CN1795296B - Method and distributor for air-laying of fibers - Google Patents
Method and distributor for air-laying of fibers Download PDFInfo
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- CN1795296B CN1795296B CN2004800147176A CN200480014717A CN1795296B CN 1795296 B CN1795296 B CN 1795296B CN 2004800147176 A CN2004800147176 A CN 2004800147176A CN 200480014717 A CN200480014717 A CN 200480014717A CN 1795296 B CN1795296 B CN 1795296B
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- wing plate
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- air
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/70—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres
- D04H1/72—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being randomly arranged
- D04H1/732—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being randomly arranged by fluid current, e.g. air-lay
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
- D04H1/425—Cellulose series
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/70—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres
- D04H1/72—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being randomly arranged
Abstract
A fibre distributor is used for air-laying fibres (4;6) on an endless, air pervious forming wire (9) in a plant for producing non-woven webs. The fibre distributor comprises a forming head (2) with a perforated bottom (7) and rows (14) of rotateable wings (15) situated at a distance above the bottom (7) for during production sweeping supplied fibres (4;6) along the rows (14) of wings (15) in an air stream before they successively leave the forming head (2) through the openings (8) of the perforated bottom (7) for being deposited in a layer (16) on the upper part (17) of the forming wire (2). The fibres (4;6) are, while being swept along in this way, inclined to form nits (20;21). The wings (15) are therefore adapted to rotate with an optimal speed of rotation in an interval where the fibre's (4;6) inclination to form nits (20;21) changes from being lesser to being larger when the rotation speed of the wings (15) grows. By means of the method and the fibre distributor according to the invention it is possible to produce non-woven webs with a minimum of fibre loss in form of nits and at the same time also with an extremely high rate of production.
Description
Technical field
The present invention relates to a kind of method and distributor, it is used at the equipment of making bondedfibre fabric the fiber that is positioned on the annular gas permeable forming wire (wire) being carried out air-laid, and bondedfibre fabric wherein for example is:
-be used for the water imbibition core material of women sanitary articles;
-incontinence article;
-diaper;
-desktop napkin paper;
-such as protecting single grade for medical product on the bed;
-rag; And
-towel.
Background technology
The fine hair that is generally used for making these character goods is: relatively short cellulose fibre, relatively long synthetic fiber or the mixture of these two kinds of fibers.Other material such as SAP (super-absorbert powder) etc. also can be mixed in the fine hair.
Distributor comprises a moulded head, and it is positioned at the top of forming wire, and has porous bottom and the rotatable wing plate of delegation at least, and it is positioned at a distance of top, described bottom.
In the process of making, the wing plate that the fiber that flows to moulded head is embarked on journey in an air flow is swept and is blown, so that can be evenly distributed on the bottom.Meanwhile, a suction unit that is arranged on forming wire below produces one second air-flow, and the aperture and the forming wire of its distributor perforated bottom of flowing through make the fiber that is entrained in the air-flow be deposited to gradually on the fibrage on the forming wire top thus.
Belong to the applicant the 5th, 527, No. 171 U.S. Patent Publications such distributor, this patent documentation is incorporated among the application as a reference.
But when fiber is swept when blowing by the wing plate of embarking on journey in the distributor (rows ofwings) in air-flow, relatively long synthetic fiber especially are easy to and other similar fiber or dissimilar fiber form conglomeration (nit).
Conglomeration is the little entanglement bundle group of fiber, and it is stone and be difficult to break, and also can not broken in the hammer mill even it for example sends back to again.This conglomeration both had been helpless to the volume and the quality of bondedfibre fabric, also was helpless to the intensity of bondedfibre fabric.Thereby, in the process of making bondedfibre fabric, should produce conglomeration as few as possible.
But in practical operation, the fiber up to about 25% in the synthetic fiber that transport has been become useless conglomeration.The fiber that loses by this way need replenish with the good fiber of equivalent.Because the cost of synthetic fiber is high especially, so the cost of final fibre is also very high.
Carry out some tests in the past and sought solution to this problem, these tests show: the fibre weight that becomes conglomeration on the finished product bondedfibre fabric in the unit are is the function of air velocity, increase with speed increases, and wherein, fiber is swept by the wing plate of embarking on journey in this air-flow and blown.
These tests also show: the production capacity of distributor-and then the ability of the production bondedfibre fabric of entire equipment also be described function of speed, increase thereupon increasing.
Thereby, because the capital input of this kind equipment is very high, have high as far as possible speed so should make along the wing plate airflow flowing of embarking on journey during equipment work.On the other hand, this speed again should be very low, so that it is few as much as possible to become the fibre weight of conglomeration on the finished product bondedfibre fabric in the unit are.
Thereby, in real work, must reach a compromise situation, so that relatively low along the wing plate airflow flowing speed of embarking on journey during equipment work, thus the production capacity of equipment is reached far away at full capacity.
Summary of the invention
An object of the present invention is to solve above-mentioned defective of the prior art.
According to a first aspect of the invention, provide a kind of and be used for being positioned at the method that fiber on the annular gas permeable forming wire applies air, the method comprising the steps of:
-to a moulded head conveying fiber, this moulded head has the bottom of perforation and the rotating wing plate of delegation at least, and wing plate wherein is positioned at a distance of top, bottom;
-by rotating wing plate, fiber is swept with first air-flow along delegation's wing plate at least and to be blown, in this process, fiber is easy to form conglomeration;
-rotary speed of wing plate is adjusted in the interval, this interval is round an optimized rotating speed, the fiber of supply is swept with first air-flow along each row of wing plate like this and blown, this optimized rotating speed of described first air-flow is between 5-26m/sec, on this optimized rotating speed, when the rotating speed of wing plate increased, the trend that fiber forms conglomeration was big from little change; And
-aspirating fiber by the aperture on the perforation bottom downwards with second air-flow, can little by little fiber be sunk in the fibrage on the forming wire top.
Preferably, described method comprises the step of the rotating speed of wing plate being regulated according to the constituent of fiber.
Preferably, said method comprising the steps of: select an interval of wing plate rotating speed, this interval is round an average optimal rotating speed, on this average optimal rotating speed, the number of conglomeration is very little or minimum, and interval size is 0.5 times to 1.5 times of described wing plate average optimal rotating speed.
Preferably, the size in described interval is 0.75 times to 1.25 times of described wing plate average optimal rotating speed.
Preferably, the size in described interval is 0.9 times to 1.1 times of described wing plate average optimal rotating speed.
Preferably, said method comprising the steps of:
-be detected as the conglomeration percentage in the fibrage on the molded lines or in the formed bondedfibre fabric;
-will represent the signal of testing result to be input in the computer as input value;
-by means of a program in the computer, utilize described input value to calculate a numerical value, this numerical value representative is at the optimized rotating speed of given time, and on this optimized rotating speed, the number of conglomeration is very little or minimum; And
-will represent the signal of described numerical value from computer, to export as output valve, to send instruction, its rotating speed with described numerical value representative is rotated to wing plate.
According to a further aspect in the invention, provide a kind of and be used for being positioned at the method that fiber on the annular gas permeable forming wire applies air, the method comprising the steps of:
-to a moulded head conveying fiber, this moulded head has the bottom and the rotating wing plate of delegation at least of a perforation, and wing plate wherein is positioned at a distance above the bottom;
-with such rotational speed wing plate, make fiber scan the bottom with certain speed, this speed is between 5m/sec and 26m/sec; And
-aspirating fiber by the aperture in the perforation bottom downwards with second air-flow, can gradually fiber be sunk in the fibrage on the forming wire top.
Preferably, described speed is between 8m/sec and 17m/sec.
Preferably, described speed is between 10m/sec and 15m/sec.
According to a third aspect of the invention we, provide a kind of and be used for being positioned at the method that fiber on the annular gas permeable forming wire applies air, the method comprising the steps of:
-to a moulded head conveying fiber, this moulded head has the bottom and the rotating wing plate of delegation at least of a perforation, and wing plate wherein is positioned at a distance above the bottom;
-with such rotational speed wing plate, make fiber scan the bottom with certain speed, this speed is between 9m/sec and 16m/sec; And
-aspirating fiber by the aperture in perforation bottom downwards with second air-flow, can gradually fiber be sunk in the fibrage on the top of forming wire.
Preferably, described speed is between 11m/sec and 14m/sec.
According to a forth aspect of the invention, a kind of distributor is provided, it is used in the equipment of a manufacturing bondedfibre fabric fiber that is positioned on the annular gas permeable forming wire be applied air, this distributor comprises a moulded head, it has the bottom of a perforation, and a distance above the bottom is provided with the rotating wing plate of delegation at least, be used in process of production the fiber that transports being swept with an air-flow and blow along delegation's wing plate at least, then, fiber leaves moulded head gradually through the aperture of perforation bottom, so that sink on the fibrage on the forming wire top, fiber is being swept when blowing in this manner, be easy to form conglomeration, and the rotary speed of wing plate is adjusted to rotating speed optimum in the interval rotates, this optimized rotating speed is between 5-26m/sec, on this optimized rotating speed, this interval is round an optimized rotating speed, the fiber of supply is swept with first air-flow along each row of wing plate like this and blown, the speed of described first air-flow is between 5-26m/sec, when the wing plate rotating speed increased, the trend that fiber forms conglomeration was big from little change.
Preferably, described distributor comprises: an adjuster, it is used for regulating optimized rotating speed according to the layout of the constituent of fiber and actual fibers distributor.
Preferably, adjuster is suitable for optimized rotating speed is adjusted in the interval, and this interval is round an average optimal rotating speed, on this average optimal rotating speed, the number of conglomeration is very little or minimum, and the size in this interval is 0.5 times to 1.5 times of the described average optimal rotating speed of wing plate.
Preferably, the size in this interval is 0.75 times to 1.25 times of the described average optimal rotating speed of wing plate.
Preferably, the size in this interval is 0.9 times to 1.1 times of the described average optimal rotating speed of wing plate.
Preferably, described distributor comprises:
-one detector, it is used for being detected as the percentage of the fibrage on the molded lines or the bondedfibre fabric conglomeration that forms, and will represent the signal of testing result to be input in the computer as input value;
Program in the-computer utilizes described input value to calculate a numerical value, and this numerical value is represented an optimized rotating speed, and on this optimized rotating speed, the number of conglomeration is very little or minimum, and produces the output quantity of the described numerical value of representative; And
-one or more actuators are used for by receiving described output quantity according to the rotational speed wing plate of described numerical value representative.
Preferably, the distances of adjacent two row between the wing plates equal to add another distance with the distance between two wing plates in the delegation, this another distance at 50mm between the 135mm.
Preferably, this another the distance at 75mm between the 105mm.
Preferably, the distance between wing plate and the perforated bottom at 1mm between the 12mm.
Preferably, the distance between wing plate and the perforated bottom at 2mm between the 7mm.
Preferably, the distance between wing plate and the perforated bottom at 3mm between the 5mm.
In a first aspect of the present invention, a kind of distributor is provided, it belongs to the described type of preface part, and this distributor has higher production capacity than existing type up to now.
In a second aspect of the present invention, a kind of distributor that belongs to the described type of preface is provided, in process of production, the conglomeration that it produced will be less than existing type up to now.
In a third aspect of the present invention, a kind of distributor that belongs to the described type of preface is provided, in process of production, the conglomeration that it produced will be less than existing type up to now, and its productivity ratio is higher than existing type up to now.
In a fourth aspect of the present invention, a kind of distributor that belongs to the described type of preface is provided, it is configured to: in the course of the work, it can be regulated production process according to certain way, to reduce the generation of conglomeration to the full extent.
In a fifth aspect of the present invention, a kind of method that belongs to the described type of preface is provided, utilize this method, can make a kind of production capacity of distributor be higher than up to now existing type.
In a sixth aspect of the present invention, a kind of method that belongs to the described type of preface is provided, utilize this method, can make a kind of conglomeration that work produced of distributor be less than up to now existing type.
In a seventh aspect of the present invention, a kind of method that belongs to the described type of preface is provided, utilize this method, can be producing than the productivity ratio that prior art is higher up to now, and the conglomeration that produces will be less than prior art.
In a eighth aspect of the present invention, a kind of method that belongs to the described type of preface is provided, utilize this method, can regulate production process according to certain way, to reduce the generation of conglomeration to the full extent.
According to the present invention, distributor is arranged for the rotary speed of fin is adjusted to one in the speed interval of an optimal velocity, and on the optimal velocity therein, when increasing the rotary speed of wing plate, the trend of fiber formation conglomeration will be big from little change.
This speed interval is higher than the interval that those skilled in the art think always, this will bring favourable effect, reason is that in order to solve owing to forming conglomeration the test of the problem of fiber loss was shown in the past: when the rotary speed of wing plate increased, the loss of fiber can increase.
On described optimal velocity, productivity ratio also can obtain simultaneously to increase, and can more advantageously bring into play the production capacity of distributor-and then the production capacity of performance complete equipment than existing type up to now thus.
In real work, the optimum rotary speed of described wing plate can change according to the structure of fiber, the constituent of fiber and the dominance condition in the distributor manufacturing parameter.
Thereby distributor can be configured to the rotary speed of wing plate is adjusted in the rotary speed interval, and this interval comprises some speed of non-overall optimum under certain condition.
This interval is round an average speed, and only carries out this adjusting operation according to the constituent of fiber and the structure of actual fibers distributor.This just mean wing plate rotary speed needn't all be optimum if having time, reason is: as indicated above like that, optimal velocity is changeable.
In according to another embodiment of the present invention, by speed being adjusted to continuously on the speed of given time optimum, the rotary speed that can make wing plate is optimum at any time.Can advantageously realize such effect thus: the fiber that loses owing to the formation conglomeration can lack as much as possible.
This embodiment comprises step: be detected as fibrage on the molded lines or the conglomeration quantity in the bondedfibre fabric unit are that forms; To represent the signal of testing result to be input in the computer as input quantity; By means of the program in the computer, utilize this input quantity to calculate a numerical value, the optimized rotating speed of this numerical value representative when given time, on this rotating speed, the number of conglomeration is very little or minimum; And will represent the signal of this numerical value from computer, to export as output quantity, with instruction control wing plate, its rotating speed according to described numerical value representative is rotated.
In this manner, distributor according to the present invention is called self-regulating, thereby in the course of the work, this distributor can be produced bondedfibre fabric automatically making under the minimum prerequisite of fiber loss, can reach high productivity ratio simultaneously.
It is important: reduced the fiber loss that causes owing to the formation conglomeration, thereby, form the used quantity of material of bondedfibre fabric by reducing, but cost saving.On the optimal velocity of wing plate, the loss of fiber also is minimum naturally.
But, the fiber expense that the income that obtains if adopt a plan is lost with forming conglomeration is identical, then this income can be used to control production process, rather than be used for controlling conglomeration content minimum in the finished product fabric unit are, scheme wherein is: make the production capacity of distributor be higher than its production capacity when wing plate is optimum rotary speed.
Description of drawings
Hereinafter will be described in more detail, and in the following description, introduce other advantageous feature and only be exemplary embodiment with reference to accompanying drawing to the present invention, in the accompanying drawings:
Fig. 1 is a schematic side view, represented according to distributor of the present invention, it is used for by means of a moulded head fiber that is positioned on the annular silk thread being carried out air-laid, moulded head wherein has porous bottom and rotating wing plate, and wing plate is used for along described bottom fiber being swept in the course of the work blowing;
Fig. 2 is the vertical view of Fig. 1;
Fig. 3 has represented a segment of bondedfibre fabric with the ratio of amplifying;
Figure line among Fig. 4 has been expressed conglomeration number and the output of each wing plate in the unit interval on the bondedfibre fabric unit are, and these two indexs are represented as along moulded head porous bottom and sweep the function of speed of blowing fiber; And
Fig. 5 is the theory diagram of a control system, and this control system is used in the air-laid process of being carried out by distributor shown in Fig. 1,2.
The specific embodiment
Detailed description hereinafter is based on that such supposition carries out: fiber is to be mixed by the relatively long synthetic fiber of relatively short cellulose fiber peacekeeping.
Distributor 1 comprises a moulded head 2, and it has the import 3 and another import 5 that is used to import synthetic fiber 6 that are used to import cellulose fibre 4.These two imports 3,5 allow each self-corresponding fiber 4,6 to enter in the moulded head in air-flow along the direction shown in the arrow among the figure.
Moulded head has the bottom 7 of a perforation, has some apertures 8 on it.Be provided with the ventilative forming wire 9 of an annular below the bottom, in manufacture process, this forming wire moves on roller 10 along the illustrated direction of arrow.In Fig. 1 and Fig. 2, only expressed the part of described forming wire.
Below forming wire, be provided with a suction box 11.The effect of one aspiration pump 12 is to form negative pressure by an air conduit 13 in suction box.
In this example, five wing plates of embarking on journey 14 have been installed in a distance above the porous bottom, have three rotatable wing plates 15 in every capable wing plate.
In the course of work of distributor, wing plate is rotated according to certain rotating speed, the feasible fiber that transports is swept along the wing plate of embarking on journey in one first air-flow to be blown, first air-flow wherein is to be produced by the wing plate that rotating, thus can be shown in arrow among Fig. 2 like that with Fiber Distribution to whole bottom.
Be in fiber in first air-flow and be subjected to the effect of suction box and aspiration pump and little by little aspirated downwards, thereby be entrained in second air-flow that is produced and pass bottom the porous aperture 8 on 7, thereby deposit on the fibrage 16 on the forming wire top 17.
Forming wire transports this fibrage along the direction shown in the arrow, so that in the subsequent parts of relevant device (not shown), fibrage is carried out further processing according to certain way, thus make required bondedfibre fabric.
Fig. 3 is a schematic enlarged drawing, has represented a segment of bondedfibre fabric 18, contains synthetic fiber 6 and cellulose fibre 4 in this fabric.As can be seen from Figure, some bossy bodies 19 have been formed on the cellulose fibre.Also have some cellulose conglomerations 20 that only constitute by cellulose fibre and the compound conglomeration 21 that constitutes by synthetic fiber 6 and cellulose fibre 4 in the bondedfibre fabric.
Conglomeration is little fibre matting group bundle, and it has reduced the quality of bondedfibre fabric.Another shortcoming is that the version of conglomeration is very fine and close.Thereby must the supply increase of fiber is a certain amount of, this recruitment is haply corresponding to the fibre weight that becomes entangled in the conglomeration, and therefore, this will increase the cost of making bondedfibre fabric.
When beginning, just have some conglomerations in the fiber scroll.In cracking the process of fiber, some conglomeration fiber can be broken and be become good fiber.But meanwhile some other fiber has been tangled into conglomeration, under normal conditions, the amount of this part fiber be greater than broken, become entangled in the fibre weight in the conglomeration.With the raising that cracks speed, the ratio that cracks conglomeration in the fine hair of back also can improve, and it is believed that between 1% to about 1.4%.
From the hammer mill to the forming wire, on 17 in the process of tapetum 16, forming more cellulose conglomeration 20 in the fine hair.The effect as compound conglomeration 21 parent nucleus has been played in cellulose conglomeration 20.In this regard, bossy body 19 plays an important role, and reason is that it can collude and tangles synthetic fiber.
Conglomeration has the trend of growing up gradually in carrying out the air-laid process.After reaching certain size, conglomeration just is tending towards splitting into two or more nodule mass, and then, these nodule mass are just as forming the new parent nucleus of more conglomerations.
Practice shows: the fibre weight of tangling into conglomeration on the finished product bondedfibre fabric in the unit are is along with the speed of first air-flow increases and increases, this situation is similar to the situation in the hammer mill, in hammer mill, the ratio of conglomeration also is to increase with the increase that feed cracks speed.
High-quality bondedfibre fabric means that the conglomeration content of this fabric is very low, if wish to obtain high-quality bondedfibre fabric, produce with lower speed of production with regard to needing production equipment, thereby the consumption expense of fiber is also lower.
But total production cost also depends on the investment of complete equipment, and the investment of this equipment is normally very big.In order to repay the high interest that big investment brings, equipment need be with very high speed of production work.
Thereby, in practice, these equipment are to carry out work with such speed of production: on this speed, the quality of the fabric of being produced is relatively poor relatively, the production capacity of complete equipment is relatively low, thereby, because it is very big to be used to produce the fibre weight of consumption, make that the production cost of fabric is higher relatively, and make that the rate of return on investment of equipment is lower.
The producer of fabric makes a compromise scheme in this manner, and under this trade-off conditions, it is optimum that the utilization rate of the quality of product, price and equipment latent productive capacity all reaches far away.
Can solve this undesirable condition by the present invention, hereinafter introduce the present invention more clearly with reference to Fig. 4, Fig. 4 has expressed a kind of exemplary embodiment of the present invention.
Solid line among the figure is represented on the finished product fabric conglomeration number (n/m on every square metre of area
2), this index is the function of the first air-flow velocity v (m/sec), this air-flow is to produce by fiber is swept the wing plate that blows on the porous bottom of moulded head.In this example, only counted cross dimensions greater than 1mm
2Conglomeration.
Dotted line among the same figure has also been expressed the work output (kg/w/hour) of each wing plate in each hour in the equipment, and this index is the linear function of described speed v (m/sec) haply.
The weight that makes fabric in this example is 0.120kg/m
2, it is that synthetic fiber by 80% cellulose fiber peacekeeping 20% constitute.The average length of cellulose fibre is about 2mm, and the average length of synthetic fiber is about 6mm.
Shown in the arrow among Fig. 2, the wing plate in the same wing plate of embarking on journey is with identical direction rotation, and simultaneously, the direction of rotation of wing plate is opposite in the adjacent lines, fiber is swept along the porous bottom blown thus, and fiber is dispersed on the zone of this bottom equably.
This porous bottom belongs to the type described in No. 99/54537 patent application of the applicant WO, and the name of this patent document is called " screen pack that is used for distributor ".The size of mesh of this web plate is 4.
Above-mentioned specific descriptions are all set up for multiple bondedfibre fabric and current production devices, and this bondedfibre fabric for example is used to make incontinence article.The speed that is used to make first air-flow of described bondedfibre fabric is generally 3m/sec.On this speed, find every square metre in the number of conglomeration be 500n/m
2, and each wing plate output hourly is 12kg/w/h.
Such result is very not satisfied.The poor quality of product, and it is quite big to be used to make the fiber consumption of fabric.Be attached to the also low relatively fact of income, such result makes manufacturing cost very high.
Those skilled in the art is out for obtaining better product, that is to say, seek out the low product of conglomeration content, these technical staff find by practice: speed v for example is reduced to 1.0m/sec from common 3m/sec will makes conglomeration content the fabric from 500n/m
2Advantageously drop to only 67n/m
2The order of magnitude on, still, the cost of this improvement is that output is reduced to 1.0kg/w/h.
Because the production cost of doing like this is very high and hope can provide high-quality product to the client, so those skilled in the art recognizes soon: the speed that reduces by first air-flow in this manner can not solve hope effectively and can reduce conglomeration content and this problem of boosting productivity simultaneously.The technical staff reaches a conclusion: should stop to reduce the test of first air velocity again.
On the other hand, when those skilled in the art attempts according to this mode, reduces production costs by improving output, then can find soon, the cost that output improves will be: every square metre of number of going up conglomeration can unacceptably increase, thereby, in the case, the technical staff should stop further to carry out this type of test.
Thereby, how described technical staff is not testing (making speed away from the speed that adopts usually) with regard to knowing fully aspect the speed, reason is: by carrying out above-mentioned test, the technical staff knows, if speed is heightened or is turned down from common speed (have been found that: this common speed reaches best balance between manufacturing parameter), then can not bring any improvement.
According to the present invention, this technology prejudice has been overcome, and concrete measure is: make wing plate with very high rotary speed working, thereby the flow velocity of first air-flow that is produced is away from the speed that adopts usually.
In a preferred implementation according to the present invention, wing plate is rotated according to such speed: the speed that makes the air-flow of winning is between 9m/sec and 16m/sec, especially between 11m/sec and 14m/sec.
In another preferred implementation according to the present invention, wing plate is rotated according to such speed: the speed that makes the air-flow of winning is between 5m/sec and 26m/sec, preferably between 8m/sec and 17m/sec, especially between 10m/sec and 15m/sec.
As can be seen from Figure 4, the 500n/m of the number of conglomeration when air velocity is 3.0m/sec on every square metre of bondedfibre fabric
2117n/m when reducing to air velocity and being 12.7m/sec
2, meanwhile, output has been brought up to 60kg/w/h.
By adopting according to technology of the present invention, obtained wonderful effect: the content of conglomeration only is about 24% of normal conditions on the finished product bondedfibre fabric, and simultaneously, output is five times of normal conditions approximately.
As can be seen from Figure 4: the 67n/m of the content of conglomeration when air velocity is 1.0m/sec on the finished product bondedfibre fabric
2Increased to the maximum 583n/m when air velocity is 4.4m/sec
2Then, conglomeration content is reduced to the minimum of a value 60n/m of air velocity when being 12.7m/sec
2, afterwards, conglomeration content rises once more.
In the case, the speed of 12.7m/sec is optimal velocity, and on this speed, conglomeration content can reach optimum situation-promptly minimum, and simultaneously, output has had very big increase.For other the equipment and the fabric of other fibrous composition, equally also there is an optimal velocity, this optimal velocity can equal or be different from the optimal velocity in this example.
In the present invention's one preferred implementation, the distance between adjacent two wing plates of embarking on journey equals to add another distance with the distance between two wing plates in the delegation, this another distance at 50mm between the 135mm, especially at 75mm between the 105mm.
In making the process of bondedfibre fabric, may occur changing such as the manufacturing parameter of fibrous composition and structure etc., thereby optimal velocity also will change simultaneously.Thereby, being equipped with an adjuster on the distributor, it is used for the speed with first air-flow
According to the present invention, the size in described interval is 0.5 times to 1.5 times of a certain rotating speed, preferably 0.75 times to 1.25 times, especially in an interval, to adjust between 0.9 times to 1.1 times, and this speed interval is round an average optimal speed., rotating speed wherein is the rotating speed of wing plate when producing described average optimal speed.
Preferably, can implement adjusting automatically according to control system of the present invention, in the theory diagram of Fig. 5, schematically show this control system first air velocity by means of one.
This system comprises a detector 22, it is connected with a computer 23, and this computer links to each other with an actuator 24 that is used to rotate wing plate again, and links to each other with the actuator that is used for other functional entity of driving arrangement, when changing the speed of first air-flow, these actuators should transition activities.
Only expressed actuator 25,26,27,28 and 29 in Fig. 5, they are respectively applied for and drive each functional entity, and these functional entities comprise: the mechanism that the scroll of cellulose fibre is flowed to hammer mill; Cellulose fibre is flowed to the mechanism of moulded head from hammer mill; To the moulded head feed mechanism of composite fibre materials for example; Be driven into the mechanism of molded lines; And the mechanism that produces another air-flow, but other actuator (not shown) that is used to drive other functional entity also can link to each other with this control system.
As can be seen from Figure 1, this detector is disposed in the downstream position of moulded head, and is positioned at the top of fine hair on the forming wire, and this detector can be any suitable type, for example can be digital image detector, laser detector or a supersonic detector.
This detector is used to the conglomeration on the unit are fine hair on forming wire or the bondedfibre fabric is counted, and detects the size of each conglomeration.
Testing result is used as input quantity and constantly sends to computer, and computer also receives the input quantity (not shown), to carry different fibers simultaneously to moulded head.
Be mounted with a program in the computer, this program is suitable for calculating unit are (m on forming wire or the finished product bondedfibre fabric based on above-mentioned information
2) go up the content of conglomeration.
Described above this content is the function of first air velocity like that, and in this example, this function is represented by the block curve among Fig. 4.
The program of computer also is suitable for calculating the derivative of each point on this curve, and adjusts actuator 24 constantly, till to reach the curve upper derivate be zero point.
The operating personnel of equipment are after having understood the present invention and having found the interval that can make first air velocity reach optimum, equipment will begin real work with the speed in this interval, afterwards, governing speed continuously, so that its optimum, this optimal velocity is on the curve to be zero accurate numerical point at the given time derivative.
In the present invention's one preferred implementation, the computer that is used to carry out the control system of air-laid has a memory that is used to store related data, and these data are to obtain in the process of production particular web.By adopting this data, equipment can start the production process to fabric of the same race quickly and easily.
The derivative of maximum of points and minimum point place all is zero on the discharge curve owing to contain in conglomeration, so in an embodiment of the present invention, control program should be able to exclude maximum of points, only the speed with first air-flow is adjusted to minimum point, and this numerical point is the optimum point of curve just.
In order to realize this function, stored some numerical value in the computer, this numerical value is the first air velocity value that prior art adopts, and the program of computer is suitable for excluding a zero derivative point, the numerical value of this point is greater than the speed of given product.
In this manner, just can on any point of curve, begin to produce.
Computer also is suitable for corresponding to the adjusting of first air velocity and regulate other actuator, and these actuators for example are actuators 25,26,27,28 and 29.
According to the present invention, distributor has been realized self-regulation in a manner mentioned above, thereby, in process of production, can produce the minimum bondedfibre fabric of conglomeration form fiber on it automatically, and can produce with very high productivity ratio simultaneously.This equipment also is highly susceptible to startup work.
Claims (22)
1. one kind is used for being positioned at the fiber (4 on the annular gas permeable forming wire (9); 6) apply the method for air, the method comprising the steps of:
-to a moulded head (2) conveying fiber (4; 6), this moulded head has the bottom (7) of perforation and the rotating wing plate of delegation (14) (15) at least, and wing plate wherein is positioned at a distance of top, bottom (7);
-by rotating wing plate (15), along delegation (14) wing plate (15) at least with first air-flow to fiber (4; 6) sweep and blow, in this process, fiber (4; 6) be easy to form conglomeration (20; 21);
-rotary speed of wing plate (15) is adjusted in the interval, this interval is swept the fiber of supply with first air-flow along each row of wing plate like this and is blown round an optimized rotating speed, and the speed of described first air-flow is between 5-26m/sec, when the rotating speed of wing plate (15) increases, fiber (4; 6) form conglomeration (20; 21) trend is big from little change; And
-aspirate fiber (4 by the aperture (8) on perforation bottom (7) downwards with second air-flow; 6), can be little by little with fiber (4; 6) sink in the fibrage (16) on forming wire (9) top (17).
2. method according to claim 1 is characterized in that comprising according to fiber (4; 6) step that constituent is regulated the rotating speed of wing plate (15).
3. method according to claim 1 and 2 is characterized in that may further comprise the steps: select an interval of wing plate (15) rotating speed, this interval is round an average optimal rotating speed, on this average optimal rotating speed, and conglomeration (20; 21) number is very little or minimum, and interval size is 0.5 times to 1.5 times of described wing plate (15) average optimal rotating speed.
4. method according to claim 3, the size that it is characterized in that described interval are 0.75 times to 1.25 times of described wing plate (15) average optimal rotating speed.
5. method according to claim 3, the size that it is characterized in that described interval are 0.9 times to 1.1 times of described wing plate (15) average optimal rotating speed.
6. method according to claim 1 is characterized in that may further comprise the steps:
-be detected as in the fibrage (16) on the molded lines (9) or the conglomeration (20 in the formed bondedfibre fabric (18); 21) percentage;
-will represent the signal of testing result to be input in the computer (23) as input value;
-by means of a program in the computer (23), utilize described input value to calculate a numerical value, this numerical value is represented the optimized rotating speed at given time, on this optimized rotating speed, conglomeration (20; 21) number is very little or minimum; And
-will represent the signal of described numerical value from computer (23), to export as output valve, send instruction to give wing plate (15), its rotating speed with described numerical value representative is rotated.
7. one kind is used for being positioned at the fiber (4 on the annular gas permeable forming wire (9); 6) apply the method for air, the method comprising the steps of:
-to a moulded head (2) conveying fiber (4; 6), this moulded head has the bottom (7) and the rotating wing plate of delegation (14) (15) at least of a perforation, and wing plate wherein is positioned at a distance above the bottom (7);
-with such rotational speed wing plate, make fiber scan the bottom with certain speed, this speed is between 5m/sec and 26m/sec; And
-aspirate fiber (4 by the aperture (8) in perforation bottom (7) downwards with second air-flow; 6), can be gradually with fiber (4; 6) sink in the fibrage (16) on forming wire (9) top (17).
8. method according to claim 7 is characterized in that described speed is between 8m/sec and 17m/sec.
9. method according to claim 7 is characterized in that described speed is between 10m/sec and 15m/sec.
10. one kind is used for being positioned at the fiber (4 on the annular gas permeable forming wire (9); 6) apply the method for air, the method comprising the steps of:
-to a moulded head (2) conveying fiber (4; 6), this moulded head has the bottom (7) and the rotating wing plate of delegation (14) (15) at least of a perforation, and wing plate wherein is positioned at a distance above the bottom (7);
-with such rotational speed wing plate, make fiber scan the bottom with certain speed, this speed is between 9m/sec and 16m/sec; And
-aspirate fiber (4 by the aperture (8) in perforation bottom (7) downwards with second air-flow; 6), can be gradually with fiber (4; 6) sink in the fibrage (16) on the top (17) of forming wire (9).
11. method according to claim 10 is characterized in that described speed is between 11m/sec and 14m/sec.
12. a distributor, it is used in the equipment of a manufacturing bondedfibre fabric (18) being positioned at the fiber (4 on the annular gas permeable forming wire (9); 6) apply air, this distributor comprises a moulded head (2), it has the bottom (7) of a perforation, and a distance of (7) top is provided with the rotating wing plate of delegation (14) (15) at least in the bottom, is used in process of production along the fiber (4 of delegation (14) wing plate (15) to transporting at least; 6) sweep with an air-flow and blow, then, fiber leaves moulded head (2) gradually through the aperture (8) of perforation bottom (7), so that sink on the fibrage (16) on forming wire (9) top (17) fiber (4; 6) being swept in this manner when blowing, be easy to form conglomeration (20; 21), and the rotary speed of wing plate (15) is adjusted in the interval, this interval is round an optimized rotating speed, the fiber of supply is swept with first air-flow along each row of wing plate like this and blown, the speed of described first air-flow is between 5-26m/sec, when wing plate (15) rotating speed increases, fiber (4; 6) form conglomeration (20; 21) trend is big from little change.
13. distributor according to claim 12 is characterized in that comprising: an adjuster, it is used for according to fiber (4; The layout of constituent 6) and actual fibers distributor and regulate optimized rotating speed.
14. distributor according to claim 13 is characterized in that: adjuster is suitable for optimized rotating speed is adjusted in the interval, and this interval is round an average optimal rotating speed, on this average optimal rotating speed, and conglomeration (20; 21) number is very little or minimum, and the size in this interval is 0.5 times to 1.5 times of the described average optimal rotating speed of wing plate.
15. distributor according to claim 14, the size that it is characterized in that this interval are 0.75 times to 1.25 times of the described average optimal rotating speed of wing plate.
16. distributor according to claim 14, the size that it is characterized in that this interval are 0.9 times to 1.1 times of the described average optimal rotating speed of wing plate.
17. distributor according to claim 12 is characterized in that comprising:
-one detector (22), its be used for being detected as molded lines (9) go up fibrage (16) or the bondedfibre fabric that forms (18) conglomeration (20; 21) percentage, and will represent the signal of testing result to be input in the computer (23) as input value;
Program in the-computer (23) utilizes described input value to calculate a numerical value, and this numerical value is represented an optimized rotating speed, on this optimized rotating speed, and conglomeration (20; 21) number is very little or minimum, and produces the output quantity of the described numerical value of representative; And
-one or more actuators (24,25,26,27,28,29) are used for by receiving described output quantity according to the rotational speed wing plate (15) of described numerical value representative.
18. according to the described distributor of one of claim 12-17, it is characterized in that: the distances between adjacent two row (14) wing plates (15) equal to add another distance with the distance between two wing plates (15) in the delegation, this another distance at 50mm between the 135mm.
19. distributor according to claim 18, it is characterized in that this another the distance at 75mm between the 105mm.
20., it is characterized in that according to the described distributor of one of claim 12-17: the distance between wing plate and the perforated bottom at 1mm between the 12mm.
21. distributor according to claim 20, it is characterized in that distance between wing plate and the perforated bottom at 2mm between the 7mm.
22. distributor according to claim 20, it is characterized in that distance between wing plate and the perforated bottom at 3mm between the 5mm.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DKPA200300805 | 2003-05-28 | ||
| DKPA200300805 | 2003-05-28 | ||
| PCT/DK2004/000370 WO2004106604A1 (en) | 2003-05-28 | 2004-05-27 | A method and a fibre distributor for air-laying fibres |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1795296A CN1795296A (en) | 2006-06-28 |
| CN1795296B true CN1795296B (en) | 2010-09-08 |
Family
ID=33483735
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2004800147176A Active CN1795296B (en) | 2003-05-28 | 2004-05-27 | Method and distributor for air-laying of fibers |
Country Status (10)
| Country | Link |
|---|---|
| US (1) | US20060055072A1 (en) |
| EP (1) | EP1633912B1 (en) |
| JP (1) | JP2006529006A (en) |
| CN (1) | CN1795296B (en) |
| BR (1) | BRPI0410699A (en) |
| CA (1) | CA2525289C (en) |
| DK (1) | DK1633912T3 (en) |
| MX (1) | MXPA05012869A (en) |
| PL (1) | PL1633912T3 (en) |
| WO (1) | WO2004106604A1 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DK1397364T3 (en) * | 2001-05-24 | 2007-11-26 | Lilly Co Eli | Newly disclosed pyrrole derivatives as pharmaceutical agents |
| US20100092746A1 (en) * | 2008-10-14 | 2010-04-15 | Jean-Marie Coant | Nonwoven material containing benefiting particles and method of making |
| DE102010035944A1 (en) | 2010-08-31 | 2012-03-01 | Oerlikon Textile Gmbh & Co. Kg | Method and apparatus for dry forming a fibrous web |
| DE102010052010A1 (en) | 2010-11-19 | 2012-05-24 | Oerlikon Textile Gmbh & Co. Kg | Apparatus for dry forming a fibrous web |
| DE102012111815A1 (en) * | 2011-12-22 | 2013-06-27 | Oerlikon Textile Gmbh & Co. Kg | Device useful for dry molding a fiber web, comprises molding head, which has fiber outlet having a molding wire which is arranged above a storage tape and comprises a number of clamping plates connected by rigid holding device |
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| US4494278A (en) * | 1977-11-08 | 1985-01-22 | Karl Kristian Kobs Kroyer | Apparatus for the production of a fibrous web |
| CN1102222A (en) * | 1992-12-31 | 1995-05-03 | 泽韦格.乌斯特(美国)有限公司 | Acquisition, measurement and control of thin webs of in-process textile materials |
| US5527171A (en) * | 1993-03-09 | 1996-06-18 | Niro Separation A/S | Apparatus for depositing fibers |
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| CN1283246A (en) * | 1997-12-23 | 2001-02-07 | 玛丽安娜·埃特拉·埃里克森 | Fiber distributor |
| CN1309738A (en) * | 1998-07-14 | 2001-08-22 | M&J纤维技术有限公司 | NITs separator |
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| CN1370861A (en) * | 2000-12-18 | 2002-09-25 | 里特机械公司 | In-situ detection technology |
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| US4375448A (en) * | 1979-12-21 | 1983-03-01 | Kimberly-Clark Corporation | Method of forming a web of air-laid dry fibers |
| US4335066A (en) * | 1979-12-21 | 1982-06-15 | Kimberly-Clark Corporation | Method of forming a fibrous web with high fiber throughput screening |
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| DK169356B1 (en) * | 1993-03-19 | 1994-10-10 | Kroyer K K K | Apparatus for preparing a web-shaped fiber product by the dry method |
| WO1996010663A1 (en) * | 1994-09-30 | 1996-04-11 | M & J Fibretech A/S | A plant and a process for dry-producing a web-formed product |
| AU3138799A (en) * | 1998-04-21 | 1999-11-08 | Elmgaard Birger Sorensen | Sifting net for a fibre distributor |
| TR200400816T4 (en) * | 2000-05-31 | 2004-07-21 | M & J Fibretech A/S | Plant and method for the dry production of a nonwoven fiber web of short and long fibers, a cotton fiber web comprising cotton liner pulp (CLP). |
| EP1167590A3 (en) * | 2000-06-23 | 2002-09-11 | Maschinenfabrik Rieter Ag | Fibre length measuring |
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2004
- 2004-05-27 DK DK04734995.6T patent/DK1633912T3/en active
- 2004-05-27 BR BRPI0410699-7A patent/BRPI0410699A/en not_active IP Right Cessation
- 2004-05-27 CN CN2004800147176A patent/CN1795296B/en active Active
- 2004-05-27 JP JP2006529640A patent/JP2006529006A/en active Pending
- 2004-05-27 CA CA2525289A patent/CA2525289C/en not_active Expired - Fee Related
- 2004-05-27 WO PCT/DK2004/000370 patent/WO2004106604A1/en active Application Filing
- 2004-05-27 EP EP04734995.6A patent/EP1633912B1/en active Active
- 2004-05-27 PL PL04734995T patent/PL1633912T3/en unknown
- 2004-05-27 MX MXPA05012869A patent/MXPA05012869A/en unknown
-
2005
- 2005-11-01 US US11/265,718 patent/US20060055072A1/en not_active Abandoned
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| US4494278A (en) * | 1977-11-08 | 1985-01-22 | Karl Kristian Kobs Kroyer | Apparatus for the production of a fibrous web |
| CN1102222A (en) * | 1992-12-31 | 1995-05-03 | 泽韦格.乌斯特(美国)有限公司 | Acquisition, measurement and control of thin webs of in-process textile materials |
| US5527171A (en) * | 1993-03-09 | 1996-06-18 | Niro Separation A/S | Apparatus for depositing fibers |
| US5752294A (en) * | 1994-02-22 | 1998-05-19 | Mor; Uzi | System and method for detection of cotton stickiness and neps and other lint qualities in real time and removal of sticky deposits from processed cotton in the gin |
| CN1283246A (en) * | 1997-12-23 | 2001-02-07 | 玛丽安娜·埃特拉·埃里克森 | Fiber distributor |
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Also Published As
| Publication number | Publication date |
|---|---|
| DK1633912T3 (en) | 2014-10-06 |
| CN1795296A (en) | 2006-06-28 |
| JP2006529006A (en) | 2006-12-28 |
| WO2004106604A1 (en) | 2004-12-09 |
| EP1633912A1 (en) | 2006-03-15 |
| US20060055072A1 (en) | 2006-03-16 |
| EP1633912B1 (en) | 2014-07-16 |
| CA2525289C (en) | 2011-11-15 |
| MXPA05012869A (en) | 2006-02-22 |
| PL1633912T3 (en) | 2014-11-28 |
| CA2525289A1 (en) | 2004-12-09 |
| BRPI0410699A (en) | 2006-06-20 |
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