EP2799381A1 - Fibre guiding textile machine plastic part, textile machine with fibre guiding function components, method for producing a fibre leading textile machine function component and use of a plastic body - Google Patents

Abstract

The invention relates to a fiber-guiding textile machine plastic part (1) for guiding fibers or a thread produced therefrom with a wear-resistant functional surface layer (7) of a chemically deposited layer, wherein the wear-resistant functional surface layer (7) by means of on the surface of the fiber-guiding textile machine plastic part ( 1) cavities with the fiber-guiding textile machine plastic part (1) is particularly intimately connected by positive engagement, and a method for producing the fiber-guiding textile machine functional component and use thereof.

Description

The invention relates to a fiber-guiding textile machine plastic part for guiding fibers or a yarn produced therefrom.

The invention further relates to a textile machine with fiber-guiding functional components.

The invention further relates to a method for producing a fiber-guiding textile machine functional component for guiding fibers or a thread produced therefrom.

The invention also relates to a use of a plastic body with a chemically deposited functional surface layer.

It is known from the prior art to produce a wide variety of fiber-guided textile machine functional components made of metal and, if appropriate, to coat them in order to obtain higher-quality guide surfaces.

The invention has for its object to be able to produce generic fiber-engineered textile machinery functional components cost-effective.

The object of the invention is achieved by a fiber-guiding textile machine plastic part for guiding fibers or a yarn produced therefrom with a wear-resistant functional surface layer of a chemically deposited layer, wherein the wear-resistant functional surface layer by means of cavities produced on the surface of the fiber-guiding textile machine plastic part with the fiber-guiding textile machines Plastic part is particularly intimately connected by positive locking.

Such a fiber-guiding textile machine plastic part does not exist so far.

However, it has been found that inventive fiber-guided textile machine plastic parts can be produced much cheaper than conventional textile machine functional components for guiding fibers or a thread produced therefrom.

Although it is known to refine plastic components with a chemically deposited layer, for example, from the automotive sector to produce optically beautiful and sizable surfaces. However, these surfaces are in no case to withstand a permanently high mechanical stress on industrially used functional components, as is the case with fiber-guiding textile machine functional components.

Thus, the present wear-resistant functional surface layer is not comparable to such an optically beautifying surface layer. Therefore, it is also absurd to use such a chemically deposited layer as a wear-resistant functional surface layer on textile machine functional components for guiding fibers.

In this respect, it is particularly advantageous if a textile machine functional component for guiding fibers or a thread produced therefrom by a fiber-guiding textile machine plastic part with a wear-resistant functional surface layer of a chemically deposited layer is characterized.

This fiber-guided textile machine plastic part is also extremely resistant, since the wear-resistant functional surface layer is particularly intimately connected by positive engagement with the plastic surface. This particularly intimate connection is based on the fact that on the surface of the plastic part prior to the deposition of the chemical layer, a multiplicity of caverns have been produced, into which this chemically deposited layer can at least partially penetrate. Hereby, the advantageous positive connection is produced.

Consequently, the object of the invention is also achieved by using a synthetic material body having caverns on its surface with a functional surface layer which is chemically deposited on the surface and in the caverns and is particularly intimately connected with the plastic body as a fiber-guiding textile machine functional component.

By using a correspondingly shaped and coated plastic body, fiber-guided textile machine functional components can be produced advantageously, for example as a plastic injection-molded component.

In particular, this also existing textile machines can be retrofitted cost.

It will be understood that different materials may be used to produce the chemically deposited layer, by means of which a wear resistant functional surface layer may be formed on the fiber-guiding textile machine plastic part.

However, a preferred embodiment provides that the wear-resistant functional surface layer is a chemical nickel layer.

It has been found that a nickel-containing wear-resistant functional surface layer on a fiber-guiding textile machine plastic part can be realized sufficiently hard in order to withstand a permanently high mechanical industrial stress by fibers very well.

For comparison, a chemical copper layer would be too soft to be used here promisingly on a fiber-guiding textile machine plastic part.

A chemical nickel layer is particularly advantageous in view of the fact that subsequent heat treatment, in particular annealing, of the fiber-guiding textile machine plastic part is not possible in order to increase the layer hardness.

Moreover, such a chemico-nickel layer has heretofore been used merely as an intermediate carrier layer for other layers, such as an acid copper layer and / or a glossy nickel layer or the like, but not as a wear-resistant functional surface layer on a fiber-guiding textile machine plastic part textile machine.

In the present case, in particular all suitable nickel alloys can also be used.

A particularly preferred embodiment provides that the wear-resistant functional surface layer is a low-phosphorus-containing nickel phosphorus layer.

Although the present wear-resistant functional surface layer could also be produced by means of a medium phosphorus-containing nickel phosphorus layer. However, with the present low phosphorus nickel phosphorus layer in the chemical deposition process, a particularly hard and thus particularly resistant chemically deposited layer can be achieved on the fiber-guiding textile machine plastic part according to the invention.

And this at a process temperature of only about 70 ° C. Such a relatively low temperature is generally very good for plastic materials, without causing plastic deformation on the plastic component due to temperature. This is important in the present case for a precise leadership function.

In this respect, it is advantageous if the fiber-guiding textile machine plastic part is equipped with a low phosphorus-containing nickel phosphor coating.

The object of the invention is also achieved by a method for producing a fiber-guiding textile machine functional component for guiding fibers or a yarn produced therefrom, in which the fiber-guiding textile machine functional component is produced from a plastic body, and in which caverns on the plastic body in a pickling process be produced and the plastic body is then coated in a low phosphorus solution with a wear-resistant functional surface layer, wherein the wear-resistant functional surface layer is particularly intimately connected by a cavitation caused by the positive connection with the plastic body.

Thus, plastic bodies designed as fiber-conveying textile machines can be coated with a long-lasting phosphorus-containing nickel-phosphorus coating.

By means of the present method, the fiber-guiding textile machine plastic parts according to the invention can easily be produced in larger quantities and at low cost.

It is understood that the plastic parts are previously pretreated accordingly. For example, they are cleaned of dirt and grease.

Subsequently, they are ideally subjected to a pickling process, in particular a chromosulfuric acid treatment, in order to produce corresponding caverns on the surface of the fiber-guiding textile machine plastic part, in which the wear-resistant functional surface layer can be particularly intimately connected by positive engagement with the plastic body.

Furthermore, palladium may preferably be added to the thus prepared surface of the fiber-guiding textile machine plastic part prior to coating in order to favor the coating process of the wear-resistant functional surface layer.

A further preferred embodiment provides that the wear-resistant functional surface layer has a hardness of 700 HV or more.

Previous measurements with a microhardness tester and a test load of HV 0.025 already showed hardnesses of more than 800 HV, whereby hardnesses between 750 HV and 800 HV could always be reliably achieved.

Such Vickers hardnesses (HV) can be achieved consistently with a low-phosphorus nickel phosphorus layer in the chemical deposition process on the fiber-guiding textile machine plastic part consistently, which sufficiently stable and durable fiber-bearing textile machine plastic parts can be provided.

A long-lasting functional capability of the wear-resistant functional surface layer on the fiber-guiding textile machine plastic part can be ensured particularly reliably if the wear-resistant functional surface layer has a layer thickness of more than 8 μm or more than 10 μm. In addition, such a layer thickness promotes good corrosion resistance.

If the wear-resistant functional surface layer has a layer thickness of less than 30 μm or less than 20 μm, the production costs with regard to the wear-resistant functional surface layer can be kept lower.

Preferably, a layer thickness of on average 18 microns is desired in order to obtain very good wear properties can.

It is understood that the fiber-guiding textile machine plastic part can be realized with almost all plastics or a compound thereof.

In this context, it is advantageous if the fiber-guiding textile machine plastic part has a plastic body of acrylonitrile-butadiene-styrene, ABS for short. Especially in ABS cavities for a very intimate connection between the plastic part and the wear-resistant functional surface layer of a chemically deposited layer can be produced particularly well. In this sense, very useful ABS are also often referred to as Galvano-ABS.

For example, the present fiber-guiding textile machine plastic part consists of an ABS P40.

It is understood that polycarbonate mixtures and also other plastics, such as polyamide, can be used here.

The fiber-guiding textile machine plastic part may, for example, be a fiber channel element, a spoiler element, an adapter element or the like of a textile machine.

From a manufacturing point of view, it seems most sensible to coat the entire fiber-guiding textile machine plastic part with the wear-resistant functional surface layer from a chemically deposited layer.

However, it is quite sufficient if in particular only or exclusively a guide surface area for guiding fibers or a yarn produced therefrom of the present fiber-guiding textile machine plastic part with the wear-resistant functional surface layer is provided or coated to the desired effect of good mechanical resistance at the fiber-leading To achieve textile machine plastic part.

In this respect, it is advantageous if a fiber guide surface area for guiding the fiber is coated with the wear-resistant functional surface layer.

An embodiment variant that is advantageous in this respect provides that the fiber guiding surface area is configured in the shape of a channel.

In this case, the fiber guide surface area can be channel-shaped or open-channel-shaped in the direction of its longitudinal extent.

For example, the channel-shaped fiber guide surface area is round, oval, or rectangular in cross-section, in order to be able to guide fibers accordingly.

In addition, the channel-shaped fiber guide surface area may be straight or curved in the direction of its longitudinal extent.

In any case, it is advantageous if fiber guide surface regions directed towards one another on the fiber-guiding textile machine plastic part are designed with the wear-resistant functional surface layer, so that the fiber-guiding textile machine plastic part is sufficiently well protected against mechanical stress caused by fibers.

In this respect, in the present case, the fiber-guiding functional component is designed to be very wear-resistant on its insides by precisely this low-phosphorus-containing nickel phosphorus layer.

It is understood that depending on application requirements, the fiber-guiding textile machine plastic part may also have further layers, which may be arranged in particular between the plastic body and the outer low-phosphorus nickel phosphorus layer.

The object of the invention is also achieved by a textile machine with fiber-guiding functional components for guiding fibers or a yarn produced therefrom, in which the fiber-guiding functional components comprises a fiber-guiding textile machine plastic part according to one of the features described herein.

The textile machine is, for example, a rotor spinning machine.

In the case of the multiplicity of fiber-guiding textile machine functional components used or installed on a textile machine, a correspondingly high cost reduction can be achieved by using the fiber-guiding textile machine plastic parts according to the invention.

Further advantages, objects and features of the present invention will be elucidated with reference to the attached drawings and the following description, in which an example of a rotor spinning machine associated fiber channel part made of plastic with a wear-resistant functional surface layer of a low phosphorus nickel phosphorus layer is shown and described.

Figur 1

schematisch eine Seitenansicht eines Faserkanalteils aus Kunststoff mit einer verschleißbeständigen Funktionsoberflächenschicht aus einer niedrigphosphorhaltigen Nickelphosphor-Schicht für eine Rotorspinnmaschine; und

Figur 2

schematisch eine teilweise dargestellte Rückansicht des Faserkanalteils aus der Figur 1.

In the drawing show:

FIG. 1

schematically a side view of a fiber channel part made of plastic with a wear-resistant functional surface layer of a low phosphorus nickel phosphorus layer for a rotor spinning machine; and

FIG. 2

schematically a partially illustrated rear view of the fiber channel part of the FIG. 1 ,

In the in the Figures 1 and 2 shown fiber-guiding textile machine plastic part 1 is a fiber channel part 2 for guiding fibers, not shown here.

In this respect, the fiber-guiding textile machine plastic part 1 is used on a textile machine 3 as a fiber-guiding textile machine functional component 4.

The textile machine 3, which is only indicated here, is in particular a rotor spinning machine 5.

Since such textile machines 3 and the functions of related fiber channel parts 2 are well known, a detailed functional description of the textile machine 3 is omitted here.

It should already be mentioned at this point that the fiber channel part 2 is only a first possible embodiment of a fiber-guiding textile machine plastic part 1. Rather, those described in this context Features, effects and benefits also be transferred to other fiber-optic textile machinery functional components 4.

The fiber channel part 2 has a plastic body 6 made of an acrylonitrile-butadiene-styrene, ABS for short, whose surface has been treated in such a way that a large number of caverns are formed on the surface. The ABS used in this embodiment is ABS P40.

This plastic body 6 is holistically coated in this embodiment with a wear-resistant functional surface layer 7.

The wear-resistant functional surface layer 7 is a chemico-nickel layer 8, which has been applied by means of a low-phosphorus bath especially as a low-phosphorus nickel phosphorus layer 9.

This low-phosphorus nickel phosphorus layer 9 is particularly intimately connected to the surface of the plastic body 6, since it has at least partially penetrated into the existing caverns. Thus, there is a very good and intimate form-fitting connection between the plastic body 6 and the low-phosphorus nickel phosphorus layer 9.

The wear-resistant functional surface layer 7 in this exemplary embodiment has a layer thickness of on average 18 μm with a Vickers hardness of 750 HV to 800 HV.

The plastic body 6 of the fiber channel part 2 is characterized in particular by the fact that he designed a tapered fiber channel 10.

This fiber channel 10 extends from a rear end 11 of the fiber-guiding textile machine plastic part 1 tapering to a front end 12 of the fiber-guiding textile machine plastic part 1 and thus extends along the longitudinal extension 13 of the fiber-guiding textile machine plastic part. 1

In particular, according to the illustration according to the FIG. 2 seen from the direction of the rear end 11 seen at the front end a smaller opening 14 than the larger opening 15 at the rear end eleventh

It is crucial that the fiber-guiding textile machine plastic part 1 is coated at its essential fiber guide surface region 16 on its inner sides with the wear-resistant functional surface layer 7, and this essential fiber guide surface region 16 is located in the tapered fiber channel 10th

In this exemplary embodiment, however, the fiber-conveying textile machine plastic part is completely covered by the production process of the low-phosphorus nickel phosphorous layer 9.

However, with proper process control, the wear resistant functional surface layer 1 could be limited to only the substantial fiber guide surface area 16 within the tapered fiber channel 10.

It is understood that the exemplary embodiment explained above is merely a first embodiment of the fiber-guiding textile machine plastic part 1 according to the invention in the form of a fiber channel part 2. In this respect, the embodiment of the invention is not limited to this embodiment.

All disclosed in the application documents features are claimed as essential to the invention, provided they are new individually or in combination over the prior art.

Claims (13)

A fiber-guiding textile machine plastic part (1) for guiding fibers or a yarn produced therefrom with a wear-resistant functional surface layer (7) of a chemically deposited layer, wherein the wear-resistant functional surface layer (7) by means of cavities produced on the surface of the fiber-guiding textile machine plastic part (1) with the fiber-guiding textile machine plastic part (1) is particularly intimately connected by positive locking. A fiber-guiding textile machine plastic part (1) according to claim 1, characterized in that the wear-resistant functional surface layer (7) is a chemical nickel layer (8). Fiber-guiding textile machine plastic part (1) according to claim 1 or 2, characterized in that the wear-resistant functional surface layer (7) is a low-phosphorus-containing nickel phosphorus layer (9). Fiber-guiding textile machine plastic part (1) according to one of claims 1 to 3, characterized in that the wear-resistant functional surface layer (7) has a hardness of 700 HV or more. Fiber-guiding textile machine plastic part (1) according to one of claims 1 to 4, characterized in that the wear-resistant functional surface layer (7) has a layer thickness of about 8 microns or more than 10 microns. Fiber-guiding textile machine plastic part (1) according to one of claims 1 to 5, characterized in that the wear-resistant functional surface layer (7) has a layer thickness of less than 30 microns or less than 20 microns. Fiber-guiding textile machine plastic part (1) according to one of claims 1 to 6, characterized by a plastic body (6) made of acrylonitrile-butadiene-styrene, ABS for short. Fiber-guiding textile machine plastic part (1) according to one of claims 1 to 7, characterized in that the fiber-guiding textile machine plastic part (1) comprises a fiber channel element (2), a spoiler element, an adapter element or the like. A fiber-guiding textile machine plastic part (1) according to any one of claims 1 to 8, characterized in that a fiber guide surface region (16) for guiding the fibers is coated with the wear-resistant functional surface layer (7). Fiber-guiding textile machine plastic part (1) according to one of claims 1 to 9, characterized in that the fiber guide surface region (16) is designed channel-shaped. Textile machine with fiber-guiding functional components (1) for guiding fibers or a thread produced therefrom, characterized in that the fiber-guiding functional components (4) comprises a fiber-guiding textile machine plastic part (1) according to one of the preceding claims. Method for producing a fiber-guiding textile machine functional component (4) for guiding fibers or a thread produced therefrom, characterized in that the fiber-guiding textile machine functional component (4) is produced from a plastic body (6), on which the plastic body (6) caverns are produced in a pickling process and the plastic body (6) is subsequently coated in a solution containing low phosphorus with a wear-resistant functional surface layer (7), the wear-resistant functional surface layer (7) being particularly intimately connected to the plastic body (6) by means of a cavitation-related positive connection becomes. Use of a generated on its surface cavities plastic body (6) with a on the surface and in the cavities chemically deposited and by positive engagement with the plastic body (6) particularly intimately connected functional surface layer (7) as a fiber-guiding textile machine functional component (4).

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