EP2047973A2 - Rotation stamping device - Google Patents

Abstract

The rotary embossing tool for producing Braille inscriptions on cardboard (2) uses a male embossing roller (11) on one side of the cardboard and a female roller (12) on the other. The diameter (d1, d2) of the male roller used is changed to correspond to the gap between sheets of card fed through. Independent claims are included for: (A) a method for choosing male embossing rollers as described above; (B) a method for determining the optimum diameter for a male embossing roller; and (C) a carton gluing machine fitted with the embossing machine.

Description

The invention relates to a rotary embossing device according to the preamble of claim 1, a method for determining the optimum diameter of a male part of a rotary embossing device according to the preamble of claim 8 and a folding box gluing machine with a rotary embossing device according to claim 9.

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 for the packaging of medicines, it is legally required to apply the name of the medicament in Braille (so-called Braille) to the carton (eg by embossing).

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 there are rotary embossing devices with two rotating embossing tools are used, which may for example be part of a Faltschachtelklebemaschine. As is known, such rotary embossing devices have a common drive for both rotary tools. To the embossment in the right position on the To be able to apply folded carton blank, the rotary tools must be synchronized relative to the folding carton blank. 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.

The EP 1 447 211 A2 shows a device for impressing transverse grooves in cardboard. The EP 1 537 920 A1 shows an apparatus for cutting, creasing and embossing sheet material, such as cardboard, with two rollers. Both devices have in common that the synchronization can not be performed with the braille required accuracy and that no adaptation of the devices to the size of the product and the distance of the products is possible.

Object of the present invention is therefore to provide a rotary embossing device which overcomes the disadvantages of the prior art and allows high output at the same time high embossing quality. A further object is to describe a method for determining the optimum diameter of a male part of a rotary embossing device.

These objects are achieved by a rotary embossing device with the characterizing features of claim 1 and by a method for determining the optimum diameter of a male part having the characterizing features of claim 8.

A rotary embossing device according to the invention has two rotating embossing tools: a male and a female. The male part is provided with product-specific punches, wherein the die has a product-neutral hole pattern. By means of the embossing tools embossing is introduced into printing materials, such as cardboard or Faltschachtelzuschnitte. The embossing may be braille in particular. The diameter of the male part is advantageously matched to the distance of the front edge of a first printing material to be embossed and the leading edge of a subsequent printing material to be embossed. This distance is also referred to as a board pitch or section length of a printing material. The substrates to be embossed can be fed to the rotary embossing device, for example via belt conveyors.
By adjusting the diameter of the male to the carton division, the embossing quality and production efficiency can be significantly increased. If the circumference of the male part corresponds approximately to the carton pitch, then the male part can be rotated almost continuously, does not have to be driven in start-stop mode, and only small adjustment movements are required to synchronize the male part relative to the embossing position on the printing substrate.

In a first advantageous embodiment of the rotary embossing device, the male part is mounted on a male shaft and the female part is mounted on a female shaft. The two shafts are arranged parallel to one another at a fixed distance. The sum of the diameter of the male and female molds is approximately twice the shaft spacing. If, for example, a patrix with a larger diameter is mounted on the patrix shaft in order to optimize the output of the rotary embossing device, a die with a smaller diameter is correspondingly mounted on the die shaft. Conversely, if a male of smaller diameter contributes to a higher output of the rotary embossing device, a die of correspondingly smaller diameter is mounted on the female shaft. A device for feeding the printing materials to the rotary embossing device can be adjusted in height in an advantageous manner so that the printing material to be embossed between the male and female are transported.

In an alternative embodiment of the rotary embossing device, the male part is mounted on a male shaft and the female part is mounted on a female shaft. The two shafts are arranged parallel to each other and the rotary embossing means has an adjusting mechanism for adjusting the distance of the male shaft from the die shaft. The distance between the male shaft and the female shaft is set so that the shaft spacing corresponds to approximately half the sum of the diameter of male and female. If the rotary embossing device is equipped to increase its dispensing performance with a male of larger diameter, the distance is increased accordingly; If the rotary embossing device is equipped with a smaller diameter male part in order to increase its output, the distance is correspondingly reduced. The adjusting mechanism may advantageously be a linear actuator, which acts on the male shaft and is mounted in the frame of the rotary embossing device.

In an advantageous development of the rotary embossing device, this has a locking device and the male part is rotatably mounted on the male shaft by means of the locking device and easily replaceable. In a particularly advantageous, as simple, embodiment, the annular locking device is flanged onto the male shaft.

In an advantageous and alternative embodiment of the rotary embossing device, the diameter of the male part is infinitely variable.

The invention also relates to a method for selecting a male part for a rotary embossing device for maximizing the productivity of the rotary embossing device. For this purpose, in a first step, the distance of the leading edge of a first product to be embossed and the leading edge of a subsequent product to be embossed is determined. In a second step, the distance thus determined is divided by π, thereby obtaining the nominal diameter of the male part. In a third step, a male part of a set of male parts with different discrete diameters is selected so that the difference between the nominal male diameter and the selected diameter is as small as possible.

The invention further relates to an advantageous method for determining the optimum diameter of a male part of a rotary embossing device for maximizing the productivity of the rotary embossing device. In this case, in a first step, the distance of the leading edge of a first product to be embossed and the leading edge of a subsequent product to be embossed is determined. In a second step, this distance is divided by π and the optimum patrick diameter is obtained.

With regard to further advantageous embodiments of the invention, reference is made to the dependent claims and the description of an embodiment with reference to the accompanying drawings.

embodiment

Fig. 1

eine Faltschachtelklebemaschine mit erfindungsgemäßer Rotationsprägeeinrichtung

Fig. 2a

eine Rotationsprägeeinrichtung angepasst auf kleine Produkte

Fig. 2b

eine Rotationsprägeeinrichtung angepasst auf große Produkte

Fig. 2c

eine Rotationsprägeeinrichtung in einer Ausführungsform mit einer Patrize mit stufenlos veränderbarem Durchmesser

Fig. 2d

eine Rotationsprägeeinrichtung in einer Ausführungsform mit festem Abstand von Patrizen- und Matrizenwelle

Fig. 3

eine Einrichtung zum Arretieren einer Patrize auf der Patrizenwelle

The invention will be explained in more detail with reference to an embodiment. It show in a schematic representation

Fig. 1

a Faltschachtelklebemaschine with inventive rotation embossing device

Fig. 2a

a rotary embossing device adapted to small products

Fig. 2b

a rotary embossing device adapted to large products

Fig. 2c

a rotary embossing device in one embodiment with a male mold with a continuously variable diameter

Fig. 2d

a Rotationsprägeeinrichtung in an embodiment with a fixed distance from the male and female shaft

Fig. 3

a device for locking a male on the Patrizenwelle

Fig. 1 shows a Faltschachtelklebemaschine 1 with a rotary embossing device 10 according to the invention. Faltschachtelzuschnitte 2 are transported by a feeder in the transport direction T through the Faltschachtelklebemaschine 1 to a boom. The folding carton blanks 2 also pass through the rotary embossing device 10. This has a male part 11 and a die 12 for introducing embossments into the folding carton blanks 2. The folded-carton blanks 2 are transported at the speed vF. In the contact line of Patrize 11 and folding carton blank 2 during the embossing operation, the male die 11 has the speed vP. During the embossing process, the speeds of the die, male and folding carton blanks vM, vP and vF have the same amount so that there are no relative movements and thus markings of the stencil blanks Folding carton blank is coming.

Fig. 2a shows a rotary embossing device 10 according to the invention with a male part 11 and a die 12. The male part 11 is mounted on a Patrizenwelle 13 and the die 12 on a die shaft 14. Between the male part 11 and the female part 12, a folding box blank 2 is introduced into which an embossment is to be introduced. Patrizenwelle 13 and die shaft 14 have a distance x from each other. The diameter of the male part 11 is d1 and is thus matched to the distance A of the front edge of a first folding carton section 2 to be embossed and the front edge of a folding carton section to be subsequently embossed. The circumference of the male part 11 corresponds approximately to the distance A.

The rotary embossing device 10 further has an adjusting mechanism 21. By means of this, the male shaft 13 can be adjusted in the direction of movement a and thus the distance x of the male shaft 13 from the die shaft 14 can be changed.

In Fig. 2b the distance A of the leading edge of a first folding carton blank 2 to be embossed and the front edge of a subsequent printing material to be embossed are substantially greater than in FIG Fig. 2a , In order to maximize the productivity of the rotary embossing device 10, the rotary embossing device 10 has a male part 11 with a larger diameter d2. The circumference of the male part 11 corresponds approximately to the distance A of two folding box blanks 2. In order to mount the male 11 with its larger diameter d2 on the Patrizenwelle 13, the male shaft 13 was moved in the adjustment direction a by means of the adjustment mechanism 21 upwards and the distance x of male shaft 13 and female shaft 14 is increased accordingly.

Fig. 2c shows an alternative embodiment of the rotary embossing device 10. In this case, this has a male part 11, the diameter d1, d2 is infinitely variable. Due to the stepless adjustment of the diameter d1, d2 of the male part 11, the diameter d1, d2 of a male part 11 can be selected, at which the productivity of the rotary embossing device 10 is maximum. In Fig. 2c two possible diameters d1, d2 are indicated.

Fig. 2d shows an alternative embodiment of the rotary embossing device 10. A male part 11 is mounted on a Patrizenwelle 13 and a die 12 on a die shaft 14. Patrizenwelle 13 and die shaft 14 have the fixed, fixed distance x from each other. In order to achieve a high productivity of the rotary embossing device 10, the diameter d1, d2 of the male part 11 is adapted to the distance A of the leading edge of a first folding carton blank to be embossed and the front edge of a folding carton blank to be subsequently shaped. For larger distances A, a male part 11 with a larger diameter d2 is mounted on the male shaft 13. For smaller distances A, as shown in dotted, a smaller diameter dia d1 d1 mounted on the male shaft 13. Since the distance x of the male shaft 13 from the die shaft 14 is constant and immutable, depending on the choice of the diameter d1, d2 of the male die a die 12 must be selected and mounted on the die shaft 14 that the sum of the diameter of male 11 and die 12 corresponds to approximately twice the shaft spacing x.

In Fig. 3 is a possible embodiment of the locking device 22 for rotatably supporting the male part 11 on the male shaft 13 is shown. The male part 11 can be pushed from the left onto the die shaft 13 and moved to the stop of the locking device 22. The locking device 22 is formed as a ring, which was flanged onto the male shaft 13. The locking device 22 has a bore through which a cylinder screw can be plugged. The male part 11 has a threaded blind hole in which the screw is screwed. To the right of the locking device 22, the adjusting mechanism 21 may be located (not shown).

LIST OF REFERENCE NUMBERS

1

gluer

2

folding box

10

Rotary embosser

11

punch

12

die

13

Patrizenwelle

14

Matrizenwelle

21

Adjusting mechanism (actuator)

22

locking

a

Direction of movement of the male shaft

d1

Diameter of a first male

d2

Diameter of a second male

x

Distance of male shaft - female shaft

vP

Speed male

vM

Speed die

vF

Speed folding carton blank

A

Distance between two folding carton blanks

T

transport direction

Claims (9)

Rotational embossing device (10) with two rotating embossing tools, in the form of a male part (11) and a female part (12), for introducing embossings, in particular braille, into printing substrates (2),
characterized,
that the diameter (d1, d2) is tuned the male mold (11) to the distance (A) of the leading edge of a first printing material to be embossed (2) from the leading edge of a subsequently to be embossed printing substrate (2). Rotary embossing device according to claim 1,
characterized,
that the male part (11) is mounted on a male shaft (13) and the female part (12) is mounted on a female shaft (14), both shafts (13, 14) being arranged parallel to one another at a fixed distance (x) and the sum of Diameter of the male part (11) and die (12) is approximately twice the shaft spacing (x). Rotary embossing device according to claim 1,
characterized,
in that the male part (11) is mounted on a male shaft (13) and the female part (12) is mounted on a female shaft (14), whereby both shafts (13, 14) are arranged parallel to one another and the rotary embossing device (10) is moved by an adjusting mechanism (21 ) for adjusting the distance (x) of the male shaft (13) from the die shaft (14). Rotary embossing device according to claim 3,
characterized,
that the adjusting mechanism (21) has a linear actuator. Rotary embossing device according to one of claims 1 to 4,
characterized,
in that the male part (11) is secured on the male shaft (13) by means of a locking device (22). rotatably mounted and is easily replaceable. Rotary embossing device according to one of claims 1 or 3,
characterized,
that the diameter (d1, d2) of the male part (11) is infinitely variable. Method for selecting a male part (11) for a rotary embossing device (10) according to claim 4 for maximizing the productivity of the rotary embossing device (10), with the following steps: a) Determining the distance (A) of the leading edge of a first product to be embossed (2) and the leading edge of a product to be subsequently marked (2) b) Divide the distance (A) by π to determine the nominal diameter of the male c) selecting a male part (11) from a set of male parts (11) with different discrete diameters (d1, d2) so that the difference between the diameter determined in b) and the selected diameter (d1, d2) is as small as possible. Method for determining the optimum diameter of a male part (11) of a rotary embossing device (10), in particular according to one of claims 1 to 6, for maximizing the productivity of the rotary embossing device (10) with the following steps: a) Determining the distance (A) of the leading edge of a first product to be embossed (2) and the leading edge of a product to be subsequently marked (2) b) Division of the distance (A) with π to determine the optimal Patrizen-diameter Folding box gluing machine (1) with a rotary embossing device (10) according to one of claims 1 to 6.

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