JPS587344A - Reinforcing material for reinforcing metallic plate material - 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] The present invention provides a reinforcing ribbon that is adhered to a metal plate material, particularly a metal plate material used for car body exterior panels such as automobile door panels and roof panels, and is foam-cured and integrated with the metal plate material. Reinforcing material for forming.

Conventionally, as shown in Fig. 1 0) (b) f3, a reinforcing material 3 such as glass fiber or nonwoven fabric is attached in advance to the inner surface of a door outer panel 2 that is the outer panel of an automobile door 1, that is, a metal plate 2a. It is known that a plate material is reinforced by pasting a thermosetting resin material 4 on the board and heating and curing the resin material 4 (Utility Model Application No. 101659/1983). In addition, in the figure, 5 is the door inner panel, 6 is the door window sash,
7ti side window glass, 8 is out side door handle.

However, in this conventional example, the desired reinforcing effect cannot be obtained unless the thickness of the resin material 4 is considerably increased, and the amount of resin material used is large, which increases the production cost accordingly. There was also the problem that the weight increased. As another conventional example, it is also known to bond the reinforcing material to the plate material by molding and curing the reinforcing material in advance. However, in this case, it is necessary to mold the reinforcing material so that it perfectly matches the shape of the board, but this type of shaping is difficult, and moreover, the board is usually press-formed, and the shape of the board depends on the conditions of the press process. A problem has arisen in that it is very difficult to completely bond both the reinforcing material and the plate material due to variations in the amount of springback.

Therefore, as shown in FIG. We have previously proposed an automobile plate material in which a reinforcing rib 13 consisting of a thermosetting resin part 11 and a foamed part 12 is integrally formed, and a method for manufacturing the same (Japanese Patent Application No. 114751/1982).
.

According to this proposed invention, all of the above conventional problems are solved.

By the way, in order to form this reinforcing rib 13, FIG.
A reinforcing material 14 as shown in (v) is used. This reinforcing material 14 is an uncured resin in which the reinforcing material 10 is added to an unfoamed foamed material 15 (for example, a band-shaped foamed material such as a foamed polyethylene sheet or a foamed epoxy sheet) that foams when heated. The material 16 (for example, an uncured epoxy sheet) is laminated in advance.

Then, the reinforcing material 14 is attached to the part of the metal plate material 2a that requires reinforcement as shown in FIG. The ribs 13 are firmly formed on the metal plate material 2a.

However, when using such a conventional reinforcing material 14 for reinforcing metal plate materials in an automobile body assembly process, anti-rust treatment such as painting is applied to the reinforcing material 14 as shown in FIG. When the reinforcing material 14 is pasted on the metal plate material 2b that has not been coated, the boundary between the end 17 of the reinforcing material 14 and the electrocoated film layer 181 applied by electrocoating will be removed during electrocoating in the next step. If the paint does not adhere to the boundary portion 19, a minute gap may be created at the boundary portion 19, and the metal plate material 2b may corrode from this portion, eventually resulting in corrosion holes. Therefore, in the process of assembling an automobile body, even if Vc# is used on the metal plate 2b that has not been subjected to anti-rust treatment such as painting, the electrodeposition coating layer 1B applied in the next process of electrodeposition coating It has been desired to develop a reinforcing material that does not create a gap at the boundary 19.

This invention was made by focusing on the above points, and the sealing material is melted and viscous when heated at the edge S of the uncured sheet-like thermosetting resin material constituting the reinforcing material. At the end of
The purpose is to solve the above points by draining the surrounding area and covering the boundary area.

The present invention will be explained below based on the drawings. In the following description, parts that are the same or similar to those of the prior art will be designated by the same reference numerals as necessary, and redundant description will be omitted.

FIG. 5 to FIG. 8 are diagrams showing an embodiment of the present invention. This reinforcing material 20 mainly consists of an uncured sheet-like thermosetting resin material 21 and an unfoamed sheet that is integrated with the resin material 21 by leaving an adhesive part 23 on one side 22 of the resin material 21 to the metal plate material 2b. and the resin material 21.
A sealing material 26 is integrally joined to the end portion 2SK.

The uncured sheet-like resin material 21 constituting the reinforcing material 20 is preferably a thermosetting epoxy resin material, but is not limited thereto. Melamine-based, phenol-based, urea-based resins, and other resin materials may be used as long as they cure at 180° C. and are flexible, sticky, and adhesive at room temperature. Note that these resin materials 21 lack adhesiveness and adhesiveness at room temperature, or have weak adhesiveness and adhesiveness.
In this case, it is also possible to add a material with high adhesiveness and adhesion properties in advance to one side surface 22 corresponding to the metal plate material 2b.

Examples of thermosetting epoxy resin materials include bisphenol A type epoxy resins Epicortona 828 and 1004 (both manufactured by Yuka Shell Co., Ltd.) mixed with thermoplastic polyester resin Vylonna 500 (Toyobo Co., Ltd. is the shrimp coata 82B
, Bratamide I, a copolymerized nylon resin, to 1004
(105F (Nippon Rilsan Co., Ltd.) is preferably co-mixed with a curing agent such as dicyandiamide. Similarly, these resin materials 21Fi may be uncured or semi-cured.

This can be achieved by adding glass fiber or other reinforcing material 2T to the surface or surface portion of the resin material 21 in advance. This reinforcing material 21
Glass cloth is suitable as the material, but other materials such as glass fiber, glass fiber nonwoven fabric, carbon fiber, polyester nonwoven fabric, polypropylene nonwoven fabric, kraft paper, etc. may also be used. Furthermore, the reinforcing material 27 can be added to the resin material 21 in any manner, such as in a state where it covers the surface of the resin material 21, or in a state where it is buried in the same surface portion.

In addition, examples of glass cloth include thick 122-kaku,
Weaving density: 19 warp threads/25 threads, 18 threads 725
wn (WF250100N manufactured by Nittobo Co., Ltd.) showed good performance.

The foam material 24 is preferably a foamed epoxy resin sheet, but is not limited to this.
200° C.), foams prior to hardening of the resin material 21, expands in volume at an appropriate rate, has sufficient heat resistance to withstand the baked portion f, and is lightweight. It can be used with any material, regardless of whether it has corroded cells or open cells.

In addition, when using a foamed epoxy resin sheet as a foaming material, for example, its composition is the above-mentioned Ebiko)+1
004, Hiker 0TBN (B, P, Gutdrich Co., Ltd.), which is a carboxylmitrile nitrile rubber, and a dicyandiamide curing agent are added as a foaming agent to an epoxy resin composition, for example, vinylholm x+2 (Eiwa It is best to use Kaseisha Co., Ltd.

As long as the sealing material 26ti is an uncured sheet-like thermosetting resin material whose melt viscosity when heated is lower than that of the resin material 21, the material can be freely selected without being specified by the seal. For example, the resin material 21 is made of epoxy resin and B stage,
Anti-sag agents such as Merck, Asbe, and Inorganic fillers are blended to reduce the viscosity at 60°C to 5oαo o o ape.
If, 'y-le material 15 is epoxy resin,
B stage, viscosity at 80°C [10,000-100.0
You can choose 00cps. Such sealing material 2
Reference numeral 6 is integrally joined to the end portion 25 of the resin material 21 in advance, and it may be joined to the end portion 25 and integrally joined by hand, or it may be simultaneously molded with the resin material 21 and integrally joined. You may let them. The illustrated example shows a case where the sealing material 26 is integrally bonded to the entire "surroundings" of the resin material 21.
It is not limited to this example.

Next, the action will be explained.

As shown in FIG. 8 (6), the reinforcing material 20 is pasted on the part of the metal plate 2b that requires reinforcement, such as the outer door panel of a car, and electrodeposition is applied in this state. When a process of heating to a temperature of .degree. C. to 200.degree.
This mixture 28 seals the periphery of the reinforcing material 20 [FIG. 8(b)]. Then, the resin material 21 is softened by heating while maintaining its sheet shape, and in this state, the foam material 21
4 starts foaming. Then, the reinforcing ribs 13 are formed on the metal plate material 2b, and by further heating, electrodepositing**
The layer 18, the mixture 28 of the electrodeposited coating layer 18 and the low-viscosity sealant 26 is cured while remaining firmly adhered to the metal plate 2'bvC. In this way, a reinforced metal plate material having a sufficient rust-preventing effect is formed.

Figures 9 and 10 (a) @ show other embodiments.

In this embodiment, the sealing material 29 is preliminarily bonded and integrated with the end portion 25 of the resin material 21 in a raised and depressed state. According to this embodiment, when the sealing material 29 melts and flows out by heating, it flows out in a larger amount than in the previous embodiment and mixes with the electrodeposited coating layer 1B, so that the boundary portion 19 is sufficiently covered. It can be coated. As with the previous embodiment, explanations of other configurations and operations will be omitted.

Regarding the cross-sectional shape of the sealing material, for example, from the viewpoint of packaging and handling of this reinforcing material, the one shown in Fig. 6.7 is good, and from the viewpoint of sealing performance, the one shown in Fig. 10 (0) (b) is good. Things are better.

As explained above, according to the present invention, an unfoamed sheet-like foam material is attached and integrated with an uncured sheet-like thermosetting resin material, leaving a part to be attached to a metal plate material on one side of the uncured sheet-like thermosetting resin material. ,
In addition, since a sealing material made of a sheet-shaped thermosetting resin material whose melt viscosity when heated is lower than that of the resin material is integrally bonded to the end of the resin material, this material can be used in the car body assembly process and painting process. When the reinforcing material according to the invention is applied to a metal plate, the boundary between the electrodeposited coating layer and the sealing material, that is, the end of the reinforcing material, is completely sealed, and there is no gap between Km above the metal plate and the outside air is removed. This has the effect of preventing rust from occurring due to contact with the surface. Furthermore, if the sealing material is preliminarily raised in a convex shape and is integrally joined to the end portion, the sealing performance of the boundary portion can be further ensured.

[Brief explanation of the drawing]

Fig. 1 0) shows a front view of a car door showing a conventional example.
The same ←) is a cross-sectional view along the low mouth line of Figure 10), and the same (
c) is a partial perspective explanatory view of Fig. 1 (b), Fig. 2 (support) is a perspective explanatory view of the main part of the door actor panel that has already been proposed as a solution to the conventional example, and the same ←) is the second Arrow 1 in Figure 0)
- Cross-sectional view along line 1, Figure 3 (A) and (B) are Figure 2 ←)
Figure 3 (0) C shows the reinforcing material before it is attached to the metal plate, Figure 5 (B) is a perspective explanatory view of each part after it is attached to the shoulder plate, and Figure 4 The figure is a partially enlarged cross-sectional view when reinforcing ribs are formed on a metal plate, FIG. Figure 7 is an enlarged sectional view along the arrow ■-■ line in the figure, Figure 8 is an enlarged cross-sectional view along the arrow ■-■ line in Figure 5, and Figure 8 0) and ←) are equivalent to Figure 4. Partially enlarged sectional views, Fig. 8 (0) shows before curing, Fig. 8 (b) shows after curing,
- Figure 9 is a perspective view similar to Figure 5 showing another embodiment, Figure 10 (C) is an enlarged sectional view taken along the line x-X in Figure 9, and Figure 10 @ is It is a partial enlarged sectional view similar to 0). 1...Door 2...Door outer panel 21L%21)...Metal plate material 4...Resin material 13...Reinforcement'rep14.20...Reinforcement material 15.24...Foam material 16 .21...Resin material 1T...End of reinforcing material 18...Electrodeposition coating layer 19...Boundary part 25...End of resin material 26.29...Sealing material

Claims (1)

[Claims] A method for reinforcing a metal plate, in which an unfoamed sheet-like foam material is integrally attached to one side of an uncured sheet-like thermosetting resin material, leaving a part to be attached to the metal plate material. Regarding the reinforcing material, □ A sealing material made of an uncured sheet-like thermosetting resin material whose melt viscosity when heated is lower than that of the resin material when heated is integrally bonded to the end of the resin material. A reinforcing material for reinforcing metal plate materials.