EP2422993B1 - Braille casing - Google Patents

Description

The invention relates to a tool for a rotary embossing device according to the preamble of claim 1, and a folding box gluer with a Braille embossing device according to claim 12.

Folding cartons are cardboard or corrugated board packaging, and to a lesser extent plastic, which are glued at one or more points during the folding process, depending on the design. They are usually produced from a blank. The blanks are usually punched out on a sheet punch. The blank must be glued at least at one edge. The folded boxes come out of the carton gluer in the flat state. The placement and filling of the box can be done by machine or manually.

In addition to the folds required to produce the cartons, further creasing lines in the carton gluer are pre-folded (prefolded) to prepare for the subsequent production step. This facilitates the installation of the box and the subsequent filling.

If the cartons are used to package medicines, it is legally required to apply the name of the medicament in braille (so-called Braille) to the carton (eg by embossing). Also in so-called blister cards is often the requirement that Braille font or other imprints must be applied.

According to the prior art, the embossing of braille is carried out either during the punching process in the sheet punch in the production of blanks. However, this is expensive because a punching sheet several benefits, ie blanks contains and for each benefit a pair of tools consisting of die and male must be provided. Or rotary embossing devices with two rotating embossing tools are used, which may be part of a Faltschachtelklebemaschine example. As is known, such rotary embossing devices have a common drive for both rotary tools. In order to be able to apply the embossing in the correct position to the folding carton blank / blister cards, the rotating tools must be synchronized relative to the folding carton blank / blister cards. In particular, when introducing a braille in the carton blank synchronization must be done very accurately. Due to the moment of inertia of die, male and rotary drive the required accuracy of synchronization is difficult or impossible to achieve. Another disadvantage is that rotary embossing devices for better synchronization are often driven in start / stop operation. Ie. the rotary embossing tools are stopped for synchronization and subsequently accelerated again. As a result, the production capacity of the rotary embossing device is severely limited. Next you production is limited by the fact that no adjustment of the rotary embossing device to the size of the product to be processed is possible.

From the EP 20 36 712 A2 Such a rotary embossing device for a folding box gluing machine is known.

The known Braille stamping devices usually consist of an upper rotary tool, the Braille male and a lower rotary tool of the Braille die. The Braille patrix has a predetermined number of raised Braille embossing points on its embossing side. The Braille matrix usually has the maximum possible number of Braille point recesses; It is therefore designed as a universally applicable matrix. The number of recesses depends on whether the Braille embossing used is the usual 6-point basic shape or the 8-point basic shape.

In particular, in the manufacture of packaging for pharmaceuticals a variety of different Braille embossing is necessary. For this, the Braille male must be changed with each new order to be made, so that a large number of Braille patricks must be kept in the tool store.

To relieve the storage, it is from the DE 20 2008 017 133 U1 known to leave the roll body unchanged and only to change the tool. The tool is held by means of magnets on the lateral surface of the roller body.

It is also known to produce in the Braille stamping the male in the form of metal strips, which are then fixed on the Patrizenzylinder by screwing. The fixing holes necessary for fixing the sheet metal strip reduce the maximum circumferential surface on which an embossment, e.g. Braille, can be introduced. In addition, the fixation of the metal strip is difficult. If incorrectly fastened, the metal strip can be helical. This leads to quality losses with regard to the stamping quality. Furthermore, the metal strip is a settlement of the scope. The embossing created in the plane is used in the arc segment. This can lead to division errors. An air gap between the metal strip and the Patrizenzylinder leads to a rash, which in turn can lead to increased wear of the counter tool. This solution is not very suitable for embossing Braille because of the required high accuracy. Since the tool covers only part of the lateral surface, problems arise, especially at high production speeds, such as in folding carton production (up to 200,000 cartons (h)) due to the imbalance of the system. A corresponding countermeasure for balancing the system is necessary.

From the DE 20 2006 005 299 U1 For example, an embossing cylinder or an embossing sleeve arranged on a carrier core is known for producing an embossed structure on a thermoplastic material, such as a transparent decorative film. For this purpose, the embossing cylinder or the embossing sleeve have individual recesses in the entire cylindrical outer surface. The material to be embossed is guided through a gap between embossing cylinder and a smooth counter-roller. This device is unsuitable for embossing Braille.

Object of the present invention is to provide a use for a rotary device for embossing particular Braille in flat sheet material, in which the male is easy and easy to replace.

This object is achieved by a tool for a rotary embossing device according to the characterizing part of claim 1.

According to the invention, the tool for a rotary embossing device for embossing flat, sheet-like material comprises two rotary embossing tools in the form of a male part and a female part. At least the male part consists of a roller body with a seamless, closed tool sleeve attached thereto with raised embossing points on the outer surface of the jacket. The die has on its outer circumferential surface on the raised embossing points corresponding recesses. In an advantageous embodiment, the embossing tools are suitable for embossing Braille. In this case, the matrix can be designed as a universal Braille matrix, which has the maximum possible number of Braille recesses per Braille letter. These embodiments have the advantage that the entire peripheral surface can be used as a stamping surface. Compared to the known sheet metal strip according to the prior art thus the usable length for embossing is increased. Furthermore, the unbalance problems and pitch errors are eliminated over the known metal strip solutions.

In further preferred embodiments, the tool sleeve is made of aluminum or steel or magnesium, brass, bronze, titanium or plastic, so that the respective advantages of these materials, such as particular hardness, durability and wear resistance or low production price, or advantageously used for low-cost manufacturing process can be. The embossing points or recesses can thus be applied, for example, by deep drawing from the back or by application (build-up welding) or by removal such as milling, etching or erosion on the outside. Also materials with a corresponding surface coating such as hard coating are possible.

In further advantageous embodiments, the tool body for axial positioning of the tool sleeve on a stop. Alternatively, the tool sleeve on a stop which cooperates with a groove in the outer region of the roll body. As a result, a simple and secure axial positioning of the tool sleeve on the roll body is possible.

In a particularly advantageous embodiment, the stop extends obliquely on the tool sleeve and the groove in the outer region of the tool body.

Advantageously, the tool can be used in a Braille embossing device in a Faltschachtelklebemaschine.

Figur 1

eine perspektivische Darstellung einer Prägevorrichtung mit einem Werkzeug

Figur 2

die Abwicklung der Mantelfläche einer Werkzeughülse der Patrize

Figur 3

die Abwicklung der Mantelfläche einer universellen Matrize

Figur 4a-4e

Schnittdarstellungen verschiedener Befestigungsmöglichkeiten von Werkzeughülse und Walzenkörper

Figur 5

Schematische Darstellung mit einer Werkzeughülse als Rotor eines Elektromotors

Figur 6

Schematische Darstellung ohne Prägewalze

Figur 7

Erfindungsgemäße Werkzeughülse

Figur 8a, 8b

Brailleprägemodul für eine Faltschachtelklebemaschine

The invention will be explained below with reference to various embodiments. Show it:

FIG. 1

a perspective view of an embossing device with a tool

FIG. 2

the development of the lateral surface of a tool sleeve of the male

FIG. 3

the development of the lateral surface of a universal die

Figure 4a-4e

Sectional views of different mounting options of tool sleeve and roller body

FIG. 5

Schematic representation with a tool sleeve as a rotor of an electric motor

FIG. 6

Schematic representation without embossing roller

FIG. 7

Inventive tool sleeve

Figure 8a, 8b

Braille embossing module for a folder gluer

FIG. 1 shows an embossing device with an alternative tool 1, which is not part of the invention, in partially dismounted state. The tool 1 consists of an upper tool, which is designed as a male part 2 and a lower tool, which is designed as a die 3. The male part 2 consists of a roller body 4, on which a seamless, closed tool sleeve 5 is fixed, which has raised embossing points 24 on its outer shell surface, the sake of clarity in FIG. 1 are not shown. The die 3 also has a roller body 6, which has corresponding recesses 25 on its outer shell surface, the sake of clarity in FIG. 1 are not shown in detail. The recesses 25 can in this case be introduced either directly on the outer shell surface 7 of the roller body 6 of the die 3, or analogously to the male in a tool sleeve, not shown, which is mounted on the roller body 6 of the die 3. Both the male part 2 and the female part 3 are protected against contact by protective boxes 8, 9. The male part 2 is mounted on a flange, not shown, and is characterized by a Drive shaft 12 driven. Furthermore, it is guided by an upper tool guide element 10, which is supported on a crossbeam 15, laterally. The die 3 is mounted on a flange, not shown, and is driven by a lower drive shaft 13. Furthermore, it is guided laterally by a lower tool guide element 11, which is supported on a lower transverse beam 16. The drive shafts 12, 13 are driven by servomotors 14.

FIG. 2 shows a development of the lateral surface of a tool sleeve according to the invention a male part 2. The braille letters 26 shown in this embodiment are executed in the 6-point basic form, which has a maximum of six raised points 24 per character 26, which are arranged in two adjacent rows of points 27 ,

FIG. 3 shows a development of the outer shell surface 7 of the roller body 6 of a die 3. The die 3 is executed in the illustrated embodiment as a universal die and has the maximum 6 points per character as negative recesses 25 on. The matrix is thus to be used for all possible Patrizen of the 6-point Grundfom.

In the FIGS. 4a-4c are different mounting options of the tool sleeve 5 on the roller bodies 4, 6, wherein when using the universal die on the mantelaußenfläche 7 of the die 3 only the exchange and attachment to the roll body 4 of the male part 2 is necessary, which is why the representations are limited to this version ,

FIG. 4a shows the attachment by means of accurate fit between the roller body 4 and tool sleeve. 5 FIG. 4b shows the possibility of attachment of tool sleeve 5 on the roll body 4 by means of a self-locking cone 17. In Figure 4c has the roller body 4 on its outer side a stop 18 for axial alignment of the tool sleeve 5. In FIG. 4d the roller body 4 on its outer surface a groove 19 which cooperates with a stop 20 on the tool sleeve 5 and thus serves the alternative axial alignment. Another alternative is in Figure 4e shown. In this embodiment, the groove 12 and the stopper 20 are formed obliquely.

In addition, other fasteners are possible, which are not shown in detail, for example, the radial attachment by pin or screw or attachment by means of jaws. Of course, the different types of fastening can also be combined with each other.

The Figures 5 and 6 show alternative embodiments. In the execution according to FIG. 5 the tool sleeve 5 of the male part is designed directly as a rotor 22 of an engine. The collar of the tool sleeve could also be designed such that it serves as an incremental encoder for the engine.

In the execution according to FIG. 6 is completely dispensed with the roll body 4. The tool sleeve 33 is mounted directly on the outer ring 32 of the rolling bearing 31. The rotational movement is transmitted directly from the polygon shaft 34 to the tool sleeve 33. This eliminates the entire mass of the roller body 4. The inner ring 35 of the rolling bearing 31 and the tool holder 36 are rotatably mounted.

The FIG. 7 shows a further alternative embodiment of a tool sleeve. This is designed as a slotted tool sleeve 29. The tool sleeve 29 is fixed by means of a filler 30 on the tool body 4 by means of a fastening means, not shown, for example, a screw. Characterized that both the slot in the tool sleeve 29 and the side walls of the filler 30 are designed to be complementary chamfered, the filler 30 holds the tool sleeve 29 on the roller body 4 fixed. The clamping of the sleeve 29 on the tool body 4 also takes place by the already described conical design of the roller body 4. The positioning of the sleeve 29 in the circumferential direction on the roller body is effected by the fastening means described above. This embodiment allows a particularly simple and quick change of the tool sleeve.

The FIGS. 8a and 8b show the application of the tools according to the invention in a rotary embossing device for example, a Faltschachtelklebemaschine. In the embodiment, four tools 1 are juxtaposed for embossing in carton blanks 28.

LIST OF REFERENCE NUMBERS

1

Tool for rotary embossing device

2

punch

3

die

4

Roll body of the patrix

5

Tool sleeve of the male part

6

Roll body of the die

7

Shell outer surface of the die

8th

upper protection box

9

lower protection box

10

Upper tool guide element

11

lower tool guide element

12

upper drive shaft

13

lower drive shaft

14

servomotor

15

upper crossbar

16

lower crossbar

17

cone

18

attack

19

groove

20

attack

21

camp

22

rotor

23

stator

24

Sublime embossing points

25

recesses

26

Braille Letter

27

point number

28

A carton blank

29

Slotted tool sleeve

30

filling

31

roller bearing

32

Outer ring of the rolling bearing

33

tool sleeve

34

polygon wave

35

Inner ring of the rolling bearing

36

toolholder

Claims (10)

1. Tool (1) for a rotary embossing device for embossing flat, sheet-shaped material comprising two rotating embossing tools in the form of a male embossing tool (2) and a female embossing tool (3) for creating embossments,
   wherein at least the male embossing tool (2) includes a roller body (4) and a slit tool sleeve (29) having raised embossing dots (24) on the outer circumferential surface, and wherein the raised embossing dots (24) interact with corresponding recesses (25) in the female tool (3),
   characterized in
   that the slit tool sleeve (29) is fixed on the roller body (4) by means of a filler element (30), and that both the slit in the tool sleeve (29) and the side walls of the filler element (30) have complementary slopes in such a way that the filler element (30) holds the tool sleeve (29) on the roller body (4).
2. Tool according to Claim 1,
   characterized in
   that the embossing tools (2, 3) are suited for embossing Braille characters.
3. Tool according to any one of the preceding claims,
   characterized in
   that the female embossing tool (3) is a universal female Braille tool having a maximum possible number of Braille recesses (25) per Braille character (26).
4. Tool according to any one of the preceding claims,
   characterized in
   that the tool sleeve (29) or the outer circumferential surface (7) of the female tool (3) is made of aluminum or steel or magnesium or titanium or brass or bronze or plastic.
5. Tool according to any one of the preceding claims,
   characterized in
   that the tool sleeve (29) is provided with a surface coating, in particular a Hard Coat.
6. Tool according to any one of the preceding claims,
   characterized in
   that the roller body (4, 6) includes a stop (20) for the axial positioning of the tool sleeve (29).
7. Tool according to any one of the preceding claims,
   characterized in
   that for the axial positioning on the roller body (4, 6), the tool sleeve (29) includes a stop (20) interacting with a groove (19) in the outer region of the roller body (4, 6).
8. Tool according to Claim 7,
   characterized in
   that the stop (20) of the tool sleeve and the groove (19) in the outer region of the roller extend at an angle.
9. Braille embossing device including a tool (1) according to any one of Claims 1 to 8.
10. Folder-gluer including a Braille embossing device according to Claim 9.

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