JPS6056112B2 - Method for manufacturing peripheral frame for packaging containers - Google Patents

Description

[Detailed Description of the Invention] <Technical Field> The present invention relates to a method for manufacturing a peripheral side frame for a packaging container, and more specifically, a method for manufacturing a peripheral side frame mainly made of a foamed resin sheet, which can be easily and aesthetically stepped. This is the manufacturing method.

<Background and prior art> Conventionally, in the case of packaging containers in which the peripheral frame is constructed by assembling peripheral materials made of foamed resin sheets such as expanded polystyrene sheets into a frame shape, it is difficult to fit a lid or a bottom plate into the packaging container. Stepping was required at one end of the peripheral frame for convenience, but with a single layer of foamed resin sheet material, the stepping had to be done by cutting, which required a thick sheet. Since the skin of the foam sheet is exposed, it has the disadvantage of being unsightly in terms of appearance (
For example, see Utility Model Publication No. 49-44321, etc.).

Another possibility is to laminate a film or the like over the entire foam/resin sheet after the steps are formed so as to cover the steps, but the lamination after the steps are difficult to bond due to the manufacturing process. However, this method could not be adopted because it was difficult to create clear steps. <Purpose> Therefore, the present invention uses a material obtained by bonding a thin body to a foamed resin sheet to create a material with good external appearance and clear tiering on the peripheral side frame, in which the base of the foamed sheet is exposed on the tiering surface. It was designed so that it could be done easily.

Configuration of the present invention to achieve the above object is as follows: (1) V
A process of forming corner bending grooves in the foamed resin sheet, (2) cutting out the material in a direction perpendicular to the corner bending grooves to form a band-shaped circumferential side material, and forming a circumferential side material on the circumferential side material; (3) cutting out a part of the corner bending groove to form a cutout part; (3) cutting out the cutout part in the longitudinal direction of the foamed resin sheet forming the peripheral side material, leaving at least the thin body as a joint part; After forming the circumferential side material by cutting and forming the groove for forming a step that passes through the end, the circumferential side material is bent at the groove for corner bending, and both ends are bent. They are joined together and assembled into a frame shape, and then bent and polymerized at the grooves for forming the stepped portion, and the inner piece is made to have at least one end lower than the outer piece to form a stepped portion, and the joint portion is placed along the stepped portion. The present invention also provides a method for manufacturing a peripheral side frame for a packaging container, in which a peripheral side frame with a stepped portion is manufactured by stamping the same.

Embodiments Next, embodiments of the present invention will be illustrated below with reference to the drawings.

S shown in FIGS. 1 to 3 is a material for forming the peripheral side material A, which is a thin body made of a foamed resin sheet a, paper, composite paper, a synthetic resin film or sheet, etc. Heat-seal b,
The circumferential side material A, which is obtained by joining by adhesion or the like, is first made from the raw material S by passing through the following steps (1) to (3).

(1) A process of forming a V-shaped corner bending groove 10 in a foamed resin sheet a (see FIG. 1).

In this process, the ■-shaped bending groove 10 and bottom groove 11 may be formed by cutting with a cutter (not shown).

(2) The material S is placed in the direction perpendicular to the corner bending groove 10.
A process of cutting out a part of the corner bending groove 10 provided in the circumferential side material A to form a band-shaped circumferential side material A and forming a cutout part 13 (see FIGS. 2 and 3). )
.

In this process, the circumferential side material A can be formed by cutting out the material S using Thomson machining, but at this time, in addition to forming both ends 12, 12'' of the circumferential side material A, the inner and outer pieces are folded between each piece. In consideration of the situation when bending, cut out the cutout part 13 halfway through the corner bending groove 10 (see above) at the same time, so that the bending can be easily done while avoiding interference between the plates. This makes it easier to exit corners.

(3) At least the thin body b is left as the joint part 14, and the groove 15 for forming the step part is cut out in the longitudinal direction of the foamed resin sheet a that forms the peripheral side material A, and passes through the end of the cutout part 13. The process of doing so (Figures 4 to 6).

In this process, the cutter 50 cuts off the step forming groove 15 that passes through the end of the cut portion 13 in the longitudinal direction of the foamed resin sheet a, and the joint portion 14 is filled with at least a thin material b, preferably a small amount. The thick foamed resin sheet a remains together with the thin body b, and the inner piece 1 is inserted through the mouth groove 15 and the joint 14.
6 and an outer piece 17.

Note that the above steps (1) to (3) are preferably carried out in the order of (1) to (3), but it is also possible to combine them in a different order. After forming the circumferential side material A by combining the steps (1) to (3) above, this circumferential side material A is inserted into the corner bending groove 10.
It is assembled into a frame shape by bending it at the side edges 12, 12'' and joining it by heat fusion, adhesive, etc. At this time, the same material as the peripheral side material or aluminum foil is laminated in the bottom groove 11. Insert an appropriate bottom plate B such as a bottom plate B.For details of assembling it into a frame shape, bend the inner piece 16 so that it overlaps with the outer piece 17 at 15 slots for forming the step (7th (See Figures 9 to 9), the overlapping parts are joined by means such as heat fusion, gluing, riveting, stapling, etc., and the stepped portion 18 is formed with the upper end of the inner piece 16 lower than the outer piece 17. The joint part 14 is placed along the stepped part 18 so that the mouth groove 15 is eliminated, and this is pressed with a mold 80 (see especially FIG. 9) to form a peripheral side frame with the stepped part 18. In the case of such a peripheral frame, a container is manufactured in combination with the bottom plate B by fitting the bottom plate B into the bottom groove 11 (see Figs. 10 and 11). ).

Note that the above-mentioned embossing can also be performed using heat. Note that it is also possible to carry out the work without forming the bottom groove 11 for insertion into the bottom plate B, and to assemble the bottom plate B by joining them by adhesive, heat fusion, etc. after assembling the peripheral side frame.

In addition, by using a thin body b with a wood grain pattern W on the exposed surface, a material suitable for the saw layer in terms of appearance can be provided (see Figure 12).Furthermore, the overall container shape is as shown in the figure. It is not limited to the shape, and can also be implemented in a triangular, square, hexagonal, or other shape.

Furthermore, in order to form a stepped portion 18 at the lower end of the inner piece 16, the peripheral side frame is used upside down from the previous implementation, and the bottom plate B is joined to this stepped portion 18 by heat fusion, adhesive, etc. and assembled. , containers may also be provided (see Figures 13 and 14).

Note that in this case, a circumferential frame in which the bottom groove 11 is not formed is used. <Effects> According to the present invention constructed as described above, as described above, it is possible to easily and reliably provide a peripheral frame in which a clear stepped portion 18 with good external appearance is formed at one end.

Moreover, as the peripheral material A for assembling the peripheral frame, a foamed resin sheet a and a thin body b bonded together are used, and when forming the stepped portion 18, at least the thin body b is left as the joint part 14. Since the grooves for forming the stepped portions are cut out in the foamed resin sheet a, it can be applied even to thin sheet materials, and it is easy to follow the stepped portions at one end of the inner piece 16, making it clear once it has been embossed. This results in the formation of a stepped portion that does not easily lose its shape, and the stepped portion has an appearance as if it had been cut and polished, which is of course convenient for fitting the lid or joining the bottom plate. This makes it possible to mass produce products with extremely good appearance.

[Brief explanation of the drawing]

The drawings illustrate an embodiment of the present invention, and Fig. 1 is a front view after adding a part to the material, Fig. 2 is a front view after forming it as a peripheral side material, and Fig. 3 is an enlarged view of the same. A sectional view, FIG. 4 is an enlarged perspective view showing the cutting of the mouth groove when forming the joint, FIG. 5 is a front view showing the circumferential side material after cutting, FIG. 6 is a plan view of the same as above, and FIG. 7 is a perspective view during assembly, FIGS. 8 and 9 are partially enlarged sectional views before and after forming the step, and FIGS. 10 and 1.
1 is a perspective view and a cross-sectional view of container manufacturing using a peripheral frame, FIG.
FIG. 3 is a partially enlarged sectional view of a different usage example in which the peripheral frame is used upside down, and FIG. 14 is an overall sectional view of the same example. S...Material, A...Surrounding material, 10...
... Bending groove, 11 ... Bottom groove, 12, 12
″...Both ends, 13...Resection part, 14
...Joint part, 15...Gout groove, 16...
-Inner piece, 17...Outer piece, B...Bottom plate, W...Wood grain pattern, 50...Cutter, 80...Model.

Claims (1)

[Claims] 1. A process of (1) forming V-shaped corner bending grooves on the foamed resin sheet with respect to a material obtained by bonding a thin body to a foamed resin sheet; (2) the above corner bending grooves; The bending groove is a process of cutting out the material in the right angle direction to form a band-shaped circumferential material, and cutting out a part of the corner bending groove provided in the circumferential material to form a cutout part ( 3) A process of cutting and forming a groove for forming a stepped portion that passes through the edge of the cut portion in the longitudinal direction of the foamed resin sheet forming the peripheral side member while leaving at least the thin body as a joint portion. After forming the circumferential side material, the circumferential side material is bent at the corner bending groove, and both ends are joined to form a frame shape, and the material is bent and overlapped at the step forming groove. , the inner piece is lower than the outer piece at least at one end to form a stepped portion, and a joint portion is placed along the stepped portion and then stamped to produce a circumferential side frame with a stepped portion. A method for manufacturing a peripheral frame for a packaging container. 2. A method of manufacturing a peripheral side frame for a packaging container according to claim 1, using a thin body having a wood grain pattern on its outer surface.