Output conveyor belt of cross lapping machine
阅读说明:本技术 交叉铺网机的输出传送带 (Output conveyor belt of cross lapping machine ) 是由 约翰·菲利普·迪罗 于 2019-08-28 设计创作,主要内容包括:交叉铺网机(2)的输出传送带(4),用于支承和传送铺设的棉网层(5)以形成非织造物(3),该输出传送带被构造成具有多个横向板条(20)的循环板条带。横向板条(20)包括用于非织造物(3)的支撑表面(22),其由从横向板条(20)突出的纤维(32)或刚毛(34)形成。(An output conveyor belt (4) of the cross lapper (2) for supporting and conveying a laid fleece layer (5) to form a nonwoven (3), is configured as an endless slat with a plurality of transverse slats (20). The transverse slats (20) comprise a support surface (22) for the nonwoven (3), which is formed by fibres (32) or bristles (34) protruding from the transverse slats (20).)
1. An output conveyor belt (4) of a cross lapper (2) for supporting and conveying a layer of laid fleece (5) to form a nonwoven (3),
wherein the output conveyor belt (4) is configured as an endless slat belt with a plurality of transverse slats (20), wherein the transverse slats (20) comprise a support surface (22) for the nonwoven (3),
and wherein at least some areas of the support surfaces (22) of at least some of the transverse slats (20) are formed by fibres (32) or bristles (34) protruding from the transverse slats (20).
2. The output conveyor belt (4) according to claim 1, wherein the transverse slats (20) are at least partially covered by a covering (24) comprising protruding fibers (32) or bristles (34).
3. The output conveyor belt (4) of claim 2, wherein the cover (24) includes a base layer (26) from which the fibers (32) or bristles (34) protrude.
4. The output conveyor belt (4) of claim 3, wherein the fibers (32) protrude from the base layer (26) a distance in the range of 0.5mm to 5 mm.
5. An output conveyor belt (4) as claimed in claim 2, wherein said cover (24) is formed of a fleece fabric with protruding fibers (32).
6. The output conveyor belt (4) according to claim 5, wherein said pile fabric is velvet or velour.
7. The output conveyor belt (4) according to claim 3, wherein the fibers (32) are applied to the base layer (26) in the form of fiber flocking.
8. The output conveyor belt (4) of claim 3, wherein the base layer (26) comprises at least one adhesive layer.
9. The output conveyor belt (4) of claim 2, wherein each transverse slat (20) is covered by the cover (24).
10. An output conveyor (4) according to claim 2, wherein every second or every third transverse slat (20) is covered by said covering (24).
11. The output conveyor belt (4) according to claim 1, wherein the transverse slats (20) are fitted with the fibers (32) or the bristles (34) over the entire width of the output conveyor belt (4).
12. The output conveyor (4) according to claim 2, wherein the transverse slats (20) comprise a covering (24) in an outer region of the output conveyor (4), while the transverse slats (20) are not covered by the covering (24) in an intermediate region.
13. The output conveyor belt (4) according to claim 12, wherein the intermediate area where the covering (24) is not provided extends not more than 70% of the width of the output conveyor belt (4).
14. The output conveyor belt (4) according to claim 12, wherein the intermediate area where the covering (24) is not provided extends not more than 60% of the width of the output conveyor belt (4).
15. The output conveyor belt (4) according to claim 12, wherein the intermediate area where the covering (24) is not provided extends not more than 50% of the width of the output conveyor belt (4).
16. The output conveyor belt (4) according to claim 1, wherein said bristles (34) are in the form of bundles of bristles.
17. The output conveyor belt (4) of claim 16, wherein the bristles (34) are directly attached to the transverse slats (20).
18. An output conveyor belt (4) according to claim 1, wherein a cleaning device is arranged in the area of the output conveyor belt (4) to remove adhering fibres of the nonwoven (3).
19. An output conveyor belt (4) according to claim 18, wherein said cleaning means comprise brush rollers and/or suction means.
Technical Field
The present invention relates to an output conveyor belt for a cross lapper (crosslapper).
Background
In the production of nonwovens in cross lappers, several layers of cotton webs (card webs) entering the cross lapper are laid on top of each other on an output conveyor belt which is movable in a direction perpendicular to the direction of the laying carriage. Since the movement of the laying carriage and the movement of the output conveyor are perpendicular to one another, the edges of the layers of fleece in the laid nonwoven on the output conveyor are slightly inclined. In general, several layers of fleece are laid down on top of each other in a zigzag manner, thus forming a nonwoven consisting of these several layers of fleece.
As a varying requirement, it may be desirable for the web to be stretched intentionally upstream from the cross-lapper, or as it passes through the cross-lapper. For example, it is advantageous as a method of laying a thinner part of the fleece in the region of the side edges of the laid nonwoven, which results in a more uniform nonwoven after the curing step. Nevertheless, the deformation results in a certain level of internal stress in the material due to the elastically stored strain of the fleece. These internal stresses can cause the laid nonwoven to distort; for example, they can cause the recently laid fleece layer to elastically contract, which has the effect of reducing the established width. Especially at the rear edge of the recently laid web layer, some of the web may fall directly onto the transverse slats (slat) of the output conveyor. This is where the effect is particularly noticeable.
Disclosure of Invention
The object of the invention is to provide an output conveyor belt of a cross lapper, which can effectively counteract the shrinkage of the laid nonwoven caused by internal stresses in the nonwoven, while gently handling the laid nonwoven and releasing it again with as little residue as possible during its transfer from the output conveyor belt to the downstream conveyor.
According to one aspect of the invention, the output conveyor of a cross lapper for supporting and conveying a laid-down web layer to form a nonwoven is configured as an endless (loop) board strip having a plurality of transverse slats. The transverse slats comprise a support surface for the nonwoven, wherein at least some areas of the support surface of at least some of these transverse slats are formed by protruding fibres or bristles (bristles).
In this configuration, it ensures that the laid edges of the cotton net layer do not shrink with the laid nonwoven. Meanwhile, the scratch caused by the smooth and sensitive surface of the laying belt of the cross lapping machine, which is locally contacted with the output conveying belt, is avoided. Finally, as a result of the increased friction and interlocking forces between the nonwoven and the output conveyor, it is ensured that the dimensional stability of the nonwoven is guaranteed until the nonwoven is passed to the next conveyor.
The transverse slats are preferably at least partially covered by a covering comprising protruding fibres or bristles.
The cover also preferably includes a base layer from which the fibers or bristles protrude.
Preferably, the fibres protrude from the substrate layer by a distance in the range 0.5mm to 5mm, more preferably in the range 1.0mm to 4.0 mm.
The cover is preferably formed of a pile fabric with protruding fibers. In a preferred embodiment, the pile fabric is velvet or velour.
In an alternative embodiment, the fibers can be applied to the substrate layer in the form of a flocking of the fibers.
The base layer can include at least one adhesive layer such that the base layer can be easily attached to the transverse slats.
In a preferred embodiment, each transverse slat is covered by a covering. Alternatively, only every second or every third transverse slat is covered by a covering.
In a first variant, the transverse slats are fitted with fibres or bristles over the full width of the output conveyor.
In an alternative variant, these transverse slats comprise a covering in the outer region, but the middle region of the transverse slats is not covered by a covering. This is sufficient because the distortion occurs mainly at the edges of the laid nonwoven web. In the event that shrinkage of the nonwoven at the edges is prevented, the middle area of the laid nonwoven web is thus also held in place.
This intermediate area without covering preferably extends not more than 70% of the width of the output conveyor belt, more preferably not more than 60% of the width of the output conveyor belt, and even more preferably not more than 50% of the width of the output conveyor belt.
In addition to the embodiment with a covering on the transverse slats, bristles in the form of bristle tufts can also be provided, and for these bristles in the form of bristle tufts are preferably attached directly to the transverse slats.
In a preferred embodiment, a cleaning device for removing the adhering nonwoven fibers is arranged in the region of the output conveyor belt. Due to the relatively high friction and interlocking forces of the output conveyor belt, the fibers of the nonwoven can continue to adhere to the fibers or bristles on the output conveyor belt even after the nonwoven has been transferred from the output conveyor belt to the downstream conveying unit. It is therefore necessary to remove the attached fibers of the nonwoven so that the output conveyor can provide the desired holding force to the nonwoven during the next laying process on these transverse slats.
In a preferred embodiment, the cleaning device can comprise a brush roller and/or a suction device.
Drawings
FIG. 1 shows a schematic side view of a cross-lapper with an embodiment of an output conveyor belt according to the invention;
FIG. 2 shows a schematic top view of an output conveyor belt with undesirable shrinkage of the edges of the nonwoven being illustrated diagrammatically;
FIG. 3 shows a perspective view of a portion of an upper run of an embodiment of an output conveyor belt according to the invention;
FIG. 4 is a cross-sectional view of the configuration of the transverse slats of the output conveyor with the covering as in FIG. 3; and
FIG. 5 is a cross-sectional view of an alternative configuration of the transverse slats of the output conveyor with bristle tufts.
Detailed Description
Fig. 1 shows a schematic view of a
The movement of laying carriage 6 and
According to the exemplary embodiment shown in fig. 1, there are three fleece conveyors in addition to the output conveyor 4 in the
Common to all
During the laying down of the
However, according to the invention, it would be desirable to modify the configuration as shown in fig. 2 so that all the cotton
A first embodiment of an output conveyor belt 4 according to the invention for this purpose is shown in fig. 3 and 4. Another embodiment is shown in fig. 5.
Fig. 3 shows the upper run of the endless output conveyor 4. The output conveyor 4 is constructed as an endless strip of
The
Finally, it is conceivable that the covering 24 may be present in the outer regions of the
In other embodiments, not every
The output conveyor belt 4 is typically connected to at least one drive roller (not shown) by a toothed engagement and also passes around a turn roller. In the area outside the nonwoven laying section of the output conveyor belt 4, preferably in the area of the lower run of the output conveyor belt 4, a cleaning device (not shown) for cleaning the
The
In many cases, the covering 24 thus includes fibers 32, possibly in the form of filaments or yarns, that extend from the base layer 26 and project in three dimensions. In a particularly preferred embodiment, the material of the
It is also contemplated that the
Finally, it is also contemplated that the protruding fibers 32 could be applied to the base layer 26 in a fiber flocking manner. In this case, plastic, wood, metal or textile layers can be considered as substrate materials.
All of the fibers 32 are staple fibers that protrude from the base layer 26 a distance in the range of 0.5mm to 5mm, preferably in the range of 1.0mm to 4.0 mm.
However, longer bristles are generally contemplated, which protrude from the base layer 26 a distance in the range of 5mm to 50 mm.
Fig. 4 shows an example of one possible way in which the
It will be apparent to those skilled in the art that many other options for attaching the covering 24 to the
Fig. 5 shows an alternative embodiment of the
The
- 上一篇:一种医用注射器针头装配设备
- 下一篇:一种物流无人机用装卸货装置