摘要:
The invention provides a press roller, having a roller jacket made of plastic material, for treating a web of paper, board, tissue or another fibrous material in a machine for the manufacturing and/or finishing thereof. The aim of the invention is to enlarge the application fields of the press roller. Said aim is achieved, whereby the outer surface of the roller jacket is at least partially provided with a temperature-resistant protective layer and/or covering.
摘要:
Process for manufacturing a roll press jacket, wherein the roll press jacket includes a hollow cylindrical sleeve made of an castable elastomeric material containing at least one crystallization component, the sleeve has an interior cylindrical surface and an exterior cylindrical surface. The internal surface and the external surface have different hardness characteristics. The process includes using a cylindrical casting mold having an casting surface, the casting mold having a temperature which is maintained at a temperature colder than an elastomeric material being cast, casting a hollow cylindrical sleeve from the elastomeric material on the casting mold, the elastomeric material containing at least one crystallization component, providing the sleeve with an interior cylindrical surface and an exterior cylindrical surface, one of the internal or external surfaces being formed against the casting surface of the cylindrical casting mold, wherein the surface of the sleeve which is formed against the casting surface is harder than a surface which is not formed against the casting surface.
摘要:
Press sleeve for de-watering a material sheet in a press nip having a width. The press sleeve may extend transverse to a travel direction of the material sheet and may include a flexible material, a pressing area, adapted to form the press nip, having two ends, end sections positioned adjacent to each end of the pressing areas, and recesses located on an exterior surface to take up water. The press sleeve may also include outer sections including portions of the pressing area and portions of the end section, an inner section including a portion located between the outer sections. The recesses located within the outer sections may include a plurality of recesses having a limited length in the travel direction and the recesses located within the inner section may include grooves substantially extending endlessly in the travel direction.
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 elastomeric material which is of homogeneous, 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 provides a press roller, having a roller jacket made of plastic material, for treating a web of paper, board, tissue or another fibrous material in a machine for the manufacturing and/or finishing thereof. The aim of the invention is to enlarge the application fields of the press roller. Said aim is achieved, whereby the outer surface of the roller jacket is at least partially provided with a temperature-resistant protective layer and/or covering.
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 sheath for a pressing device, the sheath having a cylindrical circumferential face having a circumferential face radius and an annular bearing resiliently mounted to at least one axial end of the sheath in a spring elastic manner. The annular bearing has a smaller radius than the circumferential face radius. Additionally, the sheath has a bellows-shaped transition region extending at the at least one axial end of the sheath from the cylindrical circumferential face to the annular bearing.
摘要:
A flexible press cover which has an additional strengthening element in at least one of its two end regions. As a result, in the end region, the tensile strength and the tensile rigidity in the circumferential direction are increased with respect to that hitherto known in such a way that it is no longer necessary to clamp the press cover end region in between two components. Instead, the press cover according to the present invention is suitable to be fixed to the outer circumferential surface of a rotatable supporting element belonging to the cover carrying disk without the aid of an outer ring, a clamping band, clamping filament or the like. In the most beneficial case, the arrangement for fixing the press cover to the aforementioned supporting element is completely free of any kind of fixing elements which would be associated with the cover outer surface.
摘要:
The present invention is directed to a roll cover for a calender or press roll for treating a material web. The roll cover includes a layer of elastomeric material having filaments running approximately longitudinally with respect to a web run direction and transversely to the web run direction embedded for reinforcement, and at least one layer of additional reinforcing filaments embedded in at least some sections of the elastomeric layer. The additional reinforcing filaments run at an angle between 20° and 70° with respect to the web run direction. The layer is arranged to form roll ends connectable to a roll axle. The instant abstract is neither intended to define the invention disclosed in this specification nor intended to limit the scope of the invention in any way.
摘要:
Roll press jacket and process for manufacturing a roll press jacket. The roll press jacket includes a hollow cylindrical sleeve made of an castable elastomeric material containing at least one crystallization component, the sleeve has an interior cylindrical surface and an exterior cylindrical surface. The internal surface and the external surface have different hardness characteristics. The process includes using a cylindrical casting mold having an casting surface, the casting mold having a temperature which is maintained at a temperature colder than an elastomeric material being cast, casting a hollow cylindrical sleeve from the elastomeric material on the casting mold, the elastomeric material containing at least one crystallization component, providing the sleeve with an interior cylindrical surface and an exterior cylindrical surface, one of the internal or external surfaces being formed against the casting surface of the cylindrical casting mold, wherein the surface of the sleeve which is formed against the casting surface is harder than a surface which is not formed against the casting surface.