JPS6052658A - Metal shuttle and its production - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a metal part and a method for manufacturing the same, and particularly to a metal part and a method for manufacturing the same suitable for a loom capable of high speed operation such as a water jet loom.

Composite stainless steel is generally used as the metal part for water jet looms, but in the conventional metal part,
The driving part where the weft is driven between the warp threads or the lower part of the maximum opening is significantly worn by the warp threads and easily causes reed scratches, which not only makes it impossible to increase the rotation speed of the weaving thread.
It is difficult to deal with differentiated yarns, and moreover, it is difficult to increase production efficiency because the synthetic fibers must be repaired and replaced frequently.

An object of the present invention is to prevent wear caused by synthetic warp threads used in high-speed looms such as water jet weaving machines.

The gist of the present invention is that in a composition in which a large number of metal reed feathers are arranged at predetermined intervals and integrated by knitting both ends with metal wire, on one surface of the lower part of the largest opening of the reed feathers at least near both ends of the composite, The composition is characterized by the formation of a wear-resistant protective coating made of cermet.

In a preferred embodiment, the protective coating formed on the surface of the reed feather has one end on the central side of the composite tapered in order to smooth the downward movement of the warp threads.

In another embodiment of the present invention, a protective coating is formed on one side of the lower widest opening of the feathers over the entire width of the composite WO. Furthermore, in another embodiment, a protective coating is formed on both surfaces of the lower part of the maximum opening of the reed feathers near both ends of the composite, or on both sides of the lower part of the maximum opening of the reed feathers over the entire width WO of the composite. . Note that the protective coating may be formed on the entire surface of one side or both sides of all the reed feathers, or on the entire surface of the reed feathers, but this is not preferred because the cost increases significantly.

The protective coating is formed by explosively burning fuel gas, melting and injecting cermet with the resulting flame jet, and colliding the cermet with the surface of the synthetic reed blade at high speed, and its thickness is 10 to 80 μm. , preferably 15 to 50μ. This is because if the film thickness is too thin, sufficient effects cannot be obtained, and if the film is too thick, the cost will increase. Also,
As the material for the protective coating, from the viewpoint of wear resistance and adhesion, cermets such as WC type, WC-Co type, T
Powders such as iC type, NbC type, W2C type, WC-TiC-Co type, and WC-NbC-Go type are suitable, and commercially available ones may be used as they are.

Preferably, cermet powder having an average particle size of 50 μm or less is used.

The synthesis according to the present invention has been able to solve the problems in the conventional synthesis by making it possible to achieve continuous weaving seven times more than the conventional stainless steel whole section.

This will be explained below with reference to the drawings.

In the figure, reference numeral 1 denotes a metal part made of stainless steel, in which a large number of reed feathers 2 are arranged at predetermined intervals, both ends of which are held between two pairs of presser feet 3 having a semicircular cross-section, and knitted with metal wires 4. The mounting plate 5 is brazed. In order to improve wear resistance, a protective coating 6 made of WC-Co cermet is applied to one surface of the largest opening lower part B of all the feathers of Synthesis 1.
is formed, and the end 6a of the protective coating 6 on the synthetic center side is tapered. As shown in FIGS. 2 and 3, the protective coating 6 is also formed on the side surface 2C of the reed feather, but the surface on the synthetic driving side, that is, the surface 2a where the reed feather 2 hits the weft. Since the corners are most likely to be damaged, if the protective coating 6 is formed only on the feather surface 2a, the purpose can be sufficiently achieved without forming it on the side surface 2C and the opposite surface 2b.

The flame injection type thermal spraying device for forming the protective coating includes:
As shown in FIG. 4, it consists of a torch body 1o, a nozzle 11, and a nozzle holder 12 that accommodates the nozzle 11 and is screwed onto the torch body 10, and the nozzle body 10 has a combustion chamber 13. A fuel gas supply path 14 and an oxygen supply path 15 are formed in the head portion 10a, and each is connected to a fuel gas supply source (eg, a gas cylinder, a fuel injection device, not shown). Further, a spark plug 16 is attached to the head portion 10a, explosively combusts the air-fuel mixture supplied to the combustion chamber 13, and injects high-temperature, high-pressure combustion gas toward the nozzle 11 from a plurality of injection holes 17. Injection hole 1
7 are opened in the same circle on the wall of the connection part of the nozzle 11, and a thermal spray material supply hole 18 is opened in the center of the circle, and the thermal spray material supply hole 18 is opened in the center of the circle. will be sent. This thermal spraying material is melted and atomized by high-temperature, high-pressure combustion gas, and then passed through the nozzle 11.
is injected at high speed. Although not shown in order to avoid complicating the drawing, a cooling water passage is formed in the torch main body 10 and the nozzle boulder 12 in order to cool the torch main body 10 and the nozzle 11.

In use, fuel gas, such as propylene-acetylene mixed gas or vaporized gasoline, is supplied from the supply path 14 to the combustion chamber, where it is mixed with high-pressure oxygen or high-pressure air supplied from the oxygen supply path 15, and ignited. The spark from the plug 16 causes explosive combustion, and the fuel is ejected from the injection hole 17 to the nozzle 11. At this time, the thermal spraying material supplied from the thermal spraying material supply hole 18 is melted, and the fine molten thermal spraying material is injected at an ultra-high speed.

Example 1 Using stainless steel (SUS430) reed feathers with a length of 100wn, a width of 2, and a thickness of 0.27rrrm, a length of f is used.
f) 100m+n, width (WO) 1690 rrvns
A metal part with a thickness of t) 2 mm and a reed density of 19 pieces/an was manufactured, and an aluminum masking plate was placed at a distance of about 1wn from the surface of the metal part other than the length 30cm of the bottom part of the maximum opening. Cover it with Metco's 73SF-NS (wc3
3%, Go 17%) was used as a protective coating material, and was thermally sprayed using a flame spraying device to form a protective coating with a thickness of 50 μm over the entire width WO on both the front and back surfaces of the reed feathers of the metal part.

The reason why the masking plate is slightly raised above the surface of the reed feather is to gradually reduce the thickness of the coating from the area where the protective coating is formed to the area where the protective coating is not formed, that is, to create a taper. Furthermore, the reason why a flame injection type thermal spraying device is used is that, compared to flame spraying or plasma spraying, it is possible to form finer particles and thus to form a finer and more hard protective coating.

After forming the protective film in this way, the entire width of the reed was polished with a horsehair brush to ensure smoothness of the gold reed and lead wire as specified in JISL6506 (according to the height tolerance of 300 m with respect to the lead surface). (within 0.2wm)
When it was finished and used as a metal part for a water jet loom, almost no wear due to the warp was observed even after 20,000 m of continuous weaving.

By the way, the conventional metal part made of stainless steel (SUS 430) can only weave about 3,000 ya.
If used for longer than that, scratches would occur.

Example 2 A protective coating was formed on both sides of the lower part B (30 mm) of the maximum opening of the reed feather in the medical area, and the obtained metal part was used in the same manner as in Example 1, and 18,800 m of weaving was achieved. However, no wear due to warp threads was observed on the reed feathers.

[Brief Description of the Drawings] Figure 1 is a front view of the metal part according to the present invention, Figure 2 is 1...
Metal part, 2... Reed feathers, 2a, 2b ~ Reed feather surface, 4.
... Metal wire, 6... Protective coating, B... Lower part of maximum opening.

Claims (6)

[Claims] (1) In a metal part formed by arranging a large number of metal reed wings at predetermined intervals and knitting both ends with metal wire to integrate them, a cermet A metal part characterized by forming a wear-resistant protective coating consisting of. (2) The metal part according to claim 1, wherein the protective coating is formed in a tapered shape at the central end of the reed feather. (3) The metal part according to claim 1 or 2, wherein the protective coating is formed on the surface of one side of the lower carved part of the reed feather by a maximum amount over the entire width WO of the metal part. (4) The metal part according to claim 1 or 2, wherein the protective coating is formed on both surfaces of the lower part of the largest opening of the reed feather near both ends of the metal part. (5) The metal part according to claim 1 or 2, wherein the protective coating is formed on both surfaces of the lower part of the largest opening of the reed feather over the entire width wo of the metal part. (6) After manufacturing a metal part by arranging a large number of metal feathers at predetermined intervals and knitting them with metal wire to integrate them, at least one side of the lower area of the maximum opening of the feathers near both ends of the metal part. A method for producing a metal part, which comprises forming a wear-resistant protective coating on the surface of the metal part by explosively burning fuel gas and melting and injecting cermet with the resulting flame jet. The illustration set forth in claim 6