阅读说明：本技术 生产针刺非织造布的设备 (Apparatus for producing needle-punched non-woven fabric ) 是由 齐格弗里德·本哈特 福尔克马尔·舒尔茨 于 2020-02-18 设计创作，主要内容包括：本发明涉及一种用于生产针刺非织造布的设备；这使得能够在生产过程中在非织造布厚度和/或非织造布宽度上将不同的材料引入到各个层中。(The invention relates to a device for producing a needle-punched non-woven fabric; this makes it possible to introduce different materials into the individual layers in the production process over the thickness and/or width of the nonwoven.)

1. An apparatus for producing a multi-layer needled nonwoven having the same or different materials and quantities in nonwoven thickness and/or nonwoven width of each individual layer, characterized in that:

the apparatus comprises spreading means (4, 5, 6, 7) for applying material to at least one or more layers (1, 2) of non-needled or needled web, wherein one or more of said spreading means (4, 5, 6, 7) are located between pick-up conveyors (11, 12) of a carding machine (10).

2. A device according to claim 1, comprising a carding machine (10) with two, three or four pick-up structures.

3. A plant as claimed in claim 1 or 2, comprising two carding machines (10) arranged one after the other, wherein the layers can be laid on a laying device.

4. A plant as claimed in claim 1 or 2, comprising two carding machines (10) and two laying devices arranged side by side.

5. A device according to any one of claims 1 to 4, comprising a controllable and/or switchable spreading means (4, 5, 6, 7) between the two pick-up conveyors (11, 12).

Technical Field

The object of the invention is an apparatus for producing a needle-punched nonwoven, which enables the introduction of identical and different materials into the individual layers of a multi-layer nonwoven via the nonwoven thickness and/or the nonwoven width during the production process.

Specifically, the grammage is in the range of 400 to 1800g/m²The PP/PET, PP/BiCo/PET and PET/BiCo mixed fiber nonwovens of (1) are used as base nonwovens, the applications of which are found in particular in the outer region of motor vehicles.

Background

In the prior art, methods for producing velour carpets are known, see in particular DE 4409771 a1, DE 2900935C 2 and DE 102008026968 a 1.

Carding machines for the production of fibrous webs are described, for example, in US 2018/0051400 a1, WO 2017/178148 a1, US 2016/0362818 a1, DE 102015112777 a1 and DE 102014009339 a 1. In particular, with regard to nonwoven lay-up devices, embodiments can be found in US 3903569, DE 102010050027 a1 and DE 202012102597U 1.

Furthermore, methods for producing so-called regenerated sandwich nonwovens or components are described in the prior art, in which on the one hand pressing techniques (DE 102016202290 a1) and on the other hand needling techniques (DE 102013222403 a1, DE 102016203348 a1) are used.

WO 2012/052535 a1 relates to a method for producing a composite nonwoven in a continuous process sequence and to an apparatus for carrying out the method. In this process, a fibrous web is formed from a stream of fibers by a carding unit, on the surface of which a nonwoven layer of synthetic fibers is subsequently laid. For this purpose, the fibrous web is guided in the suction area on a conveyor belt to a meltblowing device, in which synthetic fibers are laid down on the surface of the fibrous web by meltblowing. Then, the fiber web covered with the nonwoven fabric is laid in multiple layers by a nonwoven fabric laying apparatus to form a composite nonwoven fabric.

The prior art does not describe a method or apparatus for dispersing the same or different materials into the individual layers of a multi-layer nonwoven during the production of the multi-layer nonwoven.

Disclosure of Invention

In contrast to the prior art described above, it is therefore the object of the present invention to provide a device for producing a nonwoven, which makes it possible to disperse the same or different materials and/or quantities as abrasive material and/or fibres and/or flakes and/or powder into the individual layers in the thickness and/or width of the nonwoven during the production thereof and to needle-punch the composite material obtained after the nonwoven has been laid.

In a first embodiment, the object of the invention is an apparatus for producing a multi-layer needled nonwoven having the same or different materials in the nonwoven thickness and/or nonwoven width of the individual layers, characterized in that:

the apparatus comprises spreading means 4, 5, 6, 7 for applying the above-mentioned material to at least one or more non-needled or needled web layers 1, 2, wherein one or more of the spreading means 4, 5, 6, 7 is/are located between the pick-up conveyors 11, 12 of the carding machine 10.

With the aid of the device according to the invention, it is possible to distribute the same or different materials and quantities as abrasive material and/or fibres and/or flakes and/or powder between the webs 1, 2 according to specific acoustic and mechanical requirements, for example a textile wheel cover lining, to achieve possible connections and/or controls of the distribution means 4, 5, 6, 7 according to the type of material and/or quantity of material required,

in order to lay down the webs 1, 2 and the material in between to form a single layer 3,

the layers 3 are laid up into a plurality of layers 9 to form a composite material 8 and the composite material 8 is needle punched.

Detailed Description

In a preferred embodiment, the apparatus comprises a double pick-up carding machine 10 (fig. 1), wherein the spreading devices 4, 5, 6, 7 are arranged between two pick-up conveyor belts 11, 12 and can be controlled and/or switched on differently here.

Fig. 2 shows a multi-pick carding machine with respective spreading devices 13, 14 and 15, 16, 17.

In fig. 3, 2 cards are placed one after the other and the layers are then transferred to a lay-up device. This allows good reciprocity and variability of the dispersed material. With this arrangement, it is also possible to achieve different base nonwoven textures by selectively selecting the individual layers.

Fig. 4 shows the arrangement of 2 cards and 2 laying devices, which are arranged side by side. An advantage of this arrangement is that the same or different spreading materials can be used in terms of the number of layers per lay-up device, and thus at the top or bottom. The distribution of the dispersed material is given, giving the variation of the weight range.

The core of the invention is therefore to provide an apparatus which makes it possible to spread and needle the same or different materials and/or quantities between the fibrous webs in the carding machine as return material and/or fibres and/or flakes and/or powder, depending on the acoustic and mechanical requirements of the components produced from the nonwoven.

The device according to the invention is thus able to achieve spreading as desired by arranging the spreading means 4, 5, 6, 7 between the pick-up structures of the card and controlling them.

The advantage of the present invention is to provide a nonwoven suitable for deformation/stabilization, wherein the performance-influencing layer structure can already be produced by the thickness and/or width of the individual layers during the production thereof.

This eliminates the need for laminating, sewing, etc. the various layers during assembly production, and the time consuming need to replace the roll or blank; no lamination system is required, which is particularly associated with a reduction in cycle time.

Example (b):

to produce a non-woven fabric comprising 8 individual layers which was resistant to deformation/stable, the total weight was 1600g/m²For manufacturing textile wheel coversLining, 150g/m²Glass fibre/panox/PET/BiCo abrasive material added to the first layer-later facing the wheel-150 g/m²Adding a PP/PET/BiCo abrasive material to the second layer after the first layer, adding 150g/m²Adding a PP/PET/BiCo abrasive material to the second layer after the first layer, adding 150g/m²Is placed in the outer eighth layer (which will later face the car body), 150g/m²And glass fiber abrasive material into the underlying seventh layer. The base nonwoven fabric consisted of commercially available 40 wt.% PP and 60 wt.% PET fibers.

For this purpose, a device according to the invention is used with the above-described spreading device.

The fleece is then formed into a wheel arch shell using standard methods [ contact heating field (T200 ℃, T50 seconds; gap width 4mm), tool (T20 ℃, T50 seconds; gap width 3.5 mm) ].

The wheel cover liner has improved properties in terms of stiffness, heat resistance and flammability due to the interspersed and needled materials.