JPS5931928B2 - How to make plastic containers and balloons - Google Patents

Description

[Detailed Description of the Invention] Background and Purpose Once upon a time, there was a square paper balloon like the one shown in Figure 1.

Medicine peddlers and others brought them. When I breathed in through my mouth 42, it expanded into a rectangular parallelepiped, as shown in Figure 2.

The present invention relates to a method for making the above-mentioned square balloon-shaped plastic container.

By making good use of the plastic %14E, it can be made automatically and continuously in a few steps.

This container can be used as a balloon itself or as a drink bag.

Embodiment (1) 10 in Figure 3A is a tubular plastic film made, for example, by inflation molding, and is made of PE, PP, PVO, or the like.

While continuously feeding it out, the opposing sides 12, 14
(Fig. 3B), bring them close together until they are nearly touching, and flatten them (Fig. 3C).

Then, the internal space 16 becomes horizontally H-shaped.

Further, the portion excluding the gap 15 between the both sides 12 and 14 is quadruple.

(2) Run the object thus constructed toward the right as shown in ``Figure 4.''

Then, at appropriate intervals, as shown at 18 and 19, the quadruple films are heat-sealed together along an X shape, where the tops of the two V shapes are butted together (No. 5
figure).

Ultrasonic welding may also be used. (3) Simultaneously with the above welding, 20
, 22 (FIG. 4).

Then, create a hexagon 2B like the 6th group.

The entire cutting line 20 lies above the weld 18 (cuts over the weld).

The other cutting line 22 is also entirely on the welded part 19, but only the top part 221 is removed from the welded part 19 and placed inside it (cut the inside).

Then, the part where it came off becomes the mouth 30 as shown in "Figure 6".

``FIG. 7'' and ``FIG. 8'' show cross sections of the hexagonal body 28 in FIG.

Note that the triangular part shown at 24.26 in Figure 4 is not used.

(4) Next, hold the unwelded part 32 (Fig. 6) and apply a little force to open it in the directions of 34 and 36 (7th,
Figure 9).

Then, the welded parts 18 and 19 are torn off between the second sheet and the third sheet opening, resulting in a state as shown in Figure 10.

It is the same as the paper balloon shown in Figure 1, although the position of the opening 30 is different.

When you blow in through the inlet 30 (it's easier to do so using a straw), it swells up and becomes a rectangular parallelepiped, as shown in Figure 11.

Effects of the Invention By using a tube-shaped product as shown in Figure 3A, it can be manufactured at low cost with fewer steps.

(3) in the above explanation regarding the manufacturing process and claims (up to the state shown in "Figure 6"),
It is also possible to have the product made by the manufacturer and each user to perform subsequent processing (tearing off the welded part).

Therefore, only the manufacturer's process in such a case is required for the configuration.

[Brief explanation of drawings]

Figures 1 and 2 are illustrations of conventional square paper balloons;
11 are related to embodiments of the present invention, and FIGS. 3A, B, 0,
Figures 4, 6, and 9 are explanations showing the middle of the process in order,
The V-■ cross section of Figure 4 is shown in Figure 5, and the cross section of Figure 6 is
and ux-ax cross sections are shown in FIGS. 7 and 8. FIG. 10 is a perspective view of the completed state, and FIG. 11 is a perspective view of the inflated state. 10...Tubular plastic film, 1
2.14...Side sides, 16...Inner space, 18 and 19...Welded parts, 20 and 22...
... Cutting line, 28° 28A --- Hexagon, 30,
30A... one bite.

Claims (1)

[Claims] 1. Push the opposing sides of the tubular plastic film 10 inward until they almost touch each other, so that the air inside forms a horizontal H shape, and the entire gap between the sides is All four pieces are welded together at appropriate intervals into two V shapes with their tops facing or touching 1B, 19, and one of the The weld 18 is cut so that the entire cutting line 20 is above it, and the other weld 19 is cut so that almost the entire cutting line 22 is above it, but only the top 221 is above it. A hexagonal body is formed in which both sides protrude in a triangular shape by cutting the hexagonal body so that it is outside the welding part 19, and the opening 30 is provided in the part of the top part 221 that is outside the welding part 19.
A method for manufacturing plastic containers and balloons characterized by: 2. The method for manufacturing plastic containers and balloons according to claim 1, characterized in that welding and cutting are performed at the same time.