KR102347995B1 - apparatus and method for manufacturing automotive interior material - Google Patents

Abstract

The present invention relates to an apparatus and method for manufacturing an automotive interior material. The apparatus for manufacturing an automotive interior material according to the present invention has an elastic frame formed between a fixed type and a movable type, and thus compresses the elastic frame after a melt being injected so as to allow the movable type to move forward further, thereby being able to pressurize the melt inside the cavity. The inside of the wood grain groove is completely filled with the melt, so that the interior material has the effect of materializing the same texture as that of natural wood.

Description

Apparatus and method for manufacturing automotive interior material

The present invention relates to an apparatus and method for manufacturing an automobile interior material, and more particularly, to an apparatus and method for manufacturing an automobile interior material having a surface texture of a natural material.

The interior materials of automobiles are one of the main factors that affect the marketability of automobiles. The interior materials of automobiles are mainly manufactured by the plastic injection method that can mass-produce the product shape precisely and accurately, and films of various designs are attached to the surface to improve the interior aesthetics.

Among them, an interior material with a wood grain pattern film attached to it to have the feel of natural wood is applied. However, such interior materials lacked a sense of luxury and gave a crude feeling because only the visually visible exterior looks like wood and the surface texture is smooth because of the film.

Therefore, irregularities in the same shape as the grain of wood are formed on the surface of the interior material so that the interior material can have the same texture as the actual wood tactilely.

To this end, as shown in FIG. 1 , a plurality of wood grain grooves 11 are formed on the inner surface of one mold 10 of the injection mold.

At the time of injection, first, a film 30 printed with a wood grain pattern is set on the inner surface of the mold 10 in which the wood grain groove 11 is formed, and then the molds 10 and 20 are combined, and then the plastic melt 40 is injected into the molds 10 and 20 through the injection hole 21 provided in the other mold 20 .

After that, it is released and taken out through a cooling process to produce a product (interior material).

However, as shown in FIG. 2 , the size of the wood grain grooves 11 is small, and since the entrance is blocked by the film 30 , the melt 40 does not sufficiently flow into the wood grain groove 11 , and thus the surface of the product Wood grain pattern irregularities are not clearly formed. Therefore, although the interior material has a visual grain pattern by the film 30, there is a problem in that it still has a different surface texture from that of natural wood.

Republic of Korea Patent Publication No. 10-1192271 (Notice on October 17, 2012)

Accordingly, the present invention has been devised to solve the above problems, and it is an object of the present invention to provide an apparatus and method for manufacturing an automobile interior material that can have a tactile texture of natural wood as well as a visual pattern.

According to the present invention for achieving the above object, there is provided an apparatus for manufacturing an automobile interior material, comprising: a fixed type and a movable type for forming a cavity in the shape of an interior material to be manufactured; a plurality of wood grain grooves formed on the inner surface of the fixed mold; and an elastic frame installed around the movable type and compressed between the fixed type and the movable type to contract and deform.

In addition, the movable type is inserted into the internal space of the fixed type to form an insertion portion forming a rear surface of the interior material, the elastic frame is installed to surround the circumference of the insertion portion.

In addition, the front and rear surfaces of the elastic frame are in close contact with each other in parallel to the fixed type and the movable type.

In addition, the elastic frame is provided with a dedicated driving device, it is installed to be able to move independently with respect to the movable type in the moving direction of the movable type.

In addition, the elastic frame slides on the outer surface of the movable insertion part.

In addition, the method for manufacturing an automobile interior material according to the present invention includes: a film setting step of adhering a film printed with a wood grain pattern to the inner surface of a fixed type in which a wood grain groove is formed; a step of advancing the movable type to form a cavity between the inner surface of the fixed type and the insertion part of the movable type, and adhering the elastic frame provided in the movable type to the fixed type; an injection step in which the plastic melt is injected into a cavity between the fixed mold and the movable mold through an injection hole formed in the movable mold; a compression step in which the movable type advances further while compressing the elastic frame so that the molten liquid inside the cavity is introduced and filled into the wood grain groove while pushing the film to the inner surface of the wood grain groove; a cooling step in which the melt is cooled and hardened; and a releasing and taking-out step in which the movable type is moved backward to separate the fixed type and the movable type, and at the same time, a take-out device provided in the fixed type is operated to take out the product.

In addition, between the film setting step and the mixing step, the elastic frame advancing step of first moving the elastic frame forward so that the volume of the cavity is increased by reducing the insertion depth of the insertion part may be further carried out.

In the step of advancing the elastic frame, the forward movement distance of the elastic frame is set as a value obtained by dividing the total volume of the wood grain groove by the area of the insertion part.

According to the present invention as described above, the molten solution is reliably injected into the wood grain groove of the mold, so that the target wood grain shape uneven shape is accurately formed on the surface of the interior material.

Therefore, the same texture as natural wood can be realized on the surface of the interior material, thereby improving the realism and luxury of the wood pattern interior material.

1 is a configuration and operation state diagram of a vehicle interior material manufacturing apparatus according to the prior art.
Figure 2 is an enlarged view of the main part of Figure 1;
Figure 3 is a configuration and operation state diagram of the vehicle interior material manufacturing apparatus according to the present invention.
Figure 4 is an enlarged view of the main part of Figure 3;
5 is a block diagram illustrating a method of manufacturing an automobile interior material carried out using the manufacturing apparatus of FIG. 3 .
6 is a view showing another embodiment of the vehicle interior material manufacturing apparatus according to the present invention.
7 is a block diagram illustrating a method of manufacturing an automobile interior material carried out using the manufacturing apparatus of FIG. 6 .

Since the present invention can have various changes and can have various embodiments, specific embodiments are illustrated in the drawings and described in detail. However, this is not intended to limit the present invention to specific embodiments, and it should be understood to include all modifications, equivalents and substitutes included in the spirit and scope of the present invention. The thickness of the lines or the size of components shown in the accompanying drawings may be exaggerated for clarity and convenience of explanation.

In addition, the terms to be described later are terms defined in consideration of functions in the present invention, which may vary according to the intention or precedent of the user or operator. Therefore, definitions of these terms should be made based on the content throughout this specification.

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

As shown in FIG. 3, the apparatus for manufacturing an automobile interior material according to the present invention includes a fixed type 10 and a movable type 20 that are combined with each other to form the same cavity as the interior material shape, and a plurality of formed on the inner surface of the fixed type 10 of the wood grain groove 11 , and an elastic frame 50 installed around the movable type 20 and compressed between the fixed type 10 and the movable type 20 .

An injection hole 21 for injecting a plastic melt into the cavity is formed in the movable type 20 .

Although it has been described above that the wood grain grooves 11 are formed in the fixed type 10 and the injection hole 21 and the elastic frame 50 are installed in the movable type 20, this may vary depending on the design of the mold. That is, the injection hole 21 and the elastic frame 50 are installed in the fixed type 10 , and the wood grain groove 11 can be formed in the movable type 20 . In the present specification, as shown in FIG. 3 , a case in which the wood grain groove 11 is formed in the fixed type 10 and the injection hole 21 and the elastic frame 50 are installed in the movable type 20 will be described as an example. .

The movable type 20 is linearly moved toward the stationary type 10 by a driving device (not shown). When the movable type 20 moves toward the stationary type 10 to form a union, a cavity identical to the shape of the interior material to be manufactured is formed between the stationary type 10 and the movable type 20 .

A plurality of wood grain grooves 11 are formed on the inner surface of the mold on the side that forms the outer surface of the interior material in the cavity, that is, the fixed mold 10 . The wood grain groove 11 is a plurality of grooves having different widths and depths formed in the shape of wood grain at irregular intervals. When you touch it, you can feel the texture that you can feel in real natural wood.

On the front side of the movable type 20 (the side facing the fixed type 10), the insertion part 22 is inserted into the fixed type 10 to form one side of the cavity to form the back side of the product (interior material). do.

The injection port 21 is communicated into the cavity through the insertion part 22 so that the plastic melt 40 can be injected into the cavity in the combined state.

The elastic frame 50 is installed in the form of completely enclosing the outer peripheral portion of the insertion portion 22 in the movable type (20). The cross-section of the elastic frame 50 is formed in a substantially rectangular shape. Therefore, the front and rear surfaces are parallel to each other and are in close contact with the corresponding surfaces of the fixed type 10 and the movable type 20, respectively, to receive a compressive force stably.

In addition, the elastic frame 50 is made of an elastic material so that the front and rear thickness (distance between the front and rear) can be contracted by the compressive force acting between the fixed type 10 and the movable type 20 . In addition, the contracted elastic frame 50 is expanded when the compressive force is removed and restored to its original state.

As a material of the elastic frame 50, engineering plastics or carbon fiber reinforced plastics having excellent heat resistance, mechanical rigidity, and elasticity may be used, and in particular, silicone rubber having excellent elasticity and heat resistance may be used.

Now, a method for manufacturing an automobile interior material according to the present invention will be described with reference to FIGS. 3 to 5 .

First, in the mold separation state as shown in Fig. 3 (a), a film setting step (S10) of adhering the film 30 to the inner surface of the fixed mold 10 in which the wood grain groove 11 is formed is performed. The film 30 has a wood grain pattern printed on the surface.

Then, as shown in Fig. 3 (b), the moving type 20 is advanced and the mixing step (S20) in which the moving type 20 is combined with the fixed type 10 is carried out. In the mixing step (S20), the insertion part 22 of the movable mold 20 is inserted into the fixed mold 10 to form a cavity for molding the product (interior material). The movable type 20 moves to a point where the front surface of the elastic frame 50 is in close contact with the rear surface of the fixed type 10 (a surface facing the elastic frame 50 as a rear peripheral portion of the fixed type 10).

After the mixing step (S20), the injection step (S30) is performed. In the injection step (S30), the plastic melt 40 is injected into the cavity through the injection hole (21). In this step (S30), the melt 40 is completely filled inside the cavity except for the wood grain groove 11 blocked by the film 30.

When the melt 40 injection is completed, the compression step S40 is performed as shown in FIG. 3(c). In the compression step (S40), the movable mold (20) moved primarily in the combining step (S20) is secondarily moved in the same direction. Since the elastic frame 50 is already in contact with the fixed mold 10 in the joining step (S20), the elastic frame 50 is contracted and deformed by the secondary movement of the compression step (S40) (L1 > L2). The moving distance of the movable type 20 due to the shrinkage deformation of the elastic frame 50 is only about 1 to 2 mm, but since the melt 40 has incompressibility, a very strong pressure is applied in the cavity.

Therefore, the molten liquid 40 flows into the inside of the wood grain groove 11 while pushing the film 30 to the inner surface of the wood grain groove 11 , and eventually, as shown in FIG. 4 , the film 30 is the wood grain groove 11 . It is closely attached to the inner surface and the melt 40 is completely filled in the inner space (see FIG. 4 ).

Thereafter, a cooling step (S50) is performed. As the molten liquid 40 is cooled while a predetermined time elapses, it is hardened to a state in which it can be taken out.

After the cooling step (S50), a mold release and extraction step (S60) is performed. In the releasing and taking-out step (S60), the movable type 20 is separated from the stationary type 10 and moved backward to return to the original position, and at the same time, the extraction device (not shown) provided in the stationary type 10 is operated by operating the fixed type (10). The product (interior material) is taken out from

According to the vehicle interior material manufacturing apparatus and manufacturing method according to the present invention as described above, the elastic frame 50 is provided between the fixed type 10 and the movable type 20, so that the movable type 20 is additionally added after the melt 40 injection. By advancing, it is possible to pressurize the melt 40 to a sufficient pressure.

Therefore, the molten solution 40 completely fills the inner space of the wood grain groove 11 while deforming the film 30 so that it closely adheres to the inner surface of the wood grain groove 11, thereby accurately forming the targeted wood grain concavo-convex shape on the surface of the interior material. do.

Accordingly, the vehicle occupant can feel the tactile texture as well as the visual pattern like natural wood on the surface of the interior material, thereby improving the realism and luxury of the interior material.

Meanwhile, the present invention may be modified as shown in FIGS. 6 and 7 .

The automobile interior material manufacturing apparatus shown in FIG. 6 is characterized in that the elastic frame 50 is movable in the same direction as the operating direction of the movable type 20 with respect to the movable type 20 .

To this end, the elastic frame 50 is provided with a driving device operated separately from the driving device of the movable type 20 . The actuator 60 of the elastic frame 50 driving device may be installed in the movable type 20 as shown in FIG. 6, or may be installed in another fixed part of the manufacturing apparatus located outside the movable type 20, of course.

As the actuator 60, a hydraulic cylinder, a motor, etc. may be used, and depending on the type, the actuator 60 is connected to the elastic frame 20 via a driving member 61 such as a rod or a lead screw as a medium to the elastic frame 50 ) can be moved back and forth in the same direction as the operating direction of the movable type 20 .

The automobile interior material manufacturing method using the manufacturing apparatus provided with the elastic frame 50 movable with respect to the movable type 20 as described above, as shown in FIG. 7, is elastic between the film setting step (S10) and the combining step (S20). The frame advancing step (S15) is characterized in that it is further implemented.

When the film setting step (S10) of setting the film 30 with the wood grain pattern printed on the inner surface of the fixed mold 10 as shown in FIG. 6(a) is completed, the elastic frame advancing step (S15) is performed.

As shown in Figure 6 (b), in the elastic frame advancing step (S15), the actuator 60 dedicated to the elastic frame 50 operates to move the elastic frame 50 via the driving member 61 to the fixed type (10) direction. It is a step to advance by a preset distance. The elastic frame 50 moves in a straight line toward the fixed type 10 while sliding along the outer surface of the insertion part 22 of the movable type 20 on its inner side.

The forward movement distance of the elastic frame 50 is a short distance of approximately 1 to 2 mm, and according to the advancement of the elastic frame 50 , between the rear surface of the elastic frame 50 and the corresponding surface of the movable type 20, the elastic frame 50 ), there is a gap C having the same size as the forward movement distance.

When the elastic frame advancing step (S15) is completed, the joining step (S20) is performed. As shown in FIG. 6(c), in the joining step (S20), the movable type 20 advances only to a position where the front surface of the elastic frame 50 is in close contact with the rear surface of the fixed type 10. As shown in FIG.

Therefore, as compared to the embodiment of Figure 3, the insertion part 22 of the movable type 20 is less inserted into the fixed type 10 by the moving distance of the elastic frame 50, and the volume of the cavity is increased by that amount to enter the cavity. The melt 40 can be further injected.

That is, the volume of the cavity is increased to additionally secure the amount of the melt 40 to be injected into the wood grain groove 11 in the compression step (S40) to be carried out later, and the cavity volume can be increased by that much. The forward movement distance of the elastic frame 50 is determined so that the

The forward movement distance of the elastic frame 50 can be obtained by dividing the 'total volume of the wood grain groove 11' by the area of the insertion part 22 . At this time, if the thickness of the film 30 cannot be ignored, it is natural that the volume occupied by the film 30 should be subtracted from the 'total volume of the wood grain grooves 11'.

After the mixing step (S20), the injection step (S30) is performed. In the injection step (S30), the melt 40 is filled into the cavity between the fixed mold 10 and the movable mold 20 through the injection hole 21.

At this time, the cavity volume between the fixed type 10 and the movable type 20 is increased by decreasing the insertion depth of the insertion part 22 by the elastic frame advancing step (S15).

Therefore, it is possible to further inject the molten liquid 40 necessary for filling the wood grain groove 11 in the cavity before the compression step (S40).

Thereafter, a compression step (S40) is performed as shown in FIG. 6(d). In the compression step (S40), the movable type 20 moves forward and comes into contact with the rear surface of the elastic frame 50 (the gap C is removed), and compresses the elastic frame 50 while further advancing (L1 > L2).

As the elastic frame 50 is compressed as much as the insertion part 22 is further inserted into the cavity, the pressure inside the cavity is greatly increased, and thus the melt 40 deforms the film 30 and the inside of the wood grain groove 11 and is completely filled in the inner space of the wood grain groove 11 .

Therefore, the wood grain pattern concave-convex shape intended for design is precisely formed on the surface of the product (interior material), so that the user can feel the texture like real wood when touched by hand.

Thereafter, the product is cooled and hardened in the cooling step (S50), and the molds 10 and 20 are separated and the product is taken out in the releasing and taking out step (S60) in the same manner as described above.

According to the automobile interior material manufacturing apparatus including the elastic frame 50 capable of moving forward from the movable type 20 as described above, and the vehicle interior material manufacturing method using this manufacturing apparatus, the elastic frame 50 is advanced by the movable type 20. By retracting the mating position, it is possible to increase the volume of the cavity by the total volume of the wood grain groove 11 .

Therefore, as the molten solution 40 in the cavity is filled in the wood grain groove 11 in the compression step (S40), the thickness of the cavity space is reduced, thereby preventing the phenomenon that the thickness of the product (interior material) is reduced than the design dimension.

As described above, the present invention has been described with reference to the embodiments shown in the drawings, which are merely exemplary, and those of ordinary skill in the art to which various modifications and equivalent other embodiments may be made You will understand that it is possible. Accordingly, the true technical protection scope of the present invention should be defined by the following claims.

10: fixed type 11: wood grain groove
20: mobile 21: inlet
22: insert 30: film
40: melt 50: elastic frame
60: actuator 61: driving member

Claims (8)

delete delete delete delete delete A film setting step (S10) of adhering a film printed with a wood grain pattern to the inner surface of the fixed type in which the wood grain groove is formed;
The moving type moves forward first, a cavity is formed between the inner surface of the fixed type and the insertion part of the movable type, and an elastic frame provided in the movable type is in close contact with the fixed type (S20);
an injection step (S30) in which the plastic melt is injected into the cavity between the fixed type and the movable type through an injection hole formed in the movable type;
a compression step (S40) in which the movable type advances second while compressing the elastic frame, and the molten liquid inside the cavity is introduced and filled into the wood grain groove while pushing the film to the inner surface of the wood grain groove;
a cooling step (S50) in which the melt is cooled and hardened;
The movable type is reversed so that the fixed type and the movable type are separated, and at the same time, the ejection device provided in the fixed type is operated to release and take out the product (S60);
Between the film setting step (S10) and the joining step (S20), the elastic frame advancing step (S15) of first moving the elastic frame forward so that the volume of the cavity is increased by reducing the insertion depth of the insertion part is further carried out ,
In the elastic frame advancing step (S15), the forward movement distance of the elastic frame is a value obtained by dividing the total volume of the wood grain groove by the area of the insertion part. delete delete

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