JP2008188831A - Resin molding - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a resin molding in which a display layer with a clear outline can be formed at an exact position. <P>SOLUTION: The resin molding 1 has an insert member 4 in which a hole 4c making the front 4a and the back 4b on the view side communicate with each other is formed, a resin member 5 which is fixed to the insert member 4 on the back 4b to be integrated by insert molding, and the display layer 6 formed in an area wherein it overlaps the hole 4c on the resin member 5 by an in-mold molding transfer during insert molding. The resin member 5 is not formed on the entire periphery of an area wherein it is laid on the hole 4c in front 4a on the view side, and the display layer 6 is formed to be distinguished visually from the insert member 4. In this way, in the resin molding, the display layer with the clear outline can be formed at the exact position. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a resin molded product on which a display layer is formed, and is suitable for use as a dial for a pointer instrument.

  In recent years, various methods have been proposed as a pointer instrument for vehicles, and as one of them, an insert molded resin molded article is applied to a dial for a pointer instrument (see Patent Document 1). ).

This uses a resin molded product having a thin plate-like insert member with a display layer formed by printing and a resin member fixed and integrated with the insert member by insert molding as a dial. . The insert member and the resin member are formed as members having translucency, and are configured so that the display layer is brightly viewed when the dial is irradiated from behind the dial and viewed from the front side of the viewing side. The This aims to provide a backlit dial.
Japanese Patent Publication No. 5-21051

  However, the dial plate according to Patent Document 1 is not sufficient in that the display layer is formed on the insert member by printing, so that the scale and the like by the display layer can be visually observed in a plane, and a novel appearance can be provided. .

  On the other hand, for example, if a convex scale is formed on the dial, the scale can be viewed three-dimensionally, and the appearance of the dial can be improved. The convex scale is formed by forming a convex portion on the dial and forming a display layer having a color tone (at least one of brightness, saturation, and hue) different from that of the dial on the convex portion. Here, since it is difficult to form a display layer on a convex part by screen printing, it is necessary to form a display layer by methods other than screen printing. For example, the display layer can be formed on the convex portion by hot stamping. Hot stamping is a method of thermally transferring a printed layer printed on a film using a hot stamping apparatus.

  However, even with hot stamping, it is difficult to form a display layer with high accuracy on the convex portion. Specifically, it is difficult to form the display layer only on the convex portion side with the boundary between the flat portion and the convex portion of the dial as a boundary. With this boundary as a boundary, the display layer is formed on the flat portion side, or a portion where the display layer is not formed on the convex portion side is generated, and the appearance is deteriorated. That is, it is difficult to form a display layer with a clear outline at an accurate position with respect to the convex portion.

  In addition, although the display layer can be formed on the convex portion by in-mold molding transfer, it is difficult to form a display layer having a clear outline at an accurate position with respect to the convex portion even by in-mold molding transfer. In-mold molding transfer is a method in which a film on which a printed layer is printed is positioned and fed into an injection mold, and the process of molding the molded product and the process of transferring the printed layer to the molded product by transfer are integrated. is there.

  However, it is necessary to form a printing layer at an accurate position with respect to the film so that the display layer can be formed only on the convex portion side with the boundary between the flat portion of the dial and the convex portion as a boundary. It is necessary to position the film on which the layer is formed with high accuracy in the injection mold. For this reason, the process becomes complicated, and it becomes difficult to form a display layer with a clear outline at an accurate position with respect to the convex portion.

  This problem is not limited to the convex scale that forms the display layer on the convex portion, but when the display layer is formed on the convex portion to form a display design including characters or the like, or the display layer is formed on the concave portion to display the design. It is a common problem even when forming the. In addition, this problem is not limited to dials for pointer instruments, but is a problem common to resin molded products. It is not limited to recesses and protrusions. This is a common problem when forming layers.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a resin molded product capable of forming a display layer with a clear outline at an accurate position in the resin molded product.

  In order to achieve the above object, the present invention employs the following technical means.

  The resin molded product according to claim 1 is an insert member in which a hole for communicating the viewing side front surface and the back surface is formed, and a resin member that is fixed and integrated on the insert member and the back surface by insert molding, It is provided with a display layer formed in a region overlapping with the hole on the resin member by in-mold molding transfer at the time of insert molding, and the display layer is inserted without forming the resin member on the entire outer periphery of the region overlapping with the hole on the front side on the viewing side. It is characterized in that it can be visually distinguished from members.

  In this configuration, the display layer is formed in the region overlapping the hole on the resin member by in-mold molding transfer at the time of insert molding, and the resin member is not formed on the entire outer periphery of the region overlapping the hole on the front side of the insert member on the viewing side. Thereby, a display layer can be formed in the area | region which overlaps with a hole on a resin member, without forming a display layer in the whole outer periphery of the area | region which overlaps with a hole in the visual side front surface of an insert member.

  In addition, since the display layer is formed so as to be visually distinguishable from the insert member, it is possible to make a hole with a clear outline of the display layer with the insert member as a background, and in the resin molded product, Can be accurately positioned in the display layer. Therefore, it is possible to provide a resin molded product capable of forming a display layer with a clear outline at an accurate position in the resin molded product.

  In the resin molded product according to claim 2, the display layer is formed on at least one of the viewing side from the viewing side front surface, the same plane as the viewing side front surface, the hole, and the back side from the back side. It is characterized by. Thereby, a display layer can be visually observed in three dimensions, obtaining the above-mentioned effect.

  The resin molded product according to claim 3 is characterized in that the contour shape of the first region is the contour shape of the display design. Thereby, a display layer can be visually observed as a display design, acquiring the above-mentioned effect.

  The resin molded product according to claim 4 is an insert member in which a hole for communicating the viewing side front surface and the back surface is formed, and the insert member and the back surface are fixed and integrated by insert molding, and the viewing side is viewed through the hole. The resin member in which the convex part protruding from the front side to the viewing side is formed, and the display layer formed on the convex part by in-mold molding transfer at the time of insert molding, and the region overlapping the hole on the front side of the visual side is visually The display layer is configured to be disposed in a region overlapping the convex portion on the front side, and the display layer is visually distinguishable from the insert member without forming a resin member on the entire outer periphery of the region overlapping the convex portion on the front side of the viewing side. It is characterized by being formed.

  In this configuration, the region that overlaps the hole on the front side of the viewing side is arranged in the region that overlaps the convex portion on the front side of the viewing side, and the display layer is formed on the convex portion by in-mold molding transfer at the time of insert molding. The resin member is not formed on the entire outer periphery of the region overlapping the convex portion on the front side on the viewing side. Thereby, a display layer can be formed on a convex part, without forming a display layer in the outer periphery of a convex part in the visual side front surface of an insert member.

  In addition to this, since the display layer is formed so as to be visually distinguishable from the insert member, it is possible to make the entire outer periphery of the convex portion a clear outline of the display layer with the insert member as a background, and In the resin molded product, the convex portion can be accurately positioned in the display layer. Accordingly, it is possible to provide a resin molded product capable of forming a display layer with a clear outline at an accurate position in the resin molded product, and to make the display layer visible in three dimensions.

  The resin molded product according to claim 5 is characterized in that the display layer has a repeated pattern. Thereby, a repeating pattern can be formed in the display layer, and the appearance of the display layer can be improved.

  The resin molded product according to claim 6 is characterized in that the shape of the hole is the contour shape of the display design. Thereby, a display layer can be visually observed as a display design, acquiring the above-mentioned effect.

  The resin molded product according to claim 7 is characterized in that the display design is at least one of a character and a scale of a dial for an instrument. Thereby, at least one of the character and scale of the instrument dial which can obtain the above-mentioned effect can be formed, and the resin molded product on which this is formed can be used as the instrument dial.

  Hereinafter, the case where the resin molded product according to the present invention is applied to a dial of a combination meter mounted on an automobile will be described with reference to the drawings.

  A combination meter 10 including a dial 1 which is a resin molded product according to an embodiment of the present invention is disposed in front of a driver's seat of an automobile and constitutes a speedometer that displays a traveling speed as shown in FIG. The speedometer includes a dial 1 and a pointer 11 that rotates the front side of the dial 1 on the viewing side. The dial 1 includes characters (including numbers) 2 that are display designs and scales 3 that are display designs. And are provided.

  As shown in FIG. 2, the dial 1 includes an insert plate 4 that is an insert member in which a hole 4c is formed, and a dial base material 5 that is a resin member that is integrated with the insert plate 4 by insert molding described later. And a display layer 6 formed in a region overlapping the hole 4c on the dial base material 5. The insert plate 4 is formed of, for example, a blue-colored polycarbonate resin having translucency, the hole 4c is formed with the shape of the hole 4c as the contour shape of the scale 3, and the viewing-side front surface 4a and the back surface 4b are holes. 4c communicates.

  The dial base material 5 is made of, for example, a transparent acrylic resin, and the display layer 6 is formed so as to be visually distinguishable from the insert plate 4. For example, it is formed as a display layer 6 having a color tone (at least one of brightness, saturation, and hue) different from that of the insert plate 4, a different texture, or a different gloss. For example, it is formed as a white light-transmitting display layer, and the scale 3 is viewed as a white display layer 6 against a blue insert plate 4.

  In addition, it is also possible to form the insert plate 4 by forming a blue background layer having translucency on a transparent polycarbonate resin, and the insert plate 4 and the display layer 6 are not translucent. It is also possible to form as. Further, the combination of colors is not limited to the combination of blue and white as long as the display layer 6 has a color tone different from that of the insert plate 4.

  Similarly, in FIG. 1, the display layer 6 against the insert plate 4 can be configured to allow the character 2 to be seen.

  Hereinafter, a manufacturing method for realizing a configuration in which the scale 3 is viewed as the white display layer 6 with the blue insert plate 4 as a background will be described.

  As shown in FIG. 3 (a), the thermoplastic film 7 on which the display layer 6 is previously formed by printing or the like is replaced with the insert plate 4 in which the holes 4c are formed as shown in FIG. 3 (b). It is set between the upper molds 12 and the lower mold 13 is set from the lower side in the figure. As shown by an arrow R in the figure, a heated and melted acrylic resin material is injected under pressure from the gate 13a of the lower mold 13.

  Thereby, as shown in FIG.3 (c), the heat-melted acrylic resin material forms the dial base material 5 fixed by the insert plate 4 and the back surface 4b, and integrated by insert molding. In this insert molding, the dial base material 5 is not formed on the entire outer periphery of the hole 4c on the front side 4a on the viewing side. Specifically, in FIG. 3B, the film 7 on which the display layer 6 is formed is set while being pressed by the insert plate 4 and the upper mold 12. This prevents the heated and melted acrylic resin material from entering between the display layer 6 and the insert plate 4 so that the dial base material 5 is not formed on the entire outer periphery of the hole 4c on the viewing side front surface 4a. Alternatively, the shape of the upper mold 12 is devised, for example, a convex portion is provided in a portion facing the entire outer periphery of the hole 4 c in the upper mold 12, and the heat-melted acrylic resin material is inserted into the display layer 6 and the insert. It is also possible not to enter between the plates 4.

  The display layer 6 is formed in an area overlapping the hole 4c in the dial base material 5 by in-mold molding transfer at the time of insert molding. Specifically, in FIGS. 3B and 3C, the heated and melted acrylic resin material reaches the display layer 6 through the holes 4c of the insert plate 4, and the display layer is heated by the heat and pressure of the acrylic resin material. 6 is peeled off from the film 7, and the dial base material 5 is formed below the display layer 6. That is, the display layer 6 is formed by being fixed to the dial base material 5 in a region overlapping the hole 4 c in the dial base material 5 and in the same plane as the viewing side front surface 4 a.

The molded product is taken out from the molds 12 and 13, and the burr 51 generated at the gate 13a is cut in a subsequent process, and the dial 1 is completed after passing through another subsequent process. The display layer 6 and the film 7 that have not been transferred to the dial base material 5 are peeled off from the molded product when the molded product is taken out from the molds 12 and 13.

  In the dial 1 according to the embodiment described above, by insert molding, the dial base material 5 is not formed on the entire outer periphery of the hole 4c on the viewing-side front surface 4a of the insert plate 4, but by in-mold molding transfer at the time of insert molding. The display layer 6 is formed in a region of the dial base material 5 that overlaps the hole 4c. Thus, the display layer 6 can be formed on the dial base material 5 in a region overlapping the hole 4c without forming the display layer 6 on the entire outer periphery of the hole 4c on the viewing side front surface 4a of the insert plate 4.

  In addition, since the display layer 6 is formed so as to be visually distinguishable from the insert plate 4, specifically, the display layer 6 has a white color different from the blue color of the insert plate 4. 4c can be a clear outline of the white display layer 6, and the hole 4c in the dial 1 can be accurately positioned. Accordingly, the display layer 6 having a clear outline can be formed at an accurate position on the dial 1, that is, the scale 3 having a clear outline can be formed at an accurate position on the dial 1. Dial 1 can be provided.

  Similarly, the dial 1 capable of forming the character 2 with a clear outline at an accurate position on the dial 1 can be provided.

(Modification)
In the above example, the display layer 6 is formed in the same plane as the viewing side front surface 4a. However, in the first modification shown in FIG. 4, the display layer 6 is located on the viewing side (upper side in the drawing) from the viewing side front surface 4a. Is formed. Specifically, as shown in FIG. 4A, a recess 12 a is formed in the upper mold 12, and the thermoplastic film 7 on which the display layer 6 is formed is inserted between the insert plate 4 and the upper mold 12. The lower mold 13 is set from the lower side in the figure. A heated and melted acrylic resin material is injected under pressure from the gate 13 a of the lower mold 13.

  Thereby, the thermoplastic film 7 on which the display layer 6 is formed is pressed against the concave portion 12 a of the upper mold 12, and the dial base material 5 is formed below the display layer 6. That is, the display layer 6 is formed on the dial base material 5 in the region overlapping the hole 4c on the viewing side from the viewing side front surface 4a by in-mold molding transfer during insert molding. The molded product is taken out from the molds 12 and 13, and the burr 51 generated at the gate 13a is cut in a subsequent process, and the dial 1 shown in FIG.

  Even in the dial 1 according to the first modification, the display layer 6 can be formed in the dial 1 with the hole 4c as a clear outline of the display layer 6 and the hole 4c in the dial 1 as an accurate position. Similar effects can be obtained. Furthermore, in this modification, since the display layer 6 is formed on the viewing side from the viewing-side front surface 4a, the display layer 6 can be viewed in a convex shape (three-dimensionally). In this way, it is possible to form convex scales, characters, and the like that were not possible with compressed air molding or the like.

  In the second modification shown in FIG. 5, the display layer 6 is formed in the hole 4c. Specifically, as shown in FIG. 5A, the thermoplastic film 7 in which the protrusion 12 b is formed on the upper mold 12 and the display layer 6 is formed is connected to the insert plate 4 and the upper mold 12. The lower mold 13 is set from the lower side in the figure. A heated and melted acrylic resin material is injected under pressure from the gate 13 a of the lower mold 13.

  Thereby, the thermoplastic film 7 on which the display layer 6 is formed is pressed against the protruding portion 12 b of the upper mold 12, and the dial base material 5 is formed below the display layer 6. That is, the display layer 6 is formed in the hole 4c on the dial base material 5 by in-mold molding transfer during insert molding. The molded product is taken out from the molds 12 and 13, and the burr 51 generated in the pouring gate 13a is cut in a subsequent process, and the dial 1 shown in FIG.

  Even in the dial 1 according to the second modification, the display layer 6 can be formed in the dial 1 with the hole 4c as a clear outline of the display layer 6 and the hole 4c in the dial 1 as an accurate position. Similar effects can be obtained. Furthermore, in this modification, since the display layer 6 is formed in the hole 4c, the display layer 6 can be visually observed in a concave shape (three-dimensionally).

  In the third modification shown in FIG. 6, the display layer 6 is formed behind the back surface 4b (the lower side in the drawing). Specifically, as shown in FIG. 6A, a protrusion 12c having a protrusion degree larger than that of the protrusion 12b is formed on the upper mold 12, and a thermoplastic film 7 on which the display layer 6 is formed is inserted into the insert. The plate 4 is set between the upper mold 12 and the lower mold 13 is set from the lower side in the figure. A heated and melted acrylic resin material is injected under pressure from the gate 13 a of the lower mold 13.

  Thereby, the thermoplastic film 7 on which the display layer 6 is formed is pressed against the protruding portion 12 b of the upper mold 12, and the dial base material 5 is formed below the display layer 6. That is, the display layer 6 is formed on the dial base material 5 in the region overlapping the hole 4c and behind the back surface 4b (lower side in the drawing) by in-mold molding transfer during insert molding. The molded product is taken out from the molds 12 and 13, and the burr 51 generated at the gate 13a is cut in a subsequent process, and after passing through another subsequent process, the dial 1 shown in FIG. 6B is completed.

  Even in the dial 1 according to the third modified example, the display layer 6 can be formed in the dial 1 with the hole 4c as a clear outline of the display layer 6 and the hole 4c in the dial 1 as an accurate position. Similar effects can be obtained. Furthermore, in the present modification, the display layer 6 is formed behind the back surface 4b, so that the display layer 6 can be viewed more concavely (three-dimensionally) than the second modification shown in FIG. it can. In this way, concave scales, characters, and the like that could not be formed by compressed air molding or the like can be formed.

  In the fourth modification shown in FIG. 7, the display layer 6 is formed in a region larger than the hole 4c on the viewing side (upper side in the drawing) from the viewing side front surface 4a. Specifically, as shown in FIG. 7A, a recess 12d having a larger area than the hole 4c is formed in the upper mold 12, and the thermoplastic film 7 on which the display layer 6 is formed is connected to the insert plate 4. It is set between the upper molds 12 and the lower mold 13 is set from the lower side in the figure. A heated and melted acrylic resin material is injected under pressure from the gate 13 a of the lower mold 13.

  Thereby, the thermoplastic film 7 on which the display layer 6 is formed is pressed against the recess 12 d of the upper mold 12, and the dial base material 5 is formed below the display layer 6. That is, the display layer 6 is formed in the second region B on the dial base material 5 on the viewing side from the viewing side front surface 4a by in-mold molding transfer during insert molding. The molded product is taken out from the molds 12 and 13, and the burr 51 generated at the gate 13a is cut in a subsequent process, and the dial 1 shown in FIG.

  The dial 1 according to the fourth modification is configured such that a region overlapping the hole 4c on the viewing side front surface 4a is arranged in a region overlapping the convex portion 52 on the viewing side front surface 4a, and insert molding is performed on the convex portion 52. The display layer 6 is sometimes formed by in-mold transfer, and the dial base material 5 is not formed on the entire outer periphery of the region overlapping the convex portion 52 on the viewing-side front surface 4a.

  Thereby, the display layer 6 can be formed on the convex portion 52 without forming the display layer 6 on the entire outer periphery of the convex portion 52 on the viewing-side front surface 4 a of the insert plate 4. That is, the display layer 6 with a clear outline can be formed at an accurate position with respect to the convex portion 52. That is, since the display layer 6 can be formed on the dial 1 with the convex portion 52 as a clear outline of the display layer 6 and the convex portion 52 as an accurate position on the dial 1, the same effect as described above can be obtained. Can do. Furthermore, in this modification, since the display layer 6 is formed on the viewing side from the viewing-side front surface 4a, the display layer 6 can be viewed in a convex shape (three-dimensionally).

  In the fifth modified example shown in FIG. 8, the display layer 6 has a repeated pattern 6a. Thereby, the repeating pattern 6a can be formed in the display layer 6 while obtaining the same effect as described above, and the appearance of the display layer 6 can be improved.

  Note that the display layer 6 is not limited to the display design such as the scale 3 and the character 2 described above, and the display layer 6 may be configured to be visually observed as another display design.

  Further, the present invention is not limited to the above-described examples, and combinations thereof and other various modifications are conceivable.

  As described above, the dial 1 which is a resin molded product according to the present invention includes the insert plate 4 which is an insert member in which the hole 4c for communicating the viewing-side front surface 4a and the back surface 4b is formed, and the insert plate 4 by insert molding. A dial base material 5 which is a resin member fixed and integrated on the back surface 4b, and a display layer 6 formed in a region overlapping the hole 4c on the dial base material 5 by in-mold molding transfer at the time of insert molding The display layer 6 is formed so as to be visually distinguishable from the insert plate 4 without forming the dial base material 5 on the entire outer periphery of the region overlapping the hole 4c on the viewing side front surface 4a. Thereby, the resin molded product which can form the display layer with a clear outline in the exact position in a resin molded product can be provided.

FIG. 1 is a partial front view of a combination meter 10 including a dial 1 which is a resin molded product according to an embodiment of the present invention. FIG. 2 is an enlarged sectional view taken along line II-II in FIG. FIG. 3 is an explanatory view showing a manufacturing process of the dial 1 shown in FIG. FIG. 4 is an explanatory view showing a first modification of the dial 1 shown in FIG. FIG. 5 is an explanatory view showing a second modification of the dial 1 shown in FIG. FIG. 6 is an explanatory view showing a third modification of the dial 1 shown in FIG. FIG. 7 is an explanatory view showing a fourth modification of the dial 1 shown in FIG. FIG. 8 is a partial front view of a combination meter 10 including a modification of the dial 1 shown in FIG.

Explanation of symbols

1 Dial (resin molded product, instrument dial), 2 characters (display design), 3 scale (display design)
4 Insert plate (insert member), 4a Viewing side front surface, 4b Back surface, 4c hole 5 Dial base material (resin member), 51 Burr, 52 Convex part 6 Display layer, 6a Repeat pattern, 7 Film, 10 Combination meter 11 Pointer , 12 Upper mold, 12a, 12d Recess, 12b, 12c Projection 13 Lower mold, 13a Gate

Claims (7)

An insert member in which a hole for communicating the front side and the back side on the viewing side is formed;
By insert molding, a resin member fixed and integrated on the back surface with the insert member;
A display layer formed in a region overlapping the hole on the resin member by in-mold molding transfer at the time of the insert molding,
Do not form the resin member on the entire outer periphery of the region overlapping the hole on the front side of the viewing side,
The resin molded product, wherein the display layer is formed so as to be visually distinguishable from the insert member.   The display layer is formed on at least one of the viewing side from the viewing side front surface, the same plane as the viewing side front surface, the hole, and the back side from the back surface. 1. The resin molded product according to 1.   The resin molded product according to claim 1 or 2, wherein the shape of the hole is a contour shape of a display design. An insert member in which a hole for communicating the front side and the back side on the viewing side is formed;
By insert molding, a resin member that is fixed and integrated with the insert member and the back surface, and a convex portion that protrudes from the viewing side front surface to the viewing side through the hole, and
A display layer formed on the convex portion by in-mold molding transfer at the time of the insert molding,
The region that overlaps the hole on the front side of the viewing side is configured to be disposed in the region that overlaps the convex portion on the front side of the viewing side,
Do not form the resin member on the entire outer periphery of the region overlapping the convex portion on the front side of the viewing side,
The resin molded product, wherein the display layer is formed so as to be visually distinguishable from the insert member.   The resin molded product according to claim 1, wherein the display layer has a repeated pattern.   The resin molded product according to claim 4, wherein the shape of the hole is a contour shape of a display design.   The resin display product according to claim 3 or 6, wherein the display design is at least one of a character and a scale on an instrument dial.

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