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US3640335A - Plant for closure of foundry molds - Google Patents

Plant for closure of foundry molds Download PDF

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Publication number
US3640335A
US3640335A US40053A US3640335DA US3640335A US 3640335 A US3640335 A US 3640335A US 40053 A US40053 A US 40053A US 3640335D A US3640335D A US 3640335DA US 3640335 A US3640335 A US 3640335A
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Prior art keywords
molds
platform
halves
plant according
transfer
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Expired - Lifetime
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US40053A
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English (en)
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Plerre Justin Augu Darbenville
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Individual
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Individual
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    • 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

Definitions

  • a plant for closure of foundry molds which comprise upper in two directions.
  • the present invention relates to a plant for closing foundry molds or frames.
  • the two halves of a foundry mold each filled with rammed sand and having a molding impression, must be assembled tightly one against the other prior to the casting of the metal, and generally secured in this position by at least two centering and locating bars referred to as studs or pegs, which fit into the rings or eyes borne by the lugs of each of the said upper and lower halves of the mold.
  • the present invention eliminates these drawbacks and relates to a plant for closure of foundry molds which allows of automatic, rapid and precise operation, and which can be adapted to fit on the egress of existing molding machines.
  • the plant according to the invention essentially comprises, in combination, a rolling track with rollers positioned at a shallow slope 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 fitting on the said rolling track and acting as a bearer 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 displace ment of the transfer device in both directions.
  • the invention equally relates to a foundry mold or frame more particularly applicable in the aforesaid plant.
  • FIG. 1 is a view in perspective of the plant with the upper half of a mold placed on the rolling track leading to the rollers of a transfer platform.
  • FIG. 2 is a view in perspective of the rear of the plant more particularly showing a rollered rolling track arranged on the transfer platform and serving the purpose of consecutively feeding the upper halves of molds over the corresponding lower halves fed in by gravity, on the rolling track, to the positioning and closing station.
  • FIG. 3 is a view in perspective of the front of the plant, showing the transfer platform with its two parallel rows of tipping rollers.
  • FIG. 4 is a schematic plan view of the plant comprising a device for preliminary alignment of the lower halves of the molds on the rolling track.
  • FIG. 5 is a schematic elevational view corresponding to that of FIG. 4.
  • FIG. 6 is a schematic elevational view which, in the initial position of the transfer platform, shows the position occupied by the rollers carrying the upper half of the mold.
  • FIG. 7 is a schematic elevational view illustrating the withdrawal of the supporting rollers, prior to the relifting of the platform into the position illustrated in FIG. 6.
  • FIG. 8 is a schematic elevational view of a closed mold situated in the positioning and closing station, at the beginning of the ascent of the transfer platform.
  • FIG. 9 is a plan view corresponding to that of FIG. 8, the closed mold having been moved out on the rolling track in the direction shown by the arrow.
  • FIG. 10 is a diagrammatical view of the electric circuit controlling the reversible electromagnetic valve actuating the double-acting ram operating the transfer platform.
  • FIG. 11 is a view from above of a horizontal bar bearing the end-of-travel switch actuated by the ring of the upper half of the mold.
  • FIG. 12 is an enlarged scale elevational view of the device for preliminary alignment of the lower halves of the molds, which is diagrammatically shown in FIG. 4.
  • FIG. 13 is a schematic plan view corresponding to that of FIG. 12.
  • FIG. 14 is an enlarged scale elevational view showing the device for holding the lower halves of the molds in the positioning and closing station, the said device being in the locking position.
  • FIG. 15 is a schematic view illustrating the driving of the valves of the electromagnetic valve alternately feeding the double-acting ram serving the purpose of handling the transfer platform.
  • FIG. 16 is an enlarged scale view in profile of the lug and ring of the mold or frame apparent in FIG. 3.
  • FIG. 17 is an overall view in perspective of a mold or frame such as that illustrated in FIG. 3, but comprising a ring standing proud on either side of the lug of the frame.
  • the plant according to the invention is intended to transfer from a station A to a station C, lower casting frames 1, and to perform a closure between these and upper frames 2 coming from a station B (see FIGS. 4 and 5).
  • the stations A and B may consist of molding machines.
  • the lower casting frames 1 are conveyed by gravity from the station A to the station C by means of a shallow slope rolling track formed by rollers 3.
  • the upper casting frames 2 pass from the station B to the station C while sliding horizontally on a rolling track formed by two rows of rollers 5.
  • These rows of rollers 5 are extended by two rows of rollers 6 in unit with a platform which is vertically displaceable in a supporting framework over the rolling track with rollers 3 and serving the purpose of transferring one half 2 of a mold over a half 1.
  • This supporting framework essentially comprises four uprights 7, 8, 9 and 10 firmly coupled in pairs by lower crossbars ll, 12, 13 and 14 and upper crossbars 15, 16, 17 and 18.
  • the displaceable transfer platform As for the displaceable transfer platform, it is apt to slide by means of sleeves 19, 20, 21 and 22 on vertical guiding rods 23, 24, 25 and 26 fastened to the framework.
  • the sleeves l9 and 20 are interconnected at their upper part by a tube 27 and at their lower part by an U-shaped yoke or stirrup 28.
  • the sleeves 20 and 21 are interconnected by means of two tubes 29 and 30, the sleeves 21 and 22 by means of tubes 31 and 32, and the sleeves 22 and 19 by means of tubes 33 and 34.
  • the rollers 5 they are installed on flat bars 35 carried by uprights 36 and 37 which are firmly joined to the framework by stays 38 and 39.
  • Shelves 40 and 41 carry bins containing, for example, studs 42 intended for insertion into the rings 43 in the lugs 44 close to the handles of the upper halves 2 of the molds, as illustrated in FIG. 1.
  • the ring of the lower halves 1 of the molds is marked 45 and the corresponding lug is marked 46 (see FIG. 3 in particular).
  • the rollers 3 are installed in freely rotatable manner in two angle-irons 47 and 48 firmly joined to the crossbars 12 and 14.
  • the tubes 29 and 33 are firmly joined by a crossbar 49 acted upon in its middle by a connecting rod 50 which has its other extremity connected to the rod 51 of a ram 52 fed for lifting purposes by a compressed air pipe 53 leading to the valve 54 of an electromagnetic valve 55 comprising two pipes (FIG.
  • the second pipe 56 of this electromagnetic valve is controlled by means ofa valve 57,
  • the pipe 56 for the lowering of the double-acting ram, which is apparent from FIG. 15, has not been illustrated in FIG. 1 to avoid complication.
  • the ram 52 is carried by a yoke comprising two oblique branches 58 and 59 which are secured to the corresponding crossbars l6 and 18 of the framework.
  • reinforcing plates 60 and 61 which are welded to the tube 27 on the one hand and to the corresponding guiding sleeves l9 and 21 on the other hand, are arranged at the point at which the transfer platform does not comprise a crossbar to allow of passage of the upper half 2 of the mold with its stud 42.
  • Tipping bars 62 and 63 carrying the rollers 6 are journaled at their extremities in a perforation wrought in a lug 64 welded to the displaceable platform.
  • earns 65 and 66 On the tipping bars 62 and 63 are installed earns 65 and 66, which remain to be dealt with further on, and which cooperate with vertical abutment rods 67 and 68 fastened on a crossbar 69 connecting the crossbar l6 and 18 of the framework.
  • Counterweights 70 and 71 tend to cause outward tipping of the bars 62 and 63 carrying the rollers 6 and the upward displacement of the earns 65 and 66 in unit with the said bars 62 and 63.
  • the electric control circuit comprises a supply line 72 with two conductors feeding the electromagnetic valve 55, a contactor 73 actuated by the tipping bar 62 carrying the rollers 6 and an end-of-travel contactor 74 whose pushrod 75 is actuated by the ring 43 of each upper half 2 of a mold.
  • This end-of-travel contactor 74 is supported by an adjustable-level horizontal bar 76 which is arranged in vertically displaceable manner by means of two sheaths 77 and 78 sliding on the guiding rods 79 and 80 fastened on the transfer platform.
  • the result thus obtained is that it is possible to adjust the position of the contactor 74 as a function of any prevailing height of the mold whose ring 43 is situated at greater or lesser height, and that too violent an impact of the bar 75 on the lug 44 of the upper half 2 of the mold is prevented at the end-oftravel position.
  • the contactor 73 which is arranged in series with the end-of-travel contactor 74 actuated by the ring 43 of the upper half 2 of the mold is closed by the pressure exerted on it in the vertical position of the rollers 6, by one of the tipping bars bearing the said rollers, that is to say the bar 62.
  • the closing of the contactor 73 coupled in series with the contactor 74 actuated by the upper half 2 of the mold-in fact by the ring 43 of the said mold-the framework carrying the transfer platform has arranged on it two abutment rods 67 and 68, each cooperating with a cam 65 respectively 66, in unit with one of the tipping bars 62, respectively 63, bearing the rollers 6 for support of the upper half2 of the mold.
  • FIG. 11 shows the bar 76 bearing the contactor 74 actuated by the molds.
  • this bar comprises two sheaths 77 and 78.
  • this contactor 74 is preceded by two magnetized ramps 81 and 82. A precise application of the ring 43 against the pushrod 75 of the contactor 74 it actuates, is thus obtaincd.
  • the plant Before placing the upper half 2 of the mold on the lower half 1, it is essential for this latter to be in a precise position allowing of insertion of the studs 42.
  • the plant comprises a device for positioning and keeping the molds in the closed position.
  • This device consists of two oblique ramps 83 and 84 guiding the rings 45 of the lower halves 1 of the molds and leading each of these into abutment against a bolt 85, respectively 86, arranged to tip downwards (FIG.
  • this positioning and holding device is preceded by a system 4 allowing of preliminary alignment of the halves l of the molds on the rolling track 3.
  • the rollered rolling track 3 is coordinated with a device for preliminary alignment of the lower halves of the molds which is formed (FIGS.
  • each aligning finger being in unit with a level branch 95, respectively 96, directed in the opposite direction to the lever branch coordinated with the other aligning finger, whereas the extremities of the two lever branches 95 and 96 directed in opposite directions are interconnected in articulated manner by means ofa linking bar 97.
  • the plant according to the invention operates by means of the double-acting ram 52 supplied through the pipe 53, for lifting purposes, and through a pipe 56, for lowering purposes, each of the said pipes being controlled by the valves 54 and 57 of the electromagnetic valve 55 illustrated in detail in FIG. 15.
  • this electromagnetic valve 55 comprise a moving core 98, comprising a rod 99 connected in jointed manner at 100 to a lever 101 equipped with a counterweight 102 and having two bosses 103 and 104 intended to exert thrust on the heads 105 and 106 for operation of the valves 57 and 54 feeding the pipes 56 and 53, respectively.
  • the cylindrical ring 45 is arranged in the lug 44 of the frame 1 while projecting from the same over a relatively substantial height allowing of the cooperation of the said ring 44 with the guiding and abutment means incorporated in the plant and allowing of the alignment and centering of the said frames at the different stations.
  • the projection of the ring 45 for the guiding and centering of the half 1 of the frame or mold on which it is fitted, does not reach the plane ofjunction with the half of the mold or molding frame with which it is coordinated.
  • the two bolts 85 and 86 release the closed mold 1, 2 which is then removed on the rolling track 3 while making room for the arrival at the positioning and holding station of another lower half 1 of a mold which had initially been aligned by the preliminary alignment device 4.
  • the abutment rods 67 and 68 cause the tipping of the cams 65 and 66 integral with the bars 62 and 63 carrying the rollers 6. Owing to this fact, these latter are placed in the vertical position again and are ready to receive the next upper part of a mold, the tipping bar 62 simultaneously having closed the contactor 73 arranged in series with the contactor 74. Accordingly, as soon as the contactor 74 is actuated by the next upper part 2 of a mold, the electromagnetic valve 55 will be reversed and another cycle will begin.
  • the uprights and crossbars could be formed by means of tubes rendering it possible to vary the spacing of the tipping bars carrying the supporting rollers.
  • different pneumatic switches could be incorporated for direct operation of the ram.
  • the positioning device also arranged l'or securing the lower halves of molds at the closing station could he wrought analogously to the station for preliminary alignment of the frames arranged on the shallowslope roller conveyor, the locking bolts being apt to have a different structure and to be actuated direct by a ram or the like, coming into action after the closing of the mold.
  • its pegging ring or eye projecting from the lug of the half of the mold or frame could have a different profile, for example an elliptical, polygonal or frustoconical single or double profile.
  • 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 sup ported 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.
  • Plant according to claim 1 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.
  • 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.
  • 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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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Devices For Molds (AREA)
US40053A 1969-06-03 1970-05-25 Plant for closure of foundry molds Expired - Lifetime US3640335A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR6918139A FR2048157A5 (es) 1969-06-03 1969-06-03

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US3640335A true US3640335A (en) 1972-02-08

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US40053A Expired - Lifetime US3640335A (en) 1969-06-03 1970-05-25 Plant for closure of foundry molds

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ES (1) ES380203A1 (es)
FR (1) FR2048157A5 (es)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3963395A (en) * 1974-02-25 1976-06-15 Automated Construction Industries, Inc. Mass production line for fabricating structural building members

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3017675A (en) * 1958-05-22 1962-01-23 Spo Inc Mold closer apparatus
US3506058A (en) * 1967-04-06 1970-04-14 Heatherwill Co Method of matchplate molding
US3516475A (en) * 1966-11-14 1970-06-23 Herman Pneumatic Machine Co Molding method and apparatus
US3517728A (en) * 1967-09-18 1970-06-30 Kelsey Hayes Co Apparatus for making castings

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3017675A (en) * 1958-05-22 1962-01-23 Spo Inc Mold closer apparatus
US3516475A (en) * 1966-11-14 1970-06-23 Herman Pneumatic Machine Co Molding method and apparatus
US3506058A (en) * 1967-04-06 1970-04-14 Heatherwill Co Method of matchplate molding
US3517728A (en) * 1967-09-18 1970-06-30 Kelsey Hayes Co Apparatus for making castings

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3963395A (en) * 1974-02-25 1976-06-15 Automated Construction Industries, Inc. Mass production line for fabricating structural building members

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Publication number Publication date
ES380203A1 (es) 1972-08-16
FR2048157A5 (es) 1971-03-19

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