JPH0143024B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of manufacturing a strand by twisting a plurality of wires, and particularly to a method of manufacturing a filament for deposition using wires such as tungsten.

FIG. 1 shows a schematic configuration of the main parts of a wire twisting machine used for manufacturing ordinary strands.

In the figure, a shaft 1 extending along the rotation axis
A barrel 12 is fixed to 1 so that it can rotate integrally with the barrel 12, and a plurality of spools 13 each having a wire 14 wound thereon are attached to the barrel 12. The wire 14 pulled out from each spool 13 is guided to the twisted wire section 17 without being twisted via a first guide 15 and a second guide 16 fixed to the shaft 11. The stranded wire portion 17 is equipped with a die having a through hole on an extension of the rotating shaft, and the through hole is tapered so as to gradually become narrower in the direction in which the wire 14 is drawn out on the inlet side of the wire 14.

In this type, the wire 14 pulled out from each spool is converged to one point on the rotation axis, and the barrel 14 is
By rotating the wires 2, the wires 14 can be automatically twisted at the convergence point to form a single strand. 18 is a take-up spool.

Of course, when manufacturing a filament for vapor deposition, a filament material such as tungsten or molybdenum is used as the wire 14, but in the past, several wires were twisted closely together, so there was no problem during vapor deposition. , it is necessary to attach another metal material for evaporation to this filament, and when the evaporation material is evaporated, the wetting of the molten evaporation material to the filament tends to be uneven, which may shorten the life until disconnection or cause the evaporation The drawback was that it caused unevenness.

The present invention aims to provide a method for manufacturing a filament for deposition in which the metal material for deposition has good wettability with respect to the filament.

Another object of the present invention is to provide a method for manufacturing a filament for deposition, in which a metal material for deposition can be easily attached.

The present invention is a method of twisting wires so that a space is created at the center axis of the wires during the wire twisting process.

Examples of the present invention will be described below.

FIG. 2 shows an embodiment of the present invention in the vicinity of the twisted wire portion.

In FIG. 2, a taper pin 21 is provided on the shaft 11 via a fixing jig 20 so as to extend on the extension line of the shaft 11 in close proximity to the die 19 in the twisted wire portion (whole illustration is omitted), and the tip of the taper pin 21 is connected to the rotation axis. It is inserted into the through hole 191 of the die 19, which is aligned with the hole 191 of the die 19. The pin 21 is made of metal and has a long mechanical strength of about 20 mm.

When twisting the wires, the lubricant adhering to the surface of the tungsten, molybdenum, etc. wire 14 used was removed in advance (CC finished).
The wires are wound onto spools, fixed on the barrel, and the two wires 14 drawn out from each spool are converged to one point on the pin 21. Then, insert the wire 14 and pin 21 into the through hole 191 of the die 19,
Move the die 19 toward the shaft 11 by about 5 mm from the part where twisting begins.

FIG. 3 shows this state in an enlarged manner.

By setting the convergence position of the wire 14 on the pin 21 in this way, the through hole 191 of the die 19
The stranded wire drawn out from the center has a space in the central axis portion as shown in an enlarged view in FIG.

Note that the twisted wire pitch is determined by the rotational speed of the barrel and the rotational speed of the take-up spool, but the twisted state changes depending on the convergence position of the wire 14 on the pin 21. That is, if the convergence position of the wire 14 is set within the through hole 191 of the die 19 as shown in FIG. 3, a normal twisted state with only a space at the central axis can be obtained; When the die 19 is moved in the direction in which the wires 14 are pulled out and the convergence position is set outside the through hole 191 as shown in FIG. Twisted wires are obtained which are tightly arranged in a constant arrangement and twisted at a constant pitch.

Now, the filament for vapor deposition obtained in this way according to the present invention is very easy to install because the space in the central shaft part can be used as a space for attaching the metal material for vapor deposition, and the attached metal material does not cover the filament. Since there are gaps between the constituent wires, the molten metal material during vapor deposition is uniformly distributed to each wire, an average wetting state is obtained, and uneven wetting is eliminated. It has been confirmed that this not only allows for uniform vapor deposition on the portion to be vapor-deposited, but also achieves a lifespan 3 to 4 times longer than that of conventional filaments, which tend to have uneven wetting.

[Brief explanation of drawings]

Fig. 1 is a schematic configuration diagram of the main parts of a conventional wire twisting machine, Fig. 2 is a diagram showing a schematic structure near the twisting part for implementing the present invention, and Fig. 3 is a further enlarged view of the main parts. Figure 4 is a diagram showing the twisted wire state obtained by this, Figures 5 and 6 are respectively,
The figure which showed the principal part of another Example, and the figure which showed the twisted wire state. In the figure, 11 is the shaft, 12 is the barrel, 13
14 is a spool, 14 is a wire, 15 and 16 are guides, 17 is a twisted wire portion, 18 is a take-up spool, 19 is a die, and 21 is a taper pin.

Claims (1)

[Claims] 1. A plurality of spools wound with filament wire are fixed on a rotating table attached to a shaft extending along the rotating shaft, and the stranded wire portion is provided with a die having a through hole on the rotating shaft. In a device for twisting wires pulled out from each spool, a taper pin is provided on the shaft near the die, and the tip of the taper pin is inserted into the through hole of the die, and the taper pin is placed at a predetermined position. A method for producing a filament for vapor deposition, characterized in that the wires are converged and twisted.