JPH08134505A - Production of precision parts by powder curing - Google Patents

Abstract

PURPOSE: To produce sintered parts by using all kinds of metals and/or ceramic powder. CONSTITUTION: Raw material powder 1 formed by mixing thermosetting type water soluble adhesives with all kinds of blank powders including hardly machinable materials, such as stainless steel, titanium and ceramics, is subjected to isostatic molding in accordance with the pressurization with compressed air by a silicone rubber mold 13 disposed in a hermetic box 5, by which a block-shaped powder molding is formed. The solvent of the adhesives of this block-shaped powder molding is evaporated, by which a powder solidified blank block is formed. This powder solidified blank block is machined by a three- dimensional working machine in accordance with the CAD design data, etc., to form powder solidified precision parts and, thereafter, these parts are heated to the curing temp. of the adhesives to cure the adhesives, by which the powder cured precision parts are obtd. As a result, precision parts, such as molds for molding synthetic resins having excellent accuracy and durability, are produced at a low cost in a short period of time by utilizing metals and/or ceramic materials of all kinds including the materials with which machining is not possible.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a component from a raw material powder consisting of metal or ceramic powder or a mixed powder of metal and ceramic, and more particularly to a mold for molding synthetic resin obtained by curing the raw material powder. Alternatively, the present invention relates to a method for manufacturing a precision component such as a jig.

[0002]

2. Description of the Related Art Conventionally, complicated and precise parts such as synthetic resin molding dies or jigs have been manufactured by machining a block-shaped material.

However, in order to machine a material block in this way to manufacture a precision part, only a material having good machinability can be used as a material, and a metal such as stainless steel, tungsten, titanium, cemented carbide, or a cutting work such as ceramics. It was not possible to manufacture precision parts from difficult materials.

Conventionally, in order to manufacture a component from such a material that is difficult to cut, a raw material powder for shaping a component such as a metal or ceramic powder and a mixed powder of metal and ceramic is formed as a raw material powder. A sintering method in which this molded body is sintered into parts is widely used.

A method for producing a powder sintered product is as follows. First, a raw material powder filled in a mold is press-molded at a high pressure to form a green compact, and then the green compact is placed in a sintering furnace. A method of shaping by using so-called powder compaction has been used in which a powder sintered product is obtained by heating at a predetermined temperature and sintering.

However, in the case of molding by powder compacting, the molding directions are two directions, so the shape of the product that can be molded is limited, and only a product with an extremely simple shape can be manufactured. Of course, the powder compact can be machined. Since it does not have sufficient strength and it is difficult to machine the sintered product because it has poor machinability, it is necessary to manufacture a mold or jig for molding with a precise and complicated shape. I couldn't.

Further, in recent years, as a technique for obtaining a sintered product of metal and / or ceramic powder, a raw material powder is prepared by blending a material fine powder having a particle size of about 10 μm or less with a thermoplastic binder such as thermoplastic synthetic resin or wax. , This raw material powder is molded by injection molding in the same manner as molding of thermoplastic synthetic resin,
Next, this injection molded article is heated to melt the binder,
A so-called MIM method, which is a metal powder injection molding method, has been developed.

According to the MIM method, the raw material powder is molded by injection molding. Therefore, unlike the case of the powder compaction, it is possible to accurately and easily mold a product having any complicated shape. .

[0009]

However, even if the MIM method as described above is used, there are many problems in producing a precision powder sintered product, such as accuracy and cost of the product.

In order to injection mold the raw material powder with the thermoplastic binder by the MIM method, in order to improve the fluidity at the time of molding, the blending amount of this thermoplastic binder is about 10% by weight with respect to the raw material powder, and the volume is It is necessary to mix in a large amount of 50% or more, and since this large amount of thermoplastic binder is removed from the molded product by degreasing before sintering, various defects such as deformation, shrinkage, warpage, cracks, cavities, etc. It is easy to occur.

For this reason, it is possible to prevent the above-mentioned defects from occurring even if a slight modification is made in the design of the molding die, or degreasing takes a very long time of about 100 hours. Although trying, it is extremely difficult to completely prevent the above defects.

Attempts have also been made to machine a sintered product, that is, a silver body, to correct defects and finish it into a precise product, but there were various problems, and it was practically impossible.

That is, since the silver body is already in the shape of a product, there is no chuck part to be attached to the machine, it is difficult to make a reference surface for processing, and it is more likely that it is made of stainless steel, tungsten, titanium or carbide. This is because materials such as various metals and ceramics are difficult to cut and cannot be machined at all.

Further, since it is difficult to machine silver bodies as described above, it is possible to machine the injection-molded products, that is, the green body or the degreased products, that is, the brown body.

Since the green body contains a large amount of the thermoplastic binder as described above, the machined surface is peeled off during machining, and precision processing cannot be performed. Further, as described above, during degreasing. Since it will be further deformed, it is not possible to perform precision processing such as defining the surface shape in addition to mere drilling, and brown body has extremely weak strength because the binder has been removed by degreasing It cannot be processed.

Therefore, it is very difficult to manufacture a part having a complicated shape such as a molding die or a jig by the MIM method and a true precision is required. Particularly, when the raw material powder is stainless steel, tungsten, titanium, In the case of difficult-to-cut materials such as metal such as cemented carbide and ceramics, it has been impossible to manufacture a molding die or jig.

Further, in the case of the MIM method, an extremely precisely processed expensive die must be used for forming the raw material powder, and a part to be produced such as a forming die or a jig is required. In the case of a single product or high-mix low-volume production, the cost of the product becomes very high due to the die cost.

Further, since the MIM method is also a sintering method, a large amount of fuel consumption is required for degreasing a powder molded article and thereafter sintering, which also increases the manufacturing cost.

The present invention overcomes the above-mentioned drawbacks of the prior art and makes it extremely easy and inexpensive to use tungsten,
It is an object of the present invention to facilitate the production of precision parts such as molding dies or jigs with all powders including difficult-to-cut materials such as titanium, cemented carbide, and ceramics.

[0020]

That is, according to the present invention, a step of forming a raw material powder in which a thermosetting water-soluble adhesive is mixed with a raw material powder made of metal and / or ceramic powder, and the raw material powder is pressure-molded A step of forming a powder compact in the form of a material, and a step of solidifying the powder compact in the form of a powder by an adhesive solvent evaporation process that evaporates the solvent of the adhesive to form a powder solidified material; It consists of the steps of machining precision parts such as molds or jigs to form powder-solidified precision-machined parts, and heating the powder-solidified precision-machined parts to a curing temperature to form powder-hardened precision parts. In the first claim, in the first claim, the sinterable powder is a fine powder having an average particle size of 30 μm or less, and in the second claim, the heat in the first and second claims is Cure A method for producing precision parts by powder cured to a third aspect the amount of the powder adhesive is 5 to 20 volume% relative to the raw material powder.

[0021]

The present invention is constructed as described above. First, metal or ceramic as a raw material is used as a powder, and the powders are bonded to each other with a thermosetting water-soluble adhesive to be hardened to form a component. Therefore, it is possible to freely select and use a material having characteristics required for a precision component such as a molding die or a jig to be manufactured.

That is, since the raw material is powder,
It can be used as a simple powder of metal or ceramics, and of course, metal or ceramics or even mixed powders of metal and ceramics can be freely used. It is possible to select a powder that has the optimum characteristics for precision parts such as jigs and use this as the raw material powder.

In addition, the raw material powder for forming the precision parts is to obtain a molded body in which the powder particles are bonded with a certain degree of strength so that they can be handled in the sintering furnace as in the case of the conventional sintering method. Since it is not necessary to mold at high pressure, it is sufficient to bond the powders with each other by the bonding force of the film formed when the solvent of the water-soluble adhesive is evaporated to form a molded body.
For molding, the raw material powder can be molded at a low pressure sufficient to mold it into a block shape following a mold.

For this reason, the molding apparatus becomes simple, and the mold can also be a simple mold such as a low melting point alloy casting mold, a metal powder-containing resin mold, and a silicone rubber mold, which can be manufactured in a short time and at low cost. Like

Since pressure molding is used as a method for molding the raw material powder, the water-soluble adhesive is added to the raw material powder in the same manner as in the MIM method in which injection molding is performed by utilizing the fluidity of the binder. It is not necessary to mix in a large amount, and the film formed by evaporation and drying of the solvent binds the powders to each other with moderate strength to form a powder solidified material. It only needs to be added in an amount suitable for forming.

As a result, there is no hindrance to the attachment to the processing machine, and further, the machined surface does not collapse due to insufficient strength during machining, and the adhesive is fused and peeled off the tool. It is possible to obtain a powder solidified material having a strength that allows smooth cutting without roughening the surface, that is, a strength suitable for machining.

As described above, a powder-solidified material having a strength suitable for machining can be obtained. Therefore, based on CAD design data using this material, or a model of a precision component to be manufactured is measured by a three-dimensional measuring instrument. The powder solidified precision parts can be easily obtained by processing with a three-dimensional processing machine based on the three-dimensional processing data created based on the data measured in.

The powder-solidified precision parts obtained in this manner are in an uncured state while adjusting the compounding amount of the adhesive so that they can be easily machined. Although it is not strong enough to be used as a precision part like this, if this thermosetting adhesive is in an uncured state, the powder solidified precision part is heated and the adhesive is heat-cured to obtain appropriate strength. It becomes a powder hardening precision part.

In producing the powder-hardened precision parts as described above, if the raw material powder is a fine powder having an average particle size of 30 μm or less, a high-density part having a smooth surface can be obtained.

If the amount of the adhesive compounded is too small, the strength of the powder solidified material formed by the bonding force of the film formed when the solvent of the adhesive is evaporated is too weak, and the mechanical processing is facilitated. It cannot be done, and powder-cured precision parts with strong strength cannot be obtained even if they are cured at the same time.

On the other hand, if the amount of the adhesive compounded is too large, the strength of the powder-solidified material becomes too strong, making it difficult to machine, and at the same time, as in the case of the MIM method, the adhesive is fused to the tool. However, the machined surface becomes rough and the machinability deteriorates.

On the other hand, when the compounding amount of the adhesive is 5 to 20% by volume with respect to the raw material powder, the film formed when the solvent of the adhesive evaporates exerts an appropriate bonding force to the powders. Then, when a powder solidified material suitable for machining is formed and simultaneously cured, it becomes possible to form a powder-hardened precision component having an appropriate strength, which is advantageous.

At this time, since the adhesive uses water as a solvent, which is water-soluble and does not easily evaporate, the adhesive is mixed with the raw material powder to form the raw material powder, or the raw material powder is stored before molding. The solvent does not evaporate during the operation.

Therefore, the adhesive can be mixed with the raw material powder for a sufficient time without worrying about evaporation of the solvent, so that a raw material powder uniformly mixed with the raw material powder can be obtained even if the amount of the adhesive compounded is small, When such a raw material powder is used, there is no concern about the pot life, so that molding is easy, and at the same time, a powder solidified material having uniform strength and a powder curing precision mechanical component can be formed.

[0035]

Embodiments of the present invention will now be described with reference to the drawings.

The method for producing the powder-hardened precision component of the present invention is as shown in the production process table of FIG. 1. First, the raw material powder for producing the precision component and the thermosetting water-soluble adhesive are prepared.

The raw material powder is made of stainless steel, titanium, or titanium for manufacturing precision parts such as molds or jigs for molding synthetic resin.
Metals such as tungsten, alumina, zirconia, ceramics such as silicon nitride that cannot be used for conventional cutting, or materials used for conventional cutting such as iron, aluminum and copper However, fine powder of 30 microns or less, which is a material having characteristics suitable for precision parts to be manufactured, is used.

The thermosetting water-soluble adhesive used in the present invention is a thermosetting water-soluble adhesive which can be diluted with an aqueous solvent such as water or a mixed solvent of water and an organic solvent soluble in water such as alcohols and glycol ethers. Adhesives that use a resin of a mold as a vehicle, such as a water-soluble adhesive based on a so-called thermosetting water-soluble resin that dissolves in an aqueous solvent, and an aqueous emulsion based on a thermosetting resin emulsion. There is.

This water-soluble adhesive is a so-called water-soluble adhesive such as an alkyd resin, an acrylic resin, an amino resin, etc. in which a carboxyl group is introduced into a polymer and the carboxyl group is neutralized with ammonia or amine so that it can be dissolved in an aqueous solvent. There are thermosetting aminoalkyd and aminoacrylic water-soluble adhesives formed on the basis of a thermosetting resin, and emulsion adhesives based on a thermosetting acrylic resin emulsion by emulsion polymerization.

The curing temperature of the thermosetting water-soluble adhesive will vary depending on the properties of the resin that serves as the vehicle. If the curing temperature is too high, the curing process will not be easy, and if the curing temperature is low, the strength of the cured product will be low. In addition to falling, the raw material powder hardens and becomes unmoldable when stored in a high temperature place, or hardens when heated to evaporate the solvent from the molded body, resulting in poor machinability. In the present invention, it is preferable to use an adhesive having a curing temperature of about 150 to 180 ° C.

Regarding the concentration of the adhesive, the more the amount of the solvent is, the easier it is to uniformly mix with the raw material powder, but it becomes difficult to evaporate and dry the solvent from the molded body, and the concentration of the adhesive in the raw material powder is also considered. Since it must be present, it is preferably about 10% by weight.

In the first step, the raw material powder 1 is first formed by mixing the raw material powder and the adhesive in the following formulation example. Formulation Example 1 Material powder Average particle size 8 micron SUS316L powder 100 parts by weight Water-soluble adhesive Amino alkyd 10% by weight aqueous solution 20 〃 Formulation example 2 Material powder Average particle size 15 μm Titanium powder 100 parts by weight Water-soluble adhesive Aminoacrylic 10 Wt% Aqueous solution 15 〃 Mixing example 3 Material powder Average particle size 1 micron Zirconia powder 100 parts by weight Water-soluble adhesive Acrylic 10 wt% Emulsion 25 〃

With such a composition, the raw material powder and the solution of the adhesive are mixed according to a conventional method. In this case, since the solvent is an aqueous system, there is no fear of evaporation during the mixing operation, so it takes a sufficient time. As a result, a raw material powder in which the adhesive is mixed well with the raw material powder is obtained.

In forming such a raw material powder, the particle size of the raw material powder and the blending amount of the adhesive in the raw material powder are set so that the powder solidified material maintains the required strength and is excellent in machinability, It is necessary to consider to obtain precision parts with the strength of.

The particle diameter of the raw material powder directly affects the density of the powder-hardened parts to be formed, and the fine powder of the raw material powder is required to increase the density in order to make precision parts such as molds or jigs for molding synthetic resin. The average particle size is preferably 30 microns or less.

If the amount of the adhesive compounded is small, it is natural that the powders cannot be strongly bonded to each other when the solidified film is formed by evaporating the solvent and when the hardened film is further formed by curing. In addition to the fact that a powder-solidified material having a strength suitable for the above cannot be obtained, the powder-solidified precision component also does not have sufficient strength.

On the other hand, if the amount of the adhesive compounded is too large, the binding force between the powders when the solvent is evaporated to form a solidified film becomes strong, and the strength of the powder solidified material is too strong to process easily, and at the same time, the binder is mixed. As in the case of the MIM method, which has a large amount, the adhesive agent is fused to the processing tool and peels off to roughen the processed surface, resulting in poor machinability.

Taking this into consideration, the amount of the adhesive compounded is 20 in terms of volume with respect to the raw material powder in view of machinability.
% Or less, on the other hand, from the strength of the powder solidified material and the powder-hardened precision parts, it is preferably 5% or more by volume with respect to the material powder.
It is about 4%.

Raw material powder 1 formed as described above
Is a powder that is slightly moistened with an aqueous solvent, and since the solvent does not evaporate easily, it does not solidify even if stored for a relatively long time before molding, and is easy to handle. Is.

In the second step, the raw material powder 1 formed as described above is filled in a mold having a block-shaped cavity, and in the third step, it is molded by press molding such as press molding or hydrostatic molding to form a block-like powder. The molded body 2 is formed.

That is, the raw material powder 1 is cold-pressed at a pressure of 1 to 2 ton / cm 2 by a floating-type die composed of upper and lower punches and a die, or compressed at a pressure of about 5 kg / cm 2. Isostatic molding with air.

The block-shaped powder compact 2 formed by such pressure molding is subjected to an adhesive solvent evaporation treatment in which the solvent is removed by evaporation to solidify the adhesive in the next fourth step.

This adhesive solvent evaporation treatment is carried out at a temperature much lower than the curing temperature of 80 to 100 ° C. so as not to cure the adhesive. At this time, if the vacuum degree is about 50 to 100 torr, the evaporation of the solvent is low. However, it is faster, which is preferable.

When the block-shaped powder compact 2 is subjected to the solvent evaporation treatment under the above-mentioned conditions for about 1 hour, the adhesive evaporates the solvent to form a solidified film for binding the powders to each other, whereby the powder solidified material block 3 is formed. Is obtained.

The powder solidified material block 3 for machining precision parts is manufactured by the manufacturing process as described above. When the powder solidified material manufacturing apparatus 4 is used as shown in FIGS. It is convenient that the hydrostatic molding of the powder 1 and the formation of the powder solidified material block 3 by the adhesive solvent evaporation treatment of the molded body 2 can be performed by one device.

Reference numeral 5 denotes an upper lid 6 for opening and closing the upper opening.
And a compressed air pipe 7 and a vacuum exhaust pipe 8 connected to a compressor and a vacuum pump (not shown) are provided on the side surface of the closed box 5.

A vibration generator 9 is provided on the bottom surface of the closed box 5. The vibration generator 9 is a vibration generator 12.
The diaphragm 10 is attached to the back surface of the closed box 1 and is supported by an elastic support 11 that stands vertically on the bottom surface of the closed box 1. Further, a heating frame 15 in which a heater 16 is embedded is provided on the diaphragm 10. Is posted.

In order to form the powder solidified material block 3 using the powder solidified material manufacturing apparatus 4 configured as described above, first, as shown in FIG. 2, the upper lid 6 of the closed box 5 is opened to form a block shape. The mold 13 having the cavity 14 formed therein is housed in the heating frame 15 and installed on the vibrating plate 10. Subsequently, the raw material powder supply cylinder 17 is set on the mold 13 so that the raw material powder 1 is placed in the cavity 14. Supply and fill at a predetermined pressure.

As described above, the cavity 14 of the mold 13
When the raw material powder 1 is filled in the inside, next, as shown in FIG. 3, the upper lid 6 of the closed box 5 is closed and the mold 13 is vibrated by operating the vibrating device 9 and, at the same time, from the compressed air supply pipe 7. Compressed air having a pressure of about 5 kg per square centimeter is sent to pressurize for 5 to 10 minutes to perform hydrostatic molding.

Although the block-shaped powder compact 2 is first formed in the cavity 14 of the mold 13 by the above-described molding, the operation of the vibration generator 9 and the compressed air supply pipe 7 are left as they are. The supply of compressed air from the device is stopped, and the process proceeds to the next adhesive solvent evaporation process.

In the adhesive solvent evaporation process, the block-shaped powder compact 2 in the mold 13 is energized by the heater 15 of the heating frame 14 to heat it to about 80 to 100 ° C., and at the same time, it is evacuated based on the operation of the vacuum pump. Evacuate tube 8 to 50-1
A vacuum degree of about 00 torr is applied for about 1 hour.

By this adhesive solvent evaporation treatment, the block-shaped powder molded body 2 has an appropriate strength because the water-soluble adhesive compounded therein forms a solidified film by evaporation of the solvent but is not yet hardened. Then, the solidified material block 3 in which the powders are bonded together becomes.

As described above, the mold 13 used when the powder solidified material block 3 is formed by the hydrostatic pressure molding using the powder solidified material manufacturing apparatus 4 and the adhesive solvent evaporation process,
Any type of mold may be used as long as it can withstand a pressure of about 5 kg per 1 square centimeter at the time of molding and a temperature of about 150 to 180 ° C. at the time of heat-curing the adhesive later. It is preferable to use it because the mold can be produced in a short time at low cost.

After the powder solidified material block 3 has been obtained in this manner, a precision component shape to be manufactured is then machined in the fifth step.

This machining may be carried out by any method because the powder solidified material block 3 is very excellent in machinability, but the CAD design data or the shape of the product model is precisely measured by three-dimensional measurement. If the machining data created based on the measurement data is used to machine the three-dimensional machine 18 controlled by the computer, the powder solidified precision component 19 can be easily formed.

In this case, by mixing an appropriate amount of the adhesive agent, the powder solidified material block 3 has sufficient strength to withstand chucking for attachment to a processing machine and has excellent workability and strength suitable for machining. By using a small-sized, low-rigidity and relatively inexpensive processing machine, the machined surface is machined in a good condition without the material breaking or peeling.

The powder solidifying material for machining is a block in the above embodiment, but since this shape is determined by pressure molding, a silicone rubber mold obtained by molding a product model as necessary. It is also possible to form the product into a shape close to the product by using, and to perform only finishing in machining.

The powder-solidified precision component 19 formed by machining the powder-solidified material block 3 is then subjected to a sixth step in a suitable heating furnace at a curing temperature of 150 to 180 ° C.
The adhesive heat-curing process of heating for ~ 30 minutes is applied, and by this, the material powder that was bonded by the solidified film due to solvent evaporation of the adhesive becomes firmly bonded by the cured film, and the powder is cured with a predetermined strength. It becomes the precision component 20.

[0069]

EFFECTS OF THE INVENTION The present invention has the constitution and operation as described above. First, it is made of a material such as stainless steel, titanium or ceramic which is difficult to cut, and the shape of a molding die or jig is complicated and high. Since dimensional accuracy is required, it has become possible to easily and inexpensively manufacture precision parts that cannot be produced by conventional sintering methods.

Further, even when using a material capable of cutting iron, copper, aluminum, etc., it is much better to process from a powder solidified material block than to machine from a metal material block, and the size and rigidity are small. It is advantageous that a low and relatively inexpensive processing machine can be used, and in addition, if the powder solidified material is brought close to the shape of the product, the processing amount can be reduced.

Further, there is a method of utilizing a powder-containing casting resin as a method for manufacturing a precision component by curing a powder of metal or ceramic with a curing agent, but the present invention is far more effective than this method. It is an excellent manufacturing method for precision parts.

That is, the powder-containing casting resin is a liquid epoxy resin containing metal powder such as iron, copper, aluminum or the like, or carbon powder in an amount of about 30 to 50% by weight. Inject and cure to manufacture precision parts.

Since the casting method is used to manufacture the parts as described above, the casting resin containing the powder must have good fluidity. Therefore, as described above, the blending amount of the powder is about 50% by weight at the maximum. The capacity is only about 25%, which means that the parts are mostly made of resin.

Precision parts manufactured by a casting method using a resin containing powder contract inevitably have poor dimensional accuracy because the resin shrinks when the resin cures. However, as mentioned above, the machined surface becomes rough when machined because of the large amount of resin. It does not work well with high precision because it gets rid of.

If the precision component contains a large amount of resin,
The thermal conductivity and the heat resistance are inferior. For example, the durability is much better when the manufacturing method of the present invention is used than when a mold for molding synthetic resin is made.

That is, when the performance of the mold manufactured by the method of the present invention using the stainless steel of Formulation Example 1 as the powder material and the conventional resin mold containing copper powder is compared, the thermal conductivity is in units of cal.
The tensile strength per square centimeter of the conventional mold is 75, which is far worse than that of the conventional mold of 0.0013 at 0.05 / cm · sec ° C.
Compared to 0 kg, the conventional type was much inferior to 450 kg.

Therefore, when actually molding a synthetic resin using this mold, the mold of the present invention could mold 600 pieces in a molding cycle of 50 seconds, while the conventional mold molds 300 pieces.
Only 30 moldings were made in a second molding cycle,
The mold of the present invention was far superior in molding workability and durability.

As described above, according to the present invention, it is possible to manufacture a precision part such as a mold or a jig for molding synthetic resin with high accuracy and durability, and at a low cost in a short manufacturing time. It has a great effect on trial production of products or high-mix low-volume production.

[Brief description of drawings]

[Figure 1] Precision parts manufacturing process chart,

FIG. 2 is a sectional view of a powder solidified material manufacturing apparatus (manufactured state of powder compact),

FIG. 3 is a cross-sectional view of the powder solidified material manufacturing apparatus (powder solidified material manufacturing state),

[Brief description of reference numerals]

 1 Material powder 2 Block-shaped powder compact 3 Powder solidification material block 4 Powder solidification material molding device 5 Closed box 7 Compressed air supply pipe 8 Vacuum exhaust pipe 13 type 15 Heating frame 18 Three-dimensional processing machine 19 Powder solidification precision part 20 Powder hardening Precision parts

Claims (3)

[Claims] 1. A step of forming a raw material powder in which a thermosetting water-soluble adhesive is mixed with a raw material powder made of metal and / or ceramic powder, and the raw material powder is pressure-molded to form a raw material-shaped powder compact. Step, and a step of solidifying a powder compact of this material shape based on an adhesive solvent evaporation process that evaporates the solvent of the adhesive to form a powder solidified material. A powder characterized by the steps of machining a part to form a powder solidified precision machined part and heating the powder solidified precision machined part to the curing temperature of the adhesive to form a powder hardened precision part. Manufacturing method for precision parts by curing. 2. The method for producing a precision component by powder curing according to claim 1, wherein the sinterable powder is a fine powder having an average particle size of 30 μm or less. 3. The method for producing precision parts by powder curing according to claim 1, wherein the blending amount of the thermosetting water-soluble adhesive is 5 to 20% by volume with respect to the raw material powder.