JP2006326632A - Method for molding powder molding, and molding device for powder molding - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce evil caused by raw material powder remaining, e.g., on the upper side of the body of a molding die for forming a molding part. <P>SOLUTION: A removing means 17 for raw material powder 6A remaining at the sliding path 7A of a shoe box 7 and a through hole 1 is provided so as to face to the sliding path 7A and the through hole 1. A powder molding A is molded by a molding part, and when the powder molding A is thereafter discharged from the molding part, after the powder molding A is discharged from the molding part and also before a solution 8 is stuck thereto, the raw material powder 6A remaining on the upper side 3 of a die 2 and the upper side 19A in the vicinity thereof is removed by the removing means 17, thus the upper side 3 and the upper side 19A are made clean, and the sliding of the shoe box 7 can be satisfactorily performed. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a method for molding a powder molded body and a molding apparatus for a powder molded body.

Conventionally, in order to reduce the extraction pressure of the powder compact from the molding part of the molding die and improve the density of the powder compact, a solution in which a lubricant is dissolved in water or a molding part equipped with heating means Fill the raw material powder by spraying and adhering a dispersion liquid in which the lubricant is dispersed in water toward the molding part, evaporating the water of the solution or the water of the dispersion liquid to form a lubricating layer in the molding part. Thereafter, a molding method of a powder molded body is known in which a punch is fitted into the molded portion to mold a powder molded body, and then the powder molded body is extracted from the molded portion (for example, Patent Documents 1 and 2). ).
JP 2004-167582 A Japanese Patent Application Laid-Open No. 2004-289892

  In the prior art, the raw material powder is filled into the molding part by the raw material supplier that slides on the upper surface of the mold body, but the raw material powder is applied to the upper surface of the mold body before the raw material supplier slides. In the case where the material remains, there is a fear that the raw material supplier cannot be satisfactorily slid. This is caused by the fact that the raw material powder that cannot be rubbed by the raw material supply body remains on the upper surface of the mold body, or the raw material powder that has adhered to the upper punch by, for example, magnetization, falls to the upper surface of the mold body. In particular, when the raw material powder remains on the upper surface of the mold main body and the solution or dispersion liquid adheres to the remaining raw material powder, it becomes a lump and the sliding of the raw material supply body cannot be further improved. There is also a fear. As a result, the raw material powder that cannot be completely slid by the raw material supply body remains on the mold body and the lower punch, and is fixed by the solution or dispersion, and the surface of the powder molded body is blackened or powdered.

  The problem to be solved is to reduce the adverse effects of the raw material powder remaining on the upper surface of the mold body forming the molding part.

  According to the first aspect of the present invention, after the lubricating liquid is attached to the molding part formed on the molding die body, the raw material powder is filled into the molding part by a raw material supplier that slides on the upper surface of the molding die body, and then punching is performed. In a molding method of a powder molded body, which is fitted into the molded part to mold a powder molded body, and then the powder molded body is taken out from the molded part, after the powder molded body is taken out from the molded part and Before the lubricating liquid is adhered, the raw material powder remaining on or near the upper surface of the mold main body is removed.

  According to the second aspect of the present invention, a lubricating liquid is adhered to a molding portion formed on the mold body, and a liquid layer of the adhered lubricating liquid is evaporated to form a lubricating layer on the molding portion. Powder molding in which the raw material powder is filled into the molding part by a raw material supply body that slides, and thereafter a punch is fitted into the molding part to form a powder compact, and thereafter the powder compact is taken out from the molding part. In the body molding method, after the powder molded body is taken out and before the lubricating liquid is attached, the raw material powder remaining on or near the upper surface of the molding body is removed. This is a body molding method.

  The invention according to claim 3 is the method for forming a powder compact according to claim 1 or 2, wherein the means for removing the remaining raw material powder is formed by blowing means.

  According to a fourth aspect of the present invention, there is provided the method for forming a powder compact according to the first or second aspect, wherein the means for removing the remaining raw material powder is formed by suction means.

  The invention according to claim 5 is the method for forming a powder compact according to claim 1 or 2, wherein the means for removing the remaining raw material powder is formed by the scraping means.

  According to a sixth aspect of the present invention, there is provided a molding die main body having a through hole that vertically forms a side surface of a powder molded body, a lower punch that fits into the through hole from below, and a fitting into the through hole from above. An upper punch, an attachment means provided in the through hole for adhering a lubricating liquid to the through hole, and a raw material supply body that contains raw material powder and slides on the upper surface of the mold body to fill the molding portion. A molding apparatus for a powder molded body, characterized by comprising a means for removing residual raw material powder remaining in the sliding path or the through hole facing the sliding path or the through hole of the raw material supply body It is.

  The invention according to claim 7 is the apparatus for forming a powder compact according to claim 6, wherein the means for removing the remaining raw material powder is formed by blowing means.

  The invention according to claim 8 is the molding apparatus for the powder compact according to claim 6, wherein the means for removing the remaining raw material powder is formed by suction means.

  The invention of claim 9 is the apparatus for forming a powder compact according to claim 6, wherein the means for removing the remaining raw material powder is formed by scraping means on the upper surface.

  The invention according to claim 10 is a mold main body having a through hole that vertically forms a side surface of a powder molded body, a lower punch that fits into the through hole from below, and a fitting into the through hole from above. An upper punch, an attachment means provided in the through hole for adhering a lubricating liquid to the through hole, and a raw material supply body that contains raw material powder and slides on the upper surface of the mold body to fill the molding portion. A powder molding apparatus is provided, wherein the upper punch located above the through hole is provided with means for removing adhering raw material powder.

  The invention of claim 11 is the apparatus for forming a powder compact according to claim 10, wherein the means for removing the adhering raw material powder is formed by blowing means.

  According to the first aspect of the present invention, by removing the residual raw material powder by the removing means, the raw material supply body can be satisfactorily slid with the upper surface clean.

  According to the second aspect of the present invention, if there is a heating means for evaporating the liquid component, even if the residual raw material powder is likely to adhere to the upper surface, the residual raw material powder is removed by the removing means to slide the raw material supply body. Can be performed satisfactorily.

  According to the invention of claim 3, the remaining raw material powder can be blown off and removed.

  According to the invention of claim 4, there is no scattering of the remaining raw material powder, and the remaining raw material powder is also possible.

  According to the invention of claim 5, the remaining raw material powder adhering to it can be removed reliably.

  According to the sixth aspect of the present invention, by removing the remaining raw material powder by the removing means, it is possible to satisfactorily slide the raw material supply body with the upper surface being in a clean state.

  According to the invention of claim 7, the remaining raw material powder can be blown off and removed.

  According to the invention of claim 8, there is no scattering of the remaining raw material powder, and the remaining raw material powder is also possible.

  According to the invention of claim 9, the adhering residual raw material powder can be reliably removed.

  According to the invention of claim 10, it is possible to reliably remove the adhering raw material powder adhering.

  According to the eleventh aspect of the present invention, the adhering raw material powder that adheres can be blown off and reliably removed.

  Preferred embodiments of the present invention will be described with reference to the accompanying drawings. The embodiments described below do not limit the contents of the present invention described in the claims. In addition, all of the configurations described below are not necessarily essential requirements of the present invention.

  FIGS. 1 to 7 show Example 1, in which 1 is a through-hole as a molding part, and this through-hole 1 is a molding for molding a side surface of a powder compact A, which will be described later. A die punch 2 is vertically penetrated through the upper surface 3 of the die 2 as a mold body so that the lower punch 4 is fitted from below the through hole 1 and the upper punch 5 is fitted from above the through hole 1. It has become. Further, a shoe box 7 is provided which is a box-shaped raw material supply body having a bottom surface opened by supplying raw material powder 6 containing metal powder as a main raw material. The shoe box 7 is provided so as to be slidable back and forth on the upper surface 3 of the die 2 and an upper surface 19A of a die mount 19 which will be described later. Reference numeral 7A denotes a sliding path of the shoe box 7 provided on the upper surface 3 and the upper surface 19A. Further, a nozzle 9 as an injection means for adhering a solution 8 as a lubricating liquid obtained by dissolving a lubricant in water as a solvent to the through hole 1 is integrally provided above the front side of the shoe box 7 via an attachment member 9A. Yes. Instead of the solution 8, a dispersion liquid in which a lubricant is dispersed in water as a solvent may be used. Further, as the lubricating liquid, a solution obtained by dissolving zinc stearate with an organic solvent such as acetone may be used. The nozzle 9 may not be integral with the shoe box 7 but may be fixed above the through hole 1.

  Further, a molding part heating means 10 is provided around the molding part 2A of the powder molded body A defined by the through hole 1 and the lower punch 4 fitted in the through hole 1, and the molding part heating means 10 is provided. Is connected to a molding part heating temperature control means 11 provided with a detecting means 11S for detecting the temperature of the die 2 and consequently the temperature of the molding part 2A. For example, it is higher than 130 ° C. and lower than 180 ° C. Preferably, the temperature is controlled to be higher than the water evaporation temperature of the solution 8 and lower than the melting temperature of the lubricant, such as 150 ° C. ± 15 ° C., more preferably 150 ° C. ± 5 ° C.

  Further, the nozzle 9 serving as the injection means is provided so that the nozzle port 12 can be opposed to the through hole 1 so as to face the through hole 1, and a tank-shaped container 13 containing the solution 8 is provided with a supply pump (not shown). It is connected to the nozzle 9 through a pipe-like supply path 14 provided. The adhering means 15 for the solution 8 is formed by the nozzles 9 provided so as to face the storage part 13, the supply path 14, and the molding part 2A.

  Further, a removing means 17 formed by a nozzle that blows off the raw material powder 6 remaining on the upper surface 3 is provided above one side of the upper surface 3, and a jet outlet 17 A of the removing means 17 is substantially formed in the through hole 1 and the sliding. An air compressor 18 is connected to the removing means 17 via an open / close control valve 18A. The jet port 17A may be provided facing only the through hole 1 or only the sliding path 7A.

  The die 2 is fitted to the die mounting base 19 so that the shoe box 7 can slide on the sliding path 7A of the upper surface 19A and the upper surface 3 of the die mounting base 19. A raw material storage unit 20 is connected to the upper part via a supply path 20A. Advancing / retreating drive device 21 such as a servo motor or a cylinder device is connected to the rear portion of the shoe box 7 via a rod 21A, and a powder molded body A formed on the upper surface 3 is formed on the opposite side. A pressing body 22 is provided so as to project out. Note that both sides of the die mounting base 19 are fixed and supported by support members 24 erected on a base base 23 disposed below.

  Further, the core rod 25 is disposed on the axis X of the through hole 1. The core rod 25 is erected on the base base 23, and the upper portion 25A is provided flush with the upper surface 3. The die 2 is fixed to the upper surface of the lifting platform 26, and the core rod 25 penetrates the axis X of the lifting platform 26 so as to be slidable. A core rod heating means 27 made of a band heater is provided on the lower side of the core rod 25, and a heat insulating material 27A made of glass wool is provided outside the core rod heating means 27. The core rod heating means 27 is connected to the forming part heating temperature control means 11 provided with the detecting means 11T for detecting the temperature of the core rod 25 so that the above-described temperature control can be performed.

  Further, a removing means 29 for the attached raw material powder 6B adhering to the upper punch 5 located above the through hole 1 is provided. In this removing means 29, a jet outlet 29A connected via an opening / closing control valve 18A faces the lower portion of the upper punch 5 located above the through hole 1 which is a standby position.

  Next, a manufacturing method will be described. This manufacturing method is so-called water-soluble warm lubrication molding in which high-density molding is performed. In the first step, the molding part heating means 10 and the core rod heating means 27 previously controlled by the molding part heating temperature control means 11 are used. The surface of the through-hole 1 and the surface of the core rod 25 in the through-hole 1 are set to be higher than the evaporation temperature of water in the solution 8 and lower than the melting temperature of the lubricant due to heat. Further, the shoe box 7 is advanced through the advance / retreat drive device 21 and the nozzle port 12 of the nozzle 9 is disposed in advance on the through hole 1 as indicated by a one-dot chain line. Then, in a state where the lower punch 4 is fitted into the through hole 1 of the die 2 to form the molding part 2A, the supply pump (not shown) is operated to supply the solution 8 in the container part 13 to the nozzle 9 It spouts out as a mist from the mouth 12. This solution 8 is sprayed and attached to the molding part 2A of the die 2 heated by the molding part heating means 10 and the core rod heating means 27 and the core rod 25 in the through hole 1. For this reason, the solution 8 adheres almost uniformly to the surface of the forming part 2A of the die 2 and the core rod 25 provided in the through hole 1, and the water evaporates, so that the solution 8 is dried and the crystals are entirely formed. By growing, a crystallized layer as the lubricant layer 28 of the lubricant is uniformly formed.

  Next, after a lapse of drying time of the solution 8 from the first step, for example, 1 to 3 seconds, as shown in the second step of FIG. 2, the shoe box 7 further moves forward from the raw material storage unit 20 via the supply path 20A. Then, the raw material powder 6 accommodated in the shoe box 7 is dropped into the molding part 2A and filled.

  Next, as shown in the third step of FIG. 3, after the shoe box 7 is retracted, the die 2 is moved downward, and the upper punch 5 is inserted into the molding portion 2A of the through-hole 1 from the upper side. The raw material powder 6 is compressed so as to be sandwiched between 5 and the lower punch 4. At this time, the lower punch 4 compresses the raw material powder 6 while being slightly lowered together with the lifting platform 26. In the third step, the raw material powder 6 is compressed in a lubricated state into a crystallization layer (lubricant layer 16) formed of a lubricant on the surface of the through-hole 1 and the surface of the core rod 25. Thereby, the outer peripheral surface of the powder compact A is formed by the through-hole 1, the inner peripheral surface by the core rod 25, the lower surface by the lower punch 4, and the upper surface by the upper punch 5.

  When the shoe box 7 is retracted, the residual raw material powder 6A remaining on the upper surface 3 and the upper surface 19A of the die plate 19 is scraped and removed as the shoe box 7 retracts. If the cutting is not sufficient, the remaining raw material powder 6A remains.

  Then, in the pressure-molded powder compact A, as shown in the fourth step of FIG. 4, the upper punch 5 is raised, and the upper surface of the lower punch 4 is substantially level with the upper surface 3 of the die 2. Sometimes it can be removed and taken out. Even during the removal, the powder compact A comes into contact with the crystallization layer (lubricant layer 16) formed of the lubricant in a lubricated state, and most of the lubricant layer 16 is peeled off.

  Next, as shown in the fifth step of FIG. 5, the shoe box 7 moves forward slightly in the sliding path 7 </ b> A so that it does not reach at least the upper surface 3, and the powder compact A on the upper surface of the lower punch 4 is pressed. Press out by 22 in one direction and pay out. In this manner, with the powder compact A discharged from at least the upper surface 3, the opening / closing control valve 18A is opened, and the compressed air from the air compressor 18 is ejected from the ejection port 17A toward the upper surface 3 and the upper surface 19A. The remaining raw material powder 6A remaining on the upper surface 3 or the upper surface 3 and the upper surface 19A of the die mounting table 19 is blown off, and the upper raw material 3 or the upper surface 3 and the upper surface 19A of the die mounting table 19 are not cleaned. To. Furthermore, the upper surface of the lower punch 4 and the upper surface of the core rod 25 are also clean. The removal of the remaining raw material powder 6A by the removing means 17 may be performed every molding cycle or every several molding cycles. Further, when the residual raw material powder 6A is removed by the removing means 17, the lower punch 4 may be lowered.

  At the same time, the compressed air from the air compressor 18 is ejected from the jet outlet 29A toward the lower portion of the upper punch 5, the attached raw material powder 6B adhering to the portion is blown off, and the lower portion of the upper punch 5 is adhering raw material powder 6B. Keep it clean and not left. This operation is not performed at the same time as that of the removing means 17, but may be performed at different times by using respective opening / closing control valves.

  Next, as shown in the sixth step of FIG. 6, the lower punch 4 is lowered to form the molded portion 2A, and the shoe box 7 is further advanced. At this time, the upper surface 3 or the upper surface 3 and the upper surface 19A of the die mount 19 are in a clean state in which the remaining raw material powder 6A does not remain, so that the raw material powder 6 can slide without spilling from the shoe box 7. And the nozzle port 12 of the nozzle 9 is arrange | positioned on the through-hole 1, and the solution 8 is ejected from the nozzle port 12 of the nozzle 9 as a mist form. As a result, the solution 8 adheres almost uniformly to the surfaces of the molding part 2A and the core rod 25, and the water evaporates, so that the solution 8 dries and crystals grow entirely, and the lubricant layer 16 of the lubricant is formed. A crystallization layer is formed uniformly.

  Next, as shown in the seventh step of FIG. 7, the upper surface 3 or the upper surface 3 and the upper surface 19 </ b> A of the die mount 19 are in a clean state in which no remaining raw material powder 6 </ b> A remains, and the raw material powder 6 spills from the shoe box 7. The material powder 6 accommodated in the shoe box 7 is dropped and filled in the molded part 2A. Thereafter, as shown in FIG. 3 and the like, the raw material powder 6 is repeatedly compressed and molded.

  As mentioned above, in the said Example, the die | dye 2 which has the through-hole 1 which forms the side surface of the powder compact A vertically on the upper surface, the lower punch 4 fitted to the said through-hole 1 from the downward | lower direction, and the said penetration An upper punch 5 that fits into the hole 1 from above, an attachment means 15 that is provided in the through-hole 1 and adheres the solution 8 to the through-hole 1, and contains raw material powder 6 and slides on the upper surface 3 of the die 2. And the remaining raw material powder remaining in the sliding path 7A or the through hole 1 facing the sliding path 7A or the through hole 1 of the shoe box 7. 6A removal means 17 is provided, and after the lower punch 4 is fitted and the solution 8 is attached to the molding part 2A formed in the through hole 1, the raw powder is produced by the shoe box 7 sliding on the upper surface 3 of the molding part 2A. 6 is filled in the molding part 2A, and the upper punch 5 is then moved forward. The powder molded body A is molded by fitting into the molded section 2A, and when the powder molded body A is further taken out from the molded section 2A, the powder 8 is attached after the powder molded body A is taken out from the molded section 2A. Before removing, the residual raw material powder 6A remaining on the upper surface 3 of the die 2 and the upper surface 19A in the vicinity thereof is removed by the removing means 17, so that the upper surface 3 and the upper surface 19A are kept clean and the shoe box 7 slides well. Can be done.

  In particular, when the solution 8 is attached to the molding part 2A and the liquid layer of the attached solution 8 is evaporated to form the lubricating layer 16 on the molding part 2A, the molding part heating means 10, The core rod heating means 27 is provided, so that the residual raw material powder 6A may be affected by heat, but by eliminating the residual raw material powder 6A, the shoe box 7 that moves along the sliding path 7A is always better. Raw material powder 6 can be supplied to the molding part 2A.

  Further, the means 17 for removing the residual raw material powder 6A is a blowing means for blowing out compressed air from the jet port 17A toward the molding part 2A and the sliding path 7A, so that the molding part 2A itself is not processed. Means for removing 17 may be provided.

  Furthermore, the lubricant can be easily attached to the surface of the through-hole 1 by using a solution 8 in which a lubricant is dissolved in a solvent or a dispersion in which a lubricant is dispersed in a solvent.

  Further, the compressed air from the air compressor 18 is jetted from the jet outlet 29A toward the lower portion of the upper punch 5, and the adhering raw material powder 6B adhering to the portion is blown off by the removing means 29, and the lower portion of the upper punch 5 is adhered. Since the raw material powder 6B is in a clean state in which it does not remain, when the upper punch 5 is fitted into the through hole 1, it is possible to eliminate the adverse effects caused by the attached raw material powder 6B.

  In addition, a molding part heating means 10 is provided around the molding part 2A, and the molding part heating means 10 is provided with a detecting means 11S for detecting the temperature of the die 2 and consequently the temperature of the molding part 2A. The core rod heating means 27 is provided on the lower side of the core rod 25. The core rod heating means 27 includes a detecting means 11T for detecting the temperature of the core rod 25. 11 and the temperature of the surface of the through-hole 1 and the core rod 25 is set to 150 ° C. ± 15 ° C., preferably 150 ° C. ± 5 ° C. By controlling the temperature to be higher than the temperature and lower than the melting temperature of the lubricant, the temperature of the molded part 2A can be determined and the temperature can be managed. In particular, at a temperature of 130 ° C. or lower, the solution 18 may be entrained due to insufficient drying of the solution 18, and at a temperature of 180 ° C. or lower, the punch surface of the lower punch 4 becomes a temper color and the powder compact A may not be glossy.

  FIG. 8 shows a second embodiment, and the same parts as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted. The dust collection / suction type removal means 31 for removing the residual raw material powder 6A in the second embodiment is provided with a suction cover 32 so as to cover the molded part 2A or the upper side of the sliding path 7A. A suction device 34 such as a vacuum pump is connected via an open / close control valve 33.

  Therefore, in Example 2, the powder compact A on the upper surface of the lower punch 4 is slightly advanced by the pressing body 22 in the one-side direction by slightly advancing the sliding path 7A so that the shoe box 7 does not reach at least the upper surface 3. In the state where the powder compact A is discharged from at least the upper surface 3, the open / close control valve 33 is opened, and the upper surface 3 or the upper surface 3 and the die are attached by the suction force from the suction device 34 from the suction cover 32. The remaining raw material powder 6A remaining on the upper surface 19A of the table 19 is sucked, and the remaining raw material powder 6A is collected in the suction device 34, and the remaining raw material powder 6A remains on the upper surface 3 or the upper surface 3 and the upper surface 19A of the die mounting table 19. Not clean. Furthermore, the upper surface of the lower punch 4 and the upper surface of the core rod 25 are also clean.

  Thus, by removing the residual raw material powder 6A when the removing means 31 is an intake type, the residual raw material powder 6A is not scattered when the residual raw material powder 6A is removed. Can also be done easily.

  FIG. 9 shows a third embodiment, and the same parts as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted. The scraping-type removing means 41 for removing the residual raw material powder 6A in Example 3 is provided with a scraping body 42 called a scraper or the like that slides on the molding portion 2A or the sliding path 7A at the front portion of the shoe box 7. It is a thing. The downward tip 42A of the scraping body 42 is in contact with the upper surface 3, 19A with an appropriate contact pressure, and the width of the scraping body 42, that is, the length in the direction perpendicular to the direction of the sliding path 7A is The width of the shoe box 7 is almost the same.

  Therefore, in Example 3, the shoe box 7 advances along the sliding path 7A, so that the powder compact A that has been on the upper surface of the lower punch 4 is pressed out in one direction by the pressing body 22 and simultaneously scraped. By scraping off, the remaining raw material powder 6A remaining on the upper surface 3 or the upper surface 3 and the upper surface 19A of the die mounting table 19 is scraped, and the remaining raw material powder 6A does not remain on the upper surface 3 or the upper surface 3 and the upper surface 19A of the die mounting table 19. The shoe box 7 can be slid in a clean state. Furthermore, the upper surface of the lower punch 4 and the upper surface of the core rod 25 are also clean.

  Thus, by making the removing means 41 a scraping type, when the residual raw material powder 6A is scraped off and removed, the residual raw material powder 6A adhering relatively firmly can be reliably removed.

  As described above, the molded body according to the present invention can be applied to various uses.

It is sectional drawing which shows the 1st process which shows Example 1 of this invention. It is sectional drawing which shows the 2nd process which shows Example 1 of this invention. It is sectional drawing which shows the 3rd process which shows Example 1 of this invention. It is sectional drawing which shows the 4th process which shows Example 1 of this invention. It is sectional drawing which shows the 5th process which shows Example 1 of this invention. It is sectional drawing which shows the 6th process which shows Example 1 of this invention. It is sectional drawing which shows the 7th process which shows Example 1 of this invention. It is sectional drawing which shows Example 2 of this invention. It is sectional drawing which shows Example 3 of this invention.

Explanation of symbols

1 Through hole 2 Die (mold body)
2A Molding part 3 Upper surface 4 Lower punch 5 Upper punch 6 Raw material powder 6A Remaining raw material powder 6B Adhering raw material powder 7 Shoe box (raw material supplier)
7A Sliding path 8 Solution (lubricant)
17 31 41 Removal means A Powder compact

Claims (11)

  After adhering the lubricating liquid to the molding part formed on the molding die body, the raw material powder is filled into the molding part by a raw material supplier that slides on the upper surface of the molding die body, and then a punch is fitted into the molding part. In the method of forming a powder molded body, and thereafter, after the powder molded body is taken out from the molded portion and before the lubricating liquid is adhered, A method for forming a powder molded body, comprising removing raw material powder remaining on or near the upper surface of the mold body.   A raw material supplier that slides on the upper surface of the mold body after a lubricating liquid is adhered to the molding part formed on the molding body and the lubricant layer is evaporated to form a lubricating layer on the molding part. In the molding method of the powder molded body, the raw material powder is filled in the molded portion, and then a punch is fitted into the molded portion to mold a powder molded body, and then the powder molded body is taken out from the molded portion. A method for molding a powder molded body, comprising: removing the raw material powder remaining on or near the upper surface of the mold body after taking out the powder molded body and before adhering the lubricating liquid.   The method for forming a powder compact according to claim 1 or 2, wherein the means for removing the remaining raw material powder is formed by blowing means.   3. The method for forming a powder compact according to claim 1, wherein the means for removing the remaining raw material powder is formed by suction means.   The method for forming a powder compact according to claim 1 or 2, wherein the means for removing the remaining raw material powder is formed by the scraping means.   A molding die main body having a through hole that vertically forms a side surface of the powder molded body, a lower punch that fits into the through hole from below, an upper punch that fits into the through hole from above, and the penetration An adhering means for adhering a lubricating liquid to the through-hole provided in the hole, and a raw material supply body that contains the raw material powder and slides on the upper surface of the mold main body to fill the molded portion. An apparatus for molding a powder molded body, characterized in that means for removing residual raw material powder remaining in the sliding path or the through hole is provided facing the sliding path or the through hole.   7. The apparatus for forming a powder compact according to claim 6, wherein the means for removing the remaining raw material powder is formed by blowing means.   7. A molding apparatus for a powder compact according to claim 6, wherein the means for removing the remaining raw material powder is formed by suction means.   7. The apparatus for molding a powder compact according to claim 6, wherein the means for removing the remaining raw material powder is formed by scraping means on the upper surface.   A molding die main body having a through hole that vertically forms a side surface of the powder molded body, a lower punch that fits into the through hole from below, an upper punch that fits into the through hole from above, and the penetration An adhering means for adhering a lubricating liquid to the through-hole provided in the hole, and a raw material supply body that contains raw material powder and slides on the upper surface of the mold body to fill the molded portion, An apparatus for forming a powder compact, wherein the upper punch is provided with means for removing adhering raw material powder.   11. The apparatus for forming a powder compact according to claim 10, wherein the means for removing the adhering raw material powder is formed by blowing means.

Images