WO2006054346A1 - 鋳型の製造装置およびその製造方法 - Google Patents
鋳型の製造装置およびその製造方法 Download PDFInfo
- Publication number
- WO2006054346A1 WO2006054346A1 PCT/JP2004/017175 JP2004017175W WO2006054346A1 WO 2006054346 A1 WO2006054346 A1 WO 2006054346A1 JP 2004017175 W JP2004017175 W JP 2004017175W WO 2006054346 A1 WO2006054346 A1 WO 2006054346A1
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- WO
- WIPO (PCT)
- Prior art keywords
- cavity
- steam
- resin
- mold
- flow rate
- Prior art date
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/12—Treating moulds or cores, e.g. drying, hardening
Definitions
- the present invention relates to a saddle type manufacturing apparatus used for manufacturing and a manufacturing method thereof.
- a resin-coated sand obtained by coating a refractory aggregate with a binder such as a thermosetting resin is blown into the cavity of a heated mold, and the binder is thermally cured to form a saddle type.
- a method of manufacturing is known. According to this method, a high-productivity and stable quality cocoon can be produced, but the mold must be heated to a high temperature. There was a problem if poisonous substances such as ammonia gas and formaldehyde were generated along with the reaction, resulting in a worse working environment.
- Japanese Laid-Open Patent Publication No. 2000-107835 discloses a method capable of preventing a bad working environment and manufacturing a stable mold in a shorter time. Yes.
- This method is characterized in that after the resin-coated sand is filled into the mold, superheated steam is blown into the mold to instantly cure the binder, and the inner resin-coated that is not in contact with the mold. Since the heat of steam is transmitted to the sand instantaneously, even if the heating temperature of the mold is set lower than before, the vertical mold can be manufactured in a short time and the generation of toxic gas can be greatly reduced.
- the present invention has been made in view of the above problems, and its object is to provide a mold manufacturing method capable of obtaining a mold having a stable quality even when a mold having a complicated shape is manufactured while maintaining the safety of the work environment and high production efficiency. Quit.
- the vertical manufacturing apparatus of the present invention includes the following configuration:
- Steam supply means for supplying superheated steam into the cavity
- a plurality of steam discharge passages for discharging superheated steam from the cavity A plurality of steam discharge passages for discharging superheated steam from the cavity
- a flow rate adjusting means arranged in at least one of the steam discharge passages to adjust the amount of steam discharged from the cavity;
- Control means for controlling the flow rate adjusting means so that the superheated steam is uniformly filled in the cavity.
- a temperature sensor is disposed near each inlet of the steam discharge passage, and the control means adjusts the flow rate so that the temperature detected by the temperature sensor is within a predetermined temperature range.
- U prefer to control the means.
- the flow rate adjusting means includes an electromagnetic valve, and the control means controls the opening amount of the electromagnetic valve.
- the production apparatus of the present invention preferably includes a suction pump connected to at least one of the plurality of steam discharge passages, and the control means preferably controls the exhaust amount of the suction pump.
- the flow rate adjusting means includes an electromagnetic valve, a suction pump is connected to an exhaust port formed by joining a plurality of steam discharge passages at the ends, and the control means is The opening amount of the solenoid valve and the exhaust amount of the suction pump are controlled. According to this configuration, as will be described later, the object of the present invention can be achieved more effectively.
- control means controls the flow rate adjusting means based on the porosity of the resin-coated sand filled in the cavity. Since the porosity of the resin-coated sand has a large effect on the penetration of steam into the resin-coated sand filled in the cavity, control based on this parameter is effective in further improving the uniformity of temperature distribution in the cavity. It is.
- a further object of the present invention is to provide a production method for achieving the above object.
- the manufacturing method of the present invention uses the above-described manufacturing apparatus to fill a heated mold cavity with resin-coated sand obtained by coating a fireproof aggregate with a binder resin. Including the step of blowing superheated steam having a vapor pressure of 1.5-lOkgfZcm 2 into the cavity at a temperature at which the resin-coated sand can be cured or higher, and curing the resin-coated sand.
- the flow rate adjusting means is controlled by the control means so that the superheated steam is uniformly filled in the cavity.
- control parameter of the flow rate adjusting means by the control means includes at least one of the temperature in the steam discharge path and the porosity of the resin-coated sand filled in the cavity.
- FIG. 1 is a schematic view of a saddle-shaped manufacturing apparatus that works on a preferred embodiment of the present invention.
- FIG. 2A is a graph showing a narrow particle size distribution of resin-coated sand.
- FIG. 2B is a schematic diagram showing a filling state of resin-coated sand having a narrow particle size distribution.
- FIG. 3A is a graph showing a wide particle size distribution of resin-coated sand.
- FIG. 3B is a schematic view showing a filling state of resin-coated sand having a wide particle size distribution.
- the vertical manufacturing apparatus of the present embodiment includes a mold 1 having a cavity 40 having a desired shape therein, a sand supply unit 3 for supplying resin-coated sand into the cavity, and A steam supply unit 7 for supplying superheated steam into the cavity, a steam intake passage 10 for supplying superheated steam from the steam supply unit 7 into the cavity 40, and a cavity A plurality of steam discharge passages (20, 21, 22) for discharging superheated steam from the solenoid valves (30, 31, 32) arranged in each of the steam discharge passages, and the steam discharge passages at the end.
- the suction pump 5 connected to the exhaust port formed in this way and the control unit 4 that controls the electromagnetic valve and the suction pump so that the superheated steam is uniformly filled in the cavity are mainly configured.
- number 2 is a resin-coated sand filled in a cavity and coated with a binder such as a thermosetting resin on a fireproof aggregate
- number 60 is a heater for mold heating. is there.
- a surge tank may be provided on the upstream side of the suction pump as necessary.
- a metal material or a heat-resistant resin material can be used as a material constituting the mold.
- a metal material or a heat-resistant resin material can be used as a material constituting the mold.
- the mold shown in FIG. 1 can be divided into an upper mold and a lower mold, and a cavity 40 is formed inside with the upper mold and the lower mold connected.
- the sand supply unit 3 can be connected to the steam suction passage 10 by sliding on the rail 80.
- the steam suction path 10 is used as a sand supply path for injecting the resin-coated sand 2 into the cavity 40 when the sand supply unit 3 is connected.
- the steam supply unit 7 can generate steam at a temperature of 110 ° C-180 ° C, and the pressure of the steam supplied from the steam generator 70 is greatly increased.
- microwaves for steam overheating It is preferable to use microwaves for steam overheating.
- superheated steam is defined as that obtained by further heating saturated steam to a temperature higher than its saturation temperature.
- the steam pressure is 1.5-lOkgfZcm 2 and the temperature is more preferably 150-700 ° C. It is preferable to supply superheated steam at 200-600 ° C into the cavity.
- a sealing material is used for the connecting portion in order to prevent escape of superheated steam through the connecting portion. It is preferable to provide it.
- a recess where a sealing material made of foamed rubber can be placed is provided at the joint of the mold, and an air supply path for injecting air into the sealing material is provided. And are preferred.
- air is injected into the sealing material disposed in the recess through the air supply path to expand it, and the expanded foamed rubber is pressed against the connecting surface of the segment type to effectively escape the superheated steam. Can be prevented.
- vertical molds can be manufactured safely without deteriorating the surrounding work environment.
- the opening amount of each of the electromagnetic valves (31, 32, 33) as the flow rate adjusting means is based on the output of the temperature sensor (50, 51, 52) arranged near the inlet of the corresponding steam exhaust passage. Controlled by control queue 4. That is, the amount of steam drawn into each steam discharge path increases or decreases according to the opening amount of the corresponding electromagnetic valve. Therefore, a steam discharge path is provided at a location where it is difficult for steam with a complex shape to reach, and the opening of the electromagnetic valve is adjusted so that the temperature detected by the temperature sensor installed in the steam discharge path is within the desired temperature range. By controlling this, steam can be evenly distributed to every corner of the cavity.
- the porosity of the resin-coated sand 2 filled in the cavity is preferably included in the control parameter of the electromagnetic valve from the viewpoint of more uniformly filling the cavity with steam. That is, as shown in FIGS. 2A and 2B, when the particle size distribution of the resin-coated sand 2 is narrow, a relatively large gap is formed between the filled resin-coated sand particles. Becomes relatively large. In this case, the superheated steam supplied into the cavity penetrates into the resin-coated sand through these gaps, and the amount of steam discharged from the steam discharge path 20 immediately increases. As a result, the steam discharge paths 21, 22 There is a risk of reducing the amount of steam supplied to the tank.
- the operation of these electromagnetic valves is performed so as to reduce the opening amount of the electromagnetic valves arranged in the steam discharge passage 20 and to increase the opening amounts of the electromagnetic valves arranged in the steam discharge passages 21, 22. Controlled by control queue 4.
- the opening amount of the electromagnetic valve arranged in the steam discharge path 20 is slightly increased, while reaching the inlet of the steam discharge paths 21, 22
- the opening of the electromagnetic valves arranged in the steam discharge passages 21, 22 is made sufficiently large, and the operation of the electromagnetic valves and suction pumps is controlled so as to increase the displacement of the suction pumps. Controlled by unit 4.
- the mold can be produced in a safer working environment where it is not necessary to heat the mold to a high temperature, and a mold made of a heat-resistant resin material other than metal can be used. As a result, the design freedom of the mold is increased! ] And manufacturing cost can be reduced.
- the porosity of the resin-coated sand filled in the mold is obtained in advance by a preliminary experiment, and this porosity is input via an input means (not shown) provided in the control unit 4.
- the opening amount of the electromagnetic valve is defined as a numerical value measured by the following method.
- Resin-coated sand is made by coating a fireproof aggregate with a binder (binder resin) such as thermosetting resin.
- binder resin such as thermosetting resin.
- thermosetting resin include phenol resin, furan resin, and isocyanate resin. Compound, ammine polyol resin, polyether polyol resin and the like can be used.
- the mold heating temperature is preferably set to a temperature at which the resin-coated sand to be used can be cured or higher, for example, 130 ° C-200 ° C.
- superheated steam having a vapor pressure of 1.5-lOkgfZcm 2 at a temperature at which the resin-coated sand 2 can be cured or higher, preferably at a temperature of 200-600 ° C is supplied to the steam supply unit 7 Then blow into the cavity 40 of the mold 1 to cure the resin-coated sand.
- the superheated steam blown into the cavity uniformly heats the resin-coated sand in the cavity to a temperature necessary for curing, and then the cavity is also discharged through the steam discharge passage (20, 21, 22).
- the electromagnetic valve (30, 31, 32) and the suction pump 5 are controlled by the control unit 4 so that the superheated steam is uniformly filled in the cavity.
- the steam supplied into the cavity is forcibly sucked into the steam discharge passages provided at a plurality of locations, so that the steam is uniformly distributed throughout the cavity.
- the time required for the curing process of the mold can be greatly shortened, and quality variation can be suppressed to stabilize a uniform mold.
- the thermosetting resin binder is cured using superheated steam at the above temperature, generation of toxic gases such as ammonia, formaldehyde and phenol can be remarkably reduced.
- the mold made of the cured resin-coated sand is removed from the mold.
- the mold may be dried by a dryer as a subsequent process.
- the steam uniformly supplied to the entire cavity having a complicated shape is forcibly removed through the steam discharge passage, the steam is difficult to condense inside the vertical shape. Can be omitted.
- the resin-coated sand and superheated steam are introduced into the cavity through a single supply path. However, depending on the shape and size of the cavity, the resin-coated sand is supplied through a plurality of supply paths.
- superheated steam may be introduced into the cavity.
- an apparatus having three steam discharge paths has been described.
- two or four or more steam discharge paths may be provided at appropriate positions according to the shape of the cavity.
- a suction pump may be provided only at the end of a predetermined steam discharge path.
- the resin-coated sand used in this example was prepared as follows. First, a mixture of 680 parts by weight of phenol, 680 parts by weight of 37% formalin and 101 parts by weight of hexamethyltetramine is placed in a reaction vessel, heated to 70 ° C over about 60 minutes, and left as it is. The reaction was allowed to stand for hours. The obtained reaction product was dehydrated under reduced pressure to 90 ° C. at 100 Torr and then cooled to obtain a resol type phenolic resin having a soft melting point of 80 ° C.
- the apparatus shown in Fig. 1 was used for manufacturing the vertical mold.
- the resin-coated sand 2 was injected into the cavity 40 of the mold 1 heated to 160 ° C. from the sand supply unit 3 connected to the steam suction passage 10 at a pressure of 2.5 MPa.
- the sand supply unit 3 was also separated from the steam suction path 10, and the steam supply unit 7 was connected to the steam suction path 10.
- a steam generator 70 generated saturated steam at 165 ° C under a pressure of 7 kgf / cm 2 , and the heater 72 was used to superheat the saturated steam to obtain 400 ° C superheated steam.
- the superheated steam was supplied into the cavity 40 of the mold 1 filled with resin-coated sand for 10, 20, and 30 seconds to produce a vertical mold.
- the cavity shape is the same, but the solenoid valve, suction pump, And the control unit was used to manufacture a mold using a special dredge apparatus.
- Table 1 shows the temperature near the inlet of each steam discharge channel (20, 21, 22) and the evaluation results of the vertical molds taken out of the mold force. As the evaluation criteria for the vertical shape, “ ⁇ ” indicates that the vertical shape is good, “ ⁇ ” indicates that a portion of the vertical shape has an uncured part, and “X” indicates that the vertical shape cannot be used. It is shown that.
- Embodiments 1 to 3 the temperature of the steam discharge passage is relatively uniform, the steam supply time is short! Even in this case, the inside of the cavity can be heated uniformly, and the quality is stable. The mold could be manufactured.
- Comparative Examples 1 and 3 the suction of steam to the steam discharge path is not controlled, so the steam supply time when the temperature near the inlets of the steam discharge paths 21 and 22 is low should be lengthened. Although there was some improvement in quality, when the steam supply time was short, a vertical defect occurred due to the uneven temperature distribution in the cavity.
- the result of this example shows that a saddle shape having a complicated shape can be stably manufactured by supplying steam for a short time.
- Resin-coated sand was prepared in the same manner as in Examples 1 to 3 except that Jumin 90 was used instead of the flattery sand used in Examples 1 and 3. This resin coated sand had a porosity of 37%. Using this resin-coated sand, a bowl was produced in the same manner as in Examples 1-3. Similarly, using this resin-coated sand, a saddle type was produced in the same manner as in Comparative Examples 1-3. The results are shown in Table 2.
- Example 4 10 108 107 106 ⁇ Example 5 20 118 113 113 ⁇ Example 6 30 125 122 123 o Comparative Example 4 10 114 85 87 X Comparative Example 5 20 123 89 91 X Comparative Example 6 30 131 93 94 X
- the temperature of the steam discharge passage can be controlled relatively uniformly so that the inside of the cavity can be heated uniformly. Therefore, even though resin-coated sand having a lower porosity is used, It was possible to produce a bowl with stable quality.
- Comparative Examples 4 and 6 the temperature distribution in the cavity becomes non-uniform due to the decrease in the porosity of the resin-coated sand, and even if the supply time is the longest, the steam discharge paths 21, 22 The temperature in the vicinity could not be raised sufficiently, and as a result, it was impossible to produce a saddle that could be used within the steam supply time adopted this time.
- the present invention can uniformly cure the resin-coated sand in the mold by increasing the amount of superheated steam supplied to the complicated part when manufacturing a saddle with a complicated shape. There is a special effect.
- the Japanese Patent Publication the Japanese Patent Publication
Abstract
Description
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Priority Applications (8)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2004/017175 WO2006054346A1 (ja) | 2004-11-18 | 2004-11-18 | 鋳型の製造装置およびその製造方法 |
CA2588049A CA2588049C (en) | 2004-11-18 | 2004-11-18 | Apparatus and method for producing casting mold |
JP2006544736A JP4691043B2 (ja) | 2004-11-18 | 2004-11-18 | 鋳型の製造装置およびその製造方法 |
EP04822663A EP1815924B1 (en) | 2004-11-18 | 2004-11-18 | Mold production apparatus and method |
DE602004026648T DE602004026648D1 (de) | 2004-11-18 | 2004-11-18 | Formwerkzeugherstellungsvorrichtung und -verfahren |
US11/667,776 US7784524B2 (en) | 2004-11-18 | 2004-11-18 | Apparatus and method for producing casting mold |
AT04822663T ATE464137T1 (de) | 2004-11-18 | 2004-11-18 | Formwerkzeugherstellungsvorrichtung und - verfahren |
CNB2004800444365A CN100515601C (zh) | 2004-11-18 | 2004-11-18 | 铸造模具的制造装置及制造方法 |
Applications Claiming Priority (1)
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PCT/JP2004/017175 WO2006054346A1 (ja) | 2004-11-18 | 2004-11-18 | 鋳型の製造装置およびその製造方法 |
Publications (1)
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WO2006054346A1 true WO2006054346A1 (ja) | 2006-05-26 |
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PCT/JP2004/017175 WO2006054346A1 (ja) | 2004-11-18 | 2004-11-18 | 鋳型の製造装置およびその製造方法 |
Country Status (8)
Country | Link |
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US (1) | US7784524B2 (ja) |
EP (1) | EP1815924B1 (ja) |
JP (1) | JP4691043B2 (ja) |
CN (1) | CN100515601C (ja) |
AT (1) | ATE464137T1 (ja) |
CA (1) | CA2588049C (ja) |
DE (1) | DE602004026648D1 (ja) |
WO (1) | WO2006054346A1 (ja) |
Cited By (6)
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JP2008149364A (ja) * | 2006-12-20 | 2008-07-03 | Maeda Sheru Service:Kk | 鋳型造型システム |
JP2009029041A (ja) * | 2007-07-27 | 2009-02-12 | Lignyte Co Ltd | 耐火物の製造方法及び耐火物 |
JP2009090334A (ja) * | 2007-10-09 | 2009-04-30 | Lignyte Co Ltd | 鋳型の製造方法 |
JP2012135953A (ja) * | 2010-12-27 | 2012-07-19 | Lignyte Co Ltd | 耐火物及び耐火物の製造方法 |
WO2015004695A1 (ja) * | 2013-07-10 | 2015-01-15 | リグナイト株式会社 | 鋳型の製造装置 |
JP2020501916A (ja) * | 2016-12-20 | 2020-01-23 | ロラメンディ,エセ.クープ. | 砂中子製造装置および方法 |
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WO2007132669A1 (ja) * | 2006-05-16 | 2007-11-22 | Lignyte Co., Ltd. | 鋳型の製造装置及び鋳型の製造方法 |
JP5562743B2 (ja) * | 2010-07-05 | 2014-07-30 | 旭有機材工業株式会社 | 鋳造用鋳型の製造方法 |
US10675674B2 (en) | 2016-06-13 | 2020-06-09 | Korea Institute Of Machinery & Materials | Casting mold for metal sheet |
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CN110686914A (zh) * | 2019-10-16 | 2020-01-14 | 美利林科技有限公司 | 一种生产设备自检装置 |
CN110744005B (zh) * | 2019-12-09 | 2021-01-29 | 安徽省含山县富坤铸造厂 | 一种精密铸造型腔内涂料层的烘干装置 |
CN113333683A (zh) * | 2021-05-21 | 2021-09-03 | 共享智能铸造产业创新中心有限公司 | 铸型型腔的烘干装置及烘干方法 |
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2004
- 2004-11-18 JP JP2006544736A patent/JP4691043B2/ja active Active
- 2004-11-18 CA CA2588049A patent/CA2588049C/en active Active
- 2004-11-18 AT AT04822663T patent/ATE464137T1/de not_active IP Right Cessation
- 2004-11-18 EP EP04822663A patent/EP1815924B1/en active Active
- 2004-11-18 US US11/667,776 patent/US7784524B2/en active Active
- 2004-11-18 WO PCT/JP2004/017175 patent/WO2006054346A1/ja active Application Filing
- 2004-11-18 DE DE602004026648T patent/DE602004026648D1/de active Active
- 2004-11-18 CN CNB2004800444365A patent/CN100515601C/zh active Active
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JPS57109544A (en) * | 1980-12-27 | 1982-07-08 | Sintokogio Ltd | Method and apparatus for molding mold |
JP2000107835A (ja) * | 1998-08-07 | 2000-04-18 | Lignyte Co Ltd | 鋳型の製造方法 |
JP2000061583A (ja) * | 1998-08-25 | 2000-02-29 | Lignyte Co Ltd | 鋳型の製造方法 |
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Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008149364A (ja) * | 2006-12-20 | 2008-07-03 | Maeda Sheru Service:Kk | 鋳型造型システム |
JP2009029041A (ja) * | 2007-07-27 | 2009-02-12 | Lignyte Co Ltd | 耐火物の製造方法及び耐火物 |
JP2009090334A (ja) * | 2007-10-09 | 2009-04-30 | Lignyte Co Ltd | 鋳型の製造方法 |
JP2012135953A (ja) * | 2010-12-27 | 2012-07-19 | Lignyte Co Ltd | 耐火物及び耐火物の製造方法 |
WO2015004695A1 (ja) * | 2013-07-10 | 2015-01-15 | リグナイト株式会社 | 鋳型の製造装置 |
JPWO2015004695A1 (ja) * | 2013-07-10 | 2017-02-23 | リグナイト株式会社 | 鋳型の製造装置 |
US9827609B2 (en) | 2013-07-10 | 2017-11-28 | Lignyte Co., Ltd. | Cast mold fabrication device |
JP2020501916A (ja) * | 2016-12-20 | 2020-01-23 | ロラメンディ,エセ.クープ. | 砂中子製造装置および方法 |
JP7033800B2 (ja) | 2016-12-20 | 2022-03-11 | ロラメンディ,エセ.クープ. | 砂中子製造装置および方法 |
Also Published As
Publication number | Publication date |
---|---|
ATE464137T1 (de) | 2010-04-15 |
EP1815924A1 (en) | 2007-08-08 |
CA2588049C (en) | 2010-05-25 |
JPWO2006054346A1 (ja) | 2008-05-29 |
EP1815924A4 (en) | 2007-11-14 |
US7784524B2 (en) | 2010-08-31 |
CN100515601C (zh) | 2009-07-22 |
JP4691043B2 (ja) | 2011-06-01 |
DE602004026648D1 (de) | 2010-05-27 |
CA2588049A1 (en) | 2006-05-26 |
EP1815924B1 (en) | 2010-04-14 |
CN101060950A (zh) | 2007-10-24 |
US20080078523A1 (en) | 2008-04-03 |
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