Plant for closure of foundry molds |
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| 申请号 | US3640335D | 申请日 | 1970-05-25 | 公开(公告)号 | US3640335A | 公开(公告)日 | 1972-02-08 |
| 申请人 | PLERRE JUSTIN AUGUSTE DARBENVI; | 发明人 | DARBENVILLE PLERRE JUSTIN AUGU; | ||||
| 摘要 | A plant for closure of foundry molds which comprise upper and lower halves, said plant comprising essentially a rolling track sloping at a shallow inclination, which by gravity conveys the lower halves of the molds to a positioning and closing station and which removes the molds after closure, a framework arranged over said rolling track and acting as a support for a device for transfer of the upper halves of the molds, coordinated with a device for infeed of the said halves, and means of ensuring the displacement of the transfer device in two directions. | ||||||
| 权利要求 | 1. Plant for closing molds which comprise upper and lower halves comprising a positioning and closing station, a rolling track sloping at a shallow inclination to convey by gravity the lower halves of the molds to said positioning and closing station, a framework over said rolling track, transfer means supported on said framework to position the upper halves of the molds over the lower halves in said station, feeding means to feed said upper halves to said transfer means, control means to effect displacement of the transfer means in two directions, said transfer means comprising a platform vertically displaceable in both directions and consecutively receiving the upper halves of said molds to be placed on the lower halves in said positioning and closing station, two tipping bars, rollers for said platform carried by said bars which are laterally withdrawable to allow said platform to be raised in an empty state, said bars being aligned with said feeding means which comprises two parallel rows of rollers in extended alignment with the rows of platform supporting rollers to deliver the upper parts of the molds to the transfer means. 2. Plant according to claim 1, and comprising means for effecting vertical displacement of said transfer platform, said means comprising a double-acting ram and a reversible electromagnetic valve controlling said ram, and two contactors arranged in parallel in a supply circuit of the said electromagnetic valve being provided to control said valve. 3. Plant according to claim 2, in which said upper half of each mold comprises end rings and assembling studs and said lower half oF each mold comprises end rings for alignment with the studs of the upper half, and an end-of-travel contactor which controls said electromagnetic valve is operated by the end ring of an upper half to lower said transfer platform when the upper half is in correct alignment with said lower half in said positioning and closing station. 4. Plant according to claim 3, in which said electromagnetic valve is manually controlled, a feed valve controls the raising and the securing of said ram in the raised position, and counterweight acts directly on said feed valve when said electromagnetic valve is closed. 5. Plant according to claim 4, in which an adjustable-level horizontal bar carries said end-of-travel contactor, and two sheaths sliding on guide rods fastened to the transfer platform effect vertical displacement of said horizontal bar. 6. Plant according to claim 5, in which a further contactor arranged in series with said end-of-travel contactor is closed by the pressure exerted upon it in the vertical position of one of said tipping bars. 7. Plant according to claim 6, in which two vertical abutment rods and cooperating cams connected with the tipping bars are provided on said framework supporting the transfer means. 8. Plant according to claim 7, in which a counterweight acts on each tipping bar. 9. Plant according to claim 8, in which two oblique magnetized ramps which retain the rings of the upper halves of the molds precede said end-of-travel contactor. 10. Plant according to claim 3, in which said transfer means comprise two oblique ramps which guide the rings of the lower halves of the molds against a tipping bolt which is provided for release of the closed molds, a locking articulated linkage incorporating a return counterweight being provided to actuate said bolt, said linkage being actuated in the lifting direction of the transfer platform by means of the lower bar of the yoke arranged at the lower part of the said platform, by means of an operating rod which is downwardly withdrawable against the action of a return spring, and in the other direction causes the downward pivoting of the bolts securing the closed mold. 11. Plant according to claim 3, and comprising means associated with said rolling track for preliminary alignment of the lower halves of the molds, said means comprising two aligning fingers which pivot in a horizontal plane at either side of said track at the level of said rings on the lower parts of the molds on said track, each aligning finger being connected with a lever and the levers extending in opposite directions to each other, and a linking bar interconnecting the extremities of the two levers. |
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