DE2027326A1 - Papermaking equipment - Google Patents

Description

DR ₁ MDLLER-BOReDIPL-PHYS ₁ DR-MANITZ D (PL-CHEM. DR. DEUFEiL DIPL-ING. FINSTERWALD DIPL-ING. GRÄMKOW PATENT LAWYERS

202732a

A 2o95 - Ho / ck June 2, 1970

ALLIS-CHALMBS ΜΑΝΐΐΒΆΟϊϋΗΪΚβ OGMPAHY 1126 South 70th Street, 14 West Ulis, Wisconsin, USA

Papermaking device.

The invention relates to a papermaking device in which pulp is fed from a reversing chamber (headbox) essentially in the tangential direction to a forming roller and is introduced into a gap between two tube elements. These may, for example, one hand of a wire cloth and on the other hand from a felt cloth or both of a wire fabric made "'" Both ■ belt-mit. the intermediate pulp superimpose the Formwalze-

In particular, the invention relates to a paper making

lungsvorriohtung for attachment to a bracket * from at least one forming station with a first endless cloth belt, with a second endless cloth belt " which has continuous pores around it

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BATH ORIGINAL

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to dewater fibrous and aqueous pulp, and with a Form roller ^ which in a predetermined direction of rotation around a horizontal Axis revolves «,

The state of the art in the field of web forming By means of forming rollers, one can subdivide into six types.

The first type, and apparently the earliest type of such machines, developed, used a permeable cylinder (sometimes referred to as a cylinder shape), which when revolved was partially submerged into a container of pulp to the container ⁰ out Sohioht the pulp on the circumferential andes shape up brought "Typical © machines of this type are for example described ©]" Ie the US ~ J? atentsohriften 2οβ Ιοβ and 2O6 IO7 from 1878 _S in the Uli Patent 1,578,729 from d © ra years 1926 and in US patent specification 3,216,891 from <ä @ iä Jata © 1965 «,

The second, and obviously the next, type of such machine to emerge is used © Inen

shot is ο wrong © machines äi @ §er kvt are fo @ => a <ahrl <ab @ au, = i. _o In & ®v IIS ^ fatentoahrift I 856 083. from äsra Jäte © I93§ (©! © Iiq WiQ ₀ ^) msu In d®r US = Patent 2lös 097 from doss year © 1939ο

algae egg © iHGn tibGirlaßo ^ fe UiM ₀ Bai? BI © © qb befliidot sloh alia © with olaora SqII ₀ salQfefe J @ dL © @ fe isi'ö äow

Patents showing typical machines of this type include: U.S. Patent 2,365,658 to U.S. Pat Year 1944; U.S. Patent 2,995,186, issued in 1961; U.S. Patent 2,473,269 issued in 1949; U.S. Patent 2,929,448, issued in 1960; US patent 3,018,825 from 1962; US patent 3,132,990 from 1964; US patent 3,311,533 from 196 ?; and British Patent 1,019,449 of 1966. The latter, namely the British patent, shows one way such machines are used to do this can produce relatively heavy or multi-ply paper.

A fourth type of such machine uses a permeable cylinder " overlaid in part by a pair of belts between which, while the cylinder is overlaid, the pulp is formed into a web. The following US patents, among others, describe typical devices of this type: US Pat. No. 3,056,719 of 1962 (see Pig. 2); US Pat. No. 3,150,037 of 1964; and US patent. 3 2ol 305 from 1965 (see Fig. 3)

In a fifth type of such device, an impermeable cylinder is provided which z »T. from is superimposed on a single belt. Typical machines of this type are disclosed in Pig, 1 of US Pat. No. 3,056,719 and in FIG. 1 of US Pat. shown. In addition, this category falls under the US patent 3 397 112 from 1968.

A sixth type of such machine uses one

109808/0234 _B ad original

impermeable cylinder, the ζ "To of a pair of belts is superimposed. While the belts overlap the impermeable cylinder, the Pulp formed into a web "Following US" patent magazines describe typical machines of this type in U.S. Patent 1,875,075 of 1932; US patent

2 167 44o from 1939J U.S. Patent 3 2ol 3o5 (see Fig. 2) and U.S. Patent 3,224,928 of U.S. Patent No. 3,224,928 Year 1965; U.S. Patent 3,326,745, issued in 19β7ί and U.S. Patent 3,378,080 * U.S. Patent

3,378,435 and U.S. Patent 3,400,045, issued in 1968 ,.

The invention is based on the object of providing a device of the type mentioned above to this effect that the drainage of the pulp is improved, which between two belts (made of wire and felt, for example) that come together and run over a forming roller.

To achieve this object, the device according to the invention is characterized in that the forming roller lies within the endless loop of the first belt, a section of the first belt resting on at least one downwardly moving area of the drum surface endless loop of the second belt is arranged and directs a portion so that it overlaps said portion of the first belt to form a gap, that means for injecting fibrous and aqueous pulp into the gap is provided between those coming together around the forming roll belt can take place dewatering and formation of a fiber web, in that a second guide device innerhalü ^e loop of the second belt is provided to both

109808/0234

Belt with the web in between from the gap along at least a portion of the underside of the To guide the forming roller in such a way that the strand-m of the first belt at the inlet to the second guide device above the one lying on the second belt Web is located, the second guide device then both belts and the web between them steers away from the forming roll and reverses so that the first belt is below and the second belt is above the web comes to rest, and that a third guide device inside the endless loop of the second belt seen in the running direction below the second guide device is arranged around the second belt upwardly away from the track and back to the first guide device as well as leaving the track on top of the first belt with the underside of the track supported and the top of the web is exposed.

The invention thus creates a forest station for training a lane with a reversing chamber or other pulp dispenser located above a impermeable forming roll sits to release pulp into a nip between a pair of belts that merge and overlay a downward moving side of the forming roller. Both straps can be made from wire mesh exist. However, the belt that comes into contact with the forming roller is preferably designed as a felt cloth, while the other belt, which lies further outward in the radial direction than the felt belt, is a fabric made of wire or wire-like material with pores therethrough represents. The pulp is formed into a web sandwiched between the radially inward ones Felt and the wire arranged radially on the outside. That

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109808/0234

Water is squeezed out of the pulp through the wire »In the lower area of the forming roller, the fungus comes to lie above the web and above the wire. The unit of sheet ₁ and wire is removed from the forming roll and moved downward away from it. It is turned so that the wire and the web come to lie above the felt when they run out of the forming station. Then the wire belt is lifted off the web and guided back to the forming roller in a loop ^ while the web remains on the felt belt, with its lower surface supported and its surface exposed. The felt belt represents an endless loop * which extends through each of the stations in the manner described, in order to constantly carry the web formed in the first station and to feed it to the other stations and to guide it through the stations. These stations also bring © Lagon the pulp on the web on o

As advantages of the device according to the invention are

to call;

a) The newly formed web is coming out of the forming station =

performed «while si® is on the surface of a Conveyor belt was lying

b) The belts are removed from the forming roller turned by train, in order to bring both centrifugal forces and gravity to effect, so the water emerges from the train faster and so the train is thrown against the Transpo.rtrieraen * who takes the web out of the forming station »

109

c) The forming station is designed so that a number stations can be connected in series to produce heavy or multi-ply paper; while the web is continuously carried on the surface of the conveyor belt to provide additional Layers of pulp to be provided.

d) The device can be made with either a strap Wire mesh and a belt made of felt that serves as a transport belt for the train or with both belts made of knitted wire or wire-like material.

Further features and advantages of the invention emerge from the following description with reference to the enclosed Drawing from the 'an embodiment of a device represents according to the invention.

The figure shows in side view a pair of forming stations of a papermaking apparatus according to the invention.

The drawing represents part of a papermaking apparatus is used to form fibrous and aqueous pulp into a sheet of heavy paper, cardboard or multi-ply paper. A first forming station 1 is provided, to form the initial web W. In addition, a final forming station 2 is shown for a final position to lay pulp on the top surface of the damp web, in the same way as is done in the first molding station 1. In practice there can be a multitude Intermediate forming stations not shown in series

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109808/023 4

®5a. the ersftQ vjiü- i3tziQ ^ liies? KrLt 1 mM 2- foezeich tation ela ^^ l ^> at we ^ ee *! » Sin © trfpisehe _a wirfc

t; llöh v-Br; icn £ föai ^; 'd yl5i ^; riehfciHJg indicates remaining "steps om οθπθώ. Joels aiic an IrosHastation · consists, the e: 2ftlielien sit; fieri / seseigtsn stations 1 and 2 iiäkiE & rbo ilii άιΜβ & ulgQU KhcI'3 of the last station ami the BaM press ₅ is a recording. , ¹ Ji; ^ clis Bafcxi M atifaunehmen unö to a ge

: ll. (3i ?, ^! 3i ^f i ί? Ρΰ.Η8 ^ ^ 12.Cl © iaeiH just solOiSSii Τν

how you can enter Stations 1 at 2 b

the drawing! «travels the first forming station -

1 has a unique flap 7 (h © ad = box) on <that sits on a holder 8 Dispensing pulp and along a substantially tangential path against the upper portion of a forming roll To bring Io »The forming roller sits in a holder 11 and rotates in the direction indicated by arrows. A first endless cloth belt 12 is over later Means to be described so arranged and performed that it overlays the downward facing side of the forming roll Io. The first strap 12 extends through each Forming station and turns back to the receiving press 3 and arrives again in the first forming station. the Form roll Io of station 1, the form roll loa of the station

2 and the forming rollers of all stations not shown between stations 1 and 2 are in this way all within the continuous endless loop of the first belt 12.

BATH ORIGINAL

109808/0234

Each forming station has a second endless drive belt Mistake. This second gill bears the reference number 14 in the first station 1 and the reference number in the station 2 Reference number 14a. The second belt 14 1st with later to be described means so arranged and guided that he loops the downward running side of the forming roller, the is covered by the first belt 12, superimposed. In this way, the second belt 14 lies above and radially further on the outside of the portion of the first belt 12 overlying the forming roll Io.

The straps 12 and 14 can both be made of wire mesh or synthetic materials that are endless and have pores through to the water to be able to discharge from the fibrous aqueous pulp. However, in some embodiments it may be more advantageous be, only the second belt 14 as a fabric made of wire or the like. to form with continuous pores, then the first belt 12 is advantageously made of felt material. It has a large number of randomly oriented, firmly entangled fibers, with none of them being distinguishable continuous pores are formed.

The forming roller Io lies within the endless one Loop of the first strap 12, but not inside the endless loop of the second belt 14. Inside the latter are a first, a second, and a third Guide device provided to guide the second belt so that it overlaps the area of the forming roll Io, covered by the first strap 12. The first guiding device within the loop of the second Belt 14 consists of a first pulley 18, which is aligned in a holder 11 parallel at a distance

3AD 0R161NAL

109808/0234

to the form orphan Io sifeatο oils Uralenterölle is used to * the * second belt 14 tangentially against the role Io steer to a gap I9 between the first belt 12 UEd to form the second belt 14., The second guide device inside the loop of the Siemens X4 consists of a second pulley 2o and a third Deflection roller 22, the second deflection roller 2o is seated 8-way holder 11, specifically aligned parallel to the forming roller Io and below part of the bottom of the forming roller. It presses the first belt 12, the web W and the second belt 14 against a part on the underside of the forming roll Io. The third pulley 22 is on the Bracket 11 aligned parallel and fixed at a distance from the second deflection roller 2o '. The pulley 22 is below the pulley 2o, in front of this, viewed in the direction of movement of the web W indicated by arrows. The third guide device consists of a fourth Ural castor 24, which is parallel aligned and arranged at a distance from the third deflection roller 22 on a holder 25. The pulley 24 can sit at a distance above the deflection roller 22 and lies in front of it, viewed in the direction indicated by arrows Direction of movement of the web W. An adjustable tension roller 27 is located on each of the brackets 31 and 33 and 29, with the roller 29 inside the loop of the belt 14 and the roller 27 outside this loop is arranged.

An absorbent container 35 which is attached to the holder 11 is, is at a distance above the pulley 22, between the pulleys 2o and 24 and below the Deflection roller 2o to take up the water that flows out between the belts 12 and 14 running around the forming roller Io the pulp is pressed out. The separation tank is

- Io -

109808/0234 bad original

rait a drainage, "" sm. Ζ -! .. ¹ c M

see. Between cl ^r n, »tuir '' _t ""« ^ der-belt 12, 'l4.umi vl <=> - »iii _t '><<cJ;ia".

25 fortified 'SaiigLuhiraof fZj - ι - ^ i ^ x 1 section to untei'""'Je' Jiϊ * em «FUI. Ll

In operation aer i / orasUt
Pulp with '0.5 Ms 1.5 ^ Λ &βΐ' ..., which are distributed 2.11 -99.5 to 98 ^, 553 water, to the 6.r wlilitsöffrying: Q of the reversal chamber 7 '1 »* 3« 2! "SpoJ / c-9 ^ j-" give, if the filaments -12 and 14 lie in between. Pulp come together on the impermeable forming roll Io, - so the water is pressed out of the pulp and flows radially outwards through the belt 14 to run into the separating container 55. The dewatered pulp forms a fiber web. The belts 12 and 14 with the web lying in between are pulled by the deflecting roller 2o against the downward running side of the forming roll Io and move downwards and below the forming roll Io. A combination of an upwardly directed pressure force and a downwardly directed centrifugal force and gravity is effective in order to allow the water to flow accelerated out of the pulp through the belt 1-4 into the separating container 55. While the belts 12 and 14 with the path in between reach the deflecting roller 2o, the belt 12, which is preferably made of felt, lies above the path W and above the belt 14, which is preferably made as a fabric made of wire or the like. is trained. At the roller 2o the belts and the web are reversed so that the belt 14 comes to rest above the web W and the belt 12. The belt and the web are guided by means of the roller 22 away from the roller 2o a path directed downwards onto the roller 22, deflected there and by means of the roller / 24 one

along

- 11 -

109808/0234 bad

directed up to the roller 24 path. When deflecting the belt 12/14 and the web W around the Roller 22 is in turn combined with an upward pressure force and a centrifugal force Gravity to pull water out of the path W in an accelerated manner, but in this case down through the Belt 12.

As the belts 12, 14 and the web W run between the roller 24 and the suction chamber 38, the belt 14 is deflected upwards away from the web W and guided back to the first deflection roller 18. It runs over the tensioning rollers 27 and 29 * die keep the entire endless loop of belt 14 under the appropriate tension. The position of the suction chamber 38 ensures that the web W remains on the belt 12. This continuously supports the web W and guides it, supported on the underside and exposed at the top, to the forming roller (for example roller loa) of each subsequent forming station (for example forming station 2) ₉ The intermediate stations (not shown) and the last station 2 can all be in the same place Way constructed rope and operated in the same way as is apparent from the above description of the first forming station. When the belt 12 below has carried the web W from the last station to the receiving press J, it is deflected by a pulley 4p and then guided over the pulleys 41, 42 and 4j5 to return to the forming roll Io of the first station 3, a take-up roller 44 operating under suction within the loop of a take-up felt 45 can lift the web V1 from the belt 12 in order to guide it through the press station.

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8/0236

training. Although the device described in the Many cases are operated with a felt belt 12 and a wire belt 14, they can also be used with operate two belts made of wire or wire-like fabric.

In summary, the device according to the exemplary embodiment thus consists of a plurality of forming stations 1 and 2 which are connected in series in order to produce heavy or multi-ply paper. Each mold station is provided with a reversing chamber ¹ J above an impermeable forming roll Io to pulp in a gap I9 dispense, formed between a pair of belts 12 and 14 when these come together and overlap by tacking the bottom side of the mold roll Io. Both straps 12 and 14 can be made from wire mesh. Preferably, however, the belt 12, which rests on the forming roller, consists of a felt fabric, while the belt 14, which lies radially further outward than the felt, is made of wire. The pulp is formed into a web W which lies between the radially inwardly arranged felt 12 and the radially outwardly arranged wire belt 14. The water is squeezed out of the pulp web W by the wire belt 14 to the outside. On the underside of the forming roll Io, the felt 12 is placed over the web W and the wire 14, and the assembly of felt, web and wire is peeled off from the forming roll Io, it turns downwards away from the forming roll Io and is turned over, so that the wire 14 and the web W come to lie above the felt 12. The wire 14 is lifted from the web W and returned to the forming roll Io in a single loop, while the web W remains on top of the felt 12 and is guided by it through subsequent similar forming stations 2 in which additional layers of pulp are applied to the web .

109808/0234

The invention includes both a single forming station, as well as an arrangement of several forming stations connected in series for the production of heavy or multi-ply papers.

The above detailed description provides a particularly advantageous way of solving the problem according to the invention Object and to achieve the advantages according to the invention, »However, those skilled in the art are without further accessible modifications are possible within the scope of the invention.

Claims (1)

P a t en t a ns ρ r ü c h e IJ papermaking device for attachment to a Holder, consisting of at least one forming station with a first endless cloth belt, with a second endless Cloth belt that has continuous pores in order to dewater the fibrous and aqueous pulp in contact with it, and with a forming roller, which in predetermined! Direction of rotation around a horizontal Axis revolves, thus marked without t, that the forming roller (lo) lies within the endless loop of the first belt (12), a portion of the first Belt (12) rests on at least one downwardly moving area of the drum surface that a first guide device (18) within the endless loop of the second Belt (14) is arranged and directs a portion so that it said portion of the first belt (12) superimposed to form a gap (19) that a device (7) is provided for shooting fibrous and aqueous pulp into the gap (19) so that between the the belts (12, 14) coming together around the forming roller (lo), a drainage system and the formation of a fiber web (W) can take place that a second guide device (2o, 22) is provided within the loop of the second belt (14) to wrap both belts (12, 14) with the one in between To guide the web (W) from the gap along at least one area of the underside of the forming roller (Io) in such a way that the run of the first belt (12) on running the second guide device (2o) is located above the web (W) lying on the second belt (14), the second guide device (2o) then both belts - 15 - 109808/0234 "■ * ^m 2027328 viiA the "lying in between" © Baten γοη the forming roller away = Isuisij and deflects; so üsM the first gill (12) under = lialb vjiä the arguing Hieiaen (.14) comes _{to run above the web ΰ} and that a third guide device (p ^) is arranged within the endless loop of the second belt (Ik-) seen in the running direction below the second fun = iriingsvorriehtung (2ο _Λ 22), around the second hismen upwards away from the track (W) and back to the 38th guide device (18 ) as well as leaving the track (M) on top of the first belt, with the underside of the baim supported and the top of the track exposed 2. Apparatus according to claim I ₅ characterized in that the first guide device = 'device consists of a first deflection roller (18) above the forming roller (Io), that the second guide device has a second deflection roller (2o) for pressing the first belt ( 12) _{t of} the web (W) and the second belt (14) against part of the underside of the forming roller (Io) and a third deflection roller (22), which is below the second deflection roller (2o), around the belt and the Guide the web along a downward path from the second pulley to the third pulley, and that the third guide device has a fourth pulley (24) which allows the belt and web to run around at least part of the underside of the third pulley (22) wherein a centrifugal force is then exerted in addition to the force of gravity, which accelerates the pressing of the water out of the web when the belts and the web pass around the third pulley (22). - 16 - 109808/02 34 BATH ORIGINAL 5. The device "according to claim 2, ■ characterized, ei without Iv. That oils fourth deflection roller (24) is arranged above the third deflection roller (22) * to the belt (12, 14) and the web (W lead) along a 'castor upwardly directed path from the dritten.Um- (22) to the fourth pulley (24), the force of gravity, a centrifugal force is exerted in this way additionally, accelerates the squeezing out of water from the web when the belts and the web pass around the third pulley (22). 4. Apparatus according to claim 2 or j5> 'marked lohne t that a separator (j55) in the space above the third pulley (22) between the second (2o) and the fourth pulley (24) and below the forming roller (lo) is arranged, to absorb the water that is pressed out of the pulp when the belts (12, 14) around the forming roll walking around. 5. Device according to one of claims 1 to 4, characterized in that below the belt (12, 14) and the web (W) between the second (2o, 22) and the third guide device (24) a suction chamber (38) is arranged, which is at least partially extends below the third guide device (24). 6, device according to one of claims 1 to 5 with a plurality of forming stations which are arranged one behind the other, characterized in that that the first endless Tuohriemen (12) to happen - 17 - 109808/0234 027321 äor third guide device (24) conveys the web (W) arranged on its upper side from one station to the other within the forming stations arranged in series. - 18 - 109808/0234