Abstract:
The present invention is a machine for manufacturing a fibrous web from a fibrous suspension, with a sheet forming area that exhibits at least one suction box, which includes a main box with at least one suction box cover that is formed from at least two drainage elements that run laterally to the machine's running direction, border a suction slit, and each has one main body and at least one ceramic. The present invention is identified by the fact that at least one drainage element and/or one format slide exhibit at least one removable edge piece in which is integrated at least one temperature sensor in order to measure the temperature in the ceramic and/or the temperature at an adhesive point between the ceramic and the associated main body and/or the temperature in the main body. The present invention is furthermore a process and a system for monitoring a drainage element.
Abstract:
The arrangement is for use within a machine for at least one of making and processing at least one of paper, cardboard and tissue. The arrangement includes a first unit, a support piece and at least one clamping device. A first unit has a shaped part together with a wear part, the shaped part having a part underside. The part underside has an underside length, the shaped part displaying a part contour upon the part underside along substantially all of the underside length. A support piece interlocks with the shaped part, the support piece having a support piece top and a corresponding top length. The support piece has a piece contour upon the support piece top along substantially all of the top length, the piece contour being substantially complimentary to the part contour. At least one clamping device is operatively positioned relative to both the part contour and the piece contour.
Abstract:
Twin wire former and method for manufacturing a fibrous material web from a fibrous suspension using same. The twin wire former comprises a movable bottom wire belt and a movable top wire belt converging at a twin wire zone. The twin wire zone has a first section, a second section and an end section. A rotating forming roller is disposed at the first section of the twin wire zone, and the to wire and the bottom wire form a wedge-shaped inlet gap at the first section of the twin wire zone. The inlet gap is adapted to receive the fibrous suspension from a headbox. The bottom wire belt and the top wire belt are adapted to form the fibrous web therebetween at the second section of the twin wire zone, and the second section of the twin wire zone has at least one drainage element. A separating device is disposed at the end of the twin wire zone and is adapted to separate one wire belt from another the wire belt. The twin wire zone has a section disposed in a steep downward direction downstream of the forming roller in relation to the movement of the wires. Also disclosed is a method for manufacturing a fibrous material web from a fibrous suspension using a twin wire former.
Abstract:
A support band for a drying arrangement for drying one of a paper, a board, a tissue and a fibrous web in a papermaking machine for at least one of producing and finishing the same, the support band including a water-impermeable sealing layer and at least one water-absorbing storage layer. The at least one water-absorbing storage layer being adjacent to the water-impermeable sealing layer. At least one of the water-impermeable sealing layer or the water-absorbing storage layer being made, at least partially, of a highly thermally conductive material.
Abstract:
Twin-wire former for producing a fibrous material web from a fibrous suspension and process for separating upper and lower wires of the twin-wire former. The twin-wire former includes a twin-wire zone composed of a lower wire and an upper wire and a plurality of rolls including an inlet roll and an outlet roll. The upper wire is guidable over the plurality of rolls, the inlet roll guides the upper wire to the twin-wire zone, and the outlet roll guides the upper wire toward the inlet roll. A wedge-shaped inlet zone is formed between the upper wire and the lower wire and has an adjustable inlet wedge angle. An upper wire subassembly includes a drainage box adapted to receive suspension water that flows upwardly through the upper wire, and further includes a pivotable common support device, to which the drainage box and the inlet roll are mounted. A stroke device is coupled to the pivotable common support device to lift the pivotable common support device around a first horizontal axle. In this manner, the inlet wedge angle is varied during former operation. After a maximal inlet wedge angle is formed, continued lifting of the pivotable common support device by the stroke device causes the upper wire subassembly to lift up from the lower wire, thereby separating the upper wire from the lower wire. A second horizontal pivot axle associated with the upper wire subassembly and located in a region of the outlet roll is provided. The separating of the upper and lower wires occurs around the second horizontal pivot axle. The process includes lifting the common support device with the stroke device, such that the common support device is pivotably supported by the first horizontal axle and the inlet wedge angle is increased, and, upon maximally increasing the inlet wedge angle, further lifting the common support device with the stroke device, such that the common support device is pivotably supported by the second horizontal axle and is disengaged from the first horizontal axle. In this manner, the upper wire is lifted up from the lower wire.
Abstract:
A wire section for forming a multi-ply fiber web. The wire section includes a first belt which advances a first fiber ply toward a couch roll defining a combining section. A twin-wire zone of the wire section includes first and second wires between which a second fiber ply is initially formed in a gap former. The second wire separates from the first wire and then the first wire supporting the second fiber ply meets the first belt supporting the first fiber ply at the couch roll of the combining section to form the multi-ply fiber web. The twin-wire part is arranged upstream of the combining section along the running direction of the first belt. The second fiber ply runs on the first wire into the combining section at an angle less than 90° with respect to the belt entering the combining section. The path of the wires from the forming roll to the combining section is disclosed. A suction box or arrangement holds the second fiber ply to the first wire when the first and second wires separate. Dewatering foils press on the wires moving through the twin-wire zone.
Abstract:
Process and apparatus for influencing web characteristic in a machine for producing a fibrous web. The process includes guiding the fibrous material web in a still-wet state and stretching the still-wet state fibrous material web in a crosswise direction. The apparatus includes a stretching device arranged to stretch the fibrous material web in a still-wet state in a direction crosswise to a travel direction.
Abstract:
An apparatus for at least one of producing and treating a material web is provided including at least one wire; an outer sealing belt, which is wider than said at least one wire, comprising a pair of lateral edge regions; at least one heatable unit, having an outer cylindrical surface, wherein said at least one wire and said outer sealing belt are at least partially wrapped around said at least one heatable unit; an overpressure cap arranged to form a pressure chamber containing a medium under pressure, said medium under pressure exerting a pressure on said at least one heatable unit; and at least one of: (a) a seal formed between said lateral edge regions and said heatable unit; and (b) a seal formed between end faces of said overpressure cap and an opposing wall to seal said pressure chamber from an external environment.
Abstract:
Suction device and process for at least one of conditioning and drainage of an endless felt. The device includes a housing having at least one vacuum chamber, and a plurality of suction slits located on a suction surface of the housing that is adapted to face the endless felt. The plurality of suction slits are oriented to extend at least one of in and obliquely to a travel direction of the endless felt. The process includes guiding the endless belt over a suction surface of a vacuum chamber, and suctioning a surface of the endless belt with a plurality of suction slits located in the suction surface of the vacuum chamber. The plurality of suction slits extend in a direction that is at least one of in and oblique to a belt travel direction.
Abstract:
A belt for a material web producing machine and a process of producing the belt. The belt includes a plurality of long-chain strength supports arranged to form interstices and a filler at least partially filling the interstices. The process includes forming a sheet from a plurality of long-chain strength supports with the sheet including a plurality of interstices disposed between the long-chain strength supports, and filling at least a portion of the interstices with a filler.