JPH0321783A - Aluminum frame member for electromagnetic shield glass plate - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an electromagnetic electrode frame used as a ground electrode frame for an electromagnetic shielding glass plate in an electromagnetic shielding glass window of an intelligent building or an outer frame fitted to the outside thereof. The present invention relates to an aluminum frame material for shielding glass plates and a method for manufacturing the same.

In this specification, the term aluminum is used to include its alloys.

BACKGROUND OF THE INVENTION In intelligent buildings and the like, electromagnetic shielding glass windows are used to prevent electronic devices installed indoors from malfunctioning due to electromagnetic induction from outside.

This electromagnetic shielding glass window is, for example, as shown in FIG.
A setting block (50) is disposed within an aluminum outer frame (40) having a U-shaped cross section, and an aluminum earth electrode frame (lO) having a U-shaped cross section is disposed on top of the setting block (50). Two glass plates (20) (20) are coated with sealant (60) in a manner along the frame (IO).
) and spacers (70). The glass plates (20) (20) have special metal coatings (20a) (20) on their outer surfaces, respectively.
0a) is coated, and the metal coating (20a
) (20a) and the ground electrode frame (lO) are in contact with each other in an energized state. On the other hand, the above earth electrode frame (IO
) and the outer frame (40) are conductive powder (3
0), and the earth electrode frame (IO) and the outer frame (40) are electrically connected via the powder (30). Further, the upper part of the powder (30) is filled with a sealant (80) such as a silicone sealant.

Therefore, the special metal coating (20a) (20a) of the glass plate (20) (20) and the outer frame (40) are electrically connected via the earth electrode frame (IO) and the conductive powder (30). It is said that

Problems to be Solved by the Invention By the way, the aluminum frame material used for the earth electrode frame (IO) and the outer frame (40) has excellent corrosion resistance and weather resistance as well as the above-mentioned Metal film (
20a) and the conductive filler (30). Although it is effective to form an anodic oxide film to impart gold resistance, etc., this film impedes electrical conductivity. Therefore, when such a frame material is used, although it can have excellent corrosion resistance, it cannot achieve a grounding effect, and as a result, it does not function sufficiently as an electromagnetic shielding window, which is a dilemma.

The present invention has been made in view of the above-mentioned problems, and is an aluminum for electromagnetic shielding glass plate that can ensure conductivity with the metal coating and/or conductive filler of the glass plate. The purpose is to provide frame materials.

As a means for solving the problem, in the present invention, a coating having excellent corrosion resistance and conductivity is formed on the current-carrying contact surface of the aluminum frame material.

That is, the aluminum frame material for an electromagnetic shielding glass plate according to the present invention can be fitted as a ground electrode frame to the periphery of a glass plate having an electromagnetic shielding metal film, or to the outside thereof with a conductive filler interposed therebetween. An aluminum frame material used as an outer frame, wherein the pore bottoms are dissolved and a barrier layer is substantially formed on at least the electrically conductive contact surface of the frame material with the metal coating and/or the conductive filler. The method is characterized in that a porous anodic oxide film is formed which is removed or made extremely thin, and the pores of the film are filled with a conductive metal.

Example The present invention will be explained below based on illustrated embodiments.

In this embodiment, the present invention is applied to a ground electrode frame (1), which, as shown in Fig. 1, is made of an extruded aluminum material having a U-shaped cross section, similar to the conventional product. However, the only difference is that a special conductive film (1a) is formed on the outer peripheral surface.

As shown in FIG. 2 (c), this film (1a) is formed by dissolving the bottoms of the pores and roughening the surface into an uneven shape.
a porous anodic oxide film (b) having a large number of pores (a) in which the film () has been substantially removed or made extremely thin;
b) and a conductive metal (d) filled in the pores (a). In this way, the anodic oxide film (
The reason why the bottom of the pores in b) is roughened is because the barrier layer (c) at the bottom inhibits conductivity, and therefore the barrier layer (c) is substantially removed or at least It is necessary to make it extremely thin.

The presence of the oxide film (b) ensures corrosion resistance and weather resistance, while the presence of the conductive metal (d) ensures conductivity.

This conductive film (1a) is formed, for example, according to the following procedure.

■ Perform pretreatments such as degreasing, caustic etching, water washing, neutralization, and water washing according to conventional methods.

■ Sulfuric acid solution (preferably 14±2 W/V%: H2so4
, dissolved A base = 15±5g/breath, liquid temperature: about 20±2℃)
Inside, using the frame material (1) as an anode, 1. OA/dbo x 4
Anodic oxidation treatment is performed for about 0 minutes to obtain a porous anodic oxide film (b) having many pores (a) (see Figure 732).
b) see).

■ A chemically soluble sulfuric acid solution (the higher the concentration and temperature, the better; preferably 20±2W/
V%: H2SO4, liquid temperature: about 25 ± 2°C), a constant voltage electrolytic treatment is performed at a low voltage of about IV or less to remove the barrier layer (c) at the bottom of the pores of the oxide film (b). Dissolve and roughen the surface (see Figure 2 (mouth)).

(2) By electrically plating a conductive metal (d) such as copper or tin according to a conventional method, the pores are filled with the metal.

The conductive film (la) is applied to the electrode frame (1) as in this example.
) may be formed on the entire outer peripheral surface of the glass plate (2).
It is sufficient to form it on the current-conducting contact surface between the metal coating (2a) and the conductive filler (3).

Next, the electromagnetic shielding glass window shown in FIG. 1 using the electrode frame (1) will be specifically explained.

A setting block (5) is disposed at the inner bottom of an aluminum outer frame (4) having a U-shaped cross section, and the ground electrode frame (1) having a U-shaped cross section is disposed above the setting block (5). Two glass plates (2) (2) are fitted in a spaced manner so as to be along the opposite wall of the electrode frame (1). A sealing material (6) and a spacer (7) are interposed between the ends of the glass plates (2) (2). Special metal coatings (2a) (2a) are attached to the outer surfaces of both the glass plates (2) (2), and these metal coatings (2a) (2a) and the earth electrode frame (1) are electrically connected. A conductive powder (conductive filler) (3) is filled between the earth electrode frame (1) and the outer frame (4), and a silicone sealant (sealant) (
8) is filled.

The special metal coating (2a) (2a) formed on both the glass plates (2) (2) and the earth electrode frame (1)
) are energized, and the ground electrode frame (1) and outer frame (4) are energized via the conductive powder (3). In particular, in this example, the metal coating (
2a) and the ground electrode frame (1), and the electrode frame (1) and the conductive powder (3) are electrically reliably connected through the conductive film (la) formed on the surface of the electrode frame (1). It is assumed that it will be connected to the

In addition, in the above embodiment, the present invention was applied to the earth electrode frame (1), but the present invention is applicable to the earth electrode frame (1), which is fitted onto the outside of the electrode frame (1) via a conductive filler (3). This also applies to the outer frame (4). In this case, it is necessary to form the conductive film (la) at least on the current-carrying contact surface with the conductive filler (3).

Effects of the Invention As described above, the aluminum frame material according to the present invention has a barrier layer formed by dissolving the pore bottoms at least on the electrically conductive contact surface of the frame material with the metal coating and/or the conductive filler. A porous anodic oxide film is formed in which the metal is substantially removed or made extremely thin, and the pores of the film are filled with conductive metal, so the presence of the oxide film provides corrosion resistance, It has excellent corrosion resistance, and at the same time, the presence of the conductive metal filled in the pores of the film ensures electrical conduction with the electromagnetic shielding metal film and/or conductive filler of the glass plate. . Therefore, it is possible to avoid the disadvantage of not being able to achieve an electromagnetic shielding effect due to poor grounding, which is the case with conventional products.

[Brief explanation of drawings]

Figure 1 shows an embodiment of the present invention, and is a cross-sectional view showing the state of use, and Figures 2 (a) to (c) show the surface portion showing the process of forming a conductive film on the surface of the frame material. The enlarged cross-sectional view, FIG. 3, shows a conventional example, and is a cross-sectional view corresponding to FIG. 1. (1)...Earth electrode frame (frame material), (2)...Glass plate, (2a)...Metal coating for electromagnetic shielding, (3)...
・Conductive filler, (4)...outer frame (frame material), (a)・
... Pore, (b) ... Oxide film, (c) ... Barrier layer, (d) ... Conductive metal. Above←2\lower K return♂《-1' Jl -518-

Claims (1)

[Claims] An aluminum frame material used as a ground electrode frame to be fitted around the periphery of a glass plate having an electromagnetic shielding metal film, or as an outer frame to be fitted to the outside of the glass plate with a conductive filler in between. , a porous anodic oxide film in which the pore bottoms are dissolved and the barrier layer is substantially removed or made extremely thin is formed at least on the current-carrying contact surface with the metal film and/or the conductive filler. Additionally, an aluminum frame material for an electromagnetic shielding glass plate, characterized in that the pores of the film are filled with a conductive metal.