US2070564A - Founding device - Google Patents

Description

Feb. 16, 1937. A, v, DAMBERG ET AL 2,070,564

FOUNDING DEVI GE Original Filed Jan. 13, 1932 IN VEN TOR.

Il-IllL Patented Feb. 16, 193'? UNETED STATES PATENT OFFICE FOUNDING DEVICE Application January 13, 1932, Serial No. 586,284 Renewed April 20, 1936 3 Claims.

This invention relates to a founding device, and more particularly to what may be termed a universal match plate wherein a single frame is provided to interchangeably locate and support a large number of variously shaped patterns.

Heretofore, it has been customary in founding to produce a mold of the article which it is desired to cast by means of gated patterns, viz: a gate for molding a channel in the sand through which the molten metal flows and which has a plurality of solid patterns affixed to extensions or leads 01f of the gate to form molds or impressions in the sand corresponding with the shape it is desired to cast.

A gated pattern may be economically made and provides means for forming a large number of castings upon a single pour of molten metal. However, it has the disadvantage of making the founders work slow in preparing the sand mold prior to the pouring operation for the connection of the pattern to the gate is necessarily very fragile, leaving the pattern comparatively unsupported, and because it fails to provide a definite parting line considerable personal skill must be exercised at the time of ramming-up the sand. Because of these several factors the gated patterns are losing favor and are being replaced by devices known as match plates.

Match plates are similar in many respects to gated patterns but differ mainly by the provision of a board or plate dividing the patterns in half in such manner that the one-half of the pattern may be impressed in the sand of one-half of a two-part flask and the other part in the second part of the two-part flask, the plate being then removed to permit the halves of the pattern impressions in the sand to come together for the pouring operation. This form of founding devicehas the advantage of providing a strong support for the plurality of patterns and provides a definite structural parting line which makes it unnecessary for the founder to exercise any personal skill during the ramming-up operation.

This form of device has come into considerable use during recent years and makes it possible for the founder to quickly prepare his molding flasks prior to the pouring operation. It has one disadvantage however, which limits its use over the gated pattern and still makes it necessary to use the gated pattern in spite of its disadvantages and that is the initial cost of making the match plate, for the board or plate dividing the patterns must necessarily be extended considerably to serve as a separator between the two flask parts during the ramming-up operation and carry 10- eating devices thereon to hold the plate in a predetermined relation relative to the two parts of the flask.

The present invention retains the advantages of the best features of the gated pattern, viz: 5 adaptability for use with a small run of parts and also retains the main advantages of regular match plates by the provision of a dividing board or plate for the pattern halves which furnishes a definite parting line but which does. not have the disadvantages of the costly construction in reg-- ular match plates, for it is unnecessary to provide a plate which extends between the flask half parts and unnecessary to provide a locating means on each of the match plates. It has further defil5 nite advantages in use; for instance, it enables the foundry man to run-in short order casting jobs with long order jobs, without tying-up a number of small only partly used flasks for small orders, assures a balanced production of mating or related castings, and speeds up the casting operation to form a number of dissimilar castings from dissimilar plates upon a single pour.

Other features and advantages will hereinafter appear. 5

In the drawing:-

Figure 1 is a top plan view of the present invention.

Fig. 2 is a side view of the device shown in Fig. l.

Fig. 3 is a sectional view, taken on line 3,3 in

Fig. 1.

Fig. 4 is a top plan view, similar to Fig. 1, of a modified form of the present invention.

Fig. 5 is a sectional view, taken on line 55 3.5 in Fig. 4.

Fig. 6 is an end view similar to Fig. 5, but in section.

In its present preferred form this invention comprises a main frame ID, having a solid end or cross piece II and two side walls l2 and I3, which are preferably made integral or assembled in such manner that they form. a rigid unit. The side l2 at its outer or free end is provided with a tongue l4 and slot l5 connection with a movable cross bar [6 which forms a fourth side wall for the main frame. This latter cross bar is preferably pivotally mounted on a stud ill and movable into an inoperative position shown by dot-anddash lines I8 and into an operative or closed position as shown in Figs. 1 and 2 where it is held by a latch I 9, which is hereinafter described in detail.

The three-sided portion of the main frame H) which is of substantially U-shaped construction provides a single large opening 20 adapted to receive a plurality of large size match plates 2|, for example the plates 22, 23, and 24 each being provided with patterns, a gate and a sprue pin similar to patterns 25, a gate 26 and sprue pin 2'! on the plate 22. According to the present invention there is provided a lug 23 and slot 29 connection between the plates 2i and frame In so that it is possible to interchangeably connect matchplates to the frame by merely sliding the lugs 28 lengthwise in the slots 23 of the side bars until the first match plate 22 engages the solid cross bar H and the plates 23 and 24 may thereafter be slid into the frame until all three butt against each other as shown in Fig.1 whereupon the pivoted cross bar iii is moved. into its closed or operative position. I

According to the present preferred form of the invention the main frame I is adapted to interchangeably accommodate a plurality of match plates, either three one-third plates, as shown; or a two-third size plate and one-third size plate together; or a single three-third size plate, (one plate equivalent the three plates shown); or if desired four one-quarter size plates may be set in the opening. These, in accordance with the particular combination of parts which the foundry man desires to cast and the nature of the run or order. In the latter connection, short order plates are placed in the outermost section of the opening 20 or at the left end as viewed in Fig. 1 so that the short order plates 24 in this instance, may be replaced without disturbing the long order plates 22 and 23.

In accordance with the present invention the movable cross bar I6 is swung into closed position about its pivot l1 until a tongue 35 thereon enters a slot 3| at the end of the other side wall l3 where its movement is stopped by either the side 32 of the plate 24 through the three plates engaging with the solid cross bar H or the abutment 33 portion of the slot 3! in the side piece E3, or both. Now, of particular importance, the tongue 30 section of the movable cross bar It extends beyond the side piece l3 where it is provided with the clamping and holding latch l9 which is provided with a slot 34 to fit over the tongue '30 and has a pin 35 connection therewith. A disk section 36 of this latch is provided with a flat 31 adapted to clear the side wall of the side piece i3 as the bar I6 is moved from the open position shown by dot-and-dash lines l8 into the closed position and the point 38 of the disk 36 thereon squeezes the side bar 13 toward the other side bar l2 until it engage-s the ends 39 of the cross bar as thearcuate section 40 of the disk sweeps into the concave notch 41 in the side piece. The latter serves to complete a rigid connection between the outer free ends of the side pieces I2 and I3, to move them into the proper width should there be any normal tendency to spread and serves as a latch to prevent the movable cross bar Hi from swinging about its pivot pin ll toward the open position, and away from the end of the side piece IS. The latch i9 is provided with an extension 42 for manually turning the disk section 36 into its various'arcuate positions. -It may be frictionally held in any station by providing a snug fit between the tongue 39 and slot 34; however, it is preferably provided with a screw 43 connection to the side piece l3 at its outer end as shown in Figs. 1 and 2. Y i

' The work of opening and closing the movable cross bar It and changing the match plates 2| in theframe Hi may be very easily and quickly I performed. After the desired selection and arrangement of plates is'located in the frame andthe cross bar It is locked in place with the latch 59 the founder places the entire assembly onto the lower half of a flask, of any one of the now well-known forms of construction, in proper place throughthe notches 44 of locating plates 45 en-- gaging with suitable projections on the flask, and then rams-up the sand around the patterns carried by one side of the plates 25 of the present invention. I

Preferably, the width of the side walls l2 and I3 and the length of the plates 22, 23, and 24 are such that the side wallsof the flask underlie the ends of the plate a slight extent as shown by dotand-dash lines 46 so that any load or strains during the molding or ramming-up operation are transmitted directly to the match plates rather than to the frame. After the lower half flask is properly rammed-up the upper half flask (not shown) is applied to the lower half flask and the match plate to be in turn rammed-up after which the flasks are moved apart and the device of the present invention is removed until a board section 4'! of the match plates no longer spaces the two flasks and thetwo flasks and the pattern metal which is poured through a sprue hole,

formed by sprue. pin 21 in the upper flask, flows freely and quickly to the diiferent pattern impressions to form the castings. With that form of pattern shown in the plate 23, a single disk impression with a convex face is formed in the sand carried by the upper flask; however, with the plate 22 each pattern 25 leaves a large diameter impression in the upper fiask corresponding with the disk 25d and leaves a small diameter impression in the lower flask corresponding with the disks 25b which come together when the flasks are brought together and which form a double diameter button-like casting after the pour. H 7

Thus, the present device provides astructure where heretofore impractical small match plates 50 gle row or string of match plates, which may be termed the large size plates 2| in the single opening 20. However, the device of the present invention is adapted to be used, andxadvantageously too, for a double row or string of small size match plates 48, and to this end the frame l0 which may be the same as with the preferred form of the invention is provided with a central dividing bar 49 either made integral with the main frame II] or made as a demountable part having a tongue 50 and slot 5| connection with the preferred form of frame It hereinbefore described, and as'shown in Figs. 3, 4, and 6, where it may be held in place either by a snug vfit between the of a holding screw 52." I

This central dividing bar is provided with two longitudinally extending s1ots,53, and 54, similar to the slots 26 in the side pieces I2 and I3 adapt,- ed to receive lugs 55-, on the ends of the small size match plates 56, 51, 58, 59, and 60. When assembled to the frame l0. or when made integral with it the bar 49 forms a double opening-6| and 62 or double row of apertures while the lug 55 on the opposite end of the plates fits into the regular slots 29 in the main frame to which the various small size match plates through the lug and slot connection may be assembled to the frame by sliding them longitudinally into place, as with the large size plate of the preferred'form of the invention hereinbefore described. Preferably, the long run plates are placed closer to the solid cross bar I l andv the short run plates are placed nearer the other end adjacent the swinging cross bar [6. After the frame is loaded with the desired small match plates 48 the movable cross bar i6 is swung into place and locked with the latch l9. As it moves into the closed position the tongue section 50 thereon moves into the slotted section 5| at the end of the central dividing bar 49 to support the outer end of the bar during use and manipulation of the device after assembly of the plates thereto.

With this form of the invention, as shown, it may be possible to assemble from two to six different plates to the frame of either one-third, two-thirds or three-thirds size in the openings 6| and 52. The device may be made for a combination of half size and quarter size plates to accommodate a total of eight plates if desired. Other combinations may also be formed within the purview of this invention.

Now, of particular importance, and according to the present invention the central dividing bar 49 also serves as a master or main gate for any and all the plates 48 which are assembled to the device, and through the medium of a single sprue pin 63 if desired, or through the end sprue pins 64 and 65. This main gate comprises a longitudinally extending rib 66 on the central bar 49 and is provided with extensions 61 which are so placed that they align with secondary gates 68 on the individual match plates 56 to 58 and serve as feeders thereto from the main pour entering a hole in the sand flask formed by the sprue pin 63 and while the secondary gates 68 feed the individual pattern impressions at the time of the pour. With this type of construction, provided by the present invention, it is unnecessary to provide sprue pins on any of the small size match plates. the foundry man to move the plates about much more freely without danger of knocking off a sprue pin, as occurs often with the usual form of match plate and enables him to store a large number of these plates in a limited space because the plates may be laid one upon the other, something which is not possible when a sprue pin is provided on the plates.

There is also another advantage during the pouring. In the past it was customary to provide a sprue pin on each match plate which would make necessary five distinct and separate pouring operations with a run of parts such as that shown in Fig. 4 whereas but a single pour is necessary with the present structure, resulting in a considerable saving of time and an improved casting, for 'the entire pour may be made while the molten metal in the casters ladle is in its hottest state and not after it is cooled considerably as a result of the time consumed in the five distinct pouring operations with the old form.

This is a real advantage for it enables neth rd s et advanta e his iermh s he i t s, fa at althou h; ithas ere; before i n e onomi n ate; n r ense s l mat h. la s ibis p ssible with the. present n n on M h. at s ma e made and, used which re a small fraeiien t sizee what a t m d a e ian ar isize.mate lnl tei e. with, the, s da liv me hod. ere eforepurs e it ld; be necessary to make a. inele p ate with. a prox ma y hir vix. of he pattern .25 h n a d, h a ar e. flask separa or. and and h leees: .1 each, Wh reas a o di to he pr ent; i ven ion m e pi. e 6 e made with. but.sinnatternsuthereoni less t r e se arai rxb nda d; eea namea en hlat hanle ie-s xth he comet-makin the standard size plate. Also, it has the advan- V tage of insuring a balanced output of mating castings; for instance, if castings from the patterns 69 and 10 are used in a single device there will be a balanced output of castings from the eight large size patterns 69 and from the eight small size patterns 10 if the plates 51 and 60 are placed into the frame l6 and taken from the frame at the same time.

When it is desired to change one or more of the plates in the frame ID in either of the openings 6| or 62 it is merely necessary to swing the latch I9 into its open or inoperative position and then swing the cross bar l6 into the open position shown by dot-and-dash lines l8, then remove the desired plate and replace it with another band and again close the movable cross bar into the locked operative position whereupon the device is again ready for use.

If desired, the movable cross bar l6 maybe made as a removable piece rather than by having thepivotally mounted bar and it may be assembled to the frame III by passing a removable pin H or a screw (not shown) through the cross bar and through the outer ends of the side pieces l2 and I3 when the cross bar I 6 is in closed position thereon.

Should it be desired to run only mating pattern match plates in the skeleton match plate, for instance, two one-third size plates 2| with an lei equal number of patterns on each of mating casting match plates, the one-third unused space in the opening 20 may be filled with a plain plate or board 41, of the same thickness as the walls of the frame I0, having no patterns thereon. Thus, a balanced output of mating castings may be insured.

Other variations and modifications may be made within the scope of this invention and portions of the improvements may be used without others.

Having thus described the invention, what is claimed as new and for which it is desired to obtain Letters-Patent, is:-

1. A device for use in founding comprising a three-sided main frame; a match plate or plates having a connection with said main frame to be located and supported thereby; and a cross bar pivotally mounted on said frame for movement into a closed position relative to the frame; a lever pivotally mounted on said cross bar; and a lobe on said lever adapted to enter a notch in the frame when the cross bar is in closed position for looking said cross bar in closed position and for locking the match plate or plates in the frame.

7 2. A device for use in founding, comprising a three-sided main frame; interchangeable sectional match plates having a connection with the j main frameto belocated and supported thereby,

said connection holding the plates against vertical movement and permitting longitudinal movement; a cross bar pivotally mounted on said frame forming a fourth side for the main frame and adapted to prevent longitudinal movement of the match plates when in closed position; a tongue on the free end of said cross bar fitting into a slot in the end of one of the sides of the main frame; a lever pivotally mounted on the tongue; and a semicircular lobe on said lever adapted to enter a semicircular notch in the frame, -to preventv the three-sided frame from a spreading and lock the cross bar in closed position.

3. In a match plate for squeeze machines; in

} combination, a rectangular frame comprising two side frame members and one ehd'fraine member fixedly secured together, an end frame member pivotally secured at one end to the free end of v aside frame member, the free end of the other members being grooved, at least one match'plate 7 section and at least one tongue formed on 0pposed edgesof a match plate section for reception in the grooves. v

7 I ALFREDVV. D'AMBERGL CLAUDE CADY.

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