JPH0629763U - Electromagnetic pump type pressure casting equipment - Google Patents

Abstract

(57) [Summary] (Modified) [Purpose] The structure should be as simple as possible to facilitate handling, improve workability, and deal with earthquake resistance and distortion due to thermal expansion. [Structure] An electromagnetic pump 3 is supported between a support plate 8 for supporting the electromagnetic pump 3 and a lid plate 6 provided on a shuttle so as to be horizontally movable with a roller 7 interposed. Heat-resistant packing is interposed between both ends of the joining pipe 11, and both ends of the joining pipe 11 are brought into pressure contact with the tap hole of the electromagnetic pump and the pouring port of the mold, respectively. Further, the spring 13 applies a compressive force to the joint pipe 11 from both sides thereof.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention is a new proposal regarding the configuration of an electromagnetic pump type pressure casting device. More specifically, a new and improved structure was obtained to improve the workability and safety of the joint pipe that guides the molten metal of the device from the kettle to the mold, and also to improve seismic resistance. An electromagnetic pump type pressure casting device is proposed.

[0002]

[Prior art]

 2. Description of the Related Art Conventionally, it is common practice to use an electromagnetic pump to draw molten metal from a kettle and inject it into a mold to produce cast products such as ingots and castings. In a casting machine using such an electromagnetic pump, the molten metal to be poured into the mold can be cast in a state in which an appropriate pouring pressure is applied as needed, so that the casting product to be produced can be uncovered. This device is effective in preventing the phenomenon referred to as. Because of the structure of the electromagnetic pump, by controlling the current on the primary side, it is possible to easily apply an electromagnetic force to the molten metal that constitutes the secondary side. Another feature is that the injection pressure can be easily controlled.

In this type of casting apparatus, a configuration that is absolutely necessary is a pipe configuration for extracting molten metal from a kettle by an electromagnetic pump and guiding the extracted molten metal to a mold. A conventional connection structure for this type of pipe is, for example, the one proposed in Japanese Utility Model Publication No. 62-8474. That is, according to the description of the same publication, it is better that this type of piping uses a ceramic tube having excellent heat resistance and corrosion resistance, and that it is better to easily connect and dismantle these.

[0004]

[Problems that the device is trying to solve]

 However, the structure of this type of device that has been proposed in various forms from the past will achieve the original purpose on the premise that only the pipes and the ends of the pipes or the joints between the pipes are firmly fixed. Is generally used, and the structure is inevitably complicated and the number of parts increases. As a result, workability was poor and handling was complicated. Moreover, it cannot be said that the structure is compliant with the seismic resistance of the pipes and the strain due to thermal expansion caused by handling the high-temperature molten metal.

The present invention overcomes the above-mentioned conventional drawbacks, not to mention the point of heat resistance and corrosion resistance, and simplifies the structure as much as possible to facilitate handling and improve workability. In addition, with the aim of proposing a pressure-type casting machine that is able to exert sufficient effects on earthquake resistance and distortion due to thermal expansion, the overall structure mainly of the joint pipe connecting the electromagnetic pump of the machine and the mold is proposed. Was reviewed and improved, resulting in a new device.

[0005]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention has a pot for storing molten metal, an electromagnetic pump for sucking the molten metal from the pot, and a molten metal sucked by the electromagnetic pump from the outlet of the electromagnetic pump for pouring a mold. In a pressure casting apparatus for an electromagnetic pump equipped with a joining pipe for guiding the electromagnetic pump, the electromagnetic pump is horizontally mounted with a roller interposed between a supporting plate supporting the electromagnetic pump and a cover plate provided on the kettle. The joint pipe is movably supported, and heat-resistant packings are provided at both ends of the joint pipe so that both ends of the joint pipe are brought into pressure contact with the tap hole of the electromagnetic pump and the pouring port of the mold, respectively. A spring was applied that applied a compressive force from both sides in the axial direction. Further, as a means for forming the above-mentioned spring, a tension spring was engaged between the flange portion provided at the end of the tap hole of the electromagnetic pump and the mold or the base on which the mold was placed. In order to achieve the same effect, a compression spring is engaged between a receiving seat standing upright on the support base of the electromagnetic pump and a working seat standing upright on the lid plate above the hook.

[0006]

[Action]

 The electromagnetic pump type pressure casting device according to the present invention is a conventional work for connecting the mold pouring port and the electromagnetic pump tap port with a pipe at the time of assembling the pre-casting assembly work mainly using the pot and the mold. Eliminates cumbersome work such as tightening with bolts and using many parts. That is, according to the present invention, after the positioning of the pot and the mold, the joining pipe is interposed between them, and thereafter, only the spring is engaged and the tightening is performed. You can Since the structure according to the present invention is configured such that the compressive force always acts on the joint pipe, even if the joint pipe is made of a material such as ceramic which is relatively weak in tensile strength and bending strength, it is compressed. Since the strength is increased by the action of force, the earthquake resistance can be improved. Furthermore, the expansion of the pipe and flange due to heat is absorbed by the change in the spring. In addition, the roller between the lid plate of the hook and the support plate of the electromagnetic pump also absorbs a large amount of thermal expansion strain, which effectively disperses deformation due to thermal strain and concentration of local stress. Can absorb.

[0007]

【Example】

 An embodiment of the electromagnetic pump type pressure casting apparatus of the present invention will be specifically described below with reference to the drawings. FIG. 1 is an embodiment showing the overall construction of an electromagnetic pump type pressure casting apparatus according to the present invention, which is shown after a part of the section is shown. In the figure, reference numeral 1 denotes a pot in which a molten metal 2 is stored. 3 is an electromagnetic pump. 4 is a mold, and 5 is a cast product manufactured by the mold. Thus, the electromagnetic pump 3 constitutes a support plate 8 via a roller 7 on a cover plate 6 provided on the shuttle 1 and is fixed to the support plate 8. The electromagnetic pump 3 fixed in this way can be moved in the horizontal direction by sliding of the roller 7. Specifically, it slides in a direction parallel to the mold 4 in the figure. The electromagnetic pump 3 has a tap hole 9 above it. A flange portion 10 is provided at the tip of the tap hole 9. Reference numeral 11 is a joining pipe. Reference numeral 12 is a pouring port provided in the mold. 13 is a spring. The above configuration will be described in more detail with reference to FIG. Reference numeral 14 is a shock absorbing mechanism such as an oil damper, etc., which has a function of mitigating the shock when an unexpected accident, for example, damage of the joint pipe 11 or a sudden force caused by an earthquake disaster acts on the entire device. It is a thing.

FIG. 2 is a cross-sectional view of a joint pipe part for describing an embodiment of the device of the present invention in detail. The joining pipe 11 is pressure-welded to the flange portion 13 provided at the tap hole 9 of the electromagnetic pump 3 with one end 11a thereof being interposed by a heat-resistant packing 15 and the other end 11b being similarly heat-resistant. It is pressed against the pouring spout 12 of the mold 4 with the packing 15 of FIG. The joining pipe 11 thus configured can receive the molten metal 2 discharged by the electromagnetic pump 3 from the flange portion 13 side and can transport the molten metal 2 to the mold 4 with a necessary pressure. The spring 13 bears the above-mentioned pressure contact force of the joint pipe 11. That is, it is necessary to withstand the pressure applied to the molten metal injected into the mold and perform the welding with a pressure contact force that does not cause leakage of the molten metal from the end of the welded pipe.

It is necessary that a plurality of springs 13 are formed around the joint pipe 11. The number is inevitably determined by the thickness and length of the joint pipe, but it is arranged so that the pressure contact force is even on the joint surface of the joint pipe, the aforementioned flange portion, and the pouring port. Although there is a concern that the spring effect will decline due to heat, since the spring 13 is located away from the part that emits heat in this configuration, the fear is not a problem. . Considering the case where an aluminum ingot is manufactured using the configuration of this device, the melting temperature of the metal is about 660 ° C. Therefore, a casting hollow tube is used as the joining tube, and asbestos is used for packing. Work can be done by using a sheet. At this time, three springs were applied around the joint pipe to tighten it.

Although the joint pipe 11 is illustrated as being in contact with each other at the end surface and the surface of the flange portion 9 on the flat surface, it is possible to adopt various structures for this contacting structure. For example, the surface of the flange portion 9 may be provided with a recess such that the end portion of the joint pipe 11 fits into the surface of the flange portion 9 so as to be opposed to each other. In this case, it is necessary to provide a recess in which the tap hole of the electromagnetic pump is processed so as to match the outer diameter of the joint pipe 11. Naturally, the packing 15 will be interposed. As another example, it is also possible to configure the packing itself with a hakama portion that fits into the flange portion and the two inner diameter portions of the joint pipe.

FIG. 3 shows another embodiment of the present invention. In this embodiment, a spring mechanism for applying a compressive force to the joint pipe 11 is interposed between the electromagnetic pump 3 and the working seat 16 and the receiving seat 17 provided in the shuttle 1. Although this construction improves workability in the portion of the joint pipe 11 as compared with the first embodiment described above, the seat of the standing structure is provided on the lid plate 6 of the hook and the support plate 8 of the electromagnetic pump. Therefore, there is a limit to the size of the casting equipment that can be applied. The reason is that the strength of the spring interposed between the seats is limited, and the pressure contact force applied to the joint pipe is limited. It is needless to say that the spring 13 'used in this embodiment is a compression panel having an action force opposite to that of the spring described in FIG.

[0012]

[Effect of device]

 As described above, the electromagnetic pump-type pressure casting device according to the present invention has a simple structure in which the connection and removal of the joint pipe required between the kettle and the mold has no bolting or the like, which improves workability. Is. Further, since the structure that absorbs the strain due to thermal expansion that is inevitably generated as a device that generates heat by the action of the spring, the safety of the entire device is improved. Furthermore, since a compressive force always acts on the joint pipe during use, even if the joint pipe is made of, for example, ceramic, it can be used with due consideration of its strength, and high seismic resistance can be obtained.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional view showing an embodiment of an electromagnetic pump type pressure casting device according to the present invention.

FIG. 2 is a cross-sectional view showing a joint pipe portion of an electromagnetic pump type pressure casting device according to the present invention.

FIG. 3 is a partial cross-sectional view showing another embodiment of the electromagnetic pump type pressure casting device according to the present invention.

[Explanation of symbols]

 1 Kettle 3 Electromagnetic Pump 4 Mold 6 Cover Plate 7 Roller 8 Support Plate 10 Flange 11 Joint Pipe 13 Spring 15 Packing 16 Working Seat 17 Seat

Claims (3)

[Reference number] 0920111-02 [Claims for utility model registration] 1. An electromagnetic system comprising: a kettle for storing the molten metal; an electromagnetic pump for sucking the molten metal from the kettle; and a joining pipe for guiding the molten metal sucked by the electromagnetic pump from the outlet of the electromagnetic pump to the pouring port of the mold. In the pump-type pressure casting apparatus, the electromagnetic pump is supported between a support plate supporting the electromagnetic pump and a lid plate provided on the kettle so as to be movable in the horizontal direction with a roller interposed between the support plate and the lid plate. A heat-resistant packing is placed at both ends of the joint pipe to press both ends of the joint pipe to the tap hole of the electromagnetic pump and the pouring port of the mold, respectively, and further compressing force from both sides of the joint pipe in its axial direction. An electromagnetic pump-type pressure casting device, characterized in that a spring that acts on is attached. 2. A flange portion provided at an end of a tap hole of an electromagnetic pump and a mold or a base on which the mold is placed, as a means for forming a spring that applies a compressive force in the axial direction of the joint pipe according to claim 1. An electromagnetic pump type pressure casting device characterized in that a tension spring is engaged with a table. 3. As a means for forming a spring that applies a compressive force in the axial direction of the joint pipe according to claim 1, a seat provided upright on a support base of an electromagnetic pump and a lid plate on a shuttle are raised. An electromagnetic pump type pressure casting apparatus, characterized in that a compression spring is engaged between the action seats provided by the above.