WO2014148516A1 - Procédé de moulage en sable - Google Patents

Procédé de moulage en sable Download PDF

Info

Publication number
WO2014148516A1
WO2014148516A1 PCT/JP2014/057416 JP2014057416W WO2014148516A1 WO 2014148516 A1 WO2014148516 A1 WO 2014148516A1 JP 2014057416 W JP2014057416 W JP 2014057416W WO 2014148516 A1 WO2014148516 A1 WO 2014148516A1
Authority
WO
WIPO (PCT)
Prior art keywords
sand mold
mold
temperature
partial
casting
Prior art date
Application number
PCT/JP2014/057416
Other languages
English (en)
Japanese (ja)
Inventor
哲夫 三浦
本田　勉
善光 渡辺
渡辺　健一
Original Assignee
テクノメタル株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by テクノメタル株式会社 filed Critical テクノメタル株式会社
Priority to EP14769379.0A priority Critical patent/EP2977125B1/fr
Publication of WO2014148516A1 publication Critical patent/WO2014148516A1/fr

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/02—Sand moulds or like moulds for shaped castings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/10—Cores; Manufacture or installation of cores
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
    • B22D27/04—Influencing the temperature of the metal, e.g. by heating or cooling the mould

Definitions

  • the present invention relates to a sand mold casting method.
  • Patent Document 1 proposes an austenitic heat-resistant cast steel that replaces a ferritic heat-resistant cast steel that is generally employed as a material for automobile exhaust system parts such as an exhaust manifold and a turbocharger.
  • This austenitic heat-resistant cast steel is excellent in high temperature strength and has a good hot water flow during casting. According to this austenitic heat-resistant cast steel, it is possible to meet demands for high heat resistance while reducing casting defects.
  • the sand mold casting method is a metal processing method in which sand as an aggregate is combined with a binder to form a sand mold, and molten metal is poured into the sand mold to produce a product. Aggregate sand can be classified into natural sand and artificial sand, and these recycled sands are used according to the purpose of use.
  • a hybrid binder is known in addition to organic (furan resin, phenol resin, urethane resin, gas curable binder, etc.) and inorganic (for example, water glass).
  • Patent Documents 2 to 5 disclose a hybrid binder and a hybrid casting method using the same.
  • This hybrid binder secures the strength (room temperature strength) when molding a sand mold (meaning including the core) with an organic binder, and ensures the strength of the sand mold (hot strength) during casting with ceramic. is there.
  • the hybrid binder is called XP alcohol solution, and this XP alcohol solution was selected from Group 4A or Group 4B (excluding carbon), Group 3A or Group 3B metal alkoxide and partial hydrolyzate thereof. It is a solution mainly composed of an alcohol solution containing one or two or more alcohol-soluble metal alkoxides and an alkali-soluble or alkaline-earth metal alcohol-soluble alkali compound in a state where hydrolysis is not progressing. .
  • Patent Documents 2 to 5 for details of the XP alcohol solution.
  • the hybrid binder secures the strength (room temperature strength) when molding a sand mold (meaning including the core) with an organic binder component and the sand mold strength (hot strength) during casting with a ceramic component. It is.
  • molten metal at a high temperature can be poured into a sand mold, so that it is possible to cast a metal having a poor hot water flow or a thin product requiring a severe hot water flow.
  • JP-A-7-90502 Japanese Patent No. 3139918 JP 2010-42985 A JP 2012-35269 A JP 2002-143983 A
  • the hybrid casting method described above can maintain the sand mold strength even at a high temperature of, for example, 1000 ° C. or higher, by adopting a hot casting method in which the molten metal is cast using a high temperature and / or a sand mold heated to a high temperature, The risk described above can be greatly reduced.
  • An object of the present invention is to provide a sand casting method capable of suppressing the risk that molten metal does not spread over the entire area of the sand mold cavity product part while suppressing cost increase as much as possible.
  • a further object of the present invention is to provide a sand casting method capable of reducing the casting defects of a metal having a relatively poor hot water flow and the casting defects of a thin-walled product that requires a severe hot water flow.
  • a further object of the present invention is to provide a sand mold casting method that can produce a cast product having a relatively thin wall using a metal having a relatively poor hot water flow in accordance with the gravity casting method.
  • the above technical problem is, according to one aspect of the present invention, Preparing a sand mold having a recess formed in the main mold and opened in the cavity of the main mold, and a partial sand mold removable in the recess; A step of setting the partial sand mold to a temperature of 200 ° C. or higher, which is higher than the main mold; Installing the partial sand mold at a temperature of 200 ° C. or higher in the recess of the main mold; It is achieved by providing a sand mold casting method including a step of casting a molten metal into the main mold in which the partial sand mold having a temperature of 200 ° C. or more is incorporated.
  • the technical problem is Preparing a sand mold having a main mold, a core installed in the cavity product portion of the main mold, and a partial sand mold detachable in a recess formed in the core and opened in the surface of the core;
  • FIG. 5 is a plan view of the sand mold illustrated in FIG. 4.
  • FIG. 3 is a side view of a sand mold in which a first partial sand mold is incorporated in an upstream portion of a runner and a cavity product portion and for casting a 2 mm thin test piece.
  • FIG. 7 is a plan view of the sand mold illustrated in FIG. 6.
  • FIG. 4 is a side view of a sand mold in which a second partial sand mold is incorporated in a side portion of a cavity product portion and for casting a 2 mm thin test piece.
  • FIG. 9 is a plan view of the sand mold illustrated in FIG. 8.
  • FIG. 5 is a side view of a sand mold in which a third partial sand mold is incorporated in a downstream portion of a cavity product portion and for casting a 2 mm thin test piece. It is a top view of the sand mold shown in FIG. It is a perspective view of the 1st partial sand mold. It is a perspective view of the 2nd partial sand mold.
  • FC cast iron
  • FC cast iron
  • SCH heat-resistant steel
  • FIG. 1 shows resistance to bending of a test piece at room temperature, 200 ° C., and 300 ° C., that is, bending strength (Kg / cm 2 ).
  • FIG. 2 shows the strength reduction rate (%) of the test piece accompanying heating at 200 ° C., 300 ° C., 400 ° C., and 500 ° C. The strength reduction rate (%) was calculated based on the normal temperature.
  • the organic binder has a strength reduction of about 40% at 200 to 300 ° C., but has an appropriate strength (a bending strength of about 40 kg / cm 2 at 200 ° C., a bending strength of about 24 kg / cm 2 at 300 ° C. ).
  • any temperature of about 200 ° C. to about 350 ° C., preferably about 200 ° C. to about 300 ° C. can be applied to the present invention.
  • the hybrid binder (XP alcohol solution) described above has a characteristic that can maintain the sand mold strength up to a temperature of about 1000 ° C. or higher.
  • the XP alcohol solution is one or more alcohols selected from Group 4A or Group 4B (excluding carbon), Group 3A or Group 3B metal alkoxide and partial hydrolyzate thereof.
  • the solution is mainly composed of an alcohol solution containing a soluble metal alkoxide and an alcohol-soluble alkali compound of an alkali metal or alkaline earth metal in a state where hydrolysis is not progressing.
  • Patent Document 2 Patent Document 2
  • Patent Documents 3 to 5 cited above
  • HiSiMo ductile (spheroidized graphite) cast iron and austenitic spherical black smoke cast iron (Niresto D5S) have an excellent hot water flow.
  • cast iron (FC) and heat resistant steel (SCH) have a relatively poor hot water flow, and heat resistant steel (SCH) has a poor hot water flow than cast iron (FC).
  • a wall with a thickness of 2mm stands out, and the mass production technology for castings with a thickness of 2mm or less is said to be a dream technology.
  • HiSiMo ductile cast iron is said to enable mass production of an automotive exhaust manifold with a wall thickness of 2.5 mm, but it is still considered difficult to cross the wall with a wall thickness of 2 mm.
  • FIG. 3 to 5 show sand molds for casting a flat test piece (thickness 2 mm) having a rectangular shape in plan view.
  • FIG. 3 shows a sand mold cavity for casting a test piece.
  • FIG. 4 is a side view of the sand mold.
  • FIG. 5 is a plan view of the sand mold.
  • the sand mold 10 for the test piece shown in the figure was formed using RCS.
  • RCS is a resin-coated sand containing Cera beads as an aggregate and a resin as a binder.
  • the sand mold 10 for the test piece is composed of an upper mold 12 and a lower mold 14 (FIG. 4).
  • the cavity 16 of the sand mold 10 is composed of a cavity product portion 18 and a runner 20. Molten metal poured into the dam 22 flows into the runner 20 through the gate rod 24.
  • An overflow path 26 communicates with the downstream end portion of the cavity product portion 18, and the overflow path 26 opens at the upper end surface of the upper mold 12.
  • the cavity product part 18 has a length of 300.0 mm, a width of 95.0 mm, and a thickness of 2.0 mm.
  • One embodiment of the lower mold 14 of the test piece sand mold 10 includes a first recess 30 facing the upstream end portion of the cavity product portion 18 and the runner 20 as shown in phantom lines in FIGS. have.
  • the first recess 30 is open upward.
  • the second embodiment of the lower mold 14 of the sand mold 10 has an upstream of the side of the cavity product portion 18 (the side far from the gate bar 24) as shown in phantom lines in FIGS.
  • the second recess 32 extends from the end to the downstream end.
  • the second recess 32 is open upward.
  • the third embodiment of the lower mold 14 of the sand mold 10 has a third recess 34 that faces the entire area of the downstream end portion of the cavity product portion 18 as shown in phantom lines in FIGS. 10 and 11. ing.
  • the third recess 34 is open upward.
  • FIGS. 12 to 14 show partial sand molds 40, 42, and 44 that are detachable from the first to third recesses 30, 32, and 34, respectively.
  • the first partial sand mold 40 in FIG. 12 has a flat rectangular shape and has a shape complementary to the outline of the first recess 30 (FIGS. 6 and 7) described above.
  • the first partial sand mold 40 is integrated with the lower mold 14 to form the upstream end portion of the cavity product portion 18 and the cavity wall surface of the runner 20. .
  • the second partial sand mold 42 is integrated with the lower mold 14 and the side of the cavity product part 18 (the side far from the gate bar 24).
  • the cavity wall surface is formed.
  • the third partial sand mold 44 is integrated with the lower mold 14 to form the cavity wall surface of the downstream end portion of the cavity product portion 18.
  • FIG. 15 shows an example in which a test piece Tp is manufactured by casting cast iron (FC) using a sand mold 10 formed using RCS.
  • FC cast iron
  • the casting conditions of the first to third test pieces Tp (1) to Tp (3) shown in (I) to (III) of FIG. 15 were as follows.
  • FIG. 16 shows an example in which cast iron (FC) is cast by incorporating the heated first partial sand mold 40 (FIG. 12) into the sand mold 10 (FIGS. 6 and 7) provided with the first recess 30.
  • the partial sand mold 40 was formed using RCS.
  • RCS was prepared with Cerabeads # 650 and an organic binder (resin).
  • Casting conditions and results of (IV) in FIG. 16 (1) The melting temperature of cast iron (FC) was 1380 ° C. (2) The temperature of the sand mold 10 was normal temperature. (3) The heated first partial sand mold 40 was incorporated into the first recess 30 of the sand mold 10 (lower mold 14) (FIGS. 6 and 7). The temperature of the first partial sand mold 40 (FIG. 12) was 300 ° C. (4) The cast fourth test piece Tp (4) had a shape in which the downstream portion of the cavity product portion 18 of the sand mold 10 was missing, as can be seen from (IV) of FIG. The casting conditions are the same as those of the first test piece Tp (1) in FIG.
  • FIG. 17 shows an example in which a test piece Tp is produced by casting heat-resistant steel (SCH22) using the first partial sand mold 40 (FIG. 12) described above.
  • the first partial sand mold 40 was formed using a hybrid binder (XP alcohol solution).
  • the aggregate used was Cerabeads # 650.
  • FIG. 17 (VI) casting conditions and results: (1) The melting temperature of the heat resistant steel (SCH22) was 1514 ° C. (2) The temperature of the sand mold 10 was normal temperature. (3) The first partial sand mold 40 was incorporated into the first recess 30 of the sand mold 10 immediately after being heated and fired in a furnace at 1100 ° C. for 60 minutes. (4) The cast sixth test piece Tp (6) had no missing parts and was a finished product.
  • FIG. 18 shows an example in which seventh and eighth test pieces Tp (7) and Tp (8) are manufactured by casting heat-resistant steel (SCH22) using the above-mentioned second partial sand mold 42 (FIG. 13). Show.
  • the second partial sand mold 42 was formed using a hybrid binder (XP alcohol solution).
  • the aggregate used was Cerabeads # 650.
  • the completed eighth test piece Tp (8) can be obtained under the casting conditions of (VIII) (a) the melting temperature is higher. It is higher by about 10 ° C. and (b) is different from the casting condition of (VII) in that a heated sand mold 10 is used. Therefore, it can be understood that the hot water flow can be improved by using the heated sand mold 10 as the melting temperature of the heat-resistant steel is higher.
  • FIG. 19 shows the ninth and tenth test pieces Tp (9) obtained by casting heat-resistant steel (SCH22) using the above-mentioned third partial sand mold 44 (installed in the downstream portion of the cavity product portion 18: FIG. 19).
  • Tp (10) is shown as an example.
  • the third partial sand mold 44 was formed using a hybrid binder (XP alcohol solution).
  • the aggregate used was Cerabeads # 650.
  • the solid lines shown in FIGS. 20 to 26 indicate the temperatures at various locations inside the sand mold 10 when molten metal having a generally adopted temperature is poured into the sand mold 10. When this is referred to as a reference temperature, the temperature decreases in the process in which the molten metal flows inside the sand mold 10.
  • FIG. 20 shows a temperature drop (two-dot chain line) when the temperature of the molten metal poured into the sand mold 10 is increased.
  • the temperature in each part of the sand mold 10 can be maintained at a level higher than the reference temperature.
  • FIG. 20 teaches that the possibility of casting defects can be reduced by increasing the temperature of the molten metal.
  • FIG. 21 shows, with a two-dot chain line, a temperature that decreases when the molten metal flows through the sand mold 10 when cast using the heated sand mold 10.
  • the two-dot chain line in FIG. 21 corresponds to casting under the casting condition (III) in FIG.
  • the gradient of temperature drop can be reduced. That is, the degree of temperature drop of the molten metal flowing inside the sand mold 10 can be reduced.
  • This FIG. 21 teaches that the possibility of casting defects can be reduced by casting using the heated sand mold 10.
  • FIG. 22 shows that when the heat source (first partial sand mold 40) is installed in the downstream portion of the runner 20 and the upstream portion of the cavity product portion 18 and cast, the molten metal decreases in the process of flowing through the sand mold 10.
  • the temperature is indicated by a two-dot chain line.
  • the molten metal charged into the sand mold 10 enters the runner 20 while the temperature decreases.
  • the heat source (first partial sand mold 40) disposed in the downstream part of the runner 20 and the upstream part of the cavity product part 18 reduces the temperature of the molten metal in the downstream part of the runner 20 and the upstream part of the cavity product part 18. It is suppressed.
  • the temperature of the molten metal in the entire area of the cavity product portion 18 including the downstream portion of the cavity product portion 18 can be maintained at a relatively high temperature.
  • This FIG. 22 teaches that the possibility of casting defects can be reduced by arranging a heat source in the upstream portion of the cavity product portion 18 and the runner 20 located upstream of the cavity product portion 18.
  • FIG. 23 shows that when the heat source (second partial sand mold 42 (FIG. 13)) is installed on the side of the cavity product portion 18 where casting defects are likely to occur, the molten metal is contained inside the sand mold 10 (particularly the heat source). The temperature decreasing in the process of flowing through the side portion where the The molten metal thrown into the sand mold 10 is suppressed by the heat source (second partial sand mold 42) disposed on the side of the cavity product portion 18 to lower the temperature of the molten metal flowing on the side. Accordingly, it is possible to improve the flow of the molten metal by maintaining the temperature of the molten metal at the side portion where the casting defect of the cavity product portion 18 is likely to occur at a relatively high temperature.
  • FIG. 23 teaches that the possibility of occurrence of casting defects can be reduced by arranging a heat source in a portion of the cavity product portion 18 where casting defects are likely to occur.
  • FIG. 24 shows the heat source (the third partial sand mold 44 (FIG. 14) installed in the recess in the downstream portion of the cavity product portion 18 and cast the molten metal inside the sand mold 10 (particularly the side on which the heat source is disposed).
  • the temperature that decreases in the process of flowing through the part) is indicated by a two-dot chain line, and the molten metal charged into the sand mold 10 is affected by a heat source (third partial sand mold 44) disposed in a recess in the downstream part of the cavity product part 18.
  • the temperature drop of the molten metal flowing in the downstream portion is suppressed, which corresponds to the casting conditions (IX) and (X) shown in Fig. 19.
  • the resulting test pieces Tp (9) and Tp (10) are cast. Since defects were observed, the casting defect suppression effect by the heat source (third partial sand mold 44) disposed in the recess in the downstream portion of the cavity product portion 18 is limited and local.
  • FIG. 25 shows two temperatures at which the molten metal decreases in the course of flowing through the sand mold 10 (particularly the side where the heat source is arranged) when a heat source is installed in the recess in the downstream portion of the runner 20 and cast. Shown with a chain line.
  • the molten metal thrown into the sand mold 10 is restrained from lowering the temperature of the molten metal flowing in the downstream portion of the runner 20 by the heat source disposed in the downstream portion of the runner 20, and the molten metal in each part of the cavity product portion 18.
  • the temperature can be kept relatively high.
  • a heat source (heated partial sand mold) in the downstream portion of the runner 20.
  • a heat source may be disposed in the entire flow direction of the runner 20, or a heat source (heated partial sand mold) may be disposed in the upstream or middle portion of the runway 20 in the flow direction. .
  • FIG. 26 is a two-dot chain line that shows the temperature that decreases when the molten metal flows in the sand mold 10 when a heat source (heated partial sand mold) is installed in the recess in the upstream portion of the cavity product portion 18 and cast. Show. The temperature of the molten metal flowing into the cavity product portion 18 is suppressed by the heat source (heated partial sand mold) disposed in the upstream portion of the cavity product portion 18, so that the temperature of the molten metal throughout the cavity product portion 18 is reduced. Can be maintained at a relatively high temperature. FIG. 26 teaches that the possibility of casting defects can be reduced by arranging a heat source (heated partial sand mold) in the upstream portion of the cavity product portion 18.
  • Fig. 27 shows a reference example.
  • sand mold 100 is composed of main mold 102 and core 104
  • main mold 102 is composed of upper mold 106 and lower mold 108.
  • the aggregate of the main mold 102 and the core 104 may be either natural sand or artificial sand, or synthetic sand obtained by mixing these.
  • the aggregates that can be used are listed below. That is, at least one type of cast sand selected from the group consisting of quartz sand, mullite, synthetic mullite, alumina, quartz, zircon, fused silica, silica flour, chamotte and synthetic chamotte can be used as the aggregate.
  • the binder added to the aggregate may be either an organic or inorganic binder.
  • FIG. 27 shows an example of casting using the heated main mold 102.
  • the master mold 102 is typically shaped using an organic binder. In this case, casting is performed with the main mold 102 heated to a temperature of about 200 to about 300 ° C.
  • the main mold 102 may be heated in a heating furnace or by blowing hot air into the main mold 102.
  • the sand mold formed using the hybrid binder (XP alcohol solution) described above is conventionally hot cast using a sand mold having a temperature of 1000 ° C. or higher.
  • the main mold 102 formed using the hybrid binder may be fired and then cast using the main mold 102 at a temperature of about 350 ° C. to about 800 ° C.
  • FIG. 27 shows an example of casting using a heated core 104.
  • the binder of the core 104 may be an organic or inorganic binder, or the hybrid binder (XP alcohol solution) described above.
  • the strength can be maintained up to a temperature of 1000 ° C. or higher, and therefore, for example, about 350 ° C. to about 1100 ° C., preferably about 350 ° C. to about 1000 ° C., more preferably about 350 ° C. to about 800 ° C. Casting may be performed using the child 104.
  • the temperature of the core 104 is merely an example. What is necessary is just to determine the temperature which can prevent a casting defect according to the metal and product shape to apply based on experiment.
  • the core 104 When the core 104 is formed using an organic binder, for example, the core 104 may be cast using the core 104 of about 200 ° C., about 250 ° C., about 300 ° C., or about 350 ° C. This temperature is merely exemplary. What is necessary is just to determine the temperature which can prevent a casting defect according to the metal and product shape to apply based on experiment. Moreover, what is necessary is just to determine the temperature which can maintain fixed intensity
  • FIG. 28 shows an example in which the heated partial sand mold 120 is installed on the upper mold 106.
  • the runway 20 is illustrated as an example of the installation location of the partial sand mold 120, the installation location and the number of the partial sand mold 120 are arbitrary, and the molten metal can be smoothly distributed throughout the cavity product portion 18. An effective location may be determined by experiment.
  • FIG. 29 shows an example in which the heated partial sand mold 120 is installed in the recess of the lower mold 108 facing the runner 20.
  • the partial sand mold 120 installed in the lower mold 108 is exposed to the runner 20 and forms a cavity surface that defines the runner 20.
  • FIG. 29 shows an example in which the heated partial sand mold 120 is installed in a recess in the upstream portion of the cavity product portion 18, and the partial sand mold 120 is exposed to the cavity product portion 18 to define the cavity product portion 18.
  • a cavity surface is formed.
  • FIG. 30 shows an example in which the heated partial sand mold 120 is installed on the upper mold 106 and the lower mold 108.
  • a recess facing the runner 20 is exemplarily shown as an installation location of the partial sand mold 120, the installation location is arbitrary, and it is effective to smoothly spread the molten metal throughout the cavity product portion 18. The appropriate place may be determined by experiment.
  • the partial sand molds 120 installed on the upper mold 106 and the lower mold 108 are exposed on the runner 20 and form a cavity surface that defines the runner 20.
  • FIG. 30 shows an example in which a partial sand mold 120 is installed on the core 104.
  • the partial sand mold 120 installed on the core 104 is exposed to the cavity product portion 18.
  • the partial sand mold 120 installed in the core 104 may be singular or plural.
  • FIG. 31 shows an example in which the heated partial sand mold 120 is installed in the recess in the upstream portion of the cavity product part 18 and in the recess in the core 104.
  • FIG. 32 shows an example in which a heated partial sand mold 120 extending from the upstream part to the downstream part of the cavity product part 18 is installed in the recess of the lower mold 108.
  • FIG. 32 shows an example in which the heated partial sand mold 120 is installed in the recess of the core 104.
  • the location and number of partial sand molds 120 are not limited to the examples shown in FIGS. What is necessary is just to determine the place where it is effective to distribute the molten metal smoothly throughout the cavity product portion 18 by experiment.
  • the aggregate and binder of the partial sand mold 120 may be arbitrarily selected.
  • the partial sand mold 120 may be formed using coated sand prepared by mixing aggregate and binder, or the binder may be coated after the partial sand mold 120 is formed.
  • the binder may be a binder that can maintain the sand-type strength even at an extremely high temperature, such as a hybrid binder (XP alcohol solution).
  • a hybrid binder XP alcohol solution
  • the combinations of the heated main mold 102, the heated core 104, and the heated partial sand mold 120 are listed as an example as follows.
  • the main mold 102 is heated. Typically, in the case of the main mold 102 formed using an organic binder, casting is performed using the main mold 102 at about 200 ° C. to about 350 ° C., preferably about 200 ° C. to about 300 ° C. In the case of the main mold 102 formed using a hybrid binder, casting is performed using the main mold 102 at about 350 ° C. to about 800 ° C.
  • casting is performed using the core 104 of about 200 ° C. to about 350 ° C., preferably about 200 ° C. to about 300 ° C.
  • the core is cast using a core of about 350 ° C. to about 800 ° C. after firing.
  • the temperature of the main mold 102 can be selected from about 200 ° C. to about 350 ° C., preferably about 200 ° C. to about 300 ° C. (for organic binders) or about 350 ° C. to about 800 ° C. (for hybrid binders).
  • the core 104 is about 200 ° C. to about 350 ° C., preferably about 200 ° C. to about 300 ° C. (for organic binders) or about 350 ° C. to about 1100 ° C., preferably about 350 ° C. to about 300 ° C. for hybrid binders. 1000 ° C., more preferably about 350 ° C. to about 800 ° C. can be selected.
  • the heated partial sand mold 120 is incorporated into the main mold 102 and cast.
  • a normal mold 102 at room temperature may be used, or a heated main mold 102 may be used.
  • Typical temperature of the heated main mold 102 is about 200 ° C. to about 350 ° C., preferably about 200 ° C. to about 300 ° C.
  • the temperature of the partial sand mold 120 may be about 200 ° C. to about 350 ° C., preferably about 200 ° C. to about 300 ° C. (in the case of an organic binder), or higher (eg, about 350 ° C. to about 1100 ° C.). , Preferably about 350 ° C. to about 800 ° C.) (in the case of a hybrid binder).
  • the heated partial sand mold 120 is incorporated into the main mold 102 and cast.
  • the main mold 102 at room temperature may be used, or the main mold 102 at about 200 ° C. to about 350 ° C., preferably about 200 ° C. to about 300 ° C. or for example about 350 ° C. to about 800 ° C. may be used.
  • the temperature of the partial sand mold 120 may be about 200 ° C. to about 350 ° C., preferably about 200 ° C. to about 300 ° C. (in the case of an organic binder), or higher (eg, about 350 ° C. to about 800 ° C.). ) (In the case of a hybrid binder).
  • the core 104 of about 200 ° C. to about 350 ° C., preferably about 200 ° C. to about 300 ° C. or about 350 ° C. to about 1100 ° C. (preferably about 350 ° C. to about 800 ° C.) And casting.
  • the main material (aggregate and binder) and temperature, the core material and temperature, the partial sand mold material and temperature incorporated into the main mold, the partial sand mold material and temperature incorporated into the core. are optional, and combinations thereof are also optional.
  • the material and temperature of the main mold, the material and temperature of the partial sand mold, and the like may be selected in a category that can smooth the metal flow in the cavity product portion and suppress the occurrence of casting defects.
  • the temperature of the main mold, core, and partial sand mold may be determined within a range in which a certain strength can be maintained by actually testing the adopted aggregate and binder. Further, by selecting a simple shape as the partial sand mold, the required strength (bending strength) can be suppressed to a relatively small value.
  • the present invention can be widely applied to metal casting.
  • it is possible to suppress the occurrence of casting defects even when the temperature of the molten metal is relatively low.
  • the present invention is effective in suppressing casting defects of metals with poor molten metal fluidity.
  • mass production of a thin product having a thickness of 2 mm or less can be realized.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mold Materials And Core Materials (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)

Abstract

[Problème] L'invention a pour objet de créer un produit de coulée relativement mince suite à des procédés de coulée par gravité et en utilisant un métal à flux en fusion relativement médiocre. [Solution] L'invention concerne un moule en sable ayant : un évidement (30) formé dans un moule principal (12, 14) et ouvert sur une cavité de moule principal (12, 14) ; et un moule partiel en sable (40) en mesure d'être attaché et détaché dans l'évidement (30). Le moule partiel en sable (40) est réglé à une température de 200°C ou plus, et le moule partiel en sable (40) est disposé dans l'évidement (30) du moule principal à une température de 200°C ou plus et la coulée est effectuée.
PCT/JP2014/057416 2013-03-19 2014-03-18 Procédé de moulage en sable WO2014148516A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP14769379.0A EP2977125B1 (fr) 2013-03-19 2014-03-18 Procédé de moulage en sable

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2013057386A JP5347077B1 (ja) 2013-03-19 2013-03-19 砂型鋳造方法
JP2013-057386 2013-03-19

Publications (1)

Publication Number Publication Date
WO2014148516A1 true WO2014148516A1 (fr) 2014-09-25

Family

ID=49764904

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2014/057416 WO2014148516A1 (fr) 2013-03-19 2014-03-18 Procédé de moulage en sable

Country Status (3)

Country Link
EP (1) EP2977125B1 (fr)
JP (1) JP5347077B1 (fr)
WO (1) WO2014148516A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6214266B2 (ja) * 2013-07-29 2017-10-18 テクノメタル株式会社 砂型鋳造方法
CN106563772A (zh) * 2016-11-10 2017-04-19 安徽龙氏机械制造有限公司 一种复杂铸件铸造砂型

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56500681A (fr) * 1979-06-14 1981-05-21
JPH02160163A (ja) * 1988-12-13 1990-06-20 Toyota Motor Corp アルミニウム合金部材の鋳造方法
JPH03133538A (ja) * 1989-10-18 1991-06-06 Hitachi Metals Ltd 薄肉ステンレス鋳物の鋳造法
JPH0790502A (ja) 1993-09-24 1995-04-04 Toyota Motor Corp オーステナイト系耐熱鋳鋼
JPH08332547A (ja) * 1995-06-09 1996-12-17 Juki Corp 鋳造方法と鋳型およびその製造方法
JP3139918B2 (ja) 1993-12-28 2001-03-05 株式会社キャディック・テクノロジ−・サ−ビス 耐火物成形品の製造方法および耐火物成形品用バインダ
JP2002143983A (ja) 2000-11-10 2002-05-21 Kiyadeitsuku Technol Service:Kk 鋳造方法
JP2010042985A (ja) 2008-07-18 2010-02-25 Nobuyoshi Sasaki アルカリ金属の反応性を維持する組成物、その製造方法、およびその用途
WO2011154561A1 (fr) * 2010-06-08 2011-12-15 Iberia Ashland Chemical, S.A. Procédé permettant d'obtenir une pièce métallique
JP2012035269A (ja) 2010-08-03 2012-02-23 Nobuyoshi Sasaki 高温鋳型を用いた鋳造方法

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000176601A (ja) * 1998-12-17 2000-06-27 Nippon Chuzo Kk 鋳造品の製造方法
JP3383881B2 (ja) * 2000-06-05 2003-03-10 公朋 細山 砂型による薄肉複雑形状製品の鋳造方法の砂型表面加熱装置
JP4776953B2 (ja) * 2005-03-16 2011-09-21 花王株式会社 鋳物の製造方法
JP2007030039A (ja) * 2005-07-29 2007-02-08 Nobuyoshi Sasaki 耐熱性粒状セル被覆層の形成方法

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56500681A (fr) * 1979-06-14 1981-05-21
JPH02160163A (ja) * 1988-12-13 1990-06-20 Toyota Motor Corp アルミニウム合金部材の鋳造方法
JPH03133538A (ja) * 1989-10-18 1991-06-06 Hitachi Metals Ltd 薄肉ステンレス鋳物の鋳造法
JPH0790502A (ja) 1993-09-24 1995-04-04 Toyota Motor Corp オーステナイト系耐熱鋳鋼
JP3139918B2 (ja) 1993-12-28 2001-03-05 株式会社キャディック・テクノロジ−・サ−ビス 耐火物成形品の製造方法および耐火物成形品用バインダ
JPH08332547A (ja) * 1995-06-09 1996-12-17 Juki Corp 鋳造方法と鋳型およびその製造方法
JP2002143983A (ja) 2000-11-10 2002-05-21 Kiyadeitsuku Technol Service:Kk 鋳造方法
JP2010042985A (ja) 2008-07-18 2010-02-25 Nobuyoshi Sasaki アルカリ金属の反応性を維持する組成物、その製造方法、およびその用途
JP2012236230A (ja) * 2008-07-18 2012-12-06 Cadic:Kk 耐火物成型品を得る方法、および耐火物成型品
WO2011154561A1 (fr) * 2010-06-08 2011-12-15 Iberia Ashland Chemical, S.A. Procédé permettant d'obtenir une pièce métallique
JP2012035269A (ja) 2010-08-03 2012-02-23 Nobuyoshi Sasaki 高温鋳型を用いた鋳造方法

Also Published As

Publication number Publication date
JP5347077B1 (ja) 2013-11-20
EP2977125A1 (fr) 2016-01-27
EP2977125B1 (fr) 2017-10-18
EP2977125A4 (fr) 2016-09-28
JP2014180693A (ja) 2014-09-29

Similar Documents

Publication Publication Date Title
CA2783978C (fr) Melanges de fonderie contenant des sels de carbonate et utilisations de ces melanges
US9796015B2 (en) Molding sand for three dimensional laminate molding
KR102080970B1 (ko) 주조 제품의 제조 데이터 관리 방법
KR20100017588A (ko) 반응 가스 결함을 방지하기 위한 주조 주형 및 심형용 코팅 화합물
CN101480701A (zh) 一种冷热组合型芯成型工艺
JP5347077B1 (ja) 砂型鋳造方法
Anwar et al. Experimental study of inorganic foundry sand binders for mold and cast quality
JP6214266B2 (ja) 砂型鋳造方法
US20120199309A1 (en) Sand additives for molds/cores for metal casting
JP4754309B2 (ja) ダイカスト用中子
CN105517727A (zh) 消失模用涂模剂组合物
Ahmad Mehrabi et al. Sustainable Investment Casting
CN114012036B (zh) 一种舱体振动试验用动圈铸件铸造方法
Kvasha et al. Casting defect'cross hole' and methods of preventing it.
Rogers Numerical emissions prognosis for mold and core sand
TR201411865A2 (tr) Atık alfaset kalıp ve maça kumunun gri ve sfero döküm fabrikalarında kullanılan yaş kalıp kumunda yeni silis kumu yerine kullanılması.
JPS63299841A (ja) 高温焼成鋳型材

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 14769379

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

REEP Request for entry into the european phase

Ref document number: 2014769379

Country of ref document: EP

WWE Wipo information: entry into national phase

Ref document number: 2014769379

Country of ref document: EP