JPS6211933Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for producing foil pieces of metal or similar materials directly from molten material. Conventionally, this type of manufacturing equipment was produced by
There is a device such as that described in Publication No. 38927, and the device described in this publication includes a disc or cylindrical casting tool (herein referred to as a disk) that rotates at high speed around a central axis, and The molten material is injected onto the outer circumferential surface of the disk rotating at high speed, and the molten material is injected onto the outer circumferential surface of the disk. After at least partial solidification, linear or strip filaments are produced directly from the molten material by centrifugal force into the air for further cooling. Furthermore, Japanese Patent Laid-Open No. 56-154272 discloses that a disk having a large number of serrated protrusions at a predetermined pitch on its outer circumferential surface is rotated, and the serrated protrusions on the outer periphery are brought into contact with the liquid surface of a molten material pool. It is described that foil pieces can be produced directly from the molten material by at least partially solidifying the molten material deposited on the serrations by centrifugal force and then cooling it in the air. has been done. Based on the above-mentioned conventional technology, a plurality of serrated protrusions are provided on the outer circumferential surface of the disk at predetermined pitches and spaced apart in the circumferential direction. It is possible to produce foil pieces directly from molten material by injecting the material through an orifice with gas pressure. As shown in FIG. 1, such a foil piece manufacturing device
It is equipped with a disk 2 which is rotated at a high speed of, for example, 2000 rpm by a central rotating shaft 1, and this disk 2 has, for example, a disk or cylindrical shape with a diameter of 300 mm, and has a large heat capacity and excellent heat conduction. The disk 2 is made of metal such as copper or brass, and the outer peripheral surface of the disk 2 has serrated projections 3 spaced apart in the circumferential direction at a predetermined pitch P, and parallel to the axis of the central rotating shaft 1 in the width direction of the disk. Multiple extensions are provided. Directly above the disk 1, a closed container 5 that holds a molten material 4 such as molten aluminum in a molten state is supported by a suitable support (not shown), and around the outer periphery of the closed container 5 there is a heating coil, etc. A heating device 6 is attached to the upper end, and a pressure gas supply pipe 7 is connected to the upper end to supply a pressurized inert gas such as argon.An injection plate 8 is attached to the lower end, and a hole is formed in the injection plate 8. For example, a jet stream 10 as shown in FIG. A foil piece 11 is solidified and formed on the tooth back 3a of the serrated projection 3 on the outer peripheral surface, and the foil piece 11 is separated from the tooth back 3a by the centrifugal force caused by the rotation of the disk 2 and thrown into the air. The structure is such that the desired foil pieces are completely solidified while being scattered through the foil. However, in conventional devices of this type,
Since the flank surface 3b of the serration 3 coincides with the radial plane A passing through the central rotation axis of the disk 2,
In addition to machining problems with the serrations, there was also the problem of poor foil production yields. That is, when the flank surface 3b of the serration 3 is made to coincide with the radial plane A passing through the central rotational axis of the disk 2, the tooth root angle θ ₂ between the back surface 3a and the flank surface 3b is smaller than 90°. As a result,
When forming serrations, cutting with a milling cutter is not possible and a shaping process is required. Therefore, it is difficult to obtain the surface smoothness necessary to form a foil piece of uniform thickness, and the foil When manufacturing the foil pieces, air tends to be trapped in the tooth bottom 3c, resulting in foil pieces having irregular shapes and non-uniform thickness, resulting in a problem that the manufacturing yield of the foil pieces is reduced. The present invention was made by focusing on the above-mentioned problem, and the teeth of the serrations are tilted at an angle (θ ₁ ) with respect to the radial plane passing through the central rotation axis of the disk. By setting the tooth root angle (θ ₂ ) between the ventral surface and the back surface of the tooth to 90° or more,
It is an object of the present invention to provide a foil piece manufacturing apparatus that facilitates the formation of serrated projections and can improve the production yield of foil pieces. Hereinafter, the present invention will be explained with reference to the drawings. FIG. 3 shows an embodiment of the present invention, and as shown in the figure, the flank surface 3b of the serration 3 is at an angle of, for example, 5° with respect to the radial plane A passing through the central rotation axis C of the disk 2. Serrations 3 tilted at an angle θ ₁
The tooth root angle θ ₂ between the tooth back surface 3a and the tooth flank surface 3b
is set at 90° or more. FIG. 4 shows another embodiment of the present invention, in which the tooth bottom 2c of the serration 3 is formed with a curved surface whose radius of curvature is the flank height H. According to the present invention, the flank surface of the serration is inclined at an angle θ ₁ with respect to the radial plane passing through the central rotation axis of the disk, so that the root angle θ ₂ between the back surface and the flank surface is 90° or more. By having this configuration,
The milling cutter can easily form serrated protrusions with high precision and high surface smoothness, and it also prevents air from being entrained at the bottom of the teeth when manufacturing foil pieces, thereby making it possible to produce foils with the desired shape and uniform thickness. The effect is that the pieces can be manufactured with high yield. Finally, the conventional serrated projections shown in FIG. 2 and the projections according to the present invention shown in FIGS. 3 and 4,
Table 1 shows the results of a yield comparison test using disks having the same characteristics, with all other conditions being the same. The diameter of the disk used is 300 mm.
It is a copper disk with a diameter of 40 mm and a width of 40 mm. On its outer circumferential surface, serrations with a tooth flank height (H) of 0.12 mm are provided at a pitch of 1.58 mm, and an injection plate with an orifice of 0.5 mm in diameter and 15 mm in length is installed. 99.7% pure aluminum was injected at 810℃ into the attached sealed container, kept in a molten state, the disk was rotated at 2400 rpm, and the molten aluminum was sprayed onto the outer circumferential surface of the disk at 1.6 atm. , a 1.2 x 1.2 mm square foil piece was produced. The total amount of produced foil pieces is sieved using a 14-mesh sieve to separate powdery foil pieces, and the yield is expressed as a weight ratio to the total amount. θ ₁ represents the angle between the radial plane passing through the central rotational axis of the disk and the tooth flank surface of the serration. 【table】

[Brief explanation of drawings]

FIG. 1 is a schematic diagram of a foil manufacturing device, FIG. 2 is an enlarged view of a part of a conventional disk with serrations, and FIGS. 3 and 4 are views of a disk with serrations according to the present invention. This is a partially enlarged view. 1... Central rotation axis, 2... Disc, 3... Serrated process, 3a... Tooth dorsum, 3b... Tooth abdomen, 3c...
...Tooth bottom, 3d...Tooth tip, 4...Melted material, 5...
Sealed container, 8... injection plate, 9... orifice.

Claims (1)

[Scope of utility model registration request] The disks include a disk that rotates at high speed around a central rotation axis, and a device for injecting molten material onto the outer circumferential surface of the disk, the disks being spaced apart at a predetermined pitch in the circumferential direction on the outer circumferential surface and at the center. In an apparatus for directly manufacturing a foil piece from a molten material having a plurality of serrations extending in the disk width direction parallel to the axis of rotation, the serrations are The flank surface of the tooth is at an angle (θ
₁ ) An apparatus for directly manufacturing a foil piece from a molten material, characterized in that the tooth bottom angle (θ ₂ ) between the tooth back surface and tooth flank surface of the serrations is 90° or more.