EP1974917B1 - Transfer device for changing film - Google Patents

Description

The present invention relates to a device for transferring a transfer layer of at least one transfer film web onto a printing substrate, wherein the transfer film web is provided as at least one film roll on a shaft and the shaft is interchangeably mounted by means of an exchange device according to the preamble of claim 1.

Furthermore, the invention relates to a method for transferring a shaft with at least one film roll into a device for transferring a transfer layer from at least one transfer film web according to the preamble of claim 8.

Preferably, the invention relates to a device which is suitable for so-called cold foil stamping.

In cold foil stamping, a transfer layer is transferred from a substrate to a substrate.

As a carrier material while a carrier film is used, which z. B. is connected by means of an adhesive layer with a transfer layer.

The transfer layer is transferred to a previously treated substrate. On the substrate is applied in advance in a commissioned work glue. In this commissioned work may be, for example, a conventional printing unit, in which by means of a plate cylinder and a corresponding printing plate adhesive is applied area by area on the substrate.

The transfer film, which comprises the transfer layer, is provided here as a transfer film web and is guided by a first film roll, ie from a supply roll into a transfer nip, and taken up again by a second film roll, ie a collecting roll.

For transferring the transfer layer to the printing substrate, the transfer film web and the printing material are passed together through the transfer nip. In the transfer nip, the transfer layer is transferred under pressure to the areas of the printing material applied with adhesive.

In order to simultaneously transfer different transfer layers to different areas of the printing substrate, partial film webs can be provided as a film roll both on the supply side and on the collecting side. The film wraps can either be provided jointly on a separate shaft or on a shaft.

A corresponding device for cold foil stamping is in the EP 0 578 706 B1 presented.

On a film roll only a limited amount of film webs is provided. After the film web is consumed on a film roll, this film wrap must be replaced on the supply side. On the collecting side, at some point so much film web has been rolled up that there is no space left for further film webs. It is then necessary to replace the foil wrap.

An exchange device for such film wrap is in the DE 10 2005 043 940 A1 presented. Here hoists are proposed in conjunction with a storage section, which should replace the individual film rolls, ie the film wraps.

The problem here is that with a manual control of the exchange process must always maintain an absolute overview of how the film wraps are inserted into the machine. Should z. B. the transfer above the head of the transfer controlling done, so here is not always guaranteed that in these overhead work a safe transfer of the film roll is done in the machine. For an automated winding exchange, ie an automated transfer of a Film winding also requires a very complex and error-prone system structure.

From the German utility model DE 9 106 689 U1 is a hot stamping machine for color coating embossed signs is known in which a film roll is provided within a cassette and replaced to replace the individual film wraps after their use, the entire cassette for replacement of the new film reel. A new roll is therefore provided for replacement outside the embossing machine in another cassette. This apparatus and method is not applicable to the use of large film packages, especially cold foil stamping machines, solely because of the size of the individual packages and the size of the machine used.

The object of the present invention is therefore to at least reduce the above-mentioned problems. It should be z. B. ensure a safe and easy transfer of the film wrap.

The object of this invention is therefore achieved by a generic device according to claim 1.

In this apparatus for transferring a transfer layer from at least one transfer film web onto a printing substrate, an exchange device is provided which comprises at least one releasable support member for supporting the shaft and at least one guide element for securely guiding the support member into an area of the device.

By the guide elements, the support member is guided so sure that a secure transfer of the film wrap is guaranteed. This is achieved in particular by the fact that not the film roll itself are handed over and not the shaft with the film rolls, but it is first a support member which carries the shaft inserted into guide elements. If this introduction to the guide elements has not been completed, it can not lead to an incorrect slipping out of the shaft or the individual foil wrap come because the shaft is still held by the support member. Thus, a safe transfer of the shaft is ensured by the support member in the device inside.

In a continuation of the invention is advantageously provided that the support member laterally at least two guide rollers for engaging in guide elements and that the support member is guided by a lowering in the region of a transfer position of the shaft so that the shaft is in this safe transfer position and it thus also by possible operating errors here can not come to a serious accident. The wave was carried by the wearer and the guides are guided into the transfer position of the device. In this position, the shaft is already stored in such a way that it can no longer be lost control of it.

In an advantageous development, it is provided that the carrying member further comprises a hook element which hooks on the shaft and releases the shaft by lowering the carrying member in the region of the transfer position.

Thus, if the shaft is in the area of the transfer position, the carrying member is lowered further and the hook element can be released from the carrying member. This lowering can also be done according to the invention by means of the guide elements. In this way, a controlled introduction of the shaft and thus the film winding is made possible in the device. In particular, even the release of the shaft is automatically prescribed in addition, so that the shaft can be brought into a safe position in an operating position.

In a further embodiment it is provided that the guide rollers have a lateral collar for centering the guide rollers in the guide elements. This provides the necessary accuracy with which the guide rollers, i. the support member, must be threaded into the guide elements, so that a simple transfer of the support member takes place in the guide elements.

A further embodiment of the invention advantageously provides that the guide elements are provided as guide grooves or guide slots in a region substantially above an operating position of the shaft in at least one housing part of the device or on at least one housing part attachable. These guide grooves or guide slots can be used in a simple manner as guide elements and possibly they are also subsequently advantageously attachable to a housing part.

To make the transfer of the shaft and thus the film winding to the transfer position and thus also in the field of operating position as simple as possible, it is provided that the guide elements are formed so that they lead in a first guide portion, the support member substantially in an area above a transfer position of the shaft, whereby it is achieved that the guide can be made at least with the aid of the visual force of the shaft and the support member. Furthermore, a subsequent second guide portion is provided, which is designed substantially so that this guide portion lowers the support member so that the shaft is released in the transfer position of the support member. As a result, the shaft is then provided that it can easily and safely reach the operating position.

In a further embodiment it is provided that the support member has a substantially downwardly projecting securing bracket. This safety bar is adapted to the environment of the device that a direct contact of a film roll on the shaft can be avoided with other equipment parts in its environment.

The object of the invention is furthermore achieved by a method for transferring a shaft with at least one film roll into a device for transferring a transfer layer from at least one transfer film web according to claim 8. It is provided that the support member is releasably connected to the shaft. The support member is then as described above then introduced into guide elements and guided by means of these guide elements in a secure transfer area within the transfer device. In a subsequent step, the support member can then be lowered from this transfer area so that the support member is released from the shaft. The shaft with the foil wrap can then be guided out of this safe area into the operating area or this transfer area can simultaneously act as the operating area. In any case, from the introduction of the carrying member in the guide elements a secure guidance of the shaft is given. Furthermore, no complex devices other than the guide elements and the carrying member are necessary.

In an advantageous continuation of the method, it is provided that for guiding the carrying member in the guide elements substantially the weight of Carrying member, shaft and foil wrap is used. As a result, a particularly simple guidance can be achieved by a user.

The device can of course also serve to guide the carrying member when it is raised and engages from below to the shaft, this shaft receives and along the guide, the shaft leads out of the transfer device again from the device. Again, there can be no danger situation by tilting the shaft.

A preferred embodiment of the invention, to which this is not intended to be limited and from which further features of the invention may result, is shown in the drawings.

Fig. 1

eine Folientransfervorrichtung in einer Druckmaschine,

Fig. 2

eine seitliche Darstellung eines Trageorgans zum Tragen eines Folienwickels

Fig. 3

eine frontale Darstellung des Trageorgans,

Fig. 4

ein in eine Folientransfervorrichtung eingesetztes Trageorgan,

Fig. 5

das Trageorgan in einem Übergabebereich der Folientransfervorrichtung,

Fig. 6

das Trageorgan nach der Übergabe des Folienwickels.

Show it:

Fig. 1

a film transfer device in a printing machine,

Fig. 2

a side view of a support member for supporting a film roll

Fig. 3

a frontal representation of the wearer,

Fig. 4

a carrier used in a film transfer device,

Fig. 5

the support member in a transfer region of the film transfer device,

Fig. 6

the support member after the transfer of the film roll.

Fig. 1 shows a section of a printing press with a film transfer device 1. Shown is a first printing unit of the printing press, which serves as commissioned work 2 here. In this commissioned work 2 adhesive is applied via an inking unit 3 on a printing plate cylinder 4 with a printing plate, not shown. The printing plate is so imaged that it in the areas that a picture-wise desired coating of a Sheet 5 correspond to a transfer layer, absorbs adhesive. About the printing plate cylinder 4, the adhesive is further transferred to a blanket cylinder 6. The blanket cylinder 6 is set against a counter-pressure cylinder 7 and forms together with this an order gap 8. The blanket cylinder 6 forms together with the printing plate cylinder 4, the inking unit 3 and possibly functionally connected with the adhesive application, not shown here elements, such as optionally a dampening unit, an applicator 9, which is employed in the manner shown here to the impression cylinder 7.

As a substrate, a sheet 5 is used, which is transported along a transport direction 10 through the printing press by means not shown transport elements. He is thereby passed through the application gap 8, where he is applied imagewise with adhesive. For the transport of the sheet 5, the impression cylinder may have grippers which engage the sheet at its front edge and pass through the application gap 8. The application gap 8 is formed by the impression cylinder 7 and the blanket cylinder 6 and, if no film transfer is performed in the printing machine, a conventional printing nip, in which color from the printing plate on the blanket cylinder 6 can be transferred to a sheet 5.

After the adhesive application in the commissioned work 2, the sheet 5 is transported via sheet transfer cylinder 11 to the transfer unit 12. This transfer unit 12 has a film module 13 with a transfer film supply roll 14 and a transfer film collection roll 15 as a film roll. The transfer ribbon collecting roll 15 as may also be provided separately from the transfer ribbon supply roll 14.

On the transfer sheet supply roll 14, a transfer film web 16 is provided rolled up on a shaft 102. The transfer film web 16 is guided via deflection rollers 17 and 18 to a transfer nip 19. The transfer nip 19 is formed by a transfer cylinder 20 and an impression cylinder 21, which are set against each other. The transfer unit 12 may be a printing unit of the printing press, which is set up in such a way that a transfer of a transfer layer from the Transfer film on the sheet 5 can be performed. The transfer cylinder 20 is then a blanket cylinder.

The sheet 5 is passed together with the transfer film web 16 at the same speed through the transfer nip 19. In the regions of the sheet 5 on which adhesive has been applied, the transfer layer of the transfer film remains adherent and is removed from the carrier film of the transfer film web 16. To support the adhesive action of the adhesive, it may be provided that the transfer layer is pressed onto the sheet 5 by a calendering nip, not shown here, which is arranged downstream of the transfer nip.

In front of the commissioning unit 2 and behind the transfer unit 12, further processing units, such as e.g. Be provided printing of the printing machine. As a result, the sheet 5 can be printed both before the film transfer and after. However, no further processing of the sheet 5 can take place in the two printing units which are used as a commissioned work 2 and as a transfer unit 12.

According to an alternative embodiment, which is not shown here, it can be provided that all devices involved in the film transfer are provided in a transfer mechanism 12, i. an application device 9, a transfer device 22, which may be formed at least from a transfer cylinder 20 and optionally from deflection rollers 17, 18 and a calendering device. In this case, another work of the printing press can then be used as a further processing plant. However, then order device 9 and transfer device 22 move into a joint work, where they are employed on the same impression cylinder 21. The distance between adhesive application and film transfer is considerably reduced and can lead to problems with the adhesion of the adhesive.

The film wraps 14, 15 are by means of a support member 100, as shown in the Fig. 2 is shown, entered into the film module 13 and taken out again.

As in Fig. 2 illustrated, the support member 100 comprises a hook 101, with each of which it can laterally hook on a shaft 102 of a film roll 14, 15, in the case shown here on the transfer film supply roll 14. For safely guiding the carrying member 100 in guide slots 200, which in the Fig. 4 are shown, the support member 100 comprises guide rollers 105 in the upper region. These guide rollers 105 can then be inserted into the guide slots 200.

In order to avoid placing the transfer film supply roll 14 when loading the film module 13 or placing the film collection roll 15 on removal from the film module 13, the carrying device 100 furthermore comprises a securing clip 103. This further points from the hook region of the carrying device 100 substantially vertically downwards and is so pronounced in length that it always surmountable film wraps. Thus, the carrying member 100, when moved in a downward direction, always abuts first with the securing bracket 103 before it can come into contact with a film roll 14, 15. If the securing bracket 103 is pushed from below, the hook member 101 is also moved upwards together with it. In contrast, it would come out of the hook 101 by a contact with the film wraps 14, 15 to a movement of the film rolls 14, 15 and it could lead to incorrect loading of the film module 13 or to a slipping of the film roll 14, 15 from the support member 100 come. This possible cause of the accident can be avoided by the securing bracket 103.

For a simpler handle of the securing bracket 103 is pivotable about a pivot 104 so that it can also assume a substantially horizontal position. This can be z. B. are used for removing de carrying member 100 from the region of the film module 13.

In the Fig. 3 is a frontal view of the support member 100 of the Fig. 2 shown. Identical elements are also described here with the same reference numbers.

As shown here, it can be seen that the support member 100 extends in the axial direction in each case over a film roll 14, 15 addition. For this purpose, the support member 100th in particular, a connection axis 107 between the guide rollers 105. This guide axis extends laterally beyond the film rolls 14, 15 and from this axis 107, the support member 100 extends in the direction of the shaft 102 of the winding 14, 15 and hook 101, with which the support member 100, the shaft 102 of the coil 14, 15 can record. As shown, it can be seen that on both sides of the shaft 102 axially the hooks 101 of the support member 100 are provided for receiving the shaft 102 and receive them. In particular, it is also possible that a plurality of sub-wraps 14, 15 are provided for partial film webs on a common shaft.

Slightly underneath the hooks 101, ie underneath the shaft 102, there is a swivel joint 104 on both end faces of the carrying member 100. Connected to this swivel joint 104 is the securing clip 103, which can thus be pivoted about the swivel joint 104.
Next, the support member 100 in the region of the connecting shaft 107, a connecting element 108, with which it is connected to a transport device, not shown here. This transport device ensures a safe transport of the support member 100 while keeping it in the air.

The Fig. 4 shows the interaction between the support member 100 and the transfer unit 12. In particular, it is shown how the support member 100 is guided into the film module 13 of the transfer unit 12. Identical elements are also provided here with the same reference numerals.

This is a lateral view of the transfer unit 12, wherein for reasons of illustration, the side wall 204 facing the viewer is shown substantially transparent. The transfer mechanism 12 has two end surfaces with such side walls 204, wherein the shafts 102 of the film wraps 14, 15 are each connected at least indirectly to the side walls 204. The axis of the film roll 14, 15 thus extends transversely between these side walls 204th

Each side wall 204 of the transfer mechanism 12 has at least one guide slot 200 as a guide element for the carrying member 100 for receiving a carrying member. In the case illustrated here, the film module 13 comprises one each Transfer film supply roll 14 and a transfer film collection roll 15. Both can be added by means of the support member 100 or by means of carrying members 100 in the film module 13 and taken out of this. The side wall 204 therefore has symmetrically in its two edge regions in each case guide slots 200 for the picking up and removal and guidance of carrying members 100 for the respective film wraps 14, 15.

In this case, the guide slots 200 have a first guide section 200a, which leads into the film module 13 substantially diagonally downwards. Further, the guide slots 200 on a second guide portion 200b, which leads substantially directly vertically downwards.

To insert the carrying member 100, the guide rollers 105 on lateral collars 106, with which the guide rollers 105 are inserted centered in the guide slots 200. These lateral collars 106 are in the Fig. 3 shown. Thus, a relatively inaccurate positioning of the guide rollers 105 of the carrying member 100 is sufficient relative to the guide slots 200 to automatically center them by the side collars 106 in the guide slots 200. The guide rollers 105 continue, as in Fig. 3 shown, extensions 109 which laterally protrude axially parallel to the connection axis through the guide slots to the outside. By the lateral extensions 109 in conjunction with the lateral collars 106 a simple positioning of the connecting shaft 107 with the guide rollers 105 and thus the entire support member 100 is made possible in the guide slots 200 in a simple manner.

In order to insert the carrying member 100, the guide rollers 105 are thus guided axially into the guide slots 200 on both sides. For this purpose, an operator, for. B. also use the circlip 103 to make a corresponding positioning of the support member.

If the carrying member 100 has been introduced in the upper region of the guide slots 200, it can now be moved diagonally on the guide rollers 105 into the film module 13 alone in the guide slots 200 in the first guide section 200a due to its weight force. The guide slots 200 are dimensioned such that the first and second guide portions 200a, 200b in a transfer area 300 adjacent to each other. This transfer region 300 is located in the side wall 204 at a position suitable that when the guide rollers 105 of the support member 100 are in this position, the shaft 102 of the film roll is located in a storage area 201 of the film module 13.

In particular, rails 202 may be provided in this storage area 201, on which the shaft 102 of the film roll can run so that they can be brought into an operating position 203 in which they are set up during operation of the transfer unit 12 for film transfer.

The Fig. 5 shows an enlarged detail of the film module 13, in which the film supply roll 14 with the support member 100 in the region of the transfer area 300 and the storage area 201 is located. Identical elements are here again designated by the same reference numerals as in the preceding figures.

If the guide rollers 105 in the transfer region 300 between the first and second guide portions 200a, 200b of the guide slots 200, as shown, the film roll 14 with its shaft 102 on the rail 202 in the storage area 201 on.

To transfer the film roll 14 to the film module 13, the guide rollers 105 are guided in the guide slots 200 in the second guide portion 200b vertically downwardly along an arrow 301. Simultaneously with the guidance of the guide rollers 105 and the hook 101 of the support member 100 is moved by the same amount in the direction of the arrow 301 down. The dimensions of the second guide section 200b are dimensioned such that the hook 101 completely releases the shaft 102 and is laterally pivotable out of the storage area 201.

A corresponding position of the hook member 101 of the carrying member 100 in the storage area 201 is in the Fig. 6 shown. The hook 101 has completely released the shaft 102 and can be swung out of the storage area 201 along an arrow shown become. This pivoting out, for example, be made manually by a user by means of the securing bracket 103.

As can easily be seen, the support member 100 can be guided again in the guide slots 200 after the release of the shaft 102 by the hook 101, so that the support member 100 is brought out of the area of the transfer unit 12 again. Accordingly, a hook member 101 can be inserted from a support member 100 empty in the guide slots 200 and pivoted under a shaft 102 to accommodate this and again on the reverse path along the guide slots 200 an empty supply roll 14 and a full collecting coil 15 again take out the film module 13.

By this described combination and interaction of support member 100 and guide slots 200 or even further improved by cooperation with the hook 101 and the securing bracket 103 can be a particularly safe transfer of film wrap 14, 15 and a safe removal of this film wrap 14, 15 in and out a transfer unit 12 in and out can be realized in a simple manner.

LIST OF REFERENCE NUMBERS

1 Foil transfer device 100 suspension unit 2 commissioned 101 hook 3 inking 102 wave 4 Plate cylinder 103 safety catch 5 bow 104 swivel 6 Blanket cylinder 105 leadership 7 Impression cylinder 106 lateral waistband 8th application gap 107 connecting axis 9 applicator 108 connecting element 10 transport direction 109 renewal 11 Sheet transfer cylinder 12 transfer unit 200 guide slots 13 foil module 200a first guide section 14 Transfer film supply roll 200b second guide section 15 Transfer film collecting roller 201 storage area 16 Transfer sheet 202 rails 17, 18 guide rollers 203 operating position 19 transfer nip 204 side walls 20 transfer cylinder 21 Impression cylinder 300 Transfer area 22 transfer device 301 arrow

Claims (8)

1. Device for transferring a transfer layer from at least one web of transfer foil (16) to a printing material (5), wherein the web of transfer foil (16) is provided as at least one reel of foil (14, 15) on a shaft (102) that is supported to be exchangeable by an exchanging device, the exchanging device comprising at least one removable support member (100) for supporting the shaft (102), and wherein at least one guide element (200) for securely guiding the support member (100) into an area of the device is provided,
   characterized in
   that on its sides the support member (100) includes at least two guide rollers (105) for engaging in guide elements (200) and that by being lowered, the support member (100) is guided into the area of a transfer position (300) of the shaft (102) so that the shaft (102) is located in this secure transfer position (300).
2. Device according to Claim 1,
   characterized in
   that the support member (100) includes a hook element (101) that hooks into the shaft (102) and releases the shaft (102) in the area of the transfer position (300) by a lowering of the support member (100).
3. Device according to Claim 1,
   characterized in
   that the guide rollers (105) include a lateral collar (106) for centring the guide rollers (105) in the guide elements (200).
4. Device according to one of Claims 1 and 3,
   characterized in
   that in an area essentially above an operating position (203) of the shaft the guide elements are provided in at least one housing part of the device or on at least one housing part or are provided to be attachable in at least one housing part of the device or on at least one housing part as guide grooves or guide slits (200).
5. Device according to at least one of Claims 1 to 4,
   characterized in
   that the guide elements (200) are designed in such a way that in a first guide section (200a) they guide the support member (100) essentially in an area above a transfer position (300) of the shaft (102) and in a following second guide section (200b) they essentially lower the support member (100) in such a way that in the transfer position (300), the shaft (102) is detached from the support member (100).
6. Device according to one of Claims 1 to 2 and 5,
   characterized in
   that the support member (100) comprises a securing bracket (103) extending essentially downward for avoiding direct contact between a foil reel (14, 15) on the shaft (102) and further apparatus parts.
7. Method for transferring a shaft (102) with at least one foil reel (14, 15) in a device for transferring a transfer layer from at least one web of transfer foil (16) according to one of the preceding claims,
   characterized in
   that a support member (100) is detachably connected to the shaft (102),
   is inserted into guide elements (200),
   is guided into a transfer area (300) and
   is furthermore lowered out of the transfer area (300) in a way for the support member (100) to be detached from the shaft (102).
8. Method according to Claim 7,
   characterized in
   that essentially the weight of support member (100), shaft (102) and foil reel (14, 15) is used to guide the support member (100) in the guide elements (200).

Images