US1456319A - Molding machine - Google Patents

Description

May 22, 1923.- 1,456,319

' W. LEWIS MOLDING MACHINE Filed Jan. 1e. 1922 .4 sheets-sheet. 1

May 22, 1923.

. 1,456,319 w. Lr-:wls

MOLDING MACHINE Filed Jan. 16 1922- 4 Sheets-Sheet 2 [NVE/WOR May 2.2, 1923.

W. LEWIS MOLDING MACHINE Filed Jan. ne. 4 sheets-sheet W. LEWIS May 22, 1923.

MOLDING MACHINE Filed Jan. 16 1922 4 Sheets-Sheet -4 Patented May 22, 1923. y

stares WILFRED LEWIS, or Hiwnaroan, PENNSYLVANIA, AS'sIeNoR To 'THE TABOR ,Mii.1\ ul FACTURING COMPANY, OF'PIIILADELPHIA, PENNSYLVANIA, A coRPoRATIoN' or PENNSYLVANIA.

PATENT? oFIFICE.;

HOLDING MACHINE.

Application filed January 16,1922. `Seria1`No- 529,447.

To all 'whom it may concern:

Be it known that I, WILFRED LEWIS, a-

citizen of `the United States of America, and resident of Haverford, -in the county of Montgomery, in the State of Pennsyl- Vania, have invented certain new and useful Improvements in Molding Machines, of which the following is a true and exact description, reference being had to the accompanying drawings, which form a part thereof.

My invention relates to jar molding machines adapted to pack sand on a pattern' in a flask by jarring and then roll over the mold and draw the pattern and, more particularly, my invention relates to the type of machines of this class known as combination trunnion machines, as distinguished from jar combination machines in which the roll over plate is pivoted to the lifting and roll over mechanism at the side of the jarring machine element of the apparatus.

Hitherto, roll over trunnion machines have, so far as I am aware, been con-L structed with roll over trunnions permanently attached to the roll over plate,

with the effect of concentrating a heavy deadv load at each end of the plate which is highly undesirable as the first requisites of a good jarring machine are absolute solidity on impact and uniform distribution of the shock. Again, the roll over mechanism must' be quick acting, swift and effective and the pattern draw must be well-nigh perfect to properly handle deep patterns with' almost parallel sides.

With the above Jfacts lin view, it is the object of my invention to provide'a combination trunnion machine so constructed that the roll over plate is entirely detached from its trunnions during the jarring of the mold. A further important object of my invention is to so construct the machines that the roll over plate can be adjusted with respect to the axes of the trunnionsk so as to accom-- modate ilasks of different sizes and so that in rolling over after the jarring of the mold the'flask will overbalance the plate, and sok line 6 6 of Fig. 4e.

squarely beforey rolling andthe pattern plate held irmly in alignment during the drawing of the pattern. y

Still another object of my invention is to so connectthe trunnion supporting and lifting mechanisms that they will move together in unison. t

Another object which I have in view, and

which relates particularly to an apparatus in Vwhich a shockless jarring machine is-y used, 1s to bring the table or head of the jarring machine to the floor level when thev roll over plate is at its highest position lso that a car can be conveniently used to receive the finished drag mold. V.

'Other objects which have? ,in view will be best understood as described in connection with the drawings which illustrate an ap? paratus constructed in accordance with my` invention and in which-` Figure l is a front elevation of a machine` .embodying my improvements shown partly in section.

Figure 2 is an end view of the apparatus,

certain details being shown in section.

Figure 3 is an end view `similar to that'fso shown-in Fig. 2 but showing the trunnions in their upper position and the rollover plate and attachments in roll over'position.

Figure 4L is a sectional view of the locking mechanism attached' to the trunnions and' adjustable with respect' thereto, the view being taken as on the line H of Fig. 6.

Figure 5 is a part of the naechainsrn'rjk shown in Fig. 4.

Y Figure 6 is also the end, view of the ap'- paratus shown in Fig. 4, withY the lockingi mechanism shown inlcross section on the Figure 9 is a sectional elevation of: aide!V tail.

A indicates the jarring v.machine whichy 'may be of any approved kind and construction. A indicates the plunger or'anvil of sectional view on the the jarring machine, the topA or table of!" `which is indicated at A2.V Bis the jarring"y head which rests upon the portion Az'ofthe anvil and supports the table. B2 on which the roll over plate rests and lwhich is conveneA iently formed with ribs asindicated at B3 which canserve as tracks for the truck used to carryy awayfrthe molds. B4 B4 indicate sockets" for receiving pins attached to the roll over plate for properly centering the plate. on the vhead B12, and C is'a pin eX- tending down 'from the jarring head into a guide lug A3 on the cylinder of the arling machine for holding) the jarring head inl proper alignment. indicates bushings pivoted in the sockets B4. E is the roll over plate having attached to its lower side the lockingbar indicated. at E having, as

'i shown, vtapered lugs E2 adapted to be en- 'diameterin which fit the vertically movable pistons or plungers indicated at H2 supporting on their upper ends heads H2 in which areformed bearings H* for the trunnions and abovewhich are secured cap pieces indiated at H5. 1,-, P, yare adjustable stops secured to the cap'p'ieces H5, the function of which will be hereafter described. J and J are the truninon's resting in the bearings H4 of the heads H3 and having attached to their outervends thelever arms indicated at J by means of which and mechanism to be described, they are oscillated .through an arc of 1800. K, K, are arms secured to the triinnions J and extending, as shown, at right. angles to the le-ver arms J. These arms K. are, asl shown, provided with adjustingjperforations indicated at K, K, etc. L, L,fare locking heads supported on the front faces ofthe arms K and adj ustably attached thereto in such a manner that they can be adjustedytoward and away from the axes of the truninons They are attached to the arms K'by clamps indicated at L and bolts indicated at L2, best shown in F ig. 7, and vare held in iroper adjustment by the locking bolts inc icated at M, normally pressed inwardV by springs M and withdrawn through handles M2. These bolts extend through bearing perforations yin the locking heads L, indicated at L3, and the tops of the locking heads are slotted as indicated at L* to give passage vto the llocking bars E of the roll over plate. N, N, are pivot pins supported in the head L and supportingthe VVswinging links indicated at N, N, which inturn, through pivot pins N2, N2 support the' rod or bar indicated at N3. 0 is a head firmly secured to the rod N3 and from which extends the locking jaw indicated at O and also theA downwardly extending arm indicated at O7. 'O2 is a sleeve movable on the rod N3 and havingr a locking jaw indicatedv at O"x and the downwardly extending arm indicated at O6. O5, O5, etc. are spring adjusting bolts secured in the sleeves O and O2 and by means of which thev spring O4 can be adjusted. P is a lever pivoted tothe arm 06 at Pand connected through'an arm P2 and pivot pin P3 with a link Pt pi'voted to the arm O7 at P5. PT is a roller carried on the' end'of the lever arm P and in posit-ion to be engagedby the contact arm Q, see Figs. l and 2, as the roll over plate is rolled over by the truninons.

Secured tothe plunger heads H3 and extending downward in the form ofcylindrical sleeves enclosing the cylinders H, H", as shown, are frame members indicated atfR, to the rlower ends of which are .connected the beams indicated at Pt which connect the two rsleeve-like extensions of the frame to?- gether and on which are supported the cross beams indicated at R2, carrying adjustable contacts indicated at R3 so located that when the frame moves upward these adjustable contacts will rome in contact with the shoulders B2, B5, extending downward from the head of the jarring machine. f

HG are ledges on the cylinders H on which the frame R, PU, rests inl its lower position; LY, see' F 9, is a stufiing box at the end of cylinder H and 72,2 kis a flange extending outward from the top of plunger H2 and to which the casing R' is attached by bolts tt, as shown. its are bolts securing the head H3 to the plunger `H2. 1

Secured at the corners of the frame are the pulley wheels S, S, etc. and over 'these pulley wheels extend cables two of which, anchored at their upper ends, as indicated at S, ex-

tendv downward, as indicated at S3, under the] pulleys S vat one end of the framing, thence over the pulleys Sv at the other end of the Aframing to an anchorage S4, S5 in dicating a tension adjusting device in these cables.

yTwo other cables attached to the frame SG. ony the other side of the machine, extend..V

downward, as shown, at S7 under the pulleys S on one side and over the pulleys S on the other side to aipoint of` attachment S8, S9A

f. 115 Secured to the ends of theframing by,l

T, T, are the cylinindicating a tension adjustingdevice.

pivot bolts as indicatd at ders T, T', having ports for the admission of pressure fluid as indicated at T2 and T3, T5 'indicating plunger heads in these cylins ders and TG piston or. plunger extensionsy pivotally connectedat their tops as indicated at T7 tothe arms vJ nections as described, are partially ,pro-

tectedby ar sleeve-like extension Rtof the leading from its bottom, to the cylinders H, i

j u of the truninons J'. These oscillating c.yl1nders,and their con.-.r j

U2, indicating a controlled valve. From the upper end of this tank extends the conduit U3 connected with a source of air under pressure and provided with a valve U4. Above this valve is the branch U5 connecting with the port T? of the cylinder T and another branch U6 provided with a control valve U7 and connecting with a port T2.

While, for the construction indicated, a car such as V is most conveniently employed for moving the flasks on to and away from the jarring table, other means can, of course, be employed as, for instance, a crane, and in Fig. 8 1 have indicated a hook, W, which can be attached to a crane chain through an eye indicated at W and which will engage the trunnions Grof a mold through its arm W2, a counterweight W3 being employed to balance the'weight of the hook.

To describe the operation of the machine, the parts as shown in Figs. l and 2 are in the positions they occupy when the roll over plate is resting on the jarring machine and while the jarring operationis performed, the mold having been subjected to the jarring operation, pressure fluid is introduced into the bottom of the cylinders H and the plungers H2 are moved upward, the plungers moving synchronously, owing to their attachment, together through the frames R, R, and the framing being maintained in alignment by the squaring cables passing over the pulleys S and connected, as above described. The plungers H2 in their upward movement carry with them, of course, the trunnions J, J, with their arms K, K, and the attachedlocking heads L, and the locking heads in their upward movement receive in their openings Lt the locking bars E of the roll over plate E which comes to the position in the locking head indicated in dotted lines in Fig. 4. Further upward movement of the plungers H2 lifts the roll over plate from the jarring table and moves it upward.

lVhile the roll over plate is resting on the jarring table and during the first part of the lifting operation, the trunnions and the locking heads attached to the trunnions through the arms K, are held in proper aligned position by the action of the cylinder and plunger T` T5, the valve U7 in the conduit U6 being in position to admit air under pressure from the conduit U3 to the bottom of the cylinder T and the plunger TG pressing the arms J of the trunnions against the stops indicated at I. After the roll over plate has been lifted from the top ot the jarring machine the valve U7 is turned so as to cut off the air under pressure and connect the conduit U6 to exhaust and the port T3 of the cylinder T being' in constant communication through the conduit U5, with the source of air under pressure,

' the lugs E2 this air presses` down the plunger which in turn presses down the arm J of the trunnion to which it is attached, causing the roll over plate to roll over and after the roll over motion has continued through more than air is again admitted to the bottom of the lcylinder T forcing the plunger upward until the trunnion arm J is pressed in contact with the squaring stop indicated at I and this contact is maintained during the drawing of the pattern.

After the pattern is drawn the roll over in the opposite direction is accomplished by a similar manipulation of the valve U7.

As the roll over plate moves from one drawing position, as shown in Fig. 3, to the position it occupies when deposited upon the jarring machine, the lever P comes in contact with the stop Q, and this stop being pivotally attached Athrough the link P4 to the head O and through the hollow extension OG to the head O2 the elect is to draw the locking jaws O and O3 apart to the position shown in'Fig. 4 in which position they clear and the locking bar E so that when the roll over plate is deposited on the jarring machine a further downward movement of the plungers l 2 completely detaches and clears the trunnions and locking heads from the roll over plate. The positive and certain action of the unlocking mechanism is insured in my construction by the application of power through the cylinder T and plunger T6 to press the trunnion arm J again-st the stop I; Itl is, ofcourse, obvious that in the roll over motion of the trunnion from the position shown in Figs. l and 2 to that shown in Fig. 3, the lever P is rapidly carried out of contact with the stop Q at the beginning of the roll over motion so that the locking jaws will promptly engage and hold the roll over plate through its locking bar E and this engagement is maintained until in the reverse roll over movement the lever P again contacts with the stop Q.

At the end of the upward movementof the roll over plate the adjustable stops R3 supported on the cross bars R2 of the frame portion R lcome in contact with the portions B5 of the shockless jarring machines head and lift it to a determined level ywhich should be that of the tracks V so that a car V can readily be run onto the table B2 to receive or carry away a flask.

I have already described the devices by which the locking heads L are adjusted on the arms K attached to the trunnions J and it will, of course, be understood that this adjustment is highly advantageous for adapting the machine to the use of different iiasks in which the center of gravity is at different distances from the surface of the roll over plate. In making the necessary or desirable adjustment of the locking heads it will be obvious that the trunnions should be turned to position in which the arms K are substantially vertical,

As shown in Fig. l and on a larger scale in Fig. 9, a stutling box indicated at h is conveniently used at the top of the cylinder lil and to enable this stumng box to be conveniently got at 'for adjustment, etc. l have 'formed the top of the plunger H2 with an upwardly extending flange 'to the top oi' which the head H3 is attached as by bolts 713 and to the under outer side of which l attach the cylindrical member R ot1 the framing as by means ot bolts h4. This construction, as will he obvious, enables me to readily detach the plunger from the frame member 'R so that when the plunger is moved up ward the stuiting box is conveniently and readily accessible.

Having now descrbed my invention, what l claim as new and desire to secure by Letters Patent, is:

l. ln a roll over jar molding machine ot the trunnion type comprising a arring machine, a roll-over plate and means for raising and lowering the roll-over plate situated on opposite sides ot the jarring machine, the improvement which consists in the combinar tion therewith of roll-over trunnions secured to the raising and lowering mechanism and locking mechanism for attaching and detaching the roll over plate to and from the trunnions.

Q. In a roll over jar molding machine olA the trunnion type comprising a jarring machine, a roll-over plate and means for raising and lowering the roll-over plate situated on opposite sides of the jarring machine, the improvement which consists in the combination therewith ot roll-over trunnions secured to the raising and loiifering mechanism, locking mechanism for attaching and detaching the roll-over plate to and fromvthe trunnions and means for adjusting said locking mechanism to varying distance 'from the trunnion axis.

3. ln a roll over jar molding machine of the trunnion type comprising a jarring machine, a roll-over plate and means for raising and lowering said roll over plate situated on oposite sides of the jarring machine, the combination therewith oit trunnions secured to the movable parts of the raising and loweiing means, actuating levers secured to said trunnions, loc-k holding arms also secured to said trunnions, locking means secured to the said arms adapted to engage and disengage the roll over plate, power means secured to the movable parts of the raising mechanism connected to actuate the operating levers or' the trunnions and stops for holding the trunnions in tiXed positions at thev completion of each oscillation.

4. In a roll over jar molding machine of the trunnion type comprising a arring machine, a roll-over plate and means for raising and lowering said'roll over plate, situated on opposite sides of the jarring machine, the combination therewith of trunnions secured to the movable parts of the raising and lowering means, actuating levers secured to said trunnions, lock holding arms also secured to said trunnions, loclring means adjustable on the said arms adapted to engage and disengage the roll over plate, power means secured to the movable parts of the raising mechanism connectedto actuate the operating levers of the trunnions and stops for holding the trunnions in Xed positions at the completion of each oscillation.

ln a roll over jar molding machine of the trunnion type comprising a jarring machine, a roll over plate and means for raising and lowering said roll over plate situated on oposite sides ot the jarring machine, the combination therewith of trunnions secured to the movable parts ot the raising and low ering mea-ns, actuating levers secured to said trunnions, lock holding arms also secured to said trunnions, locking means secured to the said arms adapted to engage and dis` engage the roll over plate, pivoted actuating cylinders secured to and moving with thc movable parts of the raising mechanism, plungers in said cylinders connectedto the actuating levers of the trunnions and stops for holding the trunnions in lixed position f at the completion of each oscillation.

G. ln a roll over jar molding machine of 'Y the trunnion type the combination of a jarring machine, a roll over plate cylinder and plungers for raising and lowering the roll" over plate situated on oppositev sides of thev jarring machine, trunnions supported on said plungers, locking means for attaching and detaching the roll over plate to and from the trunnions, a framingv connecting the plungers and parallel motion mechanism connected to said framing tor maintaining its alignment during its movements withthe plungers and insuring the synchronoiis movement of said plungers.

7. ln a roll over jar molding machinev of the trunnion type the combination of a jarring machine, a roll over plate, cylinder and plungers for raising and lowering Vthe, roll over plate situated on opposite sides of the j arring machine, trunnions supported on said plungers, locking means for attaching and detaching the roll over plate to and from the trunnions, a framingl connecting the plungers, pulleys secured at the corners of the framing and squaring cables secured to the frame oi the machine and running over said pulleys as described to secure the synchronous movement of the plungers.

8. In a roll over jar molding machine of the trunnion type the combination of a jarring machine, a roll over plate, cylinder and plungers for raising'and lowering the roll over plate situated on opposite sides of the jarring machine, trunnions supported on said plungers, locking means for attaching and detaching the roll over plate to and from the trunnions, a framing connecting the plungers, means attached to the frame for lifting the head of the jarring machine to a definite height when the plungers are in their upper position.

9. In a roll over jar molding machine of the trunnion type, comprising a jarring machine, a roll over plate,l cylinders and plungers for raising and lowering the roll over plate situated on opposite sides of the jarring machine, trunnions and means for taching and detaching said trunnions to and from the roll over plate supported on said plungers, the improved constructive details which consist in providing stuing boxes at the upper end of the cylinders forming the end of the plungers with outwardly extending anges, and combining therewith a framing connecting the plungers consisting of downwardly extending cylindrical members detachably secured to the outer edges of the flanges and transversely extending beams securing the lower ends of the cylindrical members together.

l0. In a roll over jar molding machine of the trunnion type comprising a jarring machine, a roll over plate and means for raising and lowering theroll over plate situated on opposite sides of the jarring machine, the improvement which consists in the combination therewith of roll over trunnions secured to vthe raising and lowering mechanism, power mechanism for rotating the trunnions and holding them in lixed terminal position, locking mechanism for attach ing the roll over plate to the trunnions comprising springs normally holding the locking jaws in operative position and levers for opening said jaws and lock opening stops secured to the movable members of the means for raising and lowering the roll over plate and adapted to engage and operate said levers when the plate is rolled over after the jarring operation and to release said levers on the succeeding roll over of the plate and before it is lowered to position on the jarring machine.

WILFRED LEWIS.

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