SK279775B6 - Method for manufacturing a dismountable container - Google Patents

Abstract

A method for manufacturing a dismountable container (10), in which firstly an essentially hollow-cylindrical body part (12) is formed from a first material, in particular cardboard or plastic material, the body part (12) is sealed at one end face with a first covering forming a bottom, the part-container consisting of the body part (12) and the first covering is filled with a filler material, and the body part is finally sealed tightly at its end face, facing away from the first covering, with a second covering (14) forming a lid, the connection at least of the second covering to the body part (12) being brought about by producing a folded sealing edge, consisting both of the first material and of the material of the (relevant) covering, by means of a fold sealing machine having a leading roll and a trailing roll, and at least one separation line, which forms a closed circle and is concentrical to the longitudinal axis of the container (10), being applied directly adjacent to the folded sealing edge. The manufacturing method is characterised in that at least the second covering is formed from a second material, in particular sheet metal, which differs from the first material, and in that the separating line(s) (12c) is/are made by (a) cutting device(s) (30), adjacent to the leading and/or trailing roll (20) of the fold sealing machine as line(s) of weakness (12c) which do(es) not pass right through the material of the body part (12) or of the (relevant) covering(s).

Description

SK 279775 Β6

Technical field

The invention relates to a collapsible container.

BACKGROUND OF THE INVENTION

A method of this kind is known from DE-AS 25 26 536, according to which a dividing line is made such that after the production of the flange joint between the fuselage and the cover, both of which consist of cardboard, the fuselage is cut by sawing. the edge of the lid. This separates the cover including the edge of the hem joint from the fuselage. Subsequently, the previously cut fuselage ends are reconnected to the remainder by means of an adhesive tape. Thus, the hull is cut to finally make a bond between the hull and the cover. Packaging containers whose cover consists of a material other than the fuselage and is connected to the fuselage without finally cutting and re-gluing the fuselage cannot be produced in this way. Naturally, the method does not guarantee any separate disposal of the material from the hull and cover, since the same material is used on both parts of the container.

DE-PS 20 57 350 discloses a method according to which a container consisting of glued parts of a carton is provided with weakened lines for separating its parts. The weakened lines are already formed in the corresponding parts of the carton before gluing.

DE-OS 40 27 396 discloses a container made of one-piece carton blank and a connectable closure cover, wherein a tear line is formed in the closure cover to facilitate tearing of the container before folding.

Furthermore, DE-OS 40 33 170 discloses a container made essentially of cardboard material, the fuselage of which is made so that not only the upper but also the lower edge is secured by means of a belt graspable tear fiber. After gluing the parts of the cartons forming the container, the tear fibers serve at least partially to open the container and thus facilitate its unfolding.

Also, both DE-PS 16 07 925 and DE-PS 17 82 176 relate to sealing caps which each have a tear line formed along the hinged part in the form of a weakened line circulating along the transverse section and which can be fitted to the corresponding part of the fuselage for sealing container.

The formation of weakened lines in the parts that will eventually be used when folding the container firmly can cause difficulties if mechanical forces are required for folding. Should the container consist of two non-bondable or non-bondable materials, such as e.g. thus, it is necessary to take into account the possibility of deformations or cracks in the weakened lines due to the application of mechanical forces when closing the container.

Especially for containers composed of different materials, it is important that the containers can be decomposed into recyclable parts for reprocessing.

It is known from DE-OS 22 30 115 to produce shrink-wrap packaging in which a perforated line is formed on both sides of the weld seam or part of the weld by means of a perforating knife. In doing so, a weakened line is formed in the forming of the closure, but this is not the problem of the production of the collapsible container described above. The same applies to DE-OS 28 08 708, where the manufacture of a hose package with weakened lines is described. Finally, DE-PS 39 01 489 discloses a shell package in which the shell shell cover defines a portion of the tear by means of a tear-thinned line, but which has nothing to do with the production of the collapsible container according to the method.

SUMMARY OF THE INVENTION

SUMMARY OF THE INVENTION The object of the present invention is to provide a method for producing a collapsible container so that a container consisting of at least two different materials can be decomposed into individual materials and thus prepare for recycling.

According to the invention, this object is achieved by a method characterized by the features set forth in claim 1.

Preferred embodiments of the invention are the subject of the dependent claims.

The invention provides a surprising finding that it is possible to combine two different materials to form a container and to form at least one weakened line in at least one of the two materials for later separation of the two materials in a single work step that is time and cost saving and without stress. as well as the resulting detrimental consequences for the weakened line, especially when closing using mechanical forces.

Overview of the figures in the drawing

BRIEF DESCRIPTION OF THE DRAWINGS The invention will be explained in more detail with reference to the drawing, in which: FIG. 1 shows a front view of the container before the hull and the bottom are closed by a cover, FIG. 2 is a cross-sectional view of a container when closed according to a preferred embodiment of the invention.

DETAILED DESCRIPTION OF THE INVENTION

As shown in FIG. 1, the container 10, which can be closed and unfolded in the filled state, consists of a hull 12 comprising a bottom at the lower edge 12b and a cover 14 which can be fitted and closed from the upper edge 12a of the hull 12 to close the container 10 as shown in FIG. 2. According to a preferred embodiment of the invention, the hull 12 and the bottom consist essentially of cardboard material and the cover 14 is made of sheet metal.

In FIG. 2 is a partial cross-sectional view of a closed flange 16 forming a joint between a lid 14 made of sheet metal and a hull 12 made of cardboard material. The connection is in the form of a two-edged joint, whereby the rear roller 20 of the closing binder used for closing can be seen. In addition, FIG. 2 shows a circular knife 30 forming a weakened line 12c in the hull 12. Along the weakened line 12c, which is formed by a circular knife blade 30 in the form of e.g. According to the invention, the closed container can be opened at any time by gripping the bead 16 and the hull 12, at the same time separating the cardboard material and the sheet up to the actual area of the bead 16. After the container has been emptied, the sheet can be deposited separately. and cardboard material and then handed over for recycling.

The collapsible container 10 is manufactured according to the invention as follows;

First, the bottom fuselage 12 is punched out of the cardboard material, an open container is formed without a cover, and in this assembly it is firmly glued.

The stored material is then filled into an open container.

In the next step, the sheet-formed cover 14 is mounted on the hull 12 along its upper edge 12a. In this case, the front roller of the closing beading machine (not shown) ensures, by means of mechanical force, that the cover 14 bends such that its outer edge grips the upper edge 12a of the hull 12.

Then, with the rear roller 20, again using the mechanical force, the birefringent closure shown in FIG. At the same time, the circular knife 30, coupled to the closing bead and located below the rear roller 20, provides a weakened line 12c in the hull 12, the depth of which is predetermined.

By providing the first bend the tear line formed by the weakened line 12c is substantially stabilized, it is possible to create a double bead without problems while cutting the cardboard material.

In order to facilitate the opening of the closed container 10, according to the invention, another circular knife can be connected to the rear roller 20 so as to form a further weakened line of the housing 14 which forms a tear line adjacent the bead 16. Then the container can be easily extended along the two thus obtained weakened lines on the sheet from the cover 14, the carton material from the hull 12 and the bottom, as well as the combination of the sheet and the carton material from the birefringent joint surrounding the bead 16. This allows optimal distribution of the recoverable parts of the container 10 in terms of dual system.

Of course, according to the invention, the weakened line can also be made in a single-material container, so that the container can be folded in order to save space after emptying.

It is also possible for the weakened lines according to the invention to be positioned in containers which consist of more than two materials so that the containers can be broken down into recyclable parts.

The features of the invention set forth in the description of the figures and in the claims may be essential to the practice of the invention both individually and in any combination.

Claims (13)

Method for producing a collapsible container, in which a substantially hollow cylindrical hull is first formed of a first material, in particular of cardboard or plastic, the hull being closed on the front side with a first bottom-forming closure into the partial container consisting of a hull and the first closure is filled with the material to be stored, and then the hull on the side facing away from the first closure is sealed with a second closure forming the cover, wherein the at least second closure is joined to the hull by making a flange connection of both the first material and the closure material. at least one separating line, circularly closed and concentric with the longitudinal axis of the container, characterized in that at least the second closure is formed of a second material which is different from the first material, in particular of shoulder and wherein the dividing line (s) is / are formed by at least one cutting device adjacent to the front or rear roller of the closing binder as dividing lines which do not completely pass through the material of the hull and / or caps. Method according to claim 1, characterized in that a cutting device with a closing bead is used. Method according to claim 1 or 2, characterized in that a first weakened line is formed in the hull near the edge of the flange joint of the second closure. Method according to one of the preceding claims, characterized in that a second weakened line is formed in the second closure near the edge of the skirt joint. Method according to one of the preceding claims, characterized in that a third weakened torso line is formed near the edge of the flange joint with the first closure. Method according to one of the preceding claims, characterized in that a fourth weakened line is formed in the bottom of the first closure near the edge of the flange joint with the first closure. Method according to one of the preceding claims, characterized in that a cutting device with at least one cutting edge is used. Method according to one of the preceding claims, characterized in that a cutting device is used, the cutting edge of which is formed by a tooth profile. Method according to claim 7, characterized in that a cutting device is used, the cutting edge of which is formed by at least one knife blade. Method according to one of the preceding claims, characterized in that a cutting device with adjustable blade wings is used. Method according to one of the preceding claims, characterized in that a cutting device is used which is formed by a trailing knife. Method according to one of Claims 1 to 10, characterized in that a cutting device is used which consists of a circular knife. Method according to one of claims 1 to 10, characterized in that the at least one weakened line is formed by means of a grooving device.