JPH02100969A - Thread guide - Google Patents

Abstract

PURPOSE:To prolong the useful life of a thread guide and guide the running thread without damaging it in the field concerning the thread in thread making, spinning, cloth weaving, and the like by forming a hard carbon film on the thread guide substrate of a thread guide for guiding the running thread. CONSTITUTION:A thread guide substrate is formed of a triangular plate made of cemented carbide (WC-5% Co) with a guide part 1 formed of a cutout in the form of approximately the character U from the apex of one angle to the center part of the plate. A center edge part 4 is finished as a curved face, and at the other released parts, a step is provided at the edges 5 so as to facilitate the guiding of the thread. Specular finishing is applied to the guide part 1 which is then cleaned and installed in a reaction chamber under the condition of the thread guide substrate temperature of 300 deg.C and the pressure in the reaction chamber of 10<-1>torr. The output of the high frequency power of the frequency of 13.56MHz is set to 600W under the condition of the thread guide substrate temperature of 300 C and the pressure in the reaction chamber of 10<-1>torr as well as the whole quantity of methane and hydrogen gas as the raw material to be fed into the reaction chamber is set to 100scc, and the excitation gas thus obtained is brought in contact with the guide part 1 of the thread guide substrate. The hard carbon film of 10mum in the thickness is thus formed so as to obtain a thread guide. Accordingly, the thread guide excellent in abrasion resistance and with prolonged useful life can be obtained.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a yarn guide, and more specifically, it has a long service life and can be suitably used in fields related to yarn such as spinning, spinning, and weaving. , and also relates to a thread path with a low coefficient of dynamic friction with the thread.

[Prior Art and Problem to be Solved by the Invention] In fields related to yarn, such as silk reeling, spinning, and weaving, yarn guides are used to guide the traveling yarn in order to maintain the running stability of the yarn. ing.

By the way, conventionally used thread guides include those made of metals such as cemented carbide metals and ceramics such as alumina.

However, these thread guides are subject to intense rubbing by the threads running at high speed, and combined with the high heat generated by the rubbing, they are subject to significant wear, making it impossible to ensure a sufficient service life.

In addition, although conventional thread guides have been smoothed on the part that guides the thread, it cannot be said that the coefficient of dynamic friction against the thread has been sufficiently reduced, and as a result, thread breakage and thread fuzzing occur. It has the disadvantage of being easy to wake up.

On the other hand, a thread guide in which a member with diamonds is attached to a thread guide base (Utility Model Application No. 57-184853) has been reported, but the member with diamonds is damaged by the friction, high heat, etc. There was a risk of leaving.

This invention was made in view of the above circumstances.

That is, an object of the present invention is to provide a thread path that has a long service life and can guide running threads without damaging them.

[Means for solving the above problems] The structure of this invention for solving the above problem is as follows.

This thread guide is characterized by forming a hard carbonaceous film on the thread guide base-L.

A detailed description of the invention is provided below.

(1) Thread guide base There are no particular restrictions on the material of the thread guide base, as long as it is possible to form a hard carbon JA film, such as iron, nickel, chromium, manganese, vanadium, tungsten,
Metals and alloys such as thallium, molybdenum, silicon, etc.
Examples include ceramics such as tantalum silicon, molybdenum carbide, tungsten carbide, alumina, spinel, and silicon carbide.

Among these, preferred are WC-Go alloy, We-TiC-Coo alloy, and 'rJc-TiC-T.
It is a cemented carbide such as aC-Co 7'i alloy.

The shape of the yarn guide base is not particularly limited as long as it has a shape that allows a guide portion for guiding the traveling yarn to be provided.

The shape of the guide part is not particularly limited, and for example, the guide part 1 may have a groove provided in the thread guide base as shown in FIG. 1, or a groove provided in the thread guide base as shown in FIGS. 2 and 3. Examples include those in which the through holes formed in the roll form the guide part 1, or the entire roll surface also forms the guide part 1, as shown in FIG.

Note that the grooves and through holes do not need to be provided linearly;
When the guide portion is, for example, a through hole, the through hole may be curved, as shown in FIG.

This invention is made by forming a hard carbonaceous film as described below on the thread guide substrate.

(2) Hard carbonaceous film The hard carbonaceous film is a film made of diamond-like carbon and/or diamond.

The hard carbonaceous membrane is formed on the thread guide substrate.

The thickness of the hard carbonaceous film is usually 0.1 sm or more, preferably 0.5 to 30 gm.

The hard carbon film may be provided at least on the guide portion, and may be formed on the entire surface of the thread guide base, or may be formed only on the guide portion, if desired.

The present invention also includes forming the hard carbonaceous film on the thread guide substrate via an intermediate layer, which will be described below.

(3) Intermediate layer The intermediate layer has an action or function of increasing the adhesion between the thread guide base and the hard carbonaceous membrane.

The component forming the intermediate layer is not particularly limited as long as it has the above-mentioned action or function, and for example, metals of groups rVa, Va, VTa, 2, and 2 of the periodic table.
Hereinafter, it may simply be referred to as metal. ), carbides of the metals, oxides of the metals, borides of the metals, silicides of the metals, silicon, and the like.

Examples of the metal include titanium, vanadium, chromium, manganese, iron, cobalt, nickel, zirconium, niobium, molybdenum, technetium, ruthenium,
Examples include rhodium, palladium, hafnium, thallium, tungsten, rhenium, osmium, iridium, and platinum.

Note that among these, tungsten, titanium, and thallium are preferable, and tungsten is more preferable.

The carbide of the metal is not particularly limited as long as it is a carbide of the metal, but it is preferably a carbide of the same metal as the metal component of the thread guide base used. For example, if a cemented carbide is used as the thread guide base, il(7)-cahtf,
Examples include wc, NiC, Tic, Tic, MoC, and the like.

The oxide of the metal is not particularly limited as long as it is a carbide of the metal, but it is preferably an oxide of the same metal as the metal component of the thread guide base used, for example, carbide as the thread guide base. If you use alloy, WO2,
W(h, NiO, Ti01T i02, TizOr
, MoO2, MoO3, etc. The metal boride is not particularly limited as long as it is a carbide of the metal, but preferably a boride of the same metal as the metal component of the thread guide base used. For example, if cemented carbide is used as the thread guide base, WB
, W2B, NiC, TiB, MoB, MO2B, etc.

The silicide of the metal is not particularly limited as long as it is a silicide of the metal, but is preferably a silicide of the same metal as the metal component of the thread guide base used.
For example, if cemented carbide is used as the thread guide base,
WSi2, NiSi2.

Examples include Pd2Si, PtSi, MoSi2, etc.

The silicon is not limited to silicon, and may be silicon carbide.

By using the same metal, metal carbide, or silicide of the metal as the metal component contained in the thread guide base in the intermediate layer, or if the thread guide base contains silicon, the intermediate layer contains silicon. By using this, it is possible to further improve the adhesion between the thread guide base and the intermediate layer.

The thickness of the intermediate layer is usually 0.01 to 5 μm,
Preferably it is 0.05-3 km.

In addition, if the layer thickness is less than 0.01 g m, the adhesion between the thread guide base and the hard carbon material may not be observed, and even if the layer thickness exceeds 5 m, the adhesion may not be as good. You may not be able to obtain the desired effect.

Further, the number of layers of the intermediate layer may be one layer, or two layers.
It may have a multilayer structure of more than one layer.

In addition, in the case where the intermediate layer has a multilayer structure, the intermediate layers may be made of the same component, or may be made of different components.

The intermediate layer may be formed on the entire surface of the thread guide base, or in the case where the hard carbonaceous film is formed only on the guide part, it is formed at least on the part where the hard (hard) paternal film is to be formed. There may be.

In order to form such a hard 'fX material 1 layer or an intermediate layer on the thread guide substrate, the following method can be adopted.

(4) Method for forming a hard carbon film A hard carbon film can be formed on the surface of the thread guide base by bringing plasma obtained by exciting a raw material gas into contact with the thread guide base.

(I) Raw material gas A carbon source gas can be used as the raw material gas for forming a hard carbon film on the surface of the thread guide substrate.

Carbon Source Gas As the carbon source gas, gases such as various hydrocarbons, oxygen-containing compounds, nitrogen-containing compounds, etc. can be used.

Examples of hydrocarbon compounds include paraffinic hydrocarbons such as methane, ethane, propane, and butane; olefinic hydrocarbons such as ethylene, propylene, and butylene; acetylenic hydrocarbons such as acetylene and arylene; diolefinic hydrocarbons such as butadiene; Examples include hydrogen, didichloropropane, alicyclic hydrocarbons such as cyclobutane, cyclopentane, and cyclohexane, dichlorobutadiene, and aromatic hydrocarbons such as benzene, toluene, xylene, and naphthalene.

Examples of oxygen-containing compounds include ketones such as acetone, diethyl ketone, and pentuphenone; alcohols such as methanol, ethanol, propatool, and butanol; methyl ether, ethyl ether, methyl ethyl ether, methyl propyl ether, phenol ether, dioxane, etc. Ethers: Aldehydes such as formaldehyde, acetaldehyde, and benzaldehyde; Organic acids such as acetic acid, propionic acid, and succinic acid; Acid esters such as methyl acetate and ethyl acetate; Dihydric alcohols such as ethylene glycol and diethylene glycol - monoxide Examples include carbon and carbon dioxide.

Examples of nitrogen-containing compounds include amines such as trimethylamine and triethylamine.

In addition, as a carbon source, although it is not suspended, it is classified as Class 4 dangerous substances stipulated in the Fire Service Act; Class 1 petroleum such as gasoline, and Class 2 petroleum 1 such as kerosene, turpentine, ginger oil, and pine oil. Tertiary petroleum oils such as heavy oil, quaternary petroleum oils such as gear oil, cylinder oil, etc. can also be used. It is also possible to use a mixture of the various carbon compounds mentioned above.

Among these carbon sources, paraffinic t&hydrogen oxides such as methane, ethane, and propane, which are gases or have high vapor pressure at room temperature, ketones such as acetone and benzophenone, alcohols such as methanol and ethanol, carbon oxides,
Oxygen-containing compounds such as carbon dioxide gas are preferred.

Note that the raw material gas may contain hydrogen gas, water vapor, oxygen gas, etc. in addition to the carbon source gas.

By using a raw material gas that is a combination of these gases and a carbon source gas, hard coal i[ with a high diamond content can be formed at high speed.

The concentration of the hydrogen gas in the source gas is O11 to 93.9 mol% relative to the &J source gas.

The concentration of the water vapor in the raw material gas is 0.05 to 10 mol% with respect to the raw material gas.

The concentration of the oxygen gas in the raw material gas is 0.01 to 1 mol% relative to the raw material gas.

An inert gas may be mixed in the raw material gas, and the inert gas can be used as a carrier gas for the carbon source gas.

This inert gas is, for example, nitrogen gas.

Examples include helium gas, argon gas, neon gas, and xenon gas.

(II) Excitation Means As a means for exciting the carbon source gas, any method can be used from among the various methods conventionally used for synthesizing hard carbon films.

Specifically, for example, DC plasma CVD method, high frequency plasma CVD method, microwave plasma CVD method, optical CVD method, etc.
Various plasma CVD methods such as D method, hot filament method,
Examples include ion beam evaporation method and sputtering method. Among these, preferred are the various plasma C
This is the VD method.

Note that the plasma output when plasma decomposing the Coal J source gas is usually 0.05 Kw or more.

If the plasma output is less than 1 in O.05, sufficient plasma may not be generated.

Excitation Conditions To excite the carbon source gas, a reaction is usually allowed to proceed under the following conditions to form a hard carbonaceous film.

That is, the temperature of the surface of the thread guide substrate varies depending on the excitation means of the carbon source gas in the vapor phase synthesis method and the cooling of the substrate. 1 Normally, to form a hard carbon film with a high diamond content, 600 to 1,
200°C, preferably 650 to 1,100°C, and to form a hard carbon film with a high content of diamond-like carbon, the temperature is usually room temperature to 650°C, preferably room temperature to 600°C. .

The reaction pressure is usually 10-5 to +03 torr when forming a hard J&J film with a high diamond content.

Preferably 1O-3~! (1) torr, and when forming a hard carbon film with a high content of diamond-like carbon, it is usually 10 -6 to 780 tarr, preferably 4 to 10 tarr.

Note that if the reaction pressure is lower than 10-6 torr, the hard carbon film may not be deposited. On the other hand, even if it is made higher than 10' torr, a corresponding effect cannot be obtained.

By appropriately selecting the temperature or reaction pressure of the surface of the thread guide substrate in the temperature range or the reaction pressure range,
It is also possible to select the content ratio of diamond and diamond-like carbon contained in the hard carbonaceous film.

The reaction time can be appropriately set according to the formation rate of the hard carbon film so that the hard carbon film has the above thickness.

Note that the hard carbonaceous membrane may be formed on the thread guide substrate via the intermediate layer, so a method for forming the intermediate layer will be described below.

(5) Method for Forming Intermediate Layer The intermediate layer is usually formed by applying a gas obtained by exciting the metal, carbide of the metal, silicide of the metal, carbon source gas, silicon, etc. to the surface of the thread guide substrate. can be formed by contacting with.

As the excitation means, the same method as the excitation means employed when forming the hard carbonaceous film can be adopted.

Further, the intermediate layer can also be formed on the surface of the thread guide substrate by a vapor deposition method, an ion blating method, a reactive sputtering method, or the like.

When forming the intermediate layer, the surface temperature of the yarn guide substrate cannot be generally determined because the condition range varies depending on the means, the reactivity of the intermediate layer, and the melting point of the intermediate layer; The temperature is from normal temperature to 1,000°C, preferably from normal temperature to 900°C.

The reaction pressure is usually 10-7 to 10-' torr, preferably 10-6 to 1 O-2 torr.

Although the precipitation rate cannot be determined unconditionally by appropriately setting the reaction conditions within the range of the above-mentioned reaction conditions, it is usually 1 to IQOA/sec.

Under such conditions, the intermediate layer is formed on the thread guide substrate to have the thickness as described above.

As a method for forming the hard carbonaceous film on the intermediate layer-L formed in this way, a method similar to the method for forming the hard carbonaceous film directly on the external substrate is preferably adopted. be able to.

Note that, before forming the hard carbonaceous film or the intermediate layer on the thread guide base, it is preferable to subject the thread guide base to a surface treatment.

Is the surface treatment hard? has the effect of increasing the adhesion between the carbonaceous membrane or the intermediate layer and the thread guide substrate.

The surface treatment includes, for example, a method of polishing the surface of the thread guide base using a diamond slurry, a method of cleaning the surface of the thread guide base with an organic solvent, and a method of ultra-rY wave cleaning using an arbitrary solvent. Alternatively, there may be mentioned a method of employing an appropriate combination of the above methods.

Among these, a combination of a method of polishing the surface of the thread guide base using diamond slurry and an ultrasonic cleaning method, a method of cleaning the surface of the thread guide base with an organic solvent and a method of ultrasonic cleaning. A combination with is preferred.

Further, the hard carbonaceous film is provided on the thread guide substrate.

Alternatively, when the hard carbonaceous membrane is formed on the yarn guide substrate via the intermediate layer, the surface of the obtained hard carbonaceous membrane may be smoothed.

As the smoothing method, a known method such as a smoothing method in which the surface of a hard carbonaceous film is polished on an iron plate maintained at a high temperature while supplying hydrogen radicals in a hydrogen atmosphere is suitably employed. be able to.

The yarn path thus obtained has a long service life due to its excellent abrasion resistance, and has a low coefficient of dynamic friction with the yarn, so it guides the running yarn without damaging it.

[Example] In order to more specifically explain the thread path of the present invention, examples are given below.

(Example 1) Itodojin (the body is made of cemented carbide (as shown in Figure 1)
A triangular plate made of 11IG-5% Go) having a guide portion 1 with a substantially U-shaped cut from the apex of the - corner to the center of the plate was used. The center end 4 of the guide portion 1 is finished with a curved surface, and the other open end is provided with a step at the edge 5 to facilitate the introduction of the yarn.

The thread guide base is made of the same material as that used in conventional thread guides, and the guide portion 1 is mirror-finished using diamond abrasive grains having an average grain size of 0.5 μm.

The thread guide substrate was treated with Langer E solution (Medome Seiko Co., Ltd.) 10 times diluted solution (liquid temperature 50°C), then with pure water, and then with isopropyl alcohol, three times each. I did one wash at a time.

Note that the washing time per time was 60 seconds, and out of the three washings, two washings were performed [1 washing was performed in combination with ultrasonic treatment.

After installing the thread guide base that has been cleaned in this way in the reaction chamber, the thread guide base temperature is 300°C, the pressure inside the reaction chamber is 10
-'torr, the output of a high frequency power supply with a frequency of 13.5811 Hz was set to 600 W, and the total amount of methane gas and hydrogen gas as raw material gases into the reaction chamber was set to 101005e.

The concentration of the methane gas was 20% by volume.

By bringing the excited gas obtained under these conditions into contact with the guide part 1 of the thread guide base shown in FIG.
was formed and a thread path was obtained.

The yarn path thus obtained was evaluated for wear resistance and measured for the J9m coefficient.

The results are shown in Table 1.

In addition, the method shown in F was adopted for evaluation of wear resistance and measurement of friction coefficient.

The yarn path for which wear resistance has been evaluated is fixed with bolts using bolt holes 2 shown in FIG. The evaluation was made by observing the degree of deterioration.

The meanings of the symbols in Table 1 are as follows.

No deterioration of the raw silk is observed.・Ai・11-○ Fuzzing is observed on the raw silk. ...φ-Δ raw silk is cut.・Conflict・Meeting・e
e...×Measurement of dynamic friction coefficient -1 Using an automatic friction coefficient measuring machine, set the load to 2 (Ig,
The coefficient of dynamic friction between the guide section 1 of the yarn guide and the raw silk was measured.

(Example 2) Using the same thread guide base as in Example 1, the thread guide base was subjected to surface treatment in the same manner as in Example 1.

Next, after installing this thread guide substrate in a reaction chamber, the tungsten was excited by a high frequency sputtering method with the power supply output set to 300 W under the conditions that the thread guide substrate temperature was 300° C. and the pressure in the reaction chamber was 1 O-6 jorr. The obtained gas was brought into contact with the guide portion 1 of the thread guide base and the surface in its vicinity to form an intermediate layer made of tungsten and having a thickness of 0.5 ga.

Argon gas was used as the sputtering gas.

The deposition rate of the intermediate layer was 10 A/sec.

A hard carbonaceous film was formed on the intermediate layer thus obtained under the same conditions as in Example 1, and a thread path was created.

This thread path was evaluated in the same manner as in the example construction.

The results are shown in Table 1.

(Example 3) A thread guide was created in the same manner as in Example 1, except that the material of the thread guide base was changed from cemented carbide to alumina, and the thickness of the hard carbon J film was changed to 5 mm. Evaluation was made in the same manner as in Example 1.

The results are shown in Table 1.

(Example 4) The material of the thread guide base was changed from cemented carbide to alumina.
A yarn path was created in the same manner as in Example 1, and evaluated in the same manner as in Example 1.

The results are shown in Table 1.

(Comparative Example 1) Evaluation was carried out in the same manner as in Example 1, without forming a hard carbonaceous film on the guide portion of the thread guide base used in Example 1.

The results are shown in Table 1.

(Comparative Example 2) Evaluation was carried out in the same manner as in Example 1, without forming a hard carbonaceous film on the guide portion of the thread guide base used in Example 3.

The results are shown in Table 1.

[Effects of the Invention] As shown in the results in Table 1, the thread guide of this invention (1) has excellent wear resistance, which can extend the service life, and (2) has a low coefficient of dynamic friction with the thread. It is possible to provide a yarn path having advantages such as being able to prevent damage to the traveling yarn.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a thread path in an embodiment of the present invention, and FIG.
Figures 3 and 4 are perspective views of the yarn guide base. End 5・
・・Etsuji

Claims (1)

[Claims] (1) A thread guide characterized by forming a hard carbonaceous film on a thread guide base.