JP2007050645A - Manufacturing method of solid decorative article - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a manufacturing method of a solid decorative article which can easily manufacture the same having a feel of natural wood and high designedness. <P>SOLUTION: The manufacturing method of the solid decorative article 11a has the printing process for printing a wood grain pattern planarly modelled after a wood surface on the film 13a and the molding process wherein the film 13a printed in the printing process is inserted into the mold 41 and subjected to in-mold molding. In the molding process, the mold 41, which has the uneven surface 45 complementary to the uneven shape sterically modelled after the wood surface, is used, and the film 13a is inserted into the mold 41 so that the wood grain pattern may correspond to the uneven surface 45. It is preferable that the uneven surface 45 has a maximum depth of 30-200 μm. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a method of manufacturing a three-dimensional decorative article having a design surface having a texture of wood and used for furniture, building materials, and the like, including interior parts of vehicles.

  DESCRIPTION OF RELATED ART Conventionally, the woodgrain member currently disclosed by patent document 1, 2 and its manufacturing method are known as a decoration product decorated with the woodgrain and its manufacturing method, for example. These woodgrain members include a recess formed on the surface of the urethane base material, a sealant embedded in the recess, and a color clear layer covering the surface of the urethane base material embedded with the sealant And an intermediate clear layer and a top clear layer. When manufacturing these woodgrain members, first, a first step of forming an in-mold coating layer in a mold having a woodgrain pattern is performed. Next, after performing a second step of injecting the urethane-based composition into the mold, a third urethane mold having a grain obtained by curing the urethane-based composition is taken out from the mold. And a fourth step of filling a colorant-containing sealing agent in the grain and providing a color clear layer on the layer.

  Further, in Patent Document 3, by applying transfer printing technology, a transfer foil composed of a base film, a colored layer, and an adhesive layer is integrally formed by in-mold transfer on the front surface or back surface of the resin layer. There is disclosed a resin-made pseudo wood panel for vehicle interior in which a pattern is transferred on the front or back surface. In this pseudo wood panel, the base film is removed after in-mold molding.

On the other hand, in Patent Document 4, a concavo-convex pattern is formed on the cavity surface of a mold, and a coating film is formed by spraying a coating from an inclined direction or a horizontal direction on the cavity surface. A molded product integrally provided with a coating film formed by introducing resin materials of different colors is disclosed. In addition, Patent Document 5 discloses a synthetic resin part for a gaming machine in which a fine uneven pattern is formed on the same surface as that which has been printed simultaneously with molding by an in-mold transfer method. . Incidentally, Patent Documents 6 and 7 disclose a method of manufacturing a molding etching mold mainly used when forming an uneven pattern on the cavity surface of the molding die as described above.
International Publication No. 99/28116 Pamphlet Japanese Patent Laid-Open No. 2001-18808 Japanese Patent Laid-Open No. 9-240386 JP-A-9-277304 JP 2003-111904 A JP-A-11-245233 JP-A-11-245234

  In the woodgrain member manufactured by the manufacturing method of Patent Documents 1 and 2, it is made to look like woodgrain by the planar arrangement of the sealant in contact with the color clear layer and the depth of embedding the sealant in the recess. Yes. However, the surface of the sealant in contact with the color clear layer is all flat so as to be along a plane parallel to the color clear layer, the intermediate clear layer and the top clear layer, and the surface of the top clear layer. Because of the flatness, it was not possible to feel a sufficient three-dimensional effect in the wood grain observed through these clear layers. Furthermore, in these wood-tone members, a thick clear layer is formed on the surface of the sealant, which makes the luster feel extremely strong and relatively reduces the texture of natural wood. It was. Similarly, the pseudo-grain panel manufactured by the manufacturing method of Patent Document 3 does not give a sufficient three-dimensional effect.

  The present inventors have conducted intensive research in order to meet the demand for natural wood texture that has been increasing in recent years. As a result, the present inventors have succeeded in producing a three-dimensional decorative article having a natural wood texture by a production method different from the conventional technique as described above. And based on these knowledge, it came to complete this invention.

  An object of the present invention is to provide a method for producing a three-dimensional decorative article that can easily produce a three-dimensional decorative article having a natural wood texture and a high design property.

  In order to achieve the above object, the invention according to claim 1 is a method of manufacturing a three-dimensional decorative article having a design surface having a texture of wood, and the method planarizes the surface of the wood. A printing process for printing the engraved pattern on the film, and a molding process for in-mold molding by inserting the film printed in the printing process into a mold. In the molding process, The mold having a concavo-convex surface complementary to the concavo-convex shape which is three-dimensionally shaped on the surface is used, and the film is inserted into the mold so that the grid pattern corresponds to the concavo-convex surface. The gist is to do.

  According to this method, in the molding step, the grid pattern that is a planar representation of the surface of the wood is made to correspond to the irregular surface that is complementary to the irregular shape that is a three-dimensional representation of the surface of the wood. In-mold molding is performed with the film inserted into the mold. For this reason, since the design surface of the three-dimensional decoration to be manufactured has an uneven shape that three-dimensionally represents the surface of the wood, it has a texture of natural wood visually and tactilely. Furthermore, on the design surface of the three-dimensional decorative product to be manufactured, since the grid pattern of the film is arranged so as to correspond to the uneven shape of the design surface, the visual three-dimensional effect is further enhanced, and natural wood It will make you feel strongly. Therefore, according to this method, it is possible to easily manufacture a three-dimensional decorative product with high design that can make the texture of natural wood feel visually and tactilely.

The manufacturing method of the three-dimensional ornament according to claim 2 is summarized in that, in the invention according to claim 1, the uneven surface has a maximum depth of 30 to 200 μm.
According to this method, since the design surface of the three-dimensional decorative article to be manufactured has a concavo-convex shape having a maximum height of 30 μm or more, a high three-dimensional effect is provided visually and tactilely. Furthermore, since the maximum height of the design surface of the three-dimensional decoration to be manufactured is 200 μm or less, it is easy to form the film in a shape along the uneven surface of the mold.

  The method for producing a three-dimensional ornament according to claim 3 is the invention according to claim 1 or 2, wherein the grid pattern includes a plurality of annual ring lines that are modeled on the annual rings of the wood. The uneven surface includes a plurality of mold long groove portions and a mold ridge portion that three-dimensionally represent the annual rings of the wood, and in the molding step, the annual ring lines are connected to the mold long groove portions and the mold. The gist is to insert the film into the mold so as to be arranged along the ridge.

  According to this method, the design surface of the three-dimensional decorative article to be manufactured is provided with the annual ring line extending along the ridge-shaped and elongated groove-shaped uneven shape, and thus the annual ring line is conspicuous by the uneven shape. Become visible. Therefore, the visual three-dimensional effect is further enhanced, and a design surface that strongly feels the texture of natural wood is formed.

  According to a fourth aspect of the present invention, there is provided a method for manufacturing a three-dimensional decorative article. In the invention according to the third aspect, the grid pattern includes a plurality of conduit lines that are modeled on the conduit portion of the wood. The conduit line is disposed so as to extend along the annual ring line between the adjacent annual ring lines, and the uneven surface includes a plurality of mold unevenness that three-dimensionally represents the conduit portion of the wood, The gist of the molding step is to insert the film into the mold so that the conduit lines correspond to the mold irregularities.

  According to this method, the design surface of the three-dimensional decorative product to be manufactured has a fine uneven shape that three-dimensionally represents the conduit part of the wood in addition to the uneven shape that three-dimensionally represents the annual rings of wood. It will be prepared. The minute uneven shape imparts a texture like a rough wood to the design surface of the three-dimensional decorative product, and therefore gives a feel closer to that of natural wood. Furthermore, since the design surface of the three-dimensional decorative article to be manufactured includes a conduit line arranged so as to correspond to the minute uneven shape, the conduit line becomes conspicuous, and the visual three-dimensional effect is further improved. It will be even higher.

  ADVANTAGE OF THE INVENTION According to this invention, the manufacturing method of the three-dimensional decoration which can manufacture easily the highly decorative three-dimensional decoration which has the texture of natural wood can be provided.

Hereinafter, the embodiment which materialized the manufacturing method of the three-dimensional decoration of the present invention is described in detail.
First, the three-dimensional decoration manufactured with the manufacturing method of this embodiment is demonstrated.
As shown in FIGS. 1 (a) to (c) and FIGS. 2 (a) to (c), the first three-dimensional decoration 11a of the present embodiment includes a resin-made base material 12 and the base material 12. And a first film 13a covering the surface. On the other hand, as shown to Fig.3 (a)-(c), the 2nd three-dimensional decoration 11b of this embodiment is a 1st film shown to Fig.1 (a) in said 1st three-dimensional decoration 11a. 13a is changed to the second film 13b shown in FIG. 3 (a). That is, the second three-dimensional decorative article 11 b includes a resin base 12 and a second film 13 b that covers the surface of the base 12.

  These first and second three-dimensional decorations 11a and 11b are all of an automobile such as a main body of an instrument panel, a door of a grab box, a lid portion of a console box, a rim portion of a steering wheel, and an upper surface of an armrest. Used for interior materials. In these three-dimensional decorations 11a and 11b, the surfaces on the side of the films 13a and 13b decorated in a three-dimensional grid pattern (hereinafter referred to as design surfaces of the three-dimensional decorations 11a and 11b) touch the occupant's vision. It arrange | positions in the vehicle interior of a motor vehicle so that it may function as a design surface.

Next, the first three-dimensional decoration 11a will be described.
As shown in FIG. 1 (a), the design surface of the first three-dimensional decoration 11a is decorated in a three-dimensional grid pattern having a large number of grain 17 arranged so as to surround a plurality of node portions 16. Has been. In the design surface of the three-dimensional decoration 11a, a portion excluding the node portion 16 is a general portion 18. The node portion 16 is an image of a node of wood, and the wood grain 17 is an image of the front or plate of wood. The wood grain 17 forms a bird's eye pattern that vortexes around the joint 16 at the periphery of each joint 16, and at a position away from the joint 16, a wood grain such as a regular or plank A pattern is formed. In other words, in the present embodiment, the grid pattern is composed of a bird's eye pattern and a wood grain pattern. Incidentally, the general part 18 has a summer part and a winter part corresponding to the summer and winter eyes of wood.

  As shown in FIG. 1 (b), the checkerboard pattern is constituted by an uneven shape formed three-dimensionally on the design surface of the first three-dimensional decorative article 11a, and as shown in FIG. 2 (a), It is comprised by the 1st cell pattern 21a printed planarly on the 1st film 13a. As shown in FIG.1 (b), the uneven | corrugated shape is formed by arrange | positioning so that the 1st film 13a may be closely_contact | adhered along the unevenness | corrugation 22 formed in three dimensions on the surface of the base material 12. FIG. .

  The irregularities 22 are formed in a shape that three-dimensionally represents the surface of the wood. Here, three-dimensionally imitating the surface of wood means three-dimensionally transferring a three-dimensional structure formed when wood such as timber is exposed to wind and rain for a long time. It is possible to transfer a three-dimensional shape in which the nodes and annual rings are raised and the part corresponding to the conduit is recessed. When the surface of the wood is three-dimensionally depicted, it is possible to transfer a deformed shape of a three-dimensional structure such as a node or an annual ring as necessary. In the present embodiment, the unevenness 22 includes a large number of ridge portions 26 having a ridge shape and a large number of long groove portions 27 having a long groove shape. Furthermore, as schematically shown in FIG. 1C, the unevenness 22 has a large number of at least one selected from a minute concave portion and a minute convex portion between the adjacent ridge portion 26 and the long groove portion 27. A minute unevenness 28 is provided.

  Each minute unevenness 28 is formed in a short line shape such as a long square shape or an elliptical shape when viewed from the surface side of the base material 12, and is an intermediate portion between the adjacent ridge portion 26 and the long groove portion 27. , The ridge portion 26 or the long groove portion 27 is formed so as to extend. The length in the longitudinal direction of each micro unevenness 28 is longer than the length (width) in the width direction, and preferably 1 in the width direction in order to approximate the shape of the conduit portion existing in natural wood. It is formed 10 times. On the other hand, both the ridge portion 26 and the long groove portion 27 are formed in a linear shape continuously extending over a distance longer than the length of the minute unevenness 28 in the longitudinal direction.

  In the present embodiment, the maximum height Hm of the irregularities 22 is formed to be 30 to 200 μm. In addition, the maximum height Hm of the unevenness | corrugation 22 shown by FIG.1 (c) is 200 micrometers which is a height difference between the upper end of the node part 16, and the lower end of the general part 18. As shown in FIG. Incidentally, in FIG. 1C, the height (the difference in height between the upper end and the lower end) Hb of the node portion 16 forming the bird's eye pattern is 10 to 30 μm, and a relatively flat portion in the general portion 18. The height Hf is 20 to 100 μm, and the height Hf of the portion corresponding to the winter eye portion in the general portion 18 is 15 to 40 μm. Further, the height of the minute irregularities 28 is preferably 20 to 100 μm in order to approximate the three-dimensional shape of the conduit portion existing in natural wood.

  As shown to Fig.2 (a), the 1st cell pattern 21a provided with many annual ring lines 31 is printed on the surface of the 1st film 13a. The annual ring line 31 is composed of a curve that is a planar representation of an annual ring of wood. Here, to represent the annual rings of wood in a two-dimensional manner means to two-dimensionally transfer the planar structure of the surface of the wood such as square wood, and is obtained when, for example, the surface of the square wood is photographed. Such a two-dimensional shape can be transferred. In addition, in the case where the annual ring of wood is modeled in a plane, it is possible to transfer a deformed shape of the planar structure of the annual ring as necessary. However, the first grid pattern 21a is a pattern in which the same surface of the wood as the irregularities 22 of the substrate 12 is printed.

  As shown in FIGS. 2B and 2C, the first film 13 a is three-dimensionally arranged along the surface of the substrate 12 so that the first grid pattern 21 a corresponds to the irregularities 22. Has been. As a result, the first grid pattern 21a printed on the first film 13a is arranged so that each annual ring line 31 is vertically aligned with the ridge part 26 and the long groove part 27 of the base material 12, respectively. ing.

Next, the second three-dimensional decorative article 11b will be described focusing on differences from the first three-dimensional decorative article 11a.
As shown in FIGS. 3 (b) and 3 (c), the design surface of the second three-dimensional decorative article 11b is further provided with a three-dimensional pipe part of wood in addition to the grid pattern of the first three-dimensional decorative article 11a. The pattern is in the form of a decoration. The conduit part is a part of a wooden conduit that is exposed on the surface of the wood, and is a linear structure that is characteristic of Lauan wood. The checkered pattern of the second three-dimensional decorative product 11b is constituted by an uneven shape formed three-dimensionally on the design surface of the second three-dimensional decorative product 11b, and is printed on the second film 13b in a plane. It is constituted by the second square pattern 21b. The uneven shape is formed by placing the second film 13b in close contact with the unevenness 22 formed in three dimensions on the surface of the substrate 12.

  As shown to Fig.3 (a), it arrange | positioned on the surface of the 2nd film 13b so that it may extend along this annual ring line 31 in the middle part of many annual ring lines 31 and the adjacent annual ring line 31. A second grid pattern 21b having a large number of conduit lines 32 is printed. The conduit line 32 is composed of a linear structure that embodies the above-mentioned conduit portion in a plane, and more specifically, is composed of a linear structure that embodies the above-described minute irregularities 28 in a plane. Therefore, the length in the longitudinal direction of each conduit line 32 is longer than the length (width) in the width direction, and preferably 1 to 10 times the length in the width direction.

  As shown in FIGS. 3B and 3C, the second film 13 b is arranged three-dimensionally along the surface of the base material 12 so that the second grid pattern 21 b corresponds to the irregularities 22. Has been. As a result, the second grid pattern 21b printed on the second film 13b causes the annual ring lines 31 to coincide with the ridge part 26 and the long groove part 27 of the base material 12 in the vertical direction, and each conduit line. 32 are arranged so as to be vertically aligned with the minute irregularities 28 of the substrate 12.

Next, the manufacturing method of the 1st three-dimensional decoration 11a is demonstrated. In addition, the 2nd three-dimensional decoration 11b is manufactured similarly to the 1st three-dimensional decoration 11a.
The manufacturing method of the 1st three-dimensional decoration 11a is a printing process which prints the 1st cell pattern 21a which modeled the surface of the wood planarly on the 1st film 13a, and the film printed by this printing process 13a is inserted into a mold 41 shown in FIGS. 4 (a) to 4 (d) and is molded in-mold. As shown in FIG. 4A, in the printing process, the check pattern 21 a is printed on the surface of the first film 13 a that is laminated on the carrier film 36. The first film 13a is detachably bonded to the carrier film 36.

  In the molding step, a mold 41 for in-mold molding shown in FIGS. 4A to 4D is used. The mold 41 includes a fixed mold 42 and a moving mold 43 that is clamped with respect to the fixed mold 42 in a state where the carrier film 36 is held between the parting line surface (PL surface). A cavity for injecting molten resin is formed between the fixed mold 42 and the movable mold 43. A first film 13a and a carrier film 36 laminated on the film 13a are inserted into the cavity. The fixed mold 42 includes an injection gate 44 for forming the back surface of the substrate 12 and for injecting molten resin.

  The moving mold 43 is provided with an uneven surface 45 for forming the design surface of the three-dimensional decorative article 11a on the cavity surface, and a vacuum for bringing the carrier film 36 inserted into the cavity into close contact with the uneven surface 45 by vacuum suction. A suction device (not shown) is provided. As shown in FIGS. 5A to 5C, the uneven surface 45 of the moving mold 43 is formed in a three-dimensional shape that is complementary to the uneven shape forming the design surface of the three-dimensional decorative article 11a. The uneven surface 45 is manufactured using, for example, a method disclosed in Patent Document 6 or Patent Document 7. That is, in a state where a resist resin that is not corrosive to an etching solution containing an acid or the like is attached to the surface (cavity surface) of the moving mold 43 so as to correspond to the mesh pattern 21a, An uneven surface 45 is formed on the surface of the moving mold 43 by etching the surface of the moving mold 43.

  The etching process can be repeated a plurality of times. Incidentally, FIG. 5A shows an uneven surface 45 subjected to an etching process once, and the maximum depth D1 of the uneven surface 45 is 45 μm. FIG. 5B shows an uneven surface 45 that has been etched twice, and the maximum depth D2 of the uneven surface 45 is 60 μm. FIG. 5C shows an uneven surface 45 that has been etched three times, and the maximum depth D3 of the uneven surface 45 is 100 μm. Incidentally, the dotted lines shown in FIGS. 5A to 5C indicate the depth that can be corroded by one etching process. Positions corresponding to the ridge portions 26 of the base material 12 shown in FIGS. 2B and 2C and FIGS. 3B and 3C are provided on the uneven surfaces 45 shown in FIGS. The mold long groove portion 46 is formed in a long groove shape, the mold ridge portion 47 is formed in a ridge shape at a position corresponding to the long groove portion 27, and the mold unevenness 48 is formed at a position corresponding to the minute unevenness 28. .

  Now, the molding process is performed using an in-mold molding apparatus including the moving mold 43 having the uneven surface 45 manufactured as described above and the fixed mold 42. As shown in FIG. 4A, first, the carrier film 36 is disposed between the fixed mold 42 and the movable mold 43 with the mold 41 being opened. Subsequently, fine alignment is performed with a laser marking light so that the grid pattern 21a of the first film 13a corresponds to the three-dimensional shape of the uneven surface 45 of the moving mold 43, and then the vacuum suction device is used. The carrier film 36 is sucked, and the carrier film 36 and the first film 13a are brought into close contact with each other along the concavo-convex surface 45 as shown in FIG. At this time, as shown in FIG. 5D, each annual ring line 31 of the film 13a is aligned so as to correspond to the mold long groove portion 46 and the mold ridge portion 47. By the way, when manufacturing the second three-dimensional decoration 11b, each annual ring line 31 of the film 13a is aligned so as to correspond to the mold long groove portion 46 and the mold ridge portion 47, and each of the films 13a. The conduit line 32 is aligned so as to correspond to the mold irregularities 48.

  Next, as shown in FIG. 4C, the mold 41 is clamped while holding the carrier film 36 on the PL surface, and then the molten resin is injected into the cavity through the injection gate 44. 12 is molded. Finally, after the cavity is cooled to cure the resin, the mold 41 is opened as shown in FIG. 4D to release the three-dimensional decoration 11a. At this time, since the first film 13a is fixed to the surface of the substrate 12, the first film 13a and the carrier film 36 are easy to release when the three-dimensional decoration 11a is released from the fixed mold 42. Peel off.

Next, the operation of the first and second three-dimensional decorations 11a and 11b will be described.
Now, since the 1st three-dimensional decoration 11a is equipped with the uneven | corrugated shape which has the maximum height Hm of 30-200 micrometers on the design surface, it actually has a three-dimensional structure. As a result, visual and tactile three-dimensional effects are provided. Furthermore, since the printed cell pattern 21a is arranged on the design surface of the three-dimensional decoration 11a so as to correspond to the irregularities 22, the visual three-dimensional effect is further enhanced. Therefore, this three-dimensional decoration 11a makes the texture of natural wood feel visually and tactilely. Furthermore, an annual ring line 31 is arranged along the ridge portion 26 and the long groove portion 27 of the unevenness 22 on the design surface of the first three-dimensional decoration 11a. For this reason, since the annual ring line 31 becomes conspicuously visible by the unevenness 22, the visual three-dimensional effect is further enhanced on the design surface of the three-dimensional decoration 11a.

  On the other hand, the design surface of the second three-dimensional decoration 11b makes the texture of natural wood feel visually and tactilely like the first three-dimensional decoration 11a described above, and extends along the annual ring line 31. Since it is provided with a large number of conduit lines 32, it has a Lauan tone and makes the texture of natural Lauan material feel visually. Further, the surface of the base material 12 of the three-dimensional decoration 11b includes a large number of minute irregularities 28 that three-dimensionally represent a wood conduit portion in addition to a shape that three-dimensionally represents an annual ring of wood. . The micro unevenness | corrugation 28 provides the tactile feeling like the wood which roughened the design surface of the three-dimensional decoration 11b through the film 13b. Further, since the conduit line 32 is arranged so as to correspond to the minute unevenness 28, the conduit line 32 becomes conspicuous on the design surface of the three-dimensional decoration 11b, and the visual three-dimensional effect is further enhanced. It has been. Thus, it feels visually and tactilely closer to natural wood.

  In addition, in the manufacturing method of the 1st three-dimensional decoration 11a mentioned above, it is a laser marking light so that the grid pattern 21a of the 1st film 13a may respond | correspond to the three-dimensional shape of the uneven surface 45 of the moving mold 43. Fine alignment is performed. For this reason, as shown in FIGS. 6A and 6B, each annual ring line 31 of the film 13a is arranged along the ridge part 26 and the long groove part 27 of the base material 12, and each annual ring line 31 is uneven. Makes it stand out. On the other hand, as schematically shown in FIGS. 7A and 7B, even when the fine alignment by the laser marking light is slightly shifted, the film 13a is stretched along the irregularities 22 of the substrate 12. When this occurs, each annual ring line 31 becomes conspicuously visible in the ridge portion 26 and the long groove portion 27 in a form that compensates for the difference in local elongation of the film 13a.

  That is, the film 13a disposed along the ridge portion 26 and the long groove portion 27 both locally exhibits a small elongation rate, and conversely, the film 13a disposed between the ridge portion 26 and the long groove portion 27 A large elongation rate is locally shown in proportion to the inclination angle in the height direction of the unevenness 22 of the material 12. For this reason, as shown in FIG. 7B, when the annual ring line 31 is arranged between the ridge part 26 and the long groove part 27, the annual ring line 31 is thin and unclear according to the elongation rate of the film 13a. It becomes. On the other hand, when the annual ring line 31 is disposed in the vicinity of the ridge part 26 and the long groove part 27, the annual ring line 31 maintains the thickness as it is when printed on the film 13a before the deformation, and is clear. It remains. As a result, the annual ring line 31 disposed along the ridge part 26 and the long groove part 27 is conspicuously visible, and the annual ring line 31 disposed between the ridge part 26 and the long groove part 27 is not so conspicuously visible. .

  Therefore, even in the case schematically shown in FIGS. 7A and 7B, it is possible to sufficiently exhibit the visual three-dimensional effect on the design surface of the three-dimensional decoration 11a. In this embodiment, the range of the displacement width d that can sufficiently exhibit the visual stereoscopic effect is 0.1 to 2.0 mm in this embodiment. Similarly, with respect to the conduit line 32 provided on the design surface of the second three-dimensional decorative article 11b, the film 13a disposed along the minute irregularities 28 is formed around the minute irregularities 28, that is, the ridge portion 26 and the long groove portion. 27, the local elongation rate tends to be smaller than that of the film 13a disposed in the middle of the film. The grid patterns 21a and 21b of the first and second films 13a and 13b are appropriate after predicting the elongation rate of the films 13a and 13b as shown in FIGS. 7A and 7B in advance. It is preferable that it is printed so that a simple design surface can be formed.

  Now, the inventors actually manufactured a plurality of first three-dimensional decorations 11a having different maximum heights Hm of the projections and depressions 22 as shown in Table 1 below using the manufacturing method described above. I tried a sensory evaluation of. The design surface of each three-dimensional decorative article 11a is formed in an uneven shape that is substantially similar in the height direction so as to be proportional to the difference in the maximum height Hm. The sensory evaluation by the five panelists was performed about the tactile sensation in the design surface of each manufactured three-dimensional decoration 11a. The results are shown in Table 1 below.

その結果、最大高さＨｍが３０μｍ以上（表１では、３０〜１４０μｍの範囲内）であれば、十分な触感を与え得ることが判明した。

As a result, it has been found that if the maximum height Hm is 30 μm or more (in the range of 30 to 140 μm in Table 1), sufficient tactile sensation can be provided.

  Next, the present inventors have made the first three-dimensional decoration 11a shown in FIGS. 2 (b) and 2 (c) and the second three-dimensional decoration shown in FIGS. 3 (b) and 3 (c). Each ornament 11b was manufactured. Sensory evaluation was performed about the tactile sensation, the unevenness | corrugation feeling, and the glossiness in the design surface of four types of three-dimensional decoration 11a, 11b manufactured.

  As a result, it has been clarified that the tactile sensation is drastically improved by providing the minute unevenness 28, and the visual three-dimensional effect is dramatically improved by making each minute unevenness 28 and the conduit line 32 correspond to each other. It has been found. Moreover, in these three-dimensional decorations 11a and 11b, since it does not make a glossy feeling stand out strongly, it is possible to make the texture of natural wood feel stronger.

The effects exhibited by the above embodiment will be described below.
(1) In the molding step in the method for manufacturing the first three-dimensional decorative article 11a of the present embodiment, the ridge pattern 21a that is a two-dimensional representation of the surface of the wood and the unevenness that is three-dimensionally the surface of the wood In-mold molding is performed in a state in which the film 13a is inserted into the mold 41 so as to correspond to the uneven surface 45 complementary to the shape. For this reason, since the design surface of the three-dimensional decoration 11a to be manufactured has an uneven shape that three-dimensionally represents the surface of the wood, it has a natural wood texture visually and tactilely. . Furthermore, on the design surface of the three-dimensional decorative article 11a to be manufactured, since the grid pattern 21a of the film 13a is arranged so as to correspond to the uneven shape of the design surface, the visual three-dimensional effect is further enhanced, and natural The texture of wood will be felt strongly. Therefore, according to this method, it is possible to easily manufacture a three-dimensional decorative article 11a having a high design property capable of visually and tactilely feeling the texture of natural wood.

  (2) Since the design surface of the three-dimensional decorative article 11a manufactured by the method for manufacturing the first three-dimensional decorative article 11a of the present embodiment comes to have an uneven shape having a maximum height Hm of 30 μm or more, it is visually In addition, a high three-dimensional feeling is provided tactilely. Furthermore, since the maximum height Hm of the design surface of the three-dimensional decorative article 11a to be manufactured is 200 μm or less, it is easy to form the film 13a in a shape along the uneven surface 45 of the mold 41.

  (3) According to the method for manufacturing the second three-dimensional decorative article 11b of the present embodiment, it is possible to make the texture of natural wood feel visually and tactilely in the same manner as in the above (1) and (2). Possible three-dimensional decoration 11b with high designability can be easily manufactured. Furthermore, since the design surface of the second three-dimensional decorative article 11b manufactured by this manufacturing method is provided with the annual ring line 31 extending along the ridge-shaped and elongated groove-shaped uneven shape, the annual ring line 31 is The concavo-convex shape makes it noticeable. Therefore, the visual three-dimensional effect is further enhanced, and a design surface that strongly feels the texture of natural wood is formed.

  (4) According to the method for manufacturing the second three-dimensional decorative article 11b of the present embodiment, the design surface of the three-dimensional decorative article 11b to be manufactured has the uneven shape that three-dimensionally represents the annual rings of wood, It is provided with a minute uneven shape that three-dimensionally represents a wood conduit. The minute uneven shape gives a tactile sensation like rough wood to the design surface of the three-dimensional decoration 11b, and therefore gives a tactile sensation closer to natural wood. Furthermore, since the design surface of the three-dimensional decoration 11b to be manufactured is provided with the conduit line 32 arranged so as to correspond to the minute uneven shape, it has a Lauan tone, and the texture of the natural Lauan material is visually felt. To be In particular, Lauan wood is familiar to typical wood, and in comparison with metals and resins, it has visually unique characteristics centered on conduits. Suitable for feeling the texture.

(Example of change)
In addition, the said embodiment can also be changed and actualized as follows.
-The cell patterns 21a and 21b may be printed on the back surfaces of the films 13a and 13b. Alternatively, the films 13a and 13b may be formed in a multilayer structure, and the prints 21a and 21b may be printed at positions where they are not exposed on the front and back surfaces of the films 13a and 13b.

  -In the manufacturing method of the 2nd three-dimensional decoration 11b, the metal uneven | corrugated 48 does not need to be formed in the uneven | corrugated surface 45 of the moving mold 43. FIG. In this case, although the micro unevenness | corrugation 28 will no longer be formed in the base material 12 of the 2nd three-dimensional decoration 11b, since the conduit line 32 is printed on the 2nd film 13b, the design surface of this three-dimensional decoration 11b Is decorated in Lauan style.

  -In the manufacturing method of the 1st three-dimensional decoration 11a, the metal uneven | corrugated 48 does not need to be formed in the uneven | corrugated surface 45 of the moving mold 43. FIG. In this case, the minute unevenness 28 is not formed on the base material 12 of the first three-dimensional decoration 11a, but the design surface of the three-dimensional decoration 11a has the annual ring line 31 at a position corresponding to the unevenness 22 of the base material 12. Because it has, it will have a natural wood texture.

  The annual ring line 31 may be disposed only along the ridge portion 26 of the unevenness 22 of the base material 12. Conversely, the annual ring line 31 may be disposed only along the long groove portion 27 of the unevenness 22 of the base material 12.

Further, the technical idea that can be grasped from the above embodiment will be described below.
The method for producing a three-dimensional decorative product according to claim 4, wherein the design surface is formed in a Lauan tone.

  The method for producing a three-dimensional decorative product according to any one of claims 1 to 4, wherein the three-dimensional decorative product is used for an interior part of an automobile.

(A) is a plan view showing the first three-dimensional decoration, (b) is a cross-sectional view taken along line 1b-1b in FIG. 1 (a), and (c) is taken along line 1c-1c in FIG. 1 (a). FIG. (A) is the top view which expanded a part of 1st film, (b) and (c) are all the perspective views which expanded a part of 1st three-dimensional decorations. (A) is the top view which expanded a part of 2nd film, (b) and (c) are all the perspective views which expanded a part of 2nd three-dimensional decoration. (A)-(d) is sectional drawing which shows the formation process in the manufacturing method of a 1st three-dimensional ornamental article later on. (A)-(c) is sectional drawing which expanded all the moving molds which comprise the metal mold | die for in-mold molding, (d) is a 1st film along the uneven | corrugated surface of a moving mold. Sectional drawing which shows a mode when it vacuum-sucks typically. (A) And (b) is a perspective view which shows typically a mode when the annual ring line of a film, the ridge part of a base material, and a long groove part are arrange | positioned up and down. (A) And (b) is a perspective view which shows typically a mode when the annual ring line of a film, the ridge part of a base material, and a long groove part are shifted | deviated slightly up and down.

Explanation of symbols

  11a, 11b ... three-dimensional decoration, 13a, 13b ... film, 21a, 21b ... checkered pattern, 31 ... annual ring line, 32 ... conduit wire, 41 ... mold, 45 ... uneven surface, 46 ... mold long groove part, 47 ... mold ridge part, 48 ... mold unevenness, D1, D2, D3 ... maximum depth.

Claims (4)

A method for producing a three-dimensional decorative article having a design surface having a texture of wood,
The method includes a printing step of printing on a film a checkered pattern imitating the surface of the wood, and a molding step of in-mold molding by inserting the film printed in the printing step into a mold And
In the molding step, the mold having a concavo-convex surface complementary to the concavo-convex shape that three-dimensionally represents the surface of the wood is used, and the grid pattern is made to correspond to the concavo-convex surface, A method for producing a three-dimensional decorative article, wherein a film is inserted into the mold.   The method for producing a three-dimensional decorative product according to claim 1, wherein the uneven surface has a maximum depth of 30 to 200 µm. The grid pattern includes a plurality of annual ring lines that are planarly shaped like the annual rings of the wood,
The concavo-convex surface includes a plurality of mold long groove portions and a mold ridge portion that three-dimensionally modeled annual rings of the wood,
The said film is inserted in the said mold so that each said annual ring line may be arrange | positioned along the said mold long groove part and the said mold ridge part at the said formation process, The Claim 1 or Claim characterized by the above-mentioned. Item 3. A method for producing a three-dimensional decorative article according to Item 2. The grid pattern includes a plurality of conduit lines that are planarly modeled on the conduit portion of the wood, and each conduit line is disposed so as to extend along the annual ring line between the adjacent annual ring lines. ,
The concavo-convex surface comprises a plurality of mold undulations that three-dimensionally model the wood conduit part,
4. The method for producing a three-dimensional decorative article according to claim 3, wherein, in the molding step, the film is inserted into the mold such that each conduit line corresponds to the unevenness of the mold.

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