US20100155009A1 - Method for making upper and lower molds and an apparatus therefor - Google Patents

Method for making upper and lower molds and an apparatus therefor Download PDF

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Publication number
US20100155009A1
US20100155009A1 US11/997,415 US99741506A US2010155009A1 US 20100155009 A1 US20100155009 A1 US 20100155009A1 US 99741506 A US99741506 A US 99741506A US 2010155009 A1 US2010155009 A1 US 2010155009A1
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US
United States
Prior art keywords
squeezing
match
plate
making
molds
Prior art date
Legal status (The legal status 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 status listed.)
Abandoned
Application number
US11/997,415
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English (en)
Inventor
Minoru Hirata
Yutaka Hadano
Tsutomu Seki
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sintokogio Ltd
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Sintokogio Ltd
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 Sintokogio Ltd filed Critical Sintokogio Ltd
Assigned to SINTOKOGIO, LTD. reassignment SINTOKOGIO, LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: HADANO, YUTAKA, HIRATA, MINORU, SEKI, TSUTOMU
Publication of US20100155009A1 publication Critical patent/US20100155009A1/en
Abandoned legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C11/00—Moulding machines characterised by the relative arrangement of the parts of same
    • B22C11/10—Moulding machines characterised by the relative arrangement of the parts of same with one or more flasks forming part of the machine, from which only the sand moulds made by compacting are removed
    • 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
    • B22C15/00—Moulding machines characterised by the compacting mechanism; Accessories therefor
    • B22C15/02—Compacting by pressing devices only
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C15/00—Moulding machines characterised by the compacting mechanism; Accessories therefor
    • B22C15/02—Compacting by pressing devices only
    • B22C15/08—Compacting by pressing devices only involving pneumatic or hydraulic mechanisms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C19/00—Components or accessories for moulding machines
    • B22C19/04—Controlling devices specially designed for moulding machines

Definitions

  • the present invention relates to a method for making upper and lower molds and an apparatus therefor.
  • Some methods for making upper and lower molds are publicly known. One of them comprises the steps of holding a match-plate between cope and drag flasks, inserting upper and lower squeezing means into the respective openings of the cope and drag flasks, which openings are opposite to the match-plate, thereby defining upper and lower molding spaces, then supplying molding sand to the upper and lower molding spaces, and causing the upper and lower squeezing means to move forward to the match-plate for squeezing the molding sand in the upper and lower molding spaces so as to make flaskless upper and lower molds (see International Publication No. WO2005/05825 A1).
  • the conventional method for making upper and lower molds may cause differences between the pressures that are applied to the upper and lower squeezing means when the squeezing means are caused to move forward to the match-plate, because of the differences of the forward speeds or pressures of upper and lower squeezing means, because of the difference of patterns of both sides of a match-plate, because of the difference of the thicknesses of the upper and lower molds, because of the difference of the densities of molding sand being filled in upper and lower molding spaces, etc.
  • the upper and lower squeezing pressures given by the driving means which pressures cause the upper and lower squeezing means to move forward, may become different, and if so, one of the pressures will become very strong. Accordingly, the method has problems such that the resulting mold may be warped, or, at worst, the match-plate may be broken.
  • This invention was created to resolve these drawbacks. Its purpose is to provide a method for making upper and lower molds and an apparatus therefor that can prevent the resulting mold from being warped and the match-plate from being broken.
  • the method for making the upper and lower molds of claim 1 comprises the steps of holding a match-plate between cope and drag flasks, inserting upper and lower squeezing means into the respective openings of the cope and drag flasks, which openings are opposite to the match-plate, thereby defining upper and lower molding spaces, then supplying molding sand to the upper and lower molding spaces, and causing the upper and lower squeezing means to move forward to the match-plate for squeezing the molding sand in the upper and lower molding spaces, wherein during the step of causing the upper and lower squeezing means to move forward to the match-plate the difference between the squeezing pressures of the upper and lower molding spaces is kept within a predetermined tolerance.
  • the apparatus for making the upper and lower molds of claim 2 is one for holding a match-plate between cope and drag flasks, inserting upper and lower squeezing means into the respective openings of the cope and drag flasks, which openings are opposite to the match-plate, thereby defining upper and lower molding spaces, then supplying molding sand to the upper and lower molding spaces, and causing the upper and lower squeezing means to move forward to the match-plate for squeezing the molding sand in the upper and lower molding spaces.
  • the apparatus comprises upper and lower driving means that cause the respective upper and lower squeezing means to move forward to, and backward from, the match-plate, upper and lower squeezing pressure-measuring means that are installed on the upper and lower driving means and that measure the respective pressures when the sand is squeezed, and a command-transmitting means that determines the difference between the values measured by the upper and lower squeezing pressure-measuring means and compares it to a predetermined tolerance. If the difference is larger than the tolerance, the command-transmitting means will send a command to the driving means so as to stop causing the driving means that has the larger pressure to move forward, until the difference falls within the predetermined tolerance.
  • the inventions that comprise the above components cause the upper and lower squeezing means to move forward to a match-plate by upper and lower driving means, to thereby squeeze the molding sand in the upper and lower molding spaces.
  • the difference between the upper and lower squeezing pressures is determined based on the result of a measurement by their upper and lower measuring means and is compared with a predetermined tolerance. If the difference is larger than the predetermined tolerance, a command-transmitting means will send a command to the driving means so as to stop causing the driving means that has the larger pressure to move forward until the difference falls within the predetermined tolerance.
  • each of the upper and lower driving means is a hydraulic cylinder with a hydraulic power unit or an electric cylinder with a power supply unit. If the driving means are hydraulic cylinders, then each of the upper and lower squeezing pressure-measuring means is a pressure sensor installed on the hydraulic power unit that measures the oil pressure, or a load cell that measures the force of the hydraulic cylinder. If they are electric cylinders with a power supply unit, then each of the measuring means is a voltmeter installed on the power supply unit that measures its voltage, or a load cell that measures the force of the electric cylinder. An ammeter may be used instead of the voltmeter.
  • the apparatus for making upper and lower molds is one that makes tight-flask upper and lower molds, or one that make flaskless upper and lower molds.
  • the method of claim 1 comprises the steps of holding a match-plate between cope and drag flasks, inserting upper and lower squeezing means into the respective openings of the cope and drag flasks, which openings are opposite to the match-plate, thereby defining upper and lower molding spaces, then supplying molding sand to the upper and lower molding spaces, and causing the upper and lower squeezing means to move forward to the match-plate for squeezing the molding sand in the upper and lower molding spaces, wherein during the step of causing the upper and lower squeezing means to move forward to the match-plate the difference between the squeezing pressures of the upper and lower molding spaces is kept within a predetermined tolerance.
  • the upper and lower squeezing means can be moved forward to the match-plate under the conditions that the upper and lower squeezing pressures are balanced, i.e., their difference being kept within a predetermined tolerance, the resulting mold can be prevented from being warped, or the match-plate can be prevented from being broken.
  • FIG. 1 is a schematic diagram of an apparatus for making the upper and lower molds of the present invention.
  • the apparatus comprises a match-plate 1 , cope and drag flasks 2 and 3 , upper and lower squeezing means 4 and 5 , hydraulic cylinders 7 and 8 with a hydraulic power unit 6 , upper and lower pressure sensors 9 and 10 , and a command-transmitting means 11 .
  • the hydraulic cylinders 7 and 8 have functions as upper and lower driving means that cause the respective upper and lower squeezing means 4 and 5 to move forward to, and backward from, the match-plate 1 .
  • the upper and lower pressure sensors 9 and 10 are installed on the hydraulic power unit 6 and have functions as upper and lower squeezing pressure-measuring means that measure the respective pressures when the sand is squeezed.
  • the command-transmitting means 11 determines the difference between the values measured by the upper and lower pressure sensors 9 and 10 and compares it to a predetermined tolerance. If the difference is larger than a predetermined tolerance, the means 11 will send a command to the hydraulic power unit 6 so as to stop causing whichever of the hydraulic cylinder 7 or 8 that has the larger pressure to move forward until the difference falls within the predetermined tolerance.
  • the hydraulic power unit 6 has two change-over valves 13 and 14 . Each valve switches an oil supply to the respective port of the hydraulic cylinders 7 and 8 , which oil is supplied from an oil pump 12 .
  • the apparatus that comprises the above components holds the match-plate 1 between the cope and drag flasks 2 and 3 . Then, the apparatus inserts the upper and lower squeezing means 4 and 5 into the respective openings of the cope and drag flasks 2 and 3 , which openings are opposite to the match-plate 1 , so as to define upper and lower molding spaces. Next, it supplies molding sand to the upper and lower molding spaces. Then, it causes the upper and lower squeezing means 4 and 5 to move forward to the match-plate 1 so as to squeeze the molding sand and make upper and lower molds.
  • the upper and lower pressure sensors 9 and 10 measure the pressures of the hydraulic cylinders 7 and 8 , and send the measured values to the command-transmitting means 11 . Then the command-transmitting means 11 determines the difference between the pressures of the hydraulic cylinders 7 and 8 . If the difference is larger than the predetermined tolerance, the means 11 will send a command to the change-over valve 13 or 14 of the hydraulic power unit 6 and change the valve position so as to stop causing whichever of the cylinder 7 or 8 that has the larger pressure to move forward until the difference falls within the tolerance.
  • the pressure of the oil in the hydraulic cylinder 7 or 8 that has the smaller pressure is increased.
  • the position of the change-over valve 13 or 14 will be changed, and whichever of the cylinder 7 or 8 that has the larger pressure will be restarted, to be moved forward.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Devices For Molds (AREA)
US11/997,415 2005-08-10 2006-08-08 Method for making upper and lower molds and an apparatus therefor Abandoned US20100155009A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2005231783 2005-08-10
JP2005-231783 2005-08-10
PCT/JP2006/315654 WO2007018207A1 (ja) 2005-08-10 2006-08-08 上・下鋳型造型方法およびその装置

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2006/315654 A-371-Of-International WO2007018207A1 (ja) 2005-08-10 2006-08-08 上・下鋳型造型方法およびその装置

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US13/647,947 Division US8567478B2 (en) 2005-08-10 2012-10-09 Method for making upper and lower molds and an apparatus therefor

Publications (1)

Publication Number Publication Date
US20100155009A1 true US20100155009A1 (en) 2010-06-24

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US11/997,415 Abandoned US20100155009A1 (en) 2005-08-10 2006-08-08 Method for making upper and lower molds and an apparatus therefor
US13/647,947 Active US8567478B2 (en) 2005-08-10 2012-10-09 Method for making upper and lower molds and an apparatus therefor

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US13/647,947 Active US8567478B2 (en) 2005-08-10 2012-10-09 Method for making upper and lower molds and an apparatus therefor

Country Status (10)

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US (2) US20100155009A1 (ko)
EP (1) EP1920860B1 (ko)
JP (1) JP4321654B2 (ko)
KR (1) KR100949623B1 (ko)
CN (1) CN101242922B (ko)
BR (1) BRPI0614740B8 (ko)
DK (1) DK1920860T3 (ko)
EA (1) EA013114B1 (ko)
ES (1) ES2428370T3 (ko)
WO (1) WO2007018207A1 (ko)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6536480B2 (ja) 2016-05-17 2019-07-03 新東工業株式会社 抜枠造型機
JP6809433B2 (ja) * 2017-10-19 2021-01-06 新東工業株式会社 抜枠造型機で造型され、型合せされた上下鋳型の型ずれの発生を低減する方法および抜枠造型ライン
LU101259B1 (en) * 2019-06-07 2020-12-07 Jml Ind Sand core boxing machine with improved electrical control

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020129917A1 (en) * 2001-03-16 2002-09-19 Sintokogio, Ltd. Method and apparatus for compacting molding sand

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2533043B1 (fr) 1982-09-15 1986-07-11 Commissariat Energie Atomique Procede et dispositif de positionnement lateral d'un organe par rapport a un joint forme entre deux surfaces metalliques et presentant des discontinuites
JPS5973148A (ja) * 1982-10-19 1984-04-25 Toyoda Autom Loom Works Ltd 無枠式鋳型造型装置
JP2798190B2 (ja) * 1991-03-01 1998-09-17 新東工業株式会社 無枠鋳型造型設備
JP2798191B2 (ja) * 1991-03-22 1998-09-17 新東工業株式会社 無枠鋳型造型設備
DK169236B1 (da) * 1993-07-20 1994-09-19 Dansk Ind Syndikat Fremgangsmåde ved fremstilling af støbeforme eller dele af sådanne ved sammenpresning af partikelmateriale samt apparat til udøvelse af fremgangsmåden
JP3164271B2 (ja) * 1994-12-09 2001-05-08 新東工業株式会社 鋳型造型装置
JP3413798B2 (ja) * 2000-01-14 2003-06-09 新東工業株式会社 枠付造型装置の造型方法及び造型システム
WO2001081025A1 (fr) * 2000-04-21 2001-11-01 Sintokogio, Ltd. Machine a mouler en matrice et support de modele
JP2002120046A (ja) * 2000-10-13 2002-04-23 Sintokogio Ltd 鋳型造型機における油圧シリンダの油圧制御装置
US6957687B2 (en) * 2001-08-06 2005-10-25 Sintokogio, Ltd. Method and system for monitoring a molding machine
JP2004066280A (ja) * 2002-08-05 2004-03-04 Metal Eng Kk 分割式スクイズフートのストローク制御装置
DE10328712A1 (de) 2003-06-25 2005-01-13 Robert Bosch Gmbh Verfahren und System zur Bestimmung des Kupplungspunktes einer mittels einer Stellvorrichtung betätigbaren Kupplung
DE10330733A1 (de) 2003-07-07 2005-02-17 Eew Maschinenbau Gmbh Rotorblatt für Windenergieanlagen
EP1837099A3 (en) * 2006-12-06 2008-01-02 Sintokogio, Ltd. Moulding machine for making an upper and a lower mould and method for operating said machine

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020129917A1 (en) * 2001-03-16 2002-09-19 Sintokogio, Ltd. Method and apparatus for compacting molding sand

Also Published As

Publication number Publication date
EP1920860B1 (en) 2013-07-31
DK1920860T3 (da) 2013-09-23
CN101242922B (zh) 2011-04-06
ES2428370T3 (es) 2013-11-07
BRPI0614740B8 (pt) 2018-12-11
EP1920860A4 (en) 2009-10-14
WO2007018207A1 (ja) 2007-02-15
JPWO2007018207A1 (ja) 2009-02-19
JP4321654B2 (ja) 2009-08-26
EA013114B1 (ru) 2010-02-26
EP1920860A1 (en) 2008-05-14
KR20080033504A (ko) 2008-04-16
BRPI0614740A2 (pt) 2011-04-12
US8567478B2 (en) 2013-10-29
CN101242922A (zh) 2008-08-13
US20130118703A1 (en) 2013-05-16
BRPI0614740B1 (pt) 2016-09-27
KR100949623B1 (ko) 2010-03-26
EA200800559A1 (ru) 2008-06-30

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AS Assignment

Owner name: SINTOKOGIO, LTD.,JAPAN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:HIRATA, MINORU;HADANO, YUTAKA;SEKI, TSUTOMU;REEL/FRAME:024048/0794

Effective date: 20080207

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION