US20080169075A1 - Molding machine and molding method - Google Patents

Molding machine and molding method Download PDF

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Publication number
US20080169075A1
US20080169075A1 US11/822,578 US82257807A US2008169075A1 US 20080169075 A1 US20080169075 A1 US 20080169075A1 US 82257807 A US82257807 A US 82257807A US 2008169075 A1 US2008169075 A1 US 2008169075A1
Authority
US
United States
Prior art keywords
flask
match plate
cope
molding
drag
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
US11/822,578
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English (en)
Inventor
Minoru Hirata
Takayuki Komiyama
Toshihiko Oya
Tsuyoshi Sakai
Koichi Sakaguchi
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
Original Assignee
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: HIRATA, MINORU, KOMIYAMA, TAKAYUKI, OYA, TOSHIHIKO, SAKAGUCHI, KOICHI, SAKAI, TSUYOSHI
Publication of US20080169075A1 publication Critical patent/US20080169075A1/en
Abandoned legal-status Critical Current

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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
    • B22C11/00—Moulding machines characterised by the relative arrangement of the parts of same
    • 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
    • B22C21/00—Flasks; Accessories therefor
    • B22C21/02—Sectional flasks, i.e. with divided, articulated, or interchangeable side sections

Definitions

  • This invention relates to a molding machine and molding method, and, more particularly, it relates to a match-plate molding machine and a molding method using a match plate.
  • WO2005/058528 A1 One example of conventional match plate molding machines for molding upper and lower molds at the same time is disclosed in WO2005/058528 A1.
  • a match plate is sandwiched and held between a cope flask and a drag flask.
  • Upper and lower squeeze members are then inserted into the respective flasks through their openings opposed to the match plate such that upper and lower molding spaces are defined.
  • the defined molding spaces are then filled with molding sand.
  • the upper and lower squeeze members are then moved to the match plate to squeeze the molding sand within the molding spaces to mold upper and lower molds.
  • the cope and drag flasks which contain the corresponding upper and lower molds, are then removed from the match plate. These removing procedures are achieved with cylinders that reciprocatingly move the cope and drag flasks relative to the match plate.
  • the inconvenience of such a conventional molding machine is that the procedures for removing the cope and drag flasks from the match plate start when the match plate adheres to either the upper mold or the lower mold. That is, if the match plate adheres to either mold, first, the other mold (i.e., the mold that doesn't adhere to the match plate) and the corresponding flask that contains the other mold, are removed (i.e., stripped) from the match plate in unison (the first stripping). Then one mold (i.e., the mold that adheres to the match plate), and the corresponding flask that contains that one mold, are then removed from the match plate in unison (the second stripping). The first stripping is to be begun when the other mold is stationary.
  • the second stripping should, however, be done when the moving match plate, which is moved immediately just before this point, is stopped, while the mold (the one mold) that is adhered to the match plate is still moving. Because of this, the one mold may receive a significant impact when it is removed from the match plate. Thus the second stripping may cause a defect.
  • one object of the present invention is to provide a molding machine and molding method that prevent any defect in a mold that is adhered to a match plate when it, and the corresponding flask that contains the mold, are removed from the match plate.
  • a molding method includes the steps of holding a match plate between a cope flask and a drag flask; inserting an upper squeeze member and a lower squeeze member into the opening of the cope and drag flasks opposed to the match plate to define an upper molding space and a lower molding space, respectively; filling the defined molding space with molding sand; and driving the upper and lower squeeze members toward the match plate to squeeze the molding sand within the upper and lower molding space to mold an upper mold and a lower mold at the same time.
  • the method is characterized in that it further comprises the step of: forcibly pushing away the cope and drag flasks that contain the molded upper and lower molds from the match plate at the same time when the flasks are stationary.
  • the velocity at which the cope flask is separated from the drag flask is twice that when the match plate is separated from the drag flask, and preferably the velocity at which the cope flask is separated from the match plate is the same as that when the drag flask is separated from the match plate.
  • a match-plate molding machine in another aspect of the present invention, includes: a cope flask and a drag flask; a match plate to be held between them; an upper squeeze member and a lower squeeze member that are insertable into openings of the cope and drag flasks, and which are opposed to the match plate; means for filling molding sand within an upper molding space that is defined by the cope flask, the match plate, and the upper squeeze member, and a lower molding space that is defined by the drag flask, the match plate, and the lower squeeze member; and driving means for driving the upper and lower squeeze members toward the match plate to squeeze the molding sand within the upper and lower molding spaces to mold an upper mold and a lower mold at the same time.
  • the molding machine is characterized in that it further comprises: upper and lower pushing means for forcibly pushing away the cope and drag flasks that contain the molded upper and lower molds from the match plate when the flasks are stationary, wherein the upper pushing means and the lower pushing means are mounted on both the cope flask and the drag flask.
  • the upper pushing means is a hydraulic cylinder that is extended by oil therein.
  • the lower pushing means is a hydraulic cylinder that has less force to supply the oil that was forced inside the cylinder than that of the upper pushing means, or is an air cylinder that is extended by the compressed air, or is an elastic means that is extended by an elastic member.
  • the cope and drag flasks have sand-filling ports on their sidewalls for filling sand.
  • the drag flask is mounted on a rotating frame, which is rotated downwardly and upwardly in a vertical plane.
  • the cope flask is mounted on the rotating frame such that the cope flask can approach and retract from the drag flasks.
  • the molding machine may further comprise a shuttle for carrying in and carrying out the match plate between the cope and drag flasks. Also, it may further comprise a mechanism for the match plate to approach and retract from the drag flask.
  • the molds from the match-plate molding machine of the present invention may to be tight-flask molds or flaskless molds.
  • FIG. 1 is a front view schematically illustrating a molding machine of the present invention
  • FIG. 2 is a schematic left view of the molding machine of FIG. 1 ;
  • FIG. 3 schematically illustrates a pressurizing fluidic unit that drives the molding machine of FIGS. 1 and 2 .
  • FIG. 4 schematically illustrates an alternative embodiment of the hydraulic power unit.
  • the molding machine of the present invention includes a rotating frame 2 , which is extended substantially vertically.
  • the rotating frame 2 is pivotally mounted on a supporting shaft 1 such that it can be moved up and down in the vertical plane about the supporting shaft 1 .
  • a drag flask 4 whose sidewall has sand-filling ports, is mounted on the lower end of the rotating frame 2 via a supporting member 3 .
  • a pair of guide rods 5 is attached at a predetermined interval therebetween in back and front such that they extend substantially vertically.
  • a match plate 7 is slidably and vertically mounted via guide holders 6 .
  • a cope flask whose sidewall has sand-filling ports, is slidably and vertically mounted via guide holders 8 .
  • Attached to the left side of the rotating frame 2 is the distal end of a piston rod of a downwardly facing, vertical cylinder 10 .
  • the match plate 7 can be carried in and carried out between the cope flask 9 and the drag flask 4 by any well-known shuttle (not shown).
  • the match plate 7 can be moved to approach and retract from the drag flask 4 by an upwardly-facing cylinder (not shown) that is mounted on the rotating frame 2 , as it is extended and contracted.
  • the cope flask 9 is mounted on a cylinder 10 such that it is moved upward and downward by extending and contracting operation of the cylinder 10 to approach and retract from the match plate 7 .
  • Mounted near the four corners of the outer periphery of the cope flask 9 are four downwardly facing hydraulic cylinders (upper pushing means) 11 for pushing away the cope flask 9 from the match plate 7 .
  • mounted near the four corners of the outer periphery of the drag flask 4 are four, upwardly facing, air cylinders (lower pushing means) 12 for pushing away the drag flask 4 from the match plate 7 .
  • the molding machine is provided with a pressurizing fluidic unit 13 that supplies oil to the four hydraulic cylinders 11 and compressed air to the four air cylinders 12 .
  • the pressurizing fluidic unit 13 includes a hydraulic unit 14 having a hydraulic pump for generating the oil and a compressor 15 for generating the compressed air.
  • the hydraulic pump of the hydraulic unit 14 is connected to an upper port and a lower port of a downwardly facing, hydraulic cylinder 16 through a directional control valve 17 and a shut-off valve 18 .
  • a pusher plate 19 On the lower end of the piston rod of the hydraulic cylinder 16 , a pusher plate 19 is fixed. Below the pusher plate 19 , four hydraulic pushers 21 , for extruding and supplying the oil to respective upper ports of the four hydraulic cylinders 11 through four pipes 20 , are provided such that their upper ends abut the pusher plate 19 .
  • Each of the hydraulic pushers 21 comprises an upwardly facing, hydraulic cylinder structure.
  • the four pipes 20 are connected to the hydraulic pump of the hydraulic unit 14 through four respective shut-off valves 22 .
  • the respective lower ports of the four hydraulic cylinders 11 are connected to the hydraulic unit 14 through the directional control valve 17 .
  • the four air cylinders 12 are connected to the compressor 15 through a directional control valve 23 .
  • the match plate 7 is sandwiched and held between the cope flask 9 and the drag flask 4 at a molding station (not shown).
  • Upper and lower squeeze members (not shown) are then inserted into the corresponding openings, which are opposed to the match plate 7 , of the cope flask 9 and the drag flask 4 , to define upper and lower molding spaces.
  • the cope flask 9 , the drag flask 4 , the match plate 7 , and their associated elements defining the molding space are then turned to their vertical positions or horizontal positions such that molding sand is blown and filled within the molding spaces through the sand-filling ports of the cope and drag flasks 9 and 4 .
  • the upper and lower squeeze members are then drivingly moved to the match plate 7 to squeeze the molding sand within the upper and lower molding spaces to make an upper mold and a lower mold at the same time.
  • the molding machine is in the state shown in FIGS. 1 and 2 .
  • shut-off valve 18 is preliminarily opened to supply the oil to the lower port of the cylinder 16 and the upper ports of the four hydraulic pushers 21 to contract the cylinder 16 and to extend the four hydraulic pushers 21 .
  • the shut-off valve 18 is then closed and the four shut-off valves 22 are opened to supply the oil from the hydraulic pump of the hydraulic unit 14 to the four pipes 20 , and the lower ports of the four hydraulic pushers 21 .
  • the oil from the hydraulic pump is also supplied to the upper ports of the four hydraulic cylinders 11 to contract them.
  • the four shut-off valves 22 which are located between the four pipes 20 and the hydraulic unit 14 , are then shut off.
  • the cylinder 10 is extended to raise the cope flask 9 , while another cylinder (not shown) is contracted to raise the match plate 7 .
  • the velocity of the cope flask 9 when it rises is preferably twice that of the match plate 7 .
  • the directional control valve 17 is then turned to extend the cylinder 16 to contract the four hydraulic pushers 21 through the pusher plate 19 to supply the oil to the upper ports of the four hydraulic cylinders 11 to extend them.
  • the directional control valve 23 is turned to supply the compressed air from the compressor 15 to the four air cylinders 12 to extend them.
  • the four hydraulic cylinders 11 push down the match plate 7 , while the four air cylinders 12 are simultaneously pushed up to the match plate 7 .
  • the cope flask 9 and the drag flask 4 are thus stripping at the same time. Therefore, this prevents an undesirable impact that may cause a defect in a mold that is involved in the conventional second stripping (stripping one flask from the match plate on which a mold that is contained within the flask is adhered).
  • the match-plate molding machine for which the present invention can be applied are not limited to those described and shown herein.
  • the match plate, the cope flask, and the drag flask may rotate after the match plate is held between the cope and drag flasks.
  • the match plate may be held between the cope flask and the drag flask after the flasks are rotated. Therefore, the timing of holding the match plate and rotating the flasks does not limit the present invention.
  • the resulting upper and lower molds that are made by the molding machine and molding method of the present invention may be tight-flask molds or flaskless molds.
  • the hydraulic power unit 13 of the molding machine of the present invention is not limited to its embodiment shown in FIG. 3 .
  • the hydraulic power unit 13 of FIG. 3 may be replaced with, e.g., the alternative hydraulic power unit 13 A of FIG. 4 .
  • the alternative hydraulic power unit 13 A of FIG. 4 differs from the foregoing hydraulic power unit 13 of FIG. 3 in that the hydraulic cylinder 16 and the shut-off valve 18 are eliminated, while the upper ports of the hydraulic pushers 21 are connected to the directional control valve 17 . Because the other elements of the alternative hydraulic power unit 13 A of FIG. 4 are the same as those that are denoted by the same numbers of the hydraulic power unit 13 of FIG. 3 , their explanations are omitted.
  • the molding machine makes the upper and lower molds at the same time, in the same manner as in the foregoing embodiment.
  • the molding machine is thus in the state shown in FIGS. 1 and 2 .
  • the four shut-off valves are then opened to supply the oil to the four pipes 20 and the lower ports of the four hydraulic pushers 21 .
  • the oil is also supplied to the upper ports of the four cylinders 11 , to contract them.
  • the four shut-off valves are then closed to shut off the fluid communication between the four pipes 20 and the hydraulic unit 14 .
  • the cylinder 10 is then extended to raise the cope flask, while the other cylinder (not shown) is contracted to raise the match plate 7 .
  • the velocity of the cope flask 9 when it rises is preferably twice that of the match plate 7 .
  • the directional control valve 17 is then turned to contract the hydraulic pushers 21 through the pusher plate 19 to supply the oil to the upper ports of the four hydraulic cylinders 11 , to extend them.
  • the directional control valve 23 is turned to supply the compressed air from the compressor 15 to the four air cylinders 12 to extend them. Therefore, the four hydraulic cylinders 11 push down the match plate 7 , while the four air cylinders 12 push up the match plate 7 .

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Devices For Molds (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
US11/822,578 2007-01-15 2007-07-09 Molding machine and molding method Abandoned US20080169075A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2007-005585 2007-01-15
JP2007005585 2007-01-15

Publications (1)

Publication Number Publication Date
US20080169075A1 true US20080169075A1 (en) 2008-07-17

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ID=38461891

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US11/822,578 Abandoned US20080169075A1 (en) 2007-01-15 2007-07-09 Molding machine and molding method

Country Status (9)

Country Link
US (1) US20080169075A1 (ja)
EP (1) EP1952912B1 (ja)
JP (1) JP5027879B2 (ja)
KR (1) KR101392355B1 (ja)
CN (1) CN101578146A (ja)
BR (1) BRPI0720981A2 (ja)
MX (1) MX2009007561A (ja)
TR (1) TR201904582T4 (ja)
WO (1) WO2008087759A1 (ja)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102078917A (zh) * 2010-12-21 2011-06-01 四川海科机械制造有限公司 半模成形的制造方法及其应用模板
CN114425607A (zh) * 2022-01-25 2022-05-03 常州大学 一种具有主动侧压力的双轴联动砂箱成型设备

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102632204B (zh) * 2012-04-28 2013-11-20 许云东 用型砂造型的造型装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3630268A (en) * 1969-09-08 1971-12-28 Sherwin Williams Co Foundry molding machine with means to alternately index cope and drag flasks between molding and closing units
US3744549A (en) * 1967-08-18 1973-07-10 Buehler Eugen Apparatus for automatic production and transportation of flaskless sand moulds in metal casting
US3878881A (en) * 1972-03-10 1975-04-22 Pettibone Corp Method for producing and assembling cope and drag mold parts
US4411303A (en) * 1979-10-01 1983-10-25 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Sand mold-producing apparatus

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6418547A (en) * 1987-07-13 1989-01-23 Taiyo Chuki Kk Automatic snap flask molding method
JP2772859B2 (ja) * 1990-07-27 1998-07-09 新東工業株式会社 無枠鋳型造型機
EP1161319B1 (en) * 1999-02-23 2002-08-07 Disa Industries A/S Machine for producing flaskless moulds
JP4288668B2 (ja) 2003-12-18 2009-07-01 新東工業株式会社 上・下鋳型のマッチプレートからの分離装置
KR100895356B1 (ko) * 2003-12-18 2009-04-29 신토고교 가부시키가이샤 주형틀없는 상·하 주형의 조형방법, 그 장치 및 매치플레이트의 교환방법
KR100898196B1 (ko) 2004-03-18 2009-05-18 신토고교 가부시키가이샤 무틀식 상·하 주형의 조형방법 및 그 장치

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3744549A (en) * 1967-08-18 1973-07-10 Buehler Eugen Apparatus for automatic production and transportation of flaskless sand moulds in metal casting
US3630268A (en) * 1969-09-08 1971-12-28 Sherwin Williams Co Foundry molding machine with means to alternately index cope and drag flasks between molding and closing units
US3878881A (en) * 1972-03-10 1975-04-22 Pettibone Corp Method for producing and assembling cope and drag mold parts
US4411303A (en) * 1979-10-01 1983-10-25 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Sand mold-producing apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102078917A (zh) * 2010-12-21 2011-06-01 四川海科机械制造有限公司 半模成形的制造方法及其应用模板
CN114425607A (zh) * 2022-01-25 2022-05-03 常州大学 一种具有主动侧压力的双轴联动砂箱成型设备

Also Published As

Publication number Publication date
JP2010515574A (ja) 2010-05-13
BRPI0720981A2 (pt) 2014-03-18
MX2009007561A (es) 2009-07-22
KR20090101466A (ko) 2009-09-28
KR101392355B1 (ko) 2014-05-08
JP5027879B2 (ja) 2012-09-19
EP1952912A1 (en) 2008-08-06
CN101578146A (zh) 2009-11-11
WO2008087759A1 (en) 2008-07-24
EP1952912B1 (en) 2019-03-06
TR201904582T4 (tr) 2019-05-21

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AS Assignment

Owner name: SINTOKOGIO, LTD., JAPAN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:HIRATA, MINORU;KOMIYAMA, TAKAYUKI;OYA, TOSHIHIKO;AND OTHERS;REEL/FRAME:019902/0197

Effective date: 20070712

STCB Information on status: application discontinuation

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