WO2017071801A1

WO2017071801A1 - Knitting machine with a guide channel and a knitting element guided therein

Info

Publication number: WO2017071801A1
Application number: PCT/EP2016/001767
Authority: WO
Inventors: Thomas Liebl
Original assignee: Starke, Michael
Priority date: 2015-10-28
Filing date: 2016-10-25
Publication date: 2017-05-04
Also published as: CN108138401B; PT3368709T; EP3368709B1; WO2017071801A8; CN108138401A; DE102015014722B3; KR20180072694A; EP3368709A1; KR102613284B1

Abstract

The invention relates to a knitting machine with a guide channel and a knitting element guided therein, wherein the knitting element is accommodated and guided in the guide channel in a substantially moveable and interlocking manner. In addition, when viewed in the manufacturing state or in the production and output state, the knitting element (3) is designed with a surface structure at least in sections on at least one opposing knitting element side flank (3a, 3b) when viewed in cross-section and/or the guide channel (4) is formed with a surface structure at least in sections on at least one channel side wall (4a, 4b) facing the knitting element side flanks (3a, 3b), wherein the surface structure has a plurality of elevations (1) spaced apart from one another, which are arranged and designed so that they contact punctiformly and/or linearly on the respective facing area of the knitting element side flanks (3a, 3b) and/or the channel side walls (4a, 4b) during operation, and wherein the surface structure additionally has a plurality of depressions (2) spaced apart from one another which are arranged and designed so that they form a plurality of lubricant reservoirs spaced apart from one another, in which a part of a fluid lubricant, in particular a lubricant oil, introduced into the guide channel (4) is accommodated, and thus forms a lubricant film in the area between the knitting element side flanks (3a, 3b) and the channel side walls (4a, 4b) during operation. According to the invention, the surface structure has a material ratio (Rmr) of 50% at a cutting height (c) of 0.4 μm to 3 μm, preferably only at a cutting height (c) of 0.6 μm to 1.6 μm, according to DIN EN ISO 4287.

Description

description

Knitting machine with a guide channel and a guided therein

knitting member

The invention relates to a knitting machine with a guide channel and a guided therein Strickelements according to the preamble of claim 1, a knitting element for such a knitting machine according to the preamble of claim 7 and a guide channel for such a knitting machine according to the preamble of claim. 8

From the generic DE 10 2011 119 335 B3 an arrangement of a knitting element in a guide channel of a knitting machine is known in which the knitting element at its viewed in cross-section opposite knitting element side edges and / or the guide channel at its the knitting element side edges facing channel side walls with an irregular rugged surface structure is formed. This irregularly rugged surface structure should have a proportion of material according to DIN EN ISO 4287 of 50% only at a cutting height of at least 40 μm, preferably only at a cutting height of at least 50 μm. This thus formed irregular rugged surface structure forms a plurality of spaced-apart elevations, which are arranged and designed so that they lie in operation only point or line on the respective facing region of the knitting element side edges and / or the channel side walls. Likewise, the irregularly rugged surface structure forms a plurality of spaced recesses formed and arranged to provide one Form a plurality of spaced apart lubricant reservoirs, in which a lubricating oil is received, to form in operation a lubricant film in the region between the knitting element side edges and the channel side walls. With such a fissured surface structure, although a capillary structure is formed which, owing to the capillary forces acting there, desirably holds a relatively large amount of oil in the lateral wall area between the knitting element side flanks and the channel side walls, it is due to the strong fissuring of the surface, especially at the beginning an operation with newly inserted knitting elements can partially lead to the formation of bodies with a relatively large, sufficient amount of stored lubricating oil (so-called oil nests), whereas in other, for example, less rugged areas less or too little lubricating oil is present (so-called Dry nests). In practical use, this may then possibly lead to at least occasionally too little lubricant being present, especially at the beginning of the operation with newly inserted knitting elements, and thus, especially at the beginning of the operation of a knitting machine with newly inserted knitting elements, targeted precisely to an undesirably fast abrading given surface roughness, an undesirable increase in temperature in this area and an increase in energy consumption comes.

In contrast, it is an object of the present invention to provide a knitting machine with a guide channel and a knitting element guided therein with a surface structure, in particular with an irregularly rugged surface structure, which is characterized by an optimized Olrückhaltevermögen in the guide channel and thus by an optimal lubrication between knitting element and guide channel , Another object of the invention is to provide a similar knitting element or a similar guide channel available. This object is achieved with the features of the independent claims. Advantageous embodiments thereof are the subject of the dependent claims. According to claim 1, a knitting machine with a guide channel and a knitting element guided therein is proposed in which the knitting element is received and guided in a substantially precise fit (with predetermined tolerance) and displaceable in the preferably slit-like guide channel. Further, the knitting element is on at least one of its viewed in cross-section opposite knitting element side edges and / or the guide channel on at least one of the Strickelement- side flanks facing channel side walls (each considered in the manufacturing state or in the manufacturing and output state, that is in each case not yet operated State of the combination of knitting element and guide channel considered) at least partially formed with a surface structure, preferably an irregularly rugged surface structure. This, preferably irregularly rugged or alternatively regularly trained, surface structure according to the invention a proportion of material according to DIN EN ISO 4287 of 50% with a cutting height of 0.4 μητι to 3 μιη, preferably at a cutting height of 0.6 μιη to 1, 6 μιη, exhibit. The wording "from ... to" here and below always means that the two limit values mentioned, ie, for example, 0.4 or 3 or 0.6 or 1, 6 are expressly included, that is to say the material content is not only all intermediate values between the mentioned limit values, but also these limit values can assume.

As the experiments on the part of the inventor have shown, even with such a surface structure, which is preferably irregularly rugged, a sufficient number of spaced-apart elevations are still provided, which are arranged and designed such that they are in operation only point or line abut the respective facing region of the knitting element side edges and / or the channel side walls. Likewise, such, preferably irregularly rugged, surface structure still forms a sufficient number of spaced recesses formed and arranged to define a plurality of spaced-apart lubricant reservoirs in which a portion of one introduced into the guide channel fluid lubricant, in particular a lubricating oil, and thus formed during operation, a lubricant film in the region between the knitting element side edges and the channel side walls is formed. By the material proportions according to the invention, however, it is advantageously ensured that the surface is more uniformly formed or rugged and thus equalization of the oil distribution over the entire structured area, that is, partial dry nests or locations can be reliably avoided with a relatively small amount of lubricating oil ,

Thus, unlike the generic state of the art of DE 10 2011 119 335 B3, the formation of dry nails not lubricated with oil is avoided because the surface structure according to the invention, preferably irregularly rugged, forms a uniform capillary structure which, due to the effect there Capillary forces are able to hold the oil throughout the lateral wall area between the knitting element sidewalls and the channel sidewalls so as to form a uniform, friction-reducing, permanent lubricant film there.

In addition, such a surface structure due to the solution according to the invention can now even with very thin knitting elements as they are used for example for knitting women's fine tights.

Moreover, as the experiments on the part of the inventors have shown, the aforementioned advantageous effects can be achieved not only with an irregularly rugged or irregularly shaped surface structure, but also with a regularly formed surface structure. In this context, an irregularly formed surface structure is to be understood as meaning, in particular, those surface structures in which the elevations or depressions, with respect to the entire structured surface, are not provided with a regular or regularly recurring pattern via specific or, in particular, larger contiguous regions, that is to say the elevations or depressions are thus arranged more or less arbitrarily. By contrast, a regularly formed surface structure is understood in particular to mean surface structures in which the elevations or depressions, relative to the entire structured surface, are provided with a regular or regularly recurring pattern over larger areas, that is to say the elevations or depressions are not are arranged arbitrarily. For example, the elevations and / or depressions may each be formed the same and / or have an equal distance from each other.

Particularly preferred is an embodiment in which the knitting element has at least one channel bottom bearing area which is rounded in such a way that viewed in cross-section, the knitting element rests linearly on the channel bottom of the guide channel in punctiform or channel longitudinal direction. The production of irregularly shaped, in particular irregularly rugged, surface structure can basically in different ways and done way. Particularly preferred and simple here is a preparation of the irregularly shaped or fissured surface structure by a chemical (for example etching or the like) and / or mechanical surface treatment, wherein for the mechanical surface treatment, a surface treatment with an undefined cutting geometry, for example, a grinding method is preferred , In particular, in this case also a combination of a chemical surface treatment (for example by etching, ie the removal of material by means of at least one corrosive substance) with a mechanical surface treatment (for example, a surface treatment with an undefined cutting geometry), so for example the combination of etching and grinding, be advantageous to be able to produce a desired irregularly rugged surface structure in a functionally reliable manner.

The production of a regularly formed surface structure can take place, for example, by laser processing, although regular surface structuring by mechanical surface treatment is preferred. Particularly preferably, the regularly formed surface structure can be produced by a mechanical surface treatment with an embossing device having a corresponding regular structure (or negative structure), most preferably by means of at least one embossing roller. As already mentioned above, the material content of the surface structure is specified in accordance with DIN EN ISO 4287 and expresses the percentage ratio of the sum of the material lengths or the material-carrying lengths of the individual surveys or profile elements of the surface structure to be taken at a predetermined cutting height to the measuring section. The material component curve finally indicates the proportion of material as a function of the cutting height. Preference is given to the proportion of material as an average Average value determined by measurement in a plurality of directions with respect to the respective surface different directions, wherein it is particularly preferably provided that the material content of a side edge of the Strickelements by measurement in relation to the longitudinal direction of the Strickelements, vertical and horizontal and at a defined angle, preferably 30 ° to 60 °, most preferably 45 °, direction is determined. With such a specified or determined proportion of material, a regular or preferably irregularly fissured surface structure which is particularly reliably formed with the desired roughness and which has the desired friction-reducing or oil-retaining properties is obtained. In addition, it is only possible to make a statement about the nature of the surface structure in relation to the surface, whereas without this approach in several directions only a "line" is described.

The advantages resulting from the features of claim 8 or 10 are substantially similar to those of the previously described knitting machine, so that their repetition is dispensed with. 1 shows, by way of example, in the left image plane, a surface structure in which the surface roughness Rt in μηι is plotted over a measuring section In, which can be selected as desired, for example a knitting element side flank or a defined knitting element flank region. It is very good here to recognize the irregular rugged surface structure produced here merely by way of example by a chemical and / or mechanical grinding process, which, in particular also with reference to a cutting height or cutting line C selected at 1, 2 μιτι, a multiplicity of elevations 1 spaced apart from one another and a plurality of spaced wells 2 has. In the right image plane of Fig. 1, the material component curve is plotted, showing that the material content Rmr at a cutting height or a cutting line of 1, 2 pm 50%; in other words, at the cutting height 1, 2 pm 50% material and 50% "holes" are present.

With such a trained, here only exemplary irregularly rugged surface structure results in the aforementioned advantages of the invention, which is again shown schematically in the exaggerated for clarity and greatly enlarged shown Fig. 2, which only very schematically shows a cross section through an arrangement a Strickelements 3 in a guide channel of a knitting machine not shown here shows. The knitting element 3 is here substantially snugly received and guided in the guide channel 4, wherein the knitting element 3 has a rounded bottom channel support area 5, that the knitting element 3 rests point-shaped in the cross-section considered here at the channel bottom 6 of the guide channel 4.

In the preferred embodiment shown here, the knitting element 3 at both viewed in cross-section Strickelementseiten- flanks 3a and 3b, considered in the manufacturing state or in the manufacturing and initial state, at least partially here again only exemplary exemplary irregularly rugged surface structure, according to DIN EN ISO 4287 a material content Rmr of 50% at a cutting height c of 0.40 pm to 3.00 pm, more preferably only at a cutting height c of 0.60 pm to 1.60 pm, as exemplified in FIG is.

As is further illustrated in FIG. 2 only extremely schematically and by way of example, the knitting element has on its side flanks 3 a and 3 b, in particular due to or in accordance with the invention Material part, a still in such a way (here irregularly rugged) surface structure that a sufficient plurality of spaced-apart elevations (Fig. 1) is formed, which in operation only point or line on the respectively associated channel side walls 4a and 4b of the guide channel 4th issue.

As can be further seen from the schematic representation of FIG. 2, the here, for example, irregularly rugged surface structure of the side flanks 3 a, 3 b, in particular due to or in the material proportion predetermined according to the invention, continues to form a sufficient number of mutually spaced depressions 2 1), which are formed and arranged with respect to each other to form a plurality of spaced-apart lubricant reservoirs, in which a part of a fluid lubricant, such as a lubricating oil, introduced into the guide channel 4 is received and thus in operation a lubricant film (represented by the oil droplets 8) is formed in the area between the knitting element side flanks 3a, 3b and the channel side walls 4a and 4b. Although this is not shown in FIG. 2 for reasons of clarity, according to a particularly preferred embodiment, either or both the knitting element flanks 3 a, 3 b respectively directly opposite or associated inner walls or channel side walls 4 a, 4 b each have an identical, for example irregular fissured, for example, produced by chemical and / or mechanical surface treatment, have surface structure according to DIN EN ISO 4287 a material content Rmr of 50% at a cutting height c of 0.ιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιιι from 0.60 μητι to 3.00 μιτι having. With such an inventive arrangement, the advantages described in detail above are achieved.

In FIG. 3, only a very schematic and exemplary lateral view of a side flank 3b of a board 3, which is arbitrarily selected here, in particular with regard to its geometry, is shown as a knitting element. This illustration also clearly shows that, for a reduction in friction, provision is made in particular for the channel bottom support region 5 to be rounded over the entire length so that it rests linearly against the channel bottom 6 in the longitudinal direction of the channel.

In addition, in FIG. 3, the arrows v, d and h schematically show that it is preferably provided that the material component Rmr, viewed in the longitudinal direction of the knitting element, is in the vertical direction v, in the horizontal direction h and at a defined angle (here by way of example) °) is determined in the diagonal direction d, so that the proportion of material is an averaged average value from these three sub-values determined in different directions. The latter also applies analogously to the side flank 3a or, if this should be the case, for the channel side walls 4a and 4b. As a result, the desired planar surface structure is determined.

It should also be expressly mentioned at this point that the term production state or production and initial state should mean here that surface texture properties of the sinkers or of the guide channel side walls are present, as they are immediately after their production, that is to say they are not operated state of the arrangement.

It should also be mentioned explicitly at this point that the term "knitting elements" is to be understood in a broad sense and to Example boards, needles, selectors, jacks, jacks, transfer jacks (transfer boards) or the like should include.

As already mentioned, instead of the irregularly fissured surface structure illustrated or described in connection with the figures, at least in part a regular surface structure may be formed with elevations and / or depressions uniformly spaced apart, for example.

Claims

claims

A knitting machine having a guide channel and a knitting element guided therein, wherein the knitting element is received and guided substantially accurately and slidably in the guide channel, and wherein the knitting element (3) on at least one of its viewed in cross-section opposite knitting element side edges (3a, 3b ) and / or the guide channel (4) on at least one of the knitting element side flanks (3a, 3b) facing channel side walls (4a, 4b), each considered in the manufacturing state or in the manufacturing and output state, at least partially formed with a surface structure, wherein the surface structure comprises a plurality of spaced-apart elevations (1), which are arranged and formed such that they in operation point and / or line on the respectively facing portion of the knitting element side edges (3a, 3b) and / or the channel side walls (4a, 4b) lie, and wherein the surface structure further a A plurality of spaced recesses (2) formed and arranged to form a plurality of spaced-apart lubricant reservoirs in which a portion of a fluid lubricant introduced into the guide channel (4), in particular a lubricating oil, received and thus in operation a lubricant film in the region between the knitting element side edges (3a, 3b) and the channel side walls (4a, 4b) is formed, characterized in that the surface structure according to DIN EN ISO 4287 a proportion of material (Rmr) from 50% at a cutting height (c) of 0.4 pm to 3 μιτι, preferably at a cutting height (c) of 0.6 pm to 1, 6 μητι having.

2. Knitting machine according to claim 1, characterized in that the

Surface structure is at least partially formed by an irregularly shaped, preferably irregularly rugged, surface structure and / or that the surface structure is at least partially formed by a regularly formed surface structure.

3. Knitting machine according to claim 1 or 2, characterized

in that the knitting element (3) has at least one channel bottom supporting region (5) which is rounded in such a way that the knitting element (3), seen in cross-section, rests at least regionally linearly on the channel bottom (6) of the guide channel (4) when viewed in the channel longitudinal direction.

4. Knitting machine according to one of the preceding claims, characterized in that the surface structure, preferably an irregularly formed or fissured surface structure by a chemical surface treatment, preferably by etching, is prepared and / or that the surface structure, preferably an irregular and / or regularly formed surface structure is produced by a mechanical surface treatment, preferably an irregular surface structure by a mechanical surface treatment with an undefined cutting geometry, most preferably by grinding, or a regularly formed surface structure by a mechanical surface treatment with a, a corresponding regular structure having embossing device, most preferably by means of at least one embossing roll is made.

5. Knitting machine according to one of the preceding claims, characterized in that the proportion of material is an averaged average value, which is determined by measurement in a plurality of directions with respect to the respective surface different directions.

6. Knitting machine according to claim 5, characterized in that the

Material portion of a side edge (3a, 3b) of a knitting element (3) or a channel side wall of the guide channel by measuring in relation to the longitudinal direction of a Strickelements (3) or the guide channel (4), vertical and horizontal and at a defined angle, preferably 30 ° to 60 °, most preferably 45 °, direction is determined.

7. Knitting machine according to one of the preceding claims, characterized in that the knitting element (3) is made of a sheet metal material, in particular as a stamped part is made of a sheet metal material.

8. knitting element for a knitting machine after a previous one

Claims which are made on at least one of its knitting element Side flanks (3a, 3b), considered in the manufacturing state or in the production and initial state, at least partially formed with a surface structure according to DIN EN ISO 4287 a proportion of material (Rmr) of 50% at a cutting height (c) of 0.4 pm to 3 pm, preferably only at a cutting height (c) of 0.6 pm to 1, 6 pm, wherein the surface structure also has a plurality of spaced apart protrusions (1) and a plurality of spaced wells (2) ,

9. knitting element according to claim 8, characterized in that the

10. guide channel for a knitting machine according to one claims 1 to 7, on at least one of the knitting element side edges (3a, 3b) facing channel side walls (4a, 4b), considered in the manufacturing state or in the manufacturing and initial state, at least partially with a surface structure is formed, according to DIN EN ISO 4287 a proportion of material (Rmr) of 50% at a cutting height (c) of 0.4 pm to 3 μιτι, preferably only at a cutting height (c) of 0.6 mm to 1, 6 pm , wherein the surface structure further comprises a plurality of spaced-apart protrusions (1) and a plurality of spaced recesses (2).

11. Guide channel according to claim 10, characterized in that the

Surface structure at least partially by an irregularly shaped, preferably irregularly rugged, Surface structure is formed and / or that the surface structure is at least partially formed by a regularly formed surface structure.