JP7016174B2 - Powder molding equipment, powder molding mold and sintered body manufacturing method - Google Patents

Description

The present invention relates to a technique for producing a powder molded body using a mold and a technique for producing a sintered body by sintering the powder molded body.

In producing a cutting insert by a powder metallurgy method, a method of molding a raw material powder using a die divided into two in the thickness direction or the thickness perpendicular direction of the insert has been proposed (see, for example, Patent Document 1). ).

The mold (mortar) is divided into two split dies (split mortars) along the ridgeline in the thickness direction (vertical direction) or the thickness perpendicular direction (horizontal direction) of the insert. That is, the dividing surface of the dividing die includes an inclined dividing surface that is inclined with respect to the thickness direction of the insert.

This prevents misalignment of the split dies due to the wedge effect caused by the inclined split surfaces forming the split surfaces of each split die being tapered to each other, and facilitates and accurate alignment of the split dies. In addition, the separation of the split mold is suppressed by the molding pressure. Further, as compared with the case where the inclined divided surface constituting the divided surface of the divided dies is replaced with a surface parallel to the insert thickness direction, the contact area between the divided dies is increased, and the divided dies are separated from each other. The pressure per unit area applied to the divided surface at the time of combination is reduced, and the fatigue and wear of each divided die on the divided surface are suppressed.

Japanese Patent No. 5261833

However, when a plurality of split dies are combined to form a cavity, each split die can still be translated after the inclined split surfaces constituting the split surface of each split die come into contact with each other. In this case, at least one of the plurality of split dies may be misaligned in a direction different from the translational direction by being guided by the inclined split surface.

For example, as shown in FIG. 11A, a case where the mold X0 is laterally divided into two divided molds X1 and X2 will be considered.

The demarcation surface X12 of the first division mold X1 is continuous with the first demarcation surface X121 substantially perpendicular to the translation direction and one side edge of the first demarcation surface X121 at one side edge, and is substantially parallel to the translation direction. It is composed of a second demarcation surface X122. The first division surface X11 of the first division mold X1 is composed of an inclined division surface that is continuous with the other side edges of the first demarcation surface X121 and is inclined with respect to the translation direction. The second division surface X13 of the first division mold X1 is composed of an inclined division surface that is continuous with the other side edges of the second demarcation surface X122 and is inclined with respect to the translation direction.

Similarly, the demarcation surface X22 of the second division mold X2 is continuous with the first demarcation surface X221 substantially perpendicular to the translation direction and one side edge of the first demarcation surface X221 at one side edge, and is in the translation direction. It is composed of a second demarcation plane X222 substantially parallel to the surface. The first division surface X21 of the second division mold X2 is composed of an inclined division surface that is continuous with the other side edges of the second demarcation surface X222 and is inclined with respect to the translation direction. The second division surface X23 of the second division mold X2 is composed of an inclined division surface that is continuous with the other side edges of the first demarcation surface X221 and is inclined with respect to the translation direction.

In this case, when the split dies X1 and X2 are laterally driven so as to be close to each other due to a manufacturing error of each split die, the split surfaces X11 and X21 come into contact with each other and are split. After the surfaces X13 and X23 are in contact with each other, the split dies X1 and X2 can be driven in the same direction. Therefore, as shown in FIG. 11B, one split die X1 is the other split die. It translates in a direction perpendicular to the translation direction, albeit slightly, so as to be guided by the inclined dividing surface of X2. For this reason, there is a possibility that the molding accuracy of the insert will be unacceptably reduced.

Therefore, the present invention is a powder molded body and sintering by preventing relative translation between the divided dies in a direction different from the original translation direction, which is derived from the inclined divided surface constituting the divided surface of each divided die. It is an object of the present invention to provide a method and the like capable of improving the molding accuracy of a body.

The present invention comprises a plurality of split dies that form cavities according to the side shape of the powder molded body by abutting against each other, and a mold drive mechanism for relatively translating the plurality of split dies. An upper punch and a lower punch inserted into the cavity formed by the plurality of split dies from the upper direction and the lower direction, respectively, and an elevating drive mechanism for raising and lowering each of the upper punch and the lower punch. Each of the plurality of divided dies is connected to an inclined divided surface inclined with respect to the translational direction and the right edge and the left edge of the inclined divided surface, respectively, in the right direction and the left direction, respectively. The present invention relates to a powder forming apparatus having a divided surface extending in a vertical direction and having a vertical divided surface perpendicular to a translational direction, and a demarcated surface defining the cavity.

In the powder molding apparatus of the present invention, each of the plurality of divided dies abuts on the vertical divided surface of the divided surfaces, while the inclined divided surfaces have mutual contact with each other at intervals included in the range of 1 to 30 μm. It is characterized in that it is configured to form the cavity by abutting each other in a state of being separated from each other.

According to the powder molding apparatus having the above configuration, when the cavity is formed, each of the divided dies is translated and driven, and the vertically divided surfaces constituting the divided surface of each of the divided dies come into contact with each other. On the other hand, the inclined division surfaces constituting the division surface of each division mold are separated from each other with a gap. For this reason, it is possible to reliably avoid a situation in which a plurality of split dies are driven so as to be relatively translated in a direction different from the translation direction while being in contact with each other on the inclined split surface constituting the split surface. To. Further, the gap between the inclined divided surfaces is included in the range of 1 to 30 μm, and the situation where the raw material powder having an average particle size equal to or larger than the gap is suppressed from the cavity into the gap is suppressed. As a result, it is surely prevented that translation (positional deviation) occurs in a direction different from the original translation direction of the plurality of split molds due to the appearance of the situation, and the molding accuracy of the cavity and thus the powder are prevented. The shape accuracy of the molded product can be improved.

For the same reason as in the method for producing a sintered body of the present invention and the mold of the present invention having a plurality of divided dies, the shape accuracy of the powder molded body can be improved.

For the same reason, when the divided surface of each of the plurality of divided molds further has a parallel surface parallel to the translational direction in addition to the inclined divided surface and the vertical divided surface, the above-mentioned Each of the plurality of divided dies abuts on the vertical divided surface of the divided surfaces, while being separated from each other at intervals included in the range of 1 to 30 μm on the parallel surface in addition to the inclined divided surface. It is preferable that the cavity is formed by abutting each other in the state.

Explanatory drawing about the structure of the powder molding apparatus as 1st Embodiment of this invention. Explanatory drawing about the structure of the mold as the 1st Embodiment of this invention. The explanatory view about the function of the mold as the 1st Embodiment of this invention. The explanatory view about the manufacturing method of the powder compact | molded body as the 1st Embodiment of this invention. Explanatory drawing about the structure of the mold as the 2nd Embodiment of this invention. Explanatory drawing about the function of the mold as the 2nd Embodiment of this invention. Explanatory drawing about the function of the mold as the 2nd Embodiment of this invention. Explanatory drawing about the structure of the mold as the 3rd Embodiment of this invention. The explanatory view about the manufacturing method of the powder compact | molded body as the 2nd Embodiment of this invention. Explanatory drawing about the structure of the mold as the 4th Embodiment of this invention. Explanatory drawing about the structure of the mold as the 5th Embodiment of this invention. Explanatory drawing about the structure of the mold as the 6th Embodiment of this invention. Explanatory drawing about the structure of the mold as the 7th Embodiment of this invention. Explanatory drawing about the structure of the mold in the prior art. Explanatory drawing about the function of the mold in the prior art.

(First Embodiment)
(Mold configuration)
The mold 10 as the first embodiment of the present invention shown in FIG. 2 includes a first split mold 11 and a second split mold 12.

The first division mold 11 has a first division surface 111, a demarcation surface 112, and a second division surface 113.

The first division surface 111 is composed of a vertical division surface 1111 and an inclined division surface 1112. The vertical division surface 1111 is continuous with one side surface of the first division mold 11 at the outer edge, and is in the translational direction of the first division mold 11 (before and after the direction approaching the second division mold 12 is the front). It extends vertically in a posture perpendicular to the direction). The inclined division surface 1112 is continuous with the inner edge of the vertical division surface 1111 at the outer edge, and extends in the vertical direction in an inclined posture with respect to the translational direction of the first division mold 11.

The demarcation surface 112 is composed of a vertical demarcation surface 1121 and a parallel demarcation surface 1122. The vertically demarcated surface 1121 is continuous with the inner edge of the inclined split surface 1112 at one side edge, and extends in the vertical direction in a posture perpendicular to the translational direction of the first split mold 11. The vertically defined surface 1121 has a flat portion and a raised portion whose side surface is locally raised in a substantially trapezoidal shape in accordance with the main surface shape of the molded body P2 from the flat portion. The shape of the raised portion may be changed in various ways, and the raised portion may be omitted. In place of or in addition to the raised portion, the vertical demarcation plane 1121 may have a recessed portion that is locally depressed or recessed. The shape of the depressed portion may be changed in various ways. At the center of the vertically defined surface 1121 (or the raised portion), a convex portion 1124 protruding in the translational direction of the first split mold 11 is provided. The convex portion 1124 may be omitted. The parallel demarcation surface 1122 is continuous with the other side edge of the vertical demarcation surface 1121 at one side edge, and extends in the vertical direction in a posture parallel to the translational direction of the first split mold 11. .. The parallel demarcation surface 1122 has a flat portion and a raised portion whose side surface is locally raised in a substantially trapezoidal shape in accordance with the side shape of the molded body P2 from the flat portion. The raised portion may be omitted.

The second division surface 113 is composed of a vertical division surface 1131 and an inclined division surface 1132. The vertically divided surface 1131 is continuous with the other side surface of the first divided mold 11 at the outer edge, and extends in the vertical direction in a posture perpendicular to the translational direction of the first divided mold 11. The inclined division surface 1132 is continuous with the inner edge of the vertical division surface 1131 at the outer edge, and extends in the vertical direction in an inclined posture with respect to the translational direction of the first division mold 11.

The second division mold 12 has a first division surface 121, a demarcation surface 122, and a second division surface 123.

The first division surface 121 is composed of a vertical division surface 1211 and an inclined division surface 1212. The vertical division surface 1211 is continuous with one side surface of the second division mold 12 at the outer edge, and is in the translational direction of the second division mold 12 (before and after the direction approaching the first division mold 11 is the front). It extends vertically in a posture perpendicular to the direction). The inclined split surface 1212 is continuous with the inner edge of the vertical split surface 1211 at the outer edge, and extends in the vertical direction in an inclined posture with respect to the translational direction of the second split mold 12.

The demarcation surface 122 is composed of a vertical demarcation surface 1221 and a parallel demarcation surface 1222. The vertically demarcated surface 1221 is continuous with the inner edge of the inclined split surface 1212 at one side edge, and extends in the vertical direction in a posture perpendicular to the translational direction of the first split mold 11. The vertically defined surface 1221 has a flat portion and a raised portion whose side surface is locally raised in a substantially trapezoidal shape in accordance with the main surface shape of the molded body P2 from the flat portion. The shape of the raised portion may be changed in various ways, and the raised portion may be omitted. In place of or in addition to the raised portion, the vertical demarcation plane 1221 may have a recessed portion that is locally depressed or recessed. The shape of the depressed portion may be changed in various ways. At the center of the vertically defined surface 1221 (or the raised portion), a convex portion 1124 protruding in the translational direction of the first split mold 11 is provided. The convex portion 1124 may be omitted. The parallel demarcation surface 1222 is continuous with the other side edge of the vertical demarcation surface 1221 at one side edge, and extends in the vertical direction in a posture parallel to the translational direction of the first split mold 11. .. The parallel demarcation surface 1222 has a flat portion and a raised portion whose side surface is locally raised in a substantially trapezoidal shape in accordance with the side shape of the molded body P2 from the flat portion. The raised portion may be omitted.

The second division surface 123 is composed of a vertical division surface 1231 and an inclined division surface 1232. The vertically divided surface 1231 is continuous with the other side surface of the second divided mold 12 at the outer edge, and extends in the vertical direction in a posture perpendicular to the translational direction of the second divided mold 12. The inclined split surface 1232 is continuous with the inner edge of the vertical split surface 1231 at the outer edge, and extends in the vertical direction in an inclined posture with respect to the translational direction of the second split mold 12.

As shown in FIG. 3, the first divided mold 11 and the second divided mold 12 abut on each other on the vertical divided surfaces 1111, 1131, 1211, and 1231 of the divided surfaces 111 and 121. On the other hand, the first division mold 11 and the second division mold 12 are separated from each other at the inclined division surfaces 1112, 1132, 1212, 1232 with an interval d included in the range of 1 to 30 μm. In such a state, the first split mold 11 and the second split mold 12 come into contact with each other to form a shape corresponding to the shape of a part (or all of the side surfaces) of the main surface and the side surface of the molded body P2. It is configured to form a cavity 100 having a cavity 100.

The inner edges of the inclined dividing surfaces 1112 and 1212 that are in contact with each other and the inner edges of the inclined dividing surfaces 1132 and 1232 that are in contact with each other form a ridgeline or an edge portion of the molded body P2, respectively. Will be done.

Therefore, the plurality of split dies 11 and 12 are driven so as to be in contact with each other on the inclined split surfaces 1112 and 1212 constituting the split surfaces 111 and 121, while being displaced in a direction different from the translation direction. The situation is definitely avoided. Further, the gap d between the inclined dividing surfaces 1112 and 1212 and the gap d between the inclined divided surfaces 1132 and 1232 are included in the range of 1 to 30 μm, and the raw material powder having an average particle size equal to or larger than the gap is a cavity. The situation where the gap d protrudes from 100 is suppressed. As a result, it is surely prevented that the relative positional deviation of the plurality of split dies 11 and 12 due to the appearance of the situation occurs in a direction different from the translational direction, and the molding accuracy of the cavity 100, and thus the powder molding, is prevented. The shape accuracy of the body P2 is improved.

(Structure of powder molding equipment)
The powder molding apparatus as the first embodiment of the present invention shown in FIG. 1 includes a mold 10 as the first embodiment of the present invention shown in FIG. The powder molding apparatus includes a first mold drive mechanism 110 and a second mold drive mechanism 120 for horizontally translating each of the first split mold 11 and the second split mold 11, and the first split mold 11. And to raise and lower the upper punch 21 and the lower punch 22 and the upper punch 21 and the lower punch 22 which are inserted from the upper direction and the lower direction into the cavity formed by the contact of the second split die 12 respectively. The first elevating drive mechanism 210 and the second elevating drive mechanism 220 are further provided.

(Sintered body manufacturing method)
In the method for producing a powder molded product as the first embodiment of the present invention, the powder molding apparatus as the first embodiment of the present invention is used (see FIGS. 1 to 3).

First, each of the first split mold 11 and the second split mold 12 is translated and driven so as to be closer to each other by each of the first mold drive mechanism 110 and the second mold drive mechanism 120. Then, the first split mold 11 and the second split mold 12 are in contact with each other, and the sides of the cavity 100 are defined by the demarcation surfaces 112 and 122 (see FIG. 4 (1)). The lower punch 22 is driven ascending by the second elevating drive mechanism 220 and inserted into the cavity 100 (see FIG. 4 (1)). The timing at which the lateral side of the cavity 100 and the lower punch 22 are inserted may be reversed in chronological order or may be simultaneous.

In this state, the raw material powder P1 is charged into the cavity 100 by, for example, a powder supply device (not shown) (see FIG. 4 (2)). Subsequently, the upper punch 21 is driven downward by the first elevating drive mechanism 210, inserted into the cavity 100, and moved to a predetermined position before pressurization (see FIG. 4 (3)). After that, the raw material powder P1 is pressure-molded by driving at least one of the upper punch 21 and the lower punch 22 so that the upper punch 21 and the lower punch 22 are relatively close to each other (FIG. 4 (4). )reference). Next, each of the first split mold 11 and the second split mold 12 is translated and driven so as to be separated from each other (see FIG. 4 (5)). The upper punch 21 may be driven up first before the first split die 11 and the second split die 12 are separated from each other. After that, both the upper punch 21 and the lower punch 22 are driven ascending to take out the powder molded body P2 from the cavity 100 (see FIG. 4 (6)). Alternatively, from the state of FIG. 4 (5), a vertical drive mechanism is provided on the plate on which the first split mold 11 and the second split mold 12 are mounted, and the first split mold 11 and the second split mold 12 are formed. It may be driven downward. Then, the powder molded body P2 is heat-treated or sintered in a sintering furnace to produce a sintered body.

(Second Embodiment)
(Mold configuration)
The mold 10 as the second embodiment of the present invention shown in FIG. 5 has a first division surface in the first division mold 11 as compared with the mold 10 of the first embodiment (see FIG. 2). The configurations of the first division surface 121 and the second division surface 123 in the second division mold 12 and the second division surface 113 are different from those of the 111 and the second division surface 113. Since the other configurations of the mold 10 of the second embodiment are substantially the same as those of the mold 10 of the first embodiment (see FIG. 2), the same reference numerals are given to the same configurations as those of the first embodiment. And the description will be omitted.

The first division surface 111 is composed of a vertical division surface 1111, an inclined division surface 11121, and a parallel division surface 11122. The vertical division surface 1111 is continuous with one side surface of the first division mold 11 at the outer edge, and is in the translational direction of the first division mold 11 (before and after the direction approaching the second division mold 12 is the front). It extends in the vertical direction at the lower part of the first split mold 11 in a posture perpendicular to the direction). The inclined split surface 11121 is continuous with one side surface of the first split mold 11 and is vertically inclined with respect to the translational direction of the first split mold 11 at the upper part of the first split mold 11. It is postponed. The parallel division surface 11122 is continuous with the lower edge of the inclined division surface 11121 at the rear end edge, continuous with the upper edge of the vertical division surface 1111 at the front end edge, and parallel to the translational direction of the first division mold 11. It extends horizontally in a good posture.

The second division surface 113 is composed of a vertical division surface 1131, an inclined division surface 11321, and a parallel division surface 11322. The vertically divided surface 1131 is continuous with one side surface of the first divided mold 11 at the outer edge, and is in a posture perpendicular to the translational direction of the first divided mold 11, and is the lower portion of the first divided mold 11. It extends in the vertical direction. The inclined split surface 11321 is continuous with one side surface of the first split mold 11 and is vertically inclined with respect to the translational direction of the first split mold 11 at the upper part of the first split mold 11. It is postponed. In the present embodiment, the inclined division surface 11321 is parallel to the inclined division surface 11121. The parallel division surface 11322 is continuous with the lower edge of the inclined division surface 11321 at the rear end edge, continuous with the upper edge of the vertical division surface 1131 at the front end edge, and is parallel to the translational direction of the first division mold 11. It extends horizontally in a good posture.

The first division surface 121 is composed of a vertical division surface 1211, an inclined division surface 12121, and a parallel division surface 12122. The vertical division surface 1211 is continuous with one side surface of the second division mold 12 at the outer edge, and is in the translational direction of the second division mold 12 (before and after the direction approaching the first division mold 11 is the front). It extends in the vertical direction at the lower part of the first split mold 11 in a posture perpendicular to the direction). The inclined split surface 12121 is continuous with one side surface of the second split mold 12, and is vertically inclined with respect to the translational direction of the second split mold 12 at the upper part of the first split mold 11. It is postponed. The parallel division surface 12122 is continuous with the lower edge of the inclined division surface 12121 at the rear end edge, continuous with the upper edge of the vertical division surface 1211 at the front end edge, and parallel to the translational direction of the second division mold 12. It extends horizontally in a good posture.

The second division surface 123 is composed of a vertical division surface 1231, an inclined division surface 12321, and a parallel division surface 12322. The vertical division surface 1231 is continuous with one side surface of the second division mold 12 at the outer edge, and is in a posture perpendicular to the translational direction of the second division mold 12, and is the lower portion of the first division mold 11. It extends in the vertical direction. The inclined split surface 12321 is continuous with one side surface of the second split mold 12, and is vertically inclined with respect to the translational direction of the second split mold 12 at the upper part of the first split mold 11. It is postponed. In the present embodiment, the inclined division surface 12321 is parallel to the inclined division surface 12121. The parallel division surface 12322 is continuous with the lower edge of the inclined division surface 12321 at the rear end edge, continuous with the upper edge of the vertical division surface 1231 at the front end edge, and parallel to the translational direction of the second division mold 12. It extends horizontally in a good posture.

As shown in FIG. 6A, the first split mold 11 and the second split mold 12 abut on each other on the vertical split planes 1111, 1131, 1211, and 1231 of the split planes 111 and 121. On the other hand, as shown in FIGS. 6A and 6B, the first split mold 11 and the second split mold 12 are included in the inclined split surface 11121, 11321, 12121, 12321 in the range of 1 to 30 μm. They are separated from each other with an interval d1. Further, as shown in FIG. 6A, the first division mold 11 and the second division mold 12 have an interval d2 included in the range of 1 to 30 μm on the parallel division surfaces 11122, 11322, 12122, 12322. They are separated from each other. In such a state, the first split mold 11 and the second split mold 12 are in contact with each other to form a cavity 100 having a shape corresponding to the shape of the side surface of the molded body P2. ..

Since the configuration of the powder molding apparatus including the mold 10 of the second embodiment of the present invention and the method of manufacturing the sintered body are the same as those of the first embodiment described above, the description thereof will be omitted.

(Third Embodiment)
Like the mold 10 as the third embodiment of the present invention shown in FIG. 7, the shape of the cavity 100 and the demarcation surface defining the cavity 100 may be different from that of the first embodiment of the present invention.

(Sintered body manufacturing method)
In the method for producing a powder molded product as the second embodiment of the present invention, the powder molding apparatus as the third embodiment of the present invention is used (see FIG. 7).

First, each of the first split mold 11 and the second split mold 12 is translated and driven so as to be closer to each other by each of the first mold drive mechanism 110 and the second mold drive mechanism 120. Then, the first split mold 11 and the second split mold 12 are in contact with each other, and the sides of the cavity 100 are defined by the demarcation surfaces 112 and 122 (see FIG. 8 (1)). The lower punch 22 is driven ascending by the second elevating drive mechanism 220 and inserted into the cavity 100 (see FIG. 8 (1)). At this time, the rod 224 inserted through the through hole 222 of the lower punch 22 protrudes upward from the tip of the lower punch 22. The timing at which the lateral side of the cavity 100 and the lower punch 22 are inserted may be reversed in chronological order or may be simultaneous.

In this state, the raw material powder P1 is charged into the cavity 100 by, for example, a powder supply device (not shown) and is filled in the cavity 100 so as to surround the rod 222 (see FIG. 8 (2)).

Subsequently, the upper punch 21 is driven downward by the first elevating drive mechanism 210, inserted into the cavity 100, and moved to a predetermined position before pressurization (see FIG. 8 (3)). At this time, the rod 222 is inserted into the receiving space 212 of the upper punch 21.

After that, the raw material powder P1 is pressure-molded by driving at least one of the upper punch 21 and the lower punch 22 so that the upper punch 21 and the lower punch 22 are relatively close to each other (FIG. 8 (4). )reference).

Next, each of the first split mold 11 and the second split mold 12 is translated and driven so as to be separated from each other (see FIG. 8 (5)). The upper punch 21 may be driven up first before the first split die 11 and the second split die 12 are separated from each other.

Then, both the upper punch 21 and the lower punch 22 are driven upward, and the rod 224 is driven downward relative to the lower punch 22, so that the powder molded body P2 is taken out from the cavity 100 (see FIG. 8 (6)). ). Alternatively, from the state of FIG. 8 (5), a vertical drive mechanism is provided on the plate on which the first split mold 11 and the second split mold 12 are mounted, and the first split mold 11 and the second split mold 12 are mounted. It may be driven downward. Then, the powder molded body P2 is heat-treated or sintered in a sintering furnace to produce a sintered body.

(Fourth Embodiment)
Like the mold 10 as the fourth embodiment of the present invention shown in FIG. 9A, the inclined dividing surfaces 1112, 1132, 1212, 1232 are not substantially flat as in the first embodiment of the present invention. It may be composed of a substantially bent surface that is bent along a line segment extending in the vertical direction.

(Fifth Embodiment)
Like the mold 10 as the fifth embodiment of the present invention shown in FIG. 9B, the inclined dividing surfaces 1112, 1132, 1212, 1232 are not substantially flat as in the first embodiment of the present invention. It is composed of substantially bent surfaces that are bent along a line segment extending in the vertical direction, and the other plane that is bent with respect to one plane is substantially parallel to the translational direction of the split molds 11 and 12. It may be extended to.

(Sixth Embodiment)
While the first division surface 111, 121 is composed of the vertical division surface 1111, 1211 and the inclined division surface 1112, 1212, as in the mold 10 as the sixth embodiment of the present invention shown in FIG. 10A. , The second division surface 113, 123 may be composed of only the vertical division surface.

(7th Embodiment)
Like the mold 10 as the seventh embodiment of the present invention shown in FIG. 10B, the first division surfaces 111 and 121 are the vertical division surfaces 1111 and 1211 and the inclined division surface 1112 as in the sixth embodiment. , 1212, while the second division planes 113, 123 may be composed of only the vertical division planes.

(Other Embodiments of the present invention)
In the above embodiment, the mold is divided into two divided molds, but as another embodiment, the mold may be divided into a plurality of divided molds having three or more.

10 ... Mold, 11 ... 1st split mold, 12 ... 2nd split mold, 21 ... Upper punch, 22 ... Lower punch, 100 ... Cavity, 110 ... 1st mold drive mechanism, 120 ... 2nd mold Drive mechanism, 111, 121 ... 1st division surface, 112, 122 ... Demarcation surface, 113, 123 ... 2nd division surface, 210 ... 1st elevating drive mechanism, 212 ... Upper punch receiving space for rod, 220 ... Second elevating drive mechanism, 222 ... Lower punch through hole, 224 ... Rod, 1111 ... Vertical division surface, 1112 ... Inclined division surface, 1131 ... Vertical division surface, 1132 ... Inclined division surface, 1211 ... Vertical division surface, 1212 ... Inclined division surface, 1231 ... Vertical division surface, 1232 ... Inclined division surface, P1 ... Raw material powder, P2 ... Powder molded body.

Claims (5)

A plurality of split dies that form cavities according to the side shape of the powder molded body by abutting against each other, a mold drive mechanism for relatively translating the plurality of split dies, and the plurality of split dies. A powder provided with an upper punch and a lower punch inserted into the cavity formed by a die from above and below, respectively, and an elevating drive mechanism for raising and lowering each of the upper punch and the lower punch. It ’s a molding device,
Each of the plurality of divided dies is inclined with respect to the translational direction of the divided dies when viewed from the vertical direction of the divided dies , and an inclined divided surface extending in the vertical direction . A division surface that is connected to the outer edge of the inclined division surface, extends in each of the right and left directions, and has a vertical division surface that is perpendicular to the translational direction of the division mold , and the division surface. It has or has a demarcated surface that is connected to the inner edge of the inclined dividing surface and defines the cavity.
Each of the plurality of divided dies is inclined with respect to the translational direction of the divided dies when viewed from the vertical direction of the divided dies, and the inclined divided surfaces extending in the vertical direction. A division surface provided on the lower edge side of the inclined division surface and having a vertical division surface perpendicular to the translational direction of the division mold, and arranged on the inner edge of the inclined division surface and the vertical division surface. And has a demarcating surface that defines the cavity.
Each of the plurality of divided dies abuts on the vertical divided surface of the divided surfaces, while the inclined divided molds are in contact with each other in a state of being separated from each other at intervals included in the range of 1 to 30 μm. A powder molding apparatus characterized in that the cavity is formed by contacting the cavity. In the powder molding apparatus according to claim 1,
Each of the divided molds of the plurality of divided molds has, in addition to the inclined divided surface and the vertical divided surface, a parallel surface parallel to the translational direction.
Each of the plurality of divided dies abuts on the vertical divided surface of the divided surfaces, while being separated from each other on the parallel surface in addition to the inclined divided surface at intervals included in the range of 1 to 30 μm. A powder molding apparatus characterized in that the cavity is formed by abutting each other in a state of being in contact with each other. In the powder molding apparatus according to claim 1 or 2.
A convex portion for forming a concave portion or a through hole in the molded body is projected from the demarcated surface of at least one of the plurality of divided dies in the translational direction of the at least one divided die. A powder forming apparatus characterized by being provided. It is a powder molded body manufacturing method for manufacturing a powder molded body by using a plurality of divided dies that form cavities according to the side surface shape of the powder molded body by being relatively translated and abutting against each other.
Each of the plurality of divided dies is inclined with respect to the translational direction of the divided dies when viewed from the vertical direction of the divided dies , and an inclined divided surface extending in the vertical direction . A division surface that is connected to the outer edge of the inclined division surface, extends in each of the right and left directions, and has a vertical division surface that is perpendicular to the translational direction of the division mold , and the division surface. It has or has a demarcated surface that is connected to the inner edge of the inclined dividing surface and defines the cavity.
Each of the plurality of divided dies is inclined with respect to the translational direction of the divided dies when viewed from the vertical direction of the divided dies, and the inclined divided surfaces extending in the vertical direction. A division surface provided on the lower edge side of the inclined division surface and having a vertical division surface perpendicular to the translational direction of the division mold, and arranged on the inner edge of the inclined division surface and the vertical division surface. And has a demarcating surface that defines the cavity.
Each of the plurality of divided dies abuts on the vertical divided surface of the divided surfaces, while the inclined divided molds are in contact with each other in a state of being separated from each other at intervals included in the range of 1 to 30 μm. A method for producing a powder molded product, which is configured to form the cavity by contacting the cavity. A mold provided with a plurality of split dies that form cavities according to the side surface shape of a powder molded body or a sintered body by being relatively translated and abutting against each other.
Each of the plurality of divided dies is inclined with respect to the translational direction of the divided dies when viewed from the vertical direction of the divided dies , and an inclined divided surface extending in the vertical direction . A division surface that is connected to the outer edge of the inclined division surface, extends in each of the right and left directions, and has a vertical division surface that is perpendicular to the translational direction of the division mold , and the division surface. It has or has a demarcated surface that is connected to the inner edge of the inclined dividing surface and defines the cavity.
Each of the plurality of divided dies is inclined with respect to the translational direction of the divided dies when viewed from the vertical direction of the divided dies, and the inclined divided surfaces extending in the vertical direction. A division surface provided on the lower edge side of the inclined division surface and having a vertical division surface perpendicular to the translational direction of the division mold, and arranged on the inner edge of the inclined division surface and the vertical division surface. And has a demarcating surface that defines the cavity.
Each of the plurality of divided dies abuts on the vertical divided surface of the divided surfaces, while the inclined divided dies are in contact with each other in a state of being separated from each other at intervals included in the range of 1 to 30 μm. A mold characterized in that it is configured to form the cavity by contacting it.

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