JPH0592499A - Method for bending four edges of plastic package, device therefor, and four edge-bent package - Google Patents

Abstract

(57) [Summary] [Purpose] The edges of a plastic package are bent simultaneously in four directions. [Structure] Three-sided bent ears (2A, 3A,
4A) is formed by the main template, and the bent ears 5A on the fourth side are formed.
Is characterized in that it is formed by a sub-mold plate, and this four-way bending is performed substantially simultaneously and processed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and apparatus for bending an edge portion as a secondary processing in a plastic packaging body used as a so-called package product, specifically a cover body. And an edge-folded package.

[0002]

2. Description of the Related Art The conventional edge bending method of this type is only three-way bending.

[0003]

DISCLOSURE OF THE INVENTION The present invention is intended to fold the edges of a plastic package, which has been conventionally only able to be folded in three directions, into four directions at substantially the same time. The reason that the prior art only performed three-way folding was that the four-way folding could not remove the package from the template.

[0004]

The present invention employs a main template and a sub template, and uses three sides of the main template to heat, bend, and cool the three sides of the package. A portion corresponding to the fourth side of the package in the main template while the edge is bent and the edge of the fourth side of the package is bent by heating, bending, and cooling means using the sub template. The relief piece is formed by cutting and raising the relief piece at a constant angle, and the packaging body bent in four directions is pulled out.

[0005]

The plastic packaging body as a semi-finished product is placed on the placing frame base with the opening facing upward, and the main template is lowered from above and the three sides of the packaging body are mounted by known means. Heat, bend. Next, the sub mold plate is used to heat the fourth side and bend it by the slide pressing means to form a bent ear. Next, the sub template is retracted, and then the main template is raised together with the four-folded package, and when the package is pulled out in a predetermined direction, the bent ears are formed on the main template with a certain degree. Since it passes under the relief piece at the angle of θ, the four-fold folded package can be smoothly extracted.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings. Reference numeral 1 is a transparent synthetic resin package that constitutes a part of the package, and four bent ears (2A, 3A, 4A, 5A) are formed on the edges (2, 3, 4, 5). It is bent in all directions. The main point of the present invention is that the edge portion 5 has a bent ear portion 5
There is a so-called four-way bending in which A is formed, and the bending ear portions (2A, 3A, 4A) are formed by a known three-way bending means. 6 is a semi-finished product package, and edges (2, 3,
4, 5) on the outside of the folding margin (2a, 3a, 4a,
5a) are connected in series. This folding margin (2a, 3
a, 4a, 5a) are bent inward to form bent ears (2A, 3A, 4A, 5A). 7 is a hook hole. 8 is an opening.

Next, each mechanism for making the product of the present invention and its operation will be described. 9 is a main template made of stainless steel, and has forming edges (10, 11, 12) for forming the bent ears (2A, 3A, 4A) of the package 1 on three sides. Reference numeral 13 is a relief piece portion having a constant angle θ = 30 to 45 degrees, which is formed by cutting and raising a notch portion 14 in the fourth direction part, and the packaging body 1 bent in four directions in the arrow A direction as described later. The bent ear portion 5A is effective for passing smoothly under the escape piece portion 13 without being caught by the bent ear portion 5A when it is pulled out.

The main template 9 is a timing operation command circuit 15
It is designed to move up and down in timing with other mechanisms. In order to mold and process the package 1, first, the semi-finished product package 6 having the folding margins (2a, 3a, 4a, 5a) is placed on a mounting frame base 16 on which an opening 8 faces upward. Place it. After that, the main template 9 is lowered and brought into contact with the opening 8, and the folding margins (2a, 3a, 4a) are heated, folded and cooled by a known three-way folding means to bend. The ears (2A, 3A, 4A) are formed. Therefore, the semi-finished product package 6 is substantially in the same state as being suspended from the main template 9.

Next, a description will be given of the forming process of the bent ear portion 5A which becomes the fourth bent portion. Reference numeral 17 denotes a sub template which is moved in the direction of the arrow through an air-cylinder 18 in response to a command signal from the timing operation command circuit 15 described above, and the semi-finished product package 6 held by the main template 9 described above. Is positioned on the bending margin portion 5a. Reference numeral 19 denotes a heating plate, which is positioned at a predetermined position below the bending allowance portion 5a of the semi-finished product package 6, and is heated up and down by a command signal from the timing operation command circuit 15 while heating the bending allowance portion 5a. The drive mechanism 20 moves upward in the direction of the arrow C to bend the bending margin portion 5a by 90 degrees so that it stands upright. Although a pinion rack mechanism (not shown) is adopted as the vertical drive mechanism 20 via a motor and a gear system, an air cylinder may be adopted.

Reference numeral 21 is a bending plate which moves in the horizontal direction, and is designed to move in the direction of arrow D through the air-cylinder 23 in response to a command signal from the timing operation command circuit 15 in the vertical direction. Bend by 90 degrees The bent margin portion 5a is bent further inward by 90 degrees, and the bent ear portion 5A is bent.
Is formed. At this time, the heating plate 19 moves down in the arrow E direction. At the same time when the bent ear portion 5A is formed, cool air is blown from the air nozzle 22 to cool the bent ear portion 5A. At that time, the sub template 17 returns to the arrow F direction. Next, the folding plate 21 also returns in the arrow G direction. In this way, the four-way bending is completed and the package 1 is completed.

The package 1 is in a state of being supported by the forming edge portions (10, 11, 12) of the main template 9 described above,
After this four-way bending is completed, the package 1 is raised by the command signal from the timing operation command circuit 15 in the direction of the arrow H via the air-cylinder 24.
And rise to the same body. After that, the main template 9 as a whole is moved in the direction of the arrow I by a horizontal moving mechanism (not shown). Then, when the package 1 is pulled out in the direction of the arrow A by hand, the bent ears 5A of the fourth direction pass below the escape piece 13 formed on the main template 9 at a constant angle θ. The package 1 can be smoothly removed from the main template 9. In this embodiment, the case where one package 1 is made has been described, but two packages can be made at the same time by arranging the above-mentioned mechanism on both the left and right sides.

[0012]

As described above, according to the present invention, the packaging body as a package product can be bent in four directions.

[Brief description of drawings]

FIG. 1 is a perspective view of a product of the present invention.

FIG. 2 is a vertical sectional front view of the same.

FIG. 3 is a plan view of a semi-finished product package.

FIG. 4 is a plan view of the product of the present invention.

FIG. 5 is an enlarged front view of the essential part showing the first step of the method for processing the product of the present invention.

FIG. 6 is a diagram which similarly shows the second step.

FIG. 7 is likewise a diagram showing a third step.

FIG. 8 is an enlarged plan view of an essential part showing a first step of the method for processing the product of the present invention.

FIG. 9 is a diagram of the same as the second step.

FIG. 10 is a diagram which similarly shows a third step.

FIG. 11 is a schematic diagram for explaining that each processing member operates in timing with a command signal from a timing operation command circuit.

FIG. 12 is a perspective view of a main template.

FIG. 13 is a plan view of a main template.

FIG. 14 is a sectional view taken along line YY of the main template.

[Explanation of symbols]

 1 Package 2, 3, 4, 5 Edges 2A, 3A, 4A, 5A Bending ears 2a, 3a, 4a, 5a Bending margins 6 Semi-finished product packaging 9 Main template 13 Escape piece 15 Timing operation Command circuit 17 Sub template

Claims (3)

[Claims] 1. (a) The semi-finished product package 6 is placed on the placing frame base with the opening facing upward, and the main mold plate in which the escape piece portion 13 is formed is lowered from above and A first step in which the three-sided folding ears (2A, 3A, 4A) are formed by bringing them into contact with the semi-finished product package, and (b) a fold margin part connected to the edge 5 of the semi-finished product package. 5a is bent inward by 180 degrees to form a bent ear portion 5A. In response to a command signal from a timing operation command circuit, a sub template, a heating plate, a bent plate, and an air plate.
The second step of sequentially operating the nozzles, and (c) the packaging body having the bent ears (2A, 3A, 4A, 5A) that are bent in four directions are made horizontal by using the relief portions of the main template. Bending method for four-sided edges in a plastic package consisting of a third step of extracting 2. The main mold plate 9 and the sub mold plate 17 are provided on the four sides of the semi-finished product package 6 to allow bending (2a, 3a, 4a, 5).
a) Bend inward and bend the ears (2A, 3A, 4A,
5A) and a relief piece 13 of a predetermined angle θ is formed on the main mold plate 9 and the bent side ears 5A of the fourth side formed by the sub mold plate 17 are the same as when the package 1 is pulled out. Four-way folding device for plastic packaging formed so as to pass under the escape piece 13 3. A three-fold bent ear portion (2A, 3) of the package 1.
A, 4A) is formed by the main mold plate 9 and the bending ears 5A of the fourth side are formed by the sub mold plate 17, and the four sides in the plastic packaging body processed by performing the four-way bending at substantially the same time. Edge-folded package