EP1927545A1 - Packaging apparatus and method for fixing exterior end covers to a reel - Google Patents

Abstract

The device has a package pressing plate (13) supported on a sledge and movable in a longitudinal direction of a roller bearing device, and a package pressing drive. The plate is designed as a hollow body (14), which is partially filled with a heat carrier (15) e.g. mineral oil or synthetic oil. A regulatable and/or controllable heating device (16) is provided in the hollow body for occasional evaporation of the heat carrier, where the carrier is condensed at the inner side. A front side (21) of the plate is heated. An independent claim is also included for a method for fastening external front covers to a roll stored in a roller bearing mechanism.

Description

The invention relates to a packaging device for attaching outer end caps to a roller with a roller bearing device, at least one movable in the longitudinal direction of the roller bearing device and mounted on a carriage and a pack press drive acting on the carriage pack press drive. Such a packaging device is generally also referred to as "packing press" in short.

Furthermore, the invention relates to a method for attaching outer end covers to a roller mounted in a roller bearing means by means of at least one movable in the longitudinal direction of the roller bearing device and mounted on a carriage pack press plate and acting on the carriage pack press drive.

The invention will be described below with reference to a roll of paper to be packaged, but without being limited thereto. It is also applicable to comparable rolls that are packed in a similar way.

In one of the last manufacturing steps, paper webs, after being cut to the correct width, are wound up into paper rolls. They must be packed before being transported to a consumer. For this purpose, usually a so-called inner end cover is attached to the front sides of the paper roll in each case. Thereafter, the circumference of the paper roll is wrapped with a packaging web, which usually protrudes slightly beyond the end faces. This supernatant is when wrapping or later on the front pages taken. Thereafter, an outer end cover is glued to each end face. For this purpose one often uses outer end caps which are provided with a heat-activatable adhesive, a so-called hot-melt adhesive. The outer end covers are placed with their adhesive-free point on a packing press plate, which is also referred to as a press plate, and held there, for example by means of vacuum. The packing press plate is heated, the heat penetrates the outer end cover and makes the adhesive sticky. At the same time or offset in time the packing press plate presses the outer end cover with a very high pressure, for example in the range of 3.5 to 4 tons, against the end face of the paper roll and thus glued the outer end cover with the inner end cover and the folded supernatants of the packaging web. If so the outer end cover has been glued to the front side of the paper roll, as after a certain residence time, the packing press plate is moved back.

This approach, for example, in the German patent application DE 40 34 395 A1 has been proven, has basically proven. It produces relatively sturdy packaging that adequately protects the paper rolls. However, this type of packaging is time consuming and energy consuming. Because you have to heat not only the outer end cover, but by means of sunk electrical heating elements the entire, possibly from several segments to be heated existing Packpressenplatte, which takes a certain amount of time and relatively much energy needed. In addition, this type of heating often does not ensure a uniform heat distribution in the packing press plate and the temperature transmitted by possible temperature sensors to the control / regulation often does not correspond to the actual temperatures on the packing press plate.

Furthermore, it is also known to heat an outer end cover on its side provided with the heat-activatable adhesive side with a heater. Here, the already applied to the packing press plate outer end cover with a movable over the surface of the packing press plate Heating device to be heated, as for example, from the European patent application EP 1 110 864 A1 is known. However, the outer end cover can be heated on its way between a receiving position in which the outer end cover is picked up by a gripping device, and a position in front of the end side of the roller from its adhesive side contactless, as for example from German patent DE 100 25 510 C2 is known. Both options allow a further reduction in energy consumption, but each require at least one other device for heating the outer end cover, which can be very complex in their construction and their control / regulation depending on the system configuration.

It is the object of the invention to develop a packaging device of the type mentioned in such a way that the packing press plate can be heated faster, easier and more uniform at a reduced power consumption. Furthermore, a corresponding method should be specified.

This object is achieved in a packaging device of the aforementioned type according to the invention that the packing press plate is at least partially formed as at least a hollow body which is at least partially filled with at least one heat carrier, and that at least one preferably controllable / controllable heater for at least temporary evaporation the at least one heat carrier is provided in the at least one hollow body, wherein the at least one at least temporarily evaporated heat transfer medium condenses on the inside of the at least one hollow body and thereby heats at least the front of the packing press plate.

The object of the invention is completely solved in this way.

The packing press plate can thus be heated very accurately and very quickly with a significantly improved heating uniformity. Further reduced the energy consumption in view of the improved uniformity of heating noticeable and also the system is due to the inventive design better controllable / regulated.

The packing press plate is formed in a preferred embodiment as a single hollow body with a hollow body volume and thus forms a closed heat cycle. On the one hand this simplifies the control of the system, on the other hand the heating uniformity improves again.

From an economic and operational point of view, the heat transfer medium preferably comprises water, air and / or a thermal oil, in particular a mineral oil, a synthetic oil or a biological oil. The synthetic oil may be, for example, a silicone oil, the biological oil a citrus oil such as D-Limone. The exemplified heat transfer media are all characterized by a suitable specific heat capacity, a good to very good heat transfer coefficient and an acceptable thermal conductivity.

In a preferred practical embodiment, the heating device comprises at least one heating coil having at least one coil, which converts an electrical current into heat and radiation energy through its ohmic resistance. In this case, the heating coil can be self-supporting or wound around a heat-resistant core, which preferably consists of tungsten. In general, any electrical component can be used by which electrical current is converted into heat and radiation energy.

In order for the energy conversion to take place quickly and efficiently, the heating device is preferably arranged in the lower region of the hollow body, which is at least temporarily filled with the heat carrier. The arrangement is carried out in a favorable manner such that a uniform heating of the heat carrier is possible.

Furthermore, at least one heat exchanger can be arranged in the region of the heating device.

Also, the packing press plate is provided in an advantageous embodiment with a preferably centrally acting suction device, by means of which a negative pressure is generated at its front, with which the outer end cover is held on the packing press plate until it sticks to the roller at the end of the pressing process. This increases the efficiency of the packaging process with a reduced time requirement and improved runability.

This object of the invention is achieved according to the invention in a method of the type mentioned that the at least partially formed as at least one hollow body and at least partially filled with at least one heat transfer pack press plate is heated by at least one preferably controllable / controllable heater, wherein the at least one heat carrier in which at least one hollow body is at least temporarily vaporized by means of the at least one preferably controllable / controllable heating device, condenses on the inside of the at least one hollow body and thereby heats at least the front side of the packed press plate.

The object of the invention is again completely solved in this way and it results in the aforementioned advantages of the invention.

Further features and advantages of the invention will become apparent from the following description of preferred embodiments with reference to the drawings.

Figur 1

eine schematische Seitenansicht einer Verpackungsvorrichtung;

Figur 2

eine teilweise Vorderansicht der Packpressenplatte der Figur 1; und

Figur 3

eine Seitenansicht der Packpressenplatte der Figur 2.

Show it

FIG. 1

a schematic side view of a packaging device;

FIG. 2

a partial front view of the packing press plate of FIG. 1 ; and

FIG. 3

a side view of the packing press plate of FIG. 2 ,

The FIG. 1 shows a packaging device 1 for attaching outer end caps 3 to a roller 2, for example a paper roll, which rests on support rollers 5, which form a roller bearing device 4 for the roller 2. The longitudinal extension of the roller carpet forming a roller 5 defines the longitudinal extent of the roller bearing means 4. For clarity, only the left part of the packaging device 1 is provided with the corresponding reference numerals.

The support rollers 5 are arranged on a profile frame 6 which extends in the longitudinal direction. On the profile frame 6, a carriage 7 with rollers 8 is movable. The carriage 7 is in this case driven by a chain 9 or a toothed belt, wherein the chain 9 in turn is driven via a gear 10 by an electric motor 11. Chain 9, gear 10 and electric motor 11 form a pressure-free pack press drive 12, with which you can move the carriage 7 back and forth (double arrow D) can. Of course, the carriage 7 may also be driven by means of a hydraulic device.

On the roller 2 side facing the carriage 7 a Packpressenplatte 13 is provided.

The FIG. 2 now shows a partial front view of the packing press plate 13 of FIG. 1 ,

The packing press plate 13 is at least partially, in the representation of FIG. 2 even completely formed as a hollow body 14 which is at least partially filled with a heat carrier 15. The hollow body 14 forming the packing press plate 13 is formed with a hollow body volume V14, and the heat carrier 15 may comprise water, air and / or a thermal oil, in particular a mineral oil, a synthetic oil or a biological oil.

Furthermore, a preferably controllable / heating device 16 for at least Temporary evaporation of the heat carrier 15 in the packing press plate 13 forming hollow body 14 is provided. The heating device 16 shown comprises a heating coil 17, which has at least one coil and converts an electrical current into heat and radiation energy through its ohmic resistance. The heating coil 17 is cantilevered, but it may also be wound around a heat-resistant core, which preferably consists of tungsten, and it is in the lower region 18 of the hollow body 14 which is at least temporarily filled with the heat transfer medium 15, respectively. The control / regulation of the heater 16 is known in the art and therefore only schematically indicated by the reference numeral "19".

The hollow body 14 may have a corresponding inner contour including associated internals in a manner which is obvious to the person skilled in the art in order to allow optimum condensation of the at least temporarily vaporized heat carrier 15 with the aim of heating the packing press plate 13 faster, easier and more uniformly with reduced energy consumption.

In the area of the heating device 16, at least one heat exchanger 22 can additionally be arranged.

The packing press plate 13 is further provided with a known to the expert and preferably centrically acting suction device 23, by means of which on its front side 21, a negative pressure is generated with which the outer end cover 3 (FIGS. FIG. 1 ) is held firmly on the packing press plate 13 until it adheres to the roller 2 at the end of the pressing process.

And ultimately that shows FIG. 3 a side view of the packing press plate 13 of FIG. 2 ,

With regard to the function of the packing press plate 13, it should be noted that the at least temporarily evaporated heat transfer medium 15 condenses on the inner side 20 of the hollow body 14 and thereby at least the front side 21 of the Pack press plate 13 is heated. The packing press plate 13 thus forms a self-contained heat cycle.

The in the FIGS. 1 to 3 illustrated packaging apparatus 1 is in an excellent manner for carrying out the method according to the invention for attaching outer end covers 3 to a roller. 2

In summary, it should be noted that the invention improves a packaging device and a method of the aforementioned types such that the packed press plate is heated faster, easier and more uniformly with reduced energy consumption.

LIST OF REFERENCE NUMBERS

1

packaging device

2

role

3

Outer end cover

4

Role storage facility

5

king roll

6

profile frame

7

carriage

8th

role

9

Chain

10

transmission

11

electric motor

12

Pack press drive

13

Pack press plate

14

hollow body

15

heat transfer

16

heater

17

heating coil

18

Lower area

19

Control / regulation

20

inside

21

front

22

heat exchangers

23

suction

D

double arrow

V14

Hollow body volume

Claims (9)

A packaging device (1) for fastening outer end covers (3) to a roller (2) with a roller bearing device (4), at least one pack press plate (13) movable in the longitudinal direction of the roller bearing device (4) and mounted on a carriage (7) Slide (7) acting pack press drive (12),
characterized,
that the pack press plate (13) is formed at least partially as at least one hollow body (14) which is filled at least partially with at least one heat transfer medium (15), and that at least one preferably controllable / adjustable heating means (16) for at least temporarily evaporation of at least a heat carrier (15) is provided in the at least one hollow body (14), wherein the at least one temporarily evaporated heat transfer medium (15) on the inside (20) of the at least one hollow body (14) condenses and thereby at least the front side (21) of Heated packing press plate (13). Packaging device (1) according to claim 1,
characterized,
that the pack press plate (13) is formed as a hollow body (14) having a hollow body volume (V14), and
that the pack press plate (13) forms a closed heat circuit. Packaging device (1) according to claim 1 or 2,
characterized,
that the heat carrier (15) Water, air, and / or a thermal oil, in particular a mineral oil, a synthetic oil or a biological oil comprises. Packaging device (1) according to one of the preceding claims,
characterized,
in that the heating device (16) comprises at least one heating coil (17) which has at least one coil and converts an electrical current into heat and radiation energy by its ohmic resistance. Packaging device (1) according to claim 4,
characterized,
that the heating coil (17) is self-supporting or wound around a heat-resistant core, which is preferably made of tungsten. Packaging device (1) according to claim 4 or 5,
characterized,
in that the heating device (16) is arranged in the lower region (18) of the hollow body (14), which is at least temporarily filled with the heat carrier (15). Packaging device (1) according to one of the preceding claims,
characterized,
in that at least one heat exchanger (22) is arranged in the region of the heating device (16). Packaging device (1) according to one of the preceding claims,
characterized,
in that the packing press plate (13) is provided with a preferably centrically acting suction device (23) by means of which a negative pressure is generated at its front side (21), with which the outer end cover (3) is held fast on the packing press plate (13) until it at the end of Stick the press process to the roller (2). Method for attaching outer end covers (3) to a roller (2) mounted in a roller bearing device (4) by means of at least one pack press plate (13) which can be moved in the longitudinal direction of the roller bearing device (4) and mounted on a carriage (7) 7) acting pack press drive (12),
characterized,
in that the at least partially formed as at least one hollow body (14) and at least partially with at least one heat carrier (15) filled pack press plate (13) by means of at least one preferably controllable / controllable heating device (16) is heated, wherein the at least one heat carrier (15) in which at least one hollow body (14) is evaporated at least temporarily by means of the at least one preferably controllable heating device (16), condenses on the inside (20) of the at least one hollow body (14) and thereby at least the front side (21) of the packing press plate (13) heated.

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