JP2014231158A - Injection molded article, injection molding method and injection mold - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an injection molded article having an embossment image part by an easy and simple method without employing a pressure transfer process.SOLUTION: An injection mold 30 having an embossment image molding part 35 inside is prepared. An injection resin 20a is injected inside the injection mold 30. Thereby the embossment image molding part 35 helps produce an injection molded article 20 with an embossment image part 10 molded thereon. The embossment image part 10 shows images 10A, 10B, 10C different from each other when seen from different directions.

Description

  The present invention relates to an injection-molded article having an embossed image portion formed on a surface with irregularities, an injection molding method, and an injection mold.

  Conventionally, an embossed image product and an embossed molded product in which an uneven image is formed on the surface are known. In addition, a molding method is known in which an embossed product having a concavo-convex image is formed by pressing and transferring to an object to be molded using an embossed plate. Furthermore, as an embossing plate used for pressure transfer, a plate-shaped plate and a roll-shaped plate are known.

  In addition, with regard to such an embossed image object having a concavo-convex shape, an image that shows different images from different directions has been developed.

JP 2004-314429 A

  As described above, an embossed image product and an embossed molded product in which an uneven image is formed on the surface are conventionally known.

  However, a conventional embossed image product or an embossed molded product is formed by first preparing a material to be a molded product and pressing and transferring the material onto the molded product using an embossed plate. Thus, when manufacturing the conventional embossed image thing and an embossing molded product, a press transcription | transfer process is needed and a manufacturing process becomes complicated.

  The present invention has been made in consideration of such points, and an injection-molded product, an injection-molding method, and an injection-molded metal having an embossed image portion that can be easily and easily manufactured without going through a pressure transfer process. The purpose is to provide a mold.

  The present invention is an injection-molded product having an embossed image portion on the surface, wherein the embossed image portion shows different images as seen from different directions.

  The present invention is an injection molded product wherein the injection resin is made of polystyrene, a cyclic olefin copolymer, or acrylic.

  The present invention relates to an injection mold for manufacturing an injection-molded article for producing an injection-molded product having an embossed image part on the surface and made of an injection resin, and the embossed image part appears different from each other. An injection mold having an embossed image forming portion for forming an embossed image portion on the inner surface of the mold.

  The present invention is the injection mold, wherein the embossed image forming portion is provided on the inner surface of the injection mold by laser processing.

  The present invention is an injection mold characterized in that the injection mold is made of SUS or an iron alloy.

  The present invention relates to an injection molding method for manufacturing an injection molded product having an embossed image portion on the surface and made of an injection resin, wherein the embossed image portion shows different images from different directions. A process for preparing an injection mold having an embossed image forming part formed on the inner surface for molding, and an injection resin having an embossed image part on its surface is manufactured by injecting an injection resin into the injection mold. An injection molding method characterized by comprising the steps of:

  The present invention is the injection molding method, wherein the injection resin is made of polystyrene, a cyclic olefin copolymer, or acrylic.

  According to the present invention, the embossed image forming part for forming the embossed image part has the embossed image part on the surface only by injecting the injection resin into the injection mold provided on the inner surface. It is possible to obtain an injection-molded product in which images appear different from each other when viewed from different directions.

FIG. 1 is a perspective view showing an injection molded product according to the present invention. FIG. 2 is a perspective view showing an injection mold according to the present invention. FIG. 3A is a view showing a first image showing an embossed image portion of an injection molded product according to the present invention, and FIG. 3B is an enlarged view showing the first image. FIG. 4A is a view showing a second image showing an embossed image portion of an injection molded product according to the present invention, and FIG. 4B is an enlarged view showing the second image. FIG. 5A is a diagram showing a base on which an embossed image portion of an injection molded product according to the present invention appears, and FIG. 5B is an enlarged view showing the base. FIG. 6 is a view showing a composite image of the first image, the second image, and the ground, in which the embossed image portion of the injection molded product according to the present invention appears.

BEST MODE FOR CARRYING OUT THE INVENTION

  Next, embodiments of the present invention will be described with reference to the drawings.

  1 to 6 show an embodiment of the present invention.

  First, an injection molded product according to the present invention will be described with reference to FIG. As shown in FIG. 1, a content container 20 </ b> A is composed of a container body 22 having a glass or plastic opening for storing contents and a plastic lid body 20 covering the opening of the container body 22.

  Of these, the plastic lid 20 is composed of an injection-molded article 20 according to the present invention having an embossed image portion 10 having a concavo-convex shape on its surface. In this case, the injection molded product 20 can be produced by injecting an injection resin 20a into the injection mold 30 as will be described later. When producing the injection molded product 20, the surface of the injection molded product 20 is simultaneously produced. The embossed image portion 10 is formed.

  The embossed image portion 10 is configured to show different images 10A, 10B, and 10C when viewed from different directions (see FIGS. 5A, 5B, and 5C).

  Moreover, as injection resin 20a for shape | molding the injection molded product 20, injection resins, such as a polystyrene, an acryl, a cyclic olefin copolymer etc., can be used, for example.

  In FIG. 1, in addition to the embossed image portion 10, another mark 21 is provided on the surface of the injection molded product 20 constituting the lid body by transfer or sticking.

  1 and 2, an external screw may be provided on the upper outer surface of the container main body 22, and an internal screw that engages with the external screw of the container main body 22 may be provided on the inner surface of the injection molded product 20.

  Next, a manufacturing method for manufacturing the injection molded product 10 constituting the lid will be described with reference to FIG.

  First, an injection mold 30 for producing an injection molded product 20 having the embossed image portion 10 on the surface is prepared.

  The injection mold 30 includes a male mold 32 and a female mold 31 and injects an injection resin 20a from a spout 33 provided on the female mold 31 side in a space between the male mold 32 and the female mold 31. Thus, the injection molded product 20 can be obtained.

  In this case, the injection mold 30 is made of SUS or iron alloy as a whole, and an embossed image forming part 35 for forming the embossed image part 10 is provided on the inner surface of the female mold 31. Since the embossed image forming part 35 is for forming the embossed image part 10 having a structure to be described later, the embossed image forming part 35 has a structure opposite to the embossed image part 10 corresponding to the embossed image part 10.

  Further, since the embossed image forming portion 35 has a fine shape, it can be formed by a laser drawing method in which the inner surface of the female die 31 is irradiated with a carbon dioxide laser or a YAG laser.

  Next, the injection resin 20a is injected from the spout 33 of the female mold 31 into the injection mold 30 having the structure as described above. Thus, an injection molded product 20 having the embossed image portion 10 formed on the surface by the embossed image forming portion 35 is obtained.

  Next, the injection molded product 20 is taken out from the injection mold 30. Thereafter, in addition to the embossed image portion 10, another mark 21 is formed on the surface of the injection molded product 20 by transfer or sticking.

  As described above, according to the present embodiment, the injection molded product 20 having the embossed image portion 10 on the surface can be obtained simply by injecting the injection resin 20 a into the injection mold 30. In this case, the injection molded product 20 having the embossed image portion 10 can be manufactured without going through the pressure transfer step, and the injection molded product 20 can be obtained easily and simply.

  By the way, the embossed image portion 10 having a concavo-convex shape formed on the surface of the injection-molded product 20 appears different images 10A, 10B, and 10C as seen from different directions.

  Hereinafter, the embossed image portion 10 will be described with reference to FIGS. 3 (a), 3 (b) to 6 (a), (b).

  The embossed image portion 10 having an uneven shape formed on the surface of the injection molded product 20 has a first image 10A and a second image 10B that look different depending on a predetermined viewing angle, and the first image 10A and the second image 10B. The other area is the base 10C.

  In this case, FIG. 3A shows the first image 10A in which the embossed image portion 10 appears, and FIG. 3B is an enlarged view showing each portion of the first image 10A.

  4A shows the second image 10B in which the embossed image portion 10 appears, and FIG. 4B is an enlarged view showing each part of the second image 10B.

  Further, FIG. 5A shows a base 10C showing an area other than the first image 10A and the second image 10B, and FIG. 5B is an enlarged view showing each part of the base 10C.

  That is, the first image 10A is shown in FIG. 3A, and the first image 10A includes a concavo-convex shape including the inclined stripes 10a shown in FIG.

  As shown in FIG. 3B, the inclined stripe 10a constituting the first image 10A extends from the upper left to the lower right, and in this case, the first stripe 10a is viewed from the direction orthogonal to the inclined stripe 10a. Image 10A appears.

  Moreover, the 2nd image 10B is shown by Fig.4 (a), and the 2nd image 10B contains the uneven | corrugated shape which consists of the inclined stripe 10b shown in FIG.4 (b).

  As shown in FIG. 4B, the inclined stripes 10b constituting the second image 10B extend from the upper right toward the lower left. In this case, the second image 10B is viewed from the direction orthogonal to the inclined stripes 10b. Appears.

  Further, FIG. 5 (a) shows a base 10C, and the base 10C includes a concavo-convex shape made up of lattice stripes 10C shown in FIG. 5 (b).

  As shown in FIG. 5B, the base 10C can be seen from any direction with respect to the lattice stripe 10C constituting the base 10C.

  Also, the first image 10A shown in FIGS. 3A and 3B, the second image 10B shown in FIGS. 4A and 4B, and the base 10C shown in FIGS. 5A and 5B are synthesized. Thus, a composite image 10D shown in FIG. 6 is generated, and the embossed image portion 10 of the injection-molded product 20 includes the composite image 10D.

  When the embossed image portion 10 of the injection molded product 20 is viewed from the front, a composite image 10D including the first image 10A, the second image 10B, and the base 10C appears from the embossed image portion 10 (see FIG. 6).

  On the other hand, when the embossed image portion 10 is viewed from the upper right to the lower left (in a direction orthogonal to the inclined stripe 10a of the first image 10A), the first image 10A that appears on the base 10C is seen from the embossed image portion 10. be able to. In this case, since the viewing direction is parallel to the inclined stripes 10b of the second image 10B, the second image 10B cannot be seen.

  Further, when the embossed image portion 10 is viewed from the upper left to the lower right (in a direction orthogonal to the inclined stripe 10b of the second image 10B), the second image 10B appearing on the base 10C from the embossed image portion 10 is displayed. Can see. In this case, since the direction is parallel to the inclined stripe 10a of the first image 10A, the inclined stripe 10A of the first image 10A cannot be seen.

  The first image 10A and the second image 10B are not particularly limited, and for example, arbitrary images such as letters, numbers, patterns, diagrams, figures, photographs, trademarks, symbols, and the like are formed.

DESCRIPTION OF SYMBOLS 10 Embossed image part 10A 1st image 10B 2nd image 10C Base 20 Injection molded product (lid body)
20A Contents container 20a Injection resin 22 Container body 30 Injection mold 31 Female mold 32 Male mold 33 Outlet 35 Embossed image molding part

Claims (7)

In the injection molded product made of injection resin, having an embossed image part on the surface,
An embossed image part is an injection-molded product characterized in that different images appear from different directions.   2. The injection-molded article according to claim 1, wherein the injection resin is made of polystyrene, a cyclic olefin copolymer, or acrylic. In an injection mold for manufacturing an injection molded product having an embossed image part on the surface and made of an injection resin, and the embossed image part appears different from each other in different directions,
An injection mold, wherein an embossed image molding part for molding an embossed image part is provided on the inner surface of the injection mold.   4. The injection mold according to claim 3, wherein the embossed image forming portion is provided on the inner surface of the injection mold by laser processing.   The injection mold according to claim 3 or 4, wherein the injection mold is made of SUS or an iron alloy. In the injection molding method for producing an injection molded product having an embossed image part on the surface and made of injection resin, and the embossed image part appears different from each other in different directions,
A step of preparing an injection mold in which an embossed image forming part for forming an embossed image part is formed on the inner surface;
And a step of producing an injection molded product having an embossed image portion on the surface by injecting an injection resin into the injection mold.   7. The injection molding method according to claim 6, wherein the injection resin is made of polystyrene, a cyclic olefin copolymer, or acrylic.

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