JP4632642B2 - Powder molding apparatus and powder filling method thereof - Google Patents

Description

  The present invention relates to a powder molding apparatus and a powder filling method thereof.

  In powder metallurgy, a raw material powder mainly composed of metal such as iron is compressed by a powder molding press to form a green compact, and this green compact is heated and sintered in a sintering furnace. In addition, as a raw material powder feeding device, raw material powder is supplied from a raw material container storing raw material powder into a feeder body that moves on a molding die, and from this feeder body, raw material powder is fed into a molding die device. (For example, Patent Document 1).

  In addition, as a method for producing a multilayer green compact by supplying raw material powder into multiple layers in the filling space of a molding die apparatus, the lower punch, the die and the upper surface of the core rod are placed in the same plane, and the die is The first powder filling device is advanced so as to cover the first powder, the first powder is filled while forming the first powder filling space, and then the second powder filling device is rotated forward so as to cover the die. At the same time, while forming the second powder filling space at a speed that does not generate a negative pressure, preferably the second powder filling device is shaken to fill the second powder, There has been proposed a method of compacting with a lower punch and further extracting the compact (for example, Patent Document 2).

  However, in the production of the above-mentioned multilayer green compact, since two powder filling apparatuses are used, there is a problem that the apparatus becomes complicated.

  Then, since there is what divided into the right and left inside a feeder (for example, patent documents 3), although it is not publicly known, if the left and right of the feeder are made to face back and forth, and the inside of the feeder is divided into the front and back, one feeder will make a multilayer Filling can be performed. 12 to 15, the mold 101 of the powder molding apparatus includes a die 102, a core rod 103, a lower punch 104, and an upper punch 105, and the inside of the die 102, that is, the die 102, the core rod 103, and the lower punch. A filling space 106 serving as a cavity is formed between the two and 104. The feeder partitions the inside of the feeder main body 111 back and forth, and has a first powder storage chamber 112 and a second powder storage chamber 113. Further, the feeder main body 111 is moved back and forth by the forward and backward moving means.

  Then, an example of forming a cylindrical green compact will be described. As shown in FIG. 12, the feeder main body 111 along the upper surface of the mold 101 in a state where the lower punch 104 is raised and the filling space 106 is closed. , The second powder storage chamber 113 stops at a position where it comes to the upper part of the filling space 106, and the lower punch 104 is lowered by a predetermined amount as shown in FIG. After filling the raw material powder 113G, as shown in FIG. 14, the feeder main body 111 is moved backward to a position where the first powder storage chamber 112 becomes the upper part of the filling space 106, and as shown in FIG. The lower punch 104 is lowered by a predetermined amount, and the upper portion of the filling space 106 is filled with the first raw material powder 112G. Thereafter, the feeder body 111 is retracted to the position before the movement. As a result, the first and second raw material powders 112G and 113G can be filled in layers above and below the filling space 106, the upper punch 105 is lowered, the raw material powders 112G and 113G are compressed, and the green compact is compressed. Can be molded.

  In this way, by combining the forward / backward movement of the feeder body 111 and the lifting / lowering movement of the lower punch, it is possible to form a multilayer green compact simply by driving one feeder body 111.

By the way, depending on the shape of the green compact, for example, in order to finish the corners of the green compact into a chamfered shape, when a gap is provided between the outer periphery of the lower punch and the inner periphery of the die (for example, Patent Document 4), The method may not be used. Specifically, referring to FIGS. 16 to 17, the green compact has a curved chamfered corner portion, and the die 102 is provided with a chamfered corner portion forming portion 107 corresponding thereto. When the above method is used with this mold 101, first, as shown in FIG. 16, the lower punch 104 is raised and the upper end thereof is aligned with the upper surface of the mold 101, and the feeder main body 111 along the upper surface of the mold 101. Is moved forward, the first raw material powder 112G enters between the die 102 and the outer periphery of the lower punch 104. Further, as shown in FIG. 17, the feeder main body 111 is advanced to fill the second powder storage chamber 113. When the lower punch 104 is lowered by a predetermined amount after stopping at a position where it comes to the upper part of the space 106, the second raw material powder 113G is filled on the first raw material powder 112G, and thereafter, as in FIG. Since the first raw material powder 112G is filled on the second raw material powder 113G, the first, second, and first raw material powders 112G, 113G, and 112G are formed from the bottom to form a three-layer structure. The green compact cannot be molded.

  The present invention is intended to solve such problems, and it is not necessary to use a plurality of powder feeding apparatuses, and a powder molding apparatus capable of filling a raw material powder into a plurality of layers in a filling space of a mold and the powder thereof An object is to provide a filling method.

The powder molding apparatus according to claim 1 is provided with two filling spaces that are provided in a mold and open at an upper portion thereof, and the first raw material powder and the second raw material powder are moved along the upper surface of the mold . In a powder molding apparatus provided with a feeder for filling up and down in a filling space, the feeder is provided with a feeder main body and a first powder storage provided side by side in the feeder main body for storing the first raw material powder. A second powder storage chamber for storing the chamber and the second raw material powder, a forward / backward moving means for moving the feeder body back and forth, and a left / right moving means for moving the first and second powder storage chambers to the left and right wherein the two line segments connecting the centers of the filling space without cross direction with respect to the direction and orientation of the left and right movement of the back and forth movement of the feeder body, between the outer periphery of the two filling spaces who moves back and forth above And it is provided with a spacing in the direction of the horizontal movement.

  In the powder molding apparatus according to claim 2, the left-right moving means moves the first and second powder storage chambers to the left and right with respect to the feeder body.

  In the powder molding apparatus according to claim 3, a lower mold member is provided in the filling space so as to be movable up and down, and the lower mold member descends after being filled with the first raw material powder. It is.

In the powder molding method according to claim 4, the first raw material powder and the second raw material powder are moved up and down by a feeder that moves along the upper surface of the mold in the two filling spaces of the mold having an upper opening. In the powder filling method of the powder molding apparatus filled in the feeder, the feeder is provided side by side in the feeder main body, the first powder storage chamber for storing the first raw material powder, and the second powder feeder. and a second powder storage chamber for accommodating a raw material powder, the line segment connecting the centers of the two filling spaces the cross direction to the direction of the direction and the horizontal movement of the front and rear movement of the feeder body None , an interval is provided between the outer circumferences of the two filling spaces in the front-rear movement direction and the left-right movement direction, and the feeder main body moves in the front-rear direction from the start position so that it can Said After filling the filling space with the first raw material powder, the second powder storage chamber moves onto the plurality of filling spaces and fills the filling space with the second raw material powder from the second powder storage chamber. Thereafter, the feeder main body moves in the direction opposite to the front-rear direction and returns to the start position.

  The powder molding method according to claim 5 is a method in which the first and second powder storage chambers move relative to the feeder main body when the second powder storage chamber moves onto the filling space.

  According to the structure of Claim 1, a feeder main body is advanced on a metal mold | die, a 1st powder storage chamber is located on a filling space, and it fills with a 1st raw material powder from this 1st powder storage chamber. To fill. Thereafter, the first and second powder storage chambers are moved left and right by the left and right moving means, the second powder storage chamber is positioned above the filling space, and the second raw material powder is moved from the second powder storage chamber. Is filled into the filling space. Thereafter, the feeder main body is moved back as it is, and the first and second raw material powders are filled in two layers in the filling space. Therefore, the first powder storage chamber does not move twice over the filling space, and reliable two-layer molding is possible. In addition, since the first raw material powder is filled after moving forward and left and right, and the second raw material powder is filled after moving left and right, the filling space can be filled uniformly with the raw material powder.

  According to the second aspect of the present invention, the first and second powder storage chambers are moved left and right with respect to the feeder body by the right and left moving means. It will be something.

  According to the third aspect of the present invention, after the first raw material powder is filled, the lower mold member is lowered, and the second raw material powder is filled into the filling space by the lowered amount.

  According to the configuration of the fourth aspect, the first powder storage chamber does not move twice over the filling space, and reliable two-layer molding is possible. In addition, since the first raw material powder is filled after moving forward and left and right, and the second raw material powder is filled after moving left and right, the filling space can be filled uniformly with the raw material powder.

  Moreover, according to the structure of Claim 5, a feeder main body needs only a general back-and-forth movement, and a process is performed smoothly.

  Preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The embodiments described below do not limit the contents of the present invention described in the claims. In addition, all of the configurations described below are not necessarily essential requirements of the present invention. In each embodiment, by adopting a new powder molding apparatus and its powder filling method different from the conventional one, an unprecedented powder molding apparatus and its powder filling method can be obtained. Describe each.

  Embodiments of the present invention will be described below with reference to the accompanying drawings. 1 to 8 show a first embodiment of the present invention. As shown in FIG. 1, the mold 1 of the powder molding apparatus has an up-down direction as an axial direction (press up-down axis direction). It consists of a fixed die 2, a core rod 3, a lower punch 4, and an upper punch 5 held by an upper punch holder (not shown). Inside the die 2, that is, the die 2 and the upper punch 5 and the lower A filling space 6 as a cavity is formed between the punch 4 and the punch 4.

  The die 2 has a substantially cylindrical shape, and the substantially cylindrical core rod 3 is coaxially positioned in the die 2. The lower punch 4 is a lower mold member, is substantially cylindrical, is fitted between the die 2 and the core rod 3 so as to be movable up and down from below, and the inner peripheral surface of the large-diameter portion 2A of the die 2 and the lower A gap 12 is formed with the outer peripheral surface of the punch 4. Further, the lower portion of the large diameter portion 2A is a step portion 2B, and a chamfered corner portion forming portion 2C is provided between the large diameter portion 2A of the step portion 2B. The upper punch 5 has a substantially cylindrical shape and is fitted between the die 2 and the core rod 3 so as to be movable up and down from above and detachably. The chamfered corner portion forming portion 2C is a portion that forms a corner portion of the green compact in a chamfered shape.

  On the other hand, the feeder 21 includes a feeder main body 22 having an opening at the bottom, and a storage box 23 having an opening at the bottom is provided in the feeder main body 22 so as to be movable in the left-right direction. Further, side walls 24R and 24L are provided, and the interior of the storage box 23 is partitioned into first and second powder storage chambers 25 and 26 by a partition wall 24C at the center in the left-right direction. The left and right widths of the first and second powder storage chambers 25 and 26 are substantially equal, and the left and right width of the space 27 between the feeder body 22 and the storage box 23 is the same as that of the powder storage chambers 25 and 26. It is formed almost equally. One end of a hose (not shown) serving as a raw material supply path is connected to the upper part of the first and second powder storage chambers 25 and 26, and the other end of each hose is connected to a hopper (not shown). One end of each hose moves in unison with the first and second powder storage chambers 25 and 26. The raw material powders G1 and G2 in the hoppers are supplied to the powder storage chambers 25 and 26, respectively.

  The mold 1 further includes a front / rear moving means 31 that moves the feeder body 22 back and forth in a sliding state along the upper surface of the mold 1. The feeder 21 is provided with left and right moving means 32 for moving the storage box 23 to the left and right with respect to the feeder main body 22. The left and right moving means 32 is incorporated in the feeder main body 22. The left / right moving means 32 can be constituted by an expansion / contraction cylinder or the like provided in the feeder main body 22. The storage box 23 is moved in the feeder main body 22 by the expansion / contraction of the expansion / contraction cylinder using hydraulic power or air pressure as a power source. Alternatively, the left and right moving means 32 may be constituted by an electric motor and a moving mechanism that converts the electric motor into movement of the storage box.

  As shown in FIG. 8, the green compact 7 formed by the mold 1 has a cylindrical shape, upper and lower raw material powders G2 and G1 form a layer, and the upper surface thereof is tapered so that the inner side is lowered. It has an inclined surface 71 inclined, and the lower corner portion 72 of the outer periphery has a shape that is chamfered in a curved shape by the chamfered corner portion forming portion 2C. The sintered body obtained by sintering the green compact 7 is used for a valve seat or the like, and a valve (not shown) is in contact with the layer of the raw material powder G1 forming the inclined surface 71, Although the outer periphery fits into a receiving member (not shown), the lower corner portion 72 serves as a guide and fits into the receiving member from the lower corner portion 72 side.

  Next, the effect | action is demonstrated about the said structure. First, as shown in FIG. 5, the lower punch 4 is fixed at a first filling height position, and the upper end of the lower punch 4 is above the step portion 2B. As shown in FIG. 1, the feeder 21 is an initial position in front of the filling space 6, and the first powder storage chamber 25 is located at the center of the feeder body 22. Then, the feeder main body 22 is advanced by the forward / backward moving means 31, and as shown in FIG. 2, the forward movement is stopped at the position where the first powder storage chamber 25 is located above the filling space 6, and the first operation is stopped. The first raw material powder G1 is dropped and filled into the filling space 6 from the powder storage chamber 25, the feeder main body 22 is stopped by the forward movement stop, and then the left and right moving means 32 is used to store the storage box 23 in the stopped feeder main body 22. Moves in the left-right direction (right direction in FIG. 2), and as shown in FIGS. 3 and 6, the second powder storage chamber 26 comes to stop on the filling space 6 and stops on the filling space 6. After the second powder storage chamber 26 is positioned, as shown in FIG. 7, the lower punch 4 is lowered to the second filling height position and stopped, and this first filling height position is the lower punch 4 position. Is at the same position as the step 2B. When the second powder storage chamber 26 is positioned on the filling space 6, the second raw material powder G <b> 2 is dropped from the second powder storage chamber 26 into the filling space 6, and the second powder powder G <b> 2 is placed on the filling space 6. After the powder storage chamber 26 is located, as shown in FIG. 4, the forward / backward moving means 31 is driven to retract the feeder main body 22 to the initial position, and then stops, and the left and right moving means 32 causes the first powder to move. The storage chamber 25 returns to the center of the feeder body 22.

  Then, before the feeder main body 22 moves forward, the upper punch 5 descends and is inserted into the upper portion of the filling space 6, and the raw powders G1, G2 are inserted between the die 2 and the core rod 3 by the upper and lower punches 5, 4. Is compressed to form a green compact 7. The compressed green compact 7 is pushed up from the filling space 6 by raising the upper end of the lower punch 4 to the upper surface position of the mold 1, and the feeder main body 22 moves forward. The green compact 7 is pushed forward by being pushed by the front surface of the feeder body 22.

  As described above, in this embodiment, corresponding to claim 1, the filling space 6 provided in the mold 1 and opened at the upper part, the first raw material powder G1 and the second raw material powder G1 moving along the upper surface of the mold 1 are provided. In a powder molding apparatus provided with a feeder 21 for vertically filling the raw material powder G2 into the filling space 6, the feeder 21 is provided as a first raw material provided side by side on the feeder main body 22 and within the feeder main body 22. A first powder storage chamber 25 for storing the powder G1, a second powder storage chamber 26 for storing the second raw material powder G2, a back-and-forth moving means 31 for moving the feeder body 22 back and forth, and first and second Left and right moving means 32 for moving the powder storage chambers 25, 26 left and right, the feeder main body 22 is advanced on the mold 1, and the first powder storage chamber 25 is positioned on the filling space 6, Fill the filling space 6 with the first raw material powder G1 from the first powder storage chamber 25. The Thereafter, the first and second powder storage chambers 25 and 26 are moved to the left and right by the left and right moving means 32, the second powder storage chamber 26 is positioned above the filling space 6, and the second powder storage chamber 26. To filling the filling space 6 with the second raw material powder G2. Thereafter, the feeder main body 22 is moved back as it is, and the filling space 6 is filled with the first and second raw material powders G1 and G2 in two layers. Therefore, the first powder storage chamber 25 does not move twice over the filling space 6 and a reliable two-layer molding is possible. Further, after moving forward and left and right, the first raw material powder G1 is filled, and after moving left and right and moved backward and filled with the second raw material powder G2, the raw material powders G1 and G2 are uniformly distributed in the filling space 6. Can be filled.

  In this way, in this embodiment, in correspondence with claim 2, the left and right moving means 32 moves the first and second powder storage chambers 25 and 26 to the left and right with respect to the feeder main body 22. The main body 22 needs only a general forward / backward movement and has a simple structure.

  In this way, in this embodiment, corresponding to claim 3, the lower punch 4 as the lower mold member is provided in the filling space 6 so as to be movable up and down, and the lower punch 4 is filled first. After the first raw material powder G1 which is the raw material powder is filled, it descends, so the second raw material powder G2 which is the raw material powder to be filled later is filled in the filling space 6 by the amount of the lower punch 4 descending. The

  Thus, in this embodiment, corresponding to claim 4, the first raw material powder G1 is fed by the feeder 21 that moves along the upper surface of the mold 1 into the filling space 6 of the mold 1 that is open at the top. In the powder filling method of the powder molding apparatus that vertically fills the second raw material powder G2, the feeder 21 is provided side by side on the feeder main body 22 and the feeder main body 22, and stores the first raw material powder G1. A first powder storage chamber 25 and a second powder storage chamber 26 for storing the second raw material powder G2, and the feeder main body 22 moves in the front-rear direction from the start position, so that the first powder storage chamber 25 After filling the filling space 6 with the first raw material powder G1, the second powder storage chamber 26 moves onto the filling space 6 and the second raw material powder G2 enters the filling space 6 from the second powder storage chamber 26. Thereafter, the feeder body 22 is moved in the direction opposite to the front-rear direction. Since it moves and returns to the starting position, the first powder storage chamber 26 does not move twice over the filling space 6 and a reliable two-layer molding is possible. Further, after moving forward and left and right, the first raw material powder G1 is filled, and after moving left and right and moved backward and filled with the second raw material powder G2, the raw material powders G1 and G2 are uniformly distributed in the filling space 6. Can be filled.

Thus, in this embodiment, corresponding to claim 5, when the second powder storage chamber 26 moves over the filling space 6, the first and second powder storage chambers 25, 26 from moving relative to I over da body 22, the feeder body 22 common back-and-forth movement only requires only, process can be performed smoothly.

  FIG. 9 shows a second embodiment of the present invention. The same parts as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted. 6 is an example in which two filling spaces 6 and 6 are arranged in an oblique direction, and this oblique direction means that a line segment S connecting the centers of the filling spaces 6 and 6 is in the longitudinal movement direction of the feeder body 22. On the other hand, the crossing direction is the crossing direction with respect to the left-right direction, and a space K is provided between the outer circumferences of the filling spaces 6 and 6 in the front-rear direction and the left-right direction. The connected line segment S forms an angle of approximately 45 degrees with the front-rear direction.

As described above, in this embodiment , the line segment S connecting the centers of the two filling spaces 6 and 6 forms a crossing direction with respect to the forward / backward movement direction and the left / right movement direction of the feeder main body 22, and the two filling spaces. Spaces K and K are provided between the outer circumferences 6 and 6 in the forward and backward movement direction and the left and right movement direction, and the filling spaces 6 and 6 are arranged in an oblique direction, thereby producing the following advantages. First, when the filling spaces 6 and 6 are arranged in the front-rear direction, when the green compact 7 is discharged by the feeder main body 22, the green compact 7 pushed by the feeder main body 7 collides with the center of the front green compact 7. There is a risk of both being damaged. On the other hand, by arranging the filling spaces 6 and 6 in an oblique direction, the green compact 7 pressed by the feeder main body 22 does not hit the center of the front green compact 7, so that damage can be prevented. In particular, if the distance K is provided in the left-right direction, the green compacts 7 do not collide with each other. On the other hand, in order to prevent the compacts 7 and 7 from colliding with each other, when the filling spaces 6 and 6 are simply arranged in the left and right direction, the left and right dimensions of the mold 1 and, consequently, the left and right dimensions of the feeder body 22 are increased. Although the type | mold 1 enlarges, the enlargement of the left-right direction can be suppressed by arrange | positioning diagonally. In addition, in the present invention, the powder storage chambers 25, 26 move forward / left / right to be filled with the first raw material powder G1, and after moving left / right / backward, the second raw material powder G2 is filled. 6 and 6 are arranged in an oblique direction, and even if the front and rear, left and right positions of the filling spaces 6 and 6 are shifted, the filling of the raw material powders G1 and G2 into the filling spaces 6 and 6 can be performed uniformly.

  10 to 11 show a third embodiment of the present invention. The same parts as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted. In the feeder 21 of this example, The inside of the feeder body 22 is divided into first and second powder storage chambers 25 and 26 by a partition wall 24C at the center in the left-right direction. There is no storage box, and the feeder body 22 has a left-right moving means incorporated therein. Not. The mold 1 includes front / rear / left / right moving means 33 for moving the feeder body 22 forward / backward and left / right. Therefore, in this example, the forward / backward / left / right moving means 33 is a forward / backward moving means, which is the left / right moving means.

  As in the first embodiment, the lower punch 4 is first fixed at the first filling height position, and the upper end of the lower punch 4 is above the step portion 2B. . As shown by the solid line in FIG. 10, in the feeder 21, the first powder storage chamber 25 of the feeder body 22 is located at an initial position in front of the filling space 6. Then, the forward / backward / left / right moving means 33 advances the feeder main body 22 and stops the forward movement operation at the position where the first powder storage chamber 25 is positioned above the filling space 6 as shown by the broken line in FIG. The first raw material powder G1 is dropped and filled from the first powder storage chamber 25 into the filling space 6, and the feeder main body 22 is stopped by the forward movement stop, and thereafter, the forward / backward / left / right moving means 33 shows the solid line in FIG. Thus, the feeder main body 22 moves in the left-right direction (left direction in FIG. 11), the second powder storage chamber 26 comes over the filling space 6 and stops, and the second powder is put on the filling space 6. After the storage chamber 26 is located, the lower punch 4 is lowered to the second filling height position and stopped. The first filling height position is such that the upper end of the lower punch 4 is substantially at the same position as the step 2B. It is. When the second powder storage chamber 26 is positioned on the filling space 6, the second raw material powder G <b> 2 is dropped from the second powder storage chamber 26 into the filling space 6, and the second powder powder G <b> 2 is placed on the filling space 6. After the powder storage chamber 26 is located, as shown by the broken line in FIG. 11, the front / rear / left / right moving means 33 is driven to move the feeder main body 23 backward, and further, the left / right reverse direction is moved to stop. The powder storage chamber 25 is returned to the center of the feeder body 22.

  Thus, in this embodiment, corresponding to claim 1, the feeder 21 is provided with the feeder main body 22 and the left and right sides of the feeder main body 22, and the first powder containing the first raw material powder G1. A storage chamber 25 and a second powder storage chamber 26 for storing the second raw material powder G2, a front-rear and left-right movement means 33 as a front-rear movement means for moving the feeder body 22 back and forth, and first and second powder storage chambers In this embodiment, the filling space 6 of the mold 1 whose upper part is opened is provided in correspondence with the fourth aspect. In the powder filling method of the powder molding apparatus in which the first raw material powder G1 and the second raw material powder G2 are filled up and down by a feeder 21 that moves along the upper surface of the mold 1, the feeder 21 is a feeder. Main body 22 and side by side in feeder body 22 Provided with a first powder storage chamber 25 for storing the first raw material powder G1 and a second powder storage chamber 26 for storing the second raw material powder G2. To the filling space 6 from the first powder storage chamber 25, and then the second powder storage chamber 26 moves onto the filling space 6 to fill the second powder storage chamber 26. The filling space 6 is filled with the second raw material powder G2, and then the feeder main body 22 moves in the direction opposite to the front-rear direction and returns to the starting position. Therefore, the first powder storage chamber 26 is filled with the filling space 6 It is possible to perform reliable two-layer molding without moving twice. Further, after moving forward and left and right, the first raw material powder G1 is filled, and after moving left and right and moved backward and filled with the second raw material powder G2, the raw material powders G1 and G2 are uniformly distributed in the filling space 6. It can be filled and has the same action and effect as the first embodiment.

  In addition, this invention is not limited to the said Example, A various deformation | transformation implementation is possible. For example, various types of sintered bodies obtained from green compacts can be used.

  As described above, the present invention does not require the use of a plurality of powder feeders, can fill the filling space of the mold with multiple layers of the raw material powder, and uniformly fills the filling space with the raw material powder. It can be applied to various two-layer powder molded products.

It is a top view of the metal mold | die which made the cross section of a part of feeder which shows 1st Example of this invention, and a feeder main body exists in an initial position. It is a top view same as the above, a feeder main body advances, and a 1st powder storage chamber is located on a filling space. It is a top view same as the above and the 2nd powder storage chamber is located on the filling space. It is a top view same as the above, the feeder main body retracts, and the feeder main body is in the initial position. It is sectional drawing same as the above, and is the state which filled the 1st raw material powder in the filling space. It is sectional drawing same as the above, and shows the state which the 2nd powder storage chamber is located in the filling space. It is a top view same as the above, and is the state which filled the filling material space with 2nd raw material powder. It is sectional drawing of a green compact same as the above. It is a top view of the metal mold | die which made some cross sections the feeder which shows 2nd Example of this invention. It is a top view of the metal mold | die which made a part of feeder the cross section which shows 3rd Example of this invention, and demonstrates the process in which a feeder main body moves on filling space from an initial position. It is a top view same as the above, The process in which a feeder main body moves to the initial position from the position above a filling space is demonstrated. It is sectional drawing of the metal mold | die which shows a prior art example, and the 2nd powder storage chamber is located on the filling space. It is sectional drawing same as the above, and shows the state which filled the 2nd raw material powder into the filling space. It is sectional drawing same as the above, and a 1st powder storage chamber is located on the filling space. It is sectional drawing same as the above, and shows the state which filled the filling material with the 1st raw material powder. It is sectional drawing of the metal mold | die which shows the other conventional example, and shows the state which the 1st raw material powder fell between die | dye and a lower mold member. It is sectional drawing same as the above, and shows the state which filled the 2nd raw material powder into the filling space.

Explanation of symbols

1 Mold 4 Lower punch (Lower mold member)
6 Filling space
21 Feeder
22 Feeder body
23 Storage box
25 First powder storage room
26 Second powder storage room
31 Forward / backward means
32 Means to move left and right
33 Forward / backward / left / right moving means
S line segment K interval

Claims (5)

Two filling spaces that are provided in the mold and open at the top, and a feeder that moves along the upper surface of the mold to fill the two filling spaces up and down with the first raw material powder and the second raw material powder; The feeder includes: a feeder main body; a first powder storage chamber that is provided side by side in the feeder main body and stores the first raw material powder; and the second raw material powder. a second powder storage chamber for storing includes a longitudinal moving means for moving the feeder body back and forth, and left and right moving means for moving the first and second powder storage chamber to the right and left, the two filling spaces No direction and cross direction with respect to the direction of the horizontal movement center line connecting the moving the front and rear of the feeder body, the direction and the left and right longitudinal movement between the outer periphery of the two filling spaces in the direction of the movement Powder molding apparatus characterized in that a interval are. 2. The powder molding apparatus according to claim 1, wherein the left-right moving means moves the first and second powder storage chambers to the left and right with respect to the feeder body. The lower mold member is provided in the filling space so as to be movable up and down, and the lower mold member descends after being filled with the first raw material powder. Powder molding equipment. Powder filling of a powder molding apparatus in which the first raw material powder and the second raw material powder are filled up and down by two feeders moving along the upper surface of the die in the two filling spaces of the die opened at the top. In the method, the feeder includes a feeder main body, a first powder storage chamber that is provided side by side in the feeder main body and stores the first raw material powder, and a second powder that stores the second raw material powder. and a housing chamber, wherein two line segments connecting the centers of the filling space without cross direction with respect to the direction and orientation of the horizontal movement of the front and rear movement of the feeder body, of the two filling spaces An interval is provided between the outer circumferences in the forward / backward movement direction and the left / right movement direction, and the feeder main body moves in the front / rear direction from the start position to move the first raw material powder from the first powder storage chamber to the filling space. The After filling, the second powder storage chamber moves onto the plurality of filling spaces, and the second raw material powder is filled from the second powder storage chamber into the filling space. A powder filling method for a powder molding apparatus, wherein the feeder body moves in a direction and returns to the start position. The powder of the powder molding apparatus according to claim 4, wherein when the second powder storage chamber moves onto the filling space, the first and second powder storage chambers move relative to the feeder body. Filling method.

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