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EP-4735241-A1 - METHOD AND SYSTEM FOR MANUFACTURING CONTAINERS BASED ON SPIRAL TUBES

EP4735241A1EP 4735241 A1EP4735241 A1EP 4735241A1EP-4735241-A1

Abstract

The invention relates to a method and to a system for manufacturing containers based on spiral tubes for a wide variety of spiral tubes. The task is to create a method and a universal system for manufacturing containers based on spiral tubes, which method can be used to manufacture all possible types of spiral tubes economically and in an energy-optimised manner within a complex system, requires little space for installation of the system, and operates fully automatically. The method according to the invention is applicable to a wide variety of web materials. Said web materials are supplied from a feeding web supply station (1) with narrow rolls (1.1) mounted therein which are loaded with the web materials that are to be processed. The winding station (3) consists of the winding mandrel (3.1) and a winding belt (3.3) that presses the webs onto the winding mandrel (3.1). The winding mandrel (3.1) is driven by means of a winding mandrel drive (3.2). The individual pre-glued narrow roll webs (1.2) are wound obliquely, overlapping and under uniform web tension onto the winding mandrel (3.1). A continuously moving linear motion of the endless spiral tube (3.4) is produced. During the linear motion, glued labels (4.3) are applied by means of one or more sheet feeders (4.2) of a defined size in a labelling station (4) integrated into the system. In order to ensure that the endless spiral tube (3.4) can be cut precisely at the intended points with uniform cutting edges that do not require reworking, it is necessary to synchronise the linear motion of the endless spiral tube (3.4), the labelling station (4), and the cutting station (5) in such a way that the spiral tubes (9) can be cut into individual tubes in the cutting station (5) exactly to the size of the applied label (4.3). For monitoring purposes, it is advisable to distribute one position-detection sensor (8) or a plurality of position-detection sensors (8) here.

Inventors

  • Grunert, Jochen
  • ARNOLD, RALF
  • LIPPERT, FRANK

Assignees

  • Oecopac Grunert Verpackungen GmbH

Dates

Publication Date
20260506
Application Date
20240626

Claims (6)

  1. 1. Method for producing containers based on spiral sleeves made of paper, cardboard and/or film webs fed from a feeding web supply station (1) with narrow rolls (1.1) suspended therein, with web brakes (1.3) and a winding mandrel (3.1) in a winding station (3), wherein the suspended narrow rolls (1.1) are glued via individual gluing units (2.1) and the glued narrow roller webs (1.2) are fed to a winding mandrel (3.1) in an overlapping manner at a defined, predeterminable angle, wherein the resulting glued narrow roller webs (1.2) are pressed and driven onto the winding mandrel 3.1 with a winding belt (3.3), so that a glued endless spiral tube (3.4) is created, characterized in that each of the supplied narrow roller conveyors (1.2) which are fed to the winding station (3) is individually monitored and controlled electronically so that a uniform web tension is generated at and with the web brakes (1.3), the winding mandrel (3.1) is driven by means of a winding mandrel drive (3.2) so that it rotates evenly, whereby the incoming narrow roller conveyors (1.2) are stabilized and connected by means of a winding belt (3.3) and floating of the formed wound endless spiral tube (3.4) on the winding mandrel (3.1) is prevented, a continuous linear movement is generated and during the linear movement by means of a roller gluing device (4.1) glued labels (4.3) are applied in an integrated labeling station (4) by means of a sheet feeder (4.2) of a defined size, or self-adhesive labels (4.3) are applied, and then the endless spiral tube (3.4) are cut during the linear movement into individual sleeves (9) of defined length in an integrated cutting station (5) exactly the size of the applied label.
  2. 2. Universal system for the production of containers based on spiral sleeves made of paper, cardboard and/or film webs with a web supply station (1), individual gluing units (2.1) and a winding station (3) with a winding mandrel (3.1) and an electronic control and regulation, characterized in that that in a single continuous operating system - a railway supply station (1) with suspended narrow rollers (1.1), - a gluing station (2) consisting of individual gluing units (2.1) for the continuous gluing of the narrow roller conveyors (1.2), - a winding station (3) which produces an endless spiral tube (3.4) by means of a pressable winding belt (3.3) on a central rotating winding mandrel (3.1) driven by a winding mandrel drive (3.2), - a continuously linearly controlled labelling station (4), consisting of one or more roller gluing devices (4.1) and one or more sheet feeders (4.2), - a cutting station (5) consisting of one or more cutting devices (5.1) and one or more position detection sensors (8) are arranged, - wherein the endless spiral tube (3.4) is continuously guided on one and the same rotating winding mandrel (3.1) on a single winding axis (3.5).
  3. 3. Universal plant for the production of containers on the basis of spiral sleeves according to claim 2, characterized in that a forming station (7) for the formation of any cross-section is arranged in the plant.
  4. 4. Universal system for producing containers based on spiral sleeves according to claim 2 or 3, characterized in that a window cutting station (6) is integrated in the system, the window cutting station (6) is arranged at a defined position at the end of the winding mandrel (3.1), wherein one or more openings (10) corresponding to the window cutting station (6) can be formed in the winding mandrel (3.1), or the window cutting station (6) is arranged in such a way that it only engages after the end of the winding mandrel (3.1), and at the opened point or points or after the end of the winding mandrel (3.1) a laser cutting device (6.1) or a Water jet cutting device (6.2) is arranged, the working head (14) of which forms a predeterminable cutting path movement so that windows of any shape can be formed.
  5. 5. Universal system for producing containers based on spiral sleeves according to claim 2 or 3, characterized in that after the cutting station (5) the cut-to-length individual sleeve (9) is directly received or temporarily stored, a window cutting station (6) is arranged immediately downstream, a laser cutting device (6.1) or a water jet cutting device (6.2) is formed in the window cutting station (6), which forms one or more windows of any shape in the cut-to-length individual sleeve (9).
  6. 6. Method for producing containers based on spiral sleeves in a system according to claim 5, characterized in that a cut-to-length individual sleeve (9) is centered on one side, separately tensioned and positioned, then a laser cutting device (6.1) is brought into engagement, an absorption device (6.1.2) is introduced inside the winding mandrel (3.1), then the cut-to-length individual sleeve (9) is moved in a defined linear manner and at the same time rotated relative to a laser cutting head (6.1.1), so that one or more windows are cut out and formed in the cut-to-length individual sleeve (9), with suction taking place at the same time.

Description

Process and plant for the production of containers based on spiral sleeves The invention relates to a method and a plant for producing containers based on spiral sleeves for various types of spiral sleeves, which are wound and produced from paper webs according to the preambles of the independent claims. Generic tubes made of paper or cardboard webs, which are produced by winding flat materials using a winding mandrel, have been known for a long time. A basic distinction is made between two different types, namely those which are wound parallel, which means that the paper is wound onto a mandrel perpendicular to a winding axis and the individual layers are glued together; and those paper tubes in which the paper strip(s) are wound onto a winding mandrel at an angle to the winding axis, whereby the oblique winding creates a tube of any length, which is referred to as a spiral tube. Due to these advantages, such as greater rigidity and greater production speed, these endless spiral tubes have become established in production. The production speed of the endless spiral tube is determined by the pitch of the individual obliquely wound paper strips and the resulting constant forward thrust. A significantly larger amount of spiral tube can therefore be produced per unit of time using a single winding system. The endless spiral sleeve produced in this way is cut to length in a cutting system itself, so that individual spiral sleeves of a specific length are created, which are then placed in a buffer storage. These individual sleeves are then picked up again in a separate system and coated with a parallel label in a separate labeling machine. The labeled individual sleeve is then cut to the required final size, which creates a not insignificant amount of waste. In addition, the effort required to produce containers based on spiral sleeves is relatively high. As an example of how to produce a stable spiral sleeve, the technical solution according to US 3,194,275 Al is mentioned here. This paper spiral sleeve consists of a large number of individual fibrous paper strips, which are formed into a stable spiral sleeve by means of adhesive in the overlapping area in a spiral shape. These paper strips are only wound at a winding angle of approximately 15 - 25 degrees, i.e. with a relatively low pitch angle, which is restrictive and disadvantageous overall. DE 2012 109 279 A1 describes a method and a device for producing sleeves, where strip-shaped web material is continuously applied with adhesive in the overlapping area using a suitable application head. It is also possible to apply two different adhesives in order to achieve better bonding of the paper webs. In order to speed up the bonding, it is also possible to use heat-applied adhesives, which then develop their full adhesive strength relatively quickly when they cool down. The result is an endless spiral sleeve, which then has to be cut to a specified length. DE 2 649 658 A1 describes a can made of spirally arranged fiber material for food and a method for manufacturing it with a diagonally running label, which has a collar cut, whereby the fiber material body of the can is not cut and the can can be opened reliably without the label tearing irregularly. A dividing line is created from one end of the can to the other end during can manufacturing, which is covered by the label and is thus secured against unattended opening. By being able to pull the label off diagonally by hand, the actual dividing line opens and the contents of the can can be removed without any problem. This solution is only suitable for a few applications. EP 1 0557 733 A1 describes a method for producing multi-layer tubular containers with a window to view the product contained therein. First, an inner lining layer is wound on a mandrel to create a tubular shape, the lining layer being made of a polymer material with low opacity. After winding, the lining layer is further displaced on a forming mandrel and then a spiral sleeve layer that can be wound at an angle is applied. A reference mark is printed on a label layer, which is used to cut out openings from the label layer at predetermined locations along the length of the can. When the actual spiral sleeve is wound around the previously wound lining layer on the mandrel and the label layer is then wound onto the previously wound spiral sleeve on the same mandrel, the openings in the label layer are aligned with the openings in the spiral sleeve in order to be able to produce a tubular shape with a viewing window through the corresponding openings and onto the lining layer. DE 27 25 116 A1 describes a method and a device for spiral labeling of spiral sleeves, whereby a continuous label strip is also wound diagonally onto a helically wound spiral tube. In order to achieve the required correspondence between the individual label sections and the interfaces created by a cutting device, the conveying speed of the rotating spiral tube is determined