WO2019053884A1

WO2019053884A1 - Continuous multilayer molding machine

Info

Publication number: WO2019053884A1
Application number: PCT/JP2017/033486
Authority: WO
Inventors: 山本努; 安澤耕樹
Original assignee: 三庄インダストリー株式会社; エヌピーエーシステム株式会社
Priority date: 2017-09-15
Filing date: 2017-09-15
Publication date: 2019-03-21
Also published as: KR20190130006A; JPWO2019053884A1; JP6369821B1; KR102238241B1

Abstract

Provided is a continuous multilayer molding machine with which the molding time is reduced and that can be flexibly used for multilayer molding. A continuous multilayer molding machine (X) includes: a raw-material supply part (1); a raw-material transport part (2), which can move linearly and in which a plurality of boxes (21) are connected to one another in a straight line; and a press molding part (3) including a mold (34b) that has an interior space into which a raw material is loaded, wherein the raw-material transport part (2) brings a discharge opening (27) provided in a first box (21) into communication with the interior space of the mold (34b) and injects the raw material, and subsequently brings a discharge opening (27) provided in a second box (21), which is immediately behind the first box (21) in the moving direction, into communication with the interior space of the mold (34b) and injects the raw material.

Description

Continuous multilayer molding machine

The present invention relates to a continuous multi-layer molding machine for continuously multi-layer molding raw materials such as powders.

Conventionally, there is known a press molding machine provided with a mold having an internal space (cavity) into which powder is introduced, and a pressing portion (upper punch and lower punch) for pressing powder (for example, a patent) See documents 1 and 2). In this press molding machine, after the powder is supplied from the hopper in which the powder is stored to the feeder box through the hose, the feeder box is continued until the discharge opening formed at the bottom of the feeder box communicates with the internal space of the mold Is moved to fill the inner space with powder. Then, after retracting the feeder box, the upper punch and the lower punch sandwich and pressurize the powder in the inner space, and press molding is performed.

JP, 2010-240697, A JP 2002-20802 A

By the way, an artificial tooth formed using zirconia powder as a raw material creates an appearance similar to that of a natural tooth by laminating and pressing a powder of a plurality of colors. Conventionally, in order to stack such multi-colored powder in the inner space of the mold, it is necessary to prepare a plurality of feeder boxes and repeat the reciprocating movement of the feeder box a plurality of times, which requires time for molding. Was. Also, in order to move a plurality of feeder boxes without interference, it is necessary to provide radial moving lanes in the circumferential direction of the mold, and the hopper for supplying powder to the feeder box is also in the circumferential direction of the mold It was necessary to arrange a plurality of For this reason, the arrangement | positioning space of these moving lanes and a hopper is limited, and it can not respond, when the kind of powder increases.

Therefore, there is a demand for a continuous multilayer molding machine which can shorten the molding time and can flexibly cope with multilayer molding.

The characteristic configuration of the continuous multilayer molding machine includes: a raw material supply unit having a plurality of storage tanks for storing raw materials; and a plurality of supply ports for separately supplying the raw materials stored in the plurality of storage tanks;
A plurality of boxes including a top plate on which a plurality of supply ports and a supply port connectable to each of the supply ports are formed, and a bottom portion on the opposite side of the top plate to which a discharge opening capable of discharging the raw material is formed. A linearly movable raw material conveying portion having a plurality of the boxes connected in a state of being linearly arranged;
A mold having an internal space into which the raw material is introduced, and a press forming portion having a pressing portion inserted into the internal space to press the raw material,
The raw material conveying portion communicates the discharge opening formed in the first box with the inner space of the mold to be filled with the raw material, and then the rear side of the moving direction with respect to the first box The discharge opening formed in the second adjacent box is communicated with the inner space of the mold to be filled with the raw material.

In this configuration, the top plate of a plurality of boxes is provided with a supply port which can be connected separately to the supply port of the raw material supply unit, and the plurality of boxes are linearly arranged. For this reason, even when the types of raw materials increase, a box may be added to maintain the linear shape, and a space for arranging a storage tank around the box can be sufficiently secured.

In addition, since the raw material conveyance unit linearly moves the plurality of boxes simultaneously and sequentially charges the raw materials from the discharge opening of each box to the inner space of the mold, the filling of the raw materials is completed in one reciprocating movement. For this reason, compared with the case where each box is separately reciprocated, the molding time can be extremely shortened. As described above, the continuous multilayer molding machine of the present configuration can shorten the molding time, and can flexibly cope with multilayer molding.

Another feature of the present invention is that the raw material supply unit has a connecting portion connecting a plurality of the supply ports, and the connecting portion is slid along the top surface of the top plate to move the plurality of the raw members. The connection or non-connection between the supply port and the plurality of supply ports can be simultaneously switched.

In this configuration, connection or non-connection between the plurality of supply ports for supplying the raw material from the storage tank and the supply ports of the plurality of boxes can be simultaneously switched. For this reason, it is possible to promptly replenish the raw materials to a plurality of boxes in which the filling of the raw materials into the inner space of the mold is completed, and the molding time can be shortened. In addition, if the feed port and the supply port are disconnected when the raw material transfer unit moves, there is no inconvenience that the raw material different from the raw material to be originally supplied to the box is erroneously supplied from the other feed port. .

Another feature is that a circular opening is formed in plan view in the internal space of the mold;
The discharge opening of the box is formed in a crescent shape having a first arc portion on the outer circumference side and a second arc portion on the inner circumference side having a smaller arc length than the first arc portion,
With the linear movement of the raw material transfer unit, the second circular arc portion starts connecting to the outer periphery of the circular opening.

As in the present configuration, by connecting the second arc part on the inner peripheral side of the crescent-shaped discharge opening to the outer periphery of the circular opening, the communication area is enlarged rapidly as when communicating the circular holes with each other. There is nothing to do. As a result, for example, in the case of a powder material, the powder can be prevented from being blown up by filling at once, and the packing density can be increased. As a result, it is possible to prevent such a disadvantage that air is mixed between the powder when press molding to cause breakage or deformation of the molded product.

In another characteristic configuration, the pressing portion is sealed in a movable first pressing portion that can be inserted into the internal space from one side of the mold, and the internal space from the other side of the mold in a sealed state A fixed second pressing portion inserted;
When the said raw material conveyance part is filled with the said raw material to the said internal space, it is in the point comprised so that the said 2nd press part may be vibrated.

As in the present configuration, by filling the raw material while vibrating the second pressing portion that closes the mold, for example, in the case of a powder raw material, it is possible to break the bridge between the powder and to increase the packing density. As a result, it is possible to prevent such a disadvantage that air is mixed between the powder when press molding to cause breakage or deformation of the molded product.

It is a side view of a continuous multilayer molding machine. It is a top view which shows the supply port of a raw material supply part. It is an enlarged side view of a box. It is an IV-IV arrow line view of FIG. It is a front view of a continuous multilayer molding machine. It is an enlarged view of a die unit. It is a conceptual diagram which is supplying powder to a box from a materials supply part. It is a conceptual diagram which shows the state which completed supply of the powder with respect to the box. It is a conceptual diagram which shows the state before supplying a powder to a metal mold | die. It is a conceptual diagram which shows the state in front of supplying a powder to a metal mold | die. It is a conceptual diagram which shows the state which is sequentially supplying powder to a metal mold | die. It is a conceptual diagram which shows the state which press-molds powder. It is a block diagram of a control part. It is an operation | movement flowchart of a continuous multilayer molding machine.

Hereinafter, an embodiment of a continuous multilayer molding machine according to the present invention will be described based on the drawings. In the present embodiment, a continuous multilayer forming machine X will be described, in which zirconia powders of multiple colors with different pigment content (an example of a raw material, hereinafter referred to as "powder") are stacked in five layers and press-molded. However, without being limited to the following embodiments, various modifications can be made without departing from the scope of the invention.

As shown in FIG. 1, the continuous multilayer forming machine X includes a raw material supply unit 1, a raw material conveyance unit 2, a press molding unit 3, and a control unit 5.

As shown in FIGS. 1 to 2, the raw material supply unit 1 has a plurality of (five in the present embodiment) storage tanks 11 storing a plurality of powders separately, and the respective storage tanks 11 and flexible. A plurality of (five in the present embodiment) supply ports 13 in which the openings connected by the elastic hoses 12 are round holes, and a slide movement mechanism 14 for sliding the supply ports 13.

The storage tank 11 is formed in the shape of a truncated cone whose diameter decreases toward the connection port of the hose 12. The powder is dropped to the supply port 13 through the hose 12 by applying vibration to the storage tank 11 by the tank vibrator 11 a.

The plurality of supply ports 13 separately supply the powder stored in the plurality of storage tanks 11 to a plurality of boxes 21 described later. As shown in FIGS. 2 to 3, the plurality of supply ports 13 are connected by a long plate-like connecting portion 13a. The connecting portion 13a slides along a slide shaft 13b (a plate surface of a top plate 22 described later) fixed to a side wall guide plate 24 described later by a slide driving unit 13c configured by a hydraulic cylinder, an air cylinder, etc. It is configured to be possible. That is, the slide movement mechanism 14 is configured by the connection portion 13a, the slide shaft 13b, and the slide drive portion 13c.

As shown in FIGS. 1 and 3, the raw material conveyance unit 2 includes a plurality of boxes 21 linearly arranged by being connected by the top plate 22, and a mounting floor 23 on which the plurality of boxes 21 are mounted. A side wall guide plate 24 for guiding the movement of the plurality of boxes 21, a rectilinear movement driving unit 25 for moving the box 21 rectilinearly, and a mounting floor elevation driving unit 26 for moving the mounting floor 23 up and down are provided.

As shown in FIG. 3, each box 21 has a top plate 22, an upper flange 21 a fixed to the top plate 22, a side wall 21 b adjacent to the upper flange 21 a, and the top plate 22 with respect to the side wall 21 b A lower flange 21d is formed between the side wall 21b and the bottom 21c and has the same width (the width in the direction of the slide shaft 13b) as the upper flange 21a. As shown in FIG. 2, in the top plate 22, a plurality of circular hole-shaped supply ports 21 a 1 connectable to the plurality of supply ports 13 are formed, and the corresponding supply ports from the respective supply ports 13 are formed. Powder is supplied to the inside of the box 21 through 21a1. In the present embodiment, although the top plate 22, the upper flange 21a, and the lower flange 21d are constituted by a single member for a plurality of boxes 21, the top plate 22, the upper flange 21a, and The lower flange 21d may be provided, and the plurality of top plates 22, the upper flange 21a, and the lower flange 21d may be connected, and is not particularly limited.

As shown in FIG. 4, a discharge opening 27 capable of discharging powder is formed on the bottom of the bottom 21 c of the box 21 on the opposite side to the top plate 22. The discharge opening 27 is formed in a crescent shape having a first circular arc portion 27a on the outer peripheral side and a second circular arc portion 27b on the inner peripheral side having a smaller circular arc length than the first circular arc portion 27a. The box 21 is arranged to move while sliding the bottom surface of the bottom portion 21 c to the top surface of the mounting floor 23.

As shown in FIG. 1, the side wall guide plate 24 and the rectilinear movement driving unit 25 are fixed to the mounting floor 23. The mounting floor 23 is configured to be capable of moving up and down in a state in which the level is maintained by the mounting floor lifting and lowering drive unit 26 supported by the support base 26 a fixed to the floor surface.

As shown in FIG. 3, the pair of side wall guide plates 24 are provided on both side walls of the mounting floor 23, and two wheels 24 a are rotatably fixed to the respective side wall guide plates 24. The four wheels 24 a abut on the upper flange 21 a and the lower flange 21 d of the box 21 to guide the linear movement of the box 21 by the linear movement drive unit 25.

As shown in FIG. 1, the rectilinear movement drive unit 25 rectilinearly moves the plurality of boxes 21 by means of a pusher 25a that can reciprocate by a drive source such as a hydraulic cylinder or an air cylinder. The mounting floor elevation driving unit 26 moves up and down in a state where the mounting floor 23 is maintained horizontally by a driving source such as a hydraulic cylinder or an air cylinder.

As shown in FIGS. 1 and 5, the press forming unit 3 includes a support frame body 31, an upper press unit 32, a lower press unit 33, and a mold unit 34.

The support frame 31 includes a plurality of (four in the present embodiment) support columns 31a, a rectangular plate-like upper girder 31b and a rectangular plate-like lower girder 31c fixed to both ends of each of the support struts 31a, And a support base 31d fixed to the surface and supporting the lower girder 31c. Further, the support frame 31 is provided with four guide support columns 38 supported across the upper girder 31 b and the lower girder 31 c.

The upper press portion 32 is supported by a first pressing portion 32a forming a circular flat tip end surface 32a1, a rectangular plate-like upper press support portion 32b supporting the first pressing portion 32a, and the upper girder 31b. And an upper press drive unit 32c configured by a hydraulic cylinder, an air cylinder, or the like for moving the pressing unit 32a up and down. A plurality of (four in this embodiment) cylindrical portions 32b1 are formed at the corners of the upper press support portion 32b, and the cylindrical portions 32b1 are extrapolated to the guide support 38. The upper press support portion 32b, the cylindrical portion 32b1, and the guide support 38 function as a guide when the first press portion 32a of the upper press portion 32 moves up and down by the upper press drive portion 32c.

The lower pressing portion 33 is fixed to the second pressing portion 33a forming the circular flat tip end surface 33a1 and the lower girder 31c, and supports the second pressing portion 33a in a state where vertical vibration of the second pressing portion 33a is allowed. And a lower press vibrating portion 33c supported by the lower girder 31c and vertically vibrating the second pressing portion 33a. The second pressing portion 33a is inserted into an inner space of a mold 34b to be described later in a sealed state, and a tip end surface 33a1 forms a bottom surface of the inner space.

As shown in FIGS. 5 to 6, the mold unit 34 includes a rectangular plate-shaped movable plate 34a in contact with the lower surface of the mounting floor 23, and a hollow cylindrical mold 34b embedded in the center of the movable plate 34a. , And a mold lifting drive unit 37 for moving the mold 34 b and the movable plate 34 a up and down. The mold 34b has an internal space having a circular opening 34b1 in a plan view (upper view in FIG. 6) with the bottom surface 33a1 of the second pressing portion 33a described above as a bottom surface, and powder inside the internal space Is thrown.

The mold 34 b is supported by the mounting floor 23 such that the upper surface of the mold 34 b is flush with the upper surface of the mounting floor 23. A plurality of (four in the present embodiment) cylindrical portions 34a1 are formed at the corners of the movable plate 34a, and the cylindrical portions 34a1 are extrapolated to the guide support 38 (see FIG. 1). The mold lifting and lowering drive unit 37 lifts and lowers the mold 34 b, the movable plate 34 a, and the mounting floor 23 horizontally by a driving source such as a hydraulic cylinder or an air cylinder. The movable plate 34a, the cylindrical portion 34a1, and the guide support 38 function as a guide when the mold 34b moves up and down by the mold elevating drive section 37.

As shown in FIG. 13, the control unit 5 includes a tank vibrator 11a, a slide drive unit 13c, a linear movement drive unit 25, a mounting floor elevation drive unit 26, an upper press drive unit 32c, and a lower press vibration unit 33c. And the operation of the mold raising and lowering drive unit 37. Further, in the present embodiment, the input device 6 capable of setting each sequence of the control unit 5 is provided. Based on the output information from the position sensor (not shown), the control unit 5 drives the slide drive unit 13c, the rectilinear movement drive unit 25, the mounting floor lift drive unit 26, and the mold lift drive unit 37. Are controlled to control the drive amount of the upper press drive unit 32c based on the output information from a load sensor (not shown). Although the control unit 5 is configured by software with a CPU and a memory that execute various processes as a core, it may be configured by hardware, or may be configured by cooperating hardware and software. I do not care.

Subsequently, the operation of the continuous multilayer molding machine X will be described based on the flowchart of FIG.

First, when the operator instructs the operation of the continuous multilayer forming machine X by the input device 6, as shown in FIG. 7, the slide drive unit 13c is configured to receive each of the supply ports 21a1 of the five boxes 21 and the material supply unit 1 The connecting portion 13a is moved along the slide shaft 13b (the plate surface of the top plate 22) so that each of the three supply ports 13 is separately connected. Then, each storage tank 11 is vibrated by the tank vibrator 11 a to gravity-drop five types of powder having different pigment content ratios stored in the five storage tanks 11 into five boxes 21 for supply. (# 10 in FIG. 14).

Next, as shown in FIG. 8, the slide drive unit 13 c moves the connection portion 13 a along the slide shaft 13 b (the plate surface of the top plate 22) to integrally slide the supply ports 13. The supply ports 21a1 of the five boxes 21 and the supply ports 13 of the raw material supply unit 1 are not connected (# 11 in FIG. 14). As described above, the raw material supply unit 1 according to the present embodiment slides the connecting portion 13a connecting the plurality of supply ports 13 along the plate surface of the top plate 22, thereby the plurality of supply ports 13 and the plurality of objects to be covered. The connection or non-connection with the supply port 21a1 is configured to be simultaneously switchable.

Next, as shown in FIG. 9, the rectilinear movement drive unit 25 is in a state in which the upper surface of the mounting floor 23, the upper surface of the mold 34b, and the tip surface 33a1 of the second pressing portion 33a of the lower pressing portion 33 are on the same plane. All the five boxes 21 arranged in a straight line by the above move integrally forwardly until the mold 34b is passed (# 12 in FIG. 14). At this time, since the volume of the internal space of the mold 34 b is in a state of zero, the internal space of the mold 34 b is not filled with powder as the box 21 moves forward.

Next, as shown in FIG. 10, while the upper surface of the mounting floor 23 and the upper surface of the mold 34b are maintained on the same plane by the mounting floor lifting drive unit 26 and the mold lifting drive unit 37, the mold 34b, The movable plate 34a and the mounting floor 23 are integrally raised by a predetermined amount (# 13 in FIG. 14). At this time, a volume of one layer is secured in the internal space of the mold 34 b divided by the end surface 33 a 1 of the second pressing portion 33 a of the lower pressing portion 33 and the side wall of the mold 34 b.

Next, the second pressing portion 33a of the lower press portion 33 is slightly vibrated in the vertical direction by the lower press vibrating portion 33c (# 14 in FIG. 14). Then, the five boxes 21 linearly arranged by the linear movement drive unit 25 are integrally moved backward, and the discharge opening 27 of the first box 21 in the movement direction is communicated with the circular opening 34b1 of the mold 34b ( FIG. 14 # 15). At this time, connection is started from the second arc 27b of the discharge opening 27 to the outer periphery of the circular opening 34b1 of the mold 34b (see the upper view of FIG. 10). That is, since both the second arc 27b and the outer periphery of the circular opening 34b1 are curved in a radially convex shape from the center of the circular opening 34b1, the communication area is gradually expanded. As a result, blow-up of powder can be prevented, and bridge formation between powder can be suppressed. Moreover, since the powder is charged while slightly vibrating the second pressing portion 33a of the lower pressing portion 33 in the vertical direction, the bridge between the powder can be broken to increase the packing density. In addition, it is preferable to carry out the filling of the powder from the box 21 to the inner space of the mold 34 b while repeating the backward movement and the forward movement of the box 21.

Next, as shown in FIG. 11, the mold 34b, while the upper surface of the mounting floor 23 and the upper surface of the mold 34b are maintained on the same plane by the mounting floor lifting drive unit 26 and the mold lifting drive unit 37. The movable plate 34a and the mounting floor 23 are integrally raised by a predetermined amount. At this time, in the internal space of the mold 34b partitioned by the upper surface of the first layer powder and the side wall of the mold 34b, a volume for the next one layer is secured.

Next, while the second press portion 33a of the lower press portion 33 is slightly vibrated in the vertical direction by the lower press vibrating portion 33c, the discharge opening 27 of the second box 21 in the moving direction is communicated with the circular opening 34b1 of the mold 34b. Then, the second layer powder is filled in the inner space of the mold 34b. Similarly, after the mold 34b, the movable plate 34a, and the mounting floor 23 are integrally raised by a predetermined amount to secure a volume for the next one layer, powder is transferred from the next box 21 to the internal space of the mold 34b. Repeat the filling operation. In this repetitive operation, the vertical fine vibration of the second pressing portion 33 a of the lower pressing portion 33 is continued. As described above, in the present embodiment, after the discharge opening 27 formed in the first box 21 is communicated with the internal space of the mold 34 b to be filled with the powder, the movement direction of the first box 21 is The discharge opening 27 formed in the second box 21 adjacent on the rear side is communicated with the internal space of the mold 34 b to be filled with powder. Here, “adjacent” is a term which is included in the case where a plurality of boxes 21 are not in contact with each other by providing a space between them in addition to the case where the plurality of boxes 21 are in contact with each other (when adjacent).

Next, as shown in FIG. 12, after the powder for five layers is filled in the internal space of the mold 34b (# 16 YES determination in FIG. 14), the first pressing portion 32a of the upper pressing portion 32 is driven to the upper press The powder is lowered by the portion 32c to press the powder on the tip end surface 32a1 of the first pressing portion 32a (# 17 in FIG. 14). At this time, fine vibration in the vertical direction of the second pressing portion 33a of the lower pressing portion 33 continues until the pressing force of the first pressing portion 32a of the upper pressing portion 32 reaches a predetermined pressing force (FIG. 12) See above). This further breaks the bridge between the powders and can increase the packing density.

Next, when the pressing force of the first pressing portion 32a of the upper pressing portion 32 reaches a predetermined pressing force (# 18 YES determination in FIG. 14), the vertical minute vibration of the second pressing portion 33a of the lower pressing portion 33 is detected. The process is stopped (see the lower part of FIG. 12), and the pressing of the powder by the first pressing part 32a of the upper pressing part 32 is continued (# 19 of FIG. 14). At this time, the lower pressing portion 33 is fixed, and the powder is compressed by the pressing force of the first pressing portion 32 a of the upper pressing portion 32. Therefore, according to the law of action and reaction, The pressing force also acts on the powder from the pressing portion 33a. As a result, control of the pressing force is easier as compared to the case where the lower press portion 33 is made movable, and a compressive force can be applied to the powder in the vertical direction. Then, when the powder is compressed by the first pressing portion 32a of the upper press portion 32, a frictional force is generated between the powder which is in close contact with the mold 34b, and in the powder compression direction (downward) The mold 34b moves naturally. That is, since the second pressing portion 33a of the lower pressing portion 33 moves relative to the mold 34b in the upper direction, the principle is the same as in the case where the second pressing portion 33a of the lower pressing portion 33 is raised. The pressing force of the first pressing portion 32a of the portion 32 and the pressing force of the second pressing portion 33a of the lower pressing portion 33 equally act on the powder. As a result, in the press-formed product, the compressed density of the powder is extremely high, so cracking is unlikely to occur, and an appearance without irregularities can be produced. Then, when the pressing force of the first pressing portion 32a of the upper pressing portion 32 reaches the set pressure (# 20 YES determination in FIG. 14), the series of sequences is ended.

As described above, in the present embodiment, the top plate 22 of the plurality of boxes 21 is provided with the supply ports 21a1 connectable separately to the supply ports 13 of the raw material supply unit 1, and the plurality of boxes 21 are linearly arranged. ing. Therefore, even when the types of powder increase, the box 21 may be added to maintain the linear shape, and a space for disposing the storage tank 11 around the box 21 can be sufficiently secured.

In addition, since the raw material conveyance unit 2 linearly moves the plurality of boxes 21 simultaneously and sequentially fills the powder into the inner space of the mold 34 b from the discharge opening 27 of each box 21, the powder filling is performed once. Complete on move. For this reason, compared with the case where each box 21 is reciprocated separately, molding time can be shortened extremely.

Furthermore, in the present embodiment, connection or non-connection between the plurality of supply ports 13 for supplying the powder from the storage tank 11 and the supply ports 21a1 of the plurality of boxes 21 is configured to be simultaneously switchable. For this reason, it is possible to promptly replenish the powder to the plurality of boxes 21 in which the inner space of the mold 34 b has been filled with the powder, and the molding time can be shortened. In addition, since the supply port 13 and the supply port 21a1 are not connected when the raw material transport unit 2 moves, there is no inconvenience that the powder to be supplied to the other box 21 is accidentally mixed.

Other Embodiments
(1) The raw material is not limited to zirconia powder, and is not particularly limited as long as it is a raw material that needs to be multi-layeredly formed, such as other ceramic powder. In addition, the continuous multilayer molding machine X according to the present embodiment can be used, for example, in the case of multilayer molding of solid materials such as resin powder and food products.

(2) Although the example of 5-layer shaping | molding was shown in embodiment mentioned above, it will not be specifically limited if it is multilayer shaping | molding of two or more layers. Also, the same raw material may be formed in multiple layers.

(3) The second pressing portion 33a of the lower pressing portion 33 may not be vibrated, and the timing of the vibration may be set as appropriate. Further, the second pressing portion 33a of the lower pressing portion 33 may be raised simultaneously with the lowering of the first pressing portion 32a of the upper pressing portion 32, CIP (cold isostatic pressing) or the like may be used. The form is not particularly limited.

(4) The discharge opening 27 formed in the bottom 21c of the box 21 is not limited to the crescent shape, and may have any shape such as a circle or a rectangle. Similarly, the circular opening 34b1 of the mold 34b and the openings of the supply port 13 and the supply port 21a1 may have any shape such as a rectangular shape. Further, the mold 34b is provided with a plurality of circular openings 34b1 (may be rectangular openings etc.) separated from one another, and powder is discharged from the discharge opening 27 formed in the bottom 21c of the box 21 simultaneously into a plurality of circular openings 34b1. You may supply In this case, the shape of the discharge opening 27 is not a crescent shape, and a circular or rectangular opening is preferable. By this, since a plurality of molded articles can be manufactured simultaneously, the manufacturing efficiency can be further enhanced.

(5) In the embodiment described above, after the plurality of boxes 21 are integrally moved forward until all the boxes 21 pass through the mold 34b, the plurality of boxes 21 are integrally moved backward to move the interior space of the mold 34b. The powder was sequentially filled in the Instead of this, the plurality of boxes 21 are integrally moved forward and powder is sequentially filled in the inner space of the mold 34b, and then the molded product is taken out from the mold 34b and the plurality of boxes 21 are integrally moved backward. It may be moved to end a series of sequences.

(6) In the embodiment described above, the plurality of boxes 21 are linearly arranged so as to be adjacent to each other, but a space in which the first pressing portion 32 a of the upper pressing portion 32 can be inserted is made between the plurality of boxes 21. The first press portion 32a may be press-formed each time the powder of one layer is filled in the internal space of the mold 34b.

(7) Instead of the slide moving mechanism 14 which slides the supply port 13, an open / close valve or the like capable of opening and closing the supply port 13 separately may be provided.

INDUSTRIAL APPLICABILITY The present invention is applicable to a continuous multilayer molding machine for multilayer molding of a plurality of raw materials such as powder.

DESCRIPTION OF SYMBOLS 1 Raw material supply part 2 Raw material conveyance part 3 Press molding part 11 Storage tank 13 Supply port 21 Box 21a1 Supply port 21 Bottom part 22 Top plate 27 Discharge opening 27a 1st circular arc part 27b 2nd circular arc part 32a 1st pressing part 33a 2nd Press part 34b mold X continuous multilayer molding machine

Claims

A raw material supply unit having a plurality of storage tanks for storing raw materials, and a plurality of supply ports for separately supplying the raw materials stored in the plurality of storage tanks;
A plurality of boxes including a top plate on which a plurality of supply ports and a supply port connectable to each of the supply ports are formed, and a bottom portion on the opposite side of the top plate to which a discharge opening capable of discharging the raw material is formed. A linearly movable raw material conveying portion having a plurality of the boxes connected in a state of being linearly arranged;
A mold having an internal space into which the raw material is introduced, and a press forming portion having a pressing portion inserted into the internal space to press the raw material,
The raw material conveying portion communicates the discharge opening formed in the first box with the inner space of the mold to be filled with the raw material, and then the rear side of the moving direction with respect to the first box A continuous multilayer molding machine in which the discharge openings formed in the second adjacent boxes are communicated with the inner space of the mold to fill the raw material.
The raw material supply unit has a connecting portion in which a plurality of the supply ports are connected, and the plurality of the supply ports and the plurality of the supply ports are made to slide along the plate surface of the top plate by sliding the connection portion. The continuous multilayer molding machine according to claim 1, wherein connection or non-connection with the supply port is simultaneously switchable.
In the internal space of the mold, a circular opening is formed in plan view,
The discharge opening of the box is formed in a crescent shape having a first arc portion on the outer circumference side and a second arc portion on the inner circumference side having a smaller arc length than the first arc portion,
The continuous multilayer forming machine according to claim 1 or 2, wherein connection with the outer periphery of the circular opening is started from the second circular arc portion along with the linear movement of the raw material transfer portion.
The pressing portion is a movable first pressing portion that can be inserted into the internal space from one side of the mold, and a fixed type that is inserted in a sealed state from the other side of the mold into the internal space And a second pressing portion,
The continuous multilayer forming machine according to any one of claims 1 to 3, wherein when the raw material transfer unit fills the inner space with the raw material, the second pressing unit is vibrated.