JPS6259094A - Surface-treating device for metallic web - Google Patents

Abstract

PURPOSE:To enable a web to be stably surface-treated without marring it, by providing a washing water spray for washing the back side of a metallic web or the surface of a rotary drum body on the immediate upstream of a position at which the web is supported by a drum body, and a draining means for draining water from the surface washed with water. CONSTITUTION:An aluminum web 1 having an end part surface-treated and supported by a rotary drum body 9 having a large diameter is subjected to a surface treatment of a central part thereof by a slurry liquid spray nozzle 10. In this case, the surface of the drum and the back side of the web are washed with water by washing water spray nozzles 11, 12 to prevent the back side of the web from being marred, and draining rollers 7, 8 prevent a liquid film from being formed between the drum body 9 and the web 1, whereby the web can be prevented from being moved in either one direction by the force of the spray from the spray nozzle 10. Accordingly, the web can be surface-treated while preventing the web from being moved to one side and preventing the back side thereof from being marred.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an apparatus for surface treatment of metal webs, in particular surface roughening. In particular, the present invention relates to an apparatus for surface treating metal webs, such as aluminum, suitable for the production of supports for lithographic printing plates.

[Traditional proofreading]

Conventionally, planographic printing plates have been so-called PS plates (P
resemsitized Plate), but
The aluminum plate is roughened by various methods.

That is, the surface treatment method for the aluminum plate includes, for example, a mechanical roughening method such as zeal graining, wire dulling, brush graining, liquid honing, an electrochemical roughening method called electrolytic roughening, or Chemical surface roughening methods, methods that combine these surface roughening methods, and the like are used. However, each of these conventional methods has the following problems.

In other words, in the case of zeal grain, a particularly high degree of skill is required and the productivity is significantly inferior, while in the case of wire dale grain, the grain of the surface of the aluminum plate obtained is uneven1, and brush grain t In the case of electrochemical surface roughening, electrolytic conditions must be precisely controlled, power consumption is considerable, and waste electrolyte must be disposed of. In the case of chemical surface roughening, it is not only unsuitable for mass production, but also requires a great deal of expense for waste liquid treatment.

On the other hand, the liquid honing method does not have the above-mentioned drawbacks and is suitable as a continuous method. There was a drawback that the fine abrasive powder was easily stuck and it was easy to get knots.

As a result of repeated research to solve the problems in each of the above-mentioned methods, the inventors of the present invention have discovered that high-pressure liquid is jetted out from a nozzle at high speed, and this jetted flow is combined with fine particles of abrasive material discharged from other discharge holes. A method and apparatus for manufacturing an aluminum support for lithographic printing by combining slurry containing powder and impinging the combined slurry on the surface of an aluminum plate has been proposed. (Japanese Patent Application No. 58-88082, Japanese Patent Application No. 12551-1982, Japanese Patent Application No. 128-228-1982) The present inventors have further discovered that in the above-mentioned liquid honing or slurry jetting method using high-pressure liquid, Japanese Patent Application No. 58-235125 proposed treating the ends and center of the metal web separately to prevent the support of the metal web from being damaged by slurry spraying)
.

There are various types of support for the central part of the metal web.
The drum rotating body is the most stable method among them.

[Problem that the invention seeks to solve]

However, when processing the central part of the metal web, the back surface of the metal web and the surface of the drum rotating body that supports the metal web are contaminated by fine particles of the sprayed slurry abrasive, and the metal web is supported by the drum rotating body. There was a problem in that scratches were generated on the back side of the metal web when the metal web was removed.

As a countermeasure against scratches, it is possible to prevent scratches from occurring on the back side of the web by washing the back side of the metal web and the surface of the drum rotating body with water, but in this case, a liquid film is formed between the drum rotating body surface and the metal web. is formed, and when the jetting direction of the slurry liquid spray nozzle is perpendicular to the direction in which the metal web travels, there is a drawback that the web moves in one direction, either left or right.

SUMMARY OF THE INVENTION An object of the present invention is to provide a surface treatment apparatus that eliminates the above-mentioned drawbacks and can perform surface treatment on a web stably and without causing scratches.

[Means and effects for solving the problem] The present inventors,
In order to achieve the above object, as a result of various studies, it has been found that the above object can be achieved by the present invention described below.

That is, in a metal web surface treatment apparatus in which a continuously running metal web is supported on a drum rotating body and surface treatment is performed by spraying a slurry liquid onto the metal web from a nozzle, the metal web is supported on the drum rotating body. A metal web characterized in that it has a water spray that cleans the back surface of the metal web and/or the surface of the drum rotating body, and a draining means that drains the surface after washing. surface treatment equipment.

Hereinafter, a preferred embodiment of the present invention will be described along with its operation according to the accompanying drawings.

Both edges of the aluminum web 1 are surface-treated in the first treatment area A, and the center of the wafer is treated in the second treatment area B. A part 1 forms a liquid film between the aluminum web 1 and the processing part support roller 2 by a liquid film forming nozzle 5,
An aluminum web 1 is supported on a treatment section support roller 2, and a slurry liquid is sprayed onto the end of the aluminum web 1 from a slurry misspray nozzle 3 using high-pressure water to perform surface treatment. At this time, a grooved rubber roller 4 is used to prevent the roller from slipping or meandering. 14
The edge position control (RPC) sensor f confirms the position of the web, and the hydraulic cylinder adjusts the roller end to match the web end. The liquid film forming nozzle 5 is a nozzle-t' which also has the role of cleaning the surface of the processing section support roller 2. 6 is path C
I - There is a j. After surface treatment of the edges, the aluminum web 1 supported by a large diameter drum rotating body 9'''r%
The center of the web is surface-treated by the slurry liquid spray nozzle 10. At this time, the surface of the drum rotating body 90 is washed with water spray by 11-T%, and as an example of a means for draining the surface of the rotating body after washing, the liquid film is scraped off by a draining roller 8. Also, the drum rotating body 9 is supported by an aluminum support. Immediately before the body 1 is supported, the back surface of the aluminum web 1 is washed with a washing spray nozzle 12''r!, and a draining roller 7 with a nip roller is used as an example of a draining means.
Cut the liquid film on the surface of the aluminum sea urchin f1. The washing spray nozzles 11 and 12 wash the drum surface and the back side of the web to prevent scratches from occurring on the back side of the web, and the liquid film is removed from the drum rotating body by the water draining rollers 7 and 8, as a specific example of the water draining means. By preventing the formation between the web 9 and the aluminum sea urchin f1, it is possible to prevent the web from moving in either direction due to the jetting force of the slurry liquid spray nozzle 10.

The water draining means, which is an important element of the present invention, is not limited to the above-mentioned nip roller type draining roller, but includes air jetting, high-speed suction, sponge suction rollers, and the like.

FIG. 2 is a schematic diagram of the slurry liquid spray nozzle 6°10 used, in which the jet stream from the high aqua regia injection hole 24 is merged with the slurry liquid from the slurry jet port 22, and this combined liquid is collided with the aluminum web. There is one way to perform surface treatment. Figure 3 shows a second
In FIG. 1, the slurry liquid spray nozzles 10 shown in the figure are arranged facing each other with a spraying angle of 45 degrees.

〔Example〕

An experiment was conducted using the steps shown in FIGS. 1 and 3 and the arrangement of the slurry injection port.

(1) Slurry liquid jetting conditions High pressure water pressure 50% Slurry concentration 50% High pressure water flow rate 90 t/M Spraying angle 45°Slurry flow rate
Abrasive material used in 5atZ zone M2O6 (2) Washing spray 11.12 Ejection conditions Working pressure 1
φ Odor flow rate /) QL/ym Under the above conditions, Nitzoroll f draining roll 7.8
up and down, and also turn on and off the water spray 11 and 12.
An experiment was conducted using F. The results are summarized below.

As is clear from the above results, it can be seen that the draining roller 7°8 is effective. In addition, it is effective to add row b to the eight rows of nozzles in order to prevent the bias from occurring, but this is not preferable in terms of energy saving.

[Effects of the Invention] As described above, according to the present invention, the web can be transported stably without shifting of the web and without causing scratches on the back surface, and further improvement in the quality of the surface treatment finish of the metal web can be obtained. Ta.

[Brief explanation of the drawing]

Fig. 1 is a process side view of one embodiment of the metal web surface treatment apparatus of the present invention, Fig. 2 is a vertical cross-sectional view of a slurry liquid spray nozzle used in the present invention, and Fig. 3 is the slurry liquid of Fig. 2. There is a developed view 1 in which spray nozzles are arranged in two rows facing each other. DESCRIPTION OF SYMBOLS 1... Aluminum web, 2... Processing part support roller, 6... Slurry liquid spray nozzle, 4... Rubber roller, 5... Liquid film forming nozzle, 6... Pass roller, 7... Draining roller, 9...Drum rotating body, 10
... Slurry liquid spray nozzle, 11 ... Water washing spray, 12 ... Water washing spray, 13 ... Water washing spray, 21 ... Slurry suction hole, 22 ... Slurry ejection hole, 23 ... High pressure Water suction hole, 24...high pressure water spout hole.

Claims (1)

[Claims] A continuously running metal web is supported by a rotating drum,
In a surface treatment apparatus for a metal web that performs surface treatment by spraying a slurry liquid onto the metal web from a nozzle, the back surface of the metal web and/or the rotation of the drum is removed at a location immediately before the metal web is supported by the drum rotation body. A surface treatment device for a metal web, comprising a washing spray for washing the body surface and a draining means for draining the surface after washing.