JPS61113945A - Reinforcement of metal panel - 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 the Invention The present invention relates to an improved method for joining reinforcing materials by employing an adhesive method instead of stud welding, thereby reducing work time 2 and eliminating welding dents.

(Ae, iron, stainless steel, etc.) is manufactured by performing stud welding such as spot welding with a metal U-shaped reinforcing material. However, stud welding has problems such as poor workability and poor surface finish due to welding marks on the finished product, and improvements are desired.

An object of the present invention is to provide a method for reinforcing a metal panel by reinforcing the back surface, which is easy to work with and has a good finished appearance.

As a result of intensive studies to achieve this objective, the present inventors omitted the stud welding described above and instead bonded the metal panel and the reinforcing material with a redox-reactive acrylic structural adhesive. We discovered that it maintains the same strength as stud welding, and has a better surface finish.
The present invention has now been completed.

That is, the present invention provides a method for reinforcing a metal panel, which comprises adhesively bonding a metallic corner-shaped reinforcing material to the back surface of the metal panel using a reactive acrylic structural adhesive. It is something.

Structure and Effects of the Invention The reinforcing metal panel of the present invention is used for external wall panels of buildings, floor panels of ferries, bridge panels, etc., and in particular, the metal panel is difficult to handle when handling thin metal plates,
Usually 177? Since there is a problem with panels having the above area and thickness of 1 to 3 cm being deformed by external stress, a U-shaped reinforcement O is joined from the back side to suppress deformation due to external stress. The reinforcing material is a U-shaped square material.
It has a width of 5 to 10 ff and a horizontal length of 3 to 3 as, and its back portion is adhesively bonded to a metal panel.

As the acrylic structural adhesive in the present invention, redox-reactive acrylic adhesives that are generally applied to structures such as metals, synthetic plastics, glass, and ceramics may be used (Japanese Patent Publication No. 53-4526). Public notice,
Special Publication No. 53-24103 Publication S No. 50-35
231), specifically a, a mixture of methyl methacrylate and styrene partially polymerized in the presence of polychloroprene, b, methacrylic acid 2 and C, acrylate polymer 1 polymer (DJ-f-IVj 971J
'-1-Solution'z;
(See Publication No. 26). Such an adhesive is commercially available, for example, under the trade name "Toughlock J" manufactured by Sunstar Giken Co., Ltd.

The metal panel reinforcing method according to the present invention is characterized by employing adhesive bonding using the adhesive described above instead of conventional stud welding, and the steps of the adhesive method will be explained below.

8 in the attached drawings, Figure 1, 1.0m wide, 2.5. m length,
Remove dirt from the adhesive part of a 1.5 m thick metal panel (metal coated steel plate) 1, apply a primer, and dry for 10 minutes or more. After that, a redox-reactive acrylic structural adhesive (Toughlock Nct620 manufactured by Sunstar Giken Co., Ltd.) was applied.
1) Set up the base resin/curing agent = 25/1.2511 in step 2, mix the base resin and the hardener for 15 to 20 seconds, and adhere the reinforcing material described later in the length direction of the metal panel 1. Place 2 to 3 g of each at approximately equal intervals in the center, and add U-shaped reinforcement material (back portion 3) coated with synchro paint to prevent rust.
Near Qzx, rising part 4:50 order, sode part 52 15H1
: (Total length 2.4m, thickness 3u) 6 back part 3 with adhesive 2
The metal panel 1 and the reinforcing material 6 are placed on top of each other, and the bonding process is performed for 15 minutes while applying a load of 40 kg so that no floating occurs between the metal panel 1 and the reinforcing material 6, which is necessary for the adhesive 2 to harden.

On the surface of the metal panel reinforced in this way, there was no distortion that would result in welding marks, and the appearance finish was good. It was found that the reinforcing material did not peel off even when the reinforcing material was used, and that it could withstand a load of 300 kg/cy1 or more, which is normally required. In addition, even after 30 days of expansion and contraction deformation in the heating experiment, there was no sign of peeling at all.

As described above, it has been recognized that the reinforcing method of the present invention, in which a reinforcing material is adhesively bonded to a metal panel using a specific adhesive, is less complicated than conventional welding work and has excellent workability. Moreover, there are no welding marks on the surface finish of the metal panel.
Outside 1 is also excellent. Furthermore, it is comparable to metal panels reinforced by welding and can be put into practical use.

[Brief explanation of the drawing]

Figure 3 is a perspective view showing an example of a metal panel reinforced by the method of the present invention. 1...Metal panel, 2...Adhesive, 6...
Reinforcement material.

Claims (1)

[Claims] 1. A method for reinforcing a metal panel, which comprises adhesively bonding a metal U-shaped reinforcing material to the back surface of the metal panel using a redox-reactive acrylic structural adhesive.