DE1479138A1 - Machine for making containers from thin material - Google Patents

Description

The invention relates to containers made of material of small thickness, such as cellulose, plastic or metal, which are used as lost packaging for food of all types. It is applicable to containers of any geometric profile: cylindrical, truncated cone, parallelepiped or others of any cross-section: circular, oval, square, rectangular or others with plates or indented bottom, a smooth wall and / or a folded or corrugated wall with a cylindrical Upper part on the wall for the eventual inclusion of a lid. Its purpose is to form a flat peripheral edge which protrudes outwardly perpendicular to the axis of the container and consists of two superimposed material thicknesses in order to form a stiffening and reinforcing element. Thanks to the device that is the object of the present invention, it becomes fast and economical with high

Production speed created an edge, the outer contour of which corresponds to the cross-section of the object.

According to an important characteristic of the invention, the device consists of combining known means, such as a Form punches and a die, which allow the described object to be produced directly, as well as from concentric aids, which consist of a double-acting ring stamp, which is mounted on a cylindrical part of the forming stamp centered and movable with respect to it, as well as from an annular side press concentric with the die is and o.ux'ch the movement of the ring is moved so that the sheet of material from which the edge is formed is to be bent down partially parallel to the axis of the container so that it forms a right angle that it is then inclined towards the axis and finally is pressed by the rare press against the forming die to form the final edge, which is made up of two layers of material and is perpendicular to the container axis.

In the accompanying drawings showing an embodiment of the device according to the invention are: 1 to 5 are partial longitudinal sections showing the various stages of manufacture and the mode of operation of the apparatus

show and
Fig. Β is a longitudinal sectional view of the finished object.

In the figures, in which the same elements are provided with the same reference numerals, a forming die 1 is at work and a die 2 zuc ^ ocmun ^ eJ.ngs container together,

3 U79138

whose outer frustoconical profile has a flat bottom 3 * a conical wall 3b formed in a cylindrical part 3c ends and has an edge 3a. Like from Pig. I can be seen has the edge 3a lying perpendicular to the container axis during the shape too great a length. The die 2 generally carried by a column 8 on the machine is externally cylindrical and has a shoulder 2a on its upper part, on which during the downward movement of the forming die 1 the part 3c of the container comes to rest. A side press 4 is arranged concentrically to the die 2. This side press is dormant; on the machine frame on ™

Springs 9 · It has an annular shoulder 4a on its upper part, the width of which corresponds to that of the edge to be created. A support surface 4b is provided on the side press, around the shoulder on which a ring punch 5 presses as it moves parallel to the axis of the machine. During the shaping of the container, the shoulder 4a hits one. Shoulder 4b of the forming die and the edge 3a is clamped between the two shoulders by the force supplied by the springs 9. The ring punch 5 is arranged concentrically * to the upper cylindrical part of the forming punch 1. Its diameter corresponds to that of the die on which it can slide. The lower part of the ring, however, has a slightly larger diameter. A cavity 5t »is arranged between the two bores of the ring punch. The diameter of the shoulder 4a is also slightly larger than that of the cylindrical part Ib.

In order to shape the container, the die 1 is turned downwards moves unogtMtt.irL die. Die 2 oin * Per container is with

its bottom ~ $, its wall ya _{t provided} an upper cylindrical part 3c-3d, and with an edge lying perpendicular to the axis, which protrudes beyond the external diameter of the forming die 1 by the folding length to be carried out. The forming punch and the die remain fixed while the ring punch 5 is moved in the direction of the arrow £ ^ . The lower part of the ring punch presses on the edge part which protrudes over the shoulder 4a of the rare press and bends it close to the bottom and presses it against the outer side wall of the shoulder. The edge is thus bent square. The ring W stamp 5 moves further down and reaches the support . i "surface of the side press and presses it downwards (Fig. j5). The rectangle is no longer supported by the shoulder 4a and : is at the level of the cavity. Since the angle of the

! If the rectangle protrudes slightly beyond the outer diameter of the molding die 1, the ring die abuts it through its bore 6 and inclines the rectangle along the axis, whereupon it moves upwards (f _o , FIG. 5). The side press 4 set free in this way is activated by the action of the spring 9; pressed upwards (fx * Fig. 5) and the shoulder 4a can compress the fold, whereby the final edge is created on the shoulder la of the forming die. The edge consists of two I-iaterialla.gen lying on top of each other and pressed together. The work process repeats itself with a -.

The described Voitj cJitung bet '··: l .'-'"c natural. '. I the middle. ·, Zir .. · making the edge e'uos Boiiil ^ ei: j U of de; .-! 7e; 'iJiroii ^ ur shaping dor; ob citer :: ütrij ^ e;

909806 / 09A6

Folding or other known means, the principle described is lamer applicable and the possible design changes depending on the chosen method are included in the scope of the invention.

- 5 -909806/0946

Claims (2)

1. Device, suitable for containers, lost packages of thin material created by stamping, slitting, or other known means, any of which have outer profiles and cross-sections, with an upper cylindrical part for receiving a cover, thereby characterized in that it enables the end part of the wall to be bent perpendicular to the axis of the container and to partially bend the kink created in this way in order to create an edge whose circumference corresponds to that of the cross-section of the Container corresponds and consists of two superimposed layers of material to form a stiffening edge. 2. Device according to claim 1, characterized in that the connection of known means, die and die for shaping the container nib a protruding edge, ax perpendicular to the axis of the container, and with tools that are arranged concentrically to the first and from consist of a double-acting tempering ring, which is movable in relation to the forming punch and can slide on it, while a side press concentric to the die is set in motion by the downward movement of the ring punch and successively bends the excess length of the edge downwards to a to form rectangle schliesolich bent inwardly v / lrd, mn to provide an edge of two larvae whose circumferential üem of the cross section corresponds to the Behaltero. 909806/0946 "Β Device according to claim 2, characterized in that the ring die has two different bores separated by a cavity, the one of the upper part corresponding to the durometer of the form die, while that of the lower part corresponds to the outer, somewhat larger diameter of the shoulder of the side press so that the ^ring! stamp First, the material sheet parallel to the machine axis bends, the side press having moved, is released whereby the formed fait and anschllessend runs upwards, which can press together by the spring upwardly pressed side press the paiz to the forming die and so forms the ™ final edge. 90 98 06/094 6 _{βΛ0 0} i * 6 »l * M.