KR20100018944A - Gas generator for manufacturing core and gas supply system comprising the same - Google Patents

Abstract

PURPOSE: A gas generator for manufacturing core and gas supply system is provided to prevent a pump unit from continually operating for long term by arranging a sub tank including a device detecting the liquid level and to prevent evaporation of the liquefied amine gas according to generation of heat. CONSTITUTION: A gas generator for manufacturing core comprises: a lead-in piping(340) in which liquefied amine gas is injected; a main tube(320) connected with the lead-in piping; a main piston(330) which touches in the inner wall of the main tube and form the main tube and internal space; a assistant tube(360) with the internal space connected to the main tube; a micro control apparatus(370) controlling the internal space of the assistant tube; a reciprocating cylinder(310) which is connected to the main piston and is capable of driving up and down; and an apparatus for supplying proper quantity composed of an outlet piping(350) connected to the main tube.

Description

Gas generator for manufacturing core and gas supply device including same

The present invention relates to a gas generator for producing a core and a gas supply device including the same, and more particularly, to mixing a sand and a resin mixed in manufacturing a core forming a hollow part of a casting. In the gas supply device for supplying amine gas to harden sand, the core is manufactured to improve productivity and working environment by implementing quantification of expensive and harmful amine gas according to the working situation. The present invention relates to a gas generator for use and a gas supply device including the gas generator.

In order to manufacture castings of various types of structures required for assembling the body of a vehicle, a core for forming the hollow part of the casting is required. The core is manufactured by injecting a mixing sand mixed with sand and resin into a mold, supplying the amine gas to the injected kneading yarn, curing it, and then passing clean air through the remaining amine gas. The process of discharging the core to discharge the finished product.

The core forming system performing the above process comprises a gas generator for introducing amine gas and air and a gas supply device including the same. 1 shows a gas supply device comprising a gas generator according to the prior art of such a core forming system.

As shown in FIG. 1, the conventional gas supply device 1 includes a main tank 20, a pump unit 30, and a gas generator 10 for introducing gas into the main tank 20. The liquefied amine gas is moved to the gas generator 10 by operating the pump unit 30, and the vaporized amine gas is introduced into each process through the gas generator.

As shown in FIG. 1, the gas generator 10 includes a shuttle valve 15, a flow control valve 16, and a guide regulator configured to control the supply of amine gas or air. the amine gas pressure regulator 11, the amine gas three-way solenoid valve 12 and the purge pressure regulator 13 and the purge three-way solenoid valve 14 connected to the central structure of the pilot OP regulator 17, respectively. By controlling the supply of amine gas and air, respectively, the opening time is controlled by a timer of a 3-way diverter valve 18 connected to the needle valve 19 of the main tank side. The dosage is made to control.

The gas supply device having such a configuration is configured such that a plurality of gas generators are connected to one pump unit, and forms a closed circuit in which surplus gas supplied through the pump unit can sufficiently flow between the pump unit and each gas generator, The pump unit was configured to always run.

Accordingly, in the case of using the gas generator according to the prior art, a plurality of gas generators are connected to one pump unit, which causes a problem that the pressure decreases during simultaneous operation of each gas generator, resulting in a problem that the input amount is uneven. there was.

In connection with the nonuniformity of the amine gas input amount, a large amount of defects occur due to the incomplete shape of the core when the amine gas is insufficiently injected, and the problem of deterioration of the working environment due to the large amount of harmful amine gas emitted during the over-injection. And the problem of increased production costs.

In addition, there is a problem in that the self-heating occurs as the pump unit is operated for a long time, the liquefied amine gas vaporizes during the flow process, the liquefied amine gas that flows as the pump unit and each facility is located at a very far distance There was a problem that bubbles are generated.

In addition, since the operation is performed according to the initially set amount without a separate state check function, it is not possible to perform a flexible operation according to the environmental change or the state of the mold and the lake, there is a problem that lacks the reliability of the operation.

Accordingly, in the present invention, in the gas generator for core manufacturing for vaporizing the liquefied amine gas and injecting it into the equipment in each process, the pump unit is prevented from operating continuously by including an auxiliary tank including a liquid level measuring device. A gas generator for core fabrication that limits the elimination of previously generated bubbles and additional bubble generation through another auxiliary tank and includes a quantitative supply device to enable quantitative control of the amine gas supplied to the facilities in each process. In addition to providing a gas supply apparatus including the gas generator for producing the core.

In order to achieve the above object, the present invention provides the following configuration.

In the gas generator for core fabrication, the inlet-side piping into which liquefied amine gas is injected, the main tube connected to the inlet-side piping, and the inner wall of the main tube are in contact with each other to form a predetermined internal space with the main tube. A main piston, an auxiliary tube having a predetermined internal space connected to the main tube, a fine adjusting device for adjusting a predetermined internal space of the auxiliary tube, a reciprocating cylinder connected to the main piston to be driven up and down, Provided is a gas generator for core fabrication, comprising a quantitative supply device comprising a discharge pipe connected to a main tube, capable of quantitative supply of liquefied amine gas.

The present invention also provides a gas generator for core fabrication, further comprising a first auxiliary tank including a liquid level measuring device.

In addition, the second auxiliary tank for temporarily storing the liquefied amine gas passing through the first auxiliary tank further provides a gas generator for producing a core.

Here, the fine adjustment device includes a fine adjustment motor, a rack and pinion connected to the fine adjustment motor, a fine adjustment piston connected to the pinion to adjust the volume of the auxiliary tube according to the vertical movement, and the fine adjustment motor. A gas generator for core fabrication, comprising a positioning encoder for controlling the driving stop of the core.

In this case, the fine adjustment device provides a gas generator for core manufacturing, further comprising a control panel capable of controlling the fine adjustment motor and the positioning encoder by an electrical signal.

The present invention also provides a gas generator for core fabrication, further comprising an exhaust line for the main tube and the auxiliary tube, and an exhaust line for the first auxiliary tank and the second auxiliary tank.

The liquid level measuring device of the first auxiliary tank measures whether the lower limit and the upper limit of the liquid level of the liquefied amine gas in the first auxiliary tank are reached, and at the upper limit, the pump unit of the main tank connected to the gas generator is stopped. In the lower limit, there is provided a gas generator for core fabrication, wherein the operation of the pump unit is resumed.

Here, according to whether or not the operation of the pump unit according to the liquid level measurement of the first auxiliary tank, for manufacturing the core further comprises a blocking solenoid valve for opening and closing the pipe line connected to the main tank and the pump unit at the same time Provide a gas generator.

In addition, the lower portion of the metering device provides a gas generator for producing a core further comprises a leak line for recovering the leakage of the liquid amine gas between the main tube and the main piston.

In addition, the present invention provides a gas supply apparatus including a gas generator for core fabrication, the main tank in which the liquefied amine gas is stored, the pump unit for pumping the liquefied amine gas in the main tank, and the amine gas are supplied to the core fabrication facility. A gas supply device including a gas generator for core fabrication, comprising a gas generator for supplying a gas and a closed circuit for liquefied amine gas transfer consisting of a supply pipe connecting the gas generator and the main tank and a return pipe, wherein the gas generator is a liquid level measuring device. A first auxiliary tank including a second auxiliary tank configured to temporarily store the liquefied amine gas passed through the first auxiliary tank, an inlet side pipe into which the liquefied amine gas is introduced, and a main tube connected to the inlet side pipe, and the main A main that contacts the inner wall of the tube and forms a predetermined internal space with the main tube An auxiliary tube having a piston, a predetermined inner space connected to the main tube, a fine adjustment device for adjusting a predetermined inner space of the auxiliary tube, a reciprocating cylinder connected to the main piston to be driven up and down, and the main tube A gas supply device including a gas generator for core fabrication, characterized in that the gas generator comprises a fixed quantity supply device comprising a discharge side pipe connected to the gas generator.

As described above, the core generator gas generator and the gas supply device including the same according to the present invention have the following effects.

First, by arranging an auxiliary tank including a liquid level measuring device to prevent the pump unit from continuously operating for a long time, it is possible to prevent the vaporization of the liquefied amine gas due to heat generation.

Second, it is possible to remove the air bubbles already generated in the process of adding the liquefied amine gas, and to prevent bubbles that may additionally occur due to the swelling of the liquid phase in the process of adding the liquefied amine gas.

Third, the quantitative supply device that can adjust the amount of liquefied amine gas introduced according to the model and mold condition enables the supply of quantified amine gas according to the mold state, thereby enabling efficient management of the process.

Fourth, as a configuration to cut off the piping line between the pump unit and the amine gas, unlike the conventional method, even when operating as a single pump unit, by adopting the gravity injection method in each gas generator, liquefied amine gas input amount The nonuniformity of the product can be eliminated, thereby reducing the defective rate of the product and improving the production cost.

In the present invention for achieving the above object, in the gas generator for producing the core and the gas supply device including the same, the first auxiliary tank and the first auxiliary tank including the liquid level measuring device connected to the pipe connected to the main tank and the pump unit A second auxiliary tank in which the liquefied amine gas is temporarily stored and a quantitative supply device for supplying the liquefied amine gas quantified according to the movement of the cylinder disposed under the second auxiliary tank to remove bubbles and prevent vaporization The present invention provides a gas generator for producing a core and a gas supply apparatus including the same, which enable supply of quantitative amine gas.

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

Figure 2 shows a preferred embodiment of a gas supply apparatus including a gas generator for producing a core of the present invention.

As shown in FIG. 2, the gas supply apparatus including the gas generator for core fabrication includes a main tank 110 for storing liquefied amine gas, a pump unit 120 for supplying gas, bubble stabilization, and operation of the pump unit. Liquefied amine that passed through the first auxiliary tank 140, the second auxiliary tank 150 for bubble stabilization, the first auxiliary tank 140 and the second auxiliary tank 150 can be induced to control the on / off It is configured to include a quantitative supply device 300 that can be adjusted to quantitatively inject gas, and pipes connecting the respective components.

In this case, as illustrated in FIG. 2, the main tank 110 and the pump unit 120 include a supply pipe 121 connecting the gas generator 200, and the liquefied amine gas through the supply pipe 121. Excess supply, the excess amine is configured to be connected back to the main tank 110 from the supply solenoid valve 130 and the shut-off solenoid valve 130 for closing the gas generator 200 by limiting the additional gas supply It is to configure a closed circuit 220 for liquefied amine gas transfer including a return pipe 122 that can be returned to the main tank 110 without the gas discharged.

Hereinafter, referring to the operation of the embodiment of the present invention having the same configuration as described above, the pump unit 120 is operated according to the operation command of the entire system, and the blocking solenoid valve 130 is opened to liquefied amine gas. When the gas is introduced into the gas generator 200, the liquefied amine gas drawn is configured to be temporarily stored in the first auxiliary tank 140, the first auxiliary tank 140 is the liquid level of the liquefied amine gas filled in the tank It is configured to include a liquid level measuring device (141, 142) capable of measuring. The liquid level measuring devices 141 and 142 are configured to measure and set a predetermined upper and lower limit values for the liquid level in the tank, and stop the operation of the pump unit 120 when the upper limit of the liquid level is reached. The shutoff solenoid valve 130 is closed to stop the supply of additional liquefied amine gas, and when the lower limit of the liquid level is reached, the operation of the pump unit 120 is resumed and the shutoff solenoid valve 130 is opened. And liquefied amine gas can be supplied again. Therefore, the operation of the pump unit 120 can be adjusted according to the liquid level measured in the first auxiliary tank 140, thereby reducing the amount of air bubbles generated during pumping.

In addition, preferably, the first auxiliary tank 140 is configured so that the liquefied amine gas is temporarily stored by appropriately adjusting the supplied flow rate and the discharged flow rate, thereby stabilizing the liquefied amine gas in the temporary storage process to pump and flow Bubbles generated in the liquid phase can be removed.

The first auxiliary tank 140 is connected to the pipe for transferring the liquefied amine gas by gravity to the lower portion, the pipe is connected to the second auxiliary tank 150.

As in the first auxiliary tank 140, the second auxiliary tank 150 temporarily stores and stabilizes the transferred liquefied amine gas, thereby removing bubbles not removed in the process of passing through the first auxiliary tank 140. It is arranged to have a relatively low potential energy compared to the first auxiliary tank 140 to prevent the swelling of the liquid phase by the feeding of the liquefied amine gas is configured to suppress the generation of bubbles to the maximum. In addition, the second auxiliary tank 150 is formed to have a smaller volume than the first auxiliary tank 140 so that the liquid level is always filled, and each auxiliary tank is connected to an air vent (vent: 143, 151). It is preferable to remove the bubbles generated by the formation, and to facilitate the flow of the liquefied amine gas.

The liquefied amine gas that has passed through the second auxiliary tank 150 controls the metering dose valve 160 with respect to a set value designated by the operator by a mold lake according to the model and mold state of the vehicle, and then through the metering supply device 300. It is configured to supply the amount of liquefied amine gas quantified according to a predetermined input amount set in advance according to the model and mold state of each vehicle. In this case, a leakage line 170 may be installed to collect the leaked liquefied amine gas to the main tank 110 in preparation for incomplete sealing or deterioration of the internal piston of the metered feeder 300. It is preferable to configure it to recycle. A detailed configuration of the metering supply device 300 will be described later with reference to the accompanying drawings.

The liquefied amine gas that has passed through the metering supply device 300 is transferred to the venturi tube 180 and supplied to each facility in the state of the amine gas vaporized by contact with the hot air moving through the venturi tube 180. do.

In the above configuration, the first auxiliary tank 140, the second auxiliary tank 150, the metering supply device 300, the venturi tube 180 between the valve so as to manually control the supply of liquefied amine gas to each (144, 152, 171, 172) can be installed so as to control the flow of the liquid artificially during repair or in emergency.

Figure 3 schematically shows the overall configuration of a gas supply device including the gas generator 200 for producing a core of the present invention.

As shown in FIG. 3, the gas supply apparatus including the gas generator 200 for core fabrication according to the present invention, similarly to the conventional art, has one gas unit for one pump unit 120 and the main tank 110. The generator 200 is connected, and this connection is a closed circuit 220 for liquefied amine gas transfer consisting of a supply pipe 121 from the main tank 110 of the liquefied amine gas and a return pipe 122 to the main tank 110. It is composed. In addition, each of the gas generators 200 is configured to be connected to a reservoir tank 210 in which air is stored to supply air.

4 is a cross-sectional view showing a specific configuration of the quantitative supply device 300 of the gas generator 200 for producing a core of the present invention.

As shown in FIG. 4, the fixed quantity supply device 300 includes a main tube 320 having a large inlet side pipe 340 and a discharge side pipe 350, and a main piston located inside the main tube 320. 330, a reciprocating cylinder 310 for vertically reciprocating the main piston 330, an exhaust pipe 380 connected to a side surface of the main tube 320, an auxiliary tube 360, and the It consists of a fine adjustment device 370 formed in the auxiliary tube.

The reciprocating cylinder 310 is configured as a device capable of driving up and down, such as a hydraulic cylinder, as shown in Figure 4, located on the upper side of the main tube 320, by the vertical drive of the reciprocating cylinder 310 The main piston 330 connected to the reciprocating cylinder 310 is configured to move up and down.

The main piston 330 is completely sealed by a rubber ring 337 or the like so that the inside and the bottom of the main tube 320 are sealed, and the liquefied amine gas supplied through the inlet pipe 340 is the main tube. In the middle portion of the main piston 330 to be transferred into the 320, the outer diameter of the main piston 330 and the inner wall of the main tube 320 forms a constant space (first space: S ₁ ) To form a step for each section of the piston 330. That is, compared with the diameter of the upper and lower cross sections of the main piston 330, the cross section of the middle portion of the main piston 330 is configured to have a smaller diameter, the first generated by the step of the main piston 330 The space S ₁ is configured to be filled with the liquefied amine gas.

Preferably, as shown in FIG. 4, the main piston 330 has a central axis 331 over the entire length of the piston with respect to its center line XX, and a portion having a diameter of a large cross section of upper and lower sides. Around the central axis 331 between the annular upper piston head 332 and the lower piston head 333 and the upper and lower piston head 333 to completely enclose the central axis 331 to form a It may be configured to include a spacing spring 334 disposed, the upper and lower piston heads (332, 334) in the rubber ring for a complete airtight of the main piston 330 and the main tube 320. 337) can be installed.

In this case, both ends of the central shaft 331 of the main piston 330 may be configured by a combination of bolts and nuts 335 and 336 to fix the upper and lower piston heads 332 and 333. Among them, the bolt and nut fixing the lower piston head 333 are the bolts and nuts 335 for adjusting the gap, and the lower piston is adjusted by adjusting the tightening of the gap adjusting nuts 335 under the open main tube 320. According to the vertical movement of the head 333 is configured to set the volume of the first space (S ₁ ) inside the main tube 320 is maintained by the spring for adjusting the spacing (334).

On the contrary, the upper piston head 332 is formed in an integrated form with the central shaft 331 to form the shape of the upper piston head 332 fixed to the central shaft 331 without a combination of bolts and nuts. Can be implemented.

The main tube 320 is a circular tube surrounding the main piston 330, and the outer surface of the upper and lower piston heads 332 and 333 of the main piston 330 and the inner wall of the main tube 320 come into contact with each other. And configured to be connected to each of the inlet-side pipe 340, the discharge-side pipe 350, the exhaust pipe 380, and the auxiliary tube 360.

As shown in FIG. 4, an inlet side pipe 340 through which the liquefied amine gas passed through the second auxiliary tank 150 is connected to one side surface of the main tube 320 is connected to the inlet side pipe 340. A discharge side pipe 350 which is discharged to be introduced into the first space (S ₁ ) inside the main tube 320 to be discharged to be introduced into the process is connected to the lower side of the connection.

In addition, the other side of the main tube 320 is formed by connecting the auxiliary tube 360 so as to fill the additional liquid other than the liquefied amine gas filled in the first space (S ₁ ), the auxiliary tube ( 360 and the main tube 320 is configured to be connected to the exhaust pipe 380 through the T-shaped tube 381, so as to facilitate the discharge of air as the liquid phase is filled.

In the inner space of the auxiliary tube 360, a second space S ₂ having a fixed volume and a third space S ₃ having a variable volume are formed, and the third space S _{3 is} formed. Fine adjustment device 370 is installed to have a variable volume.

As shown in FIG. 4, the fine adjustment device 370 includes a fine motor 371, a rack and pinion 373, an encoder 372 for positioning, and a piston 374 for fine adjustment. do.

Looking at the operation of the fine adjustment device 370 step by step as follows.

First, in the case of the third space (S ₃ ), as shown in Figure 4, the internal volume amount is configured to change according to the position of the fine adjustment piston 374. Therefore, according to the operator's instructions, the fine adjustment motor 371 is driven to move the rack and pinion 373 connected to the fine adjustment piston 374 up and down, and fine adjustment at a position corresponding to a predetermined predetermined internal volume amount The positioning encoder 372 connected to the fine motor 371 is configured to stop driving of the fine motor 371 so that the piston 374 can be positioned.

In addition, the configuration of the fine adjustment device 370 is configured to include an external control panel that is controlled by an electrical signal and preset the volume change amount when moving up and down according to the rotational speed, according to the model of the vehicle and the state of the mold If a specified input value is designated, an electrical signal for the input is transmitted to the fine adjustment device 370 so that the fine adjustment motor 371 and the positioning encoder 372 are positioned at a height corresponding to the operator's signal. Can be.

Hereinafter, as a configuration included in the present invention, the setting and operation of the quantitative supply device 300 will be described in detail through a preferred embodiment.

In this embodiment, in a steady state (up to a volume of the third state space,), that is, as shown in Figure 4, and as 15㎖ the volume of said third space (S ₃₎ in the "A" position, the The volume of the second space S ₂ is called 25 ml. And, the volume of the first space (S ₁ ) can be set as the operator properly adjust the tightening of the gap adjusting nut 335, in this embodiment, the volume of the first space (S ₁ ) to 40ml Set it.

In this case, the maximum drawn amount of the liquefied amine gas of the quantitative supply device 300 is 15 ml which is the maximum volume of the third space S ₃ in the volume of the first space S ₁ and the second space S ₂ . The sum is 80 ml, and the minimum draw amount is 65 ml, which is the sum of 0 ml, which is the minimum volume of the third space S ₃ .

When the operator designates the mold number according to the model of the vehicle and the state of the mold during the initial maintenance operation, the motor for fine adjustment 371 operates according to the operator's selection, and the rack and pinion 373 and the piston for fine adjustment 374 connected thereto. This will descend. The positioning encoder 372 senses the volume set value according to the operator's designation, and the fine adjustment piston 374 stops at the set position.

For example, the volume set value of the third space S ₃ specified by the operator is 10 ml (in this case, the total volume is 75 ml of the sum of the volume of the first space S ₁ and the volume of the second space S ₂ ). In this case, the fine adjustment piston 374 is controlled to stop at the "B" position. Further, when the volume setting value is 5 ml (total volume 70 ml), the fine adjustment piston 374 is controlled to stop at the "C" position, and when the volume setting value is 0 ml (total volume 65 ml) "D" Control to stop in position.

When the amount of liquefied amine gas introduced according to the designation of the operator is determined, as shown in FIG. 5A, the reciprocating cylinder 310 is raised to raise the main piston 330, thereby closing by the upper piston head 332. The inlet-side pipe 340 was opened, and the liquefied amine gas of gravity supply device 300 was composed of the first space S ₁ , the second space S ₂ , and the third space S ₃ by gravity. It is filled with internal space. At the same time, the closed exhaust solenoid valve 382 disposed in the exhaust pipe 380 is opened to discharge the air filled therein to the outside. The exhaust solenoid valve 382 is closed again when all the internal space is filled, and when the liquefied amine gas is discharged through the discharge side pipe 350 to be opened again so that the discharge proceeds smoothly. As shown in FIG. 5A, when the reciprocating cylinder 310 is raised, the discharge side pipe 350 is kept closed by the lower piston head 333.

After a predetermined time has elapsed, when all of the internal space of the metering supply device 300 is filled, the main piston 330 is lowered as shown in FIG. 5B as the reciprocating cylinder 310 descends, and the inlet side The pipe 340 is closed by the upper piston head 332, and the discharge side pipe 350 is opened by the lowering of the lower piston head 333. Therefore, when a predetermined time has elapsed, all of the liquefied amine gas that has been filled in the internal space of the quantitative supply device 300 is discharged through the discharge side pipe 350 by gravity and vaporized by heated air. Is supplied to the plant.

After a predetermined time elapses until all the liquefied amine gas is discharged, the reciprocating cylinder 310 is raised again to repeat the above-described process.

In addition, if the model of the vehicle is changed during the process or the reset of the liquefied amine gas input amount is required due to the change of the mold state, the operation is stopped, and the above-described dose setting process is performed again to apply the required liquefied amine gas input amount. You can reset it to match.

In addition, it is configured to monitor the operator through the means for displaying the set value for the input amount, it is easy to know the current input amount compared to the standard amount, it is easy to derive the problem of equipment when it is out of the limit for the standard amount can do.

Therefore, the gas generator 200 for core fabrication of the present invention and the gas supply apparatus including the same limit the vaporization and bubble generation of the liquefied amine gas, and the quantified according to each type and mold state through the quantitative supply apparatus 300. The input amount can be set, which can reduce the cost and improve the working environment.

While the invention has been described with reference to the preferred embodiments, those skilled in the art will appreciate that modifications and variations of the elements of the invention may be made without departing from the scope of the invention. In addition, many modifications may be made to particular circumstances or materials without departing from the essential scope of the invention. Therefore, the invention is not limited to the details of the preferred embodiments of the invention, but will include all embodiments within the scope of the appended claims.

1 is a schematic configuration diagram of a gas supply device including a gas generator for core fabrication according to the prior art;

Figure 2 is a schematic configuration diagram of a gas supply device including a gas generator for producing a core according to the present invention.

3 is a schematic configuration diagram of a gas supply device to which a plurality of gas generators are connected.

4 is a cross-sectional view of the metering supply device included in the present invention.

Figures 5a and 5b is an operating state diagram of the metering supply device included in the present invention.

<Description of Symbols Used in Main Parts of Drawings>

140: first auxiliary tank 330: main piston

150: second auxiliary tank 340: inlet-side piping

300: fixed-quantity supply device 350: discharge side piping

310: reciprocating cylinder 360: auxiliary tube

320: main tube 370: fine adjustment device

Claims (10)

In the gas generator for core manufacturing, An inlet side pipe into which liquefied amine gas is introduced; A main tube connected to the inlet pipe; A main piston in contact with an inner wall of the main tube and forming a predetermined internal space with the main tube; An auxiliary tube having a predetermined inner space connected to the main tube; A fine adjustment device for adjusting a predetermined inner space of the auxiliary tube; A reciprocating cylinder connected to the main piston and capable of driving up and down; A discharge side pipe connected to the main tube; A gas generator for core fabrication, which is configured to include a fixed-quantity supply device, wherein quantitative supply of liquefied amine gas is possible. The gas generator for core manufacturing according to claim 1, further comprising a first auxiliary tank including a liquid level measuring device. The gas generator for core fabrication according to claim 2, further comprising a second auxiliary tank for temporarily storing the liquefied amine gas which has passed through the first auxiliary tank. The fine adjustment device according to any one of claims 1 to 3, further comprising: a motor for fine adjustment; A rack and pinion connected to the fine motor; A fine adjustment piston connected to the pinion to adjust a volume of the auxiliary tube according to vertical movement; A positioning encoder for controlling the driving stop of the fine adjustment motor; The gas generator for core manufacture characterized by the above-mentioned. The gas generator for core manufacturing according to claim 4, wherein the fine adjustment device further comprises a control panel capable of controlling the fine adjustment motor and the positioning encoder by an electrical signal. The gas generator for core fabrication of claim 5, further comprising an exhaust line for the main tube and the auxiliary tube, and an exhaust line for the first auxiliary tank and the second auxiliary tank. The liquid level measuring apparatus of claim 1, wherein the liquid level measuring device of the first auxiliary tank measures whether the lower limit and the upper limit of the liquid level of the liquefied amine gas in the first auxiliary tank are reached, and at the upper limit, the pump of the main tank connected to the gas generator. A gas generator for producing a core, wherein the operation of the unit is stopped and the operation of the pump unit is resumed at the lower limit. The method according to claim 7, further comprising a blocking solenoid valve for opening and closing the pipe line connected to the main tank and the pump unit at the same time according to the operation of the pump unit according to the liquid level measurement of the first auxiliary tank. Gas generator for core manufacturing. The core manufacturing method according to any one of claims 1 to 3, further comprising a leakage line at a lower portion of the metering device for recovering leakage of the liquid amine gas between the main tube and the main piston. Gas generator. In the gas supply apparatus including the gas generator for core manufacturing, A main tank in which liquefied amine gas is stored; A pump unit for pumping liquefied amine gas in the main tank; A gas generator for supplying the amine gas to the core fabrication facility; A closed circuit for liquefied amine gas transfer consisting of a supply pipe and a return pipe connecting the gas generator and the main tank; A gas supply device comprising a gas generator for core fabrication, The gas generator includes a first auxiliary tank including a liquid level measuring device; A second auxiliary tank for temporarily storing the liquefied amine gas which has passed through the first auxiliary tank; An inlet side pipe into which the liquefied amine gas is introduced, a main tube connected to the inlet side pipe, a main piston in contact with an inner wall of the main tube and forming a predetermined internal space with the main tube, and a predetermined connection to the main tube A fixed quantity supply device comprising an auxiliary tube having an inner space, a fine adjusting device for adjusting a predetermined internal space of the auxiliary tube, a reciprocating cylinder connected to the main piston to be driven up and down, and a discharge side pipe connected to the main tube. It is a gas generator containing; The gas supply apparatus containing the gas generator for core manufacturing characterized by the above-mentioned.

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