JPH0649418Y2 - Molten metal pumping equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a molten metal pumping apparatus, and more particularly, to a molten metal processing hot water distribution apparatus attached to a die casting machine for aluminum or zinc or alloys thereof, Especially in connection with the structure of the ladle (hereinafter referred to as "ladle"), a new molten metal pumping that meets the demand that it should be held under a preferably non-porous structure because it is made of ceramics. It proposes the structure of the shining device.

[Conventional technology]

The above-mentioned hot water distribution apparatus hot-charges the degassed and deoxidized molten aluminum, zinc, or their alloys melted in the melting furnace into the heat-retaining furnaces attached to the die casting machines, and then further melts the alloys in each die casting. This is used when the molten metal in the heat-retaining furnace is pumped out by the ladle attached to the swing shaft of the hot water distribution robot and is poured into the die casting sleeve when the hot water is distributed to the machine.

In this hot water distribution device, in particular of the automatically operated type, the ladle used for hot water distribution is suspended and held via a bracket fixed to the end of the swing shaft.

Moreover, since this ladle targets high-temperature molten metal (which will be described below in the example of "Al molten metal"), it must be made of a heat-resistant and robust material, such as cast iron. Of course, in consideration of safety, the bracket is also made of cast steel, and as shown in FIG. 4, both brackets are connected by bolts or welded.

In FIG. 4, reference numeral 41 in the drawing denotes a cast iron basket-shaped container body, which has a structure in which a discharge portion 41a for mounting a bracket 42 is projectingly provided at an appropriate position on the upper side.
l It is usually used to apply refractory powder on the inner and outer surfaces in order to improve the corrosion resistance and heat resistance of the molten metal and to improve the corrosion resistance and heat resistance of the molten metal. Also, this bracket 42
Is composed of a grip portion 42a mainly attached to the container discharge portion 41a by a steel member and a connecting portion 42b for attaching to a swing shaft, and the container body 41 is fastened with a bolt 43 of the grip portion 42a. Furthermore, the holding metal fittings 44 are connected by screws.

[Problems to be solved by the device]

The conventional pumping device described above uses a refractory to improve durability because the ladle is made of cast iron, but its service life is short and extra work is required to apply refractory powder. However, there is a disadvantage that the efficiency is increased due to the increase in the amount of impurities and that the inclusion of impurities due to the melting damage of the base is unavoidable. Furthermore, this cast iron has a high thermal conductivity, so it is easy to radiate heat,
Since the temperature of the molten metal drops remarkably, the temperature of the molten metal must be raised by that amount in advance, and there is a drawback that the energy cost increases.

On the other hand, as a solution to the above-mentioned drawbacks of cast iron ladles, those using ceramics such as silicon nitride, sialon, or aluminum titanate have been developed. A fatal defect due to ceramics remains that stress concentration is likely to occur in the bolt insertion mounting hole 45 provided, and that this ladle is easily broken around the hole of the so-called container discharge part 41a.

An object of the present invention is to propose a ladle structure capable of solving the above-mentioned defects caused by being made of cast iron and the above-mentioned defects of ladle caused by being made of ceramics.

[Means for Solving the Problems]

As described above, regarding the pumping device including the conventional ceramics ladle and the bracket used for the same, which have been developed to overcome the above-mentioned drawbacks, durability, work efficiency, contamination of impurities and high cost that the cast iron ladle has, In view of the fact that the drawback is mainly due to the fact that the mounting holes for inserting bolts are opened, the present invention is provided with a bracket and a ladle that can be connected to the bracket without opening such mounting holes. This is to propose a pumping device.

That is, the present invention is a pumping device including a container for storing molten metal made of ceramics and a bracket for suspending and holding the container, and a cylindrical discharge part is provided at an upper part of one side of the container. A pumping section is provided by a notched upper edge on the opposite side of this discharging section while projecting, while the bracket is
It is composed of a channel-shaped crowned portion that is fitted on the outside of the discharge portion, and a fixing bracket having a U-shaped cross section that is used by bolting the free end with the crowned portion and the upper surface of the container discharge portion sandwiched. The present invention also relates to a molten metal pumping device having the above-mentioned configuration, and further having a slit on the upper surface of the discharge part.

The container, that is, the ladle, is made of ceramics, which is composed of a main body portion 1a and a discharge portion 1b formed in a tubular shape. The main body part 1a is a part for pumping out the molten metal and for injecting (discharging) it as necessary, and for that reason, the upper edge part which is just opposite to the cylindrical discharge part 1b is formed with a notch. By doing so, the pumping-out portion 1c for facilitating the molten metal treatment is formed.

On the other hand, the discharge part 1b is a part that mainly serves as a passage for discharging the molten metal scooped from the pumping part 1c, and at the same time, is attached with a bracket 2 described later so as to be connected to the swing shaft of the hot water distribution robot. It is also a part for holding necessary.

The discharge part 1b has the following structure in order to provide a molten metal discharge path and a bracket support structure. For example, an elliptical shape having a flat vertical cross section at the top surface is cylindrically projected from one upper edge of the container 1. Regarding the size of the cylindrical cross section and the size of the protruding width, a size sufficient to safely hold the molten metal container 1 is adopted according to the size of the molten metal container 1. Further, the tubular shape may be a conical tubular shape as well as a straight tubular shape.

Further, regarding the discharging portion 1b, on the upper surface of the tubular body,
You may provide a slit of a required interval along the cylinder axis direction,
The formation of these slits prevents the strain that is expected during the production of the container (slip casting of ceramics), and when the molten metal is discharged, for example, the bottom wall of the passage where the temperature rises in contact with this molten metal and the molten metal This is effective in making a container that is less likely to be damaged by the difference in thermal expansion of the upper portions of the passages that are not in contact.

Next, the bracket 2 attached to the container discharge part 1b is
It has a crowned portion 2a having a channel-shaped cross section as a main part for covering the outer upper portion of the discharge portion 1b from above and being crowned, and the connecting portion 2b is provided on one side surface of this crowned portion 2a. It is made by fixing. In addition to the crowned portion 2a, a fixing metal fitting 3 having a U-shaped cross section is combined and used for the bracket 2. The fixing metal fitting 3 has a tightening bolt 4 which is used by inserting the fixing metal fitting 3 in the vertical direction at the facing free ends thereof. Then, the fixing metal fitting 3 sandwiches the upper surface of the container discharge portion 1b and the upper surface of the bracket crowned portion 2a in a U-shaped groove of the metal fitting, and fastens the fastening bolt 4 at the free end to clamp the free end of the metal fitting 7. It is used by pressing. By these, container 1
And the bracket 2 are firmly connected.

In addition, reference numeral 2b in the drawing denotes a connecting portion of the bracket,
Drive device for container (hot water distribution robot) via its discharge part 1b
The projection is provided on the grip portion 2a so as to be attached to the swing shaft.

〔Example〕

FIGS. 1 to 3 show an embodiment of the present invention pumping apparatus. First, a container 1 shown in FIGS. 1 (a), (b) and (c) is a slip-molded silicon nitride ceramics. Which has a bowl-shaped body 1a composed of
A straight cylindrical discharge portion 1b is provided so as to project from the upper edge of 1a. Further, in this container, an upper edge portion on the opposite side of the discharge portion 1b is obliquely cut out to form a pumping portion 1c.

2 (a) and 2 (b) show an example of the container discharge part having a conical cylindrical discharge part 1'b whose both sides have a tapered shape. An example of a combination in which the bracket 2 according to the present invention is attached is shown.

The bracket 2 fitted and used in the discharging portion 1b is composed of a crowned portion 2a and a connecting portion 2b as shown in the drawing, and the crowned portion 2a is straddled from above the container discharging portion 1b and sandwiched. So that they fit together. Then, the fixing bracket 3 having a U-shaped cross section,
The container body 1a is inserted from the side toward the free end side, and the discharge portion 1b and the crowned portion 2a are integrally fixed. That is, the fixing metal fitting 3 is inserted from the rear end of the container discharge portion 1b (close to the center of the container) so as to sandwich the upper edge of the discharge portion 1b and the bracket crowned portion 2a, and It is used for projecting a part from the tip and for mounting and tightening a tightening bolt 4 that penetrates the upper and lower pieces of this projected part, so as to firmly connect the so-called container body and the bracket together.

Further, FIG. 3 shows a different type of container body, and is an example of a ladle in which the slit 5 is provided along the axial direction of the center of the upper surface of the straight tubular discharge portion 1b. On the other hand, the above-mentioned bracket 2 is combined to form the pumping device of the present invention.

[Effect of device]

As described above, according to the pumping apparatus of the present invention, if attention is first focused on the container, ceramics can be used, so that it has excellent durability, good work efficiency, and there is no risk of impurities being mixed. Since energy can be suppressed, low cost can be realized. Moreover, since it is not necessary to form a hole in the main body as in the conventional case, there is no fear of destruction due to stress concentration. On the other hand, focusing on the bracket, the number of bolts and screws used can be reduced, and the structure is simple, so it is easy to handle and has many advantages in terms of cost. Can be said to be a thing.

[Brief description of drawings]

FIG. 1 shows an embodiment of the container of the pumping device of the present invention,
The figure (a) is a plan view, the figure (b) is a longitudinal sectional view, the figure (c) is a side view showing the discharge part in section, and FIG. 2 is a drawing of the pumping device of the present invention. , Fig. (A)
Is a partially cutaway plan view, FIG. 2B is a partially cutaway front view, FIG. 3 is a plan view of a container having a slit, and FIG. 4 is a partially cutaway view of a conventional pumping device. It is an exploded perspective view shown. 1 ... container, 1a ... main body, 1b ... discharging part, 1c ... pumping part, 2 ... bracket, 2a ... crowned part, 2b ... connecting part, 3 ... fixing bracket, 4 ... Tightening bolt, 5 …… Slit.

Claims (2)

[Scope of utility model registration request] 1. A pumping device comprising a container for storing molten metal, which is made of ceramics, and a bracket for suspending and holding the container, wherein a cylindrical discharge portion is projected on one side of the container. And a pumping portion having a notched upper edge on the opposite side of the discharge portion is provided, while the bracket includes a channel-shaped crown portion fitted on the outside of the discharge portion and the crown portion. A molten metal pumping device comprising a fixing member having a U-shaped cross section, which is used by bolting the free end with the portion and the upper surface of the container discharging portion sandwiched therebetween. 2. The molten metal pumping apparatus according to claim 1, wherein a slit extending in the cylinder axis direction is provided on the upper surface of the container discharge portion.