Device for hydrodynamically strengthening nonwovens, wovens or knitted fabrics

Abstract

The invention relates to a device for hydrodynamically strengthening nonwovens, wovens or knitted fabrics, comprising a base drum (1), which has a plurality of bore holes (4) and on which a structural drum (6) is arranged at a spacing, wherein the distance between the base drum (1) and the structural drum (6) can be produced with a plurality of wires (5, 5', 5", 5"',...) that are arranged on the surface of the base drum (1) and are at least partially integrally joined to the base drum (1), the wires (5, 5', 5", 5"',...) being arranged parallel to each other on the surface of the base drum (1), characterised in that the wires (5, 5', 5", 5"',...) are arranged on the surface of the base drum (1) at an angle alpha of 5° to 45°, preferably 15° to the longitudinal axis of the base drum (1).

Description

technical field

[0001] The invention relates to a device for hydrodynamically fixing nonwovens, wovens or knitted fabrics, in which a liquid, such as water, is sprayed from a plurality of nozzles towards the material to be fixed. The material to be fixed travels via a rotating liquid-permeable drum, which can additionally be subjected to a negative pressure for the suction of water. Usually, the drum is formed as a cylindrical solid base drum with holes which ensure a high water discharge. At a distance from the basic drum, a structured drum is provided, which can have finely perforated holes for fixing the fibers, but can also impart a surface structure in the form of a pattern to the material to be fixed. Background technique

[0002] A base roller is known from EP 0 223 614 B2, which consists of a solid cylindrical base body. Parallel to the longitudinal axis, a plurality of grooves or depressions are milled into the basic body, so that sharply constricted ribs remain. ...

Examples

Embodiment Construction

[0032] exist figure 1 A base cylinder 1 is shown in , which has a plurality of holes 4 on its surface. The basic drum 1 can be designed as a solid cylindrical component or as a component with a plurality of cylindrical supports 3 on which a sheet metal 2 or a fabric with a plurality of holes 4 is stretched. In this exemplary embodiment, the sheet metal 2 is stretched on two cylindrical supports 3 , of which only the supports 3 are shown. The support 3 is arranged in the region of the end faces of the base drum 1 and is designed to receive bearing parts (not shown) on both sides. The wall thickness of the solid base cylinder 1 can be between 2 mm and 10 mm. In the case of thin plates 2, the wall thickness can be between 1 mm and 6 mm.

[0033]The bore 4 is generally cylindrical and can have a diameter of 2 mm to 10 mm, preferably 3.5 mm to 5 mm. The contour of the hole 4 can have an oval, square or other shape. Furthermore, the cross-section of the holes 4 can vary over th...

technical field

[0001] The invention relates to a device for hydrodynamically fixing nonwovens, wovens or knitted fabrics, in which a liquid, such as water, is sprayed from a plurality of nozzles towards the material to be fixed. The material to be fixed travels via a rotating liquid-permeable drum, which can additionally be subjected to a negative pressure for the suction of water. Usually, the drum is formed as a cylindrical solid base drum with holes which ensure a high water discharge. At a distance from the basic drum, a structured drum is provided, which can have finely perforated holes for fixing the fibers, but can also impart a surface structure in the form of a pattern to the material to be fixed. Background technique

[0002] A base roller is known from EP 0 223 614 B2, which consists of a solid cylindrical base body. Parallel to the longitudinal axis, a plurality of grooves or depressions are milled into the basic body, so that sharply constricted ribs remain. ...

Examples

Embodiment Construction

[0032] exist figure 1 A base cylinder 1 is shown in , which has a plurality of holes 4 on its surface. The basic drum 1 can be designed as a solid cylindrical component or as a component with a plurality of cylindrical supports 3 on which a sheet metal 2 or a fabric with a plurality of holes 4 is stretched. In this exemplary embodiment, the sheet metal 2 is stretched on two cylindrical supports 3 , of which only the supports 3 are shown. The support 3 is arranged in the region of the end faces of the base drum 1 and is designed to receive bearing parts (not shown) on both sides. The wall thickness of the solid base cylinder 1 can be between 2 mm and 10 mm. In the case of thin plates 2, the wall thickness can be between 1 mm and 6 mm.

[0033]The bore 4 is generally cylindrical and can have a diameter of 2 mm to 10 mm, preferably 3.5 mm to 5 mm. The contour of the hole 4 can have an oval, square or other shape. Furthermore, the cross-section of the holes 4 can vary over th...

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