DE10392784B4 - Device for clamping tool plates on processing rollers or tool carriers - Google Patents

Abstract

Device for clamping tool plates (1, 6) on processing rollers or tool carriers, characterized in that a tool plate (1, 6) provided for clamping is provided with cutouts (2) or openings or cut-outs in order to allow the gripper backs (3) to be immersed to allow in the tool plate (1, 6) and thereby prevent damage to the gripper tools and / or tools and / or cylinders, with maximum processing format or with a minimal white edge d. H. Waste.

Description

The invention relates to a device for clamping of tool plates on processing rollers or tool carrier.

In particular, sandwich tool sheets for cutting, punching, embossing, creasing and application of films in inline and offline sheet processing machines are to be clamped.

Are known punching tools or combined tools for the processing of substrates in the endless processing of roll on roll or from roll to end products, such. As labels, forms or packaging. In this processing, there is the advantage that all printed parts are lined up endlessly and so the individual processing stages are carried out successively in one run, and then finally brought into a final shape.

In the sheet processing, the printing materials are so far first printed in a printing press, and / or provided with paint and dried, then designed and later brought over several additional operations, such as finishing or further processing in the final form.

Is known by EP 1 283 765 B1 and DE 200 06 554 U1 in that the multiple refining and further processing of sheet goods or sheet-shaped substrates can also be carried out inline or offline.

In this case, similar to the continuous process, the individual processing steps are positioned one after the other and the sheets pass through the individual processing stations with the aid of gripper transport technology. With roller machines, no grippers are used, which, as is known, survive beyond the cylinder surface (see 1 ).

Known from offset plates and stamping plates are so-called register systems with z. B. U-shaped or index punched or fixation and clamping holes in the area of the clamping channels / clamping strips for positionally accurate recording and attachment, see DE 295 11 092 U1 ,

Are known mechanical holding systems and magnetic systems for holding tool plates z. B. flexible stamping sheets or so-called foil knife. Register systems for combined tool sheets with male and female dies were not considered.

Is known by DE 298 05 004 U1 in that punching plates are positioned and held on magnetic cylinders by means of positioning pins on the roller body (see 1 ).

From the GB 905 156 A For example, a device comprising a pair of upper and lower plates is known. On these plates tools are arranged, which can perform, for example, a cutting, a crimping or a stamping operation. Previously, gripper openings or punched holes or cutouts were not considered (see 1 ) and the possibility to clamp and hold tool sheets in connection with magnetic cylinders. The possibility of fastening tool plates (eg stamping plates, grooved plates, embossing plates, cutting tools, etc.) by means of a clamping device also makes it possible to work with cost-effective small format stamping plates, independently of magnetic cylinders.

The object of the invention is to find a solution which makes it possible for the sheet transport to use grippers and despite protruding gripper back while the normal conditions of the maximum format in printing in the further processing or finishing to achieve.

This object is achieved with a device having the features of claim 1.

The invention consists in that the tensioned tool plates receive punched holes or cutouts, as a result of which the gripper backs can unwind in the clamping channel or possibly also outside the clamping channel, and it is thus possible to arrange the punching lines as far as the gripper edge (white edge) (see 1 and 2 )

With the use of heavy (thick) substrates and normal tool plates, it may come due to the high processing forces to an unwanted elongation of the tool plates, and thereby causing a distortion that leads to a register inaccuracy.

By biasing the tool sheets and the additional magnetic forces this unwanted elongation is reduced or completely eliminated, so that accurate register cuts or edits can be performed (not shown).

When punching or cutting blanks from sheets, z. B. punching plates with low profile height, often creates the problem that the waste jammed in the stamped sheet and can not be safely sucked off, which has a damage of the punching plate and possibly also of the carrier tool result.

Known tools are compressed air or vacuum or simple rubber strips, but often do not prove to be strong enough to dispose of the waste safely. The introduction of rubber strips or the like also requires appropriate skill and has a considerable amount of time result, the production machine is or can not produce.

The invention consists in that full-surface hydropakets (see 3 ), are a component of the tool sheets or the stamping sheets. These Hydropakete prevent the jamming of waste and the damage to the stamping sheet. These parts can also be used directly by the operators on site, but this is preferably used directly with the tool plate and already integrated in the manufacture of the tool plates, so that long downtime can be avoided.

Known in offset printing are multi-metal z. B. bi- or tri- metal, as an alternative to the mono-metal plate (usually made of aluminum).

Are known tool plates with different thicknesses for different profile heights or depths, which are mostly for special tasks, eg. B. only label punching or just to Faltschachtelherstellung be used. The object of the invention is to develop a tool plate, which for several tasks / substrates with several profile heights and depths and several functions, such. As punching, grooving and embossing, can be used for tool-carrying cylinder or coat with a uniform diameter. It is conceivable that the Kalibrierfolien can be replaced by heatable films z. B. for hot foil stamping.

1 mm are difficult or difficult or depending on the cutting profile no longer attachable to magnetic cylinders, since the resulting counter-forces ensure no secure fit on the cylinder surface or the punching plate stands out during the working process of the magnetic cylinder.

A further disadvantage is that the voltage gradients that arise during subsequent bending lead to microcracks on the cutting tip.

Advantageous is the additional clamping device on the magnetic cylinder, which (possibly prefabricated) inferior from Kalibrierfolien, which are lighter in weight and ensures a cutting plate in vorgebogener design and a much safer fit on the magnetic cylinder surface, as well as the production of the cutting plates already in (partly) vorgebogener Execution (see 4 ). The bend is designed so that used tool sheets can be reused.

In order to ensure a register-based application of tool plates on the tool carrier a variety of so-called register systems are known in particular in sheet-fed offset printing machines.

For machines with multiple stations or printing units, it is particularly important for reducing startup waste that the tool plates to be applied and clamped on the tool carrier are brought into an exact register position with each other in order to ensure a minimum of waste during set-up.

In addition, it is of utmost importance that the so-called male and female die plates are clamped particularly precisely to each other. An electrical display is very meaningful in this sense.

Known in Offsetrotationsdruckverfahren the underlaying with different Kalibrierfolien to correct print length differences by placing the offset plate length (image carrier) with Kalibrierfolien.

Are known tool sheets of monomaterial with the specified thickness of about 0.5 mm. New are tool plates made of a multilayer material with - SANDWICH - structure, which can be manufactured completely prefabricated with calibration foils of uniform thickness, to be mounted on one and the same machining cylinder with the same cylinder diameter.

The invention is that it is possible for. B. optionally thin tool plates with relatively thick Kalibrierfolien (with low weight) conceivable Kunststoffkalibrierfolien or Metallkalibrierfolien, alternatively to relatively thick punching and Rillblechen with relatively thin Kalibrierfolie or even without foil, use and the same cylinder jacket for different profile heights or depths used will (see 5 ), possibly in combination with heatable foils for hot foil stamping.

The invention also includes U-shaped or index positioning punches for male and female die plates, which ensures shortest Einrichtzeiten and highest accuracy and thus damage to both o. Avoids tool sheets.

Further details and advantageous effects of the invention will become apparent from the following descriptions and drawings, which illustrate an embodiment of the inventive devices.

1 Side view of two processing cylinders with gripper shaft and gripper back, which unwinds through the punching or milling of the tool plate;

2 View of a tool plate with cut-out or opening or cut-out;

3 View of a sandwich tooling plate for punching with inserted prefabricated hydropaket;

4 View of a sandwich tool plate as a counterpressure for punching, with bent clamping straps; and

5 View with schematic representation of named tool sheets and thicknesses for different profile heights and / or depths.

The 1 shows a representation of a tool sheet 1 with punched openings 2 so that the gripper backs 3 , which are known to be above the cylinder surface, without damage, can unwind or dive into the top roller in the rotating pass.

The 2 shows a view of a tool sheet 6 with cutouts or openings or cutouts 8th so that the gripper backs can dip into the tensioned tool plate. Shown are U-shaped and index punched 7 for positioning.

Shown are the clamping plates 10 , Shown are also the slots or clamping holes 9 ,

The 3 shows a schematic diagram of a male punching sheet or tool sheet 11 with hydropackage 12 ,

The tightly enclosed liquid in two foils can be distributed in or against the running direction during the cutting process and presses the waste out of the tooling plate. The displacement of the liquid by the waste is exploited. Shown are also O-rings 13 and foam rubber strips 14 ,

The 4 shows a view of a die counter-pressure tool plate in sandwich execution 15 with illustrated clamping straps 17 for mounting in the clamping bar and the clamping holes 18 for clamping, as well as the combination of U-shaped and index punching 16 ,

The 5 shows a schematic representation of a uniform thickness in the tool plate for mounting on a normal tool carrier or mantle 20 with possible use of different male profile heights and / or die depths with different (or without) calibration foils 29 schematically represented by the reference numerals 21 to 28 , The calibration foil 29 could be replaced by a heatable film for hot foil stamping.

Claims (21)

Device for clamping tool sheets ( 1 . 6 ) on processing rollers or tool carrier, characterized in that a clamping plate provided for tool ( 1 . 6 ) with cutouts ( 2 ) or openings or cut-outs in order to prevent the gripper back ( 3 ) in the tool plate ( 1 . 6 ) and thereby prevent damage to the gripper tools and / or tools and / or cylinders, with maximum processing format or with a minimal white margin ie waste. Apparatus according to claim 1, characterized by a so-called sandwich construction of uniform thickness (thickness), composed of multilayer metal and / or plastic films of different thickness, so that different male profile height can be combined with different die tread depth on tool-carrying cylinders or tool-carrying cylinder jacket of uniform Diameter or circumference. Apparatus according to claim 1 or 2, characterized in that the tool plates applied to the tool carriers ( 1 . 6 ) with different thickness possibly pre-punched Kalibrierfolien be submersed and thereby different circumferences of the processing rollers arise and so the tool handling a print length adapted and further the gap between the tool surfaces can be adjusted, whereby the tool also to the material thickness and thus the immersion depth of the tool plates ( 1 . 6 ) can be adjusted. Device according to one of the preceding claims, characterized in that a processing roller or tool carrier as a magnetic cylinder for receiving tool plates ( 1 . 6 ) and in addition a tensioning device is provided, wherein the tool plates ( 1 . 6 ) z. As stamping plates, scoring plates or embossing tool plates may be. Apparatus according to claim 4, characterized in that the tool plates ( 1 . 6 ) can be biased on the clamping device, so that there is no unwanted elongation of the tools during the machining process or a restraint is enabled. Device according to one of the preceding claims, characterized in that the processing rollers or tool carriers are equipped with a vacuum and / or compressed air system, which makes it possible tool plates ( 1 . 6 ) or punching plates for waste disposal with vacuum or compressed air. Device according to one of the preceding claims, characterized in that a tool plate ( 1 . 6 ) is partially covered with a permanently elastic surface, or even made of a permanently elastic material, so that it is suitable as a dimensionally accurate and cost-effective counter tool for embossing and creasing. Device according to one of the preceding claims, characterized in that a tool plate ( 1 . 6 ) and / or a machining tool having a central opening or a plurality of decentralized openings, which makes it possible to waste through the tool plate ( 1 . 6 ) to suck or suck on the tool and / or blow off the tool. Device according to one of the preceding claims, characterized in that the tool plates ( 1 . 6 ) with full prefabricated ejector in the form of z. B. plastic inserts ( 14 ), Silicone coatings, or hydro flat packs ( 12 ), which makes it possible to separate the punching waste easily and safely from the tool. Device according to one of the preceding claims, characterized in that the counter tool at specific positions needle, z. As adhesive needles, are applied to the surface, receive the waste pieces, which are then removed at a later time by a suitable device from the counter tool again. Device according to one of the preceding claims, characterized in that a tool plate ( 1 . 6 ) has a relation to its mounting direction obliquely arranged sectional image, with the advantage that when obliquely guided sheet a rolling cut during the cutting process arises and thereby significantly lower cutting forces arise, resulting in an improved life of the tools. Device according to one of the preceding claims, characterized in that the tool plate ( 1 . 6 ) is bent and clamped on one side on the front side via a device provided in the tool holder, and on the opposite side only a simple pulling device for fastening, pretensioning and tensioning of the plate tool is required. Device according to one of the preceding claims, characterized in that the tool plates ( 1 . 6 ) and stamping plates from a profile height of about 0.8 mm are preferably profiled and manufactured in pre-bent design. Device according to one of the preceding claims, characterized in that the tool plates ( 1 . 6 ) have for the attachment necessary cross-sectional or thickness reductions (surface or eg grooves), which is easier to fold and hang during the mounting of the tool sheets ( 1 . 6 ). Device according to one of the preceding claims, characterized in that the tool plates ( 1 . 6 ) in a multilayer sandwich execution prefabricated. Device according to one of the preceding claims, characterized in that the front edge is prepared for electrical interrogatable dowel pins. Device according to one of the preceding claims, characterized in that in the tool plates ( 1 . 6 ) through openings are incorporated, the z. B. together with an attached z. B. elastic pad as z. B. Rillgegenwerkzeug serves. Device according to one of the preceding claims, characterized in that the tool plates ( 1 . 6 ) are to be handled with a quick release device without tools. Device according to one of claims 2 or 3, characterized in that heatable films can be used instead of calibration foils z. B. for hot foil stamping. Device according to one of the preceding claims, characterized in that both the male and the female die plates ( 1 . 6 ) with U-shaped punched or index or positioning punched ( 9 ) are provided. Device according to one of the preceding claims, characterized in that the tool plates ( 1 . 6 ) for reasons of weight saving or handling in large format (in 500 × 700 mm or 700 × 1000 mm) in sandwich construction are made for minimum weight ratios.

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