DE1652323A1 - Method and device for controlling separating devices on surface coating systems - Google Patents

Description

DipWng. August boshoh
Dipl.-Ing. Walter Jackisch

Stuttgart-Ii MmuakirtB '40

Adolf p r i ζ 16. Aug. 196?

Society ralt
limited liability
Stuttffart ^ B ad Cann
Haldenstrasse 94

A 29 840 - see

Method and device for controlling I

of towing devices on surfaces " coating & systems

The invention relates to a method for controlling Separating devices on surface treatment systems, in which Folian or the like. Continuously on workpieces finite length are applied, the transitions between successive workstocks Should form separation point η, as well as & Lne device for transit the procedure.

The control of separation devices, for example Cutting knives on systems for lamination of workpieces with foils are prepared in practice

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because in the systems workstacks with very different Thickness and very different surface dimensions can be laminated, since the foils used for lamination are in Color, thickness and elasticity are very different and since cost reasons are aimed at the gap to hold as close as possible between successive workpieces in order to avoid cutting losses as much as possible.

P There are already many possible solutions for this have become known, for example, devices working on a photoelectric basis in which a light source and a receiver cooperate in such a way that when the light passes between the workpieces this triggers a pulse in the appropriately arranged receiver, which in turn, if necessary after a corresponding Reinforcement puts the isolating device into operation. This Method in which the light beam passes through the gap between successive workpieces

* is sent through, 1st on larger workpieces Strength is limited, as the sources of error in thin workpieces are too diverse and too large. Even with thick workpieces, however, incorrect switching can occur, for example, if particularly which lamination materials are used,

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the duronhtuigen, or if the light beam is interrupted by laterally overhanging foils.

It is also already known to let a pushbutton switch act directly on the hashed surfaces and thus to detect the cutting gaps between successive workpieces. Even this fading could not be satisfactory "since there was no report * in the case of hard foils and small sons' fissures.

Furthermore, a method is already known in which, to control the separating device, the gap between successive workpieces is detected at a distance in front of the separating device prior to the application of the laminating material and this result is stored in order to be passed on to the separating device with a corresponding delay as a trigger pulse. This method has the rest have become known, (Method Although proven to be superior because the dependency Celts on the strength of the workpieces given there and the nature of the films are counter meaningless. For that but this method requires very precise guidance of the workpieces necessary for the

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actually cut off the small cutting gaps at the desired location. this in turn requires an undesirably high effort.

The invention is now based on the object of specifying a method * in which the aforementioned disadvantages are turned off and can be detected in which the cutting gap between the workpieces immediately on or before the separating device, P icke _| Heard and color of the coating material have no influence on the work result of the control device and in which in particular the workpiece dimensions, i.e. in particular

the thickness of the workpieces / the accuracy has no effect

the control is.

According to the invention, the »is achieved in that the Gap between successive workpieces due to an isotope emitter receiver element is detected and that the separator is triggered depending on the tone of the size of the input pulse at the receiver. The method according to the invention enables it in a simple way, contactless and also with all materials used in practice for casing to work old with the same security and accuracy,

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since only the difference in iBpula strength has to be recorded via the receiver, which results from radiation through the foils used for lamination and the workpiece or the foils alone.

In an embodiment of the method according to the invention, it can be expedient to emit the beams at different inclinations to their plane in order to adapt to the absorption capacity of the workpieces. At the same time or instead of these measures, it can be advantageous to use radiators of different intensities for the same purpose. The method according to the invention can hereby be used for workpieces or coating materials with extremely different absorption capacities, practically without changing the system.

The finding also relates to a facility for carrying out the aforementioned method, which is characterized in that in the direction of passage the layering system in front of the separating device at least one isotropic emitter and one of these

assigned recipient is arranged ;. Spotlights and Recipients can lie in alignment with one another

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be provided on opposite sides of the workpieces to be coated, the inclination of Isotropic radiators and receivers can be changed in relation to the workpiece. Such a design enables an adaptation to the absorption capacity of the respectively used one with very simple means Materials?

In the context of the invention, it may still be advantageous be able to assign several emitters to a receiver »which makes it possible to use one emitter proportionately to use low radiation intensity and for

the refine other / monitoring further.

If several emitters are used, it can be used in Embodiment of the invention be advantageous, this so to arrange that their beam paths share a common Have intersection, the receiver is to be arranged in this intersection.

A system that is particularly simple in its structure can be achieved in that the isotropic tracer is directly in the cutting area of the separating device is arranged.

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To enable a better adaptation to the absorbtion In addition, it can achieve the materials used for workpieces or foils nooh be expedient to attach the isotropic heater interchangeably, so that it can be replaced with one at any time smaller or larger radiation intensity is exchangeable.

A surface coating system in which film webs are continuously applied to plate-shaped workpieces are, and the erfindungsgerctiss with an isotropic radiator to detect the respective working point for the separation device is provided below explained in more detail with reference to a figure. About a guided tour 1 the cleaned and to be laminated workpieces 2 arrive in the system shown ideine glue application area 5, in which they can be on one or both sides as required be glued. From here, the now glued workpieces pass into the film unwinding and laminating machine 4, in which the films 5 used as coating material are applied endlessly to the workpieces 1 be that with moglthfct small distance to each other passed through the film unwinding and laminating mesh will.

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The distance between the individual workpieces 2 is thereby just as large that, on the lying in the travel direction F of the system behind aer laminator 4 cutting table 6, the individual workpieces can still be separated by the here only schematically indicated separating blade 7 from each other. The separating gap provided between the workpieces 2 is generally kept as small as possible * in order to keep the material losses caused by the efficient application of the foils 5 as small as possible. The hereby required precise control of Trennraeraser _s 7

is achieved according to the invention in that, which is also only indicated here, an isotope emitter 8 and a receiver 9 are assigned to the knife / in its working area. The arrangement of the radiator 8 and receiver 9 is only indicated in principle in the figure and can of course be done in any way, whereby an attachment in the area between the laminating machine 5 and the cutting table 6, preferably in the immediate vicinity of the knife, has proven advantageous. The radiator 8 can also be assigned directly to the knife 7.

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The different intensity of the 9 absorbed radiation, depending on whether these workpieces plus applied policies or only the film has to be properly penetrated is registered in the recipient «and in such a way that it emits a control pulse when the radiation intensity is high, which is possibly via amplifier and corresponding circuits which are not the subject of Invention and are therefore only indicated schematically here at IO, trigger the cutting process. After the separation of the workpieces 2, which are now covered with foils 5, these are used for further processing » namely forwarded for pre-pressing and possibly also reworking, but this is no longer shown here is.

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Claims (1)

1. Method for controlling separating devices on surface coating systems in which foils * tracks or the like are continuously applied to workpieces of finite length »with the gap between successive workpieces forms a predetermined separation point, characterized in that the gap through at least one isotope emitter receiver unit (8, 9) is detected and the separating device (7) is triggered depending on the size of the input pulse at the receiver (3) « 2. The method according to claim 1, characterized in that that to adapt to workpieces (2) different radiation Absorbtlonsfählgkeit the rays under different exposure to the workpiece level be sent out. 5. The method according to claim 1 or 2, characterized in that depending on the radiations Absorption of the coating material (5) or «of the workpieces (2) isotyope emitters (8) different intensity can be used. 2 - 109809/0623 BAD ORIQiNAt 4.) Facility to carry out the procedure according to One of the preceding claims, characterized gdexmeeicnnet that in the direction of passage (P) the An isotope emitter (8) is provided in front of the separating device (7), which is assigned to an Eapf finger (9). 5 · Device according to claim 4, characterized in that isotope emitters (8) and receiver (9) are in Alignment with one another on opposite sides of the coated workpieces (2) provided are. 6. Device according to one of claims 4 or 5 ,. characterized in that the inclination of the isotope emitter (8) and receiver (9) »opposite the workpiece plane can be changed. 7 device according to one of the preceding claims, characterized in that several radiators (8) are zuectfnet a receiver (9). 109809/0623 BATH ORIGINAL 8. device naoh claim 7, characterized in that that the radiators (8) have a common iohnittpunkt for their rays and that im Intersection of the beam cocks of the receiver (9) is arranged. 109809/0623 BAD ORtQINAL