摘要:
A roll sleeve for use in a press device for the dewatering of paper, cardboard, tissue or another fibrous web in a papermaking machine for the production and/or conversion of the web. The roll sleeve including an outer sleeve having a surface. The surface including a plurality of grooves progressing approximately in a circumferential direction. The grooves being axially adjacent and arranged in the same direction. The grooves having a length, The grooves being offset against each other by a substantially equal amount. The amount of the offset being between 10% and 50% of the groove length.
摘要:
Flexible press sleeve for a press roll for treating a web includes an inside surface including a longitudinal press area adapted to be pressurized with a press shoe by directing pressure radially outward, and a flexible section on at least one end of the press area having a greater flexibility than a flexibility of the press sleeve outside the flexible section, without causing a significant weakening of the press sleeve within the flexible section. A press shoe includes the press roll and a mating roll forming a press opening with the press roll. A method of treating a web includes draining a fibrous pulp web by using the press shoe.
摘要:
Press device to treat a fibrous pulp web that may include a shoe press roll and a mating roll. The shoe press roll and the mating roll may be positioned to form a press nip, and at least one endless belt guided through the press nip and forming a substantially non-flexible and rigid drive element at least partially driving the press device.
摘要:
A roll, especially for press rolls in paper machines includes an elastomeric shell separated from a roll core. The roll is characterized by the fact that, in the region of the axial end of the roll core, there is a large reduction in thickness of the roll shell, with the reduced thickness provided substantially at the axial end of the roll shell or in an annular transition region spaced from and near the end of the shell.
摘要:
A press blanket for a press device in a paper making machine, or the like, is formed of an elastomeric blanket material and fully embedded layers of reinforcement threads. The radially inner layer is formed of longitudinal threads which extend parallel to the axis of the press blanket. The radially outer layer is formed of circumferential threads which are wound in the direction of blanket motion and are wound generally helically. The threads are fully surrounded by the layer of homogeneous elastomeric material, that is formed from a single pouring. The circumferential threads have a diameter of at most 1/500 of the outside diameter of the fully rounded press blanket. In a unit area of the press blanket, the tensile strength of the circumferential threads is at least 40% greater than the tensile strength of the longitudinal threads. An apparatus for forming such a press blanket includes a rotatable pouring cylinder on which the longitudinal threads are supported, an elastomeric material pouring nozzle which moves longitudinally over the pouring cylinder and an unwinding device for delivering the circumferential threads in a helical manner and located just after the pouring nozzle above the pouring cylinder.
摘要:
The invention relates to a roll cover for treating a paper, cardboard, tissue or other fibrous web in a machine for manufacturing and/or converting them, comprising one or more plastic layers, of which at least one is of compressible configuration, and at least one carrier element in the form of a woven fabric, laid scrim or the like. Here, the loading of the support structure is intended to be reduced by at least one carrier element being embedded into a compressible plastic layer.
摘要:
A press belt for the formation of a nip between the belt and an opposing surface during processing of a fibrous pulp web, that includes a matrix of an elastomer material, a first layer of reinforcing fibers having a thickness and spacings therebetween, and extending in a direction transverse to a belt run direction, and a second layer of reinforcing fibers having a thickness and spacings therebetween, and extending in the belt run direction, where the thicknesses of the reinforcing fibers of the first layer and the second layer is about 0.5 mm, where the spacings between the reinforcing fibers of the first layer are less than or equal to about 3.0 mm, where the spacings between the reinforcing fibers of the second layer being less than or equal to 2.5 mm, and where the reinforcing fibers of the first layer are separated in a belt thickness direction from the reinforcing fibers of the second layer one layer by a distance of up to about 4 mm.
摘要:
The present invention provides a press jacket of a press device and a method for treating a material web, in particular a paper or cardboard web, in a nip, where the press jacket has an outer circumferential surface that is provided with grooves and/or blind bores. The grooves and/or bores include a side wall having an the opening region with a bevel and/or a rounded section that extends along a curved line, in order to counteract a volume reduction that occurs when the press device is loaded.
摘要:
Process for manufacturing a press jacket of flexible material for a press device and a press jacket that is adapted to drain a material web in a press opening in a paper making machine. The process includes arranging at least one reinforcing fiber in a jacket material that forms the press jacket so that the reinforcing fibers are arranged to run substantially in a peripheral direction of the press jacket, forming grooves to run substantially in the peripheral direction in at least one surface of the press jacket, and orienting the arrangment of the at least one reinforcing fiber and the formation of the grooves relative to each other so that the at least one reinforcing fiber and the grooves do not run radially superposed in a same direction.
摘要:
The invention relates to a flexible roll sleeve (3) of a press roll used for processing a paper web, cardboard web, tissue web, or another fiber web (1) in a machine for producing and/or refining the same. Said flexible roll sleeve (3) comprises interior supporting elements (5) composed of at least two circumferential layers. In order to increase the service life especially of large press rolls, the layer (7) located on the inside in a radial direction is harder than the layer (8) located on the outside.