US1581773A - Apparatus for molding - Google Patents

Description

April 20 1926. 1,581,773'

F. E. WILLIAMS APPARATUS FOR MOLDIN G Filed April 2, 1924 2 Sheets-Sheet l April 205 1926.

F. E. WILLIAMS APPARATUS FOR MOLDING Filed April 26, 1924 2 Sheets-Sheet 2 La .w um W VW v6 Patented Apr. 50, 1925i..- I

NETE@ ersten.;

AIPFARATUS FDE MGLDIN C1".

application tiled April 2G, 12124. Serial No. 769,295.

for li/iolding, of which the following is a specificationl This invention has to do with the art of molding; and relates more specifically to anI apparatus for expediting the solidiiication of castings from their fluid state, and, also, for producing hollow castings in novel warmer by reason of such rapid selidilication. 4rihe invention is especially appli able to the production of castings from paraftlin or other material having similiar properties.

In the accompanyingdrawings forming part of this specilieatieinin whiehlile numbers of reference denote like parts wherever they occur,

Figure 1 is a perspective view of the preferred form of this apparatus;

Figure 2 is a transverse vertical sectional 'iew through the mold of this preferred form;

Figure 3 is a transverse view of a modified ferm of mold; i

Figure i is a vertical longitudinal central sectional view through the inoldof Figure 1; y i

Figure 5 is a perspective view of another type of mold embodying the features of this invention, a vertical longitudinal central section being shown through the same; Figure 6 is a plan view of still another form of mold, parts being shownin section on the linee-6 of Figure 8;

Figure 7 is an elevation of the saine,`

irregular hue 7 7 partly in section `on the ot Figure G;

Figure 8 is a transverse sectional view.

on the line 8*8 of Figure 6; and

Figure 9 is a similar view, but with mold shown in open position. Y Y

Referring to the form of this invention depleted in Figures 1, 2, and il, a supporting frame comprises bottoni member or floor 1, having a pit or recess 2 at its rear end, and uprights 3 and 4- at either side. l.- shaped flanges 5 and project outwardly from. the respective upriglits 3 and il near their tops 7, so as to forni chainiels 8, extending from the front to the rear of the frame;

neem

the

9 rest slidabiv in `slidably in the'holes 23 nels 8, and have journaled therein the pipes i or hollow shafts 10,*the inner ends of which Y screw into eross-'tittings11, the. inner ends et which cross-fittings 11 have screwed there` into the nipples 12, the inner ends of which nipples 12 are screwed into the respective ends of the middle, hollow mold member or blocl 13.l l

ylilolding block 13 has secured tothe bottom thereof, and near each of its ends, by means of screws 14, A15, terminating at suitable distances beyend the sides 16of the block 13 in upright brackets 17 which support rods 18 passing through holes 19 in the said brackets, and which rods are threaded at their ends for the recepcion of nuts 20, which nuts are screwed home against the outer faces 21 of the brackets 17, thus securing rods 18 in place. Rods 18 pass through the middle molding block y'18, andthe outer hollow mold. ing blocks 22, arranged one on each side of middle block 13, the said rods fitting of the said blocks. Outer blocks 22 are thus slidable toward and away from the middle bleek 13, the said blocks coloperating to form the parts of a mold, which is open when the blocks are separated, and'closed when they are together, the innersides 24 of the outer blocks 22 ce operating with the respective outer sides 25 of the middle block 18 to form the parting faces of the mold, ing the configuration of the articles to ,be

molded being partly in the sides 241: of blocks i 22 andzpartly in the sides 25 of block 18. Blocks-13 and 22 are preferably formed of aluminum' alloy, or seine othergood heatconducting materials.

Nipples 27 are screwed into the ends ot `the blocks 22,l and L-fittings 28 are screwed the nipples 27, and a. resilient hook 32 at' the other end which engages the other nipple 27 on the opposite outer blocklVheu the mold occupies theposition at the forward end of the supliorting frame, as shown in Figure 1l it cannot be inverted or tilted by reason of the, stpjpping iianges 38 i1 t' g with. or bloc lng the swlnglof ugs 28 and li, ses The stepping' the transverse beams` the cavities 26, hav-` flanges 33 extend only alongwthe forward portions of theA uprights 3 and 4, so that when the mold has been nearly moved. toward the reai' of theframe, flange 33, by

reason of its termination atl 34 no longerV the system, including the cavities 38 in the.

blocks 13 and 22and the several pipe and hose connections hereinbefore described, by any suitable means, such as a pump.

A. frame 39, in the present instance of rectangular shape, isplaced on top.- of =the mold (which is in the lposition indicated in Figure 1) preparatory to pouring the paraffin. Av predetermined quantityy of moltenl parailin isthen dished out ofthe pit 2 in a suitable receptacle in the hands of 'the operator, and poured -into the space enclosed by the frame 39, from whence itiiows into the cavities 26. The metal walls of ithelcavities.

26, being cooled by the circulating refrigerf ant, congeal that portion ofthe paraflin. in immediate contact therewith,,forming a hollow shell of solid paraffin containing a core of warmer and still molten para-Hin. Before the. molten pourflias ,.hadtime to congeal the frame39 is removedand the moldfis pushed almost to the-,rear-of thexsupporting frame, wher-cit, is free to turn, andV is ther.

inverted Vthe molten paraffin flowing out and returning into the reservoir or pit7-2 to the source of molten paraffin supply'. The mold is then againturned top-side up, and pushed further back so that fthe nipple 27 engages slot'35, thereby preventing accidental turning of the mold. The solidified gate .or sur-r plusofparaflin remaining on topof `the mold is severed from vthe individualcastings. by

passing a knife along the top of the mold, and the. severed-:portioni is returned to the pit 2..l The mold is now moved retracted slightly to turning position, againinverted, and thenfurther` retractedto its forward position, whereupon latch'30 is disengaged, andthe blocks 22 `moved away from the block 13, the castings40 thereupon being released and falling'on the floor1 or on any other suit-able receiver placed thereon. Blocks `22 are now agai-n returned rto their normal position against the block 13, the latch 30 again swung to` locking position,

the mold moved-backto turning position,l

tui-ned top-side up, and theny inally moved forward .toy its original Vpostion as shown in Figure 1, when the foregoing cycle of operations may be repeated to malte another batch of cast-ings.

A 4non-refrigerated`mold would soonv become too warm `by continuous use, so that. the

time required for the castings to congeal would be undulyfprolonged. besides expevdit-ing the production of cast-ings, by

maintaining the. mold at a ten'iperature requisite therefor, by means of refrigeration,

the mold of the present invention enables the production of hollow castings without the use of 'a core, because of the resultant congelation of the shell of the casting in advance of its internal portion. Moreover, the v continuous production of castings is further materially facilitated by reason of the pivoting of the moldin `the blocks 9, and the reciprocation of the .said blocks in the channels S, as well as by the'ease with which the mold may be repeatedlyopened and`r closed by reason of the sliding of its outer blocks 22 on the guide rods 1S, in connection with V'the use of the latch 30.

It isnot necessary thatthe cavities 26 be directly in the blocks 13v and 22, but the cavities-26 may be formed in matrix plates 41 attached to the side or sides, as the case may be, of the blocks 13 and 22, by screws 42, as shown in Figure 3.

Figure 5 shows 4an alternative form ofy open mold,in which thematrix plates 43 are secured to the top and vbottom faces respectively o-f the mold 44, by means of the screws 45. In molds of this type, it is desirable to cool both top and bottom simulta.

neouslyand uniformly. In practice, how.

ever, thatfportion Vof the mold l'chamber or cavity 46 above the nipples 12 forms an airpocliet, which prevents the refrigerant from reaching and cooling directly \\'liicl'iever side of: themold,y for the time being, is on top.v .The result of this conditionwisythatthe op*- positely disposed -matricesy are alternately heated and cooled with every vinversion or half 'turn of the mold. To compelthe currentl of brine t-o circulate through the mold alternately from top to bottom ina zigzag course, a series of transverse baii'le' plates 47 are preferably provided therefor. The baffle plates 47 project alternately from thetop and bottom sides ofthe cavity 4G to, preferably, about half-way. across the cavity 46. vent-the air from thechamber 46 to prevent the formation of anair pocket, the valve 48 is provided vat one end of the mold, being threaded into opening 49, leading into the chamber 46 adjacent its upper wall;A Ports 50 in the topof the baille plates 47 similarly vent the air between the plates. These improvements for uniformlycooling both sides ofthe mold are not necessarily restricted. in their use to the form of .mold depicted in Figure `5, but may be adapted to various ToA tlf)

Cil

kinds of molds, including the form shown in Figures l to l inclusive.

Figures 6, 7, S, and 9 depict a form of kmold especially suitable for casting bottles and similarly shaped objects. rlhe mold comprises 2 sections or blocks 51 and 52, which are hinged together at 53 to permit of closing them upon one another. The cavity or passage for the circulating refrigerant of block 5l divided into 3 branches 54, 55,

and 56, which contain the baille plates 57,

having air vent ports 58. To vent the air from the several cavities through the endV tains cavities for casting bottles, and part 52 contains cavities 66 for casting the lids or covers for the bottles. Cavities 65 are in staggered relation to cavities 66, so that each part forms a cover for the cavities of the other part. Part 52 is cooled by contact with part 5l. The castings 67 and 68 may be removed by opening the mold, as shown in Figure 9, and applying to the face of the. mold a cup G9, which receives compressed air thro-ugh a tube leading thereto. Or the cup 69 may be formed of materia-l such as rubber, and a solid handle thereon in lieu ofa tube may be operated manually to compress the air already in thecup, and thereby force out the castings.

The baiiie plates used in the several molds not only forcethe circulating brine to pass from the bottom to the top and vice versa, but they also presentan additional metal surface to impart heat to the refrigerant, and thereby increase the available cooling surface.

Figure '10 depicts a modification of the form of mold shown in Figures' to 9 in? elusive. lust-cad of the cover 7l being hinged, it is slidable in a groove or channel 7 2 formed at either end in lianges 7 8 extending from the top of the mold 74. When casting, the cavities are closed by sliding the cover 7l to bring the'openings 76 in the cover 7l out of registration with the cavities 75, but when the castings are to be removed, the cover is moved to bring the openings 76 into registration with cavities 75 thereby allowing the castings to be discharged through the openings 7G.

Having thus described this invention, I 'hereby reserve the benefit of all changes in form, arrangement, order, or use of parts, as it is evident that many minor kchanges may be made therein without departing from the spirit of this, invention or the scope of the following elaimsl I claim: l. In a molding apparatus, the combination of a support, a mold movablymounted thcrea on, a container arranged below the mold to receive surplusmolding material discharged therefrom, when the .mold isin'one position and a. floor arranged below the mold to receive' the castings discharged therefrom when the mold isin another position. l

2. In a molding apparatus, the combination of a. support, a member mounted thereon for back and forth movement, amold pivoted t-o the said member, means to lock said mold against turning when said member is in its extreme forward position, means to lock said mold against turning when said memb-er is in its extreme rear position, a licor yarranged to be under `the said mold, when said member is in its forward position, and a container arranged to be` under the said mold when said member is in its rear position. f

8. In a molding apparatus, the `combination of supporting means; a mold charge able in one position and dischargeable when inverted therefrom, and borne bythe snp- 4 porting means rotatably sojthat it may be turned from one position to the other, and shiftably so thatit may be reciprocated from a charging location at one end of its stroke to a discharging'location at the other end of its stroke; and means constraining the mold fronrturning from its appropriate positionv at the end of a stroke.

4L In a molding apparatus, the combination of supporting means; a mold change-v able in one position andV dischargeable in another, and borne by the supporting means rotatably so that it may be turned from one position to the other, and shiftably so that it may be reciprocated from a charging lo cation at one end of its stroke to a dischargf ing location at the other end of itsstroke; means constraining the mold from turning from its charging position when it is atthc charging location, and means constraining the mold from turning from its discharging position when it is at the discharging location.

5. In la molding apparatus, the combination of supporting means, a mold that comprises separable co-operating matrices and is borne by the supporti'otatably for inversion and shiftably so that it may be reciprocated from a charging location at one end of its stroke to a discharging location at the other end of its stroke, means whereby the separable matrices may be locked together during a stroke, and means constraining the mold against turning` from its appropriate position at the end of a stroke.

6. In a molding apparatus, the combination of a supporting track, a member mounted to reciprocate thereon, a mold piv oted to the said member, and means for automatically looking said moldagainst turning only when said member arrives. at

the end of a stroke With they mold iny prede; termined position.

7. In a molding apparatus, the combination ot' a` pair of .oppositely `disposed standards, a pairk of blocks each adapted tor a reciprocating.movement on a Vrespective standard, a mold intern'iediating the said blocks and pivoted thereto, and means to lock said mold automatically against turn ingpwhen said-blocks arrive at the end ot their stroke-with the mold in an appropriate position.

8. In a molding apparatus, the combination of a support, a member mounted to reciprocate thereon, a mold pivoted to the said members, means for automatically locking said mold against turning Whenvsaid memberV arrives at the endofa'stroke .with the mold in a predetermined position, means arranged to be under the mold at oneend of the said stroke to receive surplus molding` material discharged 'from `the mold thereat, and means arranged to be under the mold at the other end o't' the stroke to receive the castings discharged from the mold thereat. 9. In amolding apparatus, the combination of a base'having upstanding guiding supports at each end, a Ipair of blocks trackingv thereon and guided thereby ina back and forthmovement, a -mold intermediating the said blocks and pivoted thereto, and

j projection on a said support arranged to be engaged by the mold to prevent the latter from turning when it varrives at'the endot a stroke in a predetermined position.

l0. In a molding apparatus, the combij ection of themold to prevent the mold' trom tilting from its proper position thereat when it arrives at the rear'end ot' its stroke.

Il. In a molding apparatus, the combination of a base having a pit-like depression at itsvrear 'side for receiving molding material and having uprights disposedone at each end, and afmold supported on theI up` rights and/adaptedto' be moved back and forth thereon. so as to bring the moldinto and out'oil a position' directlyover the pit.

.12. In a` molding apparatus, the combnation of a pairof oppositely disposed supports, a row of separable (zo-operating molding` blocks vintermediating the supports and having alined bearings, the nearest-to-the middle block having projections one on each end and borne by'a-respectivesupport, a guide rod disposed alongV the row of'blocks and, passing through the bearing of each blockand a supportingfbraeket secured to the nearestto the middle block and to the ends of the guide rod.

FRANK VVILLIAMS-

Images