DE3132565C1 - Process and apparatus for the patterning of a continuously advancing cloth web - Google Patents

Abstract

A process for the patterning of a continuously advancing cloth web with a treatment agent contained in foam, in which the foam is first provided in a layer and is then transferred onto the cloth web, after it has been made non-uniform in places or in tracks in a layer, for example by displacement or removal in places or in tracks or by the addition of a gaseous, liquid or solid treatment agent in places or in tracks. The apparatus comprises movement generators arranged above the foam layer, with an engagement element which "writes" in the foam, that is to say engages into the foam layer in the manner of a finger or pencil or other displacement article or, as a nozzle or collimator, directs a narrowly limited jet against the foam layer. The non-uniformities produced in the foam layer stand out on the cloth web as a corresponding patterning. <IMAGE>

Description

The invention relates to a method of the type corresponding to the preamble of claim 1 and a device suitable for carrying out the method.

In the preferred embodiment of the invention, the sampling is a colored sampling which one or more coloring liquids are contained in the foam. Except for the dye liquids As a treatment agent, however, there are also reservations that can be applied in foam form, agents that give a grip or influence the structure of the material web, and the like.

The material web can be a textile material web, but also a fleece, a paper web, a plastic web or the like.

Process of the type on which the preamble of claim 1 is based belong to the prior art Technology. The resulting pattern depends on the treatment agents present in the layer. It is also possible for different foams to be present next to or on top of one another in the layer. But always the treatment failure is determined by the presence of the layer, i.e. H. an offer of the treatment agent in a fairly even amount over which Area seen.

The invention is based on the object of providing a method according to the preamble of claim 1 underlying type and design a corresponding device so that a novel and further modification of the resulting sample image is possible.

According to the invention, this object is achieved in that the foam is in places or in traces in the layer becomes uneven.

Two points are particularly important here. One point is that the unevenness is already there in the layer in which the foam is provided,

before it is transferred to the web. As soon as the foam has passed onto the web, the pattern formation, for example the drawing up when dyeing, begins practically immediately and is an essential one It is no longer possible to influence the sample image. The other point is the determination that the unevenness should take place in places or in tracks. This can be done with the catchphrase »writing in foam« be circumscribed. The places or tracks should be point-by-point or line-wise zones from opposite the jo Represent the width of the web of substantially smaller dimensions. With a web width of 2 to 5 m these zones should have a diameter or a width down to the width of a finger or pencil. It however, larger dimensions also fall within the scope of the invention, i. H. all dimensions as required to achieve of patterns on the usual substrates such as textiles for clothing and decoration and for carpets are useful.

The unevenness in places or traces achieved in the foam layer goes with the Foam is applied to the web of material and is reflected in its sampling. This is a fact caused by it what is favored is that the foam has a much lower mobility or practically no mobility at all, compared with a liquid, depending of course on its foam number, i.e. the volume ratio between the liquid forming the foam and the foam. The higher the foam is inflated, the less its mobility and the more faithful the patterns created on the "surface" remain received during the transition of the foam to the web and also afterwards. In the case of a liquid, the In any case, uneven areas, if their extent is not too large, immediately again seek to converge so that only a little pronounced patterning can be seen on the web of material. The patterns that can be achieved with the invention when applying foam are characterized by a compared to a liquid pattern, which is known from DE-OS 23 61517, much larger Conciseness.

According to claim 2, the unevenness can be achieved by displacement of the foam. Here, the displaced amount of foam accumulates in the vicinity of the displacement area and leads there to an increased supply of treatment agents, which can be seen, for example, in the case of a coloring makes noticeable that the color appears particularly deep at the edge of the displacement area and emphasizes this.

This effect is absent if the foam according to claim 3 is removed.

Conversely, according to claim 4, something can also be added, namely a gaseous, liquid or solid treatment agent, which either treats the foam, for example around it locally to coincide, as it is known per se from DE-AS 22 14 377, or a Treatment effect on the web in addition to 60 to achieve the treatment effect achieved by the foam and its components.

The device for carrying out the method comprises a foam generating device and a over the width of the web extending 65 surface on which a moving layer of the Foam can be provided and from which the foam transfers to the web of material.

The "surface" can be formed in various prior art ways. A first An example is a run-off surface that is arranged across the web and inclined towards the web and onto which the Foam can be applied in a layer in the upper area and over which the layer is exposed to gravity slides down to pass from the lower edge of the drainage surface to the web. Another embodiment is an endless belt on which the foam layer is applied and which at a point with the web of material following the feed point in the running direction of the belt is brought together, which takes over the foam layer. Finally, the "surface" can also be defined by the Surface of a rotating roller extending transversely to the web of material to which the Foam layer is applied at one point and with which the web of material is applied in the direction of rotation of the Feed point is brought together to remove the foam from the roller surface take over.

According to the characterizing part of claim 5, the device according to the invention is characterized in that that one of the surface arranged opposite, at least one motion generator and one with it Connected attack element comprehensive device for unevenness in places or in tracks the foam layer is provided.

The attack element attacks the foam layer and brings it in places or in traces Unevenness. The attack element is moved by the movement generator to a To generate patterns in the foam layer moving past the attack element. It also falls under the invention that the motion generator generates the motion zero, d. H. the attack elements stand still can, so that there is a strip-shaped pattern in the foam layer. Usually, however the attack elements will also execute transverse motion components, thus creating a two-dimensional one Pattern is created in the foam layer.

The attack elements can develop their effect down to the bottom of the foam layer, but results The sampling according to the invention is also already possible if the foam layer is only at part of its height is uneven in places or in traces.

The motion generators can be common to several attack elements according to claim 6, which is shown in the reproduced in claim 7 manner can be realized.

However, a separate movement generator can also be assigned to each attack element.

While in the first-mentioned case the attack elements attached to the carrier are the same Training perform the same movement and thus create a pattern with a kind of repeat, In the second embodiment, there is a possibility of producing a completely arbitrary pattern, by all existing motion generators independent movements on the associated attack elements transferred.

An important embodiment of the invention is the subject of claim 9. Characterized at least one of the engagement elements can be switched off or, in the case of a mechanical engagement element, from the surface can be withdrawn, it can be overridden as desired, whereby a further modification in the sampling comes in.

In claims 10 to 19 different types of attack elements are described.

The rod-like or strip-like member of claim 10 should act like a kind of pencil or finger, the whole or partially protrudes into the foam layer on the surface ->. Such an attack element can be rigid or be flexible, especially in the latter case it is included that the engagement element is the surface touches and roams around on the surface.

A preferred embodiment of the attack element is the subject of claim 13. The tension member can be a more or less thick cord or a Be a chain or the like and perform through its mobility with respect to the motion generator independent movements, which are reflected in corresponding traces in the foam layer. It's falling under the invention that the tension member itself, for example if it is a chain, on the Attacks foam layer, but an additional pendulum body can also be attached to the free end, the moves in the foam layer.

Particularly in connection with the design of the surface as an inclined run-off surface, the configuration according to claim 14 comes into consideration. The shuttle rolls or drags this on the run-off surface back and? .- ■> her.

If it is a ball (claim 15), is the generated pattern track is relatively narrow with slowly blending edges.

In the case of a pendulum body with at least one plane jo Surface (claim 16) the track is wider and, since the pendulum body rests flat with the flat surface, completely cleared of foam.

The aforementioned attack elements displace the foam to the side.

According to claim 17, however, the engagement element can also be connected to a suction line be a standing suction tube that sucks the foam out of the foam layer in places or in traces.

Instead of removing the foam in places or in traces, something can also be done in such areas to be added. In the embodiment according to claim 18, this is achieved by a spray device realized, by means of which a narrowly limited jet of a gaseous, liquid or powdery Treatment agent can be directed to the foam. It is not the subject of the invention, the entire foam surface spray evenly. Rather, what is essential is the narrow limitation of the beam with which accordingly "writing in foam" is possible.

According to claim 19, the engagement element can also be a light source by means of which a narrowly limited Light or infrared beam can be directed onto the foam. Due to the in the area of impact of the jet in the foam Any heating that occurs breaks down the foam there or can also change in other ways, so that also on In this way a sampling can be achieved.

In the drawing, exemplary embodiments of the invention are shown schematically.

F i g. 1-3 are side elevational views across the web of various embodiments of the invention Device that differ by the type of surface on which the foam layer is provided will;

F i g. 4 and 5 are views in the longitudinal direction of t> 5 Web of various embodiments of the invention; Fig. 6 is a section along the line VI-VI in FIG. 5; F i g. 7 is a section along the line VII-VII in FIG. 5; Fig. 8 is a cross-section through a circumferential Tube-shaped carrier with elongated engagement elements;

F i g. 9 is a perspective view of a motion generator with all-round movable attack element;

Fig. 10 is a cross section through an arrangement with Suction trunks;

F i g. 11 is a view of a motion generator with a spray device attached;

F i g. 12 is a view of a motion generator with a light source and collimator arranged thereon;

Fig. 13 is a perspective view of another embodiment of the invention with across the web reaching support and attack elements;

FIG. 14 is a controller for an arrangement according to FIG. 13.

In Fig. 1, a web 1 is shown, which is not on a substantially horizontal guide Shown roles or the like in the direction of arrow 2 is moved forward. Across the width of the Material web is a run-off surface 3 in the form of an elongated rectangular plate with a closed flat one Surface provided on the upper area at 4 by a foam dispenser, not shown Foam can be applied in the form of a layer. The surface of the plate 3 forms the "surface" 5 on which the Foam in the form of layer 6 in the direction of arrow 7 under the effect of gravity over plate 3 slips down and merges from the lower edge 8 of the plate onto the web 1.

A movement generator 10, which is only indicated by a rectangle, is arranged above the plate 3 is and from which protrudes against the plate 3 an engagement element 12 in the form of a rod, the extends almost to the plate 3, but can also end a predetermined amount above it, at least but engages in the foam layer 6 and displaces and unevenly this at the relevant point. The movement generator 10 gives the attack element 12 movements that are perpendicular to the plane of the drawing, d. H. extend transversely to the web 1 and the direction of movement 7 of the foam layer 6, but also one May have components parallel to direction 7. As in connection with FIGS. 4 and 5 will be explained, a plurality of motion generators 10, each with an associated one, can transversely to the web 1 Attack element 12 may be present next to one another, or else it may be on a movement generator 10 a plurality of attack elements 12 arranged next to one another are seated.

F i g. 1 also shows that the arrangement of the motion generators and attack elements also in the direction 7 of the foam movement can be staggered, as by the second movement generator 10 ' with the engagement element 12 'is indicated.

In the embodiment of FIG. 2 is the "area" 5 through the approximately horizontal in the direction of arrow 13 leading upper run of a belt 14 guided endlessly around two drums 15, 16 is formed on which the foam is applied at 4 in the form of a layer 6 and with which the material web 1 is applied one of the point of attack of the attack element 12 downstream point is brought together at 17. The web 1 surrounds the drum 16 in the manner shown in FIG. 2 by a certain wrap angle 18, which is about 90 ° in the embodiment, and takes the between the

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Web 1 and the surface of the belt 14 imprisoned patterned foam.

In the exemplary embodiment in FIG. 3, the “surface” 5 is defined by the surface of a drum 20 formed, which rotates in the direction of arrow 21. The foam layer 6 applied at 4 becomes after passing of the engagement element 12 and the patterning taking place there between the surface of the approximately at 22 trapped on the circumference of the drum 20 web 1 and while passing the in the Example again about 90 ° of wrap angle 18 taken from the web 1.

What all embodiments have in common is that the foam, through the action of the attack elements 12 generated unevenness, for example a line-wise displacement, because of its low mobility in contrast to a liquid, until it moves from the surface 5 onto the material web 1 has passed. The patterns generated are thus embossed in the pattern image on the web 1 depending on the The stability or mobility of the foam is more or less concise, but always clearly recognizable. In Figure 4, the web runs perpendicular to the plane of the drawing. There are several motion generators 10 arranged next to one another with each associated attack element 12. Since every motion generator has a is assigned its own attack element, all attack elements 12 can be different from one another Execute movements, be it controlled by different programs, be it by one at a time Random generator controlled. The movement takes place according to FIG. 9 both according to the arrow 23 in Transverse direction to the web as well as according to the arrow 24 in the longitudinal direction of the web, so that Any patterns in the plane of the material web 1 come about through the superimposition.

In Fig. 5, a carrier 25 extending across the width of the web 1 is provided in the form of a square hollow profile, at the ends of which a movement generator 100 is attached to generate a movement of the bar in the direction of the arrow 26 transversely to the web 1 is and on the other side a movement generator 200, which produces a reciprocating rotary movement of the beam 25 in the direction of arrow 27. The ⁴ '''controlled superposition of the two movements creates a wide variety of patterns. In addition, a further patterning option is created in that the individual engagement elements 12 are attached to pneumatic piston / cylinder units 28, which allow the engagement elements to be lifted off the foam layer 6 The engagement elements 12 are out of engagement at the points indicated by the arrows 29. The pneumatic piston / cylinder units 28 are located on a common pneumatic supply line and can be optionally operated by electrically controlled valves. Corresponding magnetic actuators can of course also be provided instead of the pneumatic piston / cylinder units 28.

In the sectional view of FIG. 6 are those in the left half of FIG. 5 existing attack elements can be seen in detail. It is on the Piston rod 30 of the piston / cylinder unit 28 attached pipe or hose sections 31, which at retracted piston rod 30 in the manner shown in Figure 6 with its lower end

50

55

60

65 distance above the foam layer 6, while when the piston rod is extended, their lower end plunges into the foam layer 6 and displaces the foam at the relevant point. The tube or hose section 31 is shown open at the bottom, but can of course also be closed. It is also possible to attach even larger displacement or wiping bodies to the lower end, which increase the effective area of the engagement element 12 and produce wider areas or tracks at which the foam has been displaced.

Fig.7 lets another embodiment of the Recognize engagement element 12 in which, instead of the relatively rigid pipe or hose section 31 a completely flexible chain 32 is attached to the piston rod 30, which in the embodiment on the lower End carries a ball 33 which hangs above the foam layer 6 when the piston rod 30 is retracted, when the piston rod 30 is extended, it extends into the foam layer 6 in the manner indicated and this unevenly. The difference to the embodiment according to FIG. 6 is that there is the trace of the attack element is uniform over a certain width, while the ball has a track with a lowest point and a uniform rise towards the edges in the foam layer 6. the Embodiment according to FIG. 7 comes in particular in connection with the inclined plate 3 of FIG. 1 in Consider, in which case the balls 33 can roll back and forth on the surface of the plate 3. Instead of a ball On the flexible chain, a pendulum body 34, limited by flat surfaces, can also be in the form of a Cube or the like be arranged, the tracks generated according to the embodiment of Figure 6.

When the foam layer 6 different, in particular differently colored foams on top of or next to one another contains, there is an additional patterning effect that the attack elements 12 foam from a Drag the area into an adjacent area so that traces of the first foam can be found in the latter and help shape the pattern.

In Fig. 8 shows a further possible embodiment in which the carrier 25 is arranged across the web 1 reaching and similar to FIG. 5 tube driven by motion generators 100, 200 is formed, in which piston / cylinder units 28 'are arranged, which at the end of their piston rod via a resilient Connecting piece 35 carry wiper or displacement bodies which, when circulating in the foam layer 6 intervene, while sliding on the surface 5 while bending the connecting links 35 and the foam push away. The piston / cylinder units 28 'can be distributed over the circumference of the carrier 25, if this rotates continuously in one direction; when the carrier 25 has a reciprocating rotary motion executes, the piston / cylinder units are predominantly in one facing the foam layer To be arranged angular range.

In Fig. 10, an embodiment is shown in which a across the foam layer reaching Suction pipe 38 is provided with suction trunks 39 distributed over the width of the web 1, which in the Reach in foam layer 6 and vacuum off the foam in places or in traces. The foam is here so not displaced into neighboring areas, as in the previous embodiments, but downright removed from the foam layer 6. Naturally

230 264/485

can also be used for individual motion generators 10, for example according to FIG. 4 instead of the attack elements there 12 attack elements in the form of suction probes

39 may be provided.

In the embodiment according to FIG. 11, a spray device 44 is connected to a motion generator 10 , which has a spray nozzle 40 from which a largely parallel bundled jet 41 of a gaseous, liquid or powdery treatment agent can be directed onto the foam layer 6. The treatment agent can cause the foam to collapse in traces, as indicated at 42, or cause treatment effects in places or traces which act on the web 1 in addition to the effect of the foam layer 6. In the exemplary embodiment, the motion generator 10 is in accordance with FIG. 4 or 1 fixed and can change the direction of the jet of the nozzle

40 controlled or arbitrarily pivot in all directions, as shown in FIG. 9 is indicated.

In the embodiment of FIG. 12, a light source 45 is connected to the movement generator 10, which light source 45 comprises a collimator 46 which directs a parallel light beam 47 against the foam layer 6, which locally collapses as a result of the heating, as indicated by 48. Instead of the light source 45 with collimator 46, a laser arrangement can also be provided, which brings about a higher energy density. In the embodiment according to FIG. 12, too, the direction of the beam 47 can be adjusted by the movement generator 10 in the sense of FIG.

In the two last-mentioned embodiments, the nozzle 40 with the beam 41 and the collimator 46 with the light beam 47 form the attack element 12.

In FIG. 13, a further exemplary embodiment of the invention is shown in perspective, which has a carrier 25 extending transversely over the web according to FIG. 5 and attack elements according to FIG. 7 has. The balls 33 slide back and forth on the inclined drainage plate 3 in the sense of the transverse movement generated by the movement generator 100 according to the arrow 26 and the superimposed reciprocating rotary movement of the movement generator 200 according to the arrow 27 and experience additional displacements by the piston / cylinder units 28 In the case of the essentially vertical piston / cylinder units 28, the balls 33 can be pulled completely out of the foam layer 6, as shown in FIGS. 5 and 7, while the substantially horizontally extending piston / cylinder units 28 pull the balls 33 attached to them closer to the carrier 25 or leave them further away.

The foam layer 6 is in the embodiment of FIG. 13 generated by a slot nozzle 50, which extends over the entire width of the web 1 or the surface 5. The foam layer 6 produced can during their movement in the direction of arrow 7 over the surface 5 still through doctor blade arrangements, not shown are evened out before the attack elements 12 formed by the balls their pattern-forming Have an effect. The foam layer goes from the lower edge 8 of the plate 3 to the underneath im Direction of the arrow 2 running along web 1 and is immediately taken up by this. This is indicated by the frequency of foam bubbles decreasing towards the right edge 1 'of the web 1. Of course, the path to the complete collapse of the foam and its complete Uptake by the train can also be relatively much longer than in Fig. 13 shown.

In Fig. 14, a control for an arrangement according to FIG. 13 is indicated, which the production of repeatable patterns allowed.

A hydraulic pump 60 supplies pressure fluid via servo valves 61 and 62 to the motion generator 100, which is designed as a hydraulic lifting cylinder, or to the motion generator 200, which is designed as a hydraulic rotary motor. The servo valves 61, 62 are controlled by program curves 63, 64, 65 on endless belts 66, 67, 68. The endless belts 66, 67, 68 are driven by motors 69, 70, 71 at a predetermined speed. The program curves 63, 64, 65 are tracked by reading units 72, 73, 74, shown only schematically, which emit a voltage or a corresponding current corresponding to the deflection, which is amplified and as an electrical target value variable at the output of the target value generators 75, 76, 77 appears. In the exemplary embodiment, two program curves 63, 64 are provided for the movement generator 100, which are superimposed in an adding unit 78 and can be processed into a resulting setpoint value. The setpoint at the outputs of the setpoint generator 75 or the adding unit 78 reaches a setpoint / actual value comparator 79, to which an electrical signal representing the position of the piston in the movement generator 100 designed as a piston / cylinder unit is input as a further input signal results from the transmission of the movement of the piston rod 80 to a linear potentiometer 81 and is converted in an actual value transmitter 82 into the suitable input variable for the setpoint / actual value comparator 79. The servo valve 61 is thus controlled in accordance with the difference between the desired value corresponding to the instantaneous deflection value of the program curve 63 and the actual value representing the actual position.

Correspondingly, the motion generator 200 is connected to a rotary potentiometer 83, the output signal of which is processed in an actual value transmitter 84 and, together with the output signal of the setpoint transmitter 77, is input into a nominal / actual value comparator 85, which then controls the servo valve 62, which controls the Rotation of the carrier 25 is determined. It goes without saying that the rotation can also be modified by superimposing several program curves in a manner similar to that in the case of program curves 63, 64.

For this purpose 3 sheets of drawings

Claims (19)

Patent claims: 1. Method for patterning a continuously advancing material web with one in one Foam-containing treatment agent, in which the foam initially in one layer is provided and then transferred to the web, characterized in that the Foam is uneven in the layer in places or in traces. 2. The method according to claim 1, characterized in that the foam in places or in traces is displaced. 3. The method according to claim 1, characterized in that the foam in places or in traces Will get removed. 4. The method according to claim 1, characterized in that the foam in places or in traces a gaseous, liquid or solid treatment agent for the foam or the material web will be added. 5. Device for patterning a continuously running web of material with one in one Foam-containing treatment agent according to claims 1 to 4 with a foam generating device and a surface extending across the width of the web on which one moving layer of the foam can be provided and from which the foam onto the material web passes over, characterized in that one of the surface (5) arranged opposite, at least one Movement generator (10, 100, 200) and an associated attack element (12) comprising device intended to make the foam layer (6) uneven in places or in tracks is. 6. Apparatus according to claim 5, characterized in that the motion generator (10, 100, 200) several attack elements (12) is common. 7. Apparatus according to claim 6, characterized in that the engagement elements (12) on one arranged transversely to the web (1) over the surface (5), rotatable back and forth and parallel to self-displaceable carrier (25) attached and the motion generator (100, 200) with the Carrier (25) is connected. 8. Apparatus according to claim 5, characterized in that each engagement element (12) has its own Movement generator (10) is assigned. 9. Device according to one of claims 5 to 8, characterized in that at least one Movement generator (10, 100, 200) a device for switching off or lifting (28) the attack element (12) is assigned by the area (5). 10. Device according to one of claims 5 to 9, characterized in that the engagement element (12) is a rod-like or strip-like member (31, 35), which protrudes at least up to the vicinity of the surface (5). 11. The device according to claim 10, characterized characterized in that the engagement element (31, 35) is rigid. 12. The device according to claim 10, characterized in that the engagement element (31, 35) is flexible. 13. Device according to one of claims 5 to 9, characterized in that the engagement element (12) a flexible tension member (32), optionally with a pendulum body attached to one end (33,34) is. 14. The device according to claim 13, characterized in that the pendulum body (33, 34) the surface (5) rests. 15. Apparatus according to claim 13 or 14, characterized in that the pendulum body is a Ball (33) is. 16. Apparatus according to claim 13 or 14, characterized in that the pendulum body is a is limited by at least one flat surface body (34). 17. Device according to one of claims 5 to 9, characterized in that the engagement element (12) is a suction pipe (39) connected to a suction line (38). 18. Device according to one of claims 5 to 9, characterized in that the engagement element (12) is a spray device (44, 40) by means of which a narrow jet (41) of a gaseous, liquid or powdery treatment agent can be directed onto the foam layer (6). 19. Device according to one of claims 5 to 9, characterized in that the engagement element (12) is a light source (45, 46), by means of which a narrowly limited light or infrared beam on the Foam layer (6) is steerable.