WO2006067990A1 - 消失模型鋳造法による鋳物の製造方法 - Google Patents
消失模型鋳造法による鋳物の製造方法 Download PDFInfo
- Publication number
- WO2006067990A1 WO2006067990A1 PCT/JP2005/022785 JP2005022785W WO2006067990A1 WO 2006067990 A1 WO2006067990 A1 WO 2006067990A1 JP 2005022785 W JP2005022785 W JP 2005022785W WO 2006067990 A1 WO2006067990 A1 WO 2006067990A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- producing
- mold
- pouring
- model
- bowl
- Prior art date
Links
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
- B22C9/04—Use of lost patterns
- B22C9/046—Use of patterns which are eliminated by the liquid metal in the mould
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D23/00—Casting processes not provided for in groups B22D1/00 - B22D21/00
-
- 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
- B22C9/03—Sand moulds or like moulds for shaped castings formed by vacuum-sealed moulding
Definitions
- the present invention relates to a method for manufacturing pig iron sword such as rat pig iron, ductile pig iron, etc., and more specifically, using a disappearance model to improve the quality of the sword and improve the production efficiency. It provides a method for producing freight.
- a coating mold is applied to the outer surface of the foamed resin model, and this is used as a product mold.
- molten metal is supplied to the hot water tray, the foamed resin is decomposed and gasified by the heat of the molten metal, and the molten metal advances to the runway and reaches the foamed resin model.
- the molten metal decomposes and gasifies this foamed resin model by heat, fills the space where the foamed resin model existed, and solidifies to produce a product.
- a material using a sand containing a binder such as furan sesame is generally called a full mold forging method.
- a full mold forging method a material using a sand containing a binder such as furan sesame.
- the lost foam forging method is a material using a sand containing a binder such as furan sesame.
- the forging method using the disappearance model is adopted as a method for forging water pipes and the like because the cost of the forging equipment is low.
- the lost foam method is used without using a binder, there is also an advantage that there is little waste sand.
- the present invention has been made to overcome the above-described problems of the prior art, and in the pot manufacturing method using the disappearance model, the pouring of the hot water during pouring is not impaired. It is an object of the present invention to provide a method for producing a high-quality porcelain product that is free from defects such as “sinks” and “baths” and “gas defects” by lowering the hot water temperature.
- a method for producing a product with high productivity is provided by shortening the cooling time of the product, repeatedly using the product sand, improving the yield of the molten metal, and improving the production efficiency of the mold. This is an issue.
- the step of decompressing the mold in the method for producing a fried article by the disappearance model forging method according to claim 1 is provided below the mold and connected to the mold.
- a method for manufacturing a container having a configuration achieved by reducing the pressure in the air passage provided with a through hole was adopted.
- the step of pressurizing the mold further after the step of depressurizing the mold. These steps are achieved by depressurizing and pressurizing the inside of the air passage.
- the pressure in the step of decompressing the saddle is set to 0.03 Mpa. It was set as the structure which is a vacuum pressure of 0.05 Mpa.
- the step of depressurizing the mold from the start of pouring is performed according to the method for producing a soot by the disappearance model forging method described in claim 3 or 4.
- the construction was such that the step of pressurizing the mold was continued until the completion of pouring until the temperature of the pouring was lowered to the ferrite-pearlite transformation temperature.
- the saddle mold should not use a binder in the method for producing a soot by the disappearance model forging method described in any of claims 1 to 5.
- the composition was formed from sand.
- the material of the foam model is PMMA, and the foam The magnification was 40 to 50 times.
- the foamed model integrates the runner, the weir, and the product part. Molded one, or part of these parts, and then integrated by bonding
- a method for producing a highly productive product is provided by shortening the cooling time of the product, repeatedly using the material sand, improving the yield of molten metal, and improving the production efficiency of the metal mold. thing Is possible.
- the hot water temperature when pouring into the bowl greatly affects the quality of the final product and the manufacturing cost.
- the temperature of the molten metal when pouring is determined by the amount of heat shrinkage and flow of the molten metal This is a factor that affects the power, the extent to which the foamed model decomposes and disappears, and the power energy required for melting.
- the semi-solid state is a process in which pig iron changes its state from a liquid phase to a solid phase, and is a state in which cementite as a liquid phase portion and martensite as a solid phase portion are mixed.
- the pouring temperature is controlled to be lowered to the transition temperature of the semi-solid state, and low-temperature pouring is performed. It is important to take measures to prevent the harmful effects of hot water.
- Table 1 shows the results of this pouring test.
- Fig. 2 is an enlarged photograph of the microstructure of the obtained test piece under a microscope, and is a micrograph of the test piece in a semi-solid state.
- the circles in Table 1 indicate that the semi-solid state has been realized, and the X marks indicate that the semi-solid state has not been realized.
- the temperature of the molten metal to be injected was changed in the range of 1400 ° C to 1230 ° C.
- the pouring temperature was 1350 ° C or higher, the structure that was in the solid state when it dropped into the water tank was not observed.
- the pouring temperature reached 1330 ° C, a slightly solid structure was observed, and when the pouring temperature was 1300 ° C or lower and 1230 ° C or higher, liquid and solid were mixed. Tissue was observed. Therefore, it was proved that a semi-solid state can be realized by pouring hot water in the temperature range of 1230 ° C and 1330 ° C.
- the pig iron product that was prototyped is a straight pipe with a nominal diameter of 8 inches and a thickness of 3.5 mm as shown in Fig. 3 (with a weight of 5.5 kgZl), and a nominal diameter of 10 inches and a thickness of 5 mm
- Fig. 3 with a weight of 5.5 kgZl
- the foam model used for forming the saddle shape was manufactured by foaming polymethylmethacrylic resin (PMMA) and forming it into the shape of an irregular tube.
- PMMA polymethylmethacrylic resin
- the expansion ratio is too high and the specific gravity is decreased, the rigidity of the molded product will be low. As a result, it becomes easy to deform, and it becomes impossible to obtain a container product with high dimensional accuracy. Therefore, it is desirable to set the expansion ratio between 40 times and 50 times.
- a surface layer is formed by applying a coating mold on the outer surface of the molded foam model.
- This coating mold is used for the purpose of preventing the reaction between the sand and the molten metal, improving the rigidity of the foam model, and reinforcing it. Therefore, it is desirable that the coating mold to be applied has a strength of 15 KgZcm 2 or more.
- the concentration of the coating mold also affects the occurrence of gas defects in the porcelain product. In order to suppress the occurrence of gas defects, it is necessary to set the concentration to about 70 Baume.
- the foam model When making the foam model, make a foam model in the shape of the final pottery product, and make foam models such as runners, gates, hot water trays, and hot water sections separately.
- the product part and the runner, the spout, the hot water tray, the hot water feeder, etc. may be formed as a single unit, and the coating mold may be applied thereto. Alternatively, these may be formed separately, then formed into an integral shape by adhesion, and then a coating mold may be applied.
- molten metal is poured into it.
- the material of the poured metal is FCD45.
- the molten metal is filled into the bowl while the foam model is decomposed and disappeared by the heat of the molten metal.
- the gas of the decomposed foam model is discharged to the outside of the saddle shape through the inside of the sand with some air permeability.
- the molten metal filled in the saddle shape is cooled with time to change its state from a liquid phase to a solid phase.
- the method of forging the mold while reducing the pressure is different from the method of forging the mold without reducing the pressure in the process after pouring the molten metal into the mold. That is, simultaneously with pouring the molten metal into the bowl with the foam model built in, the bowl is decompressed by depressurizing the inside of the vent (2) provided below the bowl (1) as shown in FIG.
- the air passage (2) is provided with a plurality of air holes (3) for direct communication with the sand in the bowl, and one end of the air passage (2) is installed outside. Connected to a decompression device (not shown) equipped with a vacuum pump, etc.! /
- the vertical pressure reduction is preferably continued until the molten metal is solidified in order to sufficiently suck the decomposition gas and the like.
- Table 2 shows the results of molding a straight tubular deformed tube with a nominal diameter of 8 inches and a wall thickness of 3.5 mm, and a straight tubular deformed tube with a nominal diameter of 10 inches and a wall thickness of 5 mm.
- deformed pipes are formed with parameters of the pouring temperature and whether or not the pressure of the saddle is reduced when pouring, and the evaluation results of the formed deformed pipes are shown in the table.
- ⁇ , ⁇ , X The ones marked with a ⁇ mark are “baths” due to the flow of molten metal in the shaped deformed pipe. Represents a high-quality porcelain product with no gas defects due to gas entrainment,
- the tensile strength of the porcelain product is improved by depressurizing the mold during pouring, and the tensile strength is improved when pouring in a semi-solid state. There is a tendency to do this.
- the bowl (1) is depressurized in the air passage (2) provided below, and the bowl is decompressed. Continue until pouring is complete. Then, after pouring is completed, the pressure in the reduced pressure passage (2) is increased to the atmospheric pressure or higher. By doing so, air having a low temperature is sent from the air passage (2) into the void of the sand in the saddle mold, and an air flow can be formed. This air flow makes it possible to increase the cooling rate of the material. In this case, if a heat-resistant plastic film (4) is placed on the top surface of the bowl, the film (4) is removed and the pressure in the force vent (2) is changed to atmospheric pressure. It is desirable to apply pressure above. This is because air easily flows in the bowl.
- Pressurization of the air passage (2) may be performed until the porcelain is sufficiently cooled! /, But until the porcelain temperature is lowered to the ferrite pearlite transformation temperature, and thereafter The pressure in the air passage (2) may be returned to atmospheric pressure. By doing so, it becomes possible to effectively increase the cooling rate of the waste without consuming wasteful energy.
- FIG. 1 shows an outline of a test apparatus for confirming a temperature condition for establishing a semi-solid state.
- Fig. 2 shows a micrograph of the structure of a test piece that has been confirmed to be semi-solid in a test for confirming the temperature conditions under which the semi-solid state is established.
- FIG. 3 shows a photograph of a prototype pipe made of pig iron.
- FIG. 4 is a diagram showing a configuration when the saddle mold is pressurized and depressurized.
- FIG. 5 shows a comparison of the bow I tension strength of the ware product produced by the forging method with the vacuum-type decompression and the forging method without the decompression.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
- Casting Devices For Molds (AREA)
- Forging (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BRPI0519757-0A BRPI0519757A2 (pt) | 2004-12-24 | 2005-12-12 | mÉtodo para fabricaÇço de fundiÇÕes usando areia seca e um padrço de espuma como um padrço de espuma na forma "lost" |
EP05814201A EP1832359A4 (en) | 2004-12-24 | 2005-12-12 | METHOD FOR THE PRODUCTION OF CAST METAL ACCORDING TO GASES WITH LOST FORM |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004-372877 | 2004-12-24 | ||
JP2004372877A JP2006175492A (ja) | 2004-12-24 | 2004-12-24 | 消失模型鋳造法による鋳物の製造方法 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2006067990A1 true WO2006067990A1 (ja) | 2006-06-29 |
Family
ID=36601592
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2005/022785 WO2006067990A1 (ja) | 2004-12-24 | 2005-12-12 | 消失模型鋳造法による鋳物の製造方法 |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1832359A4 (ja) |
JP (1) | JP2006175492A (ja) |
KR (1) | KR20070089744A (ja) |
BR (1) | BRPI0519757A2 (ja) |
WO (1) | WO2006067990A1 (ja) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009166105A (ja) * | 2008-01-18 | 2009-07-30 | Sintokogio Ltd | 鋳物鋳造装置 |
CN104942227A (zh) * | 2015-07-15 | 2015-09-30 | 四川省井研卫东机械制造厂 | 一种用于有侧凹或内凹的大型铸件砂型的v法真空造型方法 |
CN113172201A (zh) * | 2021-04-28 | 2021-07-27 | 石家庄工业泵厂有限公司 | 副叶轮消失模串浇铸造工艺用模型簇及副叶轮消失模串浇铸造工艺 |
CN114653900A (zh) * | 2022-03-23 | 2022-06-24 | 重庆江增船舶重工有限公司 | 一种叶轮罩壳的泡沫模具的铸造工艺及造型方法 |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009190086A (ja) * | 2008-02-18 | 2009-08-27 | Kunikatsu Nakamoto | 消失模型減圧鋳造法で鋳造できない鋼種を、同工法で鋳造する方法。 |
DE202009000043U1 (de) * | 2008-07-29 | 2009-05-20 | Ivoclar Vivadent Ag | Ausbrennbare, leicht fräsbare CAD Blöcke aus Schaumkunststoff |
JP5756643B2 (ja) * | 2011-01-31 | 2015-07-29 | クロダイト工業株式会社 | 球状黒鉛鋳鉄の低温鋳造方法及び低温鋳造装置 |
CN102952992A (zh) * | 2011-08-31 | 2013-03-06 | 马鞍山市华威冶金机械有限公司 | 一种消失模铸造qt500-10的工艺方法 |
JP6284468B2 (ja) * | 2014-11-18 | 2018-02-28 | 株式会社神戸製鋼所 | 消失模型鋳造方法 |
CN104874734A (zh) * | 2015-05-06 | 2015-09-02 | 柳州科尔特锻造机械有限公司 | 一种消失模铸造方法 |
CN104874733A (zh) * | 2015-05-06 | 2015-09-02 | 柳州科尔特锻造机械有限公司 | 一种消失模铸造工艺 |
DE112017000606B4 (de) * | 2016-02-02 | 2022-11-24 | Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | Verlorenen Schaum nutzendes Giessverfahren |
CN105880469B (zh) * | 2016-05-31 | 2017-10-24 | 江苏飞鹿重工机械制造有限公司 | 一种空壳涂料生产喷嘴的方法 |
KR101988388B1 (ko) * | 2018-11-12 | 2019-06-12 | 황인출 | 풀몰드 주조방식을 이용한 주강제품 제조방법 |
KR102263466B1 (ko) | 2019-09-11 | 2021-06-09 | 이정두 | 알루미늄 소실모형주조방법 |
Citations (4)
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JPS525004A (en) | 1975-07-02 | 1977-01-14 | Hitachi Ltd | Running control device for an automatic well-pump |
JPS525004B2 (ja) * | 1971-11-26 | 1977-02-09 | ||
JPS59107763A (ja) | 1982-12-08 | 1984-06-22 | Mazda Motor Corp | 鉄系部品の製造方法 |
JPH1177235A (ja) | 1997-09-02 | 1999-03-23 | Isuzu Motors Ltd | 内燃機関用鋳鉄ピストンの製造方法 |
-
2004
- 2004-12-24 JP JP2004372877A patent/JP2006175492A/ja active Pending
-
2005
- 2005-12-12 KR KR1020077016662A patent/KR20070089744A/ko not_active Application Discontinuation
- 2005-12-12 WO PCT/JP2005/022785 patent/WO2006067990A1/ja active Application Filing
- 2005-12-12 BR BRPI0519757-0A patent/BRPI0519757A2/pt not_active Application Discontinuation
- 2005-12-12 EP EP05814201A patent/EP1832359A4/en not_active Withdrawn
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
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JPS525004B2 (ja) * | 1971-11-26 | 1977-02-09 | ||
JPS525004A (en) | 1975-07-02 | 1977-01-14 | Hitachi Ltd | Running control device for an automatic well-pump |
JPS59107763A (ja) | 1982-12-08 | 1984-06-22 | Mazda Motor Corp | 鉄系部品の製造方法 |
JPH1177235A (ja) | 1997-09-02 | 1999-03-23 | Isuzu Motors Ltd | 内燃機関用鋳鉄ピストンの製造方法 |
JP3480263B2 (ja) * | 1997-09-02 | 2003-12-15 | いすゞ自動車株式会社 | 内燃機関用鋳鉄ピストンの製造方法 |
Non-Patent Citations (1)
Title |
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See also references of EP1832359A4 * |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009166105A (ja) * | 2008-01-18 | 2009-07-30 | Sintokogio Ltd | 鋳物鋳造装置 |
CN104942227A (zh) * | 2015-07-15 | 2015-09-30 | 四川省井研卫东机械制造厂 | 一种用于有侧凹或内凹的大型铸件砂型的v法真空造型方法 |
CN104942227B (zh) * | 2015-07-15 | 2017-01-25 | 四川省井研卫东机械制造厂 | 一种用于有侧凹的大型铸件砂型的v法真空造型方法 |
CN113172201A (zh) * | 2021-04-28 | 2021-07-27 | 石家庄工业泵厂有限公司 | 副叶轮消失模串浇铸造工艺用模型簇及副叶轮消失模串浇铸造工艺 |
CN114653900A (zh) * | 2022-03-23 | 2022-06-24 | 重庆江增船舶重工有限公司 | 一种叶轮罩壳的泡沫模具的铸造工艺及造型方法 |
CN114653900B (zh) * | 2022-03-23 | 2023-12-08 | 重庆江增船舶重工有限公司 | 一种叶轮罩壳的泡沫模具的铸造工艺及造型方法 |
Also Published As
Publication number | Publication date |
---|---|
KR20070089744A (ko) | 2007-08-31 |
BRPI0519757A2 (pt) | 2009-03-10 |
JP2006175492A (ja) | 2006-07-06 |
EP1832359A4 (en) | 2009-01-21 |
EP1832359A1 (en) | 2007-09-12 |
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