CN112515230A - Constant-state pulp distribution forming device for reconstituted tobacco by thick pulp method special for heating cigarettes - Google Patents
Constant-state pulp distribution forming device for reconstituted tobacco by thick pulp method special for heating cigarettes Download PDFInfo
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- CN112515230A CN112515230A CN202011457647.9A CN202011457647A CN112515230A CN 112515230 A CN112515230 A CN 112515230A CN 202011457647 A CN202011457647 A CN 202011457647A CN 112515230 A CN112515230 A CN 112515230A
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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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- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
- A24B15/00—Chemical features or treatment of tobacco; Tobacco substitutes, e.g. in liquid form
- A24B15/10—Chemical features of tobacco products or tobacco substitutes
- A24B15/12—Chemical features of tobacco products or tobacco substitutes of reconstituted tobacco
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Abstract
The invention discloses a constant slurry distribution forming device for reconstituted tobacco by a thick slurry method special for heating cigarettes, which comprises a follow-up tape casting forming unit (1), a curtain type feeding unit (2) and a release agent roller coating unit (3); the follow-up type casting forming unit (1) comprises a frame (11), a casting box (13), a forming steel belt (14) and a hub (17); the curtain type feeding unit (2) comprises a thick slurry buffer tank (21), a thick slurry discharging pipe (22) and a thick slurry feeding pipe (23); the release agent coating unit (3) comprises a coating roller (31), a release agent trough (32) and a release agent feeding pipe (33). The invention can realize stable casting of thick paste, improve the stability of the longitudinal thickness and the quantification of the tobacco leaves reconstituted by the thick paste method and the thick paste film, avoid the hole breaking of the tobacco leaves reconstituted by the thick paste method and the thick paste film caused by the blockage of the bottom of the scraper by the fiber mass, improve the paper forming rate of the tobacco leaves reconstituted by the thick paste method, and meet the requirements of heating cigarette cigarettes on the stability of the thickness and the quantification of the tobacco leaves reconstituted by the thick paste method.
Description
Technical Field
The invention belongs to the technical field of reconstituted tobacco production and processing, and particularly relates to a constant slurry distribution forming device for reconstituted tobacco by a thick slurry method special for heating cigarettes.
Background
The thick paste water content of the tobacco leaf reconstituted by the thick paste method is high (about 80%), so that the thick paste has high fluidity, the tobacco raw materials, the added fibers, the adhesive and the smoke agent in the thick paste have good dispersibility, and the prepared tobacco leaf reconstituted by the thick paste method has the characteristics of high homogenization, adjustable processing resistance and good heat conduction uniformity and is one of the main reasons for being used as a tobacco section material of a heating cigarette. A representative segment of tobacco material for a heated cigarette- -Felmo's IQOS (Intercore heating) product is a thick stock reconstituted tobacco.
The thick paste of the tobacco leaves reproduced by the thick paste method has high water content, thereby not only bringing the advantage of good dispersibility of the thick paste, but also bringing the disadvantages that the fibers in the thick paste are easy to agglomerate and settle and the thickness of the formed paste film has larger fluctuation. Therefore, the problem of stable formation of thick paste with high water content is always the focus of research. Such as: CN106998785A discloses an "apparatus for producing cast web of homogenized tobacco material", which mainly controls the difference between the steel strip temperature and the temperature of the thick stock in the casting box, preferably by 0-15 c, more preferably by 0-7 c, while preventing thermal shock, causing sudden expansion or contraction of the pulp film. CN201911097166.9 discloses a forming and drying system for reconstituted tobacco leaves by thick paste method special for cigarettes without burning, which mentions that the thick paste is cast and formed by a casting box, sheets of the reconstituted tobacco leaves by thick paste method are dried and stripped, the thickness is finely adjusted by a thickness adjusting roller, and the casting system is not developed specifically. CN 109700067 a discloses a thick paste sheet forming machine and an operation method thereof, which discloses a thick paste sheet forming machine, wherein a casting box is arranged above a hub, and the thick paste is cast and formed through a gap between a scraper and a steel belt in the casting box. Patent CN106998784A of Felmo tobacco corporation in China discloses a casting device for casting a web for producing homogenized tobacco materials, which is provided with a removing scraper for removing caked pulp films formed in thick pulp and then adjusting the gap between the scraper and a steel belt so as to realize the method for accurately adjusting the thickness of reconstituted tobacco leaves by a thick pulp method.
The tape casting case of above patent all is fixed in the frame, and thick paste is carried directly through the pump and is carried the preparation of thick paste method reconstituted tobacco in the tape casting case, and the complete strip of the steel band of the quick operation of thick paste method reconstituted tobacco is simultaneously convenient for thick paste method reconstituted tobacco, what adopted is that the mode of spraying coats the release agent on the steel band, above technology, but has following shortcoming when thick paste tape casting is formed:
(1) in the tape casting process of the reconstituted tobacco by the thick paste method, the fluctuation of the gap between the steel belt and the scraper is caused by the thickness deviation of the formed steel belt and the circumferential runout of the hub, so that the thickness and quantitative fluctuation of the prepared pulp membrane and the reconstituted tobacco in the longitudinal direction are larger.
(2) The thick paste is directly conveyed to the casting box through one conveying pipe or a plurality of conveying pipes without buffering, so that the transverse height and the pressure of the thick paste in the casting box are inconsistent, and the prepared pulp membrane and the reconstituted tobacco have larger transverse thickness and quantitative fluctuation.
(3) During tape casting of thick slurry, only one scraper is usually used, and the instantaneous operation pressure for treating a slurry film is higher; and in the rapid (10-30m/min) operation process of the steel belt, thick paste in the casting box is easy to roll, fibers in the thick paste are easy to agglomerate and block the bottom of a scraper, and further the prepared pulp membrane and the thick paste method reconstituted tobacco are easy to break.
(4) The release agent has influence on the sensory quality of reconstituted tobacco leaves by a thick paste method, so the use amount of the release agent needs to be controlled, and the release agent is sprayed on a steel belt by adopting a spraying process, so that the phenomenon of non-uniformity is easy to occur, and when the thick paste is coated on the steel belt sprayed with the release agent, the non-uniformity of the thickness of a pulp film and the reconstituted tobacco leaves and the fluctuation of the sensory quality are caused.
In conclusion, the filling degree of the heated cigarette is not uniform, and the smoking resistance and the weight fluctuation of the cigarette are larger.
Therefore, the stability of the thickness of the thick paste method reconstituted tobacco is further improved, and the homogenization of the thick paste method reconstituted tobacco is ensured.
The present invention has been made to solve the above problems.
Disclosure of Invention
The invention develops a constant slurry distribution forming system of thick slurry method reconstituted tobacco special for heating cigarettes, which can realize stable casting of thick slurry, improve the stability of the prepared slurry film and thick slurry method reconstituted tobacco in longitudinal thickness and quantification, avoid the hole breakage of the slurry film and thick slurry method reconstituted tobacco due to the blockage of the bottom of a scraper by fiber clusters, and improve the paper forming rate of the thick slurry method reconstituted tobacco.
The invention provides a constant state slurry distribution forming device for reconstituted tobacco leaves by a thick slurry method special for heating cigarettes, which comprises a follow-up type tape casting forming unit 1, a curtain type feeding unit 2 and a release agent roller coating unit 3;
the follow-up type casting forming unit 1 comprises a frame 11, a casting box 13, a formed steel belt 14 and a hub 17; the hub 17 is fixed on the frame 11, and the formed steel strip 14 moves downstream along with the rotation of the hub 17; the side wall of the casting box 13 is a casting box side plate 12, the casting box 13 is placed on the formed steel strip 14 through the casting box side plate 12, and the casting box 13 can slightly float up and down along with the formed steel strip 14 in the vertical direction; a casting blade 16 is arranged at the thick slurry outlet of the casting box 13, and a certain gap is formed between the casting blade 16 and the formed steel strip 14;
the curtain type feeding unit 2 comprises a thick slurry buffer tank 21, a thick slurry discharging pipe 22 and a thick slurry feeding pipe 23, and a certain gap is formed between the outlet of the thick slurry buffer tank 21 and the rear wall of the casting box 13 at the upstream end;
the release agent coating unit 3 comprises a coating roller 31, a release agent trough 32 and a release agent feeding pipe 33; the coating roller 31 is driven by the formed steel strip 14 to rotate in the same direction, and the amount of the release agent coated is adjusted by adjusting the pressure between the coating roller 31 and the formed steel strip 14.
Wherein, the slight floating up and down means that the floating range is very small in the vertical direction (namely the vertical direction of the horizontal forming steel strip), the casting box 13 can float up and down along with the forming steel strip 14 in the vertical direction, and the floating range is 0-0.5 mm;
preferably, the casting blades 16 are two, respectively a first casting blade 161 away from the moving direction of the formed steel strip 14 and a second casting blade 162 close to the moving direction of the formed steel strip 14; the lower end surface of the second casting blade 162 is arc-shaped, the lower end surface of the first casting blade 161 may be diagonal or arc-shaped, and when the lower end surface of the first casting blade 161 is diagonal, the included angle between the lower end surface of the first casting blade 161 and the formed steel strip 14 is 10-90 °.
Preferably, a first gap is formed between the first casting blade 161 and the formed steel strip 14, a second gap is formed between the second casting blade 162 and the formed steel strip 14, and the first gap is 0-7 mm; the second gap is 0-5 mm; more preferably, the first gap is 1-1.2 mm; the second gap is 0.7-1mm, wherein the first gap and the second gap are adjusted according to the thick slurry concentration and the running speed of the formed steel strip 14, when the thick slurry concentration is high and the speed of the formed steel strip 14 is high, the first gap and the second gap are lower, and otherwise, the first gap and the second gap are higher. The first gap is greater than 20% of the second gap.
The invention provides two casting blades in the casting box, which adopts a double-blade mode, wherein a first gap between a first casting blade 161 and the formed steel strip 14 is 20% higher than a second gap between a second casting blade 162 and the formed steel strip 14. The reconstituted tobacco thick paste is treated by a first casting scraper 161, fibers in the thick paste are primarily finished or larger fiber clusters are firstly filtered; the pulp membrane preliminarily prepared by the first casting scraper 161 is accurately coated and finished by the second casting scraper 162, so that the problem that the pulp membrane and the thick pulp reconstituted tobacco are broken due to the fact that the bottom of the scraper is blocked by fiber clusters is avoided, and the paper forming rate of the thick pulp reconstituted tobacco is improved. Furthermore, the lower end face of the second casting scraper 162 is arc-shaped, so that the stable casting thickness of the thick paste is further ensured, and the stability of the thickness of the reconstituted tobacco leaf by the thick paste method is improved.
Preferably, a third gap is formed between the outlet of the thick slurry buffer groove 21 and the casting box side plate 12 at the upstream end, and the third gap is 0.10-0.30 mm. More preferably, the gap between the outlet of the thick stock buffer tank 21 and the rear wall of the casting box 13 is 0.15 mm.
The present invention develops a curtain feed unit. The thick paste enters the thick paste buffer tank 21 above the casting box firstly, and then the thick paste is cast from the thick paste buffer tank 21 along the rear wall of the casting box 13 in a waterfall-like 'water curtain' manner, so that the impact of the thick paste in the casting box caused by the fact that the thick paste is directly fed into the casting box through one or more delivery pipes without buffering in the prior art is avoided, the consistency of the transverse height and pressure of the thick paste in the casting box is kept, and the transverse thickness and the quantitative stability of the thick paste film prepared by the thick paste method and the reconstituted tobacco leaves are kept.
Preferably, an adjusting handwheel 15 is provided above the casting box 13, and the gap between the casting blade 16 and the formed steel strip 14 can be adjusted by the adjusting handwheel 15.
Preferably, the longitudinal sections of the formed steel strip 14 and the hub 17 are provided with an upper tangent point and a lower tangent point, the casting box 13 is installed on one side of the upper tangent point of the hub 17 opposite to the moving direction of the formed steel strip 14, and an included angle between a connecting line of the casting scraper 16 and the center of the hub 17 and a connecting line of the upper tangent point and the center of the hub 17 in the longitudinal section of the casting box 1 is 8-20 degrees; at the position, the tension of the formed steel belt 14 is large, the formed steel belt 14 is relatively flat, and the thickness uniformity of the cast slurry film is good.
The casting box 13 can float up and down along with the formed steel strip 14 in the vertical direction, and the floating range is 0-0.5 mm.
Preferably, the thermal expansion coefficient of the material of the casting scraper 3 is less than or equal to 1.5 multiplied by 10 at the temperature of 20-100 DEG C-6/° c; the reason for limiting the coefficient of thermal expansion of the material of the casting blade 16 here is that the temperature of the reconstituted tobacco thick stock in the casting box is usually around 60 ℃, which would result in a casting blade if the coefficient of thermal expansion of the material of the casting blade 16 is too highThe blade 16 is deformed by heat, resulting in non-uniform thickness of the lamina of the reconstituted tobacco. The casting box side plate 12 is made of a low-friction coefficient material, and the friction coefficient is less than or equal to 0.15; such as perfluoroalkoxy resins, polytetrafluoroethylene, and the like. The casting box 13 of the device is directly placed on the forming steel belt 14 and is in contact with the forming steel belt 14 through the casting box side plate 12, and due to the fact that the friction coefficient of the casting box side plate 12 is low, the casting box 13 cannot move downstream along with the forming steel belt 14 when moving up and down along with the forming steel belt 14 in the vertical direction. The gap between the casting scraper 16 and the formed steel strip 14 can be adjusted by an adjusting hand wheel 15, and the displacement adjusting precision of the adjusting hand wheel 2 is less than or equal to 0.05 mm.
Preferably, the casting box 13 is connected with the frame 11 on the side departing from the moving direction of the formed steel strip 14, so that the casting box 13 does not move downstream along with the formed steel strip 14.
Preferably, the coating roller 31 is a driven roller made of food-grade silicon rubber; adjusting the amount of release agent applied by adjusting the pressure between the application roller 31 and the formed steel strip 14, the pressure being in the range of 0-0.5Mpa, more preferably 0.30 Mpa; the applicator roll 31 is immersed in the mold release agent tank 32 to a depth of 0 to 40cm, and not 0, more preferably 15 cm.
The invention develops a roller coating process unit of a release agent. The release agent is uniformly coated on the steel belt by adopting a roller coating process, so that the forming uniformity of the pulp membrane is improved, and the thickness stability of the reconstituted tobacco by the thick pulp method is ensured. The problem of in the prior art directly when spraying release agent to the steel band, the phenomenon that the release agent is inhomogeneous on the steel band that leads to the serosa and the inhomogeneous of reconstituted tobacco thickness is solved.
The invention provides a method for improving the thickness uniformity of reconstituted tobacco leaves by a thick paste method special for heating cigarettes.
The follow-up type reconstituted tobacco tape-casting forming device by the thick liquid method can be suitable for preparing reconstituted tobacco of reheated cigarettes.
Compared with the prior art, the invention has the following beneficial effects:
1. the invention overcomes the technical prejudice that the casting box 1 and the hub 17 are both fixed on the frame 11 in the prior art, only the hub 17 is fixed on the frame 11, the casting box 1 is placed on the formed steel belt 14, the formed steel belt 14 moves downstream along with the rotation of the hub 17, and the casting box 1 slightly floats up and down along with the formed steel belt 14 in the vertical direction because the casting box 1 is in direct contact with the formed steel belt 14, so that even when the thickness deviation of the formed steel belt and the circumferential runout of the hub occur, the gap between the casting scraper and the upper surface of the formed steel belt can be ensured to be stable and unchanged, the thickness of thick slurry casting tobacco leaves is kept stable, the stability of the thickness of the reconstituted tobacco leaves by the thick slurry method is improved, and the support resistance and the weight stability of the heated cigarettes are ensured.
2. The invention provides two casting blades in the casting box, which adopts a double-blade mode, wherein a first gap between a first casting blade 161 and the formed steel strip 14 is 20% higher than a second gap between a second casting blade 162 and the formed steel strip 14. Under the treatment of the first casting scraper 161, the thick pulp is preliminarily finished with fibers in the thick pulp or larger fiber clusters are filtered; the pulp membrane preliminarily prepared by the first casting scraper 161 is accurately coated and finished by the second casting scraper 162, so that the problem that the pulp membrane and the thick pulp reconstituted tobacco are broken due to the fact that the bottom of the scraper is blocked by fiber clusters is avoided, and the paper forming rate of the thick pulp reconstituted tobacco is improved. Furthermore, the lower end face of the second casting scraper 162 is arc-shaped, so that the stable casting thickness of the thick paste is further ensured, and the stability of the thickness of the reconstituted tobacco leaf by the thick paste method is improved.
4. The present invention develops a curtain feed unit. The thick paste enters the thick paste buffer groove 21 above the casting box, and then the thick paste is cast from the thick paste buffer groove 21 along the rear wall of the casting box 13 in a waterfall-like 'water curtain' manner, so that the impact on the thick paste in the casting box caused by directly feeding the thick paste into the casting box through one or more feed pipes in the prior art is avoided, the consistency of the transverse height and pressure of the thick paste in the casting box is kept, and the transverse thickness and the quantitative quantity of the prepared thick paste film and the thick paste method reconstituted tobacco leaves are kept stable.
5. The invention develops a roller coating process unit of a release agent. The release agent is uniformly coated on the steel belt by adopting a roller coating process, so that the forming uniformity of the pulp membrane is improved, and the thickness stability of the reconstituted tobacco by the thick pulp method is ensured. The problem of in the prior art directly when spraying release agent to the steel band, the phenomenon that the release agent is inhomogeneous on the steel band that leads to the serosa and the inhomogeneous of reconstituted tobacco thickness is solved.
6. According to the follow-up type reconstituted tobacco tape casting forming device adopting the thick liquid method, the tape casting box side plate 12 is made of a material with a low friction coefficient, and the friction coefficient is less than or equal to 0.15. The casting box 13 of the device is directly placed on the forming steel belt 14 and is in contact with the forming steel belt 14 through the casting box side plate 12, and due to the fact that the friction coefficient of the casting box side plate 12 is low, the casting box 13 cannot move downstream along with the forming steel belt 14 when slightly floating up and down along with the forming steel belt 14 in the vertical direction.
7. The follow-up type thick slurry method reconstituted tobacco tape casting forming device is provided with an adjusting hand wheel 5, and the gap between the tape casting scraper 6 and the forming steel belt 14 can be manually adjusted through the adjusting hand wheel 5.
8. In a preferred embodiment of the invention, the casting box 13 is connected to the frame 11 on the side facing away from the direction of movement of the formed steel strip 14, further ensuring that the casting box 13 does not move downstream with the formed steel strip 14.
9. In the follow-up type thick slurry reconstituted tobacco tape casting forming device, the longitudinal sections of the forming steel belt 14 and the hub 17 are provided with an upper tangent point and a lower tangent point, the tape casting box 1 is arranged on one side of the upper tangent point of the hub 17, which is opposite to the moving direction of the forming steel belt 14, and the included angle between the connecting line of the casting scraper 6 and the center of the hub 17 in the longitudinal section of the tape casting box 1 and the connecting line of the upper tangent point and the center of the hub 17 is 8-20 degrees. At the position, the tension of the formed steel belt 14 is large, the formed steel belt 14 is relatively flat, and the thickness uniformity of the cast slurry film is good.
10. In the follow-up type reconstituted tobacco tape-casting forming device by thick liquid method, the thermal expansion coefficient of the material of the tape-casting scraper 3 is less than or equal to 1.5 multiplied by 10 at the temperature of 20-100 DEG C-6V. C. The reason why the thermal expansion coefficient of the material of the casting blade 3 is defined here is that the temperature of the thick stock in the casting box is usually around 60 ℃, and if the thermal expansion coefficient of the material of the casting blade 3 is too high, the casting blade 3 is deformed by heat, thereby causing the thickness of the reconstituted tobacco pulp film to be uneven.
Drawings
FIG. 1 is a schematic structural diagram of a follow-up tape casting unit 1 in a constant slurry distribution forming device for heating tobacco leaves reconstituted by a thick slurry method special for cigarettes;
FIG. 2 is a longitudinal sectional view of the mounting positions of the curtain feed unit 2, the casting blade 16, the casting box 13, the formed steel strip 14 and the hub 17 of the present invention;
FIG. 3 is a schematic view of the positional relationship between the casting blade 16 and the formed steel strip 14 according to the present invention;
FIG. 4 is a schematic structural view of a curtain type feeding unit 2 in the constant state pulp distribution forming device for the reconstituted tobacco by the thick pulp method special for the heated cigarette;
FIG. 5 is a schematic structural diagram of a release agent roller coating unit 3 in the steady state slurry distribution forming device for the reconstituted tobacco by the thick slurry method special for the heated cigarette;
the names of the reference symbols in the description of the drawings are: the device comprises a 1-follow-up type casting forming unit, a 2-curtain type feeding unit, a 3-demolding agent roller coating unit, a 11-frame, a 12-casting box side plate, a 13-casting box, a 14-formed steel strip, a 15-adjusting hand wheel, a 16-casting scraper, a 17-wheel hub, a 21-thick slurry buffer tank, a 22-thick slurry discharging pipe, a 23-thick slurry feeding pipe, a 31-coating roller, a 32-demolding agent trough, a 33-demolding agent feeding pipe, a 161-first casting scraper and a 162-second casting scraper.
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.
As shown in fig. 1-5, the present embodiment provides a steady state slurry distribution forming device for reconstituted tobacco by thick slurry method special for heating cigarette, which includes a following type tape casting forming unit 1, a curtain type feeding unit 2, a roller coating unit 3 of releasing agent;
the follow-up type casting forming unit 1 comprises a frame 11, a casting box 13, a formed steel belt 14 and a hub 17; the hub 17 is fixed on the frame 11, and the formed steel strip 14 moves downstream along with the rotation of the hub 17; the side wall of the casting box 13 is a casting box side plate 12, the casting box 13 is placed on the formed steel strip 14 through the casting box side plate 12, and the casting box 13 can slightly float up and down along with the formed steel strip 14 in the vertical direction; a casting blade 16 is arranged at the thick slurry outlet of the casting box 13, and a certain gap is formed between the casting blade 16 and the formed steel strip 14;
the curtain type feeding unit 2 comprises a thick slurry buffer tank 21, a thick slurry discharging pipe 22 and a thick slurry feeding pipe 23, and a certain gap is formed between the outlet of the thick slurry buffer tank 21 and the rear wall of the casting box 13 at the upstream end;
the release agent coating unit 3 comprises a coating roller 31, a release agent trough 32 and a release agent feeding pipe 33; the coating roller 31 is driven by the formed steel strip 14 to rotate in the same direction, and the amount of the release agent coated is adjusted by adjusting the pressure between the coating roller 31 and the formed steel strip 14.
Wherein, the slight floating up and down means that the floating range is very small in the vertical direction (namely the vertical direction of the horizontal forming steel strip), the casting box 13 can float up and down along with the forming steel strip 14 in the vertical direction, and the floating range is 0-0.5 mm;
the two casting blades 16 are respectively a first casting blade 161 far away from the moving direction of the formed steel strip 14 and a second casting blade 162 close to the moving direction of the formed steel strip 14; the lower end surface of the second casting blade 162 is arc-shaped, the lower end surface of the first casting blade 161 is oblique, and the included angle α between the lower end surface of the first casting blade 161 and the formed steel strip 14 is 60 °.
In fig. 3, a casting blade whose lower end face is a diagonal line type and a casting blade whose lower end face is a circular arc shape are shown, respectively.
A first gap is formed between the first casting blade 161 and the formed steel strip 14, a second gap is formed between the second casting blade 162 and the formed steel strip 14, and the first gap is 1 mm; the second gap is 0.8 mm.
The invention provides two casting blades in the casting box, which adopts a double-blade mode, wherein a first gap between a first casting blade 161 and the formed steel strip 14 is 20% higher than a second gap between a second casting blade 162 and the formed steel strip 14. Under the treatment of the first casting scraper 161, the thick pulp is preliminarily finished with fibers in the thick pulp or larger fiber clusters are filtered; the pulp membrane preliminarily prepared by the first casting scraper 161 is accurately coated and finished by the second casting scraper 162, so that the problem that the pulp membrane and the thick pulp reconstituted tobacco are broken due to the fact that the bottom of the scraper is blocked by fiber clusters is avoided, and the paper forming rate of the thick pulp reconstituted tobacco is improved. Furthermore, the lower end face of the second casting scraper 162 is arc-shaped, so that the stable casting thickness of the thick paste is further ensured, and the stability of the thickness of the reconstituted tobacco leaf by the thick paste method is improved.
And a third gap is formed between the outlet of the thick slurry buffer groove 21 and the casting box side plate 12 at the upstream end, and the third gap is 0.15 mm.
The present invention develops a curtain feed unit. The thick paste enters the thick paste buffer tank 21 above the casting box firstly, and then the thick paste is cast from the thick paste buffer tank 21 along the rear wall of the casting box 13 in a waterfall-like 'water curtain' manner, so that the impact of the thick paste in the casting box caused by the fact that the thick paste is directly fed into the casting box through one or more delivery pipes without buffering in the prior art is avoided, the consistency of the transverse height and pressure of the thick paste in the casting box is kept, and the transverse thickness and the quantitative stability of the thick paste film prepared by the thick paste method and the reconstituted tobacco leaves are kept.
An adjusting hand wheel 15 is arranged above the casting box 13, and the gap between the casting scraper 16 and the formed steel strip 14 can be adjusted through the adjusting hand wheel 15.
The longitudinal sections of the formed steel strip 14 and the hub 17 are provided with an upper tangent point and a lower tangent point, the casting box 13 is arranged on one side of the upper tangent point of the hub 17 opposite to the moving direction of the formed steel strip 14, and the included angle between the connecting line of the casting scraper 16 and the center of the hub 17 and the connecting line of the upper tangent point and the center of the hub 17 in the longitudinal section of the casting box 1 is 12 degrees; at the position, the tension of the formed steel belt 14 is large, the formed steel belt 14 is relatively flat, and the thickness uniformity of the cast slurry film is good.
The casting box 13 can float up and down along with the formed steel strip 14 in the vertical direction, and the floating range is 0-0.5 mm.
Preferably, the coating roller 31 is a driven roller made of food-grade silicon rubber; adjusting the coating amount of the release agent by adjusting the pressure between the coating roller 31 and the formed steel strip 14, wherein the pressure is 0.30 MPa; the applicator roll 31 was immersed in a mold release agent tank 32 to a depth of 15 cm.
The invention develops a roller coating process unit of a release agent. The release agent is uniformly coated on the steel belt by adopting a roller coating process, so that the forming uniformity of the pulp membrane is improved, and the thickness stability of the reconstituted tobacco by the thick pulp method is ensured. The problem of in the prior art directly when spraying release agent to the steel band, the phenomenon that the release agent is inhomogeneous on the steel band that leads to the serosa and the inhomogeneous of reconstituted tobacco thickness is solved.
As shown in fig. 2, the longitudinal section of the formed steel strip 14 and the hub 17 has an upper tangent point and a lower tangent point, the casting box 1 is installed on the side of the upper tangent point of the hub 17 opposite to the moving direction of the formed steel strip 14, and the included angle between the connecting line of the casting blade 6 and the center of the hub 17 and the connecting line of the upper tangent point and the center of the hub 17 in the longitudinal section of the casting box 1 is 12 °.
Claims (10)
1. A constant slurry distribution forming device for reconstituted tobacco by a thick slurry method special for heating cigarettes is characterized by comprising a follow-up tape casting forming unit (1), a curtain type feeding unit (2) and a release agent roller coating unit (3);
the follow-up type casting forming unit (1) comprises a frame (11), a casting box (13), a forming steel belt (14) and a hub (17); the hub (17) is fixed on the frame (11), and the formed steel strip (14) moves downstream along with the rotation of the hub (17); the side wall of the casting box (13) is a casting box side plate (12), the casting box (13) is placed on the forming steel strip (14) through the casting box side plate (12), and the casting box (13) can float up and down along with the forming steel strip (14) in the vertical direction; a casting scraper (16) is arranged at the thick slurry outlet of the casting box (13), and a certain gap is formed between the casting scraper (16) and the formed steel strip (14);
the curtain type feeding unit (2) comprises a thick slurry buffer tank (21), a thick slurry discharging pipe (22) and a thick slurry feeding pipe (23), and a certain gap is formed between the outlet of the thick slurry buffer tank (21) and the casting box side plate (12) at the upstream end;
the release agent coating unit (3) comprises a coating roller (31), a release agent trough (32) and a release agent feeding pipe (33); the coating roller (31) is driven by the formed steel strip (14) to rotate in the same direction, and the coating amount of the release agent is adjusted by adjusting the pressure between the coating roller (31) and the formed steel strip (14).
2. The steady state slurry distribution forming device according to claim 1, wherein the number of the casting blades (16) is two, namely a first casting blade (161) far away from the moving direction of the formed steel strip (14) and a second casting blade (162) close to the moving direction of the formed steel strip (14).
3. The steady state slurry distribution forming device according to claim 2, wherein a first gap is formed between the first casting blade (161) and the formed steel strip (14), a second gap is formed between the second casting blade (162) and the formed steel strip (14), and the first gap is 0-7 mm; the second gap is 0-5 mm; and the first gap is greater than 20% of the second gap.
4. The steady state slurry distribution forming device according to claim 1, wherein a third gap is formed between the outlet of the thick slurry buffer groove (21) and the side plate (12) of the casting box at the upstream end, and the third gap is 0.10-0.30 mm.
5. The steady state slurry distribution forming device according to claim 1, wherein an adjusting hand wheel (15) is arranged above the casting box (13), and the gap between the casting scraper (16) and the formed steel belt (14) can be adjusted through the adjusting hand wheel (15).
6. The steady state slurry distribution forming device according to claim 1, wherein the longitudinal section of the formed steel belt (14) and the hub (17) is provided with an upper tangent point and a lower tangent point, the casting box (1) is installed on one side of the upper tangent point of the hub (17) opposite to the moving direction of the formed steel belt (14), and an included angle between a connecting line of the casting scraper (16) and the center of the hub (17) and a connecting line of the upper tangent point and the center of the hub (17) in the longitudinal section of the casting box (1) is 8-20 degrees; the casting box (13) can float up and down along with the formed steel belt (14) in the vertical direction, and the floating range is 0-0.5 mm.
7. The steady state slurry distribution forming device according to claim 1, wherein the thermal expansion coefficient of the material of the casting scraper (3) is less than or equal to 1.5 x 10 at 20-100 ℃-6/° c; the casting box side plate (12) is made of a low-friction coefficient material, and the friction coefficient of the casting box side plate is less than or equal to 0.15; the gap between the casting scraper (16) and the formed steel strip (14) can be adjusted through an adjusting hand wheel (15), and the displacement adjusting precision of the adjusting hand wheel (2) is less than or equal to 0.05 mm.
8. The steady state slurry distribution forming device according to claim 1, characterized in that one side of the casting box (13) departing from the moving direction of the forming steel strip (14) is connected with the frame (11), so that the casting box (13) does not move downstream along with the forming steel strip (14).
9. The steady state slurry distribution forming device according to claim 1, wherein the coating roller (31) is a driven roller and is made of food-grade silicon rubber; adjusting the coating amount of the release agent by adjusting the pressure between the coating roller (31) and the formed steel strip (14), wherein the pressure adjusting range is 0-0.5 Mpa; the coating roller (31) is immersed in the mold release agent tank (32) to a depth of 0-40cm and not 0.
10. A method for improving the thickness uniformity of reconstituted tobacco special for a heated cigarette is characterized in that the reconstituted tobacco special for the heated cigarette is prepared by using the constant state pulp distribution forming device of claims 1-9.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011457647.9A CN112515230A (en) | 2020-12-10 | 2020-12-10 | Constant-state pulp distribution forming device for reconstituted tobacco by thick pulp method special for heating cigarettes |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011457647.9A CN112515230A (en) | 2020-12-10 | 2020-12-10 | Constant-state pulp distribution forming device for reconstituted tobacco by thick pulp method special for heating cigarettes |
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| CN112515230A true CN112515230A (en) | 2021-03-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011457647.9A Pending CN112515230A (en) | 2020-12-10 | 2020-12-10 | Constant-state pulp distribution forming device for reconstituted tobacco by thick pulp method special for heating cigarettes |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114886138A (en) * | 2022-05-13 | 2022-08-12 | 江苏中烟工业有限责任公司 | Thick slurry liquid level regulation control system |
| CN115590237A (en) * | 2022-09-16 | 2023-01-13 | 杭州富阳宏立机械制造有限公司（Cn） | Open thick-pulp tobacco flake shaper |
| WO2023118204A3 (en) * | 2021-12-20 | 2023-09-07 | Nicoventures Trading Limited | A method of manufacturing a product comprising aerosol generating material |
| CN116746700A (en) * | 2023-07-27 | 2023-09-15 | 昆明旭邦机械有限公司 | Thick slurry method wafer tape casting device |
-
2020
- 2020-12-10 CN CN202011457647.9A patent/CN112515230A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023118204A3 (en) * | 2021-12-20 | 2023-09-07 | Nicoventures Trading Limited | A method of manufacturing a product comprising aerosol generating material |
| CN114886138A (en) * | 2022-05-13 | 2022-08-12 | 江苏中烟工业有限责任公司 | Thick slurry liquid level regulation control system |
| CN115590237A (en) * | 2022-09-16 | 2023-01-13 | 杭州富阳宏立机械制造有限公司（Cn） | Open thick-pulp tobacco flake shaper |
| CN116746700A (en) * | 2023-07-27 | 2023-09-15 | 昆明旭邦机械有限公司 | Thick slurry method wafer tape casting device |
| CN116746700B (en) * | 2023-07-27 | 2024-01-23 | 昆明旭邦机械有限公司 | Thick slurry method wafer tape casting device |
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