US2672662A - Apparatus for producing die cast sliders - Google Patents

Description

March 23, 1954 L. H. MORIN 2,672,662

APPARATUS FOR PRODUCING DIE CAST SLIDERS Filed June 2, 1950 V v Shegts-Sheet 1 ENTOR LOU H. MORIN ATTORNEY March 23, 1954 L. H. MORIN 2,672,662

APPARATUS FOR PRODUCING DIE CAST SLIDERS Filed June 2, 1950 2 Sheets-Sheet 2 11mm, 25 r 1 m 1H,, 27 x" 30 55 INVENTOR LOUIS H. MORIN ATTO R N EY Patented Mar. 23, 1954 UNITED STATES FATENT OFFICE APPARATUS FOR PRODUCING DIE CAST SLIDERS 5 Claims.

1 This invention relates to the production of sliders for separable fastener stringers. More particularly, the invention deals with an apparatus for die casting sliders with holes formed in the raised ears on one wall of the slider for pivotal mounting of a conventional pull. Still more particularly, the invention deals with a die and core structure, with means for automatically moving the cores out of engagement with the casting, after the dies are separated and preparatory to stripping the casting from one core member on which the casting is arranged.

The novel features of the invention will be best understood from the following description, when taken together with the accompanying drawings, in which certain embodiments of the invention are disclosed and, in which, the separate parts are designated by suitable reference characters in each of the views and, in which:

Fig. l is a side and sectional view through part of an apparatus for forming die cast sliders, showing a. face view of one die and illustrating the parts in the casting position, the section being substantially on the line I--I of Fig. 2.

Fig. 2 is a sectional view at right angles to Fig. 1 looking in the direction of the arrow 2 of Fig. 1 and showing the dies in separated position, with parts of the construction broken away and in section.

Fig. 3 is an enlarged sectional view on the line 3-3 of Fig. 1.

Fig. 4 is a view similar to Fig. 1 showing the parts in a diiTerent position and omitting parts of the construction.

Fig. 5 is a perspective view of a die cast slider made according to my invention, showing the slider on an enlarged scale; and

Fig. 6 is an exploded perspective view showing the die parts and core elements with one die part in an improper relationship to the other die part to illustrate the mould surface thereof.

In the formation of die cast sliders of the kind under consideration, a problem has prevailed in the formation of pivot holes in projecting ears of a slider for the pivotal mounting of a fingerpiece or pull in connection therewith. It has been common practice to form sliders of the kind under consideration with the pivot ears, but it has been essential to form the pivot holes of said ears in a separate machine operation. This separate operation has required the special additional handling of the slider and feeding of the slider in a machine for the drilling or punching of holes in the ears thereof.

Keeping in mind that, in the production of slide .fasteners orthe many ,diiferent sizes, it. is

essential to provide correspondingly different sized sliders for such fasteners. It will thus be seen that the confusion of forming the pivot holes in the many devices .of this type and kind has materially jeopardized production and added to the cost of producing devices of this type and kind by reason of the special handling and the need for performing additional operations thereon.

I have overcome these objectionable features by simply providing, in a machine of the kind under consideration, a die and core structure and a means for actuating certain cores which will automatically form pivot holes in the ears of sliders of the kind under consideration. It will thus be apparent that, after the casting has been formed and aside from the trimming and final finishing operations that may be performed thereon, the slider is ready for use or in condition to receive the fingerpiece or pull which is coupled with the apertured ears of the slider, as is known in the art.

The product to be formed is illustrated in enlarged perspective view in Fig. 5 of the drawing, in which figure, l 0 represents a slider, comprising a channel body defined by top and bottom walls II and I2, joined and spaced at the wide end of the slider by a connecting web l3. Side edges of the walls of the slider have inturned flanges, one pair of which is seen at M in Fig. 5. The top wall II of the slider has upwardly and outwardly extending ears I5, having apertures I5 therein and the apparatus herein disclosed is designed to produce the slider I9 and, particularly, in the formation of the apertures I6 in the ears I5. It will be apparent that the top wall II, outwardly of the ears I5, is slightly recessed, one of these recesses being seen at I! at the left of Fig. 5. Sliders of the kind under consideration can be made of the normal or lock type and, in Fig. 5 of the drawing, a lock type slider is illustrated. In other Words, anelongated aperture I8 is formed in the wall II adjacent one of the ears I5, the aperture opening into the channel of the slider body for entrance of a lock element upon a pull, as is well-known in this art.

The inner surfaces of the walls I! and I2,

between the web I3 and the side flanges I4, are

bevelled outwardly to provide a wide entrance to the channels of the slider and one of these bevelled surfaces is seen at I9 on the wall I2 in Fig. 5 of the drawing.

To produce the slider shown in Fig. 5, I provide a pair of dies 29, 2|, which are shown in adistorted perspective view, Fig. 6, to clearly ,i l-

lustrate adjacent surfaces of these dies. At 22 and 23 I have shown the top and bottom core members for forming the channels of the slider body, the web l3 and the flanges M, as well as the bevelled surfaces, as at N. At 24 and 25 I have shown two swinging core members which form the ears l5 of the slider, as well as the pivot apertures l6 and also the recesses, one of which is seen at .l .1 in the resulting slider.

Considering Fig. 6 in conjunction with Figs. 1, 2 and 3, it will appear that the die has two vertical channels and 21 to receive the core members 24 and 25. The channels2$ and 27 open outwardly through the surface 28 of the die 2! Spacing the channels 26 and 2'! one from the other is a bar 29, the outer surface 30 of which sets inwardly with respect to the surface 28 and has a cavity therein which forms part of the wall ll of the resulting slider m. Extending from the cavity 3! is an elongatedmember 32 which forms the aperture l8 in the slider wall H.

It will appear from a consideration of Fig. '3 of the drawing that, outer adjacent corner portions of the cores 2d and 25 have vertically .ex-

tending grooves 33 and 34, respectively, in which the core 22 seats, thus bringing the surface '35 of the core 22 in abutting engagement with the surface30 of the central bar29.

Adjacent surfaces of the cores 24 and 25, at their lower ends, have cavities formed therein and one :of these cavities isseen in Figs. 2 and 6 at 36 upon'the core 25. This cavity forms the outer portion of the wall I I, including one of the ears l5 and disposed inthe cavity is a pin portion 31, which forms one of the apertures Hi. It will be understood that the other core 24 has a similar cavity and pin structure for forming the other side of the wall H, the other .ear [5 andthe other aperture it in said ear.

Both pins, such as the pin 31, will be slightly tapered so as toform slight tapers in the apertures '16, as indicated clearly in 'Fig. 5 of the drawing and, that part of the cavity forming the ears l5, will also be at aslight taper so as to facilitate free freeing of the cores 24 and 25 from the casting in the manner later described. It will also be noted that the lower ends of the grooves33 and 34 have rounded portions, as at 38 which define the outer contour of the flanges l4, these rounded surfaces fitting upon the ribbed side surfaces 39 and 40 of the cores 22 and 23, these ribs forming the clearance between the flanges 14 as at 41 in Fig. 5 of the drawing.

The cores 22 and 23 are interfitting one with respect to the other to collectively define the cored portion of the slider 10 in definin the channel structure of the slider. In other words, the lower end portions of the core 22 is'forked, as'seen at 42; whereas the upper end of the core 23 has a projecting tongue 43 enteringthe fork, the tongue having a V-shaped recess at its upper end, as seen at 44, which recess, in conjunction with the base of the forked end 42, forms the web l3 of the-slider. At 45 in Fig. 6 of the drawing can be seen the bevels upon the core 22 which form the bevelled walls, as at).

In Fig. 6 of the drawing, the die 2| is turned-to a distorted position to illustrate clearly the surface 46 of the die. This surface has a cavity, as at 41, to form the wall portion 12 of the slider and opening into this cavity are two intercommunieating gate passages 48 and 49, openinginto a common admission gate 50, into and through which molten metal is adapted to be pressure injected in the usual manner in forming the casting. The gate passages 48 and 49 are also placed in communication through the medium of a cavity 51 which simply establishes an enlarged chamber or expansion, facilitating a balanced flow of the casting material to insure formation of perfect castings. The die 2 has a notched portion 52 adjacent the cavity 5| which is sealed by a V-plug 53 on the companion die 20.

The surface 45 of the die also has a recess 52 which opens into the cavity 41 and is adapted to receive the core 22 as is clearly illustrated in Fig. 3 of the drawing.

With the present construction, the gate passages, as well as the gate opening, is disposed on one surface only of the die. The opening 5!] is preferably formed in what might be termed a nozzle portion 55 and this nozzle portion seats .on a corresponding nozzle portion 56 on the die 20, as will be apparent from a consideration .of Figs. 3 and 6 of the drawing.

Considering now Figs. 1,2 and 4 of the drawing, I have shown at 51 the framepart of .a casting machine disposed immediately over the dies 2i], 2! and in spaced relation thereto. This framepart has a vertical channel 58 inwhich is mounted a slide 59. The channel 58 has opposed grooves 6i! and the channel at the lower portion of the frame d? is enlarged, as seen at 6|, the enlargement 6i joining the channel 58in cam surfaces, as seen at $2.

The frainepart 53 has, inits upper portion, an aperture '63 opening into the channel 58 and operating in the aperture 63 is anoperating lever E2 mounted upon a rocker shaft 65 suitably driven by the machine. The lever 84 has an .enlarged end 58 having rounded upper and lower surfaces 'fil, as clearly seen in Fig. l. The enlarged end to operates in a transverse aperture 68 in the slide 59. v

The slide 59, at its lower end, is recessed on one side, as seen at 69 and pivoted within the recess 69 of the slide, as seen at), are'the'two swinging cores 2d and'25. Thecores 2d and 25'are enlarged at their upper ends, as indicated at 7.] and i2 and conform generally to the contour of the lower reduced end "[3 of the slide '58. The'core 22 fixed to the surface of the end 13 of the slide by a plurality of screws 14, the core projecting below the end 13 as will be apparent.

The upper ends of the cores 24 .and 25 are recessed on one surface, as seen at 15 in Fig. 2 of the drawing for reception of large rollers .16

rotatably mounted in the upper ends of the cores on pins 1'1.

It will be understood that, while the framepart 51 is indicated as being of one part, this frame can be formed of two parts suitably secured together to .form the channel 59 therebetween. Thislis .a mechanical expedient which forms no part of the present conception. Supported within the channel 58 .on one wall thereof is a bracket I8 supporting, between the .rollers '76, a, spreader bar 19. The upper end portion thereof, is bevelled as seen clearly at 8D in Fig. 4 of the drawing. The bevelled end is located sufficiently below the cam surfaces 62 to allow .the rollers 16 to move inwardly toward each other, after clearing the upper bevelled end 8B on the bar l5.

Supported on the upper end of the slider 59 is an offset plate 8|, see Fig.2, in which is adjustabiy-supported astop screw 82. This screw cooperates'with the :framepart 51 in deflnitelyronea and 25 for proper positioning within and between .adjacent surfaces of the dies 2il2|. At 83 in Fig. 2 of the drawing I have illustrated a stripper finger which can be suitably supported in any desired manner in the machine and this finger will be so positioned as to strip the cast slider from the core 22 in upward movement of the core, as will be apparent from the following description.

Normally, the various parts are in the position shown in Fig. 1 of the drawing with the dies 20, 2! in abutting engagement with each other and with the various core members. In this connection, it will be understood that the dies 2B, 2! are movable toward and from each other in any desired manner, as in casting machines of the kind under consideration and wellknown in the art. After casting material has been injected into the cavity through the various gate passages 50, 48, 49 to form the cast slider i U, the dies are then separated, after which the slide 59 is moved upwardly through the medium of the lever 64 and, in this upward movement, the casting is carried by the cores 22, 24 and 25. 'This also removes the casting from the core 23 which may be stationary or moved in the opposite direction. As this movement continues upwardly, the rollers 76 engage the cam surfaces 62 which force the upper ends of the cores 2-3 and 25 inwardly and the lower ends thereof outwardly in the manner illustrated in Fig. 4, thus freeing the cores 24 and 25 from the casting; whereupon continued upward movement of the slide 59 will cause the cast slider I 0 to be stripped from the core 22 by the stripper 83 and the slider will drop into a suitable receptacle or may, by means known in the art, be fed to a trimming station. After the casting has been removed from the core 22, the slide 59 is again moved downwardly, in which operation, the spreader 19 again returns the cores 24 and 25 to their closed position, as seen in Fig. 1, the core 22 moving onto the core 23; whereupon the dies 20 and 2| are again closed and the next successive casting is then formed. It will be apparent that the entire operation is automatic and, with an apparatus of the kind under consideration, substantially finished sliders can be produced at a high rate of speed.

Having fully described my invention, what I claim as new and desire to secure by Letters Patent is:

1. In a die casting machine, the combination of a frame, a pair of movable dies mounted in the frame, said dies having opposing faces defining a, casting cavity and being movable into and out of engagement with each other, the frame having a portion on the parting line of said movable dies when the dies are in closed position, said portion of the frame having a channel therein, a slide movably mounted in said channel, said slide being movable relative to the frame and at right angles to the movement of the movable dies between a stripping position and a casting position, a core member pivotally supported on the slide, said core member being movable with the slide and having an upper and a lower end, a pin projecting from one face of the core member at the lower end thereof, said lower end of the core member and the pin being disposed between the opposing faces of the movable dies in the casting position of the slide and forming a part of the casting cavity therewith, cam means on the frame engaging with and pivotally moving the core member with respect to the slide upon movement of the slide from the casting position iii) (iii

to the stripping position thereof and means engaging with and holding the core member against movement with respect to the slide at the casting position thereof.

2. In a die casting machine, the combination of a frame, a pair of movable dies mounted in the frame, said dies having opposing faces defining a casting cavity and being movable into and out of engagement with each other, the frame F having a portion on the parting line of said movable dies when the dies are in closed position, said portion of the frame having a channel therein, a slide movably mounted in said channel, said slide being movable relative to the frame and at right angles to the movement of th movable dies between a stripping position and a casting position, a core member pivotally supported on the slide and movable therewith, said core member being movable with the slide and having an upperand a lower end, a pin projecting from one face of the core member at the lower end thereof, said lower end of the core member and the pin being disposed between the opposing faces of the movable dies in the casting position of the slide and forming a part of the casting cavity therewith, a cam surface on the channel of the frame, said cam surface engaging with the upper end of the core member at the stripping position of the slide and pivotally moving the core member with re spect to the slide upon movement of the slide from the casting position to the stripping position thereof and a spreader bar secured to the frame, said spreader bar engaging with the upper end of the core member and holding the core member in a fixed position relative to the slide at the casting position of the slide.

3. A die casting machine of the type having a frame, a pair of movable dies mounted in the frame, said dies having opposing faces defining a I casting cavity and being movable into and out of engagement with each other, which is characterized by the frame having a portion on the parting line of the dies, said portion of the frame having a channel therein, a slide movably mounted in said channel, said slide being reciprocable in said channel at right angles to the movement of the movable dies between a stripping position and a casting position, a pair of core members pivotally supported on the slide, said core members having upper and lower ends, a pin projecting from one face of each of the core members at the lower ends thereof, said lower ends of the core members and the pins being disposed between the opposing faces of the movable dies and extending into the casting cavity defined thereby at the casting position of the slide, cam means on the frame engaging with and pivotally moving said core members with respect to the slide upon movement of the slide from the casting position to the stripping position thereof and means engaging with and holding each of the core members a fixed position relative to the slide at the casting position thereof.

4. A die casting machine of the type having a frame, a pair of movable dies mounted in the frame, said dies havingopposing faces defining a casting cavity and being movable into and out of engagement with each other, which is character ized by the frame having a portion on the parting line of the dies, said portion of the frame having a channel therein, a slide movably mounted in said channel, said slide being reciprocable in said channel at right angles to the movement of th movable dies between a stripping position and a casting position, a pair of core members pivotinto the casting cavity defined thereby at the tasting position of the slide, cam surfaces on the channel in the frame, said cam surfacesengaging with the upper ends of the core: members'and piv- -otal1-y'moving the core member on theslide upon movement of the slide from th casting position "to the stripping position thereof and a spreader bar secured to the frame and extending between the upper ends of the core members, said spreader bar engaging with the upper ends of the core members and holding the core members in a'iixed position relative to the slide at the casting position of the slide.

5. A die -casting-machineof the type having a frame, a pair or movable dies mounted in the frame, said dies havingopposing faces defining 'a casting cavity and being movable into and out of engagement with each other, which is characterized by the frame having a portion on the parting line of the dies, said portion of the frame having a channel therein, a slide movably mounted in said channel, said slide being reciprocable in said channel at right angles to the movement of "the movable dies between a stripping position and a casting position, a core memoer pivotally mounted on the slide, said pivoted core member having an upper and a lower end, a pin projecting from one face of th core member at thelower end thereof, the lower end of said core member and the pin being disposed between the opposing faces of the movable dies and extending into the casting cavity defined therebyat the casting position of the slide, a second core member carried by the slide, said second core member being fixed relative to the slide and'having a lower end extending into the casting cavity defined by the opposing faces of the movable dies at the casting position of the slide and cam means on the frame engaging with and moving the pivoted core member relative to the slide upon movement of the slide from thecasting position to the stripping position thereof.

LOUIS H. MORIN.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 1,984,189 Hofiman et a1 Dec. 11, 1934 2,104,620 Long Jan. 4,.1938 2,124,529 Lester et a1 July 26,1938 2,209,413 Marinsky July 30, 1940 2,367,303 Morin Jan. 16, 1945 2,367,962 Reibold et a1 Jan. 23, 1945 2,487,359 Natzler Nov. 8, 1949 2,519,171 Bolten Aug. 15,1950

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