EP0757107A2 - Apparatus for treating or working leather and other sheet materials, in particular for painting - Google Patents

Abstract

An assembly incorporating a series of roller presses treats leather or similar flat material by the application of fluid agents or pastes, esp. dyes. It consists of a feed section, a fluid application section, and a discharge section for the treated materials. The novelty is that, between one operating position and one non-operating position, the assembly incorporates a machinery group constituting a variable-position (a) feed section (ST1), (b) a fluid application section (ST2), and (c) discharge section.

Description

The invention relates to a continuous flow device, in particular a roller flow device, for treating or processing leather and similar flat materials, in particular for applying liquid and pasty media, in particular paints, to the leather, with at least one feed assembly, at least one work assembly, in particular an application assembly, and if necessary, at least one acceptance assembly for the delivery or continuation of the treated or processed flat material. Pass-through devices of this type are generally known in the art of leather production and leather processing. A particularly important area of application is the application of leather colors and leather finishes that have a thin to viscous or pasty consistency. For the sake of simplicity, the following only refers to the representative application in dyeing and printing machines for leather.

For this purpose, working assemblies with applicator rollers are generally used, which are connected to an ink supply, for example an ink tray, in one sector of their upper circumferential half and are given an adhering ink layer with the aid of stripping or metering elements. The leather to be treated is passed in rolling contact between the ink-bearing periphery of the application roller and a counter-pressure roller, the ink layer being transferred to the leather. For this purpose, the peripheral surface of the application rollers is usually provided with a precisely dimensioned surface roughness in order to ensure that the ink adheres evenly until it is transferred to the leather.

Even with effective ink wiping within the roller circumference sector between the transfer and new supply of ink, therefore, considerable amounts of ink inevitably accumulate on the roller circumference and also inevitably reach adjacent machine parts. At least each time the leather color is changed and the application rollers, which are often provided with different roughness and / or patterns for color printing, thorough cleaning of the roller arrangement with ink supply device and, if appropriate, the adjacent machine parts is necessary. In general, maintenance work on these continuous machines is often required for a uniform treatment quality of the high-quality leather material. Because of the complex structure of the present leather treatment machines, the accessibility with current designs is restricted both in the area of the feed assembly as well as in the work assembly and the removal assembly. This results in a relatively high share of operating costs.

The object of the invention is therefore to create a flow device of the type mentioned at the outset for treating or processing leather and similar flat materials, which is characterized by good accessibility to a plurality of different functional assemblies. The solution to this problem according to the invention is mainly determined by the features of patent claim 1.

This arrangement of separate or separable stations, at least one of which can be moved between the working position and the rest position, makes it possible to access the machine parts which are in need of maintenance practically from all sides. This training also proves to be progressive for repairs because the otherwise often necessary disassembly of machine parts or assemblies that block or hinder access to the actual repair object is largely eliminated.

Further developments and particularly advantageous embodiments of the invention are determined by the features of the subordinate claims. These features and advantages are explained below with reference to the examples schematically indicated in the drawings.

Fig.1

eine auf Wesentliches beschränkte Vertikalschnitt-Seitenansicht einer Durchlauf-Lederfärbemaschine im Arbeitszustand,

Fig.2

eine Darstellung der Maschine gemäss Fig.1 mit in Ruhestellung verfahrenen Stationen,

Fig.3a bis Fig.3e

in weiter schematisierter Seitenansicht je eine Kombination von drei ortsfesten bzw. verfahrbaren Stationen der Durchlaufeinrichtung, wobei jeweils in einer oberen Zeile die Arbeitsstellung und in einer unteren Zeile die Ruhestellung angedeutet ist,

Fig.4

in ebenfalls schematisierter Seitenansicht eine Durchlaufeinrichtung mit drei gleichermassen verfahrbaren Stationen in Arbeitsstellung und

Fig.5a bis Fig.5c

je eine aus der gegebenen Kombinationsvielfalt herausgegriffene Stationspositionierung der Durchlaufeinrichtung gemäss Fig.4 in Ruhestellung.

In the drawings:

Fig. 1

a vertical section side view limited to essentials of a continuous leather dyeing machine in the working state,

Fig. 2

1 shows the machine according to FIG. 1 with the stations moved to the rest position,

Fig.3a to Fig.3e

in a further schematic side view, a combination of three stationary or movable stations of the flow device, the working position being indicated in each case in an upper line and the rest position in a lower line,

Fig. 4

in a likewise schematic side view, a flow device with three equally movable stations in the working position and

Fig.5a to Fig.5c

One station positioning of the flow device according to FIG. 4, selected from the given variety of combinations, in the rest position.

The device shown in Fig. 1 and 2 is a roll-through dyeing machine for leather. It comprises a feed station ST1, which can be moved between the working position according to FIG. 1 and the rest position according to FIG. 2 by means of the chassis FG, as well as a similar removal station ST3. The work station ST2 is also equipped with such a chassis, but in the example repositioning is only shown for the two outer stations. It goes without saying that the movability of the workstation can also be advantageous for many purposes, for example extensive repairs or a relocation of the entire facility.

The directions of displacement of the stations are illustrated by clear arrows, which do not require a more detailed description and explanation.

The feed station ST1 comprises a leather feed device of a conventional type with an upper and lower conveyor belt BO or BU as the feed means VM. The lower conveyor belt forms a support surface AL for the spreading of leather pieces taken from a supply stock ZV. For the leather feed device and its VM feed means, separate, e.g. Electromotive drive means AMZ are provided, so that in this regard no complex connection devices and the like which are to be operated when moving the station are required. In general, e.g. Self-engaging and easily detachable coupling K1 is sufficient for securing the position of station ST1 at station ST2 in the working position.

The directions of transport and passage of the leather are also illustrated by clear arrows, which do not require a more detailed description and explanation.

The work station ST2 comprises an application roller arrangement AWA with an upper inking roller WF and a lower counter-pressure roller WG. As indicated for the sake of clarity only in Fig. 2 (rest position), there is an ink supply device FZV on the upper circumferential half of the inking roller, for example of a conventional type with ink fountain FK and unspecified stripping and ink metering elements and with a feed and reset device ZSV arranged. A conventional cleaning device RGV is located on the underside of the counter-pressure roller WG. The latter elements are familiar to the person skilled in the art and therefore do not require any further explanation.

On the other hand, it is essential to equip the work station and in particular the applicator roller arrangement AWA with its own drive means AMA, so that in this respect there is also a functional independence from displacement with a corresponding simplification of operation. It is also essential that the roll entry angle WEW of the applicator roll arrangement on the side of the station ST2 as well as the leather feed device with its feed means VM on the side of the station ST1 in the rest position according to FIG. 2 within one by moving a station or both neighboring stations Free space FR is easily accessible and can therefore be kept in optimal working condition at all times with little effort. This also applies in particular to the leather guide means LFM of the feed device, which can be seen in FIG. 2 and is adapted to the roll infeed angle WEW in the feed direction and preferably tapered at its front edge.

The station ST3 with its take-off belt arrangement BA also has its own drive means AMB and only requires the simple actuation of a clutch K2 for the transition between the working position and the rest position.

The free spaces FR between the adjacent stations formed by the movement of the stations ST1 and ST3 into their rest positions according to FIG. 2 furthermore allow the introduction of at least one flat shielding element AS in a very simple manner. This enables, in particular, an effective covering of the outer stations ST1, ST3 against contamination by sprayed paint residues during cleaning, especially in the case of high-pressure jet cleaning, the application roller arrangement and the ink supply device in the station ST2. For this, flexible, preferably soft-flexible, shielding elements are preferably provided at least in sections.

• Fig.3a: Ortsfeste Anordnung von Arbeitsstation ST2 und Abnahmestation ST3 mit zwischen Arbeitsstellung und Ruhestellung verfahrbarer Zuführstation ST1, z.B. für besonders schwere Maschinen.
• Fig.3b: ST1 ortsfest, ST2 gekoppelt mit ST3 verfahrbar, z.B. für Maschinen mit komplizierter und raumgreifender Zuführstation, etwa mit Spezialvorrichtungen für die Bearbeitung von grossen und zur Faltenbildung neigenden Häuten.
• Fig.3c: ST1 und ST2 ortsfest, ST3 verfahrbar, z.B. für relativ einfache und leichte Ausführungen der Abnahmestation.
• Fig.3d: Analog inverse Anordnung zu Fig.3c, z.B. für komplizierte und schwere Abnahmestationen, etwa für den Anschluss von Transportbahnen und/oder weiteren Bearbeitungsstationen.
• Fig.3e: Alle Stationen ST1, ST2 und ST3 miteinander gekoppelt verfahrbar, z.B. für leichte und einfach gestaltete Gesamtmaschinen, die nur gelegentlich der Entkopplung und gesonderten Positionierung ihrer Stationen bedürfen, jedoch etwa als Einheit an verschiedenen Arbeitsplätzen einzusetzen sind.

Examples of station positions that are particularly suitable for certain applications include:

• 3a: Fixed arrangement of work station ST2 and take-off station ST3 with a feed station ST1 that can be moved between work position and rest position, for example for particularly heavy machines.
• Fig. 3b: ST1 stationary, ST2 coupled with ST3 movable, for example for machines with a complicated and extensive feeding station, for example with special devices for processing large skins that tend to wrinkle.
• Fig.3c: ST1 and ST2 stationary, ST3 movable, for example for relatively simple and easy designs of the tapping station.
• Fig.3d: Analogous inverse arrangement to Fig.3c, for example for complicated and heavy removal stations, for example for the connection of transport tracks and / or other processing stations.
• Fig.3e: All stations ST1, ST2 and ST3 can be moved coupled together, for example for light and simply designed complete machines, which only occasionally require the decoupling and separate positioning of their stations, but can be used as a unit at different workplaces.

Fig. 4 shows again schematically the basic design already explained in Figs. 1 and 2 with trolleys at all stations, but without prejudice to a possible stationary operation of individual stations. So e.g. according to FIG. 5a analogous to FIG. 3c with a removal station that can be moved alone and according to FIG. 5b analogous to FIG. 5c finally shows a variant in which, on the one hand, the feed station ST1 is coupled to the work station ST2, but the removal station ST3 can be moved separately.

Claims (13)

Pass-through device, in particular roll pass-through device, for treating or processing leather and similar flat materials, in particular for applying liquid and pasty media, in particular paints, to the leather, with at least one feed assembly, at least one work assembly, in particular an order assembly, and optionally at least one removal assembly for the delivery or continuation of the treated or processed flat material, characterized in that at least one of the assemblies is designed as a feed station (ST1) or work station (ST2) or take-off station (ST3) which can be moved between at least one working position and at least one rest position. Continuous flow device according to claim 1, characterized in that at least two assemblies are designed as stations which are coupled or can be coupled to one another and can be moved jointly between at least one working position and at least one rest position (ST1 + ST2; ST2 + ST3). Pass-through device according to Claim 1 or 2, characterized in that an essentially stationary work station (ST2) and a feed station (ST1) and / or removal station (ST3) which can be moved with respect to this work station are provided. Pass-through device according to one of the preceding claims, characterized in that an essentially stationary work station (ST2) and a feed station (ST1) or removal station (ST3) as well as a removal station or feed station which can be moved with respect to the respective stationary stations are provided. Pass-through device according to Claim 1 or 2, characterized in that an essentially stationary feed station (ST1) and a work station (ST2) which can optionally be moved together with the removal station (ST3) is provided. Pass-through device according to Claim 1 or 2, characterized in that an essentially stationary removal station (ST3) and a work station (ST2) which can optionally be moved together with the feed station (ST1) is provided. Pass-through device according to claim 2, characterized in that a feed station (ST1), a work station (ST2) and a removal station (ST3) are designed to be movable together, coupled between at least one work position and at least one rest position. Pass-through device according to one of the preceding claims, characterized in that at least one station (ST1, ST2, ST3) is functionally decoupled in its rest position with respect to at least one neighboring station and / or is arranged at a distance. Pass-through device according to one of the preceding claims, characterized in that at least one planar shielding element (AS) is provided, which in a rest position of at least one of the stations (ST1, ST2, ST3) in a free space (FR) between the work station (ST2) and a neighboring module can be introduced. Pass-through device according to claim 9, characterized in that at least one shielding element which is flexible at least in sections, preferably soft-flexible, is provided. Pass-through device according to one of the preceding claims, characterized in that separate drive means (AMZ, AMA, AMB) are provided for the leather transport or the roller drive for at least one station (ST1, ST2, ST3). Pass-through device according to one of the preceding claims, characterized in that a feed station (ST1) is provided with at least one leather feed device which has feed means (VM) which engage the leather and are separate from the roller arrangement of the application device and have their own drive means (AMZ) . Pass-through device according to claim 12, characterized in that the leather feed device has in the feed direction a leather guide means (LFM) which is adapted to the roll entry angle (WEW) and preferably tapered at its front edge.

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