JPH0478458B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is mainly directed to a vehicle body panel that is attached to a vehicle body component panel such as a dart boat lower panel to prevent the transmission of noise and vibration and to obtain quietness within the vehicle body interior. This article relates to a method for stretching Melsheet.

[Conventional technology]

In the conventional Melsheet installation method, the Melsheet is applied to a predetermined part of the panel, and in order to soften the Melsheet so that it follows the uneven shape of the panel, the entire panel is heated in a near-infrared furnace for a relatively long length. It was heating up for an hour. There was also a method of using an atmosphere furnace, but this required a relatively long heating time.

[Problem to be solved by the invention]

In the conventional method of stretching Melsheet, as mentioned above, in order to soften Melsheet, it was necessary to heat it at a high temperature and over a long period of time (for example, heating at 190°C for 2 hours). . Furthermore, since it takes a considerable amount of time to air-cool the panel, there is a problem in that workability is reduced.

Additionally, the parts without Melsheet were also heated, wasting fuel costs.

Therefore, an object of the present invention is to solve such problems.

[Means to solve the problem]

In order to solve the above object, the present invention brings Melsheet into contact with one side of a panel constituting a part of the vehicle body, and heats the panel by bringing a high-frequency heating coil close to the other side of the panel. At the same time or immediately after, the Melsheet is pressed against the panel using an elastically deformable pressing member to fuse it, and in addition to this structure, a lining plate is brought into contact with the Melsheet, and the lining plate is placed in a spot. It is welded to the above panel, and the whole is heated in a paint drying oven to integrate the lining board, Mel sheet, and panel.

[Effect]

Touch Melsheet to a predetermined area on one side of the panel,
The predetermined portion on the other side of the panel is heated by a high-frequency heating coil, and the Melsheet is pressed and fused to the panel by an elastically deformable pressing member, so that it can be easily bonded even at low heating temperatures. Mel sheet follows the uneven shape of the panel. In addition, thermal efficiency is good because only the contact portion of the Melsheet can be locally heated.

Furthermore, when the Melsheet is first fused to the panel as described above and then the lining board is stacked, the Melsheet will not shift in position until the main heating.

〔Example〕

The present invention will be described below based on illustrated embodiments.

FIG. 1 illustrates a high-frequency heating coil used in the present invention, and the high-frequency heating coil 1, as shown in the figure, is a spiral-shaped Coutan planar coil,
It is formed from a single copper pipe with an outer diameter of about 5 to 12 mm, preferably about 8 mm. Both ends 2, 2 of the coil 1 are connected to an oscillator 3. The oscillator 3
The frequency of is about 3KHz and has a transformer. Further, the coil 1 is insulated from a panel 4 (see FIG. 5) constituting a part of the vehicle body, which is an object to be heated, and is embedded in an insulator 5 so as to follow the shape of the panel 4. . In addition, winding glass tape around coil 1,
Alternatively, the coil 1 may be further coated with Teflon and a portion of the coil 1 may be fixed with an Oaken core. Further, a coolant such as water flows inside the coil 1, and the coolant cools the coil 1.

FIG. 2 shows a pressing member used in the present invention,
The pressing member 6 is made of urethane foam, elastically deformable heat-resistant rubber, or heat-resistant plastic, and has a dense outer surface integrally made of the same material. As a result, the asphalt-based Melsheet 9 is pressed against the panel 4. Further, in order to make the contact surface 7 of the pressing member 6 follow the uneven shape of the panel 4, the corresponding contact surface 7 is formed with uneven portions 8 that follow the above-mentioned uneven shape. In order to form this uneven portion 8, if the abutting portion of the target panel 4 is used for foam molding, an accurate uneven shape can be easily obtained. Further, in order to prevent the uneven portions 8 from losing their shape, the corresponding contact surface 7 is formed densely with the above-mentioned dense skin portion.

As shown in FIG.
The mel sheet 9 is brought into contact with a predetermined portion of one surface 11 of the panel 4, and the coil 1 is brought close to the predetermined portion of the other surface 12 of the panel 4. The distance T between the panel 4 and the coil 1 is approximately 3 to 10 mm, preferably approximately 5 mm. Next, the pressing member 6 lightly presses (pre-pressures) the Mel sheet 9, and as shown in FIG. Immediately thereafter, the Melsheet 9 is pressed onto the panel 4 by the pressing member 6 (main pressure) to fuse it. At this time,
The time for the above-mentioned high-frequency heating may be a few seconds, and the fusion temperature may be set in the range of approximately 110°C to 180°C, but approximately
Preferably around 130℃. In addition, the main pressure is 1Kg/cm ²
The following is sufficient. Then, the panel 4 is air-cooled, and as shown in FIG. 5, the Mel sheet 9 is integrally fused and stretched on the panel 4.

FIG. 6 shows another embodiment, and after the process of the previous embodiment is completed, the melt sheet 9 is fused to the state shown in FIG. , a lining plate 13 called a restraining steel plate formed to follow the unevenness is brought into contact with the lining plate 1
The end edges 14, 14 of 3 and appropriate positions (it is desirable to provide a through hole in the melt sheet in advance and provide a convex spot welded part in the lining plate 13) are welded to the panel 4 by spot welding. Then, the entire body is heated in a drying oven (so-called main heating) for subsequent painting of the entire car body, and the lining board 13, Melsheet 9, and panel 4 are integrated.

Note that the present invention is not limited to the above-described embodiments, and design changes may be made without departing from the gist of the present invention. For example, as a method for continuously stretching the Mel sheet 9, the coil 1 and the pressing member 6 may be installed at fixed positions on the line and the panel 4 may be moved, or conversely, the panel 4 may be fixed and the coil and pressing member 6 may be set at fixed positions on the line. The member 6 may be moved. In addition, in Fig. 5, panel 4 is the lower panel of the dart board, and the central Mel seat 9 blocks engine noise, and
The left and right Melsheets 9, 9 block noise from the tires, but the Melsheets 9 may be applied over substantially the entire surface of this panel.

〔Effect of the invention〕

Since the present invention is configured as described above,
It produces the remarkable effects described below.

Melsheet 9 is fused to panel 4 by high-frequency heating coil 1, and Melsheet 9 is pressed against the panel by elastically deformable pressing member 6, so Melsheet 9 is bonded to panel 4 even at low heating temperatures. Welds reliably along the uneven shape. Therefore, it is recommended to apply Melsheet 9 to sloped and vertical surfaces such as the lower panel of the car body and the left and right sides.
This is useful for preliminarily fixing the material so that it does not shift. Further, since only the contact area of the Mel sheet 9 can be locally heated, thermal efficiency is good. Moreover, since it is high-frequency heating, it only needs to be heated for a very short time (several seconds), and since the heating temperature is low, air cooling time is not required, improving work efficiency. Furthermore, since the heating temperature is low and short, the panel 4 is less likely to rust.

In the second aspect, since the lining board 13, the Melsheet 9, and the panel 4 are integrated, a more reliable soundproofing effect can be obtained.

[Brief explanation of the drawing]

Figure 1 is a cross-sectional plan view of the high frequency heating coil, Figure 2 is a cross-sectional plan view of the high frequency heating coil.
The figure is a sectional view of a pressing member, FIGS. 3 and 4 are sectional views showing one embodiment of the present invention, FIG. 5 is a plan view of a panel, and FIG. 6 is a sectional view showing another embodiment. . 1... High frequency heating coil, 4... Panel, 6...
...Press member, 9... Melsheet, 11... One side,
12...Other surface, 13...Lining board, 14...Edge portion.

Claims (1)

[Claims] 1 Melsheet 9 is brought into contact with one side 11 of a panel 4 that constitutes a part of the vehicle body, and the high-frequency heating coil 1 is brought close to the other side 12 of the panel 4 to heat the panel 4. A method for stretching Melsheet, which is characterized in that the Melsheet 9 is pressed and fused to the panel 4 using an elastically deformable pressing member 6 at the same time or immediately after heating. 2. Melsheet 9 is brought into contact with one surface 11 of a panel 4 that constitutes a part of the vehicle body, and the high frequency heating coil 1 is brought close to the other surface 12 of the panel 4 to heat the panel 4, and at the same time or immediately after the heating. , the Melsheet 9 is pressed and fused to the panel 4 using the elastically deformable pressing member 6, the lining plate 13 is brought into contact with the Melsheet 9, and the lining plate 13 is spot-welded to the above-mentioned panel 4. Weld it to the panel 4, heat the whole thing in a paint drying oven, and then combine the lining board 13, Melsheet 9, and panel 4.
A method for stretching Melsheet characterized by integrating the following.