DE2947689A1 - TOBACCO CUTTER - Google Patents

Description

Stw .: Display KT cutting width - Hauni file 1594 Bergedorf, November 26, 1979

Tobacco cutter

The invention relates to a tobacco cutter with a cutting drum and a press conveyor for compacting and for feeding the tobacco taken from a storage container to the cutting drum.

Tobacco cutters usually consist of a storage container for the uncut tobacco, a press conveyor and a cutting drum, the circumference of which is occupied by cutting blades extending in 1n axial direction. The press conveyor consists of press chains, which feed the tobacco from the storage container to the cutting drum and thereby condense into a tobacco cake at the same time. The drive of the tobacco cutter is so balanced that the speed of rotation of the cutting drum and the feed speed of the press conveyor 1n are a fixed ratio to each other, through which the cutting width of the Tobacco specified 1st. The setting of the cutting width takes place here as a rule on the basis of empirical values by changing the speed of the press conveyor 1 in relation to the speed of the cutting drum. There is no monitoring of the cutting width possible, especially if the cutting widths have to be changed frequently is a disadvantage.

The present invention has the object of providing a Specify tobacco cutters who have permanent monitoring and rapid adjustment of the cutting width of the cut tobacco is possible, at the successive Processing of different types of tobacco and thus changing nominal cutting widths is the reliable monitoring the correct setting of the specific tobacco

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Stw .: show KT cutting width - Hauni file 1594 Bergedorf, November 26, 1979

To ensure cutting widths assigned to the varieties.

This task is solved with a tobacco cutter from the introduction specified type according to the invention by a device for recording and displaying the cutting width of the cut tobacco. The cutting width of the cut Tobacco can therefore be read and checked at any time on the display provided for this purpose. Based on these A very precise setting of the cutting width of the tobacco is possible.

The tobacco cutter according to the invention has measuring means for detecting the conveying speed v _{p of} the pre-conveyor, measuring means for detecting the rotational speed Vy of the cutting drum and an evaluation circuit. The evaluation circuit entha'lt an arrangement for forming one of the conveying speed v _p magnitude proportional G _p, an arrangement for forming a drum speed Vj magnitude proportional to Gy and an arrangement for forming the quotient G _T / G _p. The evaluation circuit is connected to an arrangement for displaying the quotient G _T / G _p , which represents a measure of the cutting width of the cut tobacco.

It is particularly advantageous to _{digitally record the conveying speed v p of} the press conveyor and the rotational speed vr of the cutting drum. For this purpose, the press conveyor is equipped with one or more _{initiators generating pulses at intervals of time v p} , and the cutting drum with one or more initiators generating pulses at intervals of rotation Vj. These initiators are connected to payment modules, which

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Stw .: Show KT cutting width - Hauni file 1594 Bergedorf, November 26, 1979

count the clocks emitted by a higher-frequency clock generator between two consecutive pulses from the initiators and transfer them to a connected memory element as a measure of the length of the time intervals between consecutive pulses from the initiators. Output digital-to-analog converters for forming the conveying speed v _{p of} proportional quantities G _p or the rotational speed ν ,, of the cutting drum of proportional quantities Gj are connected to the memory. The output of the digital-to-analog converter is connected to a D1 vidier-jiaustein as an arrangement for forming the quotient Gy / Gp. The digitally recorded measured quantities are thus converted to 1n analog quantities and, as such, are further processed to produce a display.

Suitable initiators 1n primarily come _# inductive, capacitive, or mechano-elektrisehe opto-elektMsehe questioning pulse, the arrangement for forming the quotient Gj / Gp 1st formed according to the invention as D1 v1dier-Bauste1n and e1ngangsse1tig connected to the outputs of the storage elements.

At a very high operating speed of the tobacco cutter the time intervals between two pulses generated by the initiators on the press conveyor are shorter, so that the counting clocks emanating from the clock generator at a predetermined first clock frequency f. no longer suitable s1nr, the duration of these intervals to be determined with sufficient accuracy. The voltage at the output of the following digital-to-analog converter, which depends on the number of counting cycles that have accumulated becomes too small. In this case it is provided that the evaluation circuit has a switch with which

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Stw .: Show KT cutting width - Hauni file 1594 Bergedorf, November 26, 1979

the clock generator depending on the conveyor speed Vp and / or the speed of rotation Vy can be switched in frequency 1st.

The preferred display device for the quotient Gy / Gp is a digital display is used. A D1g1tal-VoItmeter is primarily intended as such.

A possibility of automatic regulation of the cutting width of the tobacco cutter is provided by the invention in that the displayed measured value according to a further embodiment of the invention of a control arrangement to control the cutting width of the tobacco as an actual value can be abandoned.

Since uninterrupted monitoring of the cutting width of the tobacco does not appear to be necessary in every case, it is provided in an embodiment of the invention that the evaluation circuit is designed for the connection and selection of several tobacco cutters. The cutting width control for several tobacco cutters is thus carried out by means of a single device. In this case, the evaluation circuit has changeover switches for setting the number of knives on each cutting drum. These changeover switches are expediently connected to a multiplication amplifier connected downstream of _{the arrangement for forming the quotient Gy / G p.} The display appearing in the display also takes into account the number of knives arranged on the cutting drum of the tobacco cutter in question,

The particular advantage of what is proposed according to the invention Tobacco cutter is that for the first time a direct control the cutting width of the cut tobacco allows will. This means that the tobacco cutter is switched to processing different types of tobacco 1n more concise catfish simplified. The training of the evaluation

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Stw .: Display KT cutting width - Haun1 file ■ 1594 Bergedorf, November 26, 1979

circuit permitted in the manner proposed according to the invention In addition, the very rational use of this evaluation circuit for displaying the cutting widths of several tobacco cutters that can be connected to this evaluation circuit at the same time. This is what it is only required the appropriate initiators on the press conveyors and to attach the cutting drums of the tobacco cutters in question and to close them with the evaluation circuit associate. The cutting widths of the individual tobacco cutters can then be queried as required.

130031/0007

Stw .: Display KT cutting width - Hauni file 1594 Bergedorf, November 26, 1979

The invention will now be explained in more detail using an exemplary embodiment shown in the drawing. It demonstrate:

Figure 1 shows a cross section through a tobacco cutter

according to the invention 1n schematic representation,

Figure 2 is a block diagram of the detection and Display of the cutting width of the tobacco and Figure 3 is a block diagram of a preferred embodiment

Management form of the evaluation circuit.

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ORIGINAL INSPECTED

Stw .: Display KT cutting width - Hauni file 1594 Bergedorf, November 26, 1979

The tobacco cutter is generally designated by 1 in FIG. It stands on a base 2, which is the housing 3 of the tobacco cutter wearing. The storage container for the uncut tobacco is designed as a storage shaft 4, which the uncut tobacco is fed from above. The storage shaft 4 ends downstream in the intake area of a press conveyor 6, which is formed by a lower press chain 7 and an upper press chain 8. The press chains 7 and 8 converge to MynMetUck 9 and? ur cutting drum Π «the other Storage shaft 4 removed tobacco is during the promotion towards the mouthpiece or the cutting drum from the press chains compressed into a tobacco cake that is attached to the mouthpiece 9 of the tobacco cutter to the cutting drum 11 exits and from the circumference of the cutting drum in the axial direction arranged knives 12 is cut. The cut tobacco falls down and is used for further processing promoted. The knives are continuously reground with a grinding device 13.

A motor 14 is provided to drive the press conveyor 6, its torque via an adjustable gear (PIV) gears 16, chain drives 17 and 18 and a gear drive 19 on the drive axles of the press conveyor 6 is transmitted. The engine 14 is with that of the clarity drive of the cutting drum, not shown 11 coupled so that the rotational speed of the cutting drum and the conveying speed of the press conveyor 6 Always stand in a predetermined relationship to one another. This speed ratio of the rotational speed of the cutting drum and the conveying speed of the press conveyor determine the cutting width of the cut tobacco.

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Stw .: KT cutting width display - Hauni file 1594 ßergedorf, November 26, 1979

According to the invention it is now provided to equip the tobacco cutter with a device for detecting and displaying the cutting width of the cut tobacco. For this purpose, in the case shown, the drive wheel of the upper pre-chain 8 is equipped with an initiator 21 which sends 6 pulses to the evaluation circuit 22 in accordance with the conveying speed of the press conveyor 6. The distance between two successive impulses from the initiator is proportional to the conveying speed v "of the press conveyor 6. In order to detect the rotational speed v _{T of} the cutting drum 11, the latter is equipped with an initiator 23, which is also connected to the evaluation circuit 22. The evaluation circuit 22 processes the pulses generated by the initiators 21 and 23 into a cutting width display that appears on the display 24. This display 24 is arranged on an operating unit 26 which, in the case shown, is carried on a pivotable bracket 27 to facilitate operation. The operating unit 26 is equipped with switches 28 for setting the cutting width.

The functional catfish of the tobacco cutter shown in FIG. 1 1st as follows:

The uncut tobacco comes out of the storage shaft in the catchment area of the press conveyor 6, where he first conveyed by the lower press chain 7 to the mouthpiece will. Between the lower press chain 7 and the upper press chain 8, it is pressed together during further conveyance and fed to the mouthpiece 9. The conveyor speed of the PVeßförderers 6 is by means of the drive wheel the upper press chain 8 arranged initiator 21 detected and as a sequence of pulses of the evaluation circuit

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Stw .: show KT cutting width - Hauni file 1594 Bergedorf, November 26, 1979

fed. The tobacco cake emerging from the mouthpiece 9 is cut with the cutting drum 11, the speed of rotation the cutting drum is detected by means of the initiator 23. The speed of this rotation The corresponding sequence of pulses also reaches the evaluation circuit 22, which receives the pulses from the initiator 23 and the initiator 21 in a cutting width display implements, the 1 appears in the display 24. The display 24 always shows the current value of the cutting width of the cut Tobacco. If this cutting width deviates from the specified value, the control elements 28 the speed of the press conveyor 6 by adjusting of the adjustable gear 16 can be set so that the desired value of the cutting width is shown in the display 24 appears.

Figure 2 shows a basic circuit diagram of the proposed according to the invention Cutting width display. Hler is again with 1 the tobacco cutter, of which only those mentioned in the hler In this context, the components of interest are shown. The cutting drum 11 and the press conveyor, of which only the upper press chain 8 is shown hler driven by a common motor 14, the upper press chain 8 being preceded by a variable gear 16 1st,

The pulses generated by the initiator 23 1m pulse generator 23 ' 29 and the pulse generator 21 'generated by the initiator 21 1m Pulses 31 arrive via the assigned connections and the switch 32 Z 'to the logic circuit 33 of the evaluation circuit 22. This processes the pulse train 1n according to the invention proposed catfish in a display 24 of the cutting width of the cut tobacco.

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Stw .: show KT cutting width - Haun1 file 1594 ßergedorf, November 26, 1979

The basic circuit diagram of FIG. 2 shows an embodiment in which the evaluation circuit is designed for the connection of six tobacco cutters. For this purpose, the evaluation circuit 2.1 is equipped with a corresponding number of inputs 34 and 36, to which the initiators of six tobacco cutters can be connected in the illustrated case. The tobacco cutter desired in each case is coupled to the evaluation circuit 22 with the switch 32.

Because the cutting drums of the six connected tobacco cutters have a different number of knives can, a changeover switch 37 is provided with which the appropriate number of knives for each tobacco cutter can be adjusted. According to the number of connections, six contact groups 37 are provided, from those in Figure 2, however, only two, the top one and the lowest contact group, are shown. Because the cutting width of the tobacco except for the speed of rotation the knife drum 11 also depends on the number of knives 12 present on its circumference, is activated by the switch 37 the necessary consideration of the number of knives guaranteed when determining the cutting width.

In Figure 3, which is a block diagram of the evaluation circuit contains, only the upper Preökette and the cutting drum 11 of the tobacco cutter 1 are shown. The evaluation circuit has two branches, one of which for processing the pulses 29 emanating from the cutting drum 11 and the other for processing those from the upper press chain 8 outgoing pulses 31 is provided. The first branch provided for processing the pulses 29

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Stw .; Display KT cutting width - Hauni file 1594 Bergedorf, November 26, 1979

contains a counter 38, the output of which is connected to a dividing module 42 via a memory 39 and a digital-to-analog converter 41. The second branch of the evaluation circuit provided for processing the pulses 3.1 also contains a counter 43 which is connected to the dividing module 42 via a memory 44 and a digital-to-analog converter 46. The counters 38 and 43 are also connected to a frequency plate 48 1n acted upon by the clock generator 47 and designed to output counter clocks of the lower frequency f ₁ and the higher frequency f ₂ . The display 24 is connected to the output of the dividing module 42 via an amplifier 49.

The output of the digital-to-analog converter 46 is with a Comparator 52 connected, the output of which is connected to a switching device 53. This switching device 53 actuates a frequency switch via a connection 54 The connections 57 are for the connection of a not shown automatic control of the cutting width of the tobacco cutting provided.

The function of the circuit shown in FIG. 3 is as follows:

The rotation of the cutting drum 11 generates pulses generated, whose temporal distance t, - the speed of the Cutting drum 11 corresponds. These pulses reach the input of the counter 38 and the memory 39. Every 1m Counter 38 incoming pulse 29 sets this counter on Zero and start him. The counter 38 now begins with the a known constant frequency f. from the frequency plate to count the delivered clock pulses until the next pulse

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Stw .: Show KT-Schn1ttbreite- Hauni file 1594 Bergedorf, November 26th 1979

stops the counting process. The frequency f ^ of the clock pulses is greater than that of the measuring pulses 29, so that a large number of clock pulses in the counter 38 is counted in the time interval between two pulses 29. This number of clock pulses from the frequency divider 48 in the counter 38 is therefore a measure of the actual distance t _{T between} two consecutive pulses 29. The following pulse 29 clears the memory 39 and at the same time acts as a transfer signal, which signals the transfer of the count 38 to the memory 39 causes. At the same time, the counter 38 is reset to zero so that a new count can begin. The content of the memory 39 is now converted in a digital-analog converter 41 into an analog variable G-r, which is proportional to _{the rotational speed v T of the cutting drum.} This variable G _T reaches the dividing module 42.

The impulses 31 arriving from the upper press chain 8 are processed in the same way. In the time interval tp between two impulses 31, the counter 43 clock pulses from the frequency plate 48 are counted in at the known constant frequency f ₁ . When the next pulse 31 arrives, the counter reading 1n is transferred to memory 44, the content of which was previously deleted by the corresponding pulse 31. At the same time, the counter 43 is reset to zero and restarted. The memory content reaches the D1g1ta 1-analog converter 46, where it is converted into a variable G _{p proportional to the conveying speed v p} . This value also reaches the dividing module 42.

_{The quotient G T} / G _{p is} formed in the dividing module 42, and via the multiplier amplifier 49 to the display

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mn

Stw .: Show KT cutting width - Hauni file 1594 Bergedorf, November 26, 1979

directed. In the amplifier 49 the divider construction. 3 Ly 1 Il i'i e'llltl ^ HöHilfe Uir't HiU is multiplied by a constant factor, the size of which depends on the number of cutting knives arranged on the knife drum, the number of knives can be set on the switch 37. The display 24 then directly shows the cutting width of the tobacco cutter.

When the conveying speed of the upper press chain 8 is scanned, a speed range of about 1:50 must be covered. At higher speeds, ie at a higher conveying speed, the time interval t _p between two pulses 31 becomes so small that an accurate measurement is no longer possible with the frequency f from the frequency plate 46, since the frequency f is too small. In order to counteract this deficiency, the variable G _p 1n generated by 1m D1g1ta 1-analog converter 46 and _{proportional to the conveyor speed v p} is compared in a comparator 52 with a threshold value. If the variable G _{p falls below} a predetermined value, a signal is generated which actuates the switching device 53. As a result, the frequency switch 56 is switched from the frequency f ₁ to a higher frequency f * of the frequency plate 48, so that again an exact payment of the time interval tp is made possible. The evaluation circuit can therefore also be automatically adapted to large changes in the velocity of the press conveyor.

A signal for the automatic Control of the cutting width of the tobacco cutter can be tapped.

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Claims (13)

HAUNi-WERKE KORBER a co.kg, ^ ⁶ November 1979 Patent Hr / Sch Stw .: display KT cutting width - Hauni file 1594 patent claims \ λ Tobacco cutter with a cutting drum and a press conveyor for compacting and feeding the tobacco taken from a storage container to the cutting drum, characterized by a device for detecting and displaying the cutting width of the cut tobacco. 2. Tobacco cutter according to claim 1, characterized in that measuring means for detecting the conveying speed Vp of the press conveyor (6), measuring means for detecting the rotational speed v _{T of} the cutting drum (11) and an evaluation circuit (22) are provided and that the evaluation circuit {22) has an arrangement proportional to form a conveying speed Vp size G _p, an arrangement for forming a drum speed Vj magnitude proportional G _T and an arrangement for forming the quotient Gj / G _p, and comprising an arrangement for the display of the ratio G _T / G _p as a measure stands for the cutting width of the cut tobacco 1n connection. 3. Tobacco cutter according to claim 1 or 2, characterized in that the press conveyor (ti) with one or more _{initiators (21) generating pulses in the conveying speed v p} corresponding tent intervals for digital detection of the conveying speed v _p and the cutting drum with one or more , Initiators (23) generating pulses for digital detection of the rotational speed Vy are fitted in the rotational speed vr corresponding time intervals. 130031/0007 ORIGINAL INSPECTED Stw .: Display KT cutting width - Hauni file 1594 Bergedorf, November 26, 1979 4. Tobacco cutter according to claim 3, characterized in that the initiators (21, 2Γ, 23, 23 ') are connected to counter modules (38, 43), which between two pulses (29 or 31) of the initiators (23, 23 'or 21, 2Γ) from a higher-frequency clock generator (47, 48) count and give as a measure for the lung of the tent intervals lying between successive pulses of the initiators on a downstream memory element (39 or 44) that output to the memory elements tig digital-to-analog converter (41 or 46) for the formation of the conveyor speed Vp of proportional sizes G _p or the rotational speed Vj of the cutting drum (11) of proportional sizes G ^ are connected and that the digital-to-analog converter with a Div1dier-Bauste1n (42) are connected as an arrangement for the formation of the quotient Gy / Gp. 5. Tobacco cutter according to claim 3 or 4, characterized in that inductive, capacitive initiators _; Mechano-electrical or opto-electrical pulse generators are provided. 6. Tobacco cutter according to one of claims 1 to 5, characterized in that the arrangement for forming the quotient Gj / G _{p is designed} as a dividing module (42) and connected to the storage elements (41, 46) on the input side. 7. Tobacco cutter according to one of claims 1 to 6, characterized characterized in that the evaluation circuit (22) has a switch (37, 51) for setting the number of Has knife (12) on the cutting drum (11) and that this with one of the arrangement for forming the quotient Gj / Gp downstream MuItIpH cation amplifier (49) connected is, - 3 130031/0007 "* J ^- Stw .: Show KT cutting width - Hauni file 1594 Bergedorf, November 26 , 1979 8. Tobacco cutter according to one of claims 1 to 7, characterized in that the clock generator (47, 48) is designed to be frequency-switchable depending on the conveyor speed v _p. 9. Tobacco cutter according to one of claims 1 to 8, characterized in that the clock generator (47, 48) 1n is designed to be _{frequency-switchable as a function of the rotational speed v T of} the cutting drum (11). 10. Tobacco cutter according to one of claims 1 to 9, characterized characterized in that the evaluation circuit (22) for the Connection and selection of several tobacco cutters is designed. 11. Tobacco cutter according to one of claims 1 to 10, characterized in that a digital display (24) is used as a display device for the quotient Gy / Gp, 12. Tobacco cutter according to claim 11, characterized in that that as a display device for the quotient G-r / Gn Digital VoItmeter used 1st, 13. Tobacco cutter according to one of claims 1 to 12, characterized characterized in that the displayed measured value of a control arrangement for controlling the cutting width of the tobacco is given as the actual value. 130031/0007