US1533383A - Molding-sand-handling machine - Google Patents

Description

April 14, 1925. 1,533,383

' D. J. CAMPBELL MOLDING SAND HANDLING MACHINE Sheets-Sheet 1 Filed'N ov. 13. 1922 v I 4 8 18 I 4 1/ lmmrflov Donmd J. Gumpbeil B April 14, 1925. 1,533,383

D. J. CAMPBELL MOLDING SAND HANDLING MACHINE [/50 I Filed Nov. '15, 1922 5 SheeFs-Sheet 2 j 52 J '2 Hlll" lHlH- 1| 1 29 r 76 InucnTor 7 i 55 69 Donaid J. Campbell BL 70 f 5 Sheets-Sheet 5 Invenfor Donmd J.G0mpbe\\ meg D. J. CAMPBELL MOLDING SAND HANDLING MACHINE Filed Nov. 13

April 14, 1925.

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April 14, 1925.

' Filed Nov. 13 1922 5 Sheets-Sheet 4 .93 as G (D 46 49 Inucnior A Donald J.-(3ampbe\\ April 14, 1925.

D. J. CAMPBELL MOLDING SAND HANDLING MACHINE Filed Nov. 13 1922 5 Sheets-Sheet 5 m kl n e U n L bell Patented Apr. 14-, 192 5.

FFICE i DONALD J. CAMPBELL, OE IvIUSKEGUN IEEZIGFITE; MICHIGAN.

MOLDING-SANFJ@ ANBLING MACHINE.

Application filed November 13, 1922. Serial No. 600,687.

To (a l whom it may concern.

Be it known that I, DQNALD J. Canrnnrn, a citizen of the United States of America, residing at Muslzegon l'leights in the county of Mushegon and State of lllichigan, have invented certain new and useful Inn provements in Molding-Sand-Handling Machines;-and I do hereby declare the following to be a full, clear, and enact description of the invention, such as will enable others skilled in the art to which it appertains to make and use they same.

This invention relates to molding machines wherein sand is projected from the machine in snnrll quantities and at very short intervals from the machine into any convenient flask and around the pattern thereof. Essentially the machine consists of arapidly rotating sand throwing wheel coupled with means for continuously feeding the sand at uniform ate thereto, means being used for what is a practically continuous measured supply of the sand to the sand throwing; wheel. To accomplish this a novel organization of mechanisms is supplied, ineluding certain novel arrangements of parts, and associations and combinations of operating; elements for the completeand practical embodiment of the invention for attaining the ends'stated, as 'well as i'nany other not at this time specifically outlined, but whichwill appear as understanding of the invention is had from the following description, taken in connection with the ac companying drawings, in which,

Fig, 1 .is a vertical section through the machine of my invention.

Fig. 2 is'a side elevation of the machine with parts in section to disclose covered mechanism. I Fig. 3 isa fragmentary elevation and eec- .tion on the line 3--3, of Fig. 4-, showing the sand riddling or shaker mechanism of the machine.

Figs. t and 5 are horizontal sections on lines -l l, and '55, of Fig. 1, respectively, looking downwardly as indicated by the arrows.

6 is an enlarged vertical section through the lower end portion of the machine where the sand throwing wheel is mountechand Figs. 7 and 8 are horizontal sections on lines 7'? and 88, of Fig. 6, looking downwardly asindicated.

Like references refer to like parts in the different figures of the drawings.

In the construction of the molding ma-. chine, a bin 1 for the containing of molding sand is supported in any suitable manner from overhead, having downwardly con verging sides at the lower portion of which the same are formed intopartly cylindricalform with an outlet opening to the binat the lower edges of. said sides, said curved partly cylindrical portions being indicated at 2. A shaft is rotatably mounted across and between the other vertical sides of the bin, from which a. plurality of equally spaced vanes project. The shaft andvanes are located between the parts 2, as shown in Fig. 1.

Supporting irons 5, preferably ofangle formation, indicated at .3, depend from the overhead support and extend at their lower 7 ends to slightly below the lower endof the bin. At a distance above their lower ends a supporting frame is horizontally positioned and connected thereto, including bars 6 and 7, with a bar 8 paralleling the bar 7, as shown in Fig. 4. A variable speed electric motor 9 is secured on this frame near one end of the bars 7 and 8. The shaft of this motor drives a belt 10 which passes around and drives a shaft 11 mounted in bearings 12 attached to the bar 8, on which shaft a worm 13 is lined which meshes with a. worm wheel 14 fixed on the end of the shaft 3. It is obvious that when the motor 9 is running, shaft 3 with attached vanes l is turned at relatively low speed and measured quantities of sand are taken from the bin anddelivered from the lower end thereof at intervals, or as fast as the shaft 8 turns the vanes :across the lower end of the bin .to a bring the sand betweeuany two vanes to theopening at the lower end of said bin.

Below the lower cud of :the bin a sand riddle is mounted, comprising an open frame 15 of sheet metahacross thebottom of which a screen 16 is secured. The riddle, at one side, is suspended bylinlqs 17 attached thereto from a rod 18 carried by said frame. At its opposite side antarni 19 is pivot-ally cimnccted thereto, said arm bcing secured at its opposite end to a rodBO, rotatal'ily mounted in the outeu ends of short brackets 21 whichare secured toraud projectifrom onesi-de of the sand bin. A second arm 92 is fixed to therochQO and to extend a distance below its outer end one end of a rod 23 is pivot-ally connected, at its other end connecting with an eccentric housing 24 which passes around an eccentric 25 on the shaft 11. The rota tion of the shaft 11, reciprocates the rod 23, with a consequentrocking of shaft or rod 20 and a continuous back and forth shaking of the riddle, whereby the sand delivered from tl bin to the riddle is sifted or riddled, dropping through the screen 16, as

rality of headed rods 29, threaded at their lower portions pass through the ring 27 and the same, the threaded portions passing through'the corners of a frame 30 of rectangular outline which is thus supported below the ring 27 and adjustably mounted with respect thereto.

Within the frame 30, a secondframe of similar outline but smaller is located, indicated at 31 and at its opposite sides is mounted on studs 32 carried by the frame 30. A third rectangular frame is located within the second frame 31 and has studs passing through two opposite sides into'the sides of said frame 31. Studs 32 and are located at right angles to each other so that it is apparent that the mechanisms carried by and suspended fromthe inner frame 33 have practically a universal pivotal movementat the upper end due to this form of mounting described and best shown in Fig. 5.

The frame is located directly below the riddle, and in fact in the adjustn'ient of t extend downwardly within the said frame 33. An integrally formed funnel-like downward extension to the frame 83 is made, having converging sides, as indicated at 35, at its lower end joining with the upper end of a relatively long hollow tube 36 through clog or be stopped in the tube in its dowin ward movement.

The lower end of the tube 36 enters into an upwardlyprojecting sleeve 37 cast on a housing 38, and said sleeve is clan'iped to the tube. The housing 38 is hollow and in it a,

short conveyer of the screw type and mechanism to operate it is housed, one end of the housing being open for the reception of the oonveyer, being afterward closed by an ad- 118 outer frame 30 upwardly, said riddle may ditional housing member 39 which houses driving mechanism and which is secured to the housing 38 by cap screws 40.

A sleeve 41 is located horizontally in the housing 38 below the lower end of the tube 36, openings being made for sand passage from the tube thereto. A. shaft 42 extends lengthwise of the sleeve and into the additional housing 89, on which a short screw conveyor 43 is mounted. This conveyerdoes not extend to the end of the housing 38 at one end, a passage being left through which sand drops to be thrown outwardly by the sand projecting wheel. A plate 44- is located across the sleeve 41 at or adjacent its opposite end, shaft 42 passing theretln'ou'gh, and suitable packing 45 is located against the plate to preclude sand passage to the bearings 46 in housing 39 in which the shaft 12 is mounted.

A worm wheel 47 l is fixed on the shaft 42 and is in engagement with a vorm L8 on a tical shaft 53 located alongside of the tube 36. It is apparent that when shaft 58 is driven, the conveyor 43 is turned at com- 9 paratlvely slow speed so as to carry the sand dropped into the tube 36 away and deliver it to the outlet passage in the housing 38 for passage to the rotating sand throwing wheel.

Shaft 58 extends nearly to the upper end of the tube 36 and at its upper end is pro-' vided with a gear '54. which is in driving engagement with a gear 55. Gear 55, together with a sprocket wheel 56 is fixed on a shaft 57 mounted within a housing 58 which is used to house the mechanism at the upper end of the shaft 53 and into whichsaid shaft enters from below. A chain 59 passes around the wheel 56"and also around a second wheel 60 which is secured within the housing 58 on the shaft 61 0f an electric motor 62 which furnishes the motive power for driving-the mechanism just described.

The motor is carried by a bracket support 63 which is connected to the tube 36 together with a control box 64 for controlling the electric currents for running the motors U and 62. The electric connections from the control box to motor 62 are encased in a cable 65, those to the motor 9 in a cable 66, and a third cable 67 leads from the ho to a circuit closing'and breaking switch 68 which is mounted at a side of a housing 69 depending from and integral with the housing 38 and in which the sand projecting wheel is mounted. The switch is conveniently positioned above one of the handles 71 on the housing 69 so as to be r adily operated when the operator of the machine has grasped lll the handle to swing it to a'desired position.

The housing 69-hasan outlet 70 through which the sand passcsand the handles are positioned vertically alongside :the "outlet as shown.

Housing 69 is practicallyof cylindrical form except for "outletwportion, thereof.

One end is furnished bya detachable plate 69, which lS'l'B'ID'OVilblG for assembly and for inspection or repairotthe mechanism within the. housing. Above the outlet 70, a curvedsector or part of the curved sides of the housing is made separate from the remainder, as-indieated at 72,being pivotally connected thereto-at 73 ,its upper end having an opening for the passage of a bolt '74; which is attached to a-ndiproj-ects from the end of the housinsr 3S and at the; outer end of which a nutcz't is carried, a spring .75 around the bolt being interposed between the nut and end of the-part 72 servingto normally hold it in closed position, but

yielding at times when necessary'toavoid .breal-tag'e as will be later described.

A shafti'fi'extends into the housing' (if) at one side thereof, being" mounted 111'l)&1-

ings "T'Zlocated in a laterally extending sleeve 78 to the housing--69. A head TQis hired on the end of shaft 76 within the housing (59 and the same-is -COVQPQ-ilW1l3l1 a nien'iber 8O -atits outer end and around its curvul sides,

from which member a number of :equally spaced fiiigersfil project which are the full width of the head 79 and the inen'ilzer till tlier eover. Thewhcad 79 has an annular recess in its uncovcred en-d into which a sleeve integral with the housing 43!.) projects serving as a guard against sand coming to the bearings 77.

no at the end thereof opposite to that at which the head 79 is attached with which another gear til has engagement. The [gear 8% is fixed on shaft and housed-together ivith the gear 83 inia housing 85 at the end of the sleeve 78, the housing; having a removable le 86. as shown in Fig. 8, for assembly, inspection or repair of the gearing just described. Shaft is continued belowthe housing 38 and enters housing 85 from above. lhe ends of the lingers 81 come nearly to the curved walls of the housing 69 and at the sand inlet to the housing 69 a plate 87 is seeured on the inner sideoftlie housing. and a similar plate 88 is secured substantiall opposite at the sand outlet. the ends (it the ling-ers gl coining closely adjacent the same in their rotation.

The passage for the. sand from the conveyer -43 to the sand throwing wheel and located atthe end of the housing 38 is given an air inlet at its u per end, an opening being made, through said housing 38 into which a sleeve 89 is threaded, the inner e d of which is formed as a seat for a. valve .71 are grasped and the lower end ot the apparatus swungover the flash to he tilled. so as to direct thesand to any part thereof and around the pattern. The circuit closed by operating'the switch at (Sthwhcreupon both'n'iotors (i2 and 9 start with a feeding of the sand from the bin 1 .to the tube 86 and a riddlingol the sand before passage to said tube, and a feeding of the sand in tube 36 to the sand projectii'ig or throwing wheel by which it is thrown outward through the outlet 70 intothe flash andCaround the pattern. There is a continuous and steady supply of sand to the conveyor teed member t3 and the sand is supplied in uniform and continuous amount to the wheel 60, the fingers taking small quantities in rapid succession andthrowing it into the flash. ()wing; to the high spec-d of rotation of the wheel 80, avacuuin is lihelv to be n'oduc-cd in the sand inlet passage from the conveyor to the wheel and the air valve 90 opens under the outside pressureo'l air which enters at the upper part of the passage and helps in moving the sand downward to the sand throwing wheel. The operatorniovcs the lower CllQlwOf the apparatus over the flask to ditl'crent positions as desired to till the same and'compact the sand around the pattern, continuing until the flask is tilled, whereupon the switch at 68 is operated to stop the motors and any further projection ot the sand.

The mounting of the sector 72 with a pivotal connection and with a spring yielding closure (at the section is a .sa: guard against breakage should an 3* chunks or pieces of foreign material in the sand come to the wheel and have a tendency to force the sector outward. The sand is riddled illltOHiEtlllCElll) with its taking from the bin 1 and the liability of foreign matter in the sand, or hard pieces or lumps therein is practically obviated.

The particular feature of utility in this molding' machine the steady. uniform and continuous passage of sand towthe sand throwing wheel. vlhesupply to the wheel is made by a continuousconveyor feed which is uniform, and there is always a supply for the conveyor delivered by the vanes a to the riddle. This insures even teed to the sand throwing wheel, without any variations in supply. The lingers engage the sand This valve as fed thereto, throwing small quantities of the sand in uniform, even and rapid successlon into the flask.

The machine is practical, durable and efficient. The appended claims define the invention which is to be considered as comprehensive of all forms of structure coming within their scope.

I claim: I

1. In a machine of the class described, a sand holding bin having a delivery opening in its lower side, means for delivering measured quantities of sand from the bin through said opening, a circular track mounted around and adjacent the lower part of the bin, a ring movably mounted on the track to move about a vertical axis, a frame supported-by and below the ring, a second frame within the first frame mounted thereon to turn about a horizontal axis, a third frame within the second frame mounted to turn about a horizontal axis at right angles to the first mentioned horizontal axis, a downwardly extending extension to the third frame having converging sides, a tube connected to and depending from the lower end of said extension, a housing connected to the lower end of the tube, a screw conveyor in said housing located horizontally across the lower end of the tube, an extension to the housing below the conveyer having an outlet and an inlet into which the conveyor moves sand from the tube, and a sand throwingwheel rotatably mounted in the said housing extension and formed with outwardly projecting fingers for engaging with the sand fed thereto to throw the same outwardly through the outlet, substantially as described.

2. A construction containing the elements in combination defined in claim 1, combined with a shaft mounted alongside the tube, gearing connections between the shaft and the conveyer, gearing connections between the shaft and the sand throwing wheel, and means carried on the tube near its upper end connected with the shaft to drive the same, substantially as described.

3. In a machine of the class described, a sand holding bin having a delivery opening at its lower side, means for. delivering measured quantities of sand from the bin through said opening, a. motor for driving said delivering means, a tube suspended vertically below the opening in the bin, aid tube at its upper end having a member with downwardly converging sides attached thereto, said member being open at its upper side, a sand riddlemovably suspended between the bin and said'member into which the sand is delivered, a. shaftdriven by the motor, means connecting the shaft and. riddle to shake the riddle back and forth with rotation of the shaft, and means at the lower end of the tube for throwing the sand in small amounts and in quick succession into a flask, substantially as described.

t. In a machine of the character described, a vertically positioned tube, a housing at the lower end of the tube having a horizontal interior bore therein, a screw conveyor mounted in said bore at the lower end of the tube, said housing'having an outlet at one end thereof, means carried on the housing for driving the conve cr, a second housing located below and connected with the. first housing having an inlet opening communicating with the outlet of the first housing,

and an outlet extending downwardly at one side thereof, a sand throwing wheel mounted in the second housing and means for driv-- ing the said wheel.

5. In a machine of the class described, a vertically positioned tube, a housing at the lower end of the tube, a short screw conveyer located horizontally across the lower end of the tube and within the housing, a second housing located below the first housing, a sand throwing wheel mounted in said second housing, said second housing having a. downwardly extending outlet at one side and an inlet communicating with the chamber in the first housing in which the conveyor is located, amotor located adjacent the upper end of the tube, a shaft driven by the motor and located lengthwise of and outside of the tube, and gearing connections between said screw conveyer and sand throwing wheel and said shaft for driving the same by the shaft.

6. In a machine of the class described, a sand holdingbin, means for discharging measured quantities of sand from the lower side of the bin, a sand riddle movably mounted below the lower end of the bin, an

elongated tube carried below the sand riddle, a housing secured to the lower end of the tube, a short screw conveyor mounted horizontally'within the housing at the lower end of the tube, a second housing below the first housing, a sand throwing wheel mounted for rotation in said second housing, there being communication between the two housings for the passage of sand, and said second housing having an outlet at one side, a motor carried adjacent the upper end of the tube means for driving the conveyer and sand throwing wheel from said motor, a second motor, and means for driving said sand discharging means and moving the sand riddle from said second motor. I

In testimony whereof I affix my signature. I

DONALD J. CAMPBELL.

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