WO2010147266A1 - Vacuum die casting method for light metal and apparatus thereof - Google Patents

Abstract

The present invention relates to a vacuum die casting method for light metal and an apparatus thereof to be mounted in direct connection with a mold of metal die casting machines such as a die casting machine, a vertical forging machine, a die casting machine of gravity, a vertical squeeze casting machine, or a vacuum melting die casting machine. More particularly, metal molten in a vacuum is kept warm and stored in a first melt induction pipe or a second melt induction pipe, a molding section of a mold is sealed in vacuum so that the melt may be discharged from the second melt induction pipe mounted with a melt valve, a third melt induction pipe is directly connected to the mold without contacting a platen, and the distance between a tap hole and the mold is minimized so as to prevent solidification of the melt during the flow of the melt. In addition, an additional base block is mounted so that the opening/closing plunger of a melt injection hole will not be pushed by injection pressure.

Description

Method and apparatus for molding light metal in vacuum environment

The present invention relates to a method and apparatus for molding a light metal in a vacuum environment, and a die casting machine (DIE CASTING MACHINE), a vertical melt forging machine (VERTICAL FORGING MACHINE), a gravity mold casting machine (DIE CASTING MACHINE) OF GRAVITY, VERTICAL SQUEEZE CASTING MACHINE, and VACUUM MELTING DIE CASTING MACHINE.

Specifically, the molten molten metal in a vacuum environment is kept in the first molten metal induction pipe and the second molten metal oil induction pipe in which the vacuum environment is maintained, and the molded part of the mold is sealed and the vacuum valve is installed. It is possible to tap the second molten metal induction pipe and connect the third molten metal induction pipe directly to the mold without contacting the platen and to shorten the distance between the hot water outlet and the mold as much as possible to prevent solidification during the flow of the molten metal. . In addition, the present invention relates to a method and apparatus for molding a light metal in a vacuum environment, characterized in that a separate support block is installed below the molten metal induction pipe support to fix the molten metal inlet opening and closing plunger so as not to be pushed to the injection pressure.

In general, a light metal is a metal having a lighter specific gravity than titanium (specific gravity 4.5), and typically beryllium (specific gravity 1.85), magnesium (1.74), aluminum (2.7), titanium (4.5), and the like. Mold casting molding methods of die casting, gravity mold casting, squeeze casting, molten metal forging are generally used among the mold casting molding methods of light metals, and magnesium alloys are widely used as raw materials in such mold casting machines.

In particular, magnesium contains about 2.7% of the earth and is the eighth most abundant. Magnesium alloy has a specific gravity of 1.79 ~ 1.81 and is light and has a weight reduction effect of about 70% compared to steel, and has excellent specific strength, non-rigidity, castability, machinability, electromagnetic shielding ability, vibration and shock absorption ability, and is applicable to a wide range of fields. The usage is increasing rapidly.

Conventional die casting molding methods using light metal alloys include a die casting method, which is divided into a hot chamber method and a cold chamber method. As a patent document, an injection molding method and apparatus for a metal alloy (Korea Patent No. 10- 0149166, International Publication No. WO 90/09251), roughly classified by Thixomolding method.

Among the die casting methods, the cold chamber method is to separate the mold casting molding machine and the light metal melting furnace separately, and the molten molten metal is poured into the injection sleeve of the mold casting molding machine, and the molten metal is pressed by the injection plunger and injected into the mold. The hot chamber method is the injection cylinder. Is molded by pressing in the melting furnace to inject high temperature molten metal into the mold, and the thixomolding method combines conventional plastic injection and die casting of metal, and uses chip-type magnesium alloy as a raw material like plastic injection. do.

However, there are problems in the die casting molding method, in particular, the melting of the magnesium alloy and the method of transferring the material.

In the case of using magnesium alloy in the die casting method, it is necessary to prevent the oxidation of the molten metal because it melts when melted in the air. Therefore, when melting magnesium alloy, a large amount of flame retardant flux (SF6 + CO2 mixed gas) or inert gas is injected into the melting furnace. Flux is a greenhouse gas, which adversely affects the atmospheric environment, and is increasingly regulated. In addition, since the price continues to rise, the melting of magnesium alloy by the die casting method has a relatively high production cost in terms of production cost and causes air pollution.

The thixomolding method stores magnesium alloy chips in a hopper, feeds chips into a cylinder, moves them forward by the rotation of the screws, simultaneously heats them, turns them into a slurry with a predetermined solid phase rate, and then turns the metal slurry into a high speed screw. It is a method of filling in the molding part of a metal mold by forward movement. However, as described above, the raw material in the form of a chip is considerably expensive, and scraps (molded goods, runners, gates) which are inevitably generated in metal forming are also impossible to reuse, thereby increasing the raw material value.

The present invention, in order to improve the problems of the prior art by producing a large amount of inert gas or flame retardant flux (CO2, SF6) for the melting and casting of light metals such as magnesium alloy with high activity, a series of processes of mold casting molding Instead of using greenhouse gases (CO2, SF6) in the introduction of phosphorus metal materials, melting, warming storage, tapping and molding of metal materials, the space is made into a vacuum environment so that high-quality light metal products can be safely and eco-friendly. The purpose is to produce at low cost.

In order to achieve the above object, a device for molding a light metal in a vacuum environment according to the present invention includes a vacuum fusion chamber 20 which is a vacuum environment; A metal melting furnace 23 through which one side of the vacuum melting chamber 20 penetrates and is installed in a tubular shape; The first molten metal induction pipe 30 and the first molten metal formed by bending the molten metal 2 melted in the metal melting furnace 23 into a shape inclined downward in the mold 100 direction to insulate and store the insulating material. It is in communication with one end of the induction pipe 30 and in communication with the second molten metal induction pipe 40 of the tubular shape having a constant inclination, and the lower end of the second molten metal induction pipe 40, inclined to about 5 degrees The molten metal inlet 53 which extends in a state and does not contact the platen is directly connected to the mold 100, and a second flange 51 is provided at the opposite end thereof, and the molten induction pipe support 80 coupled to the platen 200 is provided. A third molten metal induction pipe 50 coupled to the bolt; Opening means for controlling the tapping in the second molten metal induction pipe 40, and when closed, the vacuum environment inside the second molten metal induction pipe 40, the first molten metal induction pipe 30, the vacuum melting chamber 20 is maintained Molten valve 45 to be made; A molten metal inlet opening / closing cylinder (52) provided on an outer surface of the cylinder support (60) coupled to the mold 100 of the third molten metal induction pipe (50); A molten metal inlet opening / closing plunger 55 interlocked with the molten metal inlet opening / closing cylinder 52 and reciprocating in the third molten metal induction pipe 50; And heating means (70) for wrapping and heating the outer circumferential surface of the first melt induction pipe (30), the second melt induction pipe (40), and the third melt induction pipe (50). As a result, the metal material 1 introduced into the vacuum melting chamber 20, which is a vacuum environment, is changed into the molten metal 2, and the first molten metal induction pipe 30 at the lower end and the second molten metal induction pipe 40 communicated thereto. ), The molten metal 2 is stored and kept warm, and the molten metal 2 is sealed and heated in the third molten metal induction pipe 50 connected in a state in which the molded part of the mold 100 is sealed and made in a vacuum environment.

In addition, according to the device for molding a light metal of the present invention in a vacuum environment, the molten metal valve 45 of the second molten metal induction pipe 40 is formed on the upper surface of the second molten metal induction pipe 40 for interlocking shafts. A molten metal valve cylinder 41 and a ball-shaped molten metal valve cock 46 provided at the shaft end of the molten metal valve cylinder 41; and a tap opening formed at an inner end of the second molten metal induction pipe 40. The molten valve cock 46 is interviewed on the tapered inner circumferential surface of 48 to adjust the amount of tapping out of the molten metal 2.

The first molten metal induction pipe 30, the second molten metal oil inducing pipe 40 and the third molten metal oil inducing pipe 50 are integrally manufactured in the form of a pipe, but as shown in FIG. It may be divided into four quarters, and may be integrally fastened by welding the "V" type joints to the wedge-shaped grooves at both ends of the induction pipe, or bolted to each other with a flange at both ends of the induction pipe.

In addition, according to the device for molding a light metal of the present invention in a vacuum environment, the vacuum fusion chamber 20 coupled to the first molten metal induction pipe 30 is coupled through a flange, the molten metal in the shape of a normal light in the bottom The funnel 21 is connected to the upper end of the first molten metal induction pipe 30, and is provided with a heating means 22 for wrapping the outside of the molten funnel 21 and electrically heating the upper portion of the molten funnel 21, When the molten metal height sensor 400 is attached and the molten metal sensor 2 detects that the molten metal 2 is insufficient, the metallic material 1 is configured to be supplied to the metal melting furnace 23.

In addition, according to the apparatus for molding the light metal of the present invention in a vacuum environment, the tapping of the molten metal 2 in the second molten metal induction pipe 40 into the third molten metal induction pipe 50 to the mold 100 ends. At the same time, the molten metal inlet opening and closing plunger 55 in the third molten metal induction pipe 50 is advanced in the mold direction to close the molten metal inlet 53 and stop. At this time, there may be a device for fixing the molten metal injection inlet closing plunger 55 does not push backward, the device,

A molten metal inlet opening / closing cylinder 52 coupled to the cylinder support 60 and having a molten metal inlet opening / closing plug 55 that reciprocates in the third molten metal induction pipe 50; A coupling 56 fixed between the shaft of the molten metal inlet opening / closing plunger 55 and the shaft of the molten metal inlet opening / closing cylinder 52; A support block support 61 coupled to the bottom surface of the cylinder support 60; A support block cylinder 62 installed upward on a bottom surface of the support block support 61; A support block 66 having a " U " cross section formed at the shaft end of the support block cylinder 62; And the support block 66 when the molten metal inlet opening / closing cylinder 52 moves the molten metal inlet opening / closing plunger 55 toward the mold and stops after sealing the molten metal inlet 53 by the above configuration. Is lifted by the operation of the support block cylinder 62 to be fitted as wrapped around the shaft of the molten metal inlet opening and closing plunger 55 in the rear of the coupling 56 to prevent the phenomenon that the molten metal inlet opening and closing plunger 55 is pushed backward. .

In addition, according to the apparatus for molding a light metal of the present invention in a vacuum environment, as in the gravity mold casting machine shown in FIG. 21, when the inflow of the molten metal 2 by gravity occurs above the mold 100, The second hot water induction pipe 40 including the hot water valve 45 and the hot water valve cylinder 41 vertically communicates with the first hot water induction pipe 30, and the hot water outlet of the second hot water induction pipe 40 is formed. The end of the 48 side may be configured to be connected to the mold 100.

Further, according to the apparatus for molding a light metal of the present invention in a vacuum environment, at the end of the third molten metal induction pipe 50, a vacuum fusion die casting machine shown in FIG. 17 and a vertical squeeze casting machine shown in FIG. 19 is connected to the mold 100 of the vertical molten metal forging machine shown in FIG. 19 and the die casting machine shown in FIG. 20, and the die of the gravity mold casting machine shown in FIG. 100) is available.

Prior to the present invention, referring to the seventh of seven patent documents indicated by the following reference, the molten metal in the form of droplets when the metal material introduced into the metal melting furnace in the vacuum melting chamber 20, which is a vacuum environment, is melted By flowing into the funnel, the impurity gas generated during the melting of the metal material is almost completely discharged from the molten metal to obtain pure molten metal.

Therefore, according to the present invention, by allowing the pure molten metal to flow into the molten metal induction pipe of the present invention in a continuously maintained vacuum environment, the molten metal is kept warm and stable, and thus the third molten metal induction pipe is not brought into contact with the platen. The direct connection of the mold and the distance between the tap and the mold minimizes the melting and casting of metals such as magnesium alloy, which has a high solidification rate.

In addition, according to the present invention, by melting the molten metal and the molten metal of the molten metal in a state in which the molten metal induction pipe is continuously maintained in a vacuum environment, it is possible to manufacture the casting of the pure light metal material by forming a mold of pure light metal material and bubbles of the cast product B. Molding defect rate such as impurity gas inflow and unforming is reduced and productivity is improved.

In addition, according to the present invention, the melt flow of the molding portion is smooth, so that the life of the mold and the machine is extended, it is environmentally friendly by not using greenhouse gases (CO2, SF6), there is an advantage such as manufacturing cost is reduced.

1 is a schematic configuration diagram of a device for molding a light metal in a vacuum environment according to an embodiment of the present invention.

2 is a perspective view of a device for molding a light metal in a vacuum environment according to an embodiment of the present invention.

Figure 3 is a perspective view showing a device for fixing the molten metal inlet opening and closing plunger of the present invention.

Figure 4 is a perspective view showing the operation of the device for fixing the melt inlet opening and closing plunger of the present invention.

5 to 16 are schematic configuration diagrams showing the operation of the apparatus for molding a metal mold in a vacuum environment according to an embodiment of the present invention in order.

Figure 17 is a block diagram connected to the die casting machine and the apparatus for molding a light metal of the present invention in a vacuum environment.

18 is a block diagram of the device and the vertical vacuum squeeze casting machine connected to the mold casting of the light metal of the present invention in a vacuum environment.

19 is a block diagram of a device for molding a light metal of the present invention in a vacuum casting mold and a vertical vacuum forging machine.

20 is a block diagram of a cold chamber die casting machine connected to the apparatus for molding a light metal of the present invention in a mold-forming vacuum environment.

FIG. 21 is a block diagram of a device for molding a light metal of the present invention in a vacuum environment and a vacuum gravity mold casting machine.

22 is a schematic configuration diagram of a device for molding a light metal in a vacuum environment according to another embodiment of the present invention.

Figure 23 is a schematic configuration diagram of a device for molding a light metal in a vacuum environment according to another embodiment of the present invention.

24 is a perspective view showing an integrated view of the first to third molten metal induction pipe of the present invention,

25 is a perspective view showing a separate type of the first to third molten metal induction pipe of the present invention.

Figure 26 is a state diagram showing the manner of fastening the separate first to third melt induction pipe of the present invention.

The present invention relates to a method and apparatus for molding a light metal in a vacuum environment. Therefore, the configuration of the apparatus of the present invention and its operation and operation sequence will be described with reference to FIGS. 1 to 26.

First, the present inventor has proposed the invention of the patent document described by the following reference in order to solve the problems of the prior art, the present invention is also proposed as a part thereof and is the invention following the patent document. Therefore, in order to understand this invention, recognition of the information of the following patent document is necessary. The present applicant somewhat cites the following patent documents while explaining the present invention, all for the convenience of explanation of the present invention.

[Patent Documents]

1. Korean Patent No. 10-0578257; Die Casting Machine

2. Korean Patent No. 10-0550144; Vacuum device of die casting machine

3. US Pat. No. 7,377,303; Die Casting Machine and Casting Method by Thereof Machine

4. Korean Patent No. 10-0572589; Vertical Vacuum Forging Machine

5. Korean Patent No. 10-0572581; Vacuum Gravity Mold Casting Machine

6. Korean Patent No. 10-0572583; Product forming method of vertical vacuum squeeze casting machine and apparatus

7. Korean Patent Application No. 10-2008-0105841; Vacuum dissolving apparatus for light metals and vacuum dissolving method using the apparatus

As shown in FIG. 1, the vacuum melting chamber 20, which is a vacuum environment, is provided, and one side of the vacuum melting chamber 20 penetrates and a tubular metal melting furnace 23 is installed inside thereof. And a first molten metal induction pipe formed by bending the molten metal melted in the metal melting furnace 23 (see FIG. 11) to be insulated and stored in a shape inclined downward toward the mold 100. 30) and a second hot water induction pipe 40 of tubular shape having a constant inclination in communication with one end of the first hot water induction pipe 30, and in communication with a lower end of the second hot water induction pipe 40. The molten metal inlet 53 is directly connected to the mold 100 without contacting the platen 200 while the second flange 51 is bound to the opposite end thereof. The molten metal induction pipe support 80 coupled to the platen 200 has a third molten metal induction pipe 50 coupled with a bolt And, the opening and closing means for controlling the tapping in the second molten metal induction pipe 40 and the vacuum in the second molten metal induction pipe 40, the first molten metal induction pipe 30, the vacuum melting chamber 20 when closed There is a molten valve 45 to maintain the environment, there is a molten metal inlet opening and closing cylinder 52 provided on the outer surface of the cylinder support 60 coupled to the mold 100 of the third molten metal induction pipe 50, In addition, there is a molten metal inlet opening and closing plunger 55 interlocked with the molten metal inlet opening and closing cylinder 52 and reciprocating in the third molten metal induction pipe 50. In addition, a heating means 70 is formed to electrically heat the outer circumferential surface of the first molten metal induction pipe 30, the second molten metal induction pipe 40, and the third molten metal induction pipe 50. Therefore, these are combined to change the state of the metal material 1 introduced into the vacuum melting chamber 20, which is a vacuum environment, into the melt 2, and the first melt induction pipe 30 communicated to the lower end thereof and the second communicated therewith. The third molten metal induction is stored in the molten metal induction pipe 40 and insulated to communicate with each other in a state in which the inside of the molding part 300 to the third molten metal induction pipe 50 of the mold 100 is made into a vacuum environment. The hot water is poured into the molten metal chamber 110 of the mold 100 via the pipe 50.

That is, the present invention briefly makes the molding part 300 of the mold 100 of the metal mold casting machine into a vacuum environment, melts the metal material under the vacuum environment, and continuously melts the molten melt 2 in a vacuum environment. Insulated and stored in the maintained state, the device for supplying to the molten metal chamber 110 of the mold 100, a structural feature of the present invention is the first to third molten metal induction pipe (30, 40, 50) Integrally formed and in communication with each other, the molten molten metal 2 in a vacuum environment is kept in a vacuum environment in the first and second molten metal induction pipes 30 and 40, and the third molten metal induction pipe 50 In order to tap out the molten metal chamber 110 of the metal mold | die 100, the molten metal valve 45 is provided in the inside of the 2nd molten metal induction pipe 40. As shown in FIG.

The molten valve 45 of the second molten metal induction pipe 40 for this purpose, the molten valve cylinder 41 is fastened to the upper end surface of the second molten metal induction pipe 40 for interlocking the shaft, and the molten valve cylinder ( 41) a ball-type molten valve cock 46 provided at the shaft end; and including the molten valve cock on the inner peripheral surface of the tapping hole 48 formed at the inner end of the second molten metal induction pipe 40 tapered by the upper and lower straits. (46) is interviewed to adjust the amount of tapping of the molten metal (2), and when closed, the vacuum environment inside the second molten metal induction pipe (40), the first molten metal induction pipe (30), the vacuum melting chamber (20) To be maintained.

That is, to form a hot water outlet 48 in the end portion of the second molten metal induction pipe 40; The inner circumferential surface of the tapping hole 48 is formed to be tapered to the upper and lower straits with a diameter wider, and the molten valve cock 46 penetrating through the inside of the second hot water induction pipe 40 is removed from the tapping hole 48. Interview with the inner circumferential surface tapered by Sangguk Strait. When the molten valve cock 46 moves upward from the interviewed position by the operation of the molten valve cylinder 41 in a state in which the molding part 300 of the mold 100 is sealed and the inside is made in a vacuum environment, The hot water outlet is opened, and the molten metal 2 therein flows down into the third molten metal induction pipe 50, and closes the hot water valve 45 and closes the hot water outlet 48 after introducing a predetermined amount. Therefore, in the present invention, it is possible to maintain the internal vacuum environment through the molten valve 45 and to adjust the amount of tapping of the molten metal 2.

Next, in the present invention, the first molten metal induction pipe 30, the second molten metal oil inducing pipe 40 and the third molten metal oil inducing pipe 50, as shown in Figure 24, in the form of a tube (all) It is preferable to be produced. As shown in FIG. 25, the first molten metal induction pipe 30, the second molten metal induction pipe 40, and the third molten metal induction pipe 50 are combined in the form of a pipe, and divided into 2 equal to 4 equal parts as necessary. It may be combined by welding or bolted together. That is, as shown in FIG. 25, the induction pipe may be divided into two to four equal parts, if necessary, and then coupled to each other.

In addition, as shown in FIG. 26, it is possible to fasten integrally by welding a "V" type joint to the wedge-shaped grooves at both ends of the induction pipe manufactured by dividing into parts, or to bolt each other with a flange at both ends of the induction pipe.

In addition, the vacuum fusion chamber 20 coupled to the first molten metal induction pipe 30 is coupled through the first flange 35, the molten funnel 21 of the upper and lower narrow shape inside the vacuum fusion chamber 20 Is connected to the upper end of the first molten metal induction pipe 30, the molten funnel 21 is provided with a heating means 22 for wrapping the outside and electrically heating. In addition, the molten metal funnel 21 is attached to the upper part of the molten metal height sensor 400, and when the molten metal sensor 2 detects the shortage of the molten metal 2, the metal material 1 is melted into the metal melting furnace 23. To be supplied).

In addition, the present invention is finished tapping the molten metal 2 in the second molten metal induction pipe 40 into the third molten metal induction pipe 50 to the mold 100, and at the same time, in the third molten metal induction pipe 50 The molten metal inlet opening and closing plunger 55 is advanced in the mold direction and the molten metal inlet 53 is sealed and stopped. At this time, the apparatus for fixing the molten metal injection opening and closing plunger 55 not to be pushed backward can be constituted.

The fixing device supports the molten metal inlet opening and closing cylinder 52 having the molten metal inlet opening and closing plunger 55 reciprocating in the third molten metal induction pipe 50 to the cylinder support 60, and the molten metal inlet opening and closing The coupling 56 is fixedly installed between the shaft of the plunger 55 and the shaft of the molten metal inlet opening / closing cylinder 52, and the support block support 61 is coupled to the bottom surface of the cylinder support 60. The support block cylinder 62 is installed upward on the bottom surface of the support block support 61, and the support block 66 having a “U” cross section formed at the shaft end of the support block cylinder 62 is provided. Therefore, when they are combined and the molten metal inlet opening / closing cylinder 52 advances the molten metal inlet opening / closing plunger 55 to seal the molten metal inlet 53 and then stops, the supporting block 66 is a supporting block cylinder 62. By rising by the operation of the) is fitted to wrap around the shaft of the molten metal injection opening and closing plunger 55 in the rear of the coupling 56 to prevent the phenomenon that the molten metal injection opening and closing plunger 55 is pushed backward (see FIG. 4).

In the present invention, the connected melt induction pipe (30, 40, 50) is connected to and fixed to the mold 100 of the mold casting molding machine, the outer surface of the melt induction pipe (30, 40, 50) is electrically heated To form a sufficient space so that the heating means 70 does not contact the platen 200, and by fastening the second flange 51 to one side of the molten metal induction pipe support 80 by bolts the molten metal induction pipe 30 , 40, 50). At this time, the molten metal inlet 53 of the third molten metal induction pipe 50 is sealed to connect the mold 100 and the vacuum environment.

In addition, the present invention includes a melt valve 45 and a melt valve cylinder 41 according to the case where the injection of the molten metal 2 by gravity from the upper side of the mold 100, such as a gravity mold casting machine, the first The second molten metal induction pipe 40 communicating with the molten metal induction pipe 30 is made vertical, and the end of the outlet 48 side of the second molten metal induction pipe 40 can be connected to the mold 100. .

According to the present invention, at the end of the third molten metal induction pipe 50, the vacuum melting die casting machine shown in FIG. 17, the vertical squeeze casting machine shown in FIG. 18, the vertical melt forging machine shown in FIG. It is possible to connect the mold 100 of the die casting machine as shown in the drawing, and to connect the mold 100 of the gravity mold casting machine shown in FIG. 21 to the end of the second melt induction pipe 40.

In addition, the material injection device (not shown) and the light metal melting furnace 23 connected to the vacuum melting chamber 20 of the present invention may be provided with two or more to increase the amount of melting of the molten metal 2.

Hereinafter, with reference to the accompanying drawings will be described in detail with respect to the configuration and operation of the device for molding a light metal in a vacuum environment according to the present invention.

1 is a schematic configuration diagram of a device for molding a light metal in a vacuum environment according to an embodiment of the present invention, Figure 2 is a perspective view of a device for molding a light metal in a vacuum environment according to an embodiment of the present invention.

Referring to FIGS. 1 and 2, a device for molding a light metal of the present invention in a vacuum environment includes a light metal, such as a magnesium alloy, which belongs to an active metal that is unstable at melting in the air and rapidly solidifies at a temperature below the melting point. It is to inject into the molding part of mold quickly and stably without solidification under vacuum environment. The vacuum fusion chamber 20, the light metal melting furnace 23 and the heating means 24, Patent Document 7 (Korean Patent Application No. 10-2008-0105841; vacuum melting apparatus of light metal and vacuum melting method using the apparatus Since it is the same as the method published in), detailed description thereof will be omitted since it may obscure the subject matter of the present invention.

As shown in FIG. 2, the molten funnel 21 is vacuum melted in the form of a normal light lowering narrow so that the molten metal 2 melted from the metal melting furnace 23 in the vacuum melting chamber 20 flows in and flows easily. It is mounted on the lower part in the chamber 20. In addition, a hole is formed in the lower portion of the molten metal funnel 21, the hole is extended downward to form a molten metal moving tube, the lower surface of the molten metal moving pipe connected to the upper surface of the first molten metal induction pipe 30 Electrical heating means 22 is provided on the outer circumferential surface of the molten funnel 21.

The first molten metal induction pipe 30 is in the form of a pipe tube, as shown in communication with the vacuum melting chamber 20, the lower end of the first molten metal induction pipe 30, the second molten metal induction Penetrating one surface of the tube 40 is characterized in that the communication with each other. In this case, the vacuum melting chamber 20 and the first molten metal induction pipe 30 are preferably provided with a first flange 35 and fastened by bolts. The first molten metal induction pipe 30 has a vacuum melting shape. According to the position where the chamber 20 is installed, it is configured to be inclined downward in the direction of the mold 100 and provided with an electrical heating means 70 on the outer circumferential surface to facilitate the flow and storage of the molten metal 2 continuously.

Accordingly, embodiments of the present invention will be described in detail with reference to FIGS. 22 and 23.

The second molten metal induction pipe 40 is in the form of an inclined pipe tube as illustrated, and communicates with a lower end of the first molten metal induction pipe 30 by passing through one surface of the second molten metal induction pipe 40. The lower end portion of the second molten metal induction pipe 40 communicates with one surface of the third molten metal induction pipe 50, and the molten valve cylinder 41 is connected to the upper surface of the second molten metal induction pipe 40. To combine. And a molten valve 45 which is opened and closed in cooperation with the molten valve cylinder 41 in the second molten metal induction pipe 40 and a ball-shaped molten valve at the shaft end of the molten valve 45. The cock 46 is formed, and the tapping hole 48 is formed at the lower end of the inside of the second molten metal induction pipe 40, and the diameter of the tapping hole 48 is tapered to the upper and lower straits toward the upper side. Form. In addition, the molten valve cock 46 is interviewed and sealed on the inner peripheral surface tapered by the upper and lower strait of the hot water outlet 48. In this case, the molten metal 2 continuously melted in the vacuum melting chamber 20, which is the vacuum environment, is formed on the molten valve cock 46 by a sealing operation of the molten valve 45. Heating means for storing the two molten metal induction pipe 40 and the first molten metal induction pipe 30, and electrically heated on the outer peripheral surface of the first molten metal induction pipe 30 and the second molten metal induction pipe 40 ( 70) to warm the molten metal (2) stored in the molten metal induction pipe (30, 40).

The third molten metal induction pipe 50 is in the form of a pipe tube inclined downward by about 5 ° toward the mold 100 as illustrated, and passes through one surface of the third molten metal induction pipe 50 to form a second molten metal. It is in communication with the lower end of the induction pipe 40, the one end of the third molten metal induction pipe 50 does not contact the platen 200, the molten metal chamber 110 or the mold 100 of the mold 100 directly In communication with the forming part 300 of the second melt induction pipe 50, the opposite end of the second flange 51 is formed, the second flange 51 is fixed to the platen 200 Fasten with bolts to the tube support (80). In addition, by installing the molten metal inlet opening and closing plunger 55 interlocked with the molten metal inlet opening and closing cylinder 52 in the third molten metal induction pipe 50, the molten metal 2 solidifies in the third molten metal induction pipe 50. By the forward operation of the molten metal inlet opening and closing plunger 55 without flowing into the molten metal chamber 110 of the mold 100 or the molding part 300 of the mold 100 can be quickly and precisely cast. Make sure

Figure 3 is a perspective view showing a device for fixing the molten metal inlet opening and closing plunger 55 of the present invention, the molten metal inlet opening and closing cylinder on one side of the molten metal induction pipe support 80 fixed to the platen 200 as shown 52 is installed toward the molten metal inlet 53, and the molten metal inlet opening / closing plunger 55 connected to the shaft of the molten metal inlet opening / closing cylinder 52 passes through the molten metal induction pipe support 80 to form a third molten metal induction pipe ( A coupling 56 is coupled between the shaft of the molten metal inlet opening / closing plunger 55 and the shaft of the molten metal inlet opening / closing cylinder 52 to provide a reciprocating operation in the interior of the cylinder holder 60. Support block support 61 is coupled to the bottom surface, the support block cylinder 62 is installed upward on the bottom of the support block support 61, the end of the support block cylinder 62 'U' character The supporting block 66 of the form is coupled.

Figure 4 is a perspective view showing the operation of the device for fixing the molten metal inlet opening and closing plunger 55 of the present invention, the molten metal injection hole opening and closing plunger 55 at the same time as the tapping end as shown in the mold (100) Coupling the support block 66 having a "U" cross-section connected to the support block cylinder 62 when the advancing in order to guide to the molten metal chamber (110) and closed after stopping the molten metal inlet (53) (56) By raising and lowering the shaft of the molten metal inlet opening and closing plunger 55 to the rear space so that the coupling 56 accumulates on the support block 66, the molten metal inlet opening and closing plunger 55 is pressurized during the pressurization operation of the molten metal pressure plunger 120. ) Is not pushed backwards and stable injection is possible.

Therefore, in the casting of a light metal alloy such as magnesium alloy having high activity and rapidly reacting with oxygen at a melting point or higher and having a high explosive rate and solidifying at a melting point or lower, the present invention provides a hot water outlet 48 and a mold 100 Provides a device for molding a light metal in a vacuum environment with a minimum distance from). This provides higher castability compared to the existing mold casting technology by using the degassed light metal molten metal (2) obtained by the method of Patent Document 7, and maximizes the characteristics of basic vacuum casting to produce high quality products. Do. Here, the material injection device (not shown) is the same as the material injection device disclosed in the vacuum device (Korean Patent No. 10-0550144, US Patent No. 7,377,303) of the die casting machine of Patent Documents 2 and 3, and the vacuum fusion chamber (20) and the metal melting furnace 23, the heating means 24, the molten funnel 21 and the heating means 22 is the vacuum melting apparatus of Patent Document 7 (Korean Patent Application No. 10-2008-0105841) Same as Therefore, the detailed configuration and operation method of the material injection device (not shown), the vacuum melting chamber 20, the metal melting furnace 23 and the heating means 24, the molten funnel 21 and the heating means 22 are described in the patent literature. Since it is the same as the method published in 1, 2, and 7, the detailed description thereof will be omitted since it may obscure the subject matter of the present invention.

In addition, Figures 5 to 16 is a schematic block diagram showing the operation of the apparatus for molding a light metal in a vacuum environment according to an embodiment of the present invention in sequence, through which the mold casting molding light metal according to the invention in a vacuum environment The method will be described in detail.

S1: Preparatory Steps for Metallic Materials

As shown in FIG. 5, the inlet pipe valve 11 is opened to close the molten valve 45 and the side valve 12 to make the inside of the vacuum fusion chamber 20 into a vacuum environment. (10) It is positioned outside the inlet, and advances the material loading plunger 13 as shown in FIG. 6 to push the metal material 1 into the material injection pipe 10, and then the material loading plunger 13 as shown in FIG. Retract and close the input pipe valve (11).

S2: charging step of metal material

As shown in FIG. 8, the material insertion plunger 13 is advanced to block and seal the plug hole (not shown) formed in the valve plate of the inlet pipe valve 11, and then vacuum the inside of the material input pipe 10 (see Patent Document 1). 2, and then the metal valve 1 is opened while the side valve 12 is opened as shown in FIG. 9 while maintaining the same degree of vacuum between the material injection pipe 10 and the vacuum fusion chamber 20. It is pushed into the material loading plunger 13 and placed in the inclined metal melting furnace 23.

Subsequently, the material loading plunger 13 is reversed as shown in FIG. 10 and the side valve 12 is closed, and then the metal material 1 slides to the lower portion of the inclined metal melting furnace 23 and is stopped by the stopper 25. In the metal melting furnace (23).

S3: melting and degassing of the metal material

11, the heating means 24 of the inclined metal melting furnace 23 is heated to quickly melt the metal material 1 to be melted into the molten metal 2, and the molten molten metal 2 immediately forms an inclined surface. It flows down inside the molten funnel (21). At this time, since the molten metal 2 gradually flows down from the molten portion of the metal material 1, the molten metal flows in the form of droplets like water droplets, thereby increasing the surface area and almost all of the gases generated when the light metal is melted. It is discharged and the pure water melt 2 (refer the technical content of the said patent document 7) can be obtained.

S4: Warming and Storage Step of the Melt

As shown in FIGS. 11 to 12, the temperature inside the molten metal induction pipes 30, 40, and 50 is 10 to 100 ° C. lower than the melting point of the metal material by the heating means 70 on the outer circumferential surface of the molten metal induction pipes 30, 40, and 50. After warming to a temperature, the degassed molten metal 2 is passed through the molten funnel 21 to the inside of the second molten metal induction pipe 40, the first molten metal induction pipe 30, and the molten funnel 21. Accumulate and fill by repeating the process of S1 to S3.

S5: tapping step of molten metal

Thereafter, as shown in FIG. 13, the molding part 300 of the mold 100 is sealed, and then the inside of the mold 100, the inside of the third melt induction pipe 50, the vacuum melt chamber 20, and the first melt induction pipe ( 30) and the third molten metal induction pipe 50 is opened by the molten metal valve 2 through the hot water outlet 48 by opening the molten valve 45 in the same vacuum in the second molten metal induction pipe 40. It flows into the inside of the metal mold 100 via the inside, and closes the molten metal valve 45 as shown in FIG. 14 to stop tapping of the molten metal 2.

S6: pressurizing step of the melt

As shown in FIG. 15, when the molten metal 2 remaining in the third molten metal induction pipe 50 is pushed into the molten metal chamber 110 of the mold 100 by advancing the molten metal inlet opening / closing plunger 55, the molten metal inlet 53 ), The molten metal inlet opening and closing plunger 55 is stopped, and the supporting block 66 is lifted according to the characteristics of the following mold casting molding machine prepared to perform mold casting molding in a vacuum state, as shown in FIG. 16. (2) is finally pressurized to the molding part 300 of the mold 100, and then the mold 100 is cooled to obtain a product that is vacuum cast into pure molten metal 2, according to the characteristics of the following mold casting molding machine. The construction of the invention may vary as described below in FIGS. 17-21.

Figure 17 is a block diagram of a device and a die casting machine connected to the light metal of the present invention in a vacuum environment mold casting molding, Figure 18 is a device and a vertical vacuum squeeze device for the metal mold casting molding in a vacuum environment of the present invention This is a schematic diagram of a casting machine connected.

19 is a block diagram of an apparatus for forming a mold casting of a light metal of the present invention in a vacuum environment and a vertical vacuum forging machine. FIG. 20 is an apparatus for forming a mold casting of a light metal of the present invention in a vacuum environment. This is a schematic diagram of a cold chamber die casting machine.

FIG. 21 is a block diagram of a vacuum gravity mold casting machine and a device capable of molding a light metal of the present invention in a vacuum environment.

17 to 21, the apparatus for molding a light metal of the present invention in a vacuum environment may be connected to various types of mold casting molding machines for casting and vacuum casting.

The mold casting molding machine includes at least a mold 100 and a molten metal chamber 110, for fixing the molten metal pressure plunger 120 and the molten metal inlet opening and closing plunger 55 as shown in FIGS. 17 and 18 according to the characteristics of the apparatus. Apparatus 56, 61, 62, 66 may be provided, and the apparatuses 56, 61, 62, 66 for fixing the melt pressure plunger 120 and the melt inlet opening and closing plunger 55 as shown in Figs. The molten metal inlet opening and closing plunger 55 in the third molten metal induction pipe 50 can be used as the final pressurizing means, and the molten metal pressurizing plunger 120 and the molten metal inlet opening and closing plunger 55 and the molten metal inlet opening and closing are shown in FIG. Without the apparatus 56, 60, 61, 62, 65, 66 for fixing the plunger 55 and the third molten metal induction pipe 50, the second molten metal induction pipe 40 is the molten metal chamber of the mold 100. 110 or the molding unit 300 of the mold 100 may be connected.

At this time, the mold casting molding machine of FIGS. 17 and 18, 19 and 21 is a device proposed by the present invention, the die casting machine of FIG. 17 may be referred to the configuration of Korean Patent No. 10-0578257, the vertical vacuum of FIG. Squeeze casting machine can be referred to the configuration of Korean Patent No. 10-0572583. In addition, the vertical vacuum molten forging machine of FIG. 19 may refer to Korean Patent No. 10-0572589, and the vacuum gravity mold casting machine of FIG. 21 may refer to the configuration of Korean Patent No. 10-0572581, each of these mold casting molding machines. Detailed configuration and description of the operation may be omitted since it may obscure the subject matter of the present invention.

FIG. 22 is a schematic configuration diagram of an apparatus for molding a light metal in a vacuum environment according to another embodiment of the present invention. As shown in FIG. 22, the first molten metal induction pipe 30 is formed at the lower end of the vacuum melting chamber 20. The two molten metal induction pipe 40 is connected vertically without bending between one side.

FIG. 23 is a schematic configuration diagram of a device for molding a light metal in a vacuum environment according to another embodiment of the present invention. As shown in FIG. 23, without the third molten metal induction pipe 50, the molten metal valve 45 and the molten metal are shown. The second molten metal induction pipe 40 including the valve cylinder 41 is vertically connected to the mold 100. The method as described above is to mold-cast the light metal of the present invention in a vacuum environment as shown in FIG. The device can be configured in connection with a mold casting machine such as a gravity mold casting machine.

24 is a perspective view of a method in which the first, second, and third molten metal induction pipes of the present invention are integrally formed.

25 is a perspective view of the first, second and third molten metal induction pipes of the present invention separated, and FIG. 26 is a perspective view of the first, second and third molten metal induction pipes of the present invention bonded together. As shown in FIG. 25, the molten metal induction pipe in the separated state is welded as shown in FIG. 26 by welding the V-shaped joint.

As described above, although the present invention has been described with reference to one embodiment shown in the drawings, this is merely an example, and those skilled in the art may make various modifications and other equivalent embodiments therefrom. It will be understood that such modifications and other embodiments are included in the following claims.

Claims (15)

In the device for molding a light metal in a vacuum environment, Vacuum fusion chamber 20 which is a vacuum environment; A metal melting furnace 23 through which one side of the vacuum melting chamber 20 penetrates and is installed in a tubular shape; A first molten metal induction pipe (30) having a tubular shape to draw and insulate the molten metal (2) melted in the metal melting furnace (23); A second molten metal induction pipe 40 in the form of a tube communicating with one end of the first molten metal induction pipe 30; The molten metal inlet 53, which is in communication with the lower end of the second molten metal induction pipe 40 and does not contact the platen, is directly connected to the mold 100, and the second flange 51 is bound to the opposite end thereof to the plaque. A third melt induction pipe 50 coupled to the melt induction pipe support 80 fixed to the tongue 200; Opening and closing means for controlling the tapping in the second molten metal induction pipe 40, and when sealed, the vacuum environment inside the second molten metal induction pipe 40, the first molten metal induction pipe 30, the vacuum melting chamber 20 is maintained Molten valve 45 to be made; A molten metal inlet opening / closing cylinder (52) provided on an outer surface of the cylinder support (60) coupled to the mold 100 of the third molten metal induction pipe (50); A molten metal inlet opening / closing plunger 55 interlocked with the molten metal inlet opening / closing cylinder 52 and reciprocating in the third molten metal induction pipe 50; And heating means (70) for electrically heating the outer circumferential surface of the first molten metal induction pipe (30), the second molten metal induction pipe (40), and the third molten metal induction pipe (50). Mold casting and molding in a vacuum environment. The method of claim 1, The molten valve 45 is a molten valve cylinder 41 fastened to the upper end surface of the second molten metal induction pipe 40 for interlocking the shaft, and the molten valve cock 46 provided at the shaft end of the molten valve cylinder 41. Apparatus for molding a light metal in a vacuum environment, characterized in that it comprises a). The method of claim 1, The first molten metal induction pipe (30), the second molten metal induction pipe (40) and the third molten metal induction pipe (50) in the form of a tube, characterized in that the apparatus for molding a light metal in a vacuum environment. The method of claim 1, The first molten metal induction pipe 30 and the second molten metal induction pipe 40 and the third molten metal induction pipe 50 are combined in the form of a pipe, but divided into two or more parts as necessary, and then integrated. Mold casting molding of light metal in vacuum environment. The method of claim 4, wherein When the first molten metal induction pipe 30, the second molten metal oil inducing pipe 40 and the third molten metal oil inducing pipe 50 are divided into two or more portions, flanges are provided at both ends to be connected by bolts. Mold casting molding of light metal in vacuum environment. The method of claim 4, wherein When the first molten metal induction pipe 30, the second molten metal induction pipe 40 and the third molten metal induction pipe 50 are divided into two or more portions, a “V” shaped joint is formed at both ends, and the spot is welded. A device for molding a light metal in a vacuum environment, characterized in that for connecting. The method of claim 1, The molten metal induction pipe (30, 40, 50) is a device for molding the molding of a light metal in a vacuum environment, characterized in that inclined downward toward the mold (100). The method of claim 1, The molten metal induction pipe (30, 40, 50) is a device for forming a metal mold in a vacuum environment, characterized in that the molten funnel (21) connecting seat is formed in the upper and lower narrow shape inside the upper end. The method of claim 1, Apparatus for forming a mold casting a light metal in a vacuum environment, characterized in that the molten metal induction pipe (30, 40, 50) of the molten metal injection port 53 and the die casting machine 100 directly connected. The method of claim 1, Apparatus for molding a light metal mold in a vacuum environment, characterized in that the molten metal induction pipe (30, 40, 50) of the molten metal injection port 53 and the mold 100 of the vertical squeeze casting machine directly connected. The method of claim 1, The apparatus for molding a light metal mold in a vacuum environment, characterized in that the molten metal induction pipe (30, 40, 50) of the molten metal inlet 53 and the mold 100 of the vertical molten metal forging machine directly connected. The method of claim 1, The second molten metal induction pipe 40, the end of the mold casting apparatus for forming a light metal in a vacuum environment, characterized in that the direct connection of the mold 100 of the gravity mold casting machine. In the method of casting and casting a light metal in a vacuum environment, Melting the light metal material (1) in the vacuum fusion chamber (20) in which the vacuum environment is maintained; The first molten metal induction pipe 30 and the first molten metal induction pipe 30, the second molten metal induction pipe 40, and the third molten metal induction pipe 50 are closed to close the molten metal valve 45. Maintaining the inside of the second molten metal induction pipe 40 and the vacuum melting chamber 20 in a vacuum environment state;  Introducing the molten metal (2) into the first and second molten metal induction pipes (30, 40) through the molten funnel (21), Insulating and storing the molten metal 2 in the first and second molten metal induction pipes 30 and 40 by heating means 70 for wrapping and heating the outer circumferential surfaces of the first and second molten metal induction pipes 30 and 40. Steps, After combining the stationary mold and the movable mold to make the casting space 300 and the molten metal chamber 110 and the third molten metal induction pipe 50 into a vacuum environment, Opening the molten valve 45 and tapping the thermally stored molten metal 2 into a third molten metal induction pipe 50; Tapping the tapping molten metal 2 into the molten metal chamber 110; Closing the hot water inlet 48 and closing the molten metal inlet 53; And pressing the molten metal (2) in the molten metal chamber (110) by the molten metal pressure plunger (120). The method of claim 13, The molten metal induction pipe flange 55 is supported on the molten metal induction pipe support 80 installed in the platen 200, and the vicinity of the molten metal inlet 53 of the third molten metal induction pipe 50 does not contact the platen 200. Preventing the temperature drop around the molten metal inlet (53) by directly connecting to the mold (100) to mold casting molding of a light metal in a vacuum environment. The method of claim 13, When the support block 66 is pushed between the coupling 56 of the molten metal inlet opening and closing plunger 55 and the cylinder support 60, the molten metal inlet opening and closing plunger 55 does not retreat when pressurized by the molten metal pressure plunger 120. Method for molding a light metal in a vacuum environment, characterized in that it further comprises the step of.

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