JP4114931B2 - Raw material powder molding apparatus and method of conveying molded body - Google Patents

Description

  BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a raw material powder molding apparatus and a method for conveying a molded body thereof, and in particular, a raw material powder molding apparatus such as an R-MB system alloy powder for rare earth sintered magnets and the production and conveyance of the molded body Regarding the method.

  A rare earth sintered magnet is manufactured by melting a raw metal and using a powder metallurgy technique such as pulverization, molding, sintering, heat treatment, processing, etc., as a bulk or ribbon-shaped raw material alloy. Among rare earth sintered magnets, R-MB-based rare earth sintered magnets (R is one or more of rare earth elements, M is essentially Fe (iron), and contains other metal elements. B is boron) Note that rare earth elements include Y (yttrium), and B may be partially substituted by C (carbon).

However, since the alloy powder for rare earth sintered magnet obtained by pulverization is chemically active, it rapidly oxidizes in the atmosphere, increasing the amount of oxygen contained therein, leading to deterioration of magnetic properties. The same applies to a molded body obtained by molding the raw material powder.
Therefore, it was necessary to store the raw material powder and the compact in an inert gas such as nitrogen gas or argon between the production of the raw material powder and the firing of the compact.

  In order to solve such a problem, a technique is disclosed in which press molding is performed in an inert gas atmosphere, and the compacts are individually conveyed by a belt and flowed directly from the molding process to the firing process (see Patent Document 1).

  However, rather than flowing (conveying) the compacts individually into the firing process, a large number of compacts are placed on a predetermined tray, etc., and when a certain amount of compacts are stored on the tray, they are collectively transported to the firing process. The efficiency of the firing process is better.

  A molding / baking apparatus employing such a conveying method is disclosed in Patent Document 2. In the molding / baking apparatus disclosed in Patent Document 2, a molded body molded by pressing is placed on one end of a belt conveyor by a robot, and conveyed by the belt conveyor. It arranges on the base plate for baking (baking tray) conveyed on the belt conveyor.

  In the system disclosed in Patent Document 2, a swivel-type transfer robot provided with suction nozzles transfers a molded body from a belt conveyor to a baking base plate. However, in such a configuration, the swivel range of the belt conveyor or the transfer robot becomes large. For this reason, when such a transport mechanism is applied to an atmosphere control type apparatus as disclosed in Patent Document 1, the size of the processing container filled with an inert gas becomes large, and it becomes difficult to control the atmosphere. In addition, problems such as easy gas waste occur.

Further, in order to transport the molded body by such a transport robot, it is necessary to detect the exact position and the center of gravity (shape) of the molded body that has been demolded. For this reason, in patent document 2, the position and shape of a molded object are discriminate | determined by the image recognition of the image imaged with the camera, an apparatus structure is complicated and control is difficult.
In the following description, inert gases such as nitrogen gas and argon are collectively referred to as non-oxidizing gases. Further, pure oxygen gas or gas containing oxygen, for example, gas such as air is generically referred to as oxygen gas.
JP-A-6-346102 (FIGS. 1 and 3) JP 2002-83729 A (paragraph 0079, FIG. 8)

The present invention has been made in view of the above circumstances, and provides an apparatus and a method for forming a rare earth sintered magnet alloy powder capable of improving the magnetic properties and safety of a rare earth sintered magnet. The purpose is to provide.
Another object of the present invention is to provide a method for conveying a molded body that is simple in configuration and easy to control.

In order to achieve the above object, a molding apparatus according to the first aspect of the present invention comprises:
An atmosphere control room with controlled atmosphere;
A pressure forming means provided in the atmosphere control chamber for pressure forming the raw material powder;
A conveying unit that is provided in the atmosphere control chamber, takes out a molded body from the pressure molding unit, moves in a uniaxial direction between the pressure molding unit and a predetermined container, and transports the molded body to the predetermined container. When,
It is provided in the atmosphere control chamber, places the predetermined container, and moves in a direction perpendicular to the moving direction of the conveying means in a horizontal plane, or in a direction parallel to and perpendicular to the moving direction of the conveying means in a horizontal plane. Container moving means for moving each;
It is characterized by providing.

The conveying means preferably comprises a servo motor, and means for moving the axial direction by the power of the servo motor, and means for controlling the servo motor.

It said container moving means, by a servomotor, said vertically to move, or their respective to move the parallel direction and the perpendicular direction.

Comprising a deburring device disposed in the atmosphere control chamber, said conveying means, said taken out the green body from the pressure forming means is conveyed to the deburring device, formed article after deburring treatment with deburring machine May be conveyed to the predetermined container.

The deburring device removes burrs formed during pressure molding from the molded body by , for example, spraying a high-pressure non-oxidizing gas on the molded body.

In the atmosphere control chamber, a direction changing device for changing the direction of the molded body is arranged,
The conveying means may take out the molded body from the molding means, convey it to the direction changing device, and convey the molded body whose direction has been changed by the direction changing device to the predetermined container .

The direction changing device may include a rotation plate that rotates about a rotation axis that extends in a direction perpendicular to the moving direction of the conveying means in a horizontal plane. In this case, when the molded body is transported onto the rotating plate by the transporting means, the rotating plate is rotated to change the direction of the molded body.

Moreover, the conveyance method of the molded object which concerns on the 2nd viewpoint of this invention is as follows.
In atmosphere controlled atmosphere control chamber, a conveying step of conveying the containers placed in position by the molded body formed by pressure forming means, transfer means,
A container moving step of moving the placed container by the container moving means,
In the conveying step, the molded body is conveyed by moving in a uniaxial direction between the pressure forming means and a predetermined container,
In the container moving step, the container moves in a direction perpendicular to the moving direction of the conveying means in a horizontal plane, or moves in a direction parallel to and perpendicular to the moving direction of the conveying means in a horizontal plane ,
It is characterized by that.

Wherein the conveying step, the movement of the conveyor means to the axial direction by the power of the servo motor.

In the container moving step , the container is moved by moving the container moving means in the vertical direction, the parallel direction, and the vertical direction by the power of the servo motor.

In the atmosphere control chamber, the molded body taken out from the pressure forming means by the conveying means may have a turning step of turning the direction of the molded body by turning device.

  You may have the carrying-out process which carries out the said container which mounted the said molded object out of the said atmosphere control chamber.

According to the apparatus of the present invention, it is possible to prevent a situation where the molded body comes into contact with outside air until the molded body is conveyed to the firing furnace.
Further, the operating space does not become large, and further, it can be transported with space saving, high speed, and high accuracy without requiring an accompanying device such as a camera device.

  An apparatus for molding a rare earth sintered magnet alloy powder and a method for conveying a molded body according to an embodiment of the present invention will be described with reference to the drawings.

  The molding apparatus 1 according to this embodiment includes a tank 11, a powder supply unit 12, a mold 13, a mold transport cylinder 14, an upper punch 15, and a lower punch 16 in an atmosphere control chamber 10. A press machine 18 as pressure forming means having a magnetic field coil 17, a molded body take-out device (transport device) 19 as a transport means, a deburring device 20, a direction changing device 21, and a molded body as a container. A baking tray 22 for loading, a stage 23 for loading the baking tray 22 as a container moving means, a non-oxidizing gas introduction unit 24, and oxygen concentration detection sensors 25 and 26 are provided.

The atmosphere control chamber 10 has an atmosphere of a non-oxidizing gas inside, and the alloy raw material powder of the R—M—B system rare earth sintered magnet whose main component is an Nd ₂ Fe ₁₄ B compound or the like and its molded body PE are air ( It is provided to shield from (oxygen).

The tank 11 has airtightness, and contains, for example, an alloy raw material powder of an RMB-based rare earth sintered magnet whose main component is an Nd ₂ Fe ₁₄ B compound or the like.

  The powder supply unit 12 is composed of a cylindrical body, and is connected to the tank 11 through a valve 31 with airtightness.

  The mold 13 is filled with raw material powder. A lubricant is applied to the inner surface of the mold 13. As the lubricant, an organic lubricant is suitable, and for example, a fatty acid ester or the like is used.

  Here, the reason why the lubricant is applied to the inner surface of the mold 13 will be described. First, the raw material powder for the R-MB-based rare earth sintered magnet cannot be added with a large amount of lubricant because of its deterioration in magnetic properties (coercive force) or strength due to carbon. When the molded body PE is extracted, galling occurs due to friction with the inner surface of the mold 13. For this purpose, a lubricant is applied to the inner surface of the mold 13 in order to improve the sliding between the raw material powder and the inner surface of the mold 13.

  In addition, it is difficult to stably inject and fill a certain weight of raw material powder into the mold 13. Variation in the amount of the raw material powder filled in the mold 13 leads to variation in the weight of the molded body PE after molding, dimensional variation in the sintered body, etc. It will cause a weight defect. For this purpose, a lubricant is applied to the inner surface of the mold 13 so that the raw material powder can be stably injected and filled.

  In addition, a magnetic field is applied to the raw material powder injected into the mold 13 to orient the raw material powder particles. Therefore, it is necessary to facilitate the orientation of the raw material powder in the mold 13 by some means with the orientation magnetic field applied. As a means for that, a lubricant is applied to the inner surface of the mold 13.

  In order to improve the orientation of the raw material powder in the mold 13, a vibration source is arranged on the mounting table 32 of the mold 13, and when the raw material powder is filled in the mold 13, May be vibrated.

  The die conveying cylinder 14 conveys the die 13 from the raw material powder injection filling position where the raw material powder is injected and filled into the die 13 on the mounting table 32 to a position between the upper punch 15 and the lower punch 16 of the press machine 18. In order to achieve this, a horizontal reciprocation is performed between the raw material powder injection filling position and the position between the upper punch 15 and the lower punch 16.

  The press machine 18 includes an upper punch 15 and a lower punch 16. An orientation magnetic field coil 17 is provided at a position facing the lower punch 16 of the upper punch 15, and the molded body PE is molded by pressure molding the raw material powder while applying the orientation magnetic field.

  The compact body take-out device (conveyance device) 19 reciprocates in a uniaxial direction between the table 33 of the press machine 18 and the firing tray 22, and the compact body PE is transferred from the mold 13 on the press machine 18 to the firing tray 22. Transport to.

  The deburring device 20 is composed of, for example, a blast device, and removes burrs by blowing high-pressure gas to the molded body PE.

  The direction changing device 21 includes a rotating plate 21a, and changes the orientation of the molded body PE arranged horizontally on the rotating plate 21a to the vertical direction by rotating and tilting the rotating plate 21a. It is set in an upright state to facilitate placement on the baking tray 22.

The firing tray 22 is a container for accommodating the molded body PE in order to transport the molded body PE to a subsequent firing step. If the molded body PE can be arranged, arranged, and maintained, the shape, material, and size thereof are Is optional. On the baking tray 22, the molded bodies PE are aligned and arranged in an upright state. The molded body PE is placed in an upright state using the direction changing device 21, but may be placed on the baking tray 22 in the horizontal direction. The baking tray 22 is placed on the stage 23.
In addition, although not shown in figure, the carrying-out apparatus for transferring the baking tray 22 to a baking process is arrange | positioned.

  A non-oxidizing gas introduction unit 24 as a gas introduction mechanism is connected to the atmosphere control chamber 10. The non-oxidizing gas introduction unit 24 includes a non-oxidizing gas introduction pipe for introducing a non-oxidizing gas (an inert gas such as nitrogen gas or argon) into the atmosphere control chamber 10, a control valve (35), and a non-oxidizing gas. The atmosphere control chamber 10 is controlled (nitrogen) by supplying a non-oxidizing gas, for example, nitrogen gas, to the atmosphere control chamber 10. This is because the molded body PE immediately after molding has its surface exposed to the atmosphere and undergoes an oxidizing action, so that the magnetic properties deteriorate. In particular, when a raw material powder containing an active rare earth element and having a low oxygen content or a molded body PE using this raw material powder is exposed to the atmosphere, even ignition occurs. Therefore, the atmosphere is controlled in the atmosphere control chamber 10 in which the molded body PE or the firing tray 22 on which the molded body PE is placed is accommodated. Furthermore, in order to prevent the raw material powder and the molded body PE from being oxidized before and after molding, and to take safety measures such as a fire, an atmosphere is used to block the raw material powder and the molded body PE from the atmosphere. The control room 10 is controlled to the atmosphere.

  In order to detect the oxygen concentration in the atmosphere control chamber 10, different types of oxygen concentration detection sensors are provided. For example, one is composed of a galvanic sensor 25 and the other is composed of a zirconia (Zr) sensor 26. Detection is performed by a galvanic sensor 25 and a zirconia sensor 26 in accordance with the oxygen concentration in the atmosphere control chamber 10. The oxygen concentration to be switched between the galvanic sensor 25 and the zirconia sensor 26 may be in the range of 500 ppm to 2%, and more preferably in the range of 1000 ppm to 1%. As described above, since an organic lubricant is applied to the inner surface of the mold 13, organic gas components are scattered in the atmosphere control chamber 10. The zirconia sensor 26 can accurately detect the oxygen concentration if the oxygen concentration is relatively high. However, if the oxygen concentration falls below a certain level (about 500 ppm), the detection sensitivity is sensitive to measurement in an atmosphere containing an organic gas component. Is unsuitable for falling. On the other hand, the galvanic sensor 25 is not affected by the atmosphere containing the organic gas component, but is unsuitable for measuring an oxygen concentration of 2% or more because it dislikes oxidation. Therefore, each sensor is used in accordance with the oxygen concentration, and as an example, the oxygen concentration is detected by the zirconia sensor 26 in a state where the oxygen concentration is about 5000 ppm or more, with the oxygen concentration being about 5000 ppm as a boundary. In a state where the oxygen concentration is about 5000 ppm or less, the galvanic sensor 25 detects the oxygen concentration. Specifically, when the oxygen concentration is decreasing, the oxygen concentration measured by the zirconia sensor 26 is decreased to 5000 ppm, and switching to oxygen concentration detection by the galvanic sensor 25 may be performed. On the contrary, when the oxygen concentration is increasing, the detection may be switched to detection by the zirconia sensor 26 when the oxygen concentration measured by the galvanic sensor 25 reaches 5000 ppm. When the oxygen concentration is within the range, the oxygen concentration may be detected by both the galvanic sensor 25 and the zirconia sensor 26. While the oxygen concentration detected by both sensors is compared / calculated by the control unit 51, for example, the oxygen concentration in the atmosphere control chamber 10 may be switched at 5000 ppm as one reference value.

  By measuring the oxygen concentration with these sensors and adjusting the control valve 35, the oxygen concentration in the atmosphere control chamber 10 can be controlled to a certain level.

  Further, a control unit 51 is disposed in the atmosphere control chamber 10. The control unit 51 includes a CPU (Central Processing Unit), a memory that stores an operation program, and the like. The supply of the raw material powder from the tank 11 to the mold 13, the transfer by the mold transfer cylinder 14, and the orientation magnetic field coil 17 Application of orientation magnetic field, press processing by the press 18, conveyance by the take-out device 19 (means for controlling each servo motor), deburring by the deburring device 20, direction change by the direction changing device 21, and position of the stage 23 Control, fetching of measured values of the oxygen concentration detection sensors 25 and 26, adjustment / control of the opening degree of the control valve 35, and the like are collectively executed.

  Next, the take-out device 19, the deburring device 20, the direction changing device 21, the baking tray 22, and the stage 23 will be described in more detail.

  As shown in FIG. 1, the take-out device 19 includes a table 191, an arm 192 extending horizontally from the table 191, a head 193 disposed at the tip of the arm 192, a hand 194 extending vertically from the head 193, It comprises a finger (clamping portion) 195 disposed at the tip of the hand 194.

  The arm 192 extends and contracts horizontally and uniaxially, and the hand 194 extends and contracts vertically and uniaxially from the head 193. The finger 195 opens and closes to grip (hold) the molded body PE.

As shown in FIGS. 2A and 2B, the arm 192 and the hand 194 are driven by servo motors 201 and 203 via corresponding single-axis drive mechanisms 202 and 204. Further, as shown in FIG. 2C, the finger 195 is driven to open and close by the servo motor 205 via the opening / closing mechanism 206. The opening / closing drive may be an air chuck.
The drive servo motor may be an AC (alternating current) servo motor or a DC (direct current) servo motor. However, a powder other than the raw material powder, for example, a motor brush polishing powder is not generated, and a brushless type servo motor that can keep the atmosphere control chamber 10 clean, for example, an AC servo motor is desirable.

  As shown in a plan view in FIG. 3, the table 33 of the press machine 18, the deburring device 20, the direction changing device 21, and the firing tray 22 are arranged in a straight line in the expansion / contraction direction (x-axis direction) of the arm 192. The molded body PE can be transported between these apparatuses by movement of the head 193 in one axial direction.

  As described above, the direction changing device 21 causes the molded body PE to stand upright by rotating the rotating plate 21a about the rotating shaft extending in the direction perpendicular to the moving direction of the arm 192. The rotating plate 21a is driven by a servo motor 207 through a rotating mechanism 208 as shown in FIG. This drive may be a rotary actuator.

  The stage 23 is configured to be able to move in the y direction (a direction perpendicular to the moving direction of the arm in a horizontal plane) on which the baking tray 22 is placed. The position at which the molded body PE of the take-out device 19 is released (released) can move in the x direction (parallel to the movement direction of the arm 192 in the horizontal plane), but in the y direction (perpendicular to the movement direction of the arm in the horizontal plane). 3 is fixed as shown in FIG. 3, and the stage 23 can be moved only uniaxially by adjusting the release position of the take-out device 19 which is the current placement position of the molded body PE on the baking tray 22 in the y direction. By using the take-out device 19 that cannot be used, positioning can be performed with high accuracy, and a large number of molded bodies PE can be arranged in a matrix at narrow intervals. As shown in FIG. 2E, the stage 23 is also driven in the y direction by the servo motor 211 via the (uniaxial) moving mechanism 212 in the y direction (perpendicular to the moving direction of the arm in the horizontal plane). . Of course, the stage 23 may be configured to be movable in the x direction and the y direction. By being configured to be movable in the x direction, the moving distance of the arm 192 can be shortened, and the take-out device 19 can be downsized.

Next, the operation of forming the rare earth sintered magnet powder by the forming apparatus 1 and carrying it out to the sintering process will be described.
The following operations are all executed under the control of the control unit 51. However, in order to facilitate understanding, reference to the control unit 51 one by one is avoided.

  First, the valve 31 is opened for a predetermined time, and a predetermined amount of raw material powder is injected and filled from the powder supply unit 12 into the mold 13 placed at the raw material powder injection and filling position on the mounting table 32. At this time, the raw material powder in the mold 13 may be vibrated in the mold 13 on the mounting table 32 by a vibration source (not shown).

  Subsequently, the die 13 filled with the raw material powder is transferred from the raw material powder injection filling position to a position between the upper punch 15 and the lower punch 16 of the press machine 18 by the die transfer cylinder 14.

  While applying an orientation magnetic field by the orientation magnetic field coil 17, the upper punch 15 is lowered to pressurize and compress the raw material powder filled in the mold 13. The compression-molded molded body PE is pushed out to the upper surface of the mold 13 (demolded) by the ascent of the lower punch 16.

  The demolded molded body PE is taken out by the molded body take-out device 19 and conveyed onto the baking tray 22.

This conveyance operation will be described with reference to the procedure flow of FIG. 4 and FIGS.
The controller 51 has means for controlling each servo motor. As shown in FIG. 5A, the servo motor 201 is controlled to extend the arm 192 to the press machine 18, and then the servo motor 203 is controlled to extend the hand 194 downward to form the molded body PE. Grip (hold). Subsequently, as shown in FIG. 5B, the hand 194 is contracted, the arm 192 is contracted, the head 193 is moved onto the deburring device 20, and the hand 194 is lowered, as shown in FIG. 5C. Then, the molded body PE is conveyed into the deburring device 20 (FIG. 4, step S1).

  The deburring device 20 removes the burrs formed at the time of pressing, for example, by spraying a high-pressure non-oxidizing gas on the molded body PE (step S2).

  Subsequently, as shown in FIG. 6D, the molded body PE after the deburring is gripped by the fingers 195 and conveyed onto the rotating plate 21a of the direction changing device 21 (step S3).

Subsequently, as shown in FIGS. 6E and 6F, the rotating plate 21a is rotated / inclined about the rotating shaft extending in the y-axis direction, and the molded body PE is erected (step S4).
Subsequently, as shown in FIG. 7G, the upright molded body PE is gripped, the arm 192 is moved, and the molded body PE is conveyed to the release position as shown in FIG. 7H. , Release (release). At this time, the servo motor 211 controls the y position of the stage 23 in accordance with an instruction from the control unit 51, and moves the current molding placement position of the baking tray 22 to the release position of the take-out device 19. Thereby, the molded object PE is arrange | positioned in the upright state in the desired position of the baking tray 22 (step S5).

  Thus, in the molding apparatus 1, the take-out device 19 itself can only move uniaxially in the horizontal direction, and the release position of the molded body PE is fixed. However, for example, the molded body PE is placed on the firing tray 22 and the matrix with simple control by placing the molded body PE while shifting the stage 23 by a predetermined distance in the y direction in synchronization. It is possible to accurately position and arrange at a narrow interval.

  The formed bodies PE aligned on the baking tray 22 are stored in the atmosphere control chamber 10 until the formed bodies PE for one tray are placed (step S6).

  When a predetermined number of the molded bodies PE for one tray are arranged, the firing tray 22 is further carried out to the firing step by, for example, a transport vehicle in which a non-oxidizing gas is enclosed.

  For this reason, since raw material powder and molded object PE are not oxidized, the rare earth sintered magnet controlled by minute oxygen content can be obtained. As a result, the magnetic properties of the rare earth sintered magnet can be improved.

In this embodiment, since the take-out device 19 has a configuration that can move in one axis in the horizontal direction, a robot arm that can move in any direction and position of x, y, z, and axes in multiple axes is used. Compared to the case, the operating space is not increased, the capacity of the atmosphere control chamber can be reduced, and the maintenance and management of the atmosphere can be facilitated. In addition, the molded bodies PE can be arranged on the firing tray 22 with high positioning accuracy without requiring an accessory device such as a camera.
In addition, accurate positioning is possible by using a servo motor as the driving means.

  The present invention has been described with reference to the embodiment. However, the present invention is not limited to the above embodiment, and various modifications can be made. For example, in the above-described embodiment, an example in which one galvanic sensor 25 and one zirconia sensor 26 are provided in the atmosphere control chamber 10 as oxygen concentration detection sensors has been described. However, the type and number of sensors are arbitrary.

  Moreover, in the said embodiment, although the example which injects and fills raw material powder in the metal mold | die 13 was demonstrated, it was made to supply raw material powder in the filling box 60 using the filling box 60 instead of the metal mold | die 13. Also good. In this case, as shown in FIG. 8, the mold 13 is a die 13B, and the mold transport cylinder 14 is a filling box transport cylinder 14A. The rest of the configuration is almost the same as the schematic diagram of FIG. The powder supply unit 12 connected to the tank 11 weighs and supplies a certain amount of raw material powder into the filling box 60 placed at the raw material powder injection filling position on the mounting table 32. The filling box 60 supplied with the raw material powder is conveyed from the raw material powder injection filling position to a position between the upper punch 15 and the lower punch 16 of the press machine 18 by the filling box conveying cylinder 14A. The filling box conveying cylinder 14 </ b> A reciprocates in the horizontal direction between the raw material powder injection filling position on the mounting table 32 and the position between the upper punch 15 and the lower punch 16 of the press machine 18. The die 13B is provided on the table of the press machine 18, and the die 13B is moved up (relatively the lower punch 16 is lowered) to transport the filling box 60 onto the cavity of the die 13B and fill the cavity of the die 13B. Raw material powder is injected and filled from the box 60. While applying an orientation magnetic field by the orientation magnetic field coil 17, the upper punch 15 is lowered (the lower punch 16 is fixed) to apply pressure, and the raw material powder is pressed to obtain a compact PE. The compression-molded molded body PE is extracted from the die 13B by lowering the die 13B (relatively raising the lower punch 16). As described above, an organic lubricant may be applied to the inner surface of the die 13B. For example, the powder supply unit 12 may include a weighing machine (not shown) and weigh a certain amount.

Further, the configuration of the take-out device 19, the configuration of the deburring device 20, the configuration of the direction changing device 21, and the configuration of the stage 23 are not limited to the above-described configurations.
For example, the finger 195 of the take-out device 19 may be rotated with the hand 194 as a rotation axis.

Further, the molded body PE held horizontally by the fingers 195 of the take-out device 19 may be moved vertically (rotated) and conveyed to the baking tray 22 in that state.
Further, the motors as drive sources are not limited to rotary motors, and brushless, for example, linear motors can also be used.
The deburring device 20 and the direction changing device 21 are not essential components and may be arranged as necessary.

  Although the example which conveys molded object PE to the baking tray 22 with the taking-out apparatus 19 was demonstrated, this invention is not limited to this, In order to convey a molded object PE to a post process, arbitrary places, positions, and containers It can be widely applied to mechanisms and configurations arranged and arranged in

A rare earth sintered magnet was manufactured using the molding apparatus 1 described above.
First, a molded body PE was obtained from the raw material powder obtained by pulverization according to the aforementioned flow. That is, the raw material powder was filled in the mold 13, an electric current was passed through the orientation magnetic field coil 17, the raw material powder was oriented with an orientation magnetic field strength of 15 kOe, and was pressed by the press machine 18 in that state. Then, after turning off the current for the orientation magnetic field, the molded body PE is taken out, while the molded body PE is conveyed by the take-out device 19, deburring is performed by the deburring device, and the direction is changed by the direction changing device. Aligned and arranged on 22 and temporarily stored in the atmosphere control chamber 10.

  Then, the general sintering process (For example, the baking tray 22 was inserted in the sintering furnace, and it hold | maintained at the maximum temperature of 1100 degreeC for 2 hours in the vacuum, and cooled after that). The obtained sintered body was aged at 900 ° C. for 1 hour and at 600 ° C. for 1 hour, and then the oxygen amount, carbon amount, and magnetic properties of the sintered body were measured, and sufficient characteristics were obtained.

It is a schematic diagram of the shaping | molding apparatus of the alloy powder for rare earth sintered magnets concerning embodiment of this invention. It is a block diagram for demonstrating the structure of a taking-out apparatus, a direction change apparatus, and a stage. It is a top view for demonstrating arrangement | positioning relationship between a press machine, a taking-out apparatus, a deburring apparatus, a direction change apparatus, and a stage. It is a flowchart which shows the procedure which conveys a molded object. It is a figure which shows the operation | movement which conveys a molded object. It is a figure which shows the operation | movement which conveys a molded object. It is a figure which shows the operation | movement which conveys a molded object. It is a schematic diagram of the shaping | molding apparatus of the alloy powder for rare earth sintered magnets concerning other embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Molding apparatus 10 Atmosphere control room 13 Mold 15 Upper punch 16 Lower punch 17 Coil for orientation magnetic field 18 Press machine 19 Extraction apparatus 22 Firing tray 23 Stage 24 Non-oxidizing gas introduction unit 25 Galvanic sensor 26 Zirconia sensor 35 Control valve 51 Control unit

Claims (12)

An atmosphere control room with controlled atmosphere;
A pressure forming means provided in the atmosphere control chamber for pressure forming the raw material powder;
A conveying unit that is provided in the atmosphere control chamber, takes out a molded body from the pressure molding unit, moves in a uniaxial direction between the pressure molding unit and a predetermined container, and transports the molded body to the predetermined container. When,
It is provided in the atmosphere control chamber and places the predetermined container and moves in the horizontal direction in a direction perpendicular to the moving direction of the conveying means, or in the horizontal plane in a direction parallel to and perpendicular to the moving direction of the conveying means. Container moving means for moving each;
An apparatus for forming a raw material powder, comprising: Said conveying means includes a servo motor, said comprising means for moving the axial direction by the power of the servo motor, and means for controlling said servo motor, that molding of the raw material powder according to claim 1, wherein apparatus. Said container moving means, by a servomotor, the vertical direction to move, or the parallel direction and moving their respective transfers to the vertical direction, the raw material powder according to claim 1 or 2, characterized in that Molding equipment. A deburring device disposed in the atmosphere control chamber;
The said conveying means takes out the said molded object from the said pressure forming means, conveys it to the said deburring apparatus, and conveys the molded object after the deburring process by a deburring apparatus to the said predetermined container, It is characterized by the above-mentioned. Item 4. The raw material powder molding apparatus according to any one of Items 1 to 3 . The said deburring apparatus removes the burr | flash formed at the time of pressure forming from a molded object by spraying a high pressure non-oxidizing gas on the said molded object, The raw material powder shaping | molding apparatus of Claim 4 characterized by the above-mentioned. . The atmosphere control chamber further includes a direction changing device for changing the direction of the molded body,
The said conveyance means takes out the said molded object from the said shaping | molding means, conveys it to the said direction change apparatus, and conveys the molded object from which direction was changed by this direction change apparatus to the said predetermined container, It is characterized by the above-mentioned. 6. The raw material powder molding apparatus according to any one of 1 to 5 . The direction changing device includes a rotation plate that rotates about a rotation axis that extends in a direction perpendicular to the moving direction of the conveying means in a horizontal plane,
The raw material powder according to claim 6 , wherein when the compact is transported on the rotating plate by the transporting means, the rotating plate is rotated to change the direction of the compact. Molding equipment. In an atmosphere controlled atmosphere control chamber, a conveying step of conveying the containers placed in position by the molded body formed by pressure forming means, transfer means,
A container moving step of moving the placed container by the container moving means,
In the conveying step, the molded body is conveyed by moving in a uniaxial direction between the pressure forming means and a predetermined container,
In the container moving step, the container moves in a direction perpendicular to the moving direction of the conveying means in a horizontal plane, or moves in a direction parallel to and perpendicular to the moving direction of the conveying means in a horizontal plane ,
A method for transporting a molded body characterized by the above. Wherein in the conveying step, to move the conveying means by the power of the servo motor to the uniaxial direction, the transport method of the molded body according to claim 8, characterized in that. In the container moving step, moving each container moving means by the power of the servo motor the vertical direction, or the direction parallel and the perpendicular direction to move the vessel, it to claim 8 or 9, characterized in A method for conveying the molded body according to the description. In the atmosphere control chamber, the molded body taken out from the pressure forming means by the conveying means, having a direction change step of converting the direction of the molded body by turning device, according to claim 8 to 10, characterized in that The conveyance method of the molded object of any one of Claims 1. The method for transporting a molded body according to any one of claims 8 to 11 , further comprising an unloading step of unloading the container carrying the molded body out of the atmosphere control chamber.

Images