CN110693067A - Forming system for preparing reconstituted tobacco sheets by tape casting method and operation method thereof - Google Patents
Forming system for preparing reconstituted tobacco sheets by tape casting method and operation method thereof Download PDFInfo
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- CN110693067A CN110693067A CN201911096516.XA CN201911096516A CN110693067A CN 110693067 A CN110693067 A CN 110693067A CN 201911096516 A CN201911096516 A CN 201911096516A CN 110693067 A CN110693067 A CN 110693067A
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- steel belt
- reconstituted tobacco
- slurry
- tobacco sheet
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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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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Abstract
The invention discloses a forming system for preparing reconstituted tobacco sheets by a tape casting method, which comprises the following steps: a frame (1), a steel belt (2), a head box (3), a heater (4), a leveling device (5), a scraper (6) and a winding device (7) which are arranged in sequence, when the moisture and the temperature of the reconstituted tobacco sheet meet the requirements in the preparation process, firstly, the thickness of the paper is adjusted by a flattening device (5), then the paper is scraped off by a scraper (6) and wound, when the leveling device (5) adjusts the thickness of the reconstituted tobacco sheet, the steel belt (2) carries the reconstituted tobacco sheet to operate and provides advancing force for the reconstituted tobacco sheet, the force can overcome the resistance when the reconstituted tobacco sheet passes through the gap between the upper compression roller (51) and the lower supporting roller (52), and at the moment, a larger external traction pulling force is not required to be provided for the reconstituted tobacco sheet, so that the requirement on the tensile strength of the reconstituted tobacco sheet is reduced, and the problem of narrow operable window of slurry formula and equipment process conditions in the preparation process of the reconstituted tobacco sheet is solved.
Description
Technical Field
The invention belongs to the technical field of reconstituted tobacco sheet production and processing, and particularly relates to a forming system for preparing reconstituted tobacco sheets by a tape casting method and an operation method thereof.
Background
With the acceleration of global tobacco control movement, the global tobacco industry enters a new period of seeking revolution and breakthrough, and further promotes and accelerates the research and development of novel tobacco products, such as heating non-combustion cigarettes, electronic cigarettes, buccal cigarettes and the like. The cigarette is an important component of the novel tobacco product.
Compared with granular and traditional tobacco shreds as tobacco section materials, the reconstituted tobacco sheet material has the characteristics of strong plasticity, homogenization and higher adjustable level while maintaining the active ingredients of natural tobacco. The reconstituted tobacco sheet is a cigarette filler which is prepared by using tobacco waste raw materials such as tobacco stems, tobacco powder and the like as main materials through recombination processing, and is also called as a tobacco sheet. The reconstituted tobacco sheet originates from the 50 th of the 20 th century, develops through 3 stages of a rolling method, a casting method and a paper-making method, and when the reconstituted tobacco sheet is prepared by the casting method, tobacco raw material powder, an adhesive, a smoke agent and other materials are uniformly distributed on the surface layer and the inner layer of a sheet base when the sheet base is formed, so that the reconstituted tobacco sheet has good thickness, quantitative stability, heat conduction uniformity and smoke effect, and is one of main reasons for becoming a material for heating a non-combustible cigarette tobacco section. Such as: the IQOS cigarette developed by Felmo tobacco company adopts the orderly-arranged tape-casting method to prepare the reconstituted tobacco sheet.
The process of preparing the reconstituted tobacco sheet by adopting a tape casting method in the prior art comprises the following steps: the blended reconstituted tobacco sheet slurry is conveyed to the flow box, the slurry in the flow box is controlled to flow out of a slurry outlet onto a running steel belt through a cutter on the flow box, the slurry on the steel belt is dried by a heater below the steel belt, the reconstituted tobacco sheet is gradually formed, after the moisture and the temperature of the reconstituted tobacco sheet meet requirements, the reconstituted tobacco sheet is scraped by a scraper, the thickness of the reconstituted tobacco sheet is adjusted by a flattening device, the flattening device is also a thickness adjusting roller and comprises an upper compression roller and a lower support roller, the reconstituted tobacco sheet with the same thickness is manually rolled onto a take-up shaft, and the reconstituted tobacco sheet has the following problems:
1. when the reconstituted tobacco sheets scraped by the scraper pass through the flattening device, in order to overcome the resistance of the upper pressing roller and the lower carrier roller to the reconstituted tobacco sheets and ensure that the reconstituted tobacco sheets pass through the gap between the upper pressing roller and the lower carrier roller, an external traction pulling force needs to be provided for the reconstituted tobacco sheets, the pulling force is difficult to control, if the provided pulling force is small, the reconstituted tobacco sheets cannot pass through the gap between the upper pressing roller and the lower carrier roller of the flattening device, and if the provided pulling force is large, the reconstituted tobacco sheets can be deformed or even broken.
2. In order to ensure that the reconstituted tobacco sheet can bear larger external traction tension, the reconstituted tobacco sheet is required to have better tensile strength, so that substances such as adhesives and the like are required to be added into the reconstituted tobacco sheet slurry to improve the viscosity of the slurry, in order to ensure that the reconstituted tobacco sheet slurry is dried as fast as possible and that the flatness of each part is consistent as far as possible before the reconstituted tobacco sheet slurry passes through a flattening device, the reconstituted tobacco sheet slurry is required to have better leveling property, a leveling agent or a diluting agent and the like are required to be added to reduce the viscosity of the slurry, in order to take the two into account, an operable window of a slurry formula and equipment process conditions is forced to be limited to be very narrow, and the flexible change of the reconstituted tobacco in the aspects of taste and mechanical properties is seriously influenced.
The present invention has been made to solve the above problems.
Disclosure of Invention
The invention provides a forming system for preparing reconstituted tobacco sheets by a tape casting method, which comprises the following steps: a frame 1, a steel belt 2, a head box 3, a heater 4, a leveling device 5, a scraper 6 and a winding device 7 which are arranged in sequence,
a gear 21 arranged on the frame 1 drives the steel belt 2 to circularly rotate;
the head box 3 is arranged on the upper part of the steel belt 2, the head box 3 can store slurry, the head box 3 is provided with a slurry outlet 32 which faces the steel belt 2 and can convey the slurry to the steel belt 2 through the slurry outlet 32, and a knife gate 31 is arranged at the slurry outlet 32;
the heater 4 is positioned at the lower part of the steel strip 2 and can heat the slurry on the steel strip 2;
the leveling device 5 comprises an upper pressing roller 51 and a lower carrier roller 52, wherein the upper pressing roller 51 is positioned at the upper part of the steel strip 2, and the lower carrier roller 52 is positioned at the lower part of the steel strip 2;
the scraper 6 is arranged on the frame 1 and is in contact with the steel belt 2;
the winding device 7 is arranged outside the machine frame 1 and comprises a winding table 71 and a winding shaft 72.
Preferably, the knife gate 31 is adjusted in a direction perpendicular to the steel strip 2, and the distance between the knife gate 31 and the steel strip 2 in the direction perpendicular to the steel strip 2 is 1-3mm, so as to control the thickness of the slurry flowing out.
Preferably, the upper pressing roller 51 is used for pressing the steel belt 2 and the slurry on the steel belt 2 from the upper part, the lower supporting roller 52 is used for supporting the steel belt 2 and the slurry on the steel belt 2 from the lower part, and the upper pressing roller 51 and the lower supporting roller 52 rotate in opposite directions to push the steel belt 2 and the slurry on the steel belt 2 to pass through a gap between the upper pressing roller 51 and the lower supporting roller 52, namely an inter-roller gap, so as to adjust the thickness of the reconstituted tobacco sheet obtained after the slurry is dried.
Preferably, the upper press roll 51 and the lower support roll 52 are connected to the frame 1 by screws and fastening nuts, the interval between the upper press roll 51 and the lower support roll 52 in the direction perpendicular to the steel strip 2 is 10-15mm, and the distance between the upper press roll 51 and the steel strip 2 in the direction perpendicular to the steel strip 2 is 5-7 mm.
Preferably, the horizontal angle of the scraper 6 and the steel belt 2 is 30-45 degrees, so that the scraper 6 can separate the prepared reconstituted tobacco sheet from the steel belt 2.
Preferably, the scraper 6 is detachably connected to the frame 1 for cleaning and replacement.
Preferably, the steel strip 2 is circulated in a horizontal direction.
A second aspect of the present invention provides a method of operating the molding system of the first aspect of the present invention, comprising the steps of:
a. starting the steel belt 2 to circularly operate, starting the heater 4 to heat the steel belt 2, setting the temperature of the steel belt 2 to be 30-50 ℃, controlling the slurry in the slurry box 3 to flow out of the slurry outlet 32 through the cutter door 31 after the temperature of the steel belt 2 reaches the set temperature, and drying the flowing slurry through the steel belt 2 to form a reconstituted tobacco sheet;
b. the thickness of the reconstituted tobacco sheets is adjusted through a leveling device 5, and when the thickness of the steel belt 2 and the thickness of the reconstituted tobacco sheets on the steel belt 2 are larger than the set thickness, an upper press roller 51 and a lower support roller 52 of the leveling device 5 are matched with each other to roll the reconstituted tobacco sheets on the steel belt 2;
c. the scraper 6 peels off the reconstituted tobacco sheet on the steel belt 2 from the steel belt 2, and the peeled reconstituted tobacco sheet is conveyed to a winding table 71 and wound on a winding shaft 72 for winding.
Preferably, in the step b, the distance between the upper pressing roller 51 and the lower supporting roller 52 in the direction perpendicular to the steel strip 2 is set to be 10-15mm, and the distance between the upper pressing roller 51 and the steel strip 2 in the direction perpendicular to the steel strip is set to be 5-7 mm.
The forming system is provided with a driving source and a control center, wherein the driving source provides a power source for equipment to drive each part to move, and the control center controls the motion state of each part.
Compared with the prior art, the invention has the following beneficial effects:
1. the reconstituted tobacco sheet forming system is provided with a flattening device 5, wherein the flattening device comprises an upper pressing roller 51 and a lower carrier roller 52, the upper pressing roller 51 is positioned at the upper part of a steel belt 2, and the lower carrier roller 52 is positioned at the lower part of the steel belt 2; when the moisture and the temperature of the reconstituted tobacco sheet meet the requirements, the thickness of the reconstituted tobacco sheet is adjusted through the flattening device 5, the reconstituted tobacco sheet with the consistent thickness is scraped off through the scraper, so that the reconstituted tobacco sheet is peeled from the steel belt 2, and then the reconstituted tobacco sheet is wound on a winding shaft. According to the reconstituted tobacco sheet thickness adjusting device, the reconstituted tobacco sheet is carried by the steel belt 2 to pass through the gap between the upper pressing roller 51 and the lower carrier roller 52, the advancing force provided by the steel belt 2 to the reconstituted tobacco sheet can overcome the resistance when the reconstituted tobacco sheet passes through the gap between the upper pressing roller 51 and the lower carrier roller 52, so that the reconstituted tobacco sheet passes through the gap between the upper pressing roller 51 and the lower carrier roller 52, and a large external traction pulling force (the advancing force is from the advancing force applied to the steel belt by a gear) is not required to be provided for the reconstituted tobacco sheet in the process, so that the problem that the reconstituted tobacco sheet is broken in the thickness adjusting process is avoided; meanwhile, as larger external traction tension is not required to be provided for the reconstituted tobacco sheet, the reconstituted tobacco sheet can be rolled into a roll only by a soft traction tension after being separated from the steel belt 2 by the scraper, the requirement on the tensile strength of the reconstituted tobacco sheet is reduced, the reconstituted tobacco sheet is further ensured to have better leveling property, the problems that in the preparation process of the reconstituted tobacco sheet in the prior art, the operable window of a slurry formula and the technological conditions of equipment is very narrow, the reconstituted tobacco is difficult to flexibly adjust in the aspects of taste and mechanical properties are solved, and the condition that the continuity of a processing process is influenced by the fact that the reconstituted tobacco sheet is pulled apart is also prevented.
2. In the forming system, the steel belt 2 carries the reconstituted tobacco sheets to pass through the gap between the upper pressing roller 51 and the lower supporting roller 52, the steel belt 2 is supported and fixed, the problem of drying and crushing of the reconstituted tobacco sheets can be effectively solved, the roller pressure is increased, and the quality of the reconstituted tobacco sheets is improved.
3. The device can mold and dry the reconstituted tobacco sheet for the heating non-combustion cigarette and prepare the sheet into a sample, meets the requirement of preparing the reconstituted tobacco sheet for the heating non-combustion cigarette, and provides support for the research of heating non-combustion cigarette.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.
FIG. 1 is a schematic structural diagram of a system for preparing reconstituted tobacco sheets by a tape casting method according to the invention;
the device comprises a frame 1, a steel belt 2, a head box 3, a heater 4, a leveling device 5, a scraper 6, a winding device 7, a gear 21, a knife gate 31, a slurry outlet 32, an upper press roll 51, a lower carrier roller 52, a winding table 71 and a winding shaft 72.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
The embodiment provides a forming system for preparing reconstituted tobacco sheets by a tape casting method, which comprises: a frame 1, a steel belt 2, a head box 3, a heater 4, a leveling device 5, a scraper 6 and a winding device 7 which are arranged in sequence,
the steel belt 2 is driven by a gear 21 fixed on the frame 1 and circularly operates along the horizontal direction;
the head box 3 is arranged on the upper part of the steel belt 2, the head box 3 can store slurry, the head box 3 is provided with a slurry outlet 32 which faces the steel belt 2 and can convey the slurry to the steel belt 2 through the slurry outlet 32, and a knife gate 31 is arranged at the slurry outlet 32;
the heater 4 is positioned at the lower part of the steel strip 2 and can heat the slurry on the steel strip 2;
the leveling device 5 comprises an upper pressing roller 51 and a lower carrier roller 52, wherein the upper pressing roller 51 is positioned at the upper part of the steel strip 2, and the lower carrier roller 52 is positioned at the lower part of the steel strip 2;
the scraper 6 is arranged on the frame 1 and is in contact with the steel belt 2;
the winding device 7 is arranged outside the machine frame 1 and comprises a winding table 71 and a winding shaft 72.
The knife gate 31 is adjusted along the direction vertical to the steel strip 2, and the distance between the knife gate 31 and the steel strip 2 along the direction vertical to the steel strip 2 is 2mm, so that the thickness of the flowing slurry is controlled.
The upper compression roller 51 is used for pressing the steel belt 2 and the sizing agent on the steel belt 2 from the upper part, the lower carrier roller 52 is used for supporting the steel belt 2 and the sizing agent on the steel belt 2 from the lower part, and the upper compression roller 51 and the lower carrier roller 52 rotate oppositely to push the steel belt 2 and the sizing agent on the steel belt 2 to pass through a gap between the rollers, so that the thickness of the reconstituted tobacco sheet obtained after the sizing agent is dried is adjusted.
The upper pressing roller 51 and the lower carrier roller 52 are connected with the frame 1 through screws and fastening nuts, the distance between the upper pressing roller 51 and the lower carrier roller 52 in the direction perpendicular to the steel strip 2 is 10mm, and the distance between the upper pressing roller 51 and the steel strip 2 in the direction perpendicular to the steel strip 2 is 6 mm.
The horizontal angle between the scraper 6 and the steel belt 2 is 35 degrees, so that the scraper 6 can separate the prepared reconstituted tobacco sheet from the steel belt.
The scraper 6 is detachably connected to the frame 1 for cleaning and replacement.
The operation method of the molding system according to this embodiment includes the following steps:
a. starting the steel belt 2 to circularly rotate along the horizontal direction, starting the heater 4 to heat the steel belt 2, setting the temperature of the steel belt 2 to be 40 ℃, controlling the slurry in the slurry box 3 to flow out of the slurry outlet 32 through the cutter door 31 after the temperature of the steel belt 2 reaches the set temperature, and drying the flowing slurry through the steel belt 2 to form a reconstituted tobacco sheet;
b. the thickness of the reconstituted tobacco sheets is adjusted through a leveling device 5, and when the thickness of the steel belt 2 and the thickness of the reconstituted tobacco sheets on the steel belt 2 are larger than the set thickness, an upper press roller 51 and a lower support roller 52 of the leveling device 5 are matched with each other to roll the reconstituted tobacco sheets on the steel belt 2;
c. the scraper 6 peels off the reconstituted tobacco sheet with the moisture content of 12% -14% on the steel belt 2 from the steel belt 2, and the peeled reconstituted tobacco sheet is conveyed to the winding table 71 and wound on the winding shaft 72 for winding.
In step b, the distance between the upper press roll 51 and the lower carrier roller 52 in the direction perpendicular to the steel strip 2 is set to be 10mm, and the distance between the upper press roll 51 and the steel strip 2 in the perpendicular direction is set to be 6 mm.
Claims (9)
1. A forming system for preparing reconstituted tobacco sheets by a tape casting method is characterized by comprising the following steps: a frame (1), a steel belt (2), and a head box (3), a heater (4), a leveling device (5), a scraper (6) and a winding device (7) which are arranged in sequence,
a gear (21) arranged on the rack (1) drives the steel belt (2) to circularly operate;
the head box (3) is arranged at the upper part of the steel belt (2), the head box (3) can store slurry, the head box (3) is provided with a slurry outlet (32) which faces the steel belt (2) and can convey the slurry onto the steel belt (2) through the slurry outlet (32), and a knife gate (31) is arranged at the slurry outlet (32);
the heater (4) is positioned at the lower part of the steel belt (2) and can heat the slurry on the steel belt (2);
the leveling device (5) comprises an upper pressing roller (51) and a lower supporting roller (52), the upper pressing roller (51) is positioned at the upper part of the steel strip (2), and the lower supporting roller (52) is positioned at the lower part of the steel strip (2);
the scraper (6) is arranged on the rack (1) and is in contact with the steel belt (2);
the winding device (7) is arranged on the outer side of the rack (1) and comprises a winding table (71) and a winding shaft (72).
2. The forming system according to claim 1, characterized in that the knife gate (31) is adjusted in a direction perpendicular to the steel strip (2), and the knife gate (31) is spaced from the steel strip (2) by a distance of 1-3mm in the direction perpendicular to the steel strip (2) in order to control the thickness of the outflowing pulp.
3. The molding system according to claim 1, wherein the upper press roll (51) is used for pressing the steel belt (2) and the slurry on the steel belt (2) from the upper part, the lower idler (52) is used for supporting the steel belt (2) and the slurry on the steel belt (2) from the lower part, and the upper press roll (51) and the lower idler (52) rotate towards each other to push the steel belt (2) and the slurry on the steel belt (2) to pass through a gap between the upper press roll (51) and the lower idler (52), so that the thickness of the reconstituted tobacco sheet obtained after the slurry is dried is adjusted.
4. The molding system according to claim 1, wherein the upper press roll (51) and the lower carrier roll (52) are connected to the frame (1) by a screw and a fastening nut, and the upper press roll (51) and the lower carrier roll (52) are spaced apart by 10 to 15mm in a direction perpendicular to the steel strip (2), and the upper press roll (51) and the steel strip (2) are spaced apart by 5 to 7mm in the perpendicular direction.
5. The molding system according to claim 1, wherein the horizontal angle of the scraper (6) to the steel belt (2) is 30 ° -45 ° so that the scraper (6) can separate the prepared reconstituted tobacco sheet from the steel belt.
6. Moulding system according to claim 1, characterized in that the doctor blade (6) is detachably connected to the machine frame (1) for cleaning and replacement.
7. The forming system according to claim 1, characterized in that the steel strip (2) is circulated in a horizontal direction.
8. A method of operating a molding system according to claim 1, comprising the steps of:
a. starting the steel belt (2) to circularly operate, starting the heater (4) to heat the steel belt (2), setting the temperature of the steel belt (2) to be 30-50 ℃, controlling the slurry in the head box (3) to flow out from the slurry outlet (32) through the knife gate (31) after the temperature of the steel belt (2) reaches the set temperature, and drying the flowing slurry through the steel belt (2) to form a reconstituted tobacco sheet;
b. the thickness of the reconstituted tobacco sheets is adjusted through a flattening device (5), when the thickness of the steel belt (2) and the thickness of the reconstituted tobacco sheets on the steel belt (2) are larger than a set thickness, an upper pressing roller (51) and a lower supporting roller (52) of the flattening device (5) are matched with each other, and the reconstituted tobacco sheets on the steel belt (2) are pressed;
c. the scraper (6) peels off the reconstituted tobacco sheet on the steel belt (2) from the steel belt (2), and the peeled reconstituted tobacco sheet is conveyed to a winding table (71) and wound on a winding shaft (72) for winding.
9. Operating method according to claim 7, characterised in that in step b the upper press roll (51) and the lower idler (52) are set at a distance of 10-15mm in the direction perpendicular to the steel strip (2), and the upper press roll (51) and the steel strip (2) are set at a distance of 5-7mm in the perpendicular direction.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911096516.XA CN110693067B (en) | 2019-11-11 | 2019-11-11 | Forming system for preparing reconstituted tobacco sheets by casting method and operation method of forming system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911096516.XA CN110693067B (en) | 2019-11-11 | 2019-11-11 | Forming system for preparing reconstituted tobacco sheets by casting method and operation method of forming system |
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| CN110693067A true CN110693067A (en) | 2020-01-17 |
| CN110693067B CN110693067B (en) | 2023-06-20 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111657532A (en) * | 2020-05-22 | 2020-09-15 | 苏州东福来机电科技有限公司 | Reconstituted tobacco coating and calendering production line and production process |
| CN112273702A (en) * | 2020-11-10 | 2021-01-29 | 苏州东福来机电科技有限公司 | Process and production line for producing reconstituted tobacco by calendering method |
| CN112641127A (en) * | 2021-01-18 | 2021-04-13 | 河南中烟工业有限责任公司 | Control method for automatically adjusting thickness of tobacco sheet |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111657532A (en) * | 2020-05-22 | 2020-09-15 | 苏州东福来机电科技有限公司 | Reconstituted tobacco coating and calendering production line and production process |
| CN111657532B (en) * | 2020-05-22 | 2023-08-15 | 苏州东福来机电科技有限公司 | Reconstituted tobacco coating and calendaring production line and production process |
| CN112273702A (en) * | 2020-11-10 | 2021-01-29 | 苏州东福来机电科技有限公司 | Process and production line for producing reconstituted tobacco by calendering method |
| CN112273702B (en) * | 2020-11-10 | 2023-09-05 | 苏州东福来机电科技有限公司 | Process and production line for producing reconstituted tobacco by calendaring method |
| CN112641127A (en) * | 2021-01-18 | 2021-04-13 | 河南中烟工业有限责任公司 | Control method for automatically adjusting thickness of tobacco sheet |
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| Publication number | Publication date |
|---|---|
| CN110693067B (en) | 2023-06-20 |
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