JPH06192921A - Spinning ring for ring spinning frame and ring spinning frame containing said ring - Google Patents

Abstract

PURPOSE: To prolong the service life of spinning ring coat for a ring frame and to reduce the grinding action of a traveler to the coat and the grinding action of the coated layer to the traveler. CONSTITUTION: At least the contacting surface of a fine spinning ring 10 with the traveler 12 is coated with a metal and phosphorus layer 14 into which fine ceramic particles are incorporated. An additional coating layer 16 is provided on the base layer 14. The thickness of the additional coating layer is determined so that the particles 15b of the fine ceramic particles 15 projecting from the base layer 14 are completely covered by the additional coating layer. The running-in of a new fine spinning ring can be carried out in a short time at high sliding speed.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention uses a spinning ring made of metal and phosphorus having fine ceramic grains mixed with at least a contact portion with a traveler, and a large number of spinning rings for winding a yarn. Ring spinning machine.

[0002]

2. Description of the Related Art In the development of spinning rings, in addition to improving the shape, increasing the wear resistance of the surface and shortening the familiar running time are problems.

The wear mechanism depends inter alia on the interaction between the spinning ring and the traveler guided thereby.
Once the surface of the spinning ring has a point of damage, this impairs the stability of the traveler in orbit and increases the surface load at the point of contact of the ring traveler, which results in a point-like maximum stress on the spinning ring. Occurs and wear is enhanced. On the other hand, the traveler in this case breaks quickly,
You have to replace it with a new one.

During the surface treatment of the spinning ring, a coating technique is provided, in which the metal-phosphorus alloy is strengthened, especially in the bath by a dispersion of the metal or ceramic, on the sliding surface of the spinning ring. It is provided. Hereinafter, this metal / phosphorus / dispersion layer is referred to as MPD.

EP-A-201102 proposes an MPD which increases the wear resistance of the ring and reduces the familiar running time. In the above-mentioned specification, for example, in a nickel metal containing nickel phosphorus,
It has been proposed to incorporate fine ceramic particles to increase the hardness of the protective layer.

The problem with such an MPD layer is, in fact, that the dispersion (the fine ceramic grains incorporated) has a very high hardness and therefore has a grinding effect on the traveler. After coating, individual particles always project from the layer. This causes the traveler to wear very rapidly without additional polishing or polishing.

[0007]

The object of the present invention is to improve the composition of the coating, to significantly reduce the familiar running time of the new spinning ring, to significantly improve the life of the ring coating and to improve the layering on the traveler. The purpose is to reduce the grinding effect and, conversely, the grinding effect of the traveler on the layer.

[0008]

This problem is solved by an additional coating layer on the surface of the spinning ring, which is provided on a base layer, which preferably consists of metal-phosphorus and consists of MPD. Both layers desirably have a minimum content of 4% phosphorus. Metals include nickel, cobalt, iron or combinations of the metals mentioned above, namely nickel-cobalt, cobalt-iron, nickel-iron or alloys of all three metals, in each case the phosphorus mentioned above. There must be a minimum content. In order to separate metal layers having a high phosphorus content, electrolysis methods are provided above all. If a phosphorus content of 10% or less is sufficient for use in the spinning ring, the layers on the spinning ring can be separated by non-electrolytic methods.

The metal-phosphorus base layer is reinforced, for example by silicon carbide. Unlike conventional coated spinning rings, the fine ceramic grains protruding from the layer are completely covered by the coating layer. Rapid running-in takes place in the coating layer, which is therefore also called the running-in layer. The familiar running layer has a thickness of at least 3-5 μm. As the running time increases, a slight wear of the coating layer occurs on each occasion, with the traveler getting closer and closer to the cusps of the fine ceramic grains. The heating of the spinning ring under the frictional stress by the traveler will change due to the frictional heat transferred by the fine ceramic grains so that the hardness is reduced and a wear resistance is acceptable for the traveler. This allows the traveler to operate on surfaces that are highly wear resistant but also aggressive. The base layer of MPD is provided, in particular, with a thickness of 5 to 25 μm, in which case fine ceramic grains are contained in this layer, as described above. The coating layer, in particular nickel-phosphorus, preferably has a layer thickness of 3 to 5 μm. In principle, the production of this bilayer is also possible in one step by reducing the proportion of incorporated dispersion to zero by controlling the bath appropriately in the final phase of the coating. It is likewise possible to gradually shift a certain volume percentage of the dispersion to zero.

The spinning ring is precision ground to a roughness Ra = 0.1 ... 0.2 μm before coating the base layer and the additional coating layer. The processing of the spinning ring also includes a sliding polishing method.

The present invention will now be described in detail with reference to the drawings.

[0012]

EXAMPLE A spinning ring 10 having an outer shell shown in chain lines
Is the base layer 14 at least in the range of contact with the traveler 12.
Have. It is also possible for the spinning ring to be manufactured entirely from the material of the base layer 14 within this range. Particle 1 in the base layer
Fine ceramic particles 15 having 5a and 15b are mixed therein. The individual particles 15b can also be projected from the surface of the base layer 14 shown by the chain line as shown in FIG. The coating layer 16 has a thickness such that at least the grains 15 are completely covered in the ring spinning machine before the spinning ring is used and the spinning ring does not come into contact with the traveler 12 immediately after the spinning machine is started. Should.

As can be seen from FIG. 2, the contact between the fine ceramic grain particles 15b and the traveler 12 is due to the coating layer 1 during operation of the spinning ring with the traveler 12.
It can occur only when 6 becomes thin at the position of A by the size of h. As soon as the wear of the coating layer 16 exceeds the magnitude of h, the traveler 12 rubs when running too close to the tips of the particles 15b, so that the tips of the particles are gradually ablated as the wear progresses. The material of the cover layer 16 surrounding the cusps of the particles 15b prevents the traveler 12 from excessive wear at this point. The hardness of the surface of the traveler 12 is within the range of the hardness of the base layer 14, but is much smaller than the hardness of the fine ceramic particles 15. Due to the heat generation in the contact zone between the traveler 12 and the coating layer 16, the structure of the particles 15a, 15b changes so that their hardness decreases. This causes a slight polishing action on the traveler 12 as soon as the cusps of the particles 15a, 15b come into contact with the traveler 12 after the partial removal of the coating layer 16 and the cusps themselves can be lightly ground. It will be. In this way, the new spinning ring 10
The familiar running process can be completed in a short time and at a high gliding speed for the ring 10.

[Brief description of drawings]

FIG. 1 is a sectional view of a spinning ring.

2 is an enlarged view of detail A from FIG. 1. FIG.

[Explanation of symbols]

 10 Spinning Ring 12 Traveler 14 Base Layer 15 Fine Ceramic Particles 15a, 15b Particles 16 Coating Layer A Detail h Size

Claims (11)

[Claims] 1. Fine ceramic grains (15) at least on the contact surface between the spinning ring (10) and the traveler (12).
A ring spinning machine spinning ring comprising a metal / phosphorus layer (14) in which is mixed, characterized in that an additional coating layer (16) is provided on the base layer (14). Spinning ring for spinning machine. 2. Spinning ring according to claim 1, characterized in that the base layer (14) has a thickness of 5 to 25 μm. 3. The spinning ring according to claim 1, wherein the phosphorus content is at least 4% by weight. 4. The spinning ring according to claim 1, wherein silicon carbide is mixed in the metal-phosphorus layer (14). 5. The spinning ring according to claim 1, wherein the coating layer (16) is made of metal / phosphorus. 6. Nickel, cobalt or iron or a combination of these metals as the metal, that is, nickel-cobalt, cobalt-iron, nickel-iron or nickel-cobalt-iron is used.
The spinning ring according to any one of 1 to 6 above. 7. The coating layer (16) is preferably 3-5 μm.
The spinning ring according to any one of claims 1 to 6, wherein the spinning ring has the following thickness. 8. The covering layer (16) comprises particles (15) of fine ceramic particles (15) protruding from the base layer (14).
8. The thickness of b) is selected such that it is completely flattened by the covering layer (16).
The spinning ring according to any one of 1 to 6 above. 9. Providing the base layer (14) and the coating layer (16) in one working step is triggered by a corresponding bath control in which the volume fraction of the dispersion separated in the final phase of the coating is reduced to zero. Claims 1 to 8 characterized in that
A method for coating a spinning ring as described above. 10. The method according to claim 9, characterized in that a change in the volume ratio from a specific value to zero is gradually formed by suitable bath control. 11. A ring spinning machine having the spinning ring according to claim 1. Description: