KR20040064818A - Parting agent sprayer for die casting - Google Patents

Abstract

PURPOSE: A releasing agent sprayer for die casting is provided to reduce cost of die casting articles and prevent environmental pollution by recycling excess releasing agent flown out from die casting machine and automatically supplementing shortage of the releasing agent, thereby substantially reducing consumption of the releasing agent. CONSTITUTION: The releasing agent sprayer for die casting comprises an up and down separating plate(141) slantly installed inside waste oil separation tank; a plurality of lower partitions(144) a lower part of which is contacted with an inner lower surface of the waste oil separation tank in a lower part of the up and down separating plate, and an upper part of which is spaced apart from the lower surface of the up and down separating plate in a certain distance; a plurality of upper partitions(144) a lower part of which is contacted with an upper surface of the up and down separating plate in an upper part of the up and down separating plate; upper and lower passageways alternately installed at left and right sides of a lower part of the upper and lower partitions to connect space between the upper and lower partitions; an ejection part on which a plurality of ejection holes are formed, in which outer cylinder surrounds ejection cylinder, and which is installed on an upper part of the up and down separating plate; a separation tank filter installed under the up and down separating plate; adsorption roller(110) and transfer blades(120) rotationally installed on an upper part of the upper partitions and the ejection part; a recovery tank(500) connected to the ejection part; a pressure container(700) equipped with releasing agent injection pipe(720) and compressed air supply pipe(730) and connected to the waste oil separation tank; a pressure container filter(740) installed in the pressure container and connected to the releasing agent injection pipe; a die casting machine(900) into which the releasing agent is injected from the pressure container through the pressure container filter and the releasing agent injection pipe; and a recovery pump(160) through which excess releasing agent recovered to the recovery tank is transferred to the ejection part, wherein waste oil(910) is separated from the excess releasing agent, the separated waste oil is transferred to the adsorption roller, the waste oil adsorbed into the adsorption roller is pressed, separated and discharged to discharge port, and releasing agent separated from the waste oil is transferred to the pressure container through high pressure pump(600).

Description

Release agent injector for die casting {PARTING AGENT SPRAYER FOR DIE CASTING}

The present invention relates to a releasing agent injector for spraying a mold release agent (離 型 劑) applied to the mold using compressed air in order to facilitate the separation of the molding and the mold during the die casting operation, to recover the excess release agent discharged after injection By reusing waste oil after refining process to separate and filter waste oil, it prevents waste of mold release agent and environmental pollution caused by release of mold release agent and waste oil. The natural loss caused by the automatic replenishment to increase the convenience and efficiency of work.

Die casting (DIE CASTING) is a type of casting method in which a molten metal is injected into a mold and molded to obtain a molded product having a dense structure and high precision.

In this die casting, the mold is a mold that is repeatedly used after removing the molding, and if the molding and the mold are not separated smoothly, the mold is not only defective but also causes a serious result of damaging the expensive mold itself. A mold release agent (PARTING AGENT) is applied to the mold surface in advance so that the molding and the mold can be separated smoothly.

Generally, the release agent is used by diluting a stock solution obtained by emulsifying a metal or resinous lubricating substance to a certain ratio in water, and spraying and applying it evenly using a sprayer on the mold surface. .

A part of the sprayed release agent is applied to a mold to form a film, and a part is discharged through a die casting machine. At this time, the spilled release agent is mixed with various foreign substances such as dust or lubricant on the surface of the die casting machine, making it impossible to reuse. Therefore, the entire situation is discarded.

Therefore, not only the amount of release agent injected is consumed, and the release agent is wasted, and the leaked release agent penetrates into the sewer or soil, causing serious problems such as water quality and soil contamination, and the hassle of continuously replenishing the consumption of the release agent injector. There was a feeling.

In particular, the spilled waste release agent must be discharged after purification treatment in a separate treatment facility or requested by a specialized treatment company, but this requires a huge cost, so many small die casting companies discharge the waste release agent as it is.

The present invention was devised in view of the above-described problems, and after the injection into the mold, the excess release agent leaked out by the die casting machine was recovered, and the waste oil introduced from the die casting machine was adsorbed, separated, filtered, and reused. The release agent was sensed through various sensors to automatically replenish the diluent, and even when diluting the release agent stock solution, the diluent was automatically diluted with the correct mixing ratio by using a mixing cylinder, an electric valve, and a liquid level sensor.

1 is a perspective view of the present invention.

Figure 2 is an excerpt perspective view of the waste oil separation tank and the pressure vessel of the present invention.

Figure 3 is a perspective view of part of the waste oil separation tank of the present invention.

Figure 4 is a detailed view of the mixing cylinder of the present invention.

5 is an exploded perspective view of the ejection part of the present invention.

Figure 6 is a perspective view of a part of the release agent storage tank of the present invention.

Figure 7 is a perspective view of the dilution tank and recovery tank extract of the present invention.

8 is a schematic view of the operation of the present invention.

<Code Description of Main Parts of Drawing>

100: waste oil separation tank 101: discharge port

110: adsorption roller 111: consolidation rod

112: spring 113: adjustment handle

114: roller drive motor 120: feed wing

121: chain 130: jet

131: outer cylinder 132: blowout cylinder

133: blowout hole 134: external piping connection

141: vertical separation plate 142: upper partition

143: upper passage 144: lower partition

145: lower passage 150: separation tank filter

160: recovery pump 199: separation tank liquid level sensor

200: mixed cylinder 210: cylinder drive motor

220: piston 230: connecting rod

231 adjustment hole 240 fixing member

241: regulator 250: T-shaped tube

251: suction check valve 252: injection check valve

300: release agent storage tank 310: transparent cover

320: suction pipe 400: dilution tank

410: water supply pipe 411: electric valve

420: injection tube 440: dilution tank pump

499: dilution tank liquid level sensor 500: recovery tank

599: recovery tank liquid level sensor 600: high pressure pump

700: pressure vessel 710: release agent supply pipe

720: release agent injection pipe 730: compressed air supply pipe

740: pressure vessel filter 749: pressure sensor

799: Pressure vessel liquid level sensor 900: Die casting machine

910 waste oil 999 control box

The detailed structure of the present invention will be described with reference to the accompanying drawings.

Figure 1 shows the overall configuration of the present invention, a pressure vessel 700 for spraying the release agent and a release agent storage tank 300 for storing the release agent stock solution, a dilution tank 400 for diluting the release agent, from the release agent storage tank 300 Waste oil separation tank 100 for separating and purifying waste oil 910 from the release agent recovered after the injection to the mixing cylinder 200, the die casting machine 900 to suck a predetermined amount of the release agent stock solution to the dilution tank 400 And various piping, pumps, motors, sensors and the like for connecting, driving and controlling these components.

The operating principle of the present invention, as shown in Figure 8, the release agent filled in the pressure vessel 700 by the pressure of the compressed air supplied to the compressed air supply pipe 730 to the die casting machine 900 through the release agent injection pipe (720) Among the sprayed and released mold release agents, the excess release agent discharged through the die casting machine 900 flows into the recovery tank 500, and the introduced release agent is a blowing unit built in the waste oil separation tank 100 by the recovery pump 160. To be pushed to 130.

Recovery tank 500 is typically installed by excavating the lower portion of the die-casting machine 900, the support member is installed on the recovery tank 500, and the die-casting machine 900 is mounted thereon.

The excess release agent pumped into the jetting unit 130 having the structure as shown in FIG. 5 is introduced into the jetting tube 132 through the external pipe connection part 134, and is discharged through the jetting hole 133 and then the outer cylinder 131. It will flow out on the inside.

The excess release agent introduced into the waste oil separation tank 100 through the ejection unit 130 is not a pure release agent but mixed with various waste oils 910 and impurities in the process of being discharged from the die casting machine 900 and recovered to the recovery tank 500. Since it is a mixture, a purification process for separating these waste oils (910) and impurities is required, and this purification process is performed through the waste oil separation tank (100).

Waste oil separation tank 100, as shown in Figures 2 to 3, a plurality of partitions are formed therein, the upper portion as a rectangular parallelepiped container provided with a suction roller 110, the transfer blade 120 and the discharge port 101. The waste oil 910 having a low specific gravity is raised by increasing the surplus release agent to be kept at a constant temperature by the partition wall, and the waste oil 910 which is layered on the upper portion is raised to the adsorption roller 110. After the adsorption, it is compressed and separated by the consolidation rod 111 to be discharged to the discharge port 101.

As shown in Figure 3, the inner space of the waste oil separation tank 100, the upper and lower separation plate 141 is installed obliquely, the lower end is in contact with the inner bottom surface of the waste oil separation tank 100, the upper end of the upper and lower separation plate 141 The plurality of lower partitions 144 and the lower end spaced apart from the surface by a predetermined distance are divided into a plurality of upper partitions 142 installed to contact the upper surface of the upper and lower separator 141, the upper partition 142 and the lower An upper passage 143 and a lower passage 145 are alternately formed at the left and right sides of the partition 144 to connect spaces between the partition walls.

In addition, the upper and lower separation plates 141 are installed so that the upper and lower ends are spaced apart from the inner surface of the waste oil separation tank 100 by a predetermined distance, so that the upper and lower spaces of the upper and lower separation plates 141 can be connected to each other. One ejection part 130 is installed on the upper end of the upper and lower separator plates 141 to form a flow path along the upper surface of the upper and lower separator plates 141 with excess release agent introduced through the ejection part 130. And flow to fill the waste oil separation tank (100).

As such, due to the structure of the waste oil separation tank 100 in which the internal space is divided, disturbance due to the ejection action of the ejection unit 130 is minimized in the process of filling the excess mold release agent in the waste oil separation tank 100, and the waste oil separation tank ( In the flow of the releasing agent in 100, the meandering flow path is formed along the upper passage 143 and the lower passage 145, so that it is possible to maintain a high temperature stability and release agent due to specific gravity difference. And the separation of the waste oil 910 is made smoothly.

In particular, the waste oil 910 not separated in the upper space of the upper and lower separation plates 141 is separated in the lower space as shown in FIG. 8 and rises along the lower slope of the upper and lower separation plates 141, resulting in the waste oil separation tank 100. Join the waste oil (910) layer formed on the top.

A suction roller 110 and a transfer blade 120 having axes parallel to each other are connected to the chain 121 at the upper partition 142 and the ejection portion 130 of the waste oil separation tank 100 by a roller driving motor 114. It is installed to rotate by.

As the transfer blade 120 rotates, the waste oil 910 layered on the waste oil separation tank 100 is transferred toward the adsorption roller 110, and the transferred waste oil 910 is adsorbed by the adsorption roller 110. Thereafter, by the pressing rod 111 installed to be in close contact with the adsorption roller 110, it is compressed and released to be discharged to the discharge port (101).

The surface of the adsorption roller 110 is made of a material having excellent adsorption power, such as a sponge, the consolidation rod 111 is connected to the spring 112 and the control handle 113 as shown in Figure 1 to 2 consolidation rod 111 The adsorption roller 110 was able to adjust the pressing force.

The release agent from which the waste oil 910 is separated by the above-described process is filtered through the separation tank filter 150 installed at the bottom of the waste oil separation tank 100. Thus, the release agent from which the waste oil 910 and impurities are removed is removed. It is pumped by the high pressure pump 600 is injected into the pressure vessel 700 through the release agent supply pipe 710.

The release agent injected into the pressure vessel 700 is sprayed on the die casting machine 900 again to be reused while repeating the process of recovery and purification as described above.

Release agent supplied to the pressure vessel 700 by installing a pressure vessel filter 740 formed by overlapping the adsorption cloth for adsorbing oil components in multiple layers in the pressure vessel 700 and connecting the release agent injection pipe 720 therein. By adsorbing the waste oil 910 that may be mixed in a small amount so that only a pure release agent is injected, the pressure inside the pressure vessel 700 for releasing agent injection is increased as the waste oil 910 is adsorbed to the pressure vessel filter 740. Since the rise, the pressure sensor 749 that can detect this was installed so that the time to replace the pressure vessel filter 740.

In addition, in the present invention, the release agent storage tank 300, the dilution tank 400, the mixing cylinder 200 and various sensors, etc. are installed to automatically replenish the release agent consumed in the die casting operation process or the circulation process of the release agent such as recovery and purification. I could do it.

The mixing cylinder 200 is provided with a branched suction check valve 251 and the injection check valve 252 through the T-shaped pipe 250 as shown in Figure 4, these suction check valve 251 and the injection check valve ( 252 is connected to the suction pipe 320 and the dilution tank 400 installed in the release agent storage tank 300, respectively.

Release agent storage tank 300, as shown in Figure 6, is provided with a transparent cover 310 at the top to easily check the remaining amount of the release agent, the dilution tank 400, as shown in Figure 7 the electric valve 411 and the water supply pipe ( 410 is installed to control the water supply as the electric valve 411 is opened and closed.

The piston 220 of the mixing cylinder 200 is connected to the cylinder driving motor 210 through the connecting rod 230 as shown in FIG. 4 to reciprocate as the cylinder driving motor 210 rotates, and the mixing cylinder ( The fixing member 240 is fixed to the fixing member 240 is formed in the line segment type 241 and the connecting rod 230 has a plurality of control holes 231 are formed to adjust the reciprocating distance of the piston 220. .

When the piston 220 is drawn as the cylinder drive motor 210 rotates, the suction check valve 251 is opened, the injection check valve 252 is closed, and the mixing cylinder 200 removes the release agent solution from the release agent storage tank 300. When the piston 220 is compressed, the suction check valve 251 is closed, the injection check valve 252 is opened, and the releasing agent raw material sucked by the mixing cylinder 200 is injected into the dilution tank 400.

In addition, when the electric valve 411 is opened while the water is supplied to the dilution tank 400 through the water supply pipe 410, the release agent stock solution is diluted.

By adjusting the number of revolutions of the cylinder drive motor 210 and the reciprocating distance of the piston 220 through the adjusting hole 241 and the adjusting hole 231, it is possible to inject the exact amount of the release agent stock solution, dilution in the dilution tank (400) The crude liquid level sensor 499 is installed to open and close the electric valve 411 according to the liquid level, so that an accurate amount of water can be supplied, thereby maintaining a constant mixing ratio of the releasing agent stock solution and water.

The liquid level sensor is installed in the waste oil separation tank 100, the recovery tank 500 and the pressure vessel 700 as well as the dilution tank 400, and is connected to the control box 999, the circulation process of the release agent in the present invention It will be controlled and the detailed structure and action are as follows.

The waste oil separation tank 100, the recovery tank 500, and the pressure vessel 700 are each provided with a separation tank liquid level sensor 199, a recovery tank liquid level sensor 599, and a pressure vessel liquid level sensor 799. All are connected to the control box 999, the control box 999 has a roller drive motor 114, recovery pump 160, cylinder drive motor 210, electric valve 411, dilution tank pump 440 and high pressure The pump 600 is connected to be controlled by the control box 999.

Looking at the specific control procedure of the control box 999, when the level of the release agent in the pressure vessel 700 is lowered by the injection of the release agent, the pressure vessel liquid level sensor 799 detects this and the high pressure pump 600 is operated accordingly to waste oil In the separation tank 100, the release agent is sent to the pressure vessel 700.

When the liquid level of the waste oil separation tank 100 is lowered, the separation tank liquid level sensor 199 detects this and the recovery pump 160 operates accordingly to press the release agent from the recovery tank 500 to the waste oil separation tank 100. When the liquid level of the waste oil separation tank 100 reaches a predetermined position, the separation tank liquid level sensor 199 detects this and accordingly, the roller driving motor 114 operates to operate the suction roller 110 and the transfer blade 120. By rotating, the waste oil 910 is adsorbed and separated.

When the liquid level of the recovery tank 500 is lowered, the recovery tank liquid level sensor 599 detects this and accordingly, the dilution tank pump 440 operates to pump the release agent from the dilution tank 400 to the recovery tank 500. When the liquid level of the dilution tank 400 is lowered, the dilution tank liquid level sensor 499 detects this, and accordingly, the electric valve 411 is opened to supply water to the dilution tank 400 through the water supply pipe 410. The cylinder drive motor 210 rotates a predetermined number of revolutions to inject the releasing agent stock solution sucked from the releasing agent storage tank 300 into the dilution tank 400.

The cycle of injection, recovery, refining, and replenishment of the release agent is automatically controlled by the control box 999 without a separate operation and is continuously performed.

As a result, the technical spirit of the present invention, the upper and lower separator 141 is inclined in the interior of the waste oil separation tank 100 in which the discharge port 101 is formed on one side of the upper side, and the upper and lower ends of the upper and lower separator 141 are The upper and lower spaces of the upper and lower separation plates 141 are spaced apart from the inner surface of the waste oil separation tank 100 by a predetermined distance, and a plurality of lower partitions 144 are disposed at the bottom of the upper and lower separation plates 141 at the bottom of the waste oil. The upper side of the separation tank 100 is in contact with the lower surface of the upper and lower separation plate 141 is installed in a state separated by a predetermined distance, the upper portion of the upper and lower separation plate 141, a plurality of upper partitions 142 is the lower end It is installed to contact the upper surface of the upper and lower separation plate 141, the upper passage 143 for connecting the space between the upper partition 142 is formed at the bottom of the upper partition 142, alternately formed on the left, right, Lower passages 145 connecting the spaces between the lower partitions 144 are alternately disposed at the left and right sides of the partition walls 144. Is formed, the upper and lower separation plate 141, the upper end of the plurality of ejection holes 133 is formed on the outer circumferential surface, except the outer pipe connecting portion 134, the lower portion of the upper and lower cylindrical blowout cylinder 132 is opened The cylindrical outer cylinder 131 is provided with a blowout portion 130 of the structure wrapped around, the separation tank filter 150 is provided on the lower portion of the upper and lower separator 141, the upper partition 142 and the blower 130 The upper portion is installed so that the suction roller 110 and the transfer blade 120 having a parallel axis to each other by the roller drive motor 114, the blower 130 is an external pipe connection 134 and the recovery pump 160 It is connected to the recovery tank 500, the waste oil separation tank 100 through the separation tank filter 150, the high-pressure pump 600 and the release agent supply pipe 710 release agent injection pipe 720 and compressed air supply pipe ( 730 is connected to the pressure vessel 700 is provided, the pressure vessel 700 is a pressure vessel filter 740 connected to the release agent injection pipe 720 The mold release agent is injected into the die casting machine 900 through the pressure vessel filter 740 and the release agent spraying tube 720 at the pressure of the compressed air supplied from the outside through the compressed air supply pipe 730. The excess release agent discharged from the die casting machine 900 is recovered to the recovery tank 500 and is pumped to the ejection unit 130 through the recovery pump 160, and into the waste oil separation tank 100 through the ejection unit 130. The excess release agent flowed in gradually through the upper passage 143 and the lower passage 145, and the mixed waste oil 910 is separated by an increase in specific gravity, and the separated waste oil 910 is adsorbed by the transfer blade 120. After being transported to the roller 110 and adsorbed by the adsorption roller 110, the press release and release by the consolidation rod 111 is discharged to the discharge port 101, the release agent separated from the waste oil 910, the high pressure pump 600 Through the pressure vessel 700 is characterized in that it is pumped to a pressure higher than the internal pressure As mold release agent for e-casting,

The waste oil separation tank 100, the pressure vessel 700, and the recovery tank 500 are each provided with a separation tank liquid level sensor 199, a pressure vessel liquid level sensor 799, and a recovery tank liquid level sensor 599. 420, the water supply pipe 410 to which the electric valve 411 is connected, and the dilution tank 400 in which the dilution tank liquid level sensor 499 is installed are connected and provided through the recovery tank 500 and the dilution tank pump 440. The mixing cylinder 200 installed by branching the suction check valve 251 and the injection check valve 252 through the mold pipe 250 is connected to the injection pipe 420 through the injection check valve 252 and is provided. A release agent storage tank 300 having a suction pipe 320 and a transparent cover 310 connected to the suction check valve 251 is provided, and the piston 220 of the mixing cylinder 200 is connected to a cylinder through a connecting rod 230. It is connected to the drive motor 210 and reciprocating as the cylinder drive motor 210 rotates, and a line segment is fixed to the fixing member 240 for fixing the mixing cylinder 200. A type adjustment port 241 is formed and a plurality of control holes 231 are formed in the connecting rod 230 is configured to adjust the reciprocating distance of the piston 220, the separation bath liquid level sensor (199), pressure Container liquid level sensor (799), recovery tank liquid level sensor (599), dilution tank liquid level sensor (499), roller drive motor 114, cylinder drive motor 210, recovery pump 160, dilution tank pump (440) and The control box 999 for controlling them is connected to the high pressure pump 600, and the control box 999 opens the electric valve 411 when the liquid level of the recovery tank 500 decreases, and rotates the cylinder drive motor 210 by a predetermined number of revolutions. After diluting the releasing agent in the dilution tank 400, the dilution releasing agent is pumped to the recovery tank 500 through the dilution tank pump 440, and the recovery pump 160 when the level of the waste oil separation tank 100 is lowered. It is operated to press the release agent from the recovery tank 500 to the ejecting unit 130, the high pressure pump 600 when the liquid level of the pressure vessel 700 is lowered waste oil separation tank (10) Release agent injection device for die casting, characterized in that the pressure-receiving agent from the 0) to the pressure vessel 700.

As described above, the present invention is a die casting mold release agent injection device for recovering, refining and reusing excess release agent spilled from a die casting machine after injection and automatically replenishing the shortage, thereby significantly reducing the amount of release agent consumed in die casting, thereby reducing die casting. Cost reduction of the product was made possible, and environmental pollution caused by the discharge of waste release agent and waste oil was prevented.

In addition, by automating the entire process of releasing, discharging, refining and replenishment of the release agent, the convenience and efficiency of the work can be increased.

Claims (2)

The upper and lower separation plates 141 are inclined inside the waste oil separation tank 100 in which the discharge port 101 is formed at one upper end thereof; Upper and lower ends of the upper and lower separation plates 141 are spaced apart from the inner surface of the waste oil separation tank 100 by a predetermined distance so that the upper and lower spaces of the upper and lower separation plates 141 can be connected; In the lower portion of the upper and lower separation plates 141, a plurality of lower partitions 144 are in contact with the lower surface of the inner side of the waste oil separation tank 100 and the upper part is installed at a predetermined distance from the lower surface of the upper and lower separation plates 141. ; A plurality of upper partitions 142 are installed at an upper portion of the upper and lower separator plates 141 such that lower ends thereof contact upper surfaces of the upper and lower separator plates 141; Upper passages 143 connecting the spaces between the upper partitions 142 at the lower end of the upper partition 142 are alternately formed at the left and the right; Lower passages 145 connecting the spaces between the lower partitions 144 at the lower end of the lower partition 144 are alternately formed at the left and the right; The upper and lower separation plate 141 has a plurality of blowout holes 133 are formed on the outer circumferential surface and the upper and lower cylindrical blowout cylinders 132 excluding the outer pipe connecting portion 134 have a cylindrical shape of which the lower part is open. An ejection unit 130 having a structure surrounded by the outer cylinder 131 is provided; Separation tank filter 150 is provided below the upper and lower separator 141; An upper portion of the upper partition 142 and the blower 130 is installed such that the suction roller 110 and the transfer blade 120 having the axes parallel to each other are rotated by the roller driving motor 114; The blower 130 is connected to the recovery tank 500 through the external pipe connection 134 and the recovery pump 160; The waste oil separation tank 100 is connected to the pressure vessel 700 provided with the release agent injection pipe 720 and the compressed air supply pipe 730 through the separation tank filter 150, the high pressure pump 600, and the release agent supply pipe 710. Become; The pressure vessel 700 has a pressure vessel filter 740 connected to the release agent injection pipe 720 is built in the pressure vessel filter 740 and the release powder at the pressure of the compressed air supplied from the outside through the compressed air supply pipe 730 Release agent is injected into the die-casting machine 900 through the yarn 720; After the injection, the excess release agent discharged from the die casting machine 900 is recovered to the recovery tank 500 and pumped to the ejection unit 130 through the recovery pump 160; The excess release agent introduced into the waste oil separation tank 100 through the spraying unit 130 flows slowly through the upper passage 143 and the lower passage 145 so that the mixed waste oil 910 rises with a specific gravity and is separated; The separated waste oil 910 is transferred to the adsorption roller 110 by the transfer blade 120, and is adsorbed by the adsorption roller 110, and then compressed and detached by the consolidation rod 111 to be discharged to the discharge port 101. Become; The mold release agent injection device for die casting, characterized in that the release agent separated from the waste oil (910) is pumped at a pressure higher than the pressure inside the pressure vessel (700) through a high-pressure pump (600). The waste oil separation tank (100), the pressure vessel (700) and the recovery tank (500) each have a separation tank liquid level sensor (199), a pressure vessel liquid level sensor (799), and a recovery tank liquid level sensor (599). Provided; The inlet pipe 420, the water supply pipe 410 to which the electric valve 411 is connected, and the dilution tank 400 in which the dilution tank liquid level sensor 499 is installed are connected through the recovery tank 500 and the dilution tank pump 440. Become; A mixing cylinder 200 in which the suction check valve 251 and the injection check valve 252 are branched through the T-shaped pipe 250 is connected to the injection pipe 420 through the injection check valve 252; A release agent storage tank 300 having a suction pipe 320 and a transparent cover 310 connected to the suction check valve 251 is provided; The piston 220 of the mixing cylinder 200 is connected to the cylinder drive motor 210 through the connecting rod 230 to reciprocate as the cylinder drive motor 210 rotates; The fixing member 240 for fixing the mixing cylinder 200 is formed with a line segment-shaped adjusting opening 241 and the connecting rod 230 is formed with a plurality of adjusting holes 231 to adjust the reciprocating distance of the piston 220 Is configured to be; The separation tank liquid level sensor (199), pressure vessel liquid level sensor (799), recovery tank liquid level sensor (599), dilution tank liquid level sensor (499), roller drive motor 114, cylinder drive motor 210, recovery pump ( 160, the dilution tank pump 440 and the high pressure pump 600 is connected to the control box 999 for controlling them; The control box 999 opens the electric valve 411 when the liquid level of the recovery tank 500 decreases, drives the cylinder drive motor 210 by a predetermined rotational speed, dilutes the release agent in the dilution tank 400, and then dilutes the diluted release agent. The pump is pumped to the recovery tank 500 through the dilution tank pump 440, and when the liquid level of the waste oil separation tank 100 is lowered, the recovery pump 160 is operated to pump the release agent from the recovery tank 500 to the ejecting part 130. , Pressure vessel (700) Release pressure injection device for die casting, characterized in that for operating the high pressure pump (600) when the liquid level is lowered, the release agent is pumped from the waste oil separation tank 100 to the pressure vessel (700).