Curtain coater

A coating machine and curtain-type technology, applied to the surface coating liquid device, coating, paper, etc., can solve the problems of high cost and disadvantages, and achieve the effect of ensuring pressure and/or volume distribution

Inactive Publication Date: 2011-03-30
ANDRITZ KUESTERS GMBH & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Furthermore, it is disadvantageous to require an additional actuator for the adjustment of the cross section
Accordingly, the costs associated with this outlay are large

Method used

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Examples

Experimental program
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Embodiment Construction

[0023] The present invention relates to a curtain coater for discharging coating medium onto a moving paper or board web in the form of a curtain moving substantially under gravity.

[0024] Such as figure 1 and figure 2 Shown, for this purpose, the curtain coater according to the prior art comprises a hopper with a first chamber 1 extending along the discharge width. The first chamber 1 is supplied with coating medium via at least one feed line (not shown). The flow direction S of the coating medium to be fed can start from one end of the chamber 1, as figure 1 shown. The hopper also comprises a second chamber 3 which discharges the coating medium via an outlet slot 3 as a curtain. Arranged between the first chamber 1 and the second chamber 3 is a further metering channel 2 which is formed as a metering slot. The flow direction S is at right angles to the transverse direction of the curtain coater.

[0025] The length lh and the height 2h of the metering channel formed...

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PUM

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Abstract

A curtain coater is used for discharging a coating medium to a movable paper or plate in a form of a movable curtain by weight approximately. the curtain coater includes: a storage device having a first chamber extending in a discharging width and a metering channel for discharging the coating medium as a curtain by a feeding line, wherein the metering channel (2) is divided into multiple individual guide channels, which abut against the first chamber (1) through spaced pipe sections (2.1) on an inlet side and along the discharging width, the lengths and aperture widths of the pipe sections (2.1) are selected for equalization of the flow resistance along the discharging width. Furthermore, in a flow direction (S), the pipe sections (2.1) are replaced by diffusers (2.2) respectively for guiding split flows from the guide channels together on an outlet side.

Description

technical field [0001] The present invention relates to a curtain coater for discharging a liquid or viscous coating medium in the form of a curtain or film moving substantially under gravity onto a moving substrate, particularly paper or board. Background technique [0002] A curtain coater is known from DE 100 57 733 A1 which comprises a nozzle chamber into which a coating medium is fed via a feed line and which is discharged via a discharge opening as a curtain or film. Coating medium. In this case, the curtain coater is located at a distance from the substrate, which leads to the advantage of non-contact application. [0003] It is difficult to achieve a curtain of coating media of uniform thickness across the entire coating width, and the wider the coating width, the more difficult it is to achieve. Because the coating media stretches when in contact with the substrate due to the difference between the speed of the coating media just before it impacts on the substrate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05C5/02D21H23/48
CPCB05C5/0254B05C11/1002
Inventor 爱德华·达维丹科安德烈亚斯·佩希
Owner ANDRITZ KUESTERS GMBH & CO KG
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