US746779A - Apparatus for forming pipe-cores. - Google Patents

Description

N0. 746.779. PATENTED DEC. 15, 1903. H. L. BELL & G. 0. SWEITZER. APPARATUS FOR FORMING PIPE CORES.

APPLICATION FILED JUNE 30, 1903.

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No. 746,779. PATENTED DEC. 15, 1.903. H. L. BELL & G. O. SWEITZER. APPARATUS FOR FORMINGv PIPE GORP-S.

APPLICATION FILED JUNE 30, 1903.

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H. L. BELL & c. 0. SWEITZER. APPARATUS FOR FORMING PIPE 0035s.

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UNITED STATES Patented December 15, 1903.

PATENT OFFICE.

APPARATUS FOR FORlVl'lNGPlPE-CORES.

SPECIFICATION forming part of Letters Patent No. 746,779, dated December 15, 1903. Application filed June 30 1903. Serial No. 168,715. (No model.)

To alt wh0m it may concern: p

Be it knowu that we, HARRY L. BELLand CHARLES C. SWEITZER, both of Mishawaka, St. Joseph county, Indiana,haveinvented certain new and useful Improvements in Apparatus for Forming Pipe-Cores; and we hereby declare that the following is a full, clear, and exact description thereof, reference being bad to the accompanying drawings, which form part of thisspecification.

This invention is an improved machine for making cores for use in casting hollow metallic bodies, such as pipes, columns, 850.; and the object of the present invention is to produce a machine which can be used to make cores of various shapes and sizes, with or without holes or passages for ventilating purposes or for reception of stifiening-rods, the holes extending throughout the length of the cores, if desired. p

. The invention, in brief, comprises a feedhopper, below which is a removable cylindercasting, to which is attached a removable core-former adapted to form a core of a cer-' tain form and dimension and which can be replaced by other core-formers to produce different sizes or forms of cores. In rear of the cylinder are a series of reciprocating pitmen, preferably operated by eccentrics on a common shaft, but set so that the pitmen will complete their strokes in succession rather than simultaneously, and to the inner ends of said pitmen are detachably secured changeable plungers, which are provided in sets of different sizesto suit the difierent sizes of cylinder-castings in which the plungers operate to compress the sand or core-forming material fed from the hopper. Each set of plungers together conform to the shape of the chamber in the'cylinderin which they operate. Statiouary or movable rods are attached to or arranged between the plungers parallel with the line of reciprocation thereof and project into the core-former beyond the inner limit of the stroke of the plungers, said rods form ing the vent-openings in the core at desired points. Suitable means are provided for operatiugthe moving parts, and cores of any given size and form in cross-section can be readily made on the machine with rapidity and any length desired, the product of the machine being a core of any desired crosssection conformable to the interior cross-section of the core-former employed.

, While a single plunger might be advantageously usediu the machine, we prefer multiple plungers, for the reason that less power is required in tamping or packing the core tions constituting the present invention and for which protection is desired are summarized in the claims following the description of the machine illustrated in the accompanyingdrawings,which shows a practical embodimeut of our invention in the best form now known to us and which we will now describe in detail.

In said drawings, Figure 1 is a side elevation of the complete machine. Fig. 2 is a longitudinal central vertical section there through. Fig. 3 is a top plan view.

Fig. 4 is a detail front elevation. Fig. 5 is a front view of one cylinder-casting detached. Fig. '6 is a detail rear view of the plungers, showing their connections to the pitmen. Fig. 7 is a detail front view of a smaller cylindercasting.- Fig. 8 is a detail side View of a smaller plunger adapted to operate in the cylinder shown in Fig. 7. Fig. 9 is a detail 'view of a core produced by the machine shown in Figs. 1 to 4..

The hopper A is supported on standards B B, attached to the base-plate C, near one end thereof, said standards having bearings c? on their upper ends for the shaft 19, which carries agitators B within the hopper, adapted to feed down the material therein. The shaft 12 has a sprocket b on one end, driven by a'chain b from a sprocket b on the main shaft D, which is journaled in standards 0, rising from base 0 at the end opposite standards B.

Between the standards B, the bottom of hopper A, and base 0 is placed a cylinder, consisting of a casting having a through passage or chamber E, whose internal diameter and configuration conforms to theexternal diameter and configuration in cross-section of the core to be formed. In the top of the casting and communicating with chamber E is a feed-opening E, which communicates with the outlet of the hopper A and receives the material fed therefrom. On the top and front side of said casting is a short transverse flange E which fits into a correspondingrecess A in the lower front side of the hopper. In the base of said casting is a longitudinal slot E, which fits over a longitudinally-disposed rib O on the base 0. Also in the base of the casting is a transverse slot E, which when the casting is in position beneath the hopper coincides with a notch C in rib O and a locking-bar O can then he slipped into and through slot E and notch 0 locking the cylinder securely in position, as is evident from the drawings. The standards B have apertures B in their bases to'accommodate the bar 0 and assist in retaining it in position. In the front end of the cylinder, concentric with chamber E, is an annular shoulder or recess e, adapted to receive an annular fiangefon a collar F, attached to the inner end of the former F. This collar has diametrically opposite lugs f projecting radially therefrom and adapted to be engaged by retainers 6', attached to swinging arms 6 hinged to the opposite sides of the cylindercasting, as shown at 6 After the flangef is fitted into recess e and lugsf' engaged by retainers e the tube F is firmly held in axial alinement with and forms a continuation of chamber E. Said tube F corresponds in internal diameter, size, and contour w iththe' external form of the core to be made, tube F practically forming a long core former or shaper.

From what has been stated it will be obvious that the cylinder and core-formers are removable from the machine, and in practice we propose to provide each machine with a set of core-formers corresponding to the Various sizes and shapes of cores which it is proposed to manufacture.

Suitable means for packing the material into the core-formers as it is fed from the hop; per is provided, and we preferably employ the following-described mechanism for packing the material into the core-formers. Intermediate the standards B and O are two standards c, which stand transversely of the base and are provided in their upper ends with apertures or bearings o for a plurality of reciprocatory pitmen G, of which three are shown, arranged parallel and extending longitudinally of the base and in alinement With the chamber E and tube F. The pitmen G are respectively connected at their rear ends to eccentric-straps d, engaged with eccentrics 01, fast to shaft D, saideccentrics being preferably set at dilferent degrees on the shaft, so that when the latter is rotated the several pitmen will be reciprocated together, but in successive order. Secured to the inner end of each shaft G is a plunger g, and in a machine having three shafts, as shown, we preferably make each plunger in the form of a third segment of a cylinder, so that when arranged in alinement and juxtaposition on the 'ends of shafts G the plungers together form a cylinder corresponding in exterior size and shape to the internal size and form of the chamber E in the cylinder, which the three plungers together fit and fill as one plunger would do. In order to accommodate the machine to difierent sizes of cylinders, plungers must be provided of different sizes and changeable with the cylinders, so when a cylinder is changed properly-sized plungers may be placed in the machine to coact therewith. The plungers are therefore preferably made detachable from the pitmen, and, as shown, are provided with sockets g in their rear ends to receive the forward ends of the pitmen and are locked to the pitmen by pivoted catches 9 which engage slots or notches G in the pitmen, as indicated in the drawings. Any other desired means for detachably connecting the plungers to the pitmen may be employed. We do not restrict ourselves to the employment of three plungers. Two or more than three may be used. The shaft D is provided with a pulley D, by which it may be driven by belting from any suitable prime mover or transmission device.

To form vents or openings in the cores, one or more rods may be employed extending into the chamber E parallel with the plungers. These rods may be stationary and affixed to part of the machine in rear of the plungers, which are suitably chambered or grooved to allow them to reciprocate by or on the rods, or

invention, which, We repeat, is not limited to the specific forms or constructions of parts shown. Changes therein within the scope of our invention can be readily suggested by an experienced mechanician.

One essential feature of the invention is removable interchangeable core-formers, an other a plurality of plungers Working in the cylinders, and another the combination of these two principal features in one machine.

In the machine shown the operation is briefly as follows: A cylinder of the desired size is secured in place beneath the hopper, then the proper core-former tube is attached thereto, the proper relative plungers are next placed on pitmen G, and the hopper supplied with core-forming material. 7 I applied to shaft D, the plungers are reciprocated, and'the material fed into the cylinder is pushed outward and packed in the former E by the plungers, which act successively upon different portions of the material in the chamber E. (If desired, a filler-plug may be.

placed in the former-tube F or chamber E at the beginning of the operation to facilitate the formation of the core and proper compactness thereof.) As the core increases in length it is gradually projected from the tube F and may be ejected therefrom in any desired length upon a suitable receiver or carrier. (Not shown.) The core S may be cut into lengths desired before drying and then baked. When the rod H is used, a central hole or vent-opening s will be formed in the core, and by using rods h on the several plungers other holes 3' will be formed in the core. These holes extend longitudinally thereof and may be used for venting purposes to facilitate the drying of the core, or rods or bars can be slipped in the holes to'stiifen it, as is desirable in long cores. When another size of core is to be made, the machine is stopped, the core-former removed and replaced by a'core-former of the desired size, and the core-making operation repeated, as described.

The size of the cores that may be produced with this machine with any one of the cylinders is only limited by the strength or capacity of the plungers. For example, in the three cylinders illustrated by the drawings fortytwo different sizes of cores of all shapes can be produced. A core may be made with a coreformer smaller than the chamber in the cylinder, or we may make a core larger than the chamber in the cylinder, and that this core-.

former, as we term it, is detachable and may be made of any shape or size. A number of difierent sizes of cores can be made with our cylinder, only the core-former should not be so large that it exceeds the capacity of the cylinder or so small that the plunger cannot effectually work the material out of the cylinder. The casting directly under the hopper and the plungers does not have to be removed, except when making cores too large or too small for the efiective use of that particular cylinder.

Having thus described our invention, What we therefore claim as new, and desire to se- Power being gers all working within and together conforming to the contour of the chamber, means for operating the plungers in succession, and a changeable core-former attached to said chamber, and adapted to shape the core, substantially as described.

3. In a core-forming machine, ahopper, and a changeable chamber; with reciprocating pitmen, and changeable plungers attached to said pitmen and together operating in said chamber, substantially as described.

4. In combination, a hopper, a changeable cylinder, a changeable core-former attached to said cylinder, a changeable plunger operating in said cylinder, and means for operating said plunger.

5. In a core-formingmachine, a hopper, a

chamber thereunder, a tubular core-former attached to said chamber, a series of reciproeating pitmen in rear of said chamber, and

segmental plungers attached to said pitmen.

and all operating within said chamber in succession, for the purpose and substantially as described. I

6. In combination, a hopper, a changeable chamber thereunder, a changeable core-tube attached to said chamber, a series of reciprocating pitmen in rear of said chamber, and changeable plungers attached to said pitmen and all operating in said chamber, for the purpose and substantially as described.

7. In combination, a cylindricalcbamber, a plurality of segmental-shaped plungers operatin gin said chamber and together conforming to the contour thereof; vent-forming devices in said chamber, and means for operating the plungers in succession, substantially as described.

8. In a core-forming machine, a hopper, a

casting below the hopper having a horizontal chamber, a feed-openingcommunicating with the hopper, and setting and locking slots in its base; with means for locking the casting in position.

9. In combination, a hopper, a removable casting thereunder, having a chamber, a rib on top engaging a recess in the base of the hopper, a feed-inlet communicating with the hopper, and longitudinal and transverse slots in its base, with a centering-rib and lockingbar respectively engaging said slots to retain the casting in place.

10. In combination, a hopper, a removable casting thereunder having a chamber, a rib on top engaging a recess in the base of the hopper, a feed-inlet communicating with the hopper, and longitudinal and transverse slots inits base; with a centering-rib and lockingbar respectively engaging said slots to retain the casting in place, a series of reciprocating pitmen, plungers on the ends of said pitmen operating in said chamber and together conforming to the contour thereof; and means for operating said plnngers, substantially as described.

11. In a core-forming machine, the combination of a removable casting having a chamher, and a feed-inlet above said chamber, and swinging, locking-arms on the sides of the casting with a core-former detachably fitted to the outer end of said chamber; having lugs to engage the locking-arms for fastening the core-former to said casting, a feed-hopper above the chamber; and means for packing the material in said chamber.

12. In a core-forming machine, the combination of the hopper, a removable casting below the hopper having a horizontal chamber, a feed-opening in its top communicating with the hopper, and setting and locking slots in its base; with means for locking the casting in position, a series of plungers operating in said chamber; and means for operating said plungers in succession.

13. In combination, a hopper, a removable casting thereunder having a chamber, a feedinlet communicating with the hopper, and longitudinal and transverse slots in its base; with a centering-rib and locking-bar engaging said slots to retain the former in place, a core-former connected to the outer side of said casting; and means for detachably fastening said tube in place, substantially as described.

14. In combination, a hopper, a removable casting thereunder having a chamber, a feedinlet communicating with the hopper, and longitudinal and transverse slots in its base; acentering-rib and locking-barengaging said slots to retain the former in place, a coreformer connected to the outer side of said casting; and means for detachably fastening said tube in place, with a series of reciprocating pitmen, plungers on the ends of said pitmen operating in said chamber and together conforming to the contour thereof; and means for operating said plungers in succession; substantially as described.

In testimony that we claim the foregoing as our own we afii'x our signatures in presence of two witnesses.

HARRY L. BELL. CHARLES C. SWEITZER. In presence 'of JAS. E. TALBOT, ARCHD. G. GRAHAM.

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