US332504A

US332504A - Mold for casting

Info

Publication number: US332504A
Authority: US
Publication date: 1885-12-15
Anticipated expiration: 1902-12-15

Description

(No Model.) 3 Sheets-Sheet 1.

J. B.. DAVIES.

MOLD POR CASTING'. I No. 332,504. V Patented Dee. 15, 1885.

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C jew/021' (No Model.) 3 Sheets-Sheet 2.

J. R. DAVIES.

MOLD POR CASTING, No. 332.504. Patented Dec. 15, 1885.

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-(No Model.) 3 Sheets-Sheet 3.

. J. R. DAVIES.

MOLD FOR CASTING. No. 332,504. Patented Deo. 15, 1885.

y l 'n Mlm aww@ 2M JOHN R. DAVIES, OF CHICAGO, ASSIGNOR OF ONE-HALF TO WM. lV. FLINN, OF HIGHLAND PARK, ILLINOIS.

IVIOLD FOR CASTING.

SPECIFICATION forming part of Letters Patent No. 3132,504, dated December 15, 1885.

Application filed August Q2, 1885. Serial No. 175,039.

(No model.)

To all whom it may concern,.-

Beit known that I, JOHN R. Davies, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois,

have invented certain new and useful Improvements in Molds for Casting, and I hereby declare the following to be a full, clear, and exact description of the same.

My present invention is in the nature of an ro improvement upon that for which Letters Patent of the Unit-ed States No. 131,214 were granted to me on the th day of September, 187 2.

The general object of my present invention is the same as that set forth in the aforesaid Letters Patent-viz., the production of castings in a more speedy and cheap manner than by the ordinary means.

The particular purposes of the improve- 2o ments hereinafter set forth are: better to adapt the construction set forth in the Letters Patent referred to, to the casting of objects of longer dimensions th an those for the casting of which provision is made by the aforesaid construction, to provide a suitable cooling-space, and to afford an adjustable and detachable ring for the core-bar of each sectional fiask or mold.

To these ends my invention consists in the general construction whereby the aforesaid 3o purposes are accomplished; and it also consists in certain details of construction and combinations of parts, all as hereinafter set forth.

Referring to the drawings, Figure l is a 55 bottom plan View of my device, showing the mechanism at the base of the molds for separating and closing the sections forming them; Fig. 2, a vertical section of a portion ofa mold, showing details of construction, Fig. 3, avertical section taken on the line 3 3 of Fig. 1,

viewed in the direction of the arrows and inverted; Fig. 4, a broken plan view of a portion of the mechanism applied to the sections of molds toward their upper extremities, for

the purpose of operating in conjunction with the mechanism toward the lower extremity of the same to actuate the sections; Fig. 5, a broken view in elevation of a detail 5 Fig. 6, a sectional view of a broken section showing 5o the construction of the joints, whereby said cleats or ribs are afforded for the lining; and

Fig. 7, a sectional View of aportion ofthe mechanism toward the upper extremities of the molds, for operating the sections.

A is the base-plate upon which the molds are carried, the mechanism for operating the latter being below the lower surface of the base-plate, so as to prevent molten metal from falling upon parts of such mechanism that would interfere with its operativeness.

rIhe location of the mechanism referred to is, as will be seen on reference to my Letters Patent referred to, different from the position of the same shown in the latter, which is on the upper surface of the base-plate A.

. B B are the molds, comprising each longitudinal section, preferably three in number,

as shown, which flttogether to form a mold by means of V-shaped joints t, the latter affording the preferred form of joint, though it may be plain, if desired. Each section of a mold is provided with a cooling-space, s, (clearly shown in Fig. 2 of the drawings) into which lead lateral openings s', to admit the nozzle of an air-tube, through which cold air or cold water is introduced into the Cooling-space for purposes of cooling. The cooling-spaces of a mold are independent ofeach other in the sections-that is, they do not communicate with each other-since thereby it is possible to con- 8o trol the contraction and expansion of each seetion independently and produce equalization thereof, which is necessary to cause them to fit each other properly and allow them to be actuated with exactness. The unequal expansion 8 5 or contraction ofthejoints which would tend to prevent their proper adjustment, and thus produce inequalities in the castings, is avoided by the provision of the cooling-spaces and the proper control of the same. Tubes s2 extend 9o through the sides of the molds into the space containing the lining s3, where they are per- -forated to afford communication with the outer air, to lead off gas and steam generated by drying the lining. The plate A is provided with an opening for each mold, constructed to afford a countersunk angular seat, r, for the ring C, which is provided with a ange to fit upon the seat, as shown in Fig. 2, and supports the core q. The core is formed, preferroo ably,in one of the usual ways, wherein a metal cylinder, p, is wound on its external surface with straw rope p', upon which loam p2 is plastered, and reduced to the shape to afford the desired configuration. v C' is the core-bar, bolted to the inner side ofthe cylinder p. The ring C is readily removable, to make room foi` others of varying sizes to support cores of different diameters. In the center of the baseplate, on the lower side of the same, is a disk, D, secured upon and to move with a vertical oscillatory shaft, E,whieh extends th rough the base-plate and through the center of the disk D, which is provided with a series of eccentrically-arranged slots, o. Each section of a mold is provided at its lower extremity with three flanges, n n', (shown in dotted lines in Fig. 1,) the lateral ones n' of which are V- shaped longitudinally on theirunder sides, and extend through slots formed in the bed-plate to iit into the V-shaped peripheries of rollers m, supported in suitable bearings, m', extending from the lower surface of the bed-plate, and each central flange, a, may, if desired, move underneath a roller, m2, suitably located, as shown in Fig. 3, on the upper surface of the bed-plate, to prevent canting ofa section while being moved when the mechanism hereinafter described, adj usted upon the molds toward their upper extremities, is not employed. Each central iiange, a, is provided with a pin, o', which projects into vthe slots o of the disk D, whereby on turning` the shaft E these sections, owing to their connection with the central disk, and the other sections, owing to their connection therewith, hereinafter described, will be opened and closed.

To the lower surface of the central disk, D, are pivoted toward their extremities four arms, k, one for each mold employed, (of which molds, however, more or fewer may be used, if desired.) Toward the opposite extremity of each arm k is pivoted a slide, z', working on a guide, 7c', on the base-plate, and supported Aformed upon the base-plate.

by a roller, lc?, carried in suitable bearings Rods h connect the slides Z pivotally with plates G, provided with eccentric slots o2, similar to the slots o in the central disk, D, and pivotally secured upon the base-plate. The base-plate is slotted, as shown at fr, Fig. l, to permit movement of the bolt x', which serves to connect each plate G with a central iiange, u, on asection of a mold,

B, except the-sections adjacent to the central disk, D, which are pivoted to the flanges n of such sections in the manner already described.

From the foregoing description it will readily be seen that by turning the central shaft, E, in one direction by means of a crank, i-f desired, applied to the upper end of the shaft, the sections forming the molds will be separated to permit removal ofthe castings longitudinally by means of derricks, cranes, or other similar devices, and that they will be closed to form the molds by turning the shaft E in the opposite direction. This operation is very readily performed with molds of a length sufficient for comparatively short castings; but to permit the casting of gas-pipes,

water pipes, .sewerpipes, lamp.- posts, and other similar objects of considerable length, for which purpose of course the molds must be correspondingly long, difficulty is encountered in moving the sections forming the molds by actuating them with the mechanism hereinbefore described applied only toward the lower end ofthe device, principally for the reason that they are liable to stick toward their upper extremities, and thus entail very undesirable consequences. To obviate this, I pro- -vide the mechanism of which the following is a description: A' is a plate, similar to the bed-plateA, adjustably supported toward its corners by means of adjustable collars Z upon vertical rods F, which pass through it, and provided with openings to admit through it the molds B and central shaft, E, having a collar, Z', and set-screw Z2, to afford a support for the plate A' at its center. The openings through the plate A' are of the form shown-in Fig. 4 of the drawingsto afford recesses for the reception of the sections of the molds when separated, and to permitsuch separation. A disk, D', surrounds the central shaft below the plate A', being supported bythe collar Z', which may be formed integral with the same, as shown, and is provided with eccentricallyarranged slots, like those on the disk D on the base-plate A. Through these slots project,

in a downward direction, pins e from flanges n2, and guide-pins e' extend from the upper surfaces of the flanges a through slots in the plate A, all operating in a manner analogous to that described for the mechanism toward the base of the device, and for the same purpose, and the mechanism in the forni of the arms 7s, supported slides Z, rods h, and slotted pivoted plates G, at the lower end of the device, is provided to connect in the same manner the disk D' with the flanges n2, extending from the sections toward their upper extremities. Turning of the cent-ral shaft, therefore, operates to actuate the sections of the molds simultaneously at their upper and lower extremities.

To permit the whole device to be readily moved from one position to another, carriagerollers H are provided toward the corners of the base-plate A on its lower surface.

For the purpose of a continuous operation, the molds are to be lined with suitable compositions composed of fire-clay and plumbago, or any similar material that will answer the purpose. The lining is applied as follows: The mold being open, the pattern is inserted and the lining applied in a plastic condition.

-The mold is then closed, thereby pressing up- IIO The vent-tubes s? assist in holding the lining securely in place.

It is to be understood that each section of mold is a shell containing a cooling-space, s, which is separated by the inner wall, t, of the shell from the lining. The lining is applied to the inner surface of this shell, and is made to conform to the surface of the pattern (which is sustainel in a hanging position within the mold around the core by a derrick or crane, or the like) by closing the moldsections, and thus compressing the lining against the pattern. Vhen-the mold has been thus formed, the lining is suitablyl hardened by heating or drying it in a furnace or otherwise.

The body of each mold I usually make of cast-iron5 but when it is desired to cast steel in them they are to be made of copper, for the reason that copper molds will retain heat longer than those made of iron. Vhen dried, the lining is coated with some substance that will impart to it a smooth surface. For this purposeacomposition of fish-oil, resin, and lampblack, heated and mixed, may be used, being applied with a brush; or fish-oil, plumbago, and pulver-ized charcoal may loe used for the purpose; or it may be coated with soot by burning pitch under the molds to cause the smoke to enter them.

Vhat I claim asnew, and desire to secure by Letters Patent, is-

l. The combination, with a mold for repeated and continuous use in casting metals, and composed of three or more sections, of mechanism, substantially as described, provided upon the mold toward its opposite extremities, to open and close the sections, as set forth.

2. The metallic base-plate A, having one or more molds, B, formed each in three or more sections, in combination with mechanism, substantially as described, upon each mold toward its opposite extremities, to open and close the sections, as set forth.

3. rl`he combination, with a cluster or series of sectional molds upon a base-plate, of operating mechanism, substantially as described, upon the opposite extremities of the molds, for'simult'aneously opening and closing the molds composing the cluster or series, as set forth.

4. The combination, with a cluster of sectional molds, B, on a base-plate, A, provided with a central shaft, E, and mechanism, substantially as described, upon the baseaplate A and shaft, for opening and closing the sec tions of the molds, ot' mechanism, substantially as described, upon the shaft E and molds toward their upper extremities, constructed to operate simultaneously with the mechanism of the base-plate A and shaft, to open and close the molds, as set forth.

5. A mold for casting metals, composed of three or more sections provided with noncommunicating cooling-spaces s, having openings s', in combination with mechanism, subA stantially as described, for opening and closing the sections, as set forth.

6. A mold for casting metals, composed of three or more sections provided with noncommunicating cooling-spaces s, having openings s', and a lining, s3, vented by means of tubes s, communicating through the section with the external air, and mechanism, substantially as described, for opening and clos ing the sections, as set forth.

7. A mold for casting metals, composed of three or more sections provided with noncommunicating cooling-spaces s, having `openings s,and lining s3, confined by sand-cleats q, and vented by means of tubes s2, communicating through the sections with the external air, and mechanism, substantially as described,for opening and closing the section.

8. A metallic base-plate, A, having one or more molds, B, formed in sections having flanges a and anges a, V shaped longitudinally on their lower surfaces, rollers m on the lower surface of the base-plate, having \lshaped peripheries, forming guides for the flanges a', an oscillatory shaft, E, supported upon the base-plate A and carrying disks D and D toward its opposite extremities, and mechanism, substantially as described, connecting the disks D and D with each section of a mold, whereby all the sections may be opened and closed simultaneously, as set forth.

9. A cluster or series of sectional molds, B, supported upon a base-plate, A, and having independent cooling-spaces s, communicating with the external air, and linings s3, vented by means of tubes s2, communicating with the external air, acentral shaft, E, upon the baseplate carrying, to move with it, a disk D, on the lower surface of the base-plate, and a disk, D', toward its upper extremity,tlanges a and n upon opposite extremities ofthe sections of the molds, a plate, A', surrounding the molds toward their upper extremities, and supported above the base-plate A and on the central shaft, and mechanism, substantially as described, connecting the disks D and D with their adjacent flanges a, the whole being constructed and arranged to operate substantially as set forth.

JOHN R. DAVI ES.

In presence of- WILLIAM W. FLINN, Mason Bnoss.

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