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Device for dry-forming a fibrous web

A dry-laid, fiber-web technology used in textiles, papermaking, nonwovens, etc.

Inactive Publication Date: 2013-07-24
OERLIKON TEXTILE GMBH & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this results in different suction flows in the forming zone, which lead to different deposition behavior of the fibers inside the forming zone

Method used

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  • Device for dry-forming a fibrous web
  • Device for dry-forming a fibrous web
  • Device for dry-forming a fibrous web

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0025] in figure 1 with 2 A first embodiment of the device according to the invention is schematically shown in. in figure 1 The embodiment is briefly shown in a cross-sectional view, and in figure 2 This embodiment is simply shown in a top view without a forming head. As long as it is not clearly indicated which drawing to refer to, the following description applies to both drawings.

[0026] This embodiment shows a mixing chamber 1 which is connected via a fiber inlet 2 to a fiber conveying device not shown here. The fiber inlet 2 may contain one or more connections in order to convey one or more fibers or fiber mixture to the mixing chamber 1 by air flow. The mixing chamber 1 is connected to the forming head 3 on the bottom surface. The forming head 3 has a plurality of devices not shown here in order to distribute fibers or fiber mixtures and uniformly discharge them as a stream of fibers on the forming outlet 4 formed on the bottom surface. The forming outlet 4 preferabl...

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PUM

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Abstract

The invention relates to a device for dry-forming a fibrous web, in which a plurality of fibers or fiber mixtures are supplied to a forming head by means of an air flow. The forming head comprises a forming outlet, which is arranged above a gas-permeable deposit belt. The deposit belt cooperates with a suction unit (16) in order to receive the fiber flow exiting the forming outlet. The fibers deposited on the deposit belt (6) within a forming zone are continuously conveyed out of the forming zone by the deposit belt. A clearance of the forming zone formed between the forming head and the deposit belt is shielded with respect to the surroundings by several sealing means. In order to obtain as uniform a composition of the fiber layer as possible when depositing the fibers, the sealing means arranged on a feed side forms an inlet opening having an adjustable inflow cross-section through which a defined secondary air flow flows from the surroundings into the clearance.

Description

Technical field [0001] The present invention relates to an apparatus for dry laying of fiber webs according to the preamble of claim 1. Background technique [0002] In the production of nonwoven fabrics, it is known to lay up fibers into a fiber layer on a laying belt by means of air flow. The basis of this process, which is commonly referred to as airlaid in the industry, is that fibers or fiber mixtures are evenly distributed on the surface of the laying belt by means of a forming head. The area on the laying belt covered by the forming head is usually called the forming zone in which the fibers hit the laying belt. [0003] Such a device is known from EP0006696A1, for example. [0004] In this known device, a plurality of fibers or fiber mixtures are conveyed to the forming head by means of an air stream. There are multiple devices inside the forming head for mixing and distributing fibers. A forming outlet is formed on the bottom surface of the forming head, and the forming ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D04H1/732B29C48/03
CPCD04H1/732B29C47/0009B29C48/03
Inventor O·施瓦茨I·梅尔曼
Owner OERLIKON TEXTILE GMBH & CO KG