JPH10278701A - Method for adhering protecting member to stainless steel molding - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the generation of crack of a colored tape so as to improve the quality of surface by having a first process for adhering a colored tape to an adhesive surface of a colored tape of a unformed stainless steel plate, a second process for forming a stainless steel molding, and a third process for fusing a vinyl chloride protector. SOLUTION: A colored tape 3 is covered on an adhesive surface 1a of a colored tape of a unformed stainless steel (SUS) plate 1, and the colored tape 3 is adhered to the unformed SUS plate 1, and the adhered unformed SUS plate 1 is formed into a roll so as to form a SUS molding 4. The formed SUS molding 4 is heated again, and after the adhesive agent 2, which is adhered to the adhesive surface 1b of the vinyl chloride protector by coating, is activated, fusion vinyl chloride material is adhered to the adhesive surface 1b of the vinyl chloride protector 5 of the SUS molding 4, and hardened, and formed into the shape of the vinyl chloride protector 5. With this structure, generation of crack of the colored tape for covering the surface of the SUS molding is prevented, and generation of trouble such as peeling can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a molding for automobiles, in which a stainless steel plate (hereinafter referred to as a SUS plate) is coated with a coloring tape and a vinyl chloride protector for protecting the surface.

[0002]

2. Description of the Related Art In general, a molding formed of a stainless steel plate (hereinafter referred to as a SUS plate) is provided on a roof portion of a vehicle with a sunroof or the like. This SUS molding has a colored tape on the surface of the SUS plate, for example, a colored tape of the same color as that applied to the outer plate of the vehicle, and a protector formed of vinyl chloride on a portion of the SUS molding to protect the surface. To protect the molding surface.

Conventionally, when a protective member is bonded to such a SUS molding, as shown in FIG. 2, an unformed SUS plate 1 is first heated to 180 to 220 ° C. The adhesive 2 is applied to the position where the colored tape 1 is to be adhered, and the colored tape 3 is put thereon and adhered. Next, the unformed SUS plate 1 is roll-formed with the colored tape 3 adhered thereto, thereby forming the SUS molding 4. On the other hand, the vinyl chloride protector 5 made of a vinyl chloride material is manufactured separately from the SUS molding 4 by extrusion molding.
A double-sided tape 6 is attached to a part of the surface facing the surface of the S molding 4 and the vinyl chloride protector 5 is attached to the SUS molding 4
The crimping method is adopted.

[0004]

As described above, in the conventional method, since the SUS molding 4 is only bonded to the vinyl chloride protector 5 with the double-sided tape 6, the bonding strength is weak, and the SUS molding 4 peels off due to vibration or aging. There was a problem that it was easy. Further, when the molding shape is complicated, it takes a long time to attach the double-sided tape 6, and there is a problem that the number of assembling steps is increased.

Therefore, in order to eliminate such a problem, a method shown in FIG. 3 can be considered. That is, first, the unformed S
With the US plate 1 heated to 180 ° C. to 220 ° C., the adhesive 2 is placed at the position where the colored tape of the unformed SUS plate 1 is to be bonded.
Is applied, and the colored tape 3 is put thereon and adhered.
The unformed SUS plate 1 is roll-formed to form the SUS molding 4. Then, after heating the SUS molding 4 to 160 ° C. or higher, an adhesive 2 is applied to a position where a protector is to be applied, and this is inserted into a mold heated to a constant temperature of an extruder. Then, a vinyl chloride material that has been melted in advance is injected, and the vinyl chloride material is formed into a shape of a vinyl chloride protector 5 and fused to the SUS molding 4.

However, in the step of applying and attaching the adhesive 2 to the SUS molding 4, SU
In order to maintain the adhesive strength of the S molding 4, the SUS molding 4 must be heated to at least 160 ° C.
As a result of repeated experiments using this method, the present inventor found that when the colored tape was heated in a bonded state, the SUS shown in FIG.
It has been found that a new problem occurs in the bent portions A and B of the molding 4, in which the colored tape 3 is cracked by the residual stress of the colored tape 3.

In view of the above, the present invention improves the surface quality by preventing the coloring tape from cracking, and greatly improves the bonding strength as compared with the conventional bonding method, thereby removing the tape. It is an object of the present invention to provide a method for bonding a protective member to a SUS molding, which can prevent the problem described above.

[0008]

In order to achieve the above object, a method of bonding a protective member to a SUS molding according to the present invention comprises heating an unformed stainless steel plate to a predetermined temperature and coloring the unformed stainless steel plate. A first step of applying an adhesive to the tape bonding surface and the vinyl chloride protector bonding surface, and bonding a coloring tape to the coloring tape bonding surface;
A second step of forming a stainless steel molding by forming the stainless steel plate that has passed through the step, and heating the stainless steel molding that has passed through the second step at a temperature lower than the heating temperature of the unformed stainless steel plate, A third step of fusing the vinyl chloride protector.

In the method for bonding a protective member to a SUS molding according to the present invention, the heating temperature of the above-mentioned unformed stainless steel plate can be set in the range of 180 ° C. to 220 ° C. Further, in the method of bonding a protective member to a SUS molding according to the present invention, the heating temperature of the stainless steel molding described above can be set in the range of 80 ° C to 160 ° C.

According to the above configuration, the adhesive applied to the vinyl chloride protector bonding surface of the SUS plate is heated at a high temperature before mounting the vinyl chloride protector on the SUS molding,
After adhering to the SUS plate surface, it will be cured once.
Then, when assembling the vinyl chloride protector to the SUS molding, the adhesive already adhered and cured on the surface of the SUS molding can be reactivated by heating at a relatively low temperature, so that the coloring tape is cracked. In addition to improving the quality of the surface by preventing the adhesion, it is possible to greatly increase the adhesive strength as compared with the conventional adhesive with a double-sided tape, and it is also possible to prevent problems such as peeling.
Further, since the vinyl chloride protector is adhered to the SUS molding by fusing, it is not necessary to use a double-sided tape as in the conventional case, so that even if the molding shape is complicated, it is possible to suppress an increase in the number of assembling steps. it can.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of a method for bonding a protective member to a SUS molding according to the present invention will be described below with reference to FIG. FIG. 1 is a view showing steps relating to a method for bonding a protective member to a SUS molding according to the present invention. (A) of FIG.
In the first step shown in (C), the colored tape 3 is adhered to the unformed SUS plate 1. At this time, first, the unformed SUS plate 1 is heated to 180 ° C. to 220 ° C., and then the adhesive is simultaneously applied to the respective positions of the colored tape bonding surface 1a and the vinyl chloride protector bonding surface 1b of the unformed SUS plate 1. 2 is applied. Next, the colored tape 3 is put on the colored tape bonding surface 1 a of the unformed SUS plate 1 and the colored tape 3 is bonded to the unformed SUS plate 1. Here, it is preferable to use an acrylic adhesive for the adhesive. In order to optimize the adhesive strength of the colored tape in relation to the adhesive, the heating temperature is controlled at 200 ° C. to 220 ° C. Is preferred. In addition, the colored tape is generally
The same color as the outer panel of the vehicle body is selected and used, but a coloring tape different from the outer panel color (including white and black).
Can also be used.

FIG. 1 (D) shows a second step of the method of the present invention. In the second step, the unformed SUS plate 1 (FIG. 1 (C) See)
The SUS molding 4 is formed by roll forming into a predetermined shape. The SUS molding 4 is already at room temperature, and the adhesive 2 bonded to the vinyl chloride protector bonding surface 1b is in a cured or semi-cured state.

Next, in the third step, as shown in FIG. 1E, the molded SUS molding 4 is heated again.
After this heating, the adhesive 2 applied in the first step and adhering to the vinyl chloride protector bonding surface 1b is in a reactivated state, and then the mold is heated to a constant temperature of the extruder. , The SUS molding 4 is inserted, and a pre-melted vinyl chloride material is injected into the mold (not shown), and the molten vinyl chloride material is attached and cured to the vinyl chloride protector bonding surface 1b of the SUS molding 4. Then, it is molded into the shape of the vinyl chloride protector 5. Thus, the vinyl chloride protector 5 is fused to the SUS molding 4.

Here, the heating temperature of the SUS molding 4 is sufficient if it is heated to a temperature at which the adhesive 2 applied in the first step and adhered to the vinyl chloride protector bonding surface 1b can be reactivated. Considering this, in the experiment of the present inventor, the heating temperature should preferably be set in the range of 80 ° C. to 160 ° C. In order to optimize the bonding strength of the vinyl chloride protector 5, the heating temperature is controlled at 120 ° C. to 130 ° C. Is preferred.

According to the above method, the adhesive 2 is applied and adhered to the vinyl chloride protector bonding surface 1b of the SUS plate 1 which has been heated to a high temperature in the first step in advance. The adhesive 2 adhering to the vinyl chloride protector bonding surface 1b can be reactivated only by heating the SUS molding 4 at a considerably lower temperature than the heating in the step 1. Thus, in the method of the present invention,
It is only necessary to apply heat enough to maintain the adhesive strength of the vinyl chloride protector 5, and it is not necessary to consider the adhesive strength of the SUS molding 4. Therefore, heating at a relatively low temperature is sufficient. The temperature can be greatly reduced.

[0016]

As described above, according to the method of the present invention,
By improving the surface quality by preventing cracking of the colored tape covering the surface of the SUS molding and improving the adhesive strength between the SUS molding and the vinyl chloride protector, it is possible to prevent problems such as peeling. In addition, there is an effect that even when the molding shape is complicated, an increase in the number of assembling steps can be suppressed.

[Brief description of the drawings]

FIG. 1 is a view showing a method of bonding a protective member to a SUS molding according to the present invention in the order of steps.

FIG. 2 is a view showing a conventional method of bonding a protective member to a SUS molding in the order of steps.

FIG. 3 is a view showing another example of a conventional method of bonding a protective member to a SUS molding in the order of steps.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Unformed SUS board 1a Colored tape adhesion surface 1b Vinyl chloride protector adhesion surface 2 Adhesive 3 Colored tape 4 SUS molding 5 Vinyl chloride protector

────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] June 25, 1997

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0002

[Correction method] Change

[Correction contents]

[0002]

2. Description of the Related Art Generally, a molding formed of a stainless steel plate (hereinafter referred to as a SUS plate) is provided on a roof portion of an automobile or the like. This SUS molding has a colored tape on the surface of the SUS plate, for example, a colored tape of the same color as that applied to the outer plate of the vehicle, and a protector formed of vinyl chloride on a portion of the SUS molding to protect the surface. To protect the molding surface.

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0015

[Correction method] Change

[Correction contents]

According to the above method, the adhesive 2 is applied and adhered to the vinyl chloride protector bonding surface 1b of the SUS plate 1 which has been heated to a high temperature in the first step in advance. The adhesive 2 adhering to the vinyl chloride protector bonding surface 1b can be reactivated only by heating the SUS molding 4 at a considerably lower temperature than the heating in the step 1. Thus, in the method of the present invention,
It is sufficient to apply only enough heat to maintain the adhesive strength of the vinyl chloride protector 5, and it is not necessary to consider the adhesive strength of the SUS molding 4. Therefore, heating at a relatively low temperature is sufficient, and the heating temperature is higher than in the conventional case. It is possible to lower it.

Claims (3)

[Claims] 1. A method of bonding a protective member to a stainless steel molding, wherein the surface of an automobile molding made of a stainless steel plate is coated with a coloring tape and a vinyl chloride protector for surface protection. A first step of applying an adhesive to the colored tape bonding surface and the vinyl chloride protector bonding surface of the unformed stainless steel plate, and bonding a colored tape to the colored tape bonding surface; A second step of forming a stainless steel plate by forming the stainless steel plate that has passed through the step, and heating the stainless steel plate that has passed through the second step at a temperature lower than the heating temperature of the unformed stainless steel plate. A third step of fusing the vinyl protector. Method of bonding the protective member to the tool. 2. The method according to claim 1, wherein a heating temperature of the unformed stainless steel plate is set to 180 ° C. to 220 ° C. 3. The method according to claim 1, wherein a heating temperature of the stainless steel molding is set to 80 ° C. to 160 ° C.