KR100620594B1 - Agitational apparatus for manufacturing forming material with spherical structure - Google Patents

Abstract

The present invention is to prepare a molded article having a spherical structure in the low pressure casting method using an electronic stirrer in order to stir the spherical structure can be more finely and uniformly distributed without pores due to bubbles,

An electronic stirrer is mounted on the hot water pipe between the hot water holding furnace and the hot and cold dies to produce a molded article having a spherical structure when the molten metal is injected into the upper and lower molds of the forming part through the hot water pipe in the molten metal holding furnace of the low pressure casting machine. In the apparatus for stirring by electromagnetic field, stirring means for maximizing the collision between the metal molecules of the molten metal while suppressing the vortex phenomenon caused by the vortex generated by the electromagnetic field inside the hot water pipe equipped with the electromagnetic stirrer and; The inner side of the hot water supply pipe below the stirring means relates to a stirring device according to the manufacture of the molded article having a spherical structure, characterized in that the supporting means is provided with a support means that does not escape to the lower side.

Low pressure casting machine, electronic stirrer, spheronization, vortex phenomenon, stirring means, support means, vortex suppression means

Description

Agitation apparatus for manufacturing forming material with spherical structure

1A is a schematic sectional view of principal parts of the present invention installed in a low pressure casting machine.

Figure 1b is an enlarged cross-sectional view of the main portion of the portion in which the stirring means according to Figure 1 is installed.

Figure 2 is a perspective view schematically showing the main portion of the stirring means of the present invention.

Figure 3 is a schematic diagram of the inner portion of the Nathan in a state where the vortex is suppressed by the present invention.

Figure 4 is a perspective view of the main portion schematically showing another embodiment of the stirring means of the present invention.

5 is a sectional view illustrating main parts of another embodiment of the present invention.

FIG. 6 is a schematic enlarged cross-sectional view of the main part according to FIG. 5; FIG.

FIG. 7 is a schematic main cross-sectional view according to FIG. 6; FIG.

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Figure 8 is a main part of the state taken in the photograph the organization chart of the molded article produced by the present invention.

9 is a principal view of a state in which an electronic stirrer is installed in a conventional low pressure casting machine.

10 is a main view of a state in which the molten metal is stirred by the electromagnetic field according to FIG. 9.

FIG. 11 is an enlarged photograph of main parts of a state in which the organization chart of the molding manufactured by FIG. 9 is photographed; FIG.

Explanation of symbols for the main parts of the drawings

10: stirring means

   12: body 14: goal

20 support means

   22: support

30: vortex suppression means

   32: magnetic generator 33: O-ring

   35: upper housing 36: lower housing

   38: inlet 38a: outlet

100: low pressure casting machine

   110: molten metal holding furnace 120: molding part

   122: upper mold 124: lower mold

   130: hot water pipe 140: electronic stirrer

The present invention provides a molded article having a spherical structure that is stirred so that the spherical structure can be more finely and uniformly distributed without pores due to bubbles when the molded article is produced using an electronic stirrer in a low pressure casting method. It relates to a stirring device according to.

In general, the low pressure casting method has excellent casting recovery rate, enables the formation of clean castings, precision of dimensions, casting of various shapes, and has the advantage of minimizing economic equipment cost and initial cost.

However, since the metal structure of the molded article formed by the low pressure casting method has a fine dendrite structure that is very fragile to the resin during solidification of the metal, this has a problem that has a fatal weakness in the toughness and durability of the product. I had.

As a result, in recent years, agitation technology using electromagnetic fields has been incorporated, which can be used to obtain superfine particles close to ideal spheres and microstructures surrounding them, as well as minimizing macroscopic segregation of solute atoms, minimizing casting defects, and mechanical properties instead of dendritic tissues. The technology that can secure a number of advantages, such as securing, moldability in the subsequent process, environmental friendliness and process cost advantage is being applied.

Thus, by limiting the technology capable of producing a molded article having a spherical structure by performing electromagnetic stirring in the conventional low pressure casting method, it will be described with reference to the accompanying drawings, Figures 9 to 11 as follows.

As illustrated, the low pressure casting machine 1 includes a molten metal holding furnace 110 having a molten metal inlet (not shown) into which a molten metal is injected, and a gas inlet 112 through which a gas such as air or an inert gas is introduced, and the molten metal. The upper and lower molds 122 and 124 to be molded on the upper part of the holding furnace 120 are formed, and the hot water supply 130 is provided to supply the molten metal between the molten metal holding furnace and the upper and lower molds. It consists of.

In order to manufacture a molded article having a spherical structure in the low-pressure casting machine configured as described above, the electronic stirrer 140 for generating an electromagnetic field according to an electric application is mounted on the hot water supply pipe 130.

In the above description, reference numeral 142 denotes a preheater between the hot water supply tube and the electronic stirrer so that the molten metal in the hot water supply tube maintains a constant temperature to achieve a smooth electromagnetic field.

Accordingly, when the molten metal injected into the molten metal holding furnace is injected into the upper and lower molds as a forming part through the hot water pipe, the swirl is caused by the swirling of the molten metal in the hot water pipe by the electromagnetic field of the electromagnetic stirrer attached to the hot water pipe. The strong vortex caused by (vortex) phenomenon destroyed the dendritic growth in the conjugated coexistence area during the solidification of the metal due to the collision between the metal molecules, thereby obtaining a fine spherical metal structure when forming in the upper and lower molds.

However, when manufacturing a molded article having a spherical structure by using the electromagnetic field of the electromagnetic stirrer in the low pressure casting method as described above, as shown in FIG. 10, the vortex phenomenon due to the vortex generated by the electromagnetic field of the hot water pipe is generated by the electromagnetic field. In other words, due to the bubbles of the hollow portion formed as the molten metal is highly biased from the center to the outer portion, there is a problem that the quality of the product is reduced by the generated bubbles when forming the product in the upper and lower molds.

In other words, in the process of spherical metallization by the electromagnetic field of the electronic stirrer, the pores are not formed in the detailed spherical structure as shown in FIG. There was a problem of significantly lowering.

In addition, when the strength of the electromagnetic field is increased to increase the strength of the metal molecules of the molten metal in order to have a more spherical structure, the vortex phenomenon caused by the vortex is further intensified, which in turn lowers the quality of the product. It became.

Accordingly, the present invention has been made to solve the conventional problems as described above, the object is to suppress the vortex caused by the vortex when manufacturing a molded article having a spherical structure in the low pressure casting method using an electronic stirrer In order to maximize the collision between the metal molecules of the molten metal to provide a stirring device for stirring so that the sphericalized structure can be more finely and uniformly distributed.

Another object of the present invention is to allow the molten metal to pass smoothly without interference when the stirring means.

Still another object of the present invention is to minimize the vortex caused by the vortex generated through the electromagnetic field region.

Still another object of the present invention is to make it possible to continuously suppress the vortex phenomenon caused by the vortex.

The present invention for achieving the above object, and the molten metal holding furnace in order to produce a molding having a spherical structure when injecting the molten metal into the upper and lower molds of the forming part through the hot water pipe in the molten metal holding furnace of the low pressure casting machine; An apparatus for agitating by an electromagnetic field by installing an electronic stirrer in a hot water supply pipe between upper and lower dies, wherein the inside of the hot water supply tube equipped with the electronic stirrer suppresses the vortex caused by the vortex generated by the molten metal by the electromagnetic field. Agitation means for maximizing collision between metal molecules of the molten metal at the same time; The inner side surface of the hot water supply pipe below the stirring means is characterized in that the stirring means is provided with a support means that does not escape to the lower side.

The stirring means is characterized in that the body having a diameter corresponding to the inner diameter of the hot water supply pipe, and a plurality of bones are formed at regular intervals on the outer surface of the body.

The body is characterized in that the diameter of the upper and lower side is small and the diameter of the middle side is large.

The body is characterized in that the upper diameter is large and the lower diameter is small.

The support means is characterized in that the interior of the hot water supply pipe is composed of a support that is integrally formed to have a diameter smaller than the diameter of the stirring means.

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An electronic stirrer is mounted on the hot water pipe between the hot water holding furnace and the hot and cold dies to produce a molded article having a spherical structure when the molten metal is injected into the upper and lower molds of the forming part through the hot water pipe in the molten metal holding furnace of the low pressure casting machine. In the apparatus for stirring by electromagnetic field, stirring means for maximizing the collision between the metal molecules of the molten metal while suppressing the vortex phenomenon caused by the vortex generated by the electromagnetic field inside the hot water pipe equipped with the electromagnetic stirrer and; Support means on the inner side of the hot water supply pipe below the stirring means such that the stirring means is not separated downward; On the outer side of the hot water pipe between the electronic stirrer and the upper and lower molds, vortex suppression means for suppressing the vortex caused by the vortex generated in the molten metal passing through the region of the electromagnetic field is installed.

The stirring means is characterized in that the body having a diameter corresponding to the inner diameter of the hot water supply pipe, and a plurality of bones are formed at regular intervals on the outer surface of the body.

The body is characterized in that the diameter of the upper and lower side is small and the diameter of the middle side is large.

The support means is characterized in that the interior of the hot water supply pipe is composed of a support that is integrally formed to have a diameter smaller than the diameter of the rotating means.

The vortex suppressing means is characterized in that a plurality of magnetic force generating bodies are located at a predetermined interval on the outside of the hot water supply pipe.

The magnetic force generator is characterized in that it is embedded in the upper, lower housings having airtightness.

The upper and lower housings are characterized in that the cooling water is circulated by forming respective inlets and outlets communicating with the inside.

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

Figure 1a is a schematic cross-sectional view of the main portion of the present invention installed on a low pressure casting machine, Figure 1b is an enlarged cross-sectional view of the main portion of the portion in which the stirring means according to Figure 1 is installed, Figure 2 is a perspective view schematically showing the stirring means of the present invention to be.

As shown, spherical structure when injecting molten metal into the upper and lower molds 122 and 124 of the forming part 120 through the hot water supply pipe 130 in the molten metal holding furnace 110 of the conventional low pressure casting machine 100. In the apparatus for stirring by an electromagnetic field by mounting an electronic stirrer 140 in the hot water supply pipe 130 between the molten metal holding furnace 110 and the upper and lower molds 122, 124 to produce a molded article having

The present invention, while producing a molded article having a spherical structure by using the electromagnetic stirring to suppress the vortex caused by the vortex and to maximize the collision between the metal molecules of the molten metal so that the spherical structure can be distributed more finely and uniformly To be able to

Stirring means (10) for maximizing the collision between the metal molecules of the molten metal at the same time while suppressing the vortex caused by the vortex generated by the electromagnetic field in the inside of the hot water pipe 130 equipped with the electronic stirrer (140) ;

The inner side of the hot water supply pipe 130 of the lower side of the stirring means 10 shows that the stirring means is provided with a support means 20 does not escape to the bottom.

The stirring means 10 is a body 12 having a diameter corresponding to the inner diameter of the hot water supply pipe 130, and the molten metal in the hot water supply pipe on the outer surface of the body 12 is smoothly stirred and lower to the upper side It is preferable that a plurality of valleys 14 are formed at regular intervals so that they can pass through.

The body 12 is preferably a small diameter (w) of the upper side and the lower side and a large diameter (W) of the middle side so that the flow of the melt passing from the lower side to the upper side can be made smoothly.

The support means 20 is preferably composed of a support portion 22 is formed to protrude integrally to have a diameter smaller than the diameter of the rotating means in the hot water supply pipe 130.

The support means 20 is fixed to the inside of the hot water supply pipe 130 by inserting a conventional shape that does not cause the flow of the molten metal, such as a separately produced projection or net having a diameter smaller than the diameter of the rotating means. You may.

As described above, a strong flow is caused by the electromagnetic field of the electromagnetic stirrer mounted to the hot water supply pipe to obtain a molded product having a spherical structure before the molten metal of the molten metal holding furnace is introduced into the upper and lower molds through the hot water pipe. Occurs.

That is, the molten metal passing through the region in which the electromagnetic field is generated is generated by the electromagnetic field. That is, the electromagnetic tension is strong outside the molten metal, which is close to the electronic stirrer, whereas the central portion of the molten metal has a higher electromagnetic strength than the outside. Due to the weak tension, vortex phenomena occur due to vortices, and the vortex phenomenon is suppressed as shown in FIG. 3 by the stirring means provided in the region of the electromagnetic field.

In other words, as the molten metal is rotated in the same direction as the vortex caused by the vortex while passing through the bone of the body, which is the stirring means, the molten metal is rolled toward the center by the rotational force of the body, so that the molten metal is not biased outward as it is rotated. As it plays a role of being gathered together, it has a condition to suppress the vortex phenomenon.

In addition, as described above, the metal molecules of the molten metal collide with the body according to the agitation, and the collision between the metal molecules due to the rotation after the collision can be made more actively.

Accordingly, when the molten metal stirred by the stirring means is injected into the upper and lower molds of the molding part and then molded, the pore portion of the molding can be minimized by removing the bubbles generated by the vortex caused by the vortex. By having the conditions, the spherical tissue can be more finely and uniformly distributed.

Figure 4 is a perspective view of the main portion schematically showing another embodiment of the rotor of the present invention.

In the above configuration as shown, in order to have the above-described action as it is while having a simpler structure of the rotating body of the stirring means provided in the region of the electromagnetic field,

The body 12 shows that the upper diameter W1 is large and the lower diameter w1 is small.

Accordingly, the structure of the body has a simpler structure, making the production simpler, and the flow of the molten metal can also be made smoothly from the lower side to the upper side because the diameter of the lower side is small.

5 is a cross-sectional view illustrating main parts of another exemplary embodiment of the present invention, FIG. 6 is a schematic cross-sectional view illustrating a main enlarged view of FIG. 5, and FIG. 7 is a schematic cross-sectional view of a main part of FIG. 6.

As shown in the above configuration, between the upper and lower molds 122 and 124 of the molten metal holding furnace 110 of the low-pressure casting machine 100 and the forming unit 120 to produce a molded article having a spherical structure. Vortex generated by the vortex generated by the electronic stirrer 140 mounted on the hot water supply pipe 130 of the vortex generated after passing through the electromagnetic field and flowing into the upper and lower molds 122 and 124. In order to suppress the phenomenon, the stirring means 10 provided in the electromagnetic field region by the electronic stirrer 140 in the hot water supply pipe 130 and the vortex phenomenon caused by the vortices generated in the part outside the electromagnetic field region to further suppress the phenomenon. It shows that the vortex suppression means 30 at the same time the outer side of the hot water supply pipe 130 of the electromagnetic stirrer at the same time.

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The vortex suppression means 30 is preferably composed of a plurality of magnetic force generators 32, such as a normal permanent magnet located at a predetermined interval on the outside of the hot water supply pipe 130.

The magnetic force generator 32 is preferably coupled to the O-ring 33 in the upper and lower housings 35 and 36 having airtightness and mounted to the bottom of the frame of the low pressure casting machine by a screw or the like.

The upper and lower housings 35 and 36 form respective inlets 38 and outlets 38a communicating with the inside thereof, so that the coolant is circulated, and the magnetic force in the upper and lower housings is maintained by heat transferred through the molten metal. It is desirable to be able to prevent the magnetic force of the generator from being lost.

Rotation of the molten metal rotated by the vortex immediately before the molten metal is rotated by the vortices caused by the vortex by the electromagnetic field in the upper and lower molds of the upper side in accordance with the configuration as described above It is to suppress the speed of the molten metal rotated in the vortex phenomenon by the repulsive force which is a property to block in the opposite direction of rotation by the magnetic force generated in the magnetic generator in the upper and lower housing with respect to the speed.

Accordingly, as the rotational speed of the molten metal is reduced due to the vortex phenomenon, the molten metal is naturally inhibited from the center due to the vortex phenomenon. It will have a condition that can suppress the generation of bubbles as much as possible.

Thus, as described above, the spherical structure of the molded article having the spherical structure has a condition that can be molded into a uniform spherical structure without the pore portion due to bubbles.
Above all, the vortex phenomenon caused by the primary vortex in the rotating body, which is the stirring means in the above-mentioned electromagnetic field, is suppressed, and the collision of metal molecules is activated, as well as the upper and lower molds passing through the electromagnetic field. By suppressing the vortex phenomenon occurring in the molten metal just before injection by the vortex suppressing means secondly, a finer and more uniform spherical shape having no pores in the molded article having the spherical structure formed in the upper and lower molds of the above-mentioned forming part. It will have a condition that can be molded into a product having a textured tissue.

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Thus, it is possible to produce a molded article having the most ideal spherical structure as shown in Figure 8 by the sequential continuous action of the stirring means and the vortex suppression means when manufacturing the molded article having a spherical structure using the electromagnetic field.

As described above, the present invention, while producing a molded article having a spherical structure by using electromagnetic stirring in a low-pressure casting method, while suppressing the vortex caused by the vortex by the rotation of the stirring means provided in the electromagnetic field and the metal of the molten metal By maximizing the collision between molecules to allow the sphericalized structure to be distributed more finely and uniformly, it has the effect of maximizing the toughness and durability of the molding.

In addition, as the diameter of the lower body portion of the stirring means is smaller, the molten metal due to the stirring can also pass smoothly without interference from the stirring means.

In addition, the vortex phenomenon caused by the vortex generated through the electromagnetic field region can be suppressed to the maximum by the vortex suppressing means composed of a plurality of magnetic generating bodies, thereby forming a more precise and uniformly distributed spherical structure. It will also have the effect.

In addition, by appropriately cooling the magnetic force of the vortex suppressing means by the cooling unit, it is also effective to continuously suppress the vortex phenomenon by the vortex without replacing or delaying the vortex suppressing means.

In addition, by allowing the use of the stirring means and the vortex suppressing means at the same time, it is possible to expect the effect of producing a molded article having the most ideal spherical structure in the production of the molded article having a spherical structure.

Claims (16)

An electronic stirrer is mounted on the hot water pipe between the hot water holding furnace and the hot and cold dies to produce a molded article having a spherical structure when the molten metal is injected into the upper and lower molds of the forming part through the hot water pipe in the molten metal holding furnace of the low pressure casting machine. In the apparatus for stirring by electromagnetic field, Stirring means (10) for maximizing the collision between the metal molecules of the molten metal at the same time while suppressing the vortex caused by the vortex generated by the electromagnetic field in the inside of the hot water pipe 130 equipped with the electronic stirrer (140) ; Stirring apparatus according to the manufacture of the molded article having a spherical structure, characterized in that the inner side of the hot water supply pipe lower side of the stirring means is provided with a support means 20 that the stirring means is not separated to the bottom. According to claim 1, The stirring means 10 has a body 12 having a diameter corresponding to the inner diameter of the hot water supply pipe 130, and a plurality of bones 14 at regular intervals on the outer surface of the body Stirring device according to the production of a molded article having a spherical structure characterized in that it is formed. 3. The stirring device according to claim 2, wherein the body (12) has a small diameter (w) at the upper side and a lower side and a large diameter (W) at the middle side. 3. The stirring device according to claim 2, wherein the body (12) has a larger diameter (W1) on the upper side and a smaller diameter (w1) on the lower side. The method according to claim 1, wherein the support means 20 has a spherical structure, characterized in that composed of a support portion 22 which is integrally formed to have a diameter smaller than the diameter of the stirring means inside the hot water supply pipe. Stirring device according to the molding production. delete delete delete delete An electronic stirrer is mounted on the hot water pipe between the hot water holding furnace and the hot and cold dies to produce a molded article having a spherical structure when the molten metal is injected into the upper and lower molds of the forming part through the hot water pipe in the molten metal holding furnace of the low pressure casting machine. In the apparatus for stirring by electromagnetic field, Stirring means (10) for maximizing the collision between the metal molecules of the molten metal at the same time while suppressing the vortex caused by the vortex generated by the electromagnetic field in the inside of the hot water pipe 130 equipped with the electronic stirrer (140) ; Support means 20 on the inner side of the hot water supply pipe below the agitating means, the agitating means of which are not separated downward; The outer side of the hot water pipe between the electronic stirrer and the upper and lower molds, the spherical structure characterized in that the vortex suppression means 30 for suppressing the vortex caused by the vortex generated in the molten metal passing through the region of the electromagnetic field is mounted Stirring device according to the production of moldings having. The method of claim 10, wherein the stirring means 10 has a body 12 having a diameter corresponding to the inner diameter of the hot water supply pipe, and a plurality of bones 14 are formed at regular intervals on the outer surface of the body Stirring device according to the production of a molded article having a spherical structure characterized in that. 12. The stirring apparatus according to claim 11, wherein the body (12) has a small diameter (w) at the upper side and a lower side and a large diameter (W) at the middle side. 11. The method according to claim 10, wherein the support means 20 has a spherical structure characterized in that it is composed of a support portion 22 which is integrally formed to have a diameter smaller than the diameter of the rotating means in the hot water supply pipe. Stirring device according to the molding production. 11. The stirring device according to claim 10, wherein the vortex suppressing means (30) is a plurality of magnetic generating bodies (32) positioned at regular intervals on the outside of the hot water supply pipe. 15. The stirring device according to claim 14, wherein the magnetic force generating body (32) is embedded in and mounted in the upper and lower housings (35) (36) having airtightness. The spherical structure according to claim 15, wherein the upper and lower housings 35 and 36 have respective inlets 38 and outlets 38a communicating with the inside thereof so that the coolant is circulated. Stirring device according to the molding production.

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