JPH0315530Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to the structure of an electrode for applying corona discharge treatment to the surface of a molded body made of a thermoplastic resin.

(Prior art) For example, when an automobile bumper is made of a thermoplastic resin such as polypropylene and the surface of the molded object is painted, polypropylene has a property that makes it extremely difficult for paint to adhere to the surface of the molded object. It is known to improve the adhesion of paint by applying corona discharge treatment.

By the way, as disclosed in Japanese Patent Publication No. 60-46133, the apparatus for performing the above-mentioned corona discharge treatment uses a base electrode configured to match the shape of the molded body so as to be able to hold the molded body. and a flexible slat-shaped blind that is vertically disposed such that its lower end is close to or slightly in contact with the surface of the molded body held by the base electrode, and that cooperates with the base electrode to generate corona discharge. It is usually equipped with a reverse electrode.

However, conventional base electrodes are generally constructed using expensive copper, and moreover, a large number of base electrodes must be prepared to suit molded bodies having various shapes, resulting in high costs.

(Purpose of the invention) Therefore, the object of the present invention is to provide an inexpensive base electrode for corona discharge treatment.

(Structure of the invention) The present invention is characterized in that the base electrode is made of a base material made of reinforced plastic with a conductive material layer plated on the surface of the base material through an acrylonitrile-butadiene-styrene resin layer. do.

(Effects of the Invention) The base electrode according to the present invention is made of a base material made of reinforced plastic with a conductive material layer plated on the surface thereof, and therefore has the advantage that the base electrode can be constructed at low cost. Furthermore, since the conductive material layer is plated onto the reinforced plastic base material via the acrylonitrile-butadiene-styrene resin layer, the adhesion between the base material and the conductive material is extremely good.

(Example) An example of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a schematic perspective view showing the state in which the surface of a molded body is subjected to corona discharge treatment using the electrode according to the present invention. 1 is a base electrode, and 2 is a polypropylene film held on this base electrode 1. A molded body (for example, a bumper) is formed of the molded body 2, and numeral 3 is a flexible interdigital reverse electrode that is vertically disposed such that its lower end is close to or slightly in contact with the surface of the molded body 2. Holes 4 are formed in the molded body 2. Base electrode 1
As shown in the cross-sectional view in FIG. 2, an acrylonitrile-butadiene-styrene resin layer (hereinafter referred to as "ABS resin") layer 6 is formed on the surface of a base material 5 made of reinforced plastic (hereinafter referred to as "FRP"). A conductive material layer 7, such as copper, is plated thereon. Above ABS resin layer 6
is provided to facilitate the plating of a conductive material to the base material 5 made of FRP, which is difficult to plate. After forming the ABS resin layer 6 on the base material 5, the surface is treated with sulfuric acid. By ABS
Since the styrene in the resin is dissolved away and the surface of the ABS resin layer 6 is roughened, plating with the conductive material becomes easier.

In FIG. 2, the conductive material layer 7 is not formed on the area 6a of the ABS resin layer 6 corresponding to the hole 4 of the molded body 2, but this is because the base electrode 1 is connected to the opposite electrode during the corona discharge treatment. This is because plating with the conductive material was performed after applying a mask to the region 6a to prevent contact with the region 6a.
Further, the conductive material layer 7 may be plated on the entire surface of the ABS resin layer 6, and the holes 4 of the molded body 1 may be masked during the corona discharge treatment.

As is clear from the above explanation, the base electrode 1 shown in FIG. 2 is constructed by plating the conductive material layer 7 on the surface of the base material 1 made of FRP, so it is different from the conventional one. By interposing the ABS resin layer 6 in the middle of the FRP base material 5, which is inexpensive and difficult to plate, the conductive material layer 7 can be formed extremely easily.

[Brief explanation of the drawing]

FIG. 1 is a schematic perspective view showing a state in which the surface of a molded body is subjected to corona discharge treatment using the electrode according to the present invention, and FIG. 2 is an enlarged longitudinal sectional view thereof. DESCRIPTION OF SYMBOLS 1... Base electrode, 2... Molded body, 3... Reverse electrode, 4... Hole, 5... FRP base material, 6... ABS resin layer, 7... Conductive material layer.

Claims (1)

[Claims for Utility Model Registration] In order to perform corona discharge treatment on the surface of a molded body made of a thermoplastic resin, a base electrode configured to hold the molded body, and a base electrode arranged close to the surface of the molded body are provided. In the electrode for corona discharge treatment, the base electrode includes a reverse electrode that generates corona discharge in cooperation with the base electrode, and the base electrode has a conductive material layer formed of acrylonitrile on the surface of a base material made of reinforced plastic.
An electrode for corona discharge treatment on the surface of a molded body made of thermoplastic resin, characterized in that the electrode is plated with a butadiene/styrene resin layer interposed therebetween.