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Curtain application device

A coating machine and curtain type technology, applied in the field of curtain type coating machine, can solve the problems of production interference and high risk of clogging

Inactive Publication Date: 2011-05-04
ANDRITZ KUESTERS GMBH & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this design has low space requirements, it has the disadvantage that the feed holes have to be positioned at a very small distance from each other in order to achieve an optimized flow situation in a machine-wide feed chamber, where the individual partial flows from the feed holes (partial flow) can be combined again
However, the risk of clogging is then particularly high and definitely not desirable because of production disturbances

Method used

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  • Curtain application device
  • Curtain application device
  • Curtain application device

Examples

Experimental program
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Embodiment Construction

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

[0024] Such as figure 1 and 2 As shown, the curtain coater comprises a hopper (nozzle body) 1, the upper surface of which forms a feed lip 2 with a sliding mould. The coating medium emerging from the outlet slot 3 flows over the feed lip 2 in order to reach the surface of the paper or board web to be coated, which is moving under the coating device. The outer slot 3 forms the end of a flow channel 6 which discharges the coating medium through the outer slot 3 as a flowing or falling curtain.

[0025] The hopper 1 comprises a machine width feed chamber 14 which extends along the discharge width. This feed chamber 14 provides at least two feed lines 12 which feed coating medium to the (inner) chamber 7 extending along the discharge width. The feed lines 12 each have a devi...

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PUM

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Abstract

A curtain coater for discharging coating medium in the form of a curtain moving substantially under the force of gravity onto a moving paper or board web, comprises a hopper (1), which has a cavity (7) extending along a discharge width, and a flow channel (6) which discharges the coating medium via an outer slot as a curtain, wherein the flow channel (6) is broken down into a large number of individual widening guide channels (6.1 to 6.n) of a diffuser block which, on the inlet side, adjoin a cavity (7) subdivided along the discharge width, at least in some regions, into sections (7.1 to 7.n), each of these sections (7.1 to 7.n) being connected to a feed line (12) and having a pitch which spans a plurality of guide channels (6.1 to 6.n) of the diffuser block.

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 coating machine is known from DE 100 57 733 A1 which comprises a nozzle chamber into which a coating medium flows via a feed duct and which is discharged via a discharge opening as a coating of a curtain or film 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] To form the curtain, a curtain coater (curtain applicator) may be used with a slot-fed type curtain die or a slide-fed type curtain die. In the case of a slot-fed type curtain die (slot-fed die) of a single-layer curtain coater, the curtain is formed directly at the exit from the die gap. Curtain coaters with slot dies are known, for ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05C5/02D21H23/48
CPCB05C5/005B05C5/008B05C5/0279D21H23/48
Inventor 爱德华·达维丹科安德烈亚斯·佩希
Owner ANDRITZ KUESTERS GMBH & CO KG