JPH01313134A - Apparatus for manufacturing semi-solidified metal - Google Patents

Abstract

PURPOSE:To simplify the construction and to make the apparatus compact by arranging a valve for discharging hole arranged in a vessel in the apparatus for forming into semi-solidified metal slurry by rotating stirrer to give molten metal in the vessel stirred shearing force. CONSTITUTION:By extending a rod 36 in a hydraulic cylinder 35, the discharging hole 13 is made to closed condition through the valve 32 and successively, the stirrer 3 is rotated and by conducting electricity to an iron piece 18, induction current is generated and heat medium is circulated into a heat medium supplying pipe 10. Each refractory 7, 8 is shaft part 16 of a temp. adjusting shaft 2 and the vessel 1 is heated to the prescribed temp. respectively. Molten metal M is supplied into the vessel 1 from supplying tube 15, and while controlling the temp. by putting on/off the heat medium, cooling medium and induction current, the molten metal M is formed into the slurry existing under mixing fine spherical crystal line grains by rotating the stirrer 3. Successively, by extending the rod 36 in the cylinder 35, the valve 32 is descended and gap 21 between the lower end edge of a cover 17 in the temp. adjusting shaft 2 and the upper edge of the discharging hole 13 is opened to discharge the slurry. By this method, the construction for discharging the slurry can be simplified.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a semi-solid metal slurry manufacturing apparatus.

[Prior art] To obtain a semi-solid metal slurry (hereinafter simply referred to as slurry) in which as many fine spherical crystal grains as possible are present in the molten metal in a solid-liquid coexistence temperature range in a metal alloy containing two or more metal elements. There is a method in which stirring shear force is applied to the molten metal while controlling the temperature from the solidification start point to crush the growing dendrite crystal structure and uniformly mix fine spherical crystal grains in the molten metal.

The apparatus for carrying out this method is such that the molten metal supplied into the container can be rotated and moved up and down while controlling the temperature of the molten metal supplied into the container using a cooling device and a heating device provided on the outer periphery of the container. By rotating the disposed slurry, the molten metal is stirred to form a slurry, and the formed slurry is made to rise.
It is known that the slurry is taken out from the outlet at the bottom of the container, which was closed by the slurry.

[Problems to be Solved by the Invention] However, in such an apparatus, the mechanism for rotating and moving the slurry up and down becomes complicated, which leads to an increase in the size of the apparatus.

[Means for Solving the Problems] The present invention has been made to solve the above problems, and by rotating a slurry rotatably disposed in a container, stirring and shearing is applied to the molten metal in the container. In a semi-solid metal slurry manufacturing apparatus that applies force to form the molten metal into a semi-solid metal slurry and discharges the slurry from an outlet provided in a container, the outlet includes a valve that opens and closes the outlet. It is characterized by having the following.

[Function] According to the semi-solid metal slurry manufacturing apparatus of the present invention, the discharge of the slurry is controlled by opening and closing the valve provided at the discharge port,
Further, by adjusting the opening degree of this valve, the amount of slurry discharged can be appropriately controlled.

[Example] Hereinafter, an example of the present invention will be described with reference to FIGS. 1 and 2.

In the figure, Δ is a slurry manufacturing apparatus according to the present invention, and this apparatus A includes a bottomed cylindrical container 1 into which molten metal M is supplied, a temperature adjustment shaft 2 disposed inside this container 1, and It generally consists of a slurry 3 and a slurry drive mechanism 5 housed in an upper casing 4 on the container 1.

The container 1 has a hollow cylindrical shape with inner and outer refractory materials 7.8 provided on the inner circumferential wall of the iron shell 6,
Its upper end is fixed to the upper casing 4.

Below the space 9 formed between the inner and outer refractory materials 7.8 are a heat medium supply pipe IO for circulating a heat medium for heating the molten metal, and a heat medium supply pipe IO for circulating a cooling medium for cooling the molten metal. A cooling medium supply pipe 11 is disposed therein.

Further, as shown in FIG. 2, /1Vi112 along the axial direction is formed on the inner surface of the inner refractory material 7, and as a result, unevenness is formed on the inner circumferential surface of the container 1 along the circumferential direction. has been done.

Further, a circular slurry discharge port 13 is bored in the center of the iron shell 6 forming the bottom of the container 1, and a ring-shaped projection 14 is formed around the discharge port 13 to project downward. Further, the container 1 has a molten metal M flowing into the container 1 from the outside.
A supply pipe 15 is provided integrally with the container 1.

Inside the container 1, the cylindrical temperature adjustment shaft 2 is inserted into the container 1.
It is arranged coaxially with. The temperature adjustment shaft 2 has a cylindrical shaft portion 16 covered with a cylindrical cover 17 with a bottom.
Further, within the shaft portion I66 covered by this cover 17, a spiral iron piece 18 is provided as a heating means to generate an induced current.
is embedded. The cover 17 is made of ceramics, and is fixed to the shaft Y6 with bolts 19, and a groove 20 along the axial direction is formed on the outer circumferential surface of the cover 17, so that the outer circumferential surface of the cover 17 unevenness is formed along the circumferential direction.

Further, the outer diameter of the cover 17 is the same as that of the discharge port 1.
3, and its lower end surface is at the same level as the bottom surface of the container 1. Therefore, there is a ring-shaped gap 2 between the lower end edge of the cover 17 and the upper end edge of the discharge port 13. ■ is there.

The shaft portion 16 of the temperature adjustment shaft 3 is fixed to the lower part of a cylindrical support rod 22, and the upper end of the support wand 22 is fixed to the upper casing 4.

The cylindrical slurry 3 is disposed within the container 1 and around the temperature adjustment shaft 2. This slurry 3 consists of a ceramic cylindrical base 23 and a plurality of ceramic cylindrical rods 24 fixed to the lower end surface of the base 23 and extending downward along the axial direction of the base 23. As shown in FIG.
A slit 25 is formed in between. This slurry 3 is fixed to the lower part of a support tube 26, and this support tube 26 is rotatably arranged around the axis of the support rod 22 via a bearing 27, and a gear 28 is attached to the upper end of the support tube 26. are coaxially and integrally fixed.

The slurry drive mechanism 5 includes a shaft 30 that passes through the upper casing 3 via two bearings, and a drive gear 31 that meshes with a gear 28 fixed to the upper end of the support tube 26 at the tip of the shaft 30. Said shirt) 30
A shaft 30, both gears 28.
31, the slurry 3 is rotated via the support tube 26.

Then, at the discharge port 13 formed below the container 1,
A valve 32 is provided to open and close the discharge port 13, which is the key point of the present invention.

This valve 32 has a U-shaped cross section, has an opening 33 in the center, and has an upper outer circumferential surface in contact with the inner surface of the discharge port 13, and is slidable in the axial direction within the discharge port 13. has been done.

This valve 32 is supported by an opening/closing mechanism 34 provided at the bottom of the container l, and is configured to be opened and closed. This opening/closing mechanism 34 includes a fluid pressure cylinder 35 fixed to the bottom surface of the container 1, a telescopic rod 36 of the fluid pressure cylinder 35, a bracket 37 fixed to the lower end of the protrusion 14 around the discharge port 13, and a bracket 38 at the bottom of the valve 32. The links 42 are connected by pins 39, 40, and 41, respectively, and as the rod 36 of the hydraulic cylinder 35 expands and contracts, the links 42 rotate about the pin 40 as shown by the arrow (A). , the valve 32 moves up and down within the discharge port 13.

When the valve 32 moves upward and comes into contact with the lower end surface of the slurry 3, the ring-shaped gap 21 formed between the slurry 3 and the discharge port 13 is closed, and the discharge port 13 is closed.

Note that a sealing material 43 that maintains the airtightness of the valve 32 is attached to the inner circumferential surface of the discharge port 13.

Further, numeral 44 in the figure is a gas exhaust pipe provided in the upper casing 4.

Next, the operation of the slurry manufacturing apparatus A having the above configuration will be explained.

First, extend the rod 36 of the fluid pressure cylinder 35 so that the valve 3
2 to close the discharge port 13, then the slurry 3 is rotated, the iron piece 18 is energized to generate an induced current, and the heat medium is circulated through the heat medium supply pipe 10. As a result, the shaft portion 16 of the temperature adjustment shaft 2 is caused by an induced current.
Further, each of the refractory materials 7.8 having a capacity of 1 ton is heated to a predetermined temperature by the heating medium.

When the temperature adjustment shaft 2 and each refractory material 7.8 are heated to a predetermined temperature in this way, the molten metal M is supplied from the supply pipe 15 into the container l, and if necessary, the heat medium is supplied to the heat medium supply pipe 10. Also, supplying a cooling medium to the cooling medium supply pipe 11,
Furthermore, while controlling the temperature of the molten metal M by continuing or stopping the heating by the induced current of the temperature adjustment shaft 2, a stirring shear force is applied to the molten metal M by rotating the slurry 3, and the dendrite crystal structure grows. The molten metal M is formed into a slurry by crushing the molten metal M to mix uniform fine spherical crystal grains in the molten metal M.

When a predetermined slurry is formed, the rod 36 of the cylinder 35 is extended and the valve 32 is lowered by a distance X to open the gap 21 between the lower edge of the cover 17 of the temperature adjustment shaft 2 and the upper edge of the discharge port 13 (open the outlet 13). As a result, the slurry in the container 1 passes through the valve 32 from the gap 21, drops downward from the opening 33 of the valve 32, and is discharged.

When the slurry has been discharged, the rod 36 of the cylinder 35 is extended to close the valve 32, and the molten metal M is again supplied from the supply pipe 15 into the container l to form a slurry as described above. Once formed, valve 32 is opened to drain the slurry.

By controlling the opening degree of the valve 32, the slurry discharge amount can be easily adjusted.

In this way, in this apparatus A, the discharge of slurry can be controlled by the valve 32 provided at the discharge port 13 of the container 1. The valve 32 is provided at the discharge port 13, and the structure of the opening/closing mechanism 34 of the valve 32 is simple. Since there is no need to equip the device with any mechanism, the structure of the device as a whole is simplified, thereby making the device more compact.

FIG. 3 shows a modified example of the slurry, in which a slurry piece 51 having an arcuate cross section extending downward in the axial direction from the lower end surface of the base 23 is attached to the base 23.
3, the slurry pieces 51 are arranged at a plurality of locations (four locations in this case) on the lower end surface of the base 23, and slits 52 are formed between each slurry piece 51.

[Effects of the Invention] As explained above, according to the semi-solid metal slurry production apparatus of the present invention, by rotating the slurry rotatably disposed in the container, stirring shear force can be applied to the molten metal in the container. In the semi-solid metal slurry manufacturing apparatus, the molten metal is formed into a semi-solid metal slurry by applying the molten metal, and the slurry is discharged from a discharge port provided in the container, the discharge port having a valve for opening and closing the discharge port. Because of this feature, the structure for discharging the slurry is not complicated, the structure of the entire device is simplified, and the device can be made more compact.

[Brief explanation of the drawing]

FIG. 1 is a side sectional view showing one embodiment of the present invention, FIG. 2 is a sectional view taken along line 1--2 in FIG. 1, and FIG. 3 is a sectional view showing a modification of the slurry. 1...Run RN, 3...Slurry, 13...Discharge port, 32...
... Valve, M ... Molten alloy. Applicant Ishikawajima Harima Heavy Industries Co., Ltd.

Claims (1)

[Claims] By rotating a stirrer rotatably disposed in the container, a stirring shear force is applied to the molten metal in the container to form the molten metal into a semi-solid metal slurry, and the slurry is converted into a semi-solid metal slurry. 1. A semi-solid metal slurry manufacturing apparatus that discharges from a discharge port, characterized in that the discharge port is provided with a valve that opens and closes the discharge port.