DE102007003002A1 - Drying unit for printing machine, has temperature conditioning device tempering steam in drying chamber to preset temperature, where chamber filled with over-heated steam is conducted for drying printing substrate - Google Patents

Abstract

The machine has a drying chamber (10), through which a printing substrate (11) to be dried is movable. A steam generator (12) produces steam (16), where the drying chamber is filled with the steam. A temperature conditioning device (13) is assigned to the drying chamber and tempers the steam in the drying chamber to a temperature of about 100 degree celsius. The drying chamber, which is filled with over-heated steam, is conducted for drying the printing substrate. An independent claim is also included for a method for drying a printing substrate.

Description

The The invention relates to a drying device of a printing press according to the preamble of claim 1. Furthermore, the Invention a method for drying a printed substrate according to the preamble of claim 6.

One in a printing machine with printing ink and / or paint printed substrate must provide a stable connection between the substrate and the printing ink and / or the paint subjected to drying become. In principle, a distinction is made between physical drying processes as well as chemical drying methods. The physical drying methods include in particular the infrared drying and the evaporation drying. To chemical Drying process counts in particular the ultraviolet drying.

The The present invention relates to a drying device of a Printing machine based on the principle of evaporation drying, in which case liquid Components of the ink applied to a substrate and / or of the paint applied to the printing material are converted into a vaporous state. This is done in known from the prior art drying equipment in that dry hot air is blown onto the substrate to be dried. This heats up the substrate, which causes liquid Components of the printing ink and / or the paint evaporate and so on be dissipated can. A disadvantage of such dry-air based evaporation drying is in that a relatively long drying distance is required, whereby the constructive structure of a printing machine is extended.

Of these, Based on the present invention, the problem is based a novel drying device of a printing press and a novel process for drying a printed substrate to accomplish.

This Problem is solved by a drying device according to claim 1 solved. According to the invention the drying device a steam generator that generates water vapor, wherein the drying chamber with the steam generated by the steam generator fillable is, and one of the drying chamber associated tempering, the water vapor in the drying chamber to a Temperature of at least 100 ° C tempered, wherein the same for drying the printed substrate through the overheated water vapor filled Drying chamber is conductive.

in the The meaning of the present invention is a printed substrate dried by the fact that the substrate by a superheated steam filled Drying chamber is moved, wherein the superheated steam a Temperature of at least 100 ° C having. This allows a particularly fast and effective drying the printed ink applied to a printed substrate as well implemented on the printed substrate applied paint become. about the temperature of the water vapor can adjust the drying performance become. It is possible, to shorten the design of a drying device.

The inventive method for drying a printed substrate is defined in claim 6.

preferred Further developments of the invention will become apparent from the dependent claims and the following description. An embodiment of the invention is without limitation to be closer to the drawing explained. Showing:

1 : A schematic representation of a drying device according to the invention of a printing press.

The The present invention relates to a drying device of a Printing machine for drying a printed with ink and / or varnish Printing fabric. This may be the drying device of a Sheet press and a web press act.

1 shows very schematically the construction principle of the drying device according to the invention, wherein the drying device according to the invention a drying chamber 10 comprises, by a to be dried, printed with ink and / or paint substrate 11 can be moved.

The drying device according to the invention has a steam generator 12 that made water 14 as well as heat 15 Steam 16 generated. The drying chamber 10 the drying device according to the invention is with that of the steam generator 12 generated water vapor 16 fillable.

The drying device according to the invention also has a tempering device 13 that in the drying chamber 10 tempered water vapor to a temperature of at least 100 ° C. The tempering device 13 accordingly, in the drying chamber 10 overheated steam ready.

For drying the printed substrate 11 the same is due to the overheated water vapor 16 filled drying chamber 10 be conducted. This results in a rapid and effective heating of the printed substrate and evaporation of liquid components of the ink and / or the paint.

The tempering device 13 is preferably designed as a heat exchanger and in the drying device 10 integrated.

The condensate formed during drying of the printed substrate 17 is about one in the drying chamber 10 integrated opening from the same dischargeable.

As already stated, tempering the temperature 13 the water vapor to a temperature of at least 100 ° C. Preferably, the temperature of the superheated steam is between 100 ° C and 200 ° C. The upper limit is determined by the thermal resistance of the substrate.

The Temperature of the overheated Steam determines the drying performance of the drying device according to the invention.

10

drying chamber

11

substrate

12

steam generator

13

tempering

14

water

15

warmth

16

Steam

17

condensate

Claims (8)

Drying device of a printing press, with a drying chamber ( 10 ), through which a printed substrate to be dried ( 11 ) is movable, characterized by a steam generator ( 12 ), the water vapor ( 16 ), wherein the drying chamber ( 10 ) with the steam generator ( 12 ) generated water vapor ( 16 ) and through one of the drying chamber ( 10 ) associated tempering device ( 13 ) in the drying chamber ( 10 ) tempered to a temperature of at least 100 ° C, wherein for drying the printed substrate ( 11 ) by the same with the superheated steam ( 16 ) filled drying chamber ( 10 ) is conductive. Drying device according to claim 1, characterized in that the steam generator, the water vapor from water ( 14 ) and heat ( 15 ) generated. Drying device according to claim 1 or 2, characterized in that the tempering device ( 13 ) formed as a heat exchanger and into the drying chamber ( 10 ) is integrated. Drying device according to one or more of claims 1 to 3, characterized in that formed during the drying of condensate ( 17 ) from the drying chamber ( 10 ) is dissipatable. Drying device according to one or more of claims 1 to 4, characterized in that the tempering device ( 13 ) Tempered the water vapor to a temperature between 100 ° C and 200 ° C. Method for drying a printed substrate, wherein the printing material for drying through a drying chamber a drying device is moved, characterized that the printing material by a filled with superheated steam drying chamber is moved, the overheated Steam has a temperature of at least 100 ° C. Method according to Claim 6, characterized that overheated Steam is heated to a temperature between 100 ° C and 200 ° C. Method according to claim 6 or 7, characterized that during drying drying condensate from the drying chamber dissipated becomes.