JPH01166874A - Casting device for composite metal product - Google Patents

Abstract

PURPOSE:To obtain a composite alloy product of excellent quality by mixing a mixture with stirring it uniformly into a liquidized base alloy and after making it in a sherbet state with its temp. control solidifying with its cooling by filling it by pressurizing into a ceramic made forming die. CONSTITUTION:The base alloy M melted in a liquid state is fed into the storing container d2 of the agitating device erected on the upper wall of a ceramic made sleeve B. In succession, a mixture N is input, a screw d3 is rotated and the mixture N is uniformly mixed by its stirring into the liquid like alloy M. The mixture is subjected to temp. controlling by a temp. control body d4, made in a sherbet state at the entrance of the sleeve B, flowed into the sleeve B and solidified by its cooling by filling it by pressurizing into a ceramic made forming die A. The product of excellent quality uniformly dispersing the mixture is thus obtd.

Description

[Detailed Description of the Invention] <Industrial Application Field> This invention is a casting method in which a composite metal product is cast by interspersing a base alloy with a mixture that does not melt with the base alloy and has a different specific gravity. Regarding equipment.

<Conventional Technical Background> Conventionally, a composite material in which mixtures of different specific gravities without being fused together are mixed into a base liquid alloy, such as a Ta-N alloy melted into a liquid state, has been produced.
Even if a Ta-N alloy composite material, which has a specific gravity smaller than that of the M alloy, is filled into a mold by stirring and interspersing a mixture of -O, TiN, etc., FIk20 or T, which has a smaller specific gravity,
When the Ta-# alloy is cooled down to the solidification range and solidified, the mixture of iN, etc. floats upward and moves, and does not melt into the mixture and is mixed with -O and Ti, which have small specific gravity.
It has been difficult to cast Ta-M alloy metal products, so-called composite metal products, in which a mixture of N and the like is uniformly mixed.

<Problem to be Solved by the Invention> The technical problem to be solved by the present invention is to uniformly disperse and mix mixtures with different specific gravities without dissolving into a base liquid alloy, and to prevent the scattering of mixtures. A casting device in which a base alloy is cooled and hardened in a sherbet-like form to the extent that there is no risk of floating or sedimentation of the mixed mixture, and the mold is filled in a series of casting cycles (each cycle operation). The object of the present invention is to enable the casting of composite metal products in which mixtures of different specific gravities are uniformly dispersed in a base alloy without melting together.

<Means for Achieving the Technical Problem> The technical means taken by the present invention to achieve the above-mentioned problem is to form a pair of male and female molds from ceramics, and to connect the molds to the horizontal A sleeve that is installed and provided in the sleeve and a piston that is fitted into the sleeve so as to be movable back and forth are made of ceramics, and an electric heating element is attached to the outside of the ceramic sleeve, and an electric heater is attached to the top wall of the sleeve. A stirring device is connected to an inlet bored in the wall and installed upright. A ceramic temperature control tube that lowers the temperature of the mixed base liquid alloy in a sherbet-like manner, and a ceramic temperature control tube that is placed in communication with the upper part of this temperature control tube to store the base alloy that has been melted into a liquid state.
A ceramic storage container for stirring and mixing the mixture added together with the base alloy into the base alloy; The device is constructed of a ceramic screw that changes the direction of rotation according to the specific gravity of the mixture, and a temperature control body attached from the outside of the storage container to the outside of the temperature control cylinder.

According to the above-mentioned technical means of the present invention, the base alloy dissolved in liquid form is supplied and stored in the storage container of the stirring device installed upright on the upper wall of the ceramic sleeve. At the same time, a mixture that does not melt with the liquid alloy and has a different specific gravity is poured into the liquid alloy, and the screw is rotated to uniformly stir and mix the mixture into the liquid alloy. The liquid alloy, in which the mixture is evenly dispersed and flowed into the temperature control cylinder, flows down from the upper region of the eye to the lower region leading to the inlet of the sleeve, and its temperature decreases in several stages. The mixture is then hardened into a sherbet-like (porridge-like) state to such an extent that the mixture to be mixed does not float or settle in the lower region up to the inlet of the sleeve. At this time, the temperature of the temperature control cylinder is controlled to drop in stages from the upper area to the lower area by a temperature control body attached to the outside, and the base alloy that is caused to flow down inside the cylinder is hardened from a liquid state to a sherbet-like state. It is something that forces you to do something.

The sherbet-like alloy is cured into a sherbet-like state in a temperature-controlled cylinder, and the mixture is kept uniformly dispersed in the sherbet-like alloy.The sherbet-like alloy is heated and maintained at a temperature that maintains its sherbet state by an electric heating element, and is caused to flow into a sleeve. It is pressurized and filled into a mold by a ceramic piston and cooled and solidified, resulting in a composite gold f11 product in which mixtures of different specific gravities are uniformly mixed without melting.

<Example> An example of the present invention will be described based on the drawings. The drawings show a horizontal mold clamping and horizontal injection casting machine, and (A) in the figure shows a male mold (
A mold consisting of a set of a mold (al) and a female mold (al), (B) is a sleeve connected and incorporated into the so-called cavity (a) in the mold (A), and (C) is the sleeve. (B)
a piston that is fitted into the cavity (a) so as to be able to move back and forth and pressurizes the sherbet-like base alloy (M) that has flowed into the sleeve (B) together with the mixture (N) in which the sherbet-like base alloy (M) is evenly dispersed; (D) is a liquid base alloy (M) in which the mixture (N>) is uniformly mixed into the liquid base alloy (M) without dissolving at all and has a different specific gravity, and the liquid base alloy (M) is mixed into a sherbet. This is a stirring device that lowers the temperature evenly.

The base alloy (M) is not particularly limited in its compounding material, but in this example, for example, Ta
-/V gold alloy 5-[Alloys such as 1 alloy and Mu alloy are used, and the mixture (N) is l'kIO, TiN and/
For example, Ta-M dissolved in liquid form using V2O3 etc.
With the alloy as a base alloy (M), in this alloy (M),
A mixture (N) of Ill;10, TiN, etc., which does not dissolve at all and has a small specific gravity, is uniformly mixed in to form Ta.
-/V Gold alloy composite metal products are cast.

Male and female molds (al) (a2) constituting the mold (A) are made of ceramics, and one of the molds (A> that connects the sleeve (B)) and the female mold (a2) that serves as a fixed mold. is fitted with a casting hole pusher (1) made of ceramic and attached to the stationary platen (2) and the movable platen 1!!!(3), respectively.

The sleeve (B) is an inner cylinder (b) made of ceramics.
+), an intermediate cylinder (bl), and an electric heating body (bz) in which heat 1 (4) is embedded.
At ffl (bz), it is installed horizontally on the fixed platen (2) and connected and communicated with the casting port push (1) of the female mold (a2), and both cylinders (bl) (bl) and the electric heating element (bz ) is provided with a presser plate (5) on the protruding end surface to integrally connect the three parts.

Then, the stirring device (D) is connected to the inlet port (6) formed in a substantially V-shape on the upper wall of the protruding side of the sleeve (B), and the stirring device (D) is placed directly on the upper wall and erected integrally. A piston (C) made of ceramic and made of a sherbet-like base alloy (M) is installed, and the mixture (N) that is supplied into the sleeve (B) by this stirring device (D) is evenly dispersed therein.
) to fill the cavity (a) under pressure.

The stirring device (D) includes a temperature control cylinder (dl) connected and erected on the inlet (6) of the sleeve (B), and a storage container (dl) placed in communication with the upper part of this temperature control n (d+). dl), a screw (d3) rotatably inserted from the storage container (dl) into the temperature control cylinder (dl), and a screw (d3) rotatably inserted from the storage container (dl) into the temperature control cylinder (dl) from the outside of the storage container (dl). It consists of a humidity control body (d4) attached to the outside.

The temperature control cylinder (dl) controls the liquid base alloy (M) in which the mixture (N) is evenly dispersed in the storage container (dl) into a sherbet-like state to the extent that the mixture (N) does not float or settle. This is a temperature control part that allows the base alloy (M) to flow into and be supplied into the sleeve (B) while lowering the temperature and preventing the movement of the mixture <N.
6) Integrally connect and stand on top.

The storage container (dl) is made of ceramic and is formed into a substantially bowl shape with an opening at the bottom, and is integrally placed on the upper opening of the temperature control cylinder (dl) to store the base alloy (M) melted in liquid form. ) is stored and a mixture (N>) is added, and this mixture (N> is stirred and mixed into the base alloy (M) by rotation of the screw (d3).

In the figure, (d5) is a ceramic lid plate provided with a screw insertion port (7) that closes the opening of the container (dl).

A temperature control body (d4) in which a temperature control mechanism (8) such as a hot wire is embedded is attached extending from the outside of the storage container (dl) to the outside of the temperature control cylinder (dl).

This temperature control body (d4) is a storage container (dl)
A heat-retaining heating section (
400) and a base alloy (M
) is comprised of a temperature control section (401) that controls the temperature to harden the liquid from a liquid state to a sherbet state.

The screw (da) is made of ceramics, is fixedly supported by a drive source (not shown), and is inserted through the screw insertion opening (7) from above the storage container (dl). a (dz) and is inserted and suspended within the temperature control cylinder (d+) so that the tip faces the inlet (6) of the sleeve (B);
The direction of rotation is changed depending on the specific gravity of the mixture (N) immersed in the storage container (dl). For example, the liquid base alloy (M) stored in the storage container (dl) is a Ta-M alloy.
-Mixtures such as -0 and TiN, which have a lower specific gravity than the M alloy (
When N) is added, the mixture (N>) is rotated in a direction to sink it into the base alloy (M).
) to ensure uniform stirring and mixing into the mixture.

In addition, in the drawing, there is a gap between the outside of the screw (da) and the inside (inner peripheral surface) of the humidity control tube (d+), but the outer diameter of the screw (da) (fin Of course, it is optional to have a structure in which the temperature control cylinder (dl) and the inner diameter of the temperature control cylinder (dl) are approximately the same diameter so that no gap is created between them.

Next, the above-mentioned male and female type (a+>(al>, sleeve (B), piston (C), one-time control cylinder (d+)
, storage container (DL), screw (DA), and ceramics used to make them include alumina,
Oxide ceramics represented by zirconia and silica, nitride ceramics represented by silicon nitride (including sialon), carbide ceramics represented by silicon carbide, etc., and zirconium ferrides, etc. This is a sintered ceramic made from chemical-based ceramics or other materials.

Next, the method for casting composite metal products using the casting apparatus of this embodiment configured as described above will be explained. Container (d
l), for example, a liquid base alloy of the Ta-N alloy system (
While supplying and storing M), a mixture (N) such as M2O and TiN is introduced, and the mixture (N) is turned into the alloy (M) by rotating a screw (da) according to the specific gravity of the mixture (N). The mixture is uniformly stirred and mixed into the temperature control cylinder (dl).

Liquid base alloy (M) in which the mixture (N) is uniformly mixed and allowed to flow into the temperature control n(d+>)
The temperature control cylinder (d+
) is cooled and hardened in the form of a sherbet (Fig. 1).

When the liquid base alloy (M) is cooled and hardened from a liquid state to a sherbet state, the rotation of the screw (da) is stopped and the piston (C) that closes the inlet port (6) is closed by its sliding a.
The injection cylinder (E) is retracted to the retraction limit and the inlet (6) is opened. When the inlet (6) is opened, the base alloy (M) is uniformly mixed with the mixture (N) and hardened at a lower temperature in the form of a sherbet. ) is caused to flow into the sleeve (B) which is heated and maintained at a temperature that maintains its sherbet state by the electric heating element b3) (Fig. 2), and the piston (C) flows through the sleeve (B). The cavity (9) is heated by heating mechanisms (9) and (10) disposed in both male and female molds (al), which are forced into a suppressed flow by advancing.
a) is injected into the container (Figure 3).

Ta-N mixed with a mixture (N) such as 10 or TiN
When the alloy base alloy (M) is filled into the cavity (a), the cooling mechanism (11) (12) provided in both the male and female molds (a+) (aZ) cools it down to the solidification range U. The base alloy (M
) is solidified, and by opening the male and female molds (a+) (al), a Ta--N alloy composite metal product containing a mixture (N) of -0, TiN, etc. is taken out. After that, repeat the same series of operations (every 1 cycle operation) to obtain Ta-A.
j This is a process in which metal-containing or Cu-Na alloy composite metal products are sequentially and continuously cast.

Therefore, the casting apparatus of this embodiment includes a step of stirring and mixing a mixture (N) with different specific gravities without dissolving into the base alloy (M) dissolved in a liquid state, and a step of stirring and mixing the mixture (N) with different specific gravity into the base alloy (M) dissolved in a liquid state. The process of cooling and hardening the liquid base alloy (M) into a sherbet-like state with no risk of floating or precipitating movement of the mixture (N>) and maintaining the mixture (N>) in a uniformly dispersed state can be carried out in a series of casting cycles. This makes it possible to cast a composite metal product in which the mixture (N) having different specific gravities is uniformly mixed into the base alloy (M) without melting at all.

In addition, in the above embodiment, the storage container (d) of the stirring device (D)
2) The liquid base alloy (M) is automatically supplied periodically from the melting furnace by connecting a hot water supply pipe to a melting furnace (not shown). A mixed material charging device is installed which operates in accordance with the supply timing of the base alloy (M), and the mixing material is automatically charged using this charging device.

In addition, the inlet (6) of the sleeve (B) was opened and closed by the piston (C), but the screw (d3) of the stirring device (D) was moved up and down to open and close the inlet (6). Of course, this is optional, and it is also possible to change the amount of base alloy (M) flowing into the sleeve (B) by adjusting the opening area of the inlet (6) by moving the screw (d3) up and down. be.

<Effects of the Invention> Since the casting apparatus of the present invention is constructed as described above, liquid is poured into the ceramic storage container of the stirring device, which is connected to the inflow port and is installed upright on the upper wall of the ceramic sleeve. By storing the base alloy dissolved in the liquid base alloy, adding a mixture that does not melt with the base alloy and having a different specific gravity, and rotating the screw, the mixture can be uniformly stirred into the liquid base alloy. At the same time, the liquid base alloy in which the mixture is evenly dispersed flows into the temperature control cylinder and flows down the cylinder from the upper area to the lower area, so that the mixture floats or settles. The sherbet-like base alloy is cooled and hardened to a safe sherbet-like state, and the sherbet-like base alloy is flowed into a sleeve that is kept humidified at a humidity that maintains the sherbet state by an electric heating element, and then placed in a ceramic mold by a ceramic piston. Can be filled under pressure. As a result, while the sherbet-like alloy filled in the mold is cooled down to the solidification range and solidified, the mixture evenly dispersed in the alloy does not float or settle.
It is possible to cast composite metal products in which the mixture is evenly dispersed.

Therefore, the intended purpose was achieved.

[Brief explanation of the drawing]

1 to 3 are longitudinal sectional front views showing an embodiment of the present invention. In addition, in the figure (A): Molding mold (a+): Male mold (a2)
:lli type (B) Nisleeve (t) 3
): Electric heating element (C): Piston (D): Stirring device (d+): Temperature control (d2): Storage container (d3): Screw (d4): Temperature control body

Claims (1)

[Claims] A pair of male and female molds are formed from ceramics,
A sleeve connected to the mold and installed horizontally and a piston fitted into the sleeve so as to be movable back and forth are made of ceramic, and an electric heating element is attached to the outside of the ceramic sleeve. A stirring device is installed upright on the upper wall and connected to an inlet formed in the upper wall. A ceramic temperature control cylinder is placed in communication with the upper part of the temperature control cylinder to store the base alloy melted in liquid form, and the temperature control cylinder is placed in communication with the upper part of the temperature control cylinder to cool down the base liquid alloy in a sherbet-like manner. , a ceramic storage container in which the mixture introduced together with the base alloy is stirred and mixed into the base alloy; A composite metal product comprising: a ceramic screw that changes the direction of rotation according to the specific gravity of the mixed mixture; and a temperature control body attached from the outside of the storage container to the outside of the temperature control cylinder. Casting equipment.