CN102745247A - Vehicle roof - Google Patents

Abstract

The invention discloses a vehicle roof, which comprises a carbon fiber composite material layer, wherein the carbon fiber composite material layer comprises an upper layer and a lower layer; and a closed-cell foam material layer is arranged between the upper layer and the lower layer. The closed-cell foam material is light in mass and low in cost, so that the weight of the vehicle roof is lightened, and the raw material cost of the vehicle roof is reduced; and moreover, the vehicle roof with the structure has the characteristics of high strength, impact resistance and rigidity and excellent heat-insulating property.

Description

Car roof

Technical field

The invention belongs to auto parts and components and make the field, be specifically related to a kind of car roof.

Background technology

Along with the raising that energy-saving and emission-reduction require, the light in structure of automobile quantizes more and more to receive people's attention.Because carbon fiber composite material has distinguishing features such as high strength, high-modulus, lower density, antifatigue, in recent years, the application of carbon fiber composite material greatly reduces the body structure weight of automobile.Selecting carbon fiber composite structure for use like the car roof of BMW automobile is exactly typical examples of many successful.Yet high carbon fiber productive costs has limited the large-scale promotion and the application of carbon fiber composite material vehicle structure to a certain extent.Therefore, under the prerequisite that the carbon fiber cost can't descend in a short time significantly, also can reduce the consumption of carbon fiber effectively to the Optimal Structure Designing of auto parts and components composite material, thereby reduce the cost of raw material of composite material parts.

Summary of the invention

The purpose of this invention is to provide a kind of in light weight, car roof that cost is low.

For realizing above-mentioned purpose, the present invention adopts following technical scheme: a kind of car roof, comprise the carbon fiber composite material layer, and it is characterized in that: described carbon fiber composite material layer comprises the upper and lower, is the closed-cell foam material layer between the described the upper and lower.

Owing to adopt above technical scheme; Closed-cell foam material light weight and cost are low, thereby have alleviated the weight of car roof, have reduced the cost of raw material of car roof; And the car roof of this structure has high strength property, impact resistance and stiffness characteristics, also has excellent heat-proof quality simultaneously.

Description of drawings

Fig. 1 is a structural representation of the present invention.

The specific embodiment

As shown in Figure 1, the scheme that the present invention adopts does, a kind of car roof comprises carbon fibercomposite material layer 10, and described carbon fibercomposite material layer 10 comprisesupper strata 10a and the 10b of lower floor, is closed-cellfoam material layer 20 between describedupper strata 10a and the 10b of lower floor.The present invention is provided with closed-cellfoam material layer 20 at the upper strata of carbon fibercomposite material layer 10 10a and the 10b of lower floor; Reduced the consumption of car roof carbon fiber like this, thereby reduced the cost of raw material of car roof, in addition; The light weight of closed-cell foam material; So also alleviated the weight of car roof significantly, and the closed-cell foam material of interlayer plays the effect of support, rigidity in the structure of car roof, also have excellent heat-proof quality simultaneously.

Concrete scheme is that described closed-cellfoam material layer 20 can adopt polyimide (PMI) foamed materials or polyvinylchloride (PVC) foamed materials or polyurethane (PU) foamed materials.Numerous disconnected each other abscesses chamber is arranged on these closed-cell foam materials, have excellent heat-proof quality.

Described carbon fibercomposite material layer 10 adopts the fine and glass blending plain cloth of 3K carbon, and theupper strata 10a and the 10b of lower floor that constitute carbon fibercomposite material layer 10 constitute by four layers of elementary layer.In the car roof forming process,upper strata 10a and the 10b of lower floor are layering paving in mould by four layers of 3K carbon fibre and glass blending plain cloth respectively.

Further, the edge of describedupper strata 10a and the 10b of lower floor is bonded as one.

Further, the edge of describedupper strata 10a and the 10b of lower floor is coated on the periphery of closed-cellfoam material layer 20, and place, slit between the two is filled with resin.This set makesupper strata 10a and the 10b of lower floor of carbon fibercomposite material layer 10 and closed-cellfoam material layer 20 be bonded together well, helps the moulding of car roof.

Further, the length direction of described carbon fibercomposite material layer 10 fiber is consistent with the left-right symmetric direction of principal axis of car roof.This set helps the moulding of car roof; Because in the process of moulding; Resin can flow along the length direction of carbon fibercomposite material layer 10 fiber; Resin can soak into whole carbon fibercomposite material layer 10 and layer of closed-cell foam 20 very soon like this, thereby avoids resin incomplete to the infiltration of carbon fibercomposite material layer 10 and layer of closed-cell foam 20, has improved the reliability of car roof quality.

Further again, like Fig. 1, have throughhole 21 equably on the described closed-cellfoam material layer 20, throughhole 21 and nose end place are filled with resin.Because the abscess chamber on the closed-cellfoam material layer 20 is disconnected each other; Through on closed-cellfoam material layer 20, offering throughhole 21, in follow-up forming process, resin can soak into theupper strata 10a and the 10b of lower floor of sponge layer carbon fibercomposite material layer 10 of both sides about in the of 20 simultaneously; The infiltration that prevents carbon fibercomposite material layer 10 is incomplete; Simultaneously, theupper strata 10a that the setting of throughhole 21 can also enhanced carbonfiber composite layer 10 and the adhesive property of 10b of lower floor and closed-cellfoam material layer 20, thus guaranteed the quality of car roof; And this operation is comparatively simple; Operation can be used perforates on closed-cellfoam material layer 20 such as iron nail, pin easily, and the closed-cellfoam material layer 20 after the perforate more helps the infiltration of resin; And resin can be filled in throughhole 21 and nose end place thereof; Resin soaks into the back has formed similar rivet betweenupper strata 10a, the 10b of lower floor and closed-cellfoam material layer 20 map, thereby is one with carbon fibercomposite material layer 10 with closed-cellfoam material layer 20 bonding better, makes that the globality of ceiling is better.

Claims (7)

1. a car roof comprises carbon fiber composite material layer (10), it is characterized in that: described carbon fiber composite material layer (10) comprises upper strata (10a) and lower floor (10b), is closed-cell foam material layer (20) between described upper strata (10a) and the lower floor (10b).

2. car roof according to claim 1 is characterized in that: described closed-cell foam material layer (20) adopts polyimide (PMI) foamed materials or polyvinylchloride (PVC) foamed materials or polyurethane (PU) foamed materials.

3. car roof according to claim 1; It is characterized in that: described carbon fiber composite material layer (10) adopts the fine and glass blending plain cloth of 3K carbon, and the upper strata (10a) and the lower floor (10b) that constitute carbon fiber composite material layer (10) constitute by four layers of elementary layer.

4. car roof according to claim 1 is characterized in that: the length direction of described carbon fiber composite material layer (10) fiber is consistent with the left-right symmetric direction of principal axis of car roof.

5. car roof according to claim 1 is characterized in that: have through hole (21) on the described closed-cell foam material layer (20) equably, through hole (21) and nose end place are filled with resin.

6. car roof according to claim 1 is characterized in that: the edge of described upper strata (10a) and lower floor (10b) is bonded as one.

7. car roof according to claim 6 is characterized in that: the edge of described upper strata (10a) and lower floor (10b) is coated on the periphery of closed-cell foam material layer (20), and place, slit between the two is filled with resin.

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