US1755704A - Molding machine - Google Patents

Description

3 Sheets-Sheet l April 22,v 1930.

J. T. RAMSDEN MOLDING MACHINE Filed Nov,

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April 22, 1930. J. T. RAMSDEN 1,755,704

' -MOLDING MACHINE Filed Nov'. 5, 1927 s sheets-sheet 2 /A/l/E/VTOR (fo/9 Ramadan April 22, 1930. J. T. RAMSDEN 1,755,1104

MOLDING MACHINE I Filed Nov. 5, 1927 3 Sheets-Sheet 3 fai/6.3.

(/0/412 ams/ezz Patented Apr. 22, 1930 i UME?` STAT JOHNI T. RAMSDEN, or rmL'AnnLri-TTA, PnNNsYLvANiA, nssieNon `To THE TABoB.

MANUFACTURING vcoivrrANv;` orl PHIL TIoN or PENNSYLVANIA Application filed `1\Toveni`ber The present -invention relates to improvements inmolding machinesand more particularly to hand ramming-rollover-pattern drawing molding machines for core making and 5 for use generally.

' The principal'object of the-'present inventionis lto provide amachine of the type recitedwhich can be easily andsucces'sfully operated with the employment of very little labor. l

Other objects of the invention will appear from the following description and'it may be said that a rollover machine of the invention is characterized by a construction in which the pattern drawing mechanism is carried by and aligned withrthe rollover table or frame and in which the leveling device is a provision of the clamp which is carried by the table or frame and in which there are other features of inventionl that will be hereinafter set forth, and at the end of this description the invention will be claimed.

In the following description reference will be made to the accompanying drawings form-f 2.5i ing part hereof and in which there is illustrated one embodiment of the invention chosen from other embodiments and in z which u Figure lis a side elevation partly insection of a machine embodying features ofthe in- Y BD vention and in this figure the clamping head is shown as turned from a position, perpendicular to the plane of the paper, which itr would normally occupy into a position, in the plane of the paper, which is its working posii tion, for the sake of clearness.

Fig. 2 is `an end view Vlooking from left to right in Fig. 1 with a part of a counterweight i indicated by dotted lines for the sake of a better illustration of the parts that liebehind l 45.' These-parts constitute a type of supporting ADELPHIA, rENNsYLvANIA, A` oonronaf MoLnTNG MACHINE 5, 1927. seriaiNo. 231.3035

structure. Hinged to the top of the'columnf isa swinging frame generally indicated :at 5. As shown this hinged 'connection' is provided by a shaft 6 arranged in the bearing 3l and connected at its ends with vthe hinged frame. r.lhe hinged frame includes a table 7shown as provided with slots 8 useful for thepurpose of holding to the table any yform of core y boxes, patternplates, and the like and alsow shown as provided with a handle v9.l 1() indicates supports upon which the free end of the frame 5 rests when theV machine is in yramming position. The frame 5 is provided.

balancing effect of the spring to the weight of the core boX or pattern plate. One way of* doingthis is by attaching the end of the spring to a pin 13r working in a slot in the arm 11 and connected with anut 14 mounted for endwise movement on a screw lrevolubly mounted in the arm-11 andhaving a finger ywheel 16. j The frame 5 is provided with ak sleeve bearing 17 and with earslS, Fig.1,-

together constituting a holder aligned with the'bearing 17. Mounted in the sleeve 17 for endwise sliding movement is the rod 18 of` the clamping head generally indicatedat19.-

The arm 20 of this head is turnably, but'endwise immovably, mounted on the rod 18, forV example by means of collars 21 and 22. Theiy arm 2O is Aprovidedr with a disk 23 around Vwhich passes la spring-24.- having oneof its ends connected with a snail 25, land the, other of its ends provided with a chain 26-of which,r the links are adjustablysecured between the vfingers 27 The snail 25 is fast on the collar 22 or otherwise secured vto the rod 18. Thev purpose of the spring 24C is to solicit or tend to turnthe arm 20 clockwise'in Fig. 3'.. Atl

' the end of the arm 2O there is mounted a cylindrical element 28 of the ball joint 29, and the element 28 is adjustable by the clamping screw 30 toward and away from the table 7 to accommodate lasks or core boXes of different heights. The other element of the ball joint 29 is a three-armed flask clamp 31 connected with the element 28 Aby means of a spring pressed bolt 32. The provisions at the end of the arm 19 constitute both a clamp and a leveling device as will hereinafter more fully appear. There is fast on the rod 18 a bracket 33having a swivel 34 The bracket 33 is provided with an eye or opening 35 throughwhich the'guide rod 36 is slidable,

and the guide rod 36 is held fast in the hold! ers 18. 37 is a crank handle fulcrumed at 38 Vto the frame 5. Pivotally connected to this crank handle at 39, Fig. 2, is the curved portion 40 of a link that includes a rod eX- tension 41 provided .with centering springs 42 which cooperate with the bracket 33 as an abutment. Vv43 .is Va counterweight swinging on the fulcrum 38 and turnably connected Y with the pin 39 carried by the handle or hand crank' 37.

Asillustrated in the accompanyingV drawings the machine is arranged for use as a core making machine and in describing the mode of operation reference will be made to the use of the machine for making cores but it will be readily understood that the inven- Yis lguided in a rectilinear pathv downward tion is applicable in molding generally.

The cavities in the core box a secured to 24 is a means Jordoing this automatically.l

When Vthe box a has been jar rammed as described itis struck off and the core plate I) issput into position and the leveling device is turned into the position sho-wnin Fig. 3 over the core plate b. Then the operator lturns the hand cra-nk 37 in the directionrin-` dicated by the arrow in Fig. `2 with the result that the rod 18 of the clamping head slides toward the bearing 17 and the guide rod 36 enters the eye 44, `so that the arm 20 is held againstrotary motion and the clamping head and the leveling device 31 comes into contact with the core plate. The spring transmission mechanism 42 permits further movement of the handle 37at the same time clamping the core plate and core box untilthe handle 37 has been turned approximately 190-into contact with thestop 45 which is al position of rest. During the described turning movement of l the handle 37 the counterweight 43 has been turned upward lready for action.-l The operator then turns the frame 5 or rolls it Vover aboutthe pivot 6 being assisted by the counterbalance spring `12 and of course the frame carries with it the core box and core plate and the combined leveling device and clamp. .The frame comes to rest on the stop 4. The operator then turns the hand crank 37 in the opposite direction with the result that the core bcX is lifted from the core plate which remains on the leveling device 31 and with the result that the eye 44 clears the rod 36, so that the leveling device 31 and the arm 2O which carries it are turned out to the side of the machine and the core plate can be removed conveniently. 'lhe spring'24 is one means for turning the arm 2O in the manner described. The stops 46 and 47 limit the movement of the arm 20, and the stop 47 properly positions it for aligning the eye 44 with the rod 36. It is perhaps unnecessary to state that in drawing the pattern use may tothe frame 5.Y

The handle 37 may not befturned in the directionindicated by the arrow in Fig. V2 unless the head 19 isV properly positioned over the. flask or mold, as shown in Fig. 3. rlhe reason for this is that if the arm 20 be turned clockwise in Fig. 3, the stop 46 engages the handle 37 andprevents its movement in the direction of the arrow in Fig. 2. Movement of the handle 37 obviously controls the action ofthe spring 24 by means of the interengagement of rod 36 and eye 44. In addition to the adjustment 30 for the accommodation of lasks or bornesv of dierent depths the spring-transmission 42 is effective. VIncidentally it may be said that the part 48 is a counterweight, 47 is a pin acting as a stop for aligning the eye 44 with the guide rod 36. Y

It will be obvious to those skilled in the art to which the invention relates that modiiications maybe made in details of construction and arrangement and matters of mere form without departing from the spirit of theinvention which is not limited to such matters or otherwise than the prior art and the appended claims'may require.

I claim:

1. Amolding machine comprising a column provided with stops, a rollover frame at the top of the column and adapted to rest on the stops in pattern drawing position and to be turned into mold making position, a clamping head provided with a leveling device and slidably mounted in the frame, an operating'han'dle carried by the framej and mechanism between the handle and head for shifting. the latter in. respect to the frame to clamp and to pattern draw.

, 2. A molding machine comprising a rollover tra-me, a clamping head provided with j a levelingV device and movable' inrespect to be made as is customary ofa vibrator applied the frame, and spring transmission mechanism between the handle' and head for shifting the latter in respect to the trame to clamp and to pattern draw. i

3. A molding machine'y comprising fa col-` umn provided with stops, a rollover vframe turnable on the column and adapted toy rest on the stops in pattern drawingposition and to be turned into mold rmaking position, a clamping head provided with 'a turnable vleveling device andslidably connected with ythe frame, an operating handle carried by the frame, transmission mechanism between the handle and Vhead for shifting the head in respect to the. frameto clamp and to pattern draw, and a guide rod fast on the frame and a cooperating eye on the head. v

4C. In a molding machine a rollover frame,-

a clamping head slidably carried 'by the frame and including a turnable arm, spring means constructed and arranged to turn the arm, a guide element carried by thel frame to move the head and to disengage and reengage the clamping means.

Y. In a molding machine a rollover frame, a head mounted to roll over with the frame and afforded motion in respect thereto, a

leveling ydevice having universal motion means connecting it with the head whereby it is automatically. adjusted in the act of clamping by movement of the head, and means for moving the head in respect to the frame.

JOHN T. RAMSDEN.`

and constructed and arranged to insure alignment of the head and :trame and to oppose turning movementof the arm at lintermediate positions of the head, and operating means for shifting the head in respect to the frame.

5. In a molding machine a rollover. frame, a head mounted to roll over with the frame and afforded turning motion in a generally horizontal plane, spring means tending to turn the head in such plane, guide means carried by the rollover frame and interposed between the head and frame for affording rectilinear motion of the former in respect to the latter for clamping and pattern draw ing and to release the head for automatic turning motion in a horizontal plane, a leveling device having universal motion means connecting it with the head whereby it is automatically adjusted in the act of clamp'- ing, and a handle turnably connected with the frame and having spring mechanism n adapted to move thevhead toward the frame for clamping and leveling and itself adapted to turn with the fra-me and then by reverse movement to separate the head from the frame for pattern'drawing'and for disengagement of the guide means to permit the head to swing out laterally from under the frame.

6. AIn a molding machine a rollover frame, a head mounted to roll over with the frame and aorded turningrmotion inV a generally horizontal plane, spring means tending to l turn the headin such plane, guide means car'- ried by the rollover framerand interposed between the head and frame for affording Y rectilinear motion of the former inrespect to the latter for clamping and pattern drawing and to release thechead4 for automatic Y turning motionvin a horizontal plane, andv f means connected with the frame `and adapted

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