JPS623155A - Oil pan material - Google Patents

Abstract

PURPOSE:To improve impact resistance of an oil pan material by laminating high impact resistant layer at least on one side of fiber reinforced plastic layer containing long glass fiber strands. CONSTITUTION:On one side of a long strand fiberglass reinforced plastic layer 21, a short strand fiberglass reinforced plastic layer 22 is formed, and on the other side of the layer 21 a high impact resistant plastic layer without containing glass fiber strands is formed. In this case, as the said layer 21 is required of enough strength as an oil pan, mixture ratio is made such that for example 30 to 70 weight parts of long strand glass fibers of average strand length 2.5cm are added to 100 weight parts of polymer such as polyamide. And the mixture of the said layer 22 is made such that for example 25 to 35 weight parts of short strand glass fibers to average strand lengths 1 to 5mm are added to 100 weight parts of polymer such as polyamide. Further the said layer 23 is preferably of good weatherproof property as well as of high impact resisetance and is made of a layer of polymer such as polyamide of thicknesses from 2 to 5mm.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to oil pan materials, and more particularly to oil pan materials with improved impact resistance.

[Technical background of the invention]

The oil pan 1 is connected to the cylinder block 2 as shown in Figure 1.
It is attached to the lower part of the engine and has the function of securing the oil necessary for the engine and cooling the oil. Conventionally, such an oil pan 1 was generally manufactured from metal, but in recent years, in order to reduce the weight of the vehicle, improve maneuverability, and improve fuel efficiency, it has become possible to use a lightweight and strong oil pan. Fiber reinforced plastics (hereinafter referred to as FRP) have come into use.

These FRP oil pan materials are made by combining synthetic resin with glass fibers and hardening them, but in order to store the oil that is heated during engine operation, they have excellent heat resistance and durability. In order to ensure its properties, it is required to satisfy various conditions such as good weather resistance, strength, and rigidity. In addition, since the oil pan 1 is mounted exposed on the back of the car body for convenience of oil changes, etc., it is necessary to have higher impact resistance, so an ideal oil that satisfies various conditions is required. Bread ingredients are in demand.

[Summary of the invention]

The present invention has been made in view of the above points, and the present invention has been made in view of the above points.
RP I! It is an object of the present invention to provide an oil pan material with which an oil pan having better impact resistance than other oil pans can be manufactured.

Therefore, the oil pan material according to the present invention is characterized in that a high-impact resin layer is laminated on at least one side of a fiber-reinforced plastic layer containing long glass fibers.

According to the oil pan material according to the present invention, since a high impact resistant synthetic resin layer is formed on at least one side of the FRP layer reinforced with long glass fibers, better impact resistance can be obtained compared to conventional ones. There are advantages.

[Detailed description of the invention]

According to one embodiment of the oil pan material according to the present invention, the second
As shown in the figure, a short fiber reinforced FRP layer 22 is formed on one side of a long fiber reinforced FRP layer 21, and a high impact resistant synthetic resin layer 23 not containing glass fiber is laminated on the other side. It has a similar structure.

The aforementioned long fiber reinforced FRP layer 21 and short fiber reinforced FRP
The layer 22 is laminated to ensure the strength and rigidity of the oil pan, and the short fiber reinforced FRP layer 22 is used on the inner wall side of the oil pan where high impact resistance is not required. There is.

Since such long fiber reinforced FRP layer 21 needs to ensure sufficient strength as an oil pan, it is preferably made of glass having an average length of 2.50 to 2.50 mm.
It is desirable that 30 to 70 parts by weight of long fibers be blended with 100 parts by weight of the resin. This is because if the average length of the long glass fibers is less than 2.5 cm, there is a risk that sufficient strength as an oil pan may not be ensured.

Furthermore, if the amount of glass fiber blended is less than 30 parts by weight based on 100 parts by weight of the resin, there is a risk that sufficient strength cannot be secured, while if it is more than 70 parts by weight, there will be too much glass fiber and the result will not be good. This is because there is a possibility that a suitable FRP layer will not be formed.

Such long fiber reinforced FRP layer 21 preferably has 2 to
The thickness is preferably 5 mm. If it is less than 2III, there is a risk that sufficient strength as an oil pan cannot be ensured.On the other hand, if it is thicker than 5+a+a, the weight becomes large and is not economical.

The resin used for the above-mentioned long fiber reinforced FRP layer 21 should have good heat resistance and good adhesion to the short fiber reinforced FRP layer 22 or high impact resistance resin layer 23 to be laminated. Preferably, it is a certain resin. As such resin, polyamide resin, unsaturated polyester, epoxy resin, etc. can be used.

The short fiber reinforced resin layer 22, which is laminated together with the long fiber reinforced FRP layer 21 to ensure the strength of the oil pan material, preferably includes 100 parts by weight of resin of short glass fibers having an average length of 1 to 51III+. It is preferable to mix 25 to 35 parts by weight. When the average length of the glass fibers is less than 1 mm, the long fiber reinforced FRP layer 2
On the other hand, if it exceeds 5mII+, there is a possibility that the function as a complementary layer becomes more than necessary.

Furthermore, if the amount of glass fiber blended is less than 25 parts by weight based on 100 parts by weight of the resin, there is a risk that sufficient strength cannot be ensured, while if it is more than 35 parts by weight, there is a risk that the functionality will be more than necessary. arise.

The thickness of such short fiber reinforced FRP layer 22 is preferably 2 to 5 mm. This short fiber reinforced FRP
If the thickness of the layer 22 is less than 2 mm, there is a possibility that the reinforcing effect of the long fiber reinforced plastic 21 will be small.
This is because if it exceeds I11, it becomes uneconomical.

The resin used as the base material of the short fiber reinforced FRP layer 22 has excellent oil resistance and heat resistance because the short fiber reinforced FRP layer 22 comes into contact with oil and is placed under high temperature. It is desirable to select a synthetic resin that has good peel strength with the long fiber reinforced plastic layer 21. As such resin, for example, polyamide resin, unsaturated polyester resin, epoxy resin, etc. can be used.

Furthermore, the high-impact resin layer 23 laminated on the other side of the long fiber reinforced FRP layer 21 is laminated to prevent cracks from occurring in the oil pan due to collisions caused by flying pebbles, etc. Therefore, it is a layer exposed to the atmosphere. For this reason, it is preferable to have high impact resistance and excellent weather resistance. Examples of such resins include polyamide resins, polycarbonate resins, high toughness polyamide resins containing polyethylene elastomers, and polyester resins.

The thickness of such a high impact resistant resin layer 23 is preferably 2 to 5II11. This thickness is 2IIl1
If it is less than 11, there is a possibility that good impact resistance cannot be exhibited, while if it exceeds 5III+, it becomes uneconomical.

In addition, in the above explanation, the long fiber reinforced FRP layer 21
Although the short fiber-reinforced FRP layer 22 is provided on one of the layers, the short fiber-reinforced pRp layer 22 may be replaced by the above-mentioned high impact resistant resin layer.

Examples of the present invention will be described below.

Example A continuous glass fiber mat was impregnated with polyamide resin, and a polyamide resin (nylon G) containing 33 parts by weight of short glass fibers with an average length of 31 m111 was laminated on a synthetic resin mantle with a glass fiber content of 33 parts by weight. An oil pan material was produced in which a polyamide resin (A), a polycarbonate resin (B'), and a high toughness polyamide resin (C) were laminated as high impact resistant resins on the other side. A 1.0 kg steel ball was dropped onto this oil pan material from a predetermined height, and the height at which the ball broke was measured (falling ball impact strength). The results are shown in Figure 3. For comparison, the results of a similar test on conventional FRP oil pan materials are also shown (
D).

As is clear from this graph, while the conventional FRP oil pan material (D) broke at 200 cm, the oil pan materials according to the present invention (A, B, C) broke at 300 to 50 cm.
It showed impact resistance of 00 or higher.

〔Effect of the invention〕

As explained above, according to the oil pan material according to the present invention, at least one part of the long fiber reinforced FRP layer
.

Since a synthetic resin layer with high impact resistance is formed on the side, there is an advantage that the impact resistance of the oil pan is improved by 1.5 to 2.5 times or more.

[Brief explanation of drawings]

FIG. 1 is a perspective view for explaining an oil pan, FIG. 2 is a sectional view of a specific example of the present invention, and FIG. 3 is a graph showing the results of an impact test of the embodiment of the present invention. 21... Long fiber reinforced FRP layer, 22... Short fiber reinforced PRP eyebrow, 23... High impact resistant resin layer.

Claims (1)

[Claims] (1) An oil pan material characterized in that a high impact resistant resin layer is laminated on at least one side of a fiber reinforced plastic layer containing long glass fibers.