JPH0654534U - Box-shaped molded product - Google Patents

Abstract

(57) [Summary] (Correction) [Purpose] To provide a box-shaped molded product with low manufacturing cost and with painting up to the edge. [Structure] A developed resin thin plate 1 whose surface is painted by in-mold molding transfer is bent at a hinge portion a to be assembled into a box shape. Since it can be made with one part and painting is applied at the same time as the molding of the thin plate 1, it can be manufactured at a low cost. In addition, it is possible to obtain a product with the edge portion painted.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a box-shaped molded product whose surface is painted.

[0002]

[Prior art]

 2. Description of the Related Art Conventionally, resin-made box-shaped molded products with a painted surface have been widely used for various purposes such as product samples. Usually, such a box-shaped molded product is manufactured by assembling several types of parts into a box-shaped product, and then pasting a printing film on the surface of the product. Painting is also performed by insert molding at the same time as molding, or painting on the surface by roll transfer or direct printing after molding into a box shape.

[0003]

[Problems to be solved by the device]

 However, in insert molding, the film is three-dimensionally placed in the mold and integrally molded, so there is the problem that it is not possible to paint well even on the edge of the molded product, while on the other hand, roll transfer or direct printing after molding. There is a problem in that it takes more than one stroke to paint, and the manufacturing cost becomes high because it takes at least two strokes.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a box-shaped molded product which has a low manufacturing cost and whose edges are painted. Especially.

[0005]

[Means for Solving the Problems]

 In order to achieve the above object, the box-shaped molded product of the present invention is a box-shaped molded product in which a developed resin thin plate whose surface is painted by in-mold molding transfer is bent at the hinge part. It is a feature.

[0006]

[Action]

 By in-mold molding transfer, it is possible to create a developed thin plate with the edge part painted, and by bending this thin plate into a box shape, a box-shaped synthetic resin molded product with the entire surface painted Can be obtained.

[0007]

【Example】

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

FIG. 1 is a perspective view showing a box-shaped molded product as one embodiment of the present invention. This box-shaped product is used as a cigarette sample to be displayed on a cigarette vending machine, and is formed by bending and assembling a thin plate whose front and rear views are shown in FIGS. 2 and 3. 4 is a side view in the left-right direction in FIG. 3, and FIG. 5 is a side view in the up-down direction in FIG.

In the spread thin plate 1, a transfer foil (for example, PET / release layer / release layer / ink / heat sealing agent) is inserted into a mold, and the injection pressure of the resin 2 at the time of molding is applied to the mold. The transfer layer 3 (release layer / ink layer / heat sealing agent) is integrated with the molding resin by performing transfer in the mold simultaneously with the molding by the heat of the resin 2, and the entire surface of the molding resin 2 is covered. It has been painted.

As shown in FIGS. 2 and 3, the thin plate 1 in which the transfer layer 3 is integrally formed on the surface of the molding resin 2 as described above has side panels 5, 6 and a top panel 7 around a rectangular front panel 4. The lower panel 8 and the lower panel 8 are arranged in a continuous manner via a V-shaped hinge portion a on the back side. An enlarged cross-sectional view of the hinge portion a is as shown in FIG. 6. The opening angle is slightly wider than the right angle, and the bottom of the V-shape has a hinge wall thickness of 0.15 to 0.50 mm. The thinner the thickness of the hinge, the easier it is to bend, but if it is too thin, the resin pressure is less likely to be applied at the time of molding and the transferability of the transfer foil deteriorates. Therefore, by adding about 10 to 20% of calcium carbonate or barium sulfate to the heat sealant of the transfer foil, the surface is roughened to improve the adhesiveness of the injection resin and the resin pressure is easily applied. Therefore, it is advisable to use a resin with a poor melt flow of 15 or less. Further, it is preferable to select a material that can withstand bending as the molding resin 2, and to use, for example, a urethane-based or PVC-based ink that does not crack when bent as the ink to be printed on the transfer foil. .

Tapered surfaces b are provided on the upper and lower sides of the side panels 5 and 6 and on both sides of the upper panel 7 and the lower panel 8 at the same inclination as the V-shaped inclination of the hinge portion a. When is bent at the hinge portion a, the adjacent tapered surfaces b face each other to form a corner on the outside. In this embodiment, the front panel 4 and the side panels 4 and 5 are provided with the grooves 9 as shown in FIG. 7 on the front side so as to indicate the boundary between the lids in the cigarette package.

Further, as shown in an enlarged view in FIG. 8, female projections 10 having U-shaped tips are provided adjacent to the tapered surfaces b on the upper and lower sides, on the back surfaces of the side panels 5, 6. On the other hand, on the back surface side of the upper panel 5 and the lower panel 6, as shown in an enlarged view in FIG. 9, male projections whose tips are hooked adjacent to the tapered surfaces b on both sides thereof. 11 is provided. The female projection 10 and the male projection 11 are provided at positions where they are fitted to each other when the thin plate 1 is bent at the hinge portion a.

The thin plate 1 having the above-described structure is bent at its hinge portion a and assembled into a box shape shown in FIG. In this case, the side panels 5 and 6 are first bent at the hinge portions a to be upright with respect to the front panel 4, and then the upper panel 7 and the lower panel 8 are folded at the hinge portions a, respectively, as shown in FIG. As shown in the figure, the protrusion 11a of the male projection 11 is pushed into the groove 10a of the female projection 10 and fitted and fixed. Then, by performing this fitting at four places, the box-shaped molded product shown in FIG. 1 is formed.

[0014]

[Effect of device]

 As described above, the box-shaped molded product of the present invention is a box-shaped assembly made by bending a developed thin resin plate whose surface is painted by in-mold molding transfer at the hinge part. Therefore, it can be made with one part, and since the painting is performed at the same time as the molding of the thin plate, it can be manufactured at a low cost, and it is possible to obtain the one with the painting up to the edge portion.

[Brief description of drawings]

FIG. 1 is a perspective view showing a box-shaped molded article as one embodiment of the present invention.

FIG. 2 is a front view of a thin plate forming the box-shaped molded product shown in FIG.

FIG. 3 is a rear view of the same.

FIG. 4 is a side view in the left-right direction in FIG.

5 is a side view in the vertical direction in FIG.

FIG. 6 is an enlarged cross-sectional view of a hinge portion.

FIG. 7 is an enlarged cross-sectional view of a groove provided in the front panel.

FIG. 8 is an enlarged view of a portion indicated by A in FIG.

9 is an enlarged view of a portion indicated by B in FIG.

FIG. 10 is a view showing a state of a corner portion of the assembled box-shaped molded product.

[Explanation of symbols]

 1 Thin plate 2 Resin 3 Transfer layer a Hinge part

Claims (1)

[Scope of utility model registration request] 1. A box-shaped molded article, characterized in that a developed resin thin plate having a surface painted by in-mold molding transfer is bent at a hinge portion and assembled into a box shape.