JPH07103219A - Clip-fitting-seat installing method - Google Patents

Abstract

PURPOSE:To provide a clip-fitting-seat installing structure in PPO resin base material stabilizing fitting strength with simple work and moreover making multiple fitting forms possible. CONSTITUTION:The clip-fitting seat 20a of PPO resin base material 20 is compressed to reinforce rigidity, and reactive hot melt 70 is applied to the fitting face of this part. The adhesive property of this reactive hot melt 70 can be therefore used so effectively that the clip fitting seat 20a can be fixed easily and positively without using special adhesive. The conventional sand-blasting work can be thereby disused to shorten manhours, and since there is no dispersion of sand-blasting work, fitting strength is stabilized.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a PPO resin foam layer and a PPO resin layer.
The present invention relates to a method for attaching a clip mounting seat on a PPO resin base material that simply and reliably attaches the clip mounting seat to a PPO resin base material including a PO resin skin layer.

[0002]

2. Description of the Related Art As shown in FIG. 5, the inside of a passenger car has a front door 94, a rear door 95 and a ceiling 96.
Front pillar 98, center pillar 99,
The rear pillar 100 is arranged.

By the way, the recently developed PPO (abbreviation of polyphenylene oxide) resin foam is very lightweight,
And because it has excellent rigidity and heat resistance,
The roof trim 10 of the ceiling 96, the front door 94,
It has attracted attention as a base material for automobile interior parts such as the door trim 101 of the rear door 95.

FIG. 6 shows an automobile roof trim 10 using a PPO resin base material. As shown in FIG. 7, the roof trim 10 has a cloth and pad material laminated on the front surface side of the PPO resin base material 2. The outer skin material 3 is attached.

In the roof trim 10, as shown in FIG. 8, the clip 5 mounted on the clip mounting seat 6 fixed to the back surface of the PPO resin base material 2 is press-fitted into the mounting hole 4a of the roof panel 4. It is attached to the roof panel 4 by combining them. As described above, when fixing the clip mounting seat 6 to the rear surface side of the PPO resin base material 2, as shown in FIG. 7, the PPO is used to widen the head clearance with respect to the roof trim 10 after being mounted on the vehicle body panel.
The mounting portion of the clip mounting seat 6 of the resin base material 2 is compression-molded. Further, since the PPO resin base material 2 has extremely poor adhesiveness to other members, the mounting surface of the clip mounting seat 6 is sandblasted, and then, At present, the clip mounting seat 6 is adhesively fixed to the mounting surface after the instantaneous adhesive is applied. Therefore, the head clearance generated by the height of the clip mounting seat 6 is absorbed by the compression molding of the PPO resin base material 2, and the head clearance for the roof trim 10 after being mounted on the vehicle body panel is secured.

[0006]

However, the above conventional P
According to the method for mounting the clip mounting seat 6 on the PO resin base material 2, the clip mounting seat 6 mounting portion of the PPO resin base material 2 is compression molded at the time of molding the PPO resin base material 2, and as a result, FIG. As shown, there is a problem that the PPO resin base material 2 is restored after the mold is removed and the convex portions 7 are generated on the surface, and the appearance is deteriorated. In addition, the clip mounting seat 6
There is also a problem that the epidermis is likely to fall over during the process of crushing the PPO resin base material 2 of the attachment portion by compression molding, and the appearance becomes poor.

Moreover, according to the conventional method of mounting the clip mounting seat 6, it is necessary to perform sandblasting treatment with sandpaper and application of an instant adhesive on the mounting surface of the clip mounting seat 6, resulting in a large number of man-hours and cost. There is a problem that dust is liable to be attached to the surface of the product particularly in sandblasting, and it takes a lot of post-treatment man-hours, and variation in sandblasting is large, so that the attachment strength of the clip attachment seat 6 is not stable.

The present invention has been made in view of the above problems in the prior art, and an object of the present invention is to enable a variety of mounting forms with a simple operation and stable mounting strength. In addition, the appearance of the roof trim after mounting on the vehicle body panel can be improved P
An object of the present invention is to provide a method for mounting a clip mounting seat on a PO resin base material.

[0009]

That is, according to the method of attaching the clip attaching seat of the present invention, the PPO resin foam layer has P
A clip mounting seat for mounting a clip to be mounted on a vehicle body panel at a predetermined position on the back surface of a PPO resin base material formed with a PO resin skin layer. The reactive hot melt is used as an adhesive medium between the two, and after the molding of the PPO resin base material, the clip mounting seat mounting portion of the PPO resin base material is scraped off with the PPO resin skin layer on the product surface side left, and the scraped part It is characterized in that reactive hot melt is applied to and the clip mounting seat is crimped.

Further, according to the method of attaching the clip attaching seat of the present invention, a clip to be attached to the vehicle body panel is attached at a predetermined position on the back surface of the PPO resin base material formed by forming the PPO resin skin layers on the front and back surfaces of the PPO resin foam layer. In the mounting method of the clip mounting seat, the reactive hot melt is used as an adhesive medium between the PPO resin base material and the clip mounting seat, and the clip mounting of the PPO resin base material is performed after the PPO resin base material is molded. It is characterized in that the seat mounting portion is scraped off with a wire brush while leaving the surface layer, and reactive hot melt is applied to the scraped portion to crimp the clip mounting seat.

The above-mentioned reactive hot melt is obtained, for example, by spraying an accelerator on the hot melt after coating,
However, with simple hot melt, it takes time to completely solidify and the required performance cannot be satisfied, whereas by using reactive hot melt, the time to solidify is shortened,
The required performance can be satisfied. When the PPO resin base material is used as a core material for an automobile body roof trim, it is preferable that the thickness of the PPO resin base material is reduced only in the area corresponding to the mounting area of the clip mounting seat. By doing so, the clip mounting seat mounting portion of the PPO resin base material is scraped off, leaving the surface layer, and reactive hot melt is applied to the clip mounting seat, and when the clip mounting seat is pressure-bonded, the reactive hot melt reaches the back side of the PPO resin base material. It is possible to improve and stabilize the detachment strength of the clip mounting seat in the direction perpendicular to the plane and the diagonal direction by squeezing out and squeezing out the reactive hot melt to the rear surface side of the PPO resin base material.

[0012]

Therefore, according to the method of attaching the clip mounting seat of the present invention, the reactive hot melt is used as an adhesive medium between the PPO resin base material and the clip mounting seat, and after the PPO resin base material is molded, the clip of the PPO resin base material is clipped. Since the mounting seat mounting part is scraped off with the surface layer remaining, reactive hot melt is applied to the scraped part and the clip mounting seat is crimped,
It is not necessary to compress the clip mounting seat mounting portion of the PPO resin base material to secure the head clearance to the roof trim after mounting on the vehicle body panel, and the compression molded PPO resin base material is subsequently bulged to form a convex portion. There is no problem that the appearance of the roof trim is impaired. In addition, since the reactive hot melt is applied to the PPO resin base material at the time of attaching the clip mounting seat, this reactive hot melt acts as an adhesive medium between the PPO resin base material and the clip mounting seat, and the PPO resin The clip mounting seat can be easily and reliably bonded and fixed to the base material.

Further, since the reactive hot melt is used as the adhesive medium, it is possible to use the inexpensive PP resin clip mounting seat. In particular, reactive hot melts are excellent in heat resistance because they are urethane-based hot melts that cure with moisture.
When the PPO resin base material and the clip mounting seat are joined by using such a reactive hot melt as an adhesive medium, the product does not fall off from the vehicle body even if it is heated again. That is, in the case of a normal urethane hot melt, since it is melted by cooling and solidifying it and then applying heat again, the heat resistance is inferior and the joined parts may fall off from the vehicle body in the summer or the like. However, the reactive hot melt is hardened by moisture and does not melt even if heat is applied again, so that it has excellent heat resistance and such a problem does not occur.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a method for mounting a clip mounting seat according to the present invention will be described in detail below with reference to the accompanying drawings. In each drawing, the same parts as those in the conventional example will be described with the same reference numerals.

1 and 2 show an automobile roof trim 10 which is mounted on a vehicle body panel by applying the method of attaching a clip attaching seat according to the present invention, and the automobile roof trim 10 is a PPO.
The resin base material 20 and the skin material 30 integrally attached to the front surface side of the PPO resin base material 20 are generally configured.

Further, the PPO resin base material 20 is made of PP.
The PPO resin skin layer 22 is formed on the front and back surfaces of the O resin foam layer 21.
Is formed, and the PPO resin in this example is pure P
Considering cost and the like, polystyrene is used instead of PO, which is modified by adding polystyrene.

In the PPO resin base material 20, the basis weight of the PPO resin foam layer 21 is 500 to 600 g / m 2, the thickness of the PPO resin skin layer 22 is 0.15 mm, and the total thickness of the PPO resin base material 20 is 3.5 mm. Using the one in the original state, it is heated and softened at 130 to 140 ° C. to expand the total thickness of the PPO resin base material 20 to 6 to 8 mm, and then cold press-formed into a required shape to obtain PPO. It is press-molded so that the total thickness of the resin base material 20 is 5 mm.

On the other hand, as the skin material 30, a material in which a pad material such as polyurethane foam is attached to the back surface side of the cloth is used, and a hot melt film is further laminated on the back surface of the pad material. Therefore, at the time of cold press molding, the skin material 30 is firmly integrated with the surface side of the PPO resin substrate 20 via the hot melt film.

The roof trim 10 is attached to the roof panel 40 via the clip 50. According to the method of attaching the clip attachment seat 60 of the present invention, the clip attachment seat 60 for holding the clip 50 is as follows. Is PPO
It is attached to the resin base material 20.

That is, as shown in FIG. 1, the wire brush 70 scrapes off the clip mounting portion 20a where the clip mounting seat 60 is mounted on the PPO resin base material 20, and the scraped portion is shown in FIG. As described above, the reactive hot melt 80 is applied, and the clip mounting seat 60 is pressure-bonded to the portion to which the reactive hot melt is applied.

Regarding the application of the reactive hot melt 80, when the PPO resin base material 20 is cold press molded, the heat softened PPO resin base material 20 is set in a cold press molding die (not shown). The clip mounting portion 20a of the PPO resin base material 20 that has been molded and then taken out of the mold is scraped off by the wire brush 70, the hot melt 80 is evenly applied to the scraped off portion, and the accelerator is applied to the applied hot melt 80. By spraying, the reactive hot melt can be easily applied. The above reactive hot melt 80 is obtained by reacting methylene diisocyanate with a polyhydric alcohol and adding water (secondary amine 10
% Dissolved aqueous solution becomes the accelerator. ) Reacts with each other to form a urea bond, thereby exhibiting adhesiveness.

As described above, the clip mounting seat 6 according to the present invention is used.
According to the mounting method of No. 0, the clip mounting portion 20a of the PPO resin base material 20 is scraped off with a wire brush, and the reactive hot melt 80 is applied to the mounting surface of the scraped portion. The adhesiveness can be effectively used, the clip mounting seat 60 can be easily and surely fixed, and the roof trim after mounting the clip mounting seat also has a good appearance. Further, the conventional sandblasting work can be eliminated, the man-hours can be shortened, and the mounting strength is stable because there is no variation in the sandblasting work.

Further, it becomes possible to use a low-priced clip mounting seat such as a PP resin clip mounting seat having poor adhesion.
It is possible to apply various variations to the mounting form, and the practical value is extremely high. 3 and 4 show a method of mounting a clip mounting seat according to another embodiment of the present invention. In this embodiment, as shown in FIG. 3, the thickness of the PPO resin base material 20 is set to the mounting area of the clip mounting seat 60, that is, the roof. Only the area A corresponding to the rear area of the trim is thinned and
The clip mounting seat mounting portion of the resin base material 20 is scraped off, leaving the surface layer, reactive hot melt 80 is applied thereto, and the clip mounting seat 60 is pressure-bonded, so that P
The reactive hot melt 80 protrudes to the back surface side of the PO resin base material 20. In this way, by protruding the reactive hot melt 80 to the back surface side of the PPO resin base material 20, it becomes possible to improve and stabilize the detachment strength of the clip mounting seat 60 in the perpendicular direction and the oblique direction.

[0024]

As described above, according to the method of mounting the clip mounting seat of the present invention, the clip mounting seat mounting portion of the PPO resin base material is scraped off leaving the surface layer, and the reactive hot melt is applied thereto to apply the clip mounting seat. By crimping, the following effects can be obtained. (1) Since the clip mounting seat mounting portion on the rear surface of the PPO resin base material is not crushed during molding, a product such as a roof trim, which does not have a surface convex portion or a phenomenon such as a fall of epidermal hair, which does not spoil the appearance. (2) When the present invention is applied to the mounting of the blind clip of the roof trim Since the mounting position of the blind clip approaches the front side of the roof trim, the head clearance with respect to the roof trim after mounting on the vehicle body panel is increased to increase the vehicle interior space. It becomes possible to widen. (3) Since the PPO foam layer does not exist in the clip mounting seat mounting portion, even if the clip mounting seat portion is pushed in when the vehicle body is mounted, a phenomenon such as a dent or the like that does not spoil the appearance does not occur. Further, according to the method of attaching the clip attachment seat according to the present invention, the following special operational effects are exhibited.

(4) According to the present invention, the conventional sandblasting process can be eliminated by using the reactive hot melt as the adhesive medium between the PPO resin base material and the clip mounting seat, and the number of mounting steps can be greatly increased. Since it can be significantly reduced, it has an effect of significantly reducing the cost.

(5) According to the present invention, since the reactive hot melt is used as the adhesive medium between the PPO resin base material and the clip mounting seat, the sandblasting work is abolished and there is no variation in the sandblasting work. The effect is that stable mounting strength of the clip mounting seat can be obtained.

(6) According to the present invention, since the reactive hot melt is used as the adhesive medium between the PPO resin base material and the clip mounting seat, the inexpensive clip mounting seat made of PP resin having poor adhesiveness is used. It can be used, and the clip mounting seat can be integrally joined to the PPO resin base material by ultrasonic welding, so that various variations can be given to the materials used and the mounting form. (7) In particular, according to the present invention, since the reactive hot melt is used, the reactive hot melt is a urethane-based hot melt that is moisture-curable, so that it has excellent heat resistance and does not melt even if heat is applied again. When the PPO resin base material and the clip mounting seat are joined using such a reactive hot melt as an adhesive medium, the product does not drop off from the vehicle body.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of an automobile roof trim showing a process of an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a state in which a clip mounting seat is attached to the roof trim shown in FIG.

FIG. 3 is a cross-sectional view of a roof trim to which another embodiment of the present invention is applied.

FIG. 4 is a cross-sectional view showing a state in which a clip mounting seat is attached to the roof trim shown in FIG.

FIG. 5 is a perspective view showing the overall appearance of the interior of a passenger car.

FIG. 6 is a perspective view of a roof trim to which the present invention is applied.

FIG. 7 is a cross-sectional view of a roof trim showing a mounting process by a conventional clip mounting seat mounting method.

FIG. 8 is a cross-sectional view showing a mounting state of a clip mounting seat by a conventional mounting method.

[Explanation of symbols]

 10 Automotive roof trim 20 PPO resin base material 21 PPO resin foam layer 22 PPO resin skin layer 30 Skin material 40 Roof panel 50 Clip 60 Clip mounting seat 70 Wire brush 80 Reactive hot melt layer

Claims (4)

[Claims] 1. A PPO resin foam layer (21) has P on the front and back surfaces thereof.
A clip mounting seat (6) for mounting a clip (50) fitted to a vehicle body panel (40) at a predetermined position on the back surface of a PPO resin base material (20) formed with a PO resin skin layer (22).
In the method of mounting the clip mounting seat for mounting 0),
A reactive hot melt (80) is used as an adhesive medium between the PPO resin substrate (20) and the clip mounting seat (60), and the clip of the PPO resin substrate (20) is formed after the PPO resin substrate (20) is molded. A mounting method of a clip mounting seat, characterized in that the mounting seat mounting portion is shaved with a surface layer left, and the scraped portion is coated with a reactive hot melt (80) and the clip mounting seat (60) is crimped. 2. The PPO resin foam layer (21) is provided with P on the front and back surfaces.
A clip mounting seat (6) for mounting a clip (50) fitted to a vehicle body panel (40) at a predetermined position on the back surface of a PPO resin base material (20) formed with a PO resin skin layer (22).
In the method of mounting the clip mounting seat for mounting 0),
A reactive hot melt (80) is used as an adhesive medium between the PPO resin substrate (20) and the clip mounting seat (60), and the clip of the PPO resin substrate (20) is formed after the PPO resin substrate (20) is molded. A clip characterized by scraping off the mounting part with a wire brush (70) with the surface layer left, applying reactive hot melt (80) to the scraped part, and crimping the clip mounting seat (60). How to mount the mounting seat. 3. The method for mounting a clip mounting seat according to claim 1, wherein an accelerator is sprayed on the reactive hot melt (80) and the clip mounting seat (60) is pressure-bonded in that state. 4. The PPO resin base material (20) is a core material for an automobile body roof trim, and the thickness of the PPO resin base material (20) is a region corresponding to a mounting region of a clip mounting seat (60) ( The method of mounting a clip mounting seat according to claim 1 or 2, wherein only A) is thin.