TWI622680B - Rotary feeder of knitting machine and preparation method thereof - Google Patents

Abstract

The invention relates to a rotary feeder for a knitting machine, in particular a draw frame or a thorn fruiting machine, for placing a fiber ribbon in a can having a base body (2) and fibers arranged in the base body (2) With channel (3). According to the invention, when the turner feeder (1) is applied as specified, the side of the turner feeder (1) facing the can has at least partially a coating (6) with a three-dimensional structure, the three-dimensional structure being spherical The regular protrusions (11) are formed.

Description

Rotary feeder of knitting machine and preparation method thereof

The present invention relates to a turntable feeder and a method for manufacturing a turner feeder for a knitting machine, in particular a draw frame or a thorn fruiting machine, which is used for placing a fiber ribbon in a can having The substrate and the fiber ribbon channel disposed in the substrate.

A rotary feeder for a knitting machine, in particular a draw frame, a thorn fruiting machine or a comber, is known from DE 103 34 758 B4. When the machine is in operation, the turntable feeders and the fiber ribbons to be processed in the machine are in contact with each other. In this case, the underside surface of the turntable feeder, which is in contact with the fiber web, has a three-dimensional structure which is formed by projections and recesses at least in sections, wherein the projections are formed in the form of a honeycomb. The effect of the three-dimensional structure is generally that the friction between the turntable feeders and the fiber ribbon is not reduced. Excessive friction pulls the fibers of the fiber ribbon placed in the container together by the rotational motion of the turntable feeder. By pulling together, it may cause uncontrolled placement and cause damage to the fiber ribbon.

The disadvantage of these honeycomb-like projections is that they were originally designed and approved for processing specialized polyester types. In the polyester types of different manufacturers of today's applications, which have mutually different characteristics, although the protrusions are honeycomb-shaped, the effect of pulling together still occurs. This negative effect occurs even in other fibrous materials such as cotton.

It is therefore an object of the present invention to create a three-dimensional structure on a turntable feeder. It reduces the friction between the turntable feeder and the fiber ribbon and thus prevents the fibers of the various fibrous materials having different characteristics from being pulled together.

This object is achieved by a turntable feeder for a knitting machine as described in the separate item and a method for manufacturing a turntable feeder.

A turner feeder for a braiding machine, in particular a draw frame or a thorn fruiting machine, is proposed for placing a fiber ribbon in a can having a base and a fiber band passage disposed in the base.

According to the invention, when the carousel feeder is applied as specified, the side of the carousel facing the can has at least partially a coating with a three-dimensional structure consisting of spherical irregular projections.

When the carousel is applied as specified, the carousel is usually placed above the can and here carries out a rotational movement about a vertical axis. The can is here usually a cylindrical container closed downwards. The fiber ribbon is placed in the can through the upper opening of the can.

The fiber ribbon channel is disposed in the base of the carousel feeder through which the fiber ribbon extends and is placed downwardly in the can. Typically, the coating is in contact with the fiber ribbon that has been placed in the can. By the special coating having a three-dimensional structure, the fiber of the fiber ribbon is prevented from being pulled together by the rotary feeder, which is composed of spherical, irregular projections. The contact surface between the coating and the fiber ribbon is prevented by the spherical irregular projections, since only the upper region of the spherical projections is in contact with the fiber ribbon and only a small friction is applied to the fiber ribbon.

In addition, it is advantageous if the coating is provided on the base body and/or the cover, the cover being fastened to the side of the base facing the can. The coating directly on the substrate accelerates the manufacturing process and reduces material costs, and thus overall saves manufacturing costs. Other than this It is additionally or alternatively advantageous if the coating is first provided on a separate cover. This simplifies the manufacturing process because only the cover requires a coating process and the cover must be fixed to the substrate. Also, the cover can be removed or completely replaced for maintenance purposes.

It is additionally advantageous if the cover is glued to the base body, screwed together with the base body and/or wound in a recess which is wound on the base body by the edge of the base body. In order to save manufacturing costs, it is possible to utilize the method of pasting. If the cover is releasably placed on the base, the tightening is applied. The protruding edge is simply wound in the groove of the base by means of a machine.

It is particularly advantageous for the coating to be arranged on the base body and/or the cover piece by piece, in particular spaced apart from the edge, on which the cover is wound. This saves costs because only a small amount of surface of the lid and/or substrate is applied. It is also ensured that the smeared area no longer passes after application.

Furthermore, it is advantageous if the coating consists of at least one base layer, structural layer and/or cover layer. A base layer is usually necessary to form the underlying layer for the definition of the structure layer. Thus, the base layer balances the unevenness of the substrate and provides a smooth surface onto which the structural layer can be applied.

The structural layer constitutes a three-dimensional structure composed of spherical irregular protrusions.

To protect the structural layer from wear, apply a cover layer. By means of the protective covering layer on the structural layer, for example, a structural layer composed of a softer material can be considered to simplify the manufacturing process. It is of course also conceivable for the base layer, the structural layer and/or the cover layer to be composed of different materials.

It is also possible not to use a base layer and/or a cover layer.

If the coating consists of chromium and/or chrome alloys, it also brings advantages. Coatings made of this material are particularly resistant to wear. In addition to this, chromium and / or chromium alloys can Easy to clean or polish.

It is also advantageous for the projections to have a size in the range from 0.1 μm to 10 μm, in particular from 0.6 μm to 4 μm. When the size of these protrusions is within this range, an effect similar to the lotus effect known in nature is also effective on the fiber ribbon. The intermediate cavity between the protrusions is too small so that the fiber ribbon or its fibers cannot be hooked between them. Therefore, the fibers of the fiber ribbon are pulled together by these intermediate cavities. However, these protrusions can also be arranged and dimensioned in such a way that an airbag can be formed in the intermediate chamber. In this case, the airbags can also pass over the projections, so that the fiber web is only indirectly in contact with the coating by means of the airbag. The airbag ultimately reduces sliding friction and reduces the phenomenon of pulling together.

A method for manufacturing a turner feeder for a knitting machine, in particular a draw frame or a thorn fruiting machine, is also proposed, which is used for placing a fiber ribbon in a can having a base body and a base body The fiber belt channel.

According to the invention, when the carousel feeder is applied as specified, the side of the carousel facing the can has at least partially a coating with a three-dimensional structure consisting of spherical irregular projections. By applying a coating having a three-dimensional structure, the fibers of the fiber ribbon are prevented from being pulled together by the rotary feeder, which is composed of spherical, irregular projections.

It is particularly advantageous for the coating to be arranged on the base body and/or the cover, the cover being fastened to the side of the base facing the can. If the coating is placed on the substrate, the cost is saved by saving material and manufacturing faster. Instead, the coating can also be applied to the lid, which simplifies the application process since only the lid requires the application process. Subsequently, the cover is fixed to the substrate by a simple working step.

It is also advantageous if the cover is glued to the base body. Paste here is a simple A single and fast process, so both the lid and the substrate must be handled by multiple working steps.

Additionally or additionally, the cover can of course also be screwed onto the base body. In the case where the method is applied, the cover can be removed for maintenance purposes. Therefore, it is also possible to replace the complete cover.

Alternatively or additionally, it is also possible for the cover to be wound in a recess on the base body by means of an edge which is higher than the base body. In this case, it is advantageous if the entangling action can be carried out simply by means of a machine and also saves production time and costs.

It is also advantageous if the coating is arranged on the base body and/or the cover piece by piece, in particular spaced apart from the edge, on which the cover is wound. This saves costs because only a small amount of the surface of the lid and/or the substrate is applied and the loss of the coating when the lid is deformed is avoided.

It is particularly advantageous if the coating consists of at least one base layer, structural layer and/or cover layer. Here, the base layer is used as the underlying layer of the structural layer (Untergrund). Furthermore, the base layer also fulfills the function of balancing possible irregularities in the underlying material of the base or cover. The base layer is a structural layer that forms a smooth surface. The structural layer comprises a three-dimensional structure consisting of spherical irregular protrusions and applied to it after the base layer. The final cover layer is finally applied and encapsulated, or is typically used to protect the structural layer from external influences.

Below are the methods used to apply each coating. The base layer is applied by a common plating process. However, gas separation, chromization or other methods are also conceivable, with which a suitable base layer can be produced.

The application of the structural layer is carried out in a packaged reactor. The chromium separation method of electroplating is also applied here. In the method for producing a structural layer, the nucleation process is fully utilized. characteristic. Embryonic cells are gradually formed on the base layer, and they grow spherically during the course of the process. Irregular structures of these protrusions are achieved by randomly generating blast cells on the base layer. By varying the physical parameters in the reactor, it is possible to control the size of these protrusions, the distribution on the surface, the rate of growth, or the like. Therefore, the temperature inside the reactor has an effect on the growth rate of the protrusions. The reproducibility of the structural layers is then achieved in such a way that the same physical parameters are adjusted in each method. In addition to this, high dimensional accuracy can be achieved by this method.

The visor is finally applied by a different method (similar to the method of the base layer). It is noted here that the cover layer cannot be applied too thick, since the undesired protrusions (and the depressions between them) are balanced by means of the cover layer.

If the coating consists of chromium and/or chrome alloys, it also brings advantages. The advantage of "chrome plating" is wear resistance and is stable with respect to different corrosive gases and liquids.

1‧‧‧ Turntable feeder

2‧‧‧ base

3‧‧‧Fibre belt channel

4‧‧‧孔口

5‧‧‧ cover

6‧‧‧Coating

7‧‧‧ bottom material

8‧‧‧Basic layer

9‧‧‧Structural layer

10‧‧‧ Covering layer

11‧‧‧ Protrusion

12‧‧‧ Groove

Other advantages of the invention are illustrated in the following examples. Wherein: Figure 1 shows a schematic structure of a turntable feeder; Figure 2a shows a cross section of the coating with spherical irregular protrusions; Figure 2b shows a cross section of the coating with more A small number of spherical irregular protrusions; and Figure 3 shows a section of the edge region of the turntable feeder with a lid and a coating.

A schematic structure of the carousel feeder 1 is shown in FIG. The carousel feeder 1 here consists of a base body 2 and a fiber web channel 3 arranged in the base body 2. A fiber ribbon, not shown here, is caused by the fiber strip channel 3, which leaves the fiber strip 3 and the aperture 4 of the substrate 2 downwards Turntable feeder 1. The cover 5 is fixed to the base body 2 on the underside of the turntable feeder 1 and also has an aperture 4. When the carousel feeder 1 is applied as specified, the lower side refers to the side facing the can. The coating 6 is applied to the lower or lower side of the cover 5, which is illustrated in detail in FIG.

Figure 2a shows a cross section of the coating 6 with spherical, irregular protrusions 11. This coating 6 is applied to the primer 7. The primer 7 can here be part of the cover 5 or part of the base body 2. The coating 6 has three single layers, namely a base layer 8, a structural layer 9, and a cover layer 10. This base layer 8 is attached to the base material 7 and is used, for example, as a carrier layer for the structural layer 9 or to balance the unevenness of the primer material 7. A structural layer 9 having spherical, irregular protrusions 11 is applied to the base layer 8. As can be seen, these protrusions 11 have different sizes. The cover layer 10 closes the coating 6 downwards.

Figure 2b shows the coating 6 in a cross section similar to Figure 2a. Therefore, the same components as in Fig. 2a are not described here. However, these projections 11 are not so thick on the base layer 8, i.e. the number of projections 11 in each surface unit is also less than in Figure 2a. The two projections 11 each have a spacing here which can be in the order of several orders of magnitude of the intermediate projections 11 . If the intermediate protrusions 11 have a size of, for example, 5 μm, the spacing between the respective two protrusions 11 is, for example, 50 μm. However, it is also conceivable that the spacing between the two projections 11 has only a part of the dimensions of the elevations 11. It is therefore also conceivable, for example, for the spacing between the two projections 11 to be only 1-2 μm or less.

Figure 3 shows a portion of the edge region of the carousel feeder 1 with the cover 5. A groove 12 is provided in the edge region of the base body 2 of the turntable feeder 1. The cover 5 is fixed to the base 2 in such a manner that the side of the cover 5 is wound in the recess 12. This coating 6 is provided on the cover 5, which coating is only implicitly shown as compared to the smaller size of the carousel feeder 1. However, the coating did not reach the area where the lid 5 was rolled up. It is therefore a section where the coating 6 is not provided.

The invention is not limited to the embodiments shown and described. Combinations of features and features within the framework of the patent claims are equally possible, even if they are shown and described in the various embodiments.

Claims (16)

A rotary feeder for a knitting machine for placing a fiber ribbon in a can having a base body (2) and a fiber ribbon passage (3) disposed in the base body (2), wherein When the rotary feeder (1) is applied as specified, the rotary feeder (1) faces the side of the can at least partially with a coating (6) having a three-dimensional structure consisting of spherical irregular protrusions (11) constituting, wherein by the coating of the irregular spherical protrusions of the three-dimensional structure, the fibers of the fiber ribbon are prevented from being pulled together by the turntable feeder, and the contact surface between the coating layer and the fiber ribbon is prevented, The upper region of the spherical projection is brought into contact with the fiber ribbon and only a small amount of friction is applied to the fiber ribbon. The turntable feeder according to claim 1, wherein the coating (6) is disposed on the base (2) and/or a cover (5), wherein the cover (5) is fixed to the base (2) ) facing the side of the jar. A turntable feeder as claimed in claim 2, wherein the cover (5) is adhered to the base body (2), screwed together with the base body and/or by means of an edge roll which is higher than the base body (2) In a groove (12) on the base (2). The turntable feeder according to claim 3, wherein the coating (6) is disposed on the substrate (2) and/or the cover (5) piece by piece and separated from the edge of the substrate (2). The cover (5) is wound on the edge. A turntable feeder as claimed in claim 1, wherein the coating (6) consists of at least one base layer (8), a structural layer (9) and/or a covering layer (10). The turntable feeder of claim 1, wherein the coating (6) is composed of chromium and/or a chromium alloy. The turntable feeder of claim 1, wherein the protrusion (11) has a size in the range of 0.1 μm to 10 μm. The turntable feeder of claim 7, wherein the protrusion (11) has a size in the range of 0.6 μm to 4 μm. The rotary feeder according to claim 1, wherein the knitting machine is a draw frame or a thorn fruiting machine. A method for manufacturing a turntable feeder for a knitting machine for placing a fiber ribbon in a can having a base body (2) and a fiber tape passage provided in the base body (2) (3) characterized in that, when the rotary feeder (1) is applied as specified, the side of the rotary feeder (1) facing the can is at least partially coated with a coating (6) having a three-dimensional structure, the three-dimensional structure Consisting of spherical irregular protrusions (11), wherein the fibers of the fiber ribbon are prevented from being pulled together by the rotary feeder by the coating of the irregular spherical protrusions of the three-dimensional structure, and the coating and the coating are prevented The contact surface between the fiber ribbons causes the upper region of the spherical projection to contact the fiber ribbon and exerts only a small amount of friction on the fiber ribbon. A method for manufacturing a turntable feeder for a knitting machine according to claim 10, wherein the coating (6) is provided on the base (2) and/or a cover (5), wherein the cover ( 5) Fixed on the side of the base body (2) facing the can. A method for manufacturing a turntable feeder for a knitting machine according to claim 11, wherein the cover (5) is adhered to the base body (2), screwed together with the base body and/or The edge of the substrate (2) is wound in a groove (12) on the substrate (2). A method for manufacturing a turntable feeder for a knitting machine according to claim 12, wherein the coating (6) is disposed on the substrate (2) and/or the cover (5) piece by piece and with The The edges of the base body (2) are spaced apart and the cover (5) is wound on the edge. A method for manufacturing a turntable feeder for a knitting machine according to claim 10, wherein the coating (6) consists of at least one base layer (8), structural layer (9) and/or cover layer (10) ) constitutes. A method for manufacturing a turntable feeder for a knitting machine according to claim 10, wherein the coating (6) is composed of chromium and/or a chromium alloy. A method for manufacturing a turntable feeder for a knitting machine according to claim 10, wherein the knitting machine is a draw frame or a thorn fruiting machine.