EP3812490A1 - Shielding device, shielding method and non-woven web-laying device - Google Patents

Abstract

The invention relates to a method and a device for shielding a moving card web (2) in a fleece layer (1), in particular a cross-stacker, the card web (2) on a laying belt (10) of the fleece layer (1) an upper movable main carriage (13) , in particular an upper carriage, is fed in the web direction (7). The card web (2) has an underside (6), an upper side (7) and side surfaces (4) located on their longitudinal edges and lies with the underside (6) on the laying belt (10). The side surfaces (4) of the card web (2) located on the laying belt (10) are covered by a housing (25) which can be installed or mounted in a stationary manner in the nonwoven layer (1) and shielded from external environmental influences, in particular air currents. The housing (25) interacts with the laying tape (10) and is in an overlapping and preferably sealing engagement with the lateral longitudinal edges of the laying tape (10) transversely to the web direction (7).

Description

The invention relates to a shielding device, a shielding method and a fleece layer having the features in the preamble of the independent claims.

Such a fleece layer with a shielding device is from EP 3 015 578 A1 and the EP 3 150 753 A1 known. Here, the card web lying with its underside on a laying belt and transported to a movable upper carriage is completely covered on its upper side by an overlying belt that is driven along with it. It is also disclosed to use a plurality of parallel wires or belts instead of the cover tape for covering the upper side of the card web in areas.

The DE 42 17 285 C1 deals with the delivery of a pile from the lower laying carriage to the discharge belt of a web layer, compensating for an angular error, the laid web being covered by an additional cover tape and protective sheets carried along on the laying carriage being arranged between the laying carriage and the cover tape.

It is the object of the present invention to show a better shielding technique.

The invention solves this problem with the features in the independent claims.

The shielding technology claimed, ie the shielding device, the fleece layer equipped with it and the shielding method, have various advantages.

The shielding device is an independently manufacturable and tradable item. It can be installed in the manufacture of a fleece layer. However, it can also be retrofitted to an existing fleece layer. She is appropriately trained and prepared for this.

The shielding technology claimed makes it possible to use a housing to cover and protect the side surfaces of the cardboard web located on the laying belt and fed to an upper main carriage, which extend along the direction of the web. The card web has an underside with which it lies on the laying belt, an upper side and the side surfaces located on the longitudinal edges and opposite one another. The bottom and the top have a width dimension which is greater than the height dimension of the edge-side side surfaces.

The function of the cover is to shield these side surfaces of the card web from external environmental influences, in particular air currents. In addition, the exposed upper side of the card web can be protected. An embodiment of the shielding technology is particularly advantageous in which the housing covers and shields the card web located on the laying belt on its feed path to the upper main carriage at least in some areas on all of its free surfaces. The laying belt and the card web enter the movable upper main carriage at an entry point. The housing extends in the direction of the track at least as far as the movable entry point of the upper main carriage.

This makes it possible to transport the card web transported on the running laying belt in a shielding channel which is closed at least on the side by the housing and on the underside by the laying tape. Air currents, in particular air eddies, can be kept away from the running card web in this way that they do not negatively affect the cardboard web. The shielding technology can in particular prevent the lateral longitudinal edges of the card web from being pressed in or folded over and, if necessary, also from a temporary lifting of parts of the card web relative to the laying tape. Undesired fading and the associated structural changes in the card web can also be avoided. For this purpose, a U-shaped shielding channel formed by the housing and the laying belt and at least partially open at the top can be sufficient. In a preferred embodiment, the shielding channel is also closed on the upper side and thus circumferentially at least in some areas in the peripheral direction.

The housing can cover said card web at least on one side with a distance. This distance can exist, for example, between the top of the cardboard sheet and the roof area of the housing. As a result, a flow-calmed free space or air space can be formed above the cardboard. The cover can also be spaced on the side surfaces of the card web. This lateral distance can be smaller than the distance upwards.

The housing can, for example, be installed or mounted in a stationary position in the fleece layer. She can have a rigid education. The housing can be arranged above the one main carriage, in particular the upper main carriage or upper carriage.

Due to a distanced cover, the card web transported on the laying belt does not come into contact with the housing. A negative influence on the card web from such a touch contact can be avoided. The housing can, however, come into a preferably sealing engagement with the running laying belt, in order to thereby seal the aforementioned To form shielding channel. The housing and the shielding channel formed can be open at the end faces or, if necessary, at least partially closed.

The housing has a wall that is impermeable to external environmental influences, in particular air currents. In an advantageous embodiment, the housing has a hood-like shape and covers at least some areas of the laying tape and the card web located on it. The wall is designed accordingly with side wall and roof areas. In another embodiment, the wall can only have lateral wall areas and be open at the top. On the other hand, the housing can adjoin the laying tape tightly, with the access of external environmental influences, in particular air currents, to the encased card web being likewise prevented at the connection point.

The mentioned directional references above, below and to the side relate to the position of the card web, in particular on, the laying tape. In the case of a customary design of the fleece layer, the card web lies with its underside on the laying belt. However, other configurations are also possible.

In the installation situation in the fleece layer, the housing can extend along the laying belt and the card web in the said web direction and along a travel path of one main carriage, in particular the upper carriage. Said route and the direction of the track can have the same longitudinal direction component. In particular, they can be in the same direction.

The housing can interact with the laying tape and be in sealing engagement with the laying tape, in particular with its lateral longitudinal edges. The The housing can be in an overlapping and preferably sealing engagement with the longitudinal edges transversely to the direction of the web. The housing can have a different engagement with the laying belt over its length or in the direction of the web.

The housing can be subdivided into partial areas along its length. It can reach under the laying tape in a first sub-area and reach over in another sub-area. An open slot remains between the overlaps.

Said partial areas can be arranged one behind the other in the direction of the web and adjoin one another closely. Different wall sections can be formed on the wall, in particular a lower wall, in the partial areas. At the transition point between the partial areas and wall sections, a support device, in particular a rotatable support roller, can be provided for the laying tape with the card web located on it. This laying belt is also referred to as a pile-guiding laying belt or infeed belt. The side walls of the sub-areas can overlap at the transition point and shield the cardboard laterally.

The section-wise under-reach and over-reach of the housing on the pile-guiding laying tape has advantages for the adaptation of the shielding and sealing effect to the travel movements of an upper main carriage, in particular the upper carriage. The sub-area or wall section with the grip under the housing on the laying belt can be located in an area outside the travel path of the said upper main carriage. The said sub-area or wall section with the overlap can be located in the travel path area of the said main car. As a result of the overlap, the flexible laying tape with the card web lying on it can move the said The main carriage can be rolled down or rolled up from the housing in a rolling movement. The lateral distance between the card web and the housing is advantageous for unrolling and rolling and for the collision-free passage of the card web through the free slot between the overlaps. The shielding function is guaranteed for the card web fed in until it enters the said upper main carriage, in particular the upper carriage, and in its receiving and entry area.

In the installation situation in the fleece layer, the housing can extend in length over the fault-prone area along the pile-guiding laying belt. The housing can, for example, extend in length in particular over the route of the main car. The housing can extend from a feed-side and at least largely interference-free area at the edge of the fleece layer, e.g. a feed-side end area of the fleece layer, to the said main carriage, in particular the upper carriage, and beyond.

The feed-side end area can be arranged on the front side of the fleece layer and can be the entry area of the card web into the fleece layer. The housing can end at this feed-side end area.

In the installation situation, the housing can extend as far as the said upper main carriage, in particular the upper carriage, when this is in an end position of its travel path which is furthest away from the said feed-side end region. At this distant end position, the housing can overlap said main carriage and end at its rear edge area or behind it. The housing covers the entry point of the card web in the said upper main car, in particular the upper car. Also in the other travel path positions between the said end positions the housing extends over the said upper main carriage.

The housing can have a straight extension. It can have the aforementioned open end faces. It can also be box-like and have a substantially C-shape in cross-section with said slot. The cross-sectional shape can be prismatic or rounded. The housing and its wall have side walls extending along the direction of travel and, if necessary, a tightly adjoining roof wall and a bottom wall adjoining the side walls, which laterally overlaps the laying tape, in particular its longitudinal edges. The lower wall can have the above-mentioned lower and overlapping wall sections. In the middle area it can have the mentioned slot-like opening corresponding to the C-shape.

The housing can be designed to be adjustable in terms of its dimensions. In an advantageous embodiment, the height of the housing is adjustable. In particular, the height of the wall sections which are formed on the lower wall and which reach under and over the laying tape in sections can be adjusted and adapted to the laying tape. They can have a sealing covering on the contact area with the laying tape, in particular its respective longitudinal edge.

In an advantageous embodiment, the fleece layer is designed as a cross-layer. Alternatively, it can be designed in a different manner, for example as a longitudinal layer or the like. The fleece layer has several, for example two, main carriages. This can be an upper main carriage, which is also referred to as an upper carriage. On the other hand, there can be a lower main carriage, which is also referred to as a laying carriage. The upper main carriage can be the first in the web direction or in the feed direction of the card web Be the main car. But there can also be other main car designs.

The fleece layer can have one or more laying belts, at least one of which is guided over said one and in particular upper main carriage or upper carriage. The fleece layer can be designed as a so-called tape layer. In an advantageous embodiment, it can have two or more, for example three, laying tapes. The laying belt (s) can also be guided over one or more other main carriages, in particular over the lower main carriage or laying carriage.

The card web can be embedded between two laying belts between the said main carriages, in particular the upper carriage and the laying carriage. It can be transported directly from one main car to the other. The fleece layer is designed as a synchronous layer in which the said main carriages always move in the same direction and with different path lengths and travel speeds. Alternatively, the card web and the laying belts can be guided between the said main carriage via a stationary deflection in a machine frame of the non-woven layer, a so-called counter-rotating non-woven layer being formed in which the said main carriage move in opposite directions with different path lengths and speeds.

The main carriages can be moved over a discharge belt of the fleece layer and place the fed card web on the discharge belt, a single-layer or multi-layer fleece being formed. The housing of the shielding device is arranged on the one section of the laying belt leading to the upper main carriage or upper carriage and the card web fed thereon.

The pile-guiding laying tape can be guided and stretched over deflection means. The deflection means can in particular be rotatable deflection rollers. The deflecting means are located at an end region of the web laying machine on the feed side and are here, for example, arranged in a stationary manner. On the other hand, they are located on a said upper main carriage, in particular the upper carriage.

A rotatable support roller or some other support means arranged at the transition point between the overlapping and overlapping wall sections can additionally support the spreading tape. This support roller or the support means can, in particular, be located near and outside the said end point of the main carriage travel path, which is arranged closest to the feed-side end region of the fleece layer. The support roller or the support means can support and define the aforementioned unrolling and rolling function of the laying belt on the underside of the housing during the travel movement of the said main carriage. On the other hand, an additional support function for the widely stretched laying belt can take place when said main carriage is in the end position furthest away from said end region. The support roller or the support means can be arranged on the shielding device or on the fleece layer.

The fleece layer can have one or more auxiliary carriages that pull out and support a tape loop on a laying tape in each case. These auxiliary carriages, which can be moved in the direction of the path, can each be coupled to a main carriage and can carry out a travel movement dependent on the main carriage movement.

An auxiliary carriage can be arranged and moved with a tape loop above the shielding device. An enclosure with a closed roof area or A shielding channel that is closed all the way around in the circumferential direction can protect the moving card web from interference from this main carriage, for example air turbulence. On the other hand, the said auxiliary carriage can be arranged and moved on the fleece layer in a kinematically and space-saving manner. Another auxiliary car can be arranged with its tape loop below the shielding device. It can be arranged between the shielding device and the discharge belt of the fleece layer. The laying tape and the closely adjoining housing protect the card web fed on the laying tape from the interference of this auxiliary carriage and the tape loop.

The shielding device also has advantages for the formation of the fleece layer, in particular for the design and arrangement of one or more, for example two, auxiliary vehicles. These can be arranged in a kinematically favorable and space-saving manner in an area above the discharge belt. At least one auxiliary car can be arranged in an area between the upper and lower main car. This enables a compact design. This embodiment also has advantages over an arrangement of auxiliary trolleys below the discharge belt, which is known in practice. The construction effort with roller arrangements, support devices, clamping devices, etc. can be reduced. The overall height of the fleece layer can also be reduced. In addition, the fleece layer can be adapted more cheaply to system components connected on the feed side and discharge side. A system component on the feed side can, for example, be a pile generator, in particular a card, an airlay or the like. A system component on the discharge side can be a consolidation device, in particular a needle loom, a hydroentanglement or the like.

The fleece layer can have a machine frame, a carriage guide and a drive device. The main carriage (s) and the auxiliary carriage (s) that may be present can at least partially have a common carriage guidance, which reduces the construction and space requirements and allows a compact design of the fleece layer. The shielding device is also advantageous for this, because a compact design could otherwise have particularly strong negative interfering influences on the card web fed in. The circulatingly driven laying belts and the main carriage (s) and the auxiliary carriage (s) that may be present can have separate drive components of a drive device. The drive components can have a rotating drive movement or a translatory drive movement, e.g. in the form of a linear drive for main and / or auxiliary vehicles. An electric linear motor, which can also have a guiding function, can be used for the drive for the main car (s) and, if applicable, the auxiliary car (s).

In one embodiment, the shielding channel formed by the housing and the laying tape can be empty. In another variant, which is not shown, means for influencing the card web running through and / or for influencing the air located in the duct interior can be present in or on the shielding duct. Such means can be, for example, drawn-in vertical or inclined bulkhead-like walls or the like. Furthermore, air currents can be directed into the shielding channel and towards the running card web in a targeted manner. These can, for example, press the card web against the running laying tape. With such air currents or the like, a stretching effect and / or a compressing effect can also be exerted on the running card web. This effect can exist locally. Such means can be, for example, guide walls, air flaps, blowing devices, suction devices or the like on the housing.

The shielding method for a moving card web in a non-woven layer, in particular a cross-layer, provides that the card web on a laying belt of the non-woven layer is fed to an upper movable main carriage of the non-woven layer, in particular an upper carriage, in the web direction and on its way by means of a housing arranged in the non-woven layer is shielded, which covers the side surfaces of the card web located on the laying belt and extends along the web direction and shields them against external environmental influences, in particular air currents. The card web located on the laying belt is preferably covered on all of its free surfaces and shielded against external environmental influences, in particular air currents.

The preferably hood-like housing equipped with a wall impermeable to external environmental influences, in particular air currents, can tightly connect the laying tape. The card web located on the laying belt is covered at least on one side, in particular on the upper side, with a distance.

The housing interacts with the laying belt and is in sealing engagement with it. The housing can in particular be in engagement with the longitudinal edges of the laying tape in an overlapping, preferably sealing, transverse to the direction of the web.

The housing, which is subdivided into several, in particular two, partial areas in the longitudinal direction or web direction, engages below and alternately and in each case sealingly overlaps the laying tape, in particular its longitudinal edges in the partial areas. In the first partial area seen in the web direction, there is an undergrip and in the subsequent partial area there is an overlap. The change from underreach to encroachment takes place at a transition point, which in the Area of a supply side nearest end position of the upper main carriage or upper carriage is arranged. The sub-area with the overlap of the housing is located in the area of the driveway of the upper main carriage or superstructure.

Further advantageous refinements of the invention are specified in the subclaims.

The claimed shielding device and shielding method and fleece layer can have the following design features that can be used individually or in combination.

The housing of the shielding device can be designed and arranged or arranged in the fleece layer in such a way that the housing covers the card web located on the laying belt on all of its free surfaces and shields it against external environmental influences, in particular air currents.

The housing of the shielding device can cover the card web located on the laying belt and fed to the upper main carriage at least on one side at a distance, in particular on the upper side.

The housing of the shielding device can have a hood-like shape or a shape that is open at the top in the installed position. The housing can have a wall impermeable to external environmental influences, in particular air currents. The housing, in particular its wall, can be designed and arranged or arranged in the fleece layer in such a way that it adjoins the laying belt tightly.

The housing of the shielding device can be designed and arranged or arranged in the fleece layer in such a way that it extends along the laying belt and the card web in the web direction and along a travel path of one main carriage, in particular the upper carriage.

The housing of the shielding device can be designed and arranged or arranged in the fleece layer in such a way that it interacts with the laying belt and is in sealing engagement with the laying belt.

The housing of the shielding device can be designed and arranged or arranged in the fleece layer in such a way that it is in an overlapping engagement with the longitudinal edges of the laying tape transversely to the web direction. This intervention can be sealing.

The housing of the shielding device can be subdivided into partial areas in the longitudinal direction. The housing can be designed and arranged or arranged in the fleece layer in such a way that, viewed in the web direction, it engages under the laying tape, in particular its longitudinal edges, in a sealing manner in one sub-area and overlaps sealingly in the other sub-area. The housing can reach under the laying tape at the bottom and reach over at the top.

The sub-area with the lower grip of the housing on the laying belt can be arranged on a fleece layer in an area outside the travel path of the upper main carriage, in particular the upper carriage.

The partial area with the overlap of the housing on the laying belt can be arranged in an area within the travel path of an upper main carriage, in particular an upper carriage.

Along the said main carriage travel path, the laying belt can be unrolled from the upper main carriage, in particular the upper carriage, relatively from the housing or rolled onto the housing.

The housing of the shielding device and / or the fleece layer can have a support means arranged there at a transition point between the subregions, in particular a rotatable support roller, for the pile-guiding laying tape.

The housing of the shielding device can be designed and arranged or arranged in the fleece layer in such a way that it is arranged in the fleece layer above the upper main carriage, in particular the upper carriage.

The housing of the shielding device can be designed and arranged or arranged in the fleece layer so that it extends in the fleece layer from a feed-side end region of the fleece layer to an upper main carriage, in particular the upper carriage, and possibly beyond. The housing can extend from the feed-side end area of the fleece layer to an end position of the travel path of the upper main carriage that is closest to this end area. The housing can extend beyond and over the driveway of the upper main carriage.

The housing of the shielding device can be designed and arranged or arranged in the fleece layer in such a way that it extends to an end position of the travel path of an upper main carriage, in particular the upper carriage, which is furthest away from a feed-side end region of the fleece layer.

The housing of the shielding device can be designed and arranged or arranged in the web layer so that it extends beyond the upper main car, in particular the upper car, at an end position of the travel path of an upper main carriage, in particular the upper carriage, which is closest to an end region of the nonwoven layup on the feed side.

The housing of the shielding device can be designed and arranged or arranged in the fleece layer in such a way that it extends over an entry point of the card web on an upper main carriage, in particular an upper carriage. The housing can end on the one hand at a feed-side end region of the fleece layer and on the other hand at an end position of the travel path of an upper main carriage, in particular a superstructure, which is furthest away therefrom.

The housing of the shielding device can have a support device designed for a stationary arrangement of the housing in the fleece layer. The support device can have a support frame for the wall of the housing, support arms for fastening the housing in the fleece layer. The support device can also have a support arm for a support means, in particular a support roller, for supporting the laying tape.

The housing of the shielding device can have a straight extension.

The housing of the shielding device can have open end faces.

The housing of the shielding device can be designed like a box and have a substantially C-shape in cross section. The C-shape can be open at the bottom in the installed position.

The housing of the shielding device can have side walls extending along the direction of the web. The housing can also have a roof wall that tightly adjoins the side walls. The housing of the shielding device can also have a lower wall adjoining the side walls, which laterally overlaps the laying tape, in particular its longitudinal edges.

The lower wall can each have a wall section that engages under the laying belt, in particular its longitudinal edges, and a wall section that follows in the direction of the web and overlaps the laying belt, in particular its longitudinal edges.

The lower wall can contact the laying tape in a sealing manner in the overlapping area. The lower wall can also have a sealing and sliding covering in the overlapping area. This also applies to the underlying and overlapping wall sections.

The claimed non-woven layer, in particular cross-layer, can have one or more movable auxiliary carriages coupled to a main carriage, in particular tensioning carriages for a tape loop of a laying tape.
An auxiliary carriage can be arranged with a belt loop above and / or below the shielding device and can be moved.

The claimed fleece layer, in particular cross-stacker, can have a machine frame, a carriage guide for the main carriage (s) and possibly one or more auxiliary carriages and a drive device for the one or more laying belts and for the main carriage (s) and possibly the auxiliary carriage (s).

Figur 1:

eine perspektivische Ansicht eines Vlieslegers mit einer Abschirmeinrichtung,

Figur 2:

eine andere perspektivische Ansicht des Vlieslegers von Figur 2,

Figur 3:

eine aufgebrochene Frontansicht des Vlieslegers von Figur 1 mit einer dargestellten Florbahn,

Figur 4:

einen perspektivischen Längsschnitt durch den Vliesleger und die Abschirmeinrichtung von Figur 1,

Figur 5 und 6:

eine Einhausung der Abschirmeinrichtung in einer perspektivischen Ansicht und einer Seitenansicht gemäß Pfeil VI von Figur 5,

Figur 7:

eine abgebrochene perspektivische Ansicht einer Übergangsstelle zwischen untergreifenden und übergreifenden Wandabschnitten der Einhausung,

Figur 8:

eine abgebrochene Stirnansicht der Anordnung von Figur 7 gemäß Schnittlinie VIII - VIII von Figur 6 und

Figur 9:

eine vereinfachte und abstrahierte Darstellung der Anordnung einer Einhausung an einem Vliesleger.

The invention is shown schematically and by way of example in the drawings. Show in detail:

Figure 1:

a perspective view of a fleece layer with a shielding device,

Figure 2:

another perspective view of the fleece layer of FIG Figure 2 ,

Figure 3:

a broken front view of the fleece layer of FIG Figure 1 with a shown cardboard web,

Figure 4:

a perspective longitudinal section through the fleece layer and the shielding device from Figure 1 ,

Figure 5 and 6:

a housing of the shielding device in a perspective view and a side view according to arrow VI from FIG Figure 5 ,

Figure 7:

a broken perspective view of a transition point between under and overarching wall sections of the housing,

Figure 8:

a broken end view of the assembly of FIG Figure 7 according to section line VIII - VIII of Figure 6 and

Figure 9:

a simplified and abstract representation of the arrangement of an enclosure on a fleece layer.

The invention relates to a shielding device (3) for a moving card web (2) and for installation on a fleece layer (1). The invention also relates to a shielding method and a fleece layer (1) equipped with the shielding device (3).

Figure 1 shows a fleece layer (1) with a shielding device (3) for a moving card web (2). The card web (2) is designed, for example, like cotton wool and consists of loose and, for example, randomly arranged fibers. It is designed as a non-woven product. The fibers can be synthetic fibers or natural fibers. The card web (2) has an underside (6), an upper side (5) and two side surfaces (4).

The card web (2) is fed to the fleece layer (1) by a system component (not shown), e.g. a pile producer, in particular a card, or an airlay, in a feed direction (43). The fleece layer (1) can have a feed device (12) for this purpose, e.g. a feed belt. In the non-woven layer (1), the single-layer or multi-layer cardboard web (2) that is fed in is deposited into a single-layer or multi-layer nonwoven (24) on a discharge belt (23) and from this in discharge direction (44) to a downstream system component, e.g. a consolidation device, in particular a Needling machine or hydroentanglement, removed.

The fleece layer (1) shown is designed as a cross-layer. It has a machine frame (8) with a side panel that is present at least in some areas. The fleece layer (1) has a feed-side end region (9) on one end. This can be designed as the entry area of the fed card web (2) into the fleece layer (1) and its machine frame (8).

The fleece layer (1) has several, e.g. two main carriages (13, 14). The main cars are arranged one above the other. The upper main carriage is hereinafter referred to as the upper carriage (13) and the lower main carriage as the laying carriage (14). The main carriages (13, 14) move back and forth over the revolving discharge belt (23) transversely or diagonally to the discharge direction (44). They are guided in the machine frame (8) by means of a carriage guide (17). The movements of the main carriages (13, 14) are directed transversely or obliquely to the direction of movement of the discharge belt (23) and to the discharge direction (44).

In the embodiment shown, the fleece layer (1) is designed as a co-rotating layer, the main carriages (13, 14) always moving in the same directions and with different travel path lengths and speeds. The lower main carriage or laying carriage (14) moves back and forth across the width of the discharge belt (23) and deposits the fed card web (2) on the discharge belt (23) while forming the fleece (24). The upper main carriage or superstructure (14) moves over half the travel distance of the lower main carriage or laying carriage (14) and moves at half the speed.

The fleece layer (1) has one or more endless and rotatingly driven laying belts (10, 11). In the embodiment shown, there are two laying belts (10, 11). Alternatively, the number of laying belts can be smaller or larger. The laying belts (10, 11) transport the card web (7). They are guided over the main carriages (13, 14) by means of deflection means (19), for example rotatable deflection rollers. Such deflection means (19) for the laying belts (10, 11) are also arranged in the machine frame (8). Figure 4 illustrates the guide tape.

One laying belt (10) picks up the fed card web (2) at the end area (9) and transports it in the web direction (7) to the upper main carriage or upper carriage (13). This laying belt (10) is referred to as an infeed belt or a pile-guiding laying belt. The other laying belt (11) forms a counter belt which is also guided over the upper main carriage or upper carriage (13). On the upper main carriage or upper carriage (13), the fed card web (2) is deflected in the opposite direction, preferably by 180 °, where it is then picked up between the laying belts (11, 10) and transported to the lower main carriage or laying carriage (14) .

The upper main carriage or superstructure (13) has an inlet point (22) for the laying belt (10) or infeed belt and the card web (2). The counter bath (11) can be fed in at the inlet point (22), which is, for example, designed like a funnel. A perforated pressure roller (45) for pressing, compressing and venting the card web (2) can also be arranged in the funnel area. The laying belt (10) and the card web lying on it are deflected by 180 ° on the main carriage or upper carriage (13) via several, e.g. three deflection means (19).

The fleece layer (1) shown also has one or more, for example two, auxiliary carriages (15, 16) which can be moved parallel to the main carriages (13, 14) on a preferably common carriage guide (17). The auxiliary carriages (15, 16) are designed, for example, as tension carriages, each of which pulls out a tape loop (20) of a laying tape (10, 11). This serves to compensate for fluctuations in the travel speeds of the main carriages (13, 14), for example for profiling the fleece (24) and to avoid thickening of the edges of the fleece (24).

The auxiliary carriages (15, 16) are each suitably coupled to a main carriage (13, 14), e.g. by means of a traction device or coupled drives. The upper auxiliary carriage (15) is coupled to the upper main carriage (13) and pulls out the belt loop (20) in the counter belt (11). The lower auxiliary carriage (16) is coupled to the lower main carriage (14) and pulls out the belt loop (20) in the infeed belt (10).

The auxiliary carriages (15, 16) are arranged above the discharge belt (23). The one upper auxiliary carriage (15) is arranged with its tape loop (20) above the shielding device (3). The other auxiliary carriage (16) is arranged with its tape loop (20) below the shielding device (3). It moves in a space between said main carriages (13,14).

For the main and auxiliary carriages (13,14,15,16) and the laying belts (110,11) there is a drive device with separate or partly common drive components. These have e.g. controllable drives, e.g. electromotive servo drives or electric linear motors.

The fleece layer (1) has the aforementioned shielding device (3). This can be installed during the laying process or retrofitted to an existing fleece layer (1). The shielding device (3) has a protective function for the card web (2) that is moved and fed on the laying belt (10) to the upper main carriage or upper carriage (13). Figure 9 shows a simplified and abstract representation of the fleece layer (1) and the shielding device (3) described below.

The shielding device (3) has a housing (25) which, in the installation position shown, has the side surfaces (4) extending along the web direction (7) of the on the Laying tape (10) located card web (2) covers and shields against external environmental influences, in particular air currents. The housing (25) also covers, at least in some areas, the upper side (5) of the card web (2) and thus all free surfaces of the card web (2) located on the laying belt (10). The card web (2) lies with its underside (6) on the laying belt (10). The side surfaces (4) are located on the longitudinal edges of the card web (2).

The housing (25) covers the card web (2) located on the laying belt (10) on at least one side, in particular on the upper side (5), preferably on all free sides or surfaces at a distance. The housing (25) shown has, for example, a hood-like shape and a wall (26) which is impermeable to external environmental influences, in particular air currents. In the installed position, the housing (25) adjoins the laying belt (10) closely, in particular at its longitudinal edges. Here, the aforementioned shielding channel is formed by the housing (25) and the laying tape (10).

The housing (25) extends in the direction of the web (7) along the laying belt (10) and the card web (2) lying thereon and along the travel path of the upper main carriage, in particular the upper carriage (13). The directions of extension can run parallel. You are preferred straight.

The housing (25) extends from the feed-side end region (9) in the direction of the track (7) to the upper main carriage or superstructure (13) and possibly over this. The housing (25) is arranged above the said main carriage (13).

The feed-side end of the housing (25) is located in an undisturbed area of the fleece layer (1) and outside the travel routes of the carriages (13,14,15,16). The The machine frame (8) has, for example, a yoke-like shape that bridges the discharge belt (23) with upright, edge-side uprights and connecting longitudinal members and the carriage guides (17). The housing (25) can end on the supply side at the inner edge of the upright there and at the edge of the end region (9). It can also extend further counter to the web direction (7) into the end region (9).

The upper main carriage or superstructure (13) moves back and forth on its travel path between end positions (41, 42). One end position (41) is furthest away from the feed-side end region (9). she is in Figure 1 and 4th shown. The end position (41) is outside the distant edge of the discharge belt (23). The other end position (42) is arranged closest to the feed-side end region (9). she is in Figure 2 , 3 and 9 shown and is located approximately in the middle above the discharge belt (23).

The other end of the housing (25) is, for example, above the most distant end position (41). The housing (25) overlaps the entry point (22) at which the card web (2) fed on the laying belt (10) enters the said upper main carriage (13) or upper carriage. How Figure 4 clarified, the housing (25) extends to the rear edge of the said main carriage (13) and possibly a little beyond it. It can also cover the other laying belt or counter belt (11), which is fed in at the top of said main carriage (13), for example. The housing (25) can end close to a stationary deflection (19) for the other laying belt (11).

The housing (25) can have open end faces. The end faces can alternatively be closed except for an entry area for the card web (2) and possibly the laying belt (10).

The housing (25) is designed, for example, like a box. It can have a substantially C-shape in cross section. The wall (26) can have a rounded and / or prismatic shape in cross section. The wall (26) can be solid and opaque. Alternatively, transparent areas, e.g. windows, can be arranged at one or more locations. The shielding effect and the airtightness of the wall (26) are not impaired.

The housing (25) and its wall (26) are arranged in the installed position in the fleece layer (1) in such a way that they interact with the laying belt (10) on their underside and are in sealing engagement therewith. The housing (25) is in particular in a continuous sealing engagement with the longitudinal edges of the laying tape (10) over the length. The housing (25) can overlap the longitudinal edges of the laying tape (10) transversely to the direction of the web (7).

The housing (25) has a different engagement with the laying belt (10) over its length or in the direction of the web (7). The housing (25) is divided over its length into partial areas (46, 47). In a first partial area (46) it engages under the laying tape (10), in particular its longitudinal edges. In another, subsequent partial area (47), the housing (25) overlaps the laying tape (10) or its longitudinal edges. The first sub-area (46) with the lower handle extends from the feed-side end area (9) to the end position (42) of the upper main carriage (13) or upper carriage which is closest to the end area (9). This sub-area (46) lies outside the main carriage track. The further sub-area (47) with the overlap extends from the closest end position (42) to the distant end position (41) of the upper main carriage (13) or

Superstructure and possibly beyond.

At the transition point (48) between the first and the following or second sub-area (46, 47), a support means (21), for example a freely rotatable support roller, can be provided for the laying tape (10) with the card web (2) on it . At the transition point (48), there is a change from under-reach to over-reach of the housing (25) on the laying belt (10). The transition point (48) is arranged in the region of an end position (42) of the upper main carriage (13) or upper carriage which is closest on the supply side.

The sub-area (47) with the overlap of the housing (25) is located in the area of the travel path of the upper main carriage (13) or upper carriage. The laying belt (10) is stretched and supported between a deflection means (19) arranged at the feed-side end region (9) and a deflection means (19) arranged at the entry point (22) and movable with the said main carriage (13). The deflection means (19) can be designed, for example, as rotatable deflection rollers or in some other way. The laying tape (10) can be unrolled and rolled on relative to the housing (25) along the said main carriage travel path. In the case of a travel movement directed towards the feed-side end region (9) and against the direction of the web (7), the laying tape (10) is unrolled and released from the overlap of the housing (25). In the opposite movement, the laying tape (10) is rolled onto the housing (25) and brought into contact with the overlap.

The wall (26) of the housing (25) has side walls (28, 29) which extend along the web direction (7) and which preferably extend over the entire length of the housing (25). The housing (25) also has a roof wall (30) which is close to the upper edge of the side walls (28,29) follows. The roof wall (30) can extend over the entire length of the housing (25). Alternatively, it can only have a partial extension. For example, it can end at a distance in front of the feed-side end of the housing (25). Figure 1 , 2 and 6th show this shortened arrangement. The roof wall can also be missing.

The wall (26) has a lower wall (31) which adjoins the side walls (28, 29) and laterally overlaps the laying tape (10), in particular its longitudinal edges. A sealing and possibly largely force-free contact or a small distance can exist at the overlapping points. The side, roof and lower walls (31) together form the wall (26). In the case of a C-shaped cross section, there is a free space or slot (49) between the lower walls (31). The slot width can be adapted to the width of the card web (2). Figures 5 and 6 show this training, the roof wall (30) in Figure 5 is not shown.

Said under-reach or over-reach is formed by the lower walls (31) on both sides. These are divided in the longitudinal direction or direction of the web (7) into wall sections (32, 33) with different heights and a height difference (h). The subdivision corresponds to the sub-areas (46, 47). The transition point between the wall sections (32, 33) can also be arranged on the support means (21).

The wall section (32) of the lower walls (31) on both sides located in the first partial area (46) engages under the longitudinal edge of the laying tape (10). In the other partial area (47), the lower walls (31) on both sides of the other wall section (33) each overlap the longitudinal edge of the laying tape (10). Figure 7 and 8th illustrate this arrangement. Figure 7 shows the transition point between the partial areas (46, 47) and wall sections (32, 33) in perspective and partially broken view. Figure 7 also illustrates the aforementioned distance between the cardboard web (2) and the housing (25).

In the wall section (32) with the underhand grip, the laying tape (10) rests in the overlapping area on the respective lower wall (31). The side surfaces (4) of the card web (2) located on the laying belt (10) are spaced a little from the respective adjacent side wall (28, 29) and have no physical contact with the housing (25). The upward distance between the top (5) and the roof wall (30) is greater than the aforementioned lateral distance. The shielding channel is formed here by the side walls (28, 29) and possibly the roof wall (30) of the housing (25) and the laying tape (10), which rests sealingly on the lower walls (31).

In the wall section (33) with the overlap, the lower walls (31) on both sides rest on the laying tape (10) in the overlapping area and are also laterally spaced from the card web (2). The card web (2) is arranged on the laying belt (10) in the free space or slot (49) between the lower walls (31) on both sides. Their side surfaces (4) are covered by lower walls (31). The shielding channel is formed here by the housing (25) and the laying tape (10) which lies tightly against its underside and the lower walls (31).

Figure 8 illustrates this arrangement of the lower walls (31) in the wall sections (32, 33) in section. At the contact area with the laying tape (10) in the under- and over-reach, the lower walls (31) can each have a sealing and sliding covering (34). The covering (34) can also be resilient. The covering (34) can be a foamed plastic, for example.

Figures 4 to 7 illustrate the support means (21) and its position. The support means (21) can be arranged and supported on the shielding device (3) and / or on the fleece layer (1). It is located close to the end position (42) closest to the end region (9) and is at a distance from the entry point (22) and the deflecting means (19) there counter to the direction of the web (7). As a result, at least part of the housing (25) in the wall area (33) is always in overlapping contact with the laying belt (2).

The partial areas (46, 47) of the housing (25) can have common and continuous side walls (28, 29). You can alternatively according to Figures 5 to 8 each have their own side walls (28,29). These can overlap each other at the transition point or can be spaced in the web direction (7) with the formation of a gap, the gap being closed in a suitable manner, for example by part of the support means (21).

The housing (25) has a support device (36) which is used for the stationary arrangement of the housing (25) in the fleece layer (1). The support device (36) can have different designs. Figures 4 to 8 show an embodiment.

The support device (36) has a support frame (37) for the wall (26) and support arms (38) for fastening the support frame (37) to the fleece layer (1). The supporting frame (37) has according to Figures 5 to 8 Longitudinal beams which are firmly connected to the transversely directed support arms (38). Support arms (38) directed transversely to the web direction (7) for a wall panel lying on top are arranged on the longitudinal beams. The support arms (38) and the wall panel form the roof wall (30). On the other hand, the side walls (28, 29) are suspended from the side members. The lower walls (31) on both sides are, for example, as an angle profile (35) educated. The lower, transverse leg of the angle profile (35) forms the overlap and at least regional support for the laying tape (10). The upright leg of the angle profile (35) rests on the respective side wall (28, 29) and can be detachably fastened here, if necessary.

For the support means (21), upright support arms (39) can be provided, which are also suspended from the longitudinal members of the support structure (37).

The housing (25) and its wall (26) can be adjustable. An adjusting device (40) can be provided for this purpose. With the adjusting device (40), the lower walls (31) can be height-adjustable mounted on the respective side wall (28, 29), e.g. by means of screw connections with elongated holes. The height position and the height difference (h) of the lower walls (31) on the wall sections (32, 33) can be set differently via the adjusting device (40) to form the underhand grip and the overlap.

Figures 5 to 8 illustrate the different altitudes. The lower walls (31) and the height difference (h) can be adapted to the respective laying belt (10), in particular to its thickness. The setting and adaptation can take place in such a way that the lower walls (31) rest on the first wall section (32) on the underside of the laying belt (10) and the lower walls (31) rest on the upper side of the laying belt (10) on the following wall section (33) .

From a procedural point of view, in a non-woven layer (1) a moving card web on a laying belt (10) is fed to an upper movable main carriage (13), in particular an upper carriage, in the web direction (7), the side surfaces (4 ) the on the card web (2) located on the laying tape (10) are covered and shielded from external environmental influences, in particular air currents. This is done by means of a housing (25) of a shielding device (3).

Said card web (2) is preferably covered on all of its free surfaces (4, 5) and shielded against external environmental influences, in particular air currents. In one embodiment, the card web (2) located on the laying belt (10) is covered by the housing (25) without any physical contact and with the formation of a distance. The distance can be present on all sides of the card web (2).

The housing (25) can have a C-shape in cross-section and adjoin the laying tape (10) tightly on the underside, the card web (2) being arranged in the slot-like opening (49) of the C-shape and with the laying tape ( 2) is unrolled or rolled on during a travel movement of the upper main carriage (13) with respect to the housing (25).

Modifications of the embodiments shown and described are possible in various ways. The fleece layer can be designed as a lengthwise layer, in particular as a carriage layer, in which the main carriages arranged one above the other move along the discharge direction of the discharge belt. In the case of a car builder, the laying belts can each be assigned individually to a car. The wall of the housing (25) can be formed at least partially by a wall of the fleece layer (1).

Otherwise, the features of the exemplary embodiments described above and their modifications can be combined with one another in different ways and, if necessary, exchanged within the scope of the claims.

REFERENCE LIST

1

Fleece layer, compensating layer

2

Flag web

3

Shielding device

4th

Side face

5

Top

6th

bottom

7th

Web direction

8th

Machine frame

9

End area

10

Laying belt, infeed belt

11

Laying tape, counter tape

12th

Feed device, feed belt

13th

Main carriage, superstructure

14th

Main carriage, laying carriage

15th

Auxiliary car, tension car

16

Auxiliary car, tension car

17th

Carriage guidance

18th

Drive device

19th

Deflection means, deflection pulley

20th

Tape loop

21

Support means, support role

22nd

Entry point

23

Discharge belt

24

fleece

25th

Enclosure

26th

Wall

27

inner space

28

Side wall

29

Side wall

30th

Roof wall

31

Undercutting

32

Wall section

33

Wall section

34

Covering

35

Angle profile

36

Carrying device

37

Shoring

38

Support arm

39

Support arm for support roller

40

Adjusting device

41

End position removed

42

End position closest

43

Feed direction

44

Discharge direction

45

Pressure roller

46

Sub-area

47

Sub-area

48

Transition point

49

Free space, slot

H

Height difference

Claims (15)

Shielding device for a moving card web (2) in a fleece layer (1), in particular a cross-stacker, the card web (2) having an underside (6), an upper side (7) and side surfaces (4) located on their longitudinal edges and with the underside ( 6) is fed lying on a laying belt (10) of the web layer (1) to an upper movable main carriage (13), in particular an upper carriage, in the web direction (7), characterized in that the shielding device (3) has a housing (25), which is designed and arranged in the web layer (1) in such a way that it covers the side surfaces (4) of the card web (2) located on the laying belt (10) and fed to the upper movable main carriage (13), extending along the web direction (7) and shields against external environmental influences, in particular air currents. Shielding device according to Claim 1 or 2, characterized in that the housing (25) has a wall (26) impermeable to external environmental influences, in particular air currents, the upright and longitudinally extending side walls (28, 29) and one on the side walls (28, 29) in each case has an adjoining lower wall (31) which the laying tape (10), in particular its longitudinal edges, can laterally overlap. Shielding device according to one of the preceding claims, characterized in that the housing (25) is designed like a box and has a substantially C-shape in cross section. Shielding device according to Claim 2 or 3, characterized in that the housing (25) is subdivided in the longitudinal direction into partial areas (46, 47) which are arranged one behind the other, with different wall sections (32, 33) on the partial areas (46, 47) Lower wall (31) are formed, the wall sections (32, 33) having different heights and the housing (25) reaching under the laying tape (10) in a first sub-area (46) and being able to reach over in another subsequent sub-area (47). Shielding device according to Claim 2, 3 or 4, characterized in that a support means (21), in particular a rotatable support roller, for the pile-guiding laying tape (10) is arranged at a transition point (48) between the partial areas (46, 47). Shielding device according to one of the preceding claims, characterized in that the housing (25) has a support device (36) which is designed for a stationary arrangement of the housing (25) in the fleece layer (1). Shielding device according to one of the preceding claims, characterized in that the housing (25) is designed to be adjustable in its dimensions, in particular in height. Fleece layer, in particular cross-stacker, with several, in particular two main carriages (13, 14), and with at least one over the one upper main carriage (13), in particular upper carriage, guided and continuously driven laying belt (10, 11), with one Laying belt (10) a card web (2) is fed to the movable main carriage (13), in particular the upper carriage, in the web direction (7), the card web (2) having an underside (6), an upper side (7) and side surfaces located on their longitudinal edges (4) and with the underside (6) on the laying belt (10), the main carriages (13,14) being movable over a discharge belt (23) and the card web (2) on the discharge belt (23) to form a lay down single-layer or multi-layer fleece (24), and wherein the fleece layer (1) has a shielding device (3) for the moving card web (2) on the laying belt (10), characterized in that the shielding device (3) according to one of claims 1 to 7 and covers the side surfaces (4) extending along the web direction (7) of the card web (2) located on the laying belt (10) and fed to the upper movable main carriage (13) and shields them from external environmental influences, in particular air currents. Fleece layer according to claim 8, characterized in that the housing (25) in the fleece layer (1) extends from a feed-side end region (9) of the fleece layer (1) to an upper main carriage (13), in particular an upper carriage, and possibly beyond . Nonwoven layer according to claim 8 or 9, characterized in that the housing (25) is subdivided in the longitudinal direction into partial areas (46, 47), the housing (25), viewed in the web direction (7), the laying belt (46) in a first partial area (46). 10), in particular its longitudinal edges, engages below and, in another partial area (47), the laying tape (10), in particular its longitudinal edges, overlapping and thereby covering the side surfaces (4) of the card web (2) located on the laying tape (10). Fleece layer according to claim 8, 9 or 10, characterized in that a transition point (48) is arranged between the partial areas (46, 47) in the area of an end position (42) of the travel path of one main carriage (13), in particular the upper carriage, which is closest on the feed side. Non-woven layer according to claim 10 or 11, characterized in that the sub-area (46) with the undergrip of the housing (25) on the laying belt (10) is arranged in an area outside the travel path of the upper main carriage (13), in particular the upper carriage, and the sub-area (47) is arranged with the overlap of the housing (25) on the laying belt (10) in an area within the travel path of the upper main carriage (13), in particular the upper carriage. Fleece layer according to one of claims 8 to 12, characterized in that the fleece layer (1) has one or more movable auxiliary carriages (15, 16) coupled to a main carriage (13, 14), in particular a tension carriage for a tape loop (20) of a laying tape ( 10, 11), wherein an auxiliary carriage (15) with a tape loop (20) is arranged and movable above the shielding device (3) and / or an auxiliary carriage (16) with a tape loop (20) is arranged below the shielding device (3) and is movable. Method for shielding a moving card web (2) in a non-woven layer (1), in particular cross-layer, the card web (2) on a laying belt (10) of the non-woven layer (1) an upper movable main carriage (13), in particular an upper carriage, in the direction of the web (7) is fed, wherein the card web (2) has an underside (6), an upper side (7) and side surfaces (4) located on their longitudinal edges and lies with the underside (6) on the laying belt (10), characterized that the side surfaces (4) extending along the web direction (7) at the longitudinal edges of the card web (2) located on the laying belt (10) and fed to the upper movable main carriage (13) are covered by an enclosure (25) and protect against external environmental influences, especially air currents. Method according to claim 14, characterized in that the housing (25) cooperates with the laying belt (10) and is in an overlapping and preferably sealing engagement with the laying belt (10), in particular with its lateral longitudinal edges, transversely to the web direction (7) , the housing (25) being subdivided into partial areas (46, 47) in the web direction (7), with the laying belt (10), in particular its longitudinal edges, engaging under the housing (25) in one partial area (46) and in another Sub-area (47) is overlapped by the housing (25), the side surfaces (4) of the card web (2) located on the laying tape (10) being covered, and a transition point (48) between the sub-areas (46, 47) in the Area of an end position (42) of the travel path of the one main carriage (13), in particular the upper carriage, which is closest to the supply side.

Images