DE102022112633A1 - Packaging machine and method for packaging objects in a paper packaging - Google Patents

Abstract

The invention relates to a packaging machine (10) for packaging objects (13) in a paper packaging with a transport device (12) which transports the objects (13) to be packaged one after the other in a transport direction (14) in the area of a deflection device (16) for deflecting a Paper web is inserted between the halves of the folded paper web, a paper web feed arrangement (18) being provided which feeds the paper web to the deflection device (16) at an angle not equal to 90° to the transport direction (14).

Description

The invention relates to a packaging machine for packaging objects in a paper packaging with a transport device which introduces the objects to be packaged one after the other in a transport direction in the area of a deflection device for deflecting a paper web between the halves of the folded paper web. The invention also relates to a method for packaging objects in paper packaging.

Film packaging machines for packaging objects in film packaging are known. For example, the reveals DE 20 2013 101 880 U1 a film packaging machine for objects of different heights with a transport device that successively introduces the objects to be packaged between the halves of a film web. Foil is a relatively easy material to handle. In particular, films are stretchable, which simplifies processing in packaging machines.

However, there is a need to replace film packaging with paper packaging. Paper is a different material and much more difficult to handle. In particular, with paper there is a risk that paper will tear or unwanted wrinkles will form.

The object of the present invention is therefore to provide a packaging machine with which objects can be packaged without the paper web tearing.

This object is achieved according to the invention by a packaging machine for packaging objects in a paper packaging with a transport device which introduces the objects to be packaged one after the other in a transport direction in the area of a deflection device for deflecting a paper web between the halves of the folded paper web, a paper web feed arrangement being provided, which feeds the paper web to the deflection device at an angle other than 90° to the transport direction.

In the known film packaging machine, the film is fed to the deflection device in a film transport direction which runs at right angles to the transport direction of the transport device. It has been shown that this can lead to tearing of the paper web in a packaging machine that processes a paper web instead of film. Tearing of the paper web can be avoided if the paper web is fed to the transport device at an angle to the transport direction that is not equal to 90°, in particular is an obtuse angle.

According to one embodiment of the invention, it can be provided that the paper web feeding arrangement has a guide element over which the folded paper web is guided, the guide element having an angle > 0° to the transport direction of the transport device, in particular to the horizontal. For example, the guide element can be designed as a rod or roller that is aligned obliquely to the horizontal. When the paper web is guided over this guide element, one side of the folded paper web must travel a longer distance than another side, so that the paper web is fed to the deflection device at an angle. This prevents the paper web from tearing when the paper web is deflected.

Particular advantages arise if the angle to the transport direction, especially to the horizontal, is adjustable. For example, the guide element can be pivotally mounted at one end and the other end can be adjustable in height. This means that an optimal setting can be found and the packaging machine can also be adapted to different types of paper and paper qualities.

The paper web feeding arrangement can have a stop and shape bar for each paper web half. The length of the holding and shaping rod can correspond to approximately half the width of the paper web. The holding and shaping rods allow the halves of the paper web to be moved apart so that they can be deflected separately from each other and objects can be inserted between the paper web halves.

The deflection device can have two deflection triangles, in particular one deflection triangle for each half of the paper web. The deflection triangles can be completely flat. In order to prevent the paper web from tearing, the sides of the deflection triangles facing away from the paper web feed arrangement, around which a paper web half is deflected, can have an angle <45°, in particular an angle in the range 35° - 43°, preferably 40°, to the transport direction 14. Furthermore, it is conceivable that the deflection triangles have a guide element at one corner that prevents the paper web from tearing. The guide elements can be made of plastic. They can be rounded.

In order to connect the paper web halves together in a longitudinal direction of the packaging and thereby enclose the object in the paper web, a longitudinal connection device can be used be provided for connecting the paper web halves. The longitudinal connecting device can be a gluing or adhesive device.

According to one embodiment, it can be provided that the longitudinal connection device comprises a heating device. This is particularly advantageous if a sealable paper web is used. A sealable paper is, for example, a so-called 95/5 paper, i.e. H. a paper that has up to 5% foreign content. Such foreign parts can be plastic parts, for example. The heating device, for example a sealing wedge, can press the two paper web halves together under the influence of heat, whereby the paper web halves are fused and thus connected in the area of the heating device. Depending on the thickness of the paper, it may be sufficient if the heat is applied on one side. For thicker paper, heat can be applied on both sides.

For example, a heatable welding or sealing tool can be provided above the paper web, which interacts with a support. A belt is conceivable as a support.

The sealing tool, in particular a sealing wedge, can seal the long side of the packaging while, for example, driven belts pull the paper web through the longitudinal connecting device. The sealing tool should be spaced/pulled up when stationary to prevent the paper from burning.

A longitudinal separating device can be provided which separates excess paper web material, so that paper packaging is created that is easy to handle and ship. The longitudinal cutting device can have a blade, a cutting roller or the like.

Furthermore, the packaging machine can have a cross-connection and separation device. This means that the packaging can be closed at the front and back and separated from each other. The cross-connecting and separating device can have a U-shaped connector, which prevents the paper web from tearing in the area of the cross-connecting and separating device when the paper web is pulled through the machine by the longitudinal connecting device.

Furthermore, a residual strip winding arrangement with an upstream deflection device can be provided. A rod triangle, for example, can be provided as a deflection device. The remaining strip, which is separated by the longitudinal separating device, can be deflected flat by the deflection device. A flat winding can then take place. This is necessary because paper cannot be crushed. The residual strip winding arrangement can have a longitudinally slotted cylinder which can be compressed for removal from the residual strip winding arrangement.

The paper can be fed to the packaging machine via a paper roll unwinding device, the paper roll unwinding device being equipped with a rotatably mounted shaft on which the paper roll is arranged. With plastic film, it is possible to place the entire bale of plastic film on two rolls and unroll it from there. This is not possible with a paper roll as paper jams can occur between the rolls. Therefore, according to the invention it is provided to provide a paper roll unwinding device with a rotatably mounted shaft. The paper roll unwinding device can have a brake to prevent the paper web from unrolling in an uncontrolled manner and so that the paper web can be kept under tension.

In principle, it is conceivable to feed an already folded paper web from the roll to the packaging machine. However, if a roll with a folded paper web is not available, a folding station can be provided for folding a paper web in half, with an expanding element being provided which pushes the two paper web halves apart from each other after folding. The spreading element can, for example, be designed as a rod which projects between the paper web halves of the folded paper web. This measure can prevent the formation of transverse folds in the longitudinally folded paper web and ensure that the folded paper web is reliably fed to the deflection device. Uncontrolled wrinkling hinders the redirection of the paper web. The paper web can be folded in half using a deflection triangle.

The scope of the invention also includes a method for packaging an object with paper packaging, with which a first and a second half of a paper web are folded over and objects to be packaged are introduced between the folded paper web halves, the folding taking place in a deflection device, whereby a Obtuse angle is set between the paper web section entering the deflection device and the paper web section leaving the deflection device. As described above, this can ensure that the paper web does not tear in the deflection device and does not form unwanted wrinkles.

Particular advantages arise when a sealable paper, in particular a paper with a foreign content, e.g. B. with a plastic content is used. It can be a coated paper. The paper web halves can then be connected to one another using a heating device, for example a sealing wedge. An additional adhesive application or gluing device is not necessary.

1. a. Bereitstellen einer auf die Hälfte gefalteten Papierbahn,
2. b. Umlenken der gefalteten Papierbahn, indem die Hälften der Papierbahn umgeschlagen werden,
3. c. Verbinden der Papierbahnhälften zur Bildung eines ersten querseitigen Verpackungsrands,
4. d. Verbinden der Papierbahnhälften zur Bildung eines längsseitigen Verpackungsrands,
5. e. Verbinden der Papierbahnhälften zur Bildung eines zweiten querseitigen Verpackungsrands.

The scope of the invention also includes a method for producing paper packaging, in particular with a packaging machine according to the invention, with the method steps

1. a. Providing a sheet of paper folded in half,
2. b. Redirecting the folded paper web by folding over the halves of the paper web,
3. c. Connecting the paper web halves to form a first transverse packaging edge,
4. d. Connecting the paper web halves to form a longitudinal packaging edge,
5. e. Connecting the paper web halves to form a second transverse packaging edge.

Because a folded paper web or half-tube is used, the paper web halves only have to be connected on three sides of the packaging in order to produce a packaging that is closed on all sides. The size of the packaging can be adjusted to suit the item being packaged.

If the paper web halves are laid flat on top of each other to form the packaging edges and are thus connected, no folds need to be carried out to form the packaging edges.

In particular, if sealable paper is used, the edges of the packaging can be sealed under the influence of heat. There is no need for adhesive or glue.

Before the longitudinal packaging edge is formed, an object to be packaged can be inserted between the paper web halves. The packaging can thus be made around the item to be packaged. This makes automated packaging of items possible.

Further features and advantages of the invention result from the following detailed description of exemplary embodiments of the invention, based on the figures of the drawing, which show details essential to the invention, and from the claims. The features shown there are not necessarily to be understood to scale and are presented in such a way that the special features according to the invention can be made clearly visible.

The various features can be implemented individually or in groups in any combination in variants of the invention.

Exemplary embodiments of the invention are shown in the schematic drawing and explained in more detail in the following description.

• 1 eine schematische Ansicht einer Verpackungsmaschine;
• 2 eine Detailansicht einer Papierzuführanordnung;
• 3 eine vergrößerte Ansicht einer Spreizeinrichtung;
• 4 eine Querverbindungs- und Trenneinrichtung;
• 5 eine Längsverbindungseinrichtung.

Show it:

• 1 a schematic view of a packaging machine;
• 2 a detailed view of a paper feed arrangement;
• 3 an enlarged view of a spreader;
• 4 a cross-connection and disconnection device;
• 5 a longitudinal connection device.

The 1 shows a packaging machine 10 with a transport device 12, which introduces objects 13 to be packaged one after the other in a transport direction 14 in the area of a deflection device 16 for deflecting a paper web between the halves of a folded paper web 17 (also called half-tubular web).

The folded paper web 17 is fed to the deflection device 16 by a paper web feed arrangement 18. The paper web feed arrangement 18 has a guide element 20 over which the folded paper web 17 is guided. The guide element 20 is pivotally mounted at one end 22 and is mounted in a height-adjustable manner at the opposite end 24. The guide element 20 can thus be set at an angle >0° to the transport direction 14 or to the horizontal. This results in one edge 17.1 of the folded paper web 17 traveling a longer distance than the opposite edge 17.2, as a result of which the folded paper web 17 is not fed to the deflection device 16 perpendicular to the transport direction 14, but at an obtuse angle to the transport direction 14.

In the exemplary embodiment shown, the end 24 of the guide element 20 is adjusted upwards, i.e. has a higher position than the end 22. The end 24 could also be arranged lower than the end 22 or shifted to the right, i.e. away from the deflection device 16 be. All possibilities lead to a wrong outcome ted paper web 17, which is guided over the guide element 20, is not fed vertically to the deflection device 16. Even if the guide element 20 is deflected downward and the folded paper web 17 runs along the underside of the guide element 20, the folded paper web 17 is guided “over” the guide element 20.

The paper web feed arrangement 18 also has a stop bar 26, 28 for each paper web half, see illustration 2 . In the exemplary embodiment, the holding rods 26, 28 are aligned horizontally and parallel to the transport direction 14. Furthermore, there is a spreading device 27 (see also 3 ) is provided, which is designed as a triangular rod in order to be able to feed the paper web halves separately to the deflection device 16.

The paper web halves are deflected in the deflection device 16 by deflection triangles 30, 31. At least one of the deflection triangles 30, 31 can be height-adjustable. For example, the lower deflection triangle 31 can be rigidly mounted under a conveyor belt of the transport device 12. The upper deflection triangle 30 can be adjustable in height. The spreading device 27 can also be height-adjustable and can preferably be positioned halfway between the deflection triangles 30, 31. This means that geometrically correct deflection can always be guaranteed and the packaging can be closely adapted to the packaged goods. The deflection triangles 30, 31 are completely flat in the exemplary embodiment shown. In order to prevent the paper web 17 from tearing, the sides 30.2, 31.2 of the deflection triangles 30, 31 facing away from the paper web feed arrangement 18, around which a paper web half is deflected, have an angle <45°, in particular an angle in the range 35° - 43°, preferably of 40° to the transport direction 14. The side 30.1 facing the paper web feed arrangement 18 can be aligned parallel to the transport direction 14. The angle of <45° is then also between the sides 30.1 and 30.2 of a deflection triangle 30. The same applies to the deflection triangle 31. The angle depends on the angle at which the folded paper web is fed to the deflection device 16. A deflection of the folded paper web by 90° should be avoided. The deflection angle should be greater than 90°.

The packaging machine 10 also has a cross-connection and separation device 32 (see also 4 ), through which the paper web halves can be connected to one another and the paper web can also be severed.

Furthermore, a longitudinal connecting device 34 is provided, through which a paper packaging 37 can be closed on one long side. Furthermore, a remaining strip 35 can be separated in the area of the longitudinal connecting device 34. The separated remaining strip 35 is deflected via a deflection device 36 and fed to a remaining strip winding arrangement 38 and wound up there.

If there is no rolled-up folded paper web, the paper web 39 can be rolled up unfolded. Such a paper roll 42 can be rotatably mounted on a shaft 40. The paper web 39 can be fed from the paper roll 42 to a folding device 44, where the paper web 39 is folded in half. A spreading element 46 projects between the paper web halves in order to space them from one another. This can prevent the formation of transverse folds and tearing of the folded paper web 17.

The folded paper web 17 can be pulled off by a take-off device 48. The trigger device 48 can have driven rollers 50, 52.

Additional deflection rollers, which are longer than half the width of the paper web, can also be provided in the packaging machine 10 in order to transport the folded paper web 17 as gently as possible and only deflect it at obtuse angles in order to prevent the paper web from tearing and the formation of wrinkles. Furthermore, a memory can be provided so that paper does not have to be removed from the paper roll every time the machine is cycled.

In addition to the elements already described, the 2 that the paper web feed arrangement 18 in the area of the guide element 20, in the exemplary embodiment shown below the guide element 20, has two guide elements 54, 56, which are designed as rods. The folded paper web 17 is thus first deflected by the guide element 54 and guided to the guide element 20, where the folded paper web 17 is deflected. The folded paper web 17 is then guided downwards and then along the underside of the guide element 56. The folded paper web 17 then passes between two rollers 58, 60, which are not driven in the exemplary embodiment shown. The rollers 58, 60 ensure that the folded paper web 17 is reliably fed to the spreading device 27.

The spreading device 27 is in the 3 presented in detail. A sword section 62 is arranged on a rod section 62 and tapers towards its free end 66. The sword section 64 allows the paper web halves to separate from one another which are spaced apart so that they can be fed separately to the deflection device 16 and thus to the two deflection triangles 30, 31.

The 4 shows a detailed representation of the cross-connection and separation device 32. In the exemplary embodiment shown, the cross-connection and separation device 32 has a non-heated lower punch 68 with two welding supports 70, 72 spaced apart from one another. Welding pads can have foam on their top.

The welding pads 70, 72 are connected to one another by a U-shaped connector 74. A cutting knife 76 can be moved in the space between the welding supports 70, 72. In particular, the cutting knife 76 is vertically movable.

Furthermore, the cross-connection and separation device 32 has an upper punch 78 which is heated. The upper stamp 78 has welding strips 80, 82 corresponding to the welding supports 70, 72. The welding strips 80, 82 are also spaced apart and connected to one another by a U-shaped connector 84, which is also heated. The U-shaped connector can be heated by the welding bars 80, 82 or separately. This creates a sealed seam that consists of two straight lines connected by a U. The U-shaped section of the sealing seam prevents the paper web from tearing when it is pulled through the packaging machine 10 by means of the longitudinal connecting device 34.

The lower punch 68 and the upper punch 78 are movable relative to one another, so that the upper punch 78 and the lower punch 68 can be pressed together with the folded paper web 17 running between them. The two halves of the folded paper web 17 are connected to one another at two points, namely in the area between the welding support 72 and the welding bar 80 and between the welding support 70 and the welding bar 82. The rear side of a first package 37 is thus closed and the front side of a subsequent package 37. The packages 37 can be separated from one another by separating the folded paper web 17 between the welding pads 70, 72 by the separating knife 76.

In the 5 In addition to the elements already described, the longitudinal connecting device 34 can be seen in more detail. The longitudinal connecting device 34 has a driven belt 86 which pulls the folded paper web 17 through the packaging machine 10. By means of a heating device 88 designed as a sealing wedge, the paper web halves are pressed together along the long side of a paper packaging 37 and fused together. The remaining strip 35, which is wound up on the remaining strip winding arrangement 38, is separated by a longitudinal separating device 90 designed as a separating wedge.

The remaining strip winding arrangement 38 is also driven and has a slotted sleeve 92 with which the wound remaining strip 35 can be removed.

The longitudinal connection device 34 and the cross-connection and separation device 32 can be height-adjustable so that they can always be positioned so that the longitudinal connection and cross-connection of the paper layer halves takes place approximately halfway up the object to be packaged.

The paper packaging 37 is transported to the cross-connecting and separating device 32 by a transport device 94 designed as a conveyor belt.

QUOTES INCLUDED IN THE DESCRIPTION

This list of documents listed by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 202013101880 U1 [0002]

Claims (19)

Packaging machine (10) for packaging objects (13) in a paper packaging with a transport device (12) which transports the objects (13) to be packaged one after the other in a transport direction (14) in the area of a deflection device (16) for diverting a paper web between the halves the folded paper web (17), characterized by a paper web feed arrangement (18) which feeds the folded paper web (17) to the deflection device (16) at an angle not equal to 90 ° to the transport direction (14). packaging machine Claim 1 , characterized in that the paper web feed arrangement (18) has a guide element (20) over which the folded paper web (17) is guided, the guide element (20) having an angle > 0° to the transport direction (14) of the transport device (12), especially to the horizontal. packaging machine Claim 2 , characterized in that the angle to the transport direction (14), in particular to the horizontal, is adjustable. Packaging machine according to one of the preceding claims, characterized in that the paper web feeding arrangement (18) has a stop bar (26, 28) for each paper web half. Packaging machine according to one of the preceding claims, characterized in that the deflection device (16) has two deflection triangles (30, 31), the deflection triangles (30, 31) having guide elements at one corner which prevent the paper web (17) from tearing. Packaging machine according to one of the preceding claims, characterized in that a longitudinal connecting device (34) is provided for connecting the paper web halves. packaging machine Claim 6 , characterized in that the longitudinal connecting device (34) comprises a heating device (88). Packaging machine according to one of the preceding claims, characterized in that a longitudinal separating device (90) is provided. Packaging machine according to one of the preceding claims, characterized in that a cross-connecting and separating device (32) is provided. Packaging machine according to one of the preceding claims, characterized in that the cross-connecting and separating device (32) has a U-shaped connector (74, 84). Packaging machine according to one of the preceding claims, characterized in that a residual strip winding arrangement (38) with an upstream deflection device (36) is provided. Packaging machine according to one of the preceding claims, characterized in that a paper roll unwinding device with a rotatably mounted shaft (40) on which the paper roll (42) is arranged is provided. Packaging machine according to one of the preceding claims, characterized in that a folding station (44) is provided for folding a paper web (39) in half, with an expanding element (46) being provided which separates the two paper web halves after folding. Method for packaging an object (13) with paper packaging, in which a first and a second half of a paper web are folded over and objects (13) to be packaged are introduced between the folded paper web halves, the folding taking place in a deflection device (16), whereby an obtuse angle is set between the paper web section entering the deflection device (16) and the paper web section leaving the deflection device (16). Method according to one of the preceding claims, characterized in that a sealable paper is used. Process for producing a paper packaging with the process steps a. Providing a paper web (17) folded in half, b. Redirecting the folded paper web (17) by folding over the halves of the paper web, c. Connecting the paper web halves to form a first transverse packaging edge, d. Connecting the paper web halves to form a longitudinal packaging edge, e. Connecting the paper web halves to form a second transverse packaging edge. Procedure according to Claim 16 , characterized in that the paper web halves are placed flat on top of each other to form the packaging edges. Procedure according to one of the Claims 16 or 17 , characterized in that the packaging edges are sealed under the influence of heat. Method according to one of the preceding Claims 16 until 18 , characterized in that before the longitudinal packaging edge is formed, an object to be packaged is inserted between the paper web halves.

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