US851166A - Molding-machine. - Google Patents

Description

No. 851,166. PATBNTBD ABR. 2s, 1907.

G. HERMAN. MOLDING MACHINE.l APPLICATION FILED JUN'E 22. 1905.

4 SHEETS-SHEET 1.

PATENTED APR. 2s, 1907.

C. HERMAN. MOLDING MACHINE. APPLICATION FILED JUNE 22. 1905.

4 SHEETS-SHEET 2'.

Fgg.

INVENTOR 110.851,16. PATENTBD 1111.23, 1907.

C. HERMAN.

MOLDING MACHINE.

1111110111011 FILED 11111322. 1905.

4 SHEETS-SHEETS.

PATENTED APR. 23, 1907.

C. HERMAN. MOLDING MACHINE. APPLIGATION FILED JUNE 22. 1905.

4 SHEETS-SHEET 4.

MIIIHI wnNEssEs orni'nnns HERMAN, or innnennnr, rnnnsrnvanm, Assieuon To HERMAN FNEUMATO MACHINE COLIIPANY,

F ZELlENOPLE,

PENNSYLVANIA, A CORPORATON @F PENNSYljVANlA.f

no. serios.

Specification of Letters Patent.

Patented April 23, i907.

Application filed June 22, 1905. Serial No. 266,480.

To LM whom it` may concern:

'Be it known that l, CHARLES HERMAN, a resident oit-Allegheny, in the count-y of Allegheny and State of Pennsylvania, have invented `a new and useful Improvement in i Molding-lldachincs; and l do hereby declare the following to be a full', clear, and exact description thereof.

My invention relates to molding machines and has special reference to that class ol' sand molding machines shown in Letters Patent No. 706,751 granted to me on August 12,1902. The obj ect of my invention is to provid ea cheap, simple and effective device for lifting the llask from around the pattern resting upon the jarring device, after a mold has been formed in said flask, in an even, rapid and easy manner and without the employment of laborious and uncertain devices.

v further object of the invention is to cheapen, simplify and render more eil'eetive the jarring mechanism and thereby compact the sand around the pattern in the il ask more j rapidly and evenly.

. normal position.

4parts in a normal position.

To these ends my invention consists, genorally stated, in the novel arrange1nent, con struction and combination of parts, as hereinatter more specifically set forth and described and particularly. pointed out in the claims. Therefore, to enable others skilled in the art to which my invention appcrtains 'to construct and "use my improved molding,

machine, I will describe the same more fully,

`referring' to the accompanying drawings, in

Figure lis a side elevation oi my improved molding machine showing the parts in their Fig. 2 is an end View and partly insection of the same, showing the mold and flask raised 'iron'i the pattern after the `sand has been jarrcd and the Amold formed. Fig. 2 a like view showing the Fig. 3 is a vertical section oi-the jarring devices. Fig. 4 an enlarged vertical section ol the 'valvechest 'and looking at the 'lace of the valve. Fig. 5 is a top plan view oii the inachiiic with the pattern-plate removed. Fig. is a crosssection on the line (l--G Fig. 4.

Like symbols of reference herein indicate like parts in each ol the figures of the drawings.

As illustrated in said drawingl is the base plate upon which my improved molding machine is supported and upon which the usual jarring-block l is secured, while extending up from said base-plate and around said block. is the cylindrical casing 2 which is provided with the enlarged upper end 2 and is i secured to said plate bythe bolts 3 passing through the flange 3 on said casing and taking into said base-plate. Nithin the casing 2 is the jarring post 4 which has the crosshead 5 litting around and secured to the upper end of the same and on this head are a series oi upwardly extending projections or lugs 5 which slide on the guides 5 and support the pattern-plate 6 on which the pattern 6 mounted, while said pattern-plate is provided. with a series ol lugs 6 lor supporting a stripj'iing-plate 7 upon which is carried the ilask 8 having lues 8 extendinv out from b b D the saine for engaging with the dowel pins 7" and with the lugs 7 of the stripping-plate.

The lower end ol the jarring post 4 is adapted to contact with the jarring-block in the operation of jarring, as hereinafter described, and the raising` and lowering ol this post is accomplished by the arring mechanism which is located in the casing 2 and coinl. prises a cylinder Sl which extends around said post and is held in place and stationary by being suitably secured to the casing 2. The cylinder 9 is provided with the usual heads 9, and stulling boxes 9 thereon through which the post 3 is moved, and such post is provided with a piston l() secured thereon vfor working within said cylinder, while from the upper heed pipes il project upwardly to allow the air within the cylinder above the piston to escape in its upward strokel to prevent any cushioning action within said cylinder and at the saine time permit the air to enter said cylinder in the downward stroke to assistthe -lrce movenient ol said piston, such pipes having elbows l1 at their upper ends in order to prevent any sand dirt ctc. entering said cylinder throughsaid pipes. The cylinder l) has the valve-chest l2 within which travels a slide valve 13 which is provided with. the narrow supply )ort 13 -within the same and the large ex vcust chamber 13 which are adapted to communicate with the supply and eX- haust ports 14 in the cylinder wall leading through and into the lower end of the cylinder 9 and the auxiliary exhaust-port la in said cylinder wall, while the latter port` 11i opens at itsl lower end into the casin l2. Connected to the slide-valve 13 is the va vestern` 15 which moves through the usual stuffing boxes 12." on each end of the valvefchest 12 and through a lug 5/ on the cross-head at the upperend of said stern, while the movement of the stem is limited by the nuts onsaid stern. The valve-stern ts within a yoke l13W on. the valve 13and is held in vplace by the shoulders 15? on said stem fitting against each side of said yoke, while bar's 16 are placed on said valve and s rings 16lv 'are `interposed around 16 on sai vbars flandfbetweensaid bars and the enter Aside of' the valve-chest'12 to hold said valve in place yagainst the walls of the cylinder 9 and cover the ports 14, -14.therein. Leading from any suitable source ofsupplv is the valve controlled supply pipe 17V which'passes through the walls of the casing 2 and 1s screwed into the outer sidewall of the valve-chest 12 for supplying. thauid pressure into said chest.

The liitin pacting oft e sand therein by the Vjarring mechanism above described so as to form the mold cavit 8 by the"v pattern 6 is an operation simi ar to that shown and described in the patent referred to and in Let# ters Patent N o. 647,673 granted to Henry C'. Herman, April 17, 1900 for a molding Inachine and consists of two lifting, v devices placed one on each side of the casing 2 having the shafts 18 provided with crss`pieces 19 at their upper ends, on which the horizontal extensions 20 are mounted, which are plate 1.

ends with an upwardly extending removably secured to each end of said crosspieces' by the adjusting bolts 19 passin through holes 20 in the extensions an taking into the said cross -pieces These horizontal extensions are provided with a number of holes 20 or slots if desired therein to permit the adjustment of the same for different sizesof stripping-plates and flasks and they are also provided at their inner flange 20" for engagin with the stripping p ate to raise it and the ask when desired and as hereinafter described.

The lifting-shafts 18 are connected to the cross-pieces 19 at their upper ends by means of the sockets 2()a formed on said pieces and are held therein by means of the set-screws 20b passin through said sockets and engaging with t e said shafts. Below the crosspieces 19 the shafts 1S pass through caps 21 and into cylinders 22 which are secured at their lower ends by the threaded connections 23 within sockets 23 formed on'the base- These shafts 18 have pistons 18 .secured at the lower ends thereof and4 they Yare also provided with a key 24 therein with ofthe liask `8 after the com-' which a key-way 24 in the caps 21 engages' in order to keep said shafts from turning. The caps 21 are secured by bolts 21 to the brackets 25 which extend out from the cas-l y ing 2' and are secured thereto by bolts -125 passing through flanges 25' on said brackets and taking into said casing. These brackets 25 in addition to supporting the ca s 21 also have the upper ends of thecylin er 22 extending into the same lwhere they are sup Eorted and secured by a threaded connection l 2.3 atthe lower ends their opposite ends are connected` to a .'1-

coupling 26 which is connected to the branch-pipes 27 extending at right angles to the branch-pipes 26 from which the vertical pipe 27 extends upwardly in front. of the casing 2 and is supported by the bracket 2 8 4-extending from and secured to said casing 2'. At the upperl end of the vertical pipe 27 is the three-way controlling valve 29 to which is connected the supply pipe 29 whichleads from any suitable .source of supply ah'd such valve is provided with the operating handle 29. VBetweenthe caps 21 and brackets 25V are the vents 30st which will allw the air' within the cylinders 22 and above the piston IOO 18 to escape on the upward movement of the l shafts 18 in order to prevent any cushioning action within saidcylinders and atthe same timeperrnit the air to enter said cylinders in the downward movement V`of said .shaft in order to assist the free movement of said pis ton.

shafts 18 and secured thereto by the set screws 30 are the brackets 30 which extend out therefrom and have pins 30 secured therein to which the links 31 arepivotally connected at one end while the Opposite ends of said links are pivotally connected to the forkedends 31 of the arms 32. The arms. 32 are secured by a key connection 32 at their opposite ends tothe ends of a rockshaft 32 which extends across in the rear of the casing and acts to connect the two lifting devices together so that they shall move in unison. This shaft 32 is mounted in the upper ends of the standards 33 andsuchstandards are secured to 'the base-plate 1 by the bolts 33, While the shaft is held in position by means of collars 34 thereon fitting against said bearings and secured to said shaft by the set-screws 34.

Extending through holes 35 in a projecting portion 25 on the bracket 25 are the vertical rods'35 which are carried by the bracket Extending around the upperend of the and. pass through holes 35 in said brackets 30. These rods are hung from the brackets 30 by the headsI 36 at their upper ends and their lower ends are provided with the spiral springs 36 which are held thereon by plates 37 fitting around said rods and against the adjusting nuts 37 engaging with the lower ends of said rods, such springs acting to engage with the projecting portions 25 on the brackets 25 when the shafts 18 are moved upwardly and thereby overcome any shocks or knocks taking place to the parts in such movement. The nuts 37 will also permit the raising and lowering of the springs 36 along the rods 35 in order to permit the adjustment of the said springs at different heights on said rods to vary the heights to .which the lifting shafts 18 may be raised.

Supporting rods 38 are secured at their lower ends to the base-plate 1 by a threaded `lugs y6 of the pattern-plate, after which the flask is placed over the pattern andL held in fplace by the dowel pins 7.

then filled with sand and the operatorap- "plies the o erating fluid, preferably cornj pressed air The flask 8 is rom any suitable storage tank,

".ja'irpump or other source of isupply through through the narrow port 13" in the side-.

, the supply pipe 17 into the valve chest 12 and y passing around said chest will )ass valve and thence into the cylinder -9 through theport 14 a'n'd raise the piston 10 anclfpost 4 to their highest position.

v Y head lconnected to said post is also raised andbyreason of thelugs 5 on said cross-- jliead-iitting 'under rand against the pattern- As the pistoni() and post 4 are thus raised the crossplate 6 ythe saidv plate, pattern 6, strippingplate 7 and ilask 8 containing the sand are all raised. As the cross-head 5 is thus raised the lugm thereon will strike against the upper nut i5 on the valvestem 15 and so raise the stem and slide-valve 13 so that the supply port .13 will be covered and the exhaust chamber 13 will be placed "in communication with the ports 14, 14 in the cylinder 9, thereby'shiitting off the supply of air to said cylinder from the pipe 17 and allowing .the air to exhaust through the ports 14, 14', which will permit the post 4, cross-head 5,

-pattern '6 and ilask 8 to drop so that the )wer end of the said post will strike against the jarringblock to compact the sand in the said flask around the pattern'. Just before the time that the lower end of the post 4 has struck the jarring-block, the lug 5" on the cross-head 5 will have come in contact-with,`

the lower nut 15 on the valve stein 15 which will ac't to lower said stem and valve 13 thereon so that the narrow portlB will again communicate with the supply ort 14 and admit the air to the cylinder 9 t ough said ports s 'raise said flask with 'its inold cavity from around the pattern, the operator turns the handle 29 of the valve 29 in the proper direction which will allow the fluid pressure, and preferably compressed air from any suit able storage tank, air pump or other source of supply to pass through the supply ipe 29 and through the vertical and brano pipesl 27 27 and 26 to the cylinders 22. As the air thus enters the cylinders 22 and under the pistons 18 it will act to raise said' pistons and shafts 18Y thereon through the' ca s 21 and with them the cross-pieces 19 an( brackets 30 and as these partsl are also raised the projections or flanges 2Ol on the extensions 20 of said cross pieces will engage with the bottom or the lugs 7 of the stripping-plate 7, thereby raising said plate and with it the flask 8 away from the pattern-7 while the lOO pattern and pattern-plate 6 remain stationary on the cross-head 5, during this operation, as shown in F ig. 2. During this operation of raising the shafts 18 and flgask 8 it will be evident that both shafts will be controlled in their movement and will be raised simultaneously and in unison by reason of the saine being cou led or connected together as before describer` After these parts are thus raised they are held from dropping by .the pressure of the air within the cylinders 22, so

that when the stripping-plate 7 and flask 8 have been thus raised above the to of the IIO pattern 6, the operator lifts the las `oli the stripping-plate and carries it to any suitable place, after whicfi the lifting shafts'lS andy their connecting arts can be lowered by turninghoi the va ve 29 which will allow the air wit in said cylinders to pass therefrom and return through the branch, vertical and supply-pipesrand escape through the valve 29, thereby returning the lifting devices to their normal positions, as shown in dotted lines in Fig. 2 and. readyfor another operation of lifting the flash lt will be evident that other fluid than airsuch as steam etc., can be used to operate IOv the motor 'ofthefjarring' mechanism, as well as the lifting. devices, and that ,various other modifications and changes in the construction and operation of the machine may be resorted to without vdeparting from the spirit of the invention or sacrificing any of its advantages.

My machine is simple in its construction and operation, Vis veryl durable and by its use it has been found that'the sand will be easily,

, 'rapidly and thoroughly packedv around the pattern to form a perfect mold cavity. The

stripping-plate and flask can be easily,

quickly and uniformly raised from around the pattern and without the employment of any hard or manual labor. The lifting shafts for raising the flask will be controlled at all times by the toggle joint connected with the rock shaft, thereby overcoming any tilting or wabbling of the liask in such raising operation, and preventing any liability ofinjury to the mold cavity within such flask.

What l claim as my invention and desire to secure by Letters Patent' is:

1. In a molding-machine, the combination of a base, a casing mounted thereon, a pattern-plate supported by -the casing, a stripping-plate supported by and above said pattern-plate and carrying a flask, pov. er cylin` ders mounted on opposite sides of said casing, lifting shafts operated by said cylinders for raising and lowering the stripping-plate, a rock-shaft mounted on said base and extending across the same andat some distance from the exterior of the casing, and connections between said rock-shaft and said lifting shafts whereby the said lifting shafts are caused'to move in unison; substantially as described.

2. 'In a molding-machine, the combination of a base, a casing mounted thereon7 a pattern-plate 'supported by the casing, a stripping-plate supported by and above said pattern-plate and carrying a flask, power cylinders mounted on opposite sides of said casing, lifting shafts operated by said cylinders for raising and lowering the stripping-plate, a

rock-shaft mounted on said base and exterior brackets secured to said base, a rockshaft` mounted in said brackets exterior to said casing and extending across the base, and toggleflevers connected to said rock-shaft andlifting shafts whereby the lifting shafts are caused to move in unison, substantially as described.

In testimony whereof, l the said CHARLES HERMAN have hereunto set my hand.

CHARLES HERMAN. Witnesses WALTER FAMAniss, J. N. COOKE.

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