JP2002192391A - Die filling method for material powder, powder forming die device, and material feeding body for powder forming die device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a die filling method for material powder, a powder forming die device, and material feeding body for the powder forming device capable of smoothly replacing the material powder and air in a pressed powder body forming hole, and making the density dispersion of the formed pressed powder body uniform. SOLUTION: The powder forming die device is constituted of a die plate 30 provided with the forming hole 20 pressed powder body having an opening 10 on its upper side, a material feeding body 40 provided slidably on the die plate 30 and movably toward the upper side of the opening 10, and holding inside a material powder M of the pressed powder body, and a moving mechanism 50 for moving the material feeding body 40 toward the opening 10, and on the lower face 40 of, a feeding port 60 for feeding the material powder M to the forming hole 20 pressed powder body. The material feeding body 40 is provided with an air discharge pipe 70 for discharging the air turned out from the forming hole 20 for the pressed powder body being displaced with the material powder M in the pressed powder body forming hole 20 to the outside of the material feeding body 40 on the tip position F in the moving direction toward the opening 10 of the feeding port 60.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of filling a raw material powder into a mold for forming a green compact used for manufacturing a sintered part, a powder molding die apparatus, and a raw material supply member of the powder molding die apparatus. About.

[0002]

2. Description of the Related Art A green compact used for manufacturing a sintered part is formed by press-forming a raw material powder such as carbon, Cu, or Fe in a mold. FIG. 6 shows a conventional powder molding die apparatus B used for forming such a green compact. The powder molding die apparatus B includes a die plate 30 provided with a green compact molding hole 200 having an opening 100 on the upper side.
0, and is provided so as to be slidable on the die plate 300 and movably above the opening 100.
Raw material supply body 400 holding therein the raw material and raw material supply body 40
0 to move the opening mechanism 100 toward the opening 100
A supply port 60 for supplying the raw material powder M to the green compacting hole 200 is provided on the lower surface of the raw material supply body 400.
0 is provided. The supply port 600 is connected to the opening 10.
0 and is slightly larger than
Is located above the opening 100, the raw material powder M of the green compact is supplied into the green compact forming hole 200 from the entire opening 100.

In the powder molding die apparatus B having the above configuration, the raw material supply body 400 is
It is placed on the upper side and stands by at a position away from the opening 100 (for example, on the right side in FIG. 6). This raw material supply body 40
0 is moved toward the opening 100 by the moving mechanism 500, and from the one side (the right side in FIG. 6) of the opening 100 to the other side (the left side in FIG. 6) of the opening 100 above the green compact forming hole 200. Move while sliding. Along with this movement, the raw material powder M is filled so as to be sequentially dropped from the supply port 600 provided below the raw material supply body 400 into the green compact forming hole 200.

[0004]

However, according to such a conventional method of filling a raw material powder into a mold, there are the following problems. That is, the air that is displaced with the raw material powder M in the green compact forming hole 200 and is expelled from the green compact forming hole 200 is kept in the opening portion while the raw material supply member 400 does not completely close the opening portion 100. 100 raw material suppliers 400
Gradually escapes into the atmosphere from the portion corresponding to the front in the moving direction, but when the raw material supply body 400 comes to a position as shown in FIG. 6 which covers the opening 100, not only the inside of the raw material supply body 400 Unless the raw material powder M deposited on the upper side of the supply port 60 is pushed away, the raw material powder M cannot go out of the green compact forming hole 200. Then, it becomes difficult for the raw material powder M to be exchanged with the air in the green compacting hole 200,
Inevitably, the raw material powder M is filled into the green compact forming hole 200 in a state where the raw material powder M contains extra air and non-uniformly. For this reason, there is a problem that a considerable difference occurs in the weight of the raw material powder M to be filled, in other words, in the density of the formed green compact.

[0005] The present invention has been made in view of the above circumstances, and smoothly replaces the raw material powder and the air in the green compact forming hole to uniformly reduce the density variation of the formed green compact. It is an object of the present invention to provide a method for filling a raw material powder into a die, a powder molding die apparatus, and a raw material supply body of the powder molding die apparatus.

[0006]

According to a first aspect of the present invention, there is provided a green compact having an opening at an upper side of a die plate of a powder molding die apparatus. A raw material powder mold that is slid and moved above the forming hole to fill the raw material powder by dropping the raw material powder into the green compact forming hole from a supply port provided below the raw material supply body. In a filling method, the raw material supply body is moved from one side of the opening to the other side of the opening above the green compact forming hole, and the raw material powder is moved together with the movement of the raw material supply body. The air is sequentially dropped into the green compact forming hole, and the air that is replaced with the raw material powder in the green compact forming hole and is expelled from the green compact forming hole is moved from the leading end position of the supply port in the direction of the movement. It is characterized by discharging to the outside of the raw material supply That.

In the present invention, the air in the green compact forming hole to be replaced with the raw material powder is extracted to the outside of the raw material supply body, and the raw material powder is filled in the green compact forming hole in a state where it does not mix with the air. Is done. When the raw material supply body is moved from one side of the opening to the other side, the raw material powder is sequentially dropped from one side of the green compact forming hole to the other side along with this movement. It is filled so as to be filled. For this reason, the air accumulated in the green compact forming hole is displaced by the raw material powder in the direction of movement of the raw material supply body. The air expelled from the green compact forming hole is discharged without resistance from the front end position in the direction of movement of the supply port to the outside of the raw material supply body without being interrupted by the raw material powder, so that the raw material powder and the pressure are compressed. The air in the powder molding hole is smoothly replaced. In this way, the raw material powder is prevented from being filled with extra air, and the weight variation of the raw material powder to be filled can be made uniform.

According to a second aspect of the present invention, there is provided the method for filling a raw material powder into a mold according to the first aspect, wherein the air is forcibly discharged to the outside of the raw material supply body.

In the present invention, by effectively discharging the air in the green compact forming hole, the weight variation of the raw material powder filled in the green compact forming hole can be made more uniform.

According to a third aspect of the present invention, there is provided a die plate provided with a green compact forming hole having an opening on the upper side, and slidable on the die plate and movable above the opening. And a moving mechanism for moving the raw material supply body toward the opening, the raw material supply body being provided at a lower surface of the raw material supply body. A powder molding die apparatus provided with a supply port for supplying the raw material powder to a powder molding hole, wherein the raw material supply body is replaced with the raw material powder in the green compact molding hole. Air discharging means for discharging air expelled from the green compact forming hole to the outside of the raw material supply body,
The supply port is provided at a tip position in a direction of movement toward the opening.

[0011] With this configuration, the air in the green compact forming hole to be replaced with the raw material powder is evacuated to the outside of the raw material supply body, and the green compact is formed in a state where the raw material powder does not mix with the air. Is filled in the hole. When the raw material supply body is moved from one side of the opening to the other side, the raw material powder is sequentially dropped from one side of the green compact forming hole to the other side along with this movement. It is filled so as to be filled. For this reason, the air accumulated in the green compact forming hole is displaced by the raw material powder in the direction of movement of the raw material supply body. The air expelled from the green compact forming hole is not obstructed by the raw material powder stored in the raw material supply body, but is not blocked outside the raw material supply body by the air discharging means provided at the end position in the moving direction of the supply port. By discharging with a resistor, the raw material powder and the air in the green compact forming hole are smoothly replaced. In this way, the raw material powder is prevented from being filled with excess air, and the weight variation of the raw material powder to be filled can be made uniform.

According to a fourth aspect of the present invention, there is provided the powder molding die apparatus according to the third aspect, wherein the air discharge means is an air discharge pipe extending from the supply port to the outside of the raw material supply body. It is characterized by having.

With this configuration, the air that is displaced from the raw material powder in the green compact forming hole and expelled from the green compact forming hole is not blocked by the raw material powder stored in the raw material supply body. Since the raw material powder is discharged from the air discharge pipe, the raw material powder and the air in the green compact forming hole are smoothly replaced. In this way, the raw material powder is prevented from being filled with extra air, and the weight variation of the raw material powder to be filled can be made uniform.

According to a fifth aspect of the present invention, in the powder molding die apparatus according to the fourth aspect, the air discharge pipe has at least a width of the opening in a direction intersecting with the moving direction. And a gutter portion extending and having a side facing the opening of the green compact forming hole serving as the air intake.

Since the raw material supply body is moved in one direction, the raw material powder is moved substantially simultaneously in the direction intersecting with the movement direction of the raw material supply body at the leading end position in the moving direction of the supply port. Into the compacting hole.
Therefore, in the present invention, the side extending at least with the width of the opening is provided in the direction intersecting the direction of the movement and at the tip end of the supply port into which the raw material powder is dropped. By providing a gutter portion serving as an air intake, air expelled from the green compact forming hole by the raw material powder is not interrupted by the raw material powder stored in the raw material supply body. From the air outlet and is discharged to the outside through the air discharge pipe. In this way, the air in the green compact forming hole is effectively extracted to the outside of the raw material supply body, so that the raw material powder and the air in the green compact forming hole are smoothly replaced. In this way, the raw material powder is prevented from being filled with extra air, and the weight variation of the raw material powder to be filled can be made uniform.

According to a sixth aspect of the present invention, there is provided a powder molding die apparatus according to any one of the third to fifth aspects, wherein
The air discharging means is provided with a forced discharging means for forcibly discharging the air.

[0017] With this configuration, the air in the green compact forming hole is effectively discharged, so that the weight variation of the raw material powder filled in the green compact forming hole can be further uniformed. Can be.

The invention according to claim 7 is provided so as to be slidable on a die plate provided with a green compact forming hole having an opening on the upper side and to be movable above the opening.
A raw material supply body for a powder molding die apparatus, wherein a supply port for supplying the raw material powder held therein to the green compact forming hole is provided on a lower surface, wherein the raw material supply body includes the green compact. Air discharging means for discharging air expelled from the raw material supply body by displacing the raw material powder in the body forming hole and being expelled from the green compact forming hole, a direction of movement of the supply port toward the opening; Characterized by being provided at the tip position.

With this configuration, the air in the green compact forming hole to be replaced with the raw material powder is evacuated to the outside of the raw material supply body, and the green compact is formed in a state where the raw material powder does not mix with the air. Is filled in the hole. When the raw material supply body is moved from one side of the opening to the other side, the raw material powder is sequentially dropped from one side of the green compact forming hole to the other side along with this movement. It is filled so as to be filled. For this reason, the air accumulated in the green compact forming hole is displaced by the raw material powder in the direction of movement of the raw material supply body. The air expelled from the green compact forming hole is not obstructed by the raw material powder stored in the raw material supply body, but is not blocked outside the raw material supply body by the air discharging means provided at the end position in the moving direction of the supply port. By discharging with a resistor, the raw material powder and the air in the green compact forming hole are smoothly replaced. In this way, the raw material powder is prevented from being filled with extra air, and the weight variation of the raw material powder to be filled can be made uniform.

According to an eighth aspect of the present invention, there is provided the powder supply mold apparatus according to the seventh aspect, wherein the air discharge means is provided with air extending from the supply port to the outside of the raw material supply body. It is a discharge pipe.

With this configuration, the air that is displaced by the raw material powder in the green compact forming hole and expelled from the green compact forming hole is not blocked by the raw material powder stored in the raw material supply body. Since the raw material powder is discharged from the air discharge pipe, the raw material powder and the air in the green compact forming hole are smoothly replaced. In this way, the raw material powder is prevented from being filled with extra air, and the weight variation of the raw material powder to be filled can be made uniform.

According to a ninth aspect of the present invention, in the raw material supply body of the powder molding die apparatus according to the eighth aspect, the air discharge pipe has at least the opening in a direction intersecting the moving direction. And a gutter portion extending with the width of the portion and facing the opening of the green compact forming hole is provided as the air intake.

Since the raw material supply body is moved in one direction, the raw material powder is moved substantially simultaneously in the direction intersecting with the movement direction of the raw material supply body at the leading end position in the moving direction of the supply port. Into the compacting hole.
Therefore, in the present invention, the side extending at least with the width of the opening is provided in the direction intersecting the direction of the movement and at the tip end of the supply port into which the raw material powder is dropped. By providing a gutter portion serving as an air intake, air expelled from the green compact forming hole by the raw material powder is not interrupted by the raw material powder stored in the raw material supply body. From the air outlet and is discharged to the outside through the air discharge pipe. In this way, the air in the green compact forming hole is effectively extracted to the outside of the raw material supply body, so that the raw material powder and the air in the green compact forming hole are smoothly replaced. In this way, the raw material powder is prevented from being filled with extra air, and the weight variation of the raw material powder to be filled can be made uniform.

According to a tenth aspect of the present invention, there is provided a raw material supply body for a powder molding die apparatus according to any one of the seventh to ninth aspects, wherein the air discharging means forcibly supplies the air. Characterized in that a forced discharge means for discharging the wastewater is provided.

With this configuration, the air in the green compact forming hole is effectively discharged, so that the weight variation of the raw material powder filled in the green compact forming hole is further uniformed. Can be.

[0026]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A method for filling a raw material powder into a die, a powder molding die apparatus and a raw material supply body of the powder molding die apparatus according to the present invention will be described below with reference to the drawings. FIG. 1 shows a first embodiment of a powder molding die apparatus according to the present invention.
In FIG. 1, the powder molding die apparatus A has an opening 1 on the upper side.
A die plate 30 provided with a green compact forming hole 20 having a diameter of 0 and a slidable and movable above the opening 10 on the die plate 30;
And a moving mechanism 50 for moving the raw material supply body 40 toward the opening 10. The lower surface of the raw material supply body 40 has a green compact forming hole 20. A supply port 60 for supplying the raw material powder M is provided. Here, the raw material supply body 40 and the supply port 60 are provided slightly larger than the opening 10.

Further, the raw material supply body 40 is replaced with the raw material powder M in the green compact forming hole 20 and the green compact forming hole 2.
An air discharge pipe 70 (air discharge means) for discharging air expelled from the outside to the outside of the raw material supply body 40 is provided at the supply port 60.
1 is provided at the tip position F in the direction of movement toward the opening 10 (the direction toward the left side in FIG. 1).

The air discharge pipe 70 has a shape as shown in FIG.
In the direction (the depth direction in FIG. 1) crossing the middle and leftward directions, it has a length substantially equal to the width of the raw material supply body 40, and thus, is larger than the width of the opening 10. Present, and the side facing the opening 10 of the green compact forming hole 20,
That is, the lower side is provided with a gutter portion 72 serving as an intake 71 for air that is replaced with the raw material powder M in the green compact forming hole 20 and expelled from the green compact forming hole 20. Then, at both ends of the gutter section 72, the discharge pipes 73,
73, and a discharge port 74 provided at the upper end,
The gutter portion 72 and the outside of the raw material supply body 40 are configured to communicate with each other via 74.

In the powder molding die apparatus A according to the present embodiment having the above configuration, the raw material supply body 40 is
Usually, it is placed on the upper side of the die plate 30 and stands by at a position distant from the opening 10 (for example, a position on the right side in FIG. 1). The raw material supply body 40 is moved toward the opening 10 by the moving mechanism 50, and from the one side (the right side in FIG. 1) of the opening 10 to the other side (the FIG. , Left). Along with this movement, the raw material powder M is filled so as to be sequentially dropped into the green compact forming hole 20 from the supply port 60 provided below the raw material supply body 40.

At this time, the air in the green compact forming hole 20 that replaces the raw material powder M is discharged to the outside of the raw material supply body 40,
The raw material powder M is filled into the green compact forming hole 20 in a state where it does not extremely mix with air. That is, when the raw material powder M is filled into the green compact forming hole 20, the air accumulated in the green compact forming hole 20 is moved in the moving direction of the raw material supply body 40 (the direction toward the left side in FIG. 1). Raw material powder M
Is pushed away by This green compact forming hole 20
So that the air expelled from the supply port 6 is not blocked by the raw material powder M stored in the raw material supply body 40.
The air discharge pipe 70 provided at the tip position F in the movement direction of 0
Is discharged to the outside of the raw material supply body 40 with substantially no resistance.

FIGS. 3 and 4 show that the raw material feeder 40 reaches the position covering the opening 10, and the air expelled from the green compact forming hole 20 flows from the air discharge pipe 70 to the outside of the raw material feeder 40. The state of being extracted is shown. Since the raw material supply body 40 is moved in one direction (the direction shown by the arrow (a) in FIGS. 3 and 4), at the front end position F in the movement direction of the supply port 60, the movement direction is changed along with the movement. The raw material powders M are dropped into the green compacting holes 20 substantially simultaneously along the intersecting directions. Therefore, it extends in the direction intersecting the direction of this movement and at the tip end position F of the supply port 60 into which the raw material powder M is dropped, with a length dimension larger than the width of the opening 10. By providing a gutter portion 72 having an air intake 71 on the side facing the portion 10, air expelled from the green compact forming hole 20 can be supplied to the material supply body 40
The raw material powder M stored therein is first taken in from the air intake 71 of the gutter 72 without being interrupted, and is discharged to the outside from the discharge port 74 through the air discharge pipe 73.

As described above, according to the present embodiment, the air in the green compact forming hole 20 is extracted without resistance to the outside of the raw material supply body 40, so that the raw material powder M and the green compact Hole 20
The air inside is smoothly replaced. Thus,
The raw material powder M is prevented from being filled with excess air, and the weight variation of the raw material powder M to be filled can be made uniform. FIG. 5 is a diagram showing the difference in the weight variation of the green compact formed by the conventional method of filling the raw material powder with the mold and the method of filling the raw material powder according to the present invention. The vertical axis shows, as an example, the weight variation of the green compact formed for manufacturing a certain sintered part,
The horizontal axis represents a difference in the moving speed of the raw material supply body 40. As is apparent from FIG.
The difference in the weight of the green compact is smaller when air is vented from zero than when air is not vented (indicated as "none" in the figure). In other words, the volume of the formed green compact is substantially constant, which indicates that the density variation of the green compact is more uniform. In other words, this indicates that a more uniform density was obtained because the raw material powder M did not contain extra air.

In the above-described embodiment, the shape of the green compact forming hole 20 formed in the die plate 30 is circular. If it has the same width as the portion, air can be discharged from the inside of the green compact forming hole.

A rotating fan (forcible discharge means) is provided near the discharge port 74 to force the flow of air toward the outside of the raw material supply body 40 and to effectively discharge air to the outside of the raw material supply body 20. May be configured. In this manner, the raw material powder M and the air in the green compact forming hole 20 are more smoothly replaced, and it is possible to prevent the raw material powder M from containing extra air.

In the above-described embodiment, the air discharge pipe 70 is provided at the front end position F of the supply port 60 and the opening 10
The discharge pipes 73 are provided so as to rise from both ends of the gutter portion 72 so as to avoid an upper punch (not shown) for forming a green compact, which is located above. It goes without saying that a configuration protruding to the side of is also possible.

Further, if the means for discharging the air in the green compact forming hole 20 from the front end position F of the supply port 60 is used, the front wall of the raw material supply body 40 may be thinned instead of the above-described structure. The supply port 60 may be provided so as to be adjacent to this wall.

In addition, since the leading end position means the leading end in the moving direction, the moving direction of the raw material supply body 40 when the raw material supply body 40 is repeatedly moved back and forth a plurality of times to perform the raw material filling is performed. May be provided before and after to make it easy for air to escape from the green compact forming hole 20 in any direction of forward and backward movement. That is, a plurality of discharge pipes may be provided at positions where air is most easily discharged as the raw material supply body 40 moves.

[0038]

The present invention has the following effects. According to the first aspect of the present invention, the raw material supply body for holding the raw material powder of the green compact is slid above the green compact forming hole having an opening above the die plate of the powder molding die apparatus. While moving, the opening is moved from one side to the other side, and when the raw material powder is sequentially dropped into the green compact forming hole with this movement, the raw material powder is replaced with the raw material powder in the green compact forming hole. The air expelled from the green compact forming hole is discharged without resistance from the leading end position in the direction of movement of the supply port to the outside of the raw material supply without being blocked by the raw material powder stored in the raw material supply. The powder and the air in the green compact forming hole can be smoothly replaced. For this reason, the raw material powder is prevented from being filled with excess air, and the weight variation of the raw material powder to be filled can be made uniform.

According to the second aspect of the present invention, when the raw material powder is filled, the air which is replaced with the raw material powder in the green compact forming hole and is expelled from the green compact forming hole is supplied to the raw material supply body. , The weight variation of the raw material powder filled in the green compact forming hole can be made more uniform.

According to the third aspect of the present invention, the die can be slid on a die plate provided with a green compact forming hole having an opening on the upper side and can be moved above the opening. The raw material supply body that holds the raw material powder of the green compact is provided, and the air that is displaced with the raw material powder and expelled from the green compact forming hole is not blocked by the raw material powder stored in the raw material supply body. Since the air discharging means for discharging the material without resistance to the outside of the raw material supply body is provided at the tip position in the moving direction of the supply port, the raw material powder and the air in the green compact forming hole can be smoothly replaced. . In this way, the raw material powder is prevented from being filled with extra air, and the weight variation of the raw material powder to be filled can be made uniform.

According to the fourth aspect of the present invention, since the air discharge means is an air discharge pipe extending from the supply port to the outside of the raw material supply body, the air discharge means is replaced with the raw material powder in the green compact forming hole. The air that has been expelled from the compacting hole is discharged from the air discharge pipe without being interrupted by the raw material powder stored in the raw material supply body, and the raw material powder is smoothly replaced with the air in the compacting hole. can do. In this way, the raw material powder is prevented from being filled with extra air,
The weight variation of the raw material powder to be filled can be made uniform.

According to the fifth aspect of the present invention, the air discharge pipe extends in a direction intersecting the moving direction of the raw material supply body.
Since a gutter portion extending at least with the width of the opening and facing the opening of the green compact forming hole is provided as an air inlet, the green compact is formed using the raw material powder. The air expelled from the hole is first taken in from the air inlet of the gutter without being blocked by the raw material powder stored in the raw material supply body, and is discharged to the outside through the air discharge pipe without resistance. In this way, the air in the green compact forming hole is effectively extracted to the outside of the raw material supply body, so that the raw material powder and the air in the green compact forming hole can be smoothly replaced. In this way, the raw material powder is prevented from being filled with extra air, and the weight variation of the raw material powder to be filled can be made uniform.

According to the sixth aspect of the present invention, since the air discharging means is provided with the forced discharging means for forcibly discharging the air, the air in the green compact forming hole is effectively removed. The weight variation of the raw material powder discharged and filled in the green compact forming hole can be made more uniform.

According to the seventh aspect of the present invention, air which is displaced by the raw material powder and expelled from the green compact forming hole is stored in the raw material supply body of the powder molding die apparatus. Air discharge means is provided at the end of the supply port in the direction of movement of the supply port so that the air can be discharged without resistance to the outside of the raw material supply body without being interrupted by the raw material powder. Can be smoothly replaced. In this way, the raw material powder is prevented from being filled with extra air, and the weight variation of the raw material powder to be filled can be made uniform.

According to the eighth aspect of the present invention, since the air discharging means is an air discharging pipe extending from the supply port to the outside of the raw material supply body, the air discharging means is replaced with the raw material powder in the green compact forming hole. The air that has been expelled from the compacting hole is discharged from the air discharge pipe without being interrupted by the raw material powder stored in the raw material supply body, and the raw material powder is smoothly replaced with the air in the compacting hole. can do. In this way, the raw material powder is prevented from being filled with extra air,
The weight variation of the raw material powder to be filled can be made uniform.

According to the ninth aspect of the present invention, the air discharge pipe extends in a direction intersecting the moving direction of the raw material supply body.
Since a gutter portion extending at least with the width of the opening and facing the opening of the green compact forming hole is provided as an air inlet, the green compact is formed using the raw material powder. The air expelled from the hole is first taken in from the air inlet of the gutter without being blocked by the raw material powder stored in the raw material supply body, and is discharged to the outside through the air discharge pipe without resistance. In this way, the air in the green compact forming hole is effectively extracted to the outside of the raw material supply body, so that the raw material powder and the air in the green compact forming hole can be smoothly replaced. In this way, the raw material powder is prevented from being filled with extra air, and the weight variation of the raw material powder to be filled can be made uniform.

According to the tenth aspect of the present invention,
Since the air discharging means is provided with a forced discharging means for forcibly discharging air, the air in the green compact forming hole is effectively discharged, and the raw material powder to be filled in the green compact forming hole is effectively removed. Weight variation can be made more uniform.

[Brief description of the drawings]

FIG. 1 is a view showing a first embodiment according to the present invention, and is a front sectional view showing an example of a powder molding die apparatus.

FIG. 2 is a view showing an air discharge pipe according to the present invention as an example, wherein (a) is a front view of the air discharge pipe, and (b) is a view showing the air discharge pipe.
It is a side view, (c) Top view.

FIG. 3 is a perspective view schematically showing a state in which raw material powder is filled into a green compact molding hole.

FIG. 4 is a top view of FIG. 3;

FIG. 5 is a diagram showing a difference in weight variation of a green compact formed by a conventional method of filling a raw material powder into a mold and a method of filling a raw material powder according to the present invention.

FIG. 6 is a front sectional view showing a conventional powder molding die apparatus.

[Explanation of symbols]

 A: powder molding die apparatus F: tip position 10: opening 20: green compacting hole 30: die plate 40: raw material supply body 50: moving mechanism 60 ... supply port 70 ... air discharge pipe 71 ... intake 72 ... gutter part 73 ... discharge pipe

Claims (10)

[Claims] 1. A raw material supply body holding a raw material powder of a green compact is slid and moved over a green compact forming hole having an opening above a die plate of a powder molding die apparatus, A method for filling a raw material powder into a mold by dropping the raw material powder into a green compact forming hole from a supply port provided below the raw material supply body, the method comprising: The raw material powder is moved from one side of the opening to the other side of the opening above the powder forming hole, and the raw material powder is sequentially dropped into the green compact forming hole with the movement of the raw material supply body. The air that is displaced with the raw material powder in the body forming hole and is expelled from the green compact forming hole is discharged to the outside of the raw material supply body from the leading end position of the supply port in the moving direction. A method for filling the raw material powder into the mold. 2. The method according to claim 1, wherein the air is forcibly discharged to the outside of the raw material supply body. 3. A die plate provided with a green compact forming hole having an opening on an upper side, and a green compact provided slidably on the die plate and movable above the opening. A raw material supply body for holding the raw material powder therein, and a moving mechanism for moving the raw material supply body toward the opening, and a lower surface of the raw material supply body has a hole in the green compact forming hole. A powder molding die apparatus provided with a supply port for supplying a raw material powder, wherein the raw material supply body is replaced with the raw material powder in the green compact forming hole, and the green compact molding apparatus is used. An air discharging means for discharging air expelled from a hole to the outside of the raw material supply body is provided at a tip position in a direction of movement of the supply port toward the opening, and a powder molding die apparatus is provided. . 4. The powder molding die apparatus according to claim 3, wherein the air discharge means is an air discharge pipe extending from the supply port to outside the raw material supply body. Powder molding die equipment. 5. The powder molding die apparatus according to claim 4, wherein the air discharge pipe is provided in a direction intersecting with the moving direction.
A powder extending at least with the width of the opening, and having a gutter portion having a side facing the opening of the green compact forming hole serving as the air intake; Molding equipment. 6. The powder molding die apparatus according to claim 3, wherein said air discharging means is provided with a forced discharging means for forcibly discharging said air. A powder molding die apparatus, characterized in that: 7. A raw material powder slidably provided on a die plate provided with a green compact forming hole having an opening on an upper side and movably above the opening, and holding the raw material powder held therein. A raw material supply body for a powder molding die apparatus, wherein a supply port for supplying powder to a green compact molding hole is provided on a lower surface, wherein the raw material supply body includes the raw material powder in the green compact molding hole. Air discharging means for discharging air expelled from the green compact forming hole by being replaced with the outside of the raw material supply body is provided at a leading end position in a direction of movement of the supply port toward the opening. A raw material supply body for a powder molding die apparatus, comprising: 8. The raw material supply body of the powder molding die apparatus according to claim 7, wherein the air discharge means is an air discharge pipe extending from the supply port to outside the raw material supply body. A raw material supply body for a powder molding die apparatus, characterized in that: 9. The raw material supply body of the powder molding die device according to claim 8, wherein the air discharge pipe is arranged in a direction intersecting with the moving direction.
A powder extending at least with the width of the opening, and having a gutter portion having a side facing the opening of the green compact forming hole serving as the air intake; Raw material supply for molding die equipment. 10. A raw material supply body for a powder molding die apparatus according to claim 7, wherein said air discharging means includes a forced discharging means for forcibly discharging said air. A raw material supply body for a powder molding die apparatus, wherein the raw material supply body is provided.