EP2350385B1 - Formierbereich - Google Patents

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Publication number
EP2350385B1
EP2350385B1 EP09821642.7A EP09821642A EP2350385B1 EP 2350385 B1 EP2350385 B1 EP 2350385B1 EP 09821642 A EP09821642 A EP 09821642A EP 2350385 B1 EP2350385 B1 EP 2350385B1
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EP
European Patent Office
Prior art keywords
dewatering
forming
curvilinear
zone
wire
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EP09821642.7A
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English (en)
French (fr)
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EP2350385A1 (de
EP2350385A4 (de
Inventor
Antti Poikolainen
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Valmet Technologies Oy
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Valmet Technologies Oy
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Publication of EP2350385A4 publication Critical patent/EP2350385A4/de
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    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/48—Suction apparatus
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/36—Guiding mechanisms
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F7/00—Other details of machines for making continuous webs of paper
    • D21F7/005—Wire-tensioning devices
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F9/00—Complete machines for making continuous webs of paper
    • D21F9/003—Complete machines for making continuous webs of paper of the twin-wire type

Definitions

  • the invention relates to a forming section.
  • a fibrous-web machine refers to paper, board, tissue and pulp-drying machines.
  • the task of a forming section is to remove water from fibre suspension fed by the headbox.
  • the consistency of fibre suspension fed onto the forming section is usually 1% and, after the forming section, the consistency of the web formed on the forming section is again 18-20%.
  • the volume for which water can be removed from different stocks for achieving a web of good quality is a function of many factors, such as e.g. a function of the desired basis weight of the web, the design speed of the machine, and the desired level of fines, fibres and fill materials in the finished product.
  • US 6 342 126 B1 describes a forming section, a belt guidance device and a process for forming a fibrous web on the forming section.
  • the forming section comprises two wire loops which form a twin-wire zone and a circling elastic support belt which supports at least one of said two wires in a support zone.
  • Said elastic support belt has been principally led to travel along a path of at least substantially circular shape.
  • Said support zone comprises a support section the average radius of curvature of which is greater than the radius of curvature of the path of the support belt being substantially circular.
  • there are internal support elements by means of which the circling elastic belt is controlled. The support elements are located at a distance from each other in the travel direction of the support belt.
  • the headbox feeds pulp suspension at the beginning of the support section where the wires form a convergent gap.
  • the support section constitutes a forming section curvilinear with a great radius on which pulsating dewatering is applied on the pulp suspension travelling between the wires with dewatering strips.
  • On the outer surface of the support belt there can be grooves or blind bores receiving water.
  • the curvilinear dewatering zones of the forming section are usually formed with a roll, whereby loads applied to the roll set a minimum value for the diameter of the roll.
  • the minimum value of the roll radius again limits the maximum value of dewatering pressure dependent on the roll radius.
  • the only way to increase the dewatering capacity of the roll is to arrange underpressure in the roll by means of which water is sucked within the roll. However, building an underpressure system is expensive and its operation consumes a lot of power.
  • DE 31 42 045 A1 discloses a forming section comprising a first and a second wire loop which form a twin-wire zone.
  • a dewatering device constituted by a roll having a predetermined radius.
  • the forming section comprises a further dewatering device arranged ahead of the twin-wire zone in the pulp moving direction.
  • a web having good quality and strength characteristics can be manufactured on the forming section according to the invention.
  • the forming section comprises a first and a second wire loop which form a twin-wire zone comprising and in which arranged are at least one dewatering element by means of which initial dewatering is performed from pulp suspension fed by the headbox, and at least one dewatering device following said at least one dewatering element in the travel direction of the web which device comprises a stationary support shaft on which are supported support elements at a distance from each other, and an impermeable belt loop which is led to circle around the stationary support shaft supported by said support elements.
  • Said at least one dewatering device further comprises at least one curvilinear dewatering zone which is formed on the path of the belt loop and over which the wires are led to travel supported by the belt loop, whereby the degree of curvature of the curve of said at least one curvilinear dewatering zone increases in the travel direction of the belt such that increasing dewatering pressure is applied to the pulp suspension travelling between the wires in said at least one curvilinear dewatering zone, which increasing dewatering pressure is dependent on the tension of the wires and the radius of curvature of said at least one curvilinear dewatering zone.
  • the surface of the belt loop is advantageously smooth.
  • the dewatering zone having an increasing degree of curvature provides increasing dewatering pressure on the area of the curve, whereby a greater dewatering capacity can be achieved compared to an equivalent dewatering zone having a uniform degree of curvature. It is possible that this arrangement based on increasing compression pressure provides even a 30-% dry content in the web after the wire section. It is then possible to omit power-consuming suction boxes and/or suction rolls from the forming section, whereby the amount of power required in manufacturing the fibrous web will decrease. The power saving thus acquired can be even 1-3 MW.
  • Changing the radius of curvature of the dewatering device can be chosen according to the fibrous web being manufactured. With pulps draining quickly, the radius of curvature of the dewatering device can decrease more rapidly than with pulps draining slower.
  • the location of the dewatering device having a changing radius is after the initial dewatering, in a position in which the fibrous web has already drained and it endures compression.
  • the dry content of the web is over 4% when it arrives at the dewatering device having a changing radius.
  • the first dewatering zone can be formed of a stationary forming shoe in which there are a substantially straight cover and holes extending through the cover.
  • the headbox feeds a pulp suspension jet at the beginning of the first forming shoe.
  • the first forming shoe will not induce pulsating dewatering even when dewatering is intensified with underpressure.
  • the take-off and beading (stock jump) of the pulp jet can be substantially decreased, because the pulp jet lands on the non-pulsating surface having a large open surface.
  • the immediate start of dewatering directly at the impact point damps impact energy.
  • the head of the strip board does not doctor water and does not, for its part, cause stock jump.
  • the direction of the jet is also flexible.
  • the second dewatering zone can be formed of a stationary forming shoe in which there are holes extending through the cover.
  • the cover of the second forming shoe can be at least partially curvilinear but, for other parts, the structure of the forming shoe is equivalent to the structure of the first forming shoe.
  • Fig. 1 shows a schematic side view of a forming section according to the invention.
  • the forming section comprises a first wire loop 11, which circles over a forming roll 12a, and a second wire loop 21, which circles over a first guide roll 22a.
  • the travel direction of the first wire 11 is designated with an arrow S1 and the travel direction of the second wire 21 is designated with an arrow S2.
  • the first wire 11 and the second wire 21 form a convergent gap G such that the wires 11, 21 converge on the area of the forming roll 12a.
  • the headbox 30 feeds a pulp suspension jet to the gap G between the wires 11, 21. After the point of convergence, the wires 11, 21 travel in a specified sector on the outer surface of the forming roll 12a on which is formed a first curvilinear dewatering zone Z1.
  • This first curvilinear dewatering zone Z1 is followed by a substantially straight twin-wire section on which there are two dewatering zones Z2, Z3.
  • the second dewatering zone Z2 is formed of a first suction box 40a provided with a strip cover within the first wire loop 11 and the third dewatering zone Z3 is formed of a second suction box 50a provided with a strip cover within the second wire loop 21.
  • the third dewatering zone Z3 is followed by a fourth dewatering zone Z4 in which the wires 11, 21 travel over a dewatering device 100a provided with a curvilinear control surface.
  • the dry content of the fibrous web W is over 4%, advantageously in the range of 6-12%, on the leading edge of the fourth dewatering zone Z4 on the forming section shown in Fig. 1 .
  • Fig. 2 shows an enlargement of the dewatering device 100a shown in Fig. 1 , which comprises a stationary shaft 110 around which is arranged a circling belt 120.
  • the circling belt 120 forms a moving curvilinear surface.
  • the shaft 110 advantageously consists of a hollow piece rectangular of its cross section on the outer surface of which are supported support elements 111, 112, 113, 114 which form the path of the belt loop 120.
  • the path of the belt loop 120 forms a substantially elliptical path in which there is at least one curvilinear section E1 differing from the elliptical shape.
  • the degree of curvature of the curve of the curvilinear section E1 differing from the elliptical shape increases progressively in the travel direction of the belt loop 120.
  • the curvilinear section E1 consists of a large number of short partial curves such that the length of a radius R1, R2 of the partial curves decreases progressively in the travel direction of the belt 120, whereby the degree of curvature of the curve increases progressively.
  • the stationary, hollow shaft 110 of the dewatering device 100a shown in Fig. 2 simultaneously operates as a lubricant container from which a first lubricating pump B pumps lubricant V into a space between the circling transfer belt 120 and the support element 111.
  • the dewatering device 100 further comprises a doctor blade K by means of which the lubricant V carried along by the transfer belt 120 is led back to the lubricant container. Because the dewatering device 100a is in the lower position, a second lubricant pump C is yet required by means of which the lubricant V collected by the doctor blade K is pumped into the hollow shaft 110 operating as the lubricant container.
  • the belt loop 120 used in the dewatering device 100a is a smooth-surfaced, impermeable belt in which there can be grooves or blind bores receiving water.
  • the surface of the belt loop 120 is designed such that it will not cause marking in the fibrous web W even at high compression pressures. Then, the degree of openness of the surface of the belt loop 120 is small and water exits the fibrous web mainly through the external forming wire 11, 21.
  • the dewatering device 100a provides dewatering pressure increasing in the travel direction of the fibrous web W, whereby water also exits the fibrous web W at the end of the dewatering device 100a.
  • Fig. 3 shows a schematic side view of a second forming section according to the invention.
  • the first wire 11 is led to travel over a first breast roll 12, the second wire 21 is led to travel over a second breast roll 22.
  • the wires 11, 21 form on the section after the breast rolls 12, 22 a convergent gap G and a twin-wire zone following it.
  • a first dewatering zone Z10 which consists of a first stationary, non-pulsating forming shoe 40.
  • the headbox 30 feeds a pulp suspension jet to the gap G, on top of the first wire 11, at the beginning of the first forming shoe 40.
  • a second dewatering zone Z20 which consists of a second stationary, non-pulsating forming shoe 50.
  • the first wire 11 and the second wire 21 travel over a third dewatering zone Z30 which consists of a first dewatering device 100b having a curvilinear surface.
  • the third dewatering zone Z30 is followed by a straight twin-wire section directing obliquely downwards which is followed by a fourth dewatering zone Z40 which consists of a second dewatering device 100a having a curvilinear surface.
  • the second wire 21 is led to the return cycle, whereby the web W follows on the upper surface of the first wire 11, on a section directing obliquely upwards to a pick-up point P in which the web W is transferred onto the pick-up fabric 31 of the press section.
  • dewatering becomes symmetrical when the first dewatering device 100b removes water from the pulp suspension travelling between the wires 11, 21 through the second wire 21 and the second dewatering device 100a removes water from the pulp suspension travelling between the wires 11, 21 through the first wire 11.
  • Fig. 4 shows an enlargement of the beginning of the forming section shown in Fig. 3 .
  • the first forming shoe 40 there are a leading edge 43 and a trailing edge 44 as well as a cover 41 provided with holes 42, which cover comes against the inner surface of the first wire 11.
  • the first forming shoe 40 is advantageously connected with a source of underpressure (not shown in the figure), whereby an underpressure effect is applied to the web via the holes 42 in the cover 41 of the first forming shoe 40.
  • the cover 42 of the first forming shoe 40 is advantageously straight at least on the section between the impact point of the pulp suspension jet fed by the headbox 30 and the trailing edge 44 of the cover 42.
  • the first forming shoe 40 induces non-pulsating dewatering in the stock travelling on top of the first wire 11. With the first forming shoe 40, a lot of water can be removed from the stock.
  • the open surface defined by the holes 42 of the cover 41 of the forming shoe 40 is 30-90%, advantageously 40-70% of the section with holes 42 between the leading edge 43 of the cover 41 and the trailing edge 44 of the cover 41.
  • the structure of the second forming shoe 50 is equivalent to the structure of the first forming shoe 40.
  • the second forming shoe 50 there are a leading edge 53 and a trailing edge 54 as well as a cover 51 provided with holes 52, which cover comes against the inner surface of the second wire 21.
  • the second forming shoe 50 is advantageously connected to a source of underpressure (not shown in the figure), whereby an underpressure effect is applied to the web via the holes 52 in the cover 51 of the second forming shoe 50.
  • the first part of the cover 51 of the second forming shoe 50 is straight and the end is gently curvilinear.
  • the second forming shoe 50 induces non-pulsating dewatering in the stock travelling between the first wire 11 and the second wire 21.
  • the open surface defined by the holes 52 of the cover 51 of the forming shoe 50 is 30-90%, advantageously 40-70% of the section with holes 52 between the leading edge 53 of the cover 51 and the trailing edge 54 of the cover 51.
  • the offset H is advantageously 0-200 mm, whereby the section with holes 52 of the second forming shoe 50 starts at the point where the section with holes 42 of the first forming shoe 40 ends.
  • the sections with holes 42, 52 can also go slightly on top of each other.
  • the first wire 11 and the second wire 21 do not advantageously converge on the surface of the cover 51 of the second forming shoe 50 until after the offset H.
  • the first wire 11 and the second wire 21 travel over the third dewatering zone Z30 which consists of the first dewatering device 100b having a curvilinear surface.
  • the first dewatering device 100b is in the upper position, but its structure is in principle equivalent to the structure of the dewatering device 100a shown in Fig. 1 being in the lower position.
  • the first dewatering device 100b thus comprises the stationary shaft 110 around which is arranged the circling belt 120.
  • the circling belt 120 forms a moving curvilinear surface.
  • the surface of the circling belt 120 is impermeable and its surface is advantageously smooth or grooved.
  • the shaft 110 advantageously consists of a hollow piece rectangular of its cross section on the outer surface of which are supported support elements 111, 112, 113, 114 which form the path of the belt loop 120.
  • the path of the belt loop 120 forms a substantially elliptical path in which there is at least one curvilinear section E1 differing from the elliptical shape.
  • the degree of curvature of the curve of the curvilinear section E1 differing from the elliptical shape increases progressively in the travel direction of the belt loop 120.
  • the curvilinear section E1 consists of a large number of short partial curves such that the length of the radius R1, R2 of the partial curves decreases progressively in the travel direction of the belt 120, whereby the degree of curvature of the curve increases progressively.
  • the first dewatering device 100b provides dewatering pressure increasing in the travel direction of the fibrous web W, whereby water also exits the fibrous web W at the end of the dewatering device 100b.
  • the forming wires 11,21 are led to travel over the curvilinear section E1 in question on the outer surface of the belt 120.
  • Dewatering pressure is applied to the stock travelling between the forming wires 11, 21 on said curvilinear section E1 the magnitude of which pressure is dependent on the ratio of a tension T of the wires 11, 21 and a radius R1, R2 of the curvilinear section of the path of the wires 11, 21, T/(R1, R2).
  • the radius R1, R2 of the curvilinear section E1 decreases progressively, progressively increasing dewatering pressure is applied to the stock travelling between the wires 11, 21.
  • the dewatering pressure increases tenfold, e.g. from the value of 10 kPa to the value of 100 kPa.
  • the dewatering pressure removes water mainly through the second forming wire 21.
  • the stationary, hollow shaft 110 of the dewatering device 100 simultaneously operates as the lubricant container from which the first lubricating pump B pumps lubricant V into the space between the circling transfer belt 120 and the support element 111.
  • the dewatering device 100 further comprises the doctor blade K by means of which the lubricant V carried along by the transfer belt 120 is led back to the lubricant container.
  • the second dewatering device 100a shown in Fig. 4 is totally equivalent to the dewatering device 100a shown in Fig. 1 .
  • Fig. 5 shows a schematic side view of a third forming section according to the invention.
  • the figure shows the beginning of the forming section and it is totally equivalent to the situation shown in Fig. 4 with the difference that the second wire loop 21 is here diverged to the return cycle with a drawing roll 24 immediately after the first dewatering device 100b.
  • this embodiment includes only the first dewatering device 100b and the second dewatering device 100a has been omitted.
  • This embodiment is thus a modification of the forming section shown in Fig. 3 .
  • the dewatering device 100a being farther behind in the travel direction of the web W is replaced by the drawing roll 24, whereby only one dewatering device 100b provided with a changing radius of curvature is in use.
  • the drawing roll 24 By setting the drawing roll 24 in this position, the tension of the wire is maximised at the point of the first dewatering device 100b and high dewatering pressure is achieved.
  • the configuration of the forming section can be whichever after the first dewatering device 100b.
  • the embodiment shown in both Fig. 1 and Fig. 3 employs the dewatering device 100a, 100b provided with a changing radius of curvature on the twin-wire section immediately after the dewatering elements 40, 50, 40a, 50a performing initial dewatering.
  • the dewatering device 100a provided with a changing radius of curvature is used and, in Fig. 3 , two successive dewatering devices 100b, 100a provided with a changing radius of curvature are used.
  • the curvilinear section E1 of the support element 111 of the dewatering device 100a, 100b can consist of two partial curves, whereby the radius of curvature R1 of the partial curve first in the travel direction of the web is greater than the radius of curvature R2 of the partial curve second in the travel direction of the web.
  • the curvilinear section E1 of the support element 111 can consist of three or more partial curves, whereby the radius of curvature of the partial curve next in the travel direction of the web is always smaller than the radius of curvature of the partial curve preceding it.

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Claims (9)

  1. Formsektion mit einer ersten (11) und einer zweiten (21) Siebschleife, die eine Doppelsiebzone bilden, die mindestens ein Entwässerungselement (12a, 50), anhand dessen eine anfängliche Entwässerung von einer Stoffsuspension, die durch den Stoffauflauf (30) gefördert wird, durchgeführt wird, und mindestens eine Entwässerungsvorrichtung (100a, 100b), die dem mindestens einen Entwässerungselement (12a, 50) in der Laufrichtung der Bahn folgt, aufweist und wobei diese in der Doppelsiebzone angeordnet sind, wobei die Entwässerungsvorrichtung (100a, 100b) eine stationäre Stützwelle (110), an der Stützelemente (111, 112, 113, 114) in einem Abstand voneinander abgestützt sind, eine undurchlässige Bandschleife (120) aufweist, die im Kreis um die stationäre Stützwelle (110) geführt ist und durch die Stützelemente (111, 112, 113, 114) gestützt ist, wobei die mindestens eine Entwässerungsvorrichtung (100a, 100b) des Weiteren mindestens eine kurvenförmige Entwässerungszone (Z4, Z30) aufweist, über die die Siebe (11, 21) geführt sind, um gestützt durch die Bandschleife (120) darüber zu laufen, wobei sich der Grad der Krümmung der Kurve der mindestens einen kurvenförmigen Entwässerungszone (Z4, Z30) in der Laufrichtung des Bands (120) derart erhöht, dass ein sich erhöhender Entwässerungsdruck auf die Stoffsuspension, die zwischen den Sieben (11, 21) läuft, an der mindestens einen Entwässerungszone (Z4, Z30) aufgebracht wird, wobei der sich erhöhende Entwässerungsdruck von einer Spannung (T) der Siebe (11, 21) und einem Krümmungsradius (R1, R2) der mindestens einen kurvenförmigen Entwässerungszone (Z4, Z30) abhängig ist,
    dadurch gekennzeichnet, dass
    der mindestens einen kurvenförmigen Entwässerungszone (Z4, Z30) zwei Entwässerungszonen (Z2, Z3; Z10, Z20), die in entgegengesetzten Richtungen angeordnet sind, voranstehen.
  2. Formsektion gemäß Anspruch 1, dadurch gekennzeichnet, dass die mindestens eine kurvenförmige Entwässerungszone (Z4, Z30) der mindestens einen Entwässerungsvorrichtung (100, 200) aus zwei Teilkurven besteht, derart, dass der Krümmungsradius (R1) einer ersten Teilkurve größer als der Krümmungsradius (R2) einer zweiten Teilkurve, die der ersten Teilkurve in der Laufrichtung der Bahn folgt, ist.
  3. Formsektion gemäß Anspruch 1, dadurch gekennzeichnet, dass die mindestens eine kurvenförmige Entwässerungszone (Z4, Z30) der mindestens einen Entwässerungsvorrichtung (100, 200) aus drei oder mehr Teilkurven besteht, derart, dass der Krümmungsradius einer jeden Teilkurve, die in Laufrichtung der Bahn voransteht, größer als der Krümmungsradius der Teilkurve ist, die dieser folgt.
  4. Formsektion gemäß einem der Ansprüche 1-3, dadurch gekennzeichnet, dass die stationäre Welle (110) der mindestens einen Entwässerungsvorrichtung (100, 200) aus einem Hohlstück, das rechteckig in seinem Querschnitt ist, besteht, dessen Innenteil einen Schmierstoffbehälter bildet, von dem Schmierstoff (V) mit einer ersten Pumpe (B) zwischen das Stützelement (111) und die Bandschleife (120), die die mindestens eine kurvenförmige Entwässerungszone (Z4, Z30) bilden, zur Schmierung der Bandschleife (120) gepumpt wird.
  5. Formsektion gemäß einem der Ansprüche 1-4, dadurch gekennzeichnet, dass die Entwässerungszonen (Z10, Z20), die in entgegengesetzten Richtungen angeordnet sind, aus einem ersten nicht-pulsierenden Formschuh (40), der innerhalb der ersten Siebschleife (11) installiert ist und in dem es eine Abdeckung (41) gibt, die mit Durchgangslöchern (42) versehen ist, auf die der Stoffauflauf (30) einen Stoffsuspensionsstrahl fördert, und einem zweiten nicht-pulsierenden Formschuh (50) bestehen, der innerhalb der zweiten Siebschleife (21) installiert ist und in dem es eine Abdeckung (51) gibt, die mit Durchgangslöchern (52) versehen ist, wobei die Siebe (11, 21) in dem Bereich des zweiten Formschuhs (50) konvergieren.
  6. Formsektion gemäß Anspruch 5, dadurch gekennzeichnet, dass zwischen dem ersten Formschuh (40) und dem zweiten Formschuh (50) ein Versatz (H) ist.
  7. Formsektion gemäß Anspruch 5 oder 6, dadurch gekennzeichnet, dass die offene Fläche, die durch die Löcher (42) der Abdeckung (41) des ersten Formschuhs (40) festgelegt ist, 40-90% des Bereichs mit Löchern (42) der Abdeckung (41) ist.
  8. Formsektion gemäß einem der Ansprüche 5-7, dadurch gekennzeichnet, dass die offene Fläche, die durch die Löcher (52) der Abdeckung (51) des zweiten Formschuhs (50) festgelegt ist, 40-90% des Bereichs mit Löchern (52) der Abdeckung (51) ist.
  9. Formsektion gemäß einem der Ansprüche 1-4, dadurch gekennzeichnet, dass die Entwässerungszonen (Z2, Z3), die in entgegengesetzten Richtungen vorliegen, aus einem ersten mit Leisten bedeckten Saugkasten (40a), der innerhalb der ersten Siebschleife (11) installiert ist, und einem zweiten mit Leisten bedeckten Saugkasten (50a), der innerhalb der zweiten Siebschleife (21) installiert ist, besteht, denen eine Entwässerungszone (Z1), die an einer Formwalze (22a) innerhalb der zweiten Siebschleife (21) gebildet ist, voransteht.
EP09821642.7A 2008-10-24 2009-10-12 Formierbereich Active EP2350385B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI20086008A FI120880B (fi) 2008-10-24 2008-10-24 Muodostusosa
PCT/FI2009/050814 WO2010046527A1 (en) 2008-10-24 2009-10-12 Forming section

Publications (3)

Publication Number Publication Date
EP2350385A1 EP2350385A1 (de) 2011-08-03
EP2350385A4 EP2350385A4 (de) 2012-05-02
EP2350385B1 true EP2350385B1 (de) 2015-09-30

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EP09821642.7A Active EP2350385B1 (de) 2008-10-24 2009-10-12 Formierbereich

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EP (1) EP2350385B1 (de)
CN (1) CN102197177B (de)
FI (1) FI120880B (de)
WO (1) WO2010046527A1 (de)

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EP3913136A1 (de) 2020-05-20 2021-11-24 Valmet Technologies Oy Bandwalze
EP3913133A1 (de) * 2020-05-20 2021-11-24 Valmet Technologies Oy Bandwalze für eine siebpartie einer maschine zur herstellung einer faserstoffbahn
EP3913134A1 (de) 2020-05-20 2021-11-24 Valmet Technologies Oy Bandwalze
DE102021113491A1 (de) 2020-05-28 2021-12-02 Valmet Technologies Oy Formierpartie einer Faserbahn-Herstellungslinie
EP4006230A1 (de) 2020-11-30 2022-06-01 Valmet Technologies Oy Verfahren zur herstellung einer faserbahn und ein formabschnitt zur herstellung einer faserbahn

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SE539956C2 (en) 2016-11-28 2018-02-13 Valmet Oy A forming section for forming a fibrous web, a papermaking machine comprising a forming section and a method of forming a fibrous web
EP3333314A1 (de) 2016-12-08 2018-06-13 Valmet Technologies Oy Formiereinheit
FI11620U1 (fi) 2016-12-08 2017-04-12 Valmet Technologies Oy Viiraosa, erityisesti modernisoitu viiraosa
EP3333315B1 (de) 2016-12-08 2019-05-01 Valmet Technologies Oy Blattbildungspartie
EP3382094B1 (de) * 2017-03-31 2023-09-06 Valmet Technologies Oy Blattbildungspartie zur herstellung einer mehrlagigen faserstoffbahn und verfahren zur herstellung einer mehrlagigen faserstoffbahn
WO2019043608A1 (en) * 2017-09-01 2019-03-07 Stora Enso Oyj PROCESS FOR PRODUCING CARTON, CARDBOARD, AND CORRUGATED CARDBOARD
EP3913137A1 (de) 2020-05-20 2021-11-24 Valmet Technologies Oy Vorrichtung zum umlenken einer faserstoffbahn in einer formierpartie einer maschine zur herstellung einer faserstoffbahn

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DE3142045A1 (de) * 1981-10-23 1983-05-11 J.M. Voith Gmbh, 7920 Heidenheim Former zur bildung einer papierbahn
FI980743A (fi) * 1998-04-01 1999-10-02 Valmet Corp Paperikoneen kita-telaformeri
FI114812B (fi) * 1998-09-14 2004-12-31 Metso Paper Inc Menetelmä ja laite kuitumassaseoksen pesemiseksi
DE19902274A1 (de) * 1999-01-21 2000-07-27 Voith Sulzer Papiertech Patent Siebpartie sowie Bandführungseinrichtung für eine solche Siebpartie
CA2489659C (en) * 2002-08-23 2010-02-16 Metso Paper, Inc. Forming of a paper or board web in a twin-wire former or in a twin-wire section of a former

Cited By (6)

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Publication number Priority date Publication date Assignee Title
EP3913135A1 (de) 2020-05-20 2021-11-24 Valmet Technologies Oy Achsträger für eine walze einer maschine zur herstellung einer faserstoffbahn
EP3913136A1 (de) 2020-05-20 2021-11-24 Valmet Technologies Oy Bandwalze
EP3913133A1 (de) * 2020-05-20 2021-11-24 Valmet Technologies Oy Bandwalze für eine siebpartie einer maschine zur herstellung einer faserstoffbahn
EP3913134A1 (de) 2020-05-20 2021-11-24 Valmet Technologies Oy Bandwalze
DE102021113491A1 (de) 2020-05-28 2021-12-02 Valmet Technologies Oy Formierpartie einer Faserbahn-Herstellungslinie
EP4006230A1 (de) 2020-11-30 2022-06-01 Valmet Technologies Oy Verfahren zur herstellung einer faserbahn und ein formabschnitt zur herstellung einer faserbahn

Also Published As

Publication number Publication date
CN102197177A (zh) 2011-09-21
EP2350385A1 (de) 2011-08-03
WO2010046527A1 (en) 2010-04-29
CN102197177B (zh) 2013-01-16
EP2350385A4 (de) 2012-05-02
FI20086008A0 (fi) 2008-10-24
FI120880B (fi) 2010-04-15

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