CN1735731B

CN1735731B - Device for dry-forming a web of fibers with an innovative suction box, and associated method

Info

Publication number: CN1735731B
Application number: CN038258463A
Authority: CN
Inventors: A·塞利
Original assignee: A Celli Nonwovens SpA
Current assignee: A Celli Nonwovens SpA
Priority date: 2003-01-22
Filing date: 2003-01-22
Publication date: 2013-03-13
Anticipated expiration: 2023-01-22
Also published as: CN1735731A; BR0318022B1; DK1585858T3; AU2003213354A1; EP1585858A1; WO2004065688A1; HK1088050A1; JP2006513334A; BR0318022A; ES2397695T3; EP1585858B1

Abstract

The device comprises: a fiber distribution head (3); a forming wire (9) movable underneath the said head in a feeding direction (f 9); a suction box (7) located on the opposite side of the forming wire (9) to the head (3) and connected to a suction system. The suction box (7) is divided transversely with respect to the direction of feeding of the forming wire (9) into at least two longitudinal sections, extending in the direction of feeding of the forming wire. Moreover, control members (29) are envisaged for controlling suction in each of the longitudinal sections in an independent manner with respect to the other longitudinal sections.

Description

The fibroreticulate device of dry process and correlation technique with gettering container of innovation

Technical field

The present invention relates to a kind ofly for the fibroreticulate device of dry process, such device comprises: the fiber distribution head; Forming net movably under described distribution head; Be arranged on described forming net with respect on the heteropleural of described distribution head and be connected to the gettering container of suction system.

The invention particularly relates to a kind of gettering container of the novel form for such device.

According to different aspects, the present invention relates to the fibroreticulate method of a kind of dry process.

According to advancing on the one hand, the present invention relates to a kind of gettering container for dry process fiber web device.

Background technology

For net or the thin slice, particularly paper (blotting paper or cotton paper) of producd fibers material, normally used method and machine for the slurry of distributed fibers cellulose fiber on forming net in order to form thin net.Then this Netcom crosses suction and carries out drying by warm-up mill or other drying device subsequently.

A kind of especially quite blotting paper of thickness of paper, new method of for example producing the amenities such as baby diaper or sanltary towel made appearred recently.The method imagination distributes by the fiber web of air-flow supply at forming net.The method is called " air lay " method.

In order to realize the dry process method, fiber distributes and overcomes many shortcomings and the problem that this new technology relates in order to obtain as far as possible uniformly to have designed various devices.

Generally, air lay imagination suspension fiber and deposit them at forming net in air-flow produces air-breathing under above-mentioned forming net in order to transmit the fiber of supplying from superposed forming head.Fiber is by using various technology to distribute in air-flow.

It is the forming head of cancellated screen cloth that the device imagination use of the first kind has the bottom, and the fiber of being drawn by air-flow passes screen cloth.Forming net moves in the screen cloth bottom, screen cloth Closed forming head bottom, and fiber deposits in order to form net at forming net.Namely be arranged on the bottom closure screen cloth of forming head perpendicular to forming net and perpendicular to the propeller of the axle of screen cloth rotation around vertical axis.Draw fiber and fiber laydown on forming net by the air-flow of the closed screen cloth by described forming head.The example of the device of preparation is described in GB-1499687, GB-1559274, US-A-3581706, US-A-4014635, US-A-4157724, US-A-4276248, US-A-4285647, US-4335066, US-A-4351793, US-A-4482308, US-A-4494278, US-A-4627953, US-A-5527171, US-A-5471712, WO-A-9105100, WO-A-9522656, WO-A-9610663, WO-A-9954537 and EP-B-616056 in this way.

Be used for using one or more pipelines with holes with the axle that is parallel to forming net in the device imagination of the second type of the fiber that passes the air-flow that forming net sucks.Gush out the hole of fiber in pipeline of being drawn by air-flow and be deposited on that feeding direction advances below forming net on.Such forming head has been described in EP-A-032772.Pair of pipes with parallel axes is arranged in the top of forming net.Pipe has foraminate wall, is gushed out by above-mentioned foraminate wall by the streamed fiber of gas of described pipe inside.In order to allow fiber to be easier to gush out and prevent hole plug, arrange the rotary shaft that is equipped with radial tips, and this rotary shaft has the axle of the axle that is parallel to described pipe.Radial tips also has the function of the broken any fibre agglomerates that forms in transmitting air-flow.Basically describe in US-A-4352649, WO-A-8701403 and EP-B-188454 based on the device of same principle.Forming head does not have the bottom closure screen cloth in these devices, and air-flow and suspension fiber all be limited to the foraminate wall pipe interior, and foraminate wall has the function of closed screen cloth of the forming head of the above-mentioned first kind.

US-A-6233787 has described the fibroreticulate device of a kind of dry process, wherein receives the header arrangement of the air-flow with suspension fiber on forming net.This head has a series of axostylus axostyles or roller in the bottom, these axostylus axostyles or roller have parallel to each other and be parallel to the axle of forming net and laterally extending with respect to the feeding direction of forming net.Above-mentioned axostylus axostyle or roller have radial tips or the bar that extends with the bottom opening of the described head of basic closure, form a kind of wall that can pass through, and this wall allows to be passed through by the fiber that the air-flow that sucks from the forming net below is drawn.

EP-A-159618 describes the fibroreticulate device of a kind of dry process, comprises the forming head that is positioned at forming net top, sucks the air-flow of drawing fiber by forming net.Closure is carried out by the fixed grit with perforation in this forming head bottom, in order to allow fiber to pass through screen cloth.Have and be parallel to forming net and be arranged on fixing screen cloth top perpendicular to a plurality of rollers of the axle of the feeding direction of forming net.Described roller is equipped with radial tips, and is installed on the continuous conveyer, and this continuous conveyer causes the translational motion that is parallel to the forming net feeding direction.

Everyone name with the application has been described among the co-pending international patent application PCT/IT02/00657 in application on October 15th, 2002 at the effective especially head for the preparation of the air-flow forming net aspect the uniformity of fiber distribution.

Can know so far from above special notice to be placed on the head that is designed for distributed fibers on forming net, in order to obtain the required uniformity that fiber distributes in final products always.On the other hand, less attention directing is under forming net and the design of the gettering container of placing on the head opposite of sending fiber.Usually this gettering container has very simple form, does not have the special characteristic that the product quality that allows separating device is improved.

Summary of the invention

The object of the present invention is to provide a kind of device that uses so-called air lay dry technique producd fibers net, its gettering container by specific useful form allows obtaining special benefit aspect the uniformity of fiber thickness and distribution.

By read following text to those skilled in the art will become significantly these and further purpose and advantage basically obtain by following device, this device comprises: the fiber distribution head; On the feeding direction under described distribution head forming net movably; Be positioned at described forming net with respect to the heteropleural of described distribution head and be connected to the gettering container of suction system.It is characterized in that according to the present invention: the feeding direction gettering container with respect to forming net laterally is divided at least two longitudinal components that extend at feeding direction.And, control element be used for with respect to other longitudinal component independently mode be controlled at air-breathing in each described longitudinal component.

In this way, can have from a part to another part variable air-breathing be level of vacuum, therefore have the possibility of optimizing in the horizontal fiber distribution profile in final products.For example, can be by increasing or reduce the air-breathing greater or lesser fibre stream that compensate from the distribution head above being positioned in the different piece of case, so that make product has equal densities along whole cross section fiber or same thickness or identical quantitative.

On the contrary, when needs obtain to have inhomogeneous cross direction profiles quantitatively, during the product of thickness or density, still can obtain by adjustment suitable in the different piece that laterally is separated at gettering container is air-breathing.

The different piece that gettering container laterally is separated into can all be connected to single aspirating air pipe, arranges flashboard (shutter) valve or door between different piece,, reduces air-breathing cross section that is, in order to change the suction condition at every partial interior of case.Yet according to a preferred embodiment of the invention, each is connected to himself independently aspirating air pipe in the described longitudinal component that gettering container laterally is separated into.Corresponding fan can be with each be linked together in these pipelines.Be used for the electronic system that control activates the different motor running conditions of each fan thereby for example use, obtain more effective and the air-breathing possibility of rapid adjustment in different piece.On the other hand, when each longitudinal component of case was connected on the single aspirating air pipe by lock gate hatch or valve, each or valve can be linked together with the actuator that is connected on electronically actuated and the control system.

Feedback-the loop of the sensor formation control in downstream that in both cases can both be by a series of distribution head that are arranged in gettering container and building mortion are provided-namely, above-mentioned a series of sensors detect the control parameters, for example the thickness of net or quantitatively.On the basis of the signal that is produced by sensor or a plurality of sensor and with the predetermined value of control parameter, compare, can produce the feedback signal for the driven motor of the longitudinal component of adjusting slide valve or door or be separated into from gettering container different fans linked together.Do not get rid of following possibility: a plurality of fans and the aspirating air pipe that for example are less than the overall quantity of the part that case laterally is separated into by imagination, with choke valve or door and aspirating air pipe independently and the possibility that combines for the motor of different fans, and one or more described aspirating air pipes are separated into several parts, each part is equipped with the slide valve with himself running actuator of himself or the possibility of door.

Valuably, different aspirating air pipes are connected on each longitudinal component of gettering container at the place, end of gettering container, and the end of above-mentioned gettering container is positioned at the downstream with respect to the feeding direction of forming net.In this way, as expressed below, because air amount stream has the speed that has the component that is parallel to the forming net feeding direction, so obtained the optimum operation of gettering container.

According to the embodiment of practicality, extend upward until a longitudinal subdivision wall that is less than the height of forming net plane of lie by the bottom from case, gettering container is separated into longitudinal component.In this way, avoided relative each partition wall of fiber web to have the risk of discontinuity.And fully little in plane of lie and the distance between the partition wall of forming net, in order to can have different suction condition at the different longitudinal portions of gettering container.

According to modified embodiment of the present invention, by horizontal (namely being substantially perpendicular to the feeding direction of forming net) and the partition wall from extending towards the gettering container bottom near the zone of forming net plane of lie, gettering container further is separated at least two transverse areas disposed adjacent one another on the forming net feeding direction, keeps simultaneously horizontal partition wall to separate with the case bottom.And adjustable shutter elements and each described transverse area are linked together, in order to regulate the air-flow that sucks each described zone.Thereby can increase the validity of whole device.

In fact, consider the single part of forming net, when it passes through between distribution head and gettering container, increasing fiber deposits thereon, described fiber is increased in the loss of head in the fiber conveying air-flow (being air stream), the air-flow of above-mentioned transmission is inner by in forming net and the inhale case from distribution head, deposit fiber on forming net.In traditional device, this loss of head causes the efficient that diminishes gradually aspect the fiber web in preparation, and this is because the fiber thickness that has deposited at forming net is larger, and is less by the fibre weight of successive sedimentation in the residual movement process of device at forming net.This is by forming net and the fibroreticulate result that makes of part thereon by the caused still less air-flow of loss of head that increases.

Owing to can be adjusted at air-breathing in the lateral part of arranging continuously on the inner online feeding direction of gettering container, so can more apply the getter action of greater strength in the zone of the case in downstream being positioned at respect to the feeding direction of forming net.The air-breathing this loss in head that increases gradually the increase that compensates the thickness that is transverse in the fiber that forms gradually on the forming net, thus so that the last part of gettering container also helps fibroreticulate formation basically.This allows to improve the feed rate of forming net, and therefore the productivity ratio of resulting device is improved.

Be independent of the measure that case is divided into longitudinal component, also can take to increase this measure (by case self is divided into transverse area) of gettering container efficient as unique measure.This has got rid of can adjustment quantitative or the advantage of the cross direction profiles of thickness, but only will increase the efficient of device aspect productivity ratio.When case only is separated on the forming net feeding direction part of arranging continuously or zone by transverse wall, these horizontal partition walls also can extend to the bottom of case, will imagine in this case minute other aspirating air pipe and be used for each transverse area that case is separated into.Also it is contemplated that in this case by the valve that is arranged on the aspirating air pipe to form guillotine mechanism or element, it is contemplated that perhaps independently fan is used for each transverse area.But because each part of manual adjusting tank or the suction condition in the transverse area are enough when beginning to produce, therefore automatic adjustment system is unnecessary in this case.

Of the present invention may embodiment in, each comprises the wall that swings around the teeter axle transverse area that is separated into gettering container restricting element linked together, and this wall is separated into a plurality of parts of the quantity of the longitudinal component that is separated into corresponding to gettering container.

Regulate by swinging wall lever linked together with each, each swings wall and has the locking mechanism that wall is fixed to desired location.

In known manner, gettering container can have a plurality of horizontal profiled parts that can supply forming net to place thereon.These profiled parts can be exchanged valuably, so that they can be replaced when wearing and tearing.They can be arranged as corresponding with the horizontal partition wall that case is separated into transverse area approx.

Valuably, can imagine auxiliary gettering container is arranged in gettering container with respect to the feeding direction of forming net downstream.Extend the length of the size that makes progress the party corresponding to the distribution head of device at the feeding direction of forming net in view of main gettering container, and auxiliary suction box is extended outside the zone by the distribution head effect of installing, and major function is to remain on the fiber web that is shaped on the forming net until this fiber web enters the subsequent working station of production line.Work station subsequently can consist of by the work station that is used for cured fiber or for the new fiber distribution apparatus for preparing second layer fiber on the net.

Auxiliary suction box also can laterally be separated into longitudinal component with the similar mode of having imagined in main gettering container.Each can be linked together with air-breathing adjustment element in these parts that can be limited by corresponding air entry, is used in mode independently as different mouth and therefore air-breathing for the different longitudinal portions adjustment that this auxiliary tank was separated into.

According to different aspects, the present invention imagines a kind of for the fibroreticulate method of dry process, comprises that step is as follows:

-being created in the fiber that suspends in the air-flow, said flow typically is air;

-across the absorption that forming net produces described air-flow, described fiber deposits at above-mentioned forming net, is prepared into net.

Be characterised in that according to the present invention, laterally be divided into the longitudinal component that the feeding direction that is parallel to forming net extends with respect to feeding direction with air-breathing, and with respect to other longitudinal component independently mode be adjusted at air-breathing in each described longitudinal component.

According to the further useful feature of apparatus and method of the present invention and embodiment at attached dependent claims indicating.

The present invention also relates to a kind of gettering container for the fibroreticulate device of dry process, be included in the forming net that advances on the machine direction, it is characterized in that, gettering container laterally is divided at least two longitudinal components that extend in machine direction with respect to machine direction; And control element be used for with respect to other longitudinal component independently mode be controlled at the air-breathing of each described longitudinal component.

Description of drawings

With reference to following description and the accompanying drawing that shows the unrestricted embodiment of practicality of the present invention, will be better understood the present invention.Especially, the identical or corresponding parts of in the accompanying drawings identical numeral indication:

Fig. 1 illustrates the side view of device;

Fig. 2 illustrates along the II-II of Fig. 3 longitudinal cross-section by main gettering container and auxiliary suction box;

Fig. 3 illustrates the perspective view that the gettering container of forming net has been removed in the part;

Fig. 4 illustrates the front view of the IV-IV in Fig. 2;

Fig. 5 illustrates the cross section of the V-V in Fig. 2;

Fig. 6 is illustrated in the amplification of the details of being indicated by VI among Fig. 5;

Fig. 7 illustrates the cross section of VII-VII in Fig. 6;

Fig. 8 illustrates the cross section of the VIII-VIII in Fig. 4;

Fig. 9 illustrates the partial cross section of the IX-IX in Fig. 5; And

Figure 10 illustrates the partial cross section of the X-X in Fig. 5.

The specific embodiment

Fig. 1 integrally illustrates for dry process (using so-called air lay technology) fiber web, for example cellulose fibre.Device by 1 indication comprises whole top or heads by 3 indications on the whole, and bottom 5, and this bottom 5 comprises wherein the gettering container 7 as main element.Forming net 9 passes through between head 3 and gettering container 7, at the fiber webs (referring to Fig. 1) of above-mentioned forming net 9 preparations by 11 schematic indications.

Forming net 9 limits closed path, and is wherein only shown in Figure 1 by two driven rollers 13 and 15 parts that limit.Feeding direction along the forming net in this path is indicated by arrow f9.Arrow f9 also limits so-called machine direction, that is, the material of preparation advance along direction.

The structure of forming head 3 can be any kind, and can make valuably as described in the International Patent Application PCT/IT02/00657 that applies for current applicant.Yet it must be understood that owing to the advantage that has at suction nozzle according to the present invention aspect product quality and the output increase also can combine with the forming head of traditional type to use and bring result of equal value, so the head of other structure also is possible.Usually, the feature of gettering container can combine with the head of making according to different technologies, so that the ad hoc structure of head 3 and description of the invention are irrelevant, and does not therefore illustrate herein.

Head 3 is placed at four strong point 4 places on the structure of lower part (particularly referring to Fig. 1 and 3), and the height of the strong point 4 can be adjusted by vehicularized jack 6.

Can see in according to the cross section of Fig. 2 that particularly gettering container 7 has on the feeding direction of forming net 9 bottom that tilts down to small part from the top.At downstream (with respect to the feeding direction of line 9), gettering container 7 is connected to three aspirating air pipes by 17,19 and 21 indications.These three aspirating air pipes are connected on the fan of three correspondences, and each is equipped with the motor of self above-mentioned three fans, and only schematically show in Fig. 4 and indicate by 23,25 and 27 herein.Fan 23, three motors of 25 and 27 are connected to by on 29 central control units that schematically show, above-mentioned central control unit is connected to by on 31 one of schematically showing or a series of sensor, and the sensor is along the paths arrangement of forming net 9 downstream at the head 3 of device 1, for detection of the thickness of the net 11 that leaves described device or quantitatively.This layout allows with the following mode control device that will describe.Basically, it is contemplated that sensor with linear array or matrix detects the progress by the cross direction profiles of the one or more parameters such as quantitative, thickness, density or other parameter of the net 11 of device 1 preparation (namely on the direction perpendicular to the feeding direction of forming net 9).

Each aspirating

air pipe

17,19,21 is connected on the corresponding longitudinal component that gettering container 7 is separated into by longitudinal subdivision wall 33.Can see in the cross section of Fig. 2 and Fig. 5 that particularly these partition walls extend upwardly to a height that does not arrive the plane of lie of forming net 9 from the bottom of gettering container 7.In this way, be created in three longitudinal components that horizontal direction is arranged mutually on namely perpendicular to the feeding direction of forming net 9 shoulder to shoulder in gettering container 7 inside.In three longitudinal components in each, can set up by increase or reduce

corresponding fan

23,25 or 27 flow velocity can not rely on the suction condition that the suction condition in remaining longitudinal component is adjusted.

When the device running, generation comprises air-flow suspension, that be intended to shape fiber into the net on forming net 9 between forming head 3 and gettering container 7.Because the vacuum condition that produces in gettering container 7 inside draw this air-flow by the structure of forming net 9, and fiber deposits at forming net.By increasing or reduce air-breathing in each inside of three longitudinal components, wherein in above-mentioned three longitudinal components, separate described gettering container by wall 33, can increase or reduce the flow velocity of this air-flow, and the fiber number that therefore increases or reduce to deposit along three longitudinal part branch that the longitudinal component forming net ideal that relative gettering container 7 is separated into is separated into.

It must be understood that the longitudinal component that gettering container 7 is separated into also can be different from three.For example it is contemplated that four, five or more longitudinal components.Also can imagine and be separated into only two longitudinal components.By increasing the quantity of the part that gettering container is separated into by vertical wall 33, increased the complexity of gettering container, but also increased on the other hand be adjusted at the possibility of suction condition transversely-and therefore larger precision ground obtains in the horizontal such as institute's shape thickness into the net, quantitatively or the required cross direction profiles of the controlled parameter the density, i.e. required progress.

By thickness or basis weight sensor 31, can detect in a lateral direction the cross direction profiles of the parameter of surveying (thickness of the net 11 of preparation, quantitative or other parameter), namely make progress, and transmit detected numerical value to central control unit 29.These numerical value can with also can be compared by the described parameter predetermined value that the operator revises.On the basis of the rub-out signal that produces from this comparison, can revise

fan

23,25 and 27 suction condition.In this way, can remain on thickness or the quantitative substantially constant of horizontal online 11.Selectively, can produce and have variable thickness as required or quantitatively or the net of the cross direction profiles of density, for example on of its longitudinal component larger thickness or larger thickness less quantitatively and on different longitudinal components or less quantitatively.

Particularly in according to the cross section of Fig. 2, can observe, because aspirating

air pipe

17,19 and 21 is connected on the gettering container 7 in the downstream end of gettering container 7 with respect to the feeding direction of forming net 9, so at the gettering container 7 inner suction air-flows that form the component with the feeding direction f9 that is parallel to forming net.This has made things convenient for and has comprised in air-flow and by the distribution of the fiber of head 3 supply.

In gettering container 7 zones, forming net 9 is supported by a plurality of horizontal profiled parts 41 that is shown specifically in the cross section according to Fig. 9 and 10.Each profiled parts 41 is supported by the relevant block 43 of the support frame that is screwed into gettering container 7 by screw 45 in its end, and two longitudinal beams of the support frame of gettering container 7 are indicated by 47.Can see in according to the cross section of Fig. 2, provide transverse wall 51 corresponding to four profiled parts 41, described wall is divided into five transverse areas arranging continuously that vertically move on the direction at forming net 9 with gettering container 7.These four transverse walls 51 are supported by the crossbeam 53 that also is fixed on the piece 43.Laterally partition wall 51 has relatively limitedly to lower extension, and laterally partition wall 51 extends an intermediate altitude, makes simultaneously its bottom margin apart from the suitable distance in the bottom of gettering container 7.Why so be for fear of by

draw line

17,19,21 air-breathing obstacle.

Be parallel to each transverse wall 51 and be parallel to the vertical transverse part of the outer wall that limits gettering container 7, be extended with for the axle 57 that supports and install in the swing mode five doors or wall 59, above-mentioned five doors or wall 59 can be around axle 57 rotations, to take different angle positions between upright position shown in Figure 2 and horizontal level.Each wall 59 is formed by three parts along axle 57 alignment.These parts disposed adjacent one another are at the slit of locating corresponding to the place of longitudinal subdivision wall 33 in the confining wall 59, and above-mentioned longitudinal subdivision wall 33 is divided into three longitudinal components with gettering container 7.

Depend on the angle position that each wall 59 is taked, do not rely on other partition wall, between two continuous transverse walls 51-or one of in described transverse wall and between the external transverse wall of gettering container 7-air-breathing cross section can change.In this way, be positioned at forming net 9 bottoms and become five transverse areas corresponding to the region separation of gettering container 7, can be more greatly with respect to other adjacent transverse area in each of this five transverse areas or reduce to lesser extent air-breathing.

By the oscillating motion of lever 61 control walls 59, each can not rely on all the other lever 61 fixing angle positions and is fixed on the predetermined angular position place in the lever 61.The throttling of each in the transverse area that the manual adjustment of this permission gettering container is separated into.For the purpose that this adjustment is intended to, it is enough manually adjusting throttling.In fact, from to be separated into longitudinal component different, above-mentioned this separation is in order be used for to obtain by backfeed loop the thickness of the net produced or quantitative continuous setup, and being separated into transverse area, gettering container 7 has following sole purpose: regulate air-breathing from the more upstream region of gettering container to downstream area more along the feeding direction of forming net 9, so that the larger pressure drop of the assembly that compensation forms by described forming net and by the fibrage that generates at described forming net.

Therefore, the more downstream transverse area with gettering container 7 of maximum ga(u)ge fiber will be opened fully, that is, corresponding wall 59 will can be in the upright position usually.The residue wall that is positioned in each case the transverse area of upstream more will be more and more closed gradually, that is, more tilt with respect to vertical direction.The hinged wall 59 of adjacent in the rear exterior wall of gettering container will become the wall that usually is in closing position.

Although for example when employed fiber type changes, can imagine the possibility of these throttling conditions of adjustment, it is normally enough manually to set these throttlings in various degree.And can provide the automatic adjustment of throttling of transverse area of case or servo auxiliary adjustment under any circumstance.

Particularly in according to Fig. 7,9 and 10 cross section, can see, be used for to support profiled parts 41 and be used for the structure of the piece 43 of lock shaft 57, and the structure energy of the crossbeam 53 of supporting walls 59 and transverse wall 51 is so that can carry out the replacing of wearing and tearing profiled parts 41 in the situation of not removal wall 51 and wall 59.In fact turn on the screw 45 that piece 43 with correspondence one of is locked in the both sides of gettering container and take out described just enough, in order to allow to remove the profiled parts 41 of wearing and tearing and the profiled parts that more renews, this new profiled parts will be locked in the appropriate location by reinserting of piece 43.

Except piece 43 and at the interval location place with respect to piece 43, insert 44 also is fixed on the longitudinal beam 47.Insert 44 and piece 43 form corresponding continuous vertical to the surface in the both sides of gettering container 7, and steel plate 67 is fixed thereon, and the longitudinal edge of forming net 9 is placed on the above-mentioned steel plate and its longitudinal edge slides at steel plate 67.These plates can exchange in the situation of the remaining part of detaching structure not, and under any circumstance have the wearing and tearing of limited extent owing to the reason of the hardness of the material of making them.

Be arranged on the whole the downstream of gettering container 7 at the feeding direction of forming net 9 by the auxiliary suction box of 81 indications.Particularly in the perspective view of Fig. 3, can see, with respect to the feeding direction of forming net 9 on the downstream, at three air entries 83 of auxiliary suction box 81 interior formation, these three air entries 83 in a lateral direction, namely with respect to disposed adjacent one another on the vertical direction of the feeding direction of forming net 9.Opposite with the design of main gettering container 7, the inside of auxiliary suction box 81 be can't help partition wall and is separated into longitudinal component.Yet, provide three air entries arranging shoulder to shoulder each other to allow (by changing the suction condition in each described mouthful) to have the transversely transformable suction condition in the chamber.

These three air entries 83 are connected on the single aspirating air pipe 85 by three slide valves or the door that is schematically shown by 87 (particularly referring to Fig. 3 and 4).Valve 87 can be adjusted manually or automatically.Simultaneously, in auxiliary suction box 81, forming net 9 is to support by profiled parts 41 with similar mode designed in main gettering container 7.

Be to be understood that accompanying drawing only illustrates a kind of possibility embodiment of the present invention, can change form and the layout of this embodiment in the situation that does not break away from the intention that forms basis of the present invention.The Reference numeral that occurs in appended claims only has the purpose according to the description of front and accompanying drawing easy-to-read, and also limits never in any form protection scope of the present invention.

Claims

1. a device that is used for dry process fiber web (11) comprises: fiber distribution head (3); Feeding direction (f9) upper under described distribution head forming net (9) movably; The gettering container (7) of suction system is set and is connected to respect to the opposition side of described distribution head (3) at described forming net (9); Wherein: laterally be divided at least two longitudinal components that the feeding direction at forming net extends with respect to the described gettering container of feeding direction (7) of forming net (9); Each described longitudinal component is connected on the aspirating air pipe (17,19,21) that is separated with other longitudinal component; And air-breathing control element (29) be used for with respect to other longitudinal component independently mode be controlled at air-breathing in each described longitudinal component, it is characterized in that each fan (23,25,27) is linked together with each described aspirating air pipe.

2. device as claimed in claim 1 is characterized in that, is the place, end of the gettering container in downstream at the feeding direction with respect to described forming net (9), and each described aspirating air pipe is connected on the corresponding longitudinal component of gettering container.

3. device as claimed in claim 1, it is characterized in that, determine that at least one sensor (31) of cross direction profiles of at least one parameter of fiber web (11) is arranged in the downstream of described gettering container, air-breathing in described longitudinal component adjusted according to described cross direction profiles, and described at least one parameter is selected from the group that is made of following parameter: described fibroreticulate thickness, described fibroreticulate quantitative and described fibroreticulate density.

4. device as claimed in claim 2, it is characterized in that, determine that at least one sensor (31) of cross direction profiles of at least one parameter of fiber web (11) is arranged in the downstream of described gettering container, air-breathing in described longitudinal component adjusted according to described cross direction profiles, and described at least one parameter is selected from the group that is made of following parameter: described fibroreticulate thickness, described fibroreticulate quantitative and described fibroreticulate density.

5. device as claimed in claim 3 is characterized in that, it comprises and is connected to described sensor and is connected to central control unit on the described air-breathing control element.

6. device as claimed in claim 3 is characterized in that, is fibroreticulate thickness by the described parameter of sensor detected parameters cross direction profiles.

7. device as claimed in claim 4 is characterized in that, is fibroreticulate thickness by the described parameter of sensor detected parameters cross direction profiles.

8. device as claimed in claim 5 is characterized in that, is fibroreticulate thickness by the described parameter of sensor detected parameters cross direction profiles.

9. device as claimed in claim 3 is characterized in that, by the described parameter of sensor detected parameters cross direction profiles be fibroreticulate quantitatively.

10. such as each described device among the claim 4-8, it is characterized in that, by the described parameter of sensor detected parameters cross direction profiles be fibroreticulate quantitatively.

11. device as claimed in claim 1, it is characterized in that, described gettering container (7) is separated into described longitudinal component by longitudinal subdivision wall (33), and above-mentioned longitudinal subdivision wall (33) extends upwardly to a height that is lower than described forming net (9) plane of lie from the bottom of described gettering container.

12. such as each described device among the claim 2-9, it is characterized in that, described gettering container (7) is separated into described longitudinal component by longitudinal subdivision wall (33), and above-mentioned longitudinal subdivision wall (33) extends upwardly to a height that is lower than described forming net (9) plane of lie from the bottom of described gettering container.

13. device as claimed in claim 1, it is characterized in that, described gettering container further is separated at least two transverse areas by means of partition wall (51), described partition wall (51) is along extending towards the gettering container bottom with respect to the lateral arrangement of forming net feeding direction and from the zone near the forming net plane of lie, and partition wall (51) keeps being separated from each other with the gettering container bottom simultaneously.

14. such as each described device in claim 2-9 and 11, it is characterized in that, described gettering container further is separated at least two transverse areas by means of partition wall (51), described partition wall (51) is along extending towards the gettering container bottom with respect to the lateral arrangement of forming net feeding direction and from the zone near the forming net plane of lie, and partition wall (51) keeps being separated from each other with the gettering container bottom simultaneously.

15. device as claimed in claim 13 is characterized in that, adjustable restricting element (59) is linked together with each described transverse area, in order to adjust the air stream that sucks in each described transverse area.

16. device as claimed in claim 14 is characterized in that, adjustable restricting element (59) is linked together with each described transverse area, in order to adjust the air stream that sucks in each described transverse area.

17. device as claimed in claim 15 is characterized in that, each described restricting element comprises that the quantity of the longitudinal component that swings and be separated into corresponding to gettering container around swinging axle (57) is separated into the wall (59) of a plurality of parts.

18. device as claimed in claim 16 is characterized in that, each described restricting element comprises that the quantity of the longitudinal component that swings and be separated into corresponding to gettering container around swinging axle (57) is separated into the wall (59) of a plurality of parts.

19. device as claimed in claim 17 is characterized in that, adjustment (adjusting) lever (61) and linked together for mechanism and each swing wall at selected locking position adjustment (adjusting) lever.

20. device as claimed in claim 18 is characterized in that, adjustment (adjusting) lever (61) and linked together for mechanism and each swing wall at selected locking position adjustment (adjusting) lever.

21. device as claimed in claim 17 is characterized in that, each described swinging axle is roughly placed corresponding to horizontal partition wall, and extends in parallel with it.

22. device as claimed in claim 19 is characterized in that, each described swinging axle is roughly placed corresponding to horizontal partition wall, and extends in parallel with it.

23., it is characterized in that described gettering container has for a plurality of horizontal profiled parts (41) that supports forming net such as each described device in claim 1-9 and 11.

24. device as claimed in claim 23 is characterized in that, described horizontal profiled parts is interchangeable.

25. device as claimed in claim 13, it is characterized in that, described gettering container has for a plurality of horizontal profiled parts (41) that supports forming net, and described horizontal profiled parts (41) is roughly arranged corresponding to described horizontal partition wall (51).

26. device as claimed in claim 24 is characterized in that, each described interchangeable profiled parts (41) by can dismantle and be fixed along the pair of block (43) that the longitudinal edge of described gettering container is fixed.

27. device as claimed in claim 26, it is characterized in that, described gettering container further is separated at least two transverse areas by means of partition wall (51), described partition wall (51) is along extending towards the gettering container bottom with respect to the lateral arrangement of forming net feeding direction and from the zone near the forming net plane of lie, and partition wall (51) keeps being separated from each other with the gettering container bottom simultaneously; Adjustable restricting element (59) is linked together with each described transverse area, in order to adjust the air stream that sucks in each described transverse area; Each described restricting element comprises that the quantity of the longitudinal component that swings and be separated into corresponding to gettering container around swinging axle (57) is separated into the wall (59) of a plurality of parts; Each described swinging axle is roughly placed corresponding to horizontal partition wall, and extends in parallel with it; And every pair of piece is fixed the corresponding swinging axle of the restricting element of corresponding laterally partition wall and correspondence.

28., it is characterized in that the cross section of described gettering container is from upstream to the downstream at the feeding direction of described forming net and increases gradually such as each described device in claim 1-9 and 11.

29., it is characterized in that auxiliary suction box (81) is arranged in described gettering container with respect to the downstream of the feeding direction of described forming net such as each described device in claim 1-9 and 11.

30. device as claimed in claim 29 is characterized in that, described auxiliary suction box is linked together with a plurality of air entries (83) that produce inspiratory flow at the forming net feeding direction.

31. device as claimed in claim 30 is characterized in that, the quantity of described air entry equals the quantity of the longitudinal component that suction muffler (7) is separated into.

32. device as claimed in claim 30 is characterized in that, is used for take independent mode as the different mouthfuls of air-breathing adjustment elements (87) that adjustment is air-breathing linked together with each air entry.

33. device as claimed in claim 32 is characterized in that, described air entry is connected on the single auxiliary aspirating air pipe (85), and linked together with valve and each described air entry of the valve phase independent regulation of other air entry.

34. one kind is used for the fibroreticulate method of dry process, comprises that step is as follows:

-in air-flow, produce fiber suspension;

-across the absorption that the forming net that deposits described fiber on it produces described air-flow, preparing described net, described forming net is mobile at feeding direction;

-with respect to feeding direction with air-breathing laterally be divided into be parallel to the longitudinal component that feeding direction extends, and with respect to other longitudinal component independently mode be adjusted at air-breathing in each described longitudinal component;

It is characterized in that, produce by fan independently and enter the described air-breathing of each longitudinal component.

35. method as claimed in claim 34, it is characterized in that, the cross direction profiles of fibroreticulate at least one parameter that detection prepares at described forming net, and be adjusted at air-breathing in each described longitudinal component according to described cross direction profiles, described at least one parameter is selected from the group that is made of following parameter: described fibroreticulate thickness, described fibroreticulate quantitative and described fibroreticulate density.

36. method as claimed in claim 35 is characterized in that, described parameter is fibroreticulate thickness.

37. method as claimed in claim 35 is characterized in that, described parameter is fibroreticulate quantitative.

38. method as claimed in claim 35 is characterized in that:

-be that each described longitudinal component is set suction condition;

-detect described cross direction profiles;

-described the cross direction profiles that will detect is compared with predetermined cross direction profiles;

-producing feedback signal, the basis that this feedback signal is used for the difference between the cross direction profiles that detects and predetermined cross direction profiles is modified in the suction condition in one or more described longitudinal components.

39. method as claimed in claim 36 is characterized in that:

-be that each described longitudinal component is set suction condition;

-detect described cross direction profiles;

40. method as claimed in claim 37 is characterized in that:

-be that each described longitudinal component is set suction condition;

-detect described cross direction profiles;

41., it is characterized in that the region separation that will be positioned under the described forming net becomes a plurality of transverse areas of arranging shoulder to shoulder each other such as each described method in the claim 34 to 40, and be adjusted at the suction condition in each described transverse area.

42. method as claimed in claim 41 is characterized in that, is adjusted at the suction condition in each described transverse area, so that compensation is because the larger decline at forming net feeding direction overdraught pressure that the accumulation of fiber causes on described forming net.

43. method as claimed in claim 41 is characterized in that, reduces air-breathing on each described transverse area at the feeding direction of forming net.

44. such as each described method in the claim 34 to 40, it is characterized in that, be the place, end of the gettering container in downstream at the feeding direction with respect to forming net, in each longitudinal component of gettering container, produce described air-breathing.

45. a gettering container (7) that is used for the fibroreticulate device of dry process is included in the forming net that advances on the machine direction, wherein: described gettering container laterally is divided at least two longitudinal components that extend in machine direction with respect to machine direction; Air-breathing control element (29) be used for with respect to other longitudinal component independently mode be controlled at the air-breathing of each described longitudinal component; Each described longitudinal component is connected on the aspirating air pipe (17,19,21) that is separated with other longitudinal component; It is characterized in that independently fan (23,25,27) is linked together with each described aspirating air pipe.

46. gettering container as claimed in claim 45 is characterized in that, is in the downstream end of gettering container with respect to the feeding direction of described forming net (9), each described aspirating air pipe is connected on the corresponding longitudinal component of gettering container.

47. gettering container as claimed in claim 45, it is characterized in that, it is separated into described longitudinal component by longitudinal subdivision wall (33), and above-mentioned longitudinal subdivision wall (33) extends upwardly to a height that is lower than described forming net (9) plane of lie from the bottom of gettering container.

48. gettering container as claimed in claim 46, it is characterized in that, it is separated into described longitudinal component by longitudinal subdivision wall (33), and above-mentioned longitudinal subdivision wall (33) extends upwardly to a height that is lower than described forming net (9) plane of lie from the bottom of gettering container.

49. gettering container as claimed in claim 45, it is characterized in that, gettering container further is separated at least two transverse areas by means of partition wall (51), described partition wall (51) is along extending towards the gettering container bottom with respect to the lateral arrangement of machine direction and from the zone near the forming net plane of lie, and partition wall (51) keeps being separated from each other with the gettering container bottom simultaneously.

50. gettering container as claimed in claim 46, it is characterized in that, gettering container further is separated at least two transverse areas by means of partition wall (51), described partition wall (51) is along extending towards the gettering container bottom with respect to the lateral arrangement of machine direction and from the zone near the forming net plane of lie, and partition wall (51) keeps being separated from each other with the gettering container bottom simultaneously.

51. gettering container as claimed in claim 47, it is characterized in that, gettering container further is separated at least two transverse areas by means of partition wall (51), described partition wall (51) is along extending towards the gettering container bottom with respect to the lateral arrangement of machine direction and from the zone near the forming net plane of lie, and partition wall (51) keeps being separated from each other with the gettering container bottom simultaneously.

52., it is characterized in that adjustable restricting element (59) is linked together with each described transverse area such as claim 49,50 or 51 described gettering containers, be used for adjusting the air-flow that sucks in each described transverse area.

53. gettering container as claimed in claim 52 is characterized in that, each described restricting element comprises that the quantity of the longitudinal component that swings and be separated into corresponding to gettering container around swinging axle (57) is separated into the wall (59) of a plurality of parts.

54. gettering container as claimed in claim 53 is characterized in that, adjustment (adjusting) lever (61) and linked together for mechanism and each swing partition wall at selected locking position adjustment (adjusting) lever.

55. gettering container as claimed in claim 53 is characterized in that, each described swinging axle is roughly placed corresponding to horizontal partition wall, and extends in parallel with it.

56., it is characterized in that described gettering container has for a plurality of horizontal profiled parts (41) that supports forming net such as each described gettering container in the claim 45 to 48.

57. gettering container as claimed in claim 56 is characterized in that, described horizontal profiled parts is interchangeable.

58. gettering container as claimed in claim 56, it is characterized in that, gettering container further is separated at least two transverse areas by means of partition wall (51), described partition wall (51) is along extending towards the gettering container bottom with respect to the lateral arrangement of machine direction and from the zone near the forming net plane of lie, and partition wall (51) keeps being separated from each other with the gettering container bottom simultaneously; And described horizontal profiled parts (41) is roughly arranged corresponding to described horizontal partition wall (51).

59. gettering container as claimed in claim 57 is characterized in that, each described interchangeable profiled parts (41) by can dismantle and be fixed along the pair of block (43) that the longitudinal edge of described gettering container is fixed.

60. gettering container as claimed in claim 59, it is characterized in that, gettering container further is separated at least two transverse areas by means of partition wall (51), described partition wall (51) is along extending towards the gettering container bottom with respect to the lateral arrangement of machine direction and from the zone near the forming net plane of lie, and partition wall (51) keeps being separated from each other with the gettering container bottom simultaneously; Adjustable restricting element (59) is linked together with each described transverse area, is used for adjusting the air-flow that sucks in each described transverse area; Each described restricting element comprises that the quantity of the longitudinal component that swings and be separated into corresponding to gettering container around swinging axle (57) is separated into the wall (59) of a plurality of parts; Each described swinging axle is roughly placed corresponding to horizontal partition wall, and extends in parallel with it; And the every pair of piece is the corresponding swinging axle of respective transversal partition wall and corresponding restricting element fixedly.

61., it is characterized in that the cross section of described gettering container is from upstream to the downstream at the feeding direction of described forming net and increases gradually such as each described gettering container in the claim 45 to 51.

62., it is characterized in that described gettering container and auxiliary suction box (81) are linked together such as each described gettering container in the claim 45 to 51, described auxiliary suction box is arranged in the downstream of described gettering container with respect to the feeding direction of described forming net.

63. gettering container as claimed in claim 62 is characterized in that, described auxiliary suction box is linked together with a plurality of air entries (83) that produce inspiratory flow at the forming net feeding direction.

64., it is characterized in that the quantity of described air entry equals the quantity of the longitudinal component that gettering container (7) is separated into such as the described gettering container of claim 63.

65., it is characterized in that it is linked together with each air entry to be used to different mouths to adjust independently air-breathing air-breathing adjustment element (87) such as the described gettering container of claim 63.

66., it is characterized in that described air entry is connected on the single auxiliary aspirating air pipe (85) such as the described gettering container of claim 65, and in the described air entry each is with to be independent of the valve that other air entry regulates linked together.