US1308926A

US1308926A - burkhardt

Info

Publication number: US1308926A
Authority: US
Publication date: 1919-07-08
Anticipated expiration: 1936-07-08

Description

JJ BURKHAR'DT. CASTING MACHINE. 1,308,926,

APPLICATION FlLEb NOV. 7. l9I6 Patented July 8, 1919.

I SHEETS-SHEET l'.

J. BURKHARDT.

CASTING MACHINE.

APPLICATION FILED NOV. I, 1916.

Y Patented July 8, 1919.

7 SHEETS-SHEET 2.

.- IINVEN1:OR

ATTORNEYS 1. BURKHARDT.

CASTING MACHINE.

APPLICATION FILED NOV- 7,1916.

1,308,926. Ptented July 8, 1919.

7 SHLETS-SHEET 3.

' IN VEN TOR yal mm ATTORNEYS J. BURKHARDT. CASTING MACHINE. APPLICATION Fl LED NOV- 7| I916.

Patentil July 8, 1919.

7 SHEETS-SHEET 5 J".BURKHARDT.

CASTING MACHINE. v

APPLICATION FILED NOV- 1916.

. Patented July 8, 1919.

7 SHEETS-SHEET 1;

||IIIIllll|l|IIIIIIIIIIIIIIIIIIII Wllll lllllllllIlllIllllllllllllllllllllllllllum llilllllllllll 1 mum" HEE' ;|lllllllllllIIIIIIIIIIIIII EL m \\\\llllwlllllllllllllllllllllnmm JOHN BUBKHARIDT, 0F NEW YORK-, N. Y.

CASTINGFMACHINE.

Specification of Letters Patent.

Patented July 8, 1919.

I Application flled fiovcmber 7, 1916. Serial No. 129,957.

' .To all whom it may concern:

Be it known that 1, JOHN BURKIIARDT, a citizen of the United States, and a resident of the borough of Manhattan, city, county, and State of New York, have invented certain new and useful Improvements in Casting-Machines, of which the following is a specification.

My invention relates to casting machines.

It has for its object to simplify and improve casting machines and reduce the cost of manufacture of castings; to enable castings of difierent lengths to be made from a relatively small number of molds without the necessity of having a special set of molds for every length of casting; to provide new and improved means forrcooling'molds, and also for making long castings and for preventing such castings from irregular and uneven cooling and contraction during the molding operation; and also to improve casting machines in other ways herein specified.

It consists of the novel devices herein shown and set forth.

In the drawings accompanying this specification and forming a part hereof, I have illustrated my invention in its preferred form, whichI will now proceed to describe.

Referring to such drawings,-

Figure-l is a side elevation of a casting machine embodying my invention;

Fig. 2 is a similar elevation on -a large scale of a part of the machine shown in Fig. 1; p

Fig. 3 is avertical section on the line 3-'3 of Fig. 4, and shows certain additional features not disclosed in Figs. 1 and 2;

Fig. 4 is an end elevation of the machine of Fig. 3, viewed from the right in the latter figure;

Fig. 5 is an' end elevation of viewed from the left in Fig. 3

Figs. 6, 7 and 8 are detalls of the molds of Figs. 1 to 5; Fig. 6 being a plan of one mold the same,

block; Fig. 7 a side view taken from the inside or center of the mold block, as indicated by the arrow in Fig. 6; and Figs 8 being a back view, the reverse of that of Fig. 7

Fig. 9 is a detail showing a cooling chamber in one ,of the top mold blocks of Fig. 3; Figs. 10 and 11 show details of the means for supporting cores; Fig. 10 being an elevation from the inside; and Fig. 11 a plan of Fig.,10;

Fig. 12 is a modification, showing means .or cylindrical casting;

to support the beveled portion of the mold block; J

Fig. 13 is a detail, showing the dowel pin and recess used to register two mold blocks 6o ratus for molding long castings, provided with a plurality of metal-pouring spouts and means for separating the lower mold blocks while the upper ones are belng filled with metal;

Fig. 17 shows, in section, a mold, con sisting of four parts or mold blocks, prov1ded for eight guldes, one set of four guides to .separate two of the mold blocks from the other two, and the other set of guides to separate the mold blocks still remaining to gether; v c

Figs. 18 and 19 are modified forms of mold blocks for use in making small castings; Fig. 18 bein an inner view in elevation of one mold bibck, and Fig. '19 a section on the line 1919 of Fig. 18;

Fig. .20 illustrates still another modification. v

Referring now to the machine illustrated in Figs. 1 to 5., 1 is the framework of the casting machine; 2, 2, are guides for the mold blocks, preferably made to diverge at the upper and lower .parts ofthe machine, for purposes presently to be descnbed; 3

and 4 are two series of mold blocks, the corresponding mold blocks "inthe .two series being adapted to be brought together to form a com-plete mold, and molding spaces of any suitable shape being provided in the faces of these mold blocks, as shown at 5 in Fig. 6, adapted to register with the corresponding molding spaces in the corresponding blocks of the other series.

The mold blocks of each series are loosely arranged upon one another and u on the lowermost block of the series, al of the blocks of the series being supported and moved by that block as itmoves.

Any suitable means of supporting the lowermost block of each series and for raising or lowering it may be provided, as well as any suitable'means for bringing the two series of mold blocks together and holding -the-In together during the casting operation.

blocks 3 and 4:, and passing over the hooked end 8'of the cross-bar 9. This cross-bar is supported on a hook 10 at the end of the cable 11, running over idle pulley 12, driving pulley 13, and having a counter-weight 14 at its end. Driving pulley 13 is driven, as shown, by a sprocket wheel 15, provided with a handle 16 and a link chain l7,passing around sprocket 1'5 and'sprocket wheel 18 of driving pulley 13. Counter-weight 14. keeps the cables taut and assists in raising the molds. The latter are raised or lowered by the turning of handle 16 one way or the other.

The means shown for pressing the two series of

mold blocks

3 and 4 together just before and during the casting operation consist of a series of weighted levers 19, pivoted to the framework at 20, and carrying on their inner faces idle rollers 21, mounted in bearings 22 in the levers 19. Cooperating with the levers and rollers are beveled edges 23 on the outer faces of the mold blocks 1, as clearly shown in Fig. 1. These bevels, as they are shown, extend outward toward the bottom of the outward faces of the molds. The levers 19 are weighted at their inner ends, or to the right as viewed in Fig.

3, and tend to tilt clockwise. When the mold blocks are raised to-casting position,-

that shown in Fi 3,+-the beveled faces of the molds 4 and t e rollers and levers 19 'cooperate to tilt the levers contraclockwise and force the mold blocks 4 against mold blocks 3 and the latter against guides 2, thus holding the two series of mold blocks tightly together during the casting operation.

Any suitable means may be employed for feedin metal to the molds. In Fig. 3, I have s own a metal reservoir 24 located in the uppermost mold blocksfprovided with a gateway 25 leading to the, molding spaces in. each of the molds.

The means shown for separating the two series of molds from each other consist of guides 26, having a common knife edge 27 at their upper meeting edges. These guides 26 diverge,as shown in Fig. 3, and are substantially parallel tothe diverging guides 2 at their lower ends. 28, 28, are water tanks into which the guides run.- After the molding operation, the two series of mold blocks arelowered, the knifeedge 27 and the guides 26 separating them, permitting thecasting to fall out and to fall between the two tanks,

while the two series of mold blocks are carried into the water in the two

tanks

28, 28,

water the

water reservoirs

29, 29, contained in the highest mold blocks, shown in Figs. 3 and. 9. These water reservoirs 29 in the uppermost mold blocks are especially serviceable there because of the presence in these mold blocks-of the metal reservoir 24. Such water reservoirs can, of course, be provided wherever desired.

The

guides

2, 2, are caused to diverge at their upper ends, in order to permit the two series of molds to separate, as they will do when pulled upward above the position shown in Figs. 1, 2, and 3, to permit access to the inner faces of the molding blocks for any purpose,as, for instance, for inserting cores. 30 is a stop to. prevent the mold blocks from being pulled too high, and to act as a registering stop when-the molds are pulled upward from the watertanks. It will be understood, of course, that this is made removable in case it should be desired to pull the molds ,upward and to cause them to separate, as above described.

By means of the loose arrangement of mold blocks upon one another, as above de* scribed, castings of different length may be made without the necessity of making a spe;

cial and complete set of molds for each par usual ordinary lengths, and of almost any length, may be made from a r'elativelysmall number of molds. This effects a great saving in time and expense. In my improved arrangement, moreover, no subgateways are required for leading the metal to the different molding spaces.

I preferably provide air spaces for cooling of the casting cools materially faster than the upper part, often resulting in injury to the casting or breaking or cracking ofthe casting. In Fig. 16, I have illustrated a combination of, means for preventing this result. Here the mold blocks are moved during the casting operation, and during that operation the lower blocks are separated to free the lower part of the casting premature cooling from the mold blocks, while the upper part of the casting is still being poured. I have shown this arrangement in Fig. 16 only diagrammatically, without all of the details, such as the means for moving the moldblocks continuously during the. operation. Of course, any suitable means could be emiza 95 ticular length of casting. Castings of the ployed for thisand any other suitable details for other parts of the apparatus. The

lower part of the casting 32 being made is shown as projecting downward, being freed from the lower mold blocks. It will be understood that the upper part of this same casting, which is shown as a pipe, is in process of being formed.

While in this arrangement any suitable means may be employed for supplying the metal to the molds, I have shown a plurality of metal reservoirs evenly spaced throughout the length 0f the mold blocks. These are shown in the form of horns 33, projecting from the side of the mold blocks. Metal is poured into these horns at the proper time duringv the process, and flows thence to the molding spaces.

In Figs. 10 and 11, I have shown means for readily supporting cores. As there shown, 34 is a core supported in hooks 35, secured to the mold blocks. 36 represents a sub-gateway for leading the metal to the molding space 37.

In Fig. 12, 38 is a support for the beveled section 39 of a mold block, in order to give it suflicient strength at its middle portion, and'to allow for expansion and contraction without cracking. 1

I preferably provide dowel pins and holes in the different mold blocks,,in order to register them with one another, both when the-mold blocks are placed ne upon another in a series, and when the mold block of one series comes into engagement with its corresponding mold bloek .of the other .series. In Fig..-13, I have illustratedthis 40 is a dowel pin secured in one of the mold blocks and entering a hole or seat 41 for it in the adjoining mold block. This causes contiguous mold blocks to register exactly with each other.

In Fig. 14 I have shown mold blocks adapted to cast a flange on a bar or cylindrical casting. A molding space for forming this flange is shown at 42.

Fig. 15 represents 'a number of mold blocks, viewed from the inside, for making cylindrical castings, and showing curved horizontal joints between the different mold blocks. In this figure, the moldingspaces are shown at 43, the metal reservoir at 44, and the gateways at 45. Here a portion of the surfaces of the adjoining mold blocks is curved, as shown at 46. A

In Fig. 17 I have illustrated a mold ,composed of four mold blocks 47. The molding spaces are represented at 48; 49 are the metal-pouring spouts; 50 are eight spaces for holding eight guide rails for controlling the movements of the four mold blocks composing the mold. These guides are not shown, but are so arranged as to separate two of the mold blocks from the other two, dividing the mold into two parts, and then each half is divided into its two halves for 4 the discharge of the cast material's.

Figs. 18 and 19 represent modifications of mold blocks for use in making small castings. 51 represents .the molding spaces in a small molding block 54; 52 the gateways.

The small block 54 with this molding space i This will make it easier and cheaper to make the active part of the mold block, dispensing with great weight, and effecting a saving in the iron or'steel employed.

In Fig. 20, I have shown a modification, in which a'metal reservoir is provided in the stationary part, the mold blocks being adapted to be brought up from beneathinto connection with it. tionary part provided with the metal reservoir 58. 59 are passageways for the metal. The different mold blocks of a series are represented at '60, and their molding spaces at 61. 62 are the gateways for the metal. I have shown these preferably as provided at their upper ends with saucer-shaped expansions 63 for catching and preventing the escape of the metal. 64 are dowel pins for registering the mold blocks with the stationary part 57. These dowel pins enter holes 65 inthe upper mold blocks 60, as already 57 represents the staexplained. The shoulders on pins 64 act as spacers between mold block.

In order to provide against undue expanpart 57 and the uppermost sion of the face of the mold" block, due ,to

. the mold itself. This is illustrated'in Fig. 6,where I haveprovideda split or division at the points. 66. These are shown running from the inner face of the mold block and connecting with, the air spaces or chambers 31.

In this figure and Fig. 7 I also show a vent 67 running from the molding space to the outer air, for the discharge of gas.

If desired, the inner face of the mold block may be hinged, as shown at 68 in Fig. 12. What I claim as new and desire to secure by Letters Patent is 1. In a casting machine. the combination of two series of moldblocks adapted, when brought together, to coiiperate with each. other to form complete molds, the blocks of each series loosely arranged upon one an other, means connected with the lowermost block of each series for supporting, raising or lowering the said series, means for fore 'tion, and means for separating them after the operation to discharge the cast articles. 2. In a casting machine, the combination -of two series of mold blocks adapted, when blocks of one series, and weighted pivoted arms carrying rollers adapted to be struck by the beveled edges as the molds move into casting position and to move the pivoted arms into line with the mold to exert pressure to force it against its corresponding mold block of the other series.

- 3. In a casting machine, the combination of two s ies of mold blocks adapted, when brought together, to cooperate with each other to form complete molds, the blocks of each series loosely arranged upon one another, means connected with the lowermost block of each series for supporting, raising or lowering the said series, beveled surfaces on the outer faces of the mold blocks of one series slanting downwardly and outwardly, pivoted arms weighted at their ends toward themold blocks and, carrying rollers .adapted to be struck by the beveled surfaces as the mold blocks rise and to be carriedupward so as to exert" pressure upon the mold blocks when casting position is reached to force the mold blocks of one series against the mold blocks of the other series, and means for separating the mold blocks of the two series to discharge the cast articles.

- 4. In a'casting machine, the combination of two series of mold blocks provided with grooves in their outer edges adapted, when brought together, to cooperate with each other to form complete molds, the blocks of each series loosely arranged upon one another, means connected with the lowermost mold block of each series for lowering and raising the mold blocks, guide rails ,engaging with the grooves in the outer edges of the mold'blocks of each series for guidingthe mold blocks, said guide rails divergln'gs or separating toward their lower end and passing into water tanks, inner guide rails opposite the lower diverging portion of the above-mentioned guide rails and substantially parallel thereto and leading into the water tanks, the said inner guide rails meet-. ing at the top in a knife edge underneath the dividing'line between the two series of mold blocks for separating the mold blocks of the two series when lowered, and means for forcing the mold blocks of one series against the mold blocks of the other series when the mold blocks arein casting posi- Qtion, al so arranged and combined that when the mold blocks are moved into casting po= of two series of mold blocks adapted, when brought together, to coiiperate with each other to form complete molds, the blocks of each series loosely arranged upon one another, means connected with the lowermost mold block of each series for lowering and raising the mold blocks, guide rails engaging with grooves in the outer edges of the mold blocks of each series for guiding the mold blocks, said guide rails diverging or separating toward their lower end and passing into water tanks, inner guide rails opposite the lower diverging portion of the.

above-mentioned guide rails and substantially parallel thereto and leading into the water tanks, the said inner guide rails meeting at the top in a knifeedge underneath the dividing line between the two series of mold blocks for separating the mold blocks of the two series when lowered, and means for forcing the mold blocks of one series against the mold blocks vof the other series when the mold blocks are in casting position, a metal reservoir in the uppermost mold blocks and water chambers in the said blocks, all so arranged and combined that whenthe mold blocks are moved into casting position they will be forced and held togetherand when lowered will be separated to discharge the cast articles and the mold blocks will be guided into. the water tanks to be cooled and to fill the water cooling chambers in the mold blocks.

6. In a casting machine, the combination of two series of mold blocks adapted, when brought together, to cooperate with each other to form complete molds, each series loosely arranged upon one another, means connected with the lowermost mold blocks for raising or lowering the mold blocks ofeach series, guiderails cooperating with grooves in the outer ends of each series of mold blocks for guiding the mold blocks, said guide rails diverging toward their upper and their lower ends to permit the blocks of access to the inner molding spaces of the two series of mold blocks when they are separated at the upper diverging ends. of the uide rails and to permit the mold blocks of t 'e two series to separate to dischargethe cast articles when theyseparate at the divergence of the guide rails at their lower ends.

7 In a casting of two series of'mold blocks adapted, when brought together, to cooperate with each machine, the combination other toform complete mblds, the blocks of each series loosely arranged upon one another, means for raising and lowering the mold blocks, guides for controlling themoveother, means for raising or lowering the ment of the mold blocks, said guides divergseries of mold blocks and for bringing them ing at the top and bottom so that when the together for the casting operation, and

blocks are pulled up toward the top or moved means for separating the lower mold blocks 20 down toward the bottom of the guides they while the molding operation is still proceedwill separate, and when they are moved to ing in the upper blocks, whereby the lower the middle portion of the guides the two separt of the casting will be removed from the ries of mold blocks will approach each other molds while ,the upper part of the casting to bring corresponding mold blocks together, operation is proceeding, whereby long 25 and means for pressing the mold blocks tolengths of castings may be made without in gether at such central point. regular and undue cooling and contraction 8. In a casting machine, the combination In different parts of the casting. of two series of mold blocks adapted, when In testimony whereof, I have signed my brought together to cooperate with each name to this specification. other to form com lete molds, the blocks of each series loosely arranged upon one an- JOHN BURKHARDT.