US796603A - Molding-machine. - Google Patents

Description

No. 796,603. PATENTED AUG. 8, 1905. J B. RAMP.

MOLDING MACHINE.

APPLICATION FILED MAY 18. 1904.

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J. B. RAMP.

MOLDING MACHINE.

APPLICATION FILED MAY 18. 1904.

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J. B. RAMP.

MOLDING MACHINE.

APPLICATION rum) MAY 1a. 1904.

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attomwn No. 796,603. PATENTED AUG. 8, 1905. J. B. RAMP.

MOLDING MACHINE.

APPLICATION FILED MAY 18. 1904.

4 SHEETS-SHEET 4 JOSEPH B. RAMP, OF WEST BURLINGTON. IOWA.

MOLDING-MACHINE.

Specification of Letters Patent.

Patented Aug. 8, 1905.

Application filed May 18, 1904. Serial No. 208,627.

To all whom, it may concern:

Be it known that I, JOSEPH B. RAMP, a citizen of the United States, residing at West Burlington, in the county of Des Moines and State of Iowa, have invented a new and useful Molding-Machine, of which the following is a specification.

The invention relates to improvements in molding-machines.

The object of the present invention is to improve the construction of molding-machines and to increase the strength, durability, and efficiency of the same and to provide a simple and comparatively inexpensive one adapted to permit a carriage to be run under it from each of its four sides and capable of being operated at each side for controlling the pressing mechanism.

A further object of the invention is to provide a molding-machine adapted to support the top of the carriage independently of the body portion of the same, whereby when pressure is applied the body portion will be relieved of the strain incident to such pressure.

With these and other objects in view the invention consists in the construction and novel combination and arrangement of parts, hereinafter fully described, illustrated in the accompanying drawings, and pointed out in the claims hereto appended, it being understood that various changes in the form, proportion, size, and minor details of construction within the scope of the claims may be resorted to without departing from the spirit or sacrificing any of the advantages of the invention.

In the drawings, Figure 1 is a perspective view of a molding-machine constructed in accordance with this invention. Fig. 2 is a vertical sectional view of the same. Fig. 8 is a horizontal sectional View illustrating the construction of the bed-plate. Fig. 4 is an enlarged sectional view of the rotary valve. Fig. 5 is a plan view of the same. Fig. 6 is a detail perspective view of the top of the rotary valve, illustrating the arrangement of the pipes. Fig. 7 is a detail view of the rotary-valve disk. Fig. 8 is a detail view of the guide for the cylindrical piston. Fig. 9 is an end elevation of the carriage, showing the same arranged over the enlargement or support of the base. Fig. 10 is a transverse sectional view on the line 10 10 of Fig. 11. Fig. 11 is a side elevation, partly in section,

members.

illustrating the construction of the carriage. Fig. 12 is an enlarged detail plan view of one corner of the carriage. Fig. 13 is an enlarged detail sectional view illustrating the construction of the coupling for connecting the upper and lower piston-rods. enlarged detail sectional views illustrating the manner of mounting the packing-rings of the pistons.

Like numerals of reference designate corresponding parts in all thefigures of the drawings.

1 designates a bed-plate provided at its corners with arms or extensions 2, upon which are mounted vertical standards 3, and the latter support a cross-head or top plate 4, which is also provided at its corners with horizontal arms or extensions 5. The bed-plate and the cross-head or top plate are secured to the standards to form the frame of the machine by means of rods 6, having threaded ends for the reception of the upper and lower nuts 7 and 8, which engage, respectively, the top plate or cross-head and the bed-plate, as clearly shown in Fig. 2. By means of the horizontally-extending arms 2 and 5 the standards are spaced apart sufliciently to permit a carriage 9 to enter the molding-machine at each of its four sides, and the base-plate is provided with rails 10 and 11, arranged in pairs at right angles to each other, as clearly illustratedin Fig. 3 of the drawings. The base is also provided with rails 12, extending outward from each side of the molding-machine and spaced from the ends of the rails 10 and 11 a sufficient distance to permit thepassage of the flanges of the carriage-wheels 13. The contiguous rails 12, which are arranged at right angles to each other, are preferably formed integral, as shown in Fig. 3.

The carriage is provided with a body portion composed of two oblong side members or trucks 14:, connected at one end by a metal brace 15, consisting of a thin metal bar having its side faces arranged horizontally and provided at its ends with attachment plates or portions 16, arranged vertically and secured to the adjacent ends of the hollow side At this end of the carriage is also arranged a transverse handle 17, which is supported by side bars 18, secured to the outer sides of the hollow members 14 and projecting outward beyond the transverse brace or connecting bar 15. The wheels 13 are ar- Figs. 14 and 15 are ranged within the hollow side members and are preferably provided with roller-bearings, as shown. The carriage is provided with a depressible top plate 19, recessed at its sides at to receive the upper portions of the hollow side members and guided on the same. The top plate 19 is supported at each portion of the carriage by a coiled spring 21, disposed on a rod or pin 22 and supported by a bracket 23. The rod or pin, which is guided in an opening 24 of the bracket, is provided with a threaded upper portion 25, which pierces the top plate. The top plate is provided in its upper face at each corner with a recess for the reception of an adjusting-nut 26, which engages the threaded end of the rod or pin for controlling the tension of the spring. One end of the carriage is open to permit it to be run under the press with its top plate over an enlargement or support 27 of the bed-plate. The bed-plate is provided at its center with the enlargement or support 27, which extends upward, as clearly illustrated in Fig. 2 of the drawings, and which is adapted to receive the top plate of the carriage, as clearly illustrated in Fig. 10 of the drawings. When the pressure is applied, as hereinafter explained, the depressible top 19 of the carriage is forced downward upon the support or enlargement which sustains the said top plate 19, and thereby relieves the body portion of the carriage of strain.

In order to prevent a carriagenot provided with a depressible top from beinginjured or strained by the pressure, the rails 10 and 11 are provided with openings 28, which are spanned by thin resilient plates or springs 29,

arranged to receive the wheels of such a carriage and adapted to permit the carriage to be depressed sufiiciently to carry its top into engagement with the enlargement or support of the bed-plate. As soon as the carriage is relieved of the pressure of the molding-machine itwill automatically resume its normal position and clear the enlargement or support of the bed-plate. The carriage may then be run back from the molding-machine.

A hollow cylindrical head 30 is secured to and depends from the cross-head or top plate and is provided with a peripheral groove 31 for the reception of a packing-ring 32, which bears against the inner face of a cylindrical piston 33. The cylindrical piston normally inclosesthe head 30 and is provided at its lower end with a plunger 34. A pipe 35 extends through the head 30 to conduct compressed air or other pressure to the cylindrical piston 33, and a portion of this pressure finds its way through ducts 36 to the packing-ring 32, thus insuring the proper engagement of the packing-ring with the inner face of the cylindrical piston.

The cylindrical piston is provided with a centrally-arranged rod 37, which passes upwardly through a lower stufiing-box 38 at the center of the head 30 and which is connected at its upper end with the lower end of a rod 39 of a piston 40 of a cylinder 41. The cylinder 41, which is of less diameter than the cylindrical piston, is mounted on an upwardlytapered bracket 42, provided with openings facing the sides of the molding-machine. The rod 39, which depends from the piston 40, passes through a stufling-box 43 of the lower end of the cylinder 41 and is provided with a coupling 44. which receives the upper end of the rod 37. The coupling is provided at its top'with a socket 45 for the lower end of the rod 39, and it is bifurcated at its lower portion for the reception of the upper end of the rod 37, which is secured to the coupling by a pin 46, piercing the sides of the coupling and the upper end of the rod 37, as clearly illustrated in Fig. 13 of the drawings. The pin is readily removable to enable the parts to be uncoupled, whereby the cylindrical piston and the upper cylinder and its piston may be readily adjusted. The piston 40 of the upper cylinder 41 is provided with a packing-ring 47, arranged in a peripheral groove 48. The piston 40 is also provided with ducts 49, which communicate with the peripheral groove to admit a portion of the pressure to the pack ing-ring for insuring the proper engagement of the same with the cylinder 41.

The cylindrical head 30 is provided with a depending guide 50, having a vertical slot 51 for the reception of a projection 52 of the cylindrical piston, whereby the latter is prevented from rotating on the head 30. One or more of these guides may be employed, as will be readily understood.

The cylindrical piston constitutes the press- I ing mechanism for ramming the sand around the pattern, and compressed air or other pressure is admitted to the molding-machine for controlling the movements of the lower cylindrical piston and the piston of the upper cylinder by means of a rotary-valve disk 53,

arranged within a cylindrical casing 54, which is pierced at one side by an air-supply pipe 55. The rotary-valve disk or member operates against the upper end of the cylindrical casing 54, which is arranged vertically, and it is held in properv contact with the inner face of the top or head 56 of the cylindrical casing by means of a heavy coiled spring 57, disposed on a valve-stem 58 and interposed between the rotary-valve disk and the lower end 59 of the cylindrical casing.

end 60 of the valve-stem, which is threaded, is screwed into a socket of the valve-disk, which is provided with a feed-port 61 and an exhaust port or passage 62. The feed-port 61 consists of an opening extending entirely through the rotary disk and adapted to be brought The upper I into register with ports 63 and 64 of the top of the cylindrical casing, the said ports 63 and 64 communicating, respectively, with a pipe 65, leading tothe upper cylinder, and with the pipe 35, leading to the cylindrical piston. The exhaust passage or port 62 consists of a curved groove communicating with an exhaust-port 66 and adapted to be brought into register or communication with ports 67 and 68, communicating, respectively, with the pipes 65 and 35, leading to the upper cylinder and the lower cylindrical piston. The pipe 65, which leads to the upper cylinder, has two branches 69 and 70, which communicate, respectively, with the ports 63 and 67, being fitted within th esame. The other pipe 35 is provided with two branches 71 and 72, which communicate with the ports 64 and 68, respectively. When the port 61 of the valvedisk is in communication with the port 63, compressed air will be admitted to the small upper cylinder for raising the cylindrical piston. In this position the feed-port 64, which communicates with the cylindrical piston, is closed, as is also the exhaust-port 67 which communicates with the small cylinder. The exhaust-port 68, which communicates with the cylindrical piston, is then in communication with the exhaust port or passage 62. and the compressed air within the cylindrical piston is caused to exhaust through the pipe 7 3. When the valve is shifted, the port 63 will be closed-and the port 64 opened to admit com pressed air to the cylindrical piston. This movement of the valve-disk closes the exhaust-port 68, communicating with the cylindrical piston, and places the exhaust-port 67 in communication with the exhaust passage or port 62, thereby permitting the air within the small upper cylinder to exhaust. By this construction the press of the molding-machine is operated.

The cylindrical casing 54 is provided with supporting-legs 74, which are secured to the cross-head. or top plate of the molding-machine. The valve stem extends below the lower end or head of the cylindrical casing 54, which is provided at the bottom with a suitable stuffing-box 75. The lower end of the valve-stem is connected with operating-rods 76, extending to the four sides of the machine and provided thereat with depending handles 7 7 The operating-rods are adapted to be shifted or oscillated to partially rotate the valve-disk, and their movement is limited by guides 78, mounted upon the cross-head or top plate of the machine, as clearly illustrated in Fig. 1 of the drawings.

In operation the flask is placed upon the carriage, which is run under the press, and the latter is operated to press the sand thoroughly upon every part of the pattern with a uniform pressure. The valve is then shifted to admit air to the small upper cylinder for raising the cylindrical piston. The supply of compressed air to the rotary valve may be controlled by a suitable valve or cut-off, as will be readily understood.

The downward movement of the cylindrical piston is limited by a safety-port 79, consisting of an opening located at one side of the cylindrical piston, near the upper edge thereof, and adapted when uncovered by the downward movement of the said piston to permit the escape of the compressed air, whereby further downward movement of the piston will be arrested.

Having thus fully 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 bed-plate provided with four arms or extensions and a central rigid enlargement or support, rails arranged in pairs at right angles to and crossing each other and resting on the bed-plate at the sides of the enlargement or support, four standards mounted on the arms or extensions of the bed-plate outside the rails, a top plate having four arms or extensions connected to the upper ends of the standards, pressing mechanism carried by the top plate and arranged above the said enlargement or support, a carriage adapted to run on the rails under the pressing mechanism in four different directions and comprising two spaced side members or trucks to run on the rails, and a top adapted to rest on the support or enlargement, and means for yieldably holding the top of the carriage above the said support or enlargement, whereby when the pressure is applied, the top ofthe carriage will rest upon the support or enlargement, said means being also adapted to automatically lift the top of the carriage from the support when the pressure is removed, substantially as described.

2. In a molding-machine, the combination of a press, a bed-plate having a support adapted to receive the top of a carriage, rails located at opposite sides of the bed-plate and provided with openings, and springs spanning the openings of the rails and completing the same and adapted to receive the wheels of a carriage to permit the top thereof to be depressed upon the support when the pressure is applied, substantially as described.

3. In a molding-machine, the combination of abed-plate havingasupport, a press located above the same, a carriage composed of a body portion, a top adapted to rest upon the support, and springs mounted on the body portion and supporting the top, substantially as described.

4. In a molding-machine, the combination of abed-plate having a support, a press located above the same, a carriage comprising a body portion provided With brackets a top adapted to rest upon the support, springs mounted on the brackets and supporting the top of the carriage, and pins adjustably connected With the carriage and receiving the springs and guided on the brackets, substantially as described.

-In testimony that I claim the foregoing as my own I have hereto aflixed my signature in the presence of two Witnesses.

JOSEPH B. RAMP. Witnesses:

JOHN N. PATTERSON, OLIVER B. RAMP.

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