JP6549515B2 - Device for manufacturing molded body and method for manufacturing molded body - Google Patents

Description

  The present invention relates to an apparatus for manufacturing a molded body and a method for manufacturing a molded body, which manufactures a molded body by pressurizing and heating a raw material contained in the inside of a mold.

  Conventionally, a hot press apparatus is widely used as a manufacturing apparatus for manufacturing a molded body or a sintered body. In a hot press, raw materials are accommodated inside a mold (upper mold and lower mold), and the temperature inside a heating furnace containing the mold is raised from normal temperature to a high temperature. The raw material contained in the inside of the mold is pressurized by pressurizing the mold in a high temperature state. By this, a compact is formed from the raw material. After forming the molded body, the temperature inside the heating furnace is lowered from high temperature to normal temperature. The mold is taken out from the heating furnace while the temperature inside the heating furnace is at normal temperature. In the conventional hot pressing apparatus, the temperature inside the heating furnace is raised from normal temperature to high temperature in order to carry out one molding process, and after the molding process, the temperature inside the heating furnace is lowered from high temperature to normal temperature. For this purpose, it takes time to raise and lower the temperature inside the heating furnace for one molding process. Therefore, there is a problem that the productivity of the hot press can not be improved.

  As a hot press apparatus capable of shortening the heat treatment time and shortening the cooling time, “The furnace body (32) of the pressure resistant structure provided in the press frame (31) and the heat insulation disposed in the furnace body The heating chamber (34) surrounded by the material wall and the powder raw material (35) supplied near the central part of the heating chamber are taken in and heated in the pressurized gas atmosphere (36) and the resistance heating device (37) A mold (38) for simultaneously heating and pressurizing to form a pressed material (35 '), a pressurized gas supply device (39) for supplying pressurized gas into the furnace body, and a heat insulating wall of a heating chamber A hot-pressing device provided with a lifting and closing device (44) for opening and closing the opening provided at the top and bottom of the furnace and a cooling fan (45) for cooling the furnace body and circulating pressurized gas (See, for example, paragraph [0007] of Patent Document 1 and FIG. .

Japanese Patent Laid-Open No. 2000-73106

  However, the conventional hot press apparatus disclosed in Patent Document 1 has the following problems. As shown in FIG. 1 of Patent Document 1, an electric heating device (36) and a resistance heating device (37) are used to heat a mold (38) which is a mold in the heating chamber (34). After heating and pressurization are completed, the heat generated in the heating chamber (34) is released into the furnace body (32) by opening the openings (42, 43) of the heating chamber (34). However, since the mold (38) is housed near the central portion of the heating chamber (34), the mold (38) is removed from the heating chamber (34) until the inside of the heating chamber (34) is cooled to normal temperature. There is a problem that it can not be taken out.

  The present invention solves the above-mentioned problems, and it is an object of the present invention to provide an apparatus for producing a molded product and a method for producing a molded product which can shorten a cooling time for cooling a mold and a molded product. .

In order to solve the above-mentioned subject, a manufacturing device of a forming object concerning the present invention is an outer shell part, a heating furnace provided in an inside of an outer shell part, a heating part provided in a heating furnace, and an inside of a heating furnace in a heating chamber which is heated by the heating unit is provided, a fixed plate provided inside the heating chamber, a passage formed at a position pair toward the stationary platen is provided on the outer wall of the furnace, through the passageway A movable plate capable of moving between the inside and the outside of the heating chamber, an arrangement region provided on the side of the movable plate and on which the molding die is placed, and a moving mechanism for moving the movable plate; Manufacturing apparatus for producing a molded body from the raw material, the first heat insulation member included in the fixed disc and provided on the opposite side of the passage in the fixed disc, and included in the fixed disc, the fixed disc attached to the first insulating member at the side of the passage in, move the movable platen A first heat conducting member having a length corresponding to the length of the heating chamber along a direction contained in the movable platen, a second insulation member provided so as to pair toward the first heat conducting member And pressing the raw material by pressing the mold placed in the arrangement area between the first heat conducting member and the second heat insulating member, and The heating of the raw material by the heating unit and the first heat conducting member is performed to manufacture a molded body, and the molded body is cooled outside the heating chamber.

Apparatus for producing a molded body according to the present invention is a manufacturing apparatus of the shaped body above, included in the movable platen, it is provided so as to pair toward the first heat conducting member, attached to the second heat insulating member And a second heat transfer member, wherein the pressing of the raw material by pressing the mold between the first heat transfer member and the second heat transfer member, the heating unit, and the second heat transfer member. A molded body is manufactured by performing heating with respect to the raw material by 1st heat conductive member and 2nd heat conductive member.

In order to solve the above-mentioned subject, the manufacturing device of the forming object concerning the present invention passes through the fixed board by which at least one copy was provided in the inside of a heating chamber, and the channel formed in the position which counters the fixed board. A movable plate capable of moving between the inside and the outside of the heating chamber, the fixed plate being attached to a first heat insulating member and the movable plate side of the first heat insulating member; And a first heat conducting member having a length corresponding to the length of the heating chamber along the moving direction of the movable plate, and accommodated in a mold disposed on the fixed plate side of the movable plate A raw material is sandwiched and heated and pressurized by the fixed plate and the movable plate in the heating chamber to form a molded body, and the movable plate is moved from the passage to the outside of the heating chamber to form the molded body. Are configured to be cooled .

  The apparatus for manufacturing a molded body according to the present invention further includes a pressure reducing mechanism for reducing the pressure in the heating chamber in the above-described apparatus for manufacturing a molded body.

Apparatus for producing a molded body according to the present invention is a manufacturing apparatus of the shaped body above, obtain further Bei a cooling mechanism provided outside the passing path.

  The apparatus for producing a molded article according to the present invention is the apparatus for producing a molded article described above, further comprising a gas supply mechanism for supplying an inert gas to the heating chamber, the mold contains a flammable material, and Heating as well as cooling of the shaped body takes place in a low oxygen atmosphere.

In order to solve the above-mentioned subject, the manufacturing method of the forming object concerning the present invention manufactures a forming object from the raw material stored in the inside of a forming die using the manufacturing apparatus of the above-mentioned forming object. a manufacturing method, through heating the interior of the pressurized hot chamber, and placing a mold raw material is accommodated in the movable platen, a step of opening the passage, the passage by moving the movable platen Moving the forming mold, storing the forming mold in the heating chamber, pressurizing the raw material by pressing the forming mold between the fixed platen and the movable platen, and heating the raw material inside the heating chamber When, and a step of cooling the molded body outside of the heating chamber, producing a molded body by carrying out a step of heating the step of pressing at the same time.

  According to the present invention, by cooling the mold outside the heating furnace, it is possible to shorten the cooling time for cooling the mold and the compact.

It is a schematic sectional drawing which shows the structure of the hot press which is a manufacturing apparatus of the molded object which concerns on this invention as a state in which the molding die was mounted in the movable board. It is a schematic sectional drawing which shows the structure of the shaping | molding die used in the hot-press apparatus shown by FIG. It is a top view which shows the outline | summary of the cooling device used in the hot press apparatus shown by FIG. In Example 1 of the hot press apparatus which concerns on this invention, it is a schematic sectional drawing which shows the state which mounted the shaping | molding die in the movable board. In Example 1 of the hot press apparatus which concerns on this invention, it is a schematic sectional drawing which shows the state which is pressurizing while heating a shaping | molding die with a heating furnace. In Example 1 of the hot press apparatus which concerns on this invention, it is a schematic sectional drawing which shows the state which is cooling the shaping | molding die using a cooling device. In Example 1 of the hot press apparatus based on this invention, it is principal part sectional drawing which shows the state which is heating the shaping | molding die with a heating furnace. In Example 2 of the hot press apparatus which concerns on this invention, it is a schematic sectional drawing which shows the state which mounted the shaping | molding die in the movable board. In Example 2 of the hot press apparatus which concerns on this invention, it is principal part sectional drawing which shows the state which is heating the shaping | molding die with a heating furnace. In Example 3 of the hot press apparatus which concerns on this invention, it is a schematic sectional drawing which shows the state which mounted the shaping | molding die in the movable board. In Example 3 of the hot press apparatus which concerns on this invention, it is a schematic sectional drawing which shows the state which is pre-heating a shaping | molding die with a preheating furnace. In Example 3 of the hot press apparatus which concerns on this invention, it is a schematic sectional drawing which shows the state which is pressurizing while heating a shaping | molding die with a heating furnace. In Example 3 of the hot press apparatus which concerns on this invention, it is a schematic sectional drawing which shows the state which is cooling the shaping | molding die using a cooling device. It is a schematic sectional drawing which shows the structure of the other shaping | molding die used in the hot press apparatus based on this invention.

  As shown in FIG. 5, the heating furnace 9 is provided inside the container 5, and the heating chamber 11 is provided inside the heating furnace 9. A fixed plate 14 is provided on the upper part of the heating furnace 9. The heat transfer member 15 and the heat insulating member 16 constitute a stationary platen 14. The heat conducting member 24 and the heat insulating member 25 constitute a movable platen 23. A passage 18 communicating with the heating chamber 11 is provided at a position opposite to the fixed plate 14 in the lower part of the heating furnace 9. The movable platen 23 moves to the heating chamber 11 through the passage 18 with the mold 8 placed on the heat conducting member 24 of the movable platen 23. The movable platen 23 on which the mold 8 is placed on the heat conducting member 24 moves to the heating chamber 11 through the passage 18. The forming die 8 is sandwiched between the fixed platen 14 and the movable platen 23, and is pressed and heated in the sandwiched state. The mold 8 is heated from both sides by the heat conduction from the heat conduction member 15 and the heat conduction member 24. The movable plate 23 moves to the outside of the heating furnace 9 through the passage 18. The mold 8 is cooled outside the heating furnace 9.

  EXAMPLE 1 Example 1 of the manufacturing apparatus of the molded object which concerns on this invention is demonstrated with reference to FIGS. A hot press apparatus will be described as an example of a manufacturing apparatus of a molded body. Any figure in the present application document is schematically drawn with omission or exaggeration, as appropriate, for the sake of clarity. About the same component, the same numerals are given and explanation is omitted suitably.

  The hot press 1 shown in FIG. 1 is a batch type hot press. In the hot press 1, four support members 3 are fixed to the four corners of the lower base 2. An upper base 4 opposite to the lower base 2 is fixed to the upper part of the four support members 3 extending upward. A container 5 is provided between the lower base 2 and the upper base 4. The container 5 constitutes the outer shell of the hot press 1. The container 5 is fixed to the lower base 2 by a plurality of support members 6a, and is fixed to the upper base 4 by a plurality of support members 6b.

  The configuration of the hot press apparatus may be other than the configuration shown in FIG. A frame-like member including a lower base, two wall-shaped members extending upward from both ends of the lower base, and an upper base connecting the upper portions of the two wall-shaped members may be used. The container 5 is fixed to the inside of the frame-like member. The moving mechanism is fixed to the upper part of the lower base.

A vacuum pump 7 for reducing the pressure inside the container 5 is connected to the container 5 via the pipe P1 and the on-off valve V1. A nitrogen gas supply machine G for supplying N ₂ gas into the interior of the container 5 is connected to the container 5 via the pipe P2 and the on-off valve V2. A door (not shown) for taking the mold 8 in and out of the interior of the container 5 is provided on the side wall of the container 5. For example, graphite (graphite) is preferably used as the material of the mold 8. Graphite made of carbon has high pressure resistance, high heat resistance, and high thermal conductivity.

  A heating furnace 9 is provided inside the container 5. The heating furnace 9 is constituted by a heat insulating material wall 10. A heating chamber 11 is provided inside the heating furnace 9. As a material of the heat insulating material wall 10, it is preferable to use a ceramic fiber having a large heat insulating effect in a high temperature state. As a heating unit for heating the inside of the heating chamber 11, for example, a resistance heating type heater 12 is provided so as to surround the periphery of the heating chamber 11. It is preferable to use a heater having a large watt density so that the heater 12 can heat the inside of the heating chamber 11 to a predetermined temperature in a short time. The heater 12 can be used to raise the temperature inside the heating chamber 11 to about 1000 ° C. in a short time.

  As shown in FIG. 1, in the hot press 1, an upper ram 13 extending downward from the upper base 4 is provided. As a material of the upper ram 13, it is preferable to use a heat resistant steel or the like that can maintain high strength in a high temperature state. A fixed board 14 is attached to the end of the upper ram 13. The fixed platen 14 has a heat conducting member 15 and a heat insulating member 16. The fixed platen 14 is attached to the lower part of the upper ram 13. Specifically, the heat insulating member 16 is attached to the lower part of the upper ram 13, and the heat conducting member 15 is attached to the lower part of the heat insulating member 16.

  It is preferable to use a material having high pressure resistance, high resistance to thermal shock, and high thermal conductivity as the material of the heat conducting member 15. The heat conducting member 15 can withstand a pressing force of 10 t when pressing the mold 8. The heat conducting member 15 can withstand the rapid temperature rise and the rapid temperature drop when the inside of the heating chamber 11 thermally reciprocates between the normal temperature state and the high temperature state. The heat conducting member 15 can accumulate radiant heat from the heater 12 and can conduct the accumulated heat to the mold 8.

  As a material of the heat insulating member 16, it is preferable to use a material having high pressure resistance, high resistance to thermal shock, and low heat conductivity. The heat insulating member 16 can withstand a pressing force of 10 t when pressing the mold 8. The heat insulating member 16 can withstand rapid temperature rise and rapid temperature drop in the case where the inside of the heating chamber 11 thermally reciprocates between the normal temperature state and the high temperature state. The heat insulating member 16 can suppress the heat stored in the heat conducting member 15 from being released to the outside.

  As shown in FIG. 1, the heat conducting member 15 is disposed inside the heating chamber 11. The heat insulating member 16 is inserted into a through hole formed in the upper portion of the heat insulating material wall 10 constituting the heating furnace 9. The heat insulating member 16 is attached to the lower portion of the upper ram 13. In other words, the heat insulating member 16 constitutes a portion of the upper portion of the heat insulating material wall 10 of the heating furnace 9. The top of the heating chamber 11 is thermally isolated from the space above the heating furnace 9 by the heat insulating material wall 10 and the heat insulating member 16.

  The upper ram 13 and the fixed board 14 (including the heat insulating member 16 and the heat conducting member 15) are integrated. As a result, the upper ram 13 and the fixed plate 14 function as an upper ram (in a broad sense) in the hot press 1.

A gas supply mechanism 17 for supplying an inert gas to the heating chamber 11 is connected to the heating chamber 11 via the pipe P3 and the on-off valve V3. By supplying the inert gas, the inside of the heating chamber 11 is made into an inert gas rich atmosphere (in other words, a low oxygen atmosphere). Nitrogen (N ₂ ), argon (Ar) or helium (He) is used as inert gas. Graphite constituting the mold 8 is a flammable material. Therefore, an inert gas is supplied to the heating chamber 11 to prevent the graphite from burning in a high temperature state. In the case where the gas is supplied to the space inside the container 5 and the space inside the heating chamber 11, a path for discharging the gas from the space is necessary. These paths are not shown in order to avoid complication of the figure.

  In the lower part of the heating furnace 9, a passage 18 is provided at a position opposite to the fixed plate 14 provided on the upper part of the heating furnace 9 in plan view (viewed along the Z direction in FIG. 1). The mold 8 moves through the passage 18 between the lower part of the heating furnace 9 and the inside of the heating chamber 11. Specifically, the forming die 8 is moved from the lower side (lower side) of the heating furnace 9 through the passage 18 to the inside of the heating furnace 9 and accommodated in the heating chamber 11.

  Below the passage 18, a shutter 19 for opening and closing the passage 18 is provided. The shutter 19 is preferably configured by a heat insulating member having a small thermal conductivity so as to suppress the heat heated by the heater 12 from being released from the heating chamber 11 to the outside. The shutter 19 is advanced and retracted in the X direction below the passage 18 by the opening and closing mechanism 20. The shutter 19 makes the structure of the heating furnace 9 a structure in which the heat accumulated in the heating chamber 11 is not easily released to the outside.

  The shutter 19 may be accommodated in a recess provided in the lower portion inside the side wall of the heating furnace 9. The shutter 19 is connected to a rod capable of advancing and retracting. The rod is fitted into a through hole provided at the lower portion inside the side wall. It is preferred that the appropriate insulation be used to close the gap between the through hole and the rod. The rod advances and retracts by the operation of an actuator provided on the outer side of the side wall. The shutter 19 moves upward of the passage 18 and closes the passage 18 by the operation of the actuator projecting. The shutter 19 moves from above the passage 18 to a recess provided in the lower portion inside the side wall of the heating furnace 9 by the operation of retraction of the actuator. Thus, the shutter 19 opens the passage 18.

  The lower base 2 is provided with a drive mechanism 21 for moving the mold 8 up and down and pressing the mold 8. As the drive mechanism 21, a hydraulic cylinder, a combination of a servomotor and a ball screw, a combination of a servomotor, a ball screw and a toggle mechanism, or the like is used. The lower ram 22 is raised and lowered by the drive mechanism 21. As a material of the lower ram 22, it is preferable to use a heat resistant steel or the like which can maintain its strength in a high temperature state. The movable plate 23 is connected to the end of the lower ram 22. The movable board 23 has a heat conducting member 24 and a heat insulating member 25. The movable board 23 moves up and down together with the lower ram 22. The movable board 23 can move between the inside of the heating chamber 11 and the inside of the container 5 outside the heating chamber 11 via the passage 18 of the heating furnace 9.

  It is preferable to use a material having high pressure resistance, high resistance to thermal shock, and high thermal conductivity as the material of the heat conducting member 24. The heat conducting member 24 can withstand a pressing force of 10 t when pressing the mold 8. The heat conducting member 24 can withstand the rapid temperature rise and the rapid temperature drop when the inside of the heating chamber 11 thermally reciprocates between the normal temperature state and the high temperature state. The heat conducting member 24 can accumulate radiant heat from the heater 12 and can conduct the accumulated heat to the mold 8.

  As a material of the heat insulating member 25, it is preferable to use a material having high pressure resistance, high resistance to thermal shock, and low heat conductivity. The heat insulating member 25 can withstand a pressing force of 10 t when pressing the mold 8. The heat insulating member 25 can withstand rapid temperature rise and rapid temperature drop when the inside of the heating chamber 11 thermally reciprocates between the normal temperature state and the high temperature state. The heat insulating member 25 can suppress the heat stored in the heat conducting member 24 from being released to the outside of the heating chamber 11.

  The lower ram 22 and the movable plate 23 (including the heat conducting member 24 and the heat insulating member 25) are integrated. By this, the lower ram 22 and the movable plate 23 function as a lower ram (in a broad sense) in the hot press device 1.

  A forming die 8 for forming a formed body is placed on the movable plate 23. The upper surface of the movable platen 23 constitutes an arrangement area 23 a in which the molding die 8 is arranged. Therefore, the mold 8 is placed on the upper surface of the movable platen 23 which is the arrangement area 23 a of the movable platen 23. In the first embodiment, the upper surface of the heat transfer member 24 constituting the movable plate 23 constitutes the arrangement area 23 a of the movable plate 23.

  The mold 8 used in the hot press 1 shown in FIG. 1 will be described with reference to FIG. The mold 8 has, for example, a frame member 26 having a through hole, and a lower die 27 and an upper die 28 inserted into the through hole of the frame member 26. The lower mold 27 and the upper mold 28 slide along the inner wall surface of the frame member 26. For example, graphite (graphite) is used as a material of the frame member 26, the lower mold 27 and the upper mold 28.

  In a space surrounded by the frame member 26 and the lower die 27, a raw material 29 for forming a molded body is accommodated. Ceramic materials, metal materials and the like are used as the raw materials 29. As the raw material 29, a mixed material containing a ceramic material and a metal material may be used. The upper mold 28 is inserted into the through hole of the frame member 26 in a state where the raw material 29 is accommodated in the space surrounded by the frame member 26 and the lower mold 27. In this state, the raw material 29 sandwiched between the lower mold 27 and the upper mold 28 is pressurized.

  In FIG. 2, the frame member 26 and the lower die 27 are individually configured. Not limited to this, the frame member 26 and the lower mold 27 can be integrally configured. In this case, the frame member 26 and the lower die 27 constitute a concave member. The upper mold 28 is inserted into a space (concave portion) surrounded by the frame member 26 and the lower mold 27. Only the upper die 28 slides along the inner wall surface of the frame member 26.

As shown in FIG. 1, a cooling device 30 for cooling a mold 8 taken out of the heating furnace 9 is provided below the heating furnace 9 in the hot press 1. As shown in FIGS. 1 and 3, the cooling device 30 has, for example, a cooling ring 31 that blows a cooling gas toward the mold 8. The cooling ring 31 is connected to the cooling device 30 via the pipe P4 and the on-off valve V4. The cooling ring 31 is provided to surround the periphery of the mold 8 taken out of the heating furnace 9. Inside the cooling ring 31, a large number of gas supply holes 32 for blowing a cooling gas toward the mold 8 are provided. It is preferable to use N ₂ gas, Ar gas, He gas or the like as the cooling gas. He gas has larger thermal conductivity than N ₂ gas and Ar gas. Therefore, the mold 8 can be cooled more quickly by using He gas as the cooling gas.

  With reference to FIG. 7, the state in which the mold 8 accommodated in the heating chamber 11 in the first embodiment is heated and pressurized will be described. As shown in FIG. 7, the heating chamber 11 has a space of length L along the Z direction (the direction in which the movable platen 23 and the mold 8 move). The fixed platen 14 is composed of a heat conducting member 15 having a thickness of t1 and a heat insulating member 16 having a thickness of t2. The movable platen 23 is constituted of a heat conducting member 24 having a thickness of t1 and a heat insulating member 25 having a thickness of t2. The mold 8 has a thickness of t3. The upper and lower walls of the heat insulating material wall 10 constituting the heating furnace 9 have a thickness of t2.

  The total thickness of the thickness t1 of the heat conducting member 15, the thickness t3 of the mold 8, and the thickness t1 of the heat conducting member 24 is substantially equal to the length L of the heating chamber 11, respectively. Is set. That is, the total thickness of the thickness t1 of the heat conducting member 15, the thickness t3 of the mold 8 and the thickness t1 of the heat conducting member 24 is set to be L = 2 · t1 + t3. The thickness t2 of the heat insulating member 16 constituting the fixed platen 14 and the thickness t2 of the heat insulating member 25 constituting the movable platen 23 are respectively the thickness t2 of the upper wall and the thickness t2 of the lower wall constituting the heat insulating material wall 10 It may be set to be equal to

  In the state where the mold 8 is accommodated in the heating chamber 11, the heat conducting member 15, the mold 8 and the heat conducting member 24 are disposed inside the heating chamber 11. The heating chamber 11 is covered with the heat insulating material wall 10 constituting the heating furnace 9, the heat insulating member 16 constituting the fixed platen 14, and the heat insulating member 25 constituting the movable platen 23. Therefore, the inside of the heating chamber 11 is thermally shut off from the outside of the heating furnace 9 by the respective heat insulating members.

  The heating chamber 11 is covered with the heat insulating material wall 10 constituting the heating furnace 9, the heat insulating member 16 constituting the fixed platen 14, and the heat insulating member 25 constituting the movable platen 23. This suppresses the heat accumulated in the heating chamber 11 from being released to the outside. In other words, the heat obtained by the heater 12 is used with high efficiency to heat the mold 8. Since the heat loss in the heating chamber 11 is suppressed, the time for raising the temperature inside the heating chamber 11 is shortened.

  By providing the heat insulating member 16 between the upper ram 13 and the heat conducting member 15, the heat accumulated in the heating chamber 11 is suppressed from being released to the outside. By providing the heat insulating member 25 between the lower ram 22 and the heat conducting member 24, the heat accumulated in the heating chamber 11 is suppressed from being released to the outside. Therefore, it is suppressed that the temperature of components, such as the upper ram 13, the lower ram 22, and the container 5, rises.

  With reference to FIGS. 4-7, the process of heating and pressurizing the raw material 29 accommodated in the shaping | molding die 8 in the hot press 1 which concerns on this invention is demonstrated.

  First, the door (not shown) of the container 5 provided in the hot press 1 is opened. As shown in FIG. 4, the mold 8 containing the powdered raw material 29 (see FIG. 2) is placed on the movable plate 23. Therefore, the mold 8 is placed on the upper surface of the heat transfer member 24. After the mold 8 is placed on the movable plate 23, the door of the container 5 is closed.

Next, the inside of the container 5 is depressurized using the vacuum pump 7. Thereafter, for example, N ₂ gas is supplied to the heating chamber 11 using the gas supply mechanism 17. In this state, the passage 18 of the heating furnace 9 is closed by the shutter 19. By supplying N ₂ gas, the inside of the heating chamber 11 is put in a low oxygen atmosphere.

  Next, as shown in FIG. 5, the passage 18 of the heating furnace 9 is opened by moving the shutter 19 in the + X direction using the opening / closing mechanism 20. The movable plate 23 is raised using the drive mechanism 21. By raising the movable plate 23, the mold 8 is accommodated inside the heating chamber 11 through the passage 18. By further raising the movable plate 23, the forming die 8 is sandwiched between the fixed plate 14 and the movable plate 23 inside the heating chamber 11. In this state, as shown in FIG. 5, the sum of the length of the heat conducting member 15 constituting the fixed plate 14, the thickness of the mold 8 and the length of the heat conducting member 24 constituting the movable plate 23 in the Z direction. Are arranged to correspond to the length of the heating chamber 11. In other words, the hot press 1 is configured such that the length from the upper surface of the heat transfer member 15 to the lower surface of the heat transfer member 24 in the Z direction via the mold 8 is equal to the length of the heating chamber 11 Be done.

  In the present application, the phrase "equal in length" includes cases where there is a certain difference in length except when the lengths are exactly equal. For example, the phrase "the length from the upper surface of the heat transfer member 15 to the lower surface of the heat transfer member 24 via the mold 8 is equal to the length of the heating chamber 11" means that the lower surface of the heat transfer member 24 is the heating chamber The case where it is located under 11 and within the range of the thickness of the lower wall of the heating furnace 9 is included.

  Next, the step of heating the mold 8 is performed. A voltage is applied to the heater 12. The heating chamber 11 is heated by the heat generated by the heater 12. As shown in FIG. 7, in the heating chamber 11, the heat conduction member 15 constituting the fixed board 14 and the heat conduction member 24 constituting the movable board 23 are heated from the peripheral portion by the radiant heat 33 received from the heater 12. . The heat conducting member 15 and the heat conducting member 24 have high thermal conductivity. Therefore, the entire region of the heat conducting member 15 and the heat conducting member 24 is rapidly heated from the peripheral portion of the heat conducting member 15 and the heat conducting member 24 toward the central portion. Finally, the entire area of the heat transfer member 15 and the heat transfer member 24 is uniformly heated to a predetermined temperature.

  In the step of heating the mold 8, the heat conduction 34 transmitted from the heat conduction member 15 and the heat conduction member 24 uniformly heated in a low oxygen atmosphere uniformly molds from both surfaces (upper and lower surfaces) of the mold 8. The mold 8 is heated. Therefore, a large temperature difference does not occur between the peripheral portion and the central portion of the mold 8. By this, the raw material 29 accommodated between the lower mold 27 and the upper mold 28 constituting the mold 8 is uniformly heated (see FIG. 2). Even when the planar area of the mold 8 is large, a large temperature difference does not occur between the peripheral portion and the central portion of the mold 8, so the raw material 29 accommodated in the mold 8 is uniformly heated.

  In the step of heating the mold 8, the heating chamber 11 is heated to a predetermined temperature, for example, 800.degree. Since the inside of the heating chamber 11 is thermally shut off from the outside of the heating furnace 9 by the heat insulating member, the time for raising the temperature inside the heating chamber 11 to a predetermined temperature is shortened.

  As shown in FIG. 5, by raising the temperature inside the heating chamber 11 to a predetermined temperature and maintaining the temperature, the mold 8 is heated for a predetermined time. Thereafter, the movable plate 23 is further raised using the drive mechanism 21 to set the pressure for pressing the mold 8 to a predetermined pressure. The mold 8 is pressurized by maintaining the predetermined pressure. As a result, the raw material 29 contained between the upper mold 28 and the lower mold 27 constituting the mold 8 is heated while being pressurized. By heating the mold 8 while being pressurized at a predetermined temperature for a predetermined time, the raw material 29 accommodated in the mold 8 is molded. The raw material 29 accommodated in the shaping | molding die 8 is sintered by the process to this, and a molded object (sintered body) is shape | molded.

  Next, after molding is completed, the passage 18 is opened by moving the shutter 19 in the + X direction using the opening and closing mechanism 20. As shown in FIG. 6, the mold 8 is taken out of the heating furnace 9 by lowering the movable plate 23 using the drive mechanism 21. The movable platen 23 is further lowered to stop the mold 8 at the position where the cooling ring 31 is provided.

  Next, after the mold 8 is taken out of the heating furnace 9, the passage 18 is closed by moving the shutter 19 in the -X direction using the opening and closing mechanism 20. By closing the passage 18, the heat of the heating chamber 11 is suppressed from being released to the inside of the container 5. First of all, a decrease in the temperature inside the heating chamber 11 is suppressed. Secondly, the temperature rise of the components provided inside the container 5 and the container 5 is suppressed.

Next, a cooling device 30 is used to spray a cooling gas from the gas supply holes 32 of the cooling ring 31 toward the mold 8. N ₂ gas, Ar gas or He gas is used as a cooling gas. As shown in FIG. 3, the mold 8 can be rapidly cooled by blowing a cooling gas from the periphery of the mold 8 to the entire mold 8. He gas has larger thermal conductivity than N ₂ gas and Ar gas. Thus, by using He gas, the mold 8 is cooled faster. The cooling gas may be previously cooled. This further reduces the time to cool the mold 8.

Next, when the temperature of the mold 8 is lowered to the normal temperature by the cooling device 30, the operation of the vacuum pump 7 is stopped. Thereafter, a nitrogen gas supply device G is used to supply N ₂ gas to the inside of the container 5. The inside of the container 5 is filled with N ₂ gas. When the pressure inside the container 5 becomes equal to the atmospheric pressure, the door (not shown) is opened to take out the mold 8 at normal temperature from the container 5. By the steps up to this point, the molded body formed inside the mold 8 can be removed from the mold 8.

  According to the present embodiment, the fixing board 14 is configured by the heat conducting member 15 and the heat insulating member 16. The heat conducting member 24 and the heat insulating member 25 constitute a movable platen 23. In the heating chamber 11, the mold 8 is heated in a state in which the mold 8 is sandwiched between the heat conducting member 15 constituting the fixed platen 14 and the heat conducting member 24 constituting the movable platen 23. Since the heat conducting member has a large thermal conductivity, the entire region of the mold 8 is uniformly heated from the peripheral portion to the central portion of the heat conducting member 15 and the heat conducting member 24. Therefore, the mold 8 is uniformly heated from both sides by the heat conduction 34 transmitted from the heat conduction member 15 and the heat conduction member 24.

  According to the present embodiment, the heating chamber from the outside of the heating furnace 9 by the heat insulating material wall 10 constituting the heating furnace 9, the heat insulating member 16 constituting the fixed plate 14 and the heat insulating member 25 constituting the movable plate 23. Thermally shut off the inside of 11. By this, when heating the shaping | molding die 8 in the heating chamber 11, it is suppressed that the heat | fever accumulate | stored in the heating chamber 11 is released outside. Therefore, the heat obtained by the heater 12 is efficiently used to heat the mold 8. Since the heat loss when heating the mold 8 is suppressed, the time for raising the temperature inside the heating chamber 11 is shortened.

  According to this embodiment, the heat insulating member 16 is provided between the upper ram 13 and the heat conducting member 15. A heat insulating member 25 is provided between the lower ram 22 and the heat conducting member 24. As a result, the heat accumulated in the heating chamber 11 is suppressed from being released to the outside. Therefore, the temperature rise of the upper ram 13, the lower ram 22, the container 5, the other components, etc. is suppressed.

  According to this embodiment, after the heat treatment in the heating furnace 9 is completed, the mold 8 is moved from the heating furnace 9 to the inside of the container 5 outside the heating furnace 9. After closing the passage 18 using the shutter 19, a cooling device 30 is used to forcibly cool the mold 8 inside the container 5. As a result, the forming die 8 is cooled to normal temperature in a short time in the outside of the heating furnace 9 and in the inside of the container 5. The mold 8 cooled to room temperature is taken out of the container 5. Therefore, in one molding process, the time to lower the temperature of the mold 8 from high temperature to normal temperature can be shortened. Therefore, the productivity of the hot press 1 can be improved.

  In the present embodiment, after the forming die 8 is accommodated in the heating chamber 11, the heating chamber 11 is heated by the heater 12. Not limited to this, the temperature inside the heating chamber 11 may be raised to a predetermined temperature before the molding die 8 is accommodated in the heating chamber 11. In this case, the time for heating the heating chamber 11 for each molding process is unnecessary. Therefore, the productivity of the hot press 1 can be further improved.

  In Example 1, the cooling device 30 which sprays the gas for cooling toward the shaping | molding die 8 was shown. Not limited to this, a cooling body capable of causing a liquid or gas refrigerant to flow through a pipe provided inside a member made of metal or the like may be used as a cooling device. In this case, the mold 8 is forcedly cooled by bringing the mold 8 into contact with the cooled body. The mold 8 is cooled by utilizing the heat conduction from the mold 8 to the cooling body.

  A cooling body consisting of a member (such as a metal block) to be cooled using a Peltier element, a suitable refrigerant or the like instead of the gas for cooling is placed under the heating furnace 9 and weighted in the passage 18 in plan view It may be provided at a position where the The mold 8 is pushed from above the movable plate 23 onto the cooling body by a suitable transfer mechanism, for example, a pushing mechanism. As a result, the mold 8 is transferred from above the movable plate 23 onto the cooling body, and the mold 8 is forcibly cooled. According to this configuration, the new mold 8 placed on the movable plate 23 is accommodated inside the heating chamber 11 through the passage 18 while cooling the heated and pressurized mold 8. be able to. In this case, the step of cooling the heated and pressurized forming die 8 and the step of heating and pressurizing the raw material 29 accommodated in the inside of the die 8 proceed simultaneously. Therefore, the process of heating and pressurizing the raw material 29 accommodated inside the mold 8 is efficiently performed.

  The cooling of the mold 8 is not limited to forced cooling using a gas for cooling, a refrigerant, a Peltier element or the like. Cooling of the mold 8 may be performed by leaving the mold 8 transferred on a metal block or the like. According to this configuration, the mold 8 subjected to the heating and pressure treatment is naturally cooled. Therefore, the power consumption of the hot press 1 is reduced. The cooling body may be provided at a position below the heating furnace 9 and not overlapping the passage 18 in plan view.

  According to this embodiment, after raising the temperature inside the heating chamber 11 to a predetermined temperature, the pressing of the mold 8 is started. Not limited to this, the molding die 8 may be accommodated inside the heating chamber 11 and the pressing of the molding die 8 may be started almost simultaneously with the start of raising the temperature inside the heating chamber 11. After raising the temperature inside the heating chamber 11 to a predetermined temperature while pressurizing the mold 8, the state (the state where the mold 8 is heated while being pressurized) is maintained for a fixed time. In this case, it is preferable to previously determine the temperature profile when raising the temperature inside the heating chamber 11 and the time for which the predetermined temperature is maintained, by experiment or the like. The same applies to the other embodiments. By the method described so far, the time to form a compact from the raw material 29 is further shortened.

  A second embodiment of the hot press apparatus 1 which is a manufacturing apparatus according to the present invention will be described with reference to FIGS. 8 to 9. The difference with respect to the first embodiment is that, firstly, the thickness (length in the Z direction) of the heat conducting member 15 constituting the stationary platen 14 is equal to the length L in the Z direction of the space of the heating chamber 11. Secondly, the movable platen 23 is mainly configured by the heat insulating member 25. The other configuration is the same as that of the first embodiment. In the second embodiment (FIG. 8), the on-off valve is omitted for the sake of convenience.

  As an aspect in which the movable board 23 is mainly configured by the heat insulating member 25, first, there is an aspect in which the movable board 23 is configured only by the heat insulating member 25. Second, there is a mode in which a thin heat conducting member is provided at the top of the movable platen 23 and the heat conducting member and the mold 8 are accommodated in the lowermost part of the heating chamber 11.

  As shown in FIG. 8, the stationary platen 14 is configured of a heat conducting member 15 and a heat insulating member 16. The movable board 23 is constituted only by the heat insulating member 25. The inside of the heating chamber 11 is configured such that the thickness (length) of the heat conducting member 15 constituting the fixed platen 14 is equal to the length L of the heating chamber 11.

  As shown in FIG. 9, the heating chamber 11 has a space of length L along the Z direction. The fixed platen 14 is composed of a heat conducting member 15 having a thickness t4 and a heat insulating member 16 having a thickness t2. The movable platen 23 is constituted only by the heat insulating member 25 having a thickness t2. The mold 8 has a thickness t3. The upper wall of the heat insulating material wall 10 constituting the heating furnace 9 has a thickness t2, and the lower wall has a thickness t5.

  The thickness t 4 of the heat conducting member 15 constituting the fixed platen 14 is equal to the length L of the heating chamber 11. That is, the heating chamber 11 is set such that L = t4. The thickness t2 of the heat insulating member 16 constituting the fixed platen 14 is set to be equal to the thickness t2 of the upper wall constituting the heat insulating material wall 10. The thickness t5 of the lower wall constituting the heat insulating material wall 10 is set to be equal to the sum of the thickness t2 of the heat insulating member 25 constituting the movable platen 23 and the thickness t3 of the forming die 8.

  In the state where the mold 8 is housed in the heating furnace 9, only the heat conducting member 15 is disposed inside the heating chamber 11. The heating chamber 11 is covered with the heat insulating material wall 10 constituting the heating furnace 9, the heat insulating member 16 constituting the fixed platen 14, and the heat insulating member 25 constituting the movable platen 23. Therefore, the inside of the heating chamber 11 is thermally shut off from the outside of the heating furnace 9 by the respective heat insulating members.

  With reference to FIG. 9, the process of containing the forming die 8 in the heating furnace 9 and heating it in Example 2 is demonstrated. Unlike the first embodiment, a case where the heating chamber 11 is heated to a predetermined temperature in advance before the forming die 8 is accommodated in the heating furnace 9 will be described.

  First, a voltage is applied to the heater 12. By this, the temperature inside the heating chamber 11 is raised to a predetermined temperature, for example, 800.degree. By the radiant heat 33 from the heater 12, the whole of the heat conduction member 15 which comprises the fixed board 14 is heated from a peripheral part. Since the heat conducting member 15 has a large heat conductivity, the whole of the heat conducting member 15 having the length L is heated from the peripheral portion to the central portion of the heat conducting member 15 to become a uniform predetermined temperature. . The heat conducting member 15 maintains a heated state at a predetermined temperature (800 ° C.). In other words, the heat conducting member 15 uniformly accumulates the heat obtained from the heater 12 along the length direction. As shown in FIG. 8, the passage 18 of the heating furnace 9 is closed by the shutter 19 in this state.

  Next, the passage 18 is opened by moving the shutter 19 in the + X direction using the open / close mechanism 20. The mold 8 is accommodated inside the heating furnace 9 through the passage 18. As shown in FIG. 9, the mold 8 is sandwiched between the heat conducting member 15 constituting the fixed platen 14 and the heat insulating member 25 constituting the movable platen 23. Since the heat conducting member 15 is uniformly heated to a predetermined temperature, the heat accumulated in the heat conducting member 15 is rapidly and uniformly transmitted to the mold 8 by the heat conduction 34. By this, the shaping | molding die 8 can be uniformly heated to predetermined | prescribed temperature.

  The heating chamber 11 is covered with the heat insulating material wall 10 constituting the heating furnace 9, the heat insulating member 16 constituting the fixed platen 14, and the heat insulating member 25 constituting the movable platen 23. This suppresses the heat stored in the heat conducting member 15 from being released to the outside. In other words, the heat stored in the heat conducting member 15 is efficiently used to heat the mold 8. Since the heat loss of the heat conducting member 15 is suppressed, the time for heating the mold 8 can be shortened. The steps after heating the mold 8 are the same as in the first embodiment, so the description will be omitted. The cooling device 30 has the same configuration as the configuration described in the first embodiment.

  According to the present embodiment, the length t4 of the heat conducting member 15 constituting the fixed platen 14 is set to be equal to the length L of the heating chamber 11. First of all, the heat capacity of the heat conducting member 15 can be increased. Second, the heat obtained from the heater 12 can be uniformly accumulated throughout the length direction of the heat conducting member 15. Therefore, the heat stored in the heat conducting member 15 can be uniformly and quickly transferred to the mold 8 by the heat conduction 34. By this, it is possible to uniformly heat the mold 8 to a predetermined temperature in a short time.

  According to the present embodiment, the heating chamber from the outside of the heating furnace 9 by the heat insulating material wall 10 constituting the heating furnace 9, the heat insulating member 16 constituting the fixed plate 14 and the heat insulating member 25 constituting the movable plate 23. The inside of 11 is thermally shut off. By this, when heating the shaping | molding die 8 in the heating furnace 9, it is suppressed that the heat | fever accumulate | stored in the heat conductive member 15 is discharge | released outside. Therefore, the heat obtained by the heater 12 is efficiently used to heat the mold 8. Since the heat loss when heating the mold 8 is suppressed, the time for heating the mold 8 is shortened.

  In the present embodiment, the length t4 of the heat conducting member 15 constituting the fixed platen 14 is made to coincide with the length L of the heating chamber 11. Not limited to this, the length t4 of the heat conducting member 15 can be set shorter by the thickness t3 of the mold 8. That is, t4 = L-t3. In this case, the heat conducting member 15 and the forming die 8 which constitute the fixed platen 14 are disposed inside the heating chamber 11. In this case, the mold 8 receives the heat conduction 34 by the heat conduction member 15 on the upper surface and the radiant heat 33 from the heater 12 on the side surface. The thickness of the heat insulating material wall 10 which comprises the heating furnace 9 can be set to the thickness of t2 similarly to Example 1 with an upper wall and a lower wall.

  A third embodiment of the hot press device according to the present invention will be described with reference to FIGS. 10 to 13. The difference from the first and second embodiments is that a heating furnace and a preheating furnace are provided inside the container 5. The other configuration is basically the same as in the first and second embodiments. In addition, in Example 3 (FIGS. 10-13), illustration of an on-off valve is abbreviate | omitted for convenience.

  As shown in FIG. 10, the hot press device 35 has a heating furnace 36 and a preheating furnace 37 inside the container 5. The heating furnace 36 is disposed above the preheating furnace 37 so as to overlap the preheating furnace 37 in plan view. The heating furnace 36 has a heating chamber 38 inside. The preheating furnace 37 has a preheating chamber 39 inside.

  The heating furnace 36 has the same configuration as the heating furnace 9 shown in the first embodiment. As shown in FIG. 10, a stationary platen 14 is provided at the top of the heating furnace 36. In the lower part of the heating furnace 36, a passage 18a is provided at a position facing the stationary platen 14 in plan view. A heater 12 a is provided around the heating chamber 38. A gas supply mechanism 17a for supplying an inert gas to the heating chamber 38 is connected to the heating chamber 38 via a pipe and an on-off valve. The temperature inside the heating chamber 38 can be raised to about 1000 ° C. by the heater 12 a. Below the heating furnace 36, a shutter 19a for opening and closing the passage 18a and an opening and closing mechanism 20a are provided.

  A passage 18 b is provided at the top of the preheating furnace 37. A passage 18 c is provided at a lower part of the preheating furnace 37 so as to face the passage 18 b in plan view. A heater 12 b is provided around the preheating chamber 38. A gas supply mechanism 17 b for supplying an inert gas to the preheating chamber 39 is connected to the preheating chamber 39 via a pipe and an on-off valve. The temperature inside the preheating chamber 39 can be raised to about 500 ° C. by the heater 12 b. Above the preheating furnace 37, a shutter 19b for opening and closing the passage 18b and an opening / closing mechanism 20b are provided. Below the preheating furnace 37, a shutter 19c for opening and closing the passage 18c and an opening and closing mechanism 20c are provided.

  Similar to the first embodiment, the stationary platen 14 has a heat conducting member 15 and a heat insulating member 16. The movable board 23 has a heat conducting member 24 and a heat insulating member 25. The movable platen 23 is accommodated inside the preheating chamber 39 through the passage 18 c of the preheating furnace 37. The movable platen 23 is accommodated inside the heating chamber 38 through the passage 18 b of the preheating furnace 37 and the passage 18 a of the heating furnace 36. The movable board 23 moves between the inside of the heating chamber 38 and the inside of the preheating chamber 39, and the outside of the heating chamber 38 and the outside of the preheating chamber 39 and the inside of the container 5. Inside the container 5, the fixed plate 14, the passage 18a, the passage 18b, the passage 18c, and the movable plate 23 are provided to overlap in plan view. Among the configurations described in the first embodiment, the cooling device 30 illustrated in FIG. 10 has a configuration that uses heat conduction from the mold 8 to the cooling body 40. Not limited to this, the cooling device 30 may be configured to spray a cooling gas onto the forming die 8 as in the first embodiment.

  The steps of preheating and heating and pressurizing the raw material 29 (see FIG. 2) accommodated in the mold 8 in the hot press device 35 according to the present invention will be described with reference to FIGS.

  First, as shown in FIG. 10, the mold 8 containing the raw material 29 is placed on the movable plate 23. In this case, the upper surface of the heat conducting member 24 constituting the movable plate 23 constitutes the arrangement area 23 a of the movable plate 23. Therefore, the mold 8 is placed on the upper surface of the heat transfer member 24.

  Next, as shown in FIG. 11, the passage 18c provided in the lower part of the preheating furnace 37 is opened by moving the shutter 19c in the + X direction using the opening / closing mechanism 20c. The movable plate 23 is raised using the drive mechanism 21. By raising the movable plate 23, the mold 8 is accommodated inside the preheating chamber 39 through the passage 18c. The passage 18b provided in the upper part of the preheating furnace 37 is previously closed by the shutter 19b.

  In the present embodiment, a case will be described in which the temperature inside the preheating chamber 39 and the temperature inside the heating chamber 38 are each raised to a predetermined temperature. For example, by applying a voltage to the heater 12b, the temperature inside the preheating chamber 39 is raised beforehand to 400.degree. In the preheating chamber 39, the mold 8 is preheated by the radiation heat from the heater 12b and the heat conduction from the heat conducting member 24 constituting the movable plate 23. By preheating the mold 8 for a predetermined time, moisture and the like are removed from the raw material 29 accommodated in the mold 8.

  Next, as shown in FIG. 12, the shutter 19b is moved in the + X direction using the open / close mechanism 20b. As a result, the passage 18 b provided at the top of the preheating furnace 37 is opened. By moving the shutter 19a in the + X direction using the open / close mechanism 20a, the passage 18a provided in the lower part of the heating furnace 36 is opened. The movable mechanism 23 is raised using the drive mechanism 21. The movable plate 23 is accommodated inside the heating chamber 38 by sequentially passing through the passage 18 b provided in the upper part of the preheating furnace 37 and the passage 18 a provided in the lower part of the heating furnace 36.

  The temperature inside the heating chamber 38 is raised to 800 ° C. in advance by the heater 12 a. In the heating chamber 38, the mold 8 is sandwiched between the fixed platen 14 and the movable platen 23. The heat conduction from the heat conduction member 15 constituting the fixed platen 14 and the heat conduction member 24 constituting the movable platen 23 uniformly heats the molding die 8 from both surfaces (upper surface and lower surface) of the molding die 8.

  After heating the mold 8 for a predetermined time, the movable platen 23 is further raised using the drive mechanism 21 to press the mold 8. As a result, the raw material 29 (see FIG. 2) accommodated between the upper mold 28 and the lower mold 27 constituting the mold 8 is heated while being pressurized. By heating the mold 8 while being pressurized at a predetermined temperature for a predetermined time, the raw material 29 accommodated in the mold 8 is molded. A molded body (sintered body) is formed from the raw material 29 by the steps up to this point.

  Next, as shown in FIG. 13, the movable mechanism 23 is lowered using the drive mechanism 21. The movable platen 23 is lowered to stop the mold 8 at a predetermined position inside the container 5 and below the preheating furnace 37. The passages 18a, 18b, 18c are closed by moving the shutters 19a, 19b, 19c respectively in the -X direction. Next, the cooling body 40 provided in the cooling device 30 is stopped at a predetermined position by moving in the + X direction. The movable mold 23 is brought into contact with the cooling body 40 by raising the movable plate 23 using the drive mechanism 21. The mold 8 is cooled to room temperature by utilizing the heat conduction from the mold 8 to the cooling body. After the molded body 8 is cooled to normal temperature, the cooling body 40 is returned to the original position. Next, the inside of the container 5 is brought to atmospheric pressure, and the mold 8 cooled to normal temperature is removed from the container 5.

  According to the present embodiment, the heating furnace 36 and the preheating furnace 37 are provided inside the container 5. The temperature inside the heating furnace 36 and the temperature inside the preheating furnace 37 are each raised to a predetermined temperature. The temperature inside the heating furnace 36 is raised to a high temperature (800 ° C.). The temperature in the preheating furnace 37 is raised to an intermediate temperature (400 ° C.). Therefore, the heat treatment at the medium temperature and the heat treatment at the high temperature can be performed continuously inside the container 5. The temperature inside the heating furnace 36 and the temperature inside the preheating furnace 37 are each raised in advance to a predetermined temperature. As a result, the temperature inside the heating furnace 36 and the temperature inside the preheating furnace 37 are both unnecessary. In addition, after the molding process is completed, the mold 8 taken out of the heating chamber 38 is forcibly cooled in the interior of the container 5 below the preheating furnace 37. Therefore, the time required for cooling is reduced. Therefore, the productivity of the hot pressing apparatus 35 can be improved.

  With reference to FIG. 14, another mold used in the hot press device according to the present invention will be described. The mold 41 shown in FIG. 14 is a mold for molding a plurality of molded bodies in one molding process.

  As shown in FIG. 14, the mold 41 has a lower mold 42 and an upper mold 43. The lower die 42 has a plurality of recesses 44 formed therein. The raw material 45 is accommodated in the plurality of recesses 44. A plurality of intermediate dies 46 are provided corresponding to the plurality of recesses 44 respectively. The plurality of intermediate dies 46 slide in the respective recesses 44. Between the plurality of intermediate molds 46 and the upper mold 43, buffer materials 47 for uniformly pressing the raw materials 45 stored in the respective recesses 44 are respectively inserted. The lower mold 42, the upper mold 43 and the intermediate mold 46 are made of graphite. As the cushioning material 47, fluororubber or the like is used.

  In the hot press apparatus according to the present invention, the mold 41 is heated by the heat conduction from the heat conduction member. Since the heat transfer member has a large heat conductivity, the entire area of the heat transfer member is uniformly heated. Therefore, the raw material 45 accommodated in the several recessed part 44 can be uniformly heated by the heat conduction from a heat conductive member. In addition, by inserting the plurality of shock absorbing materials 47 between the upper mold 43 and the plurality of intermediate molds 46, it is possible to reduce the variation of the pressing force for pressing the raw material 45 accommodated in the plurality of recesses 44. . By this, in the case of molding a plurality of molded bodies, both of the variation of the molding temperature and the variation of the pressing force can be suppressed. Therefore, since a plurality of formed bodies can be formed uniformly by one forming process, the productivity of the hot pressing apparatus can be improved.

  In each example, a resistance heating heater was used as a heating unit for heating the heating chamber. Not limited to this, the heating chamber can be heated using a heating unit such as an induction heating type heating coil or a halogen lamp heater.

  In each example, the lower ram was moved up and down, and the mold was pressurized by raising the lower ram. The invention is not limited to this, and the upper ram can be moved up and down. In this case, the mold is pressurized by raising the lower ram and lowering the upper ram.

  A configuration in which the configurations shown in FIGS. 1 and 10 are rotated 90 degrees clockwise or counterclockwise may be employed. In this case, the movable board 23 moves in the horizontal direction.

  Examples of molded bodies (sintered bodies) molded according to each embodiment include wear resistant mechanical parts such as valve guides and valve seats, bearings, cutting tools, grinding tools, polishing tools, rotary blades, etc. . The formed body (sintered body) to be formed is not limited to these.

  The present invention is not limited to the above-described embodiments, and can be arbitrarily and appropriately combined, changed, or selected and adopted as needed without departing from the scope of the present invention. It is.

1, 35 Hot Press Equipment (Manufacturing Equipment)
2 lower mold base 3 support member 4 upper mold base 5 container (outer shell)
6a, 6b Support member 7 Vacuum pump (pressure reduction mechanism)
8, 41 forming mold 9, 36 heating furnace 10 heat insulation wall 11, 38 heating chamber 12, 12a, 12b heater (heating unit)
13 upper ram 14 fixed board 15 heat conducting member (first heat conducting member)
16 Heat insulation member (first heat insulation member)
17, 17a, 17b Gas supply mechanism 18, 18a, 18b, 18c Passage 19, 19a, 19b, 19c Shutter (opening / closing part)
20, 20a, 20b, 20c Opening and closing mechanism 21 Drive mechanism (moving mechanism)
22 lower ram 23 movable board 23a arrangement area 24 heat conducting member (second heat conducting member)
25 Thermal insulation member (second thermal insulation member)
26 Frame member 27, 42 Lower mold 28, 43 Upper mold 29, 45 Raw material 30 Cooling system (cooling mechanism)
Reference Signs List 31 cooling ring 32 gas supply hole 33 radiant heat 34 heat conduction 37 preheating furnace 40 preheating chamber 40 cooling body 44 recessed portion 46 intermediate type 47 buffer material P1, P2, P3, P4 piping V1, V2, V3, V4 on-off valve G nitrogen gas supply Machine L Length of heating chamber t1, t4 Thickness of heat conducting member t2 Thickness of heat insulating member, thickness of top and bottom wall of heat insulating material t3 Thickness of mold Mold thickness of lower wall of heat insulating wall t5 The

Claims (7)

An outer shell part, a heating furnace provided inside the outer shell part, a heating part provided in the heating furnace, a heating chamber provided inside the heating furnace and heated by the heating part, the heating chamber moving and stationary platen provided inside a passage formed in a position toward pair to said stationary platen is provided on the outer wall of the furnace, between the inside and outside of the heating chamber through the passageway And a moving mechanism for moving the movable plate, wherein the movable body is manufactured from a raw material accommodated in the inside of the molding die. An apparatus for producing a molded body,
A first heat insulating member included in the fixed board and provided on the opposite side to the passage in the fixed board;
A first part included in the fixed board, attached to the first heat insulating member on the side of the passage in the fixed board, and having a length corresponding to a length in the heating chamber along a moving direction of the movable board A heat conducting member of
Included in the movable platen, and a second insulation member provided so as to pair toward said first heat conducting member,
And an opening and closing unit for opening and closing the passage,
Applying pressure to the raw material by pressing the mold placed in the placement area between the first heat conducting member and the second heat insulating member; at least the heating portion and the first portion And the heating of the raw material by the heat conduction member is performed to manufacture the molded body,
The manufacturing apparatus of the molded object with which the said molded object is cooled in the exterior of the said heating chamber. In the apparatus for manufacturing a molded body according to claim 1,
The included in the movable platen, is provided so as to pair toward said first heat conducting member, further comprising a second heat conducting member attached to the second insulating member,
Pressurization of the raw material by the mold being sandwiched and pressurized between the first heat transfer member and the second heat transfer member; and the heating unit and the first heat transfer member The manufacturing apparatus of the molded object which manufactures the said molded object by performing heating with respect to the said raw material by 2nd and said 2nd heat conduction member. A fixed board at least a part of which is provided inside the heating chamber,
And a movable board movable between the inside and the outside of the heating chamber through a passage formed at a position facing the fixed board,
A first heat insulating member, and the movable plate side of the first heat insulating member is attached to the fixed plate, and has a length corresponding to the length in the heating chamber along the moving direction of the movable plate A first heat conducting member is provided;
The raw material accommodated in the forming die disposed on the stationary platen side of the movable platen is sandwiched between the stationary platen and the movable platen inside the heating chamber, and is heated and pressurized to form a molded body, which is movable The manufacturing apparatus of the molded object which was made to move the board | plate from the said channel | path to the exterior of the said heating chamber, and the said molded object is cooled. In the manufacturing apparatus of the molded object of any one of Claim 1 to 3 ,
The manufacturing apparatus of the molded object further provided with the decompression mechanism which decompresses the inside of the said heating chamber. In the manufacturing apparatus of the molded object of any one of Claim 1 to 4 ,
Further Bei El a cooling mechanism provided outside of the front Symbol communication path, the molded body of the manufacturing apparatus. In the manufacturing apparatus of the molded object of any one of Claim 1 to 5 ,
The apparatus further comprises a gas supply mechanism for supplying an inert gas to the heating chamber,
The mold comprises a flammable material,
The manufacturing apparatus of the molded object which pressurization and heating with respect to the said raw material, and cooling with respect to the said molded object are performed in the atmosphere of low oxygen. Using an apparatus for manufacturing a molded article according to any one of claims 1 to 6, a process for producing a molded article for manufacturing the molded body from the raw material contained in the interior of the mold,
Heating the interior of the pre-Symbol pressurized heat chamber,
A step of placing a pre-forming die where Kihara material is received in the movable platen,
Opening the passage;
Moving the mold through the passage by moving the movable platen to accommodate the mold in the heating chamber;
Pressurizing the raw material by pressurizing the mold between the fixed platen and the movable platen ;
Heating the raw material inside the heating chamber ;
And a step of cooling the molded body outside of the heating chamber,
The manufacturing method of the molded object which manufactures the said molded object by performing simultaneously the said process to press and the process to heat.

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