US20250143363A1 - 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
US20250143363A1
US20250143363A1 US19/001,807 US202419001807A US2025143363A1 US 20250143363 A1 US20250143363 A1 US 20250143363A1 US 202419001807 A US202419001807 A US 202419001807A US 2025143363 A1 US2025143363 A1 US 2025143363A1
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Prior art keywords
reconstituted tobacco
sheet
raw material
tobacco raw
shaped
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US19/001,807
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Inventor
Kotaro SENDA
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Japan Tobacco Inc
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Japan Tobacco Inc
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Assigned to JAPAN TOBACCO INC. reassignment JAPAN TOBACCO INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: SENDA, Kotaro
Publication of US20250143363A1 publication Critical patent/US20250143363A1/en
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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 50 vol % 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 50 vol % 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 80 vol % 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.
  • the control device understands that 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 is capable of suppressing formation of wrinkles by increasing the extrusion rate of the extruder.
  • 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.
  • the control device determines whether wrinkles are formed in the sheet-shaped reconstituted tobacco raw material by applying, for example, a known image analysis or the like to the appearance measured by the first sensor.
  • the control device is capable of suppressing formation of wrinkles by increasing the extrusion rate of the extruder.
  • 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.
  • FIG. 1 is a schematic side sectional view of a manufacturing apparatus for a reconstituted tobacco sheet according to an embodiment.
  • FIG. 2 is a side view when a die shown in FIG. 1 is viewed from a discharge port side.
  • FIG. 3 is a side view of the die and a sheet-shaped reconstituted tobacco raw material, taken along the line 3 - 3 in FIG. 1 .
  • FIG. 4 is a side view of the die and the sheet-shaped reconstituted tobacco raw material, taken along the line 3 - 3 in FIG. 1 according to another embodiment.
  • FIG. 5 is a flowchart that shows a manufacturing method for a reconstituted tobacco sheet.
  • FIG. 6 is a schematic side sectional view of a take-up device.
  • 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 12 a, a conveying space 12 b, and a chamber 12 c inside.
  • the input port 12 a is open upward and accommodates the drawing screw 14 inside.
  • the conveying space 12 b accommodates the extrusion screw 16 .
  • the put-in reconstituted tobacco raw material is drawn into the conveying space 12 b by rotation of the drawing screw 14 .
  • reconstituted tobacco raw material is extruded into the chamber 12 c while being kneaded by the extrusion screw 16 .
  • Reconstituted tobacco raw material extruded by the extrusion screw 16 passes through the chamber 12 c and is extruded to the die 40 .
  • a discharge rate of reconstituted tobacco raw material discharged from the die 40 can be determined depending on the rotation speed of the extrusion screw 16 .
  • reconstituted tobacco raw material is a kneaded product including at least one material selected from among polysaccharides (such as starch and dextrin), water or alcohol (such as ethanol and propylene glycol) or at least one material selected by him or herself as a selected liquid medium, and strips or granules of a tobacco plant.
  • Reconstituted tobacco raw material is not limited to the above-described ones and may contain another material.
  • the die 40 includes a housing 42 and a discharge port 44 that discharges sheet-shaped reconstituted tobacco raw material S 1 .
  • the housing 42 can be made of a tough material, such as a metal, for example, SUS.
  • the housing 42 has a chamber 42 a inside.
  • the chamber 42 a 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 S 1 discharged from the die 40 is a flowability of raw material.
  • the temperature adjustment device 70 can include a heating device that heats reconstituted tobacco raw material passing through the die 40 .
  • the temperature adjustment device 70 it is possible to decrease the viscosity of reconstituted tobacco raw material, that is, increase the flowability of reconstituted tobacco raw material, by heating the reconstituted tobacco raw material passing through the die 40 with the temperature adjustment device 70 .
  • 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 S 1 .
  • 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 S 1 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 42 a of the die 40 in between.
  • the temperature adjustment device 70 may be mounted to the extruder 10 .
  • 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 42 a.
  • 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 12 c.
  • 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 12 c 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 12 c is lower than a predetermined value or when the pressure in the chamber 12 c 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 S 1 , 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 S 1 .
  • 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 S 1 , 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 S 1 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 S 1 .
  • 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 S 1 .
  • 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 S 1 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 S 1 discharged from the die 40 .
  • control device 60 can reduce wrinkles in the sheet-shaped reconstituted tobacco raw material S 1 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 . As described above, it is found that wrinkles are formed in the sheet-shaped reconstituted tobacco raw material S 1 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.
  • 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 S 1 .
  • the control device 60 determines whether wrinkles are formed in the sheet-shaped reconstituted tobacco raw material S 1 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 S 1 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 .
  • the control device 60 can increase the extrusion rate of the extruder 10 when the control device 60 determines that a fluctuation range of the sheet thickness or flow rate measured by the sheet sensor 26 in a predetermined time falls outside a predetermined range.
  • the control device 60 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 sheet sensor 26 falls outside a predetermined range, and determines that wrinkles are formed. In this way, the control device 60 is capable of suppressing formation of wrinkles by increasing the extrusion rate of the extruder 10 when a fluctuation range of the thickness or flow rate measured by the sheet sensor 26 falls outside a predetermined range.
  • the sheet sensor 26 is preferably configured to measure a thickness or flow rate of the sheet-shaped reconstituted tobacco raw material S 1 discharged from the die 40 at multiple points in the width direction.
  • the sheet sensor 26 may include a plurality of sheet sensors 26 as shown in FIG. 4 , and a thickness or flow rate at multiple points in the width direction may be measured with the single sheet sensor 26 .
  • the control device 60 increases the extrusion rate of the extruder 10 based on a thickness or flow rate at multiple points, measured by the sheet sensor 26 .
  • the sheet sensor 26 measures the thickness or flow rate of the sheet-shaped reconstituted tobacco raw material S 1 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 manufacturing apparatus 100 for a reconstituted tobacco sheet preferably includes a pressure sensor 28 that is communicably connected to the control device 60 and that is configured to measure a pressure inside the die 40 .
  • the temperature or pressure sensor 22 and the pressure sensor 28 function as a sensor configured to measure a pressure in the die 40 or the extruder 10 .
  • the control device 60 preferably decreases the extrusion rate of the extruder 10 when the control device 60 determines that a pressure measured by the temperature or pressure sensor 22 or the pressure sensor 28 is higher than or equal to a predetermined value.
  • the pressure inside the die 40 or the extruder 10 is excessively high, there are concerns about occurrence of backflow from the die 40 to the extruder 10 .
  • control device 60 has suppressed formation of wrinkles by increasing the extrusion rate of the extruder 10 based on measured data of the sheet sensor 26 as described above, there is a possibility that the pressure inside the die 40 or the extruder 10 can excessively increase.
  • the control device 60 is capable of stabilizing a discharge status by decreasing the extrusion rate of the extruder 10 when the control device 60 determines that a pressure measured by the temperature or pressure sensor 22 or the pressure sensor 28 is higher than or equal to a predetermined value.
  • a pressure measured by the temperature or pressure sensor 22 or the pressure sensor 28 is high, it is possible to decrease the viscosity by heating reconstituted tobacco raw material inside the die 40 with the temperature adjustment device 70 to decrease the pressure.
  • the manufacturing apparatus 100 for a reconstituted tobacco sheet includes the temperature or pressure sensor 22 and the temperature sensor 24 .
  • the temperature or pressure sensor 22 and the temperature sensor 24 function as a sensor configured to measure the temperature of reconstituted tobacco raw material passing through the die 40 or the extruder 10 .
  • the control device 60 preferably increases the extrusion rate of the extruder 10 when the control device 60 determines that a temperature measured by the temperature or pressure sensor 22 or the temperature sensor 24 is lower than or equal to a predetermined value. In general, when the extrusion rate of the extruder 10 is increased, the temperature of the reconstituted tobacco raw material also increases.
  • the control device 60 determines that the temperature measured by the temperature or pressure sensor 22 or the temperature sensor 24 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 10 .
  • the manufacturing method for a reconstituted tobacco sheet according to the present embodiment includes adjusting the temperature of reconstituted tobacco raw material passing through the die 40 , and discharging the reconstituted tobacco raw material from the die 40 in a sheet shape.
  • the manufacturing method for a reconstituted tobacco sheet includes supplying reconstituted tobacco raw material to the extruder 10 , extruding the reconstituted tobacco raw material to the die 40 with the extruder 10 , discharging the reconstituted tobacco raw material from the die 40 in a sheet shape, measuring an appearance, flow rate, or sheet thickness of the sheet-shaped reconstituted tobacco raw material S 1 discharged from the die 40 , and controlling an extrusion rate of the extruder 10 based on a measurement result of the appearance, flow rate, or sheet thickness of the reconstituted tobacco raw material.
  • FIG. 5 is a flowchart that shows a manufacturing method for a reconstituted tobacco sheet.
  • reconstituted tobacco raw material is supplied to the extruder 10 .
  • the reconstituted tobacco raw material is put into the input port 12 a of the extruder 10 (step S 501 ).
  • the reconstituted tobacco raw material is extruded into the die 40 by the extruder 10 .
  • the reconstituted tobacco raw material is extruded into the die 40 by the drawing screw 14 and the extrusion screw 16 of the extruder 10 and is discharged from the die 40 in a sheet shape (step S 502 ).
  • control device 60 of the manufacturing apparatus 100 for a reconstituted tobacco sheet can measure the temperature of reconstituted tobacco raw material passing through the die 40 or the extruder 10 with the temperature or pressure sensor 22 or the temperature sensor 24 , receive temperature data from the temperature or pressure sensor 22 or the temperature sensor 24 , and determine whether the temperature of the reconstituted tobacco raw material in the chamber 12 c or the chamber 42 a is lower than or equal to a predetermined value (step S 503 ).
  • control device 60 can measure the pressure inside the die 40 or the extruder 10 with the temperature or pressure sensor 22 or the temperature sensor 24 , receives pressure data from the temperature or pressure sensor 22 or the pressure sensor 28 , determine whether the pressure in the chamber 12 c or the chamber 42 a is higher than or equal to a predetermined value (step S 503 ).
  • control device 60 determines that the temperature of reconstituted tobacco raw material in the chamber 12 c or the chamber 42 a is lower than or equal to a predetermined value or in a case where the control device 60 determines that the pressure in the chamber 12 c or the chamber 42 a is higher than or equal to a predetermined value (Yes in step S 503 ), the control device 60 can control the temperature adjustment device 70 such that the temperature of the reconstituted tobacco raw material increases (step S 506 ). Alternatively, in this case, the control device 60 can increase the extrusion rate of the extruder 10 (step S 506 ). The control device 60 may perform both heating of reconstituted tobacco raw material with the temperature adjustment device 70 and increasing of the extrusion rate of the extruder 10 or may perform only one of them.
  • control device 60 determines that the temperature of the reconstituted tobacco raw material in the chamber 12 c or the chamber 42 a is not lower than or equal to a predetermined value or in a case where the control device 60 determines that the pressure in the chamber 12 c or the chamber 42 a is not higher than or equal to a predetermined value (No in step S 503 ), the control device 60 executes the process of step S 504 . In other words, the control device 60 receives data of the appearance, flow rate, or sheet thickness from the sheet sensor 26 and determines whether wrinkles are formed (step S 504 ).
  • the control device 60 determines that wrinkles are formed.
  • a thickness or flow rate of the sheet-shaped reconstituted tobacco raw material S 1 discharged from the die 40 at multiple points in the width direction is measured as described above, and it is determined whether wrinkles are formed based on a measurement result.
  • the control device 60 can determine whether wrinkles are formed based on appearance data received from the sheet sensor 26 .
  • control device 60 determines that wrinkles are formed (Yes in step S 504 )
  • the control device 60 can control the temperature adjustment device 70 such that the temperature of the reconstituted tobacco raw material increases (step S 506 ).
  • the control device 60 can increase the extrusion rate of the extruder 10 (step S 506 ).
  • the control device 60 may perform both heating of reconstituted tobacco raw material with the temperature adjustment device 70 and increasing of the extrusion rate of the extruder 10 or may perform only one of them.
  • the control device 60 can receive pressure data from the temperature or pressure sensor 22 or the pressure sensor 28 and determine whether the pressure in the chamber 12 c or the chamber 42 a is higher than or equal to a predetermined value (step S 507 ). In a case where formation of wrinkles is suppressed by increasing the extrusion rate of the extruder 10 in step S 506 , there is a possibility that the pressure inside the die 40 or the extruder 10 excessively increases.
  • control device 60 determines that the pressure in the chamber 12 c or the chamber 42 a is higher than or equal to a predetermined value (Yes in step S 507 ), the control device 60 decreases the extrusion rate in step S 508 .
  • the predetermined value here is a value higher than the predetermined value of step S 503 .
  • control device 60 determines in step S 504 that wrinkles are not formed (No in step S 504 )
  • the control device 60 can receive temperature data from the temperature or pressure sensor 22 or the temperature sensor 24 and determine whether the temperature of the reconstituted tobacco raw material in the chamber 12 c or the chamber 42 a is higher than a predetermined value (step S 505 ).
  • the predetermined value here is a value different from the predetermined value in step S 503 and is, for example, 100° C.
  • control device 60 determines that the temperature of the reconstituted tobacco raw material in the chamber 12 c or the chamber 42 a is higher than or equal to a predetermined value (Yes in step S 506 ).
  • the control device 60 can control the temperature adjustment device 70 such that the temperature of the reconstituted tobacco raw material decreases (step S 508 ).
  • the control device 60 can decrease the extrusion rate of the extruder 10 (step S 506 ).
  • the control device 60 may perform both cooling of reconstituted tobacco raw material with the temperature adjustment device 70 and decreasing of the extrusion rate of the extruder 10 or may perform only one of them.
  • step S 501 to step S 508 are repeated, and a reconstituted tobacco sheet with a relatively small amount of wrinkles is manufactured. Only any one of step S 503 and step S 504 may be executed. Step S 505 , step S 507 , and step 508 are optional and can be omitted as needed. In a case where two or more of step S 503 , step S 504 , and step S 505 are executed, the order of them can be selected.
  • FIG. 6 is a schematic side sectional view of the take-up device.
  • the take-up device 80 is configured to take up the sheet-shaped reconstituted tobacco raw material S 1 discharged from the die 40 shown in FIG. 1 and the like.
  • the take-up device 80 includes a pair of first drive rollers 82 that sandwich the sheet-shaped reconstituted tobacco raw material S 1 and is configured to take up the sheet-shaped reconstituted tobacco raw material S 1 while applying tension to the sheet-shaped reconstituted tobacco raw material S 1 .
  • the discharged sheet-shaped reconstituted tobacco raw material S 1 is heated and dried in a downstream process to be solidified, so the sheet-shaped reconstituted tobacco raw material S 1 discharged from the die 40 is easily ripped.
  • the manufacturing apparatus 100 for a reconstituted tobacco sheet according to the present embodiment stable tension can be applied by sandwiching the sheet-shaped reconstituted tobacco raw material S 1 discharged from the die 40 with the first drive rollers 82 of the take-up device 80 .
  • the take-up device 80 preferably takes up the sheet-shaped reconstituted tobacco raw material S 1 in a horizontal direction from the viewpoint of conveyance, so the first drive rollers 82 preferably sandwiches the sheet-shaped reconstituted tobacco raw material S 1 in the vertical direction.
  • the take-up device 80 preferably includes a pair of second drive rollers 84 that take up the sheet-shaped reconstituted tobacco raw material S 1 from the pair of first drive rollers 82 while sandwiching the sheet-shaped reconstituted tobacco raw material S 1 .
  • the rotation speed of the second drive rollers 84 is set so as to be higher than the rotation speed of the first drive rollers 82 .
  • desired tension can be applied to the sheet-shaped reconstituted tobacco raw material S 1 by a difference in rotation speed between these pairs of drive rollers.
  • the second drive rollers 84 have rotation axes parallel to the first drive rollers 82 .
  • the sheet-shaped reconstituted tobacco raw material S 1 is taken off in the horizontal direction while being applied with tension by the first drive rollers 82 and the second drive rollers 84 .
  • the first drive rollers 82 and the second drive rollers 84 of the take-up device 80 may be controlled in operation by the above-described control device 60 , or a control device that controls the take-up device 80 and that is different from the control device 60 may be provided.
  • the take-up device 80 preferably includes a treatment roller that is located downstream of the first drive rollers 82 and that applies surface treatment to the sheet-shaped reconstituted tobacco raw material S 1 conveyed from the first drive rollers 82 .
  • a treatment roller that is located downstream of the first drive rollers 82 and that applies surface treatment to the sheet-shaped reconstituted tobacco raw material S 1 conveyed from the first drive rollers 82 .
  • the treatment roller applies surface treatment, such as perforating, uneven processing, embossing, and debossing, to the sheet-shaped reconstituted tobacco raw material S 1 .
  • surface treatment such as perforating, uneven processing, embossing, and debossing
  • the treatment roller is located downstream of the first drive rollers 82 , so application of tension by the first drive rollers 82 to the surface-treated sheet-shaped reconstituted tobacco raw material S 1 is avoided, with the result that ripping of the sheet-shaped reconstituted tobacco raw material S 1 can be suppressed.
  • the second drive rollers 84 have the function of the treatment roller.
  • a treatment roller may be provided separately from the second drive rollers 84 .
  • the take-up device 80 preferably includes a tension roller 86 movable in a predetermined direction, and a biasing member 87 that presses the tension roller 86 against the sheet-shaped reconstituted tobacco raw material S 1 .
  • the tension roller 86 is configured to apply tension to the sheet-shaped reconstituted tobacco raw material S 1 taken off by the pair of first drive rollers 82 . Predetermined tension can be applied to the sheet-shaped reconstituted tobacco raw material S 1 by the tension roller 86 and the biasing member 87 .
  • the biasing member 87 applies tension to the sheet-shaped reconstituted tobacco raw material S 1 by biasing the tension roller 86 to the sheet-shaped reconstituted tobacco raw material S 1 taken off in the horizontal direction from a vertically lower side toward a vertically upper side.
  • the tension roller 86 is configured to rotate about a rotation axis parallel to the first drive rollers 82 .
  • the take-up device 80 preferably includes a first direction change roller 88 a that is located upstream of the first drive rollers 82 and that changes the conveying direction of the sheet-shaped reconstituted tobacco raw material S 1 discharged from the die 40 .
  • the discharge port 44 of the die 40 is oriented downward in the vertical direction, so the sheet-shaped reconstituted tobacco raw material S 1 is discharged downward in the vertical direction.
  • the conveying direction of the sheet-shaped reconstituted tobacco raw material S 1 can be changed to, for example, the horizontal direction by the first direction change roller 88 a, so it is possible to appropriately convey the sheet-shaped reconstituted tobacco raw material S 1 to a downstream take-up mechanism, such as the first drive rollers 82 .
  • the sheet-shaped reconstituted tobacco raw material S 1 is partially taken off in the vertical direction by the tension roller 86 , so the take-up device 80 includes a second direction change roller 88 b that changes the conveying direction of the sheet-shaped reconstituted tobacco raw material S 1 , to which tension is applied by the tension roller 86 , to the horizontal direction again.
  • the take-up device 80 is preferably configured to take up the sheet-shaped reconstituted tobacco raw material S 1 at room temperature.
  • the take-up device 80 includes, for example, a heating roller, a drying roller, or the like, the amount of moisture in the sheet-shaped reconstituted tobacco raw material S 1 taken off changes, so the physical properties can change. In this case, 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 S 1 and the sheet-shaped reconstituted tobacco raw material S 1 is easily ripped.
  • the take-up device 80 since heating or drying is not actively performed in the take-up device 80 , it is possible to take up the sheet-shaped reconstituted tobacco raw material S 1 while applying tension to the sheet-shaped reconstituted tobacco raw material S 1 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 S 1 .
  • the control device 60 shown in FIG. 1 may control the rotation speed of the first drive rollers 82 based on flow rate data measured by the sheet sensor 26 .
  • the control device 60 may control the rotation speed of at least one pair of the first drive rollers 82 and the second drive rollers 84 based on flow rate data measured by the sheet sensor 26 .
  • 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 S 1 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 S 1 has decreased.
  • the take-up device 80 may further include a tension sensor 89 that is communicably connected to the control device 60 and that measures tension applied to the sheet-shaped reconstituted tobacco raw material S 1 discharged from the die 40 .
  • the control device 60 can control the first drive rollers 82 such that desired tension is applied to the sheet-shaped reconstituted tobacco raw material S 1 based on tension data measured by the tension sensor 89 .
  • the control device 60 can control at least one pair of the first drive rollers 82 and the second drive rollers 84 such that desired tension is applied to the sheet-shaped reconstituted tobacco raw material S 1 based on measured data received from the tension sensor 89 .
  • the control device 60 can change a relative speed between the first drive rollers 82 and the second drive rollers 84 .
  • the tension sensor 89 shown in FIG. 6 can measure tension applied to the sheet-shaped reconstituted tobacco raw material S 1 based on a load applied to the tension roller 86 .
  • the tension sensor 89 may be provided in the first direction change roller 88 a, the second direction change roller 88 b, the first drive rollers 82 , or the second drive rollers 84 .
  • a known tension sensor, such as a non-contact optical sensor, may be used as the tension sensor 89 .
  • a distance in which the sheet-shaped reconstituted tobacco raw material S 1 is pulled is shortened to be less likely to be ripped by passing the sheet-shaped reconstituted tobacco raw material S 1 through the plurality of freely rotating first direction change roller 88 a, tension roller 86 , second direction change roller 88 b, first drive rollers 82 , and second drive rollers 84 , in the take-up device 80 shown in FIG. 6 .
  • the arrangement of the first direction change roller 88 a, the tension roller 86 , the second direction change roller 88 b, the first drive rollers 82 , and the second drive rollers 84 may be changed as needed according to the strength of the sheet-shaped reconstituted tobacco raw material S 1 .
  • At least one of the first direction change roller 88 a, the second direction change roller 88 b, the first drive rollers 82 , and the second drive rollers 84 may be biased vertically or horizontally by a movable spring, and tension applied from the roller to the sheet-shaped reconstituted tobacco raw material S 1 may be allowed to be adjusted without changing the speed of each of the rollers.
  • the first direction change roller 88 a and the second direction change roller 88 b are adopted in order to change the conveying direction of the sheet-shaped reconstituted tobacco raw material S 1 ; however, the configuration is not limited thereto.
  • the number of direction change rollers can be increased or reduced according to, for example, the strength of the sheet-shaped reconstituted tobacco raw material S 1 , a conveying distance, the layout of components of the take-up device 80 , or the like.
  • a manufacturing method for a reconstituted tobacco sheet in the manufacturing apparatus 100 for a reconstituted tobacco sheet, including the take-up device 80 will be described.
  • reconstituted tobacco raw material is supplied to the extruder 10 , and the reconstituted tobacco raw material is discharged from the die 40 in a sheet shape.
  • the sheet-shaped reconstituted tobacco raw material S 1 is taken off while being sandwiched by the pair of first drive rollers 82 , and tension is applied to the sheet-shaped reconstituted tobacco raw material S 1 .
  • the sheet-shaped reconstituted tobacco raw material S 1 from the pair of first drive rollers 82 is preferably taken off while being sandwiched by the pair of second drive rollers 84 .
  • the rotation speed of the second drive rollers 84 is set so as to be higher than the rotation speed of the first drive rollers 82 .
  • the sheet-shaped reconstituted tobacco raw material S 1 conveyed from the first drive rollers 82 is preferably applied to surface treatment.
  • the conveying direction of the sheet-shaped reconstituted tobacco raw material S 1 discharged from the die 40 is preferably changed.
  • the tension roller 86 is preferably pressed against the sheet-shaped reconstituted tobacco raw material S 1 to apply tension with the tension roller 86 to the sheet-shaped reconstituted tobacco raw material S 1 taken off by the pair of first drive rollers 82 .
  • the take-up device 80 preferably does not include a heating roller or a drying roller.
  • the sheet-shaped reconstituted tobacco raw material S 1 is preferably taken off by the first drive rollers 82 at room temperature.
  • the manufacturing apparatus 100 for a reconstituted tobacco sheet includes the sheet sensor 26
  • the flow rate of the sheet-shaped reconstituted tobacco raw material S 1 discharged from the die 40 may be measured, and the rotation speed of the first drive rollers 82 may be controlled based on measured flow rate data.
  • the take-up device 80 includes the second drive rollers 84
  • the rotation speed of at least one pair of the first drive rollers 82 and the second drive rollers 84 may be controlled based on measured flow rate data.
  • the manufacturing apparatus 100 for a reconstituted tobacco sheet includes the tension sensor 89 , tension applied to the sheet-shaped reconstituted tobacco raw material S 1 discharged from the die 40 may be measured, and the rotation speed of the first drive rollers 82 may be controlled based on measured tension data.
  • the take-up device 80 includes the second drive rollers 84 , at least one pair of the first drive rollers 82 and the second drive rollers 84 may be controlled based on measured tension data. Specifically, a relative speed between the first drive rollers 82 and the second drive rollers 84 can be changed.

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US19/001,807 2022-06-28 2024-12-26 Reconstituted tobacco sheet production device and production method Pending US20250143363A1 (en)

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EP (1) EP4548783A1 (enrdf_load_stackoverflow)
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