JPH05341Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention relates to a glass fiber reinforced RIM molded product having a mounting clip.

(Prior art) Glass fiber-reinforced RIM molded products are molded by high-pressure injection of reactive resin materials such as polyurethane into a mold equipped with a glass mat. Since the mat and the resin are integrated into one body, it has extremely high rigidity, and the molding time is short, so its use in various fields including interior and exterior materials for automobiles has been considered in recent years.

By the way, the glass fiber reinforced RIM molded product is
In order to facilitate attachment to a vehicle body, etc., it is preferable to embed and fix the base of the attachment clip in the RIM resin of the molded product.

However, the RIM resin that makes up the glass fiber reinforced RIM molded product is generally more brittle than hard plastics such as ABS resin.
As shown in FIG. 4, the seat plate 1 of the base 12 of the clip 10
3 on the glass mat 14, the molded product 1
There is a problem in that the RIM resin 16 that holds the seat plate 13 at the base of the clip is easily destroyed when the clip 8 is attached.
In the figure, 20 is the epidermis.

Therefore, in order to solve the above problem, the present inventor has developed a glass fiber-reinforced structure having the structure shown in Fig. 5.
RIM molded product 30 was devised first. The molded product 3
0 consists of a mounting clip 32, a RIM resin 38, two glass mats 34, 36 embedded in the RIM resin, and a skin 40, and the seat plate of the clip base 42 is attached to the two glass mats 34,
36 increases the holding strength of the seat plate 44 at the base of the clip and prevents the RIM resin from breaking.

However, it has been found that the molded product 30 tends to swell or dent on the surface of the molded product near the mounting clip 32 over time after manufacture. The swelling and the like are considered to be due to the following structure of the molded product 30.

Glass mat 3 located on the surface side of the molded product 30
Reference numeral 6 is for reinforcing the molded product 30, and therefore has a size that covers approximately the entire molded product. On the other hand, the glass mat 34 located on the mounting surface side simply clamps and fixes the seat plate 44, and since it is preferably as small as possible to reduce weight, it has a shape slightly larger than the seat plate 44. . In addition, the epidermis 40
The thickness of the molded product 30 except for the thickness of the molded product 30 is substantially constant over the entire molded product, and is substantially equal to the sum of the thicknesses of the two glass mats 34 and 36.

Therefore, in the molded product 30, a portion A in which two glass mats 34 and 36 are embedded in the RIM resin having a substantially constant thickness and a portion B in which only one glass mat 36 is embedded are adjacent to each other. That is, a part A where the buried part of the front side glass mat 36 and the buried part of the mounting surface side glass mat 34 are in a kind of laminated state, and the buried part of the front side glass mat 36.
There is a portion B adjacent to the RIM resin single portion in a kind of laminated state.

As a result, the degree of dispersion and content of glass fibers in the RIM resin in parts A and B differ greatly, resulting in a marked difference in the shrinkage rate of the RIM resin in parts A and B. It is thought that swelling, dents, etc. occur in the epidermis C of the patient.

(Problems to be solved by the invention) This invention was devised in view of the above-mentioned points.It has a high holding strength at the base of the mounting clip, and also prevents bulges, dents, etc. on the surface of the molded product near the mounting clip. The objective is to provide glass fiber-reinforced RIM molded products that are difficult to manufacture.

(Means for Solving the Problem) This invention is a glass fiber reinforced RIM molded product having a mounting clip, in which the seat plate of the clip is a reinforcing glass mat on the surface side of the molded product and the seat plate on the mounting surface side of the molded product. It is characterized in that it is sandwiched between a fixing glass mat and embedded in the RIM resin together with both glass mats, and the embedded part of the seat plate fixing glass mat protrudes toward the attached part.

(Function) The glass fiber-reinforced RIM molded product of this invention is
It consists of a part where a reinforcing glass mat and a glass mat for fixing the seat plate are buried in a stacked state with the seat plate of the clip interposed in the RIM resin, and a part where only the reinforcing glass mat is buried. Since the buried portion of the glass mat for fixing the seat plate protrudes toward the attached part (for example, the vehicle body), only the area where the glass mat for fixing the seat plate exists is thick, and the area adjacent thereto is thin. Therefore, the adjacent part has a thickness corresponding to the buried part of the glass mat for fixing the seat plate, as shown as part B in Fig. 5 above.
Unlike conventional products, there is no single RIM resin part.

Therefore, the degree of dispersion and content of glass fibers in the RIM resin do not differ greatly between the area where the glass mat for fixing the seat plate is present and the area where the glass mat for fixing the seat plate is not present, and both parts Since the difference in the shrinkage rate of the RIM resin becomes smaller, swelling, denting, etc. are less likely to occur on the surface of the molded product near the mounting clip.

(Example) This invention will be explained below based on an example using drawings.

FIG. 1 is a partial sectional view of a glass fiber reinforced RIM molded product 50 according to an embodiment of this invention.

This glass fiber reinforced RIM molded product 50 is composed of a mounting clip 52, a reinforcing glass mat 54, a seat plate fixing glass mat 56, a RIM resin 58, and a skin 60. and the clip base 6
The second seat plate 64 is connected to the two glass mats 54, 5.
6, and the two glass mats 5
4 and 56 in RIM resin 58,
The buried portion 66 of the glass mat for fixing the seat plate protrudes toward the attached portion. The amount of protrusion of the buried portion 66 toward the attached portion is such that the seat plate 64 is
It is preferable that the position be approximately the same as the surface of the buried portion 68 of the reinforcing glass mat surrounding the reinforcing glass mat. Therefore, when the thickness of the buried portion 66 of the glass mat for fixing the seat plate and the thickness of the glass mat 56 are approximately equal, the amount of protrusion is approximately the same as the thickness of the glass mat 56.

The mounting clip 52 has a seat plate 64 that is fixed to a clip base 62 with the seat plate 64 protruding like a flange. Note that the seat plate 64 may be formed by making the end of the clip base 62 protrude outward by a predetermined amount in the form of a flange. Of course, the shape of the clip and the shape of the seat plate are not limited to those shown. However, the seat plate must protrude outward like a flange.

It is preferable that the glass mats 54 and 56 have a thickness of about 2 to 4 mm for weight reduction. Also,
Reinforcing glass mat 54 located on the surface side of the molded product
has a size that covers almost the entire molded product in order to enhance the reinforcing effect. On the other hand, the glass mat 56 for fixing the seat plate located on the mounting surface side only needs to be able to clamp the seat plate 64 of the clip, and in order to make the molded product lightweight, it is larger by a predetermined amount than the seat plate 64 of the clip. It is smaller than the reinforcing glass mat 54. Further, the glass mat 56 for fixing the seat plate has a hole 56a or slit 56b formed approximately in the center thereof, as shown in FIG. 2 or 3, through which the clip 52 is inserted.

Further, it is preferable that the buried portion 68 of the reinforcing glass mat and the buried portion 66 of the fixing glass mat have the same glass fiber content. Therefore, for example, when the glass mats 54 and 56 have the same glass area weight, the thicknesses of both glass mats 54 and 56 are made equal, and the glass area weight of the glass mat 56 for fixing the seat plate is equal to the glass area weight of the reinforcing glass mat 54. In the case of half of , the thickness of the protrusion including the glass mat 56 for fixing the seat plate is 1/2 the thickness of the plate including the reinforcing glass mat 54 which is the main body of the product.

The RIM resin 58 has a reactive resin raw material (RIM resin raw material) such as polyurethane that is made of glass matte 54,
It penetrates between the glass fibers of 56 and hardens, and is integrated with the glass mats 54 and 56.

The outer skin 60 is made of a material selected from among a plastic sheet such as a vinyl chloride resin sheet, a fabric lined with a plastic film, etc. depending on the intended use of the product.

(Effect of the invention) The glass fiber reinforcement of this invention is thus made.
In RIM molded products, the strength of the embedded part is high due to the embedded glass mat for reinforcement and the glass mat for fixing the seat plate, and the seat plate of the mounting clip is sandwiched between the glass mats, so the holding strength of the clip base is increased. It will not become too high and cause destruction of the RIM resin around the base of the clip.

Moreover, the buried part of the glass mat for fixing the seat plate protrudes toward the mounting part, and there is no RIM resin alone around the buried part corresponding to the thickness of the glass mat for fixing the seat plate, so the area where the glass mat for fixing the seat plate exists is The degree of dispersion and content of glass fiber in the RIM resin does not differ greatly between adjacent parts, and the difference in shrinkage rate between the two parts becomes small, so there is no bulge or dent on the surface of the molded product near the mounting clip. It has the effect of making it difficult to cause such problems.

[Brief explanation of drawings]

Figure 1 is a partial cross-sectional view of one embodiment of this invention;
3 and 3 are perspective views of the glass mat for fixing the seat plate, and FIGS. 4 and 5 are partial sectional views of the conventional product. 52...Mounting clip, 54...Glass mat for reinforcement, 56...Glass mat for fixing the seat plate, 5
8...RIM resin, 64...Seat plate of the mounting clip, 66...Embedded part of the glass mat for fixing the seat plate.

Claims (1)

[Scope of utility model registration request] Glass fiber reinforced RIM with mounting clips
In the molded product, the seat plate of the clip is sandwiched between a reinforcing glass mat on the surface side of the molded product and a glass mat for fixing the seat plate on the mounting surface of the molded product, and is embedded together with both glass mats in RIM resin to fix the seat plate. A glass fiber-reinforced glass mat characterized in that the embedded part of the glass mat protrudes toward the part to be attached.
RIM molded product.