JPH07189052A - Ring for spinning machine - Google Patents

Abstract

PURPOSE:To provide a ring for a spinning machine, having smooth contact with a traveler to produce little trouble of yarn breakage, exhibiting a largely extended ring life and extremely improved corrosion resistance and free from generation of pollution problem during its production. CONSTITUTION:In this ring for a spinning machine, the surface of flange 2 is washed with an acid. On the acid-treated surface, an iron phosphate coating 3 is formed and further a chromate coating 4 is formed on it by a chromic-acid treatment. A resin coating 7 is formed on the surface of the chromate coating 4 by mixing a binder 5 consisting of one kind of a resin selected from a phenolic resin, an epoxy resin and an amino resin or a mixture of these resins with a solid lubricant 6 of PTFE.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spinning machine ring which is used in a spinning machine and a twisting machine and has improved wear resistance, familiarity and corrosion resistance, especially in a high speed machine.

[0002]

2. Description of the Related Art In a conventional spinning ring, a low carbon steel material is generally used as a surface hardening method for a flange portion, and after turning to form a ring, carburizing is performed to obtain a surface carbon content of 0.8.
It is formed by quenching and tempering after adjusting the content to about 1.0%. Under high speed spinning conditions in today's spinning mills,
Even if the above ring was used, early seizure and scattering of the traveler, and further, the ring life was greatly shortened, so for example, an iron phosphate coating was formed on the flange surface, and the surface of the iron phosphate coating was formed. A ring (Japanese Patent Laid-Open No. 5230/1993) coated with a resin layer containing a solid lubricant has been devised.

[0003]

[Problems to be Solved by the Invention] In today's spinning mills,
We are striving to save labor and maintain high production. Therefore, spinning conditions are becoming faster and faster, and friction conditions are becoming severer in rings and travelers. In order to carry out a stable continuous operation, it is necessary to start the operation at a low rotation speed and gradually increase the rotation while frequently repeating the traveler exchange, that is, a familiar operation of the ring and the traveler. The familiar operation must be carried out for a long period of time so that the above high-speed spinning conditions are achieved. Further, in the high-speed range above a certain level, the conventional spinning ring has a problem that even after a long-term familiar operation, traveler burning and scattering are increased, the yarn is often broken, and stable operation cannot be performed.

Further, there is a problem that the life of the traveler and the life of the ring are still insufficient under the high-speed spinning condition. Further, since the conventional spinning ring has no rust preventive power, it is necessary to apply rust preventive oil and store it. Wipe this oil off one by one before use. If the oil is completely removed by washing with a solvent or the like, the lubrication at the initial stage of use cannot be obtained, the familiar operation cannot be performed, and the traveler is burnt, which cannot be used at all. Therefore, it is necessary to manually wipe the rust preventive oil one by one, but this work requires a great deal of labor and cost.

Further, some synthetic fibers such as acrylic synthetic fibers contain chloride, and in this case, there is a problem that chlorine gas is generated due to heat generation due to contact with a traveler to corrode the ring. Further, in conventional ring manufacturing, trichloroethane is used for degreasing and cleaning as a pretreatment for surface treatment, but when trichloroethane vaporizes, it destroys the ozone layer, which is a problem in terms of global environmental protection.

[0006]

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and the first invention is to subject at least the flange surface in contact with the traveler to a pickling treatment in advance, An iron phosphate film having a film thickness of 0.1 to 2 μm is formed, and a chromate film having a film thickness of 0.1 to 1 μm is formed by further performing chromic acid treatment. Phenolic resin is formed on the surface of the chromate film, A resin obtained by mixing and dispersing one or a mixture of an epoxy resin and an amino resin as a binder and PTFE as a solid lubricant,
It is coated by dipping or coating, and integrally fixed by heat treatment. It has a thickness of 5 to 25 μm and a friction coefficient of 0.3.
A ring for a spinning machine having the following resin film formed thereon.

A second aspect of the present invention is to form a triiron tetraoxide film having a film thickness of 1 to 4 μm on at least the surface that comes into contact with the traveler, and then select one of phenol resin, epoxy resin and amino resin from the surface. Alternatively, a resin obtained by mixing and dispersing the mixture as a binder and PTFE as a solid lubricant,
It is coated by dipping or coating, and integrally fixed by heat treatment. It has a thickness of 5 to 25 μm and a friction coefficient of 0.3.
A ring for a spinning machine having the following resin film formed thereon.

According to a third aspect of the present invention, at least the surface which comes into contact with the traveler is based on concave portions having no convex portions, and the concave portions are formed with no random orientation and with randomness.
In addition, after processing to a satin finish such that the surface roughness Ra becomes 0.01 to 0.2 μm, one or a mixture of phenol resin, epoxy resin, amino resin is used as a binder, and PT
For spinning machines in which resin mixed with FE as a solid lubricant is coated by dipping or coating, and integrally fixed by heat treatment to form a resin film with a thickness of 5 to 25 μm and a friction coefficient of 0.3 or less. It's a ring.

The iron phosphate coating should have a thickness of 0.1 to 2 .mu.m. If the thickness is less than 0.1 .mu.m, unevenness in the formation of the coating is likely to occur, and the adhesion to the ring body is lowered, and the thickness exceeds 2 .mu.m. And the processing time is long and it becomes economically poor. Further, it is suitable that the thickness of the chromate film is 0.1 to 1 .mu.m. If it is less than 0.1 .mu.m, unevenness in the film formation is likely to occur, and if it exceeds 1 .mu.m, the treatment time is long and the economy is poor.

The thickness of the resin film is preferably 5 to 25 μm, and if the thickness is less than 5 μm, the lubricating effect is not sufficient.
If the thickness exceeds μm, the traveler will bite into the resin film during operation, and the traveler will not slide, causing thread breakage. Moreover, the processing time becomes long, the economic efficiency deteriorates, and the production cost becomes high.

[0011]

【Example】

(Example 1) As shown in FIG. 1, a low carbon steel containing C: 0.1% was cut and formed into a predetermined ring shape, and then carburized to obtain a carbon concentration on the surface of 0.6- Then, the ring body 1 is formed by quenching and tempering.
In some cases, chromium bearing steel is used and only quenching and tempering is performed without carburizing. At least the flange portion 2 of the ring body 1 formed as described above is alkali degreased with an alkaline cleaner such as sodium hydroxide or sodium carbonate, and then immersed in 5 to 25% hydrochloric acid for 2 to 20 minutes, and then about By immersing in an aqueous solution containing phosphoric acid and bromic acid heated to 80 ° C. for about 30 seconds to 3 minutes, an iron phosphate coating 3 is formed on the surface to a thickness of 0.1 to 2 μm as shown in FIG. After that, a chromate film 4 is further formed on the surface by further immersing in a chromic acid solution. Ring body 1 on which the above iron phosphate and chromate film is formed
Is preheated at 60 to 230 ° C. for 10 to 60 minutes, and then the resin 7 in which PTFE 6 as a solid lubricant is mixed and dispersed is applied to the phenol resin 5 by spraying, and the temperature is 150 to 230 ° C.
The film was heated at a temperature of 20 to 60 minutes and baked to form a spinning machine ring 8 in which a resin film 7 having a thickness of 10 μm and a coefficient of friction of 0.2 was integrally fixed to the surface of the ring body 1.

Incidentally, the pickling treatment with hydrochloric acid is carried out in order to eliminate subsequent treatment variations of the iron phosphate coating and form a uniform coating. Further, the iron phosphate coating treatment provides a clean surface free from oil and fat or rust as a resin coating base, improving the adhesion of the resin coating. Further, the iron phosphate coating prevents the propagation of rust due to the action of the metal in the poles on the poles, increasing the durability and rust prevention of the resin coating. Also,
Chromic acid treatment was applied after forming the iron phosphate film, and a chromate film was formed on the surface. By this, pinholes in the iron phosphate film were sealed, corrosion resistance was further improved, and the rust prevention effect of the resin film was doubled. It is a thing. In addition, since the chromate film is an amorphous film, it has the effect of improving the adhesiveness of the resin. By the method of forming a composite film of an organic acid and a metal salt of titanium, zirconium, fluorine or the like (non-chromate treatment) instead of forming a chromate film, the treatment can be performed without discharging harmful substances. The phenol resin used as the binder has good adhesion to the iron material and contributes to the improvement of corrosion resistance. Further, since the resin itself is relatively hard and has excellent slipperiness, it further promotes the solid lubrication effect of the dispersed and mixed PTFE.

(Embodiment 2) After degreasing at least the flange portion 2 of the ring body 1 shown in FIG.
% Hydrochloric acid for 2 to 20 minutes, and then a solution of 30 to 50% caustic soda in which an oxidizing agent such as sodium nitrite and potassium chloride is poured into a bath heated to about 130 to 150 ° C., As shown in FIG. 3, a ferrosoferric oxide film 9 is formed on the surface so as to have a thickness of 0.5 to 3 μm. A resin 7 in which PTFE 6 as a solid lubricant is mixed and dispersed in an epoxy resin 5 is applied by spraying to the ring body 1 on which the above-mentioned iron oxide black coating 9 is formed, and baked at a temperature of 150 to 230 ° C. for 20 to 90 minutes and baked. Processed and ring body 1
Resin film 7 with a thickness of 10 μm and a friction coefficient of 0.2 on the surface of
To form a ring 8 for a spinning machine in which

The pickling treatment with hydrochloric acid is carried out in order to eliminate the process variation of the ferric oxide film and to form a uniform film. Further, the ferrosoferric oxide film exhibits a good rust preventive power as a resin coating base. Further, since the film has a porous structure, when a resin film is formed on the surface of the film, the resin is impregnated into the pores, which serves to improve the adhesion between the base metal and the resin film. is there. The epoxy resin used as a binder forms a hydrogen bond with the metal surface oxide film and firmly adheres to it. Therefore, it exhibits extremely strong adhesion in combination with the above-mentioned iron oxide black coating. In addition, since the resin itself is tough and has excellent wear resistance, a film having extremely excellent slidability is formed in combination with the solid lubricating effect of PTFE.

(Embodiment 3) After degreasing at least the flange portion 2 of the ring body 1 shown in FIG.
% Hydrochloric acid for 2 to 20 minutes, and then a solution of 30 to 50% caustic soda in which an oxidizing agent such as sodium nitrite and phosphate is added is immersed in a bath heated to about 130 to 150 ° C. As shown in FIG. 3, a ferrosoferric oxide film 9 is formed on the surface so as to have a thickness of 0.5 to 3 μm. Resin 7 in which PTFE 6 as a solid lubricant is mixed and dispersed in amino resin 5 in ring body 1 having the above-mentioned iron oxide black coating formed thereon
Is applied by spraying at a temperature of 150 to 230 ° C for 2
A ring 8 for a spinning machine was constructed by integrally bonding a resin film 7 having a thickness of 10 μm and a friction coefficient of 0.2 on the surface of the ring body 1 by heating for 0 to 90 minutes for baking.

The pickling treatment with hydrochloric acid is carried out in order to eliminate subsequent treatment variations of the ferric oxide coating and form a uniform coating. Further, the ferrosoferric oxide film exhibits a good rust preventive power as a resin coating base. Further, since the film has a porous structure, when a resin film is formed on the surface of the film, the resin is impregnated into the pores, which serves to improve the adhesion between the base metal and the resin film. is there. There are several types of amino resins used as binders such as unia resin, melamine resin, guanamine resin, etc., but all of them have stickiness in the resin themselves, and are extremely strong in combination with the porous structure film of ferrosoferric oxide. It exhibits adhesion. Also, the hardness is high and P
Due to the solid lubricating effect of TFE, a film having extremely excellent friction characteristics is formed.

(Embodiment 4) At least the flange portion 2 of the ring body 1 shown in FIG. 1 is sandblasted and barrel polished to have a surface roughness Ra of 0.11 and no protrusions as shown in FIG. A matte surface 10 was formed. After degreasing the ring body 1 with an alkali, a resin 7 in which PTFE 6 as a solid lubricant is mixed and dispersed is applied to the epoxy resin 5 by spraying, and the temperature is set to 150 to 230 ° C. for 20 to 9 ° C.
A ring 8 for spinning machine was constructed by integrally bonding a resin coating 7 having a thickness of 10 μm and a friction coefficient of 0.2 on the surface of the ring body 1 by heating for 0 minutes for baking.

When a resin film is formed on the matte surface that does not have a convex portion, the resin is impregnated into the recesses that are made to exist innumerable on the surface, and the film strongly adheres to the base material. In addition, unlike ordinary matte surface, the traveler runs smoothly because it has no protrusions. Further, the lubricating effect of the resin impregnated in the recess can be maintained for a long period of time.

(Embodiment 5) At least the flange portion of the ring body 1 shown in FIG. 1 is sandblasted and barrel-polished to have a surface roughness Ra of 0.11 and has no convex portion, as shown in FIG. Formed a surface 10. The ring body 1 has an amino resin 5 and PTFE 6 as a solid lubricant.
Resin 7 mixed and dispersed by spraying
It is heated at a temperature of ~ 230 ° C for 20 to 90 minutes and baked, and the surface of the ring body 1 has a thickness of 10 µm and a friction coefficient of
A ring 8 for a spinning machine was formed by integrally fixing the 0.2 resin film 7.

FIG. 5 shows the results of measuring the number of yarn breakages of the spinning ring examples 1 to 3 and 5 of the present invention and the conventional spinning ring under the following spinning conditions.

(Spinning conditions) Ring: 3.2 mmF φ38 Spinning yarn: Cotton comb, English number 40, Spindle speed: 18,500 r.p.m. Traveler: YS-2 / hf 4/0

The spinning rings 1, 3 and 5 of the present invention have a smaller number of yarn breakages than the conventional rings, so that they are 20,000 rpm.
Operation in the above high speed range is possible. Table 1 shows the results of the corrosion resistance test carried out by a salt spray test (JIS Z2371, scratches were formed on the film with a cutter).

[0023]

[Table 1]

The corrosion resistance of the rings of Examples 1, 2 and 3 is remarkably improved as compared with the conventional one, but that of Examples 4 and 5 is lowered.

Next, Table 2 shows the results of a cross-cut tape peeling test for adhesion.

[0026]

[Table 2]

It can be seen that the spinning ring of the present invention has remarkably improved adhesion as compared with the conventional product.

Table 3 shows comparative data on the measurement of spinning tension (g). The spinning conditions are as follows.

(Spinning conditions) Ring: 3.2 mmF φ41 Spinning yarn: Cotton comb 40th number Spindle speed: 18,000 r.p.m. Traveler: YS-2 / hf 4/0

[0030]

[Table 3]

The spinning ring of the present invention is stable for a long period of time at a low spinning tension as compared with the conventional product.

[0032]

EFFECTS OF THE INVENTION The spinning ring of the present invention having the above-mentioned structure has a good initial familiarity with the traveler, can significantly shorten the familiarization time, and does not require a traveler exchange for acclimatization. Become. Moreover, even under high-speed spinning conditions, yarn breakage is less than in the initial stage of spinning, and spinning under normal operating conditions becomes possible. In addition, the burning of travelers and the scattering of travelers are significantly reduced, extending the life of travelers.
Stable operation can be maintained for a long time. In addition, it has an excellent effect that the ring life is greatly extended. Further, since the spinning ring of the present invention has an anticorrosion effect, by eliminating the need to apply antirust oil,
This has the effect of eliminating the work of wiping off the rust preventive oil before operation, which contributes to the reduction of maintenance costs at the spinning factory. Further, the above-mentioned excellent lubrication effect is exhibited even without any oil.

Further, some synthetic fibers such as acrylic synthetic fibers contain chloride, and in this case, chlorine gas is generated due to heat generation due to contact with the traveler, and there is a problem that the conventional ring corrodes. However, the ring of the present invention has significantly improved corrosion resistance. Furthermore, in the conventional ring manufacturing, trichloroethane is used for degreasing cleaning as a pretreatment for surface treatment, but when trichloroethane vaporizes, it destroys the ozone layer, which is a problem in terms of protecting the global environment. Since such a substance is not used in the manufacturing process of the spinning ring, the invention has an effective effect on pollution control.

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part showing an embodiment of a spinning machine ring of the present invention.

FIG. 2 is an explanatory view showing a cross-sectional structure of an example of a surface layer of a flange portion.

FIG. 3 is an explanatory view showing a cross-sectional structure of another embodiment of the surface layer of the flange portion.

FIG. 4 is an explanatory view showing a sectional structure of another embodiment of the surface layer of the flange portion.

FIG. 5 is a relationship diagram showing the relationship between the number of yarn breakages and the operating time.

[Explanation of symbols]

 1 Ring Body 2 Flange 3 Iron Phosphate Film 4 Chromate Film 5 Base Resin 6 Solid Lubricant Fine Particles 7 Resin Film 8 Spinning Ring 9 Tetrasodium Oxide Film 10 Pear Ground

Claims (3)

[Claims] 1. A film thickness of at least 0.1 after being subjected to a pickling treatment in advance on at least a flange surface which comes into contact with a traveler.
A 2 μm iron phosphate film is formed, and a chromate film with a film thickness of 0.1 to 1 μm is formed by further performing chromic acid treatment. The surface of the chromate film is made of phenol resin, epoxy resin, or amino resin. A resin prepared by mixing and dispersing one kind or a mixture of PTFE and a solid lubricant as a binder is coated by dipping or coating, and is integrally fixed by heat treatment, and has a thickness of 5 to 25 μm.
A spinning ring characterized by forming a resin film having a coefficient of friction of 0.3 or less at m. 2. At least a surface in contact with the traveler,
After forming a ferrosoferric oxide film having a film thickness of 1 to 4 μm, a resin obtained by mixing and dispersing PTFE as a solid lubricant with one or a mixture of phenol resin, epoxy resin and amino resin as a binder is formed on the surface. A ring for a spinning machine, characterized in that it is coated by dipping or coating and is integrally fixed by heat treatment to form a resin film having a thickness of 5 to 25 μm and a coefficient of friction of 0.3 or less. 3. At least a surface in contact with the traveler,
Basically, there are no convex parts and concave parts are basic, and the concave parts do not have a certain directionality and are formed with randomness and surface roughness.
After processing to a satin finish such that Ra becomes 0.01-0.2 μm,
Phenol resin, epoxy resin, or amino resin is used as a binder or a mixture, and a resin in which PTFE is mixed and dispersed as a solid lubricant is coated by dipping or coating, and heat treatment is performed to integrally fix the resin to a thickness of A ring for a spinning machine, wherein a resin film having a friction coefficient of 0.3 or less with a thickness of 5 to 25 μm is formed.