US428590A - Thomas edward caddy - Google Patents

Description

(No Model.)

T E GADDY MOLDING MACHINE. No. 428,590.

Patented May 27, 1890.

we News PErEns co., PNoTowmm., wmnmerpu, u. c.

UNrrnn .STATES PATENT OFFICE..`

THOMAS EDWARD OADDY, OF NEV BASFORD, NOTTINGHAM, ENGLAND.

IVIOLDING-MACHINE.

SPECIFICATION forming part of Il'.|etters` Patent No. 428,590,1dated May 27, 1890. Application tiled December 17, 1889. Serial No. 334,046. (No model.) Patented in England April l2, 1888, No. 5,447.

T all whom it may concern:

Be it known that I, THOMAS EDWARD OADDY, a subject of the Queen of England,

' castingzmetallic articles provided with cores.

The principal object of my invention is to provide a molding-machine of comparatively simple construction, and the arrangement of the parts thereof is such as that the operation can be carried out in a more expeditious and efcient manner than has been heretofore possible in such class of machines.

The nature and characteristic features ofv my invention will be more fully understood from the following description, taken in connection with the accompanying drawings, forming part hereof, and in which Figure l is a front elevation of a machine embodying the features of my invention, and showing the molding-box thereof in section. Fig. 2 is an end elevation thereof. Fig. 3 is a top or plan view of Fig. l, and Fig. 4 is a vertical transverse section on the line a: of Fig. 1.

ltteferring now to the drawings, A is the bed-plate of the machine. c and o. are end standards .mounted on and rigidly secured to said bed-plate. The strips b and b are bolted or otherwise secured to the upper extremities of these standards.

C is a platform provided with depending lugs c.

c are set-screws inserted through the lugs c for adjusting and securing said table to position. c2 and c3 are lugs provided with pins c4 and c5, and respectively cast integral with or otherwise secured to the lateral edges of the platform O. The platform O is provided with an opening corresponding accurately with the shape or coniiguration of the pattern in plan of which it is desirable to form a mold.

D is a movable table or bar adapted to be raised and lowered and guided in its upward and downward movements by the slides d and CZ.

d2 is a bracket centrally secured to the under side of the movable table or bar D and having friction-rollers (Z3 journaled therein. These rollers d3 engage with a cam-shaped arm d4 for raising` or lowering the movable table or bar D. The cam-shaped arm d4 is rigidly secured to the transverse shaft d5. This shaft d5 is journaled to the bracket d, mounted on and secured to the bed-plate A. The shaft d5 has attached thereto a longitudinal hand-lever (Z7 for actuating the camshaped arm dt, and thereby elevating or lowering the movable table or bar D.

An arm or a pawl e is rigidly mounted on a shaft c2, journaled in a bracket e3, mounted on and secured to the bed-plate A. A handlever or treadle e', for actuating the arm or pawl e, is also mounted on the shaft e2 and forms an acute angle with the pawl e, for retaining by its own weight the latter to position against the extremity of the cam-shaped arm d4. f, f ,and f3 are blocks interposed between the pattern E and the table D.' The pattern F in use in secured to the tableD by means of the screw-bolts f2 and f4, passing through the blocks f and f3.

VGr is a molding box or flask provided with apertures g, which engage with the pins c4 and c5, extending above the surface of the platform C. This box or flask Gmay be made longer than the pattern E, or it may be provided with adjustable metal end pieces g.

When the casting is to be cored out, the end pieces g are `provided with apertures g2 of the exact shape or configuration of the periphery of the core to be formed in the finished article.

When the molded or cast article is to be cored out, core-prints may be formed in the mold and the cores inserted in the usual manner; but in some cases-for instance, when casting hollow fire-bars or tire-bars having tubes therein, as shown in the drawings-the following device can be advantageously employed:

To the end standard a is rigidly secured a frame H, consisting of the horizontal pieces h and h and brace h2. This frame supports two vertical guide-brackets h3 and h4, adapted for the reception of the bar h5. This bar h5 is provided with a flattened extremity 7L", and is guided and afforded a range of longitudinal movement, for a purpose to be presently more fully explained.

The operation of my improved molding-machine is as follows: The pattern F is secured to place upon the movable table D and the platform C adjusted so as to allow said pattern to be raised through and above the matrix or opening formed in the platform C. The platform is then rigidlyseeured to place upon the horizontal pieeesl1,a11d the movable table D is raised by means of the hand-lever (lf and secured in an elevated position by means of the pawl e, so that the pattern F projects through and above the matrix or opening formed in the platform C. The molding box or flask G is then mounted on the platform and held in position by the pins or studs c4 and c5. Suitable molding materialas sand-is then placed in said box and rammed tightly around the pattern. By releasing the cam-shaped arm d* from its engagement with the arm or pawl e and then raising the handdever (Z7 the pattern is caused to assume a depressed position below the platform C. The guide-bar lr" is then passed longitudinally through the openings or matrices g2, formed in the end pieces g', and one end of the core or tube fastened to the tlat tened end 7L thereof. The bar h5 is then either drawn backward by hand or pushed backward by the core or tube. lVhen the core or tube is in proper position, it is disengaged from the flattened end hof thebar The mold having the core or tube in proper position therein may be removed to a bed of sand or other preferred material, or, if a chilled surface is required, to a metal plate, and is ready for the reception of the molten metal as soon as the necessary runners have been formed therein. To form amold in two boxes separate patterns must be formed for the top and bottom boxes where the molds in both are not identical, the holes in the boxes fitting over the studs or pins e" and e5 of the platform C during their formation, and thus secure the accurate adjustment of the boxes when placed together. By employing a plate or platform through which the patterns project, the sand may be evenly rammed around the pat-tern instead of forcing the pattern into the sand, thereby producing a better mold. By withdrawing the patterns through the openings in the plate in the manner described the edges of the mold arc held intactby the plate, and the :mold is removed from the machine ready for receiving the metal without requiring such attention as has hitherto been found necessary.

Having thus described the nature and objects of my invention, what I claim as new, and desire to secure by Letters Patent, is-

l. In combination, a melding-machine provided with a removable longitudinal plate having an opening therein, a bar or platformA located beneath said plate,apattern mounted on the upper surface thereof and adapted to be introduced through and to engage with the walls of the opening in said longitudinal plate, a box supported upon said longitudinal plate and having perforated end plates, a guide-bar sliding longitudinally in stationary bearings and adapted to be inserted through said box, substantially as and for the purposes set forth.

2. In combination, a molding-machineprovided with a removable longitudinal plate having an opening therein, a bar or platform located beneath said plate, a pattern mounted on the upper surface thereof and adapted to be introduced and withdrawn through and to engage with the walls of the opening in said longitudinal plate, a box supported on said longitudinal plate and having perforated end plates, removable and adjustable end plates, and a guide-bar sliding longitudinally in stationary bearings and adapted to be inserted through said box, substantially as and for the purposes set forth.

The combination, in a molding-box, of metal end pieces having apertures therein adapted for the reception of a core and a bar sliding longitudinally in stationary bearings and adapted to be inserted through the apertures in said box and end pieces, substantially as and for the purposes set forth.

l. The combination, in a molding-machine, of a movable platform sliding in guides, a camsl1aped arm mounted on a shaft pivoted to the base-plate, a lever-arm mounted on said shaft, a pawl formed integral with an arm pivotally supported above said basc plate and adapted to engage with said eamshaped arm, and friction-rollers pivotally connected with said platform and normally contacting with said cam-shaped arm, substantially as and for the purposes described.

In testimony whereof l have hereto set my hand in the presence of the two subscribing witnesses.

THOMAS EDXVARD CADDY.

lVitnesses:

F. C. SHELDON, WILLis WAIN.

IIO

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