US69854A - Improved machine foe moulding pipe - Google Patents

Description

@uiten gisten identit @fitta WILLIAM'SMITH, or PITTSBURG, PENNSYLVANIA. Letters Patent No. 69,854, dated October 15, 1867.

IMPRVED MACHINE I'OR MOULDING PIPE.

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TO ALL WHOM IT MAY CONCRN:

Be it known that I, WILLIAM SMITH, of the city of Pittsburg, in the county of Allegheny, and State of Pennsylvania, have invented a new and useful Improvement in Pipe-Moulding Machine; and I do hereby declare the following to be afull, clear, and exact description thereof, reference being had to the accompanying drawings, making a part of this specification, i'n which- Figure 1 is a side elevation of my improved machine for making pipe-moulds,

Figure 2 yis avertie'al section thereof,'and

Figures 3 and 4 show separate views of the devices by which the moulding flask is held in position.

Like'letters ofvreference in th ditl'erent ligures indicate corresponding parts. l

Moulds for casting metal pipe have heretofore been made chiefly by hand, by packing the sand in a ilask and around a core, against which is formed the inner `face--ot'the mould. Such process is slow, tedious, and expensive, particularly vin making moulds in lengths suitable for water pipe and othru similar uses. The expensiveness of this mode of `manufacture is still further increased by the diilculty of packing the sand uniformly on all sides and in all parts involving the employment of considerable skilled labor for that purpose.

The nature of my invention consists in the construction of devices by which to make such moulds, so as to 'obviatealmost wholly th'nceessity ot employing labor of any kind, and more particularly in making such moulds by a mechanical force acting outward from the axis of the proposed mould. The work of packing the sand and shaping-the mould is by my invention done wholly by machinery.

To enable others' skilled in the art to make and use my invention, I will proceed to describe the construction of the machine and its mode of operation. A

A framework, A, of any desirable construction, contains-and supports the devices employed, the lower end of the frame A to the height of the upper end of the flask B, usually being, for convenience sake, placed in a pit excavated Yin the ground. Running vertically from the upper to the lower cnd of thc frame A,'of such length as may be necessary, is a guiding-shaft, b, grooved at its lower end, and for thc greater part or the whole of its length, as at a, fig. its upper Aend passing loosely through a guide, b', and adjusted at any desirable point by a nut, 2,'and its lowcr end passing loosely through the axis of a bevel gear-wheel, c, and so keyed thereto by a feather playing in the .groove a as to revolve therewith, and at the same time play up and down, when desired, through the guide b', as hereinafter to be described. The bevel gear-wheel c is operated by the gear-wheel c', which receives motion from a crank, d, or by band or gear-wheel, or other similar known device, at pleasure. At the upper end of the frame A, an'd operating in the usual way, is a pair of revolving drums,f, which are operated'by a crank, d', or by band or gear-wheels, or arc so geared to the corresponding devices d at the lower end of the frame A, that by power communicated to either they both receive the proper motions. On the shaft b, 'and keyed thereto byA a feather working in the groove a, is a hollow shaft, g, operating as a sleeve, of length equal, or about equal, to'the length of the mould to be made. Its lower end carries a packer, g, of an exterior diameter equal to the linterior diameter of the desired mould. The upper cndof the packer g is bevalled o to the shapeof the frustum of n. cone, and its conical face has a series of spiral grooves, z', running from the top downwards in a direction opposite to that of the revolving motion to be given to it. At the upper endot the hollow shaft g is a collar, o, by which, while resting on the cross-bar t through which the hollow shaft y passes, the latter is raised and lowered by means of pulley-ropes k passing over and ceiling around Vthe drums f.' An adjustable collar, o', is attached to the guiding-shaft b, by which the shaft b is also raised and lowered bin the same manner as is abovedescribed. B is amoulding-ilask, made of any material usually employed for such purposes, and of Aany convenient shape, andin sach away as to be takenapart or opened for the purJ pose of removing the mould when made. Asishown in the drawings, it is of cylindrical shape, is divided longitudinally, and its two halves fastened together by hinges s and eyes and bolt 8". It stands vertically on the floor A, or on a plate, Z, attached thereto, by which, or in other convenient way, its lower end is partially or wholly closed so as to keep the vsand when thrown into the ilask from falling through. The upper end of the flask B I'usually make of a hopper shape for convenience in filling. I hold the flask I3l steadily and firmly lin position, and so that the guiding-shaft b shall pass along its axis by carefully centering its ylower end inside an annular flange, r, on the plate l, by which or in other convenient way it is prevented from moving laterally, and

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enclosing its upper end between sliding clamps m m, a plan view of which is given in fig. 3. The inner ends of these clamps m are cut out so as to enclose tightly the flask B when pushed forward, as in figs. 2 and 3, and to release it when slid back, as in fig. 1. These clamps m operate in slides of suitable construction, and if necessary, in order to secure their direct action, are slotted as at y, and guided by projecting pins y. At suitable points on either edge of both I attach lugs m m which playin inclined grooves n n in the vertical slide n, an inner face view of which is given in fig. 4. Then by lowering the slide n, (the button :r answering as a handle for that purpose,) the clamps m are made to enclose tightly the flask B, and by raising the slide n, the reverse. In this way I provide a convenient and effective device for holding the upper end of the flask B in its place while the mould is being made, and for releasing it when it is ready to bc removed.

With the devices described, my mode of operation is as follows: 'lhc lower end of the guiding-shaft b being keyed in its seat in the gear-wheel e, and the hollow shaft g, with its paker g, being lowered to the bottom of the flask B, which latter is carefully centred in the manner above set forth, I commence filling the sand for the mould into the flask B. As soon as a suflicicut quantity is fed in to pack readily, I apply power to the crank d, which is communicated along to the shafts I1 and g and packer g. The revolution of the packer g in the sand forms the inner face of the mould, and gives it a smooth surface. Motion is also applied to the crank d, whereby the hollow shaft g and its packer g' are slowly raised while revolving with the shaft b. The conical grooved head of the packer .7 then acts as a wedge in forcing the sand, which is vertically above it, outward toward the walls of the flask B. In this way, that is, by a force pressing outward from the axis of the mou-ld, Iform a. pipe-mould of any desirable length, of a smooth inner face, and of the required compactness. As soon as the packer g has cleared the upper end of the flask B, the cross-bar t engages the collar o', and carries the guiding-shaft b upwards till it also is clear of the flask. Then, the sliding clamps m being thrown back, the mould with its flask is removed to be baked or otherwise prepared for use, or used in the usual way.

I include in my invention the packer g when its head or upper end has other shapes than that described. It may be of the shape of the frustum of a cone, as set forth, or of the frustum of a pyramid of any desirable number of sides, or it may be spherical, or of other convex, or even of a concave shape. The grooves z' may extend down the inclined surface, either spin-ally, as described, or vertically, or, when the head is of' pyramidal shape, may be slightly inclined on one or more of its faces. Projecting blades or flukes may take the place of the grooves z', and extend vertically, spirally, or obliqucly down the face or faces of the head.

What I claim as my invention, and desire to secure by Letters Patent, is-

1. A revolving packer, g, tapering at or toward its upper end, and provided on the face or faces of such taper with grooves t', or projecting flukes in lieu thereof, constructed and operated substantially as and for the purposes hereinbefore set forth.

2. The revolving hollow shaft g carrying a packer, gf, in combination with the guiding-shaft b and flask B, arranged and operating substantially as and for the purposes above set forth.

3. The druinsf, ropes t, and cross-bar t, in combination with the collar o', for thc purpose of' elevating the hollow shaft g while the mould is being formed, substantially as above set forth.

4:. The gear-wheel c bored in the line of its axis for a seat for the guiding-shaft I), and keyed thereto, in combination with drumsf, and the apparatus hand t to engage the collar, for the purpose of imparting to the shaft b-revolving and vertical motions, substantially as set forth.

5. The vertically moving slide n, with its converging grooves n', in combination with the laterally moving clamps m having lugs 'm arranged and operated substantially as described.

In testimony whereof I, the said WILLIAM SMITH, have hereunto set my hand.

WILLIAM SMITH.

Witnesses:

A. S. NlcnoLsoN, G. H. CHRISTY.

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