EP0844037A1 - Apparatus and method for clamping cope and drag - Google Patents
Apparatus and method for clamping cope and drag Download PDFInfo
- Publication number
- EP0844037A1 EP0844037A1 EP97120488A EP97120488A EP0844037A1 EP 0844037 A1 EP0844037 A1 EP 0844037A1 EP 97120488 A EP97120488 A EP 97120488A EP 97120488 A EP97120488 A EP 97120488A EP 0844037 A1 EP0844037 A1 EP 0844037A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cope
- drag
- engaging
- grid frame
- flask
- 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.)
- Withdrawn
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C21/00—Flasks; Accessories therefor
- B22C21/12—Accessories
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C21/00—Flasks; Accessories therefor
- B22C21/08—Clamping equipment
Definitions
- This invention relates to an apparatus and method for clamping a cope and a drag to prevent the cope from floating in molten metal when it is poured in the mold space formed by the cope and drag and to prevent their deformation due to the expansion of the molten metal when it solidifies.
- a weight In the first process a weight must be notched or formed with an opening for a sprue. Thus it cannot be used for copes that have respective sprues located at different parts. Further, the process limits the methods of molding. Still further, since the process makes the weight unbalanced, the weight may float at one side. When a heavy weight is used, it causes a push up in a mold (cope or drag). Thus a weight which weighs less than is required is used. As a result, floating of a cope or deformation of a mold occurs.
- the purpose of this invention is to provide an apparatus and a method for clamping a cope and a drag to allow a sprue to be formed at a desired part and to prevent the cope from floating in molten metal.
- the method of the present invention for clamping a cope and a drag includes the steps of placing a cope on a drag, covering the top of the cope by a grid frame extending in a horizontal plane, the grid frame having a plurality of openings formed by the grid and having connecting means, and connecting the cope and drag by engaging the connecting means with engaging means which are mounted at the drag side.
- the apparatus of the present invention for clamping a cope and a drag includes a grid flame extending in a horizontal plane.
- the grid frame has a plurality of openings formed therein by the grid. A sprue leading to a cope may be located at any desired opening.
- the grid frame also has connecting means at opposing sides thereof.
- the connecting means engage with engaging means mounted on the drag side.
- the engaging means may be mounted on opposing sides of a flask in which a drag is formed or on a plate or floor which supports the drag.
- the engaging means may be pins, while the connecting means may be members pivotally mounted on the grid frame and having hook portions at the lower end thereof for engaging with the pins.
- Fig. 1 is a plan view of the apparatus of an embodiment of this invention. (In the drawing, a mold and mold-associated members are shown by imaginary lines.)
- Fig. 2 is a side view of the apparatus shown in Fig. 1.
- Fig. 3 is a side view taken along line III - III in Fig. 1 to explain the first embodiment of the method of the invention. (In the drawing, molds and mold-associated members are shown in actual lines.)
- Fig. 4 is a side view of the apparatus, molds, and mold-asssociated members to explain a second embodiment of the method of this invention.
- FIGs. 1 and 2 an apparatus 10 of this invention for clamping a cope and a drag is shown.
- the apparatus 10 has a grid frame 4 comprised of an outer frame 1 in the shape of a window frame and a cruciform member 2 securely attached to the outer frame 1.
- the outer frame 1 and cruciform member 2 define a plurality of openings 3 in the grid frame 4.
- a pair of connecting members 5, 5 are pivotally suspended from opposing sides of the grid frame 4 such that they rotate about pivots 6, 6 in the directions shown by the double arrow.
- FIG. 3 a first embodiment of the method of the invention for clamping a cope 8 and a drag 7 is now explained.
- a lower flask 20, which contains the drag 7, is placed on a floor or a plate 18.
- An upper flask 23, which contains the cope 8, is placed on the lower flask 20 so that the cope 8 mates the drag 7.
- the apparatus 10, shown in Figs. 1 and 2 is then put on the upper flask 23 so that the grid frame 4 covers the top of the cope 8, which is contained in the upper flask 23.
- the top of the cope 8 Before the top of the cope 8 is covered with the grid frame 4, its level is higher (by about 3 mm) than the top of the upper flask 23.
- the top becomes level with the top of the upper flask 23.
- Both the upper and lower flasks 23, 20 are made of cast iron, and both are integrally formed with respective ribs 21, which run horizontally around the flask walls.
- the upper and lower flasks 23, 20 may be connected by connecting their ribs 21, 21 by clamps in a conventional way.
- Engaging members or horizontally extending pins or protuberances 22, 22 are formed at the drag side, e.g., in the embodiment shown in the drawing, on the rib 21 of the lower flask 20 at its opposing sides (only one pin 22 is shown).
- the horizontal pins 22, 22 may be mounted on the floor or plate 18 through upright members (not shown).
- the connecting members 5, 5 are pushed, for example, by a pusher (not shown), so that they engage with the pins 22, 22. Thus the cope and drag are connected.
- a sprue is selectively formed at a desired position 15 or 15A of the cope that is located at one opening. Further, when the cope floats or deforms, its top is held down by the grid frame 4, and therefore the floating or deformation is prevented.
- the engaging members 5, 5 are mounted on the frame 4 through pivots 6, 6.
- the engaging members 5, 5 may be separated from the pivots 6, 6 or grid frame 4, and they may be engaged with both the pivots 6, 6 and pins 22, 22 to engage the cope with the drag.
- a second embodiment of the method of the invention is carried out by using the apparatus 10.
- the drag 12 is placed on a plate 11, which has engaging members or pins 11A.
- the cope 13 is placed on the drag 12 to mate it.
- a jacket 14 is then put on the sides of the cope and the drag.
- the jacket 14 prevents them from causing each other to shift.
- the jacket may be eliminated when such shifting cannot occur.
- the apparatus 10 i.e., the grid frame 4
- the connecting members 5, 5 are then moved to engage with the pins 11A.
- the cope 13 and drag 12 are connected.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Casting Devices For Molds (AREA)
Abstract
Description
Claims (6)
- A method of clamping a cope and a drag comprising the steps of:a) placing a cope (8; 13) on a drag (7; 12),b) covering the top of said cope by a grid frame (4) extending in a horizontal plane, said frame having a plurality of openings (3, 3) formed therein by the grid and having connecting means (5, 5); andc) connecting said cope (8; 13) and drag (7; 12) by engaging said connecting means (5, 5) with engaging means (22; 11A) which are mounted on corresponding portions of opposing sides of said drag at the drag side.
- The method of claim 1, wherein said engaging means (22) are mounted on opposing sides of a flask (20) which contains said drag (7) for engaging with said connecting means (5, 5).
- The method of claim 1, wherein said engaging means (22; 11A) are mounted on a floor or plate (18; 11) which supports said drag (7; 12).
- The method of claim 1, wherein no flask is provided for the cope or drag, said method further comprising a step of covering the sides of said cope and drag by a jacket (14) before the step (a).
- An apparatus for clamping a cope (8; 13) and a drag (7; 12), comprising a grid frame (4) extending in a horizontal plane for covering the top of said cope, said grid frame (4) having a plurality of openings (3, 3) formed therein by the grid and having at opposing sides thereof connecting means (5,5) for engaging with engaging means (22; 11A) mounted at the drag side.
- The apparatus of claim 5, wherein said connecting means (5, 5) include members which are rotatably suspended from said grid frame (4) and each of which has a hook portion at the lower end thereof to engage with said engaging means (22; 11A).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP32770396A JPH10156487A (en) | 1996-11-22 | 1996-11-22 | Method for clamping cope and drag and device thereof |
JP327703/96 | 1996-11-22 |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0844037A1 true EP0844037A1 (en) | 1998-05-27 |
Family
ID=18202045
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97120488A Withdrawn EP0844037A1 (en) | 1996-11-22 | 1997-11-21 | Apparatus and method for clamping cope and drag |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0844037A1 (en) |
JP (1) | JPH10156487A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109093076A (en) * | 2018-09-30 | 2018-12-28 | 广西玉柴机器股份有限公司 | A kind of locking method of sand core group |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105728666A (en) * | 2016-04-28 | 2016-07-06 | 江苏锡华铸造有限公司 | Sand box with convenient box locking tool |
CN105855482A (en) * | 2016-05-18 | 2016-08-17 | 芜湖市和蓄机械股份有限公司 | Simple sand box locking device and application thereof |
CN107282898A (en) * | 2017-05-25 | 2017-10-24 | 南通宏德机电有限公司 | A kind of application method for casting the double-U-shaped clamp of sandbox fastening |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB815859A (en) * | 1956-04-25 | 1959-07-01 | Tiroler Roehren & Metallwerk | Device for clamping flask sections together in foundry plants |
DE1174944B (en) * | 1957-11-05 | 1964-07-30 | Buderus Eisenwerk | Device for the mechanical clamping and unclamping of upper and lower mold boxes on foundry conveyors |
-
1996
- 1996-11-22 JP JP32770396A patent/JPH10156487A/en active Pending
-
1997
- 1997-11-21 EP EP97120488A patent/EP0844037A1/en not_active Withdrawn
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB815859A (en) * | 1956-04-25 | 1959-07-01 | Tiroler Roehren & Metallwerk | Device for clamping flask sections together in foundry plants |
DE1174944B (en) * | 1957-11-05 | 1964-07-30 | Buderus Eisenwerk | Device for the mechanical clamping and unclamping of upper and lower mold boxes on foundry conveyors |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109093076A (en) * | 2018-09-30 | 2018-12-28 | 广西玉柴机器股份有限公司 | A kind of locking method of sand core group |
Also Published As
Publication number | Publication date |
---|---|
JPH10156487A (en) | 1998-06-16 |
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Legal Events
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
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AK | Designated contracting states |
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17P | Request for examination filed |
Effective date: 19980922 |
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17Q | First examination report despatched |
Effective date: 19990212 |
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