KR20110082952A

KR20110082952A - Crash pad for vehicle

Info

Publication number: KR20110082952A
Application number: KR1020100002907A
Authority: KR
Inventors: 이칠성
Original assignee: 해양산업 주식회사
Priority date: 2010-01-12
Filing date: 2010-01-12
Publication date: 2011-07-20

Abstract

The present invention relates to an automobile crash pad which is advantageous for mass production by preventing the release of environmental hormones such as dioxins and applying SMC material having excellent moldability to the core layer by using a TPO material which is an environmentally friendly material for the skin layer.
To this end, the present invention is a core layer disposed inside the front of the driver's seat and the passenger seat;
An epidermal layer formed to surround the outer side of the core layer; And
It provides a crash pad for automobiles, characterized in that it comprises a foam layer in which the polyurethane is injected and foamed to buffer between the core layer and the skin layer.

Description

Crash pad for vehicle

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automobile crash pad, and more particularly, to an automobile crash pad disposed in front of a driver's seat and a passenger seat to mitigate an impact.

In general, an automobile is composed of an engine that generates power, a body that constitutes an external appearance, and a chassis that is mounted on the vehicle body and that enables driving and stopping by using the power generated by the engine.

Among them, the body forms the overall appearance of the vehicle through the joining of a plurality of panels, such as welding or bolts.

In addition, the vehicle body is equipped with engines and transmissions, and various accessories necessary for driving.In the event of a collision and overturning accident, it is required to have sufficient rigidity to protect passengers in the cabin from external shocks, It is combined with a structure that can absorb shocks to reduce injuries by minimizing the force transmitted to passengers by absorbing them.

Among the components of such a vehicle body, in particular, the crash pads disposed in front of the driver's seat and the passenger seat are assembled with an instrument panel on which clusters are installed, and a glove box is provided.

Since the crash pads may be injured by the passenger's head during a frontal crash, foams such as urethane foam are filled therein to absorb a certain amount of impact.

In addition, the crash pad is a foam layer that cushions the core layer disposed inside the front of the driver's seat and the passenger seat, the skin layer surrounding the outer side of the core layer, and crash pad foam (FOAM) is injected between the core layer and the skin layer. Consists of.

Types of the skin layer include PVC (ABS) sheet, PU spray type, urethane painting (or gel coating: FRP), PP painting (PPINTING) (PP injection) and the like.

Among them, PVC begins to decompose at a temperature below the melting point of 100 ° C., is decomposed by light, and has a disadvantage of relatively low softening point, but has chemical resistance, flame retardancy, and various additives. Due to its compatibility, etc., it is possible to make a variety of products from soft to soft products to hard products.

In addition, PVC resin has a glass transition temperature (Tg) of 80-82 ° C. and an amorphous polymer having a crystallinity of 10% or less, thereby making a very transparent product such as glass.

However, the PVC resin has a problem of causing an environmental problem of generating a chloride material such as dioxins when incinerated.

Types of the core layer include an injection molded product made by injection of ABS, PP (PolyPropylene), and steel (STEEL).

Among them, ABS is a thermoplastic resin made from three monomers of acrylonitrile, butadiene, and styrene, having high water absorption, and usually having a water content of 0.3 to 0.6%.

In addition, the ABS is a product that improves elastic modulus, rigidity, dimensional stability, etc. It is used in various kinds of frames and precision equipment parts, and the production and supply of various color products according to the required characteristics, easy to process, high impact resistance and good heat resistance There is an advantage.

However, the ABS has a relatively large moisture content, so when the mold is formed without drying, problems such as surface damage may occur. Therefore, it is necessary to reduce the moisture content to within 0.1% through predrying.

The present invention has been invented in view of the above, and an object of the present invention is to provide a crash pad for an automobile in which an environmentally friendly TPO material is used for the epidermal layer, and an SMC material having excellent moldability is applied to the core layer.

The above object is an automotive crash pad,

A core layer disposed inside the front of the driver's seat and the passenger seat;

An epidermal layer formed to surround the outer side of the core layer; And

It is achieved by a crash pad for an automobile, characterized in that it comprises a foam layer in which a polyurethane is injected and foamed to buffer between the core layer and the skin layer.

The advantages of the crash pad for automobiles according to the present invention are as follows.

1. By applying TPO sheet material to the skin layer, it is possible to produce environment-friendly products without emitting environmental hormones when incinerated after scrapping.

2. By applying SMC material to the core layer, it has no adhesiveness and excellent moldability. Especially, it is a high-strength industrial material for automobiles, and it is easy to automate and short molding cycle, which is advantageous for mass production compared to other thermosetting composite molding methods. Do.

1 is a perspective view showing a crash pad according to an embodiment of the present invention
Figure 2 is a cross-sectional view AA in Figure 1
Figure 3 is a cross-sectional view showing the manufacturing mold of the crash pad according to an embodiment of the present invention

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view illustrating a crash pad according to an embodiment of the present invention, FIG. 2 is a sectional view taken along line AA in FIG. 1, and FIG. 3 is a sectional view showing a mold for manufacturing a crash pad according to an embodiment of the present invention. .

The crash pad 10 according to an embodiment of the present invention includes a core layer 13 disposed inside the front of the driver's seat and the passenger seat, a skin layer 11 surrounding the outside of the core layer 13, and the core layer ( It is composed of a foam layer (12) for injecting a polyurethane foam between the 13) and the skin layer (11) to buffer.

SMC is applied to the core layer 13 according to an embodiment of the present invention.

The SMC (Sheet Molding Compound) is a sheet matrix by impregnating a resin compound (COMPOUND) mixed with additives such as a low shrinkage agent, a filler, a curing agent, a thickener, and a pigment in a liquid matrix (MATRIX) resin. One thermosetting intermediate molding material.

The product is molded by cutting an appropriate amount of the SMC into a mold and curing by heating and pressing according to a predetermined pattern.

The non-adhesive, excellent formability, in particular, high-strength industrial materials as automotive materials, easy automation and short molding cycle is advantageous for mass production compared to other thermosetting composite molding method.

By applying the TPO sheet to the epidermal layer 11 according to an embodiment of the present invention, it is possible to reduce the substances adversely affecting the environment during incineration after scrapping.

The TPO (Olefin-based Thermoplastic Elastomer) is a kind of TPE (Thermoplastic Elastomer), which combines the advantages of plastic and rubber, and is mainly made of PP (Poly-propylene) and EPDM (Ethylene Propylene Diene Monomer).

The TPO sheet has an advantage of not causing environmental problems such as the generation of chloride materials such as dioxins when incinerated with environmentally friendly materials.

Foam layer 12 according to an embodiment of the present invention is a foamed by a predetermined pressure after injecting PU between the epidermal layer 11 and the core layer 13, foamed by a low pressure and foamed by a high pressure There is a way.

In the case of low-pressure foaming, the equipment price is low, but the raw material consumption is high, it can be used for small or medium sized objects.

In the case of the high-pressure foam, the equipment price is high, but the raw material consumption is small and can be used for medium and large sized objects.

Looking at the manufacturing method of the crash pad according to an embodiment of the present invention, the skin layer 11 is seated on the lower mold 20b of the urethane foam mold, and the core layer 13 is seated on the upper mold 20a of the urethane foam mold. Next, the upper mold 20a and the lower mold 20b are closed.

Then, after injecting PU between the skin layer 11 and the core layer 13 and foamed at a predetermined pressure to form a foam layer (12).

Finally, the crash pad composed of the skin layer 11, the core layer 13, and the foam layer 12 is extracted from the mold.

10: crash pad 11: epidermal layer
12 foam layer 13 core layer
20a: Upper mold 20b: Lower mold

Claims

In an automobile crash pad,
A core layer 13 disposed inside the front of the driver's seat and the passenger seat;
An epidermal layer 11 formed to surround the outer side of the core layer 13; And
Crash pad for automobile, characterized in that it comprises a foam layer (12) injected and foamed polyurethane to buffer between the core layer (13) and the skin layer (11).

The crash pad of claim 1, wherein the core layer is formed of an SMC material.

The crash pad of claim 1, wherein the skin layer is formed of a TPO sheet material.