EP0854229B1 - Machine pour la fabrication d'une bande fibreuse - Google Patents

Machine pour la fabrication d'une bande fibreuse Download PDF

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Publication number
EP0854229B1
EP0854229B1 EP97119305A EP97119305A EP0854229B1 EP 0854229 B1 EP0854229 B1 EP 0854229B1 EP 97119305 A EP97119305 A EP 97119305A EP 97119305 A EP97119305 A EP 97119305A EP 0854229 B1 EP0854229 B1 EP 0854229B1
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EP
European Patent Office
Prior art keywords
press
machine according
felt
roll
main
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP97119305A
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German (de)
English (en)
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EP0854229A3 (fr
EP0854229A2 (fr
Inventor
Christian Schiel
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Voith Patent GmbH
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Voith Paper Patent GmbH
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Publication date
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Publication of EP0854229A2 publication Critical patent/EP0854229A2/fr
Publication of EP0854229A3 publication Critical patent/EP0854229A3/fr
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Publication of EP0854229B1 publication Critical patent/EP0854229B1/fr
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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F3/00—Press section of machines for making continuous webs of paper
    • D21F3/02—Wet presses
    • D21F3/0209—Wet presses with extended press nip
    • D21F3/0218—Shoe presses
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F11/00—Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines
    • D21F11/14—Making cellulose wadding, filter or blotting paper
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F3/00—Press section of machines for making continuous webs of paper
    • D21F3/02—Wet presses
    • D21F3/0209—Wet presses with extended press nip
    • D21F3/0218—Shoe presses
    • D21F3/0227—Belts or sleeves therefor
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F3/00—Press section of machines for making continuous webs of paper
    • D21F3/02—Wet presses
    • D21F3/04—Arrangements thereof
    • D21F3/045—Arrangements thereof including at least one extended press nip

Definitions

  • the invention relates to a machine for producing a fibrous web, in particular tissue or tissue paper web, with at least one as Shoe press trained pre-press, one by a pressure roller and one Main cylinder formed drying cylinder, one through the press nips of the pre-press and the main press passed endless top belt and one over a lower roll of the pre-press guided bottom felt, the preformed in a former web through the upper belt is fed first to the pre-press and then to the main press and the shoe press, one extended in the direction of web travel
  • Prepress having a press nip an upper shoe press unit and one of these opposite lower roller comprises.
  • an upper band takes the Paper web from a former to it through a pre-press between a top roller and a bottom roller with bottom felt through to one Lead the main press between a pressure roller and a drying cylinder.
  • the pressure roller is a Shoe press.
  • the blind holes or grooves in the surface of the press casing can be due to Because of the limited depth due to the manufacturing process, not all of the water is produced take up. This should be one of the reasons why most of those in DE-A-42 24 730 described embodiments two pre-presses and in one case in addition, a suction pressure roller is provided in the main press.
  • the known ones Embodiments of the two-felt machine thus take up a relatively large amount of space, especially since in the above cases, two pre-presses and a main press are provided, which no water removed from the crepe cylinder.
  • the aim of the invention is, inter alia, a machine of the beginning to create the type mentioned, in which the aforementioned disadvantages are eliminated, the with a simple, compact design with the lowest possible line forces, especially after the delivery of the web to the drying cylinder, a relative ensures high web dry content and with the use of any Suction press rollers become unnecessary.
  • the machine according to the invention is also extreme uncomplicated and compact as well as with regard to the after delivery of the paper web to Dryer cylinders reached web dry content extremely efficiently, which means that achieved maximum dryness of the web with the lowest possible line forces becomes.
  • the elimination of suction press rolls is also essential, which means that at the same time The need to apply the power for vacuum generation is eliminated is significantly higher than the mechanical drive power in question.
  • the diameter of the drying cylinder is relatively small being held.
  • the machine according to the invention is also able to as required to influence the quality with different intensities of the Press one or both presses to work.
  • the idea underlying the invention is that the large ones Amounts of water that occur in a single pre-press, even without the vacuum a suction press roll can be managed and that, moreover, a high
  • the final dry matter content of the web after the main pressing point can be reached if the Prepress is a shoe press with an extended press nip, the top roller is one Shoe press roll with a smooth press jacket, the bottom roll is a grooved roll grooves are deep enough, the upper felt is dense but still water permeable is that when pressed against the drying cylinder still more water from the Paper web can be removed, and the pressure roller of the main press one perforated and / or grooved surface for absorbing squeezed water having.
  • the shoe press unit is the Prepress a shoe press roll and the associated smooth press belt a smoother one Press jacket, which is closed at the ends by rotating lid.
  • the pressure roller of the main press can be one with an elastic rubber cover provided conventional roller. However, this pressure roller is preferred a shoe press roll provided with a flexible roll jacket.
  • the jacket of the pressure roller with blind bores is provided.
  • the jacket of this pressure roller when new have drilled area, which is about 20 to about 35% of the total surface is.
  • the hole diameter when the jacket is new is advantageously in a range of about 2 to about 3 mm.
  • the hole depth can be new when the Jacket lie in a range of preferably about 1.5 to about 3 mm.
  • the line force can be higher than in a conventional press roll, the Pressure drop at the end of the press nip is preferably steeper. So that is ensures that the paper web in the main press to a relatively high Final dryness can be brought. But it is also possible to change the line quality of both presses should be set as high as possible, e.g. low line forces for voluminous better qualities and higher line forces for Mass products. Such adjustment is in the previous versions with conventional rollers are not possible because they only work with a certain line force fit exactly together.
  • the top felt starts directly from the pre-press, i.e. in particular without an intermediate deflection roller to the one designed as a shoe roller Pressure roller of the main press is guided and this over a larger sector wraps around the press zone. So far with such a guide roller avoided associated problems, which consisted of correspondingly much Space on the drying cylinder circumference was needed, especially for the Hot air hood was lost, increasing the production capacity of the machine was reduced.
  • the space required is created by the upper felt pressing the shoe pressure roller the main press wraps around more than 45 °.
  • the soft press jacket can be supported from the inside.
  • the corresponding support can done by one or more sliding shoes. However, this would be with one additional higher drive power.
  • the press jacket formed as a shoe press roll Pressure roller at least in the area wrapped by the top felt by in Circumferential circumferential direction arranged small support or Segment rollers is supported on a penetrating the press jacket fixed crosshead are stored.
  • the diameter of the backup rolls can be, for example, in a range of approximately 60 up to about 120 mm.
  • These back-up rolls are those that extend transversely to the web running direction Machine width preferably carried out in several parts.
  • the relationship between the mutual distance between the bearings of a respective partial support roller and the roller diameter suitably in a range from about 7.5 to about 15, this ratio preferably being 12.
  • the distance this bearing in particular also less than the length of a respective one Partial support roller.
  • the unsupported area between the ends of the partial support rollers respective row of rolls extending in the direction of the machine width a maximum of about 10 to about 25 mm. This is not critical after the Rigidity of the press sleeves bent in the running direction in the transverse direction as a rule is large enough to bridge this gap without any significant sag.
  • the angular distance between the in Circumferential direction of successive backup rolls in a range of about 7.5 to about 15 degrees.
  • the bottom felt in a preferred embodiment in practice generally along the bottom roll of the pre-press at the end point of the assigned press nip touching tangent from the lower press roll led away, the maximum directional deviation from this tangent expediently lies in a range from approximately -2 degrees to approximately +4 degrees. Larger deviations are unfavorable, as there is a larger negative Deviation to rewetting of the bottom felt by the water in the Grooving of the lower roller and in the event of a larger positive deviation from one Remoistening of the paper web can come through the bottom felt.
  • the upper felt and the fibrous web on the press jacket in the convex region of the press shoe wrap around the outlet side with a correspondingly large angle.
  • the opening angle provided immediately behind the press nip of the pre-press between the upper felt carrying the fibrous web and the lower felt preferably in a range from about 4 to about 15 degrees.
  • the line force generated in the press nip of the pre-press advantageously lies in a range from about 60 to about 300 kN / m, while in the direction of web travel considered press nip length preferably a value in the range of about 80 to about 200 mm.
  • the pressure generated in this press nip of the pre-press rises Web running direction up to a maximum pressure of preferably about 1.5 to about 4 Pa progressively to then drop steeply.
  • the maximum line force generated in the press nip of the main press preferably in one Range from about 100 to about 200 kN / m.
  • the length measured in the direction of web travel the press nip advantageously has a value in the range of about 50 to about 120 mm.
  • the pressure generated in the press nip increases in the direction of web travel preferably at first relatively slowly, then relatively quickly drop. It is particularly advantageous if the one produced in this press nip Maximum pressure is in a range from about 2.5 to about 5 MPa when high Production performance is aimed for.
  • the maximum pressures in the two presses and the structure of the grooves or Blind holes in the surface of the press jacket of the main press can be so be coordinated so that a maximum dryness after Main press sets in the fibrous web, with the longest possible service life of the two felts is taken into account.
  • the higher the line force and the maximum pressure in the preliminary press the less water remains in the upper felt. So that in the main press amount of water is small, so that to drain off the upper felt no longer requires large flow cross sections.
  • the top felt can get a fine and dense structure. Such a felt is more uniform Pressure on the fibrous web and reduces the rewetting to the Fibrous web at the end of the press nip.
  • the maximum pressure generated in the press nip of the main press is advantageous higher than that in the nip of the pre-press.
  • the water permeability of the Upper felt is advantageously at most 1/3, preferably at most 1/4 of of the bottom felt.
  • the water permeability of the top felt is still so large that there is an increase in dry matter in the main press Fibrous web of more than 2% results and / or the water permeability of the upper felt chosen so that after the main press a final dry content of Fiber web of over 42% results.
  • the surface of the Press sleeve of the pressure roller with both blind holes and grooves be provided.
  • the sum of the areas of the area provided with blind holes and grooves Press cover of the pressure roller in the new state of the press cover is preferably about 25 to about 40% of the total surface.
  • the depth of the grooves is expediently about 1/10 to about 1/3 of the depth of the Blind holes.
  • the width of the grooves is advantageously in a range from about 0.3 to 0.6 mm.
  • the Groove cut the blind holes in the center of every second row of blind holes and in the middle between the blind holes of the rows in between pass.
  • the Grooves run in the middle between two adjacent rows of blind holes and do not cut blind holes.
  • a drip pan or gutter to catch the water thrown out of the grooves of the lower roller be provided.
  • a water scraper with a non-positive at the Pressing jacket can be assigned to a water squeegee.
  • means for cleaning the upper felt after the Displacement principle should be provided to clear, largely free of dirt particles Spray water on the inside of the upper felt, which is then in the Prepress is pressed through the top felt and the fibrous web into the bottom felt. This can penetrate, for example, from the paper side Dirt particles are removed. It is also of particular advantage if funds for a correction of the web moisture over the machine width is provided to the Amount of wash water can vary across the machine width. Doing so usually on strips that are too dry in paper with an increased Wash water addition reacts.
  • Spray pipes with water outlet adjustable over the machine width are provided with which different felt temperatures can be set. This happens in usually in such a way that too wet streaks in the paper by adding water compensated for increased temperature in the corresponding zones of the upper felt become.
  • the embodiment of a hygiene paper machine shown in FIG. 1 comprises first a headbox 10, a top felt 12 and a sheet forming screen 14, the together with the top felt 12 spanned a forming roller 16 and the Headbox 10 coming fiber suspension dewatered.
  • the sheet forming screen 14 runs tensioned in the longitudinal direction over screen guide rollers 22.
  • the upper felt 12 runs over a felt guide roller 24 to a pre-press 26 and over a Pressure roller 28 of a main press 30 to a regulating roller 32, a tension roller 34 and via a felt guide roller 36 back to the forming roller 16.
  • the pre-press 26 consists of a grooved lower roller 38 and an upper one Shoe press roll 40 with a press shoe 42, through which a smooth impermeable flexible press jacket 44 against the upper felt 12 and the grooved lower roller 38 is pressable.
  • a bottom felt 50 also runs through the press nip 48 under the paper web 46. This underfelt 50 is under tension in its path by guide rollers 52 guided.
  • a pipe suction device 54 and a spray tube 56 is provided.
  • One or more spray tubes 58 are used to clean the upper felt 12 Loop of the upper felt 12 are arranged.
  • the paper web 46 After passing through the pre-press 26, the paper web 46 is also removed pressure roller 28 designed as a shoe pressure roller to a drying cylinder 60 pressed, which forms a main press 30 together with the pressure roller 28.
  • the Paper web 46 adheres to the drying cylinder 60, after drying to be scraped off by a crepe scraper 62.
  • the forming roller 16, the lower roller 38 and the drying cylinder 60 are in Drivable arrow direction.
  • a channel 64 is provided in water.
  • the water thrown off the lower roller 38 is in a trough 66 caught and led out of the side of the hygiene paper machine.
  • FIG. 2 shows a partial view of the grooved lower roller 38 of the pre-press 26 and one Partial section through the upper shoe press roll 40 with the press jacket 44, in which the Press shoe 42 cannot be pressed radially downwards by a pressure piston 68 crosshead shown is held.
  • the facing of the press jacket 44 sliding surface of the press shoe 42 is in following case hydrodynamically by drawing an oil film between the Press shoe 42 and the press jacket 44 lubricated. Lubrication can also be done through the supply of pressure oil can be supplemented by openings 70 in the sliding surface.
  • the press jacket 44 has both a smooth inner surface and a smooth one Outer surface.
  • the upper felt 12 and the carried paper web 46 and the lower felt 50 run from left to right through the nip 48 of the pre-press 26. Behind the nip 48 the pre-press 26 runs the top felt 12 with the paper web 46 curved upwards to then continue to the next roller.
  • the angle ⁇ between a tangent 72 to the lower roller 38 at the end of Press nip 48 of the pre-press 26 and the approximately straight course of the upper felt 12 is chosen so large that ambient air easily in the gusset between the Upper felt 12 and the lower felt 50 can penetrate when the lower felt 50 along the Tangent 72 runs from the lower roller 38 or by a small angle ⁇ of deviates a few degrees from the direction of the tangent 72.
  • Figure 3 shows a sectional view of an embodiment of one of the Main press 30 assigned to the press roll 28, which is designed as a shoe press roll with a fixed crosshead 74, which is provided with an inner bore 76, are led through the supply lines, not shown.
  • a press jacket 84 made of elastic plastic is rotatable support or Segment rollers 86 supported. These support rollers or rollers 86 are over the Machine width formed in several parts and at the ends or in the Spaces between adjacent partial support rollers with bearing blocks 88 attached to the crosshead 74.
  • the upper felt 12 and the paper web 46 carried with it run on the bottom of the Scope of the pressure roller 28. After passing through the press nip 90 the The main press 30 runs the top felt 12 approximately tangentially to the drying cylinder 60 End of the press nip 90 continues while the paper web 46 on the drying cylinder 60 liable to be transported.
  • FIG. 1 An embodiment of an alternative to that of FIG. 1 is not shown Sanitary paper machine, the same parts being the same for each other Reference numerals are provided.
  • the paper web 46 is on a forming or Sheet forming screen 14, which is stretched over screen guide rollers 22, to a Pick roller pressed. Then it runs on the underside of the top felt 12 further to the right via a felt guide roller 24 through the pre-press 26 and around Pressure roller 28 of the main press 30.
  • the paper web 46 is then to the Transfer drying cylinder 60, from which it is finally passed through a crepe scraper 62 being creped.
  • the upper felt 12 runs over a regulating roller 32, a guide roller and one Tension roller 34 back to the take-off roller.
  • the pre-press 26 consists of an upper shoe press roll 40 with a press shoe 42 and a press jacket 44 which is smooth both inside and outside.
  • an underfelt 50 is passed through the press nip 48 of the pre-press 26, the runs back over guide rollers.
  • a scraper can be used to guide the outer roller against the bottom felt 50 Keep the surface clean. Spray pipes and a Pipe suction devices keep the bottom felt 50 clean.
  • the paper web 46 from the top felt 12 passed to the periphery of the drying cylinder 60 to after drying to be creped by the creping scraper 62.
  • the pressure roller 28 of the main press 30 can be a water scraper with a non-positively assigned to their press jacket 84 water squeegee his.
  • Spray pipes have different functions, such as the count the following:
  • the outer surface of a press shell 84 associated with the main press 30 Pressure roller 28 can be designed as follows:
  • This surface contains blind bores which are approximately equidistant from one another and these connecting grooves.
  • the grooves are arranged so that they always run right through the blind holes of every second line and thus the surface parts furthest away from the blind holes broach.
  • the grooves serve as drainage channels to the blind bores, which in turn lead to temporary water storage in the nip 90 of the main press 30 are provided.
  • the grooves have a smaller depth than the blind bores.
  • blind holes and grooves can make the grooves parallel to the rows of holes run in the space.

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  • Paper (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)

Claims (38)

  1. Machine pour la fabrication d'une bande fibreuse (46), en particulier d'une bande de tissu ouaté ou de papier hygiénique, avec au moins une presse préliminaire (26) ayant la forme d'un patin de pressage, une presse principale (30) formée d'un rouleau de pressage (28) et d'un cylindre de séchage (60), d'une bande supérieure sans fin (12) menée à travers la fente de pressage (48, 90) de la presse préliminaire (26) et de la presse principale (30) et d'un feutre inférieur (50) mené sur un rouleau inférieur (38) de la presse préliminaire (26), dans laquelle la bande fibreuse (46) préformée dans un moule est transmise par la bande supérieure (12) d'abord à la presse préliminaire (26) et ensuite à la presse principale (30), et la presse préliminaire (26) ayant la forme d'un patin de pressage et présentant une fente de pressage (48) allongée dans le sens de circulation de la bande comprend une unité de patin de pressage supérieure (40) et un rouleau inférieur (38) opposé à celle-ci, caractérisée en ce que l'unité de patin de pressage supérieure (40) est pourvue d'une bande de pressage souple périphérique lisse (44), en ce que le rouleau inférieur (38) est rainuré, en ce qu'il est prévu comme bande supérieure un feutre supérieur (12) relativement étanche dont la perméabilité à l'eau est inférieure à celle du filtre inférieur (50) mais permet néanmoins encore l'élimination d'eau supplémentaire hors de la bande fibreuse (46) dans la presse principale (30) lors du pressage sur le cylindre de séchage (60), la perméabilité à l'eau du feutre supérieur (12) étant encore telle qu'il en résulte dans la presse principale (30) une augmentation de la siccité de la bande fibreuse (46) de plus de 2 % et/ou la perméabilité à l'eau du feutre supérieur (12) étant choisie de telle manière qu'il en résulte après la presse principale (30) une siccité finale de la bande fibreuse (46) de plus de 42 %, et en ce que le rouleau de pressage (28) associé à la pressé principale (30) possède une surface perforée et/ou rainurée destinée à recueillir l'eau extraite par le pressage.
  2. Machine suivant la revendication 1, caractérisée en ce que l'unité de patin de pressage de la presse préliminaire est un rouleau de presse à patin (40) et la bande de pressage lisse associée est une enveloppe de pressage lisse (44).
  3. Machine suivant la revendication 1 ou 2, caractérisée en ce que le rouleau de pressage (28) de la presse principale (30) est un rouleau conventionnel pourvu d'un revêtement de caoutchouc élastique.
  4. Machine suivant la revendication 1 ou 2, caractérisée en ce que le rouleau de pressage (28) de la presse principale (30) est un rouleau de presse à patin pourvu d'une enveloppe de pressage souple (84).
  5. Machine suivant la revendication 3 ou 4, caractérisée en ce que l'enveloppe (84) du rouleau de pressage (28) est pourvue de trous borgnes.
  6. Machine suivant la revendication 5, caractérisée en ce que l'enveloppe (84) du rouleau de pressage (28) présente à l'état neuf une partie de surface perforée, qui vaut environ 20 à environ 35 % de la surface totale.
  7. Machine suivant la revendication 5 ou 6, caractérisée en ce que le diamètre des trous à l'état neuf de l'enveloppe (84) se situe dans une plage d'environ 2 à environ 3 mm.
  8. Machine suivant l'une quelconque des revendications 5 à 7, caractérisée en ce que la profondeur des trous à l'état neuf de l'enveloppe (84) se situe dans une plage d'environ 1,5 à environ 3 mm.
  9. Machine suivant l'une quelconque des revendications précédentes, caractérisée en ce que le feutre supérieur (12) est mené à partir de la presse préliminaire (26) directement, c'est-à-dire en particulier sans rouleau de déviation intermédiaire, à la presse principale (30).
  10. Machine suivant l'une quelconque des revendications précédentes, caractérisée en ce que l'enveloppe de pressage (84) du rouleau de pressage (28) ayant la forme d'un rouleau de presse à patin est soutenue, au moins dans la région entourée par le feutre supérieur (12), par de petits cylindres d'appui ou segmentés (86) disposés l'un derrière l'autre dans le sens périphérique de l'enveloppe, qui sont supportés sur une traverse immobile (74) traversant l'enveloppe de pressage (84).
  11. Machine suivant la revendication 10, caractérisée en ce que le diamètre des cylindres d'appui (86) se situe dans une plage d'environ 60 à environ 120 mm.
  12. Machine suivant la revendication 10 ou 11, caractérisée en ce que les cylindres d'appui (86) sont réalisés en plusieurs parties sur la largeur de la machine s'étendant transversalement au sens de circulation de la bande.
  13. Machine suivant la revendication 12, caractérisée en ce que le rapport entre la distance mutuelle des paliers (88) de chaque cylindre d'appui partiel et le diamètre des cylindres se situe dans une plage d'environ 7,5 à environ 15, et vaut de préférence environ 12.
  14. Machine suivant la revendication 12 ou 13, caractérisée en ce que la région non soutenue entre les faces d'extrémité des cylindres d'appui partiels de chaque rangée de cylindres s'étendant dans le sens de la largeur de la machine vaut au maximum environ 10 à environ 25 mm.
  15. Machine suivant l'une quelconque des revendications 12 à 14, caractérisée en ce que la distance angulaire entre les cylindres d'appui (86) se succédant dans le sens périphérique de l'enveloppe se situe dans une plage d'environ 7,5 à environ 15°.
  16. Machine suivant l'une quelconque des revendications précédentes, caractérisée en ce que le feutre inférieur (50) est évacué de la fente de pressage (48) d'une manière générale le long d'une tangente (72) touchant le rouleau inférieur (38) de la presse préliminaire (26) au point terminal de la fente de pressage associée (48) et la déviation directionnelle maximale (α) par rapport à cette tangente (72) se situe de préférence dans une plage d'environ -2° à +4°.
  17. Machine suivant l'une quelconque des revendications précédentes, caractérisée en ce que l'angle d'ouverture (β-α) prévu immédiatement après la fente de pressage (48) de la presse préliminaire (26) entre le feutre supérieur (12) entraínant la bande fibreuse (46) et le feutre inférieur (50) se situe dans une plage d'environ 4 à environ 15°.
  18. Machine suivant l'une quelconque des revendications précédentes, caractérisée en ce que la force linéique produite dans la fente de pressage (48) de la presse préliminaire (26) se situe dans une plage d'environ 60 à environ 300 kN/m et la longueur de la fente de pressage considérée dans le sens de circulation de la bande se situe de préférence dans une plage d'environ 80 à environ 200 mm.
  19. Machine suivant l'une quelconque des revendications précédentes, caractérisée en ce que la pression produite dans la fente de pressage (48) de la presse préliminaire (26) augmente dans le sens de circulation de la bande jusqu'à une pression maximale d'environ 1,5 à environ 4 Pa et ensuite chute brusquement.
  20. Machine suivant l'une quelconque des revendications précédentes, caractérisée en ce que la presse principale (30) est un patin de pressage et en ce que la force linéique maximale produite dans la fente de pressage (90) de la presse principale (30) se situe dans une plage d'environ 100 à environ 200 kN/m.
  21. Machine suivant l'une quelconque des revendications précédentes, caractérisée en ce que la presse principale (30) est un patin de pressage et en ce que la longueur de la fente de pressage (90) de la presse principale (30), mesurée dans le sens de circulation de la bande, se situe dans une plage d'environ 50 à environ 120 mm.
  22. Machine suivant l'une quelconque des revendications précédentes, caractérisée en ce que la presse principale (30) est un patin de pressage et en ce que la pression produite dans la fente de pressage (90) de la presse principale (30) augmente d'abord relativement lentement dans le sens de circulation de la bande et chute ensuite relativement rapidement.
  23. Machine suivant l'une quelconque des revendications précédentes, caractérisée en ce que la presse principale (30) est un patin de pressage et en ce que la pression maximale produite dans la fente de pressage (90) de la presse principale (30) se situe dans une plage d'environ 2,5 à environ 5 MPa.
  24. Machine suivant l'une quelconque des revendications précédentes, caractérisée en ce que la pression maximale produite dans la fente de pressage (90) de la presse principale (30) est plus élevée que celle produite dans la fente de pressage (48) de la presse préliminaire (26).
  25. Machine suivant l'une quelconque des revendications précédentes, caractérisée en ce que la perméabilité à l'eau du feutre supérieur (12) est au maximum 1/3, de préférence au maximum 1/4, de celle du feutre inférieur (50).
  26. Machine suivant l'une quelconque des revendications précédentes, caractérisée en ce que le rouleau de pressage (28) de la presse principale (30) est un rouleau de presse à patin et en ce que la surface de l'enveloppe de pressage (84) du rouleau de pressage (28) est pourvue aussi bien de trous borgnes que de rainures.
  27. Machine suivant la revendication 26, caractérisée en ce que la somme des parties de la surface de l'enveloppe de pressage (84) du rouleau de pressage (28) pourvues de trous borgnes et de rainures vaut, à l'état neuf de l'enveloppe de pressage (84), environ 25 à environ 40 % de la surface totale.
  28. Machine suivant la revendication 26 ou 27, caractérisée en ce que la profondeur des rainures vaut environ 1/10 à environ 1/3 de la profondeur des trous borgnes.
  29. Machine suivant l'une quelconque des revendications 26 à 28, caractérisée en ce que la largeur des rainures se situe dans une plage d'environ 0,3 à environ 0,6 mm.
  30. Machine suivant l'une quelconque des revendications 26 à 29, caractérisée en ce que les rainures coupent au milieu les trous borgnes d'une ligne de trous borgnes sur deux et passent au milieu entre les trous borgnes des lignes intermédiaires.
  31. Machine suivant l'une quelconque des revendications 26 à 29, caractérisée en ce que les rainures passent au milieu entre deux lignes voisines de trous borgnes et ne coupent aucun trou borgne.
  32. Machine suivant l'une quelconque des revendications précédentes, caractérisée en ce qu'il est prévu, dans la région du rouleau inférieur rainuré (38) de la presse préliminaire (26), une cuvette de récupération (66) pour récupérer l'eau expulsée hors des rainures du rouleau inférieur (38).
  33. Machine suivant l'une quelconque des revendications précédentes, caractérisée en ce qu'il est prévu, dans la région du rouleau de pressage (28), munie de trous borgnes et de rainures, de la presse principale (30), une cuvette de récupération (64) pour récupérer l'eau expulsée hors des trous borgnes et des rainures du rouleau de pressage (28).
  34. Machine suivant l'une quelconque des revendications précédentes, caractérisée en ce qu'un racloir d'eau avec une lame de raclage d'eau applicable sous pression sur son enveloppe de pressage (84) est associé au rouleau de pressage (28) de la presse principale (30).
  35. Machine suivant l'une quelconque des revendications précédentes, caractérisée en ce qu'il est prévu des buses de pulvérisation et des fentes d'aspiration, en particulier transversales, oscillantes ou même immobiles, pour le nettoyage du feutre supérieur (12).
  36. Machine suivant l'une quelconque des revendications précédentes, caractérisée en ce qu'il est prévu, pour le nettoyage du feutre supérieur (12) suivant le principe du déplacement, des moyens pour pulvériser une eau claire, largement exempte de particules de crasses, sur le côté intérieur du feutre supérieur (12), qui est ensuite refoulée à travers le feutre supérieur et la bande fibreuse (46) dans le feutre inférieur (50) dans la presse préliminaire.
  37. Machine suivant l'une quelconque des revendications précédentes, caractérisée en ce qu'il est prévu des moyens pour une correction de l'humidité de la bande sur la largeur de la machine, par lesquels la quantité d'eau de lavage peut être modifiée sur la largeur de la machine.
  38. Machine suivant l'une quelconque des revendications 1 à 36, caractérisée en ce qu'il est prévu plusieurs tubes de pulvérisation (58) alimentés avec de l'eau à température différente, avec une sortie d'eau réglable sur la largeur de la machine, avec lesquels on peut régler différentes températures de feutre.
EP97119305A 1996-12-23 1997-11-05 Machine pour la fabrication d'une bande fibreuse Expired - Lifetime EP0854229B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19654198A DE19654198A1 (de) 1996-12-23 1996-12-23 Maschine zur Herstellung einer Faserstoffbahn
DE19654198 1996-12-23

Publications (3)

Publication Number Publication Date
EP0854229A2 EP0854229A2 (fr) 1998-07-22
EP0854229A3 EP0854229A3 (fr) 1999-07-28
EP0854229B1 true EP0854229B1 (fr) 2003-04-09

Family

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Application Number Title Priority Date Filing Date
EP97119305A Expired - Lifetime EP0854229B1 (fr) 1996-12-23 1997-11-05 Machine pour la fabrication d'une bande fibreuse

Country Status (4)

Country Link
US (1) US6004429A (fr)
EP (1) EP0854229B1 (fr)
AT (1) ATE237027T1 (fr)
DE (2) DE19654198A1 (fr)

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DE19819526A1 (de) 1998-04-30 1999-11-04 Voith Sulzer Papiermasch Gmbh Preßmantel
FI104100B1 (fi) 1998-06-10 1999-11-15 Valmet Corp Integroitu paperikone
DE19833423A1 (de) * 1998-07-24 2000-01-27 Voith Sulzer Papiertech Patent Walzenpresse
US6248210B1 (en) 1998-11-13 2001-06-19 Fort James Corporation Method for maximizing water removal in a press nip
US6209224B1 (en) * 1998-12-08 2001-04-03 Kimberly-Clark Worldwide, Inc. Method and apparatus for making a throughdried tissue product without a throughdrying fabric
DE19860687A1 (de) * 1998-12-29 2000-07-06 Voith Sulzer Papiermasch Gmbh Maschine sowie Verfahren zur Herstellung einer Faserstoffbahn
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DE19905515A1 (de) * 1999-02-10 2000-08-17 Voith Sulzer Papiertech Patent Pressenanordnung
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CA2405162C (fr) 2000-05-18 2008-12-30 Metso Paper Karlstad Ab Machine a papier crepe et sa section presse
ATE352666T1 (de) 2000-05-18 2007-02-15 Metso Paper Karlstad Ab Weichkrepp-papiermaschine und deren pressenpartie
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Also Published As

Publication number Publication date
EP0854229A3 (fr) 1999-07-28
DE59709774D1 (de) 2003-05-15
US6004429A (en) 1999-12-21
ATE237027T1 (de) 2003-04-15
DE19654198A1 (de) 1998-06-25
EP0854229A2 (fr) 1998-07-22

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