EP2431110B1 - Dispositif de broyage de morceaux et systeme de fourniture de sable conditionne - Google Patents

Dispositif de broyage de morceaux et systeme de fourniture de sable conditionne Download PDF

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Publication number
EP2431110B1
EP2431110B1 EP10774802.2A EP10774802A EP2431110B1 EP 2431110 B1 EP2431110 B1 EP 2431110B1 EP 10774802 A EP10774802 A EP 10774802A EP 2431110 B1 EP2431110 B1 EP 2431110B1
Authority
EP
European Patent Office
Prior art keywords
machine
balls
molding sand
bar
disintegrating
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.)
Active
Application number
EP10774802.2A
Other languages
German (de)
English (en)
Other versions
EP2431110A1 (fr
EP2431110A4 (fr
Inventor
Keiji Chikyu
Yoshinobu Suzuki
Yasushi Ono
Kenji Ishiguro
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
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Publication date
Application filed by Sintokogio Ltd filed Critical Sintokogio Ltd
Publication of EP2431110A1 publication Critical patent/EP2431110A1/fr
Publication of EP2431110A4 publication Critical patent/EP2431110A4/fr
Application granted granted Critical
Publication of EP2431110B1 publication Critical patent/EP2431110B1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C5/00—Machines or devices specially designed for dressing or handling the mould material so far as specially adapted for that purpose
    • B22C5/04—Machines or devices specially designed for dressing or handling the mould material so far as specially adapted for that purpose by grinding, blending, mixing, kneading, or stirring
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C5/00—Machines or devices specially designed for dressing or handling the mould material so far as specially adapted for that purpose
    • B22C5/14—Equipment for storing or handling the dressed mould material, forming part of a plant for preparing such material
    • B22C5/16—Equipment for storing or handling the dressed mould material, forming part of a plant for preparing such material with conveyors or other equipment for feeding the material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C5/00—Machines or devices specially designed for dressing or handling the mould material so far as specially adapted for that purpose
    • B22C5/18—Plants for preparing mould materials

Definitions

  • the present invention relates to a system for supplying molding sand by using a machine.
  • molding sand that has been prepared from green sand and that is to be used for molding is subject to pressure when mulling it.
  • sand particles adhere to each other to form balls.
  • the balls are mixed in the molding sand.
  • a machine for disintegrating these balls in mulled sand to make the sand better for molding has been known (for example, see Japanese Patent Laid-open Publication No. H09-052142 ).
  • US 5 857 513 A describes a chute defining a housing of an aerator assembly for use in a vertical molding machine, wherein in the chute is a mixing member defined by a plurality of shafts each being individually operated by a drive motor.
  • FR 2 100 598 A1 describes a similar device with a mixing chamber having a pair of horizontal drums with radially protruding wings.
  • the machine disclosed in that publication comprises many inner pins and many outer pins. They all stand vertically.
  • the inner and outer pins are concentrically disposed.
  • the inner pins are rotated to disintegrate the balls in the green sand between them and the outer pins, which are fixed. This machine is useful for preparing molding sand.
  • this machine is high. Thus a high space is required to install it.
  • the conveyer belt that has been installed over the green-sand molding machine must be raised by about 1 meter. For this reason, renovating the building may be needed. Thus in some cases installing the machine is abandoned. If no renovation of the building is needed, the available space becomes narrower, to thereby make it difficult to maintain the machine.
  • a molding machine utilizes air, such as an aeration-type molding machine
  • molding sand is uniformly filled in a mold cavity, especially in a small space such as a pocket, by means of airflow.
  • An object of the present invention is to provide a system for supplying molding sand that does not reach high level, that enables space to be saved, and that facilitates maintenance of the machine.
  • the machine for disintegrating balls in molding sand comprises a first bar for disintegrating balls in molding sand that is supported at both ends and has a plurality of blades that are arranged to radiate from the rotating shaft of the bar. It also comprises a second bar for disintegrating balls in molding sand that is supported on a common plane horizontal with, parallel to, and at a certain distance from, the first bar. The second bar rotates in a reverse direction from the direction of the first bar.
  • the system for supplying molding sand of the present invention utilizes the machine that is described above. It is characterized in that the disintegrating bars are supported on a frame of a carriage. And electric motors for rotating the disintegrating bars are mounted on the carriage.
  • the machine for disintegrating balls in molding sand is not high, and so does not require a great height for installing it.
  • the present invention has an advantage such that the performance of an aeration-type molding machine can be maintained. Further, the present invention has advantages such that a space for a system for supplying molding sand can be saved and maintenance can be facilitated.
  • Figs. 1 and 2 are schematic diagrams for showing the arrangement of the machine for disintegrating balls in molding sand of the present invention. They illustrate the status under normal operation.
  • Fig. 3 illustrates a status under maintenance.
  • Fig. 4 is a schematic plan view of the main body of the machine. In Fig. 1 a column F and a beam H are shown.
  • the machine 1 for disintegrating balls in molding sand comprises a first bar B1 for disintegrating balls in molding sand and a second bar B2 for disintegrating balls in molding sand.
  • the second bar B2 is supported on the common plane horizontal with the first bar B1. They are parallel to each other and placed a certain distance apart.
  • the second bar B2 has a rotating shaft 3-2 that rotates in a reverse direction from that of the first bar B1.
  • Both ends of both bars B1, B2 are supported by, for example, a frame 8 of a carriage.
  • Both bars B1, B2 have a plurality of blades 2-1, 2-2 (collectively called “2") that are disposed at uniform intervals in the circumferential and axial directions on respective rotating shafts 3-1, 3-2 (collectively called “3").
  • the blades 2-1, 2-2 are not necessarily disposed at uniform intervals in the circumferential and axial directions on the rotating shafts 3-1, 3-2. They may be disposed at arbitrary intervals.
  • a chute Sh has an upper opening below one end of a conveyer belt for transporting molding sand. The upper end has a frame structure that is connected to the frame 8 of the carriage. The chute Sh is shaped to narrower downwardly.
  • the bottom of it is connectable to a tank for sand that is an upper part of a molding machine. That is, the chute Sh appears to be composed of a rectangle, a trapezoid, and a rectangle (see Fig. 8 ). The chute may have any shape, unless molding sand spills outside it.
  • the blades 2 can be formed by a clipped plate, a round bar, or a stud bolt. They radiate from the rotating shaft 3.
  • the machine 1 for disintegrating balls in molding sand is configured so that the blades 2-2 of the second bar B2 go downwardly through the gaps 4 between the blades 2-1, 2-1 of the first bar B1 to disintegrate the balls by downwardly combing the molding sand.
  • the gap between the blades is 13 mm in the longitudinal direction of the bars B1, B2.
  • the minimum distance between the shaft 3 and the blades 2 is 73 mm.
  • the balls are efficiently disintegrated by combing, shearing, or cutting.
  • the first bar B1 and the second bar B2 are provided with respective motors 5 to rotate the shafts 3-1 and 3-2, respectively.
  • the shafts 3 and the motors 5 are linked by V-belts 14, 14.
  • the two motors 5, 5 are used so as to independently rotate the two shafts.
  • the rotating speed of the first bar B1 and the second bar B2 can be adjusted so that their rim speeds are equal to, or faster than, the speed of free fall of the molding sand S.
  • the shape of the carriage 11 is defined by the frame 8.
  • the carriage 11 is equipped with four rollers that are disposed on the frame 8.
  • the rollers are configured to move on the rails that are installed on a part of the beam in the building.
  • Rails are not necessarily needed. Any structure that can substitute for them can be used.
  • the rollers are equipped with stoppers to be fixed during a time other than maintenance.
  • Fig. 2 illustrates the side cross-sectional view of the arrangement of the machine 1 for disintegrating balls in molding sand of the present invention.
  • a means 7 is provided for detecting slippage of the shafts 3 of the first bar B1 and the second bar B2.
  • the means 7 for detecting the slippage detects the slippage by counting an object 10 that is attached to the shaft 3 by means of a proximity switch 9. If the count by the proximity switch 9 significantly decreases, then the slippage has occurred.
  • the object 10 is formed as an L-shaped plate. However, any structure can be used for it if the proximity switch 9, which is disposed on the frame 8 of the carriage, counts how many times the object 10 comes close. If the number of rotations of the shafts 3 can be counted, any structure can be used.
  • the machine 1 for disintegrating balls in molding sand is located just below a machine 12 for loading molding sand.
  • the machine 1 is moved with the carriage 11 to the left side on the drawing. It is moved away from the machine 12 for loading molding sand.
  • the upper part of the molding machine 13 has an elevating function. This function is achieved because the machine for loading molding sand of the molding machine 13 is telescopically supported by a cylinder (not shown). This cylinder enables that function to be carried out. During maintenance the molding machine 13 is downwardly separated from the machine 1 for disintegrating balls in molding sand.
  • the machine 1 for disintegrating balls in molding sand is constructed as discussed above.
  • Fig. 1 the machine 1 for disintegrating balls in molding sand is activated. Then molding sand S is loaded from above to the space between the first bar B1 and the second bar B2 by the machine 12 for loading molding sand. The molding sand S is downwardly combed so as to disintegrate the balls in it. That is, the first bar B1 rotates clockwise and the second bar B2 rotates counterclockwise.
  • a "ball” means a lump of sand that has a diameter of 6 mm or over.
  • the "balls" are measured as follows. That is, sand that is taken at the point where it is measured is sieved ten times through a screen with a mesh size of 6 mm.
  • the rate of the weight of sand on the screen to that of the sand that is taken is calculated as the rate of content of the balls.
  • the slippage is examined as follows. If an excessive amount of molding sand is loaded into the machine 1 for disintegrating balls in molding sand, or if too many balls are included, the capacity of the machine 1 may be exceeded.
  • the proximities of the object 10 that is attached to the shaft 3 is counted by the proximity switch 9. If the significant decrease of the count by the proximity switch 9 is detected, the occurrence of the slippage is detected. If so, a display showing an abnormal operation is shown or loading the molding sand is stopped.
  • the machine 1 for disintegrating balls in molding sand comprises the first bar B1 for disintegrating the balls, which bar is supported at both ends.
  • the first bar B1 has a plurality of blades 2 that are arranged to radiate from the rotating shaft 3.
  • the machine 1 also comprises the second bar B2 for disintegrating the balls, which bar is supported on the common plane horizontal with, parallel to, and at a certain distance from, the first bar B1.
  • the second bar B2 rotates in a reverse direction from the direction of the first bar B1.
  • the system for supplying molding sand utilizes the machine 1 for disintegrating balls in molding sand.
  • the bars B1, B2 for disintegrating the balls in molding sand are supported by the frame 8 of the carriage.
  • the bars B1, B2 may be supported by the frame 8 directly or via the other member or members.
  • the phrase “the bars B1, B2 are supported by the frame 8" means any structure that includes a structure where they are supported by the chute Sh.
  • the procedure for maintenance is now described.
  • the machine 1 for disintegrating balls in molding sand that has been located just below the machine 12 for loading sand is moved with the carriage 11 to the left side in the drawing.
  • the machine 1 is moved away from the machine 12.
  • replacing the bars B1, B2 for disintegrating the balls in molding sand is facilitated.
  • a mobile crane K is used to decrease the amount of hard work (work where strong muscles, such as arm or thigh muscles, are used, and so much energy is consumed).
  • the machine 1 for disintegrating balls in molding sand that was just below the machine 12 for loading molding sand during normal operation is moved away from the machine 12, maintaining the system for supplying molding sand of the present invention is easy to do.
  • the machine is brought to the side opposite the machine 12. However, it may be brought in any direction.
  • the molding machine 13 has an elevating function, the maintenance becomes easier, since the carriage 11 moves without interfering with the chute Sh, which is disposed under the machine 1 for disintegrating balls in molding sand.
  • the system of the present invention significantly makes the performance of molding better. If the sand muller has an agitator, the system has advantages to remove small balls and the balls that are generated during the transportation of molding sand.
  • the machine 1 for disintegrating balls in molding sand of the present invention has an advantage in having the facilities and the space for installing the machine to be not high, to thus save costs. It also has an advantage to maintain the performance of an aeration-type molding machine.
  • the system for supplying molding sand of the present invention has advantages such that the space for it can be saved and the maintenance can be facilitated.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Devices For Molds (AREA)
  • Crushing And Pulverization Processes (AREA)
  • Crushing And Grinding (AREA)

Claims (4)

  1. Système d'alimentation en sable de moulage (S) comprenant une machine (1) pour désintégrer des billes dans du sable de moulage (S) comprenant :
    une première barre (B1) pour désintégrer les billes qui est supportée aux deux extrémités,
    une seconde barre (B2) pour désintégrer les billes qui est supportée sur un plan commun horizontal avec, parallèle à, et à une certaine distance de, la première barre (B1), la seconde barre (B2) tournant en sens inverse du sens de la première barre (B1),
    à la fois la première barre (B1) et la seconde barre (82) ayant une pluralité de lames (2) qui sont agencées pour rayonner à partir d'un arbre rotatif (3) ;
    dans lequel, lorsque le sable de moulage (S) est chargé d'en haut dans un espace entre la première barre (B1) et la seconde barre (B2), les billes sont désintégrées tandis que le sable de moulage (S) est peigné vers le bas ;
    caractérisé en ce que les barres (B1, B2) pour désintégrer les billes dans du sable de moulage (S) sont supportées par le châssis (8) d'un chariot (11) et que des moteurs (5) pour faire tourner les barres (B1, B2) sont montés sur le chariot (11).
  2. Système d'alimentation en sable de moulage (S) selon la revendication 1, comprenant une machine de moulage (13) ayant une fonction élévatrice.
  3. Système d'alimentation en sable de moulage (S) selon la revendication 2, comprenant un broyeur de sable ayant des roues de malaxage.
  4. Système d'alimentation en sable de moulage (S) selon la revendication 2, comprenant un malaxeur de sable comportant un agitateur.
EP10774802.2A 2009-05-15 2010-04-14 Dispositif de broyage de morceaux et systeme de fourniture de sable conditionne Active EP2431110B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2009118258 2009-05-15
PCT/JP2010/056668 WO2010131544A1 (fr) 2009-05-15 2010-04-14 Dispositif de broyage de morceaux et systeme de fourniture de sable conditionne

Publications (3)

Publication Number Publication Date
EP2431110A1 EP2431110A1 (fr) 2012-03-21
EP2431110A4 EP2431110A4 (fr) 2018-02-21
EP2431110B1 true EP2431110B1 (fr) 2019-11-13

Family

ID=43084921

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10774802.2A Active EP2431110B1 (fr) 2009-05-15 2010-04-14 Dispositif de broyage de morceaux et systeme de fourniture de sable conditionne

Country Status (4)

Country Link
EP (1) EP2431110B1 (fr)
JP (1) JP5553069B2 (fr)
CN (1) CN102413960B (fr)
WO (1) WO2010131544A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109093066B (zh) * 2018-08-20 2023-09-22 黟县新达机械铸造有限公司 一种便于调节出料流量的小型铸造用混砂机
CN117300057A (zh) * 2023-11-28 2023-12-29 康硕(山西)智能制造有限公司 一种用于精密铸造时填充砂箱的设备

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US1413345A (en) * 1921-06-04 1922-04-18 Morris Automatic Scale Company Agitating feeder
DE2055274A1 (de) * 1969-11-13 1971-05-19 Baker Perkins Ltd Verfahren und Vorrichtung zum Erzeugen einer fur die Herstellung von Gießerei formen und/oder kernen dienenden Mischung aus Sand, Harz und Katalysator
JPS5141847Y2 (fr) * 1973-03-01 1976-10-12
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JPS601098B2 (ja) * 1978-01-31 1985-01-11 新東工業株式会社 吹き込み式造型機における金型交換装置
JPS6094344U (ja) * 1983-11-30 1985-06-27 日野自動車株式会社 鋳造用砂塊の破砕装置
US4560281A (en) * 1984-04-16 1985-12-24 Foundry Automation, Inc. Foundry apparatus for mixing sand with binder
JPS6325148U (fr) * 1986-07-30 1988-02-19
JP2926248B2 (ja) * 1990-01-23 1999-07-28 株式会社五十鈴製作所 中子セッター
JP2535079Y2 (ja) * 1991-03-29 1997-05-07 新東工業株式会社 鋳物砂供給装置
JP2544477Y2 (ja) * 1991-04-22 1997-08-20 新東工業株式会社 鋳物砂計量ホッパ装置
JPH0683138U (ja) * 1993-05-07 1994-11-29 新東工業株式会社 鋳物砂供給装置
AU3957295A (en) * 1994-10-19 1996-05-15 Brunswick Industrial Inc. Aerator assembly for vertical filling of molding machines
JPH08300096A (ja) * 1995-05-01 1996-11-19 Toyota Motor Corp 鋳物砂混練装置
JPH0913177A (ja) * 1995-06-29 1997-01-14 Tokushu Denkyoku Kk サーメット肉盛り金属部品及びその製造方法
JP3278098B2 (ja) 1995-08-11 2002-04-30 新東工業株式会社 鋳物砂エヤレ−ション装置
US5924637A (en) * 1997-04-16 1999-07-20 Niederholtmeyer; Werner Oversize tire and rubber debris shredder
JPH11239936A (ja) * 1998-02-23 1999-09-07 Toyoda Mach Works Ltd 圧力給排装置を備えた工作機械
JP2002143984A (ja) * 2000-11-13 2002-05-21 Sintokogio Ltd 砂ダマ砕き装置
JP2009118258A (ja) 2007-11-07 2009-05-28 Toshiba Corp 電圧電流変換回路

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Also Published As

Publication number Publication date
EP2431110A1 (fr) 2012-03-21
CN102413960B (zh) 2015-02-04
CN102413960A (zh) 2012-04-11
JPWO2010131544A1 (ja) 2012-11-01
JP5553069B2 (ja) 2014-07-16
WO2010131544A1 (fr) 2010-11-18
EP2431110A4 (fr) 2018-02-21

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