EP3895997A1 - Packaging machine - Google Patents

Abstract

A packaging machine for packing objects in a paper package with feed devices for an upper and a lower paper layer (12, 13), a package feed device, a connecting device (I) for connecting the paper layers in front of and behind a supplied package (11), as well as with side curling or side folding devices (III) for folding in or rolling in the side edges of the paper layers (12, 13).

Description

With the background of providing environmentally friendly packaging for an automated packaging process for objects of different sizes, paper packaging was developed which is made from two rectangular paper layers lying one above the other, which are glued to one another on two first opposite side edges, the paper layers on the two second opposite side edges are rolled in or rolled in together and wherein the folded or rolled edges are fixed by means of an adhesive connection or a connecting means.

The present invention is based on the object of providing a machine and a method which allow an efficient packaging of objects of different sizes in such paper packaging.

The object is achieved by a packaging machine for packing objects in a paper package with feed devices for an upper and a lower paper layer, a package feed device, a connecting device for connecting the paper layers in front of and behind a supplied package, as well as with side curling or side folding devices for folding, folding or curling up the side edges of the paper layers.

The connecting device allows the paper layers to be connected to one another in close contact with one another at the side edges lying opposite in the transport direction of the package. With the help of the side roll-up or side-folding devices, the other two side edges of the paper layers can also be rolled up or folded in or folded so that the packaging also tightly encloses the package transversely to its transport direction. The result is a paper band that is closed on the side. Paper layers of the same width can be used for objects of very different widths. The difference in size of the objects or packages is compensated for by rolling in or folding in the side edges to a greater or lesser extent. For this purpose, the side-rolling or side-folding devices can expediently be arranged to be movable transversely to the transport direction of the packages.

The connecting device can preferably have a glue application device. However, the paper layers can also be connected to one another in other ways, for example by crimping, stapling, sewing or by means of adhesive tapes.

The connecting device can also have a separating device for separating the connected paper layers behind an incoming package. This enables continuous packaging of a large number of objects of different sizes. As soon as the paper layers of a package have been connected to each other in the transport direction behind the package, the connected paper layers are separated and a new package is brought in, while the already partially packed package is transported to the side-rolling or side-folding devices. If a glue application device is used to connect the paper layers, it can apply a double glue line and the paper layers can be separated between the glue lines. In this way, a paper curtain is created which is already connected, in particular glued, on the front (in front of the incoming package) and which is ready for the next package.

Further advantages result if the packaging machine has a pull-off device for the paper layers connected to one another, which device can be moved in and against the transport direction of the package. Such a take-off device also allows the packaging of soft and / or light objects which would not be able to move the interconnected paper layers independently in their transport direction during insertion. The pull-off device for the paper layers can have gripping tongs that grasp the paper layers at the edges.

Furthermore, the packaging machine can have devices for securing the folded or rolled-in edges against rolling up. These devices can be glue application devices, for example. Clamping, sewing or crimping of the rolled-up edges by means of the devices is also possible. Or a device for applying an adhesive tape to secure the edges can be provided.

In order to be able to produce packaging with as little tension as possible, it is also advantageous if the side-rolling or side-folding devices can each be moved to half the height of the packages before the start of the rolling-in process.

It is also possible not to activate the page curling or page folding devices. The packaging machine can then be used for banding objects.

The packaging machine can optionally have a further station for folding in or folding the side edges in front of the side curling or side folding device. This station can also be set up to fix the tucked-in side edges in the tucked-in state. For example, the station can be designed as a type of crimping or clinching station. By means of such a station, the side edges can, for example, be turned over or folded once and fixed in the turned-over position. One or more mandrels, in particular 3-5 mandrels, can move from below through the packaging edge into compression sleeves arranged above the wrapped packaging edge (which has several layers of paper at this point). Paper enters a channel between the mandrel and the core. The paper is then compressed by the sleeve and thus remains in its position. A hollow rivet effect is created. This prevents the wrapped edge of the packaging from resetting itself, i.e. unrolling or unfolding. The width of the station can be adjusted so that it can be adapted to different packaging widths. In particular, an automatic setting can take place as a function of the detected width of the object to be packaged.

The packaging machine can furthermore have one, preferably two, stations for introducing reclosable adhesive strips. A reclosable adhesive strip can thus be arranged on opposite side edges. This makes the packaging reusable. For example, the packaging can initially be closed by means of the connection, in particular an adhesive connection. The recipient of the packaging can open the packaging by releasing the connection. A protective strip can then be peeled off the reclosable adhesive strip and the packaging, e.g. for a return, can be closed on the previously opened side edge using the reclosable adhesive strip.

1. a. Zuführen einer oberen und einer unteren Papierlage senkrecht zu einer Transportrichtung eines Packstücks;
2. b. Verbinden der Papierlagen an ihren vorderen Rändern;
3. c. Einführen eines Packstücks zwischen die Papierlagen;
4. d. Verbinden der Papierlagen hinter dem Packstück;
5. e. Einrollen oder Einschlagen der Seitenränder der Papierlagen und Sichern der eingeschlagenen oder eingerollten Ränder gegen ein Aufrollen.

The invention also relates to a method for packaging objects in paper packaging, comprising the steps:

1. a. Feeding an upper and a lower paper layer perpendicular to a transport direction of a package;
2. b. Joining the layers of paper at their leading edges;
3. c. Inserting a package between the paper layers;
4. d. Joining the paper layers behind the package;
5. e. Rolling in or folding in the side edges of the paper layers and securing the folded or rolled edges against rolling up.

A package here means an object to be packaged that is inserted between the paper layers. To carry out the method, for example, a packaging machine according to the invention can be used which allows fully automated and continuous packaging of objects of different sizes in paper packaging.

The paper layers can each be pulled off from paper supply rolls. This allows waste-free packaging of objects of different sizes in any order. The paper layers can be connected to each other behind the package and cut off precisely. The side edges of the paper layers are then rolled up or folded in or folded so that the packaging also tightly encloses the object on the sides.

After performing step d. a new package can already be added. This enables a continuous, clocked packaging process in which items of different sizes can be packed in a free sequence and without having to convert the machine in the meantime.

It is also advantageous if the interconnected paper layers are pulled off in the transport direction of the package before a package is inserted between the paper layers. Light objects or objects that are not inherently rigid can also be packed in this way.

The connection of the paper layers and the folding in or curling of the side edges of the paper layers can preferably take place at at least approximately half the height of the package. This is the most effective way of avoiding wrinkles and tension in the packaging.

To make it easier to roll up the side edges, the side edges of the paper layers can be laid flat on top of each other before they are rolled up, folded or tucked in together. It is also conceivable to fix the side edges placed on top of one another before rolling.

In the following, a preferred embodiment of a packaging machine and a method according to the invention will be described in more detail with reference to the drawing.

Fig. 1:

eine schematische Seitenansicht einer Verpackungsmaschine;

Fig. 2a, b:

eine schematische Darstellung der Schritte eines Verfahrens zum Verpacken eines Gegenstandes teilweise a) in einer Seitenansicht und teilweise b) in einer Querschnittsdarstellung mit der Maschine aus Fig. 1;

Fig. 3

eine perspektivische Ansicht eines verpackten Gegenstandes.

Show in detail:

Fig. 1:

a schematic side view of a packaging machine;

Fig. 2a, b:

a schematic representation of the steps of a method for packaging an object partially a) in a side view and partially b) in a cross-sectional view with the machine Fig. 1 ;

Fig. 3

a perspective view of a packaged item.

In the Fig. 1 Machine 10 shown for packing an object / package 11 in a package made of an upper paper layer 12 and a lower paper layer 13 has a connecting and separating device I, an optional device II for laying on top of one another and folding and optionally fixing, for example by crimping, the lateral edges of the Paper layers 12, 13 as well as a side curling or side folding device III, a device IV for securing the rolled edges against rolling up and a device V for transporting away a fully packaged object. The devices and devices III, IV and V are all arranged in the same machine area. The function of the individual devices is described with reference to Fig. 2 described in more detail. The direction of transport of the package 11 through the machine is indicated by an arrow T.

Steps 1 through 5 in Fig. 2a explain the beginning of the packaging of the article 11 until it leaves the connecting and separating device I. Fig. 1 . The 1st step shows an incoming package 11, upper and lower paper layers 12, 13 connected to one another at their free end to form a paper curtain, and a pull-off device 14 for the paper layers 12, 13, which in the 2nd step the connected paper layers 12, 13 in the transport direction T pulls over a feed table 16 so that the package 11 can be inserted between the paper layers 12, 13 (3rd step). Subsequently, in the 4th and 5th step, the paper layers 12, 13 behind the package 11 are glued together and separated at half the height by the connecting and separating device I, so that the package 11 apart from its sides from the paper layers 12, 13 in one Art banderole is included and a new paper curtain for that Packing a new item 11 'is ready (6th step). In the fourth step, a glue line is applied by means of a glue application device 15.

While the 1st to 6th steps were shown in a schematic side view of the machine 10, the following steps 7-10 are shown in a cross-sectional illustration along the line B-B through the package 11. The 6th step is shown both in the side view and in cross section. The cross-sectional illustration illustrates the side edges of the upper and lower paper layers 12, 13 that are still open after the paper layers 12, 13 have been separated by the connecting and separating device I.

In the following 7th step, the open side edges of the paper layers 12, 13 are brought together halfway up the package 11 and folded upwards in the edge area.

In the 8th step, which is shown once for a large package 11 and once for a small package 11k, the folded side edges of the paper layers 12, 13 are fixed from below by vacuum strips 17, while glue application devices 18 each have a glue line parallel to the side edges of the package Apply 11, 11k and at the same time press the paper layers 12, 13 against the vacuum strips 17. In the 8th step, the side curling or side folding devices III are already shown, which can be moved perpendicular to the transport direction T in the direction of the arrows 19 towards the package and thus the side edges of the paper layers 12, 13 can roll in until the glue line is reached.

Subsequently, in the 9th step, the rolled-up side edges 20 are pressed together by stamps 21, thereby activating the security through the glue line. The 10th step shows the finished packaged package 11 with the flattened and glued rolled edges 20 in cross section.

Fig. 3 shows the fully packaged object 11 in a perspective overall view. The rolled-up, compressed and glued-in rolled-up edges 20 can be seen, which lie just as closely on the object 11 as the other two interconnected side edges 22, 23 of the paper layers 12, 13.

Instead of layers 12, 13 made of paper, in particular made of Kraft paper, other materials such as nonwovens made of polyethylene (Tyvek) or coated types of paper or textile materials and foils can also be used to produce the packaging.

Claims (16)

Packaging machine for packing objects in paper packaging with feed devices for an upper and a lower paper layer (12, 13), a package feed device, a connecting device (I) for connecting the paper layers in front of and behind a supplied package (11, 11 '), as well as with Seiteneinroll- or side-folding devices (III) for folding, folding or rolling in the side edges of the paper layers (12, 13). Packaging machine according to Claim 1, characterized in that the connecting device (I) has a glue application device (15). Packaging machine according to Claim 1 or 2, characterized in that the connecting device (I) has a separating device for separating the connected paper layers (12, 13) behind an incoming package (11). Packaging machine according to one of the preceding claims, characterized in that it has a pull-off device (14) for the interconnected paper layers (12, 13) which can be moved in and against the transport direction (T) of the package (11). Packaging machine according to Claim 4, characterized in that the pull-off device (14) for the paper layers (12, 13) has gripping tongs which grasp the paper layers (12, 13) at the edges. Packaging machine according to one of the preceding claims, characterized in that it has devices (IV) for securing the folded or rolled-in edges (20) against rolling up. Packaging machine according to Claim 6, characterized in that the devices (IV) for securing the folded or rolled-in edges (20) have glue application devices (18). Packaging machine according to one of the preceding claims, characterized in that the side curling or side folding devices (III) are arranged to be movable transversely to the transport direction (T) of the packages (11). Packaging machine according to one of the preceding claims, characterized in that the side rolling or side folding devices (III) can each be moved to half the height of the packages (11) before the start of the rolling process. Method for packing objects in a paper package with the steps: a. Feeding an upper and a lower paper layer (12, 13) perpendicular to a transport direction (T) of a package (11); b. Joining the paper plies (12, 13) at their leading edges; c. Inserting a package (11) between the paper layers (12, 13); d. Connecting the paper layers (12, 13) behind the package (11); e. Rolling in or folding in the side edges of the paper layers (12, 13) and securing the folded or rolled edges (20) against rolling up. Method according to Claim 10, characterized in that the paper layers (12, 13) are each drawn off and fed from paper supply rolls. Method according to Claim 11, characterized in that after the paper layers (12, 13) have been connected behind the package (11), the connected paper layers (12, 13) are separated. Method according to one of claims 10 to 12, characterized in that after step d. a new package (11 ') is supplied. Method according to one of Claims 10 to 13, characterized in that the interconnected paper layers (12, 13) are pulled off in the transport direction (T) of the package (11) before a package (11) is inserted between the paper layers. Method according to one of Claims 10 to 14, characterized in that the joining of the paper layers (12, 13) and the folding or rolling of the side edges of the paper layers (12, 13) takes place at at least approximately half the height of the package (11). Method according to one of Claims 10 to 15, characterized in that the side edges of the paper layers (12, 13) are each laid flat on top of one another before they are rolled up, folded or tucked in together.

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