Skin material with display part and manufacturing method thereof

Abstract

To provide a skin material with a display part capable of being manufactured relatively easily.SOLUTION: A skin material (30) with a display part has a translucent display part (31) in which an icon (32) is lighted and displayed by transmitting a part of light (DL) emitted from a rear side to a front side. The skin material (30) is a slush molded article of a two-layer structure, and has a translucent layer (33) and a light shielding layer (35) laminated on a rear surface of the translucent layer (33). A translucent hole (37) in a shape corresponding to the icon (32) is formed at a portion corresponding to the translucent display part (31) of the light shielding layer (35).SELECTED DRAWING: Figure 9

Description

[Technical field]

[0001] The present invention relates to a display-equipped skin material and a method for producing the same. [Background technology]

[0002] Conventionally, lighting display devices that light up and display characters or patterns have been known. For example, Patent Document 1 discloses an interior part of a vehicle as such a lighting display device. The interior part disclosed in Patent Document 1 includes a skin material, a base material, and a lighting unit. The skin material has a display unit provided with a transparent pattern that transmits light.

[0003] The skin material is obtained by slush molding powdered TPU resin with added pigment. The substrate is provided on the back side of the skin material via a filler. An opening is formed in a predetermined position of the substrate. The lighting unit is disposed in the opening on the back side of the substrate and emits light toward the skin material. The light emitted from the lighting unit is irradiated onto the back side of the skin material through the opening in the substrate, and is transmitted through the transparent pattern of the skin material to the front side, thereby displaying letters and patterns on the surface of the skin material. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2020-196338 A Summary of the Invention [Problem to be solved by the invention]

[0005] Patent Document 1 describes that the transparent pattern of the skin material is formed by burning a part of the skin material with a laser processing machine. However, when attempting to form a transparent pattern by burning the skin material with a laser processing machine, it is necessary to irradiate the laser evenly to almost the entire skin material except for the transparent pattern, which is very time-consuming.

[0006] A possible method for providing a transparent pattern on a skin material is to form the skin material into a two-layer structure consisting of a light-transmitting layer and a light-shielding layer, and to form light-transmitting holes in the light-shielding layer in a shape corresponding to the transparent pattern. Such a skin material can be manufactured by providing a light-shielding layer by applying a light-shielding paint or attaching a light-shielding sheet to the back surface of the light-transmitting layer. However, such a manufacturing method requires processes other than the formation of the light-transmitting layer, such as the coating process of the paint or the attaching process of the sheet, and is thus time-consuming.

[0007] An object of the present invention is to provide a covering material with an indication portion that can be manufactured relatively easily. [Means for solving the problem]

[0008] In order to achieve the above object, in the present invention, the display-equipped skin material has a two-layer structure consisting of a light-transmitting layer and a light-shielding layer, and both layers are provided by slush molding.

[0009] Specifically, the first invention is directed to a skin material with an indicator. The skin material with an indicator of the first invention has a light-transmitting indicator that illuminates a predetermined visual pattern by transmitting a portion of light irradiated from the back side to the front side. The skin material is a slush molded product with a two-layer structure including a light-transmitting layer and a light-shielding layer laminated on the back side of the light-transmitting layer. A light-transmitting hole having a shape corresponding to the visual pattern is formed in a portion of the light-shielding layer that constitutes the light-transmitting indicator.

[0010] The second invention is directed to a method for manufacturing a skin material with a display unit. The method for manufacturing a skin material with a display unit of the second invention is a method for manufacturing a skin material with a display unit having a light-transmitting display unit that displays a predetermined visual pattern by transmitting a portion of light irradiated from the back side to the front side. The method for manufacturing the skin material includes the following steps: a first step of pouring a first resin raw material having light-transmitting properties into a slush molding die and providing a first molten resin layer made of the first resin raw material on a molding surface of the slush molding die; a second step of pouring a second resin raw material having light-blocking properties into the slush molding die with the first molten resin layer provided thereon and laminating a second molten resin layer made of the second resin raw material on the first molten resin layer; a third step of cooling and solidifying the first molten resin layer and the second molten resin layer provided in the slush molding die to form a light-transmitting layer formed by the solidification of the first molten resin layer and a light-blocking layer formed by the solidification of the second molten resin layer; and a fourth step of providing the light-transmitting display portion in a skin material that is a slush molding product having a two-layer structure having the light-transmitting layer and the light-blocking layer by removing a part of the light-blocking layer and forming a light-transmitting hole in the light-blocking layer having a shape corresponding to the visual pattern.

[0011] A third invention is the method for producing a skin material with an indication according to the second invention, wherein the fourth step is performed while the skin material is left in the slush molding die. In the fourth step, the portion of the light-shielding layer to be removed is positioned based on the position of the slush molding die.

[0012] A fourth invention is the method for producing a skin material with an indication according to the second invention, in which the fourth step is performed in a state where the skin material is removed from the slush molding die and set in an injection foaming mold for integrally molding a foam layer on the back side of the skin material. In the fourth step, the portion to be removed of the light-shielding layer is positioned based on the position of the injection foaming mold. Effect of the Invention

[0013] According to the first invention, the skin material has a light-transmitting layer and a light-shielding layer. A light-transmitting hole having a shape corresponding to a predetermined visual pattern is formed in a portion of the light-shielding layer corresponding to the light-transmitting display portion. When light is irradiated from the back side of the skin material, the light passes through the light-transmitting layer to the front side of the skin material through the light-transmitting hole. The light leaking to the front side through the light-transmitting hole projects and lights up the visual pattern on the light-transmitting display portion of the skin material. The skin material is a slush-molded product having a two-layer structure. Therefore, in manufacturing the skin material, it is not necessary to use a time-consuming processing technique such as baking by laser irradiation to provide a light-shielding portion in the skin material, and it is also not necessary to apply a paint having light-shielding properties to the back side of the light-transmitting layer or to attach a sheet forming a light-shielding layer. The skin material can be manufactured relatively easily by molding both the light-transmitting layer and the light-shielding layer by slush molding, and the only thing that remains is to form a light-transmitting hole in the light-shielding layer.

[0014] According to the second invention, both the light-transmitting layer and the light-shielding layer are slush molded using a common slush molding die, and then a light-transmitting hole is formed by removing a portion of the light-shielding layer to provide a light-transmitting indicator in the skin. This manufacturing method does not require the use of time-consuming processing techniques such as baking by laser irradiation to provide a light-shielding portion in the skin, and it is also not necessary to apply a light-shielding paint to the back surface of the light-transmitting layer or attach a sheet that forms a light-shielding layer. Therefore, the skin with an indicator can be manufactured relatively easily.

[0015] According to the third aspect of the present invention, the process of forming the light-transmitting holes in the light-shielding layer is performed while the skin material is left in the slush molding die. In this process, the portion of the light-shielding layer to be removed is positioned based on the position of the slush molding die. This ensures the positional accuracy of the light-transmitting indicator provided in the skin material.

[0016] According to the fourth aspect of the present invention, the process of forming the light-transmitting holes in the light-shielding layer is performed while the skin is set in the injection foaming mold. In this process, the portion of the light-shielding layer to be removed is positioned based on the position of the injection foaming mold. This ensures the positional accuracy of the light-transmitting indicator provided in the skin. [Brief description of the drawings]

[0017] [Figure 1A] FIG. 1A is a plan view illustrating a panel component according to an embodiment and a right half portion of a lighted display device including the panel component when the display is turned off. [Figure 1B] FIG. 1B is a plan view illustrating a panel component of the embodiment and a right half portion of a display device including the panel component when the display device is turned on. [Diagram 2] FIG. 2 is a cross-sectional view illustrating a main part of the light-emitting display device taken along line II-II in FIG. 1B. [Diagram 3] FIG. 3 is a cross-sectional view illustrating a main part of the light-emitting display device taken along line III-III in FIG. 1B. [Figure 4] FIG. 4 is an enlarged cross-sectional view showing a main part of the light display device surrounded by IV in FIG. [Diagram 5] FIG. 5 is a diagram showing how a slush molding die is heated in the production of a skin material. [Figure 6] FIG. 6 is a diagram showing a state in which a slush molding die is set in a first raw material storage box in the production of a skin material. [Figure 7] FIG. 7 is a diagram showing how the first resin raw material is applied in a molten state to the molding surface of the slush molding die by rotating the first raw material storage box together with the slush molding die in the production of a skin material. [Figure 8] FIG. 8 is a diagram showing a state in which a first slush molding die having a first molten resin layer provided on its molding surface is set in a second raw material storage box in the production of a skin material. [Figure 9] FIG. 9 is a diagram showing how the second resin raw material is applied in a molten state to the first molten resin layer by rotating the second raw material storage box together with the slush molding die in the production of the skin material. [Figure 10A] FIG. 10A is a cross-sectional view showing how light-transmitting holes are formed in a light-shielding layer of a skin material using a setting jig in the manufacture of the skin material, and the skin material in a state where a cutting process is performed after the light-transmitting holes are formed. [Figure 10B]FIG. 10B is a cross-sectional view showing a state in which a cutting process is performed on a skin material before light-transmitting holes are formed in the skin material during production, and a state in which light-transmitting holes are formed in the light-shielding layer of the skin material using a foam injection mold. [Figure 11] FIG. 11 is a cross-sectional view illustrating a step of fixing a translucent cushion material to a base material in the manufacture of a panel component. [Figure 12] FIG. 12 is a cross-sectional view illustrating a state in which a base material and a skin material are set in a foaming mold and the injection foaming mold is clamped in the manufacture of a lighted display device. [Figure 13] FIG. 13 is a cross-sectional view illustrating a state in which a foam layer is formed in the manufacture of a lighted display device. [Figure 14] FIG. 14 is a cross-sectional view illustrating a state in which an illumination unit and the like are attached to a panel component in the manufacture of a lighted display device. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0018] Exemplary embodiments will be described in detail below with reference to the drawings. In the following embodiments, a display-equipped covering material and a lighting display device using the same according to the present invention will be described as being applied to an interior part of a vehicle, taking an instrument panel as an example. Note that the drawings are intended to conceptually explain the present invention. Therefore, in the drawings, dimensions, ratios, or numbers may be exaggerated or simplified to facilitate understanding of the present invention.

[0019] <<Embodiment>> The light display device 1 of this embodiment is incorporated into an instrument panel 3 shown in Figures 1A and 1B. The instrument panel 3 is a panel including an instrument panel on which various devices such as an engine tachometer and a speedometer are mounted, and is installed at the front of the vehicle compartment. The instrument panel 3 of this example is for a left-hand drive vehicle. One side of the instrument panel 3 in the vehicle width direction (the left side portion not shown in Figures 1A and 1B) corresponds to the driver's seat, and the other side (the right side portion exemplified in Figures 1A and 1B) corresponds to the passenger seat.

[0020] -Configuration of lighting display device- As shown in FIGS. 2 and 3, the lighted display device 1 includes a panel component 5 and an illumination unit 40. The panel component 5 and the illumination unit 40 are arranged in a row and column.

[0021] <Panel components> The panel component 5, also shown in Figures 1A and 1B, is a foam-molded product and constitutes the upper panel of the instrument panel 3. The panel component 5 has a plurality of translucent indicator portions 31 (two translucent indicator portions 31 in this example). The translucent indicator portions 31 are provided at intervals from one another in the vehicle width direction. Note that, for the sake of convenience, the edges of each translucent indicator portion 31 are shown by two-dot chain lines in Figures 1A and 1B, but in reality, the edges of the translucent indicator portions 31 do not appear on the outside.

[0022] Each translucent display unit 31 constitutes an indicator light. Each translucent display unit 31 lights up and displays a predetermined icon 32 (for convenience, "A" and "B" are shown in FIG. 1B). The icon 32 is an example of a visual pattern. The icons 32 displayed by the multiple translucent display units 31 are different figures and indicate different in-vehicle systems. The indicator light formed by each translucent display unit 31 may indicate the operating state (operating / stopped) of the corresponding in-vehicle system depending on whether the icon 32 is lit or not.

[0023] The panel component 5 is a cushioned panel in which the light DL irradiated from the back side of the base material 10 passes through the light-transmitting display portions 31, thereby allowing the light-transmitting display portions 31 to light up. When the light DL is not irradiated from the back side of the base material 10, the light-transmitting display portions 31 have the same appearance as the portions other than the light-transmitting display portions 31, and the icons 32 cannot be seen. The panel component 5 has a soft-to-the-touch surface over substantially the entire panel component 5, including the light-transmitting display portions 31.

[0024] As shown in FIGS. 2 and 3, the panel component 5 includes a base material 10, a foam layer 20, a translucent cushion material 25, and a skin material 30.

[0025] <Base material> The substrate 10 is a resin plate-like object that forms the base of the panel component 5. The substrate 10 in this example is molded, for example, by two-color molding. The thickness of the substrate 10 is, for example, about 2.0 mm to 5.0 mm. The substrate 10 has a substrate main body 11 and a substrate light-transmitting portion 13.

[0026] The substrate body 11 has light-shielding properties. In this specification, "light-shielding properties" refers to a generally opaque property that blocks visible light. The substrate body 11 is made of a hard synthetic resin. Examples of materials for the substrate body 11 include polypropylene (PP), acrylonitrile-butadiene-styrene (ABS) resin, polycarbonate (PC), and a composite of polycarbonate (PC) and acrylonitrile-butadiene-styrene (ABS) (PC-ABS).

[0027] A plurality of bosses 17 (only two are shown in FIG. 3) are integrally formed on the back surface of the base body 11. Each boss 17 is located around a corresponding one of the plurality of light-transmitting display portions 31 and protrudes to the back surface of the base body 10. In this example, the plurality of bosses 17 are provided separately on both sides of the plurality of light-transmitting display portions 31. These plurality of bosses 17 are used as fixing portions for fixing the lighting unit 40 to the base body 10. Furthermore, an injection port 12 is formed at a predetermined position of the base body 11 so as to penetrate in the thickness direction.

[0028] The substrate light-transmitting portion 13 is provided at a position of the substrate 10 corresponding to each light-transmitting display portion 31. In this example, the substrate light-transmitting portion 13 is formed integrally with the substrate main body 11. The substrate light-transmitting portion 13 is separated for each light-transmitting display portion 31 and provided individually for each light-transmitting display portion 31. The substrate light-transmitting portion 13 has light-transmitting properties. In this specification, "light-transmitting properties" refers to the property of transmitting visible light. The substrate light-transmitting portion 13 constitutes the entire substrate 10 in the thickness direction, and transmits light DL related to lighting display.

[0029] The substrate light-transmitting portion 13 is made of a hard synthetic resin. Examples of the material of the substrate light-transmitting portion 13 include polycarbonate (PC), polymethyl methacrylate resin (PMMA), polypropylene (PP), and acrylonitrile butadiene styrene (ABS).

[0030] A plurality of recesses 15 are formed on the surface of the substrate 10. Each of the plurality of recesses 15 is a portion for fixing a translucent cushion material 25. A recess 15 is provided for each translucent display portion 31. Each recess 15 is formed by recessing the substrate translucent portion 13 of the substrate 10 and the substrate main body 11 portion surrounding the recess 15 toward the back side of the substrate 10. In this manner, each recess 15 is formed to be slightly larger than the substrate translucent portion 13. The depth of the recess 15 is, for example, about 1.0 mm to 3.0 mm.

[0031] <Foam layer> The foam layer 20 is provided on the front side of the base material 10. The foam layer 20 is a layer filled between the base material 10 and the skin material 30, and has both flexibility and elasticity. The foam layer 20 is formed by injection foam molding. The foam layer 20 is also filled between adjacent translucent cushion materials 25. The thickness of the foam layer 20 is about 3.0 mm to 10.0 mm. The foam layer 20 is made of foamed resin. Examples of materials for the foam layer 20 include foamed polyurethane (PU).

[0032] The foam layer 20 has a light-shielding property. The light transmittance of the foam layer 20 in the thickness direction is 1% or less. In this specification, the term "light transmittance" refers to the rate at which visible light is transmitted. The light transmittance of the foam layer 20 is measured using a commercially available transmittance meter in accordance with JIS K7361. As the transmittance meter, for example, a spectroradiometer SR-LEDW manufactured by Topcon Corporation is used.

[0033] The foam layer 20 has a relatively low hardness. The hardness of the foam layer 20 is measured using a commercially available hardness tester in accordance with JIS K7312. For example, an Asker rubber hardness tester C type manufactured by ASKER is used as the hardness tester. In this case, the surface hardness of the foam layer 20 is, for example, about 20 to 55.

[0034] <Translucent cushioning material> The light-transmitting cushion material 25 is provided at a portion of the foam layer 20 corresponding to each light-transmitting indicator portion 31. The light-transmitting cushion material 25 is a block-shaped member having both flexibility and elasticity. The light-transmitting cushion material 25 is separated for each light-transmitting indicator portion 31 and provided individually for each light-transmitting indicator portion 31. The light-transmitting cushion material 25 is fitted into the recess 15 of the substrate 10 and fixed to the substrate light-transmitting portion 13. The back surface of the light-transmitting cushion material 25 is attached to the bottom surface of the recess 15 using a bonding material 19.

[0035] The bonding material 19 is translucent and transmits the light DL related to the lighting display. The bonding material 19 may be, for example, a double-sided tape. The bonding material 19 may be an adhesive or a pressure sensitive adhesive such as an acrylic resin or an epoxy resin. The surface of the translucent cushion material 25 contacts the back surface of the skin material 30. The translucent cushion material 25 in this example presses the back surface of the skin material 30.

[0036] The light-transmitting cushion material 25 is made of a porous material. Examples of the material of the light-transmitting cushion material 25 include foamed silicone and non-yellowing urethane. The light-transmitting cushion material 25 may be made of a three-dimensional mesh, a highly expanded polypropylene sheet, or other members having cushioning properties.

[0037] The light-transmitting cushion material 25 has light-transmitting properties and transmits light DL related to lighting display. The light transmittance in the thickness direction of the light-transmitting cushion material 25 is 4% or more. The light transmittance of the light-transmitting cushion material 25 is measured in accordance with JIS K7312 using a commercially available transmittance meter (for example, a spectroradiometer SR-LEDW manufactured by Topcon Corporation) in the same manner as the light transmittance of the foam layer 20 described above.

[0038] The hardness of the light-transmitting cushioning material 25 is equal to or lower than the hardness of the foamed layer 20. The hardness of the light-transmitting cushioning material 25 is measured in accordance with JIS K 7312 using a commercially available hardness tester, similar to the hardness of the foamed layer 20 described above. As the hardness tester, for example, an Asker rubber hardness tester type C manufactured by ASKER Corporation is used. In this case, the surface hardness of the light-transmitting cushioning material 25 is, for example, about 20 to 55.

[0039] If the hardness of the light-transmitting cushion material 25 is higher than the hardness of the foam layer 20, the force with which the light-transmitting cushion material 25 presses the skin material 30 from the back side due to its elasticity will be relatively large. Therefore, there is a risk that the portion of the skin material 30 corresponding to the light-transmitting cushion material 25 will deform so as to bulge toward the front side. For this reason, the hardness of the light-transmitting cushion material 25 is set as described above.

[0040] <Skin material> The skin material 30 is provided with the foam layer 20 interposed between it and the base material 10. The skin material 30 covers the entire front side of the foam layer 20 and each of the light-transmitting cushion materials 25, and constitutes the design surface of the panel component 5. The outer peripheral edge of the skin material 30 is joined to the outer peripheral edge of the base material 10. The skin material 30 has a plurality of light-transmitting display sections 31. Each light-transmitting display section 31 is a section where an icon 32 is lit up by transmitting a portion of light DL irradiated from the back side to the front side, and functions as an indicator light.

[0041] The thickness of the skin material 30 is, for example, about 0.6 mm to 2.0 mm. The skin material 30 has a light-transmitting layer 33 and a light-shielding layer 35. The light-transmitting layer 33 and the light-shielding layer 35 are each made of a synthetic resin. The skin material 30 is a two-layer slush molded product, and is molded by two-layer slush molding. The two-layer slush molding is a molding method in which both the light-transmitting layer 33 and the light-shielding layer 35 are molded by slush molding.

[0042] The light-transmitting layer 33 is a layer that forms the base of the skin material 30. Examples of materials for the light-transmitting layer 33 include polyvinyl chloride (PVC), thermoplastic olefin (TPO), and thermoplastic urethane (TPU). The light-transmitting layer 33 contains a pigment, such as black, that has light-blocking properties. The amount of pigment contained in the light-transmitting layer 33 is relatively small. Therefore, the light-transmitting layer 33 has light-transmitting properties.

[0043] The light-transmitting layer 33 has a thickness of, for example, about 0.4 mm to 1.2 mm. The light transmittance of the light-transmitting layer 33 in the thickness direction is, for example, about 4% to 12%. The light transmittance of the light-transmitting layer 33 is measured in accordance with JIS K 7312 using a commercially available transmittance meter (for example, a spectroradiometer SR-LEDW manufactured by Topcon Corporation) in the same manner as the light transmittance of the foamed layer 20 described above.

[0044] The light-shielding layer 35 is laminated on the back surface of the light-transmitting layer 33 so as to extend over substantially the entire surface of the back surface. Examples of materials for the light-shielding layer 35 include materials similar to those for the light-transmitting layer 33, such as polyvinyl chloride (PVC), thermoplastic olefin (TPO), and thermoplastic urethane (TPU). The light-shielding layer 35 contains a relatively large amount of pigment, such as black, that has light-shielding properties. This allows the light-shielding layer 35 to have light-shielding properties.

[0045] The light shielding layer 35 has a thickness of, for example, about 0.2 mm to 0.8 mm. The light transmittance of the light shielding layer 35 in the thickness direction is, for example, approximately 0%. The light transmittance of the light shielding layer 35 is measured in accordance with JIS K 7312 using a commercially available transmittance meter (for example, a spectroradiometer SR-LEDW manufactured by Topcon Corporation) in the same manner as the light transmittance of the foamed layer 20 described above.

[0046] As shown in Fig. 4, light-transmitting holes 37 are provided in each portion of the light-shielding layer 35 constituting the light-transmitting display portion 31. The shape of the light-transmitting holes 37 corresponds to the shape of the icons 32 (the same shape as the icons 32). The light-transmitting holes 37 are formed, for example, by irradiation with laser light or end mill processing. The light-transmitting holes 37 allow the light DL to pass through. In this manner, the skin material 30 is configured to transmit the light DL through the portions corresponding to the light-transmitting holes 37.

[0047] The skin material 30 has a higher hardness than the foam layer 20 and the light-transmitting cushion material 25. The hardness of the skin material 30 is measured in accordance with JIS K 6253-3 using a commercially available hardness tester. For example, an ASKER rubber hardness tester Type A (manufactured by ASKER) is used as the hardness tester. In this case, the hardness of the skin material 30 is measured by stacking five skin materials 30 with a thickness of 1 mm, and is, for example, about 40 to 90.

[0048] -Lighting unit configuration- The lighting unit 40 is a component that illuminates each translucent display portion 31 of the panel component 5 from the back side. The lighting unit 40 is disposed on the back side of the panel component 5. The lighting unit 40 has a substrate 41, a light-shielding wall member 43, and a plurality of LEDs (Light Emitting Diodes) 45. The LEDs 45 are an example of a light source.

[0049] The substrate 41 is fixed to the bosses 17 on the substrate 10 by using tapping screws 47. The substrate 41 is positioned at an interval with respect to each substrate light-transmitting portion 13 of the substrate 10. The light-shielding wall member 43 is sandwiched and held between the substrate 41 and the substrate 10. The light-shielding wall member 43 has a light-shielding wall 44. The light-shielding wall 44 individually surrounds a portion of the space between the substrate 10 and the substrate 41 that corresponds to each substrate light-transmitting portion 13, and defines a light source chamber 49 for each light-transmitting display portion 31.

[0050] The LEDs 45 are mounted on the substrate 41 and disposed on the back side of the base material 10. The LEDs 45 are disposed in the respective light source chambers 49 and emit light DL (more precisely, visible light) toward the translucent display portion 31. The light DL emitted by the LEDs 45 is irradiated onto the panel component 5 from the back side of the base material 10. This light DL passes through the corresponding base material translucent portion 13 and the translucent cushioning material 25, and illuminates the translucent display portion 31 from the back side. The illumination light DL passes through the skin material 30 (translucent display portion 31) through the translucent hole 37, thereby projecting the icon 32. As a result, the translucent display portion 31 lights up and displays the icon 32.

[0051] -Manufacturing method for lighting display device- The manufacturing method of the lighted display device 1 includes a panel component manufacturing process and an assembly process.

[0052] <Panel component manufacturing process> The panel component manufacturing process is a process for manufacturing the panel component 5. The panel component manufacturing process includes a skin manufacturing process, a base material preparation process, a translucent cushion material fixing process, a setting process, and a foam layer molding process.

[0053] <Skin material manufacturing process> The skin manufacturing process is a process for manufacturing the skin material 30. In the skin manufacturing process, the skin material 30 is molded by two-layer slush molding. A shell-shaped slush molding die 101 is used to mold the skin material 30. The slush molding die 101 includes a molded main body portion 103 and a flange portion 105. The molded main body portion 103 is a main portion having a concave cross-sectional shape, and has a molding surface 107 on which the skin material 30 is molded. The flange portion 105 is provided around the entire periphery of the molded main body portion 103, that is, on the outer periphery of the die 101.

[0054] The skin material manufacturing process includes a mold heating step, a first raw material melting step, a second raw material melting step, a two-layer molding step, and a light-transmitting hole forming step. Here, the first raw material melting step corresponds to the first step. The second raw material melting step corresponds to the second step. The two-layer molding step corresponds to the third step. The light-transmitting hole forming step corresponds to the fourth step.

[0055] <Mold heating process> In the die heating step, as shown in FIG. 5, a slush molding die 101 is carried into a heating furnace 90, and the slush molding die 101 is heated to, for example, about 250° C. to 270° C. by upper and lower heaters 91 provided in the heating furnace 90.

[0056] <First raw material melting process> Next, a first raw material melting step is performed in which a first molten resin layer L1 is formed on the molding surface 107 of the slush molding die 101 from a first resin raw material R1, which is the material of the light transmitting layer 33, such as polyvinyl chloride (PVC).

[0057] As shown in Fig. 6, in the first raw material melting step, first, a heated slush molding die 101 is set in a first raw material storage box 110 with the molding surface 107 facing downward. At this time, a flange portion 105 of the slush molding die 101 is overlapped with a flange portion 111 forming the peripheral portion of the opening of the first raw material storage box 110. A first resin raw material R1 is stored in the first raw material storage box 110. The first resin raw material R1 is a light-transmitting powder.

[0058] Then, the flange portion 105 of the slush molding die 101 and the flange portion 111 of the first raw material storage box 110 are clamped by a clamping jig (not shown) provided on the side of the first raw material storage box 110. A first seal member 115 is provided around the entire periphery on the upper surface of the flange portion 111 of the first raw material storage box 110. When the slush molding die 101 is set in the first raw material storage box 110, the first seal member 115 is sandwiched between the mating surfaces of the flange portion 105 of the die 101 and the first raw material storage box 110, sealing the gap between them.

[0059] 7, the first raw material storage box 110 is rotated integrally with the slush molding die 101 around the horizontal first rotation axis 117 by a rotating device (not shown). As a result, the first resin raw material R1 in the first raw material storage box 110 is fed into the slush molding die 101. Then, the first resin raw material R1 is supplied to and adhered to the molding surface 107 of the slush molding die 101. The first resin raw material R1 adhered to the molding surface 107 is heated and melted by the mold temperature, forming a first molten resin layer L1 that becomes the light-transmitting layer 33. In this way, the first molten resin layer L1 made of the first resin raw material R1 is provided on the molding surface 107 of the slush molding die 101. Then, the slush molding die 101 is removed and separated from the first raw material storage box 110.

[0060] <Second raw material melting process> Next, a second raw material melting process is performed. The second raw material melting process is a process in which a second molten resin layer L2 is formed from a second resin raw material R2, which is a material for the light-shielding layer 35 such as polyvinyl chloride (PVC), on the first molten resin layer L1 on the molding surface 107 of the slush molding die 101.

[0061] As shown in Fig. 8, in the second raw material melting step, first, the slush molding die 101 with the first molten resin layer L1 provided thereon is set in the second raw material storage box 120 with the molding surface 107 (first molten resin layer L1) facing downward. At this time, the flange portion 105 of the slush molding die 101 is overlapped with the flange portion 121 forming the peripheral portion of the opening of the second raw material storage box 120. The second resin raw material R2 is stored in the second raw material storage box 120. The second resin raw material R2 is a powder having light-shielding properties.

[0062] Then, the flange portion 105 of the slush molding die 101 and the flange portion 121 of the second raw material storage box 120 are clamped by a clamping jig (not shown) provided on the second raw material storage box 120 side. A second seal member 125 is provided around the entire periphery on the upper surface of the flange portion 121 of the second raw material storage box 120. When the slush molding die 101 is set in the second raw material storage box 120, the second seal member 125 is sandwiched between the mating surfaces of the flange portion 105 of the die 101 and the second raw material storage box 120, sealing the gap between them.

[0063] Next, as shown in FIG. 9, the second raw material storage box 120 is rotated integrally with the slush molding die 101 around the horizontal second rotation axis 127 by a rotating device (not shown). As a result, the second resin raw material R2 stored in the second raw material storage box 120 is introduced. Then, the second resin raw material R2 is supplied to the first molten resin layer L1 on the molding surface 107 of the slush molding die 101 and adhered thereto. The second resin raw material R2 adhered to the first molten resin layer L1 is heated and melted together with the first molten resin layer L1 by the mold temperature, forming the second molten resin layer L2 that becomes the light-shielding layer 35. In this way, the second molten resin layer L2 made of the second resin raw material R2 is laminated on the first molten resin layer L1. Then, the slush molding die 101 is removed and separated from the second raw material storage box 120.

[0064] <Two-layer molding process> Next, a two-layer molding process is performed in which the light-transmitting layer 33 is molded from the first molten resin layer L1, and the light-shielding layer 35 is molded from the second molten resin layer L2, thereby obtaining the skin material 30, which is a two-layer slush molded product.

[0065] In the two-layer molding process, the first molten resin layer L1 and the second molten resin layer L2 provided in the slush molding die 101 are cooled and solidified. In this way, the first molten resin layer L1 is solidified to form the light-transmitting layer 33. At the same time, the second molten resin layer L2 is solidified to form the light-shielding layer 35. The first molten resin layer L1 and the second molten resin layer L2 are cooled, for example, by cooling the slush molding die 101 with cooling water. In this way, a two-layered skin material 30 is obtained in which the light-transmitting layer 33 and the light-shielding layer 35 are laminated.

[0066] <Transparent hole formation process> Next, a light-transmitting hole forming process is performed. The light-transmitting hole forming process is a process of providing the light-transmitting display portion 31 by removing a part of the light-shielding layer 35 of the skin material 30 to form a light-transmitting hole 37 having a shape corresponding to the icon 32. There are a first method and a second method for the light-transmitting hole forming process.

[0067] <First method> In the light transmitting hole forming step according to the first method, a slush molding die 101 is used to form light transmitting holes 37 in the light blocking layer 35 of the skin material 30.

[0068] Specifically, as shown in the upper diagram of FIG. 10A, the light transmitting holes 37 are formed while the skin material 30 is left in the slush molding die 101. The removal portion of the light blocking layer 35 is positioned based on the position of the slush molding die 101. In this example, the laser irradiation tool 201 irradiates the laser light LB to the positioned removal portion of the light blocking layer 35. This removes the light blocking layer 35 in the shape of the icon 32. This forms the light transmitting holes 37 in the shape corresponding to the icon 32 in the light blocking layer 35. Thereafter, the skin material 30 is demolded and taken out from the slush molding die 101. Furthermore, as shown in the lower diagram of FIG. 10A, a cutting process is performed to cut away the unnecessary portion 30a of the skin material 30, and the shape of the skin material 30 is adjusted.

[0069] <Second method> In the light-transmitting hole forming process by the second method, a light-transmitting hole 37 is formed in the light-shielding layer 35 of the skin material 30 using an injection foaming mold 150. The injection foaming mold 150 is a metal mold for integrally molding the foam layer 20 on the back side of the skin material 30.

[0070] Specifically, the skin material 30 is demolded and taken out from the slush molding die 101. Furthermore, as shown in the upper diagram of FIG. 10B, a cutting process is performed to cut away unnecessary portions 30a of the skin material 30, and the shape of the skin material 30 is adjusted. Then, as shown in the lower diagram of FIG. 10B, the skin material 30 is set on the second set surface 163 of the lower die 161 forming the injection foaming die 150. In this state, the light-transmitting hole 37 is formed. The removal portion of the light-shielding layer 35 is positioned based on the position of the lower die 161. In this example, the laser beam LB is irradiated from the laser irradiation tool 201 to the positioned removal portion of the light-shielding layer 35. As a result, the light-shielding layer 35 is removed in the shape of the icon 32. As a result, the light-transmitting hole 37 having a shape corresponding to the icon 32 is formed in the light-shielding layer 35.

[0071] <Translucent cushioning material fixing process> The light-transmitting cushion material fixing step is a step of fixing the light-transmitting cushion material 25 to the substrate light-transmitting portion 13 of the substrate 10. Here, in addition to the substrate 10 prepared in the substrate preparation step, a number of light-transmitting cushion materials 25 corresponding to the substrate light-transmitting portions 13 are prepared in advance.

[0072] 11, in the light-transmitting cushion material fixing step, first, a bonding material 19 is provided on the back surface of each light-transmitting cushion material 25 prepared in advance. Next, each light-transmitting cushion material 25 is fitted into the recess 15 of the substrate 10 and attached to the bottom surface of the recess 15, i.e., the surface of the substrate light-transmitting portion 13 and the surface of the substrate main body 11 around it, via the bonding material 19. In this way, the light-transmitting cushion material 25 is fixed in the recess 15 of the substrate 10.

[0073] <Setting process> The setting step is a step of setting the base material 10 to which the light-transmitting cushion material 25 is fixed and the skin material 30 in an injection foaming mold 150, as shown in the upper diagram of Fig. 12. The injection foaming mold 150 includes an upper mold 151 and a lower mold 161. The lower mold 161 is a fixed mold that does not basically move. The upper mold 151 is a movable mold that is arranged so as to be able to approach and move away from the lower mold 161.

[0074] The upper die 151 has a first set surface 153 on which the substrate 10 is set. A resin injection path 155 such as a direct gate is formed in the upper die 151. One end of the resin injection path 155 opens to the first set surface 153, and the other end of the resin injection path 155 opens to the outer surface of the upper die 151. A resin injector 157 (part of which is shown in FIG. 13) is detachably connected to the outer surface opening of the resin injection path 155. On the other hand, the lower die 161 is disposed below the upper die 151. The lower die 161 has a second set surface 163 on which the skin material 30 is set.

[0075] In the setting step, the base material 10 with the light-transmitting cushion material 25 is set on the first setting surface 153 of the upper mold 151. Specifically, the base material 10 is attached to the upper mold 151 so that the light-transmitting cushion material 25 is located on the opposite side to the first setting surface 153, that is, so that the front side of the base material 10 faces the same direction as the first setting surface 153. At this time, the opening of the resin injection path 155 on the first setting surface 153 corresponds to the injection port 12 formed in the base material main body 11.

[0076] The skin 30 is set on the second set surface 163 of the lower die 161. Specifically, the skin 30 is attached to the lower die 161 so that the light-shielding layer 35 is located on the opposite side to the second set surface 163, that is, so that the back surface of the skin 30 faces the same direction as the second set surface 163. The upper die 151 and the lower die 161 are then oriented so that the first set surface 153 and the second set surface 163 face each other. At this time, the light-transmitting cushion material 25 fixed to the base material 10 and the light-transmitting display portion 31 of the skin 30 are positioned so as to correspond to each other in the up-down direction.

[0077] In addition, the setting of the skin material 30 on the lower mold 161 is performed after the light transmission hole forming process when the light transmission hole forming process is performed by the first method, and is performed before the light transmission hole forming process when the light transmission hole forming process is performed by the second method.

[0078] <Foam layer molding process> The foam layer molding step is a step of integrally molding the foam layer 20 between the substrate 10 and the skin material 30. In the foam layer molding step, the upper die 151 is moved so as to approach the lower die 161, thereby clamping the injection foaming mold 150 as shown in the lower diagram of FIG. 12. As a result, a cavity FC is formed between the substrate 10 and the skin material 30 in the clamped injection foaming mold 150. At this time, the translucent cushion material 25 is pressed against and in contact with a part of the skin material 30 including the translucent display portion 31. Therefore, the translucent cushion material 25 and the skin material 30 are in close contact with each other, and the space between them is sealed.

[0079] Thereafter, the resin injector 157 is connected to the upper mold 151 and operated, and as shown in FIG. 13, a foaming resin raw material R3 such as a urethane foam raw material is injected into the cavity FC via the resin injection path 155 and the injection port 12 of the base material 10, and the foaming resin raw material R3 is foamed while being spread throughout the entire cavity FC. At this time, since the space between the light-transmitting cushion material 25 and the skin material 30 is sealed, the foaming resin raw material R3 is unlikely to enter between the light-transmitting cushion material 25 and the skin material 30. In addition, the light-transmitting cushion material 25 is also pressed against the bottom surface of the recess 15 via the bonding material 19. As a result, the foaming resin raw material R3 is unlikely to enter between the light-transmitting cushion material 25 and the base material 10.

[0080] Then, the foaming resin raw material R3 filled in the third cavity FC is cured. As a result, the foam layer 20 is integrally formed between the base material 10 and the skin material 30. In this way, the panel component 5 is formed in the injection foaming mold 150. Thereafter, the injection foaming mold 150 is opened so that the panel component 5 is held by the lower mold 161. The panel component 5 is then removed from the injection foaming mold 150. Thereafter, post-processing is performed to remove excess parts remaining on the panel component 5, such as gate residues and burrs.

[0081] In this manner, the panel component 5 can be manufactured.

[0082] <Assembly process> The assembly process is a process for assembling the lighted display device 1, as shown in Fig. 14. Here, in addition to the panel component 5 manufactured in the panel component manufacturing process, the components that constitute the lighting unit 40, that is, the LED-mounted board 41 on which the LEDs 45 are mounted and the light-shielding wall member 43, are prepared in advance.

[0083] In the assembly process, the light-shielding wall member 43 is placed against the rear surface of the panel component 5 (the rear surface of the base material 10) so that the portions corresponding to the base material light-transmitting portions 13 are individually surrounded by the light-shielding walls 44, and the LED-mounted board 41 is placed so that the light-shielding wall member 43 is sandwiched between the board 41 and the panel component 5. Then, the board 41 is fixed to each boss 17 of the base material 10 using tapping screws 47.

[0084] In this manner, the lighted display device 1 can be manufactured.

[0085] -Features of the embodiment- The skin material 30 of this embodiment has a light-transmitting layer 33 and a light-shielding layer 35. A light-transmitting hole 37 having a shape corresponding to the icon 32 is formed in a portion of the light-shielding layer 35 that constitutes the light-transmitting display portion 31. When light DL is irradiated from the back side of the skin material 30, the light DL passes through the light-transmitting layer 33 from the light-transmitting hole 37 to the front side of the skin material 30. The light DL leaking to the front side through the light-transmitting hole 37 causes the icon 32 to be projected and illuminated on the light-transmitting display portion 31 of the skin material 30.

[0086] The skin material 30 is a slush molded product with a two-layer structure. Therefore, in manufacturing the skin material 30, it is not necessary to use a time-consuming processing technique such as baking by laser irradiation to provide a light-shielding portion in the skin material 30, and it is also not necessary to apply a light-shielding paint to the back surface of the light-transmitting layer 33 or to attach a sheet that forms the light-shielding layer 35. The skin material 30 can be manufactured relatively easily by molding both the light-transmitting layer 33 and the light-shielding layer 35 by slush molding, and then only forming the light-transmitting holes 37 in the light-shielding layer 35.

[0087] In the manufacturing method of the skin material 30 of this embodiment, both the light-transmitting layer 33 and the light-shielding layer 35 are slush molded using a common slush molding die 101, and then a portion of the light-shielding layer 35 is removed to form a light-transmitting hole 37 and provide the light-transmitting display portion 31 in the skin material 30. According to this manufacturing method, it is not necessary to use a time-consuming processing technique such as baking by laser irradiation to provide a light-shielding portion in the skin material 30, and there is no need to apply a light-shielding paint to the back surface of the light-transmitting layer 33 or attach a sheet that forms the light-shielding layer 35. Thus, the skin material 30 can be manufactured relatively easily.

[0088] In the manufacturing method of the skin material 30 of this embodiment, when the light-transmitting hole forming step by the first technique is adopted, the processing for forming the light-transmitting holes 37 in the light-shielding layer 35 is performed in a state in which the skin material 30 remains in the slush molding die 101. In this processing, the portion to be removed of the light-shielding layer 35 is positioned based on the position of the slush molding die 101. This ensures the positional accuracy of the light-transmitting indicator 31 provided on the skin material 30.

[0089] In the manufacturing method of the skin material 30 of this embodiment, when the light-transmitting hole forming step by the second technique is adopted, the processing for forming the light-transmitting holes 37 in the light-shielding layer 35 is performed in a state in which the skin material 30 is set in the lower die 161 of the injection foaming mold 150. In this processing, the portion to be removed of the light-shielding layer 35 is positioned based on the position of the lower die 161. This ensures the positional accuracy of the light-transmitting indicator 31 provided on the skin material 30.

[0090] Other Embodiments In the above embodiment, the light-transmitting layer 33 and the light-shielding layer 35 constituting the skin material 30 each have a single-layer structure, but the present invention is not limited to this. The light-transmitting layer 33 may be formed by laminating a plurality of thin layers having light transmission properties by slush molding, so long as the light transmittance in the thickness direction as a whole can be made relatively high. The light-shielding layer 35 may be formed by laminating a plurality of thin layers that reduce transmitted light by slush molding, so long as the light transmittance in the thickness direction as a whole can be made relatively low, preferably substantially opaque.

[0091] In the above embodiment, the light-transmitting layer 33 has a gray-tone smoky color, but the gray-tone smoky color is merely one example, and any color can be adopted as the color of the light-transmitting layer 33 as long as the light-transmitting layer 33 transmits light DL.

[0092] In the above embodiment, the light-transmitting cushion material 25 is provided in contact with the back surface of the skin material 30, but this is not limited thereto. The light-transmitting cushion material 25 and the skin material 30 may face each other with a gap therebetween, with the foam layer 20 interposed therebetween. In this case, the foam layer 20 may be made of a semi-transparent foamed resin, and may transmit the light DL related to the lighting display in the portion between the light-transmitting cushion material 25 and the skin material 30.

[0093] Furthermore, when the foam layer 20 is provided between the light-transmitting cushion material 25 and the skin material 30, it is preferable that the hardness of the light-transmitting cushion material 25 is equal to or higher than the hardness of the foam layer 20. In this way, when the foaming resin raw material R3 forming the foam layer 20 is injected and foamed between the base material 10 and the skin material 30 in the manufacture of the panel component 5, the light-transmitting cushion material 25 can withstand pressure from the foaming resin raw material R3. This makes it possible to prevent the portion of the skin material 30 corresponding to the light-transmitting cushion material 25 from being deformed so as to bulge toward the front side due to the action of a restoring force due to the elastic return of the light-transmitting cushion material 25 after the foam layer 20 is formed.

[0094] In the above embodiment, the substrate light-transmitting portion 13 of the substrate 10 is molded integrally with the substrate body 11 by two-color molding, but the present invention is not limited to this. The substrate light-transmitting portion 13 may be formed of a cap member separate from the substrate body 11. For example, openings are formed in the portions of the substrate body 11 corresponding to the light-transmitting display portions 31. The cap members are light-transmitting and are attached to the substrate body 11 in a state of being fitted into the openings.

[0095] In the above embodiment, the substrate light-transmitting portion 13 is provided individually for each of the light-transmitting display portions 31, but this is not limited thereto. Only one substrate light-transmitting portion 13 may be provided in common for the plurality of light-transmitting display portions 31. That is, the substrate light-transmitting portion 13 may be continuous with the portions of the substrate 10 corresponding to the plurality of light-transmitting display portions 31, and may also be provided in portions of the substrate 10 corresponding to the spaces between adjacent light-transmitting display portions 31. Moreover, the entire substrate 10 may be made of a light-transmitting material.

[0096] In the above embodiment, a case where a plurality of translucent display units 31 are provided on the panel component 5 has been described as an example, but the present invention is not limited to this. The number of translucent display units 31 provided on the panel component 5 may be one.

[0097] In the above embodiment, the icon 32 is lit up on each light-transmitting display portion 31 of the panel component 5 according to the shape of the light-transmitting hole 37, but this is not limiting. The icon 32 is merely one example of a visual pattern, and the object lit up on the panel component 5 may be any figure, design, character, symbol, decorative pattern, etc. other than the icon 32 as long as it is perceptible by human vision, and any visual pattern can be adopted.

[0098] In the above embodiment, each translucent display portion 31 of the panel component 5 functions as an indicator light, but this is not limited thereto. For example, the panel component 5 may be configured to include a sheet-like touch sensor provided on the rear surface of the skin material 30 or on the front surface of the base material 10, and to detect a touch operation on the translucent display portion 31 by a user using the function of the touch sensor. Moreover, the panel component 5 may realize a switch function by incorporating a switch component that is operated by a user pressing the translucent display portion 31 instead of the touch sensor.

[0099] In the above embodiment, the display-equipped skin material and the lighting display device according to the present invention are described as being applied to the instrument panel 3, but the present invention is not limited to this. The display-equipped skin material and the lighting display device according to the present invention can also be applied to other vehicle interior parts, such as the lid of a console box, door trim, pillar trim, and sun visor. Furthermore, the display-equipped skin material and the lighting display device according to the present invention can also be widely applied to products other than vehicle interior parts, such as home appliances and furniture.

[0100] As described above, a preferred embodiment has been described as an example of the present invention. However, the present invention is not limited to this, and can be applied to embodiments in which appropriate changes, substitutions, additions, omissions, etc. are made. It will be understood by those skilled in the art that various further modifications of the above embodiment are possible without departing from the spirit of the present invention, and that such modifications also fall within the scope of the present invention.

[0101] Note that the descriptions "first," "second," etc., mentioned above are merely used to distinguish the words to which they are attached, and do not limit the number or order of the words. Also, the description "~" in the numerical ranges mentioned above means a range that includes the numerical values ​​before and after it. In other words, when X and Y are substituted for numerical values, the description "X~Y" indicates a range of "greater than or equal to X and less than or equal to Y." [Industrial Applicability]

[0102] INDUSTRIAL APPLICABILITY As described above, the present invention is useful for a display-equipped skin material and a manufacturing method thereof. [Explanation of symbols]

[0103] DL Hikari R1 1st resin raw material R2 Second resin raw material L1 First molten resin layer L2 Second molten resin layer 30 Skin material 31 Translucent display section 32 Icons (visual patterns) 33 Translucent layer 35 Light blocking layer 37 Transparent hole 101 Slush molding die 107 Molding surface 150 Injection foam mold

Claims

1. A display-equipped skin material having a light-transmitting display section (31) that illuminates and displays a predetermined visual pattern (32) by transmitting a portion of light (DL) irradiated from the back side to the front side, The slush molding has a two-layer structure including a light-transmitting layer (33) having light-transmitting properties and a light-shielding layer (35) having light-shielding properties laminated on a back surface of the light-transmitting layer (33), A light-transmitting hole (37) having a shape corresponding to the visual pattern (32) is formed in the portion of the light-shielding layer (35) that constitutes the light-transmitting display portion (31). A skin material with a display portion.

2. A method for manufacturing a display-equipped skin material (30) having a light-transmitting display section (31) that illuminates and displays a predetermined visual pattern (32) by transmitting a portion of light (DL) irradiated from the back side to the front side, comprising the steps of: a first step of introducing a first resin raw material (R1) having light-transmitting properties into a slush molding die (101) and providing a first molten resin layer (L1) made of the first resin raw material (R1) on a molding surface (107) of the slush molding die (101); a second step of introducing a second resin raw material (R2) having light-shielding properties into the slush molding die (101) having the first molten resin layer (L1) thereon, and laminating a second molten resin layer (L2) made of the second resin raw material (R2) on the first molten resin layer (L1); a third step of cooling and solidifying the first molten resin layer (L1) and the second molten resin layer (L2) provided in the slush molding die (101) to form a light-transmitting layer (33) formed by the solidification of the first molten resin layer (L1) and a light-shielding layer (35) formed by the solidification of the second molten resin layer (L2); and a fourth step of forming a light-transmitting hole (37) having a shape corresponding to the visual pattern (32) by removing a part of the light-shielding layer (35) from the skin material (30), which is a two-layer slush molded product having the light-transmitting layer (33) and the light-shielding layer (35), thereby providing the light-transmitting indication portion (31). A method for producing a skin material with a display portion, comprising:

3. The method for producing a display-equipped skin material according to claim 2, The fourth step is performed in a state where the skin material (30) is left in the slush molding die (101), In the fourth step, the portion to be removed of the light-shielding layer (35) is positioned based on the position of the slush molding die (101). A method for producing a skin material with a display portion, comprising:

4. The method for producing a display-equipped skin material according to claim 2, The fourth step is performed in a state where the skin material (30) is removed from the slush molding die (101) and set in an injection foaming die (150) for integrally forming a foam layer (20) on the back side of the skin material (30), In the fourth step, the portion to be removed of the light-shielding layer (35) is positioned based on the position of the injection foaming mold (150). A method for producing a skin material with a display portion, comprising:

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