JPH0647384U - Reed wings for high speed loom - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a comb for a high-speed loom, which is widely adapted to various fibers from natural fibers to high-strength synthetic fibers and has dramatically improved durability. . [Structure] The surface of a thin plate-shaped base material made of stainless steel is coated with a composite plating layer composed of an electroless nickel alloy plating layer in which fine silicon particles coated with a hard carbon film by a plasma CVD method are dispersed and contained. Composed wings. [Effect] The wear of the feathers is significantly reduced, and the durability is improved. As a result, the working efficiency of the high-speed loom is remarkably improved.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a comb for a high-speed loom, and more particularly to a structure of a surface coating for improving the durability of the comb.

[0002]

[Prior art]

 "Osa", which is a part of a loom, aligns the warp threads of a woven fabric and presses the weft threads to adjust the texture. It is arranged side by side in a frame.

In high-speed looms, stainless steel tail blades are generally used. However, due to the high-speed looms and the diversification of synthetic fibers such as high-strength fibers and deformed fibers, and the use of various sizing materials, The durability of the feathers is a big issue. In other words, the wear of the reeds causes fluffing and breakage of the yarn, and it takes a great deal of money and labor to replace the reeds. Is a factor of.

Therefore, hard chromium plating or a hard compound film such as titanium carbide (TiC), titanium nitride (Ti 3 N), chromium oxide (Cr ₂ O ₃ ), tungsten carbide (WC), niobium carbide (N bC) is used. It has been proposed to coat the surface of the feathers (JP-A-60-52658).

[0005]

[Problems to be solved by the device]

 However, it is also reported that the wear of the tail feathers is a phenomenon in which the type of fiber, impact pressure, vibration characteristics, etc. are complicatedly involved, and that a coating with high surface hardness does not always give good results ( Toshiba Technical Data C-63002, 63-11-1).

Therefore, although various coating materials suitable for the fiber type and other individual conditions are coated, an improvement in durability of 2 to several times is recognized as compared with the untreated stainless base material. Not too much.

An object of the present invention is to provide a tail feather that is widely adapted to various fibers from natural fibers to high-strength synthetic fibers and has dramatically improved durability.

[0008]

[Means for Solving the Problems]

 For the above-mentioned purpose, the feather of the present invention comprises an electroless nickel alloy plating layer in which fine silicon particles coated with a hard carbon film by plasma CVD are dispersedly contained on the surface of a thin plate-shaped substrate made of stainless steel. The composite plating layer is coated to improve the abrasion resistance of the comb feathers.

[0009]

[Action]

The hard carbon film forming a part of the present invention is an amorphous carbon film containing hydrogen, which is formed by plasma CVD in a hydrocarbon gas atmosphere, for example, and has a hardness next to diamond and a high heat of about 5 times that of copper. It is also known for its conductivity and its extremely low coefficient of friction. It is also possible further to prepare the fluorinated hard carbon film partially substituted with fluorine of the hydrogen in the film by plasma treatment a hard carbon film in a fluorine gas atmosphere such as CF _4, from hard carbon film Further, it is possible to further reduce the coefficient of friction and impart a high degree of water repellency. Composite plating consisting of electroless nickel alloy plating containing silicon particles dispersed on a hard carbon film in addition to the excellent adhesion, corrosion resistance, and wear resistance unique to electroless nickel alloy plating. It has high hardness, reflecting the characteristics of the hard carbon film or the fluorinated hard carbon film, and exhibits excellent wear resistance, durability, and water repellency.

There are many unclear points about the behavior of the composite plating of the present invention in the wear mechanism of the tail feathers driven at high speed, but it is not only the fact that the surface hardness is high and the friction coefficient is small, It is thought that conductivity, vibration characteristics, and water repellency also contribute to the improvement of durability.

[0011]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings. FIG. 2 is a front view showing an example of the tail 21 to which the present invention is applied, in which a large number of thin metal blades 10 are arranged in parallel and held by a frame 20. FIG. 1 is a cross-sectional view of the main part of a comb 10 of the present invention. The composite plating layer 12 according to the present invention is coated to a thickness of about 10 μm on the surface of the stainless steel substrate 13, particularly including the impact surface 11. FIG. 3 is a schematic sectional view of the composite plating layer 12 according to the present invention. FIG. 4 is a schematic cross-sectional view of silicon fine particles 41 coated with a hard carbon film 42 to be dispersedly contained in the composite plating layer 12 of the present invention.

As a method of coating the composite plating layer 12, first, a hard carbon film 42 is formed to a thickness of about 1 μm on the surface of silicon fine particles 41 having a diameter of 0.1 to 2 μm by a plasma CVD method. The formation conditions are shown below.

Excitation gas: Methane Excitation method: High frequency (13.56 MHz) Excitation output: 300 W Gas flow rate: 30 cm ³ / min. Gas pressure: 0.1 Torr Film formation rate: 20 nm / min. Processing temperature: ≤150 ° C

At this time, in order to uniformly coat the surface of the silicon fine particles 41 with the hard carbon film 42, about 100 to 1000 g of the silicon fine particles 41 are evenly spread so as to have a thickness of 5 mm or less on the bottom of the metal container. After this metal container is placed on the excitation electrode, plasma CVD is performed while mechanically vibrating the excitation electrode, or the silicon fine particles 41 placed in the metal container are mixed with a plastic stirrer. It is desirable to perform plasma CVD while stirring. Further, after coating the hard carbon film 42, it is possible to prepare a fluorinated hard carbon film in which a part of hydrogen in the film is replaced with fluorine by continuously performing plasma treatment in a CF ₄ gas atmosphere. Silicon fine particles coated with such a hard carbon film are considered to have a structure as shown in FIG.

Next, the fine particles are dispersed in an electroless nickel alloy plating solution having the following composition so as to be 20 to 30 vol% to prepare a composite plating bath. NiSO ₄ .7H ₂ O 20 g / l NaH ₂ PO ₄ .H ₂ O 20 g / l CH ₃ COOHNa.3H ₂ O 136 g / l Sulfuric acid (1.84 g / cm ³ ) 10 ml / l PH value 5.0 Liquid temperature 90 C. Next, electroless plating is carried out by immersing the osaba 10 which has been preliminarily washed, alkali degreased and etched with acid in the above plating bath heated to about 90.degree. At this time, in order to uniformly disperse the fine particles in the plating bath, it is desirable to perform plating while mechanically stirring or circulating with a pump. The plating film thickness was 10 μm. Further, in order to further increase the surface hardness of the electroless nickel alloy plating, a heat treatment at about 400 ° C. is performed after plating. As shown in FIG. 3, the composition of the composite plating coated in this manner is that the silicon fine particles 32 coated with the hard carbon film are uniformly dispersed in the plating layer 31 in the range of 20 to 30 vol%. Have been confirmed in.

As a result of assembling the tufts 10 thus coated to form the tufts 21 and mounting the tufts on a high-speed loom and examining the durability, a comparison was made with the case where an untreated stainless steel base material was used. The order of magnitude of durability (15 to 50 times) was confirmed. At the same time, it was confirmed that the effect was effective regardless of the type of fiber.

In the above embodiment, it is effective in terms of cost to adopt the present invention only to the tails located at both ends of the tail, which are most affected by the tension of the warp threads.

[0018]

[Effect of device]

 As described above, according to the present invention, the durability of the comb is dramatically improved, and at the same time, the work efficiency of the high-speed loom is remarkably improved because it can be applied to a wide range from natural fibers to synthetic fibers.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a main part of a comb of the present invention.

FIG. 2 is a front view showing an example of a turf targeted by the present invention.

FIG. 3 is a schematic sectional view of a composite plating used in the present invention.

FIG. 4 is a schematic cross-sectional view of silicon fine particles coated with a hard carbon film to be dispersedly contained in the composite plating of the present invention.

[Explanation of symbols]

 10 Osafe 11 Impact surface 12 Composite plating layer 13 Base material 20 Frame 21 Osa 31 Electroless nickel alloy plating layer 32 Silicon fine particles coated with a hard carbon film 41 Silicon fine particles 42 Hard carbon film

Claims (2)

[Scope of utility model registration request] 1. A composite plating layer consisting of an electroless nickel alloy plating layer containing dispersed silicon fine particles coated with a hard carbon film on the surface is coated on the surface of a stainless steel thin plate-shaped substrate. Sasaha for the high-speed loom. 2. The high-speed loom sheave according to claim 1, wherein the hard carbon film is a fluorinated hard carbon film in which at least a part of hydrogen bonded in the film is replaced with fluorine. Osa feather.