US534415A - Molding-machine - Google Patents

Description

(No Model.)

MOLDING MACHINE.

No. 534,415. Patented Feb. 19, 1895.

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P. P. WALSTBOM. MOLDING MAGHINE.

No. 534,415. Patented Feb. 19, 1895.

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' Ni'rrzn STATES PATENT Orrin.

PETER FREDRIOK WALSTROM, or BIRMINGHAM, ALABAMA.

MOLDING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 534,415, dated February 19, 18 95.

Application filed November 22, 1893- Serialll'o. 491,649. (No model.)

To all whom, it may concern:

Be it known that I, PETER FREDRICK WAL- STROM, a citizen of the United States, residing at Birmingham, in the county of Jefferson and State of Alabama, have invented certain new and useful Improvements in Molding-Machines; and I do hereby declarethe following to be a full, clear, and exact description of the invention, si'i'ch 'as will enable others skilled in the art to which it appertains to are, first, to provide a molding machine of that kind which will be simply and cheaply operated, all the parts performing their duties in the most direct manner, and so arranged as not liable to get out of order; second, to afford facilities to perform the various parts of the work, as the pressing of the molds, the filling of the flask with sand, the removal of the pressed mold, and the placing of the empty flask on the machine all at the same time, thereby facilitating the rapidity by which the molds can be formed; third, to provideanovel and simple device for applying power to the pressing plunger, to press the sand in the mold, and to provide for the withdrawal of the patterns from the mold before the removal of the flasks, thereby preventing the breaking of the mold by. the removal of the flask from the table; fourth, to provide a power riddle for the sand, and a conveyor to elevate the sand when riddled from the riddle to a receiving bin, the receiving bin provided with an adjustable delivery chute, to.

deliver the exact quantity of sand to each flask as needed in rotation as the flaskscome under the chute. I attain these objects by the mechanism illustrated in the accompanying drawings, in which,-

Figure 1, is a vertical side view of my molding machine. Fig. 2, is across sectional view of the same through the center of the column and sand bin, the molding tables left off the arms of the turn table. Fig. 3, is a top view of the molding machine, as shown in Fig. 1. Fig. 4, is an enlarged vertical View of one of the cams, and the pitman connecting the cam and the pressing plunger. Fig. 5, is a cross sectional view of the same through the center. Fig. 6, is an enlarged sectional side view of the cam, and part of the pitman to operate the sand riddle. Fig. 7, is an enlarged vertical longitudinal sectional view of one of the molding tables through the center. Fig. 8, is a cross sectional view of the same through the center. Fig. 9, is a horizontal sectional view through the center of the shaft in molding table. Fig. 10, is an end view of one of the molding tables, showing the hand lever, ratchet wheel, and cam to operate the shaft. Fig. 11, is a top ,view of the inside frame to operate the top plate of the molding table.

Fig. 12, is an enlarged view of one of the cams to operate the inside frame.

Similar, numerals refer to similar parts throughout the several views.

The base plate 1 is made of cast iron, and has formed on it a raised track or way 2 for a turn table to operate on. The turn table 3 is made of cast iron, or other suitable material. It is provided with a hub from which a series of arms radiate extending outward at equal distances, the arms provided at their ends with box like formations 4, 4, 4, 4, to which the molding tables are secured by bolts. The arms on the under side are connected together by a web havingagroove 5 on its under side to fit the raised way on the base plate, the whole forming a turn table on which the web carrying the arms revolves freely.

A metallic column 6 is secured to the base plate, the column extending upward through the hub of the turn table. The columnis provided with a cap, as shown. A metallic web column 7 is secured near the end of the base plate. Both columns are connected together by two metallic I beams 8. 8 secured to the columns in any suitable manner. On the beams over the column 6a metallic plate 9 is secured, one end of the plate extending over the beam and having a square aperture with flanges formed on its sides, to receive the sand bin 10. The sand bin is made of wood, or

operated with hand levers 14. 14. hen the chute is full of sand, the closing of the top gate and opening of the bottom gate, allows the sand between the gates to descend to fill the flask.

The main shaft is journaled in suitable bearings 16. 16 formed in the beams. The shaft has secured on it a gear wheel 17 and two cams 18. 18, the cams provided with pitmen 19. 19 connecting the cams with a pressing plunger 20, the plunger operating between guides 21. 21 attached to the back column. A shaft 22 is journaled in bearings 23. 23 se cured on the beams. The shaft has secured on it a small gear wheel 24 connecting with gear 17, and a friction wheel 25 secured on the shaft. A shaft 26 is journaled in bearings 27.27 secured to the beams. The shaftis provided with a small friction wheel 28 conmeeting with friction wheel 25, and adriving pulley 29 secured on the shaft. A hand lever 30 is pivoted on one of the beams, the lever having a yoke 31 at its upper end embracing the beam. The upper edge of the yoke coming in contact with the bearing 27, when the lever is pushed back as shown by dotted lines forces the bearing forward, and brings the friction wheels in contact to put the machinery in motion, a slight amount of sliding play being allowed between the bearing and beam for that purpose.

A metallic conveyer boot 32 is placed below the line of the floor. It is provided with a sprocket wheel 33 secured on a shaft 34, the

shaft journaled in bearings 35. 35 formed in the boot. The bottom of the boot 36 extends backward and upward at an angle to a frame 37 to which itis attached. On the upper side of the frame, a sand riddle 38 is attached by swing pivots 39. 39. 39. 39. The sand riddle is provided with a bifurcated bracket 40 having a connecting rod 41 extending from the bracket to a cam 42 the cam attached to a pulley 43 journaled on a stud in the side of the back column. The pulley is connected by a belt 44 to a pulley 45 secured on the end of the driving shaft26. The driving shaft communicating a revolving motion to pulley 43 shakes the riddle, by the aid of the cam and connecting rod.

On the back of the sand bin are placedtwo framing pieces 46. 46, to which are secured in the usual manner two metallic hangers 47. 47 having bearings 48. 48, in which a shaft 49 provided with a sprocket wheel 50 is journaled. On the outer end of the shaft driving pulleys 51. 51 are placed. The sprocket wheels 33 and 50 are provided with a carrier chain 52 to which is attached a series of buckets 53. The elevator when put in motion by the rotation of the driving pulley, elevates the sand as shifted and delivers it in the sand bin to be used as needed.

The sides or frame of the molding tables 54. 54. 54. 54 are made of cast iron, preferably in separate pieces bolted together as shown. The top part of the frame 55. 55. 55. 55 is made separate and connected to the bottom frame by flanges and bolts. The bottom plates of the frame are connected to the box formations on the ends of the turn table arms. Shaft bearings 56. 56 are formed in the end plates of the bottoni frame, in which a shaft 57 is journaled. Guides 58. 58 are formed on the inside of the bottom frame. A metallic elevating frame 59 is placed in the guides. The frame is provided with square recesses having a series of adjustable gibs 60 at both ends. The shaft 50 is provided with two cams 61. 61 operating in the recesses between the gibs, the rotation of the shaft operating the elevating frame by the movement of the cams.

The molding tables when used to mold sash weights, have a series of metallic patterns 62 connected together by bars 63. 63, the bars connected to the elevating frame by bolts 64. 64. The connection is made in this manner to facilitate the changing of the patterns. A metallic top plate 65 is provided with a series of apertures for the patterns to pass through. The plate is made to fit inside the outside frame, and it is supported on an inside frame 66 made of cast iron formed as shown by Fig. 11. The frame has flanges 67. 67 on both ends, the flanges extending through apertures in the outside end frames. The flanges are provided on their under sides with gibs 68. 68. On the shaft under the gibs are two cams 69. 69 outside the frame. The inside frame resting on the cams supports the frame and top plate, assisted by the ends of the elevating frame when the mold is pressing.

At one end of the shaft outside the cam a ratchet wheel 70 issecured to the shaft. Outside the ratchet wheel a hand lever 71 is placed on the shaft. The hand lever is held to place by a collar 72. The hand lever is provided with a pawl 73 held to place in the ratchet wheel by a spring 74. The movement of the hand lever one fourth of a revolution as shown by dotted lines, when drawn back, revolves the shaft one fourth of a revolution drawing the patterns down one half the throw of the inside cams. The outside cams having no throw on the first quarter of the shaft revolution, hold the inside frame and top plate to place. The inside and outside cams having the same throw on the next fourth of the revolution, draw the patterns and top plate down at the same time to clear the sand of the mold. The remaining half of the shaft revolution reverses and elevates the patterns and top plate in the reverse manner. The corners of the inside elevating frame coming in contact with the inside frame helps to elevate it on the last fourth of the revolution, and remains in contact with it until the pressin g is completed.

On the base plate 1 two wedge shaped elevations 75. 75 are formed. A sliding frame 76 carrying reverse wedges is placed over them. The sliding frame is operated by a hand lever 77 pivoted to the base plate. Before pressing ICC IIO

the mold the sliding frame and wedges are forced by the lever under the elevating-frame 59, the wedges supporting the frame while pressing. The wedges when released allow the molding tables to freely revolve on the turn table to bring another flask under the pressing plunger.

A flask 78 is placed on the top of each table before it reaches the sand chute. The flask is held to place by flask pins 7 9. 79 inserted in the rim of the molding table frame. On the top of the flask a loose box 80 is placed, to keep the sand from spilling over the edges of the flask. As the flasks are filled the turn table is revolved bringing the full flask under the pressing plunger, the pressing of one flask, the filling of another with sand, the removal of a pressed flask, and the placing of an empty flask on one of the tables, all taking place at the same time.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In a molding machine, the combination of a main frame provided with a series of molding tables attached to a turn table, movable molding flasks placed on themolding tables, a sand receptacle attached to the main frame A the sand receptacle provided with a chute extending downward to deliver sand to the flasks, a main shaft journaled in bearings on the main frame the shaft provided-with a gear wheel and cams, two connecting rods connectingthe cams with a pressing plunger, an intermediate shaft journaled in hearings on the frame the shaft provided with a gear Wheel and a friction wheel, a driving shaft journaled in bearings on the frame the shaft provided with a friction Wheel and'a driving pulley, ahand lever pivoted on the frame to bring the friction wheels in contact to operate the pressing plunger, substantially as shown and described.

s 2. In a molding machine, the combination of a base and main frame provided with a series of molding tables attached to a turn table, a main shaft provided with a gear wheel and cams pitmen connecting the cams to a pressing plunger, an intermediate shaft, provided with a gear and a friction wheel, a driving shaft provided'with a friction wheel and driving pulley, a hand lever pivoted on the frame to bring the friction wheel in contact to start the machinery, substantially as described.

3. In a molding machine, the combination of a main frame provided with a series of molding tables attached to a turn table, movable molding flasks placed on the molding tables, a sand riddle suspended on swing pivots to a frame having an inclined chute from the frame to an elevator boot, a connecting rod connect-ing the riddle with a cam on a pulley vator buckets attached to the chains to elevate the sand from the boot to the sand receptacle, the sand receptacle provided with a chute to deliver sand to the flasks, a main shaft provided with a gear wheel and cams,

two connecting rodsconnecting the cams with I apressing plunger, an intermediate shaft provided with a gear wheel and a friction wheel,

a driving shaft provided with a friction wheel a driving pulley and a pulley to operate the sand riddle, a hand lever pivoted on the frame to bring the friction wheels in contact to op erate the pressing plunger, substantially as shown and described.

4. Ina table for a molding machine having an outside frame with an inner frame supporting the top plate of the table, flanges provided with gibs on the ends of the inner frame, extending through apertures formed in the outer frame, a shaft journaled in bearings formed in the frame, and cams secured on the shaft under the flanges adapted to operate the frame and raise and lower the top an outside frame with guides formed on the inside of the-ends, an elevating frame attached to the patterns, operating in the guides, a top plate attached to an inside frame having flanges on the ends extending through apertures on the outside'frame, a shaft journaled in bearings formed in the outside frame, having cams on the inside to operate the pattern frame and cams on the outside to operate the plate frame, and the shaft, rotated to operate the cams, with a hand lever, ratchet wheel and pawl substantially as described.

6. A molding machine having a base plate, main frame, pressing plunger and means to operate the plunger, a series of molding tables attached to a turn table, frames with patterns attached, operating in guides formed inthe frame of each table, and wedges formed on the base plate, having reverse-wedges operating over them, moved by a lever pivoted in I PETER FREDRICK WA LSTROM;

Witnesses: l

J. L. YANOEY, O. L. DRAKE.

ITO

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