JPS5828108B2 - Red-bellied staghorn lily - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for molding a laminated sheet container mainly composed of paper and coated with synthetic resin films on both sides.
Furthermore, in this type of container, which is generally called a composite container, the assembly of the cylinder and the thin aluminum plate can be strengthened, and at the same time, the assembly of the cylinder to the cylinder can be more completely sealed. It was made so that it would become so.

Hereinafter, the present invention will be explained with reference to the drawings. The laminated sheet body 1 (see FIG. 1) is a laminate of paper sheet Ha made of hard paper and aluminum foil 1b, and has water resistance, acid resistance, chemical resistance, and It has a structure covered with a resin film Ic, 1a made of a thermoplastic synthetic resin material having desired physical properties such as oil resistance, and is cut and formed into strips of predetermined dimensions determined according to the dimensions of the intended container. .

At both upper and lower edges of this strip-shaped laminated sheet body 1,
This end face is coated with a resin film 1c.

Resin rib 3 made of thermoplastic synthetic resin welded integrally with 1d
is shaped.

Various methods can be considered for moisture-proofing the upper and lower edges of the laminated sheet body 1 of the resin ribs 3, but from the viewpoint of automatic mass production, it is preferable to pass the laminated sheet body 1 in the form of a band through an extrusion molding machine. When passing through the extrusion molding machine, the extrusion molding machine forms resin ribs on both upper and lower edges of the laminated sheet body 1 (edges along the longitudinal direction of the laminated sheet body 1 in the form of a band) as part of the molding surface. It is advantageous to carry out moisture-proof molding of 3 in succession.

Therefore, when using the above-mentioned means, the strip-shaped laminated sheet body 1, on which resin ribs 3 have already been formed on both upper and lower edges thereof, is cut into a predetermined size and formed into a strip.

The laminated sheet body 1 with resin ribs 3 formed on the upper and lower edges is rolled up against the paper sheet Ha so that the aluminum foil 1b is on the inside, and the both side edges on which the resin ribs 3 are not formed are overlapped. The stacked edges on both sides are pressed uniformly from the stacking direction and are heat-sealed and joined to form the cylindrical body 2.

The joining by force-heat sealing between both side edges of the laminated sheet body 1 is achieved by welding together the resin film 1c on the inner side edge and the resin film 1d on the outer side edge. achieved.

At this time, consideration must be given so that the pressure applied to both side edges is applied uniformly to the entire area of both side edges.

This is because the thicknesses of the resin films 1c and 1d are extremely thin, so that if there is an uneven pressing force, there will be parts where the resin films Lc and 1d are not welded together.

Further, the end faces of both side edges of the laminated sheet body 1 forming the joint portion of the cylinder body 2 are exposed to the outside, that is, the paper sheet 1a and the aluminum foil 1b are exposed to the outside.

This may cause inconveniences such as moisture penetrating the paper sheet 1a and causing delamination, or the aluminum foil 1b corroding or melting into the content liquid. It is preferable to cover the side end surfaces with the same synthetic resin material as the resin films 1c and ia by some means such as using it as a container for storing the resin films 1c and ia.

The camp 4 that is fitted and assembled into both the upper and lower openings of the cylinder body 2 is an aluminum thin plate 40 whose at least one surface is coated with a thermoplastic synthetic resin film 41 that is integrally welded with the resin films 1c and Id.
It is formed by press working, and an inner cylinder part 4b having a low height and a cylinder shape is raised from the peripheral end of a flat lid part 4a having the same planar shape as the opening of the cylinder body 2. This inner cylinder part 4
It has a structure in which an outer cylindrical part 4d is provided around the outer cylinder part 4d in a flange shape outward from the upper end of the cylinder part 4c via a connecting part 4c.

At this time, the resin film 41 is processed so as to be located outside the inner cylinder c4b.

The cap 4 having such a structure is assembled into the opening of the cylinder body 2 until the resin rib 3 hits the connecting part 4c at the inner cylinder part 4b, and then the inner cylinder part 4b, the connecting part 4c, and the outer part are assembled. The outer cylinder part 4d is bent at the connecting part 4c (see Fig. 4) to wrap the end of the cylinder body 2 including the resin rib 3 with the cylinder part 4d to form a cylinder shape, and then the outer cylinder part 4d is formed into a cylinder shape. and inner cylinder =
The cap 4 is welded and fixed to the cylinder body 2 by heating and sealing the outer cylinder part 4d and the inner cylinder part 4b while pressing the resin rib 3 and the end of the cylinder body 2 between them.

When welding and fixing the camp 4 to the cylinder body 2 by heat treatment, the resin ribs 3 are the main body for strong assembly of the cylinder body 2 and the cap 4 and for liquid tightness between the cylinder body 2 and the cap 4. achieved.

That is, when heat-treated, the resin rib 3 melts and fills the spaces between the end of the cylinder 2, the inner cylinder 4b1, the connecting part 4c, and the outer cylinder 4d, and at the same time is integrally welded to the resin films 1c, Id, and 41, respectively. The cap 4 is strongly fixed to the cylindrical body 2, and at the same time, the gap between the cap 4 and the cylindrical body 2 is liquid-tightly closed.

'Now, regarding the adhesion of the camp 4 to the cylinder body 2 and the achievement of liquid tightness between the camp 4 and the cylinder body 2, the resin film 1
Although the integral welding of c, 1d and 41 is also effective, the resin films 1c, ld and 41 are extremely thin, while the inner cylinder part 4b and the outer cylinder part 4d (especially the outer cylinder part) 4d), many thin vertical grooves (wrinkles) are formed during molding, so integral welding of the resin films 1c, 1d and 41 in these vertical groove parts is not achieved, and the inner cylinder part The pressing force acting on the inner cylinder part 4b and the outer cylinder part 4d is
Also, since the outer cylinder portion 4d is cylindrical, it is difficult to apply a pressing force uniformly along its circumferential direction, which further promotes imperfection in the integral welding of the resin films 1c, 1d and 41. ing.

In particular, when it comes to achieving liquid tightness between the camp 4 and the cylinder body 2, integral welding of the resin films 1c, Id, and 41 is not very reliable.

As described above, the present invention enables the assembly of the camp 4 to the cylinder body 2 to be strongly and completely liquid-tight with a simple operation. Mechanical strength can be significantly increased.

In addition, this type of container is extremely inexpensive in terms of materials and production costs, so it can be used in a variety of ways as a simple container and has high utility value.

The reason why the laminated sheet body 1 is rolled up to form the cylinder body 2 so that the paper sheet Ha is on the outside with respect to the aluminum foil 1b is because the paper sheet surface that is easy to print is the surface of the container (in this case, the resin film It goes without saying that 1c is transparent), so that desired patterns and characters can be printed easily and beautifully, and the appearance of the container can be made beautiful in accordance with the product image.

[Brief explanation of the drawing]

Figure 1 is an overall perspective view of a laminated sheet body cut and molded into a rectangular shape with moisture-resistant resin ribs on both upper and lower edges, and an enlarged view of the laminated structure of the laminated sheet body and the moisture-resistant structure of the resin ribs. ing. FIG. 2 is a perspective view showing an operation mode for forming a cylindrical body using the laminated sheet body shown in FIG. 1. FIG. 3 is an assembled state diagram showing a mode of assembling the cap to the cylinder, and FIG. 4 is an enlarged vertical sectional view of the main part showing the structure of the main part of the assembly of the cylinder and the camp. FIG. 5 is an overall perspective view of the completed container. Explanation of symbols, 1: Laminated sheet body, 1a: Paper sheet, 1b
Ni aluminum foil, 1c, Id: Resin film, 2: Cylindrical body, 3: Resin rib, 4: Cap, 40 Ni aluminum thin plate, 41: Resin film, 4a: Lid, 4b: Inner cylinder, 4c: Connecting part, 4d :Outer cylinder part.

Claims (1)

[Claims] 1 Thermoplastic synthetic resin films 1c and 1d with desired physical properties are applied to both sides of a laminate of a paper sheet 11a made of hard paper and an aluminum foil 1b.
A resin film 1c is formed by covering the upper and lower edges of the laminated sheet body 1, which has a rectangular shape of a predetermined size and is coated with the resin film 1c.
, 1d are integrally welded, and the resin ribs 3 are shaped by rolling the laminated sheet body 1 so that the aluminum foil 1b is on the inside with respect to the paper sheet 1a. The cylindrical body 2 is formed by overlapping the unfinished side edges and pressing along the direction of overlapping and heat-sealing with force.
At both the upper and lower openings of the cylinder body 2, an inner cylinder part 4b having a low height and a cylinder shape is provided upright from the peripheral end of a flat lid part 4a having the same planar shape as the opening part. The outer cylindrical portion 4d is integrally welded with the resin films 1c and ld to at least the outer peripheral surface side of the inner cylindrical portion 4b, which is provided around the outer cylindrical portion 4d in a seven-lung shape from the upper end of the portion 4b through the connecting portion 4c. A camp 4 made of a thin aluminum plate 40 covered with a thermoplastic synthetic resin film 41 is fitted into the inner cylindrical part 4b, and connected to the corresponding rear cylindrical part 4b.
The outer cylinder part 4d is bent at the connecting part 4c and formed into a cylinder shape in order to cover the end of the cylinder body 2 with the resin rib 3 shaped by the Vr4c and the outer cylinder part 4d, and then the outer cylinder part 4d and the inner cylinder part 4d are bent. Cylinder part 4
A method for molding a container made of a laminated sheet in which both sides of the container are coated with a synthetic resin film, in which two ends of the cylindrical body are compressed and sandwiched between the two ends and simultaneously heat-sealed.