JPS60155698A - Method for partially electrolyzing steel sheet - Google Patents

Abstract

PURPOSE:To obtain a partially plated steel sheet at a low cost by impregnating an electrolytic soln. into arbitrarily shaped felt stuck to an electrically conductive roll and by pressing the roll on a steel sheet to be plated to carry out plating. CONSTITUTION:A shell consisting of arbitrarily shaped felt 3 at necessary positions and a flexible insulating material 4 at the other part is stuck to the outside of an electrically conductive roll 2. The outside of the roll 2 is dipped in an electrolytic soln. 5 as a plating soln. to impregnate the soln. 5 into the felt 3, and the impregnated felt 3 is pressed on a traveling steel sheet 1 to be plated to carry out electroplating. Thus, a partially plated steel sheet is obtd. at a low cost.

Description

[Detailed description of the invention] [Industrial application field] The present invention uses Zn and Sn in arbitrary patterns on a steel plate.

The present invention relates to a partial electrolytic treatment method for plating metal such as Ni.

[Background technology]

Recently, the use of fully plated steel plates for the parts that are often painted among automatic motorcycle body materials, such as the character line neck parts of the door JP7 ender parts, has been used to save resources and reduce costs, and after painting. Since this is unfavorable from a quality standpoint, it has been considered to use a so-called partially plated steel plate, in which only the necessary areas are surface-treated and the remaining areas are not plated. □--Japanese Patent Application Laid-Open No. 54-64028 is a patent publication that discloses such a technique.

This technique is a one-sided partial hot-dip plating method in which a copper band guide roll, the lower part of which is immersed in a hot-dip plating bath, is divided in the width direction to make it movable. This method requires the use of various copper strip guide rolls depending on the required plating pattern, which increases the production cost of the rolls, and also has the drawback of being inflexible and variable in terms of arbitrary patterns. .

Furthermore, there is also the drawback that the shape of partial plating lacks accuracy due to the problem of conformity of the hot-dip plated metal up to the point of solidification.

On the other hand, in the automobile industry, electroplated steel sheets are currently being mainly used, and this is because the workability of the original plate is maintained after plating, and the corrosion resistance required by the small amount of alloy plating suitable for electroplating. This is because I have become sexually satisfied.

[Purpose of the invention]

In view of the manufacturing technology of such partially plated steel sheets, the present invention provides an electroplating method that allows partially plated steel sheets to be obtained at low cost.

[Structure of the invention]

The gist is that the ink with the required plating pattern in the required position.
This is a partial electrolytic treatment method for a steel plate in which electroplating is carried out by pressing a running steel plate against a running conductive roll surrounded by an outer shell made of liquid-impregnated felt and other parts laminated with a combustible insulating material.

The present invention will be described in detail below with reference to the drawings.

[Embodiments of the invention]

FIG. 1 is a sectional view of a partial electrolytic treatment apparatus for implementing the present invention, and FIG. 2 is a perspective view of a conductive roll.

In Fig. 1, numeral 1 denotes a steel plate to be plated, which runs continuously. 2 is a conductive roll. The conductive roll 2 has an electrolyte-impregnated fell (3Y) on its outer periphery that performs electrolytic treatment to form the required plating pattern on the required positions of the steel plate to be plated, and other important parts are made of flexible insulating material 4 such as rubber or plastic.
7 It is constructed by bonding and surrounding it with an appropriate thickness. 5 is a plating solution. The conductive roll 2 is partially immersed in the plating solution 5 in the pan 6.

Therefore, an electric circuit is completely connected between the steel plate 1 to be plated and the conductive roll 2 through a local part of the felt 3 that is close to the outer periphery of the conductive roll and an outer skin made of a flexible insulating material 4 such as rubber or plastic. Formed and electrolytically treated.

Since the felt 3 is wetted with the plating solution, electricity is applied only to that part, and only that part of the steel to be plated is electrolytically treated. Other parts made of flexible insulating materials such as rubber and plastic are not electrolytically treated because the conductive roll 2 is in close contact with the steel plate 1 to be plated and no leakage current flows therethrough.

As described above, in the present invention, only the electrolyte-impregnated felt 3 can be formed into a desired pattern to create a partial pattern of various patterns. wo111
'I can simply do it.

By arranging one or more electrically conductive rolls having such an outer skin in series, arbitrary patterns and arbitrary types of partial electrolytic treatment can be performed. When a plurality of felt patterns are arranged, if the current roll and the next roll have different felt patterns, the product will have an overlapping pattern. This is true even if the type of electrolyte in the current roll and the next roll are different. Furthermore, even with the same plating solution, if the plating vt solution capacity applied to the roll is different, partial electrolytic treatment can be performed with an arbitrary deposition amount. Therefore, in the present invention, any pattern, any adhesion, any type of surface treatment can be electrolytically treated in a single layer or in multiple layers. By employing this method, it is possible to perform standard plating in any number of stages, and also to perform unusual multilayer plating.

Historically, the present invention is not only compatible with electric metal plating, but also allows for post-processing such as electrolytic chromate treatment and electrolytic rounding treatment to create arbitrary patterns. The first method of impregnating felt with plating solution is
In addition to the method shown in the figure, there are other methods that can be considered, such as making the conductive roll hollow and providing a number of through holes on its circumference to allow the plating solution to overflow from the inside and make it wet, or directing the plating solution onto the outer skin. It will be done.

Next, specific examples of embodiments of the present invention will be explained.

In the Metsugyusouhoki shown in Figure 1, electrolyte-impregnated felt with a thickness of 3U and rubber Y are used as the flexible insulating material, and Z
a 804.7) ho 350 j? /l.

Zn plating was performed using an electrolytic plating solution of Na2SO4B511/l. As a result, Zn plating with the desired plating pattern was clearly partially plated on the steel plate to be plated.

〔Effect of the invention〕

As explained above, the method for partially electrolyzing a steel plate according to the present invention has the effect that a partially plated steel plate can be obtained at low cost.

[Brief explanation of the drawing]

The drawings show an example of an apparatus for carrying out the method of the present invention, in which Fig. 1 is a sectional view of the partial electrolytic treatment apparatus, and Fig. 2 is a perspective view of a conductive roll surrounding an outer skin. 1... V plate to be plated, 2... Conductive roll, 3... Electrolyte impregnated felt, 4...
...Flexible insulating material, 5...Plated armpit, 6...
...Rison. Agent: Patent attorney Masaaki Akizawa, Mitsugai (2 people)

Claims (1)

[Claims] +11 Electrolyte-impregnated felt with the required plating pattern at the required position and other parts are surrounded by a skin made of a flexible insulating material, and a conductive roll is pressed against the running steel plate to plate it. A method for partial electrolytic treatment of steel sheets, characterized by