Match plate foundry molding machine |
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| 申请号 | US3589432D | 申请日 | 1967-10-02 | 公开(公告)号 | US3589432A | 公开(公告)日 | 1971-06-29 |
| 申请人 | SHERWIN WILLIAMS CO; | 发明人 | MILLER LEON F; HERBRUGGEN HENRY J; SHIELDS ROBERT G; | ||||
| 摘要 | A foundry molding machine utilizing a match plate and two sets of rubber-lined cope and drag slip flasks with two stations; one station assembling one set of flasks with the match plate therebetween and then rolling over the flask-match-plate assembly to fill the drag with sand while supporting the assembly on the cope and jolting and applying a low-pressure preliminary squeeze to the sand within the drag, rolling the assembly back to fill the cope and then supporting the assembly on the sand within the drag for the application of jolt and high-pressure squeeze to the sand in both the cope and drag, separating the assembly and indexing the cope and drag vertically separated to a second station while simultaneously indexing the second set of flasks to the first station, holding the sand-rammed flasks vertically separated in the other station to permit coring and closing the flasks and stripping the sand cakes thus assembled therefrom to be placed on a bottom board while the second set of flasks are being filled and rammed at the first station; the indexing and rollover of such flasks being obtained each by a piston-cylinder assembly having controlled stroke deceleration on extension thereof. | ||||||
| 权利要求 | 1. A foundry molding machine comprising means operative to assemble cope and drag flasks with a match plate therebetween, means operative to invert such assembly to place the drag flask up, means operative to fill such drag flask with sand, means operative to apply a low-pressure squeeze to the sand within such drag flask, means operative to reinvert such assembly to place the cope flask up, means operative to fill such cope flask with sand, and means operative simultaneously to apply a high-pressure squeeze to the sand in the cope and drag flasks. 2. A foundry molding machine as set forth in claim 1 wherein said means operative to assemble cope and drag flasks with a match plate therebetween comprises a vertically movable jolt table operative to jolt such assembly in conjunction with the application of the low- and high-pressure squeeze. 3. A foundry molding machine as set forth in claim 1 including a vertically movable jolt table operative to assemble the cope and drag flasks with the match plate therebetween, and a large-diameter pneumatic squeeze piston-cylinder assembly vertically aligned with said jolt table. 4. A foundry molding machine as set forth in claim 1 including split trunnions projecting laterally from the cope and drag, and retractible trunnion supports operative to support such assembly for inversion. 5. A foundry molding machine as set forth in claim 1 wherein said means operative to invert such assembly comprises a piston-cylinder assembly which includes means operative to obtain controlled deceleration at the end of its inversion stroke. 6. A foundry molding machine as set forth in claim 1 including a vertically movable table operative to disassemble the cope and drag flasks and place the same in vertically spaced alignment. 7. A foundry molding machine as set forth in claim 1 including a vertically movable table operative to disassemble the cope and drag flasks and place the same in vertically spaced alignment; and means operative to index such sand-filled flasks in such vertically spaced condition to a coring and closing station, and means operative at such station to strip the sand molds from the flask and assemble such molds on a bottom board. 8. A foundry molding machine as set forth in claim 1 wherein said means operative to fill the flasks with sand comprises a horizontally movable sandbox with a slide plate therebeneath, and means operative to retract the slide plate from beneath the sandbox to cause the sand within the box to fall within the flasks. 9. A foundry molding machine as set forth in claim 1 including indexing means supporting such flasks unassembled operative to shift the flasks in pairs to and from a coring and closing station. 10. A foundry molding machine comprising means operative to assemble a pair of flasks with a pattern therebetween, means operative to fill one flask with sand, means operative preliminarily to squeeze such sand, means operative to invert such assembly, means operative to fill the other flask with sand, and means operative simultaneously to squeeze the sand in both flasks. 11. A foundry molding machine as set forth in claim 10 including means operative to support such assembly on the preliminarily squeezed sand in said one flask during the simultaneous squeezing of sand in both flasks. 12. A foundry molding machine as set forth in claim 11 including means operative to jolt such assembly during the preliminary and final simultaneous squeeze. 13. A foundry molding machine including means to form a sand mold in a flask, means operative to invert said flask with the mold therein comprising a piston-cylinder assembly, said assembly first retracting and then extending to complete its inversion stroke, and means in said piston-cylinder assembly operative to obtain controlled deceleration on extension only; said piston-cylinder assembly including an oil chamber from which oil is forced on extension of said assembly, axially spaced ports in said chamber successively closed by movement of the piston of said assembly, and bypass means for said ports operative only on retraction. 14. A foundry molding machine including means operative to form a sand mold in a flask, means operative to shift said flask with the mold therein from one station to another comprising a piston-cylinder assembly, said assembly first retracting and then extending to complete its stroke, and means in said piston-cylinder assembly operative to obtain controlled deceleration on extension only; said piston-cylinder assembly including an oil chamber from which oil is forced on extension of said assembly, axially spaced ports in said chamber successively closed by movement of the piston of said assembly, and bypass means for said ports operative only on retraction. 15. A foundry molding machine comprising a table operative to assemble a drag flask and a cope flask with a match plate therebetween, means operative to invert the thus assembled flasks and match plate comprising a piston-cylinder assembly, said assembly first retracting and then extending to complete its inversion stroke, means in said piston-cylinder assembly operative to obtain controlled deceleration on extension, and retractible trunnion means operative to support such assembled flasks and match plate during inversion. 16. A machine as set forth in claim 15 including a key operative to engage the assembled flasks, and means interconnecting the rod end of said piston-cylinder assembly with said key to rotate the latter to invert the flasks. 17. A machine as set forth in claim 15 wherein said trunnion supports include pivotally mounted arms, and a piston-cylinder assembly connected to each said pivotally mounted arm operative to swing said arms outwardly on retraction and inwardly or extension. 18. A foundry molding machine for producing completed foundry molds including means operative at one station to assemble cope and drag flasks with a match plate therebetween, fill such flasks with sand and ram the sand therein against such match plate, and vertically separate such flasks to draw the match plate, therefrom; means operative to index such vertically separated flasks to a second station, and means at said second station for closing and stripping of the flasks from the sand molds therein. 19. A machine as set forth in claim 18 including means at said second station to hold the flasks vertically separated to permit coring for a predetermined period. 20. A machine as set forth in claim 18 wherein said means to index such vertically separated flasks comprises a piston-cylinder assembly, said assembly first retracting and then extending to complete its stroke, and means in said piston-cylinder assembly operative to obtain controlled deceleration on extension. 21. A machine as set forth in claim 18 including closing table means at said second station operative to elevate the drag flask against the cope flask then move the sand mold within the assembled cope and drag flasks against a fixed abutment to strip thE flasks from the molds. 22. A machine as set forth in claim 18 including a closing table at said second station, and means operative to dispense bottom boards onto said closing table prior to the elevation of said table to close the molds and strip the flasks therefrom. 23. In a match plate molding machine of the type using an assembly of paired cope and drag flasks with a match plate therebetween, means operative to form a sand cake in the drag flask, means operative to fill the cope flask with sand and ram such sand therein while supporting such assembly on the sand cake in the drag flask, and indexing means to place the paired flasks in alignment with the match plate, said indexing means comprising a piston-cylinder assembly having controlled deceleration at the end of its indexing stroke. 24. A foundry molding machine as set forth in claim 18 including a post between such stations, said means operative to index such vertically separated flasks rotating such flasks about said post. 25. A foundry molding machine as set forth in claim 18 including a center post between such stations, flask support means extending from said post, and means to rotate said flask support means about said post to index such flasks between such first and second stations. 26. A foundry molding machine as set forth in claim 18 including a post between such stations, and flask support means extending in opposite directions from said post, each flask support means holding a cope and drag flask vertically separated. 27. In a match plate molding machine of the type using an assembly of paired cope and drag flasks with a match plate therebetween, means operative to fill the drag flask with sand, means operative to invert such assembly and to fill the cope flask with sand, means operative to ram such sand within such cope and drag flasks, means operative to separate the match plate from the cope and drag flasks after the sand molds are rammed therein, means to shift said cope and drag flasks to another station, and to hold such flasks in vertically separated condition for a predetermined time for coring, said means to shift said flasks also positioning another paired cope and drag flask to be assembled with the match plate while the first pair of flasks is held for coring as aforesaid. 28. A foundry molding machine as set forth in claim 10 including two stations with a pair of such flasks at each station, such pattern being between a pair of such flasks at one station only. 29. A foundry molding machine as set forth in claim 18 including means to support such match plate by itself at said one station as such vertically separated flasks are indexed to said second station. |
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