KR101808336B1 - Liquid forged and squeeze casting machine by tilting casting and casting method thereof - Google Patents

Abstract

The present invention relates to a molten metal forging casting machine by tilting casting and a casting method thereof. The molten metal forging casting machine comprises: a tilting casting apparatus (A) which is a casting machine to inject molten metal to a mold; and a pressing apparatus (B) pressing and forging the injected molten metal. The tilting casting apparatus (A) comprises: a mold body (4) installed on a support die of a cast body by a hinge means (3) to be able to rotate; a balance spring (8) installed on one side portion of the hinge means (3) and keeping the horizontal balance according to the amount of the molten metal injected to the mold (7); a tilting cylinder apparatus (10) fixated to the support die (2), rotating the mold body (4) to give a slope to the same, and having a tilting cylinder rod (9); the mold (7) provided in the mold body (4) and having a molding unit (11), a runner (12), and a sprue (13); and a cooling apparatus (14) installed in the mold (7) and cooling the injected molten metal. Accordingly, the molten metal forging casting machine is capable of producing castings for example, automobile aluminum parts such as wheel cylinders, master cylinders, and calipers having maximized high efficiency, high density, and durability without bubbles or pores by the tilting casting function and the molten metal forging casting.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a casting machine for casting molten metal by tilting casting and a casting method thereof,

The present invention relates to a casting machine for molten metal by tilting casting, and more particularly, to a casting machine for casting molten metal by tilting casting, and more particularly, to a casting machine for casting molten steel by tilting casting and liquid forged and squeeze casting. The present invention relates to a molten forging tin casting machine and a casting method thereof by tilting casting which provides a maximized automobile aluminum part (for example, a wheel cylinder, a master cylinder and a caliper).

Generally, most of the automobile aluminum parts, especially the brake production casting system, are mostly horizontal type and the general tilting casting is mostly used.

The brake of the automobile aluminum part is an important device for decelerating or stopping the vehicle during driving and maintaining the parking state. The brake device includes a parking brake used when the vehicle is parked, The main brake includes a pneumatic brake that generates the braking force of the vehicle by using air pressure and a hydraulic brake that generates the braking force of the vehicle by using the hydraulic pressure.

The hydraulic brake includes a master cylinder for converting the pressure of the brake pedal to hydraulic pressure, a wheel cylinder for receiving the hydraulic pressure of the master cylinder to generate a braking force by pushing the brake shoe onto the drum, And a brake line for forming a brake line.

Since the master cylinder is required to have precision and tightness to the extent that oil pressure does not leak, the piston body is built in with the main body as a cylinder after casting the main body using an aluminum alloy material.

Most of the casting systems casting automobile aluminum parts such as brakes are horizontal type and general tilting casting, and their quality is very low due to various production efficiency and working environment as well as casting density.

Since the air layer is formed in the inside of the casting due to the presence of pores, bubbles and oil during casting, unbalance due to high pressure occurs during operation and heat transfer is reduced.

As a result, heat is generated in the casting, and the durability of the cast parts and main parts is deteriorated.

One. Korean Patent Publication No. 10-2015-0116808 (published on October 16, 2015). 2. Korean Registered Patent Publication No. 10-0990999 (issued on October 29, 2010).

Accordingly, the present invention has been made to solve the above problems, and an object of the present invention is to provide a high-efficiency, high-density and high-density casting (For example, a wheel cylinder, a master cylinder, and a caliper) that maximizes durability, and a method of casting the casting forgings by tilting casting.

A first embodiment of the present invention for achieving the object of the present invention is a tilting casting apparatus for casting molten metal into a casting die mold as a casting machine, a pressing apparatus for pressing and forging the injected molten casting, An ejecting device for extracting the molten metal, and a flushing device for cleaning the oil in the mold.

The tilting casting apparatus includes a mold mold body configured to be rotatably installed on a support die of a frame body by hinge means;

A balance spring installed at one side of the hinge means to adjust the horizontal balance according to the amount of the molten metal injected into the mold;

A tilting cylinder device fixed to the support die and configured to rotate the mold mold body so as to incline the tilting cylinder rod;

A mold mold formed on the mold body and composed of a mold forming part, a runner, and a sprue;

And a cooling device installed in the mold mold to cool the injected molten metal.

And a load cell at a lower portion of the hinge means.

And a control unit for controlling the height of the servomotor and the motor skew connected and coupled between the ladle barge and the servomotor, the servomotor being provided in the upper frame of the mold and adjusting the angle of the ladle barrel and the ladle barge, And a height adjustment cylinder for the servomotor.

And a forging die for pressing and forging the injected molten metal to form a forging die for crushing and forging a molten metal by vertically moving the press by a hydraulic cylinder having a squeeze function.

A second embodiment of the present invention is a mold having a tilting function for preparing a mold mold capable of holding a tilted angle by inclining at a predetermined angle by attaching a mold mold having a forming section to a mold mold body of a caster, A mold preparation step;

A mold mold tilting angle holding step of operating the tilting cylinder so as to be inclined at a predetermined angle by the tilting cylinder rod;

A step of injecting molten aluminum through a sprue by means of a ladle bar, which is a device for injecting molten metal, in a state in which the forming part of the mold is inclined at a predetermined angle and has an inclination angle;

A cooling step of cooling the molten metal in the forming part by circulating the cooling water in the cooling device when the molten metal is completely filled in the molding part of the mold mold;

Before the molten metal starts to be cooled by the cooling device in the molding part of the mold, and the pressure is applied to the molten metal in the molding part by the forging die of the press device before the solidification, the remaining moisture in the molten metal, Thereby forming a solidified material outside the upper inlet of the molded part;

And an extraction and cutting step of, when the forged molten metal is completely solidified, extracting the casting product from the molding part of the mold mold by the ejector device and cutting the finished product with reference to the cutting line when the extraction is performed to complete the casting.

The present invention as described above can be applied to a casting (for example, a wheel cylinder, a master cylinder, and a caliper) that maximizes durability and high efficiency without bubbles or pores by tilting casting and liquid forged & squeeze casting And the like) can be manufactured.

That is, as a tilting casting function, the molding portion of the mold mold is inclined at a predetermined angle, and the molten metal is injected in a tilted state, so that all the air in the molding space is filled and the molten metal is filled. Forged & squeeze casting function is to perform the liquid forging in the molten metal in the forming part so that the residual moisture in the molten metal, pores and bubbles due to the oil are not generated.

That is, the remaining shrinkage cavity rises to the outside of the upper part of the upper part of the molding part to form a solidified product, whereby a high-density cast product with a dense tissue density can be produced.

When such a high-density casting with a dense texture density is used for an automobile aluminum part such as a wheel cylinder, a master cylinder and a caliper, durability can be ensured even when a high pressure and a high temperature are generated, the stability can be maximized and the efficiency as a casting can be maximized.

1 is a whole plan view of a casting machine for forging molten steel by tilting casting according to the present invention.
Fig. 2 is a whole front view of a casting machine for forging molten steel by tilting casting according to the present invention. Fig.
Fig. 3 is a front view of a "tilting casting device" and a "pressing device" in the "molten steel forging casting machine by tilting casting" according to the present invention.
4 is an enlarged front view of the "tilting casting apparatus and mold" in the "casting machine for forging molten steel by tilting casting "
5 is an enlarged front view of the "pressing apparatus" in the "molten metal forging caster by tilting casting" according to the present invention.
Fig. 6 is an explanatory view of molding a casting by a mold mold in a "casting machine forging molten steel by tilting casting " according to the present invention.
7 is an enlarged view of a "cooling device" in the "molten metal forging caster by tilting casting " according to the present invention.
Fig. 8 is a process diagram showing the casting of the casting by the "casting machine for forging molten steel by tilting casting" according to the present invention.
Fig. 9 is an external view of a product of a wheel cylinder of an automobile aluminum part as an example of a casting product cast by a "molten metal forging tin casting machine by tilting casting" according to the present invention.
10 is a cross-sectional photograph of a product of a wheel cylinder of an automobile aluminum part as an example of a cast product cast by a "molten metal forging tin casting machine by tilting casting" according to the present invention.

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

The terms defined in describing the present invention are defined in consideration of functions and forms in the present invention, and should not be construed as limiting the technical elements of the present invention.

While the present invention has been described in connection with certain embodiments, it is obvious that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the invention. It is to be understood, however, that the invention is not intended to be limited to the particular forms disclosed, but on the contrary, is intended to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

In the drawings, the components are expressed by exaggeratingly larger (or thicker) or smaller (or thinner) in size or thickness in consideration of the convenience of understanding, etc. However, It should not be.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the contextual meaning of the relevant art and are not to be construed as ideal or overly formal in meaning unless expressly defined in the present application .

First, an embodiment of the present invention will be described with reference to the accompanying drawings.

1 and 2, a tilting casting apparatus A for injecting a molten metal into a mold mold of a casting mold as a casting machine M, An ejector device C for extracting a casting product cast by forging the molten metal, and a flushing device D for cleaning the oil in the mold.

The tilting casting apparatus A comprises a mold body 4 rotatably mounted on a support die 2 of a frame 1 by means of a hinge means 3 as shown in Figs.

The hinge means 3 is composed of a hinge shaft 5 and hinge ribs 6 and 6a.

And a balance spring 8 which is installed on one side of the hinge means 3 and adjusts the horizontal balance according to the amount of the molten metal injected into the mold mold 7.

The tilting cylinder device 10 includes the tilting cylinder rod 9 fixedly mounted on the support die 2 to be inclined and rotated by rotating the mold mold body 4.

A mold mold 7 formed on the mold body 4 and composed of a molding part 11 and a runner 12 and a sprue 13; Thereby forming a cooling device (14).

7, the cooling device 14 constitutes a cooling water core 15, a cooling water supply passage 16 and a cooling water discharge passage 16a constituted by the interior of the lower side of the mold mold 7 and serves as a cooling water supply passage 16 Is connected to the cooling water inlet (17) and the cooling water discharge passage (16a) is connected to the cooling water outlet (18).

The cooling water supply passage 16 and the cooling water discharge passage 16a are formed in a double structure in which the cooling water supply passage 16 is formed at the center and the cooling water discharge passage 16a is formed outside the cooling water supply passage 16 do.

A load cell (19) is formed on the lower side of the hinge means (3). A master scale 20 is mounted on the load cell 19.

A servomotor 22 installed in the frame body 1 and adapted to inject the molten metal and adjusting the angle of the ladle barrel 21 and the ladle barrel 21 and the connection between the ladle barrel 21 and the servomotor 22 And constitutes a height adjusting cylinder 24 for the servomotor that adjusts the height of the combined motor skew 23 and the servomotor 22.

A forging die 27 for pressing and forging the molten metal by lifting up and down the press 26 by means of a hydraulic cylinder 25 having a squeeze function as a pressing apparatus B for pressing and forging the injected molten metal, .

In order to cast automobile aluminum parts (for example, a wheel cylinder, a master cylinder, and a caliper), the tilting cylinder device 10 is operated to form the mold body 4 by the tilting cylinder rod 9 Push up and rotate the hinge shaft 5 as a starting point and place it aslant.

In this case, the balance spring 8 in the form of a coil spring is also bent while generating a repulsive force.

1 to 3, the mold body 4 is balanced in a tilted state about the balance spring 8.

In this state, molten aluminum is injected through the sprue 13 by the ladle barb 21.

When the molten metal starts to be injected, the molten metal is injected and injected on one slanted wall of the mold 13 and the runner 12, And is injected on the inner wall of the forming part 11.

In this case, all of the air in the forming part 11 escapes and air bubbles are not generated in the molten metal in the forming part 11.

When the molten metal starts to be injected into the forming part 11, the weight of the molten metal gradually increases in weight in a direction opposite to the starting point of the balance spring 8. In this case, the balance spring 8 ) Begins to be restored.

At the same time, the tilting cylinder rod 9 of the tilting cylinder device 10 supporting the mold body 4 also begins to be restored.

In this case, the tilting cylinder rod 9 is restored together with the balance spring 8 by discharging the hydraulic pressure under the control of a servo valve (not shown) constituted in the tilting cylinder device 10.

After the injection of the molten metal into the molding part 11 of the mold mold 7 is completed, the mold body 4 is restored to a horizontal state and the molding part 11 in the mold mold 7 is in a vertical state .

When the injection of the molten metal into the molding part 11 in the mold mold 7 is completed, the molten metal is transferred to the cooling device 14 by the rotation of the supporting die 2 with the pressing device B for pressing and forging the melted molten metal The press 26 is lowered by the operation of the hydraulic cylinder 25 as shown in Fig. 5 while cooling the molten metal, and the molten metal in the forming portion 11 is pressed by the forging metal mold 27 at this time.

That is, when the molten metal in the forming part 11 is pressed by the forging mold 27 as shown in FIG. 6, high-density castings can be produced without generating pores or bubbles due to moisture, oil content remaining in the molten metal .

The molten metal in the forming part 11 is cooled by the cooling water circulation of the cooling device 14 and the molten metal is forged by the forging metal mold 27 so that the remaining shrinkage holes in the molten metal are discharged to the forming part 11 ) To form a solidified product (g).

That is, it is possible to manufacture a high-density molten forging casting by Liquid Forging.

When the casting is performed as described above, when cutting is performed with reference to the cutting line (c) as shown in FIG. 6, the solidified product (g) due to the shrinkage cavity deviates from the range of the casting product.

When the casting is completed in the pressing apparatus B, the casting is transferred to the ejector apparatus C to extract the casting finished product in the mold mold 7. When the extraction is completed, the casting finished product is transferred to the flushing apparatus D, Clean the oil.

A method of casting a casting using a casting forging tin casting by the tilting casting of the present invention will be described with reference to FIG. 8 and will be described with reference to FIGS. 1 to 7 as necessary.

The mold mold 7 having the molding part 11 is mounted on the mold body 4 of the mold M and is tilted at a predetermined angle so as to be inclined at an angle of inclination The mold mold 7 is prepared.

The mold mold 7 is formed with a runner 12 at the inlet of the forming part 11 and a sprue 13 above the runner 12. The sprue 12 is inserted into the adjacent forming part 11) in which the molten metal is sequentially injected.

Second Step (S2) - In the step of maintaining the mold mold inclination angle, the mold mold 7 is operated by the tilting cylinder device 10 so as to be tilted at a predetermined angle by the tilting cylinder rod 9 to maintain the inclined state.

Further, the mold mold 7 causes the balance spring 8 to generate a repulsive force to prepare for return to the original state in a state in which the mold is maintained in the inclined state.

The third step S3 is a step of injecting the molten metal and automatically maintaining the mold in a horizontal state. The molten metal is molten by the molten metal of the molten metal by the ladle barrel 21, which is a molten metal injection device, Is injected through the sprue 13.

In this case, since the molding part 11 is inclined at a predetermined angle and the molten metal is injected in a tilted state, the molten metal is filled with the air in the molding space while the molten metal is injected through the mold sprocket, ) Are sequentially filled through the runner 12 to the neighboring forming part.

When the molten metal is filled in the mold part of the mold mold, the mold mold is automatically returned to its original state in a horizontal state automatically by the restoring force of the balance spring 8 and the tilting cylinder rod 9. When the molten metal is completely filled, And the molded part 11 maintains a vertical state.

(S4) - As the cooling step, when the molten metal is completely filled in the molding part 11 of the mold mold 7, the cooling water in the cooling device 14 is circulated to start cooling the molten metal in the molding part 11 .

(5) (S5) - In the molten forging step, before the molten metal is cooled by the cooling device (14) in the molding part (11) of the mold mold (7) The molten metal is lowered to the inside of the inlet of the forming part 11 by the pressing part 27 to apply pressure to the molten metal in the forming part 11 to increase the pores and bubbles due to moisture and oil remaining in the molten metal, And the solidified product (g) is formed on the outer side.

That is, as the molten metal in the forming part 11 is subjected to liquid forging, the remaining shrinkage holes in the molten metal rise to the outside of the upper part of the upper part of the forming part 11 to form a solidified product g, (Liquid Forged) is completed.

Step S6 - As the step of extracting and cutting, when the casting is finished, the casting finished product is extracted from the molding part of the mold mold by the ejector device C, and when the extraction is completed, cutting is performed based on the cutting line (c) do.

In this case, since the solidified product (g) due to the shrinkage cavity deviates from the range of the castings, high-quality castings of good quality are produced.

A photograph of the product cast by the above-described casting method is shown in FIG. 9 and FIG.

As can be seen from the cross section in FIG. 10, it can be seen that a high-density cast product having no bubbles or pores and having a dense texture density is produced.

The present invention has been made in view of the above problems, and it is an object of the present invention to provide a casting (for example, a wheel cylinder, a master cylinder, and a casting cylinder) that maximizes durability and high efficiency without bubbles or pores by a tilting casting function and a liquid forged & A car aluminum part such as a caliper can be manufactured.

That is, as a tilting casting function, the molding portion of the mold mold is inclined at a predetermined angle, and the molten metal is injected in a tilted state, so that all the air in the molding space is filled and the molten metal is filled. Forged & squeeze casting function is performed by performing liquid forged in the molten metal in the forming part, so that the remaining moisture in the molten metal, pores and bubbles due to oil content are not generated, that is, the remaining shrinkage hole rises to the outside of the upper part of the molding part Thereby forming a solidified product. As a result, a high-density cast product having a dense texture density can be produced.

When such a high-density casting having a high density of tissue density is used as a wheel cylinder, a master cylinder and a caliper, which are automobile aluminum parts, durability does not deteriorate even when high pressure and high temperature are generated, and efficiency as a casting can be maximized.

A: Tilting casting device B: Pressing device
C: Ejector device D: Flushing device
M: Casting machine
1: frame 2: die
3: hinge means 4: mold mold body
5: Hinge shafts 6, 6a: Hinge ribs
7: Mold mold 8: Balance spring
9: tilting cylinder rod 10: tilting cylinder device
11: forming part 12: runner
13: Sprue 14: Cooling device
15: cooling water core 16: cooling water supply passage
16a: Cooling water discharge passage 17: Cooling water inlet
18: cooling water outlet 19: load cell
20: Master Scale 21: Ladder ripples
22: Servo motor 23: Motor scooter
24: Height adjusting cylinder for servo motor 25: Hydraulic cylinder
26: Press 27: Mold for forging
c: Cutting line g: Solidification product

Claims (7)

A tilting casting apparatus (A) for injecting a molten metal into a mold mold of a mold as a casting machine,
A pressing apparatus B for pressing the molten metal to be forged,
The tilting casting apparatus (A) comprises a mold mold body (4) rotatably mounted on a support die of a frame body by a hinge means (3);
A balance spring 8 installed on one side of the hinge means 3 and adapted to balance the amount of molten metal injected into the mold mold 7;
A tilting cylinder device (10) fixed to the support die (2) and rotating the mold body (4) so as to be tilted and constituting a tilting cylinder rod (9);
A mold mold 7 formed on the mold body 4 and composed of a molding part 11, a runner 12 and a sprue 13;
And a cooling device (14) installed in the mold mold (7) and cooling the injected molten metal. The apparatus according to claim 1, further comprising a servomotor (22) installed in the frame (1) for injecting the molten metal and adjusting the angle of the ladle barrel (21) and the ladle barrel (21) (22), and a height adjusting cylinder (24) for a servo motor for adjusting the height of the servomotor (22). The pressing apparatus according to claim 1, wherein the pressing apparatus (B) comprises a forging mold (27) for pressing and forging a molten metal by vertically moving the press (26) up and down by a hydraulic cylinder (25) having a squeeze function Wherein the tungsten casting is carried out by a tungsten casting machine. The cooling device according to claim 1, wherein the cooling device (14) comprises a cooling water core (15) and a cooling water supply passage (16) and a cooling water discharge passage (16a)
Wherein the hinge means (3) comprises a hinge shaft (5) and hinge ribs (6) (6a). The method according to claim 1, wherein the runner (12) of the mold mold (7) is formed at the entrance of the molding section (11) composed of a plurality of molds Wherein the tungsten casting is carried out by a tungsten casting method. A mold mold (7) having a tilting function is mounted on a mold mold body (4) of a casting machine (M) by a mold die 7); < / RTI >
A second step S2 of operating the tilting cylinder device 10 to keep the mold mold 7 inclined at a predetermined angle by the tilting cylinder rod 9 as a mold mold tilting angle maintaining step;
The molten metal of aluminum material is supplied through the sprue 13 by means of the ladle barrel 21 as a molten metal injection device in a state where the molding part of the mold mold is inclined at a predetermined angle and has an inclination angle, The molten metal is filled in the forming part 11 and the mold 7 is automatically moved by the restoring force of the balance spring 8 and the tilting cylinder rod 9 A third step (S3) of causing the molding section (11) to maintain a vertical state so as to return to the original state in a horizontal state;
A fourth step (S4) of cooling the molten metal in the forming part (11) by circulating the cooling water in the cooling device (14) if the molten metal is completely filled in the molding part (11) of the mold mold (7);
Before the molten metal starts to be cooled by the cooling device 14 and completely solidified in the molding part 11 of the mold mold 7 by the forging mold 27 of the press device B, A fifth step (S5) of applying pressure to the molten metal in the forming part by lowering the molten metal to the inside of the inlet so that the remaining water in the molten metal, the pores and the bubbles due to the oil rise, and forming a solidified product outside the upper inlet of the forming part;
A sixth step of extracting and cutting the finished casting product from the forming part of the mold mold 7 when the casting product is finished and cutting the finished casting product on the basis of the cutting line when the extraction is completed, (S6). ≪ / RTI > The method according to claim 6, wherein in the first step (S1), the mold mold (7) is formed with a runner (12) at the entrance of the forming part (11) When the molten metal is injected, the molten metal is sequentially injected into the neighboring forming portion 11,
In the fifth step S5, the molten metal in the forming part 11 is subjected to liquid forging so that the remaining shrinkage holes in the molten metal rise to the outside of the upper part of the upper part of the forming part 11 to form a solidified product, To be a molten forging casting,
Wherein the molten metal in the forming part (11) is cast so that the solidified material due to the shrinkage cavity is deviated from the casting.

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