EP2067414B1 - Rod forming device in a machine for the tobacco processing industry - Google Patents

Abstract

The device (26) has a temperature sensor (73) provided at an inlet chamber (61) such that temperature of the device is measured as a value. A control unit (74) compares the value with a preset target value. A proportional valve (72) in a supply line (71) of cooling medium for the device is regulated based on the comparison such that total volume flow of the cooling medium in the supply line is regulated. An upper format (50) is subdivided into multiple chambers (51-53) such that the cooling medium passes through each chamber. An independent claim is also included for a method for manufacturing a rod for tobacco processing industry by using a rod forming device.

Description

The invention relates to a strand forming device of a machine of the tobacco processing industry, in particular extrusion machine, wherein the strand forming device is flowed through by a cooling medium or can be flowed through.

Out DE-A-36 24 098 such as EP-B-1 293 136 Forming sets are known for a stranding machine of the tobacco processing industry. These trim sets, also referred to as strand forming devices in the present invention, are used to make a continuous wrapped and substantially circular strand, in particular tobacco rod, with a trim set generally comprising side guide surfaces interconnected by a curved strand guide surface , and wherein the strand guiding surfaces in a section perpendicular to the strand conveying direction to form a contour.

In the context of the invention, a wrapped strand of the tobacco-processing industry is understood in particular to mean an endless filter strand or a tobacco strand formed from tobacco or from smokable tobacco substitutes, which is or will be provided with a wrapping strip of paper, foil or the like.

The format or the style set has a format lower part and a format upper part in a cigarette extruder machine type "PROTOS" of the patent applicant, wherein the format lower part is provided with a guide surface for the format strip and cigarette paper strips. The guide surface comprises two side guide surfaces, which are interconnected by a curved strand guide surface. For the purposes of this invention, the term "garniture" also means, in particular, the format as well as the strand shaping device.

In addition, in EP-A-1 342 421 according to the preamble of claim 1 discloses a machine of the tobacco processing industry for the production of rod-shaped articles in the strand process, the machine having a coolable garniture.

Also revealed EP-A-1 532 876 a format device of a cigarette rod maker, wherein one or more cooling elements are provided for cooling a guide wall for guiding a strand of the tobacco processing industry. Here, the cooling elements are designed for indirect cooling with the guide wall.

Based on this prior art, the task of The present invention is to ensure the cooling of a strand forming device of a machine of the tobacco processing industry in the simplest and most effective manner.

This object is achieved by a strand forming device of a machine of the tobacco-processing industry, in particular a stranding machine, according to claim 1.

The invention is based on the idea that a cooling medium to the strand forming device via only a single supply line, i. Entire cooling flow line, the strand forming device is supplied, wherein in the total cooling flow line, a corresponding, single (control) valve is provided to control the total volume flow of the cooling medium in the common cooling flow line.

In addition, a simple control results from the fact that exclusively at one point of the strand forming device with only one temperature sensor, the actual temperature is measured in the strand forming device. A corresponding temperature sensor or temperature sensor in this case measures the temperature in a limited area of the strand shaping device, wherein the corresponding measuring signal or the actual value is then further processed in a corresponding comparison device, eg the machine control. In this case, the actual temperature value is compared with a predetermined temperature setpoint, in order subsequently a corresponding valve, in particular a proportional valve, in the overall cooling flow line, via the the cooling medium is fed to the strand forming device to regulate. Here, the total volume flow of the cooling medium is controlled by means of only one (proportional) valve, the total volume flow in the total cooling flow line is then divided for individual Kohlbereiche the strand forming device in predetermined proportions or in predetermined volume flow ratios of areas or units of the pattern set. In this case, the volume flow conditions of the cooling medium in the individual coal areas of the strand forming device or the pattern set fixed, ie unchanged after a corresponding determination, given, during operation of a stranding machine, the ratios of the flow rates in the individual cooling areas of the strand forming device can not be changed manually or otherwise.

Another central idea of the invention is based on the fact that the temperature is measured exclusively at one point with a temperature sensor or sensor. Overall, the teachings of the present invention provide a constant temperature during operation, i. during the manufacture of a strand of the tobacco processing industry, e.g. Tobacco rod, set in the strand forming device or (on) regulated, whereby a simplified cooling of the tobacco rod to be produced or manufactured is set during its promotion by the strand forming device.

In particular, the strand shaping device has an upper format and a lower format.

In addition, the upper format is characterized in that the upper format is divided into a plurality of chambers, wherein a plurality, in particular each, chambers of the upper format of the cooling medium be flowed through or are, the supply lines of the chambers of the upper format are connected in parallel to the total cooling power line.

Accordingly, the sub-format is further developed in that the sub-format is divided into several chambers, wherein several, in particular each, chambers of the sub-format are flowed through by the cooling medium or, wherein the supply lines of the chambers of the sub-format are connected in parallel to the Gesamtkühlstromteitung.

It is particularly advantageous if in each case return lines for the cooling medium are connected to a plurality of chambers of the upper format and / or to a plurality of chambers of the lower format. Here, the return lines are formed after emerging from the cooled areas or units of the upper format and the lower format in a common return line, wherein the exiting return lines from the upper format and the lower format are connected in parallel.

In addition, it is provided according to an advantageous development that the return lines of the chambers of the upper format and / or the return lines of the chambers of the lower format in a common return line, in particular in a Gesamtkühlstromrücklaufleitung open.

According to the invention, the valve in the overall cooling flow line, via which the cooling medium is fed to the strand forming device, is designed as a proportional valve. This is done in a simple manner by means of (only) a proportional valve, the flow of the cooling medium in the Gesamtkühlstromzuleitung for the strand forming unit or device regulated.

In particular, it is furthermore advantageous if the temperature sensor is arranged on the input side of the lower format, relative to the conveying direction of a strand, in particular tobacco rod, to be formed in the strand shaping device. As a result, the appropriate temperature is measured at a position important for the production of the tobacco rod, in order subsequently to regulate or adjust the inflow of the cooling medium to the strand forming device.

In addition, an embodiment of the strand forming device is characterized in that the return lines of the chambers of the upper format and / or the return lines of the chambers of the sub-format locally, preferably at one point of the return lines, respectively narrowed, whereby the residence time of the cooling medium in the individual areas or Sections of the strand forming device is increased. Overall, this achieves a more effective and better cooling of the regions of the strand shaping device or of the upper format and of the lower format.

Moreover, the object is achieved by the use of a strand shaping device according to the invention described above of the tobacco-processing industry in a machine of the tobacco-processing industry, in particular a stranding machine.

A further solution of the object is achieved by a method for producing a strand of the tobacco processing industry, in particular in a rod making machine of the tobacco processing industry, using a strand forming device described above. To avoid repetition Reference is expressly made to the foregoing.

Fig. 1

eine Zigarettenstrangmaschine vom, Typ "PROTOS" der Patentanmelderin und

Fig. 2

schematisch ein Ausführungsbeispiel einer erfindungs- gemäß zu kühlenden Strangformungseinrichtung bzw. Formatgarnitur.

The invention will now be described by way of example with reference to an exemplary embodiment with reference to the drawings, reference being expressly made to the drawings with respect to all details of the invention which are not explained in greater detail in the text. Show it:

Fig. 1

a cigarette rod maker of the type "PROTOS" of the patent applicant and

Fig. 2

schematically an embodiment of a erfindungs accordance to be cooled strand forming device or format garnish.

In the following figures, identical or similar elements or corresponding parts are provided with the same reference numerals, so that a corresponding renewed idea is dispensed with.

At the in Fig. 1 schematically shown cigarette rod PROTOS the patent applicant is fed from a lock 1 a pre-distributor 2 in portions with tobacco. A removal roller 3 of the pre-distributor 2 added controlled a reservoir 4 with tobacco, from which a steep conveyor 5 takes tobacco and fed a stowage 6 controlled.

From the storage shaft 6 takes a pin roller 7 a uniform stream of tobacco, which is knocked out by a rollover roller 8 of the pins of the pin roller 7 and thrown on a circulating at a constant speed spreading cloth 9. A formed on the spreading cloth 9 tobacco fleece is in a viewing device 11, which consists essentially of an air curtain, the larger or heavier tobacco particles pass, while all other tobacco particles are directed by the air in a formed by a pin roller 12 and a wall 13 funnel 14.

From the pin roller 12, the tobacco is thrown into a tobacco channel 16 against a rope conveyor 17, where the tobacco held by means sucked into a vacuum chamber 18 air and a tobacco rod is aufauert.

An equalizer 19 removes excess tobacco from the tobacco rod, which is then placed on a run in synchronized cigarette paper strip 21. The cigarette paper strip 21 is withdrawn from a reel 22, passed through a printing unit 23 and placed on a driven format tape 24. The format strip 24 transports the tobacco rod and the cigarette paper strip 21 through a format 26 in which the cigarette paper strip 21 is folded around the longitudinally axially conveyed tobacco rod, so that an edge still sticks, which is glued in a known manner by a Glimapparat, not shown. Then the bond is closed and dried by a Tandemnahtplätte 27.

A coated tobacco rod 28 formed as a material strand passes through a strand density meter 29 which controls the leveling device 19 and is cut by a knife apparatus 31 into double-length cigarettes 32. The double-length cigarettes 32 are transferred from a transfer device 34, which has controlled arms 33, to a transfer drum 36 of a filter attachment machine 37, onto the cutting drum 38 of which they are divided into single cigarettes with a circular blade.

Conveyor belts 39, 41 promote excess tobacco into one below from the reservoir 4 arranged container 42, from which the recycled tobacco from the vertical conveyor 5 is removed again.

Fig. 2 12 schematically shows an embodiment of the format 26, which is also referred to as a strand forming device, wherein the format 26 is formed from an upper format 50 and a lower format 60. A tobacco rod to be wrapped is placed between the upper format 50 and the lower format 60 from left to right in accordance with the method of FIG Fig. 2 conveyed schematically drawn transport direction F to be wrapped longitudinal axially promoted tobacco rod. The upper format 50 consists of an (inlet) finger 51, a cover strip 52 and an adhesive chamber 53. The lower format 60 is formed from the independent units inlet chamber 61, a first sub-format 62, a second sub-format 63 and an outlet chamber 64.

A cooling medium is conveyed to the (sub) units of the upper format 50 and the lower format 60 via a (single) common feed line 71. By means of the conveyed cooling medium, which is conveyed for example from a machine cooling to the upper format 50 and the lower format 60, a constant, predetermined temperature profile is set over the entire conveying region of the upper format 50 and the lower format 60. In this case, the entire volume flow of the cooling medium to the upper format 50 and the lower format 60 is conveyed via the feed line 71.

In the supply line 71, a proportional valve 72 is arranged, by means of which the entire volume flow of the cooling medium for the format 26 is regulated. In order to adjust the proportional valve 72 accordingly, a control loop is formed, which consists of a temperature sensor 73 and a control unit 74.

The temperature sensor 73 is arranged as the only temperature sensor of the format 26 on the inlet chamber 61, so that by means of the (single) temperature sensor 73, the temperature in the region of the inlet chamber 61 is detected. Here, the measured temperature at the inlet chamber 61 is transmitted as an actual value to the control unit 74, so that compared in the control unit 74, a comparison between the measured actual value of the temperature at the inlet chamber 61 with a predetermined, predetermined or predeterminable setpoint of the temperature at the inlet chamber becomes. Based on the actual value comparison of the temperature, the proportional valve 72 is brought by the control unit in a corresponding passage position or blocking position. In particular, the control unit 74 is part of the central machine control.

If the proportional valve 72 is in passage position, the cooling medium in the common supply line 71 is conveyed further to the (sub) units of the upper format 50 and the lower format 60. In this case, the feed line 71 is connected to the individual feed lines 75 of the units of the upper format 50 and the lower format 60 via the individual feed lines 75 for the finger 51, the cover strip 52 and the adhesive chamber 53.

The feed lines 75 for the units of the upper format 50 and the feed lines 75 for the units of the lower format are connected in parallel. Here, the cooling medium, which is transported via the common feed line 71 to the upper format 50 and the lower format 60, divided into several feed lines 75, so that the units of the upper format 50 (finger 51, cover strip 52, adhesive chamber 53) and the lower format 60 (inlet chamber 61, first sub-format 62, second sub-format 63, Outlet chamber 64) are each traversed separately from each other by the cooling medium in order to achieve an individual cooling of the corresponding structural unit.

After passage of the cooling medium through the units of the upper format 50 and the lower format 60, the cooling medium is conveyed via corresponding drain lines 76 from the units of the upper format 50 and the lower format 60 to a common return line 77.

In particular, the return lines 76 are dimensioned such that the flow rate (ie the flow volume per unit time) of the exiting cooling medium is smaller than the flow volume or the flow rate of the cooling medium entering via the supply lines into the units of the upper format 50 and the lower format 60 predetermined, fixed set residence time of the cooling medium in the upper format 50 and in the lower format 60 achieved or formed.

According to the invention, the temperature at one point, in the present exemplary embodiment, at the inlet chamber 61 is measured above the temperature sensor 73, the measuring signal being processed in the control unit 74. In accordance with the desired temperature in the format 26, the total volume flow of the cooling medium is regulated by means of only one proportional valve in the common supply line 71. Subsequently, the distribution of the total volume flow of the cooling medium for the individual cooling regions of the upper format 50 and the lower format 60, wherein the distribution, ie the ratio of the volume flows in the units of the upper format 50 and the units of the lower format 60 in a predetermined fixed, ie unchangeable ratio to each other, to be divided. Here are the conditions the individual. Volume flows in the upper format 50 and in the sub-format 60 predetermined so that a predetermined or desired temperature profile is formed over the entire format 26.

LIST OF REFERENCE NUMBERS

1

lock

2

preliminary distributor

3

out roller

4

reservoir

5

vertical conveyor

6

accumulating shaft

7

pin roll

8th

picker roller

9

stray cloth

11

OverviewAmenitiesPicture

13

tape

14

funnel

16

tobacco channel

17

line conveyor

18

Vacuum chamber

19

Egalizer 21 cigarette paper strips

22

reel

23

printing unit

24

format tape

26

format

27

Tandemnahtplätte

28

wrapped tobacco rod

29

Strand density meter

31

knife apparatus

32

double-length cigarettes

33

poor

34

Transfer device

36

transfer drum

37

filter attachment

38

cutting drum

39

conveyor belt

41

conveyor belt

42

container

50

upper format

51

finger

52

cover strip

53

Klebkammer

60

under format

61

inlet chamber

62

first subformat

63

second subformat

64

outlet chamber

71

feed

72

Proportional valve

73

temperature sensor

74

control unit

75

Single supply line

76

Single outlet line

77

Return line

F

conveying direction

Claims (10)

1. Strand-forming device (26) of a machine in the tobacco-processing industry, in particular strand machine, wherein a cooling medium flows through or can flow through the strand-forming device and wherein the total volume flow of the cooling medium is fed through a total coolant flow line (71) of the strand-forming device (26), characterised in that a temperature sensor (73), with which the temperature of the strand-forming device (26) is measured as the actual value, is provided at a point (61) of the strand-forming device (26), that a reference device (74) is provided so that the actual value is compared with a predetermined target value by means of the reference device (74), and wherein a single proportional valve (72) in the total coolant flow line (71) of the cooling medium to the strand-forming device (26) is controlled by means of the actualtarget comparison, so that control of the total volume flow of the cooling medium is carried out in the total coolant flow line (71).
2. Strand-forming device (26) according to claim 1, characterised in that the strand-forming device (26) has an upper format (50) and a lower format (60).
3. Strand-forming device (26) according to claim 2, characterised in that the upper format (50) is sub-divided into several chambers (51, 52, 53), wherein cooling medium flows through several, in particular each, chambers (51, 52, 53) of the upper format (50), wherein the feed lines (75) of the chambers (51, 52, 53) of the upper format (60) are connected in parallel to the total coolant flow line (71).
4. Strand-forming device (26) according to claim 2 or 3, characterised in that the lower format (60) is sub-divided into several chambers (61, 62, 63, 64), wherein cooling medium flows through several, in particular each, chambers (61, 62, 63, 64) of the lower format (60), wherein the feed lines (75) of the chambers (61, 62, 63, 64) of the lower format (60) are connected in parallel to the total coolant flow line (71).
5. Strand-forming device (26) according to claim 3 or 4, characterised in that in each case return lines (76) for the cooling medium are connected to several chambers (51, 52, 53) of the upper format (50) and/or to several chambers (61 to 64) of the lower format (60).
6. Strand-forming device (26) according to claim 5, characterised in that the return lines (76) of the chambers (51, 52, 53) of the upper format (50) and/or the return lines (76) of the chambers (61 to 64) of the lower format (60) pass in a common return line (77), in particular in a total coolant flow return line (77).
7. Strand-forming device (26) according to one of claims 2 to 6, characterised in that the temperature sensor (73) is arranged on the input side of the lower format (60), based on the conveying direction (F) of a strand, in particular tobacco strand, to be formed in the strand-forming device.
8. Strand-forming device (26) according to one of claims 1 to 7, characterised in that the return lines (76) of the chambers (51, 52, 53) of the upper format (50) and/or the return lines (76) of the chambers (61 to 64) of the lower format (60) are narrowed locally, preferably at a point on the return line (76).
9. Use of a strand-forming device (26) according to one of claims 1 to 8 in a machine in the tobacco-processing industry, in particular strand machine.
10. Method for the preparation of a strand in the tobacco-processing industry using a strand-forming device (26) according to one of claims 1 to 8.

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