacco raw material S1 by partially adjusting the temperature (that is, viscosity) of reconstituted tobacco.
  • the control device 60 controls the operation of at least one of the plurality of temperature adjustment devices 70 based on measured data of the sheet sensor 26.
  • the sheet sensor 26 measures the appearance, the flow rate, or the sheet thickness, with the result that it is possible to detect whether wrinkles are formed in the sheet-shaped reconstituted tobacco raw material S1.
  • the control device 60 can detect formation of wrinkles based on measured data on the appearance with the sheet sensor 26.
  • the control device 60 receives measured data on the flow rate or sheet thickness with the sheet sensor 26 and can determine that wrinkles are formed when a fluctuation range of the sheet thickness or flow rate in a predetermined time falls outside a predetermined range. In this way, when the control device 60 detects formation of wrinkles, it is possible to suppress formation of wrinkles by, for example, heating or cooling the reconstituted tobacco raw material passing through the die 40.
  • the manufacturing apparatus 100 may include the single sheet sensor 26 and preferably includes a plurality of the sheet sensors 26.
  • the manufacturing apparatus 100 for a reconstituted tobacco sheet can include a plurality of sheet sensors 26 arranged along the width direction of the sheet-shaped reconstituted tobacco raw material S1.
  • the control device 60 controls the operation of at least one of the plurality of temperature adjustment devices 70 based on measured data of the plurality of sheet sensors 26.
  • the manufacturing apparatus 100 in a case where the manufacturing apparatus 100 for a reconstituted tobacco sheet includes the plurality of temperature adjustment devices 70, the manufacturing apparatus 100 preferably includes sheet sensors 26 in the same number as the number of the temperature adjustment devices 70.
  • the plurality of third sensors 26 is disposed along the width direction as shown in Fig. 4 to measure the thickness or flow rate of the sheet-shaped reconstituted tobacco raw material S1 at multiple points in the width direction, with the result that the control device 60 can detect a part where the sheet is thick (a part where the flow rate is high) or a part where the sheet is thin (a part where the flow rate is low) in the width direction.
  • the control device 60 is capable of suppressing formation of wrinkles by controlling at least one of the temperature adjustment devices 70, corresponding to any one of the plurality of sheet sensors 26 having measured the thick part or thin part of the sheet in the width direction according to this detection result.
  • control device 60 controls the operation of the temperature adjustment device 70 to reduce wrinkles in the sheet-shaped reconstituted tobacco raw material S1 discharged from the die 40.
  • control device 60 can reduce wrinkles in the sheet-shaped reconstituted tobacco raw material S1 discharged from the die 40 by controlling the operation of the extruder 10.
  • the control device 60 can be communicably connected to the extruder 10.
  • the control device 60 preferably controls the operation of the extruder 10.
  • the control device 60 can control an extrusion rate of the extruder 10 based on measured data of the sheet sensor 26.
  • wrinkles are formed in the sheet-shaped reconstituted tobacco raw material S1 when material is not uniformly dispersed inside the die 40 and the flow rate is not uniform in the discharge direction or in the width direction. For this reason, when wrinkles are formed in the sheet-shaped reconstituted tobacco raw material S1, the pressure inside the die 40 (that is, the chamber 42a) is increased and raw material is uniformly dispersed by increasing the extrusion rate of the extruder 10. As a result, formation of wrinkles in the sheet-shaped reconstituted tobacco raw material S1 is suppressed.
  • the sheet sensor 26 measures the appearance, the flow rate, or the sheet thickness, with the result that it is possible to detect whether wrinkles are formed in the sheet-shaped reconstituted tobacco raw material S1.
  • the control device 60 determines whether wrinkles are formed in the sheet-shaped reconstituted tobacco raw material S1 based on the appearance measured by the sheet sensor 26 and increases the extrusion rate of the extruder 10 when the control device 60 determines that the wrinkles are formed.
  • the control device 60 determines whether wrinkles are formed in the sheet-shaped reconstituted tobacco raw material S1 by applying, for example, a known image analysis or the like to the appearance measured by the sheet sensor 26.
  • the control device 60 is capable of suppressing formation of wrinkles by increasing the extrusion rate of the extruder 10.
  • control device 60 can increase the rotation speed of at least one pair of the first drive rollers 82 and the second drive rollers 84 in a case where the flow rate of the sheet-shaped reconstituted tobacco raw material S1 has increased and can decrease the rotation speed of at least one pair of the first drive rollers 82 and the second drive rollers 84 in a case where the flow rate of the sheet-shaped reconstituted tobacco raw material S1 has decreased.

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  • Manufacture Of Tobacco Products (AREA)
EP22949297.0A 2022-06-28 2022-06-28 Reconstituted tobacco sheet production device and production method Pending EP4548783A1 (en)

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PCT/JP2022/025700 WO2024004020A1 (ja) 2022-06-28 2022-06-28 再構成たばこシートの製造装置及び製造方法

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US (1) US20250143363A1 (enrdf_load_stackoverflow)
EP (1) EP4548783A1 (enrdf_load_stackoverflow)
JP (1) JP7732099B2 (enrdf_load_stackoverflow)
WO (1) WO2024004020A1 (enrdf_load_stackoverflow)

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JPWO2024004020A1 (enrdf_load_stackoverflow) 2024-01-04

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