JPS59163065A - Pump for charging aluminum - Google Patents

Abstract

PURPOSE:To provide a pump for charging molten Al which is safe, inexpensive and easy to maintain by feeding a compressed gas into a ceramic pump through a gas feed port and stopping the feed of said gas to discharge the molten Al from the pump body and to charge the same into a die casting machine. CONSTITUTION:The above-described pump for charging molten Al2 is put into the molten Al to admit 1c the molten metal 2 into a U pipe 1 up to the molten metal surface 2a in a holding furnace. The compressed gas is then fed through a gas feed port 1a into the pipe 1 to discharge the metal 2 in the pipe 1 and to charge the same into a die casting machine (not shown). The feed of the compressed gas is ceased to open the port 1a when the metal 2 in the pipe 1 decreases. The metal 2 is then fed 1c through the port 1 into the pump body up to the molten metal surface 2a. The metal 2 is charged into the die casting machine by repeating the above-mentioned operation.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an aluminum pouring pump, and relates to an aluminum pouring pump used, for example, to pour molten aluminum from an aluminum holding furnace to a die casting machine.

Traditionally, a ladle was often used to pour molten aluminum from an aluminum holding furnace into a die-casting machine. However, the ladle had the following drawbacks.

Ladles were expensive due to their complicated structure, and they often broke down.

Since the ladle pumps out the molten aluminum in a ladle, it was necessary to provide a large outlet in the aluminum holding furnace. For this reason, heat dissipation from the pumping port was large.

In addition, since the molten metal pumped out by the pump was exposed to the air, there was a high probability that oxides would be mixed into the molten metal, resulting in defective products. Moreover, by being exposed to the air,
Since the temperature of the molten metal would drop, it was necessary to increase the heating humidity of the holding furnace in advance. Therefore, more holding power was required than necessary.

The ladle ladle had a short lifespan and had to be replaced every week or so. For this reason, replacement costs were high.

The ladle ladle could not be fitted with a lid, and it was extremely dangerous because it moved around a lot while containing molten aluminum. As a result, work efficiency decreased.

There was a risk of a large explosion if moisture entered the outlet of the aluminum holding furnace. For this reason, it was necessary to keep the ladle ladle dry at all times.

Also, as an alternative to the ladle, there is a pump for pouring hot water. For example, “
"Metal Pump" is a conventional pouring pump.

However, this conventional pouring pump has a complicated structure, so it cannot be said to be cheap, and the through hole for introducing the molten aluminum into the pressurized chamber is located high, which has the disadvantage of getting slag involved. . The present invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to provide an aluminum pouring pump that is safe, inexpensive, easy to maintain, and has a long life.

The aluminum pouring pump of the present invention is comprised of a ceramic pump body having a gas inlet, an aluminum molten metal discharge port, and an aluminum molten metal inlet, and a one-way valve in which a ceramic ball is provided at the aluminum molten metal inlet. , the aluminum molten metal inlet is provided at a lower position of the pump body, and the aluminum molten metal in the pump body is discharged from the aluminum molten metal outlet using the pressure of the compressed gas injected from the gas injection port, When injection of compressed gas is stopped, molten aluminum flows into the inside of the pump body from the molten aluminum inlet.

Since the aluminum pouring pump of the present invention is constructed as described above, it has a very simple structure, can be easily maintained, and can be manufactured at low cost. There is no need to worry about gas leaking into the die-cast machine.

Since the pump of the present invention does not require a large outlet in the aluminum holding furnace, there is less heat dissipation. Also, there is no risk of a large explosion due to moisture getting mixed in.

Furthermore, since the molten aluminum is not exposed to the air, there is no need to worry about the temperature of the molten aluminum decreasing. Therefore, the holding power can be reduced.

If a protective gas is used as the compressed gas, the number of defective products will be extremely reduced and the yield will be improved.

Furthermore, since the aluminum pouring pump of the present invention is made of ceramics, it has a very long lifespan.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

The aluminum pouring pump of the present invention shown in FIG.
The pump body is composed of a zero-shaped tube 1. The zero-shaped pump body is very easy to manufacture. The 0-shaped tube 1 is made of ceramics. For example, SiC is used as the ceramic. A gas inlet 1a for injecting compressed gas is provided at one end of the O-shaped tube 1. The compressed gas is air or a protective gas that is inert to the molten aluminum.

The other end of the O-shaped tube 1 is provided with an aluminum molten metal discharge port 1b for pouring the aluminum molten metal inside the U-shaped tube 1 into a die-casting machine (not shown). 0-shaped tube 1
An aluminum molten metal inlet IC for introducing the aluminum molten metal 2 into the U-shaped tube 1 is formed below. The inlet 1C is provided at a lower position of the 0-shaped tube 1. By doing this, the slag on the molten metal surface 2a is not drawn in. As shown in FIG. 2, the inlet port 1C is provided with a one-way valve having a ceramic ball. This valve prevents the molten aluminum inside the U-shaped tube 1 from flowing out.

Now, when the aluminum pouring pump of the present invention is put into the molten aluminum 2, the molten aluminum 2 flows into the U-shaped pipe 1 from the inlet 1C. Finally, the molten aluminum 2 flows up to the molten metal surface 2a of the holding furnace.

Next, when compressed gas is injected into the U-shaped tube 1 from the gas injection port 1a, the molten aluminum 2 in the U-shaped tube 1 is transferred to the discharge port 1b.
It is discharged from. In this way, molten aluminum 2 is poured into a die-casting machine (not shown). U-shaped tube 1
When the amount of molten aluminum 2 in the chamber becomes low, the injection of compressed gas is stopped, and the gas injection port 1a is opened to atmospheric pressure.

Then, the molten aluminum 2 begins to flow from the inlet 1C and reaches the molten metal surface 2a.

The above operations are repeated to pour molten aluminum into the die casting machine.

In another embodiment shown in FIG. 3, the shape of the O-shaped tube 4 is different from that shown in FIG. 1, but the positions of the gas inlet 4a, the aluminum molten metal outlet 4b, and the aluminum molten metal inlet 4C are different. do not have. In this example, a zirconia ball was used as the ball 3.

In the embodiment shown in FIG. 4, no O-shaped tube is used.

A gas inlet 5a is formed in the upper part of the pump body 5, and a molten aluminum flow port 5C is formed in the lower part of the pump body 5. A molten aluminum discharge port 5b is provided at one end of the pipe, and the other end is immersed in the molten aluminum 2.

The embodiment shown in Fig. 4 has a complicated shape and is difficult to manufacture;
This has the advantage that the pressure of the compressed gas is lower than when using a double tube.

FIG. 5 is a diagram showing an example of a device for operating the aluminum pouring pump of the present invention, in which the gas inlet 15a of the aluminum pouring pump 15 of the present invention is connected to a compressed gas control device 16 by a flexible hose 14. has been done.

The molten aluminum discharge port 15b is connected to a die-casting machine 17.

Note that the pump 15 is shown in cross section.

The compressed gas control device 16 is provided with a compressor 7 to send out compressed gas.

The compressed gas passes through a stop valve 8 and an air filter 9 to a reducer 10. The compressed gas beam is reduced in pressure by a reducer 10 to a set operating pressure. In the embodiment shown in Fig. 5, the operating pressure is 0.1 to 0.5 kg/c.
There was m2 F. 11 is a pressure gauge. Thereafter, the compressed gas is injected into the aluminum pouring pump 15 of the present invention through the speed controller 12 and the switching valve 13.

The switching valve 13 shown in FIG.
5a is open to the atmosphere. Therefore, in this state, the molten aluminum 2 is flowing from the molten aluminum flow point 15C.

According to the embodiment shown in FIG. 5, compressed gas at a constant pressure can be obtained by the reducer 10, and the amount of molten aluminum poured can be controlled by the speed controller 12, so that sudden blow-out of the molten aluminum can be prevented. This allows for stable discharge.

It is also possible to generate pressure and pressure by converting hydraulic pressure. For example, it can be obtained by connecting a booster to a hydraulic cylinder.

[Brief explanation of the drawing]

Fig. 1 is a front view showing an example of the aluminum pouring pump of the present invention, Fig. 2 is a partially enlarged view showing the vicinity of the inlet of Fig. 1, and Figs. 3 and 4 are aluminum pouring pumps of the present invention. FIG. 5 is a sectional view showing another example of a hot water pump, and is an explanatory diagram showing an example in which the aluminum pouring pump of the present invention is operated. 1...0-shaped tube, 2...molten aluminum, 3...
Ball, 4...0-shaped tube, 5...pump body, 14...
Hose, 16...Compressed gas control device, 17...Die-cast machine procedure amendment (voluntary) January 1980! + Kazuo Wakasugi, Commissioner of the Japanese Patent Office 1, Indication of the case, Patent Application No. 58-34409 2, Name of the invention, Aluminum pouring pump 3, Person making the amendment Relationship to the case Patent applicant address: Nishi-Shinjuku, Shinjuku-ku, Tokyo 1-26-2 Name: Toshiba Ceramics Co., Ltd. 4. Agent address: 2-8-1 Toranomon, Minato-ku, Tokyo. None. 6. Column 7, "Detailed explanation of the invention" in the specification subject to the amendment. Correct "Holding power" in lines 10 to 11 on page 5 to "Holding power (for electric heating method) and gas (for gas heating method) consumption".

Claims (1)

[Claims] It is composed of a ceramic pump body having a gas inlet, an aluminum molten metal discharge port, and an aluminum molten metal inlet, and a one-way valve having a ceramic ball in the aluminum molten metal inlet, and the aluminum molten metal inlet is connected to the pump body. The molten aluminum in the pump body is discharged from the molten aluminum outlet using the pressure of the compressed gas injected from the gas inlet, and when the injection of compressed gas is stopped, the molten aluminum inlet A pump for pouring aluminum, characterized in that the molten aluminum flows into the inside of the pump body.