Isostatic pressing device capable of rapid heating and cooling through a pressurized liquid circulation fan

Abstract

The object of the present invention is to pressurize a workpiece by means of a pressurized liquid. More specifically, the present invention relates to an isostatic pressing device that cools or heats the workpiece by pressurizing or cooling the pressurized liquid, and that can rapidly heat and cool the workpiece by means of a pressurized liquid circulation fan that can achieve isostatic pressing. According to an embodiment of the present invention, an isostatic pressing device that can quickly heat and cool by a pressurized liquid circulation fan includes: a pressure vessel, which pressurizes and forms a workpiece by the pressure of a pressurized liquid; a heat exchanger, which is arranged inside the pressure vessel and exchanges heat with the pressurized liquid to heat or cool the pressurized liquid; and a heating and cooling supply unit, which selectively heats or cools a heat medium used to heat or cool the heat exchanger and supplies it to the heat exchanger. The isostatic pressing device includes: a pressurized liquid circulation fan, which is located inside the pressure vessel and circulates the pressurized liquid inside the pressure vessel; a circulation fan motor, which rotates the pressurized liquid circulation fan; a motor accommodating unit, which is separated from the pressure vessel to accommodate the circulation fan motor; and an equalizing pressure regulating unit, which increases or decreases the internal pressure of the motor accommodating unit according to the internal pressure of the pressure vessel to block the pressurized liquid from leaking into the motor accommodating unit due to the pressure difference between the pressure vessel and the motor accommodating unit.

Description

Technical Field

[0001] The object of the present invention is to pressurize a workpiece by means of a pressurized liquid. More specifically, the present invention relates to an isostatic pressing device that cools or heats the workpiece by pressurizing or cooling the pressurized liquid, and that can rapidly heat and cool the workpiece by means of a pressurized liquid circulation fan that can achieve isostatic pressing. Background Art

[0002] Generally, an isostatic pressing apparatus supplies high-pressure fluid into a pressure vessel to shape a workpiece by the pressure of the fluid.

[0003] Isostatic pressing equipment is categorized as either warm isostatic press (WIP) or hot isostatic press (HIP), performed in a heated state, or cold isostatic press (CIP), performed in a cooled state. HIP uses a gaseous fluid, while WIP and CIP use a liquid. HIP, in particular, is used for products that heat the gaseous fluid to temperatures above 300°C to 2500°C, distinguishing it from WIP, which uses a liquid below 250°C, and CIP, which uses a room-temperature liquid.

[0004] Generally, the heating or cooling of the WIP takes a long time, and when the workpiece is taken out after compression processing, it needs to be taken out at a high temperature. Therefore, for products that have deformed at a high temperature, they need to be cooled before being taken out. Under this operating state, the workpiece will rebound after being compressed and return to its original shape, thereby reducing the significance of the compression process.

[0005] In order to solve this problem, the present applicant has developed Korean Patent No. 10-1708490 (hereinafter referred to as "prior art 1") and Korean Patent No. 10-2138354 (hereinafter referred to as "prior art 2").

[0006] Prior art 1 is configured to cool or heat a heat exchanger by selecting a supply portion to selectively perform cold isostatic pressing and hot isostatic pressing, and prior art 2 is configured to circulate fluid through a bracket, thereby quickly changing the temperature of the pressurized fluid and processing the workpiece with fast and uniform quality.

[0007] In this regard, in Korean Patent Gazette No. 10-1311563 (hereinafter referred to as "prior art 3"), the circulation amount of the medium gas in the fluid can be adjusted by a forced circulation device.

[0008] However, since there is no structure for separately circulating the pressurized medium in the prior art 1 and the prior art 2, the heating and cooling of the pressurized medium requires a long time. Although the prior art 3 can force the pressurized medium to circulate through a forced circulation device, there is a problem that the pressurized medium flows into the motor driving the fan and damages the motor, and the motor is damaged due to the pressure difference. Summary of the Invention

[0009] (1) Technical issues to be resolved

[0010] The present invention is proposed to solve the above-mentioned problems. The present invention aims to provide an isostatic pressing device that can quickly heat and cool by means of a pressurized fluid circulation fan. The device can heat or cool a heat medium in a heating and cooling supply part having a heater and a cooler and then supply it to a heat exchanger. Therefore, cold isostatic pressing and hot isostatic pressing can be performed after heating or cooling the pressurized fluid, so that a workpiece that has rebounded or deformed under high temperature conditions can be quickly cooled and removed.

[0011] In addition, the present invention aims to provide an isostatic pressing device that can be quickly heated and cooled by a pressurized liquid circulation fan. When the circulating fan motor is accommodated in the motor accommodating portion, the device evenly adjusts the pressure of the motor accommodating portion according to the pressure changes of the pressure vessel through the equalizing pressure regulating portion, thereby preventing the pressurized liquid from penetrating into the motor accommodating portion due to the pressure difference and causing damage to the circulating fan motor.

[0012] In addition, the present invention aims to provide an isostatic pressing device that can quickly heat and cool through a pressurized liquid circulation fan. In the device, the pressurized liquid circulation fan rotates while forming a circulating airflow for the pressurized liquid through a bracket, so that the pressurized liquid can be quickly heated and cooled while maintaining a constant temperature for a long time, thereby avoiding poor molding of the workpiece and achieving fast processing operations.

[0013] (2) Technical solution

[0014] The isostatic pressing device capable of rapid heating and cooling by a pressurized liquid circulation fan according to an embodiment of the present invention for achieving the above technical problem comprises: a pressure vessel for pressurizing and molding a workpiece using the pressure of a pressurized liquid; a heat exchanger arranged inside the pressure vessel for exchanging heat with the pressurized liquid to heat or cool the pressurized liquid; and a heating and cooling supply unit for selectively heating or cooling a heat medium for heating or cooling the heat exchanger and supplying it to the heat exchanger, wherein the isostatic pressing device comprises: a pressurized liquid circulation fan located inside the pressure vessel for circulating the pressurized liquid inside the pressure vessel; a circulation fan motor for rotating the pressurized liquid circulation fan; a motor accommodating unit separated from the pressure vessel for accommodating the circulation fan motor; and a pressure equalizing regulating unit for increasing or decreasing the internal pressure of the motor accommodating unit according to the internal pressure of the pressure vessel to block leakage of the pressurized liquid into the motor accommodating unit due to the pressure difference between the pressure vessel and the motor accommodating unit.

[0015] The pressure equalizing adjustment portion may include a bellows component located between the pressure container and the motor accommodating portion, and having a volume that increases or decreases according to an increase or decrease in the pressure of the pressure container to adjust the pressure of the motor accommodating portion.

[0016] The bellows member may be formed by alternately joining inner circumferences and outer circumferences adjacent to each other in a stacked state with a plurality of annular plates formed of metal.

[0017] The isostatic pressing apparatus may include an insulating liquid filled into the motor accommodation portion to easily change an internal pressure of the motor accommodation portion according to an operation of the equalizing pressure adjusting portion.

[0018] The heat exchanger may be constructed by stacking a plurality of heat conducting plates forming medium flow channels and circulation flow channels, such that the medium flow channels through which the heat medium passes and the circulation flow channels through which the pressurized liquid passes are not connected to each other.

[0019] The heat exchanger may include: a central supply portion formed in the center of the exchanger, on which the pressurized liquid circulation fan is provided and which is connected to one end of the circulation channel to supply pressurized liquid from the circulation channel through the pressurized liquid circulation fan, or to the circulation channel; and a placement supply portion connected to the bracket and the other end of the circulation channel to supply the pressurized liquid passing through the circulation channel to the bracket on which the workpiece is placed, or to supply the pressurized liquid to the circulation channel via the bracket.

[0020] The isostatic pressing device may include: a bracket for placing the workpiece to transport the workpiece into the pressure vessel or take the workpiece out of the pressure vessel, and the bracket may include: inlet and outlet ports formed at the upper and lower portions of the bracket, respectively, so that the pressurized liquid flows into and out of the interior of the bracket, so that the pressurized liquid forms an airflow that circulates the workpiece; and a bracket wall surrounding the inlet and outlet ports to separate the placement space for accommodating the workpiece and the pressure vessel in the pressure vessel.

[0021] (3) Beneficial effects

[0022] According to the present invention, the heat exchanger can be heated or cooled by the heating and cooling supply part, so that a WIP can be provided that can quickly change the temperature and can be quickly cooled in a state of maintaining the pressure under a high-temperature and high-pressure pressurized liquid, thereby shortening the processing operation time and, in particular, producing high-quality products without pores and with suppressed rebound.

[0023] In addition, the pressurized liquid is circulated by the pressurized liquid circulation fan, and a circulating airflow is formed through the bracket to circulate the pressurized liquid, thereby not only maintaining a constant temperature of the pressurized liquid for a long time, but also quickly changing the temperature of the pressurized liquid to perform fast processing operations, and minimizing the occurrence of defects in the workpiece.

[0024] In addition, the circulating fan motor is arranged in a motor accommodating part separated from the pressure vessel, and a pressure equalizing regulating part is provided in the motor accommodating part to adjust the pressure of the motor accommodating part corresponding to the pressure of the pressure vessel, thereby preventing damage to the shaft seal and preventing pressurized liquid from flowing into the motor accommodating part and causing damage to the circulating fan motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a side sectional view schematically showing an isostatic pressing apparatus capable of rapid heating and cooling by a pressurized liquid circulating fan according to an embodiment of the present invention.

[0026] Figure 2 is a side sectional view schematically showing a heat exchanger of an isostatic pressing apparatus capable of rapid heating and cooling by a pressurized liquid circulation fan according to an embodiment of the present invention.

[0027] Figure 3 is a side sectional view schematically illustrating an operating state of a motor housing portion of an isostatic pressing apparatus capable of rapid heating and cooling by a pressurized liquid circulation fan according to an embodiment of the present invention.

[0028] Description of Reference Numerals

[0029] 100: Isostatic pressing device that can be heated and cooled quickly by a pressurized fluid circulation fan

[0030] 110: Pressure vessel 111: High pressure seal

[0031] 113: Insulation material 115: Cover

[0032] 120: Pressurized liquid supply device 130: Heat exchanger

[0033] 131: Central Supply Department 133: Resettlement Supply Department

[0034] 135: heat conduction plate 135a: circulation channel

[0035] 135b: Medium flow channel 140: Heating and cooling supply part

[0036] 141: Heater 143: Cooler

[0037] 145: Circulation pump 150: Pressurized liquid circulation fan

[0038] 151: Circulation fan motor 153: Shaft seal

[0039] 160: Motor housing 165: Pressure equalization adjustment unit

[0040] 166: Pressure chamber 167: Bellows component

[0041] 170: Bracket 171: Bracket wall

[0042] 173: Inflow and outflow 175: Shelf DETAILED DESCRIPTION

[0043] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

[0044] like Figure 1 As shown, an isostatic pressing apparatus 100 capable of rapid heating and cooling by a pressurized liquid circulation fan 150 according to an embodiment of the present invention may include a pressure vessel 110 .

[0045] The pressure vessel 110 can be filled with a pressurized liquid and can process the workpiece by uniformly pressurizing the workpiece contained therein using the pressurized liquid around the workpiece.

[0046] In the embodiments, processing refers to all deformations of the workpiece, such as applying pressure to the workpiece to change its shape, compressing powder into a desired shape, compacting the structure of the workpiece by pressure, changing the structure by pressure, or diffusion bonding by pressure.

[0047] The pressure container 110 may be formed in a cylindrical shape with either the upper or lower part open, or both the upper and lower parts open, and may be provided with a cover 115 that opens and closes the upper, lower, or both the upper and lower parts of the opening.

[0048] The cover 115 provided on the pressure vessel 110 may be configured to be opened and closed by a cover opening and closing component, and the cover 115 may be partially inserted into the interior of the pressure vessel 110 to form an insertion portion that seals the opening portion of the pressure vessel 110 and whose outer diameter corresponds to the inner diameter of the pressure vessel 110 .

[0049] A high-pressure seal 111 may be provided between the cover and the pressure vessel 110 to prevent the pressurized liquid filled inside the pressure vessel 110 from leaking to the outside, and the high-pressure seal 111 may apply various forms of known high-pressure seals 111, which can be elastically deformed by the internal pressure of the pressure vessel 110 to achieve airtightness, or can be guided by an inclined surface and improve airtightness when pressure is applied to an inclined surface, etc.

[0050] A filling port and a discharge port for filling pressurized liquid into and discharging pressurized liquid from the interior of the pressure vessel 110 may be formed in the pressure vessel 110, and the filling port and the discharge port may be formed on the cover 115. When the pressure vessel 110 is configured to have a cover 115 at the lower portion so that the lower portion can be opened, a separate discharge port may not be required.

[0051] The filling port of the pressure container 110 is connected to the pressurized liquid supply device 120 , so that the pressurized liquid can be supplied to the interior of the pressure container 110 at high pressure through the pressurized liquid supply device 120 .

[0052] At this time, the pressurized liquid supply device 120 may also be implemented as a pump or a piston to supply the pressurized liquid at high pressure.

[0053] On the other hand, in order to withstand high pressure, the pressure vessel 110 may be wound with metal wires to enhance the rigidity of the pressure vessel 110 . The metal wires may also be implemented as piano wires.

[0054] When the pressure vessel 110 is reinforced with metal wires, it can withstand ultra-high pressure of more than 6000 bar, so the workpiece can be processed under ultra-high pressure.

[0055] A heat insulating material 113 may be provided inside the pressure vessel 110 to prevent the heat inside the pressure vessel 110 from being discharged to the outside or from exchanging heat with the outside to cause temperature changes.

[0056] The heat insulating material 113 is not only provided inside the pressure vessel 110 but also provided on the cover 115 of the pressure vessel 110 , thereby being able to thermally insulate the entire internal space of the pressure vessel 110 .

[0057] The purpose of using the heat insulating material 113 is to insulate the temperature of the pressurized liquid heated or cooled inside the pressure vessel 110 rather than to insulate the temperature of the pressure vessel 110 , thereby improving the heating and cooling properties of the workpiece.

[0058] The pressurized liquid filled into the pressure vessel 110 to pressurize the workpiece may be water or oil.

[0059] Among them, when the workpiece is pressurized by gas, since the compression rate of gas is higher than that of liquid, not only does it take longer to compress the workpiece, but compared with liquid, the volume it occupies is too large to be stored, and there is also the problem of difficulty in recovery and disposal in the event of a leak.

[0060] Therefore, in the embodiment, the pressure vessel 110 is filled with pressurized liquid for pressurizing the workpiece. Therefore, the liquid is easier to store than gas, and in the event of a leak, it is not only easy to recover but also easy to handle.

[0061] like Figure 1 As shown, the isostatic pressing apparatus 100 capable of rapid heating and cooling by a pressurized fluid circulation fan 150 according to an embodiment of the present invention may include a bracket 170 .

[0062] The bracket 170 can accommodate a workpiece to carry the workpiece into the pressure vessel 110 or take the workpiece out of the pressure vessel 110 .

[0063] The bracket 170 is provided with a plurality of shelves 175 , and a workpiece is placed on each shelf 175 so as to carry the workpiece into the pressure vessel 110 or take the workpiece out of the pressure vessel 110 .

[0064] The bracket 170 can not only carry the workpiece into or out of the pressure vessel 110 , but also form a circulating airflow of pressurized liquid inside the pressure vessel 110 .

[0065] The bracket 170 may include a bracket wall 171 that partitions an inner space where the workpiece is located and a space between the pressure vessel 110 , and the bracket wall 171 may be formed in a cylindrical shape.

[0066] The bracket wall 171 may be provided with an opening and closing door for opening and closing the bracket wall 171 so that the workpiece can be carried into or taken out of the bracket 170 .

[0067] The bracket 170 can form an inflow outlet 173 at the upper and lower parts for fluid to flow in and out, so that the pressurized liquid passes through the internal space. The inflow outlet 173 can be formed into a shape that penetrates the upper and lower parts of the bracket 170, or the inflow outlet 173 can also be formed into a shape that completely opens the upper and lower parts of the bracket 170.

[0068] A plurality of shelf 175 holes through which pressurized liquid passes may be formed through the shelf 175 so that the pressurized liquid can pass through the inner space.

[0069] In an embodiment, the bracket 170 is configured to circulate the pressurized liquid in the following manner, i.e., the pressurized liquid flows into the interior of the bracket 170 through the inlet outlet 173 at the upper portion of the bracket 170, and is discharged to the outside of the bracket 170 through the inlet outlet 173 at the lower portion of the bracket 170, and the discharged pressurized liquid is moved upward again from the outside of the bracket wall 171 to the upper portion of the bracket 170 by the pressurized liquid circulation fan 150, thereby flowing into the interior of the bracket 170 through the inlet outlet 173 located at the upper portion of the bracket 170.

[0070] However, the pressurized liquid can also circulate in a manner opposite to that of the embodiment, that is, the pressurized liquid flows into the interior of the bracket 170 through the inlet outlet 173 formed at the lower portion of the bracket 170, is discharged through the inlet outlet 173 formed at the upper portion of the bracket 170, and moves downward through the outside of the bracket wall 171 and flows in again through the inlet outlet 173 formed at the lower portion of the bracket 170.

[0071] The bracket 170 is set on the cover 115 of the sealed pressure vessel 110, so when the cover 115 is opened, the bracket 170 can be taken out of the pressure vessel 110 together, and when the pressure vessel 110 is sealed with the cover 115, the bracket 170 can be carried into the interior of the pressure vessel 110 together.

[0072] like Figure 1 and Figure 2 As shown, the isostatic pressing apparatus 100 capable of rapid heating and cooling by a pressurized liquid circulation fan 150 according to an embodiment of the present invention may include a heat exchanger 130 .

[0073] The heat exchanger 130 is provided inside the pressure vessel 110 to perform heat exchange with the pressurized liquid filled inside the pressure vessel 110 , thereby heating or cooling the pressurized liquid.

[0074] The heat exchanger 130 may perform heat exchange with the heat medium by circulating the heat medium, thereby performing heating or cooling.

[0075] The heat exchanger 130 may include a medium flow channel 135 b through which a heat medium passes and performs heat exchange, and a circulation flow channel 135 a through which a pressurized liquid passes and performs heat exchange.

[0076] The medium flow channel 135 b and the circulation flow channel 135 a may be formed in the heat exchanger 130 without being connected to each other to prevent the heat medium and the pressurized liquid from being mixed.

[0077] The heat exchanger 130 may be configured in a shape in which a plurality of heat conducting plates 135 are stacked, and the plurality of heat conducting plates 135 may be bonded by diffusion bonding.

[0078] For example, the heat exchanger 130 may be manufactured by forming a circulation channel 135a groove for forming the circulation channel 135a and a medium channel 135b groove for forming the medium channel 135b in each of the plurality of heat conducting plates 135, and then bonding the plurality of heat conducting plates 135 while overlapping each other.

[0079] Here, the circulation flow channel 135 a and the medium flow channel 135 b formed in the heat conduction plate 135 are not connected to each other, so the pressurized liquid and the heat medium can move independently without mixing.

[0080] Alternatively, the plurality of heat conducting plates 135 may be bonded by diffusion bonding in which the plates are bonded by pressure applied by an external force.

[0081] The heat exchanger 130 may include a central supply part 131 and a seating supply part 133 .

[0082] The central supply portion 131 may be formed at the center of the heat exchanger 130 and may communicate with one end of the circulation flow channel 135 a .

[0083] A portion of the pressurized liquid circulation fan 150 that generates suction for sucking in pressurized liquid is provided in the central supply portion 131 , so that the pressurized liquid heated or cooled through the circulation flow channel 135 a can be supplied to the pressurized liquid circulation fan 150 by the suction of the pressurized liquid circulation fan 150 .

[0084] The bracket 170 can be placed in the placement and supply part 133. When the bracket 170 is placed in the placement and supply part 133, the placement and supply part 133 can connect the inner periphery of the bracket wall 171 and the other end of the circulation channel 135a, so that the pressurized liquid that exchanges heat with the workpiece through the bracket 170 can flow into the heat exchanger 130 after passing through the bracket 170.

[0085] For example, when the bracket 170 is placed in the placement and supply portion 133, the lower end of the bracket 170 is in close contact with the placement and supply portion 133, so that the pressurized liquid can be moved to one end of the circulation channel 135a through the suction force of the pressurized liquid circulation fan 150 through the other end of the circulation channel 135a and undergo heat exchange, and then be sucked into and discharged to the outside of the bracket 170 by the pressurized liquid circulation fan 150.

[0086] like Figure 1 As shown, the isostatic pressing apparatus 100 capable of rapid heating and cooling by a pressurized liquid circulation fan 150 according to an embodiment of the present invention may include a heating and cooling supply part 140 .

[0087] The heating and cooling supply unit 140 may heat or cool the heat medium and then supply the heat medium to the heat exchanger 130 to heat or cool the heat exchanger 130 .

[0088] The heating and cooling supply part 140 may include a heater 141 for heating the heat medium and a cooler 143 for cooling the heat medium.

[0089] For example, the heater 141 may be implemented as a heater 141 heated by electricity or a thermoelectric element.

[0090] For example, the cooler 143 may include a thermoelectric element, and cool the heat medium using a cooling surface of the thermoelectric element.

[0091] As another example, the cooler 143 may be configured to include a refrigeration cycle such as a condenser, an evaporator, a compressor, and an expander, so that the phase change material cools the evaporator while passing through the refrigeration cycle and the heat medium exchanges heat with the evaporator and is cooled.

[0092] The heating and cooling supply unit 140 includes a medium circulation pump 145 , so that the heat medium can be forced to circulate through the heat exchanger 130 , the heater 141 , and the cooler 143 through the medium circulation pump 145 to perform heating or cooling.

[0093] To heat or cool the pressurized liquid, the heating and cooling supply part 140 may selectively operate the heater 141 and the cooler 143 .

[0094] For example, the heating and cooling supply unit 140 may stop the operation of the cooler 143 and operate only the heater 141 when heating the pressurized liquid, and may stop the operation of the heater 141 and operate only the cooler 143 when cooling the pressurized liquid.

[0095] At this time, the heating and cooling supply unit 140 can operate only one of the heater 141 and the cooler 143 to heat or cool the heat medium when the heater 141 and the cooler 143 are connected in series, or can select the heating and cooling of the heat medium by controlling the heat medium to pass through only one of the heater 141 and the cooler 143 when the heater 141 and the cooler 143 are connected in parallel.

[0096] like Figure 1 As shown, the isostatic pressing apparatus 100 capable of rapid heating and cooling by a pressurized liquid circulating fan 150 according to an embodiment of the present invention may include a pressurized liquid circulating fan 150 and a circulating fan motor 151 .

[0097] The pressurized liquid circulation fan 150 is radially provided with a plurality of blades, and can generate suction and discharge forces by the centrifugal force of rotation. The pressurized liquid circulation fan 150 can be implemented as a centrifugal fan that draws fluid toward the center and discharges the drawn fluid to the periphery.

[0098] In addition to a centrifugal fan, the pressurized liquid circulation fan 150 may also be implemented as an impeller of various forms capable of conveying liquid.

[0099] A central portion of the pressurized liquid circulation fan 150 generating suction is located at the central supply portion 131 of the heat exchanger 130 , so that pressurized liquid can be sucked through the central supply portion 131 and discharged to the outside of the heat exchanger 130 .

[0100] The circulation fan motor 151 may rotate the pressurized liquid circulation fan 150 , and the circulation fan motor 151 may be implemented as an electric motor rotated by electricity.

[0101] When the circulation fan motor 151 is located inside the pressure container 110 , the pressurized liquid filled in the pressure container 110 flows into the circulation fan motor 151 , so there is a risk that the circulation fan motor 151 may be short-circuited.

[0102] Therefore, the circulation fan motor 151 may be accommodated in a motor accommodation portion 160 described below.

[0103] like Figure 1 and Figure 3 As shown, the isostatic pressing apparatus 100 capable of rapid heating and cooling by a pressurized liquid circulation fan 150 according to an embodiment of the present invention may include a motor accommodation portion 160 and a pressure equalization adjustment portion 165 .

[0104] The motor accommodation portion 160 may be separated from the space of the pressure container 110 filled with pressurized liquid to be formed as an independent space, and the circulation fan motor 151 may be accommodated in the motor accommodation portion 160 .

[0105] The motor shaft of the circulation fan motor 151 accommodated in the motor accommodation portion 160 can pass through the pressure vessel 110 and be coupled to the pressurized liquid circulation fan 150 located inside the pressure vessel 110, and a shaft seal 153 can be provided in the portion of the pressure vessel 110 through which the motor shaft passes to block the pressurized liquid from flowing into the motor accommodation portion 160.

[0106] The motor accommodation portion 160 may be filled with insulating liquid, and the insulating liquid has insulating properties, thereby preventing the circulation fan motor 151 from being short-circuited due to power supplied to the circulation fan motor 151 .

[0107] The circulation fan motor 151 may be located in the motor accommodation portion 160 in a state of being immersed in the insulation liquid in a state in which the insulation liquid is filled in the motor accommodation portion 160 .

[0108] The insulating liquid may be a liquid having a compressibility corresponding to that of the pressurized liquid filled in the pressure vessel 110 or lower, and the insulating liquid may be a non-solidifying liquid.

[0109] The pressure equalizing regulator 165 can increase or decrease the pressure of the motor housing 160 in proportion to the internal pressure of the pressure container 110 to make the internal pressure of the pressure container 110 equal to the internal pressure of the motor housing 160 or minimize the internal pressure difference between the two.

[0110] The pressure equalizing regulating part 165 can be set in the part where the motor housing part 160 and the pressure vessel 110 are connected. The pressure equalizing regulating part 165 minimizes the damage to the shaft seal 153 caused by the pressure difference by reducing the pressure difference between the pressure vessel 110 and the motor housing part 160, thereby blocking the pressurized liquid from flowing into the motor housing part 160, thereby minimizing the damage to the circulation fan motor 151.

[0111] The pressure equalizing regulating part 165 can be configured to form a pressure chamber 166 connected to the pressure vessel 110 in a part of the motor housing part 160 and be arranged in the pressure chamber 166, or to form the pressure chamber 166 in a part separated from the motor housing part 160, and to connect the pressure chamber 166 and the motor housing part 160 to each other through a connecting flow channel.

[0112] The pressure equalizing adjustment portion 165 may include a bellows component 167 .

[0113] The bellows component 167 can increase or decrease the pressure of the motor housing portion 160 in the following manner, that is, the volume of the bellows component 167 can be expanded or reduced by the pressurized liquid filled in the pressure container 110 to pressurize the insulating liquid in the motor housing portion 160 or release the insulating liquid pressure in the motor housing portion 160.

[0114] The bellows member 167 may be provided in the pressure chamber 166 in such a manner that its volume expands toward the motor accommodation portion 160 or contracts from an expanded state.

[0115] The bellows component 167 may be shaped such that one end is open and the other end is sealed, and the open end in the pressure chamber 166 may be arranged toward the direction of the pressure vessel 110 and the sealed other end may be arranged toward the direction of the motor accommodating portion 160 .

[0116] In the bellows component 167, the pressurized liquid of the pressure vessel 110 can flow into the opening part of the bellows component 167 to expand the volume of the bellows component 167. When the pressurized liquid flows out again in the state of the expanded volume of the bellows component 167, it can be deformed into the original shape by elastic force and the volume can be reduced.

[0117] The bellows member 167 may be formed of metal so as to be able to withstand the high pressure of the pressurized liquid filled in the pressure vessel 110 .

[0118] The bellows member 167 may be formed in a form in which a plurality of annular plate-shaped metal plates are stacked and alternately joined at inner and outer circumferences of adjacent annular plate-shaped metal plates to allow fluid to flow into the interior.

[0119] For example, the bellows component 167 can be manufactured in the following form, that is, when multiple annular plates are stacked, the inner circumferences of the annular plates adjacent to each other are joined, and then the annular plate located above them is joined to the outer circumferences of the annular plates whose inner circumferences are joined to each other, and the annular plate located above the annular plates joined at the outer circumferences is joined to the inner circumference again.

[0120] At this time, a sealing plate is joined to either end of the bellows member 167 , so that the bellows member 167 can be manufactured in a form in which one end is open and the other end is sealed.

[0121] On the other hand, in the pressure chamber 166 , when the volume of the bellows member 167 is expanded by the pressure of the pressure vessel 110 , the bellows member 167 reduces the space of the pressure chamber 166 and pressurizes the insulating liquid filled in the pressure chamber 166 , thereby increasing the pressure of the motor housing portion 160 .

[0122] On the contrary, when the pressure of the pressure vessel 110 decreases while the volume of the bellows part 167 is expanded, the pressurized liquid flowing into the bellows part 167 moves again into the pressure vessel 110 by the pressure of the pressure chamber 166, so that the volume can be reduced.

[0123] The functions and effects of the above-described structures will be described.

[0124] The isostatic pressing apparatus 100 capable of rapid heating and cooling by a pressurized liquid circulation fan 150 according to an embodiment of the present invention may be provided with a heat exchanger 130 for heating or cooling the pressurized liquid inside the pressure vessel 110, and may be provided with a heat insulating material 113 inside the pressure vessel 110 to minimize temperature changes caused by heating or cooling the pressurized liquid.

[0125] Since the pressurized liquid is supplied to the interior of the pressure vessel 110 at high pressure, the workpiece contained inside the pressure vessel 110 can be processed by the pressure of the pressurized liquid, and since a filling port and a discharge port are formed in the pressure vessel 110, the pressurized liquid can be supplied to the interior of the pressure vessel 110, or the pressurized liquid can be discharged from the interior of the pressure vessel 110 to the outside.

[0126] The pressurized liquid may be supplied to the interior of the pressure vessel 110 at high pressure through the pressurized liquid supply device 120 .

[0127] The heat exchanger 130 includes a circulation channel 135 a through which a pressurized medium passes and exchanges heat to achieve heating or cooling, and a medium channel 135 b through which a heat medium passes that is not connected to the circulation channel 135 a .

[0128] The heat exchanger 130 may include a central supply portion 131 connected to one end of the circulation flow channel 135 a so that the pressurized liquid passes therethrough and performs heat exchange.

[0129] In addition, a placement supply portion 133 for placing the bracket 170 may be formed in the heat exchanger 130, and the placement supply portion 133 may be configured to connect the inner periphery of the bracket 170 and the other end of the circulation channel 135a so that the pressurized liquid enters the circulation channel 135a of the heat exchanger 130 after passing through the bracket 170.

[0130] The heat exchanger 130 may be manufactured in a form in which a plurality of heat conducting plates 135 are overlapped and extended to withstand high pressure.

[0131] On the bracket 170 placed on the placement and supply part 133, a plurality of shelves 175 for placing the workpiece can be arranged in multiple stages, and a plurality of holes can be punched on the shelves 175 to allow the pressurized liquid to move.

[0132] The bracket 170 may form an inlet and outlet 173 through which pressurized liquid flows in and out, so that when the pressurized liquid passes from the upper part to the lower part, it pressurizes the workpiece while performing heat exchange with the workpiece, thereby heating or cooling the workpiece, and the bracket 170 is surrounded by a bracket wall 171, thereby separating the position of the workpiece and the flow channel through which the pressurized liquid passes in the pressure vessel 110.

[0133] The bracket 170 is coupled to the cover 115 , so the bracket 170 can be carried into or taken out of the pressure vessel 110 while the cover 115 is opened and closed.

[0134] The heat exchanger 130 may be connected to a heating and cooling supply unit 140 that supplies heat medium. The heating and cooling supply unit 140 includes a heater 141 and a cooler 143 , so that the heat medium may be selectively heated by the heater 141 or cooled by the cooler 143 and provided to the heat exchanger 130 .

[0135] The pressurized liquid circulation fan 150 for circulating the pressurized liquid may be located in the central supply portion 131 of the heat exchanger 130 , and the pressurized liquid circulation fan 150 may be rotated by a circulation fan motor 151 , and suck the pressurized liquid from the central supply portion 131 and discharge it to the periphery of the pressurized liquid circulation fan 150 .

[0136] The circulation fan motor 151 may be disposed in a motor accommodation portion 160 separated from the pressure container 110 . The motor accommodation portion 160 may be filled with insulating liquid, and the circulation fan motor 151 may be disposed in a state of being immersed in the insulating liquid.

[0137] In addition, a pressure equalization regulating portion 165 may be provided in the motor accommodation portion 160 to prevent the shaft seal 153 of the airtight circulation fan motor 151 from being damaged due to the pressure difference of the pressure container 110 .

[0138] The pressure equalizing regulator 165 may form a pressure chamber 166 communicating with the motor housing 160 and the inner space of the pressure vessel 110 , and a bellows component 167 that contracts or expands according to the pressure volume of the pressure vessel 110 is provided in the pressure chamber 166 .

[0139] In the pressure chamber 166 , the bellows component 167 can increase or decrease the internal pressure of the motor housing portion 160 in accordance with the internal pressure of the pressure vessel 110 by expanding or contracting in volume toward the motor housing portion 160 and pressurizing the insulating liquid filled in the motor housing portion 160 or releasing the pressure of the insulating liquid filled in the motor housing portion 160 .

[0140] The bellows member 167 may be formed of metal to minimize corrosion and withstand high pressure, and may be formed in a form in which a plurality of metal annular plates are stacked to alternately join outer and inner circumferences of adjacent annular plates.

[0141] The isostatic pressing apparatus 100 according to the embodiment of the present invention configured as described above, which can be quickly heated and cooled by the pressurized liquid circulation fan 150 , places a workpiece on the shelf 175 of the bracket 170 with the lid 115 of the pressure vessel 110 opened.

[0142] In addition, when the cover 115 of the pressure vessel 110 is closed, the bracket 170 is carried into the interior of the pressure vessel 110 , and when the pressure vessel 110 is sealed by the cover 115 , pressurized liquid is injected into the interior of the pressure vessel 110 through the pressurized liquid supply device 120 .

[0143] Pressurized liquid is injected into the pressure vessel 110 to maintain a preset pressure for pressurizing the workpiece. Under the preset pressure, the pressurized liquid applies pressure to the workpiece for a preset time to process the workpiece.

[0144] On the other hand, when processing the workpiece, when heating at high temperature or cooling, the heater 141 or the cooler 143 is selected and operated by the heating and cooling supply unit 140 .

[0145] When the heater 141 or the cooler 143 operates, the heat medium is heated by the heater 141 or cooled by the cooler 143 , and the cooled or heated heat medium is supplied to the heat exchanger 130 .

[0146] The heat medium supplied to the heat exchanger 130 can circulate in the medium flow channel 135b, and the pressurized liquid passes through the circulation flow channel 135a of the heat exchanger 130 heated or cooled by the heat medium and performs heat exchange, so that the workpiece can be heated or cooled and processed by heating or cooling the pressurized liquid.

[0147] On the other hand, the pressurized liquid heated or cooled by the heat exchanger 130 may circulate in the pressure vessel 110 by the pressurized liquid circulation fan 150 and rapidly change the temperature of the pressure vessel 110 and maintain the changed temperature constant.

[0148] When the pressurized liquid circulation fan 150 rotates, suction is generated in the central supply portion 131 of the heat exchanger 130, and at the same time, the pressurized liquid is sucked into the other end of the circulation flow channel 135a of the heat exchanger 130 through the placement supply portion 133 of the heat exchanger 130 to exchange heat with the heat exchanger 130, and the pressurized liquid heated or cooled by the heat exchange is supplied to the central supply portion 131 located at one end of the circulation flow channel 135a.

[0149] On the other hand, in the placement supply portion 133 located at the other end of the circulation channel 135a, the pressurized liquid will flow into the interior of the bracket 170 through the inlet outlet 173 formed at the upper part of the bracket wall 171 by suction, and the pressurized liquid flowing into the interior of the bracket 170 contacts the workpiece while pressurizing the workpiece to heat or cool the workpiece.

[0150] In addition, the pressurized liquid for cooling or heating the workpiece is discharged through the inlet port 173 formed at the lower portion of the bracket 170 and flows into the other end of the circulation channel 135a through the placement supply portion 133, and the fluid discharged by the pressurized liquid circulation fan 150 will move upward through the outside of the bracket wall 171 and flow into the interior of the bracket 170 through the inlet port 173 formed at the upper portion of the bracket 170.

[0151] That is, the pressurized liquid heated or cooled by the pressurized liquid circulation fan 150 through the heat exchanger 130 is discharged into the space between the bracket wall 171 and the pressure vessel 110, and at the same time moves toward the upper part of the pressure vessel 110, and flows into the interior of the bracket 170 through the inlet outlet 173 formed at the upper part of the bracket 170, and pressurizes and heat exchanges the workpiece when passing through the interior of the bracket 170 to perform heating or cooling.

[0152] The pressurized liquid for heating or cooling the workpiece is circulated in the following manner, that is, the pressurized liquid is supplied to the central supply part 131 through the placement supply part 133 of the heat exchanger 130, and is discharged again to the vicinity of the pressurized liquid circulation fan 150 after being sucked in by the pressurized liquid circulation fan 150, and moves between the bracket wall 171 and the pressure vessel 110.

[0153] In the embodiment, it is described in a form that the pressurized liquid passing through the heat exchanger 130 is discharged between the bracket wall 171 and the pressure vessel 110 while moving upward and circulates again through the inside of the bracket 170 to the heat exchanger 130 .

[0154] However, it can also be configured to circulate in the following manner, that is, the fluid discharged by the pressurized liquid circulation fan 150 flows into the interior of the bracket 170 through the heat exchanger 130 and exchanges heat with the workpiece, and is then discharged through the inlet outlet 173 at the upper part of the bracket 170, while moving downward between the pressure vessel 110 and the bracket wall 171, and again flows into the interior of the bracket 170 through the heat exchanger 130 through the pressurized liquid circulation fan 150.

[0155] As described above, when the pressurized liquid circulates through the pressurized liquid circulation fan 150, the pressurized liquid can be quickly cooled or heated due to rapid heat exchange with the heat exchanger 130, thereby achieving rapid cooling or heating of the pressurized liquid, thereby enabling rapid processing operations.

[0156] For example, when the workpiece is taken out in a heated state, in order to prevent burn accidents and minimize deformation of the workpiece, it is necessary to cool the workpiece before taking it out. However, it takes a long time to cool the pressurized liquid. Therefore, the pressurized liquid is cooled by operating the cooler 143 to cool the heat exchanger 130, so that the workpiece can be quickly taken out.

[0157] In addition, since the heat exchanger 130 can be heated or cooled by the heating and cooling supply part 140, the workpiece can be quickly cooled during heating such as quenching, or quickly heated during cooling for processing.

[0158] In addition, since the workpiece heated to a high temperature can be quickly cooled, the springback phenomenon generated in the workpiece heated to a high temperature can be suppressed.

[0159] On the other hand, when the pressure of the pressure vessel 110 increases due to the pressurized liquid, the bellows part 167 of the pressure equalizing regulating part 165 expands, and when the bellows part 167 expands, the insulating liquid flowing into the pressure chamber 166 is pressurized, so that the pressure of the motor housing part 160 also increases.

[0160] On the contrary, when the pressure of the pressure container 110 is reduced, the expanded bellows member 167 contracts again, and when the bellows member 167 contracts, the pressurizing force of the insulating liquid is reduced, so that the pressure of the motor accommodation portion 160 is also reduced.

[0161] As described above, since the pressure equalizing regulating part 165 can balance the pressure of the pressure container 110 and the motor housing part 160, it is possible to prevent the pressure difference from causing the seal 153 of the airtight motor shaft to be damaged, causing the pressurized liquid to flow into the motor housing part 160 and causing a short circuit accident of the circulation fan motor 151.

[0162] Therefore, the isostatic pressing device 100 that can quickly heat and cool through the pressurized liquid circulation fan 150 according to an embodiment of the present invention can not only circulate the pressurized liquid through the pressurized liquid circulation fan 150 to quickly heat or cool the pressurized liquid, thereby quickly performing the processing operation, but also maintain a constant temperature for a long time and process the workpiece to minimize the occurrence of processing defects, and can suppress the rebound phenomenon of returning to the original shape.

[0163] In addition, since the pressure equalizing regulator 165 increases or decreases the pressure of the motor housing 160 according to the pressure of the pressure container 110, damage to the shaft seal 153 caused by the pressure difference, which may cause the pressurized liquid to flow into the motor housing 160 and damage the circulation fan motor 151, can be prevented.

[0164] In addition, since the bellows part 167 for adjusting the pressure in the equalizing pressure regulating section 165 is formed of metal, damage can be minimized even under high-pressure pressure changes, and since the heat exchanger 130 is manufactured by overlapping multiple heat conducting plates 135, damage to the heat exchanger 130 according to the pressure of the pressure vessel 110 can be prevented.

[0165] In addition, since the circulation flow path 135 a of the pressurized liquid is formed by the bracket 170 , the occurrence of turbulence during circulation can be minimized, thereby quickly heating or cooling the pressurized fluid and maintaining a constant temperature throughout the interior of the pressure vessel 110 .

[0166] The embodiments of the present invention are described above, but the scope of the present invention is not limited thereto, and should include all changes and modifications that can be easily changed by a person skilled in the art through the embodiments of the present invention and that are considered equivalent.

Claims

1. An isostatic pressing apparatus capable of rapid heating and cooling by a pressurized fluid circulating fan, comprising: Pressure vessels, which use the pressure of pressurized liquid to pressurize and shape the workpiece; a heat exchanger disposed inside the pressure vessel and exchanging heat with the pressurized liquid to heat or cool the pressurized liquid; and a heating and cooling supply unit selectively heating or cooling a heat medium for heating or cooling the heat exchanger and supplying the heat medium to the heat exchanger, The isostatic pressing device is characterized by comprising: a pressurized liquid circulation fan, located inside the pressure vessel and circulating the pressurized liquid inside the pressure vessel; a circulation fan motor for rotating the pressurized liquid circulation fan; a motor housing portion separated from the pressure vessel to accommodate the circulation fan motor; and The pressure equalizing regulator increases or decreases the internal pressure of the motor accommodating portion according to the internal pressure of the pressure container, so as to prevent the pressurized liquid from leaking into the motor accommodating portion due to the pressure difference between the pressure container and the motor accommodating portion.

2. The isostatic pressing device capable of rapid heating and cooling by a pressurized liquid circulating fan according to claim 1, characterized in that The pressure equalizing regulating unit includes: The bellows component is located between the pressure container and the motor housing portion, and its volume increases or decreases according to the increase or decrease of the pressure of the pressure container to adjust the pressure of the motor housing portion.

3. The isostatic pressing device capable of rapid heating and cooling by a pressurized liquid circulating fan according to claim 2, characterized in that: The bellows member is formed by alternately joining inner circumferences and outer circumferences adjacent to each other in a stacked state of a plurality of annular plates formed of metal.

4. The isostatic pressing device capable of rapid heating and cooling by a pressurized liquid circulating fan according to claim 1, characterized in that: include: An insulating liquid is filled into the motor accommodation portion to easily change the internal pressure of the motor accommodation portion according to the operation of the pressure equalizing adjustment portion.

5. The isostatic pressing device capable of rapid heating and cooling by a pressurized liquid circulating fan according to claim 1, characterized in that: The heat exchanger is constructed by stacking a plurality of heat conducting plates forming medium flow channels and circulation flow channels, such that the medium flow channels through which the heat medium passes and the circulation flow channels through which the pressurized liquid passes are not connected to each other.

6. The isostatic pressing device capable of rapid heating and cooling by a pressurized liquid circulating fan according to claim 1, characterized in that The heat exchanger comprises: a central supply portion formed in the center of the heat exchanger, provided with the pressurized liquid circulation fan, and communicated with one end of the circulation flow channel to supply pressurized liquid from the circulation flow channel or to the circulation flow channel through the pressurized liquid circulation fan; and The supply portion is placed to connect the bracket and the other end of the circulation channel to supply the pressurized liquid passing through the circulation channel to the bracket on which the workpiece is placed, or to supply the pressurized liquid to the circulation channel via the bracket.

7. The isostatic pressing device capable of rapid heating and cooling by a pressurized liquid circulating fan according to claim 1, characterized in that include: a bracket for placing the workpiece to transport the workpiece into the pressure vessel or to remove the workpiece from the pressure vessel; The bracket includes: Inflow and outflow ports are formed at the upper and lower portions of the bracket, respectively, so that the pressurized liquid flows into and out of the bracket, so that the pressurized liquid forms an airflow that circulates the workpiece; as well as The bracket wall surrounds the inflow and outflow ports to separate the pressure container from a placement space for accommodating the workpiece.

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