Method and apparatus for the application of plastics coatings

A coating and coating technology, which is applied to the device, coating, paper coating and other directions of coating liquid on the surface, can solve the problems of undesired substrate, difficult integration, and inability to apply varnish layer, etc., to improve the smoothing effect, The effect of shortening the moving distance

Active Publication Date: 2010-09-08
ACTEGA SCHMID RHYNER AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the problem here is that such a method cannot be applied to transversely structured varnish layers in which part of the surface coating is left uncoated (partial coating)
[0007] But this is not desirable or possible depending on the substrate, e.g. if the substrate is too hard or if damage is feared
Since in both cases the direction of movement of the substrate is also changed in the device for the targeted influence of the surface of the fluid coating material, this structure is difficult to integrate into existing devices such as printing presses or printing polishing equipment

Method used

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  • Method and apparatus for the application of plastics coatings
  • Method and apparatus for the application of plastics coatings
  • Method and apparatus for the application of plastics coatings

Examples

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Embodiment Construction

[0066] figure 1 An embodiment of a device 1 for coating finishing of printed materials is shown in FIG.

[0067] To this end, a varnish coating is applied by means of the device 1 to the surface 21 of the preferably printed paper or cardboard substrate 2 . For this purpose a transfer device is provided, which in the example shown comprises a roller 11 over which the substrate 2 is moved in the direction of movement 13 , touching at the side 22 , past the coating unit 5 in the form of a painting assembly. The coating unit 5 is controlled by a computer 15 and applies the film 7 of the initially still fluid coating material in the form of a UV-curable coating.

[0068]The coating unit 5 works according to the drop-on-demand principle, wherein the nozzles 51 of the coating unit 5 spray individual droplets onto the substrate surface 21 to be coated in response to a control signal from the computer 15, these droplets forming A continuous film is preferred. The nozzles 51 are arra...

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Abstract

The invention relates to an apparatus for the application of coatings to surfaces of substrates in the form of paper, paperboard, or plastics foils, preferably for the finishing of print products. The apparatus encompasses a coating unit for the application of coating material in fluid form to the substrate surface, and equipment for smoothing of the film while it is still fluid after it has been applied by means of the coating unit to the substrate surface, where the equipment encompasses equipment for generating a gas stream orientated onto the substrate surface coated with the film, where the gas stream smooths the film with at least partial elimination of undesired structures in the film surface, e.g. depressions, elevations and craters, prior to the hardening of the coating material.

Description

technical field [0001] The present invention generally relates to the application of coatings, such as varnishes. In particular, the invention relates to devices and measures for the targeted influence of the surface structure of a film that is still fluid, for example for smoothing an applied coating film. “Smoothness” here means in particular the removal of undesired structures or defects of the layer surface, as will be described in more detail below. Background technique [0002] Due to the method of application of the varnish or the substrate to be coated with the varnish or coating material, the applied coating film may have undesired structures or defects. Such structures or defects may be rolling structures, longitudinal structures passed by rollers, longitudinal streaks of uneven coating, or transfer errors during coating application, etc. [0003] Another cause of surface structural defects may be the substrate. The surface properties of the substrate may cause ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05D1/40B05D3/04B41M7/00B05C11/06
CPCB05C5/02B05D1/40B05D2252/00D21H25/14D21H19/16B05D3/06B41M7/0027D21H25/16B41M7/0045B05C11/06B41F23/08B05D3/0254B05D3/042D21H23/50D21H23/56B05D2203/22B05D5/06D21H25/04
Inventor D·施拉特贝克A·F·塞皮
Owner ACTEGA SCHMID RHYNER AG
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