JP4110856B2 - Manufacturing method of mold - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for manufacturing a molding die in which a metal powder is irradiated with a light beam to form a bonding layer, and the bonding layer is laminated and integrated to produce a powder bonded body that becomes a desired three-dimensional structure. is there.
[0002]
[Prior art]
Conventionally, a metal powder layer is irradiated with a light beam such as a laser beam and sintered to form a bonded layer in which the metal powder is sintered, and the metal powder layer is coated on the bonded layer. The metal powder is irradiated with a light beam and sintered to form a bond layer integrated with the lower bond layer. By repeating this process, a plurality of bond layers are laminated and integrated. For example, Japanese Patent No. 2620353 and Japanese Patent Application Laid-Open No. 2000-73108 provide a method for producing a powder combination made of a ligation.
[0003]
FIG. 5 shows an example thereof. First, as shown in FIG. 5A, the metal powder 2 is dispensed on the lifting table 1 with a squeegee 3 to a predetermined thickness. The elevating table 1 moves up and down along the side surface of the reference table 4, and the squeegee 3 reciprocates in the horizontal direction at the same level as the upper surface of the reference table 1. Therefore, a layer of the metal powder 2 can be formed on the lifting table 1 with a thickness corresponding to the step Δt between the upper surface of the lifting table 1 and the upper surface of the reference table 4. Thereafter, as shown in FIG. 5B, the light beam L such as a laser beam condensed by the condenser lens 5 is scanned to irradiate only the necessary portion of the layer of the metal powder 2 with the light beam L. Thus, the layer of the metal powder 2 irradiated with the light beam L is sintered to form a bonding layer 6a having a thickness Δt.
[0004]
Next, the elevating table 1 is lowered to the dimension Δt, and the metal powder 2 is supplied onto the bonding layer 6a. As shown in FIG. Is coated on the bonding layer 6a, and then, as shown in FIG. 5 (d), only a necessary portion of the layer of the metal powder 2 is irradiated with the light beam L to be sintered. The bonding layer 6b is laminated together. By repeating such an operation for the required number of layers, a predetermined number of bonding layers 6a to 6f are laminated and integrated as shown in FIG. 5E, and a plurality of bonding layers 6a to 6f are combined as shown in FIG. The powder combination A can be produced as a metal powder sintered body made of
[0005]
Here, as described above, in producing the powder composite A, the product model 10 is converted into the product model 10 shown in FIG. 7 (based on the three-dimensional CAD data when the product model 10 shown in FIG. 7A is designed. As shown in b), the cross-sectional data of the slice surfaces of the respective layers 10a to 10f when horizontally sliced at a predetermined interval Δt are obtained, and the light beam L irradiated to each layer of the metal powder 2 based on the slice cross-sectional data is obtained. By determining the scanning path and forming the bonding layers 6a to 6b with horizontal cross-sectional shapes corresponding to the layers 10a to 10f, the powder combined body A shaped into the same three-dimensional shape as the product model 10 can be produced. it can.
[0006]
In addition, by adopting a construction method in which the bonding layers 6a to 6f are sequentially formed and stacked in this manner, it is not necessary to use a CAM that is three-dimensionally cut according to the shape designed by the three-dimensional CAD. Thus, it becomes possible to produce a three-dimensionally shaped product by repeating two-dimensional processing, and a three-dimensional shaped object can be quickly produced without using a complicated mechanism device. Is.
[0007]
[Problems to be solved by the invention]
As described above, in the powder combination A produced as a three-dimensional structure, when this is used as a molding die, in order to provide functions such as cooling and heating, the powder combination A is provided inside the powder combination A. A path through which the fluid flows is formed. Then, the powder composite A is filled in a dense state in which the metal powder 2 is sintered. When a fluid path is formed in the powder composite A, the powder composite A is formed. Later, it is necessary to perform processing such as cutting and drilling on the powder bonded body A. However, in such processes as cutting and drilling, the shape of the fluid path formed in the powder combined body A is limited to a simple one, and it is possible to freely design and form the fluid path in an optimum shape. It was impossible.
[0008]
Therefore, the present applicant has filed Japanese Patent Application No. 2001-126608 for the purpose of providing a method for producing a three-dimensional structure that can freely form a fluid path in an optimum shape in a powdered binder. . In the invention according to claim 4 of this application, the powder combined body is produced without melt-bonding the powder of the fluid path portion, and the powder of the fluid path is extracted from the powder combined body. In addition to designing and forming the fluid path, the flow resistance of the fluid flowing in the fluid path can be reduced and the flow velocity and flow rate can be increased, and the effect of heat exchange by the fluid is increased. .
[0009]
However, the following problems remain in the invention according to the application. That is, when a powder combination is produced with the fluid path opened to the outside, unbound powder is inadvertently discharged from the fluid path when the powder combination is transported to the next process. It was easy to scatter on the elevating table 1 and its periphery. Further, when a fluid path is formed three-dimensionally inside the metal powder combination, fine hair cracks or cracks are generated on the inner wall surface of the fluid path. Here, if a fluid is circulated in the fluid path, the fluid may ooze out from the hair cracks or cracks and flow out to the outer surface of the powder combination, and molding with a fluid path for mold temperature adjustment It was unsuitable as a metal mold.
[0010]
The present invention was invented in order to solve the above-mentioned problems in the prior art and also to solve the problems in the above-mentioned prior application of the present applicant. The fluid path can be freely formed. At that time, the unsintered metal powder is appropriately discharged and removed, and the flow resistance in the fluid path is reduced, and a flow path path for temperature adjustment is provided. An object of the present invention is to provide a manufacturing method of a molding die that can obtain an optimal three-dimensional structure as a molding die.
[0011]
[Means for Solving the Problems]
According to a first aspect of the present invention, there is provided a method of manufacturing a molding die, wherein a bonding layer is formed by irradiating a predetermined portion of a metal powder layer with a light beam to sinter the metal powder, and the metal powder is formed on the bonding layer. In addition, a bonding layer integrated with the lower bonding layer is formed by irradiating a predetermined portion of the metal powder with a light beam and sintering it, and by repeating this, a plurality of bonding layers are laminated. In producing a powder combined body to be an integrated molding die, a plurality of the bonding layers are laminated and integrated on a metal modeling plate to produce a powder combined body. At that time, a fluid path of the molding die In this case, the unsintered metal powder is left without being irradiated with the light beam, and after the powder combination is produced, an inlet hole and an outlet hole are formed in the modeling plate. Open the fluid path to the outside of the powder combination, and After the metal powders the remaining is characterized by discharging removed from the opened fluid path.
[0012]
Therefore, in this case, the metal powder that does not sinter without irradiating the light beam is left in the portion that becomes the fluid path, and after the powder combination is produced, the remaining metal powder is discharged and removed from the fluid path. By doing so, it is possible to easily form a fluid path that is a cavity, and here, it is possible to freely form the fluid path in an optimum shape.
[0013]
Moreover, when producing a powder combination, a plurality of bonding layers are laminated and integrated on a metal modeling plate to produce a powder combination, and after the powder combination is prepared, an inlet hole and a hole are formed on the modeling plate. An outlet hole is formed to open the fluid path to the outside of the powder combination, and then the remaining metal powder is discharged and removed from the opened fluid path, so that a powder combination is produced. At this stage, the unsintered metal powder is in a state of being hermetically held in the fluid path, and in this state, the powder combination can be transported and transported to prevent inadvertent leakage and scattering of the metal powder. it can.
[0014]
Then, when the drilling process of opening and forming the inlet hole and the outlet hole in the modeling plate is finished, the remaining unsintered metal powder can be appropriately discharged and removed from the opened fluid path. In addition, when a plurality of bonding layers are laminated and integrated on the modeling plate, the modeling plate is in a flat state without an entrance hole and an exit hole, so that the light beam is irradiated with high accuracy and has a predetermined shape. The fluid path is accurately formed.
[0015]
The method for manufacturing a molding die according to claim 2 of the present invention is the method for manufacturing a molding die according to claim 1, wherein the inlet hole and the outlet hole have substantially the same diameter as the fluid path. An opening is formed so as to communicate with both end portions.
[0016]
Therefore, in this case, in particular, the inlet hole and the outlet hole communicating with both ends of the fluid path are formed to have substantially the same diameter as that of the fluid path. The flow resistance of the fluid such as for use can be reduced and the flow velocity and flow rate can be increased, and the effect of heat exchange and the like by the fluid is increased.
[0017]
According to a third aspect of the present invention, there is provided a method of manufacturing a molding die according to the first or second aspect of the invention, in which the compressed fluid is allowed to flow from the inlet hole to remain in the fluid path. The metal powder is discharged and removed from the outlet hole.
[0018]
Therefore, in this case, in particular, since the metal powder remaining in the fluid path is discharged and removed by flowing the compressed fluid, the unsintered metal powder is reliably and smoothly discharged and removed from the fluid path. The metal powder is reliably prevented from remaining in the fluid path.
[0019]
The method for producing a molding die according to claim 4 of the present invention is the method for producing a molding die according to any one of claims 1 to 3, wherein the metal powder is discharged and removed from the fluid path. It is characterized in that a sealing agent flows into the fluid path, and the sealing agent is permeated into the inner wall surface of the fluid path by capillary action to perform the sealing process.
[0020]
Therefore, in this case, in particular, after discharging and removing the metal powder from the fluid path, the sealing agent is introduced into the fluid path, and the sealing agent is permeated into the inner wall surface of the fluid path by capillary action. Since the sealing process is performed, hair cracks and cracks generated on the inner wall surface of the fluid path are reliably filled and sealed. Therefore, in this fluid path, exudation of fluid for mold temperature adjustment and the like can be prevented, the flow resistance of the fluid can be reduced, and the flow velocity and flow rate can be increased. The effect is increased.
[0021]
DETAILED DESCRIPTION OF THE INVENTION
1, 2 and 4 show an embodiment corresponding to all claims 1 to 4 of the present invention. In the manufacturing method of the molding die of this embodiment, the powder combined body A can be produced by using the metal powder 2 and irradiating a light beam L such as a laser beam as shown in FIGS. it can.
[0022]
That is, the metal powder 2 is irradiated with the light beam L to sinter the metal powder 2 to form a bonded layer 6a in which the metal powder 2 is sintered and bonded, and a metal layer is formed on the bonded layer 6a. By covering the powder 2 layer and irradiating the metal powder 2 with the light beam L and sintering it, a bonding layer 6b integrated with the lower bonding layer 6a is formed, and by repeating this, a plurality of Can be produced. The powder bonded body A is made of a metal powder sintered body in which the bonding layers 6a, 6b, 6c.
[0023]
Here, as the metal powder 2, for example, iron powder having an average particle diameter of about 20 to 30 μm, other iron-based powder materials, or a mixed powder material of bronze and nickel can be used, and each of the bonding layers 6a, 6b, 6c... Can be formed with a thickness Δt of about 0.02 to 0.2 mm. As shown in FIG. 5, a predetermined number of bonding layers 6a to 6f are sequentially laminated and integrated, and as shown in FIG. 6, a powder combination A is formed as a metal powder sintered body composed of a plurality of bonding layers 6a to 6f. Since the specific contents to be manufactured are the same as described above, the specific description is omitted here.
[0024]
As described above, when the powder combination A is manufactured, based on the three-dimensional CAD data when designing the product model 10 as shown in FIG. ), The slice data of the slice surfaces of the respective layers 10a to 10f when horizontally sliced at a predetermined interval Δt is obtained, and the light beam L irradiated to each layer of the metal powder 2 based on the slice cross-sectional data is obtained. By determining the scanning path and forming the bonding layers 6a to 6b with horizontal cross-sectional shapes corresponding to the layers 10a to 10f, the powder combined body A shaped into the same three-dimensional shape as the product model 10 can be produced. it can.
[0025]
In this case, the cross-sectional data of the product model 10 and each of the layers 10a to 10f is obtained by subtracting a portion corresponding to the fluid path 8 from the whole, and the powder combined body A having the fluid path 8 is produced. In addition, by adopting a construction method in which the bonding layers 6a to 6f are sequentially formed and stacked in this manner, it is not necessary to use a CAM that is three-dimensionally cut according to the shape designed by the three-dimensional CAD. Thus, it becomes possible to produce a three-dimensionally shaped product by repeating two-dimensional processing, and a three-dimensional shaped object can be quickly produced without using a complicated mechanism device. Is.
[0026]
By the way, since the light beam L is not irradiated to the portion that becomes the fluid path 8, in the powder combined body A, the metal powder 2 that is not sintered in the fluid path 8 is formed in the fluid path 8 as shown in FIG. Will remain. Further, here, the above-mentioned bonding layers 6a to 6b (bonding layer portion 6) obtained by sintering the metal powder 2 on the modeling plate 7 made of metal are laminated and integrated to produce a powder bonded body A. At this time, the light beam L is not irradiated to the portion that becomes the fluid path 8, and therefore, the unsintered metal powder 2 is sealed in the fluid path 8 of the powder combination A. It will be retained.
[0027]
In this case, the metal powder 2 is made of an iron-based powder material, the modeling plate 7 is formed of the same type of iron-based plate material, and the sintered bonding layer portion 6 is firmly bonded and fixed to the modeling plate 7. Is done. In this state, the unsintered metal powder 2 is in a state of being hermetically held in the fluid path 8, and the powder combination A is transported and conveyed in this state, so that the metal powder 2 is inadvertently prepared. Leakage and scattering can be prevented, and the lifting table 1 shown in FIG.
[0028]
Therefore, as shown in FIG. 1B, an inlet hole 9a and an outlet hole 9b communicating with the fluid path 8 are formed in the portion of the modeling plate 7, and the fluid path 8 is formed outside the powder combined body A. Is to be opened. In this case, as shown in FIG. 2, the inlet hole 9a and the outlet hole 9b are coaxially connected to the fluid path 8, and have substantially the same diameter so as to communicate with both ends of the fluid path 8. Then, it is drilled in the modeling plate 7. At this time, the modeling plate 7 is drilled and cut with a drill or the like, but the operation is easy only by cutting to a depth corresponding to the thickness of the modeling plate 7.
[0029]
Here, as shown in FIG. 3, if the modeling plate 7 is pre-pierced with the inlet hole 9a and the outlet hole 9b corresponding to the fluid path 8, the following problems occur. It is. That is, as shown in FIG. 3 (a), if the modeling plate 7 is preliminarily provided with the inlet hole 9a and the outlet hole 9b, generally, at the rim portion of the inlet hole 9a and the outlet hole 9b. Is chamfered 12, and therefore, the bonding layer portion 6 laminated and integrated on the chamfer 12 interferes with sintering in the chamfer 12, particularly at both end portions of the fluid path 8. It cannot be formed with high accuracy.
[0030]
Further, as shown in FIG. 3 (b), even when the chamfer 12 is not provided at the edge portions of the inlet hole 9a and the outlet hole 9b, the modeling plate 7 is set off from a predetermined position. The light beam L is irradiated to a position shifted from the inlet hole 9a or the outlet hole 9b, and the fluid path 8 is formed larger than a predetermined diameter. In any case, if the hole 9a and the outlet hole 9b are previously formed in the modeling plate 7, it is difficult to cover the layer of the metal powder 2 on the hole 9a. In other words, the metal powder 2 may fall, and the fluid path 8 having a predetermined shape is not accurately formed.
[0031]
On the other hand, as shown in FIG. 2, after the powder combined body A is produced, when the inlet hole 9 a and the outlet hole 9 b are formed in the modeling plate 7, the bonding layer portion is formed on the modeling plate 7. 6 is laminated and integrated, the modeling plate 7 is in a flat state without the inlet hole 9a and the outlet hole 9b, so that the layer of the metal powder 2 can be easily and reliably coated thereon. Thus, the light beam L is also irradiated with high accuracy, and the fluid path 8 having a predetermined shape is accurately formed.
[0032]
Then, as shown in FIG. 1C, the remaining unsintered metal powder 2 is discharged and removed from the fluid path 8 opened as described above. In this case, a compressed fluid 11 such as compressed air or a compressed liquid is introduced from the inlet hole 9a, and the metal powder 2 remaining in the fluid path 8 is forcibly discharged and removed from the outlet hole 9b. Here, it is possible to suck and remove the metal powder 2 from the fluid path 8 by sucking from the outlet hole 9b with a suction machine or the like, but in this case, it becomes difficult to process the metal powder 2 after being sucked. It is preferable to extrude with the compressed fluid 11 as described above.
[0033]
Further, after the metal powder 2 is discharged and removed from the fluid path 8 as described above, as shown in FIG. 4, the sealing agent 13 flows into the fluid path 8, and this sealing agent 13 is removed from the fluid path 8. The sealing is performed by infiltrating the inner wall surface of the path 8. In this case, as shown in FIG. 4 (a), the powder combined body A is placed on the table 15 so that the inlet hole 9a and the outlet hole 9b at the both ends of the fluid path 8 are opened upward, As shown in FIG. 4B, the sealing agent 13 is poured into the fluid path 8 from either the inlet hole 9 a or the outlet hole 9 b, and the sealing agent 13 is approximately put into the fluid path 8. As a full state, leave this state for a while (about 5 minutes).
[0034]
At this time, the inlet hole 9a and the outlet hole 9b may be covered so that the sealing agent 13 does not flow out of the fluid path 8. Here, the sealing agent 13 permeates the inner wall surface of the fluid path 8 due to the capillary phenomenon of the liquid, and soaks into the hair cracks and cracks 14 in the powder sintered body of the powder bonded body A, which is surely confirmed. It is buried and sealed. In this case, the sealing agent 13 is a liquid that has a low viscosity and can permeate and seal even fine pores that are invisible due to the capillarity of the liquid, for example, the viscosity of the liquid is 20 ° C. 0.35CP (12DINsek), fine pores with a liquid permeability of 0.1mm or less, and 1 / 100mm gaps with 50mm in 3 minutes can be used.
[0035]
Here, depending on the size of hair cracks, cracks 14 and the like, the sealing action is increased by changing the particle diameter of the sealing agent 13. For example, in the case of a crack of about 0.5 mm, the inner wall surface of the fluid path 8 is surely sealed when the small particle sealing agent 13 is used after the large particle sealing agent 13 is used first. Is. Further, the sealing agent 13 is filled in the fluid path 8 and left for several minutes (about 5 minutes), and then is temporarily discharged from the fluid path 8, and a new sealing agent 13 is again placed in the fluid path 8. By pouring and repeating this several times, the sealing action is further increased.
[0036]
In addition, when using the sealing agent 13 having low viscosity and high permeability, the entire powder bonded body A is immersed in the tank in which the sealing agent 13 is stored, or the same sealing agent is used. Even if 13 is applied several times to a location such as a hair crack or crack 14, the sealing treatment is applied. However, since it is efficient and effective that the sealing process is performed only on the inner wall surface of the fluid path 8 and it is difficult to insert a brush into the fluid path 8, as described above. A method of sealing treatment in which the treatment agent 13 flows into the fluid path 8 and permeates into the inner wall surface thereof is preferable.
[0037]
Finally, the excess portion of the sealing agent 13 is completely discharged from the fluid path 8, and the powder combined body A is left at room temperature or in a heated state for several hours. In this case, as shown in FIG. 4 (c), the powder combined body A is reversed so that the inlet hole 9a and the outlet hole 9b at both ends of the fluid path 8 are opened downward. What is necessary is just to let the excess part of the processing agent 13 flow out from the fluid path | route 8, and to leave in this inversion state. Thereby, the sealing agent 13 provided for sealing in the fluid path 8 is completely cured, and the sealing process on the inner wall surface of the fluid path 8 is completed. On the inner wall surface of the fluid path 8 subjected to the sealing treatment, not only hair cracks and cracks 14 are reliably sealed, but the inner wall surface is smooth, and the fluid flow resistance there is also reduced. The fluid path 8 is optimal for circulating a fluid for cooling or heating.
[0038]
Therefore, in the manufacturing method of the molding die of this embodiment, the metal powder 2 that does not sinter without irradiating the light beam L is left in the portion that becomes the fluid path 8, and the powder combination A is manufactured. After that, the remaining metal powder 2 is discharged and removed from the fluid path 8 so that the fluid path 8 can be easily formed. In this case, even if the fluid path 8 has a complicated and long shape, the remaining metal powder 2 can be easily discharged and removed from the fluid path 8, and the fluid path 8 can be freely formed in an optimum shape. be able to.
[0039]
Moreover, when the powder combination A is produced, a plurality of bonding layers 6a, 6b, 6c,... Are laminated and integrated on the metal forming plate 7, and the powder combination A is produced. After that, an inlet hole 9a and an outlet hole 9b are formed in the shaping plate 7 to open the fluid path 8 to the outside of the powder combined body A. Thereafter, the remaining metal powder 2 is added to the molding plate 7 Since it is discharged and removed from the opened fluid path 8, the unsintered metal powder 2 is in a state of being hermetically held in the fluid path 8 at the stage where the powder bonded body A is manufactured. By transferring and transporting the body A, inadvertent leakage and scattering of the metal powder 2 can be prevented.
[0040]
Then, when the drilling process for forming the inlet hole 9a and the outlet hole 9b in the modeling plate 7 is finished, the remaining unsintered metal powder 2 is appropriately discharged and removed from the opened fluid path 8. Is something that can be done. When the plurality of bonding layers 6a, 6b, 6c,... Are laminated and integrated on the modeling plate 7, the modeling plate 7 is a flat surface in which the opening 9a for the entrance and the opening 9b for the exit are not formed. Since it is in the state, it is easy to coat the layer of the metal powder 2 on it, and the light beam L is also irradiated with high precision, and the powder combination A having the fluid path 8 having a predetermined shape is accurately laminated.
[0041]
Further, in the manufacturing method of the molding die of this embodiment, the inlet hole 9a and the outlet hole 9b communicating with both ends of the fluid path 8 are formed in the modeling plate 7 so as to have substantially the same diameter as the fluid path 8. Therefore, the flow resistance of the fluid for adjusting the mold temperature and the like flowing through the fluid path 8 can be reduced, and the flow velocity and flow rate can be increased, and the effect of heat exchange by the fluid is increased. . Further, since the metal powder 2 remaining in the fluid path 8 is discharged and removed by flowing the compressed fluid 11, the unsintered metal powder 2 is discharged and removed from the fluid path 8 reliably and smoothly. The residual metal powder 2 in the fluid path 8 is reliably prevented.
[0042]
Furthermore, in the manufacturing method of the molding die of this embodiment, after discharging and removing the metal powder 2 from the fluid path 8, the sealing agent 13 flows into the fluid path 8, and the sealing agent 13 is removed. Since the inner wall surface of the fluid path 8 is permeated by capillarity to perform sealing treatment, hair cracks and cracks 14 generated on the inner wall surface of the fluid path 8 are reliably filled and sealed. Therefore, in this fluid path 8, the fluid for mold temperature adjustment or the like can be prevented from seeping out, the flow resistance of the fluid can be reduced, and the flow velocity or flow rate can be increased. The effect is increased.
[0043]
【The invention's effect】
As described above, in the method of manufacturing a molding die according to claim 1 of the present invention, the fluid path can be easily formed in an optimal shape, and at the stage where the powder combination is produced, The sintered metal powder is hermetically held in the fluid path and easy to handle, and when the drilling process is completed, the remaining metal powder can be appropriately discharged and removed from the opened fluid path. Further, when a plurality of bonding layers are laminated and integrated on the modeling plate, the modeling plate is in a flat state, and a powder combination having a fluid path of a predetermined shape is accurately formed thereon.
[0044]
Further, in the method for manufacturing a molding die according to claim 2 of the present invention, in particular, the die in which the fluid path, the inlet hole and the outlet hole are communicated with each other with substantially the same diameter and are circulated in the fluid path. The flow resistance of the fluid for temperature adjustment or the like becomes smaller, and the flow velocity or flow rate can be increased, and the effect of heat exchange or the like by the fluid is increased.
[0045]
In the method for manufacturing a molding die according to claim 3 of the present invention, in particular, when the compressed fluid is introduced, the unsintered metal powder remaining in the fluid path is reliably and smoothly discharged and removed. The metal powder is reliably prevented from remaining in the fluid path.
[0046]
Further, in the method for manufacturing a molding die according to claim 4 of the present invention, in particular, hair cracks and cracks are reliably sealed by the sealing treatment, and fluid stains for adjusting the mold temperature in the fluid path are obtained. Outflow is prevented, the flow resistance of the fluid becomes smaller, and the flow velocity and flow rate can be increased, and the effect of heat exchange and the like by the fluid is increased.
[Brief description of the drawings]
1A is a cross-sectional view showing a state in which metal powder remains and is sealed in a fluid path, and FIG. 1B is a cross-sectional view through the fluid path. Sectional drawing which shows the open state, (c) is sectional drawing which shows the state which discharges and removes the said remaining metal powder from the fluid path | route.
FIG. 2 is a cross-sectional view of a main part showing a state where a fluid path is opened through in the manufacturing method of the molding die according to the embodiment;
FIGS. 3A and 3B are cross-sectional views of the main part of each of the fluid paths in which a drilling process is performed on the modeling plate by a method different from the present invention. FIG.
4A is a cross-sectional view showing a state in which a fluid path is opened through; FIG. 4B is a cross-sectional view showing a state in which a sealing agent flows into and penetrates the fluid path; Sectional drawing which shows the state which exists, (c) is sectional drawing which shows the state which discharged and removed the sealing agent from the fluid path | route.
FIGS. 5A to 5E are cross-sectional views showing respective steps of manufacturing a powder bonded body, wherein FIGS.
FIG. 6 is a perspective view showing a powder bonded body obtained by the production described above.
7A is a perspective view showing a designed product model used for manufacturing the same as above, and FIG. 7B is a perspective view showing each layer sliced from the product model.
[Explanation of symbols]
2 Metal powder
6 Bonding layer
6a, 6b, 6c ... tie layer
7 Modeling plate
8 Fluid path
9a Inlet hole
9b Outlet hole
11 Compressed fluid
A powder combination
L Light beam

Claims (4)

A predetermined portion of the metal powder layer is irradiated with a light beam to form a bonding layer in which the metal powder is sintered. The metal powder layer is coated on the bonding layer and the light beam is applied to the predetermined portion of the metal powder. Forming a bonding layer that is integrated with the lower bonding layer by irradiation and sintering, and by repeating this process, a powder bonded body that becomes a molding die in which a plurality of bonding layers are laminated and integrated is produced. The powder bonding body is produced by laminating and integrating the plurality of bonding layers on the metal modeling plate. At this time, the green metal is not irradiated onto the portion that becomes the fluid path of the molding die. The powder is left to remain, and after the powder combined body is produced, an inlet hole and an outlet hole are formed in the modeling plate to open a fluid path to the outside of the powder combined body. Fluid that was opened up the remaining metal powder Method for manufacturing a forming mold, characterized in that the exhaust removal from the road. 2. The method for producing a molding die according to claim 1, wherein the inlet hole and the outlet hole have substantially the same diameter as that of the fluid path, and the openings are formed so as to communicate with both ends of the fluid path. 3. The method for producing a molding die according to claim 1, wherein the metal powder remaining in the fluid path is discharged and removed from the outlet hole by flowing a compressed fluid from the inlet hole. After discharging and removing the metal powder from the fluid path, the sealing agent flows into the fluid path, and the sealing agent is permeated into the inner wall surface of the fluid path by capillary action to perform the sealing process. The manufacturing method of the shaping die as described in any one of Claims 1-3 characterized by the above-mentioned.

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