Method for manufacturing interior components for vehicles using natural materials

Abstract

A method of manufacturing an interior component for a vehicle using a natural material includes bonding a plurality of laminated printing layers on a back surface of the natural material; injection molding an injection-molded product that processes a shape by placing the natural material in a mold and laminating the natural material onto the injection-molded product that is injected in a shape corresponding to the processed shape of the natural material; forming a translucent part that processes a symbol part on a front surface of the natural material, and forming the translucent part that protrudes in a shape of the symbol part;and attaching a light source unit to the injection-molded product, the light source unit being configured to be selectively illuminated through the light-transmitting portion in response to detecting a change in capacitance from the front side of the natural material;

Description

TECHNICAL FIELD

[0001] The present invention relates to a method for producing an interior component for a vehicle. BACKGROUND

[0002] Since interior materials for a vehicle require beautiful exterior design and luxurious texture, natural materials such as real wood, real aluminum, carbon fabric and mother of pearl have generally been used as materials to decorate the interior materials of a vehicle.

[0003] Real wood is often used as vehicle door panels, door panel switches, and other interior components because of its ability to convey a progressive and environmentally friendly image of a vehicle.

[0004] Nowadays, the conventional mechanical button is configured so that light emitted from a light-emitting diode (LED) is transmitted through an empty space of a button mechanism to transmit a surface of the button, and when a person mechanically and manually operates the button at the contact point, an electrical switching operation is thereby possible.

[0005] The light emitted by the LED is configured so that the button is made of a normal translucent plastic (polycarbonate (PC)) and has a transmittance for visible light (in the range of 5 to 18%).

[0006] In contrast to mechanical buttons, a touch electrode is made of a conductive material and is a device for detecting the on / off of a component by detecting a change in capacitance to an initial capacitance when a person's hand approaches. The touch electrode is advantageous because it can generate a larger capacitance due to the material's higher electrical conductivity.

[0007] The touch electrode may be applied to natural materials commonly used as door panels for a vehicle, door panel switches, and other interior components, and for this purpose, the application of a method to minimize, for example, breakage or external damage when molding the natural materials may be advantageous. SUMMARY

[0008] The present invention relates to a method of manufacturing an interior component for a vehicle using a natural material, and more particularly, to a method of manufacturing an interior component for a vehicle using a natural material that can minimize cracking and external damage by molding in consideration of the properties of the natural material.

[0009] The present invention aims to provide a method of manufacturing an interior component for a vehicle using a natural material, which can minimize breakage and external damage of the natural material by manufacturing in consideration of the properties of the natural material even when ensuring the visibility of a symbol on a front surface of the natural material by manufacturing the interior component for a vehicle using the natural material such as real wood and real stone, and manufacturing the interior component in which a symbol of a touch switch on the front surface of the natural material is transmitted to the outside by a light source.

[0010] A method of manufacturing an interior component for a vehicle using a natural material includes bonding a plurality of laminated printing layers on a back surface of the natural material; injection molding an injection-molded product that processes a shape by placing the natural material in a mold and laminating the natural material onto the injection-molded product that is injected in a shape corresponding to the processed shape of the natural material; forming a translucent part that processes a symbol part on a front surface of the natural material, and forming the translucent part that protrudes in a shape of the symbol part;and attaching a light source unit to the injection-molded product, the light source unit being configured to be selectively illuminated through the light-transmitting portion in response to detecting a change in capacitance from the front side of the natural material;

[0011] Injection molding of the injection molded product may comprise processing a shape of the natural material with simultaneous application of pressure and vacuum to the natural material during a state of heating of the mold.

[0012] Furthermore, the bonding may comprise bonding the plurality of laminated print layers comprising a nonwoven fabric to the back of the genuine material.

[0013] Furthermore, forming the translucent portion may include performing laser processing along a shape of the symbol portion printed on the front side of the natural material so that a translucent region is formed in the natural material; performing embossing that laminates a silicone cushion piece onto the front side of the natural material and allows the translucent region to extend into the silicone cushion piece; injecting a resin into the translucent region; curing the resin by irradiating the silicone cushion piece with ultraviolet radiation; and removing the silicone cushion piece from the natural material.

[0014] Performing the laser processing may include forming the translucent region at a defined depth including a full depth of the natural material, a full depth of the print layer, and a partial depth of the injection-molded product.

[0015] Furthermore, performing the embossing may include forming a plurality of translucent regions extending to a symbol processing portion of the front surface of the natural material in response to the symbol processing portion having the same shape as the symbol portion engraved in the silicone pad piece.

[0016] Furthermore, the resin injection may include supplying a resin to the plurality of light-transmitting regions by injecting the resin through a plurality of inflow paths formed in the silicone cushion piece.

[0017] Moreover, forming the translucent portion may further comprise applying a waterproofing agent to the front surface of the natural material in a state where the translucent portion is formed to protrude from the front surface of the natural material after removing the silicone pad piece.

[0018] Forming the translucent portion may include applying a film to the front side of the natural material on which the symbol portion is printed; performing laser processing along a shape of the symbol portion printed on the front side of the film so that a translucent region is formed in the natural material; injecting a resin into the translucent region; curing the resin by irradiating the film, including the translucent region, with ultraviolet radiation; and removing the film from the natural material.

[0019] Performing the laser processing may include forming the translucent region at a defined depth including a full depth of the natural material, a full depth of the print layer, and a partial depth of the injection-molded product.

[0020] Furthermore, injecting the resin may include supplying the resin to each of the plurality of translucent regions by injecting it through an inflow path connected to the translucent region.

[0021] Moreover, forming the translucent portion may further comprise applying a waterproofing agent to the front surface of the natural material in a state where the translucent portion is formed to protrude from the front surface of the natural material after removing the silicone pad piece.

[0022] Forming the translucent portion may include performing laser processing along a shape of the symbol portion printed on the front side of the natural material so that a translucent region is formed in the natural material; applying a resin to the front side of the natural material to form a resin layer on the front side of the natural material by pressing, which resin layer includes the translucent region; positioning the resin layer on a film in which the symbol portion is printed on a front side, and selectively curing the resin layer of the translucent region by irradiating with ultraviolet radiation; removing the film; and removing an uncured resin layer from the natural material.

[0023] Performing the laser processing may include forming the translucent region at a defined depth including a full depth of the natural material, a full depth of the print layer, and a partial depth of the injection-molded product.

[0024] Moreover, forming the translucent portion may further comprise applying a waterproofing agent to the front surface of the natural material in a state where the translucent portion is formed to protrude from the front surface of the natural material after removing the silicone pad piece.

[0025] The natural material can be real wood.

[0026] A method of manufacturing an interior component for a vehicle using natural material according to an embodiment of the present invention includes bonding a plurality of laminated printing layers on a back surface of the natural material; injection molding an injection-molded product that processes a shape by placing the natural material in a mold and laminating the natural material onto the injection-molded product that is injected in a shape corresponding to the processed shape of the natural material; and attaching a light source unit to the injection-molded product, the light source unit being configured to be selectively illuminated through the light-transmitting portion in response to detecting a capacitance change from the front surface of the natural material.

[0027] Injection molding of the injection molded product may comprise processing a shape of the natural material with simultaneous application of pressure and vacuum to the natural material during a state of heating of the mold.

[0028] Furthermore, the bonding may comprise bonding the plurality of laminated print layers comprising a nonwoven fabric to the back of the genuine material.

[0029] The natural material can be real stone.

[0030] According to an embodiment of the present invention, it is possible to minimize breakage and external damage of the natural material by manufacturing in consideration of the properties of the natural material while ensuring the visibility of the symbol on the front side of the natural material by manufacturing the interior component for a vehicle using the natural material such as real wood and real stone, and manufacturing the interior component in which the touch switch is mounted on the front side of the natural material and the symbol corresponding to the touch switch is transmitted from the front side of the natural material to the outside through the light source.

[0031] Furthermore, according to an embodiment of the present invention, it is possible to realize the homogeneity of illumination and the tactile sense for the symbol on the front side of the natural material by processing and assembling a light source module to allow the symbol to be transferred to the outside of the natural material by injection molding, which conforms to the shape of the natural material when the light source module is assembled.

[0032] It should be understood that terms such as "automobile" or "vehicle," as used herein, generally encompass motor vehicles, such as passenger cars, including sports utility vehicles (SUVs), buses, trucks, various commercial motor vehicles, watercraft, including a variety of boats and ships, aircraft, as well as hybrid vehicles, electric vehicles, plug-in hybrid electric vehicles, hydrogen-powered vehicles, and other alternative fuel vehicles (e.g., fuels derived from resources other than petroleum). A hybrid vehicle is a vehicle that has at least two power sources, such as both gasoline-powered and electric-powered vehicles. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The above and other features of the present invention will be described in detail with reference to certain exemplary examples thereof shown in the accompanying drawings, which are given by way of illustration and therefore do not necessarily limit the present invention: Fig. 1 is a view sequentially showing a method for manufacturing an interior component using a natural material according to an embodiment of the present invention; Fig. 2 is a view showing a printing layer in the method for manufacturing the interior component using the natural material according to an embodiment of the present invention; Fig. 3A and Fig. 3B are views illustrating a molding process of the natural material in the method of manufacturing the interior component using the natural material according to an embodiment of the present invention; Fig. 4 to 8 are views sequentially showing a first embodiment of a process for forming a light-transmitting portion in a method for manufacturing the interior component using the natural material according to an embodiment of the present invention; Fig. 9A and Fig. 9B are views illustrating the on and off states of a light source unit in the method of manufacturing the interior component using the natural material according to an embodiment of the present invention; Fig. 10 to 15 are views sequentially showing a second embodiment of a process for forming the light-transmitting portion in a method for manufacturing the interior component using the natural material according to an embodiment of the present invention; Fig. 16 to 21 are views sequentially showing a third embodiment of a process for forming the light-transmitting portion in a method for manufacturing the interior component using the natural material according to an embodiment of the present invention; Fig. 22, Fig. 24 and Fig. 25 are sequential views showing a method of manufacturing an interior component using a natural material according to an embodiment of the present invention; and Fig. 23 is a view showing a printing layer in a method of manufacturing the interior component using the natural material according to an embodiment of the present invention.

[0034] It should be understood that the accompanying drawings are not necessarily to scale and present a somewhat simplified representation of various preferred features illustrating the basic principles of the invention. The specific design features of the present invention as disclosed herein, including, for example, specific dimensions, orientations, positions, and shapes, may be determined in detail by the particular intended application and environment of use.

[0035] In the figures, like reference numerals refer to like or equivalent components of the present invention. DETAILED DESCRIPTION OF EXEMPLARY EMBODIMENTS

[0036] Embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Advantages and features of embodiments of the present invention and methods for achieving them will become clear with reference to embodiments described in detail below in conjunction with the accompanying drawings.

[0037] However, the present invention is not necessarily limited to the embodiments disclosed below and may be embodied in various other forms. These embodiments are provided merely to fully demonstrate the disclosure of the present invention and to fully inform those skilled in the technical field to which the present invention relates of the scope of the present invention, which scope of the present invention is defined by the appended claims.

[0038] Furthermore, in the description of the present invention, a detailed description may be omitted if it is determined that related, already known technologies may obscure the gist of the present invention.

[0039] Fig. 1 is a view sequentially showing a method for manufacturing an interior component using a natural material according to an embodiment of the present invention. Fig. 2 is a view showing a printing layer in the method for manufacturing the interior component using the natural material according to an embodiment of the present invention. Fig. 3A and Fig. 3B are views illustrating a molding process of the natural material in the method of manufacturing the interior component using the natural material according to an embodiment of the present invention.

[0040] Fig. 4 to 8 are views sequentially showing a first embodiment of a process for forming a light-transmitting portion in a method for manufacturing the interior component using the natural material according to an embodiment of the present invention. Fig. 9A and Fig. 9B are views illustrating the on and off states of a light source unit in the method of manufacturing the interior component using the natural material according to an embodiment of the present invention. Fig. 10 to 15 are views sequentially showing a second embodiment of a process for forming the light-transmitting portion in a method for manufacturing the interior component using the natural material according to an embodiment of the present invention. Fig. 16 to 21 are views sequentially showing a third embodiment of a process for forming the light-transmitting portion in a method for manufacturing the interior component using the natural material according to an embodiment of the present invention.

[0041] As in Fig. 1, a method of manufacturing an interior component for a vehicle using a natural material according to an embodiment will be sequentially described as follows.

[0042] First, a plurality of laminated printing layers 12 are bonded on a back surface of a natural material 10 (process S100).

[0043] This serves to minimize cracking and external damage to the natural material 10 due to, for example, an impact, by providing a buffer effect for the natural material 10 made of real wood by bonding a plurality of laminated printing layers 12, including a nonwoven fabric 12d, to the back of the natural material 10.

[0044] In other words, as in Fig. 2, the laminated printing layer 12 in one embodiment includes a carrier 12a, a primer and black ink 12b, a thermoplastic polyurethane (TPU) 12c, a nonwoven fabric 12d, and a deformable layer 12e, and as described above, the plurality of laminated printing layers 12 are formed by adding the nonwoven fabric 12d together with the TPU 12c which is made of an elastic material and is provided to absorb an impact, thereby providing a buffer for the real wood which is easily broken (damaged).

[0045] Subsequently, the natural material 10 is formed into a desired shape by being placed in a mold 1 consisting of an upper mold 1a and a lower mold 1b, and the natural material 10 is laminated onto an injection-molded product 20 that is injected in a shape corresponding to the processed shape of the natural material 10 (process S200).

[0046] As described above, for forming the natural material 10 including the printing layer 12, as shown in Fig. 3A, initially in a state in which the mold 1 is heated, as in Fig. 3B, the shape of the natural material 10 is machined by simultaneously applying pressure and vacuum to the natural material 10.

[0047] In other words, since in the related art, molding is performed by directly applying heat to a material, the material is damaged by this applied heat, and since, for example, a lifting phenomenon may occur after molding in a bent portion of a molded portion, the natural material 10 is processed by a molding process that takes into account the properties of the natural material 10, such as real wood or real stone, particularly in an embodiment with the operation of the mold 1 in a vertical direction by pressure and vacuum forming in a state of heating the mold 1, so that it is possible to not only improve the moldability of the natural material 10 but also minimize breakage and external damage of the natural material 10 compared with the related art.

[0048] Subsequently, in one embodiment, a symbol portion 11 is processed on a front side of the natural material 10, and a translucent portion 14 protruding in the shape of the symbol portion 11 is formed (process S300).

[0049] The first to third embodiments in which the light-transmitting portion 14 is formed on the natural material 10 will be described sequentially as follows. First embodiment

[0050] As in Fig. 4, in a first embodiment, laser processing is performed along the shape of the symbol portion 11 printed on the front side of the natural material 10 to form a translucent region A in the natural material 10.

[0051] In the first embodiment, during laser processing, the light-transmitting region A is processed to be formed at a selected or predetermined depth including all of the natural material 10, the printing layer 12, and a part of the injection-molded product 20, which enables the natural material 10 including the printing layer 12 and the injection-molded product 20 to be stably bonded without a gap when a resin 40 is injected and then cured.

[0052] As in Fig. 5 in a state where the light-transmitting region A is formed by laser processing, a silicone cushion piece 30 is laminated on the front surface of the material proper 10, and thus the light-transmitting region A extends to the silicone cushion piece 30.

[0053] In other words, when a symbol processing portion 32 having the same shape as the symbol portion 11 is engraved into the silicone cushion piece 30, a plurality of light-transmitting regions A are formed extending from the front surface of the natural material 10 to the symbol processing portion 32.

[0054] In the first embodiment, the translucent region A can also protrude by 0.2 cm from the front side of the natural material 10 because the symbol processing section 32 has engraved the symbol section 11 into the silicone cushion piece 30 at a depth of 0.2 cm.

[0055] As in Fig. 6, the resin 40 such as an epoxy resin is injected into each of the plurality of light-transmitting regions A in a state where the light-transmitting regions A extend.

[0056] In the first embodiment, the resin 40 is injected through a plurality of inflow paths 34 formed in the silicone cushion piece 30 so that the resin 40 is supplied to each of the plurality of light-transmitting regions A.

[0057] As in Fig. 7, the silicone cushion piece 30 is then irradiated with ultraviolet radiation to cure the resin 40 injected into the light-transmitting region A, and in the cured state, the silicone cushion piece 30 is also removed.

[0058] As in Fig. 8, in the first embodiment, when the silicone pad piece 30 is removed from the natural material 10, in a state where the translucent portion 14 formed by curing the resin 40 protrudes by 0.2 cm from the front surface of the natural material 10, a waterproofing agent is applied to the front surface of the natural material 10 by a waterproofing agent spraying device 2, so that the processing of the natural material 10 is completed.

[0059] In the first embodiment, for example, polyurethane (PU) with excellent shock absorption and waterproofing properties can be used as a waterproofing agent. Second embodiment

[0060] As in Fig. 10, in a second embodiment, a film 50 on which the symbol portion 11 is printed is applied to the front side of the natural material 10.

[0061] In the second embodiment, since the film 50 having a thickness of 0.2 cm is attached to the front side of the natural material 10, the translucent portion 14 can also protrude by 0.2 cm from the front side of the natural material 10 when the resin 40 injected into the translucent area A is later cured.

[0062] Then, as in Fig. 11, laser processing is performed along the shape of the symbol portion 11 printed on the front side of the natural material 10 to form the translucent region A in the natural material 10.

[0063] In the second embodiment, during laser processing, the light-transmitting region A is processed to be formed at a selected or predetermined depth including the entire film 50, the natural material 10, the printing layer 12, and a part of the injection-molded product 20, which allows the natural material 10 including the printing layer 12 and the injection-molded product 20 to be stably bonded without a gap when the resin 40 is injected and subsequently cured.

[0064] In a state where, as in Fig. 12, the light-transmitting region A is formed by laser processing, the resin 40, which corresponds to an epoxy in the second embodiment, is injection-molded into each of the plurality of light-transmitting regions A.

[0065] Then, as in Fig. 13, the film 50 containing the resin 40 is irradiated with ultraviolet radiation to cure the resin 40 injected in the light-transmitting areas A, and in the cured state, as shown in Fig. 14, the film 50 is removed from the front of the natural material 10.

[0066] In the second embodiment, as in Fig. 15, when the film 50 has been removed from the natural material 10, in a state where the light-transmitting portion 14 formed by curing the resin 40 protrudes by 0.2 cm from the front surface of the natural material 10, the waterproofing agent is applied to the front surface of the natural material 10 by the waterproofing agent spraying device 2, so that the processing of the natural material 10 is completed.

[0067] In the second embodiment, for example, polyurethane (PU) with excellent shock absorption and waterproofing properties can be used as a waterproofing agent. Third embodiment

[0068] As in Fig. 16, in a third embodiment, the laser processing is performed along the shape of the symbol portion 11 printed on the front side of the natural material 10 to form the translucent region A in the natural material 10.

[0069] In the third embodiment, during laser processing, the light-transmitting region A is processed to be formed at a selected or predetermined depth including all of the natural material 10, the printing layer 12, and a part of the injection-molded product 20, which allows the natural material 10 including the printing layer 12 and the injection-molded product 20 to be stably bonded without a gap when the resin 40 filled in the light-transmitting region A is subsequently cured.

[0070] As in Fig. 17, in a state where the light-transmitting region A has been formed by laser processing, the resin 40 (for example, an epoxy) is applied to the front surface of the natural material 10, and a resin layer having a selected or predetermined thickness is formed on the front surface of the natural material 10 including the light-transmitting region A by pressing.

[0071] In the third embodiment, the resin layer can be processed to be evenly applied to the front side of the natural material when the resin 40 applied to the front side of the natural material 10 is pressed by a slot die method, and in the third embodiment, as shown in Fig. 18, because the resin layer is formed on the front side of the natural material 10 in a thickness of 0.2 cm, when the resin 40 is later cured, the translucent portion 14 may also extend to protrude from the front side of the natural material 10 by 0.2 cm.

[0072] Subsequently, the film 50, in which the symbol portion 11 is printed on the front side, is positioned on the resin layer and, as in Fig. 18, the front surface of the natural material 10 including the film 50 is irradiated with ultraviolet radiation, so that the resin 40 filled in the light-transmitting region A is selectively cured.

[0073] As described above, in a state where the resin 40 is cured, as shown in Fig. 20, the film 50 and a resin layer not cured by the film 50 are sequentially removed from the natural material 10 with an air gun 3.

[0074] As in Fig. 21, in the third embodiment, when the film 50 and the uncured resin layer have been removed from the natural material 10, in a state where the light-transmitting portion 14 formed by curing the resin 40 protrudes from the front surface of the natural material 10 by 0.2 cm, a waterproofing agent is applied to the front surface of the natural material 10 by the waterproofing agent spraying device 2, so that the processing of the natural material 10 is completed.

[0075] In the third embodiment, for example, polyurethane (PU) with excellent shock absorption and waterproofing properties can be used as a waterproofing agent.

[0076] Now, when the processing of the natural material 10 by any one of the first to third embodiments as described above has been completed (process S300), a change in a capacitance on the front side of the natural material 10 is detected, and thus a light source unit for selectively emitting light through the light-transmitting portion 14 on a back side of the injection-molded product 20 (process S400), and as shown in the Fig. 9A and Fig. 9B, the light source unit can be turned on and selectively illuminated through the light-transmitting portion 14 when a change in capacitance is detected, for example, by a user's touch.

[0077] Although the light source unit is not shown in the drawing, in one embodiment, a substrate for mounting on the injection-molded product 20 is injected into a shape corresponding to the processed shape of the natural material 10, and a switching portion of the light source unit is formed on the substrate by laser processing, so that a plurality of components including electronic elements for detecting the capacitance change and turning on of the light source unit and connectors are mounted therein, so that it is possible to realize constant homogeneous illumination and tactile feeling along a curved surface of the natural material 10.

[0078] Fig. 22, Fig. 24 and Fig. 25 are sequential views showing a method of manufacturing an interior component using a natural material according to an embodiment of the present invention. Fig. 23 is a view showing a printing layer in a method of manufacturing the interior component using the natural material according to an embodiment of the present invention.

[0079] As in Fig. 22, a method of manufacturing an interior component for a vehicle using a natural material according to an embodiment will be sequentially described below.

[0080] First, as in Fig. 24, a plurality of printing layers 12 containing a symbol portion 11 are bonded to a back surface of a natural material 10 (process S100).

[0081] This serves to minimize cracking and external damage to the natural material 10 due to, for example, an impact, by providing a buffer effect for the natural material 10 made of real wood by bonding a plurality of laminated printing layers 12, including a nonwoven fabric 12d, to the back of the natural material 10.

[0082] In other words, as in Fig. 23, in one embodiment, the printing layer 12 comprises a substrate 12a composed of a water-based adhesive and a PET film, a primer and black ink 12b, a thermoplastic polyurethane (TPU) 12c, a nonwoven fabric 12d, and a deformable layer 12e, and as described above, the plurality of laminated printing layers 12 are formed by adding the nonwoven fabric 12d together with the TPU 12c made of an elastic material and provided to absorb an impact, thereby providing a buffer for the real wood that is easily broken (damaged).

[0083] The natural material 10 is then placed into the mold 1 and shaped into a desired form (see Fig. 3A and Fig. 3B), and as in Fig.25 for one embodiment, the natural material 10 is laminated to the injection-molded product 20, which is injected into the shape corresponding to the processed shape of the natural material 10 (operation S200).

[0084] In this embodiment, the injection-molded product 20 is shaped to transmit light, and since the natural material 10 made of real stone also has excellent light transmittance, in a state where the symbol part 11 is printed on the printing layer 12 and bonded to the back of the natural material 10 as described above, when the natural material 10 is laminated to the injection-molded product 20, light can transmit from the front of the natural material 10 and be illuminated in the shape of the symbol part 11 when the light source unit is turned on.

[0085] When the processing of the natural material 10 is completed (operation S200), in one embodiment, as described above, the change in capacitance on the front side of the natural material 10 can be detected, so that the light source unit for selectively emitting light through the light-transmitting part 14 is attached to the back of the injection-molded product 20 (operation S300), and thus the light source unit is turned on and selectively illuminated through the light-transmitting part 14 when the change in capacitance is detected, for example, by a touch of the user.

[0086] Although the light source unit is not shown in the drawing, in one embodiment, a substrate for mounting on the injection-molded product 20 is injected into a shape corresponding to the processed shape of the natural material 10, and the switching portion of the light source unit is formed on the substrate by laser processing, so that a plurality of components including electronic elements for detecting the capacitance change and turning on the light source unit and connectors are mounted therein, so that it is possible to realize constant homogeneous illumination and tactile feeling along a curved surface of the natural material 10.

[0087] According to an embodiment of the present invention, it is possible to minimize breakage and external damage of the natural material by manufacturing in consideration of the properties of the natural material while ensuring the visibility of the symbol on the front side of the natural material by manufacturing the interior component for a vehicle using the natural material such as real wood and real stone, and manufacturing the interior component in which the touch switch is mounted on the front side of the natural material and the symbol corresponding to the touch switch is transmitted from the front side of the natural material to the outside through the light source.

[0088] Furthermore, according to an embodiment of the present invention, it is possible to realize the homogeneity of illumination and the tactile sense for the symbol on the front side of the natural material by processing and assembling a light source module to allow the symbol to be transferred to the outside of the natural material by injection molding, which conforms to the shape of the natural material when the light source module is assembled.

[0089] The present invention has been described above with reference to the embodiments illustrated in the drawings, but it should be understood that these are illustrative only, so various modifications to the present invention may be made by those skilled in the art, and all or some of the above-described embodiments may also be configured in selective combinations thereof. Therefore, the technical scope of the present invention may be determined by the technical spirit of the appended claims.

Claims

[1] A method of manufacturing an interior component for a vehicle using natural material, comprising: Bonding a plurality of laminated printing layers on a backside of the natural material; Injection molding of an injection-molded product that processes a shape by placing the natural material in a mold and laminating the natural material onto the injection-molded product that is injected in a shape corresponding to the processed shape of the natural material; Forming a translucent portion processing a symbol portion on a front side of the natural material, and forming the translucent portion projecting in a shape of the symbol portion; and Attaching a light source unit to the injection-molded product, the light source unit being configured to be selectively illuminated through the translucent portion in response to detecting a change in capacitance from the front surface of the natural material. [2] The method according to claim 1, wherein the injection molding of the injection molded product comprises processing a shape of the natural material with simultaneous application of pressure and vacuum to the natural material during a state of heating the mold. [3] The method of claim 1, wherein said bonding comprises bonding said plurality of laminated print layers comprising a nonwoven fabric to the back of said genuine material. [4] The method of claim 1, wherein forming the translucent portion comprises: performing laser processing along a shape of the symbol portion printed on the front side of the natural material so that a translucent region is formed in the natural material; Performing an embossing that laminates a silicone padding piece to the front of the natural material and allows the translucent area to extend into the silicone padding piece; Injecting a resin into the translucent area; Curing the resin by irradiating the silicone pad with ultraviolet radiation; and Removing the silicone padding piece from the natural material. [5] The method of claim 4, wherein performing the laser processing comprises forming the light-transmitting region at a defined depth including a full depth of the natural material, a full depth of the printing layer, and a partial depth of the injection-molded product. [6] The method of claim 4, wherein performing the embossing comprises forming a plurality of light-transmitting regions extending to a symbol processing portion of the front surface of the natural material in response to the symbol processing portion having the same shape as the symbol portion engraved in the silicone cushion piece. [7] The method according to claim 4, wherein injecting resin comprises supplying a resin to the plurality of light-transmitting regions by injecting the resin through a plurality of inflow paths formed in the silicone cushion piece. [8] The method according to claim 4, wherein forming the light-transmitting portion further comprises applying a waterproofing agent to the front surface of the natural material in a state where the light-transmitting portion is formed to protrude from the front surface of the natural material after removing the silicone pad piece. [9] The method of claim 1, wherein forming the translucent portion comprises: Applying a film to the front of the natural material on which the symbol fragment is printed; Performing laser processing along a shape of the symbol portion printed on the front side of the film so that a translucent region is formed in the natural material; Injecting a resin into the translucent area; Curing the resin by irradiating the film with ultraviolet radiation, including the translucent area; and Removing the film from the natural material. [10] The method of claim 9, wherein performing the laser processing comprises forming the translucent region at a defined depth including a full depth of the natural material, a full depth of the printing layer, and a partial depth of the injection-molded product. [11] The method of claim 9, wherein injecting the resin comprises supplying the resin to each of the plurality of light-transmitting regions by injecting it through an inflow path connected to the light-transmitting region. [12] The method according to claim 9, wherein forming the light-transmitting portion further comprises applying a waterproofing agent to the front surface of the natural material in a state where the light-transmitting portion is formed to protrude from the front surface of the natural material after removing the silicone pad piece. [13] The method of claim 1, wherein forming the translucent portion comprises: performing laser processing along a shape of the symbol portion printed on the front side of the natural material so that a translucent region is formed in the natural material; Applying a resin to the front side of the natural material to form a resin layer on the front side of the natural material by pressing, which resin layer includes the translucent region; Positioning the resin layer on a film in which the symbol portion is printed on a front side, and selectively curing the resin layer of the translucent area by irradiation with ultraviolet radiation; Removing the film; and Removing an uncured resin layer from the natural material. [14] The method of claim 13, wherein performing the laser processing comprises forming the translucent region at a defined depth including a full depth of the natural material, a full depth of the printing layer, and a partial depth of the injection-molded product. [15] The method according to claim 13, wherein forming the light-transmitting portion further comprises applying a waterproofing agent to the front surface of the natural material in a state where the light-transmitting portion is formed to protrude from the front surface of the natural material after removing the silicone pad piece. [16] The method of claim 1, wherein the natural material is real wood. [17] The method of manufacturing an interior component for a vehicle using natural material, comprising: Bonding a plurality of laminated printing layers on a backside of the natural material; Injection molding of an injection-molded product that processes a shape by placing the natural material in a mold and laminating the natural material onto the injection-molded product that is injected in a shape corresponding to the processed shape of the natural material; and Attaching a light source unit to the injection-molded product, the light source unit being configured to be selectively illuminated through the translucent portion in response to detecting a change in capacitance from the front surface of the natural material. [18] The method of claim 17, wherein injection molding the injection molded product comprises processing a shape of the natural material with simultaneous application of pressure and vacuum to the natural material during a state of heating the mold. [19] The method of claim 17, wherein said bonding comprises bonding said plurality of laminated print layers comprising a nonwoven fabric to the back of said genuine material. [20] The method of claim 17, wherein the natural material is real stone.

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