EP1149196B1 - Mixing fibrous constituents - Google Patents

Mixing fibrous constituents Download PDF

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Publication number
EP1149196B1
EP1149196B1 EP19990966838 EP99966838A EP1149196B1 EP 1149196 B1 EP1149196 B1 EP 1149196B1 EP 19990966838 EP19990966838 EP 19990966838 EP 99966838 A EP99966838 A EP 99966838A EP 1149196 B1 EP1149196 B1 EP 1149196B1
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EP
European Patent Office
Prior art keywords
weighing
characterized
material
conveying speed
weight
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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EP19990966838
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German (de)
French (fr)
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EP1149196B2 (en
EP1149196A1 (en
Inventor
Peter Engelhardt
Franz Höck
Erich Scholz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Temafa Maschinenfabrik GmbH
Original Assignee
Temafa Maschinenfabrik GmbH
TEMAFA TEXTILMASCHINENFABRIK MEISSNER MORGNER AND CO GmbH
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Priority to DE19856447 priority Critical
Priority to DE1998156447 priority patent/DE19856447A1/en
Application filed by Temafa Maschinenfabrik GmbH, TEMAFA TEXTILMASCHINENFABRIK MEISSNER MORGNER AND CO GmbH filed Critical Temafa Maschinenfabrik GmbH
Priority to PCT/DE1999/003909 priority patent/WO2000034557A1/en
Publication of EP1149196A1 publication Critical patent/EP1149196A1/en
Publication of EP1149196B1 publication Critical patent/EP1149196B1/en
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=7890286&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP1149196(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
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    • DTEXTILES; PAPER
    • D01NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01GPRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
    • D01G13/00Mixing, e.g. blending, fibres; Mixing non-fibrous materials with fibres
    • DTEXTILES; PAPER
    • D01NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01GPRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
    • D01G23/00Feeding fibres to machines; Conveying fibres between machines
    • D01G23/02Hoppers; Delivery shoots
    • D01G23/04Hoppers; Delivery shoots with means for controlling the feed

Abstract

The invention relates to a method and a device for mixing fibrous constituents using weight feeding according to which the fibrous material to be dosed is removed, each time, from fibrous balls and is delivered into a weighing container via a device provided for supplying material. A prefilling chamber is connected upstream from said weighing container. The weighing container is separated from the prefilling container by a controllable flap and, after weighing, the material is discharged from the weighing container and released onto a mixing strip. A desired specified weight curve is given to the weighing device for each fibrous component (I, II, III). In order to fill the weighing container (10), the device for supplying the material is controlled according to said specified weight curve by a corresponding variation of the delivery rate. The course of the weighing cycle is fixed by the corresponding percentile delivery rate over the percentile time of the weighing cycle (unit curve). The capacity of the prefilling chamber (8) corresponds to the capacity of the weighing container (10).

Description

The invention relates to a method and a device for Mixing fiber components by means of weighing box feed, the equipped with a weighing container and a Vorfüllraum is, wherein the weighing container from the upstream Vorfüllraum separated by a controllable flap, and after weigh the material from the weighing container on a Mixed tape is dropped.

For mixing fiber components are used for dosing the individual fiber components Weigh Box Feeding Devices used in which fiber bales have a feed table and a subsequent conveyor belt a rising needle band be fed, from which the needle tape fiber material in Patties out and up against a stripper roller promotes. A subsequent knock-down roller performs this This way lightened material to a weighing container.

The weighing of the fibers according to this known discontinuous Procedure is usually done so that the weighing container with two different material feed speeds is fed, the feed rate of the needle belt speed is determined. First, a rough dosage with high needle belt speed to the weigh bin to fill in as short a time as possible. However, with this high needle belt speed only inexact the desired To reach cradle weight. That's why this fast filling is only carried out to a certain degree of filling. As soon as this first limit of coarse filling is reached, the Needle belt switched to low speed, and it follows with this low speed the fine dosage, until the desired final weight is reached. When reaching this second limit, the needle band is stopped. Then the exact weight is determined by the balance. For accurate weight determination, it is necessary that the Balance is at a standstill, i. that they are not through the Filling caused vibrations more. This process may take up to 2 or 3 seconds. After that, the Weighing container emptied onto a so-called mixed belt and tared, i. the weighing device is exactly at zero point set. This is the weighing device for the next weighing prepared, and the needle band is again turned on, first at high speed the Coarse filling for the next weighing process.

Despite accurate setting of the weighing device and immediate Shutting down the needle band fall after reaching the second limit still fibers in the weighing container, so that the desired weighing value exceeded, sometimes even below becomes. This is especially the case if that Fiber material is only slightly open. To compensate for this Inaccuracy, this weight value is determined and at the weighted further weighings. In addition are provided above the weighing container flaps, which immediately at Close the final weight to refill To avoid fiber material in the weighing container.

To accelerate the weighing cycle is a fast filling of the weighing container desirable, however, leads to a high Although needle belt speed at a high throughput, however is due to the poorer opening of the fiber material the Weighing inaccuracy, as it involves the entrainment of material and like that comes. A low needle belt speed Although causes a better opening and thus a high Weighing accuracy, however, is the throughput and thus the Filling speed of the weighing container low. It is because of that the goal of filling as high as possible throughput and still a good opening and high accuracy at to reach the weighing.

Further, when weighing fibers, the material specific ones play Properties play a big role. It must therefore all Speeds and limits on these material-specific properties be set. The loading of the filling space Before the needle band has also an influence on the parameters to be set.

Fiber blenders are usually equipped with multiple weighing bins and operated with different raw materials. The slowest Weighing determines the throughput of the entire production plant. In the described weighing process the Achieving the desired accuracy and throughput is what it's all about necessary that the facility of operators with good Process knowledge and experience is discontinued. The Setting values must be determined empirically for each fiber type be, which is expensive.

There are already electronically controlled weighing devices known that the operation and monitoring of such Considerably simplify mixing plants, nevertheless it is necessary the corresponding data and empirical values for each to enter mixing component in the control device and to be stored and pending for processing Materials and desired blends for the control program retrieve. This is time consuming and requires experienced Personnel. In addition, there is always the risk of incorrect settings. For new compounds and materials, the Experience values first tried and determined.

From DE 34 12 920 a device for dosing Contents known for filling packages. Filling the Weighing container takes place via two stages with a coarse dosage and a fine dosage. For the rough dosage is the Filled product is directed via a first supply line into an antechamber, provided with a shut-off device to the weighing container is, wherein a volumetric dimension of the contents in the Antechamber is provided. Upon reaching the given Volume is completed filling the antechamber and its Content emptied into the weighing container. After closing the Absperroganges between pre-chamber and weighing container takes place the fine dosage over a second conveyor line. While This time can already be the antechamber on the first conveyor line be refilled so that a shortening of Filling speed for the weighing container occurs. adversely in this known device is that two separate Filling lines are necessary for the fine filling and for the Prefilling, so that for each filling a corresponding Flap control and a corresponding feeder is required. The device is therefore relatively expensive.

It is also a method of continuously detecting the Bulk density of granular, fibrous or sheet-like material, in particular of tobacco, known in which the good in one steady stream by means of a first conveyor to a second funding and from this in a mass constant Good stream supplied subsequent processing work is (DE 28 41 494). The conveying speed of the first funding is dependent on the mass of the Controlled the second subsidy delivered good. The problem, in a discontinuous weighing for mixing Fiber components nevertheless a continuous Materiaiförderung and to achieve the opening of the same lies with this known device not available. The known method and the device provided for its implementation is also not suitable, different fiber components according to predetermined Compound by weight for further processing.

Finally, by US-PS 4,766,966 an electronic Control program known to load a weigh bin over a To fill the prefilling space in the shortest possible time, but under Avoidance of weight excesses due to fast filling. The supply of the material to be weighed in the Weighing container is therefore due to a different opening width the exhaust valves controlled from the Vorfüllbehälter. About the mixing of fiber components and the supply of material in the Vorfüllraum the known device is nothing refer to. By controlling the discharge flap opening There is a risk with fiber material that this is not the completely open flaps gets stuck and thus it too Irregularities and incomplete filling of the weighing container comes.

The object of the present invention is to remedy the defects identified and to provide a method and a weighing device in order to simplify the setting and dosing of the individual components considerably. Another object of the invention is to achieve a high production output and yet to achieve a good opening and great weighing accuracy. These objects are achieved by the features of claims 1, 15 and 17 in combination and in each case for themselves. Further details of the invention will be described in more detail with reference to the drawings. Show it

FIG. 1
a weighing feeder in a schematic representation
FIG. 2
a mixing plant with three weighing feeders
FIGS. 3, 4 and 5
various curves, according to which the adjustment or control of the system takes place
FIG. 6
a comparison of the flow rate with and without interrupting the promotion
FIG. 7
a weighing feeder with enlarged pre-filling space.

Figure 1 shows a weighing feeder schematically in its construction. The bales 1 ', 1' ', 1' '' are above the feed table 2 and the conveyor belt 3 is supplied to the needle belt 4, which from the fed bales of patties and raises up against the stripper roller 5 promotes. The rear roller 5 is in her Distance to the needle belt 4 adjustable and rotates in the Antisense to the conveying direction of the needle tape 4. Too large Amounts of fiber that rise with the needle tape 4, by this distance of the stripper roller 5 is not allowed to pass, but held back by this. Usually that is Conveyor belt 3 of the feed table 2 and the needle belt 4 drivingly connected with each other. For the needle band 4 is a infinitely variable drive 41 provided so that the needle belt each predetermined by a controller 41 Conveying speed can run. Close to the needle band 4 the rotating at high speed knockdown 6 on, which strikes the fiber material from the needle tape 4 and it opens. The detached by the knock-off roller 6 Fibers or fiber flakes are conveyed into a prefilling space 8, which closed by flaps 9 and against the Weighing container 10 can be shut off. A fan 7 ensures dust extraction. Under the weighing container 10 is a mixing belt 12 along which the in the weighing container 10 weighed fibers are dropped. At the end of Mischbandes 12, a pressure roller 11 is arranged to the Fiber material to a uniform cotton for feeding in to compact a mixing opener 13.

FIG. 7 shows a weighing feeder with an enlarged pre-filling space 80. Parts of this weighing feeder with the same function are Also referred to as in Figure 1, so that the description of the weighing feeder according to FIG. 1 also applies to FIG. 7. over the weighing container 10, a large Vorfüllraum 80 is arranged, up to about 80% of the capacity of the weighing container 10 Has. This enlarged Vorfüllraum serves to during the the settling time of the balance and the discarding of the contents the weighing container 10 supplied on the conveyor belt 12 material take, so that the needle belt 4 without stopping Can promote fiber material. For monitoring the level Vorfüllraumes are on both sides of measuring devices 13th arranged. Preferably, these measuring devices consist of Light barriers.

FIG. 2 shows a system with three weighing box feeders I, II and III, each having a component on the mixing belt 12th discard. The dropping out of the weighing containers 10 takes place in each case so that the components to be mixed are stacked on top of one another and at the same time to move into the mixer opener 13 arrive. That First, the weighing feeder III throws its component content on the mixing belt 12, which this Location transported to Wiegespeiser II. There will be from the Weighing container 10 the next component on the location of Wiegespeisers III launched and both continue to Wiegespeiser I transported that then the third component to the two Apply layers. All three layers run at the end of the conveyor belt 12 under a pressure roller 11 and are the Mischöffner 13 fed, the layer packages continuously mixed and through the pipe 14 to a mixing chamber emits.

The loading of the weighing container 10 takes place in a known Device in such a way that in a first phase of Material transport runs fast without weight control, i. the butterfly valves 9 are closed, and the material accumulates in the Vorfüllraum 8. During this time closes the bottom flap of the weighing container 10 after discarding the last weighing, and there is a balance when the Bottom flap is closed. In a second phase, the Material transport still fast and without weight control, but the butterfly valve 9 opens and throws the accumulated Material in the weighing container 10, the bottom flap closed is. In a third phase follows now with fast material transport a filling of the weighing container 10, up to a certain capacity, which is less than the target weight a signal is triggered, the material transport on a low speed switches, with the rest Filling to the final weight takes place. Is the final weight reached, the material transport is switched off and the butterfly valves 9 closed. There is a calming time from about 2 seconds to final weight measurement. Finally will with still switched off material transport and closed 9, open the bottom flap and open the weighing the mixed band 12 dropped.

The pre-filling serves to increase the production capacity by Reduction of downtime of material transport, since with closed shut-off valve 9 in the first two phases Already the material transport can use again. Indeed is the prefill function according to the known method not applicable if the material transport speed subject to strong fluctuations.

By the method according to the invention these disadvantages eliminated. The material is supplied with different Speeds, but it is constantly in operation, so that no downtime occurs. This has the big one Advantage that through the distribution of the material supply on a longer period, otherwise due to downtime was occupied, with lower material transport speeds can be worked, which leads to a much better Lead opening and more accurate dosage. As another object the invention is unnecessary to adjust the individual Parameters, as the individual speeds for material transport and filling including time intervals optimize it automatically within the weighing cycle and thereby adjust to the different materials at the same time. The procedure according to the invention is as follows:

First, the desired sequence of a weighing cycle in a so-called unit curve. This cycle is over the sum of many empirical values emerged and represents the Material feed percentage over the time of a weighing cycle also in percent, divided into periods is. After the needle belt speed of the weighing feeder with the material flow rate is approximately proportional, provides this unit curve in percent approximately the course of the needle belt speed and thus the material supply or delivery per unit of time. It has surprisingly been found that is the optimal sequence of the material supply speed behaves in all cases approximately the same, so that this curve in the percent representation to all concrete values readily can be transferred. This has the great advantage that the Control device 40 with the unit curve of the expiration of the Weighing cycle and thus an essential parameter entered is, so that for the specific case only the Verwiegezeit and the end target weight to be maintained are to be entered. Of course, an integrated into the controller 40 Calculator also these two values directly from the desired Determine production performance. Because the filling capacity of the Wiegebehälters 10 is specified, calculates the calculator necessary number of weighing cycles and their time span, as well the target weight to be given to each weighing cycle. Based on the specified target weight calculated on the unit curve (FIG. 3) the computer calculates the target weight curve (FIG. 4) which via a target / actual value comparison, the filling of Weighing container 10 by appropriate variation of the fiber delivery is controlled in the weighing container 10. expedient is the needle belt speed by the drive 41st each regulated so that a stoppage of the needle tape 4th not done or only in exceptional cases, so that the Material delivery extends over the entire weighing cycle.

This is done by a large as possible Vorfüllraum 80 (FIG. 7), which is at least half as large on the best about 2/3 to the same size as the weigh bin 10 is, and thus able, a continuous supply of material even during the calming phase of the balance and the dropping of the final weight from the weighing container 10th Only the fine filling quantity does not need the Vorfüllraum record, since these open with flaps 9 directly into the Weighing container 10 drops. This will not only be a significant faster filling and thus greater performance of the Wiegespeisers achieved, but by the now possible lower filling speed a better fiber opening and more accurate filling achieved. Of course, the saving of Downtime of the material supply also to reduce the duration used in the weighing cycle, thereby increasing performance without sacrificing the quality of the opening.

The weighing cycle is essentially divided into three phases, (Fig. 6) in priming (zone A), main filling (zone B) and fine filling (zone C). In addition there is the downtime (Zone D). With a corresponding size of Vorfüllraumes 8 and 80 can be dispensed with the main filling completely, so that the Weigh cycle only in priming (zone A + B + C) and Fine filling (zone D) divided. The pre-filling takes place at closed flaps 9 in the Vorfüllraum 8 and 80th During This so-called prefilling takes place the settling time of the balance and the final weight measurement as well as the opening and dropping of the Final weight on the mixing belt 12 including the possibly necessary taring of the balance. The fine filling always takes place after deflated Vorfüllraum and with open flaps 9, to bring the scale to the final weight. In this way can be saved up to 2 or 3 seconds, which at a usual weighing cycle of 12-14 sec Conveying speed or a performance increase of 15-25% means.

Figure 3 shows the unitary curve for a weighing cycle without downtime of the material supply. As shown in FIG. 3 The flow rate at the beginning of the cycle is about 100 %. This flow rate is about 60% of the time of weighing cycle maintained. Then the flow rate is lowered to about 20% and for the remaining 20 to 25% of the Weighing cycle time with decrease of the flow rate the fine dosage made to final weight. The area under the unit curve represents the total flow rate during the weighing cycle reached and as a final weight on the mixing belt 12th should be dropped. By integrating this unity curve results in the target weight curve (Figure 5). The unit curve is used for each mixed component I, II and III, where 100% is the flow rate required during the weighing cycle time, the target weight of the corresponding Reach component. After all three components the same time for the weighing cycle, the required setpoint speed curve to be reached Target weight. Thus, component I has the highest setpoint speed, here in the example with 60 m per minute, the Component II at 30 m per minute and component III with about 10 m per minute. This corresponds approximately to the mixing ratio of the components of 60: 30: 10.

The control of the mixing process over one out of the unit curve Derived target weight curve can, however, also at the usual weighing cycle with standstill of material handling during calming and weighing. However, FIG. 6 shows in a comparison what enormous advantages the removal of downtime in favor of a has continuous material supply. The strongly drawn unit curve sets the weighing cycle with the usual downtime Zone A indicates the usual prefill time, zone B is the main filling, while zone C is the fine filling and finally the zone D the downtime of the supply indicates. The percentages give as an example a usual Sequence of the weighing cycle. It is irrelevant whether the weighing cycle lasts 12 seconds or 16 seconds. in the In this case, the example was a weighing cycle of Taken 14.5 seconds. As seen in Figure 6, is the downtime at least 25 to almost 30%. By avoidance this downtime for the supply of material at accordingly large Vorfüllraum 80, the conveying speed be lowered to about 60% or taking advantage of the full conveying speed a shortening of the weighing cycle be achieved by 25%. Since the areas under the respective Curves represent the target weight, it becomes clear which advantage the inventive method offers.

The pre-filling takes place with a material conveying speed, which is tuned so that the existing Vorfüllraum 8 or 80 well in the given or available time used and optimally fed. Is the size of the Vorfüllraumes 80 (Fig. 7) about 60 to 80% of the weighing container 10, so the essential filling takes place in this Vorfüllzeit. After opening the flaps 9 this Vorfüllmenge arrives the weighing container 10, and it is only a fine filling with low conveying speed required to to achieve the desired final weight exactly.

The material promotion starts with the through the target weight curve (Fig. 5) conditional conveying speed (Fig. 4). By a setpoint / actual value comparison with the specified target weight curve it is determined which amount is still up to Final weight is to fill. If the difference is very large, so the material conveying speed can only be increased again 100% increase and only for the last 10 or 20% on the Fine promotion be down regulated. The goal is, however, with one the conveying speed is as uniform as possible so that the conveying speed at the following Cycle for this Vorfüllzeit already adjusted in total.

Once the final weight is reached, close the flaps 9 and cut off another supply of material. The material transport does not switch off, but starts immediately to refill the Vorfüllraum 8 or 80, while the balance their calming time and weighing and the weighed Discards material.

To optimally use the Vorfüllraum 8 and 80, it is necessary, the correct speed of the material feed during this prefilling period, because this can from the target speed determined from the target weight curve (Fig. 4) differ by the specificity of the material. Although this can basically be done by hand and by Input of empirical values. It is also possible that the weighing device optimizes itself here. This happens in the following way:

According to a default setting starts at the first Weighing cycle of material transport with a transport speed of about 50%. Depending on the size of Vorfüllraumes 8 or 80 is then after a weighing time of about 60% of the Wiegezyklusses controls what amount of material at the flat rate set Vorfüllgeschwindigkeit in Vorfüllraum 8 or 80 has arrived. Of course this depends on the material, however, this material dependence becomes in this measurement automatically included, since the actual quantity depends on the Conveying speed is measured during this prefilling.

This control can be done in different ways. A Method is, for example, that by opening the Butterfly valves 9, the previously filled Vorfüllmenge in the Weighing container 10 is dropped, so that this intermediate weight can determine which is given to the calculator this compares with the target weight. Is this actual value below the set point, this means that the 50% fill speed is too low and according to the difference between actual value and setpoint must be increased. Already for the next weighing cycle gives the calculator the right conveying speed before, so that an optimal utilization of the Vorfüllraumes 8 and 80 takes place. If the pre-fill quantity is too high, the speed is reduced accordingly. In order to The usual adjustment measures are unnecessary. For refinement This process can also be repeated.

Another way of optimizing the prefill speed is the Vorfüllraum 8 with a measuring device for to equip the degree of filling (measuring probe, light barrier, etc.). The Vorfüllraum 8 is filled until the encoder responds and indicates the filling of the room, causing the flaps 9 to open. At the same time the required time is determined and calculates the optimum filling speed in the calculator and adjusted by raising the default or else is lowered. With this method, the pre-filling quantity then brought to the final weight and as a first weighing be used.

To avoid overfilling the Vorfüllraumes 8, is expedient in optimizing the conveying speed of Such a low conveying speed is assumed in the certainly the complete filling of Vorfüllraumes 8 or 80 is not yet reached. Usually that will be with reached about 50% of the conveying speed. At the first The weighing cycle then becomes about 25 to 70% of the weighing cycle time by comparing the actual weight with the target weight the optimal start speed of the needle belt 4 or the Conveyor speed determined, as already described above.

Of course, it can also be provided that the once determined Conveying speeds for certain materials and Component compositions are saved and repeated same case can be retrieved without a appropriate optimization must take place again. In the In general, automatic self-optimization is more advantageous, because wrong settings are avoided and the staff to set the right prefill speed do not have to worry.

The following weighing cycles are after the optimization the optimal conveying speed. Once the pre-filling is reached, the controller switches to the through the target weight curve specified filling speed. Through a Regulator, which expediently on the delivery speed of the needle belt 4, the speed is along controlled this curve, so that a corresponding decrease the filling speed takes place to the fine dosage when reaching make the final weight. Once this final weight is reached, the cycle is already for the material feed stopped and the speed of the conveyor belt 4 is after closing the flaps 9 to the optimized conveying speed switched, bringing the Vorfüllvorgang and thus the new weighing cycle begins. So while the Vorfüllraum 8 or 80 is already filled with material, the persists Weighing device with weighing container 10 in the settling time, and after expiration of the same is by opening the weighing container 10 the weighed material dropped onto the mixing belt 12.

Of course, even in this weighing process at the end the weighing cycle, the deviation of the actual weight from the nominal discharge weight determined and during subsequent weighing cycles considered. This can, as usual, be done by weight, but it can also optimize the flow the conveying speed to be influenced. This happens so that according to the unit curve remains the same as the cycle of the weighing cycle, however, the calculated correction speed is equal to 100% the flow rate is set and thus the specification of the target weight and derived therefrom target speed curve corrected. This will be a very accurate Weighing achieved.

As can be seen from FIG. 2, there are usually several for the mixture To assemble and mix components. For every component a weighing feeder I, II or III is provided. in the In this case, three components can be mixed. Because the individual proportions of the components are different are large, the filling of the weighing container takes 10 at the customary known filling different lengths, so that the component that determines the largest share, including the longest time needed, so that the other two weighing feeders have finished their weighing process sooner and with the dropping of their Wait for weight on the weighing feeder with the largest amount have to. According to the invention, these three weighing feeders are in their filling speed coordinated so that all cope with three weighings at the same time. As a result of that the target weight curve from the unit curve for each component determined and given to the relevant weighing feeder, becomes the speed curve for the fill speed correspondingly reduced. The priming is slower, however, filling to the final weight regardless of the Vorfüllgeschwindigkeit can also be maintained, so that the same period as the largest component. Since the specified target weight curve from the unit curve is derived here plays the weighing cycle percentage in the same way as the largest Component. A special setting is not required. The unit curve is in each control unit or in specified the control unit of the entire system. So you need it only the desired production capacity or the weighing cycle and the desired final weights for the individual components be entered. Everything else, including optimization the process is controlled by the calculator carried out.

At the beginning as well as at the end of a mixed game always the The controller can also be programmed in the same way be that the discharge of the weighed fiber quantities successively begins and ends one after another, so that always complete Mixing packages arise. In the example in FIG. 2 So is the weighing feeder III its last weighing on the Discard mix tape 12 and then already stop working. The last discharge quantity then reaches the Wiegespeiser II, its component on this last weigh of the weigh feeder III and then ceases its activity. First if this mixed package also passes the last weighing feeder I has, the mixing plant is switched off. Same way the start by starting the weighing feeder III and one by one the weighing feeders II and I are switched on.

In the example described, the process control was through Presetting a desired target weight curve described after which controls the material supply to the weighing container 10 becomes. This target weight curve can also be determined empirically However, it is advantageous, this according to the invention to determine the unit curve.

The optimization of the conveying speed, especially for the prefilling, not only has meaning in connection with the larger Vorfüllraum 80, which is practically the whole capacity can absorb on the remaining filling for fine dosing. Also at The conventional, known weighing method, the enlarged Vorfüllraum 80 be used with success and the Significantly shorten the process or the required conveying speed decrease.

As shown in Figure 6 based on the continuous, heavily drawn Curve, it is quite possible, even for the conventional weighing process with standstill (area D) of Material promotion specify a unit curve and then the Cycle control.

Thus, these parts of the invention is an independent Significance, however, is the optimum by using all achieved this described parts together. The described Designs are only examples and can be found in modified in various ways or otherwise be combined, without leading out of the inventive concept.

Claims (24)

  1. A method of blending fibre components by means of weighing-hopper feeding in which the fibrous material to be proportioned is stripped from fibre bales each and is conveyed by a material supply mechanism into a weighing container which is preceded by a pre-charging chamber, wherein the weighing container is separated from the preceding pre-charging chamber via a controllable flap and the material, after being weighed, is dumped onto a blending belt from the weighing container, characterized in that a desired nominal-weight curve (Fig. 5) is preset for each fibre component of the respective weighing device (I, II, III) according to which the supply of material for charging the weighing container (10) is controlled by appropriately varying the conveying speed.
  2. The process according to claim 1, characterized in that the sequence of the weighing cycle is fixed by the respective percentage of the volume conveyed above the percentage of time of the weighing cycle (unit curve).
  3. The process according to any one of claims 1 or 2, characterized in that the nominal-weight curve (Fig. 5) for each component (I, II, III) is determined from the unit curve (Fig. 3), based on the nominal-weight of the component (I, II, III) that is to be achieved in a weighing cycle.
  4. The process according to one or more of the preceding claims, characterized in that the same duration of the weighing cycle is predetermined for each of the individual components (I, II, III) (Fig. 5).
  5. The process according to one or more of the preceding claims, characterized in that the weighing cycle is subdivided into a pre-charging phase during which the material conveyed is collected in a pre-charging chamber (8; 80), and a precise charging phase (Fig. 6) during which the material conveyed passes directly into the weighing container (10) through the pre-charging chamber (8; 80).
  6. The process according to one or more of the preceding claims, characterized in that the variation of material supply is performed by a change to the conveying speed of the spiked lattice (4).
  7. The process according to one or more of the preceding claims, characterized in that the accommodation of the real weight to the nominal-weight which is preset each by the nominal-weight curve is performed by a controller.
  8. The process according to claim 7, characterized in that the controller influences the actual conveying speed of the spiked lattice (4).
  9. The process according to one or more of the preceding claims, characterized in that the time of the weighing cycle is governed by the speed of the blending belt.
  10. The process according to one or more of the preceding claims, characterized in that the dumping of the fibre volumes weighed onto the blending belt (12) begins successively and ends successively so that fully blended packs will always be formed.
  11. The process according to one or more of the preceding claims, characterized in that the conveying speed of the material supply mechanism (4) for the first weighing cycle is set following the imposition of an empirical value to determine an optimum conveying speed and the real weight achieved is compared to the desired weight after 25 to 70 % of the weighing cycle time and the difference thus determined is used for a correction of the conveying speed of the material supply mechanism (4).
  12. The process according to claim 11, characterized in that the empirical value for optimizing the conveying speed is approximately 50 %.
  13. The process according to one or more of the preceding claims, characterized in that the conveying speed for precise proportioning remains unchanged irrespective of a change to the conveying speed for material conveyance during the pre-charging and/or main charging procedure.
  14. The process according to one or more of the preceding claims, characterized in that the deviation of the real weight from the desired dumping weight is ascertained at the end of the weighing cycle and the difference is taken into account for a correction of the conveying speed.
  15. A method of blending fibre components by means of weigh-hopper feeding in which the fibrous material to be proportioned is stripped from fibre bales each and is conveyed by a material supply mechanism into a weighing container which is preceded by a pre-charging chamber wherein the weighing container is separated from the preceding pre-charging chamber via a controllable flap and the material, after being weighed, is dumped onto a blending belt from the weighing container, characterized in that the material supply mechanism (4) conveys fibrous material throughout the weighing cycle while the weighing container (10) is fed discontinuously.
  16. The process according to claim 15, characterized in that the conveying speed of the material supply mechanism (4) approaches zero towards the end of fine proportioning, but said mechanism resumes its full conveying speed (Figs. 3, 4, and 6) immediately after the closure of the shut-off flaps (9).
  17. A weighing-hopper feeding device wherein the fibrous material to be proportioned is conveyed by a material supply device into a weighing container which is preceded by a pre-charging chamber and the weighing container is separated from the preceding pre-charging chamber via a controllable flap, characterized in that the material supply mechanism (4) has associated therewith a control device (40) which controls the conveying speed of the material supply mechanism (4) according to a predetermined nominal-weight curve (Figure 5).
  18. The device according to claim 17, characterized in that the material supply mechanism has a spiked lattice (4) which detaches fibrous material from the bale supplied and is provided with an infinitely variable drive (41).
  19. The device according to any one of claims 17 or 18, characterized in that the holding capacity of the pre-charging chamber (8; 80) matches the holding capacity of the weighing container (10).
  20. The device according to one or more of the preceding claims, characterized in that the holding capacity of the pre-charging chamber (8; 80) is about 80 % of the holding capacity of the weighing container (10).
  21. The device according to one or more of the preceding claims, characterized in that the holding capacity of the pre-charging chamber (8; 80) is at least the holding capacity of the weighing container (10) less the precise filling volume.
  22. A control device for controlling the conveying speed of a material supply mechanism (4) of a weighing-hopper feeding device for blending fibre components in which the fibrous material to be proportioned is conveyed by the material supply mechanism (4) into a weighing container (10), characterized in that the control device (40) for the fibrous material (I, II, III) to be proportioned has imposed thereon a desired nominal-weight curve (Fig. 5) according to which the control device (40) controls the material supply mechanism (4) for charging the weighing container (10) by varying the conveying speed.
  23. The control device according to claim 22, characterized in that the control device (40) has imposed thereon the sequence of the weighing cycle by the respective percentage of the volume conveyed above the percentage of time of the weighing cycle (unit curve - Fig. 3) from which the nominal-weight curve (Fig. 5) is determinable for each component (I, II, III), based on the nominal-weight of the component (I, II, III) that is to be achieved in a weighing cycle.
  24. The control device according to claims 22 and 23 for controlling the conveying speed of a material supply mechanism (4) of a weighing-hopper feeding device according to one or more of claims 1 to 16.
EP99966838A 1998-12-09 1999-12-07 Mixing fibrous constituents Expired - Lifetime EP1149196B2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE19856447 1998-12-09
DE1998156447 DE19856447A1 (en) 1998-12-09 1998-12-09 Mixing fiber components
PCT/DE1999/003909 WO2000034557A1 (en) 1998-12-09 1999-12-07 Mixing fibrous constituents

Publications (3)

Publication Number Publication Date
EP1149196A1 EP1149196A1 (en) 2001-10-31
EP1149196B1 true EP1149196B1 (en) 2003-07-09
EP1149196B2 EP1149196B2 (en) 2006-06-21

Family

ID=7890286

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99966838A Expired - Lifetime EP1149196B2 (en) 1998-12-09 1999-12-07 Mixing fibrous constituents

Country Status (6)

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EP (1) EP1149196B2 (en)
AT (1) AT244782T (en)
CZ (1) CZ298194B6 (en)
DE (1) DE19856447A1 (en)
ES (1) ES2204185T5 (en)
WO (1) WO2000034557A1 (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10043338A1 (en) * 2000-09-02 2002-03-14 Truetzschler Gmbh & Co Kg Device for operating a feed device for fiber material, e.g. B. box feeder
US6915621B2 (en) 2002-10-16 2005-07-12 Kimberly-Clark Worldwide, Inc. Method and apparatus for wrapping pads
US7082645B2 (en) 2002-10-16 2006-08-01 Kimberly-Clark Worldwide, Inc. Fiber blending apparatus and method
US7758485B2 (en) 2002-10-16 2010-07-20 Kimberly-Clark Worldwide, Inc. Pad folding system and method
KR101012527B1 (en) 2002-10-16 2011-02-07 킴벌리-클라크 월드와이드, 인크. Method and apparatus for making interlabial pads
US6971981B2 (en) 2002-10-16 2005-12-06 Kimberly-Clark Worldwide, Inc. Method and apparatus for making interlabial pads
DE102014111290A1 (en) * 2014-05-07 2016-02-11 Trützschler GmbH & Co Kommanditgesellschaft Device for mixing fiber components
DE202014010744U1 (en) 2014-08-07 2016-06-29 Trützschler GmbH & Co Kommanditgesellschaft Device for mixing fiber components
DE102017115161A1 (en) * 2017-05-15 2018-11-15 Temafa Maschinenfabrik Gmbh Fiber conveying device and fiber mixing plant
DE102018109005A1 (en) * 2018-04-16 2019-10-17 TRüTZSCHLER GMBH & CO. KG Method for operating a spinning plant and thus operated spinning plant

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1044541A (en) 1963-03-06 1966-10-05 Cliffe & Company Ltd Improvements in or relating to weigh-feed mechanisms
DE1510247B2 (en) 1965-02-23 1972-09-28 Control For a periodically operating apparatus
GB1469949A (en) * 1973-05-09 1977-04-06 Toyoda Automatic Loom Works Textile fibre opening apparatus
US3939929A (en) 1973-05-09 1976-02-24 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Apparatus for regulating supply quantity of textile fibers to a weighing device
DE2841494C2 (en) * 1978-09-23 1989-10-26 Koerber Ag, 2050 Hamburg, De
US4448272A (en) 1981-10-09 1984-05-15 Platt Saco Lowell Corporation Method and apparatus for feeding, weighing and releasing fiber
DE3412920A1 (en) * 1984-04-06 1985-10-17 Icoma Packtechnik Gmbh Apparatus for metering filling material into a weighing container
JPH07108730B2 (en) * 1986-03-28 1995-11-22 大和製衡株式会社 Quantitative supply control method
JPH0325523B2 (en) * 1986-10-15 1991-04-08 Chusho Kigyo Jigyodan
DE3740616A1 (en) * 1987-12-01 1989-06-15 Truetzschler & Co A method and apparatus for mixing textile fibers
US4993119A (en) * 1989-04-14 1991-02-19 Roberson James H Fiber opening, mixing, and flow regulating apparatus and method
DD287573A5 (en) * 1989-08-30 1991-02-28 Akademie Der Wissenschaften Der Ddr,De Method for fast and accurate waste-off of fluidable material
EP0622480A1 (en) * 1993-04-20 1994-11-02 Maschinenfabrik Rieter Ag Method for the dosing of pre-set quantities of fibre flocks of different quality and/or colour
JP2601412B2 (en) * 1994-05-20 1997-04-16 池上機械株式会社 Mixing method and apparatus for fiber

Also Published As

Publication number Publication date
AT244782T (en) 2003-07-15
CZ298194B6 (en) 2007-07-18
CZ20012004A3 (en) 2001-09-12
WO2000034557A1 (en) 2000-06-15
ES2204185T5 (en) 2007-03-01
ES2204185T3 (en) 2004-04-16
EP1149196B2 (en) 2006-06-21
DE19856447A1 (en) 2000-06-15
EP1149196A1 (en) 2001-10-31

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