US1086117A - Molding-machine. - Google Patents

Description

A. M. ZIMMERMAN.

MOLDING MACHINE.

APPLICATION FILED MAR.13,' 191a Patented Feb. 3, 1914.

4 SHEETSSHEB'I; 1.

IN VEZVTOR Wm M 44/ Attorney COLUMBIA PLANOORAPH c0.. WASHINGTON. D. c.

A. M. ZIMMERMAN.

MOLDING MACHINE. APPLICATION FILED MAR. 13, 1913.

Patented Feb. 3, 1914.

4 SHEETSSEEET 2.

INIVENTOR W TNESSES Maw A Home COLUMBIA PLANOG RAPH co.. WASHINGTON. n. c.

A. M. ZIMMERMAN.

MOLDING MACHINE. APPLICATION FILED MAR. 13, 1913 1,086, 1 1 7. Patented Feb. 3, 1914.

4 SHEETS-SHEET 3.

[N VEN TOR A Home COLUMBIA PLANOGRAPH c0.. WASHINGTON, D. c.

A. M. ZIMMERMAN.

MOLDING MACHINE.

APPLIGATION FILED MA-R.13, 1913.

1 ,086, 1 1 7, Patented Feb. 3, 1914.

4 SHEETS-SHEET 4.

WITNESSES /NVENTOR "6. j I Allorney COLUMBIA PLANDCIRAPH COU'WASHINGTON. D c..

ABRAHAM M. ZIMMERMAN, 0F LANCASTER, PENNSYLVANIA.

MOLDING-MACHINE.

[0 all whom it may concern:

Be it known that I, ABRAHAM M. ZIMMER- MAN, a citizen of the United States, residing at Lancaster, in the county of Lancaster and State of Pennsylvania, have invented certain new and useful Improvements in l/lolding-lilachines; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to improvements in molding machines, one object of the invention being to so construct the machine that' a presser table can be maintained in a horizontal position during all of its movements.

A further object is to so construct the machine that one table can be moved perpendicularly with respect to the other table, and so that the two tables can then be turned over with the molding devices between them, and subsequently separated and the previouslysuperimposed table moved forwardly without tilting the same or the molding members thereon.

With these and other objects in view, the invention consists in certain novel features of construction and combinations of parts as hereinafter set forth and pointed out in the claims.

In the accompanying drawings; Figure 1 is a side elevation of a molding machine embodying my improvements and showing the first positions of the parts; Fig. 2 is a similar view showing the parts in their second positions; Fig. 3 is a sectional view with the parts in the third position; Fig. i is a sectional view showing the parts in the fourth position; Fig. 5 is a front elevation; Fig. 6 is a sectional view of the upper table; Fig. 7 is a sectional view of the lower table, and Figs. 8, 9, 10 and 11 are views illustrating the ratchet devices.

1 represents a main frame comprising two uprights 2-3 connected by a cross bar 4, and said frame is mounted on wheels 4; to permit the machine to be portable. Disposed within the main frame 1 and located adjacent to the uprights 23 thereof, are two rocking frames 5, connected by a tie rod 6 and having journals 7 mounted in suitable bearing boxes 8 secured tothe uprights 2-3. One of the journals is extended beyond its bearing and has secured thereto, one or more levers 9 to provide means for manually rocking the frames 5 and the parts Specification of Letters Patent.

Application filed March 13, 1913.

Patented Feb. 3, 1914. Serial No. 754,068. 1

carried thereby and thus constitute reversing means for the tables as hereinafter explained.

For convenience in describing the construction of the working parts of the machine, it will be assumed that the parts are disposed as shown in Fig. 1, which may be termed the first or starting position. Between the lower portions of the rockmg frames 5, a lower table 10 is located. This table comprises two parallel tubes 11 secured at their ends in bosses located at the lower ends of the rocking frames 5, and angle bars or braces 12 secured to saidtubes by means of suitable clips 13. On the table 10, the molding devices will be located as hereinafter explained. Shafts 1e are mounted in the tubes and to the projecting ends of these shafts, crank arms 15 are secured, there being two such crank arms at each end of the table 10. Rods or links 16 are pivotally connected at their lower ends to the free ends of the crank arms 15 and at their upper ends, said rods or links are pivotally attached to respective ends of an upper or presser table 17 at the four corners of the latter. The press-er table comprises two angle bars 18 connected at their ends by cross-heads or end members 19. The table 17 is intended to receive a presser board 20 suitably spaced from its under side by means of blocks 21, and secured to the table by means of bolts 22 engaging cross bars 23,- the latter resting on ledges 2 1, on the inner faces of the angle bars 18, as shown in Figs. 5 and 6. It is apparent that by thus mounting the presser table on four pivoted rods or links, said table and the presser board attached thereto can be swung forwardly and rearwardly and insure the maintenance of the same in a true horizontal or level plane, and by connecting said rods or links with the crank arms of revoluble shafts mounted in the lower table, said presser table can be moved in a vertical direction relatively to the lower table without danger of disturbing the horizontal or level disposition of the said presser table. Thus, the presser board attached to the upper table can be lowered squarely upon the molding devices on the lower table, and, after the tables shall have been reversed, as hereinafter explained, the presser table can be moved away from the lower table and afterward, said presser table (then carrying the molds) can be moved forwardly without disturbing the horizontal or level disposition of said presser table and the molds thereon.

In order to insure the proper positioning of the presser table over the lower table and the accurate guiding of the former during its vertical movements, the rocking frames 5 are provided on their inner faces with guide ribs 25 and the presser table is provided at its ends with spaced lugs 26-27 to ride on said ribs,-the lugs 27 being made to depend below the ribs 26 so as to constitute stops 28 which engage the upper ends of the guide ribs 25 and thus accurately position the presser table when the same is moved from the position shown in Fig. 1 to the position shown in Fig. 2.

It is the intention to dispose the presser table in the position shown in Fig. 1 while the molding devices are being arranged on the lower table so that it will be out of the way of the operator, and in order that the presser table shall be held in such position, a latch 29 is provided and pivoted to one of the rocking frames 5. This latch is made in the form of an approximate L-shaped lever provided at the end of one arm with a tooth 30 to engage a tooth or lug 31 on one of the crank arms 15, as shown in Fig. 1, and the other arm 32 of said latch projects upwardly (in Fig. 1) from the pivotal support of said latch, so as to be in the path of a pin 33 which projects laterally from one of the rods or links 16.

A shaft 34 in the presser table 17 and provided at its respective ends with crank arms 85, the latter being connected by means of links 36 with the forward supporting rods or links 16 of the presser table. The shaft 34 is also provided with an operating lever 37, the manipulation of which (when the parts are in the positions shown in Fig. 1) will cause the presser table to be swung upwardly and forwardly in the arc of a circle (the rods or links 16 turning on their pivotal. connections with said presser table and the crank arms 15) and the presser table will become disposed in position between the rocking frames 5 and directly over the lower table, ready to be lowered onto the molding devices on said lower table, as shown in Fig. 2. During this manipulation of the presser table, as well as during the downward pressing operation of the latter (as hereinafter explained) and the subsequent movement of the presser table downwardly from the other table, the rock ing frames must be held stationary. For this purpose, latch devices which will now be explained, will be employed.

A latch lever 37 is pivotally supported between its ends in the upper portion of the stationary framework and having its longer and heavier arm supported on a lug 38 which also projects from the framework. The longer arm of the latch 37- is provided is provided with a plurality of perfora' tions 42 for the adjustable attachment of the upper end of a rod 43, the lower end of which is connected with a foot lever 44. One end of this lever is pivotally attached to the lower portion of the truck frame and its other end passes downwardly through a suitable guide 45 and is provided with a pedal 46. The lever 44 is normally pulled upwardly by a spring 47 and such upward pull is transmitted, through the rod 43, to move the short arm of latch lever 37 upwardly and its longer arm downwardly to insure engagement of the lug 40 with the tooth 39. The lower lever 44 is provided with a lug 48 to act as a stop to be engaged by the lug 40 and limit the movement of the frames 5 when the same are rocked from the position shown in Fig. 1 to the position shown in Fig. 3, and adjacent to the lug 48.

the lever 44 is provided with a notch 49 toreceive the lug 40 and lock the rocking frames 5 in their reversed positions as shown in Fig. 3.

The molding devices 50-51, including cope, drag and flasks of suitable construction are disposed on and properly attached to the lower table 10 as shown in Fig. 5, when the mechanism is disposed in the po sitions shown in Fig. 1. The presser table (with the presser board attached thereto) will then be moved forwardly in the manner previously explained, to position directly over the table as shown in Fig. 2. During the movement of the presser table from the position shown in Fig. 1 to the position shown in Fig. 2, the pin 33 on one of the rods 16 will engage the arm 32 of the latch 29 and cause the latter to be raised (as shown in Fig. 2) to release the crank arms 15,--the turning of which latter will effect the lowering of the presser table. This lowering operation is accomplished by the manipulation of devices which will now be explained.

At one end of the machine, gears 5252 are secured to the shafts 14. A short shaft 53 is mounted in suitable bearing blocks 5455, the bearing block 54 depending from the table 10 and the bearing block 55 being attached to the journal of the adjacent rocking frame 5. The shaft 53 carries a pinion 57 which meshes with and transmits motion to the gears 52 and to the shafts 14, when said shaft 53 is turned by the manipulation of a hand wheel 58 thereon. The hub of the hand wheel 58 is provided with a toothed or ratchet wheel 59 provided on one face with a lug 60 and a dog 61 is pivotally attached to the block or arm and rests by gravity (when the parts are in the positions shown in Figs. 1 and 5) on the toothed periphery of the wheel 59. A disk 62 is mounted on the shaft 53 and is provided on its respective faces near its periphery with lugs 6364 which are directly opposite each other, the lug 63 being in position to beengaged by the lug on wheel 59 and the lug 64 on said disk being in position to engage a lug on the block or arm 55.

Assume now that the parts are in the positions shown in Fig. 2 with the presser table 17 ready to be lowered for pressing the molds located on the lower table 10. The operator will turn the hand wheel 58, thus imparting motion to the shaft 53 and, through the pinion 57 on this shaft, to the gears 52 on the shafts 14. The shafts 14 will thus be turned and motion will be transmitted through the cranks 15 and rods or links 16 to the four corners of the presser table and the later will, therefore, be lowered to cause the presser board to pressthe molds on the lower table 10. During this downward pressing movement of the table 17, the crank arms 15 should make, approximately one-half revolution, and to insure this, the stop devices above described, and shown in detail in Figs. 811, may be employed. Thus, the hand wheel 58 can be turned one revolution before the lug 60 on wheel 59 will engage the lug 63 on disk 62. During the next revolution of the hand wheel, the disk will be turned one revolution, when it will be stopped by engagement of the lug 64 on said disk with the lug 65 on the block or arm 55. The hand wheel cannot be further turned and hence the presser table will be locked, (by engagement of the dog 65 with the ratchet wheel 59) with presser board pressed on the molds on the lower table. The two tables can now be turned over so that they will assume the positions shown in Fig. 3, and this is accomplished by turning the rocking frames with the use of one or the other or both of the arms or levers 9. When the tables shall have been thus reversed, the dog 61 will have become disposed under the ratchet wheel 59 and will drop from the latter by gravity. Should the dog not drop promptly, a slight backward movement of the hand wheel will cause it to become released. The dog 61 having been thus released from the ratchet wheel, the shafts 14 will be free to turn, and the presser table will be free to drop by gravity, with the molds thereon. The presser table, (which is now in a lower plane than the table 10) can now be swung forwardly to the position shown in Fig. 4 to facilitate handling of the molds. This may be accomplished by means of the lever 37, and by the manipulation of this lever, the points of juncture of the arms 35 with the links 36 will be raised until said points of juncture have been passed, a line extending from the shaft 34 to the pivotal junctures of the links 36 with the rods or links 16 such upward movement of the cranks 35 and links 36 being limited by stops 66 on the table 17. In this way, lock joints are formed for holding the table 17 in the position shown in Fig, 4.

In order to permit the parts to move from the position shown in Fig. 4 and to assume their normal positions with the presser table in the first position indicated in Fig. 1, it is necessary to break the lock joints above described, by manipulation of the lever 37 and to release the rocking frames 5 from engagement with the foot lever 44. When the parts have been thus released the table 17 will, in most instances, swing backwardly with sufficient momentum to carry it to the position shown in Fig. 1, and the other rocking or reversible parts will also assume the positions shown in said figure.

Various slight changes might be made in the details of construction of my invention without departing from the spirit thereof or limiting its scope and hence I do not wish to restrict myself to the exact details herein set forth.

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

1. In a molding machine, the combination with a main frame, and rocking frames mounted therein, of a table rigid with said rocking frames, a presser table, pairs of arms or links pivotally connected with respective ends of said presser table, cranks mounted on the rigid table and pivotally connected with said pairs of arms or links, and means for controlling the operation of said cranks.

2. In a molding machine, the combination with a mold table, and a presser table and reversible means for support-ing said tables, of arms pivoted to the presser table, cranks carried by the mold table and pivotally connected with said arms, means for operating said cranks, a shaft carried by the presser table, arms secured to said shaft, links connecting said arms with two of the first-mentioned arms, and an operating lever secured to said shaft.

3. In a molding machine, the combination with a main frame, a mold table, a presser table, and reversible means for supporting said tables, of cranks located at the ends of the mold table, means for operating said cranks, arms pivoted to said cranks and to the ends of the presser table, a lug on one of said cranks, a latch to engage said lug, means for swinging the presser table, and a pin on one of the pivoted arms to release said latch from the lug on said crank when the presser table is swung forwardly.

4. In a molding machine, the combination with a main frame, a mold table, a presser table, and reversible means for supporting said tables, of cranks at the ends of the mold table, means for operating said cranks, arms or links pivotally connected with said cranks and with the ends of the presser table, a shaft mounted in the presser table, arms on said shaft, links pivotally connecting said arms with the first mentioned arms, a lever secured to said shaft, and stops on the table adjacent to the arms on said shaft, whereby said arms and links will constitute a lock to hold the presser table in a position below and forwardly of the mold table.

5. In a molding machine, the combina ti on with a main frame, of connected rocking frames mounted therein, a mold table rigid with the rocking frames, a presser table novable relatively to the mold table, means for turning said rocking frames to reverse the tables a lug on one of the rocking frames, an upper latch lever to engage said lug, a lower pedal latch lever to be engaged by said lug, a rod connecting said latch levers, and a spring normally tending to move the latch levers to and retain them in operative relation to the lug on the rocking frame.

6. In a molding machine, the combination with a main frame, connected rocking frames mounted therein, a mold table rigid with said rocking frame, and a swinging presser table movable relatively to said mold table, of vertical guides on the rocking frames, pairs of lugs on respective ends of the swinging presser table, to cooperate with said guides, one lug of each pair of lugs being longer than the other and constituting stops to cooperate with the upper ends of the guides and position said presser table between the rocking frames.

7. In a molding machine, the combination with a main frame, and rocking frames mounted therein, of a mold table rigid with said rocking frames, two shafts extending from end to end of said table, cranks at the ends of each of said shafts a presser table,

two arms pivoted to each end of said presser table and also pivotally connected with lthe cranks on said shafts, means for swinging the presser table, and means for turning said shafts to move the presser table itertically with relation to the mold table. 5

8. In amolding machine, the combination with a main frame, and rocking frames mounted therein, of a mold table rigid with said rocking frames, two shafts mounted in said mold table, cranks on both ends of each shaft, a presser table, arms or links pivotally connecting the presser table with said cranks, means for rotating said shafts to cause vertical movement of the presser table, and stop devices for limiting the movement of said shaft rotating means.

9. In a molding machine, the combination with a main frame, rocking frames mounted therein, a mold table rigid with said rocking frames, and a vertically movable presser table, of two shafts mounted in the mold table cranks on both ends of each of said shafts, means connecting said shafts with the presser table, gears on said shafts, a short shaft mounted in bearings movable with the rocking frames, a pinion on said short shaft meshing with said gears, a hand wheel on said short shaft, a ratchet wheel rotatabl' with said hand wheel, a dog movable wit-l the rocking frames and engaging said rocka ing frame, a disk on the short shaft provided on opposite faces with lugs, a lug on the ratchet wheel to be engaged by one of the lugs on the disk, and a lug on a part movable with the rocking frames in position to be engaged by the other lug on the disk.

In testimony whereof, I have signed this specification in the presence of two subscribing witnesses.

ABRAHAM M. ZIMMERMAN.

Witnesses P. B. Hess, GEO. G. Moss.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of ZPatents, Washington, D. C.

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