US1010643A - Pattern for metal castings. - Google Patents

Description

G. H. KRAMER. PATTERN FOR METAL GASTINGS. APPLICATION FILED we. a, 1911.

1,010,643. Patented Dec.5, 1911.

2 SHEBTS-SHEBT 1.

3 34 6] Z! i Z O f 'G. H. KRAMER.

PATTERN FOR METAL OASTINGS. urmoumx FILED me. a, 1911.

1,010,643. Patented Dec. 5, 1911.

2 SHEETS-SHEET 2.

naw/$01 G'Hlframer.

12 PH cu.,wAsHlNnToN GEORGE H. KRAMER, OF DAYTON,.OI-IIO.

PATTERN FOR METAL CASTINGS.

Specification of Letters Patent.

. Patented Dec. 5, 1911.

A -Application filed August 3, 1911. Serial No. 642,149.

To all whom it may concern:

Be it known that I, GEORGE H. KRAMER, a citizen of the United States, residing at Dayton, in the county of Montgomery and State of Ohio, have invented certain new and useful Improvements in Patterns for Metal Castings; and I do declare the following to be a full, clear,.and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters and figures of reference marked thereon, which form a part of this specification.

This invention relates to new and useful improvements in patterns for forming the mold of elongated cylindrical members such as sash weights. Heretofore the method of casting such weights 'and other members which are required to be turned out of the foundry in great quantities, has been slow and tedious'as well as hard on the molder, and the experience of foundrymen has been that it is difficult to get workmen to do this particular kind of foundry work, owing to its laborious and trying character; and further, it has been difficult to obtain the most desirable castings under the method heretofore in use in the foundry. Owing to these impediments in the way of producing such character of castings, it is the object of the present inventionto provide a new and improved form of pattern so that a small or large number of such patterns may be used together in preparing the mold and'by the use of which the work is greatly facilitated so that the cost of production is reduced, and the work of producing is rendered far less laborious on the molder. The number of patterns whether it be large or small may be removed from the sand in a single operation, without endangering the formation of the mold. The individual patterns and the manner of the mounting are such as to altogether remove the possibility of injuring the mold.

A particular description of the invention will now be given in connection with the accompanying drawings, of which- Figure 1 is a side elevation of the assem is a bottom plan view of one edge of the mold within the cope portion of the flask;

Fig.4 is a side elevation of the pattern, the

same being shown partially lifted from the mold; Fig. 5 is a section through the cope on the line a.a of Fig. 3; Fig. 6 is a longitudinal, vertical sectional view through one of the individual patterns; Fig. 7 is a similar view showing a modified form thereof;

and Fig. 8 is a view partly in section, of the product or casting.

Referring more particularly to said drawings, 1 designates a board which constitutes the base of the assemblage of individual patterns, and to one side of which is attached a plate 2. Mounted on'the plate 2 is a plurality of these individual patterns which are employed for casting window sash weights. The individual patterns are all similar as to their parts, and the manner of supporting them on the board 1 so that they may have some movement in all directions out of a true perpendicular position. By reason of their looseness or freedom of movement, all of the individual patterns assume relatively perpendicular positions whenplaced in position in the flask, and in drawing them from the sand in a body each individual pattern yields in any direction to any irregular resistance in drawing them from the sand. A description of one of said individual patterns will suflice for all. Eachv of said patterns consists of a cylindrical member or tube 3 of a length or diameter to provide the necessary sash weight 30, as shown in Fig; 8; Said tubular part'is closed at oneend by a solid end 3 1 the end which occupies the lowermost position in the flask.

The other or upper end of said tube orpattern may be open as shown in Fig. 7, or partially closed as shown in Fig. 6, by inserting a ring 12 therein. As shown in the latter figure of the drawing, an apertured plug 9 is placed therein near the closed end,

and is secured in such position by a pin 9' or otherwise. Theportion of said stem im mediately adjacent to the conical end is reduced as at 6 to enable said end to enter the aperture 8. The stem4 at its upper end is rigidly secured to the plate 2, by means of a nut 5, and surrounding said stem at a suit able point below said plate is a rigid collar 10 having an upper tapered surface 11 which engages the lower end of the ring 12. The pattern 3 is thus suspended from the shoulder 11 and is free to have the necessary slight movement. In Fig. 7 the apertured plug 16 is of slightly different construction, having the aperture entirely through it.

The end 15 of the stem 4 projects through said aperture and is fitted with a nut 17 which performs the function of the shoulder 11 in Fig. 6. It is obvious that other means may be provided for supporting the patterns 3 in a position to allow some necessary movement thereof in manipulating the assemblage of patterns and for withdrawing them from the sand in a body. hen the patterns are in the position shown in Fig. 1, where the drag is ready to receive the sand, the ends 6 of the stems 4. lie within the apertures 8, and the lower ends of the in dividual patterns are held in position by a stripping plate 13, hereinafter referred to; consequently the individual patterns 3 will be prevented from moving sidewise when the sand is being packed and the mold is being formed. When the pattern as a whole is reversed to the position shown in Figs. 4 and 6, and is being extracted from the sand, the individual patterns recede from the board 2, and are carried by the collars 10 which are in engagement with the annular members 12. In this position the ends 6 are withdrawn from the apertures 8 and it will be seen that the individual patterns may have a lateral movement to accommodate themselves to the mold when being withdrawn fromthe sand. When the pattern as a whole is reversed to the position shown in Fig. 1, the conical ends 7 guide the ends 6 into the apertures 8.

In the construction shown in Fig. 7, the end of the stem 4, secured to the plate 2 by a nut 5 is provided with a conical portion 14 and a reduced portion 15 before referred to. The said conical portion is adapted to engage the edge of an annular member 16 secured to the individual pattern 3 at an intermediate point on the interior thereof. When the pattern as a whole is in an inverted position from that shown in Fig. 7, the lower end of each individual pattern is held against side movement by the stripping plate 13, hereinbefore referred to and hereinafter more fully described, while the upper portion is held in rigid position by the conical portion 14 engaging the annular member 16. When the pattern is inverted to be withdrawn from the sand, the indi vidual patterns assume the positions shown in Fig. 7, and each is carried by the nut 17 which is in engagement with the annular member 16. It will be seen from Fig. 7, that each individual pattern in this construction is capable of a lateral movement to accommodate itself to the impression in the sand in the same manner as the construction shown in Fig. 6.

The pattern as a whole may consist of any number of individual patterns 3 which may be arranged in any convenient manner on the plate 2.

As shown in Fig. 1, the drag 18, which receives the sand to form the mold, surrounds the patterns 3. The sand may be packed by any of the means known to the molders art. After the mold within the drag has been formed, a pallet 18 is placed on top of the drag and the assembled pattern and the drag are inverted to the position shown in Fig. 4, and asid pattern withdrawn from the sand. To permit said pattern and drag to be easily inverted, and the pattern to be withdrawn from the sand, the base-board 1 is provided with standards 19 on the outer ends of extensions 20, and buttons 21 adapted to be engaged by hooks or bails 22 which may be attached to a suitable elevating device (not shown). The but-tons 21 are approximately in alinement with the center of gravity of the mold, which allows the mold to be easily inverted.

To prevent the sand on the upper side of the mold becoming damaged when the pattern is withdrawn, the stripping plate 13 heretofore referred to, is provided. hen the pattern as a whole is withdrawn, the said plate 13 remains on the drag, being held thereon by gravity or any other well known means, and thus prevents the sand becoming broken along the upper face of the mold. When the said pattern is completely withdrawn, said stripping plate 13 is removed by standards 23 attached to the baseboard 1 and provided with heads 24. The said standards 23 extend through openings in the stripping plate, and the heads 24 engage said strlpping plate when the pattern is elevated above the mold.

The mold may be formed by any suitable form of pattern, and is adapted to form an eye 27 through which the sash rope passes, as will be seen from Fig. 5. The completed sash-weight 30 is shown in Fig. 8, where it is shown to be provided with a recess 31 which receives the knot of the sash rope. This recess is formed by wedgeshaped metal chills 32 which are placed in the imprints formed by prints 33 attached to the stripping plate 13. When the mold is poured, the molten metal will form itself around the chills, which, owing to their wedge shape, may be driven from the casting after it is taken from the sand.

The flat end surfaces of each of the heads 3 11 of the individual patterns have a raised figure or figures indicating the weight of each casting as taken out of the sand. Heretofore it has been the practice to cast such figures on the side of the sash weight, which was difficult to do successfully by the old method of casting such parts.

To provide a passageway for the molten metal, a vertical gate 34 is attached to the plate 2. The said gate 34 is connected with the various individual patterns 3 by a horizontal gate 35 and gates 36 which pass through openings 37 in the individual patlar pattern member is loosely supported so that it may be free to assume a perpendicular position as well as positions out of a perpendicular position while being manipulated, substantially as specified.

2. In a pattern for metal castings, the combination with a base board, of a plurality of patterns each consisting of a tubular member, and a rigid member projected from the base board into said tubular member, and cooperating means on the rigid member and on the tubular pattern member whereby said pattern member is loosely suspended on said rigid member and is free to assume a perpendicular position or deflect from such perpendicular position while the pattern as a whole is being manipulated, substantially as specified.

3. In a pattern for metal castings, the

combination with a base board, of a plurality of elongated patternsadapted to be assembled in parallel relation on said base board, each of said individual patterns consisting of a tubular form closed at one end and open at the other, a swivel piece fixed on the interior of said tubular form, and a stem rigidly secured to said base plate and having means thereon adapted to cooperate with the swivel piece on the interior of the tubular form in providing a loose support for said tubular form, substantially as specified.

4. A pattern for casting window sash weights, consisting of a tubular form closed at one end and open at the other, an aper tured plug fixed on the interior thereof, a rigid stem projected into said tubular form and having a part thereon engaging said apertur'ed plug and forming a pivot upon which said tubular member is supported, substantially as and for the purposes specified.

In testimony whereof I afiix my signa-f Witnesses:

MATTHEW SIEBLER, E. F. LOGES.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C.

Images