JPH06200451A - Abrasion-resistant dent and its production - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide an abrasion-resistant reed wing having a coating film such as TiN or TiC having excellent abrasion resistance and corrosion resistance at a low manufacturing cost, and an economical vapor deposition method for the coating film. With the goal. [Structure] A reed blade 1 for a loom in the form of a thin plate piece, in which a tip end surface 3 of the plate piece and a side surface 7 in the periphery thereof are thicker than other portions by wear-resistant vapor deposition coating. It is characterized by As an example of the vapor deposition coating method, a film is formed by facing the target with the reed wing tip surface 3 by a PVD method. At that time, since a large number of reeds 1 can be arranged side by side with a certain degree of denseness, the productivity of film attachment is increased. Therefore, the manufacturing cost of the reed is reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reed wing for a loom and a method for producing the reed, and in particular, a reed wing suitable for an air jet or a water jet loom, which is excellent in wear resistance and corrosion resistance, and imparts wear resistance. The present invention relates to a surface treatment method for.

[0002]

2. Description of the Related Art Reeds are thin blade-shaped members constituting reeds used in weaving machines and warping machines, and a large number of the reeds arranged in a comb shape and fixed to a rectangular frame is called a reed. Reed
It adjusts the position of the warp thread that passes between each reed and presses the weft thread to adjust the texture of the cloth. Generally, reeds are made of a plate material made of an iron-based material such as stainless steel, but wear is likely to occur because they are in direct contact with the warp threads. When the reed wing is worn, the yarn that comes into contact with the worn portion is fluffed, which reduces the texture of the finished cloth. In addition, it may cause the weft yarn to fly poorly or break, resulting in deterioration of quality and reduction of loom operating efficiency. Recently, new hard fibers have been used for textiles, and the environment in which reeds are used has become more severe.

As one method of preventing the wear of reed blades,
There is a method of forming a smooth hard material surface layer on the reed surface. The characteristics required for the surface layer to be formed are as follows. 1) It has abrasion resistance that sufficiently resists the friction of the warp. 2) The surface is smooth. 3) Since the reed dents follow the movement of the warp yarns, it must have strong adhesion so that the surface layer does not peel off from the base material due to this bending. 4) The thickness of the surface layer is relatively thin because the space between the reeds is small. 5) Must have corrosion resistance to water and oils.

As a method of forming a surface layer on the surface of the reed, there are a hard chrome plating method, a method of forming chromium oxide described in JP-A-1-283380, and the like.
PVD method (physical vapor deposition method) and CVD method (chemical vapor deposition method)
Ceramic coating by such as is also attempted.

[0005]

The hard chrome plating method, which has been most widely used in the past, gives a coating having a relatively high abrasion resistance, but the chemical resistance of the coating is insufficient, so that the tying force of the yarn is reduced. It may be attacked by the oil that is impregnated into the yarn to enhance it. In addition, many other conventional techniques including this hard chrome plating have problems in cost and have not been put to practical use. For example, in a conventional ceramic coating by a vapor deposition method such as a PVD method or a CVD method, although the surface layer obtained has sufficiently excellent properties such as wear resistance and corrosion resistance, the reed wing is a relatively small part,
It was difficult to process a large amount of each reed. Therefore, there is a problem in economic efficiency, and vapor deposition ceramic coating has not been put to practical use.

The present invention provides Ti having excellent wear resistance and corrosion resistance.
An object of the present invention is to provide a wear-resistant dent blade having a coating film of N, TiC or the like at a low manufacturing cost, and an economical vapor deposition method for the coating film.

[0007]

Means for Solving the Problems The inventors of the present invention have studied in detail the abrasion phenomenon of the reeds, and as a result, the abrasion of the reeds caused by friction with the warp causes contact between the reed and the warp with a contact angle. Therefore, it was discovered that the wear points were concentrated in a part such as the vicinity of the edge of the reed wing. In other words, the coating is required only near the edges of the reed wing, and the same performance as when the wear resistance of the entire reed is improved by improving the wear resistance of that part. The present invention has been found to have the idea of the present invention.

The abrasion-resistant reed blade of the present invention is a thin reed-shaped reed blade for a loom, in which the tip end surface of the reed piece and the peripheral side surface thereof are thicker than other parts. It is characterized by being coated by wear-resistant vapor deposition. The above-mentioned "other portion" may be thinner than the above-mentioned tip end surface or the like by abrasion-resistant vapor deposition coating, or the portion where abrasion does not matter may not be so coated.

Further, the method for producing a wear-resistant dent blade according to the present invention is characterized in that the wear-resistant coating is deposited by vapor deposition with the tip end surface facing a vapor deposition source.

The method of applying the abrasion resistant coating to the reed wing of the present invention is a vapor deposition method such as a vacuum vapor deposition method, a chemical vapor deposition method (CVD) or a physical vapor deposition method (PVD). This is because it is a method suitable for coating an abrasion resistant substance (ceramics or the like) with good adhesion. Among them, PVD methods such as ion plating and sputtering are particularly preferable.
Since the PVD method has a drawback that the coating has a directionality and a portion which is behind the vapor deposition source is hard to be coated, the reed wing having the PVD film has not been put to practical use. However, the present invention positively utilizes this drawback to provide a highly productive ceramic coating method for reed wing.

The PVD method is not particularly limited, but reactive ion plating is particularly preferable. This is because the coating speed is high and the adhesion is high. When the film is formed by the CVD method, the reeds are arranged almost perpendicular to the growth direction of the surface layer, that is, the reaction gas reaches the tip of the reeds first. As a concrete method of the CVD method, a method that does not require a high temperature (700 to 1200 ° C.) treatment that deteriorates elasticity of the reed base material, for example, plasma CVD is preferable.

The material for coating the reed wing is not particularly limited as long as it can be coated by the PVD method or the like and is excellent in abrasion resistance and corrosion resistance. From the viewpoint of economy and difficulty of coating technology, TiN, TiC and the like are preferable.

When coating, if the reed blades are arranged vertically with respect to the vapor deposition source and the tip surface of the reeds faces the vapor deposition source, the vapor-deposited film is thick on the tip surface and the side surface around it. Stick to. In the vapor deposition method such as the PVD method, there is no problem even if the object to be coated which is used for improving the uniformity of the coating is rotated or moved in parallel. Further, even if the reed blade is tilted so as to deviate from the vertical with respect to the vapor deposition source, there is no problem as long as it is a periodical movement centered on the vertical position. The arrangement of the reeds is preferably such that the distance between the reeds is about 0.4 mm or more in order to enable coating not only on the end faces of the reeds but also in the vicinity of the ends. Furthermore, if the distance between the reeds is increased, the coated area can be increased. However, in order to process the product with good production efficiency, it is better to arrange the distance between the reed blades as small as possible. Desirably, the distance between the reeds is 0.4 to
If the thickness is 1.0 mm, it is practical because about 2 to 3 mm is coated from the end surface of the reed wing.

The coated reed wing arranged perpendicular to the vapor deposition source has the thickest end face and is coated. In addition, the side surface is also coated over several to several tens of mm from the end surface. The area to be coated depends on the distance between the reeds, the coating method, the substance, and the conditions.
It is not uniform due to the structure of the coating equipment,
If the coating method and coating material are the same,
The higher the pressure during coating and the greater the distance between the reeds, the wider the coating area. However, the influence of coating conditions such as pressure during coating is relatively small, and is mainly governed by the distance between the reeds.

If the coating is carried out under the same conditions, the surface layer coated on the reed wing will have the same substance as that obtained when the other coated parts are coated. Therefore, if the obtained surface layer has sufficient abrasion resistance against abrasion with the warp, the coating conditions can be the same as those applied to other parts. Further, pretreatment such as ion bombardment for removing dirt and oxide film on the surface of the reed wing or preliminary coating for strengthening adhesion may be performed.

[0016]

EXAMPLES Examples of the present invention will be described below with reference to the drawings and experimental results. FIG. 1 is a perspective view showing a reed wing for a water jet according to an embodiment of the present invention. The reed wing 1 is in the form of an elongated thin plate piece (blade shape). Reed 1
The surfaces of the tip surface 3 and the side surface 7 around the tip are covered with a wear resistant film 5. The dimensions of the reed wing of this embodiment are 0.23 mm in thickness, 4 mm in width and 105 mm in length. The material of the main body is stainless steel (SUS304). To this reed,
A TiN sputtering film was applied under the conditions described below.

FIG. 2 shows the P of reed wing according to an embodiment of the present invention.
It is a figure which shows the state which is performing VD coating. The reeds 1 are attached to the fixing jig 11 at a predetermined interval L in a comb shape. At this time, the tip surface 3 of the reed wing 1 faces the target 13. In other words, the reed wing 1 is arranged so as to form a wall perpendicular to the surface of the target 13. The reed 1 and the target 13 are housed in the chamber 10 of the sputtering apparatus. Chamber 1
The inside of 0 is evacuated by a vacuum pump (not shown). Ar as a discharge gas for sputtering and N ₂ as a reaction gas are supplied into the chamber at an appropriate pressure and flow rate.

The TiN coating was carried out by the reactive sputtering method with the above setting in the high frequency magnetron cathode type sputtering apparatus.
Target 13 is a pure Ti plate, target power density is 5 W / cm ² , chamber pressure (during coating) 8
The film was formed under the conditions of m Torr and Ar gas / N ₂ gas ratio of 1 / 0.18. The total film deposition area was about 100 cm ² . The mounting distance L of the reed 1 is 0.4, 0.8, 1.2
The state with the film was observed by changing the value to mm.

FIG. 3 is a graph showing the relationship between the spacing between the reeds during coating (horizontal axis) and the width of the coating formed on the side surfaces of the reeds (vertical axis). The width of the coating was measured visually (change in color). If the distance between the reeds is small, the sputtered Ti atoms do not reach the depths of the side surfaces of the reeds, and the film width on the side surfaces is narrow. When the distance is 1.2 mm, the coating covers almost the entire width of the side surface of the reed wing.

FIG. 4 is a diagram in which the TiN film thickness when the dent spacing is 0.8 mm (marked with Δ) and when the dent spacing is 1.2 mm (marked with) is plotted by the distance from the tip of the dent. In both cases, the film thickness is about 2 μm at the tip, but it decreases with increasing distance from the tip. In this example, both of them had good wear resistance, so that the film thickness within 0.5 mm from the tip surface was 1
It means that the coating should be at least μm. The hardness of the TiN coating was Vickers hardness (Hv) 2300 at the thickest portion of the end face.

A width of 1 using these coated reed wing and uncoated stainless steel reed wing
A 000 mm reed was assembled and weaving was actually performed, and the amounts of wear of both were compared. The weaving was performed at a loom speed of 800 rpm for 20 hours using a processed polyester 50D-24F non-paste as a thread. Table 1 shows the wear depth of the most worn part after weaving. As is clear from this result, the reed wing produced by the present invention has a much smaller amount of wear than the conventional stainless steel and has excellent wear resistance.

[0022]

[Table 1]

In the case of coating the entire reed wing like the conventional treatment, when the reed wing is arranged horizontally so that the reeds do not overlap each other, that is, the side of the reed is directed toward the target surface, the treatment is performed in this embodiment. The apparatus used in 1) can process only a maximum of 26 sheets per batch. However, when the distance between the reeds of the method of the present invention is 0.8 mm, it is possible to treat 101 reeds by one treatment, and it is clear that the treatment efficiency is about 4 times and the economy is excellent. Became.

[0024]

As is apparent from the above description, the reed wing and the manufacturing method thereof have the following effects. Since the tip end surface, which requires wear resistance, and the side surface around it, have wear resistant coatings, the life of the reed wing is extended. In addition, it is possible to prevent problems in the loom and improve the quality of products.

Since only the portion requiring abrasion resistance is coated and the PVD method with poor throwing power can be coated from the end face side of the densely arranged reed blades, the coating amount per batch can be made larger than before. Can be increased by several steps. As a result, the film-forming productivity is improved, and the PVD coating, which has been difficult to apply in terms of cost, can be used as a wear-resistant coating for reed wing.

[Brief description of drawings]

FIG. 1 is a perspective view showing a reed wing for a water jet according to an embodiment of the present invention.

FIG. 2 is a diagram showing a state in which PVD coating is applied to the surface of a reed wing according to an embodiment of the present invention.

FIG. 3 is a graph showing the relationship between the spacing between the reeds during coating (horizontal axis) and the width of the coating formed on the side surface of the reeds (vertical axis).

[Fig. 4] When the reed wing spacing is 0.8 mm (marked x) and 1.2
It is the figure which plotted the TiN film thickness in mm ((circle) mark) by the distance from the reed blade tip.

[Explanation of symbols]

 1 Reed wing 3 Tip surface 5 Coating 7 Side surface around tip 10 Chamber 11 Fixing jig 13 Target

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Nobuyoshi Okato Inventor Nobuyoshi Okato 4-2 Kojima-cho, Kawasaki-ku, Kawasaki-shi, Kanagawa Nihon Metallurgical Industry Co., Ltd. Research & Development Headquarters Technical Research Center (72) Goshi Kamiya Kawasaki, Kanagawa 4-2 Kojima-cho, Kawasaki-ku Nihon Metallurgical Industry Co., Ltd.

Claims (4)

[Claims] 1. A reed blade for a loom in the form of a thin plate piece, wherein the tip end surface of the plate piece and the peripheral side surface thereof are thicker than other portions by wear-resistant vapor deposition coating. Abrasion resistant reed wing. 2. The physical vapor deposition method (PV
The abrasion-resistant reed blade according to claim 1, which is D). 3. The method for producing a wear-resistant dent blade according to claim 1, wherein the wear-resistant coating is vapor-deposited with the tip surface facing a vapor deposition source. 4. The method of vapor deposition coating is chemical vapor deposition (CV).
The method for producing an abrasion-resistant reed wing according to claim 1, wherein the treatment is performed in a posture such that the tip surface is in contact with the reaction gas flow first.