JPH0420584Y2 - - Google Patents

Description

[Detailed explanation of the invention] (Industrial application field) This invention is a RIM molded product (reaction injection molded product)
Glass fiber reinforced with glass pine embedded inside
This invention relates to RIM molded products, and in particular to glass fiber reinforced RIM molded products with mounting clips.

(Prior art) Glass fiber-reinforced RIM molded products are molded by high-pressure injection of reactive resin raw materials such as polyurethane into a mold equipped with a glass mat. Because it is an integrated product, 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 the attachment work, it is preferable to embed and fix the base of the attachment clip in the resin on the back surface 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. 5, the seat plate 1 of the base 12 of the clip 10
3 on the glass mat 14, there is a problem that the holding strength of the clip base 12 is insufficient and the resin 16 holding the clip base 12 is easily destroyed when the molded product 18 is attached.

Further, by fixing the base 12 of the clip to the glass mat 14 in advance using a fixing means and embedding the base 12 in the resin as one body with the glass mat 14, the holding strength of the clip base 12 in the molded product 18 can be increased. is considered possible. However, because the clip 10 and the glass mat 14 are usually installed on different sides of a split mold (not shown) due to mold structure or manufacturing operations,
It was not possible to take such measures.

Furthermore, when attaching the molded product 18, the clip base 1
If the force applied to 2 can be dispersed, destruction of the resin 16 can be suppressed. Therefore, it is conceivable to fix the seat plate 13 of the clip base 12 to a large metal plate (not shown) and embed the clip base together with the metal plate in the resin.
However, this configuration could not be said to be preferable because the molded product 18 becomes heavy. Note that 20 in the figure is the epidermis.

(Problems to be solved by the invention) This invention solves the problems when embedding the base of the mounting clip in a glass fiber reinforced RIM molded product, namely, the RIM resin is easily destroyed around the base of the mounting clip, and This is to solve the problem of not being able to hold it firmly.

(Means for solving the problem) This invention is based on a glass fiber-reinforced RIM molded product having a mounting clip.
The seat plate of the base of the clip passed through the opening is sandwiched between a glass mat on the back side of the molded product and a glass mat on the front side of the molded product.

(Function) The part where the glass mat is present in the glass fiber reinforced RIM molded product has high rigidity and strength because the resin penetrates between the glass fibers of the glass mat and hardens. Therefore, in this device in which the seat plate of the clip is sandwiched between the glass mats, the holding strength of the base of the clip is increased, and there is no risk of breakage at this portion.

In addition, when molding this device, one glass mat that clamps the seat plate of the clip is placed in one of the split molds together with the clip, and the other glass mat is placed in the other part of the split mold. , conventional molding methods can be used without causing any problems.

(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 30 according to an embodiment of this invention.

This glass fiber reinforced RIM molded product 30 has a mounting clip 32 and two glass mats 34, 3.
6. RIM (reaction injection molded product) resin 38 and skin 4
0, the seat plate 44 of the clip base 42
is sandwiched between two glass mats 34 and 36.

The clip 32 is fixed to a clip base 42 with a seat plate 44 projecting outward like a flange. Note that the seat plate 44 may be formed by making the end of the base 42 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 needs to protrude outward like a flange.

On the other hand, the glass mats 34 and 36 that sandwich the seat plate 44 of the clip are preferably about 2 to 4 mm thick in order to reduce weight. The glass mat 34 on the upper surface of the seat plate 44 (the back surface of the molded product 30) is larger than the seat plate 44 by a predetermined amount, and has a hole 34a or slit 34b approximately in the center thereof as shown in FIG. 2 or 3. An opening is formed for insertion of the clip 32. In contrast, the glass mat 3 on the lower surface of the seat plate 44 (the surface of the molded product 30)
6 is larger than the glass mat 34 and has a size that covers almost the entire molded product 30.

The RIM resin 38 can be said to be the main component of the molded product 30, and is a hardened RIM resin raw material. In the glass mats 34, 36, the RIM resin raw material penetrates between the glass fibers and hardens, thereby becoming integrated with the glass mats 34, 36.

Further, the skin 40 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 product use.

The glass fiber-reinforced RIM molded product made in this way has high strength and rigidity in the area where the glass mats 34 and 36 are present, and the seat plate 44 of the clip is sandwiched between the glass mats 34 and 36. The holding strength of the clip base 42 is high, and the holding portion around the base 42 will not break.

Next, a manufacturing example of this glass fiber reinforced RIM molded product 30 will be explained. FIG. 4 shows the molded product 30.
FIG. 4 is a longitudinal cross-sectional view of the split mold 46 during manufacture.

The split mold 46 consists of an upper mold 48 and a lower mold 50,
Cavity surfaces 52 and 54 that assume the product shape when the mold is closed
has. Moreover, on the cavity surface 52 of the upper mold,
A hole 56 is provided for a clip 32 device. Note that the recess 58 is for closing the area around the hole 56 when the glass mat 34 is accommodated in the recess 58 when the clip 32 is installed.
RIM resin raw material is prevented from entering the hole 56 and adhering to the clip 32.

The clip 32, which is inserted into the clip insertion opening of the glass mat 34, is installed in the hole 56 in the upper mold cavity surface. With this device, if the hole 56 is made slightly smaller than the outer shape of the clip 32, the clip 32 can be inserted into the hole 56 by simply inserting the clip 32 into the hole 56.
2 locks into the hole 56 due to its elasticity, this can be done extremely easily.

Further, a skin 40 and a glass mat 36 are installed on the lower mold cavity surface 54.

Next, the upper mold 48 and the lower mold 50 are closed, and the divided mold 46
The RIM resin raw material is injected into the cavity from the injection port (not shown).

The injected RIM resin raw material inside the cavity is
It penetrates between the glass fibers constituting the glass mats 34 and 36 and immediately reacts and hardens, and the glass mats 3
4 and 36 to form RIM resin.

Then, by demolding the molded product, a glass fiber-reinforced RIM molded product 30 shown in FIG. 1 is obtained.

(Effects of the invention) This invention is a glass fiber-reinforced RIM molded product with a mounting clip, in which the seat plate of the mounting clip is sandwiched between glass mats, which increases the holding strength of the clip base. This made it possible to prevent the holding part around the base of the clip from breaking during installation.

Furthermore, conventional manufacturing methods can be used to manufacture this glass fiber-reinforced RIM molded product, and the manufacturing work does not become complicated or difficult.

[Brief explanation of the drawing]

Fig. 1 is a partial sectional view of a glass fiber reinforced RIM molded product according to an embodiment of this invention, Figs. 2 and 3 are perspective views of an embodiment of a glass mat, and Fig. 4 is a glass fiber reinforced RIM of this invention. FIG. 5 is a cross-sectional view of a split mold during production of a molded product, and FIG. 5 is a partial cross-sectional view of a conventional product. 32... Clip, 34, 36... Glass mat, 38... RIM resin, 40... Epidermis, 44...
...Seat board.

Claims (1)

[Scope of utility model registration request] Glass fiber reinforced RIM with mounting clips
In the molded product, an opening for inserting the clip is provided in the glass mat on the back side of the molded product, and the seat plate at the base of the clip passed through the opening is sandwiched between the glass mat on the back side of the molded product and the glass mat on the front side of the molded product. Glass fiber-reinforced RIM molded product with mounting clips.