US1794556A - Molding machine - Google Patents

Description

March 3, 1931.

w. E. sKlDMoRE MoLDING MACHINE O s sheets-sheet 1 u :l l r .L

W. E. SKDMORE MOLDING MACHINE March, 1931.

Filed'Oct. 13. 1928 3 Sheets-Sheet 3 gwntoz WIE S 07m afg I dbbomq Patented Maas, iesi WALTER E. sirinivionn, or nase iii'vniaroon, oiiio MOLDING- MASSH'INE' fnppneaucii ined eetote ia, 192s. seriai no. 312,323."

" This invention relates to improvements in molding machines and constitutes anl rini` provement upony my former Patent No. 1,262,276.v f Y Y The present mold is designed l'iarticularly foruse in the formingof insulators and lhas for its particular object topprovide a machine of 'greater efficiency than my former inachine,` and vin which Lanimproved ineans'is employe-d for operatiiig'theside mold toggle arinsby means of which the same can be swung through greater arcs for the performance of their rvarious operating movements, l Another yobjectof thel present invention is to provide a machine of the above described character ydesigned tofbe operated byme'- chanical power,` making use of a new and novel means for vertically reciprocating the plunger of the machine. Y j

A still further object ofthe invention is to providek a molding machine of the above describedcharacter wherein is lemployed a? novel type of molded article vextracting mechanism'designed to operate immediately fol? lowing the rseparation of side 1dies to strip i the article from the centerl or core die.

f The `invention will Ibe best understoodfroin a consideration ofthe following detailed de# scription taken in connectionwith the accompanying drawings forming part of 'this speci-Y fication, with the understanding, Vhowever, that the invention is not confined to-any strict conformity with the showing ofthe drawings but may be changed or modified so long as such changes or modifications niark no material departure from the salient-'features ofy the invention as expressed in the appended claims. I 'In the drawings A Figure 1 is a front elevation of the device embodying the present invention; Figure 2 is a` side elevation of the same, partly broken away; l Y

Figure 3 is a verticalv sectional view showing the mold elements and thev mechanisi for removing the molded article g Y Figure tA is 'a' horizontal sectional `view Von the line Ji-+4 of Figure 1; f Figure 5 is a horizontal sectional viewI on the line '5;5 of Figure 1 ;A 1

eefcentricpin 16 which connects with a hori- VFigure6 is afvertical sectionalview on the line 6 6 of Figure '5; 1

Figure 'I' is a sectional view taken on the line 'Z-,Tof Figure Il.` Y

Referring more particularly to the drawings ,='the numerals 1 indicate ay pair of up# right side beams of the frame of the present 'inold these beams being mounted in a suitableinanner upon the base 2 and connected at their upper ends by a plungerguide beam 3 and at a point intermediate their ends and adjacent the beam'i, by asecond or `brace beams'. The central portion of the beam 3 has-fa recessformedtherethrough as indicatedat 5, this recess being` normally covered 65 by a plate which acts to maintain a plunger, hereinafter described in upright position. Y

Adjacent their'lower ends, the side membersfl of the frame are connected by a charge receiving receptacle supporting beam or platform 7` in the central portion of Awhich `is mounted the charge receiving receptacle 8,

k'Atthe rear 'of Veachv of `the frame members 1,'thereis located an upright beam 9, 'these beams being mounted upon the base 2 and connected at their upper ends `tothemembers 1 by the horizontal pieces 10. Themenlbers flare also connectedA together by an upper beam 11 and an intermediate beam 12, the ybeam12 being designed tosupport a `drive shaft 13, upon the outer end of whicha suitablepulley '14 is mounted.

.At its forward end the shaft 13 is rotatablyfinountedin a suitable bearing formed in an upright plate` 15, which plate isvlocated s' midway between the side members 1, resting at itslowei' end upon the base 2 audits upper end being connected lo the receptacle supporting beam 7 in `the manner shown.

Apinion 16 is Vmounted upon the forward end of the 4shaft 13. which meshes with a gear 17 suitably rotatably lmounted upon the plate 15,- this gear being providedv with an Zontal lower drive beam 19. lfis-shown this drive'beain 19 extends transversely of the machine frame.;A having its ends extended through vertical slots 2O formed in the lower portions of the members 1.

The-outer ends of the lower drive beam are f 0 horizontal upper drive beam 22,

connected by adjustable drive links 21 with similarly projecting ends of a substantially this upper drive beam extending transversely of the machine frame and having its ends extending through long guide slots 23 formed longitudinally through the side members and extending through a substantial length ot their upper ends. The outer ends of the beam22 are provided with a series ot apertures 24 so thatadjustment ot' the upper ends of the links 21 may be made longitudinally thereof.

Connected intermediate its ends to the upper drive beam 22 at the center thereof is a vertically arranged reciprocable plunger 25 which extends downwardly through the recess 5 in which it is held by the plate G. As shown this plunger, adjacent its lower end, has Jformed therethrough a longitudinally extending slot 2G", the lower portion ot. which slot opens into a longitudinally extending hoi-e 27, the lower portion ot which bore is enlarged as indicated at 2S and opens through the lower end of the plunger. As is shown in Figure 3 the lower end ot this bore is threaded.

The bore 27 has positioned therein an ejector pin member 29 which extends downwardly therethrough projecting beyond the lower portion ot the plunger and extending into a longitudinally extending bore 30 formed in a central die member 31. rllhis core die me1n ber 31 as shown has threaded connection in the lower end of the enlarged portion 28 of the bore and the wall of the die is provided with the diametrically oppositely positioned longitudinally extending slots 32 in which reciprocates the ends of a transverse pin 33 which is carried bythe Vlower end of the ejector pin 29. The pin 29 also carries a disk 34 which snugly slidably positions in the enlarged portion 28 of the bore 27 limiting the upward movement of the pin and acting as an abutment for the upper end of a coiled spring 35 encircling the pin'therebeneath and resting upon the upper end of the center or core die 31 in the manner shown. A

Surrounding the die 31 is an ejector sleeve 36 with the upper end o which the ends of the pin 33 connect Vso that movement of the pin 33 will cause the sleeve 36 to slide upon the center die 31.

Positioned in the recess 26 of the plunger is a roller member 37 having a shaft 38 eX- tending therethrough and each end of this shatt has sliding pivotal connection in an arcuate slot 33 formed through each of a pair of crossed toggle links 39, the .connection being made adjacent the lower ends of the links as Shown in Figure 1. rllhe upper ends of these links connect with roller members 40 while the lower ends thereot pivotally connect as at 41 with the lower ends or?l die carrying links 42 these links 42 being located which co-operates with the central die 31 to form the product for which the machine is constructed.

- Adjustably secured tothe inner face of each side member 1 adjacent the brace beam 4 is a block 45 over the inner tace of which the rollers 40 of the adjacent pair of toggle links 39 passes during the operation of the machine. These'bloeks are secured in adjusted position by bolts 46 which pass therethrough and through the slots 23 in the supporting frame member being held to the frame member by tightening a nut upon the outer end of the bolt to bind the block against the frame infthe manner shown. Arranged against the inner face ot' each side member 1 adjacent and to overlie the stationary die supporting beam 7 is a -lower block 47, each of these blocks carrying bolts 48 which pass therethrough and through the lower ends of slots 23, the block being bound to the frame in the same manner in which the blocks 45 are secured thereto, that is by the application of a suitable nut upon the outer end of the bolt to. draw the bolt and block into position.

The block members 47 coaeL with rollers 49 mounted upon and projecting laterally from the lower ends of the die links 42 to maintain the die halves 44 tightly together about the core 31 when a molded body is being formed.

In operating the present machine, the receptacle 8 which is formed to snugly receive the center die 31 and side dies 44-when they have been brought to position thereabout, is charged with a suitable amount of plastic inaterial to be molded such as clay or the like and upon application of suitable driving power to the gear 17 the drive beams 19 and 22 will be drawn downwardly, thus bringing the plunger 25 down and causing the center and outside dies to enter the material contained in the receptacle 8. During the irst part of this downward movement the rollers 40 of the toggle links will move inwardly and down the faces of their respective blocks 45, thus operating the toggle links 39 to swing the side dies 44 together, causing them to encase the central die 31.

As the dies move into position in the receptacle 8, the plastic material therein is 'forced upwardly into the space between the side diesand the central die.l The side dies 44 are caused to press firmly together by the passing of the rollersk 49 which are carried upon the lower ends of the die links 42 over the inner faces of the lower blocks 47. `During the downward movement of; the plunger and while the same is at its lowermostrpoint, the

lifter the insulator `body hasbeen `formed,

w or inotherv words, after the pin 18 has swung beyond its llowermost position on the drive gear `1,7 ,z the reverse or upward movement of the beams 19 and 22 is begun;

This upward movement. first causes a release of the pressure'ofthe side dies44 against the material interposed .between them and the center die 31by` the movement of the rollers 49 ofi of the inner faces of the blocks 4T.'k

Further'upward lmovement of. thel beams and of the links 42 brings the rollers 40 of the toggle links to position where they caninove laterally overthe tops ot the blocks 45, their -further upward and lateral movementbeing stopped by `thebrace :beam 4. and the side members 1 against which they abut. 'This operation causes the lower.` ends of the toggle links to' swing apart in the .manner shown. As clearly shown in Figure 1 when the links have reached the'positions above described, that is the position Where the side dies are entirely free of the insulator carried upon lthe coredie 3, the pivotal connection 18 between the gear .17 and the beam 19 will not have reached the limit otits movement upward. The continued rotation of the gear 17 forces the plunger 25l upwardly thus bringing the upper end ofthe ejector pin 29 against-the roller 37 forcing it, andthe sleeve 36, downywardly, the sleeve sliding on the core die to push oil' Athe formed insulator.

It is of course, clear that owing to the fact that the links39 cannot nieve furtherA laterally at their upper ends, in order to permit their lower ends to shift in order to allow the attached links 42 to move with the plunger 25, the arcuate slots 38 are provided.r It will be readily seen that as an-upward pullis exerted upon the' links 42 their lower ends will be swiingfurther apart because of the pivotal connection lat 41 with the links 39 and theslots 38 are provided to permit the links 39 to havel sufficient swinging movement to permit this action.

In order to maintain the plunger 251in the proper position an adjusting means is provided which comprises four screws cach of which vis indicated by the numeral 50. These screws' are# threaded through supporting blocks bl' located. Iadjacent each corner or" the plui `er'257as shown in Figure4 and cach cari' e-s upon its forward end the swivel head termed to receive the adjacent corner of the-plunger. '.As will bey readily seen upon' i referring to Figure 4the four screws 50 may be' adjusted so vthat the plunger-25 will be held in the `proper position for vertical reciproeation.v f' 1 f In-orderito-.makethe operating action or" the upperv ends of the links 39more positive there'isprovided a spring ftor attachment at 'one end to the upper ends of these links,l Y

each ol the springs being extended through thefadjaceiit recess; or slot ltothe outside oi'" the; frame where it is attached to the ad-- jacent bolt 4G. 'lt'. will'zbe se'eiithat when the linksyllare ,drawn together tlief springs 3 i'S-'i-'llbe placedunde'r tensioinand will op, e 'ateatoi make tlieretiirn ofl-the-links, posi- -Fronrithe foregoing. description, itwill bereadily understood that theinacliine here iiidescri-bed constitutes .a simple and efficient means for rapidly forming insulators and other pressed articles or' ,this character, the

machinebeing of strong'and rugged construe`` suk tion and,comparatively, inexpensive to set up,

and operate. v laving thus described my invention, what claimisrv .s

fr molding machine ofthe characterdescribed,,comprisiiiga receptacle, a vertically reciprocableplunger, a center mold carried .by said plunger, side molds arranged upon opposite sides of the center mold, said center mold and sidemolds being designedto enter the receptacle, crossed toggle, arms vpivotallyl connected intermediate their ends each controlling at its lower ,end one of .said side molds and having its. yother end free, roller members carriedcupon the tree ends of lthe toggle arms, and guide elements adjustably mounted at opposite sidesot the plunger for. governing the movements ofthe roller carry? ing ends ot the toggle arms. A

2. A molding machine of the character described, comprisiiig aI receptacle, a vei ally reciprocable plunger,v a `center mold ca ried by said plunger, sidemoldsarranged `upon opposite sides oft the center mold, said center mold and side molds being designed to enter the receptacle, crossed toggle arms pivotally connected intermediate their ends each controlling at its lower end oneoi saidside molds andhaving it-s ,other end free, roller members carried yupon the free. ends `of the toggle arms, guide elements adj ustably moiiiitedfat opposite sides oi. the plunger for governing the .movements of the roller carry! ing ends ofthe ,toggle arms, and meanscontrolled by thetoggle arms at a cert-ain period in the operation of the; inufhineier eject-ing amolded ai'ticlefrom said center mold. l

3. A mold machine oi? the character described, `cominjising a trame including a pair A beam inr alinement with saidreceptacle, a'l

center mold carried by saidbeain, means -ior supporting a pair of side molds at opposite sides of said center mold,- crossed pivotally connected .toggle arms each connected atits lower ends with a side mold, and means for controlling relative movement of said toggle arms during the. operation of the machine for separating or bringing together said side molds about the center mold.

4. A mold machine of the character described,comprising a frame including a pair of spaced upright side members, a material receptacle arranged between said side inembers, a transversely extending vertically reciprocable operating beam carried by the side members, al vertically mounted plunger carried by said beam in alinement with said receptacle, a center mold carried by said beam, means for supporting a pair of side molds at opposite sides of said center mold, crossed pivotally connected toggle arm-s each v connected at its lower ends with the side mold, means for controlling relative movement of said toggle arms during the operation of the machine for separating or bringing together said side molds about the center mold, and means for adjusting said last mentioned means for increasing or decreasing the time period ot operation of the toggle arms.

5. A inold machine of the character described, comprising a frame including a pair of spaced upright side members, a. material receptacle arranged between said side members, a transversely extending vertically reciprocable operating beam carried by the side members, a vertically mounted plunger carried by said beam in alineinent with said receptacle, a center mold carried by said beam, means for supporting a pair of side molds at opposite sides of said center mold, crossed pivotally connect-ed toggle arms each connected at its lower ends with the side mold, means for controlling relative movement of said toggle arms during the operation of the machine forseparating or bringing together said side molds about the center mold, means associate-d with said plunger for removing a formed article from the center mold after the same has been extracted from the stationary mold, and means carried by the toggle arms V for operating the article removing means.

6. A mold of the character described, coinprising a receptacle, a vertically reciprocable plunger arranged over said receptacle, a central. die carried at the lower end of Y said plunger, means for reciprocating said plunger, depending link members carried by said means at opposite sides of the plungerha pair of side dies each carried by one ot said links, said dies being designed to close about the central die, crossed toggle arms pivota-lly connected intermediate their ends and having the pivotal connection extending through a longitudinal sl'ot in the plunger, said toggles each being pivotally connected at its lower end to one ot said links, means acting upon the other end s of the toggle arms for causing relative movement therebetween during the operation of the plunger, and mea-ns actuated` by the toggle arms for causing the stripping of a. formed article from said central die when the side dies are in open posit-ion.

7 A molding machine having a vertically reciprocable plunger carrying a center die at its lower end and having a pair of laterally shiftable side dies arranged on opposite sides of the central die and means for stripping a formed article from the center die after the saine has been formed thereaboiit between the side dies and in a receptaclecomprising a sleeve surrounding the central die inwardly of the position .occupied thereon by a molded article, a reciprocating pin operating within a central passage formed inthe plunger and extending into the central die, lateral pins carried by the first-mentioned pin extending through longitudinal slots in the centraly die for engagement with said sleeve, the upper end of the iirst-mentioned pin projecting into a slot formed loiigitudinally through the plunger, resilient means normally retaining the first-mentioned pin in retractedV position, a pair of toggle arms crossed intermediate their ends and each having connection with one of said side dies, a pivot pin extending through the toggle arms and through said plunger slot for engagement with the first-mentioned pin, and means for causing relative movement between the toggle arms during the operation of the machine for operatingthe ejector mechanism.

8. A mold of the character described, comprising a frame including a pair of upright side members each having longitudinally extending slots therethrough adjacent the upper and lower ends thereof, transversely extending upper and lower power beams having their ends extending through adjacent ones of said slots, adjustable connecting links between the adjacent ends of the beams, a plunger carried by the upper beam, depending link members carried by the upper beam at opposite sides of the plunger, a die unit co-operating with a material receptacle and including a central die member carried by said plunger and side die members arranged on opposite sides of the central member and carried by said links, toggle arms crossed intermediate their ends and having pivotal sliding connection with said plunger, the lower ends of said toggle arms being pivotallyvconnected to adjacent links, means acting upon the other ends of the toggle arms during the operation of the machine for causing relative movement therebetween, and driving means connected to the lower ones of said power beams for raising and lowering the same.

9. A molding machine of the character described comprising a receptacle, a plunger, a center mold carried by said plunger, side molds arranged upon opposite sides of the center mold, said centermold and side molds being designed to enter the receptacle, crossed togg1e' arms pivot-ally connected intermediate their ends each controlling. at its lower end one of said side molds and having its otherV l endfree, and guide elements mounted at opposite sides of the plunger for governing the movements of the free ends of the toggle arms.

10. A .molding machine of the character described Comprising a receptacle, a plunger,

a center mold carried by Said plunger, side Y molds arranged upon opposite sides of the center mold, said Center mold and side molds `being designedto enter the receptacle, crossed toggle arms pivotally connected intermediate their ends each controlling at its lower end onevof said side molds and having its other end free, guide elements mounted at opposite sides of the vplunger for governing the movements of the free ends ofthe toggle arms, and means operated by said arms at a. predetermined period of theirmovement for stripping a molded article from the -oenvterl mold.

In testimony whereof I hereunto affix my signature.

' WALTER E'. SKIDMORE.

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