JP5342175B2 - Powder layer forming equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a thin powder layer in which the pack density of a molding powder is uniformized over the whole region in an annular cavity. <P>SOLUTION: The apparatus for forming a powder layer includes a molding die 2 having an annular cavity K, a holder 3 that rotates forward and backward and that rises intermittently or continuously from a state descended to a lowered position, and a rake 34 that is held by the holder 3 and that has a blade 40 for revolving inside the annular cavity K. The blade 40 makes an inner end edge 40a approach to the inner circumferential wall 2a of the molding die 2 as well as making the outer end edge 40f approach to the outer circumferential wall 2b of the molding die, with the lower end edge 40b extended along the annular bottom face Kd of the annular cavity K. A crossing angle &theta; in the longitudinal direction of the blade relative to the radial direction R extending from the vertical center line C is set such that a powder body e is moved outward while moving it in the revolving direction using the forward rotation of the holder 3 and that the powder body e is moved inward while moving it in the revolving direction using the backward rotation of the holder 3. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a molding powder (for example, a sintered alloy) filled in an annular cavity formed between an outer peripheral wall surface and an inner peripheral wall surface of a mold or a circular cavity formed inside the outer peripheral wall surface of the mold. A powder layer suitable for obtaining a thin powder layer (for example, a thickness dimension of 3.0 to 5.0 mm or less) by dispersing powder or porcelain powder) in an annular cavity or a circular cavity. The present invention relates to a molding apparatus.

  In the powder pressure molding method, a thin filling layer is formed by filling a molding powder in an annular cavity or a circular cavity with a powder feeder, and the thin filling layer is pressure-molded to form a thin donut. Some of them have a perforated disk or a thin disk. For example, there is a doughnut-shaped perforated disk obtained by pressure molding using a powder of a sintering alloy or a base material of a disk to sinter a strong cutting wheel or the like.

Conventionally, in a powder supply device, a casing part that constitutes a molding powder supply space in which an opening is provided at the bottom and a molding powder is supplied is arranged so as to reciprocate over a molding die cavity. There is one in which a plate-like member having a main surface is fixed in a direction substantially orthogonal to the reciprocating direction in the molded powder supply space of the casing (Patent Document 1). This powder supply apparatus is suitable for a mold cavity having a depth dimension of 10 mm or less. By reciprocating the casing part on the mold cavity, the powder for molding in the casing part is gravity-induced. A plate-shaped member that is dropped and supplied into the mold cavity and reciprocates together with the casing, and the surface of the molding powder supplied to the mold cavity is leveled by so-called scraping. The powder for molding is uniformly filled into the cavity to obtain a powder layer.
JP 2007-75837 A

  However, the powder supply device is a plate-shaped member that drops the powder for molding in the casing part by gravity and supplies it into the mold cavity, and reciprocates together with the casing part. Since only the surface of the powder is scraped off, it is difficult to make the packing density uniform over the entire area of the mold cavity, resulting in unevenness in the packing density. In particular, in the case where the mold cavity is an annular shape formed between the outer circumferential wall surface and the inner circumferential wall surface, it is very difficult to make the packing density uniform throughout the entire area of the annular cavity in the powder supply device. . Further, when the circular cavity has a large diameter (for example, an outer diameter of 200 mm or more), it is very difficult to make the packing density uniform over the entire area of the circular cavity in the powder supply device.

  Further, when the thickness dimension of the powder layer is as large as about 10 mm, the unevenness of the packing density may be eliminated to some extent by the movement of the powder during pressure molding, but the thickness dimension is 5 to 5 mm. If it is very small, such as 2 mm or less, there is almost no movement of the powder during pressure molding, so the unevenness of the packing density cannot be eliminated, and problems such as cracks occur in the fired product in the subsequent firing process. It will be.

  In order to solve the above problems, the present invention provides a powder layer molding apparatus suitable for obtaining a thin powder layer in which the packing density of the molding powder is uniform throughout the annular cavity or the entire circular cavity. With the goal.

  In order to obtain a thin annular powder layer in which the packing density of the molding powder is uniform over the entire area of the annular cavity, the means employed by the present invention according to claim 1 A mold having an annular cavity surrounded by a circular inner peripheral wall surface and outer peripheral wall surface that are concentric with each other and an annular bottom surface orthogonal to the longitudinal center line, and an upper surface opened, and disposed above the annular cavity, and rotates the longitudinal center line. A holding tool that rotates forward and backward around the center and rises intermittently or continuously from the lowered state to the lowered position, and has an inner blade that is held by the holder and revolves around the inner annular region of the annular cavity and rises. An inner scraper, an intermediate scraper having an intermediate blade that revolves and rises while being held by the holder and revolves around an intermediate annular region of the annular cavity, and an annular cavity held by the holder An outer scraper having an outer blade that revolves around the outer annular region of the die, and the inner blade causes the inner edge to abut or approach the inner peripheral wall of the mold and the lower edge to the annular bottom surface of the annular cavity. The outer blade extends along the annular bottom surface of the annular cavity, the outer blade causes the outer edge to abut or approach the outer peripheral wall of the mold, and the lower edge is annular to the annular cavity. Extending inward along the bottom surface, the revolution trajectory of the outer edge of the inner blade and the revolution trajectory of the inner edge of the outer blade enter the revolution trajectory of the intermediate blade, and in the radial direction extending from the longitudinal center line. The angle at which the blade longitudinal directions of the inner blade, intermediate blade, and outer blade intersect is revolved when the holder revolves in either forward or reverse rotation. The powder in the cavity is moved outward while moving in the revolving direction, and the powder in the annular cavity is moved inward while moving in the revolving direction when revolving by rotating the holder in the other direction. The powder layer forming apparatus is characterized by being set as described above.

  In the powder layer forming apparatus according to claim 1, first, a predetermined amount of the prepared powder is put into the annular cavity of the mold, and then the holder is lowered to the lowered position to hold it. Set the inner scraper, intermediate scraper, and outer scraper held by the tool into the annular cavity so that the lower edge of the blade of each feeder approaches the annular bottom surface of the annular cavity. Subsequently, the annular cavity is obtained by alternately repeating the rotation in one direction and the rotation in the other direction alternately at appropriate time intervals so that the holding tool that rises intermittently or continuously is rotated forward and backward at an appropriate rotational speed. The inner inner powder, intermediate powder, and outer powder are moved in the revolving direction, which is one of the blades, with the corresponding inner scraper, intermediate scraper, and outer scraper. Inside the annular cavity An outward scraping state in which the blade is moved in the outward direction and an inward scraping state in which the blade is moved in the revolving direction, which is the other direction of each blade, are moved inward from the inside of the annular cavity. When the blade lower edge of each scraping tool is separated from the surface of the powder layer, an annular powder layer having a target thickness dimension can be obtained in the annular cavity.

  In order to obtain a thin annular powder layer in which the packing density of the molding powder is uniform over the entire area in the annular cavity, the means adopted by the present invention according to claim 2 A mold having an annular cavity surrounded by a circular inner peripheral wall surface and outer peripheral wall surface that are concentric with each other and an annular bottom surface orthogonal to the longitudinal center line, and an upper surface opened, and disposed above the annular cavity, and rotates the longitudinal center line. A holding tool that rotates forward and backward around the center and rises intermittently or continuously from the lowered state to the lowered position, and has an inner blade that is held by the holder and revolves around the inner annular region of the annular cavity and rises. An inner scraping tool, and an outer scraping tool having an outer blade that is held by the holder and revolves around an annular region on the outer side of the annular cavity, and the inner blade has an inner edge on the inner periphery of the mold. The lower edge extends outwardly along the annular bottom surface of the annular cavity while abutting or approaching the surface, and the outer blade causes the outer edge to abut or approach the outer peripheral wall of the mold and the lower edge is annular of the annular cavity. Extending inward along the bottom surface, the revolution trajectory of the outer edge of the inner blade enters the revolution trajectory of the outer blade, and the longitudinal lengths of the inner blade and the outer blade with respect to the radial direction extending from the longitudinal center line. When the angle at which the directions intersect is revolved by rotation in one of the forward and reverse directions of the holder, the powder in the annular cavity is moved outward while moving in the revolution direction, and the other of the holder is moved. It is a powder layer forming apparatus characterized in that it is set so as to move the powder in the annular cavity in the revolving direction while revolving by rotating in the direction of.

  In the powder layer molding apparatus according to claim 2, first, a predetermined amount of the prepared powder is put into the annular cavity of the molding die, and then the holder is lowered to the lowered position to hold it. Set the inner scraper and outer scraper held by the tool into the annular cavity so that the lower edge of the blade of each feeder approaches the annular bottom surface of the annular cavity. By rotating the holding tool that rises periodically or continuously at the appropriate rotational speed in one direction, which is forward and reverse, and alternately rotating in the other direction at appropriate intervals, the inner powder in the annular cavity The body and the outer side powder are moved outwardly from the inside of the annular cavity while being moved in the revolving direction which is one direction of each blade by the blades of the corresponding inner scraper and outer scraper. Scraping state, The inward scraping state in which the blade is moved in the revolving direction, which is the other direction of the blade, and the inward scraping state in which the blade is moved from the outside to the inside in the annular cavity is alternately performed. When away from the surface, an annular powder layer having a target thickness dimension can be obtained in the annular cavity.

In order to be able to obtain a thin circular powder layer in which the packing density of the molding powder is uniform over the entire area in the circular cavity, the means employed by the present invention according to claim 3 A mold having a circular cavity surrounded by a concentric circular outer peripheral wall surface and a circular bottom surface orthogonal to the vertical center line and having an open top surface, and a mold located above the circular cavity, with the vertical center line as the center of rotation. An inner scraping tool having a holding tool that rotates in a reverse direction and intermittently or continuously rises from a lowered position, and an inner blade that is held by the holding tool and revolves in the circular region closer to the inner side of the circular cavity and rises. An intermediate scraper having an intermediate blade that revolves and rises while being held by the holder and revolves around an intermediate annular region of the circular cavity, and an outer edge of the circular cavity that is held by the holder. An outer scraper having an outer blade that revolves around an annular region, the inner blade passing the longitudinal center line of the mold at or near the inner edge and the lower edge on the outer side along the circular bottom of the circular cavity The intermediate blade extends along the circular bottom surface of the circular cavity, the outer blade causes the outer edge to abut or approach the outer peripheral wall of the mold and the bottom edge along the circular bottom surface of the circular cavity. Extending radially inwardly, causing the revolution trajectory of the outer edge of the inner blade and the revolution trajectory of the inner edge of the outer blade to enter the revolution trajectory of the intermediate blade. And when the angle of the outer blade intersecting with the blade longitudinal direction is revolved by rotating the holder in either the forward or reverse direction, the inside of the circular cavity The powder is moved outward while moving in the revolving direction, and when revolving by rotating the holder in the other direction, the powder in the circular cavity is moved inward while moving in the revolving direction. This is a powder layer forming apparatus characterized by the above.

In the powder layer forming apparatus according to claim 3 , first, a predetermined amount of the prepared powder is put into the circular cavity of the mold, and then the holding tool is lowered to the lowered position to hold the powder layer forming apparatus. Set the inner scraper, intermediate scraper, and outer scraper held by the tool in the circular cavity so that the lower edge of the blade of each lifter approaches the circular bottom of the circular cavity. Then, a circular cavity is obtained by alternately repeating the rotation in one direction and the rotation in the other direction alternately at appropriate time intervals so that the holding tool that rises intermittently or continuously is rotated forward and backward at an appropriate rotational speed. The inner inner powder, intermediate powder, and outer powder are moved in the revolving direction, which is one of the blades, with the corresponding inner scraper, intermediate scraper, and outer scraper. Inside the circular cavity An outward scraping state in which the blade is moved in the outward direction and an inward scraping state in which the blade is moved in the revolving direction, which is the other direction of each blade, are moved inward from the outside in the circular cavity. When the lower edge of the blade of each scraping tool is separated from the surface of the powder layer, a circular powder layer having a target thickness dimension can be obtained in the circular cavity.

In order to obtain a thin circular powder layer in which the packing density of the molding powder is uniform over the entire area in the circular cavity, the means adopted by the present invention according to claim 4 can A mold having a circular cavity surrounded by a concentric circular outer peripheral wall surface and a circular bottom surface orthogonal to the vertical center line and having an open top surface, and a mold located above the circular cavity, with the vertical center line as the center of rotation. An inner scraping tool having a holding tool that rotates in a reverse direction and intermittently or continuously rises from a lowered position, and an inner blade that is held by the holding tool and revolves in the circular region closer to the inner side of the circular cavity and rises. And an outer scraping tool having an outer blade that is held by the holder and revolves around the outer annular region of the circular cavity, and the inner blade is in the middle of the mold at or near the inner edge. The lower edge extends along the circular bottom surface of the circular cavity, and the outer blade causes the outer edge to abut or approach the outer peripheral wall of the mold, and the lower edge extends along the circular bottom surface of the circular cavity. And the inner blade and the outer blade have their revolution trajectory within the revolution trajectory of the outer blade, and the radial direction extending from the longitudinal center line intersects with the blade longitudinal directions of the inner blade and the outer blade. When the angle is revolved by rotation in one of the forward and reverse directions of the holder, the powder in the circular cavity is moved outward while moving in the revolution direction, and the holder is moved in the other direction. In the powder layer forming apparatus, the powder is set to move inward while moving the powder in a circular cavity when revolving by rotation.

In the powder layer forming apparatus according to claim 4 , first, the prepared predetermined amount of powder is put into the circular cavity of the forming die, and then the holder is lowered to the lowered position to hold the powder. Set the inner scraper and outer scraper held by the tool into the circular cavity and set the blade lower edge of each tool closer to the circular bottom of the circular cavity. By rotating the holding tool that rises periodically or continuously at the appropriate rotational speed in one direction, which is forward and reverse, and alternately rotating in the other direction at appropriate intervals, the inner powder in the circular cavity The body and the outer side powder are moved outwardly from the inside of the circular cavity while moving in the revolving direction which is one direction of each blade with the corresponding blades of the inner and outer scrapers. Scraping state, The inward scraping state in which the blade is moved in the revolving direction, which is the other direction of the blade, and the inward scraping state in which the blade is moved from the outside to the inside in the circular cavity is alternately performed. When away from the surface, a circular powder layer with a target thickness dimension can be obtained in the circular cavity.

Means the present invention is employed according to claim 5, the intermediate take-pulling device intermediate blade according to claim 1 or 3 wherein is movably supported to and blade longitudinal possible rotation with respect to the retainer It is a powder filling device.

According to a sixth aspect of the present invention, the inner blade of the inner scraping tool can be rotated with respect to the holder and can be moved in the longitudinal direction of the blade. The powder filling apparatus according to any one of claims 1 to 4, wherein an outer blade of the scraping tool is held so as to be capable of rotating and moving in the longitudinal direction of the blade.

  The powder layer forming apparatus according to the first aspect of the present invention includes a powder in an annular cavity that contacts the inner blade, the intermediate blade, and the outer blade during revolution of the inner scraper, the intermediate scraper, and the outer scraper. As for the movement of the body, it can be dispersed over the entire horizontal direction in the annular cavity by alternately repeating the outer approaching state and the inward approaching state, and each scraper is lifted intermittently or continuously to increase the movement in the annular cavity. Since it can disperse | distribute over the whole shaping | molding area | region of the vertical direction, it becomes suitable for obtaining the thin cyclic | annular powder layer which made the packing density of powder uniform.

  The powder layer forming apparatus according to the present invention as set forth in claim 2 is directed to the movement of the powder in the annular cavity in contact with the inner blade and the outer blade during the revolution of the inner scraper and the outer scraper. Can be distributed over the entire horizontal direction in the annular cavity by alternately repeating the inner and inner alignment states, and can be distributed over the entire molding region in the vertical direction in the annular cavity by raising each scraping tool intermittently or continuously. Since it can be dispersed, it is suitable for obtaining a thin annular powder layer having a uniform powder density.

The powder layer forming apparatus according to the third aspect of the present invention includes a powder in a circular cavity that contacts the inner blade, the intermediate blade, and the outer blade during revolution of the inner scraper, the intermediate scraper, and the outer scraper. About the movement of the body, it is possible to disperse the entire horizontal direction in the circular cavity by alternately repeating the externally and inwardly moving states, and at the same time, intermittently or continuously ascending each scraping tool in the circular cavity. Since it can disperse | distribute over the whole shaping | molding area | region of the vertical direction, it becomes suitable for obtaining the thin circular powder layer which made the packing density of powder uniform.

The powder layer forming apparatus according to the present invention as set forth in claim 4 is a state where the powder is moved in the circular cavity contacting the inner blade and the outer blade during the revolution of the inner scraper and the outer scraper. Can be dispersed over the entire horizontal direction in the circular cavity by alternately repeating the inward and inward states, and by intermittently or continuously raising each scraping tool over the entire longitudinal molding region in the circular cavity. Since it can be dispersed, it is suitable for obtaining a thin circular powder layer having a uniform powder packing density.

The powder layer forming apparatus according to claim 5 adjusts an angle at which the revolving inner blade, intermediate blade and / or outer blade pushes the powder to an optimum state according to characteristics such as fluidity of the powder. be able to.

According to the powder layer forming apparatus of the sixth aspect, the angle of the inner blade and / or the outer blade being pushed forward can be adjusted to an optimum state according to the characteristics such as the fluidity of the powder.

  A powder layer forming apparatus according to the present invention (hereinafter referred to as “the present invention forming apparatus”) will be described based on an embodiment shown in the drawings.

(First embodiment)
1 to 6 show a first embodiment of the molding apparatus of the present invention. FIG. 1 shows the entire molding apparatus 1 of the present invention. FIG. 1 (A) is a plan view. ) Is a front view. 2 shows the inner scraping tool 4, the intermediate scraping tool 5 and the outer scraping tool 6 lowered to the annular cavity K, and FIG. 2A is a plan view in which a part of the holding tool 3 is broken. FIG. 2B is a front view in which a part of the mold 2 is sectioned. FIG. 3 is an enlarged view of the holding tool 3 holding the scraping tools 4 (5, 6). FIG. 3A is a front view, and FIG. 4B is a longitudinal sectional side view. . 4A and 4B show a state where a predetermined amount of the prepared powder e is put into the annular cavity K. FIG. 4A is a plan view and FIG. 4B is a cross-sectional front view. FIG. 5 shows a state in which the powder e in the annular cavity K is scraped by the inner, intermediate and outer scraping tools 4, 5, 6, and FIG. (Clockwise rotation direction) F is a plan view showing an out-fed state in which the powder e is moved from the inside to the outside direction by revolving in the direction F. FIG. It is a top view which shows the inward alignment state moved to an inner direction from the outer side. FIG. 6 shows a state where the powder layer E is formed in the annular cavity K of the mold 2, wherein FIG. 6A is a plan view, and FIG. 6B is a front view of the mold 2.

  As shown in FIGS. 1 and 2, the molding apparatus 1 of the present invention has a molding die 2 having an annular cavity K opened on the upper surface, and is disposed above the molding die 2, and rotates forward and backward and descends to a lowered position D. A holding tool 3 that rises from the upper end and stops at the raised position U (see FIG. 1B), and an inner scavenging tool 4, an intermediate scavenging tool 5, and an outer scavenging tool 6 held by the holding tool 3. The powder e (for example, sintering alloy powder) (see FIG. 4) charged into the annular cavity K of the mold 2 is revolved by forward and reverse rotation of the holder 3 and the annular cavity K is raised. A powder layer E (see FIG. 6) having a uniform packing density and a uniform packing thickness by being scraped by the inner blade 10, intermediate blade 11 and outer blade 12 of the scraping tools 4, 5 and 6 and dispersed in the annular cavity K. To get.

  As shown in FIG. 4, the mold 2 is fixedly installed at a predetermined position of the base 7, and the vertical center line C is concentric and circular, and is perpendicular to the circular inner peripheral wall surface 2 a and outer peripheral wall surface 2 b and the vertical center line C. A concave annular cavity K having a planar donut shape surrounded by the annular bottom surface 2c and having an open top surface is formed. The mold 2 includes a peripheral wall surface forming frame 2d including an inner portion 2d-1 that forms an inner peripheral wall surface 2a and an outer portion 2d-2 that forms an outer peripheral wall surface 2b, and a bottom surface forming lower mold 2e that forms an annular bottom surface 2c. Although not shown in the drawings, the peripheral wall surface forming frame 2d and the bottom surface forming lower mold 2e are formed separately so that they can be moved relative to each other in the vertical direction. The powder e put into the annular cavity K is formed into a powder layer E as described later, and then a molded product (not shown) obtained by pressure molding the powder layer E is placed on the annular bottom surface 2c. In some cases, the mold is exposed to the outside from the annular cavity K to be easily removed. As shown in FIG. 2A, the annular cavity K passes through the inner annular region Ka through which the revolving inner blade 10 passes, the intermediate annular region Kb through which the revolving intermediate blade 11 passes, and the outer outer blade 12 to revolve. The outer circumferential region Kc is divided into the outer circumferential region Kc and the inner circumferential region Ka of the inner circumferential region Ka and the inner circumferential region of the outer annular region Kc enter the intermediate annular region Kb.

  As shown in FIGS. 1 and 2, the holder 3 is attached to an output portion 9 a of a rotating / lifting device 9 that is horizontally swingably attached to a column 8 that is erected from a base 7, and is located above an annular cavity K. Is arranged. The holder 3 rotates forward and backward about the vertical center line C as a rotation center and moves up and down from the lowered position U to the raised position D by the rotation operation and the elevation operation of the output unit 9a of the rotation / lifting device 9. It is like that. In the holding tool 3, the blades 10, 11, and 12 of the held inner, intermediate, and outer scraping tools 4, 5, and 6 revolve in the forward and reverse rotation directions in the annular cavity K to form the powder layer E. Sometimes, the blades 10, 11 and 12 for forming the powder layer E are raised intermittently or continuously from the lowered position in the vertical forming region. The holder 3 is configured to improve the operating efficiency of the molding apparatus 1 of the present invention so that the lifting / lowering in the region other than the vertical molding region is faster than the lifting / lowering speed in the molding region.

  The inner, intermediate, and outer scraping tools 4, 5 and 6 held by the holding tool 3 are moved to the lowering position D when the holding tool 3 is lowered to the lower end edges (blade edges) of the blades 10, 11 and 12, respectively. 10b, 11b, and 12b are stopped at an initial lower position separated from the annular bottom surface 2c of the annular cavity K by an initial height dimension (equivalent to a lifting pitch dimension P described later), and then intermittently or continuously of the holder 3 By raising, the blades 10, 11 and 12 are raised in the vertical forming region, and the lower end edges (blade edges) 10b, 11b and 12b are intermittently or continuously separated from the annular bottom surface 2c of the annular cavity K. It is like that.

  When the rotating / lifting device 9 is configured to intermittently raise the holder 3, the target thickness (powder filling thickness) of the powder layer E (see FIG. 6) dimension T (for example, T = 3. 0 to 5.0 mm) is lifted by a lifting pitch dimension P (for example, P = 0.5 to 1.0 mm) smaller than the lifting tool 3, and then the holding tool 3 is repeatedly raised and stopped repeatedly. Is rotated forward and backward. Further, when the holder 3 is continuously raised and rotated forward and backward, the lifting speed per rotation of the holder 3 can be selected within a range of 1/10 to 1/100 mm, and the rising speed is set. It can be adjusted. The rotating / lifting device 9 can adjust the lifting pitch dimension P of the holder 3 or the ascending speed of the holder 3 in accordance with the type of powder e and the filling thickness T. Furthermore, the rotation / lifting device 9 can adjust the rotation speed of the holder 3 within a range of 60 to 100 rpm, and can select a switching interval between forward and reverse rotations within a range of 15 to 20 seconds.

  As shown in FIG. 2, the inner scraping tool 4 has an inner blade 10 held by a holding tool 3 via an adjusting tool 13, and the inner blade 10 is formed into an annular shape by forward and reverse rotation and raising of the holding tool 3. Revolution and ascending are performed in the annular region Ka closer to the inside of the cavity K. The inner blade 10 is formed from a stainless steel strip having a thickness of about 0.5 mm, the inner edge 10a is brought into contact with or close to the inner peripheral wall surface 2a of the mold 2, and the lower edge (blade edge) 10b is annular. The cavity K extends outward along the annular bottom surface 2c. The inner blade 10 may be formed by bending one or a plurality of points in the middle of the longitudinal direction, or may be formed linearly (not shown) without being bent. The inner blade 10 has an angle θ1a, θ1b intersecting in the longitudinal direction of the blade with respect to the radial direction R extending from the longitudinal center line C, and either one of the forward and reverse rotation directions of the holder 3 (in this example, the clockwise rotation direction). When revolving by rotation in the direction of arrow F, the powder e in the annular cavity K is moved outward while moving in the revolving direction (see FIG. 5A), and the other direction of the holder 3 (see FIG. 5A). In this example, when revolving by rotation in the counterclockwise direction (arrow G direction), the powder e in the annular cavity K is moved inward while moving in the revolving direction (see FIG. 5B). It is set to.

  As shown in FIG. 2, the intermediate scraping tool 5 has an intermediate blade 11 held by a holding tool 3 via an adjusting tool 13 in the same manner as the inner scraping tool 4. The intermediate blade 11 revolves and rises in the intermediate annular region Kb of the annular cavity k by rotation and elevation. Similar to the inner blade 10, the intermediate blade 11 is formed from stainless steel strip having a thickness of about 0.5 mm, and the lower end edge (blade edge) 11b extends along the annular bottom surface 2c of the annular cavity K. Yes. The intermediate blade 11 may be formed linearly without being bent in the middle in the longitudinal direction, or may be formed by bending one or more places in the middle in the longitudinal direction (not shown). When the intermediate blade 11 revolves at an angle θ2 intersecting the radial direction R extending from the longitudinal center line C in the longitudinal direction of the blade 3 in one direction of the holder 3 (the direction of arrow F in this example). The powder e in the annular cavity K is moved outward while moving in the revolving direction (see FIG. 5A), and revolved by rotating the holder 3 in the other direction (in this example, the arrow G direction). In this case, it is set so that the powder e in the annular cavity is moved inward while being moved in the revolution direction (see FIG. 5B).

  As shown in FIG. 2, the outer scavenging tool 6 has an outer blade 12 held by a holding tool 3 via an adjusting tool 13 in the same manner as the inner scavenging tool 4. By rotating and rising, the outer blade 12 revolves and rises in the outer annular region Kc of the annular cavity k. The outer blade 12 is formed from a stainless steel strip having a thickness of about 0.5 mm, the outer edge 12f is brought into contact with or close to the outer peripheral wall surface 2b of the mold 2, and the lower edge (blade edge) 12b is formed into an annular cavity. It extends inward along the annular bottom surface 2c of K. The outer blade 12 may be formed by bending one or more places in the longitudinal direction, or may be formed in a straight line without being bent (not shown). The outer blade 12 revolves at an angle θ3a, θ3b intersecting with the radial direction R extending from the longitudinal center line C in one direction of the holder 3 (the arrow F direction in this example). When moving, the powder e in the annular cavity K is moved outward while moving in the revolving direction (see FIG. 5A), and the holder 3 is rotated in the other direction (in this example, the arrow G direction). Is set so as to move the powder e in the annular cavity in the revolving direction while moving in the revolving direction (see FIG. 5B).

  As shown in FIG. 2B, the inner blade 10, the intermediate blade 11, and the outer blade 12 have a plurality of inner diameters of about 5 to 8 mm at a position about 10 mm above the lower edge (blade edge) 10b (11b, 12b). The through holes 10e (11e, 12e) are drilled as necessary, and the powder rising along the blade surface facing the revolving direction during revolving is relieved in the revolving direction through the relieving holes 10e (11e, 12e). It may be allowed to escape in the opposite direction. The inner blade 10 may form a gradient of about 5/100 to 10/100 that rises outward on the lower edge (blade edge) 10b. The outer blade 12 may form a gradient of about 5/100 to 10/100 that rises inward at the lower end edge (cutting edge) 12b.

  As shown in FIG. 3, the adjusting tool 13 includes a support member 15 that is rotatably fitted in the recess 3 a of the holding tool 3 and fixed with bolts 14, and each blade 10 (11, 12). A pressing member 16 and a clamping bolt 17 are provided. Each blade 10 (11, 12) changes the angle θ1a, θ1b (θ2, θ3a, θ3b) (see FIG. 2A) according to the characteristics such as fluidity of the powder, In order to be able to adjust the angle at which the body is pushed forward to an optimum state, the mounting holes 10d (11d, 12d) through which the clamping bolts 17 are inserted are formed as long holes along the blade longitudinal direction. When adjusting the angle of the adjusting tool 13 with respect to the tool 3, the clamping position with respect to the adjusting tool 13 can be moved and adjusted in the blade longitudinal direction.

  As shown in FIG. 2 (A), the inner scraping tool 4, the intermediate scraping tool 5 and the outer scraping tool 6 are composed of a revolving locus M of the outer edge 10f of the inner blade 10 and an inner edge 12a of the outer blade 12. The revolution trajectory N of the intermediate blade 11 enters the revolution trajectory Kb of the intermediate blade 11. As a result, when the holder 3 rotates in one direction (the arrow F direction in this example), the powder e in the annular region Ka closer to the inner side of the annular cavity K is removed from the inner blade as shown in FIG. 10 is scraped in the revolving direction and the outer direction, and is taken out from the inner blade 10 and passed to the intermediate annular region Kb which is the revolving locus of the intermediate blade 11, and the powder e in the intermediate annular region Kb of the annular cavity K is intermediated. The blade 11 rakes in the revolving direction and the outward direction, exits from the intermediate blade 11 and passes to the outer region kc which is the revolving locus of the outer blade 12, and further, the powder e in the outer annular region Kc of the annular cavity K is transferred to the outer side. Since the blade 12 rakes in the revolving direction and the outer direction, the powder e can be moved in the outward direction from the inner side to the outer side of the annular cavity K. When the holder 3 rotates in the other direction (in this example, the arrow G direction), the powder e in the outer annular region Kc of the annular cavity K is revolved by the outer blade 12 as shown in FIG. The intermediate blade 11 scrapes in the direction and the inner direction, exits from the outer blade 12, passes to the intermediate annular region Kb that is the revolution trajectory of the intermediate blade 11, and the intermediate blade 11 transfers the powder e in the intermediate annular region Kb of the annular cavity K. Scrambling in the revolving direction and inward direction, exiting from the intermediate blade 11 and passing to the inner side area ka which is the revolving trajectory of the inner blade 10, and further, the powder e in the inner side annular area Ka of the annular cavity K is put inside the powder. Since the blade 10 rakes in the revolution direction and the inside direction, the powder e can be moved in the inward direction from the outside to the inside of the annular cavity K. K powder e is alternately moved in one direction and the other direction which are the revolution directions of the blades 10, 11, and 12, and is alternately moved in the outward direction and the inward direction. Can be distributed over the entire area.

  In the present embodiment, each of the inner scraping tool 4, the intermediate scraping tool 5, and the outer scraping tool 6 is provided, but the present invention is not limited to this, and the radius of the annular cavity K is not limited thereto. Depending on the size of the direction, one or all of the scrapers 4, 5 and 6 may be dispersed in the circumferential direction of the annular cavity K to provide a plurality of sets. Further, when the annular cavity K is large in the radial direction, a plurality of intermediate scraping tools 5 may be provided in the radial direction.

  The method of forming the powder charged into the annular cavity into the powder layer using the forming apparatus 1 of the present invention is performed according to the following procedure.

First step:
First, as shown in FIG. 4, a prepared predetermined amount of powder e is put into the annular cavity K of the mold 2.

Second step:
Next, as shown in FIG. 2, the inner blades of the inner scraper 5, the intermediate scraper 5 and the outer scraper 6 held by the retainer 3 are lowered by lowering the retainer 3 to the lowered position D. 10. Lower the intermediate blade 11 and the outer blade 12 into the annular cavity K, and set the blade lower end edges 10b, 11b, 12b to the initial lower positions where they approach the annular bottom surface 2c of the annular cavity K.

Third step:
Subsequently, as shown in FIG. 5, the holder 3 is raised intermittently or continuously and rotated forward and backward at an appropriate rotational speed to rotate in one direction (in this example, arrow F direction) and the other direction ( In this example, the rotation in the direction indicated by the arrow G) is alternately repeated at appropriate intervals, so that the powder e in the inner annular region Ka of the annular cavity K, the powder e in the intermediate annular region Kb, and the outer annular Revolution in one direction of each blade 10, 11, 12 with the blades 10, 11, 12 of the corresponding inner scraping tool 5, intermediate scraping tool 6, and outer scraping tool 7 for the powder e in the region Kc. While moving in the direction, while moving outwardly from the inside of the annular cavity K (see FIG. 1A), and in the revolving direction that is the other direction of the blades 10, 11, 12 Transition from the outside to the inside of the annular cavity K State was inward raking be performed alternately and (FIG. (B) refer).

  The rotating / lifting device 9 raises the holder 3 by the lifting pitch dimension P (for example, selected in the range of P = 0.5 to 1.0 mm) when the holder 3 is intermittently raised. After that, the ascending / stopping operation is repeatedly repeated, and the holder 3 is rotated forward and backward during the stopping. Further, when the holder 3 is continuously raised and rotated in the forward and reverse directions, the lifting dimension per rotation of the holder 3 is selected within a range of 1/10 to 1/100 mm to adjust the rising speed. . The holder 3 is selected in the range of 60 to 100 rpm, and the switching interval between the forward and reverse rotations is selected in the range of 15 to 20 seconds. The blades 10, 11, and 12 of the scraping tools 5, 6, and 7 each repeat the outer movement state and the inner movement state with respect to the movement of the powder e in the annular cavity K that comes into contact with the annular cavity K. Can be dispersed over the entire horizontal direction, and can be dispersed over the entire molding region in the longitudinal direction of the annular cavity K by rising intermittently or continuously, so that a thin powder layer E with a uniform packing density of the powder e can be obtained. Can be obtained.

Fourth Step Finally, when the blade lower edge 10b, 11b, 12b of each blade 10, 11, 12 of each scraping tool 5, 6, 7 is separated from the surface of the powder layer E, each blade 10, 11, 12, the powder E scraping is lost, and a powder layer E having a target thickness dimension T is obtained in the annular cavity K as shown in FIG. In addition, the powder layer E is pressure-molded in the next pressure-molding step to become a molded product (not shown).

(Second Embodiment)
FIGS. 7 and 8 show a second embodiment of the molding apparatus of the present invention, and FIG. 7 shows the inner scraping tool 4 and the outer scraping tool 6 lowered into the annular cavity. FIG. 2A is a plan view in which a part of the holder 3 is broken, and FIG. 2B is a front view in which a part of the mold 2 is sectioned. FIG. 8 shows a state in which the powder e in the annular cavity K is scraped by the inner and outer scraping tools 4 and 6, and FIG. FIG. 5B is a plan view showing an in-feed state in which the powder e is moved from the inside to the outside direction, and FIG. is there.

  The molding apparatus 21 of the present invention according to the present embodiment is greatly different from the first embodiment in that the intermediate scraper is omitted and the inner scraper 4 and the outer scraper 6 are provided for the scraper. In contrast, the other parts are substantially the same as those of the first embodiment, and in FIGS. 7 and 8, the same reference numerals as those in FIGS. 1 to 6 denote corresponding parts.

  As shown in FIG. 7, the molding device 21 of the present invention is surrounded by a circular inner peripheral wall surface 2a and outer peripheral wall surface 2b having a longitudinal center line C concentric with an annular bottom surface 2c perpendicular to the longitudinal center line C, and has an upper surface opened. The mold 2 having the annular cavity K, and the holding that is disposed above the annular cavity K, rotates forward and backward with the longitudinal center line C as the center of rotation, and rises intermittently or continuously from the lowered state to the lowered position D. A tool 3, an inner scraping tool 4 having an inner blade 10 that revolves and rises while holding the holder 3 and revolving an inner annular region Ka of the annular cavity K, and an outer ring of the annular cavity K held by the holder 3. And an outer scavenger 6 having an outer blade 12 that revolves around the region Kc.

  In the molding apparatus 21 of the present invention, as shown in FIG. 7, the inner blade 10 causes the inner edge 10 a to abut or approach the inner peripheral wall surface 2 a of the mold 2, and the lower edge 10 b is an annular bottom surface Kd of the annular cavity K. The outer blade 12 extends outward along the (annular bottom surface 2c of the mold 2), the outer blade 12 makes the outer edge 12f contact or approach the outer peripheral wall surface 2b of the mold 2, and the lower edge 12b is the annular bottom surface of the annular cavity K. Extending inward along Kd (annular bottom surface 2c), the revolution trajectory M of the outer edge 10f of the inner blade 10 enters the revolution trajectory of the outer blade 12 (annular region Kc of the annular cavity K), and the longitudinal center Angles θ1a and θ1b (θ3a and θ3b) at which the blade longitudinal directions of the inner blade 10 and the outer blade 12 intersect with the radial direction extending from the line C are rotated forward and backward. When revolving by rotation in any one direction (in this example, arrow F direction), the powder e in the annular cavity K is moved outward while moving in the revolving direction (see FIG. 8A). When the holder 3 revolves by rotating in the other direction (in this example, the arrow G direction), the powder e in the annular cavity K is moved inward while moving in the revolving direction (FIG. 8B ))).

  The molding apparatus 21 of the present invention first holds a predetermined amount of the prepared powder e into the annular cavity K of the molding die 2 and then lowers the holder 3 to the lowered position to hold it in the holder 3. The inner scraping tool 4 and the outer scraping tool 6 are lowered into the annular cavity K, and the blade lower end edges 10b and 12b of the respective gathering tools 4 and 6 are annular bottom surface Kd (annular bottom surface 2c) of the annular cavity K. Then, the holder 3 that is intermittently or continuously raised is rotated in one direction (in this example, the direction of the arrow F) and the other in the forward and reverse directions at an appropriate rotational speed. The rotation in the direction (in this example, the arrow G direction) is alternately repeated at appropriate intervals, so that the inner scraper 4 and the outer scraper corresponding to the inner powder and the outer powder in the annular cavity K can be obtained. The blades 10 and 12 of the gathering tool 6 An outward scraping state (see FIG. 8 (A)) of moving from the inner side to the outer side in the annular cavity K while moving in a revolving direction that is one direction of 12 (arrow F direction in this example), An inward scraping state in which the blades 10 and 12 are moved in the revolving direction that is the other direction (in this example, the arrow G direction) and moved from the outside to the inside in the annular cavity K (see FIG. 8B). And, finally, when the blade lower edge 110b, 12b of each scraping tool 4, 6 is separated from the surface of the powder layer (not shown), the powder of the target thickness dimension in the annular cavity K A layer can be obtained.

  The molding apparatus 21 according to the present invention is configured to move the powder e in the annular cavity K in contact with the inner blade 10 and the outer blade 12 during the revolution of the inner scraper 4 and the outer scraper 6 with respect to the outer margin state and the inner margin. By repeating the state alternately, it is possible to disperse the entire horizontal direction in the annular cavity K, while the scraping tools 4 and 6 are raised intermittently or continuously to increase the length of the vertical molding region in the annular cavity K. Since it can disperse | distribute over the whole region, it will be suitable for obtaining the thin powder layer (illustration omitted) which made the packing density of the powder e uniform.

( Reference form 1 )
9 and 10 show the molding apparatus of Reference Embodiment 1 , FIG. 9 shows the entire molding apparatus 31 of Reference Embodiment 1 , and FIG. 9 (A) is a plan view and FIG. 9 (B) is a front view. FIG. FIG. 10 shows a state in which the powder e in the annular cavity K is scraped by the scraping tool 34 that revolves. FIG. 10 (A) is a diagram in which the powder e is rotated from the inside to the outside by revolving in the forward rotation direction F. FIG. 5B is a plan view showing an inward movement state in which the powder e is moved from the outside to the inward direction by revolving in the reverse rotation direction G. FIG.

The molding apparatus 31 of the reference form 1 is greatly different from the first embodiment in that it includes one scraping tool 34, and other parts are substantially the same as the first embodiment. 8, the same reference numerals as those in FIGS. 1 to 6 denote corresponding parts.

As shown in FIG. 9, the molding apparatus 31 of the reference form 1 is surrounded by a circular inner peripheral wall surface 2 a and an outer peripheral wall surface 2 b that are concentric with the vertical center line C, and an annular bottom surface 2 c that is orthogonal to the vertical center line C. Mold 2 having an annular cavity K that is open, and disposed above the annular cavity K. The mold 2 rotates forward and backward with the longitudinal center line C as the center of rotation, and rises intermittently or continuously from the lowered state to the lowered position D. A holding tool 3 and a scraping tool 34 having a blade 40 that is held by the holding tool 3 via the adjusting tool 13 and revolves in the annular cavity K.

Forming form apparatus 31 And, as shown in Figure 9 the blade 40, the outer peripheral wall surface 2b of the mold 2 the outer edge 40f causes the inner edge 40a abutting or close to the inner peripheral wall surface 2a of the mold 2 The lower end edge 40b extends along the annular bottom surface Kd (the annular bottom surface 2c of the mold 2) of the annular cavity K by contacting or approaching the blade, and the angle between the radial direction extending from the longitudinal center line C and the blade longitudinal direction intersects. When θa, θb, and θc are revolved by rotation in one of the forward and reverse directions of the holder 3 (in this example, arrow F direction), the powder e in the annular cavity K is moved in the revolving direction. And move it outward (see FIG. 10A), and revolve the powder e in the annular cavity K when it revolves in the other direction of the holder 3 (in this example, the arrow G direction). Move inward while moving in the direction (see Fig. 10B). ) Is set to.

  The blade 40 is obtained by overlapping two blades, and the overlapping portion is sandwiched between the support member 15 (see FIG. 3) and the pressing member 16 (see FIG. 3) of the adjusting tool 13 and held by the holding tool 3. Is retained. The blade 40 changes the angles θa, θb, θc according to characteristics such as the fluidity of the powder so that the angle for pushing the powder during revolution can be adjusted to an optimum state. The mounting hole 40d through which the clamping bolt 17 (see FIG. 3) is inserted is a long hole along the blade longitudinal direction so that the angle of the adjusting tool 13 with respect to the holding tool 3 is adjusted when the adjusting tool 13 is overlapped. The position can be moved and adjusted in the blade longitudinal direction. When the angles θa, θb, and θc are not changed, the blade 40 may be formed as a single piece. The blade 40 may be bent toward the inner side and / or the outer side, may be linear along the longitudinal direction without being bent, or may be curved (not shown) along the longitudinal direction.

The molding apparatus 31 of the reference form 1 first puts the prepared predetermined amount of powder e into the annular cavity K of the molding die 2 and then lowers the holder 3 to the lowered position, thereby holding the holder 3. The scraping tool 34 held by the blade is lowered into the annular cavity K and the blade lower end edge 40b is set in a state of approaching the annular bottom surface Kd (annular bottom surface 2c) of the annular cavity K, and then intermittently. Alternatively, by continuously repeating the forward rotation (in this example, the arrow F direction) and the reverse rotation (in this example, the arrow G direction) alternately at appropriate time intervals, the holder 3 that continuously rises is cyclically looped. The external movement state in which the powder e in the cavity K is moved from the inner side to the outer side in the annular cavity K while moving in the revolving direction in which the blade 40 rotates forward by the blade 40 of the scraping tool 34, and the reverse rotation of the blade Move in the direction of revolution When the blade lower end edge 40b of the scraping tool 34 is separated from the surface of the powder layer (not shown), an annular shape is alternately performed. A powder layer (not shown) having a target thickness dimension can be obtained in the cavity K.

The molding apparatus 31 of the reference form 1 has an annular shape by alternately repeating an outer approach state and an inner approach state with respect to the movement of the powder e in the annular cavity K that contacts the inner blade 40 during the revolution of the scraping tool 34. The dispersion density can be distributed over the entire horizontal direction in the cavity K, and can also be distributed over the entire forming region in the longitudinal direction in the annular cavity K by raising the scraping tool 34 intermittently or continuously. It is suitable for obtaining a thin powder layer (not shown) having a uniform thickness.

( Third embodiment)
11 to 15 show a third embodiment of the molding apparatus of the present invention. FIG. 11 shows the entire molding apparatus 51 of the present invention. FIG. 11 (A) is a plan view. ) Is a front view. FIG. 12 shows the inner scraping tool 4, the intermediate scraping tool 5 and the outer scraping tool 6 lowered to the circular cavity K. FIG. 12 (A) is a plan view in which a part of the holding tool 3 is broken. FIG. (B) is a front view of the mold 52 in cross section. FIG. 13 shows a state in which a predetermined amount of the prepared powder e is put into the circular cavity K. FIG. 13 (A) is a plan view and FIG. 13 (B) is a sectional front view. FIG. 14 shows a state in which the powder e in the circular cavity K is scraped by the inner, intermediate and outer scraping tools 4, 5 and 6, and FIG. FIG. 5B is a plan view showing an externally moving state in which the powder e is revolved from the inside to the outside direction, and FIG. (B) is an inward state in which the powder is revolved in the reverse rotation direction G to move the powder from the outside to the inside direction. FIG. 15A and 15B show a state where the powder layer E is formed in the circular cavity K of the mold, wherein FIG. 15A is a plan view and FIG. 15B is a front view of the mold 52 in cross section.

  The molding apparatus 51 of the present invention is greatly different from the molding apparatus 1 of the first embodiment (FIGS. 1 to 6) in that the cavity K of the molding die 52 is circular and the inner scraping tool 4 is used. The inner blade 10 is extended to the longitudinal center line C of the molding die 52 and the longitudinal center line C of the molding die 52 is passed through the inner edge 10a or in the vicinity thereof, which is common to the molding apparatus 1 of the present invention. The points are the holding tool 3, the intermediate scraping tool 5, the outer scraping tool 6, and the rotation / lifting device 9.

  As shown in FIGS. 11 and 12, the molding device 51 of the present invention is disposed above the molding die 52 and has a circular cavity K that is open on the upper surface, and rotates forward and backward and descends to a lowered position D. The holding tool 3 that rises from the position and stops at the raised position U (see FIG. 11B), and the inner scraping tool 4, the intermediate scraping tool 5, and the outer scraping tool 6 held by the holding tool 3 are provided. The powder e (for example, powder of sintering alloy) (see FIG. 14) charged in the circular cavity K of the mold 52 is revolved by the forward and reverse rotation of the holder 3 and the circular cavity K is raised. A circular powder layer E (see FIG. 15) that is scraped by the inner blade 10, the intermediate blade 11, and the outer blade 12 of the scraping tools 4, 5, and 6 and dispersed in the circular cavity K to make the packing density and the packing thickness uniform. ).

  As shown in FIG. 14, the mold 2 is fixedly installed at a predetermined position of the base 7, and is surrounded by a circular outer peripheral wall surface 52 b having a concentric vertical center line C and a circular bottom surface 52 c orthogonal to the vertical center line C. Thus, a concave circular cavity K having a planar circular shape with an open top is formed. The molding die 52 is integrally formed with a frame body that forms the outer peripheral wall surface 52b and a lower die that forms the circular bottom surface 52c. It is formed as a separate body so as to be relatively movable in the vertical direction. The powder e put in the circular cavity K is formed into a powder layer E as described later, and then the powder layer E is pressure-molded. The molded product (not shown) obtained in this way may be exposed to the outside from the circular cavity K while being placed on the circular bottom surface 52c to facilitate demolding. In the circular cavity K, as shown in FIG. 12A, the inner circular region Ka through which the revolving inner blade 10 passes, the intermediate annular region Kb through which the revolving intermediate blade 11 passes, and the outer outer blade 12 to revolve pass. The outer-side annular region Kc is divided into the outer-side annular region Ka and the inner-side circular region Ka and the inner-side peripheral region of the outer-side annular region Kc enter the intermediate-side annular region Kb.

  11 and 12, the holder 3 is attached to an output portion 9 a of a rotating / lifting device 9 that is attached to a column 8 standing upright from a base 7 so as to be horizontally swingable, and is located above a circular cavity K. Is arranged. The holder 3 rotates forward and backward about the vertical center line C as a rotation center and moves up and down from the lowered position U to the raised position D by the rotation operation and the elevation operation of the output unit 9a of the rotation / lifting device 9. It is like that. In the holder 3, the blades 10, 11 and 12 of the held inner, intermediate and outer scraping tools 4, 5 and 6 revolve in the forward and reverse rotation directions in the circular cavity K to form the powder layer E. Sometimes, the blades 10, 11 and 12 for forming the powder layer E are raised intermittently or continuously from the lowered position in the vertical forming region. The holder 3 is configured to improve the operating efficiency of the molding apparatus 51 of the present invention so that the lifting / lowering in the region other than the vertical molding region is faster than the lifting / lowering speed in the molding region.

  The inner, intermediate, and outer scraping tools 4, 5 and 6 held by the holding tool 3 are moved to the lowering position D when the holding tool 3 is lowered to the lower end edges (blade edges) of the blades 10, 11 and 12, respectively. 10b, 11b, and 12b are stopped at an initial lower position separated from the circular bottom surface 52c of the circular cavity K by an initial height dimension (equivalent to a lifting pitch dimension P to be described later), and then intermittently or continuously of the holder 3 By raising, the blades 10, 11 and 12 are raised in the vertical forming region, and the lower end edges (blade edges) 10b, 11b and 12b are intermittently or continuously separated from the circular bottom surface 52c of the circular cavity K. It is like that.

  When the rotating / elevating device 9 is in an embodiment in which the holder 3 is raised intermittently, the target thickness (powder filling thickness) dimension T (for example, T = 3. 0 to 5.0 mm) is lifted by a lifting pitch dimension P (for example, P = 0.5 to 1.0 mm) smaller than the lifting tool 3, and then the holding tool 3 is repeatedly raised and stopped repeatedly. Is rotated forward and backward. Further, when the holder 3 is continuously raised and rotated forward and backward, the lifting speed per rotation of the holder 3 can be selected within a range of 1/10 to 1/100 mm, and the rising speed is set. It can be adjusted. The rotating / lifting device 9 can adjust the lifting pitch dimension P of the holder 3 or the ascending speed of the holder 3 in accordance with the type of powder e and the filling thickness T. Furthermore, the rotation / lifting device 9 can adjust the rotation speed of the holder 3 within a range of 60 to 100 rpm, and can select a switching interval between forward and reverse rotations within a range of 15 to 20 seconds.

  As shown in FIG. 12, the inner scraping tool 4 has an inner blade 10 held by a holding tool 3 via an adjusting tool 13, and the inner blade 10 is circular due to forward and reverse rotation and raising of the holding tool 3. Revolution and ascending are performed in a circular area Ka close to the inside of the cavity K. The inner blade 10 is formed from a stainless steel strip having a plate thickness of about 0.5 mm, and the short inner side extends in the radial direction R through the longitudinal center line C of the forming die 52 at or near the inner edge 10a. An edge piece 10g and an elongated main body piece 10c extending outward from the inner edge piece 10g are provided, and the inner edge piece 10g and the main body piece 10c have a lower end edge (blade edge) 10b as a circular bottom Kd ( The mold 52 extends outward along the circular bottom surface 52c). The inner blade 10 may be formed by bending one place or a plurality of places (two places in this example) of the main body piece 10d, or may be formed in a straight line without being bent (not shown). The main body piece 10d of the inner blade 10 has an angle θ1a, θ1b, θ1c intersecting the radial direction R extending from the longitudinal center line C and the longitudinal direction of the blade in one of the forward and reverse directions of the holder 3 (this example) Then, when revolving by rotation in the direction of arrow F), the powder e in the circular cavity K is moved outward while moving in the revolving direction (see FIG. 14A), and the other direction ( In this example, when revolving by rotation in the direction of arrow G), the powder e in the circular cavity K is set to move inward while moving in the revolving direction (see FIG. 14B).

  As shown in FIG. 12, the intermediate scraping tool 5 has an intermediate blade 11 held by the holding tool 3 via an adjusting tool 13, as in the case of the inner scraping tool 4. By rotating and rising, the intermediate blade 11 revolves and rises in the intermediate annular region Kb of the circular cavity k. Similar to the inner blade 10, the intermediate blade 11 is formed from stainless steel strip having a thickness of about 0.5 mm, and the lower end edge (blade edge) 11b extends along the circular bottom surface 52c of the circular cavity K. Yes. The intermediate blade 11 may be formed linearly without being bent in the middle in the longitudinal direction, or may be formed by bending one or more places in the middle in the longitudinal direction (not shown). When the intermediate blade 11 revolves at an angle θ2 intersecting the radial direction R extending from the longitudinal center line C in the longitudinal direction of the blade 3 in one direction of the holder 3 (the direction of arrow F in this example). The powder e in the circular cavity K is moved outward while moving in the revolving direction (see FIG. 14A), and revolved by rotating the holder 3 in the other direction (in this example, the arrow G direction). At this time, the powder e in the circular cavity is set to move inward while moving in the revolving direction (see FIG. 14B).

  As shown in FIG. 12, the outer scavenging tool 6 has an outer blade 12 held by a holding tool 3 via an adjusting tool 13 in the same manner as the inner scavenging tool 4. By rotating and rising, the outer blade 12 revolves and rises in the outer annular region Kc of the circular cavity k. The outer blade 12 is formed from a stainless steel strip having a thickness of about 0.5 mm, the outer edge 12f is brought into contact with or close to the outer peripheral wall surface 52b of the mold 52, and the lower edge (blade edge) 12b is formed into a circular cavity. It extends inward along the circular bottom surface 52c of K. The outer blade 12 may be formed by bending one or more places in the longitudinal direction, or may be formed in a straight line without being bent (not shown). The outer blade 12 revolves at an angle θ3a, θ3b intersecting with the radial direction R extending from the longitudinal center line C in one direction of the holder 3 (the arrow F direction in this example). When moving, the powder e in the circular cavity K is moved outward while moving in the revolving direction (see FIG. 14A), and the holder 3 is rotated in the other direction (in this example, the arrow G direction). Is set so that the powder e in the circular cavity is moved inward while being revolved (see FIG. 14B).

  As shown in FIG. 12 (B), the inner blade 10, the intermediate blade 11, and the outer blade 12 have a plurality of inner diameters of about 5 to 8 mm at a position about 10 mm above the lower edge (blade edge) 10b (11b, 12b). The through holes 10e (11e, 12e) are drilled as necessary, and the powder rising along the blade surface facing the revolving direction during revolving is relieved in the revolving direction through the relieving holes 10e (11e, 12e). It may be allowed to escape in the opposite direction. The inner blade 10 may form a gradient of about 5/100 to 10/100 that rises outward on the lower edge (blade edge) 10b. The outer blade 12 may form a gradient of about 5/100 to 10/100 that rises inward at the lower end edge (cutting edge) 12b.

  As shown in FIG. 3, the adjusting tool 13 includes a support member 15 that is rotatably fitted in the recess 3 a of the holding tool 3 and fixed with bolts 14, and each blade 10 (11, 12). A pressing member 16 and a clamping bolt 17 are provided. Each blade 10 (11, 12) is rotating by changing the angles θ1a, θ1b, θ1c (θ2, θ3a, θ3b) (see FIG. 12A) according to characteristics such as fluidity of the powder. In order to be able to adjust the angle at which the powder is pushed forward to the optimum state, the mounting holes 10d (11d, 12d) through which the clamping bolts 17 are inserted are elongated holes along the blade longitudinal direction. When adjusting the angle of the adjusting tool 13 with respect to the holding tool 3, the clamping position with respect to the adjusting tool 13 can be moved and adjusted in the blade longitudinal direction.

  As shown in FIG. 12A, the inner scraping tool 4, the intermediate scraping tool 5 and the outer scraping tool 6 are composed of a revolving locus M of the outer edge 10f of the inner blade 10 and an inner edge 12a of the outer blade 12. The revolution trajectory N of the intermediate blade 11 enters the revolution trajectory Kb of the intermediate blade 11. As a result, when the holder 3 rotates in one direction (the arrow F direction in this example), the powder e in the circular region Ka closer to the inner side of the circular cavity K is removed from the inner blade as shown in FIG. 10 is scraped in the revolving direction and the outward direction, is taken out from the inner blade 10 and is passed to the intermediate annular region Kb which is the revolution trajectory of the intermediate blade 11, and the powder e in the intermediate annular region Kb of the circular cavity K is intermediated. The blade 11 is raked in the revolving direction and the outward direction, is taken out from the intermediate blade 11 and passed to the outer side region kc which is the revolving locus of the outer blade 12, and the powder e in the outer side annular region Kc of the circular cavity K is further transferred to the outer side. Since the blade 12 rakes in the revolution direction and the outer direction, the powder e can be moved in the outward direction from the inner side to the outer side of the circular cavity K. When the holder 3 rotates in the other direction (in this example, the arrow G direction), the powder e in the outer annular region Kc of the circular cavity K is removed by the outer blade 12 as shown in FIG. The intermediate blade 11 is scraped in the revolving direction and the inward direction, exits from the outer blade 12 and passes to the intermediate annular region Kb, which is the revolving trajectory of the intermediate blade 11, and the powder e in the intermediate annular region Kb of the circular cavity K is transferred to the intermediate blade 11. In the revolving direction and the inner direction, the intermediate blade 11 takes out and passes to the inner side region ka which is the revolving locus of the inner blade 10, and further the powder e in the inner side circular region Ka of the circular cavity K is powdered. Since the inner blade 10 rakes in the revolving direction and the inner direction, the powder e can be moved inward from the outer side of the circular cavity K to the inner side. The powder e of the tee K is alternately moved in one direction and the other direction as the revolution directions of the blades 10, 11, and 12 and is alternately moved in the outward direction and the inward direction, so that the powder e is circular cavities. K can be distributed over the entire area of K.

  In the present embodiment, each of the inner scraping tool 4, the intermediate scraping tool 5, and the outer scraping tool 6 is provided, but the present invention is not limited to this, and the radius of the circular cavity K is not limited thereto. Depending on the size of the direction, one or all of the scrapers 4, 5 and 6 may be dispersed in the circumferential direction of the annular cavity K to provide a plurality of sets. Further, when the annular cavity K is large in the radial direction, a plurality of intermediate scraping tools 5 may be provided in the radial direction.

  A method of forming the powder charged into the circular cavity into the powder layer using the forming apparatus 51 of the present invention is performed according to the following procedure.

First step:
First, as shown in FIG. 13, the prepared predetermined amount of powder e is put into the circular cavity K of the mold 52.

Second step:
Next, as shown in FIG. 12, the inner blades of the inner scraper 5, the intermediate scraper 5 and the outer scraper 6 held by the retainer 3 are lowered by lowering the retainer 3 to the lowered position D. 10. Lower the intermediate blade 11 and the outer blade 12 into the circular cavity K, and set the blade lower end edges 10b, 11b, 12b to the initial lower positions where they approach the circular bottom surface 52c of the circular cavity K.

Third step:
Subsequently, as shown in FIG. 14, the holder 3 is raised intermittently or continuously and rotated forward and backward at an appropriate rotational speed to rotate in one direction (in this example, arrow F direction) and the other direction ( In this example, rotation in the direction of the arrow G) is alternately repeated at appropriate intervals, so that the powder e in the inner circular region Ka of the circular cavity K, the powder e in the intermediate annular region Kb, and the outer annular Revolution in one direction of each blade 10, 11, 12 with the blades 10, 11, 12 of the corresponding inner scraping tool 5, intermediate scraping tool 6, and outer scraping tool 7 for the powder e in the region Kc. While moving in the direction, moving outwardly from the inside of the circular cavity K toward the outside (see FIG. 1A), and moving in the revolving direction that is the other direction of the blades 10, 11, 12. From the outside to the inside of the circular cavity K State was raking inward to dynamic performed alternately (FIG. (B) refer).

  The rotating / lifting device 9 raises the holder 3 by the lifting pitch dimension P (for example, selected in the range of P = 0.5 to 1.0 mm) when the holder 3 is intermittently raised. After that, the ascending / stopping operation is repeatedly repeated, and the holder 3 is rotated forward and backward during the stopping. Further, when the holder 3 is continuously raised and rotated in the forward and reverse directions, the lifting dimension per rotation of the holder 3 is selected within a range of 1/10 to 1/100 mm to adjust the rising speed. . The holder 3 is selected in the range of 60 to 100 rpm, and the switching interval between the forward and reverse rotations is selected in the range of 15 to 20 seconds. The blades 10, 11, and 12 of the scraping tools 5, 6, and 7 each repeat a circular cavity K by repeatedly repeating an outer approaching state and an inner approaching state with respect to the movement of the powder e in the circular cavity K that comes into contact. Can be dispersed over the entire horizontal direction, and can be dispersed over the entire forming region in the vertical direction of the circular cavity K by rising intermittently or continuously, so that a thin powder layer E with a uniform packing density of the powder e can be obtained. Can be obtained.

Fourth Step Finally, when the blade lower edge 10b, 11b, 12b of each blade 10, 11, 12 of each scraping tool 5, 6, 7 is separated from the surface of the powder layer E, each blade 10, 11, 12, the powder E scraping is lost, and a circular powder layer E having a target thickness dimension T is obtained in the circular cavity K as shown in FIG. In addition, the powder layer E is pressure-molded in the next pressure-molding step to become a molded product (not shown).

( Fourth embodiment)
FIGS. 16 and 17 show a fourth embodiment of the molding apparatus of the present invention. FIG. 16 shows the inner scraping tool 4 and the outer scraping tool 6 lowered into the circular cavity of the molding apparatus 61 of the present invention. FIG. 2A is a plan view in which a part of the holder 3 is broken, and FIG. 2B is a front view in which a molding die 52 is sectioned. FIG. 17 shows a state in which the powder e in the circular cavity K is scraped by the inner and outer scraping tools 4 and 6, and FIG. 17 (A) shows the forward rotation direction (clockwise rotation direction). FIG. 5B is a plan view showing an out-fed state in which the powder e is revolved in the direction F and moved from the inside to the outside direction. FIG. It is a top view which shows the inward alignment state to which it moves to.

The molding device 61 of the present invention according to the present embodiment is the third embodiment (FIG. 6) in that the intermediate scraper is omitted and the inner scraper 4 and the outer scraper 6 are provided. 11 to 15), the other parts are substantially the same as those of the third embodiment. In FIGS. 16 and 17, the same reference numerals as those in FIGS. 11 to 15 denote corresponding parts.

  As shown in FIG. 16, the molding device 61 of the present invention is surrounded by a circular inner peripheral wall surface 2 a and an outer peripheral wall surface 2 b that are concentric with the vertical center line C, and an annular bottom surface 2 c that is orthogonal to the vertical center line C, and has an upper opening. A mold 52 having a circular cavity K, and a holding member that is disposed above the circular cavity K, rotates forward and backward around the vertical center line C, and rises intermittently or continuously from the lowered state to the lowered position D. A tool 3, an inner scraping tool 4 having an inner blade 10 that revolves and rises while being held by the holder 3 and revolves around the inner annular region Ka of the circular cavity K, and an outer ring of the circular cavity K held by the holder 3 And an outer scavenger 6 having an outer blade 12 that revolves around the region Kc.

  In the molding apparatus 61 of the present invention, as shown in FIG. 16, the inner blade 10 passes the longitudinal center line C of the molding die 52 at or near the inner edge 10a of the inner edge piece 10g, and the inner edge piece 10g and the main body. The lower edge 10b of the piece 10c extends outward along the circular bottom surface Kd of the circular cavity K (the circular bottom surface 52c of the mold 52), and the outer blade 12 abuts the outer edge 12f against the outer peripheral wall surface 2b of the mold 52. Alternatively, the lower end edge 12b extends inward along the circular bottom surface Kd of the circular cavity K (the circular bottom surface 52c of the mold 52), and the revolution trajectory M of the outer edge 10f of the inner blade 10 is made to approach the outer blade 12. The revolving locus (annular region Kc of the circular cavity K) enters the radial direction extending from the longitudinal center line C and the longitudinal direction of each of the inner blade 10 and the outer blade 12. When the angles θ1a, θ1b, and θ1c (θ3a, θ3b) intersecting with each other are revolved by rotation in either one of the forward and reverse directions of the holder 3 (the arrow F direction in this example), the circular cavity K The inner powder e is moved in the outer direction while moving in the revolving direction (see FIG. 14A), and revolved by rotating in the other direction of the holder 3 (the arrow G direction in this example). The powder e in the circular cavity K is set to move inward while moving in the revolution direction (see FIG. 14B).

  The molding apparatus 61 of the present invention first holds a predetermined amount of the prepared powder e into the circular cavity K of the molding die 52, and then lowers the holder 3 to the lowered position, thereby holding it in the holder 3. The inner scraping tool 4 and the outer scraping tool 6 are lowered into the circular cavity K, and the blade lower end edges 10b and 12b of the respective gathering tools 4 and 6 are moved to the circular bottom Kd of the circular cavity K (of the mold 52). Set in a state of approaching the circular bottom surface 52c), and then continuously or intermittently ascend the holding tool 3 in one direction (in this example, the direction of the arrow F) that rotates forward and reverse at an appropriate rotational speed. By rotating the rotation and rotation in the other direction (arrow G direction in this example) alternately at appropriate intervals, the inner scraper 4 corresponding to the inner powder and the outer powder in the circular cavity K can be obtained. And each blade 10, 12 of the outer scraping tool 6, An outward scraping state in which the blades 10 and 12 are moved in the revolving direction which is one direction (in this example, the arrow F direction) and moved from the inside to the outside in the circular cavity K (see FIG. 17A). And an inward scraping state in which the blades 10 and 12 are moved from the outside to the inside in the circular cavity K while moving in the revolving direction which is the other direction (the arrow G direction in this example) (FIG. 17B ))) Alternately, and finally the target thickness dimension in the circular cavity K when the blade lower edge 110b, 12b of each scraper 4, 6 is separated from the surface of the powder layer (not shown). The powder layer can be obtained.

  The molding device 61 according to the present invention is configured to move the powder e in the circular cavity K in contact with the inner blade 10 and the outer blade 12 during the revolution of the inner scraper 4 and the outer scraper 6 with respect to the outer margin state and the inner margin. By repeating the state alternately, it is possible to disperse the entire horizontal direction in the circular cavity K, while the scraping tools 4 and 6 are raised intermittently or continuously to increase the length of the vertical molding region in the circular cavity K. Since it can disperse | distribute over the whole region, it becomes a thing suitable for obtaining the circular thin powder layer (illustration omitted) which made the packing density of the powder e uniform.

( Reference form 2 )
18 and 19 show the molding device 71 of Reference Embodiment 2, and FIG. 18 shows the scraping tool 34 lowered into the circular cavity of the molding device 71 of Reference Embodiment 2 , and FIG. ) Is a plan view in which a part of the holder 3 is broken, and FIG. FIG. 19 shows a state in which the powder e in the circular cavity K is being scraped by the revolving scraper 34. FIG. 19 (A) shows the powder revolved in the forward rotation direction (clockwise rotation direction) F. FIG. 5B is a plan view showing an outside moving state in which the body e is moved from the inside to the outside direction, and FIG. FIG.

The molding apparatus 71 of the reference embodiment 2, very different from the third embodiment in that with one raking allowed ingredients 34, and other parts the third embodiment (see FIGS. 11 to 15) 18 and 19, the same reference numerals as those in FIGS. 11 to 15 denote corresponding parts.

As shown in FIG. 18, the molding apparatus 71 of the reference form 2 is surrounded by a circular inner peripheral wall surface 2 a and an outer peripheral wall surface 2 b that are concentric with the vertical center line C, and a circular bottom surface 52 c that is orthogonal to the vertical center line C. A mold 52 having an open circular cavity K, and disposed above the circular cavity K, rotate forward and backward around the vertical center line C as a center of rotation, and rise intermittently or continuously from the lowered state to the lowered position D A holding tool 3 and a scraping tool 34 having a blade 40 that is held by the holding tool 3 via the adjusting tool 13 and revolves in the circular cavity K. Is configured to revolve and rise in a circular region Ka of the circular cavity K.

  The blade 40 of the scraper 34 has a short inner edge piece 40g extending in the radial direction R through the longitudinal center line C of the mold 52 at or near the inner edge 40a, and extends outward from the inner edge piece 40g. And a long main body piece 40c that makes the outer edge 40f contact or approach the outer peripheral wall surface 2b of the mold 52, and the inner edge piece 40g and the main body piece 40c form a circular lower end edge (blade edge) 40b. The cavity K extends outward along the circular bottom surface Kd (the circular bottom surface 52c of the mold 52). The blade 40 is formed by bending one or a plurality of locations (two locations in this example) in the middle of the main body piece 40d, and an angle between the radial direction R extending from the longitudinal center line C and the longitudinal direction of the main body piece 40d. When θ3a, θ3b, and θ3c are revolved by rotation in one of the forward and reverse directions of the holder 3 (in this example, arrow F direction), the powder e in the circular cavity K is moved in the revolving direction. While moving in the outward direction (see FIG. 19A), the powder e in the circular cavity K is moved in the revolving direction when the holder 3 revolves in the other direction (in this example, the arrow G direction). It is set to move inward while moving (see FIG. 19B).

  The blade 40 is obtained by overlapping two blades, and the overlapping portion is sandwiched between the support member 15 (see FIG. 3) and the pressing member 16 (see FIG. 3) of the adjusting tool 13 and held by the holding tool 3. Is retained. The blade 40 changes the angles θ3a, θ3b, θ3c according to characteristics such as the fluidity of the powder, so that the angle for pushing the powder during revolution can be adjusted to an optimum state. The mounting hole 40d through which the clamping bolt 17 (see FIG. 3) is inserted is a long hole along the blade longitudinal direction so that the angle of the adjusting tool 13 with respect to the holding tool 3 is adjusted when the adjusting tool 13 is overlapped. The position can be moved and adjusted in the blade longitudinal direction. When the angles θ3a, θ3b, and θ3c are not changed, the blade 40 may be formed as a single piece. The blade 40 may be bent toward the inner side and / or the outer side, or may be linear (not shown) along the longitudinal direction without being bent.

The molding apparatus 71 of the reference form 2 first puts the prepared predetermined amount of powder e into the circular cavity K of the molding die 52, and then lowers the holder 3 to the lowered position, thereby holding the holder 3 The scraper 34 held in the lower part is lowered into the circular cavity K, and the blade lower end edge 40b is set in a state of approaching the circular bottom surface Kd of the circular cavity K (the circular bottom surface 52c of the mold 52), and continues. Then, the holder 3 that rises intermittently or continuously repeats forward rotation (in this example, the arrow F direction) and reverse rotation (in this example, the arrow G direction) alternately at appropriate times at appropriate time intervals. Thus, the powder e in the circular cavity K is moved by the blade 40 of the scraping tool 34 in the revolving direction in which the blade 40 rotates in the forward direction while moving from the inside to the outside in the circular cavity K, and Public rotating blade The inner edge of the circular cavity K is alternately moved from the outside to the inside while being moved in the direction, and finally the blade lower edge 40b of the scraping tool 34 is separated from the surface of the powder layer (not shown). Then, a circular powder layer having a target thickness dimension can be obtained in the circular cavity K.

The molding apparatus 71 of the reference form 2 is circular by repeating the outer approach state and the inner approach state alternately with respect to the movement of the powder e in the circular cavity K that contacts the inner blade 40 during the revolution of the scraping tool 34. The powder e can be dispersed over the entire horizontal direction in the cavity K, and can be dispersed throughout the entire vertical forming region in the circular cavity K by raising the scraping tool 34 intermittently or continuously. It is suitable for obtaining a circular thin powder layer (not shown) having a uniform thickness.

BRIEF DESCRIPTION OF THE DRAWINGS The whole 1st Embodiment of this invention shaping | molding apparatus is shown, Comprising: FIG. (A) is a top view, (B) is a front view. FIG. 2 shows an inner scavenging tool, an intermediate scavenging tool, and an outer scavenging tool that are lowered into the annular cavity in the same embodiment, and FIG. (A) is a plan view in which a part of the holder is broken, FIG. B) is a front view of a part of the mold in cross section. The state which made the holding tool hold | maintain the scraping tool in the same embodiment is expanded, Comprising: FIG. (A) is a front view, FIG. (B) is the side view which carried out the longitudinal cross-section. FIG. 2 shows a state in which a predetermined amount of powder prepared in the embodiment is put into an annular cavity, in which FIG. (A) is a plan view and FIG. (B) is a cross-sectional front view. In the same embodiment, it shows a state where the powder in the annular cavity is being scraped by the inner, intermediate and outer scraping tools, and FIG. FIG. 5B is a plan view showing an inward movement state in which the body is moved from the inner side to the outer side direction, and FIG. In the same embodiment, a state in which the powder layer E is molded in the annular cavity of the molding die is shown, in which FIG. (A) is a plan view and FIG. (B) is a front view of the molding die. FIG. 7 shows an inner scavenging tool, an intermediate scavenging tool, and an outer scavenging tool that are lowered into the annular cavity in the second embodiment of the molding apparatus of the present invention. FIG. The plan view which fractured | ruptured, FIG. (B) is the front view which cross-sectioned a part of shaping | molding die. In the same embodiment, a state in which the powder in the annular cavity is scraped by the inner and outer scraping tools that revolve, and FIG. FIG. 5B is a plan view showing an inward movement state in which the powder is moved from the outer side to the inner side by revolving in the reverse rotation direction. The whole reference form 1 is shown, and FIG. (A) is a plan view and (B) is a front view. FIG. 2A shows a state where the powder in the annular cavity is being scraped by a scraping tool that revolves in Reference Form 1 , and FIG. (A) revolves in the forward rotation direction to move the powder from the inside to the outside. FIG. 5B is a plan view showing an in-coming state in which the powder is moved from the outside to the inside by revolving in the reverse rotation direction. The whole 3rd Embodiment of this invention shaping | molding apparatus is shown, Comprising: A figure (A) is a top view, (B) is a front view. In the same embodiment, an inner scraping tool, an intermediate scraping tool and an outer scraping tool lowered to a circular cavity are shown, and FIG. (A) is a plan view in which a part of the holder is broken, FIG. ) Is a front view of a cross section of the mold. FIG. 2 shows a state where a predetermined amount of powder prepared in the embodiment is put into a circular cavity, in which FIG. (A) is a plan view and FIG. (B) is a cross-sectional front view. In the same embodiment, it shows a state in which the powder in the circular cavity is scraped by the inner, intermediate and outer scraping tools for revolving, and FIG. FIG. 5B is a plan view showing an inward movement state in which the powder is moved from the outer side to the inner side by revolving in the reverse rotation direction. The state which shape | molded the powder layer in the circular cavity of the shaping | molding die in the same embodiment is shown, Comprising: FIG. (A) is a top view, FIG. (B) is the front view which cut the shaping | molding die. 4 shows a fourth embodiment of the molding apparatus of the present invention, showing an inner scraping tool and an outer scraping tool lowered into a circular cavity, and FIG. The top view which fractured | ruptured, FIG. (B) is the front view which carried out the cross section of the shaping | molding die. In the same embodiment, a state where the powder in the circular cavity is scraped by the inner and outer scraping tools that revolve, and FIG. (A) revolves in the forward rotation direction to move the powder to the inner side. FIG. 4B is a plan view showing an inward movement state in which the powder is moved from the outer side to the inner side by revolving in the reverse rotation direction. It shows Reference Form 2 and shows a scraping tool lowered into a circular cavity. FIG. (A) is a plan view with a part of the holder broken, and FIG. (B) is a mold. It is the sectional front view. FIG. 2A shows a state in which powder in a circular cavity is being scraped by a scraping tool that revolves in Reference Form 2 , and FIG. (A) revolves in the forward rotation direction to move powder e from the inside to the outside. FIG. 5B is a plan view showing an in-coming state in which the powder is moved from the outside to the inside by revolving in the reverse rotation direction.

Explanation of symbols

2 (52) ... Mold, 2a ... Inner peripheral wall surface, 2b (52b) ... Outer peripheral wall surface, 2c (52c) ... Annular bottom surface, 3 ... Holding tool, 4 ... Inner scraper, 5 ... Intermediate scraper, 6 DESCRIPTION OF SYMBOLS Outer scraping tool, 9 ... Rotation / lifting device, 0 ... Inner blade, 10a ... Inner edge, 10b ... Lower edge, 10d ... Mounting hole, 10e ... Relief hole, 10f ... Outer edge, 11 ... Intermediate blade, 11b: Lower edge, 11d: Mounting hole, 11e: Relief hole, 12 ... Outer blade, 12a ... Inner edge, 12b ... Lower edge, 12d ... Mounting hole, 12e ... Escape hole, 12f ... Outer edge, 13 ... Adjustment 34, scraping tool, 40 ... inner blade, 40a ... inner edge, 40b ... lower end edge, 40d ... mounting hole, 40e ... escape hole, 40f ... outer edge, 34 ... scraping tool, 40 ... inner blade 40a ... inner edge, 40b ... lower edge, 40f Outer edge,

Claims (6)

  A mold having an annular cavity surrounded by a circular inner peripheral wall and outer peripheral wall having a longitudinal center line and an annular bottom surface orthogonal to the longitudinal center line and having an upper surface opened, and disposed above the annular cavity, Rotating forward and backward with the center line as the center of rotation, and holding tool that rises intermittently or continuously from the lowered state to the lowered position, and revolves and revolves around the inner annular region of the annular cavity held by the holding tool An inner scraper having an inner blade, an intermediate scraper having an intermediate blade that revolves and rises while holding the retainer and revolves around an intermediate annular region of the annular cavity, and an outer scraper that is retained by the retainer and closer to the outer side of the annular cavity An outer scraping tool having an outer blade that revolves and revolves around the annular region, and the inner blade causes the inner edge to abut or approach the inner peripheral wall of the mold. The lower edge extends outward along the annular bottom surface of the annular cavity, the intermediate blade extends the lower edge along the annular bottom surface of the annular cavity, and the outer blade contacts or approaches the outer peripheral wall of the mold. And extending the lower end edge inward along the annular bottom surface of the annular cavity so that the revolution trajectory of the outer edge of the inner blade and the revolution trajectory of the inner edge of the outer blade enter the revolution trajectory of the intermediate blade, An annular cavity when the angle extending from the radial direction extending from the longitudinal center line and the longitudinal direction of each of the inner blade, the intermediate blade, and the outer blade is reciprocated by rotation in either the forward or reverse direction of the holder The powder in the ring cavity is moved in the revolving direction while moving in the revolving direction, and the powder in the annular cavity is moved in the revolving direction when revolving by rotating the holder in the other direction. Powder layer forming apparatus, characterized in that set to move inwardly while.   A mold having an annular cavity surrounded by a circular inner peripheral wall and outer peripheral wall having a longitudinal center line and an annular bottom surface orthogonal to the longitudinal center line and having an upper surface opened, and disposed above the annular cavity, Rotating forward and backward with the center line as the center of rotation, and holding tool that rises intermittently or continuously from the lowered state to the lowered position, and revolves and revolves around the inner annular region of the annular cavity held by the holding tool An inner scraper having an inner blade, and an outer scraper having an outer blade that is held by the holder and revolves around the outer annular region of the annular cavity, the inner blade having an inner edge as an inner periphery of the mold The lower edge extends outward along the annular bottom surface of the annular cavity, and the outer blade makes the outer edge contact or approach the outer peripheral wall of the mold and lower. The edge extends inward along the annular bottom surface of the annular cavity so that the revolution trajectory of the outer edge of the inner blade enters the revolution trajectory of the outer blade, and extends radially from the longitudinal centerline and the inner and outer blades. When the reciprocal angle of each of the blades is rotated by rotation in either the forward or reverse direction of the holder, the powder in the annular cavity is moved outward while moving in the revolving direction. A powder layer forming apparatus, wherein the powder in the annular cavity is set to move inward while revolving in the direction of revolution when the holder revolves in the other direction.   A mold having a circular cavity surrounded by a circular outer peripheral wall surface having a vertical center line and a circular bottom surface orthogonal to the vertical center line and having an open top surface is disposed above the circular cavity, and rotates the vertical center line. A holder that rotates forward and backward around the center and rises intermittently or continuously from a state where it is lowered to the lowered position, and an inner blade that is held by the holder and revolves in the circular area closer to the inside of the circular cavity and rises. An inner scraping tool, an intermediate scraping tool having an intermediate blade that revolves and rises while holding the holding tool and revolves around an annular region of the circular cavity, and an outer moving annular region of the circular cavity held by the holder. An outer scraping tool having an outer blade, wherein the inner blade passes the longitudinal center line of the mold at or near the inner edge and a circular cavity at the lower edge. The outer blade extends along the circular bottom of the circular cavity, the lower edge extends along the circular bottom of the circular cavity, the outer blade causes the outer edge to abut or approach the outer peripheral wall of the mold, and the lower edge is Extending inward along the circular bottom surface of the circular cavity, the revolution trajectory of the outer edge of the inner blade and the revolution trajectory of the inner edge of the outer blade enter the revolution trajectory of the intermediate blade and extend from the longitudinal center line. When the angle between the radial direction and the longitudinal direction of the inner blade, intermediate blade, and outer blade intersects with the rotation of the holder in either the forward or reverse direction, the powder in the circular cavity is changed. Move in the revolving direction while moving in the outer direction, and move in the inner direction while moving the powder in the circular cavity in the revolving direction when revolving in the other direction of the holder Powder layer forming apparatus, characterized in that the set such that.   A mold having a circular cavity surrounded by a circular outer peripheral wall surface having a vertical center line and a circular bottom surface orthogonal to the vertical center line and having an open top surface is disposed above the circular cavity, and rotates the vertical center line. A holder that rotates forward and backward around the center and rises intermittently or continuously from a state where it is lowered to the lowered position, and an inner blade that is held by the holder and revolves in the circular area closer to the inside of the circular cavity and rises. An inner scraper and an outer scraper having an outer blade held by the retainer and revolving around an outer annular region of the circular cavity, the inner blade being at or near the inner edge of the longitudinal center line of the mold And the lower edge extends outward along the circular bottom surface of the circular cavity, and the outer blade causes the outer edge to abut or approach the outer peripheral wall surface of the mold and the lower edge is circular. Extending inward along the circular bottom surface of the cavity, the revolution trajectory of the outer edge of the inner blade enters the revolution trajectory of the outer blade, and the radial and inner blades and the outer blades extend from the longitudinal center line. When the angle intersecting with the longitudinal direction is revolved by rotation in either the forward or reverse direction of the holder, the powder in the circular cavity is moved outward while moving in the revolution direction. A powder layer forming apparatus, wherein the powder is set to move inward while moving the powder in the circular cavity when revolving by rotation in the other direction. The powder filling apparatus according to claim 1 or 3, wherein an intermediate blade of the intermediate scraping tool is held by the holder so as to be able to rotate and move in the blade longitudinal direction. The inner blade of the inner scraping tool is rotatable with respect to the holder and is movable in the blade longitudinal direction, and the outer blade of the outer scraping tool is rotatable with respect to the holder and the blade length The powder filling apparatus according to any one of claims 1 to 4, wherein the powder filling apparatus is held so as to be movable in a direction.

Images