CN106235401B - Machine, method and coating device for producing filter rods for the tobacco processing industry - Google Patents
Machine, method and coating device for producing filter rods for the tobacco processing industry Download PDFInfo
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- CN106235401B CN106235401B CN201610400431.6A CN201610400431A CN106235401B CN 106235401 B CN106235401 B CN 106235401B CN 201610400431 A CN201610400431 A CN 201610400431A CN 106235401 B CN106235401 B CN 106235401B
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- additive
- volume flow
- return line
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- 239000011248 coating agent Substances 0.000 title claims abstract description 58
- 238000000576 coating method Methods 0.000 title claims abstract description 58
- 241000208125 Nicotiana Species 0.000 title claims abstract description 16
- 235000002637 Nicotiana tabacum Nutrition 0.000 title claims abstract description 16
- 238000012545 processing Methods 0.000 title claims abstract description 16
- 238000000034 method Methods 0.000 title claims abstract description 14
- 239000000654 additive Substances 0.000 claims abstract description 116
- 230000000996 additive effect Effects 0.000 claims abstract description 109
- 239000000463 material Substances 0.000 claims abstract description 32
- 239000007788 liquid Substances 0.000 claims abstract description 13
- 238000004519 manufacturing process Methods 0.000 claims abstract description 7
- 230000001105 regulatory effect Effects 0.000 claims description 14
- 239000007921 spray Substances 0.000 claims description 14
- 230000007246 mechanism Effects 0.000 claims description 13
- 238000003860 storage Methods 0.000 claims description 9
- 238000005086 pumping Methods 0.000 claims description 7
- 230000001276 controlling effect Effects 0.000 claims description 6
- 238000005259 measurement Methods 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 3
- 230000036962 time dependent Effects 0.000 claims description 3
- URAYPUMNDPQOKB-UHFFFAOYSA-N triacetin Chemical compound CC(=O)OCC(OC(C)=O)COC(C)=O URAYPUMNDPQOKB-UHFFFAOYSA-N 0.000 description 6
- 230000008859 change Effects 0.000 description 4
- 238000012544 monitoring process Methods 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 235000013773 glyceryl triacetate Nutrition 0.000 description 3
- 239000001087 glyceryl triacetate Substances 0.000 description 3
- 229960002622 triacetin Drugs 0.000 description 3
- 239000004902 Softening Agent Substances 0.000 description 2
- 229920002301 cellulose acetate Polymers 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 230000003111 delayed effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
- A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for cigars or cigarettes
- A24D3/02—Manufacture of tobacco smoke filters
- A24D3/0204—Preliminary operations before the filter rod forming process, e.g. crimping, blooming
- A24D3/0212—Applying additives to filter materials
- A24D3/022—Applying additives to filter materials with liquid additives, e.g. application of plasticisers
-
- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
- A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for cigars or cigarettes
- A24D3/02—Manufacture of tobacco smoke filters
- A24D3/0295—Process control means
-
- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24C—MACHINES FOR MAKING CIGARS OR CIGARETTES
- A24C5/00—Making cigarettes; Making tipping materials for, or attaching filters or mouthpieces to, cigars or cigarettes
- A24C5/32—Separating, ordering, counting or examining cigarettes; Regulating the feeding of tobacco according to rod or cigarette condition
- A24C5/34—Examining cigarettes or the rod, e.g. for regulating the feeding of tobacco; Removing defective cigarettes
- A24C5/345—Removing defective cigarettes
Landscapes
- Cigarettes, Filters, And Manufacturing Of Filters (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Coating Apparatus (AREA)
Abstract
The invention relates to a method for producing filter rods of the tobacco processing industry, in which method a filter material rod is unwound, sprayed with a liquid additive by at least one coating nozzle in the unwound state and subsequently shaped into a filter rod, wherein the additive is pumped from an additive reservoir to the at least one coating nozzle via an inflow line and the sprayed additive that is not absorbed by the filter material rod is returned to the additive reservoir via a return line. According to the invention, the inlet line volume flow of the additive in the inlet line and the return line volume flow of the additive in the return line are determined, and the difference in the volume flow of the additive is determined as the difference between the inlet line volume flow and the return line volume flow, which is used as a control variable for the additive-coated volume flow control device and is controlled in accordance with a predetermined or predeterminable setpoint volume flow.
Description
Technical Field
The invention relates to a method for producing a filter rod of the tobacco processing industry, in which method a filter rod of the tobacco processing industry is unwound, sprayed with a liquid additive by means of at least one coating nozzle in the unwound state and subsequently shaped into a filter rod, wherein the additive is pumped from an additive reservoir to the at least one coating nozzle in an inflow line, and the sprayed additive which is not absorbed by the filter rod is returned to the additive reservoir by means of a return line; and the invention relates to a corresponding coating device and machine for the tobacco processing industry.
Background
In the production of filter rods for the tobacco processing industry, filter material rods, generally filter strands composed of cellulose acetate, are removed from a supply as quasi-continuous rods and processed. The filter tow consists of a fabric of filaments loosely attached to one another, which are pulled apart from one another to form a wide and flat web. This deployment is performed by means of a deployment nozzle. After stretching and spreading, additives which are normally liquid and consist, for example, of softeners, for example triacetin, are fed to the web in finely distributed form. The droplets of softening agent partially dissolve the filaments so that the filaments are permanently attached to each other in the filter rod maker after they are combined into a circular filter rod and wrapped with the filter rod.
In the application of additives to filter material strips, the uniformity of the application is of great importance, since the amount of additive applied or added influences the filtration properties of the filters produced in this way. It must therefore be ensured that the amount of softener or additive contained in each filter remains constant over the time of production or within a predetermined tolerance.
It is known from DE 199 59,244 a1 to spray filter strands with an additive or softener in a row of nozzles arranged transversely to the direction of movement of the filter strands. In this case, the individual nozzles are controlled by means of sensors arranged upstream, which detect the density of the filter tow in the relevant section.
When using a coating nozzle, a constant pressure is alternatively also used in the supply line to the coating nozzle in order to continuously ensure the desired fine distribution of the droplets of the additive. In order to be able to control the amount of additive that is added to the filter material strand, DE 10 2005 015 877 A1, for example, discloses a device for achieving a uniform application of the softener to the applied filter tow by means of a spray nozzle with a constant delivery pressure of the additive or softener. The softener that is not absorbed by the filter tow is collected in a collection tank or trough. Furthermore, a cover plate is disclosed, by means of which the application surface can be enlarged or reduced by means of a displacement of the cover plate.
In order to check that the amount of additive in the individual filters remains constant over the production time, the individual filters have generally been removed in the form of samples and weighed until now, wherein several hours can elapse between the samples. In EP 1 935 261 B1 a more intimate monitoring is proposed, by: the certified containers are filled with a precisely defined amount of additive, the additive is removed from the containers and applied to the filter material strips by means of rotating brushes that absorb the additive and spray the additive in a finely distributed manner by rapid rotation. The unabsorbed additive is directed back into the container. The electronic sensor emits a signal below the upper feed level and below the lower feed level. The counting of the produced filters starts after the upper feed level is below and stops when the lower feed level is below, so that it is precisely known for how much filter a known volume of additive has been used. From this measurement, the average amount of additive per produced filter is determined. After being below the lower feed level, the volume is filled again and another measurement is started, so that the amount of additive in the produced filter is periodically monitored.
Disclosure of Invention
In contrast, the object of the present invention is to further improve the monitoring of the addition of additives to the filter material strand.
This object is achieved by a method for producing a filter rod of the tobacco processing industry, in which a filter rod of the tobacco processing industry is unwound, sprayed with a liquid additive by means of at least one coating nozzle in the unwound state and subsequently shaped into a filter rod, wherein the additive is pumped from an additive reservoir to the at least one coating nozzle via an inflow line, and the sprayed additive which is not absorbed by the filter rod is returned to the additive reservoir via a return line. The improvement of the method is that the volume flow of the additive in the inflow pipeline is obtainedAnd the return line volume flow of the additive in the return lineAnd the volume flow rate of the additive is varied/>Determined as inflow line volumetric flow/>And return line volume flow/>The difference between the two is used as a control variable for the volume flow control device of the additive coating (Zusatzmittelauftrag) and is based on a predetermined or predeterminable target volume flow/>The difference is adjusted.
The invention is based on the following recognition: the transition from the amount of additive added, for example softener, in particular triacetin, to the volumetric flow of additive added enables a qualitative leap from periodic monitoring to continuous monitoring. In order to detect the added amount of additive, it is necessary to always integrate the amount of additive, so that the average added amount per filter can be detected only after a certain measurement duration. The volume flow is detected immediately or continuously, so that individual measurements can be assigned to each individual segmented filter rod. The additives are used cyclically, as in the prior art, by: additive is fed from the additive storage container to the coating nozzle via the inflow line, and additive which is not absorbed by the filter material strand is collected and returned to the additive storage container via a return line. The additive absorbed by the filter material strand and removed forms a volume flow, which in the case of equilibrium is the difference between the inlet line volume flow and the return line volume flow.
In the volume flow control device, a target volume flow is used as a target value for the control variable, i.e. the volume flow difference. For this purpose, the absolute value of the feed height in the collection container or in the additive storage container or in the intermediate container is not of primary importance.
An advantageous development provides for the feed level height to be adjusted additionally in a feed level container arranged upstream of or in the return line, with the aim of: time-wise derivative of a time-wise curve of the feed level height in the feed level vesselVanishing, wherein for the inflow line volumetric flow/>And/or return line volumetric flow/>And controlling. For the second adjustment, the absolute value of the feed level height in the feed level container is likewise not important, but only the change in the feed level height over time, which should be lost. Thus, the constancy of the feed level height is important, not the specific value of the feed level height. The feed level height in the feed level container is constant, so that it is ensured that the volume flow difference representing the adjustment of the volume flow adjustment device corresponds exactly to the volume flow of the additive carried away with the filter material strand.
Even in the case of a change in the feed level height, the adjustment quantity-volume flow difference for the volume flow control device can be determined from the change in the feed level height, i.e. from the derivative of the feed level height at the first time pointAnd thus the adjustment is adapted to this.
For the volume flow of the return lineControl is preferably effected by adjusting the proportional valve in the return line or the pumping speed of the return pump in the return line. This has the following advantages: the inflow line can be operated with a constant pumping speed or with a constant pumping pressure for ensuring that the additive is atomized or sprayed as uniformly as possible in the at least one coating nozzle. Thus, for the feed level height adjustment, the control of the volume flow in the return line is more suitable than the control of the volume flow in the inflow line. In other cases, good spraying results are also ensured if the inlet line volume flows are not identical, which can also be controlled for this purpose in these cases. This is generally the case within a certain tolerance.
In an advantageous development, the amount of additive added to the filter material strand is controlled by means of a sheet which can be pushed at least partially into the spray cone produced by the at least one coating nozzle. By pushing the sheet into the spray cone of the at least one application nozzle, the surface is reduced xiao Tu, thereby increasing the amount of additive that is not absorbed and must therefore be returned. The return line volume flow is correspondingly increased or the charge level in the charge level container is increased. The situation is reversed when the panel is pulled out. Accordingly, the control of the return line volume flow and, if appropriate, the intake line volume flow can be adjusted by the feed level height adjustment mechanism in order to achieve a constant feed level height adjustment target.
In both advantageous alternatives, which can also be used alternately according to the machine operating situation, it is provided that the volume flow regulating device is operated continuously at least in a section of the dynamic machine behavior in terms of time and/or in a section of the constant machine behavior in terms of time in a time-dispersed manner. "dynamic machine behavior" refers, for example, to starting and stopping of the machine. In these time-wise sections, the machine speed varies very drastically as does the machine temperature. The application conditions for the additives are thus also changed quite rapidly, so that a continuous adjustment of the volume flow is advantageous. The regulation according to the invention by volume flow is significantly better than the regulation by volume due to its speed, just during these times of dynamic machine behaviour. In the time-dependent section of constant machine behavior, i.e. almost constant machine speed and other conditions, the computational effort can be reduced by: the volume flow regulating device is operated time-dispersed.
Advantageously from the difference in machine speed and volumetric flowAnd calculating the amount of additive per filter or per filter length or length unit in the filter rod, if necessary, in a predetermined filter rod length. The length units are, for example, centimeters of the filter rod.
It is further preferred to discharge insufficiently sprayed filters that have been sprayed at a point in time at which the volumetric flow rate is poorDeviating from the nominal volume flow/>, beyond a predetermined or predeterminable tolerance valueOr the calculated amount of additive per filter or per filter length or length unit in the filter rod exceeds a predetermined or can be predetermined tolerance value by a predetermined amount.
The volume flow regulating device is advantageously adjusted in such a way that the target volume flow of the additive is proportional to the machine speed. This is achieved by this: the amount of additive added to the filter material strip is not dependent on the machine speed.
The object of the invention is also achieved by a coating device for applying a liquid additive to an expanded filter material strand in the tobacco processing industry, comprising at least one coating nozzle, an additive reservoir, an inflow line, an inflow pump, and a return line, wherein the additive can be pumped from the additive reservoir via the inflow line or to the at least one coating nozzle by means of the inflow pump, wherein the additive which is not absorbed in the filter material strand can be returned to the additive reservoir by means of the return line, the improvement of the coating device being that it comprises an inflow line volume flow for the additive in the inflow lineInlet line measuring device for measuring and return line volume flow/>, for an additive in the return lineA return line measuring means for taking measurements and a volume flow regulating means configured for: difference in volumetric flow rate of the additiveDetermined as inflow line volumetric flow/>And return line volume flow/>The difference between them and is used as a regulating variable for the volume flow regulating device for additive application, and is based on a predetermined or predeterminable target volume flow/> Which is adjusted.
The features, advantages and characteristics of the method according to the invention described above are achieved in the same way by means of the coating device according to the invention. The volume flow regulating means is preferably a regulator having continuous characteristics, such as a P-regulator, PI-regulator or PID-regulator. The regulator may be constructed in an analog or digital configuration.
Preferably, a feed level container, in particular designed as a collecting tank, and a feed height adjustment mechanism, which is designed for: controlling the volume flow of the inflow pipelineAnd the return line volumetric flow/>The regulation targets are: time-wise derivative/>, of a time-wise curve of a feed level height in the feed level vesselAnd vanishes. The feed height adjustment mechanism is also a corresponding preferably continuous and linear regulator.
In an advantageous further development, a controllable proportional valve and/or a controllable return pump is arranged in the return line.
It is also advantageous to include a plate which can be pushed at least partially into the spray cone produced by the at least one coating nozzle in order to control the amount of additive added to the strip of filter material.
The inflow line measuring means and/or the return line measuring means are advantageously designed as volume flow measuring means or as rotational speed measuring means for a pump.
The coating device is preferably constructed and arranged to carry out the method according to the invention described above.
The object of the invention is finally also achieved by a machine of the tobacco processing industry having a coating device according to the invention as described above.
The machine has the same features, advantages and characteristics as the previously described subject matter of the invention thanks to the coating device according to the invention contained therein.
Preferably, a discharge means is included for discharging filter rods cut in sections from the filter rod, by means of which filter rods that have not been sufficiently sprayed can be discharged.
Other features of the present invention will be apparent from the following description of the embodiments according to the invention, taken in conjunction with the accompanying drawings. Individual features or combinations of features may be implemented according to embodiments of the invention.
Drawings
The invention is described below without limiting the general inventive concept by means of embodiments with reference to the drawings, in which reference is made explicitly to the drawings for all details according to the invention which are not explained in detail in the description. Wherein:
Fig. 1 shows a schematic view of a coating device according to the invention;
fig. 2 shows another embodiment of a coating device according to the invention; and
Fig. 3 shows a schematic view of another example of a coating device according to the invention.
In the figures, correspondingly identical or similar elements and/or components are provided with the same reference numerals, so that a renewed description is correspondingly omitted.
Detailed Description
Fig. 1 shows a schematic illustration of a coating device 10 according to the invention, wherein the adjustment mechanism has been omitted for reasons of simplicity. In connection with a cut-out of a machine, not shown, of the tobacco processing industry, in which an already unwound filter material strand 12 is transported in a transport direction 14 by means of two roller pairs 16, 18. Between the roller pairs 16 and 18, the filter material strand 12, for example cellulose acetate tow, is guided over a coating nozzle 22, which may also be a series of coating nozzles 22 arranged next to one another, which spray a spray cone 21 of liquid additive 20 shaped as a spray in the direction of the filter material strand 12, i.e. upwards. The additive may be, for example, a softening agent, such as triacetin. The volume flow of the additive 20 that is removed from the coating device 20 with the filter material strand 12 is denoted by reference numeral 24. This removed additive-volumetric flow 24 is desirably dosed in the following manner: so that as much additive 20 is present per unit length of the strip of filter material 12.
The coating nozzle 22 is arranged in an upwardly substantially closed container having a collecting trough 26 in which the additive 12 not absorbed by the strip of filter material 12 is collected. Thereby creating a feed level 28 in the tank 26.
In the lower region of fig. 1, an additive reservoir 38 is shown, which has a reservoir for additive 20 and is connected to two lines, namely an inflow line 30 and a return line 34, which dip into additive 20 of additive reservoir 38 in the form of a dip tube.
The inflow line 30 is provided with an inflow line measuring device 32 and means, not shown, for pumping the additive 20 from the additive reservoir 38 to the application nozzle 22. The return line 34 is provided with a return line measuring means 36. The inflow line measuring device 32 may also be a measuring device which determines, for example, the rotational speed of a pump, not shown. In this way, the inlet line volume flow at the additive 20 can also be determined.
The coating device 10 shown in fig. 1 thus already provides all the information necessary for the volume flow control device according to the invention.
A specific embodiment of the adjustment is schematically shown in detail in fig. 2 and 3.
Fig. 2 shows a coating device 100 according to the invention, which is constructed in many respects similar to the coating device 10 of fig. 1. The coating apparatus 100 of fig. 2 additionally comprises a movable plate 60 with which the coating surface can be reduced by: the sheet 60 is pushed into the spray cone 21 and thereby covers a portion of the spray cone of the additive 20 before it may reach the filter tow or the filter material strand 12.
In the lower region of fig. 2, a volume flow regulating device 50 is shown, which comprises a volume flow regulating mechanism 52, which receives a ready input signal at its inlet. The input signal is generated as follows. The inlet line measuring means 32 and the return line measuring means 36 each emit a volume flow corresponding to the measured inlet line volume flowOr return line volumetric flow/>Corresponding signals. These signals are supplied via data lines 51, 53, which may also be signal lines, to a differencing device 54, which forms a volume flow difference/>, from the two volume flowsThis difference signal is fed via a further data line 55 to a further differencer 56 which differends the volume flow difference signal/>From the volumetric flow rate rating signal/>And subtracted therefrom. The result of the adjustment is transmitted via a control line 58 to a control device, not shown, for the movable sheet 60, which is moved accordingly, so that the application surface of the additive 20 on the filter material strand 12 is enlarged or reduced.
The second adjusting circuit is shown in the form of a feed height adjusting device 70 in the right part of fig. 2. The signal relating to the filling level 28 in the collecting tank 26, which in this case acts as a filling level container 71, is differentiated in time and is transmitted via a data line 78 to a differencing device 74, which varies this signal, which is derived in time, from the setpoint filling level height, which is set to 0, to the nominal filling level heightIs subtracted from the signal of (c). The feed height adjustment mechanism 72 of the feed height adjustment device 70 uses this signal for opening or narrowing the proportional valve 80 in the return line 34 via the control line 76 when the feed liquid level 28 is not constant. Alternatively, the signal for the filling level 28 can also be compared in the differentiator 74 with a temporally delayed signal in order to generate a time-dependent derivative of the filling level in this way.
Fig. 3 shows another embodiment of a coating device 102 according to the invention, which differs from the coating device 100 in several points. In this embodiment, pumps, namely an inflow pump 33 and a return pump 37, are therefore provided in place of the volume flow measuring means in both the inflow line 30 and the return line 34, the pumping speeds of which serve as a measure for the volume flow of the additive 20 in the inflow line 30 and in the return line 34, respectively. Furthermore, a separate feed level container 71 is arranged in the return line 34 below the collecting tank 26, which allows a very precise determination of the feed level height and the feed level height change as a function of the narrowing. Also, unlike fig. 2, in fig. 3 the pumping speed of the return pump 37 is controlled directly for the purpose of a feed level height adjustment by means of the feed level height adjustment mechanism 72. The remaining details of the coating apparatus 102 correspond to the coating apparatus 100 described previously in fig. 2.
All the features mentioned, as well as the features which are known only from the drawing and also the individual features which are disclosed in combination with other features, are regarded as important for the invention both individually and in combination. Embodiments according to the present invention may be implemented by individual features or by a combination of features. Within the scope of the invention, features identified by "especially" or "preferred" should be understood as optional features.
List of reference numerals:
10 coating device
12 Filter material strips
14 Direction of conveyance
16. 18 Roller pairs
20 Liquid additives
21 Spray cone
22 The additive volume flow 26 collection tank with the coating nozzle 24 removed
28 Feed liquid level
30 Inflow pipeline
32 Inflow pipeline measuring mechanism
33 Inflow pump
34 Return line
36 Return line measuring mechanism
37 Reflux pump
38 Additive storage container
50 Volume flow regulator
52 Volume flow regulating mechanism
51. 53 Data line
54. 56 Differencing device
58 Control line
60 Movable plate
70 Charging height adjusting device
71 Feed liquid level container
72 Feed height adjusting mechanism
74 Differencing device
76 Control line
78 Data line
80 Proportional valve
100 Coating device 102 coating deviceInlet line volumetric flow/>Volume flow of return lineVolume flow difference/> Rated volume flow/>The nominal feed level height varies.
Claims (15)
1. Method for producing a filter rod of the tobacco processing industry, in which a filter material rod (12) of the tobacco processing industry is unwound, sprayed with a liquid additive (20) by means of at least one coating nozzle (22) in the unwound state and subsequently shaped into a filter rod, wherein the additive (20) is pumped from an additive storage container (38) to the at least one coating nozzle (22) by means of an inflow line (30), and the sprayed additive (20) which is not absorbed by the filter material rod (12) is returned to the additive storage container (38) by means of a return line (34),
Characterized in that the inlet line volume flow of the additive (20) in the inlet line (30) is determinedAnd the return line volume flow/>, of the additive (20) in the return line (34)And the volume flow rate of the additive (20) is varied/>Determined as inflow line volumetric flow/>And return line volume flow/>The difference between the two is used as a control variable for the additive-coated volume flow control device (50) and is based on a predetermined or predeterminable target volume flow/>The difference is adjusted, wherein the result of the adjustment is transmitted via a control line (58) to a control device for controlling the movable plate (60) in such a way that the plate (60) is moved in such a way that the application surface of the additive (20) on the filter material strand (12) is enlarged or reduced, wherein additionally a feed level height adjustment (70) is carried out in a feed level container (71) arranged in front of or in the return line (34), the adjustment being aimed at: vanishing the time-wise derivative of the time-wise curve of the feed level height in the feed level container (71), i.e./>Wherein for the inflow line volume flow/>And/or the return line volumetric flow/>And controlling.
2. The method according to claim 1, wherein for controlling the return line volume flow-Adjusting the pumping speed of a proportional valve (80) in the return line (34) or of a return pump (37) in the return line (34).
3. A method according to claim 1, characterized in that the amount of additive (20) added to the strip (12) of filter material is controlled by means of a plate (60) which can be pushed at least partially into a spray cone (21) produced by the at least one application nozzle (22).
4. The method according to claim 1, characterized in that the volume flow regulating device (50) is operated continuously at least in a time-dependent section of the dynamic machine behavior and/or at least in a time-dispersed section of the constant machine behavior.
5. The method of claim 1, wherein the difference between the machine speed and the volumetric flow rate is determined fromThe amount of additive (20) per filter or per filter length or length unit in the filter rod is calculated.
6. A method according to claim 5, characterized in that the predetermined filter rod length is additionally used in calculating the amount of additive (20) per filter or per filter length or length unit in the filter rod.
7. A method according to claim 1, characterized by discharging a filter which has been sprayed but has not been sufficiently sprayed at a time at which the volume flow rate is differentDeviating from the nominal volume flow/>, beyond a predetermined or predeterminable tolerance valueOr the calculated amount of additive (20) per filter or per filter length or length unit in the filter rod exceeds a predetermined or predeterminable tolerance value by a predetermined amount.
8. Coating device (10, 100, 102) for applying a liquid additive (20) to an expanded filter material strand (12) of the tobacco processing industry, comprising at least one coating nozzle (22), an additive storage container (38), an inflow line (30) and an inflow pump (33) as well as a return line (34), by means of which the additive (20) can be pumped from the additive storage container (38) via the inflow line (30) or to the at least one coating nozzle (22), by means of which the additive (20) which is not absorbed in the filter material strand (12) can be returned to the additive storage container (38), characterized in that it comprises an inflow line volume flow for the additive (20) in the inflow line (30)Inlet line measuring means (32) for measuring and return line volume flow/>, for an additive (20) in the return line (34)-A return line measuring means (36) for taking measurements and-a volume flow regulating means (52) configured for: difference in volume flow rate of the additive (20)/>Determined as inflow line volumetric flow/>And return line volume flow/>The difference between them and is used as a regulating variable for the volume flow regulating device (50) for the additive application and is based on a predetermined or predeterminable target volume flowThe result of the adjustment is transmitted via a control line (58) to a control device, which is used to control the movable sheet (60) in such a way that the sheet (60) is moved in order to enlarge or reduce the application surface of the additive (20) on the filter material strand (12), wherein a feed level container (71) arranged in front of or in the return line (34) and a feed height adjustment mechanism (72) are additionally provided, which is designed to: controlling the volume flow rate of the inflow pipeline And/or the return line volumetric flow/>The regulation targets are: vanishing the time-wise derivative of the time-wise curve of the feed level height in the feed level container (71), i.e./>
9. The coating device (10, 100, 102) according to claim 8, characterized in that a controllable proportional valve (80) and/or a controllable return pump (37) is arranged in the return line (34).
10. The coating apparatus (10, 100, 102) of claim 8, comprising a sheet (60) which can be pushed at least partially into a spray cone (21) produced by said at least one coating nozzle (22) in order to control the amount of additive (20) added to said strip of filter material (12).
11. The coating device (10, 100, 102) according to claim 8, characterized in that the inflow line measuring means (32) and/or the return line measuring means (36) are designed as volume flow measuring means or as rotational speed measuring means for the pumps (33, 37).
12. The coating apparatus (10, 100, 102) of claim 8, wherein said feed liquid level container (71) is configured as a collection tank (26).
13. The coating device (10, 100, 102) according to claim 8, characterized in that the coating device is constructed and arranged for carrying out the method according to any one of claims 1 to 7.
14. Machine of the tobacco processing industry, having a coating device (10, 100, 102) according to any one of claims 8 to 13.
15. A machine according to claim 14, comprising a discharge mechanism for discharging filter rods cut in segments from the filter rod, by means of which filter rods that have not been sufficiently sprayed can be discharged.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102015108968.8A DE102015108968A1 (en) | 2015-06-08 | 2015-06-08 | Method, applicator and machine for producing a filter strand of the tobacco processing industry |
| DE102015108968.8 | 2015-06-08 |
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| Publication Number | Publication Date |
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| CN106235401A CN106235401A (en) | 2016-12-21 |
| CN106235401B true CN106235401B (en) | 2024-06-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610400431.6A Active CN106235401B (en) | 2015-06-08 | 2016-06-08 | Machine, method and coating device for producing filter rods for the tobacco processing industry |
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| Country | Link |
|---|---|
| EP (1) | EP3103354B1 (en) |
| CN (1) | CN106235401B (en) |
| DE (1) | DE102015108968A1 (en) |
| PL (1) | PL3103354T3 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107802033A (en) * | 2017-12-05 | 2018-03-16 | 武汉黄鹤楼新材料科技开发有限公司 | A kind of filter stick surface coating device and painting method |
| DE102018133156A1 (en) * | 2018-12-20 | 2020-06-25 | Hauni Maschinenbau Gmbh | Manufacturing process of an inductively heatable tobacco product |
| CN111257508A (en) * | 2020-01-16 | 2020-06-09 | 浙江中烟工业有限责任公司 | Method for quantitatively detecting spraying amount of plasticizer in real time in online production process of filter stick |
| CN114304730B (en) * | 2021-12-31 | 2024-07-02 | 福建金闽再造烟叶发展有限公司 | Cigarette filter stick production facility and triacetin conveying system thereof |
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- 2016-06-02 EP EP16172691.4A patent/EP3103354B1/en active Active
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Also Published As
| Publication number | Publication date |
|---|---|
| PL3103354T3 (en) | 2019-03-29 |
| EP3103354B1 (en) | 2018-10-03 |
| EP3103354A1 (en) | 2016-12-14 |
| DE102015108968A1 (en) | 2016-12-08 |
| CN106235401A (en) | 2016-12-21 |
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