DE102007060581A1 - Rotary embosser - Google Patents

Abstract

The invention relates to a rotary embossing device (10) with two rotating cylindrical embossing tools (11, 12), which is a male part (11) and a female part (12), for embossing, in particular braille, in a printing material (2). , in particular a Faltschachtelzuschnitt. The distance between the lateral surfaces of the male part (11) and die (12) during the embossing process corresponds approximately to the thickness of the substrate to be processed. The rotary embossing device (10) has a device (40) for temporarily changing the distance between the male part (11) and the female part (12) and an associated control, wherein the control means raising the male part (11) immediately after completing a respective embossing operation and lowering it directly Beginning of a respective embossing process by the means (40) for temporary change in distance initiates.

Description

The The invention relates to a rotary embossing device according to the preamble of claim 1 and a Faltschachtelklebemaschine according to claim 8th.

folding cartons Are packaging made of cardboard or corrugated cardboard, to a small extent also made of plastic, depending on the design during the folding process glued in one or more places. You will be in the Usually produced from a blank. The blanks are usually punched out on a sheet punch. The cut must be at least glued to one edge. The folded boxes are coming in the flat state from the carton gluer. The Setting up and filling the box can be done by machine or by machine also done manually.

Next the folds needed to make the cartons are, as preparation for the subsequent Production step also further creasing lines in the folding carton gluing machine pre-folded (prefolded). This will set up the box and facilitates later filling.

Serve the cartons for packaging medicines, so it is legal prescribed the name of the medicine in Braille (so-called Braille font) to apply to the carton (eg by embossing).

To The prior art, the embossing of braille is done either during the punching process in the sheet punch in the production of the blanks. However, this is expensive because a punching sheet many benefits, d. H. Contains blanks and for each benefit a tool pair consisting of die and patrix must be provided. Or there are rotary embossing devices with two rotating stamping tools used, which For example, be part of a Faltschachtelklebemaschine. Known wise, such rotary embossing devices have over a common drive for both rotary tools. Around the embossing in the correct position on the carton blank To be able to apply, the rotary tools must be synchronized relative to Faltschachtelzuschnitt. Especially when Inserting a braille into the carton blank must the synchronization is very accurate. Due to the moment of inertia from die, male and rotary drive is the required Accuracy of synchronization difficult or impossible to achieve. Another disadvantage is that rotary embossing devices frequently used in start / stop mode for better synchronization become. Ie. the rotary embossing tools become sync stopped and subsequently accelerated again. This will be the Production output of the rotary embossing device strong limited. It will further increase your production capacity limited, that no adaptation of the rotary embossing device to the size of the product to be processed possible is.

The DE-OS 28 33 618 shows a rotary embossing machine with interlocking embossing molds, which are each mounted adjustable on rotating rollers. While the embossing molds roll on each other, a gap is formed between them which corresponds approximately to the thickness of the product to be processed.

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.

task It is the object of the present invention to provide a rotary embossing device which overcomes the disadvantages of the prior art and At the same time high stamping quality a high output allows.

Solved This object is achieved by a rotary embossing device with the characterizing features of claim 1.

The rotation-pregiven device according to the invention has two rotating embossing tools, driven by at least one embossing tool drive, for introducing imprints, in particular braille, into printing substrates, in particular folded-carton blanks. The embossing tools are formed by a stamped male and a die. The template serves as a counter-mold and is advantageously product-neutral and has a uniform hole pattern. The rotary embossing device has a device for the temporary change in distance of the male and the female part and an associated control. The change in distance is done by raising the male. The raising of the male part is initiated by the control directly after completion of each embossing operation and the lowering of the male part just before the start of each embossing operation by the controller correspondingly driving the temporary distance changing device. While not embossed and the male and female are more spaced apart, in the soge called asynchronous phase, the embossing tools can be synchronized relative to a subsequent substrate. Ie. the punches of the male are positioned relative to the position of a surface of a subsequent substrate to be imprinted. The ability to lift the male immediately after completing a specific embossing operation and to lower it immediately prior to the start of each embossing operation maximizes the asynchronous phase and maximizes the time it takes to synchronize.

In an advantageous embodiment of the rotary embossing device the male and the female are transversely displaceable and lockable mounted on a die shaft or a Patrizenwelle. Thereby can be embossed across the width of a substrate be positioned.

In a first advantageous embodiment of the rotary embossing device, the male part is mounted on a Patrizenwelle and the means for temporarily changing the distance of the male part has at least one pneumatic cylinder which is connected to the Patrizenwelle. The device for temporary change in distance may in particular also have two pneumatic cylinders, wherein in each case one cylinder is connected to a respective end of the male shaft. The male shaft 13 is mounted vertically movable at its ends in guide elements. Through the at least one pneumatic cylinder, the male shaft can be temporarily raised.

In a second advantageous embodiment has the Device for temporary change in distance a controllable electric motor which via an eccentric or a connecting rod is connected to the male shaft. The male shaft is mounted vertically movable in guide elements and can temporarily raised by the rotational movement of the electric motor become.

In a third advantageous embodiment, the male part is also mounted on a Patrizenwelle. The device for temporary change in distance is connected to the male shaft and causes its temporary deflection. In an advantageous development of this embodiment, the male shaft is mounted at its two ends by a respective pair of supports. A respective pair of supports each has a point of attack, via which a bending force can be introduced, which then causes a defined deflection of the male shaft. Methods and devices for varying the deflection of a shaft, an axle or another carrier are known, for example, from US Pat EP 0 918 947 B1 known, in which case no deflection produced, but the deflection is to be limited or prevented.

In an advantageous embodiment of the rotary embossing device This one has a controlled blowing air nozzle in the area the die just below the transport plane of the substrate is arranged. Except during the stamping process the controlled Blasluftdüse generates an air jet, the created a gap between the die and Bedrucksoff. This gap causes the die and substrate during the asynchronous phase not in contact with each other and markings be avoided on the substrate.

Regarding Further advantageous embodiments of the invention is based on the Subclaims and the description of an embodiment below With reference to the accompanying drawings.

The The invention is based on an embodiment even closer be explained. In a schematic representation:

1 the structure of a Faltschachtelklebemaschine with inventive rotation embossing device

2a a detailed view of the rotary embossing device with liftable male

2 B a substrate with the position of the embossing

3a a device for lifting the male in a first embodiment

3b a device for lifting the male in a second embodiment

3c a device for lifting the male in a third embodiment

1 shows a Faltschachtelklebemaschine 1 with a rotary embossing device according to the invention 10 , folding carton blanks 2 be from a feeder in the transport direction T through the Faltschachtelklebemaschine 1 and by the rotary embossing device 10 transported to a boom. The rotary embossing device 10 has a patrix 11 and a die 12 for introducing embossing into the folding box blanks 2 , The folding carton blanks 2 are transported with a carton pitch A, also referred to as section length, at the speed vF.

In the contact line of Patrize 11 and folding carton blank 2 during the embossing process possesses the patrix 11 the speed vp. In the contact line of matrix 12 with folding chess telzuschnitt 2 during the embossing process has the die 12 the speed vm. During the embossing process, the speeds of die vM, male vP and folding carton vF have the same amount, so there is no relative movement between tools 11 . 12 and folding carton blank 2 comes and thus markings of Faltschachtelzuschnitt be avoided. To do this you need to patrote 11 and die 12 be synchronized relative to each other in terms of their speed. Next have to patribe 11 and die 12 be synchronized relative to each other with respect to their angular position, ie it must be ensured that the punch of the male 11 in holes of the die 12 can dive. Own patrix 11 and die 12 each own embossing tool drive so the synchronization is preferably electronically. Be a patrix 11 and die 12 driven by a common embossing tool drive, the synchronization is done mechanically, for example by coupling male 11 and die 12 ,

2a shows an embodiment of the rotary embossing device 10 , The rotary embossing device 10 has a patrix 11 , which rotationally fixed to a Patrizenwelle 13 is applied, and a die 12 , which are rotationally fixed to a die shaft 14 is applied. A respective folding box blank 2 is using guide straps 42 through the rotary embossing device 10 transported. Patrizenwelle 13 and template shaft 14 are coupled via a low-backlash gear pairing with each other. The male shaft 13 is at their respective ends by pivot bearings 45 stored. The distance from die 12 and male 11 Can be adapted to the thickness of the processed carton blank 2 through the actuator 44 be varied. In the carton blank 2 becomes in the area of a surface to be embossed during the embossing process 21 introduced a coinage. The extent of the area 21 in the transport direction T has the amount X.

The rotary embossing device 10 has a lifting device 40 the patrix 11 (not shown), through which the male 11 can be raised. In 2a there is the patrix 11 in raised condition, leaving between patrix 11 and folding carton blank 2 an air gap is. The raising of the patrix 11 happens in this embodiment by a deflection of the male shaft 13 , A lifting device 40 the patrix 11 by bending the male shaft 13 is in 3a shown. The patrix 11 is on a male shaft 13 stored. The male shaft 13 in turn is at its ends by a pair of columns 41 stored. The pair of supports 41 each has a point of attack to initiate a bending force F, which is the deflection of the male shaft 13 causes.

3b shows a rotary embossing device 10 like her, like in 1 shown at the position 10 is installed in a folding box gluer. The rotary embossing device has a male 11 , which on a Patrizenwelle 13 is stored, and a die 12 which are on a die shaft 14 is stored. Matrizenwelle 14 and male shaft 13 are arranged parallel to each other. During the embossing process, a carton blank is made 2 (not shown) between the male 11 and the matrix 12 moved through and die 11 and male 12 roll off each other. The male shaft 13 is at its two ends in each case in a bearing element 51 stored. The respective bearing element 51 in turn is in one element 50 vertically movably guided. Integrated in the element 50 is also the storage of the die shaft 14 , The rotary embossing device 10 still owns a facility 40 for lifting the patrix 11 , This includes two pneumatic cylinders 47 , A respective pneumatic cylinder is at its upper end with the machine frame (not shown) and at its lower end with the die shaft 13 connected. The pneumatic cylinders 47 be from a controller 52 so controlled that the male shaft 13 lifted immediately after completion of each embossing process and lowered immediately before the start of each embossing process. By the lifting movement b of the two pneumatic cylinders 47 experiences the patrix 11 also a movement b.

3c shows a rotary embossing device 10 like her, like in 1 shown in a folding box gluer 1 is installed. The patrix 11 is on a male shaft 13 stored, the die 12 on a die shaft 14 , Matrizenwelle 13 and male shaft 14 are arranged parallel to each other. During a stamping process, a folding box becomes blank 2 (not shown) between male 11 and die 12 moved through and the patrix 11 rolls on the die 12 from. The male shaft 13 is at its two ends in each case in a bearing element 51 stored. This bearing element 51 in turn is in one element 50 vertically movably guided. In the element 50 the bearing of the matrix shaft is also integrated. The rotary embossing device 10 also has a facility 40 for lifting the patrix 11 , This includes a controllable electric motor 48 , which is attached to the machine set (not shown). The axis of rotation of the engine 48 is connected to an eccentric 49 , which via a cylinder on the Patrizenwelle 13 acts. Eccentric and cylinder act together as a connecting rod 49 , With one revolution of the electric motor 48 leads the cylinder, driven by the eccentric 49 , a stroke b. This stroke b is via the Patrizenwelle 13 on the patrix 11 transfer, leaving the patrix 11 can be lifted by a movement b. The electric motor 48 is from a controller 52 there at so controlled that the patrix 11 lifted immediately after completion of each embossing process and lowered immediately before the start of each embossing process.

The male shaft 13 is thus raised in all three previously described embodiments only in the asynchronous phase, ie, if not embossed. The duration of the asynchronous phase is determined by the extent X of the embossing to be generated 21 and the speeds vP and vM. The distance between male 11 and folding carton blank 2 in the asynchronous phase, it allows the dies of the patrix 11 relative to the position of a surface to be imprinted 21 of the folding carton blank 2 to position and synchronize with it. By raising the patrix 11 directly after the stamping process and by lowering the male part 11 Immediately before the embossing process, the duration of the asynchronous phase is maximized and a longer time is available for the synchronization.

As in 2a shown, has the rotary embossing device 10 in the area of the matrix 12 a controlled blowing air nozzle 46 which by the control 52 is controlled. For the duration of the asynchronous phase, ie as long as the male 11 is in the raised state, is through the blower 46 Air between the die 12 and the carton blank 2 blown and thus a thin gap between die 12 and folding carton blank 2 generated. This will achieve that template 12 and folding carton blank 2 during the asynchronous phase are not in contact with each other and markings due to relative movements between die 12 and folding carton blank 2 are avoided.

1

gluer

2

folding box

10

Rotary embosser

11

punch

12

die

13

Patrizenwelle

14

Matrizenwelle

21

With an area to be marked

40

Facility for lifting the patrix

41

pair of supports

42

guide belts

43

spring assembly

44

actuator

45

pivot bearing

46

blowing air nozzle

47

pneumatic cylinder

48

electric motor

49

pleuel or eccentric

50

Stem shaft with guide for 51

51

Storage Patrizenwelle, guided by 50

52

control unit

vP

speed punch

vM

speed die

vF

speed folding box

A

distance second folding carton blanks

T

transport direction

X

length the imprint to be created

F

bending force

B

contact line Male-folding box

b

Move the patrix

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - DE 2833618 [0006]
• - EP 1447211 A2 [0007]
• EP 1537920 A1 [0007]
• EP 0918947 B1 [0014]

Claims (8)

Rotary embossing device ( 10 ) with two rotating cylindrical embossing tools ( 11 . 12 ), which is a patrix ( 11 ) and a die ( 12 ), for embossing, in particular Braille, into a printing substrate ( 2 ), in particular a Faltschachtelzuschnitt, wherein the distance between the lateral surfaces of male ( 11 ) and die ( 12 ) corresponds during the embossing process in approximately the thickness of the substrate to be processed, characterized in that the rotary embossing device ( 10 ) An institution ( 40 ) for temporary distance change of patrix ( 11 ) and die ( 12 ) and an associated controller ( 52 ), wherein the control is a lifting of the male ( 11 ) directly after completion of each embossing operation and lowering immediately before the start of each embossing operation by the device ( 40 ) initiates the temporary change in distance. Rotary embossing device according to claim 1, characterized in that the male part ( 11 ) and the die ( 12 ) transversely displaceable on a die shaft ( 14 ) or a male shaft ( 13 ) are mounted. Rotationsprägeeinrichtung according to any one of claims 1-2, characterized in that the male part on a Patrizenwelle ( 13 ) and the facility ( 40 ) for the temporary change in distance at least one with the male shaft ( 13 ) associated pneumatic cylinder ( 47 ), which is a temporary increase of the male shaft ( 13 ) causes. Rotationsprägeeinrichtung according to any one of claims 1-2, characterized in that the male part on a Patrizenwelle ( 13 ) and the facility ( 40 ) for temporarily changing the distance via a connecting rod ( 49 ) or an eccentric ( 49 ) with the male shaft ( 13 ) connected controllable electric motor ( 48 ), which together a temporary increase of the male shaft ( 13 ) cause. Rotationsprägeeinrichtung according to any one of claims 1-2, characterized in that the male part on a Patrizenwelle ( 13 ) and the facility ( 40 ) for the temporary change of distance with the male shaft ( 13 ) and causes their temporary deflection. Rotary embossing device according to claim 5, characterized in that the male shaft ( 13 ) at their ends by a pair of supports ( 41 ), which in each case has an attack point for the initiation of a bending force (F). Rotationsprägeeinrichtung according to any one of claims 1-6, characterized in that the rotary embossing device ( 10 ) a controlled blowing air nozzle ( 46 ) whose air jet has a gap between the die (except during the embossing process) 12 ) and substrate ( 2 ) generated. Folding box gluer ( 1 ) with a rotary embossing device ( 10 ) according to one of claims 1 to 7.