US2028192A - Die casting machine - Google Patents

Description

Jan. 21, 1936. G. CHERRY DIE CASTINGv MACHINE Filed Jan. 11, 1934 2 'Sheets-#Sheet 2 /A/MsA/ro/e,4 GLC/IERI?? Aria/wir l the die member I8 into and out of engagement Alnien'ieil '.lnn. 21, 1936 UNITED STATES x P'A'llaN'rj oFFlcE Application Jennery 11, 1934, serial No. 'loam z (ilaims. (CL 22-93) This invention relates to die `casting mac g es, and more particularly to a core actuating m hanism for a die casting machine.

An object of this invention is to provide a simple and efcient core actuating mechanism for a die castingl machine, or the like, the mechanism being readily adapted to accommodate variously arranged cores for different dies.

In accordance with the general features of this invention as applied to av mechanism foractuating the cores of a' die casting machine of a usual type employing a die comprising cooperating, movable and stationary die parts, there are provided in one embodiment three core actuating motive uid cylinders' adapted to `be permanently mounted radially around the dieon a mounting core actuating mechanism of this inventionl the.

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plate for the stationary die member. -'Ihe piston of each cylinder is connected to actuate a slidel guided in the mounting plate for the stationary die member for movement toward and away from the die so'thaty cores may be withdrawn from three sides of the die, each slide adapted to carry at its inner end an interchangeably mounted adaptor plate by means of which variously ar- R Fig. 1 is a fragmentary side view. paltly in section, of a die casting machine embodying the -die parts being shown in their closed position;

Fig. 2 is a. vertical section taken oir the line rig. 3 is n'n enlarged vertical seetin taken on `Referring now toJthe'drawings, and particuating mechanisnl'i is illustrated in connection-with a. die casting machine of a usual type, shown fragmentarily, which comprises movable and stationary die parts I and Il, which are carried upon movable and stationary vertical plates I2 and I 8, respectively, the movable .die plate. I2 may be reciprocated by actuating mechanism (not shownl connected thereto by a link -I 4 to move withthe die member II during thecasting operation, the die plate |12 being suitably supported during its reciprocation updntlie machine frame,

'larly to Fig. 1, wherein the improved core actu- Fig. l, provide a casting cavity I8 which is shaped to mold a casting I8 having three sets of apertures spaced 90 apart, each set comprising three apertures indicated at 28, 2l, and 22, the apertures 2| being deeper than the other sets of 5 apertures with some of the apertures alineil with each other and with the parting line, indicated at 25, of the die parts I0 and Il. The apertures 20, 2 I, and 22 are formed by appropriate cores 26, 21

and 28, respectively, which are inserted in and 10 complementary sets of depressions 29 for slid- 15 ably receiving certain of the cores 26, 21 and 28, while the other cores are received in apertures 80 formed in the stationary die part I I, the cores being withdrawn from the casting I8 when the cast metal starts to cool and shrink.

An individual hydraulically actuated mechanism is ,associated with each set of cores 28, 2l, and 28 for advancing them into operative' posi-- tion relative to the casting cavity I8,and withdrawing them from the cast metal forming the casting I8, two fof the hydraulic mechanisms being indicated in general at 88 and-84 spaced 90 apart, the hydraulic mechanism' which is connected to the cores 2B' being omitted to conserve ated with each set of cores 28. 2l and 28, respectively, are identicaL'l'lnless otherwise described, only one such mechanism, nameLv, mechanism 84, will bedescribed.

space. Since the'hydraulic mechanism associ- 30 Integral with-the stationary die plate I8, one

is mounted a one piece hollow slide 8 8 provided 40(4 with vil. rectangular shaped opening 88. One of the slideways 88 is removably secured to the arm 8l, as indicated at I8 (Figs. 1 and 2), t0 permit the' slide 88 to be readily mounted uponand removed from the arln.l Secured to the left`side of the arm 85 (Fig. 1) and projecting freely into the opening 88 ofthe slide 88 is a motive iiuid cylinder Il.' The particular cylinder 4I to be n described is associated with the hydraulic mechanism `88 and'isxspeciflcally referred'to since it is more fully illustrated in sectionyin Fig. 1 and will at the same time describe the cylinder II associated with the mechanism 84; i The cylinder-4|' is provided with eireulnr bosses 42 ai eeen end which fit tightly into circular openings inl ss the arm 35 and are locked Atherein by circular ttings 43 abutting the right sidevoi the arm .and secured 'thereto by screws 44, the ttings being slightly larger in. diameter than the bosses 42.

Formed in the ttings 43 and the cylinder bosses 42 are communicating passages 41 whereby motive iiuid may be alternately entered into and exhausted from opposite ends of the cylinder in the operation of withdrawing the cores from the casting I9 and inserting them into or operatively associating them with the die parts I l) and II. The iluid passages 41 are connected to a 'suitable motive uid transmission (not shown) by ports 48v in the ttings 43. e motive uid is directed to one end or the other of the cylinders k4I by control valves included in the system. Referring again. to the mechanism 34 (Fig. 2), a piston 49 within the cylinder 4| carries a piston rod 58 which extends through the outer end of the cylinder, a packinggland 5I being interposed between the rod and the cylinder to prol.vide a iluid tight t. The outer end of the slide 38 is formed with a shouldered opening 54 within which is carried a shouldered circular collar 55 which is keyed as indicated at 56 to the outer end of the piston rod 50 to prevent relative rotation therebetween, the'lattenabutting the inner surface of the outer en'd of the slide. Formed axially in the' piston rod 50 is a shouldered aper-l ture 51 which is threaded at -its outer end, the aperture in the collar-55 being correspondingly threaded. A screw 58 is'threaded into the aperture 51 of the piston. rod 50 and the aperture of the collar 55, an enlarged outer end of the `screw 58 cooperating with a stop surface 59 on an inner surface of an end member 60 of the arm 35- to limit the movement of the piston rod toward theright, as viewed in Fig. 2. The screw 58-,is-provided at its outer end with a depression 1 for the reception'of a, tool whichmay be inserted through an aperture 62 in the member 60- of the arm 35 to adjust the screw. It will be apparent that the screw 56 and the key 56 serve to rigidly connect the piston rod 50 to the slide 38 so that the latter will move at all times with the piston 49 and Kthat by threading the screw inwardly or'r outwardly relative to the threaded apertures the distance the piston rod will travel toward the right before the enlarged end of the screw 58 engagesthe stop surface 58 may be varied and thereby the movement imparted to the slide and the cores 28 carried thereby. The diameter of the: aperture 54 of the slide 38 and the collar 55 entered therein are such that the collar -may freely move laterally to aline itself with the screw 58, the thrust of the piston rod 50 upon the slide 38- during its movement in opposite directions being taken at the points 64 and 65. It will benoted that the hydraulic mechani'sm 33 is designed toprovide for a greater .movement for the slide 38 and the attached cores 21 to and from the die parts I0 and II than in thel case of the mechanism 34. This permits a dieu casting machine equippedwwith the core actuatingi to produce a greater variety of castings.

Removably secured to the left end of the slide l 38 (Fig. 2) by upper and lower pairs of through bolts 66 is a core carryingl adaptor plate 61th e bolts ertending the full length of the slide. .The plate 61 supports .the cores 28 which may be variously arranged thereon to correspond with core apertures inJ the die parts I0 and Il which are mechanism of this invention to be used a sliding t in shaped to form a particular casting and consequently with different-types of castings the plates may vary in lengthv and width and within the capacity of the die casting machine being used. The cores 28, which are provided with heads at their inner ends, are inserted through shouldered apertures formed in the plate 61 and rigidly 'secured in position thereon by back-up screws 68. The movement of the cores 28 towards the left (Fig. 2) is limited by the engagement of the plate 61 with the die part II. It will be understoodthat the core supporting'plate 61 may be provided with a plurality of variously arranged apertures of uniform size or varying in size so that diierent combinations of cores may be arranged thereon to correspond with the arrangement of core apertures in diierent die parts I and II. -In some cases' one core plate 61,may serve for several dierentdie parts I0 and II, the cores being inserted in particular apertures of the plate and omitted from the other apertures thereof.A In the drawings lonly one set of apertures in the core plate is shown. Thus the plate 61 may be readily removed from the slide 38 to arrange for a diierent combination of cores therein or to change plates when setting up the machine fora diierent run of castings.

The stationary die supporting plate is provided with a plurality of predeterminedly spaced rows of threaded lapertures 18, as clearly shown in Fig'. 2, whereby die parts II of different dimensions for various castings wit-hin the capacity of the die casting machine may be fixed to the plate I3. The movable die part I0 and an ejecting mechanism for the castings, indicated at 69, are secured to the plate I 2.in a suitable manner (not shown) which will permit diilerent die parts I8 corresponding to diierent die parts II to be secured in position upon the plate I2. The die part Il, secured to the plate I3 by screws 1I extendingt rough apertures at each corner of the die part, the apertures in the latter being spaced for alinement with certain apertures 10 of the plate. It will be readily apparent 'that by "suitably spacing-the apertures' 10 in the plate I3 a great number of diilerent die parts II may be used on one machine. Thus it will be apparent diierent die parts I0 and II may be readily mounted upon the plates `I2 and I3, respectively, which feature takenwith the means for readily adapting the hydraulic core actuating mechanis to accommodate various arrangements of core for corresponding di pro- ,vides a combination in a die casting machine p metal is supplied to the nozzle 16 under pressure through the yusual gooseneck'employed'-in die casting machines/oi? well known type; wherein the gooseneck may be either stationary or movable.

The-die part I I is cooled by a4 suitable medium which traverses emciently` arranged circulating paths an and si (Fig. 2) Aformed in the body oi the die port. Associated with iniet and outlet. ports of each of the paths 88 and 6I -are yieldablyl self-adjusting -.i'oint connections 82 comprising'a spring pressed shouldered pipe fitting s3 having e shouldered aperture s4 in the plate I3, theyinn^er end of-the iitting having'a' seat in the die partwith a washer between the die part and the tting. Between an enlargement on the fitting 83 and a shouldered surface of the aperture 84 is a compression spring 85, the spring nection and connection of the circulatory paths 80 and 8| from and to the matically made.

In the Voperation of the aforedescribed mechanisms and as shown in the drawings, the 4die ttings 83 are autoparts I8 and II have been closed by the movement .-of the die part I0 into abutting relation with the stationary die part II, the cores 26, 21, and 28 having been moved by their hydraulicl actuating mechanisms into the casting cavity I8 of the die parts, and the moltenmetal injected through the sprue and the gate 11 from the nozzle 16 into the casting cavity around the cores inserted therein to form the casting I9. As the casting I9 starts to cool and shrink the cores 26, 21, and 28 are retracted from the casting by their respective hydraulic actuating mechanisms, which as hereinbefore described, are connected to a motive fluid transmission system (not shown) through the ports 48, the motive fluid being directed to the inner end of the cylinders 4I by the control valves included in the system. The movement of the cores outwardly is determined by the adjustment of the screws 58 in the piston rods 50, the outer ends ofthe screws engaging the stop surfaces' 59. In timed relation with the retraction of the cores 26, 21, and 28 the die part I0 is moved away from the die part II and the casting ejected. f

Although the invention has been described and illustrated as to one specific embodiment, it will,

of course, be understood that the invention is not to be limited thereto, but is to be limited only by the scope of the appended claims.

What is claimed is:

l. In a die casting machine, a die supporting plate `for interchangeably supporting a plurality of different dies having variously arranged cores for movement into and out of the corresponding die cavities, and core actuating means comprising a hollow 'slide mounted directly on said die supporting plate for movement toward ,and away fromy the die, elongated slideways on the supporting plate extending substantially the full length of said slide for guiding the same in its movements, a motive fluid cylinder attached directly to the supporting plate within the hollow of said slide, a piston in said cylinder connected for actuating the slide, and a readily replaceable adaptor plate on the slide for'connecting the slide interchangeably with variously arranged cores of the diierent dies. Y

2. In a die casting machine, a die supporting plate for interchangeably supporting a plurality of different dies having paths formed therein for the passage of cooling medium therethrough and -variously arranged cores for movement into andl out of the corresponding die cavities, and spring pressed cooling medium connections carried by said die supporting plate for automatically making connections to the circulatory paths formed in the plurality of different dies when interchangeably supported on the supporting plate, core actuating means comprising a slide mounted directly on said supporting plate for movement toward and away from the die, elongated slide ways on the supporting plate extending substantially the full length of said slide for guiding the same in its movements, a motive fluid cylinder attached directly to said supporting plate, a piston in said cylinder connected for actuating the slide, and a readily replaceable adaptor plate on the slide for connecting the slidev interchangeably with variously arranged cores of the diierent dies.

GEORGE L. CHERRY.`

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