DE1461151A1 - Method and device for dewatering manufacturing material in the manufacture of cardboard on a Fourdrinier machine - Google Patents

Description

2Ü. January 1964 3 / ϋτ - »-

St. Anne's Board Mill Company Limited, bt. Anne's Koad,

Brislington, Bristol (left & land)

Method and device for the dewatering of manufacturing material in the production of cardboard on a Fourdrinier machine (Ji'ourdrinier machine).

The invention relates to the production of paper, cardboard or other similar fiber-containing products, referred to herein generally as ala-cardboard, on a Fourdrinier or Fourdrinier machine, with jjruek on daa on the carrier or conveyor belt or a calibration on the conveyor belt The material that is formed is exerted and the material which is thereby separated from the material in the formation process is removed to a large extent from the exposed surface of the material. Lurch removing water from the exposed surface dee material, a loading of a plurality of layers

Standing cardboard is made as the water is used to form of the second and subsequent layers not through another The material layer or a formed path must pass through it.

The invention is applicable to both single-layer and multi-layer Fourdrinier machines applicable. '

& it of the exposed surface of the material in a mnsdiciit machine is meant the surface which is not in contact with the liand stands. In the case of multi-layer cardboard, with the exposed surface of the material means the surface, which are not in contact with a »purulent material layer, which is in contact with the belt, or not in contact with a formed web which is in contact with the belt is or is not in contact with the exposed layer or formed web of a plurality of such layers or Or combinations thereof.

In the present application the term of a Fourdrinier or Jrourdrinier machine is in its normal meaning, i.e. it is τοπ a cylinder-form machine, sometimes also a hand-made machine called, to-distinguish, with »elcher the education the circumference of a cylinder takes place, and the at least partially formed web is transferred to a mushroom or a wire will.

Regarding the term "forming the material" or "formed Bahn "it is pointed out that material for the

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including provision of board usually 1/2 to 1 1/2 f "Jj'estbes tandteile, this percentage call by removing water to approximately 4>Ji'estbeetaiiäteile is increased, begin! fibers mate in the web and to chain and They assume a structural relationship to one another which thereafter remains essentially unchanged, so that in practice a continuous web is formed. ±. A formed path is of course still under Imiek and / or. or üog to approximately 20 i <> tfestbestandteile dewatered and then continue f through heated rollers and other smock dried.

Eb has been said above that when a web is formed from the material, water is removed to a significant extent from the exposed surface of the material. x; the term "to a considerable extent" is used because in a Fourdrinier machine of the type described, removal of water from the first layer of material, assuming that the tape is not impermeable, takes place to an essentially equal extent from both surfaces by half goes through the tape and the other half goes from the exposed surface. However, from each subsequent layer and from the first layer fed to the first layer in the case of impermeable tape, a small percentage goes through the tape, but in fact, with a third or in every case fourth layer, no water would pass through the tape, although some Water in the second and third layers would be absorbed.

Moving forward to the pressurizing point of a Fourdrinier machine Material is built by the buyers of this atelle ale

a swamp au ±. Lies is not disadvantageous under certain circumstances, thereby a supply of material for forming a web is provided. However, it is desirable that the top surface of the sump be as flat as possible when it comes to the Pressure point advances.

In other circumstances, however, a swamp can be objectionable because if it builds up too much it sometimes extends back to the discharge container from which the material is fed and so disturbs the feed, which can have the consequence that the material flows off over the edges of the conveyor belt and is lost. It can get too much in a vortex become staggered and wavy and disrupt the formation of the path. Swamp bubbles can form in the swamp and during dex Formation get into the web with the result that the end product is poor. On the other hand, the swamp, if that Conveyor belt runs slowly, only insufficiently swirled so that the fibers in the material clump together tend, which in turn has an unfavorable effect on the end product.

The purpose of the present invention is to provide a behind or in front of a pressure training area Material drop when treating material on a Fourdrinier machine to control and steer. Another purpose of the invention is to create a swamp of a certain height to be provided.

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ule invention consists in the fact that by means of a suitable supply of material a small gate of the pressure exertion point is provided as a result of excess compared to the quantity necessary for the formation of the web, and the excess material is removed from the sump so that it cannot reach the parts exerted by the pressure, ( iemäß "Eiterer invention is intended to .tonregelung the depth of the bumpfes beyond the desired amount material are so far away, only the DAT eriorderliche to form the web aienge ä arrive at the pressure applying point may be.

The invention also relates to a device for dewatering material during the manufacture of cardboard on a Fourdrinier or Fourdrinler machine, which has a device for exerting pressure downstream of a material feed device, which supplies material in excess of that required to form the web and thereby provides a material sump the pressure exerting device and includes a material removal device for removing the excess material from the uumpi which enables only the required amount of material to be delivered to the pressure exerting device.

Lie means to remove excess material you can consist of a single eye device or a modification thereof dts excess material can be removed by gravity. Alternatively, the excess material can also be removed from the To be siphoned off in the swamp. With a further modified embodiment know the removal of the excess material

In combination with .schwerkraft and üog.

Lruck applying agents may contain a roller that is capable of an endless. Rebounded tape down to that 'Iräger- or conveyor belt with the formation of a tapering MnzugBChlitzes to guide while the means for removal of water up through the wire downstream of the protective cover are arranged, the arrangement being such that the .brück of the upper wire on the i-inzugssehlitz acts in such a way that water is secreted from the material, which runs up to the drum remover.

In the drawing, the invention is shown in several exemplary embodiments shown.

Fig. 1 shows a side view of a two-layer paperboard production B machine, the latter part of the tugging device being omitted for the second layer of material is. In this figure is a suction operated removal device shown for the excess material.

? ig. Fig. 2 shows, on an enlarged scale, the right or second Device for removing the excess material by

3 shows in one of the i'ig. 2 a corresponding view Modified embodiment of suction removal device.

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. 4 shows a device for skimming over acliüasigeni Material.

. Figure 5 shows removal of excess material through Gravity.

In the figures, a wire is old a dotted line, a layer of material formed by a solid line Line and wetter represented by a dashed line.

At J'ig. 1 contains the two-layer paperboard manufacturing process a feed tank 1 which is a material supply device forms, which feeds material over the entire width of an endless carrier or conveyor belt 2, in the present case iall the band consists of an endless, permeable wire band. The belt 2 runs around the norsial Fourdrinier machine a breast roll 3 around and over rollers 4 and finally back after it has passed over and around other orphans, not shown, to the breast roll 3.

In the direction of flow or killing is behind the material delivery device 1 arranged a pressure application device, which a width of the belt 2 corresponding endless Contains wire band 5, which is and clamping rollers 3 and in particular runs around a forming roller 7.

Ide iOrawalze 7 consists of a wire-covered roller, see above that tifaeaer by their surface hinduichtre ^ errica ^ n. In the.

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In the embodiment shown, it is arranged so that it the l> raht 5 leads straight down, onto the belt 2, so for that the lower strand of the wire 5 runs parallel to the band 2, and a tapering minimum gap 8 for the Uurehgang des kateriale is formed.

In the direction of flow behind the gap 8 is a water removal device 9 provided. Liese extends sicii over the whole width of the jurahte 5 and contains a steep but flexible foam slat or a slice of Io and a water channel 11. Channel 11 derives the // water,

Applying prior to the printing apparatus-5 _f 7 is arranged a oaugkanal T2 whose ulundstüek 15 (tfig. 2) is parallel to the tape 2. Et is adjustably arranged so that the mouthpiece can be stored at a certain height above the band 2, and it extends over the whole width of the band.

I / ie the pressure-exerting device and the suction channel for the second Material layer, i.e. on the right side at i'ig. 1, represents represents a duplication of the device described and therefore does not need to be specifically described.

The device described in Lie operates in the following jieisei

Material is beetändig eugeführt the Aueflußbehältern 1, and da * conveyor belt 2 and the wire 5 are driven in the seal of the arrows "Per wire 5 can also be entrained by .Reibung from the belt. 2 BATH ORIGINAL. '

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The uaugkanal 12 is by suitable means with α he oaugquelle tied together.

The material then begins to flow onto the belt 2, where it is advanced into the pulling gap B. Water is separated from the material by the pressure of the v'alze and the wire 5, 7, so that a large amount of water is squeezed out of the material upwards, into the circumference of the metal 7 and out of it and onto the The top of the wire 5 is carried up to the foam slat 10 into the channel 11 for removal, the material being formed into a continuous web. On the first layer, ie lengthways at Ji ¹ Ig. 1, the half, the other half is running about in the water by the ribbon due to gravity, while up to the "latte foam 10 passes.

formed layer H then läuit under the second outflow container along, where a second layer of material on the already formed layer is laid, this is in the same «Ice drained except that a larger tiasseraenge the Üchaumlatte 1Ü up as passes through the belt 2.

If more material is delivered to the n'alze than under the roller 7 can get through, ea builds up as a swamp. Jolch a swamp 15 is particularly shown in fl. 2 to 5.

x.er itaterialstram can be controlled bsw. ^ tire ^ elt graze so that according to the speed of the Sandeo 2 and wire 5 just enough is supplied to the liinzugaapalt 8, like ea for the formation of the web is required. Its very precise regulation and control is very difficult, and it can happen that too little material is being delivered.

According to the present invention, therefore, material is provided in fc Jberscliaß supplied to the calibration required for the formation of a path and the excess is removed. This is done by means of the suction channel 12 in connection with the transmission speed of the material su the belt 2 causes.

., it is assumed, for example, that the üumpf accordingly the feed rate of the material has a depth of 10 eic and only a depth of 5 cm in the entry gap 8 can be accommodated for the production of the special track,

the üaugkanal 12 is set so that its juundstilck I.

13 5 ODJ is located above üand 2.

This rate is a precise regulation of the amount of the added Jbaterials possible because the device is at the Gewiinaciaten Speed can be put into operation, with the channel 12 inoperative, and this can then be in the üuBipf 15 are lowered so that its mouthpiece 13 is at the desired height of the material. This removes the excess material above this level and it the upper .face of the fuselage is retained when the material

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the i-ruck exercise point 5, 7 progresses further.

^ em channel 12 is given a certain shape in Figs. 1 and 2, which makes it possible that the mouthpiece 15 in the Juinzugsspalt 8 extends into it. & in £ augkanal 12, as in fig. is shown, but is equally suitable.

Instead of the mouthpiece of the suction device 12 after

towards the draw-in gap, it can also be carried out on the delivery container 1 to be judged. In this case he does not need üog to be operated, but it contains a transducer that skims the material according to its drive.

r. 4 Adds a modified embodiment of a device to remove excess material. In this case a curved plate 16 extends across the belt 2 and a blade 17 extends at right angles to the outside Plate 16 backwards in Kiohtung on the delivery container 1. A drainage channel 18 is arranged on each side of the belt 2. In this device, the blade 17 is arranged at the desired height, so that excess material of the sump 15 skimmed or all-painted and through the bend the plate 16 ru the drainage channels 18 is derived.

I ¹ Ig. Figure 5 shows a device which removes the excess material under gravity. In this case let a l & ltte 19 be arranged on each side of the band 2, and the flatten *

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which are tapered at 2u into the gap b, are perforated on a line of holes 21 so that excess material over the lower part of the holes can run out into the drainage channels 1b due to the welding force.

»If desired, the removal of excess can be ftmaterial under the oenwerkraft be supplemented by; 3og, obgleieü. this is not shown. In this irall becomes a bog distributor on the outer surface of the plates 19 for suction attached by excess material.

Excess material can in all cases be returned to the outflow containers 1 or to a main container, from where it is delivered to the outflow containers.

In the drawings it is shown that the forming roller 7 leads the upper wire 5 to the belt 2 downwards so that the inlet gap contains the aleenine opening. The eel 7 can, however, also be at a distance from the band 2, so that a long narrowing opaque extends from the rebate bia up to the foam slat 10. In this .Fall · the greatest pressure is exerted on the material at the edge of the foam slat 10, so that the foam slat forms the pressure-exerting device, and the tube 15 15 extends backwards from the hand over the circumference of the eel 7. The material which exceeds the height of the tapered inlet gap is of course under a certain pressure from the forming roller 7 and / or the wire 5. BAD ORIGINAL

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For purposes of illustration, the parallel lines of seams b and 2 have a very narrow spacing, but it must be taken into account that in practice the lower seam 2 yields under the pressure of the material entering into op alt b, so that it does, although .

ax lormw & lze is shown as if it were reading the two wires together when the machine was running, a long, narrow, tapering suction gap b extends from the circumference over the forming roller 2 to the water discharge device 9, where the slat _Λ 10 extends the two separates ieat and forms the retraction device.

Claims (1)

afcentanspriiche; for the watering of laying material during the adjustment of iappe on an i.aii _fa aiebmascriine (ji.'ourdrinieraiauciiitie), thereby marked, data by appropriate supply of material an oumpf in front of the iruekausiibungsatelle as a result of 'jbersciiuss opposite the filr the formation of the JJalin eriorderlieen close before ^ eüeaer: is eijfefernt and uberBcnussige material from the -Uiüpf can pass αυ daj ej nic ^ t au of iiruckausiibunfcS-αteile. 'learn naeit / itnuprucii 1, characterized gekennzeicnnet, for x.inregelun dais _fc of the ridge of the "uiupfea TLAs on the gewunsciite High de material is ao far away, that only the for the üaiiii necessary j & close to the atelle can be found. Device for the implementation of the terrain according to claim 1, characterized in that it contains a device for the application of material is> overshoe to the amount required for the formation of the ban and a device for removing the excess material. Device according to claim 3, characterized in that the Means "to remove the excess material a" suction device contain. Device according to claim 3, characterized in that the Remove excess material from the hull through a BATH ORIGINAL 809812/0860 - or scraper eriolgt, Device according to Claim 3, characterized in that it lasts excess utiateriai uhter ^ enwerkrait is removed. / orricntung nacii claim 6, characterized 0ekeDn20icL.net, dat> the removal of excess material due to old workmanship a Jau ^ device is added. Device according to claim 4, characterized in that the Suction device contains a suction channel (12) whose uindsttick (13) is arranged at the height above which calibration of the material in which oil is in excess of that which is used for education a web is required. Device according to claim 5, characterized in that the Abachöpf- or stripping device a pick-up / bweiser contains, which is arranged at the height above which calibrate the material is located in the sump in excess of the eur required to form a web, creating the susceptor or deflector brushes off the excess material and deflects it. Device according to claim 6 or 7, characterized in that the plates (19) are arranged on the sides of the frame (15), which are perforated in height, above which material in the abundance in excess also for the formation of an ammunition required, whereby the excess material drains under gravity. 8098 12/0860 f &> 1/20/64 / Er Apparatus according to claim. 10, characterized in that a suction manifold device is arranged on the outside of the JDurohloohungen of the plates (19) to facilitate the removal to support the excess material under gravity Device according to one of the preceding claims 3 to 11, characterized in that the pressure exerting means a Orphan (7) contain, "calibrate an endless wire band (5) on the Carrying or conveyor belt (2) to form a "tapering suction gap (8), while means £ U" remove Clay barrels are arranged up through the wire in the Förderriehtung behind the gap (8), this arrangement is made so that by the pressure of the upper waist (7) water is separated from the material at the suction gap which the Waeeerentfernungeaitttl goes through. 809812/0860