JP2003010952A - Spray device for mold releasing agent of die casting machine and spraying method for mold releasing agent - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a spray device for a mold releasing agent of a die casting machine and a spray method for the mold releasing agent capable of carrying out economically and uniformly coating the mold releasing agent without deteriorating the environment in operation. SOLUTION: The spray device is composed of a shutter which opens/shuts an opening of a first spray device so as to be on the same level as that of the surface of a cavity part in order to temporarily partition the first spray device, disposed so as to make its opening face the cavity part formed between both molds from the cavity part, a nozzle which is disposed in a space between the spray device and the shutter to drop the mold releasing agent from the upper side, and a perforated plate which is placed between the shutter and the nozzle, and to which the dropped mold releasing agent is blasted being directed to the front by a blown-off air from a fan provided on the front side of the nozzle to serve for uniform dispersion and spray.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mold release agent spray device for a die casting machine in which a liquid mold release agent is atomized by air and sprayed on the inner surface of a mold, and is particularly suitable for use in a substantially closed place. The present invention relates to a mold releasing agent spray device for a die casting machine and a mold releasing agent spraying method, which are capable of continuously spraying a mold releasing agent.

[0002]

2. Description of the Related Art Generally, a mold release agent is applied to a mold in order to easily separate a product after forging or casting and a mold during forging or casting of an ingot. If the mold release agent is unevenly applied to the mold, the product may be damaged when the product is taken out, resulting in defects in the product.
Therefore, it is necessary to uniformly apply the release agent to the mold,
This can be easily solved by using a spray. Generally, since a mold release agent having a relatively high viscosity is used, a spray of a type in which a liquid and a gas are mixed and sprayed in a mist form is used. Particularly, a structure mainly composed of a cylinder and a piston is used. Is common.

[0003]

By the way, conventionally, in order to spray a mold release agent on the inner surface of a mold, a nozzle is inserted between the molds while the mold is fully opened. Therefore, it becomes difficult to bring the nozzle close to the inner surface of the mold,
For example, the release agent cannot be sufficiently sprayed on the shadowed portion such as the back surface of the core, uneven adhesion is likely to occur, and the consumption of the release agent increases, which is uneconomical. further,
A major problem is that the release agent scatters around during spraying, deteriorating the work environment. The present invention has been made by paying attention to the above-mentioned conventional problems, and a release agent spray for a die-casting machine that can apply the release agent economically and uniformly without deteriorating the environment during working. It is an object to provide a device and a method for spraying a release agent.

[0004]

In order to achieve the above object, in the first aspect of the present invention, the first part is provided so as to face the opening in the cavity formed between the two molds. A shutter that opens and closes the opening so as to be flush with the surface of the cavity for temporarily separating the spray device from the cavity, and a shutter provided above the spray device and the space above the shutter. The nozzle for dropping the release agent from the nozzle and the release agent dropped between the shutter and the nozzle are blown forward by the air blown from the fan provided in front of the nozzle, and are evenly distributed. It is composed of a perforated plate having a role of diffusion / spraying. Further, in the second invention based on the first invention, the first spray device is provided with a fan for high-speed rotation that adds kinetic energy to the release agent. In addition, in a third aspect of the invention, which is mainly based on the first aspect, a second aspect of accelerating the adhesion of a release agent diffused / sprayed on the surface of the cavity of the mold located on the side where the first spray device is disposed. The spray device was arranged in a mold spaced apart from the first spray device and facing the mold in which the first spray device was installed. In the fourth invention mainly based on the first invention, the discharge valve for discharging the gas staying in the space is connected to the space via a pipe. Furthermore, in the fifth invention,
After opening the first shutter of the first spray device provided in the movable mold, the fan is driven to make the release agent be in an atomized state with a large droplet diameter by the air blown, and then after passing through the perforated plate. The atomized and diffused release agent having a small droplet diameter is attached to the cavity portion, and at the same time, the release agent is sprayed toward the cavity portion from the gas-liquid mixed phase nozzle provided in the second spray device. .

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, a mold release agent spray device for a die casting machine and a mold release agent spray method according to the present invention will be described in detail with reference to the drawings.

[Embodiment 1] FIG. 1 is a sectional view showing an embodiment of a horizontal vertical vertical casting type die casting machine in which a spray device according to the present invention is arranged in a mold, and FIG. 2 is an enlarged sectional view of the spray device. 3 and 4 are enlarged perspective views of the main part.

In FIG. 1, the die casting machine is mainly composed of a die device 10 and a casting device 12. The mold device 10 includes a fixed mold 16 held by a fixed platen 14 and a movable mold 20 held by a movable platen 18. A column 24 is connected to the fixed platen 14 via a nut 22, and the movable platen 18 is movable along the column 24 in a direction toward and away from the fixed platen 14 by a toggle mechanism (not shown). Has been done.

A cavity portion 26, a runner portion 28, and a biscuit portion 30 are provided on the mating surface between the fixed die 16 and the movable die 20.
Is provided. The mold apparatus 10 is installed on the machine base 44, and the machine base 44 is installed so as to straddle a pit 48 recessed in the ground base 46.

The casting device 12 is installed in the pit 48. The casting device 12 has a structure in which an injection cylinder 50, a block 52, and a sleeve 54 are sequentially installed from the lower side. Injection cylinder 50 is pit 48
It is supported by a receiving seat 56 fixed to the bottom surface of the pin via a pin 58, and the upper end side of the pin 58 can be tilted with the pin 58 as the center of rotation. A piston 60 is installed in the injection cylinder 50, and a rod 6 extending upward is provided in the piston 60.
Two are connected.

A cylinder hole 64 extending vertically is provided in the block 52, and a docking ram 66 is inserted into the cylinder hole 64.
The lower end of is fixed to a flange 68 formed on the upper surface of the injection cylinder 50. The sleeve 54 is connected to the upper side of the block 52 via a connecting member 69, and the upper end of the sleeve 54 can be inserted into the lower end of the biscuit portion 30 of the mold device 10.

The plunger tip 7 is placed in the sleeve 54.
0 is installed slidably, and the plunger tip 7
The lower end of the plunger 72 holding 0 is connected to the upper end of the rod 62 via a coupling 73. A tilting cylinder 74 is pivotally supported by a side wall of the pit 48 via a seat 76 and a pin 78, and a rod 82 connected to a piston 80 of the tilting cylinder has a tip at a joint 84. It is pivotally attached to the side surface of the flange 68 of the injection cylinder 50 via a pin 86.

Next, the release agent spray device 90 of the die casting machine of the present invention will be described. The mold release agent spray device 90 of the die casting machine includes a first spray device 91 attached to the fixed mold 16 side and a second spray device 10 attached to the opposing movable mold 20 side of the fixed mold 16.
5 and. First, the main parts of the first spray device 91 are: a fan 92 for spraying air to a release agent for atomization and diffusion; a fan motor 93 for rotationally driving the fan 93; and a fan 92. And cavity 26
It is provided on the opposite side of the fan 93 of the first space portion 95 provided between and has a perforation 94a formed at a constant pitch inside the outer peripheral portion for spraying and diffusing the release agent. A perforated plate 94, a shutter 96 that is inserted between the cavity part 26 and the perforated plate 94 so as to be flush with the surface of the cavity part 26 and can be opened and closed, and between the perforated plate 94 and the fan 93. It is composed of a nozzle 98 located at an upper part and supplying a release agent downward, and a discharge valve 100 having a role of discharging gas accumulated in the first space 95.

Next, the main portion of the second spray device 105 is similar to the first spray device 91 in the cavity portion 26.
In order to shield between the nozzle 106 for spraying the release agent and
A second shutter 108 that is openably and closably arranged so that the outer end surface thereof is flush with the cavity portion 26, and a gas-liquid mixed-phase nozzle 106 that is arranged in the movable mold inner space for spraying the mold release agent. It consists of and.

First, the structure of the first spray device 91 will be described with reference to FIG. The fan 92 has a large number of rotating blades (five blades are used in the present embodiment) at equal intervals in the radial direction of the motor shaft portion 93a. When droplets of the release agent are intermittently dropped from the nozzle 98 for use into the first space portion 95, air from the fan 92 is blown onto the droplets to atomize and diffuse the droplets. Has become. A fan motor 93 is a drive source for rotating the fan 92.

The fan motor 93 is separated from the outer peripheral portion in the axial direction by a power air supply pipe 122a for driving the motor.
A power air exhaust pipe 122b for driving the motor is provided. Kinetic energy of compressed air introduced from the power air supply pipe 122a is radially arranged in a radial direction of the motor shaft portion 93a penetrating the fan motor 93 in the axial direction (not shown). ), The power blade is rotated. The compressed air jetted from the power air supply pipe 122a toward the power blades loses kinetic energy after the power blades rotate, and the compressed air discharge pipes 122
It is designed to be discharged from b.

Further, the fan motor 93 is a fixed mold 16
Since the molten metal such as high temperature aluminum or magnesium is poured into the cavity portion 26 for each shot, the fixed die 16 having a large heat capacity is provided. The amount of heat stored inside is received from the outer periphery of the fan motor 93. In order to prevent the temperature of the fan motor 93 from becoming high and causing a failure, the mold space 9 of the fan motor 93 is prevented.
A cooling pipe (not shown) for the fan motor 93 is arranged along the peripheral wall of the fan motor 5. This cooling pipe is formed by bending one pipe so as to be used as a heat exchanger, and cooling water can pass through the inside. A cooling supply pipe 120a for the fan motor 93 is disposed at one end of the pipe, and is introduced from the cooling supply pipe 120a at the other end to cool the first space 95,
A cooling discharge pipe 120b for the fan motor 93 for discharging the cooling water is provided.

A perforated plate 94 is disposed on the side of the cavity 26 facing the fan 92 in the first space 95 so as to be engageable with the wall surface of the first space 95. The perforated plate 94
Is connected to a hydraulic cylinder (not shown) and can be opened and closed by supplying and discharging pressurized oil to and from the hydraulic cylinder. Normally, the perforated plate 94 is used in a state where the perforated plate 94 is advanced and the tip portion of the perforated plate 94 is engaged with the wall surface of the first space portion 95. Pores 94a are formed at regular intervals on a pitch circle having a constant radius from the center of the perforated plate 94. The perforated plate 94 is completely atomized when the release agent dropped from the nozzle 98 and atomized and diffused to some extent by the fan 92 passes through the perforations 94a of the perforated plate 94, and then the cavity portion 26 is formed. Is to be sprayed on the surface of. When the mold release agent passes through the pores 94a, the linear velocity of the gas containing the mold release agent increases, and after passing through the pores 94a, the mold release agent also diffuses and is atomized due to the diffusion of the gas. It becomes a state.

The first shutter 96 is disposed between the perforated plate 94 and the cavity portion 26, and the outer surface of the shutter 96 on the side of the cavity portion 26 and the surface of the cavity portion 26 are flush with each other. In addition, the tip portion of the first shutter 96 is arranged so as to be engageable with the wall surface of the first space portion 95. The first shutter 96 is connected to a hydraulic cylinder (not shown), and is arranged to be openable and closable by supplying and discharging pressurized oil to and from the hydraulic cylinder. The hydraulic pressure of the hydraulic cylinder is such that the shutter 96 is not opened due to the pressure of the molten metal supplied to the cavity portion 26.

Further, there is provided a release agent spraying nozzle 98 located above the first space 95 between the perforated plate 94 and the fan 93 and for dropping a predetermined amount of the release agent. The tip of the nozzle 98 is arranged so as to be positioned above and forward of the fan 92, and rotationally drives the fan 92 to be influenced by the air blown from the fan 92 and the nozzle 98.
The release agent intermittently dropped from is provided at a position where it is atomized and diffused when passing through the porous plate 94. A releasing agent supply pipe 130 is connected to the nozzle 98 so that the releasing agent can be supplied from a supply source. Further, by supplying the release agent directly from the supply source in the middle of the release agent supply pipe 130, it is possible to prevent the variation of the amount of the release agent to be dropped due to the influence of the pressure during the feeding. Thus, the release agent buffer tank 99 is connected.

Further, in order to properly and smoothly discharge the air in the space 95, the tip of the gas discharge pipe 132 is slightly projected into the first space 95, and the gas discharge pipe is separated from the tip. A solenoid valve type discharge valve 10 is provided above 132.
0 is connected. The solenoid valve type discharge valve 100 can stop and discharge the air in the first space 95 by excitation or demagnetization. On the other hand, a second spray device 105 provided in the movable mold 20 is provided on a diagonal line opposite to the first spray device 91 provided in the fixed mold 16 through the cavity portion 26. There is.

The second spray device 105 includes a pair of gas-liquid mixed-type nozzles 106 vertically spaced apart from each other in the second space 107, the cavity 26 and the second spray device 105. The second shutter 108 has a role of partitioning the space between the two spaces 107. The gas-liquid mixed phase nozzle 106 uses a mold release agent in a liquid phase and heated or compressed air at room temperature to atomize the mold release agent. After the release agent is cut in a circular slice with the energy of air and atomized,
It is designed to be discharged to the outside of the nozzle 106.

The second shutter 108 is disposed between the second space 107 and the cavity portion 26, and the outer surface of the second shutter 108 on the side of the cavity portion 26 and the cavity portion 26. It is disposed so as to be engageable with the wall surface of the second space portion 107 so that the surface thereof is flush. The second shutter 108 is connected to a hydraulic cylinder (not shown) and is arranged to be openable and closable by supplying and discharging hydraulic pressure to and from the hydraulic cylinder. The hydraulic pressure of the hydraulic cylinder depends on the pressure of the molten metal supplied to the cavity portion 26,
The pressure is such that the shutter 108 is not opened.

Further, the purpose of installing the second spray device 105 is to bake it when the mold release agent is sprayed by using the first spray device 91 and the mold release agent is not uniformly attached to the entire inside of the cavity portion 26. In order to prevent the above problem from being caused, the first spray device 91 is arranged to assist the spraying of a portion which is difficult to be sprayed. In this case, the first spray device 91 and the second spray device 10
The mold release agent sprayed in the mold closed state is the cavity portion 26.
It is necessary to separate them at positions where they do not overlap and are economically small.

The operation of the release agent spray device of the die casting machine thus constructed will be described below.

First, the movable mold 20 is fixed to the fixed mold 14.
Are gradually brought close to each other and abutted on the fixed mold 14 and the movable mold 20, and then the mold is clamped by a mold clamping device (not shown).
Subsequent to the mold clamping, hydraulic oil is introduced into the hydraulic cylinders respectively engaged with the first shutter 96 and the perforated plate 94 of the first spray device 91 to move the first shutter 96 and the perforated plate 94 into the first space portion. The wall surface of 95 is brought into contact with and pressed into a closed state. The second spray device 105 also introduces hydraulic oil into the hydraulic cylinder that is engaged with the second shutter 108 in the same manner as the first spray device 91, and causes the second shutter 108 to move to the second shutter 108.
The closed state is brought into contact with and pressed against the wall surface of the space 107.

In the state where the first shutter 96 is closed, compressed air is jetted from the power air supply pipe 122a toward the power blade, and the power blade (which is axially attached in the radial direction of the motor shaft 93a) ( (Not shown) about 20,0
Rotate at a speed of 00 RPM. The rotation speed of the power blade is determined by the pressure of compressed air. The fan 92 also rotates at a high speed due to the high-speed rotation of the motor shaft 93a, and air is sent to the front direction of the fan 92, but even if the air is sent, the first shutter 96 is in the closed state, so that the fan is continuously sent. The supplied air is discharged to the outside from the gas discharge pipe 132.

Next, in the first spray device 91, hydraulic oil is introduced into the hydraulic cylinder of the first shutter 96, the first shutter 96 is retracted to the backward limit, and the perforated plate 94 is stopped at the forward limit position while the first plate is stopped. 1 The front of the space 95 is opened. Similarly, the second spray device 105 also introduces hydraulic oil into the hydraulic cylinder engaged with the second shutter 108, retracts the second shutter 108 to the backward limit, and opens the front of the second space 107. .

In this state, first, the release agent supply pipe 130
When a small amount (for example, 0.1 cc / sec) of the release agent supplied from the nozzle is intermittently dropped, the release agent is permeated by the air sent from the fan 92 and the porous plate 94 is perforated. When passing through 94a, it is atomized and the average particle diameter becomes about 1 μm. The fine mist-like release agent adheres to the surface of the cavity 26. However, the distribution of adhesion of the release agent to the surface of the cavity portion 26 is the largest in the vicinity of the first shutter 96 of the first spray device 91, and tends to be gradually diluted as the distance from the first shutter 96 increases. found.

In order to solve such a problem, as a first method, the second spray device 105 for promoting the adhesion of the release agent diffused / sprayed on the surface of the cavity 26.
A fixed mold 16 on which the first spray device 91 is installed.
By disposing the movable mold 16 away from and facing each other, spraying from the nozzle 98 of the first spray device 91 can be performed.
The diffused release agent is replenished by the release agent sprayed and diffused from the second spray device 105 through the gas-liquid mixed phase nozzle 106 to prevent uneven adhesion. In this case, in order to prevent uneven adhesion of the release agent sprayed and diffused from the nozzle 98 of the first spray device 91,
By arranging the gas-liquid mixed phase type nozzles 106 of the second spray device 105 so as to be vertically separated from each other, the pair of gas-liquid mixed phase type nozzles 106 can secure their respective release agent spray areas as much as possible. Over-spraying can be prevented.

Further, as a second method, the fixed mold 16
As shown in FIG. 5, the mold release agent is supplied from the nozzle 98 in a state in which the space between the movable mold 20 and the movable mold 20 is slightly opened, and atomized through the porous plate 94 so as to be applied to the surface of the cavity portion 26. Since both molds are in a slightly opened state, the atomized mold release agent will be scattered outside the mold, but it will be easily diffused throughout the cavity portion 26, and the mold release agent will be released. It becomes easy to adhere to the entire surface of the portion 26. In the present invention, the first spray device 91 and the second spray device 10 are arranged so that the release agent is uniformly attached to the surface of the cavity portion 26.
The molds 5 are arranged in diagonally opposite molds, and both molds are slightly opened as necessary, so that the mold release agent is surely and uniformly attached to the surface of the cavity portion 26.

As described above, the first spray device 91
Then, the mold release agent is sprayed from the second spray device 105 to complete the application to the surface of the cavity portion 26. Next, the operation of the casting device 12 is performed in parallel with the series of operations. That is, the block 52 descends by releasing the hydraulic oil supplied into the cylinder hole 64, and the block 52 is seated on the cylinder 50. Further, by releasing the hydraulic oil supplied to the head end side of the injection cylinder 50, the piston 60 is lowered to the lower limit, and the plunger tip 70 is also lowered to the lower limit. When the rod 82 of the tilt cylinder 74 is projected in this state, the pouring device 12 tilts as a whole. Therefore, the molten aluminum is poured into the sleeve 54.

After that, the rod 82 of the tilting cylinder 74
And the casting device 12 is set in the vertical posture. Next, hydraulic oil is introduced into the cylinder hole 64 of the block 52 to cause the docking ram 66 to project. This makes block 5
2, the sleeve 54 is inserted into the biscuit portion 30 of the mold device 10. Therefore, hydraulic oil is introduced into the head-end side chamber of the injection cylinder 50 to push up the piston 60. As a result, the plunger tip 70 rises, and the molten aluminum stored in the sleeve 54 is introduced into the cavity 26 via the biscuit portion 30 and the runner portion 28.

When cooling water is passed through the molds to cool both molds to a desired temperature, the movable mold 20 is opened to open both molds after the solidification of the molten metal in the cavity 26 is completed. Retreat. When taking out the product, first, the movable mold 20 is retracted to open the mold, and the product is extruded by a product extruding device (not shown) provided in the movable mold 20.

[Embodiment 2] FIG. 1 is a sectional view showing an embodiment of a horizontal die-clamping horizontal casting die casting machine in which a spray device according to the present invention is arranged in a die. FIG. 4 is a cross-sectional view showing an embodiment of a horizontal die-clamping horizontal casting die casting machine in which a spray device is arranged in a die. In a state where the movable die and the fixed die are closed, The state which sprays a mold agent from a 1st spray apparatus and a 2nd spray apparatus is shown. Further, FIG. 5 shows a case where both molds are slightly opened from the state of FIG.

The present invention will be described with reference to FIGS. 4 and 5, but the descriptions of the same contents as the structures shown in FIGS. 1 to 3 will be cited, and only the new structure and its function will be described. . In FIG. 4, reference numeral 140 is a horizontal casting type injection sleeve 140, and the molten metal is supplied from the hot water supply port 141. Further, reference numeral 142 is an injection plunger, which has a function of pushing the molten metal supplied from the hot water supply port 141 into the injection sleeve 140 into the cavity portion 26.

After the molds are closed, a predetermined amount of the release agent is sprayed from each of the first spray device 91 and the second spray device 105, and uniformly adheres to the surface of the cavity 26. Next, when a predetermined amount of molten metal is supplied from the hot water supply port 141 of the injection sleeve 140, the injection plunger 142 moves forward to cast the molten metal into the cavity portion 26. The molten metal that has been cast is cooled in the cavity 26,
It is taken out by the same method as described in FIG. Note that FIG. 5 discloses a case where the fixed mold 16 and the movable mold 20 are slightly opened by a distance S. However, by slightly opening both molds, the release agent is released. Although it is scattered a little outside the mold, it can be reliably attached.

As described above, according to the present invention, by arranging the first spray device and the second spray device so as to face each other on a diagonal line, the cavity portion of the release agent sprayed toward the surface of the cavity portion. It is possible to economically atomize because it is possible to prevent the double adhesion to and to evenly adhere. In addition, by performing the same spraying with the mold slightly opened, uniform and economical adhesion can be easily performed. Further, compared with the conventional case where the release agent is sprayed from the mold open state, the cycle time of the product is significantly shortened and the production efficiency is significantly improved.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an embodiment of a horizontal vertical vertical casting die casting machine in which a spray device according to the present invention is arranged in a mold.

FIG. 2 is an enlarged sectional view of the spray device according to the present invention.

FIG. 3 is an enlarged perspective view of a main part of the spray device.

FIG. 4 is a cross-sectional view showing an embodiment of a horizontal die clamping horizontal casting die casting machine in which the spray device according to the present invention is arranged in a die.

FIG. 5 is another embodiment of FIG. 4 according to the present invention.

[Explanation of symbols]

10 Mold equipment 14 Fixed board 16 Fixed mold 18 movable plate 20 movable mold 22 nuts 24 columns 26 Cavity 28 Runner section 30 biscuit part 44 machine base 50 injection cylinders 52 blocks 54 sleeve 60 pistons 74 Tilt cylinder 90 Release agent spray device 91 First spray device 92 fans 93 fan motor 94 Perforated plate 94a porous 95 First Space Section 96 First shutter 98 nozzles 99 Release agent buffer tank 100 electromagnetic discharge valve 105 Second spray device 106 Solid-liquid mixed phase nozzle 107 Second Space Section 108 second shutter belt 120a Fan motor cooling supply pipe 120b Fan motor cooling exhaust pipe 122a Motor Air Supply Pipe for Driving Air 122b Motor air drive exhaust pipe 124 Release agent spraying gas 126 Release agent supply pipe 132 gas exhaust pipe 140 injection sleeve 141 hot water supply port 142 injection plunger

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) B05D 7/24 301 B05D 7/24 301Z B22C 3/00 B22C 3/00 H 23/02 23/02 DF Terms (reference) 4D075 AA01 AA06 AA22 AA78 AC11 BB57X CA07 DA29 DB01 DC15 4E094 CC55 4F033 QA01 QB02Y QB03X QB12Y QB18 QD03 QD14 QE14 4F042 AA13 AB00 CB24 DD31 DD37 EA02

Claims (5)

[Claims] 1. A first spray device, which is disposed so as to face an opening in a cavity formed between both molds, is flush with the surface of the cavity so as to temporarily separate the first spray device from the cavity. A shutter for opening and closing the opening, a nozzle disposed in a space between the spray device and the shutter for dropping a release agent from above, and a nozzle between the shutter and the nozzle. A die-casting machine, characterized in that the release agent is blown forward by air blown from a fan provided in front of the nozzle, and is composed of a perforated plate having a function of uniform diffusion / spraying. Release agent spray device. 2. The mold release agent spray device for a die casting machine according to claim 1, wherein the first spray device is provided with a fan for high speed rotation for adding kinetic energy to the mold release agent. 3. A second spray device for promoting adhesion of a release agent diffused and sprayed onto the surface of a cavity of a mold located on the side where the first spray device is disposed, is separated from the first spray device. The mold release agent spray device of the die casting machine according to claim 1, wherein the mold spray agent is disposed on the side of the mold facing the mold on which the first spray device is installed. 4. A mold release agent spray device for a die casting machine according to claim 1, wherein an exhaust valve for exhausting gas accumulated in the space is connected to the space via a pipe. 5. After releasing the first shutter of the first spray device provided in the movable mold, the fan is driven to blow air to blow the release agent into an atomized state having a large droplet diameter,
Next, after passing through the perforated plate, the atomized / diffused release agent having a small droplet diameter is attached to the cavity portion, and at the same time, the second
A mold release agent spraying method for a die casting machine, characterized in that a mold release agent is sprayed toward a cavity portion from a gas-liquid mixed phase nozzle provided in a spray device.