JPH04327223A - Ring for use in spinning machine - Google Patents

Abstract

PURPOSE:To provide a ring excellent in initial assimilability, capable of preventing traveller scorching and scattering, designed to accomplish stable operations. CONSTITUTION:At least the flange surface for the title ring, with a traveller coming into contact therewith, is, in advance, provided with a phosphate film 0.1-1.0mum in the surface roughness Ra and 2-7mum thickness, and coated the resultant surface with a resin with solid lubricant particles dispersed therein to form a resin film 5-25mum thick.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ring for spinning machines, which is used in spinning machines, yarn twisting machines, etc., and has improved abrasion resistance and conformability, especially in high-speed ranges.

0002

[Prior Art] Conventional spinning machine rings use a low-carbon steel material as a surface hardening method for the flange portion, and after forming the ring by lathing, carburizing is performed to achieve a surface carbon content of 0.8.
It was formed by being quenched so that it became 1.0%.

0003

[Problems to be Solved by the Invention] Under high-speed spinning conditions in today's spinning mills, the frictional resistance between the ring and the traveler increases. It was necessary to familiarize the passengers with the Traveler. However, the above-mentioned carburized and quenched ring has problems such as premature seizing and scattering of the traveler even if run-in operation is performed, and furthermore, the life of the ring is significantly shortened.

0004

[Means for Solving the Problems] The present invention has been made to solve the above-mentioned problems, and includes applying a film thickness of 2 to 7 μm to at least the surface of the flange that comes into contact with the traveler.
m and a surface roughness Ra of 0.1 to 1.0 μm is formed, and on the surface of the film, one type or a mixture of several types of epoxy resin, polyamide resin, and phenolic resin is applied. Based on molybdenum disulfide,
It is coated with a resin made by mixing and dispersing one or more of graphite and fluororesin as a solid lubricant, and is fixed integrally by heat treatment to form a resin film with a thickness of 5 to 25 μm and a coefficient of friction of 0.3 or less. By forming such a ring, it is possible to provide a ring for a spinning machine that has greatly improved initial conformability and abrasion resistance.

An embodiment of the present invention will be described below with reference to the drawings.

[0006]

[Example] As shown in Fig. 1, low carbon steel containing 0.1% C is cut and formed into a predetermined ring shape, and then carburized to reduce the carbon concentration on the surface to 0.6~ 1.1%,
Thereafter, the ring body 1 is formed by hardening and tempering. Note that chromium bearing steel may be used as the ring material and may be hardened and tempered.

The ring main body 1 formed as described above is immersed in a zinc phosphate solution, and as shown in FIG.
．． A zinc phosphate film 3 of 5 μm is formed.

The ring body 1 on which the zinc phosphate film 3 has been formed is degreased and washed, and if necessary, smut and the like adhering to the surface of the flange portion 2 are removed using a soft wire brush to clean it.

Next, the ring body 1 is heated to 60°C to 230°C.
After preheating for 10 to 60 minutes at
For spinning machines, a resin film 4 with a thickness of 10 μm and a coefficient of friction of 0.2 is integrally fixed on the surface of the flange portion 2 by heating and baking at a temperature of 0°C to 230°C for 20 to 60 minutes. Ring 5 was constructed.

Although the zinc phosphate coating 3 was formed as a phosphate chemical conversion coating, other coatings may be used, and the thickness of the coating was set at 4 μm, but it may be 2 to 7 μm, preferably 3 to 5 μm. . If it is less than 2 μm, the film tends to be unevenly formed, and the adhesion with the ring body decreases.
If the thickness is 7 μm or more, the processing time will be long and the economy will be poor. In addition, the surface roughness Ra of the phosphate chemical coating was set to 0.5μ.
m, but it may be 0.1 to 1.0 μm, preferably 0.5 to 0.7 μm. Roughness Ra is 0.1μm
If it is less than 1.0 μm, the adhesion with the resin film will be poor, and if it exceeds 1.0 μm, wear of the traveler will increase. In addition, by adjusting the roughness Ra in the range of 0.1 to 1.0 μm, the adhesion of the resin film is improved, and even after the resin film is worn, the resin remaining in the recesses on the ring flange surface is removed. The solid lubricant makes it possible to maintain the lubricating effect for a long period of time.

Although the thickness of the resin film 4 was set to 10 μm,
Preferably it is 5 to 25 μm. Below 5 μm,
If the lubrication effect is insufficient and exceeds 25 μm, the traveler will dig into the resin film 4 during operation, preventing the traveler from sliding and causing yarn breakage. Moreover, the processing time becomes longer, which makes it less economical and increases the production cost.

Examples of rings for spinning machines obtained as described above are shown in Table 1.

[0013]

[Table 1]

FIGS. 3 and 4 show the results of measuring the number of yarn breaks and traveler wear of the spinning machine ring of the present invention and the conventional spinning machine ring not coated with a resin film under the following spinning conditions. (Spinning conditions) Ring: 3.2mmF φ38 Spun yarn: Cotton combed English style 40th spindle rotation speed: 18500r. p. m traveler: Y
S-2/hf 4/0

Rings A, B, and C for spinning machines according to the present invention have less yarn breakage and less wear on the traveler than the conventional ring D for spinning machines, so that they can last up to 20,000 r.m. p. It is possible to operate at high speeds of m or more.

[0016]

[Effects of the Invention] The spinning machine ring of the present invention has a film thickness of 2 to 7 μm at least on the flange surface that comes into contact with the traveler.
A phosphate chemical conversion film with a surface roughness Ra of 0.1 to 1.0 μm is formed, and on top of that a resin film layer with a thickness of 5 to 25 μm is formed by mixing and dispersing solid lubricant particles. , the initial familiarity with the traveler is good, the time required to get used to it can be significantly shortened, and there is no need to replace the traveler to get used to it. Moreover, even under high-speed spinning conditions, there is less yarn breakage than at the initial stage of spinning, and spinning can be performed under normal operating conditions.

Furthermore, traveler burn and traveler scattering are significantly reduced, the traveler life is extended, and stable operation can be maintained for a long period of time. Moreover, it has excellent effects such as significantly extending the ring life.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a main part of an embodiment of a ring for a spinning machine according to the present invention.

FIG. 2 is an explanatory diagram showing the cross-sectional structure of the surface layer of the flange portion.

FIG. 3 is a relationship diagram showing the relationship between ring wear amount and operating time.

FIG. 4 is a relationship diagram showing the relationship between the number of yarn breakages and operating time.

[Explanation of symbols]

1 Ring body 2 Flange part 3 Zinc phosphate film 4 Resin film 5 Ring for spinning machine 6. Solid lubricant 7 Resin

Claims (1)

[Claims] [Claim 1] At least the flange surface that contacts the traveler is subjected to phosphate chemical conversion treatment, and the film thickness is 2 to 7 μm.
A phosphate chemical conversion film having a surface roughness Ra of 0.1 to 1.0 μm is formed, and on the surface of the phosphate chemical conversion film,
By dipping or coating a resin based on one or a mixture of epoxy resins, polyamide resins, and phenolic resins, and mixed and dispersed with one or more of molybdenum disulfide, graphite, and fluororesin as a solid lubricant. A ring for a spinning machine, characterized in that it is coated and heat-treated to form a resin film that is integrally fixed, has a thickness of 5 to 25 μm, and has a coefficient of friction of 0.3 or less.