JP2016215217A - Powder molding metal mold device and powder molding method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a powder molding metal mold device and a powder molding method having a deburring mechanism or a weighting filling mechanism.SOLUTION: A powder molding method comprises a process S110 of preparing a metal mold set skewed by a vertically operable core rod penetrating upward from below through the axis of a hollow shaft part of a lower punch fitted to an outer frame metal mold, a process S111 of loading the metal mold set carried in a state of not fitting an upper punch in a deburring mechanism, a proces S112 of removing a burr remaining by sticking to the inner diameter part vicinity of the outer frame metal mold by vertically operating a core part by driving core part vertically driving means, a process S113 of inputting raw material powder by placing the metal mold set on a weighting table of a precision weighting unit after deburring and a process S114 of sending the metal mold set filled with the raw material powder to an ultrasonic filling mechanism.SELECTED DRAWING: Figure 5

Description

  TECHNICAL FIELD The present invention relates to a powder molding die apparatus and a molding method using a powder metallurgy technique for molding and sintering raw material powder, and in particular, a powder molding mold apparatus and a molding method used when manufacturing a powder molded body such as metal glass. About.

For example, a miniature bearing having an outer diameter of 30 mm or less has been studied by improving a conventional method of powder metallurgy and manufacturing a powder compact such as metal glass.
In addition, the manufacturing method of the bearing ring, rolling bearing, and bearing ring described in Patent Document 1 is a miniature made of metal glass that is superior in corrosion resistance, strength, and ease of manufacturing compared to alloy bearing rings such as steel. Applicable to bearings for good results. The miniature bearing is manufactured through a process of compressing the metal glass powder filled in the mold and heating it to a temperature region between the glass transition temperature and the crystallization temperature of the metal glass powder.

  Moreover, the powder molding die apparatus described in Patent Document 2 is such that a composite material in which a collar portion made of a green compact is integrally formed around a shaft portion made of a melted material is not cracked or cracked regardless of press-fitting. 2. Description of the Related Art There is known a powder molding die apparatus that is integrally molded with constant and high bonding strength without causing damage. That is, the shaft portion supplied to the shaft portion set position by the shaft portion supply means is inserted into the upper punch by the shaft portion loading rod, and the shaft portion is inserted into the die hole following the powder compression operation of the upper punch. In this state, the powder filled in the die hole is compressed in the axial direction by the upper punch and the lower punch. At the same time that the green compact of the collar portion is compression-molded, the green compact can be integrally molded with the shaft portion, and molding without press-in is possible.

JP 2014-228014 A JP 2010-144241 A

  However, in terms of automation in the method of manufacturing a bearing ring, a rolling bearing and a bearing ring described in Patent Document 1, or a powder molding method described in Patent Document 2, a powder molding method using a similar device, for example, There was room for improvement in the deburring mechanism or the weighing and filling mechanism. In addition, the burr | flash here means the residue which remains in a metal mold | die after taking out a molded product from a metal mold | die, and harms the next shaping | molding. Further, the deburring mechanism is a mechanism for removing burrs remaining on the mold. The weighing and filling described here means that the weight of the raw material powder is accurately measured and filled in the mold when powder molding is performed. Further, the weighing and filling mechanism refers to a mechanism for filling a mold without scattering and leaking raw material powder accurately weighed in a new powder molding process.

  The present invention has been made in view of such problems, and an object of the present invention is to provide a powder molding apparatus and a powder molding method having at least a deburring mechanism or a weighing and filling mechanism for automation. There is to do.

  The present invention has been made to achieve such an object, and the invention according to claim 1 is a material filled in an outer frame mold (20) in which a molding part (23) is formed. A powder molding apparatus (100) for heating and compressing a powder (1) to form a powder molded body (2), wherein the molded part (20) is formed from an upper opening (22) of the outer frame mold (20). 23) An upper punch-shaped upper punch (50) that can be inserted into and removed from the upper part (23), and a hollow shaft part (41) from the bottom opening (21) of the outer frame mold (20) to the molding part (23). The lower lid-shaped lower punch (40) that can be moved forward and backward, and the axial center of the hollow shaft portion (41) of the lower punch (40) that is fitted to the outer frame mold (20) Forms a die set (49) in which a vertically movable core rod (42) that penetrates (44) from the bottom up is integrated in a skewered shape And a heating means (70) for heating the raw material powder (1) filled in the molding part (23), a core part (46) that can be self-supported by a disk-shaped base part (45), The raw material powder (1) filled in the molding part (23) by pressurizing the upper punch (50) and the lower punch (40) fitted in the outer frame mold (20) in a direction approaching each other. And a pressing means (90) for forming a powder molded body (2) by compressing the powder molded body (2), and after forming the powder molded body (2), in the vicinity of the inner diameter portion (24) of the outer frame mold (20) As a deburring mechanism (64) for removing the burrs (19) fixed to the burrs, a deburring base (65) that can accommodate and hold the mold set (49) with the upper punch (50) removed. ), And the outer frame mold (20) and the deburring base (65). And a core part vertical drive means (47) for moving the core part (46) up and down in a state where the lower punch (40) is fixed, and before filling the raw material powder (1), the core The burrs (19) are removed by driving the part vertical drive means (47).

  Further, the invention according to claim 2 is the powder molding die apparatus (100) according to claim 1, wherein the deburring mechanism (64) includes the inner diameter portion (24) of the outer frame die (20). ) It is characterized by comprising an air blow (67) for blowing off the burrs (19) peeled off from the vicinity.

  According to the third aspect of the present invention, the powder powder (2) is obtained by heating and compressing the raw material powder (1) filled in the outer frame mold (20) in which the molding part (23) is formed. Is a powder molding die device (100) for molding a top lid-like upper punch that can be fitted into and removed from the molding part (23) from the upper opening (22) of the outer frame die (20). 50) and a lower lid-shaped lower punch (40) in which a hollow shaft portion (41) is fitted into the molding portion (23) from the bottom opening (21) of the outer frame mold (20) to allow advancement and retraction. ), And a vertically movable core rod that penetrates the shaft center (44) of the hollow shaft portion (41) of the lower punch (40) fitted to the outer frame mold (20) from below to above 42) forms a die set (49) integrated in a skewered shape and is self-supported by a disc-shaped base (45). Core part (46) capable of heating, heating means (70) for heating the raw material powder (1) filled in the molding part (23), and the outer frame mold (20) By pressing the upper punch (50) and the lower punch (40) in a direction to approach them, the raw material powder (1) filled in the molding part (23) is compressed to form a powder compact (2). A weighing means (13) for weighing and filling the raw material powder (1) by a specified amount, and holding the funnel-shaped powder chute (14) up and down A filling machine (15) that operates, a guide column (16) that supports the filling machine (15) so that it can move up and down and can be stopped and held, and a mold set with the upper punch (50) removed ( 49) and the vertical line (A) of the filling machine (15). A precision weigher (32) on which the mold set (49) can be placed and weighed, and the weighing and filling mechanism (13) includes the mold set (49) and the precision weigher (32). ) And waits at a predetermined position in a state where measurement is possible, and the amount of the raw material powder (1) charged from the powder chute (14) to the mold set (49) waiting at the predetermined position is It is determined by the detection output of the precision weigher (32) that the specified weight has been reached, and charging from the powder chute (14) is stopped.

  Further, the invention according to claim 4 is the powder molding die apparatus (100) according to claim 3, wherein the filling machine (15) of the weighing and filling mechanism (13) is made of the raw material powder (1). A charging position restricting body (18) for restricting the charging direction from the powder chute (14) to only the molding part (23) of the outer frame mold (20) is used as a powder of the powder chute (14). It is characterized by being provided near the body drop opening (33).

  According to a fifth aspect of the present invention, there is provided a molded portion (fitting part) formed by fitting a piston-like lower punch (40) and an upper punch (50) on the upper and lower sides of a cylindrical outer frame mold (20), respectively. 23) a powder molding method based on a powder metallurgy method in which the raw material powder (1) filled in 23) is compressed by the lower punch (40) and the upper punch (50) to form a powder compact (2). A vertically movable core rod (42) penetrating from the bottom to the top (44) of the hollow shaft portion (41) of the lower punch (40) fitted to the outer frame mold (20) A step (S110) for preparing a die set (49) that is skewered, and a die set (49) conveyed in a state where the upper punch (50) is not fitted into the deburring mechanism (64). ) (S111), and the core part vertical driving hand A step (S112) of removing the burrs (19) remaining on the inner diameter portion (24) of the outer frame mold (20) by driving (47) and moving the core portion (46) up and down; After deburring, placing the mold set (49) on the weighing platform (34) of the precision weigher (32) and charging the raw material powder (1) (S113), and the raw material powder (1) And a step (S114) of sending the mold set (49) filled with an ultrasonic filling mechanism (S114).

  According to the present invention, it is possible to realize a powder molding apparatus and a powder molding method having at least a deburring mechanism or a weighing and filling mechanism for automation.

It is a longitudinal cross-sectional view for demonstrating the principal part (die set, workpiece moving body) of the powder molding die apparatus (henceforth "this apparatus") concerning the embodiment of the present invention. It is a perspective view for demonstrating the process of setting the metal mold | die set of FIG. 1 to a deburring stand, and deburring. It is a side view for demonstrating the process which sets the metal mold | die set of FIG. 1 to a weighing filling mechanism, and is filled with raw material powder. It is explanatory drawing of the main assistance apparatuses contained in this apparatus, (A) The top view of a robot arm, (B) The longitudinal cross-sectional view of a powder chute and an outer frame metal mold | die. It is a flowchart for demonstrating the procedure of a deburring and weighing filling in this apparatus. It is a model explanatory view for explaining an outline of this device. It is a flowchart for demonstrating the process of a powder shaping | molding method (henceforth "this method") and mold movement which concern on embodiment of this invention. In this method, it is a temperature management graph for demonstrating the temperature adjustment and tact time of a metal mold | die. 1 is an overall front view showing an embodiment of the present apparatus (hereinafter also referred to as “the present embodiment”). It is a whole top view which shows this apparatus shown in FIG.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings, with the main configuration first and the overall configuration later. In addition, in each figure, the same code | symbol is attached | subjected to the member which has the same function, and duplication of description is avoided.

[Main configuration]
FIG. 1 is a longitudinal sectional view for explaining main parts (a mold set 49 and a workpiece moving body 63) of a powder molding mold apparatus (this apparatus) according to an embodiment of the present invention. As shown in FIG. 1, a mold set 49 is constituted by the outer frame mold 20, the lower punch 40, and the core rod 42 as the main part of the apparatus. The mold set 49 is fitted to the outer frame mold 20 so as to cover the upper punch 50 as an upper lid when the raw material powder 1 is heated and compressed, thereby constituting a workpiece moving body 63. That is, the workpiece moving body 63 is at least filled with the raw material powder 1 (becomes the powder molded body 2 after the high-temperature pressure treatment) in the molding portion 23 in the outer frame mold 20 fitted to the lower punch 40. The upper punch 50 is attached to the outer frame mold 20. Note that whether or not the workpiece moving body 63 includes the core portion 46 is optional.

  The upper punch 50 is an upper lid-shaped perforated flange body that can be inserted and removed from the upper opening 22 of the outer frame mold 20 toward the molding portion 23. The lower punch 40 is a bottom lid-shaped perforated flange body in which a hollow shaft portion 41 is fitted from the bottom opening 21 of the outer frame mold 20 toward the molding portion 23 to allow advancement and retraction. With the upper punch 50 removed from the outer frame mold 20, a deburring process (S10 in FIG. 7) and a raw material powder automatic filling process for automatically filling the raw powder 1 into the outer frame mold 20 (FIG. 7). S11) and a step of taking out the molded powder compact 2 from the outer frame mold 20 (S18 in FIG. 7) are performed.

  The core part 46 is integrally formed by a disk-like base part 45 and a rod-like core rod 42 that is planted so as to stand vertically upward from the center part of the base part 45. The core rod 42 can move up and down through the shaft center 44 of the hollow shaft portion 41 of the lower punch 40 fitted to the outer frame mold 20 from below. The core rod 42 skewers the outer frame mold 20 and the lower punch 40 to form a mold set 49 in which these three points are integrated. The mold set 49 can be placed so that the disk-shaped base 45 is brought into surface contact with a horizontal base (for example, the weighing base 34 in FIG. 3) so as to be self-supporting.

  The press means 90 is constituted by a hydraulic device (not shown) or the like, and pressurizes the upper punch 50 and the lower punch 40 inserted in the outer frame mold 20 in a direction in which they approach each other, thereby filling the molding part 23 with the raw material. The powder 1 is compressed to form a powder compact 2. The heating means 70 (FIG. 6) having the induction coil 71 causes the outer frame mold 20 to generate heat by applying a low-frequency electromagnetic induction action, and the raw material powder 1 filled in the molding portion 23 inside the outer frame mold 20. Heat.

  FIG. 2 is a perspective view for explaining a deburring process by setting the mold set of FIG. 1 on a deburring base. As shown in FIG. 2, the deburring mechanism 64 is a mechanism for removing the burrs 19 fixed to the vicinity of the inner diameter portion 24 of the outer frame mold 20 after the powder molded body 2 is molded. The deburring mechanism 64 includes a deburring base 65 and a core part vertical drive means 47, and can accommodate and hold the mold set 49 with the upper punch 50 removed.

  The deburring mechanism 64 first places the outer frame mold 20 and the lower punch 40 on the deburring stand 65. In the fixed state, before the raw material powder 1 is filled, the burr 19 (FIG. 1) is removed by driving the core unit vertical drive means 47 to move the core unit 46 up and down. The vertical movement of the core part 46 is performed by the driving force of the core part vertical driving means 47. The core part up-and-down driving means 47 includes a core part lifting arm 66 connected to the core part lifting arm 66 and the base part 45 engaged with the core part lifting arm 66 is driven in the vertical direction.

  In other words, when driven to lift, the base portion 45 moves upward against the downward driving force of the spring coil 48 against the upward driving force of the core portion lifting arm 66. On the other hand, when the core lifting arm 66 moves downward, the base 45 is pushed back by the elastic force urged by the spring coil 48. At this time, the core rod 42 integral with the base portion 45 is also driven in the vertical direction. The core rod 42 is fixed to the deburring base 65 and operates relative to the stationary outer frame mold 20 and the lower punch 40. . Therefore, the burr 19 fixed to the vicinity of the inner diameter portion 24 of the outer frame mold 20 can be peeled off.

  As shown in FIG. 1, the outer peripheral surface of the core rod 42 is in a close-fitting sliding state with respect to the inner peripheral surface of the shaft portion 41 of the lower punch 40. The function of removing the burrs 19 attached to the vicinity of the center of the upper opening 22 of the outer frame mold 20 from the end face can be exhibited. Further, the deburring mechanism 64 includes an air blow 67 that blows away the burr 19 peeled off from the vicinity of the inner diameter portion 24 of the outer frame mold 20. A compressed air delivery unit 68 is disposed beside the deburring base 65, and compressed air is delivered from the compressed air delivery unit 68 to the air blow 67. The removed burrs 19 are blown off to the back of the deburring base 65 by the spraying action of the air blow 67. The burr 19 is accommodated and cleaned / discarded by a dust collector (not shown) disposed at the back of the deburring base 65.

  FIG. 3 is a side view for explaining a step of filling the raw material powder by setting the mold set of FIG. 1 in the weighing and filling mechanism. As shown in FIG. 3, the weighing and filling mechanism 13 is a mechanism for accurately weighing and filling the raw material powder 1 by a specified amount in the molding part 23 in the mold set 49 composed of three main points. , A filling machine 15, a guide column 16, and a precision weigher (hereinafter also referred to as “electronic balance”) 32. Further, the filling machine 15 of the weighing and filling mechanism 13 includes a charging position restricting body 18 that restricts the charging direction of the raw material powder 1 from the powder chute 14 to only the molding part 23 of the outer frame mold 20, and the powder chute 14. The powder drop opening 33 is provided in the vicinity.

  The filling machine 15 moves up and down while gripping a funnel-shaped powder chute 14 having a rod-shaped charging position restricting body 18 at the center. Therefore, the guide column 16 supports the filling machine 15 so that it can move up and down and can be stopped and held. Even if the filling machine 15 is lowered, a gap G1 is secured between the charging position restricting body 18 that moves downward together with the filling machine 15 and the core rod 42 that is integrated with the core portion 46, so that they do not come into contact with each other. In this way, control is performed based on the position sensor output (not shown) and the calculation result of the control unit 80 (see FIG. 6). The closing position restricting body 18 will be described later with reference to FIG. In addition, a stirring blade type powder feeder 35 is disposed above the filling machine 15. The stirring blade type powder feeder 35 has a function of sieving a desired amount of powder according to the rotation of a step motor (not shown) controlled by the control unit 80 (FIG. 6).

  The electronic balance 32 is disposed directly below a vertical line A that penetrates the center in plan view with respect to the entire filling machine 15. The mold set 49 can be placed on the weighing table 34 of the electronic balance 32 so that the axis 44 of the mold set 49 is aligned with the vertical line A, and the total weight of the mold set 49 can be measured. The mold set 49 is taken in and out in the horizontal direction with respect to the weighing and filling mechanism 13 according to the progress of the process.

  That is, the mold set 49 is stored in the deburring mechanism 64 and deburred (step S112 in FIG. 5) in an empty state where the powder molded body 2 is taken out from the molding unit 23 inside, and then the robot arm 54 (FIG. 4 (A)), it moves to the weighing and filling mechanism 13, is placed on the weighing table 34 of the electronic balance 32, and the raw material powder 1 is charged (step S113 in FIG. 5). Next, the mold set 49 filled with the raw material powder 1 is subjected to an ultrasonic filling mechanism (ultrasonic transmitter 31 in FIGS. 6, 9, and 10) by the fourth conveying means 84 formed by another robot arm or a conveyor. (Step S114 in FIG. 5). The ultrasonic filling mechanism pushes the raw material powder 1 put in the molding part 23 of the mold set 49 with the powder chute 14 evenly into the corners without any gaps while vibrating with ultrasonic waves.

  The weighing and filling mechanism 13 first places the mold set 49 on the weighing table 34 of the electronic balance 32 and waits at a predetermined position in a state where measurement is possible. Next, the weighing and filling mechanism 13 uses the detection output of the electronic balance 32 to confirm that the amount of the raw material powder 1 that has been fed from the powder chute 14 to the mold set 49 waiting at a predetermined position has reached the specified weight. When it is determined, the charging from the powder chute 14 is stopped. The control of the dropping and stopping of the raw material powder 1 is performed by the control unit 80 controlling the rotation of the stirring blade type powder feeder 35 based on the calculation result comparing the specified value and the detection output of the electronic balance 32. .

  4A and 4B are explanatory views of main support devices included in the apparatus, and are (A) a plan view of a robot arm and (B) a longitudinal sectional view of a powder chute and an outer frame mold. The robot arm 54 shown in FIG. 4 (A) grips and moves the lower punch 40 or the core portion 46 (FIGS. 1 to 3) of the object at a specified timing according to the drive command of the control unit 80 (FIG. 6). In addition, an opening operation at a predetermined position is possible. For example, the robot arm 54 may be of any type such as a robot cylinder arm, as long as it has a similar purpose and function.

  Further, the control unit 80 (FIG. 6) receives the latest information on the positions, postures, and the like of the robot arm 54 and the object from a position sensor (not shown), and is stored in a storage device attached to the control unit 80. By starting the program and performing arithmetic processing using various reference data, the robot arm 54 and automation equipment such as a conveyor (not shown) are controlled in an integrated manner to achieve the object.

  4B, the funnel-shaped central axis can be moved up and down along the vertical axis A and can be stopped and held as shown in FIG. In a state where the powder chute 14 is lifted high, the mold set 49 is set in the weighing and filling mechanism 13 while moving horizontally. Thereafter, the powder chute 14 is lowered so that the lower end surface 18 a of the charging position restricting body 18 of the powder chute 14 faces just before contacting the upper end surface 42 a of the core rod 42. In this state, the raw material powder 1 of the powder chute 14 is dropped from the upper opening 22 on the upper side of the outer frame mold 20 to the molding part 23 inside.

  At this time, as shown in the gap G2 in FIG. 4B, when the distance from the lower end surface 18a of the charging position restricting body 18 of the powder chute 14 to the upper end surface 42a of the core rod 42 is largely separated, The raw material powder 1a falls on the end surface 42a from an oblique direction. Therefore, only the amount obtained by subtracting the amount of the raw material powder 1 a that falls on the upper end surface 42 a from the total weight of the dropped raw material powder 1 is supplied to the internal molding unit 23. As a result, the powder molded body 2 molded by the molding unit 23 is likely to be of poor quality due to a lack of materials.

  In addition, if the work of accurately weighing and filling the raw material powder 1 is manually performed on mold apparatuses having different weights, a skilled craftsman who can accurately respond is required, and the production efficiency Was not always good. According to the powder molding method according to the present invention, since the weighing and filling mechanism is used, the raw material powder is automatically and accurately weighed for each mold apparatus having a different weight, and the molding part located inside the mold is placed in the molding unit. The effect that it can be filled is obtained.

  One of the main purposes of the apparatus 100 is to drop and fill the raw material powder 1 accurately and automatically weighed by the weighing and filling mechanism 13 into the molding portion 23 inside the outer frame mold 20. . For this purpose, the distance from the lower end surface 18a of the charging position restricting body 18 of the powder chute 14 to the upper end surface 42a of the core rod 42 is made as close as possible as in the narrowed gap G1 shown in FIG. preferable. If the gap G1 is narrowed in this way, it is possible to reduce the amount of the raw material powder 1a that accumulates on the upper end surface 42a of the core rod 42 by being blown into the crosswind. 3 and 4B, the diameter of the core rod 42 and the diameter of the closing position restricting body 18 are drawn the same, but the diameter of the closing position restricting body 18 is made larger than the diameter of the core rod 42. Also good.

  FIG. 5 is a flowchart for explaining the procedure of deburring and weighing and filling in this apparatus. The apparatus 100 precisely weighs and fills the raw material powder 1 after removing the remaining burrs 19 in the procedure shown in steps (S110) to (S114) in FIG. That is, when the same molded product 2 is repeatedly mass-produced in the automatic production line, after removing the burrs 19 generated by the previous production process (S112), the raw material powder 1 is used for the subsequent production process. Accurately weigh and fill (S113). The steps (S110) to (S114) shown in FIG. 5 are included in the deburring step (S10) and the raw material powder automatic filling step (S11) described later with reference to FIG. More specifically, the deburring step (S10) includes steps (S110) to (S112), and the raw material powder automatic filling step (S11) includes steps (S113) to (S114).

  First, a step of preparing a mold set 49 in which the outer rod mold 20 and the lower punch 40 are skewered by the core rod (S110). Next, a step of loading the mold set 49 into the deburring mechanism 64 (S111). Next, the core part 46 is moved up and down to remove the burrs 19 attached to the vicinity of the inner diameter part 24 of the outer frame mold 20 (S112). Next, a step of placing the raw material powder 1 by placing the mold set 49 on the weighing table 34 of the electronic balance (precision weighing machine) 32 (S113). Next, the die set 49 filled with the raw material powder 1 is executed according to the procedure of sending to the ultrasonic filling mechanism (S114). Hereinafter, the steps (S110) to (S114) will be described in more detail.

  First, in the step of forming and preparing the mold set 49 so that the three components are integrated (S110), the shaft of the hollow shaft portion 41 of the lower punch 40 fitted to the outer frame mold 20 is used. The core rod 42 capable of moving up and down the core 44 is in a state of penetrating the skewer from below. That is, three points of the outer frame mold 20, the lower punch 40, and the core rod 42 are integrally formed in the mold set 49, and are prepared for new molding. If the three components constituting the mold set 49 are always integrated and cannot be disassembled for the convenience of the process, there is no process for assembling the mold set 49. In that case, the process of forming and preparing the mold set 49 (S110) is positioned as a process for convenience in explaining the shape of the mold set 49.

  Next, in the step (S111) in which the robot arm 54 holds the mold set 49 and loads it into the deburring mechanism 64 (S111), the mold is conveyed by a conveyor (not shown) in a state where the upper punch 50 is not fitted. The mold set 49 is gripped by the robot arm 54 and loaded into the deburring mechanism 64.

  Next, in the step of removing the burrs 19 (S112), the core portion vertical drive means 47 is driven to move the core portion 46 up and down, so that the burrs that remain fixed near the inner diameter portion 24 of the outer frame mold 20 remain. 19 is peeled off and blown off by an air blow 67 to be removed. After removing the burrs 19, in the step of feeding the raw material powder 1 (S <b> 113), the mold set 49 is placed on the weighing table 34 of the precision weigher 32, and the raw material powder 1 is put in while accurately weighing. Next, in the step of sending the die set 49 filled with the raw material powder 1 to the ultrasonic filling mechanism (S114), the die set 49 filled with the raw material powder 1 is moved by an ultrasonic wave (not shown) by the robot arm 54. It is transferred to the filling mechanism.

  Further, in the mass production type automatic production (automation) facility, the burr 19 remaining in the inner diameter portion of the outer frame mold 20 in the product take-out step (S18 in FIG. 7) is the raw material powder automatic filling step (FIG. 7). In the previous stage of S11), it was necessary to remove it manually. In this respect, not only was it necessary to manpower, but it was also a factor that reduced production efficiency. In view of this, the apparatus 100 grips the mold set 49 by the robot arm 54 and loads it into the deburring mechanism 64 in step (S111), and in the vicinity of the inner diameter portion 24 of the outer frame mold 20 in step (S112). The burr 19 remaining after being fixed was removed. As a result, since the burrs 19 are automatically and reliably removed in a short time, no manual work is required and the production efficiency is improved.

[overall structure]
The overall configuration including the main configuration described above will be described.
The apparatus 100 is for heating and compressing a raw material powder 1 filled in an outer frame mold 20 having a molding part 23 formed therein to form a powder compact 2, and based on a powder metallurgy method, By processing the powder 1 into the powder compact 2, for example, miniature bearings, small gears, etc. are mass-produced.

  FIG. 6 is a schematic explanatory diagram for explaining the outline of the present apparatus. As shown in FIG. 6, this apparatus 100 includes a plurality of work moving bodies 63, a heating press cooling line 11 and a support line 12 through which the work moving bodies 63 move, and a control unit 80 that performs overall control of these line configurations. And is configured. It should be noted that FIG. 6 for explaining the outline of the present apparatus and other drawings do not coincide with the shape of the details.

  As described with reference to FIG. 1, the workpiece moving body 63 has at least the raw material powder 1 (the powder molded body 2 after the high-temperature pressurizing process) in the molding portion 23 in the outer frame mold 20 fitted to the lower punch 40. And the upper punch 50 is fitted to the outer frame mold 20. In addition, the workpiece moving body 63 may include the core portion 46 as appropriate. However, the core portion 46 is omitted in FIG.

  The heating press cooling line 11 includes a lower punch holder 91, a heating unit 70, a pressing unit 90, a nitrogen chamber forming unit 93, a temperature adjusting unit 72, and a third transport unit 83. It has a slow cooling position 5. The heating press cooling line 11 uses the workpiece moving body 63 as a moving unit, and heats the raw material powder 1 charged in the workpiece moving body 63 by the heating means 70, pressurization by the pressing means 90, and temperature adjusting means. The robot configuration is such that heat retention by 72 and cooling of a predetermined temperature gradient can be sequentially executed by a command from the control unit 80.

  In addition, the control part 80 is comprised by the computer apparatus not shown, and a principal part is comprised, and has an operation program, a database, a calculating part, an input part, and an output part. The temperature adjusting means 72 is heated by the heating means 70 while maintaining the overall control of the control unit 80 and is maintained in the range of 350 to 430 ° C. for 150 seconds or longer, and then by air blow or the like of the air nozzle or air cooling fan 73. Cool while switching the temperature gradient from rapid cooling to slow cooling.

  The workpiece moving body 63 used in the heating press / cooling line 11 is a structural unit for mounting the workpiece and related members by the conveyance fixing jig 60 and moving according to the progress of each process. The conveyance fixing jig 60 can attach and detach related members including the outer frame mold 20, and repeats disassembly, assembly, fixing, and movement of each member according to each process. The outer frame mold 20 is filled with the raw material powder 1 as a workpiece. Note that most of the conveyance fixing jig 60 is configured by the lower punch 40 also being used. Furthermore, the conveyance fixing jig 60 and the mold set 49 may be substantially the same, but both are viewpoints of a jig for conveying a workpiece in each process or fixing it for processing in an automation facility. Nomenclature is differentiated between the conveying and fixing jig 60 and the mold set 49 from the viewpoint of a mold set exclusively for powder metallurgy.

  The support line 12 includes a first conveying unit 81, a second conveying unit 82, a fourth conveying unit 84, a mold placing unit 86, a raw material powder filling unit 30, an upper punch fitting unit 51, and an upper punch removing unit. A means 52, an upper punch returning means 87, and a product taking-out means 85 are provided. The support line 12 has a robot configuration that can execute a series of steps for supporting the heating press cooling line 11 described above according to a command from the control unit 80.

The first conveying means 81 is configured to place the outer frame mold 20 placed on the upper part of the conveyance fixing jig 60 and the raw material powder 1 filled in the outer frame mold 20 from the raw material powder filling position 8 to the upper punch fitting position 3. Transport and fix.
The second conveying means 82 conveys the workpiece moving body 63 from the upper punch fitting position 3 to the heating press position 4.
The third transport unit 83 transports the workpiece moving body 63 from the heating press position 4 to the disassembly / extraction position 6.
The fourth conveying means 84 conveys the outer frame mold 20 from which the upper punch 50 has been removed from the disassembly / extraction position 6 to the raw material powder filling position 8 (or the mold return position 7).
In addition, since the 3rd conveyance means 83 conveys and fixes the workpiece moving body 63 containing the workpiece | work of 350 degreeC or more immediately after a high temperature pressurization process, when other conveyance means is sufficient with the heat-resistant temperature of 60 degreeC, it is higher than it. Heat resistance is required.

  The raw material powder filling means 30 measures the raw material powder 1 and fills the molding part 23 from the upper opening 22 of the outer frame mold 20. The raw material powder filling means 30 includes the weighing and filling mechanism 13 including the electronic balance 32 described with reference to FIGS. 3 to 5 and the ultrasonic oscillator 31, and the raw material powder 1 stored in the powder chute 14 and the like. Is weighed by an electronic balance 32, and the raw material powder 1 after weighing is uniformly filled into the molding part 23 formed inside the outer frame mold 20 while being vibrated by ultrasonic waves generated by the ultrasonic oscillator 31. .

  Here, the conveyance fixing jig 60 is in a state in which the core rod 42 is inserted into the lower punch 40. In the present apparatus 100, when the conveyance fixing jig 60 moves, the lower punch 40 and the core rod 42 are integrally gripped and moved so that the core rod 42 does not fall off.

  Here, a state is shown in which the upper punch fitting means 51 has already fitted the upper punch 50 to the outer frame mold 20 at the upper punch fitting position 3 (FIG. 6). The control unit 80 drives a robot arm (not shown) that constitutes the upper punch fitting means 51, and the lower part of the upper punch 50 is fitted coaxially to the cylindrical outer frame mold 20.

  Further, a hydraulic cylinder (not shown) constituting the press means 90 (arrow in FIG. 1) abuts on the upper surface of the upper punch 50 so as to replace the upper punch fitting means 51, and the upper punch is lifted by the hydraulic cylinder (3 to 15KN). 50 and the lower punch 40 are compressed so as to approach the axial direction. In this way, the powdery compact 2 is molded by pressurizing the raw material powder 1 filled in the molding part 23 and heated by the heating unit 70 with the press unit 90 and subjecting it to a prescribed high-temperature pressurization treatment.

  The workpiece moving body 63 enters the heating step (S13) after being fixed at the heating press position 4 (FIG. 6) (FIG. 7). The induction coil 71 is appropriately held in a positional relationship with the outer frame mold 20 fixed at the heating press position 4. Due to the characteristics of induction heating, it is necessary that the workpiece is positioned at the center of the induction coil 71. However, the induction coil 71 is provided at the heating press position 4 and is used only in the steps of heating (S13) and pressing (S14) (FIG. 7). By passing an alternating current through the induction coil 71, an induction current is generated in the outer frame mold 20 itself made of iron or other magnetic material, and the temperature rises. As a result, the raw material powder 1 filled in the molding part 23 inside the outer frame mold 20 is heated.

  The lower punch 40 constitutes a main part of the conveyance fixing jig 60 as described above. The apparatus 100 compresses the raw material powder 1 charged in the workpiece moving body 63 to form the powder compact 2.

  The powder molding method according to the embodiment of the present invention is a method of molding the powder compact 2 by compressing the raw material powder 1 based on the powder metallurgy method. That is, the raw material powder 1 is filled in the molding part 23 formed by fitting the piston-like lower punch 40 and the upper punch 50 respectively on the upper and lower sides of the cylindrical outer frame mold 20. The raw material powder 1 filled in the molding part 23 of the outer frame mold 20 is compressed by the lower punch 40 and the upper punch 50 to be molded into the powder compact 2.

  The temperature adjusting means 72 cools the outer frame mold 20 and the powder molded body 2 after maintaining them at a predetermined temperature for a predetermined high-temperature pressurizing time T1. Specifically, the temperature adjusting unit 72 is controlled by the control unit 80 to obtain temperature information from a temperature sensor (not shown) and blow air from an air nozzle or an air cooling fan 73 disposed at the cooling position 5. The output is controlled according to a prescribed control pattern. The control pattern will be described later along the temperature management graph of FIG. In addition to temperature management, the control pattern includes timer control in the pressing step (S14).

  The upper punch 50 is removed by the upper punch removing means 52 from the plurality of conveyance fixing jigs 60 conveyed to the disassembly / extraction position 6. The removed upper punch 50 is returned from the disassembly / extraction position 6 to the upper punch fitting position 3 by the upper punch returning means 87. The upper punch returning means 87 is configured such that the controller 80 drives a robot arm (not shown).

  FIG. 7 is a flowchart for explaining the steps of the powder molding method and mold movement according to the embodiment of the present invention. This method is a powder molding method in which the raw material powder 1 is filled in the molding portion 23 formed in the outer frame mold 20, and the powder compact 2 is molded by heating and compressing the filled raw material powder 1.

  First, by the deburring step (S10), the burrs 19 fixed to the vicinity of the inner diameter portion 24 of the outer frame mold 20 are removed. Next, in the raw material powder automatic filling step (S11), the raw material powder 1 of the metal glass particles is weighed by the electronic balance 32, and at the same time, the ultrasonic oscillator 31 generates the metal glass particles (powder) having low powder flowability. While being vibrated using sound waves, the molding part 23 located in the back of the outer frame mold 20 is filled uniformly and smoothly. The raw material powder automatic filling step (S11) shown in FIG. 7 includes steps (S110) to (S114) shown in FIG. Next, in the first conveying step (S1), the outer frame mold 20 is conveyed from the raw material powder filling position 8 to the upper punch fitting position 3 and fixed.

  At the upper punch fitting position 3, the upper punch 50 is fitted to the outer frame mold 20 set on the conveyance fixing jig 60 by the upper punch fitting step (S12), and the workpiece moving body 63 is formed. Here, the workpiece moving body 63 in a state where the raw material powder 1 is charged in the mold set is conveyed from the upper punch fitting position 3 to the heating press position 4 in the second conveying step (S2).

  Next, in the heating (S13) and pressing (S14) steps, a small chamber for purging nitrogen is prepared by the above-described nitrogen chamber forming means 93, and nitrogen purging is performed while preventing diffusion and waste of nitrogen therein. At the heating press position 4 in the nitrogen atmosphere, the raw material powder 1 in the outer frame mold 20 is heated by induction heating (S13) (see FIG. 8).

  In the pressing step (S14) in a nitrogen atmosphere as it is, the heated raw material powder 1 is brought close to the upper punch 50 and the lower punch 40 along the axial direction by the pressing means 90 (3 to 15KN) (arrow in FIG. 1). )Compress. By the heating step (S13), the pressing step (S14) is performed in a state of being heated and kept at a predetermined temperature range. That is, in the pressing step (S14), the raw material powder 1 is maintained in a temperature range of 350 to 430 ° C., and high-temperature pressure treatment is performed so as to ensure a high-temperature pressure treatment time T1 of 150 seconds or more.

  After the pressing step (S14), in the rapid cooling step (S15), the workpiece moving body 63 is left in the heating press position 4 and rapidly cooled from 350 ° C. to 200 ° C. in 15 seconds. This rapid cooling step (S15) can be achieved, for example, by using a coolant in combination with air blow and blowing liquid nitrogen (not shown) onto the workpiece moving body 63.

  Next, in the third transport step (S3), the workpiece moving body 63 is transported from the heating press position 4 through the slow cooling position 5 to the disassembly / extraction position 6 (see FIG. 6). In this 3rd conveyance process (S3), the slow cooling process (S16) is also performed in parallel by carrying out low speed conveyance, ten work moving bodies 63 stagnating sequentially on a belt conveyor. In this slow cooling step (S16), blowing by an air nozzle or an air cooling fan 73 is blown from the outside of the outer frame mold 20 to cool the powder molded body 2 from 200 ° C. to 60 ° C. in 150 seconds (see FIG. 8). .

  Next, at the disassembly / extraction position 6, the upper punch 50 is removed from the outer frame mold 20 by the upper punch returning step (S17), and the removed upper punch 50 is moved from the disassembly / extraction position 6 to the upper punch fitting position. Return to 3. Further, in the product extraction step (S18) at the disassembly / extraction position 6, the powder molded body 2 is extracted from the outer frame mold 20 as shown by the product extraction means 85 in FIG.

  On the other hand, the outer frame mold 20 from which the upper punch 50 has been removed at the disassembly / extraction position 6 is conveyed to the raw material powder filling position 8 (via the mold return position 7) in the fourth conveying step (S4). As shown in the first conveying step (S1) to the fourth conveying step (S4) in FIG. 7, the outer frame mold 20 attached to the conveying and fixing jig 60 has the raw material powder filling position 8 and the upper punch fitting. It circulates over 5 (6) places from the position 3, the heating press position 4, the slow cooling position 5, and the decomposition / extraction position 6 to the raw material powder filling position 8 (via the mold return position 7). For convenience of the support line 12, the mold return position 7 may be provided larger and the extra outer frame mold 20 may be retained there. In such a case, an upper punch return position (not shown) is also provided, and an excess upper punch 50 is retained there for the number adjustment.

FIG. 8 is a temperature management graph for explaining temperature adjustment and tact time of the mold in this method.
FIG. 8 shows only an example. Therefore, if the manufacturing item of the apparatus 100 and the raw material powder 1 are changed, the tact time t and other optimum execution values in each process are appropriately changed.
As shown in FIG. 7, the raw material powder 1 filled in the outer frame mold 20 is heated from room temperature to 430 ° C. in 15 seconds by induction heating in the heating step (S13). A press process (S14) is performed in the state heated and maintained at the high temperature by the heating process (S13). That is, in the pressing step (S14), the raw material powder 1 is maintained in a temperature range of 350 to 430 ° C., and high-temperature pressure treatment is performed so as to ensure a high-temperature pressure treatment time T1 of 150 seconds or more.

  After the pressing step (S14), in the rapid cooling step (S15), the workpiece moving body 63 is rapidly cooled from 350 ° C. to 200 ° C. in 15 seconds. In the slow cooling step (S16) after the rapid cooling step (S15), cooling is performed from 200 ° C. to 60 ° C. in 150 seconds. If it is 60 ° C. or lower, there is no problem of heat resistance in any of the support lines 12, and thereafter, the upper punch returning process (S 17) and the product taking-out process (S 18) are sequentially performed and naturally cooled to room temperature. .

  That is, the dwell time requiring 165 seconds in the pressing step (S14) and the rapid cooling step (S15) cannot be shortened, so that the upper punch fitting position 3, the disassembly / extraction position 6, the mold return position 7 during the 165 seconds. , And one workpiece moving body 63 flows and operates at each raw material powder filling position 8. Note that the slow cooling position 5 corresponds to the ten workpiece moving bodies 63 that are continuously arranged. The workpiece moving body 63 cooled to 60 ° C. at the slow cooling position 5 can be sequentially advanced to the next step, that is, the upper punch returning step (S17) and the product taking-out step (S18).

  According to the present invention, it is possible to realize a powder molding apparatus and a powder molding method having at least a deburring mechanism or a weighing and filling mechanism for automation. More specifically, for example, a deburring mechanism or a weighing and filling mechanism can be improved in terms of automation in a powder molding method using a powder molding die device or a similar device. That is, it is possible to realize a mechanism that automatically and easily removes residues (burrs) remaining in the mold and detrimental to the next molding even after taking out the molded product from the mold. Further, it is possible to realize a weighing and filling mechanism for filling the mold without scattering and leaking the raw material powder whose weight has been automatically and accurately measured in the new powder molding process.

  FIG. 9 is an overall front view showing an embodiment (this embodiment) of the present apparatus. FIG. 10 is an overall plan view showing the present apparatus shown in FIG. As shown in FIG. 9 and FIG. 10, this apparatus 100 is arranged such that each part can be driven on a metal frame 10 that forms a substantially rectangular parallelepiped shape, and is powered by power, hydraulic pressure, and air pressure from the outside, and raw material powder 1. The high-speed continuous metal glass forming apparatus for continuously mass-producing metal glass miniature bearings is constructed. The apparatus 100 is also provided with casters 95 and height adjusting feet 96 on the bottom surface of the metal frame 10 so as to be convenient for a certain amount of movement and stationary adjustment inside the factory. Note that FIGS. 9 and 10 do not show all the parts with reference numerals, so it is necessary to refer to other figures. Moreover, it is not a figure of the property to make it correspond exactly to the shape of a detail with another figure.

  As described with reference to FIG. 6 and other drawings, the present apparatus 100 includes a raw material powder filling position 8, an upper punch fitting position 3, a heating press position 4, a slow cooling position 5, a disassembly / extraction position 6, and a mold return position. 7, the conveyance fixing jig 60 to which the outer frame mold 20 is mounted, the workpiece moving body 63 to which the mold is completely mounted up to the workpiece, or the single upper punch 50 repeats the movement as prescribed. It is configured as follows. The first conveying means 81, the second conveying means 82, the third conveying means 83, the fourth conveying means 84, and the upper punch returning means 87, which are constituted by a belt conveyor and a robot arm, are moved by an instruction from the control unit 80. Run.

  In the apparatus 100, as described with reference to FIGS. 1 to 8, the mold placing means 86 and the deburring mechanism 64 are disposed at the mold return position 7 or the raw material powder filling position 8. In addition, a weighing and filling mechanism 13 and an ultrasonic oscillator 31 are disposed as raw material powder filling means 30 at the raw material powder filling position 8. Further, an upper punch fitting means 51 is disposed at the upper punch fitting position 3. Further, a mold outer frame 94, a heating means 70, a pressing means 90, and a nitrogen chamber forming means 93 are disposed at the heating press position 4. In addition, a third transport unit 83, a temperature adjustment unit 72, and an air cooling fan 73 are disposed at the slow cooling position 5. Similarly, an upper punch raising / lowering holder (upper punch removing means) 52, a robot arm (not shown), and a product removing means 85 are disposed at the disassembly / extraction position 6.

  The apparatus 100 is configured such that the heating press / cooling line 11 and the support line 12 are controlled and operated by the control unit 80, and an input unit included in the control unit 80, that is, a switch (not shown) disposed on the operation panel 88. By operating a class, it is in an active or stopped state. In addition, fully automatic operation is possible by executing the program. For example, input of the fact that 100 pieces are to be produced, the appropriate raw material powder 1 is arranged at the raw material powder filling position 8, and the operation switch is turned on. 100 pieces of metal glass powder compacts 2 forming the main components of the bearing are stored in the product storage area.

  The powder molding die apparatus and the powder molding method according to the present invention include, for example, a large amount of miniature bearings that require corrosion resistance that can withstand frequent chemical cleaning, such as bearings for dental drills. It can be used as a high-speed continuous metallic glass forming apparatus for production.

1 Raw material powder, 1a Raw material powder deposited on the upper end surface 42a of the core rod, 2 Powder compact, 3 Upper punch fitting position, 4 Heating press position, 5 Slow cooling position, 6 Disassembly / extraction position, 7 Mold return position, 8 Raw material powder filling position, 9 (slide bed type) press receiver, 10 metal frame, 11 heating press cooling line, 12 support line, 13 weighing filling mechanism, 14 powder chute, 15 filling machine, 16 guide strut, 17 vibration isolation Base, 18 Input position restricting body, 18a Lower end surface of input position restricting body 18, 19 Burr, 20 Outer frame mold, 21 Bottom opening, 22 Upper opening, 23 Molding part, 24 Inner diameter part, 30 Raw material powder filling means, 31 Ultrasonic oscillator, 32 electronic balance (precision weighing machine), 34 weighing platform, 33 powder drop port, 35 stirring blade type powder feeder, 40 H, 41 shaft part, 42 core rod, 42a upper end surface of core rod, 43 temperature sensor, 44 shaft center, 45 base part, 46 core part, 47 core part vertical drive means, 48 coil spring, 49 (upper punch 50 is removed Mold set, 50 upper punch, 51 upper punch fitting means, 52 upper punch lifting holder (upper punch removing means), 54 robot arm, 60 transport fixing jig, 63 workpiece moving body, 64 deburring mechanism, 65 Deburring base, 66 Core part lifting arm, 67 Air blow, 68 Compressed air delivery part, 70 Heating means, 71 Inductive coil, 72 Temperature adjusting means, 73 Air cooling fan, 74 conveyor, 80 control part, 81 First conveying means, 82 Second conveying means, 83 Third conveying means, 84 Fourth conveying means, 85 Product take-out means, 86 Gold Placement means, 87 upper punch return means, 90 press means, 93 nitrogen chamber forming means, 94 mold outer frame, 95 casters, 96 height adjustment foot, 100 powder molding die apparatus, A vertical line of filling machine 15, G1, G2 gap, S1 first conveying step, S2 second conveying step, S3 third conveying step, S4 fourth conveying step, S10 deburring step, S11 raw material powder automatic filling step, S12 upper punch fitting step, S13 heating Process, S14 Pressing process, S16 Slow cooling process, S17 Upper punch returning process, S18 Product removal process, S20, T1 High temperature pressurizing time, T2 Slow cooling time, t takt time

Claims (5)

A powder molding die apparatus for molding a powder molded body by heating and compressing raw material powder filled in an outer frame mold in which a molding part is formed,
An upper punch-like upper punch that allows insertion and removal from the upper opening of the outer frame mold,
A lower punch-shaped lower punch that allows a hollow shaft part to be inserted into the molded part from the bottom opening of the outer frame mold and allows advancement and retraction;
Forms a die set in which a vertically movable core rod penetrating from the bottom to the top of the hollow shaft portion of the lower punch fitted in the outer frame die is integrated in a skewered shape, and a disc shape A core that can be made independent by the base of
Heating means for heating the raw material powder filled in the molded part;
A press means for compressing the raw material powder filled in the molding part by pressurizing the upper punch and the lower punch fitted in the outer frame mold in a direction to approach, and molding a powder compact; With
As a deburring mechanism for removing burrs fixed to the vicinity of the inner diameter portion of the outer frame mold after molding the powder compact,
A deburring base that can hold and hold the mold set in a state in which the upper punch is removed;
A core part vertical drive means for moving the core part up and down in a state where the outer frame mold and the lower punch are fixed to the deburring base;
A powder molding die apparatus for removing the burrs by driving the core part vertical drive means before filling the raw material powder.   2. The powder molding die apparatus according to claim 1, wherein the deburring mechanism includes an air blow that blows off a burr peeled off from the vicinity of the inner diameter portion of the outer frame mold. A powder molding die apparatus for molding a powder molded body by heating and compressing raw material powder filled in an outer frame mold in which a molding part is formed,
An upper punch-like upper punch that allows insertion and removal from the upper opening of the outer frame mold,
A lower punch-shaped lower punch that allows a hollow shaft part to be inserted into the molded part from the bottom opening of the outer frame mold and allows advancement and retraction;
Forms a die set in which a vertically movable core rod penetrating from the bottom to the top of the hollow shaft portion of the lower punch fitted in the outer frame die is integrated in a skewered shape, and a disc shape A core that can be made independent by the base of
Heating means for heating the raw material powder filled in the molded part;
A press means for compressing the raw material powder filled in the molding part by pressurizing the upper punch and the lower punch fitted in the outer frame mold in a direction to approach, and molding a powder compact; With
As a weighing and filling mechanism for weighing and filling the raw material powder by a specified amount,
A filling machine that grips the funnel-shaped powder chute and moves up and down;
A guide column that supports the filling machine so that it can move up and down and can be stopped and held;
A mold set with the upper punch removed;
A precision weigher that is located directly below the vertical line of the filling machine and is capable of weighing by placing the mold set;
The weighing and filling mechanism includes:
Place the mold set on the precision weigher and wait for a predetermined position in a state where it can be measured,
From the powder chute to the mold set waiting at the predetermined position, it is determined from the detection output of the precision weighing instrument that the input amount of the raw material powder has reached a specified weight, and from the powder chute A powder mold apparatus characterized by stopping the charging.   The filling machine of the weighing and filling mechanism includes a charging position regulating body that regulates a charging direction of the raw material powder from the powder chute to only the molding part of the outer frame mold, and powder of the powder chute 4. The powder molding die apparatus according to claim 3, wherein the powder molding mold apparatus is provided near the dropping port. Powder molding is performed by compressing the raw material powder filled in the molding part formed by the piston-like lower punch and upper punch being respectively fitted to the upper and lower sides of the cylindrical outer frame mold by the lower punch and the upper punch. A powder molding method based on a powder metallurgy method for molding a body,
Preparing a mold set in which a core rod capable of moving up and down penetrating the shaft center of the hollow shaft portion of the lower punch fitted to the outer frame mold is inserted into a skewer;
Loading the mold set that is conveyed in a state where the upper punch is not fitted into the deburring mechanism;
Removing the burrs that remain attached to the vicinity of the inner diameter part of the outer frame mold by driving the core part vertical drive means to move the core part up and down;
After deburring, placing the mold set on the weighing platform of the precision weigher and feeding the raw material powder;
Feeding the mold set filled with the raw material powder to an ultrasonic filling mechanism.

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