KR101417440B1 - Garnish for interial parts of automobile and manufacturing method of the same - Google Patents

Abstract

The present invention relates to a garnish for automobile interior parts and a method for manufacturing the same, which realizes a three-dimensional pattern using a real material,
A sandwich panel having a multi-layer structure in which a transparent layer made of a transparent material is laminated on both upper and lower sides with respect to a pattern layer made of a real material in the center, and a substrate layer formed on the back surface of the sandwich panel Provide a garnish.

Description

Technical Field [0001] The present invention relates to a garnish for automobile interior parts and a manufacturing method thereof.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a garnish attached to an automobile interior part, and more particularly, to a garnish for an automobile interior part and a method of manufacturing the same, which realizes a three-dimensional pattern using real materials to enhance automobile interior parts.

Generally, garnishes are applied as decorative parts to be attached to interior parts to improve and protect the appearance of the car. Recently, garnishes using various materials have been manufactured to enhance the quality of automobile interior parts.

Conventionally, various natural materials such as real wood, real aluminum, carbon weave film, and mother-of-pearl were used for garnish for automobile interior parts to express the texture.

However, in the case of the existing garnish, due to the temperature and pressure of the mold, pattern damage or bulging occurred, and it was impossible to insert the pattern directly.

In the case of the conventional garnish for internal parts to which a real material is applied, an aluminum sheet is bonded to the rear surface of a real material in order to secure moldability and to prevent deformation due to shrinkage before and after molding, There is a drawback that it causes complication.

Meanwhile, the conventional garnish for internal parts uses a clear layer coating, PUR casting (polyurethane reaction injection), double injection or the like in order to realize a depth feeling, and usually, except for using a real aluminum material, PUR casting provides depth and line spirituality.

However, the above-mentioned clear layer coating has a problem that the surface shape is low during molding, the PUR casting is complicated in process and high cost is generated, and the double injection causes a limited amount of usable materials due to large pattern damage during molding.

The present invention has been made in order to overcome the above problems, and it is an object of the present invention to simplify the manufacturing process compared to the prior art and to reduce the cost, and also to apply a three-dimensional pattern of a sandwich structure having a real material at the center, And to provide a method for manufacturing the same.

According to an aspect of the present invention, there is provided a multi-layered sandwich panel having a transparent layer made of a transparent material laminated on both upper and lower sides of a patterned layer made of a real material at the center, The present invention provides a garnish for automotive interior parts, comprising a base layer.

Preferably, the pattern layer is formed of a film or a nonwoven fabric layer on the lower surface of the upper and lower surfaces in order to ensure adhesion with the transparent layer.

According to the present invention, there is provided a method of manufacturing a semiconductor device, comprising: laminating a transparent material for forming upper and lower transparent layers on both sides of a real material for forming a pattern layer; injecting the transparent material into a press mold; And inserting and fixing the sandwich panel into an insert mold and injecting a substrate layer material into the insert mold to form a base layer on one side of the sandwich panel. to provide.

At this time, in order to prevent the surface layer of the sandwich panel from being damaged by the injection pressure, the base layer is injection-molded on the back surface of the sandwich panel, and the press molding is performed at a temperature of 120 to 135 ° C.

Preferably, the upper and lower transparent layers are formed to have a thickness of 0.5 to 5.0 mm.

In an embodiment of the present invention, the upper and lower transparent layers may be pre-heated to a predetermined temperature, pre-formed, and then put into a press mold in a sandwich structure with a pattern layer material interposed therebetween.

The garnish for automotive interior parts according to the present invention and its manufacturing method have the following advantages.

1. By realizing a three-dimensional pattern of sandwich structure using real material, realizing the surface texture and pattern inherent in real material, it is possible to form a high-quality and environment-friendly image of automobile interior parts.

2. It is possible to apply all kinds of materials capable of patterning at press molding temperature condition.

3. It is possible to simplify the process and reduce the cost by omitting the processes such as clear layer coating, PUR casting and polishing.

4. A panel having a sandwich structure capable of protecting the inner pattern layer is manufactured, and then a substrate layer is formed through insert injection, thereby securing the formability and preventing the post-deformation of the product.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a structural view showing a cross-sectional structure of a garnish for automotive interior parts according to the present invention;
2 is a flowchart showing a manufacturing process of a garnish for an automotive interior part according to the present invention,
3 is a flowchart showing another manufacturing process of garnish for automobile interior parts according to the present invention.

Hereinafter, the present invention will be described with reference to the accompanying drawings.

The present invention relates to a garnish for automobile interior parts and a method of manufacturing the same, and is characterized in that a three-dimensional pattern of a sandwich structure using a real material is formed to realize a surface texture and a pattern unique to a real material, .

Accordingly, in the present invention, a three-dimensional pattern sandwich panel having a real material at the center is manufactured, and then the substrate layer is injection-molded on the back surface of the sandwich panel using the sandwich panel as an insert.

As shown in FIG. 1, the garnish for automotive interior parts according to the present invention has transparent layers 13 and 14 made of a transparent material on both sides of a pattern layer 12 made of a real material at the center, A sandwich panel 11 having a three-layer structure and a base layer 15 formed on the back surface of the sandwich panel 11.

In the sandwich panel 11 implementing the three-dimensional pattern, the transparent layers 13 and 14 basically secure transparency of the surface layer of the sandwich panel 11 and protect the pattern layer 12 at the center to secure surface reliability .

Particularly, the upper transparent layer 13 is an upper plate positioned on the surface of the sandwich panel 11 so as to protect the pattern layer 12 from the outside and to sense the depth of the surface, and is made of PCTG (Poly cyclohexane Bi- methylene thelephthalate glycol modified, PC (polycarbonate), and PMMA (polymethyl methacrylate).

The lower transparent layer 14 is a lower plate of the sandwich panel 11 for protecting the pattern layer 14 during injection of the insert for forming the base layer 15 and ensuring adhesion and moldability with the base layer 15, Based transparent materials such as PCTG, PC, and PMMA that are excellent in chemical resistance and light resistance.

The pattern layer 12 is for realizing a sense of quality through the surface texture and pattern inherent in the real material. The pattern layer 12 may be selectively formed on the lower surface (or the back surface) of the upper and lower surfaces in order to secure and improve adhesion with the transparent layer 14 A non-woven fabric layer (not shown) made of an ester-based film or a non-woven fabric.

The base layer 15 is molded and fixed to the lower surface of the sandwich panel 11 (that is, the surface of the lower transparent layer) through insert injection, and is made of PC / ABS (polycarbonate / acrylonitrile-butadiene-styrene) or ABS (acrylonitrile-butadiene-styrene).

Such a garnish for automotive interior parts has a sandwich panel 11 having a pattern layer 12 at its center, thereby realizing texture of a real material and ensuring moldability and reliability of a real material. It is possible to prevent the post-distortion.

Hereinafter, the manufacturing process of the garnish for automotive interior parts constructed as described above will be described with reference to FIG.

The garnish 10 according to the present invention is manufactured by first fabricating a sandwich panel 11 for realizing a three-dimensional pattern and then forming a base layer 15 on the back surface of the sandwich panel 11. [

The sandwich panel 11 is manufactured by press molding and is formed into a three-layer structure by laminating a material of the upper transparent layer 13, the pattern layer 12 and the lower transparent layer 14 in the press mold M1 and press- Layer structure (for example, when the nonwoven fabric layer includes a nonwoven fabric layer which is additionally attachable to the back side of the pattern layer).

The transparent materials for forming the upper and lower transparent layers 13 and 14 are prepared in a sheet form and then put into a press mold M1 together with a real material for forming the pattern layer 12 and heated or preheated And is formed so as to have a predetermined thickness and shape through press molding in a state of being heated to a predetermined temperature.

The transparent material of the upper and lower transparent layers 13 and 14 adheres to the real material of the pattern layer 12 through press molding and the thickness thereof is adjusted. Thereafter, the sandwich panel 11 is manufactured through a trimming process.

The upper and lower transparent layers 13 and 14 are formed by adjusting the thickness to 0.5 to 5.0 mm depending on the application. The thickness of the upper transparent layer 13 is maximized to realize a surface depth feeling, 14) can minimize the thickness through thickness control, thereby reducing cost and weight.

Although the transparent layers 13 and 14 may be formed to have a thickness greater than 5.0 mm, when the thickness of the transparent layers 13 and 14 is thicker than 5.0 mm, the thicker the thickness, the longer the cooling time after molding, When the thickness is less than 0.5 mm, the flow of the material is not good, and the real material (pattern layer) is pushed or torn during press forming.

During the press-molding, the mold M1 can be formed with both a flat surface and a curved surface structure corresponding to a portion where the garnish is to be mounted (one side of the built-in part), wherein the curved surface is formed by cracks, It can be molded and applied to the limit receptacles where defects are not generated.

In the press forming step for manufacturing the sandwich panel 11, both the cold press and the hot press can be applied, and the molding is carried out at a temperature of 120 to 135 캜. Unevenness and bubbles may be generated on the surface during molding operation at a temperature outside the above-mentioned temperature range, resulting in appearance defects after molding.

In the case of hot pressing, the press molding is carried out in accordance with the material of the pattern layer 12, and in the case of hot pressing, the material for forming the pattern layer 12 and the transparent layers 13 and 14 and the transparent material The transparent material (transparent layer) is pre-heated before being inserted into the press mold M1 in the case of cold pressing. In the case of the cold press, the transparent material (transparent layer) is preheated Is inserted into the mold M1 together with the rear material (pattern layer), and the press molding is performed.

The upper and lower transparent layers 13 and 14 are formed using materials having a transmittance of 90% or more and satisfying the surface reliability (light resistance, scratch resistance, heat cycle resistance, moisture resistance, heat resistance and chemical resistance) of the sandwich panel 11 In particular, since the upper transparent layer 13 is formed on the upper side of the pattern layer 12 using a non-coated raw material, it is preferable to use a material satisfying the surface reliability.

The pattern layer 12 is formed using a real material to realize various colors, surface textures and patterns. Since the real material is located between the upper and lower transparent layers 13 and 14, cracks, A material which does not cause deformation of the material is used.

For example, real wood, real carbon and the like can be used as real materials, and natural materials such as branches and leaves, films, paper, wallpaper, and woven fabrics (fabric) are also applicable.

The thus fabricated sandwich panel 11 is taken out from the press mold M1 and inserted and fixed in the insert mold M2 so that a substrate layer material such as PC / ABS is injected into the mold M2, ).

The base layer 15 is for assembling and maintaining rigidity with a built-in part, and has an assembling structure for assembling with the built-in part, and fixes the sandwich panel 11 to one side of the built-in part.

Since the internal part to which the garnish is applied is required to have impact resistance and heat resistance, the base material layer 15 has a flexural strength of 1960 MPa and a tensile strength of 20 MPa to maintain basic stiffness and impact performance when applied to internal parts such as a crash pad and a door trim. 50 MPa, and a heat distortion temperature of 90 ° C or higher.

The base layer 15 is made of natural color in consideration of the color of the pattern layer material. In the case of some real materials such as real wood, It is possible.

As the material of the base layer 15, PC / ABS or ABS material is used. In the case of PC / ABS material, the ratio of PC to ABS is 7: 3 to 0: 100.

When the garnish of the present invention to be manufactured in this way is used for a crash pad garnish, a PC / ABS material having a PC: ABS ratio of 7: 3 is used in consideration of a head impact, and when used for a door garnish It is also possible to use ABS 100% material.

Meanwhile, the sandwich panel 11 can be manufactured by applying the hot press and the cold press described above according to the material of the pattern layer 12, and a pattern layer of a soft material such as a fiber, a soft film, It is preferable to form the pattern layer of the rigid material such as real wood, real carbon, and rigid film by preforming the pattern layer and the transparent layer, and then press molding.

The sandwich panel 11 including the pattern layer of soft material is laminated and inserted into the mold M1 in the order of the upper transparent material (upper transparent layer), the real material (pattern layer) and the lower transparent material (Hot pressing), and then a trimming process is performed to fabricate a sandwich panel (see FIG. 2).

The hot pressing is performed by pressing the upper and lower transparent layers 13 and 14 and the material of the pattern layer 12 immediately after lamination. The patterning of the pattern layer (for example, real wood, Real carbon, etc.), the pattern layer may be damaged.

Therefore, as shown in FIG. 3, the sandwich panel 11 including the pattern layer of the rigid material is formed by pre-forming the transparent layers 13 and 14 and then molding through a pressing process. The materials for the transparent layers 13 and 14 were preheated at a temperature of 120 to 135 DEG C for 40 to 45 minutes and then charged into the mold M1 and press molded to preform the upper and lower transparent layers 13 and 14, And then the preformed upper and lower transparent layers 13 and 14 are sequentially stacked in the mold M1 together with the material of the pattern layer 12 and heated up to press molding (hot pressing), and then the sandwich panel 11).

At this time, the material of the pattern layer 12 is not a sheet but is prepared in a predetermined shape having the same shape as the preformed transparent layers 13 and 14, and is then used in a hot press together with the transparent layers 13 and 14, Damage to one pattern layer is minimized.

After the sandwich panel 11 is manufactured, trimming is performed in accordance with the shape of the product before insertion into the injection mold M2, and the sandwich panel 11 having been trimmed is inserted into the injection mold M2. In the trimming process, trimming is performed in consideration of the appearance of the product and the appearance of the product.

Thereafter, the sandwich panel 11 is inserted and fixed on the moving mold side of the insert injection mold M2, and the base layer material is injected into the mold M2.

PC / ABS can be used as the material of the substrate layer 15 and the material is injected into the mold M2 at a nozzle temperature of 240 to 250 DEG C to form the base layer 15. At this time, The substrate layer 15 is injection-molded on the back surface of the sandwich panel 11 to prevent the surface layer (or the upper coating layer) of the substrate 11 from being damaged.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, And are included in the scope of the present invention.

10: Garish
11: Sandwich panel
12: pattern layer
13, 14:
15: substrate layer
M1: Press mold
M2: insert mold

Claims (11)

delete delete delete delete delete Stacking a transparent material for forming upper and lower transparent layers on both sides of a real material for forming a pattern layer, injecting the transparent material into a press mold, and press forming the sandwich panel;
Inserting and fixing the sandwich panel into an insert mold and injecting a base layer material into the insert mold to form a base layer on one side of the sandwich panel;
Lt; / RTI >
Wherein the upper and lower transparent layers are pre-heated to a predetermined temperature, pre-formed, and then put into a press mold through a pattern layer material.
The method of claim 6,
Wherein the substrate layer is injection-molded on the back surface of the sandwich panel in order to prevent the surface layer of the sandwich panel from being damaged by injection pressure.
The method of claim 6,
Wherein the press molding is performed at a temperature of 120 to 135 占 폚.
The method of claim 6,
Wherein the upper and lower transparent layers are formed to have a thickness of 0.5 to 5.0 mm.
delete The method of claim 6,
Wherein the base layer is formed in a natural color in consideration of the color of the pattern layer material.

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