JPS6015140A - Manufacture of square pillar vessel - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a container including a body having a rectangular cross-sectional shape, and particularly relates to a method for manufacturing a container having a body having a polygonal cross-section. While winding it in a cylindrical shape on a mandrel that is slightly curved inward on each side constituting a polygon, the overlapping parts are glued, and after fixing a closing member to the open end of the mandrel, the internal pressure of the mandrel is reduced. It is characterized by the fact that vacuum suction is applied using the provided suction holes, thereby creating a polygonal shape by recessing the body member to match the cross-sectional shape of the mandrel, and is suitable as a method for manufacturing paper containers for high-temperature filling of G-su etc. ing.

Conventionally, paper containers for high-temperature filling of juices, etc., have been equipped with a tab (with a regular shape on the body) to prevent the container from denting and irregular deformation due to negative pressure phenomenon. The idea of creating ruled lines is well known.However,
Even in the case of containers with ruled lines on the body, they do not necessarily deform (concave) into a regular shape due to negative pressure phenomena.
A problem unrelated to the ruled lines was that they were unsightly deformed, impairing quality and appearance.

Therefore, in order to solve this problem, the above-mentioned ruled lines are provided, and the body of the J cavity is indented in advance along the ruled lines before filling. In this case, the body is inserted into a mandrel with a polygonal cross section, and the body is pressed by some mechanical means from the outside. I thought of a model that sucks from the side and mixes it concavely.

The present invention will be explained in detail based on the embodiments shown in the drawings.

First, the body member (1), which has a rectangular shape as shown in Fig. 1 and is made of a laminated material made of a combination of at least two of paper, synthetic resin, and metal foil, is shown in Figs. 5r Each side of an arbitrary polygon is concave inward to form a curved surface (3),
The boundary between adjacent curved surfaces (31 (3+) is the protrusion (4) and 1
．． It has a cross-sectional shape similar to that of a starfish.

-) On the surface of each curved surface (3), an appropriate number of small field holes (6) are provided in the suction hole (5) in the center in the axial direction. (7) A presser foot (8) is provided through the gripping shell (not shown) provided in the protrusion (4) on the mandrel M, and the end thereof is clamped and the mandrel (to) is rotated. Then, the overlapping parts are glued together using ultrasonic sealing etc. to form a cylinder, and the closing part A'A (2) is fixed to one open end of the cylinder. B) is provided in the center of the hole (
The body member (1) is vacuum-suctioned through the small hole (6) by a vacuum suction source (not shown) communicating with the suction hole (5) through the small
1'< Concave along the curved surface (3) of the mandrel (A).

As a result, the protrusion (4) of the mandrel should be
The body member (1) at this point becomes the ridge line (10), and as shown by the body line in Figure 3, the body part (Moon ) will be formed.

In this way, the prismatic body (11) is closed (not the other open R+ end) and the 90 mm
Fill it at about ℃ (with another closing member (12)
If so, the assembly of the container (0) is complete.

Regarding the mandrel (to), if a small hole (6) is provided not only on the curved surface (3) but also on the upper t/rc of the protrusion (4), the ridgeline (10) of the body (ii) That part is more clearly formed.

The present invention is as follows. [Because of its structure, it has the following excellent practical effects.

3- (1') Unlike the conventional method of pressing the body member from the outside on a mandrel by mechanical means, vacuum is applied from the inside of the mandrel without contacting the body member such as another jig. Since the body parts are dented and mixed by suction, there is no need to damage or wrinkle the surface of the body parts. .

(r:I Unlike conventional methods, it is not necessary to provide ruled lines on the body member, which leads to a reduction in the number of processes. . As a result, the operation is simple and the work efficiency is high.

eC) In the conventional suppression method, the body member is folded by moving the jig, so the folding tool passes only once by focusing on one point on the body member, whereas the method of the present invention uses the vacuum suction force. Since it is applied to the entire body member at the same time, it is possible to take a long time for shaping, and it is possible to form an accurate π-angular shape and a 1-rotated shape.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and Fig. 1-4 is a developed plan view of a container body member according to the present invention, Fig. 2 is a perspective view of a mandrel used in the present invention, and Fig. 6 is the same. (−q
4 is a longitudinal sectional view of the same, and FIG. 5 is a perspective view of a paper container manufactured according to the present invention. (1)...Body member (2)...Bottom member (3)...Curved surface (4)...Protrusion (5)...Suction hole (4)
(Gl'... Small hole (Force... Backing ■ Presser ■... Hole (10)... Ridge line (1)... Body f21 (12) Closing member patent applicant Representative of Toppan Printing Co., Ltd. Aio Suzuki Figure 1 1 Figure 2 Hand 4c Neyama iF (Method) 1. Indication of the incident 1988 Patent Application No. 124448 2 Name of the invention Method for manufacturing square cylindrical containers 3 Relationship with the case of the person making the amendment Patent applicant address 1-5-1 Taito 1-5, Taito-ku, Tokyo, subject of amendment 6, detailed statement of contents of amendment, page 6, lines 2 and 3, Figure 3 is the same -2=

Claims (1)

[Claims] In manufacturing a container in which closing members are provided at the upper and lower opening ends of a rectangular cylindrical body, the body member has a cross-sectional shape of an arbitrary polygon with each side concave inward to form a curved surface, and The surface constituted by each side is wound into a cylindrical shape on a mandrel having a small hole communicating with the central suction hole, the overlapping parts are glued, and a closing member is fixed to one open end. Vacuum suction is applied through the small hole by the suction hole of the mandrel to make the body concave in accordance with the cross-sectional shape of the mandrel, and then compressed air is sent from the small hole through the suction hole to separate the body from the mandrel. A method for manufacturing a rectangular cylindrical container, characterized in that closing members are provided at multiple open ends.