US2522866A

US2522866A - Die casting machine

Info

Publication number: US2522866A
Application number: US44150A
Authority: US
Inventors: Gash Frederick
Original assignee: William Coulthard & Co Lt
Current assignee: William Coulthard & Co Lt; William Coulthard & Co Ltd
Priority date: 1947-09-27
Filing date: 1948-08-13
Publication date: 1950-09-19
Anticipated expiration: 1967-09-19

Description

Sept. 19, 1950 Fild Aug. 13, 1948 F/G/Q Z l/ I2 I I I 15 I I -l0" I I I0 I I 2 I I I I I 3 Shaves-Sheet l Inventor Sept. 19, 1950 F. GASH DIE CASTING MACHINE s Sheets-Sheet '2 I Filed Aug. 13, 1948 F/GZ 33 I, a K

s- I I 22 ,r 2/5 H F): P

I Inventor, FREDERICK GASH By A ltorney Sept. 19, 1950 s 2,522,866

DIE CASTING MACHINE Filed Aug. 13, 1948 3 Sheets-Sheet 3 Inventor rRE'DERI CK 6 A S H Attorney Patented Sept. 19, 1950 UNITED STATES PATENT OFFICE DIE. CASTING MACHINE Frederick Gash, Carlisle, England; assignor to William Coulthard & Company Limited, Garlisle, England, a British company Application August 13, 1948, Serial No. 44,150 In Great Britain September 27, 194'? 3 Claims. 1 This invention is for-improvements in or relating to die-casting, moulding or like machines of the kind (hereinafter called the kind specified) comprisinga device known as a gooseneck or the like the metal or other material being forced through the gooseneck and injected into the dies. In one such machine of this kind the throat part of the gooseneck'and a plunger or piston which works therein and acts to -force the-metal through the gooseneck and into the dies, are immersed in a pot containing the molten metal or other mate rial from which the castings are made.

Onecbject of the present invention is to provide an arrangement for securing or locating the gooseneck on the machine, which arrangement will not seriously interfere with expansion and contraction of-the gooseneck under changes of temperature.

A further object of the present invention isto provide a mounting arrangement for the gooseneck which facilitates the location of the gooseneck in correct alignment with other partsof the machine.

Heretofore, it has beenthe practice to mount and support the gooseneck such a-manner that no satisfactory facilities are available for read.- ilycentering or aligning said. .gooseneck correctly with respect to its .associated parts-10f themachine. One arrangement used heretofore consists of two clamping set-screws adapted to fit into dimples machined in the gooseneck Wings. With such an arrangement difficulty is inevitably experienced in obtaining the correct alignment of the gooseneck if there is the slightest error in the machining of the dimples. Furthermore, this i) arrangement does not permit the desired free expansion and contraction of the gooseneck under changes of temperature.

According to the present invention the gooseneck is secured or located on the machine by .resilient means which will allow for expansion tion provides a die-casting machine or the like I of the kind specified and of the plunger type, wherein means is provided for adjusting the gooseneck or equivalentor like device in at least two directions at right angles to one another; and in a common horizontal plane normal totheaxis of the piston or plunger so that the part of the gooseneck which receives said piston or plunger can be set in alignment therewith.

Conveniently, the locating device includes a resilient part adapted to allow for relatively free expansion and contraction of the gooseneck under changes of temperature such asobtained in diecasing machines.

One specific embodiment of the invention will now be described, by way of example, with reference to the accompanying drawings. On the drawings Figure l is a perspective elevation of a die casting machine of well known form but incorporating the improvements according to the present invention,

Figure 2 is a transverse sectional elevation of the machine shown in Figure 1 the section being taken through the metal pot and gooseneck hereinafter-referred to,

Figure 3 is a fragmentary sectional elevation on the line III-III of Figure 2,

Figure 4 is a fragmentary elevation to an enlarged scale of the gooseneck aligning means Viewed in the direction of the arrow IV in Figure 3, and

Figure 5 is a fragmentary plan view of the gooseneck aligning means, the view being taken in the direction of the arrow V in Figure 3.

The machine shown in Figure l of the draw-- ings is similar in most respects to various known forms of die-casting machines of the kind concerned except as regards the means provided for effecting correct alignment and location of the gooseneck with respect to its associated parts of the machine.

Briefly, the machine shown in Figure 1 of the drawings comprises a frame in supporting the dies H (see Figure 2), the dies being opened and closed in the usual way, say, by a hand-wheel l2 orby pressure fluid operated means. I3 indicates the-pot for the molten metal which, together with the heating means i i forms the furnace assembly. This assembly is pivoted at I5 on the machine frame and is adapted to be rocked about its pivotal support it automatically with the closing of the dies in the usual way so as to bring the nozzle ll of the gooseneck is (see Figure 2) into register with the sprue I9 of the dies II when a shot or die-casting operation is to be effected. The gooseneck I8 is formed with a cylinder 20 immersed in the molten metal in the pot I3 and having a port 2| through which the molten metal flows intothe cylinder 25!. A plunger 22 works in the cylinder 20 in the usual way to injectthe molten metal, via the gooseneck and sprue opening it, into the dies. The plunger 22 is operated by an air piston and cylinder device 23 (see Figure 3) mounted on an air cylinder support 24 which is supported in turn on the furnace assembly and is bolted thereto by means of bolts 25 (see Figures 1 and 4). The gooseneck I8 is supported by its lugs or wings 26 (see Figure 3) which rest on the upper face of the metal pot l3 and pass through arches 21 in the lower part of the air cylinder support 23, as shown more particularly in Figures 1 and 4. The lugs or wings 26 of the gooseneck are held down on the upper up of these clamping bolts the gooseneck has to be adjusted so that the cylinder is in correct alignment with the plunger 22 and other associated parts of the machine. To eiiectadjustment of the gooseneck laterally, there is provided, for the purpose of the present invention, two inverted L-Shaped brackets 29, positioned on diametrically opposite sides of the gooseneck one adjacent each gooseneck wing, as shown more particularly in Figures 1 and 3. The brackets 29 are made of steel or like resilient material and are secured to the air cylinder support 24 by the studs or bolts 25 which, as stated above, serve to secure the air cylinder support to the furnace assembly. The vertical part of each of the brackets 29, is fitted with an adjusting screw 3| the forward end of which bears on the neighbouring vertical edge of the gooseneck wing. Nuts 32 are provided on the adjusting screws 3| for locking them in their position of adjustment. In addition to the aligning screws 3| just described, the usual adjusting screws 33 are provided (see Figure 2) for adjusting the gooseneck towards and away from the sprue of the dies (sufficient clearance being provided in the arches 21 to enable this to be done) and also for taking the thrust of the gooseneck, the screws 33 being screwed through the air cylinder support 24. Thus, the gooseneck is adjustable in two directions at right-angles and in a common horizontal plane.

By adjusting the screws 3! and the screws 33 adjustment of the gooseneck, Where necessary, can be effected in both directions in the horizontal plane so as to bring the cylinder 2i] of the gooseneck into precise alignment with the plunger or piston 22 and allow a free movement of the latter in the cylinder. After the necessary adjustment has been made, the locating screws El and 33 are locked in position so as to maintain correct location of the gooseneck and the clamping screws 28 are tightened down.

In the direct air type of machine it is convenient to secure the brackets '29 to the metal pot cover.

Trouble has been experienced in the past due to the bore 26 of the gooseneck not being easily alignable with the piston or plunger 22 and the axis of the air cylinder 23. The L-shaped bracket arrangement just described makes it possible to align the gooseneck with the piston or plunger and its other associated parts of the machine, quickly and easily. This is of great advantage to the user of the machine when a new gooseneck has to be fitted. Furthermore, there is a certain amount of spring inherent in the L-shaped brackets, which should be made from a suitable material, to allow for any difference in expansion or contraction between the gooseneck and its associated parts of the machine, due to temperature variations between the various parts. This overcomes the objection referred to above regarding the matter of relatively free expansion and contraction of the gooseneck. This feature of the invention makes the invention applicable to the direct air type of machine as well as the plunger type. In the former type the invention is of advantage because it allows for expansion and contraction of the gooseneck across the gooseneck lugs or wings 26.

' I claim:

1. In a die-casting machine of the type having a sprue opening for the dies, a furnace assembly including a melting pot, a gooseneck having an outlet nozzle for cooperation with said sprue opening and including a throat part in communication with said nozzle and positioned in said melting-pot by lateral wings on opposite sides thereof and resting on the opposite sides of said furnace assembly, a piston device for operating a plunger in said throat and including a support mounted in fixed relation on said furnace assembly and carrying adjustable screw devices in engagement with the sides of said lateral wings for adjusting the gooseneck nozzle toward the sprue opening, and means for clamping the gooseneck to said furnace assembly in adjusted position, the improvement which comprises a horizontally disposed adjustable screw device supported in fixed relation on each side of said furnace assembly and in engagement with the end or" the adjacent lateral wing for adjusting the gooseneck nozzle laterally with respect to said sprue opening.

2. In a die-casting machine of the type having a sprue opening for the dies, a furnace assembly including a melting pot, a gooseneck having an outlet nozzle for cooperation with said sprue opening and including a throat part in communication with said nozzle and positioned in said melting-pot by lateral wings on opposite sides thereof and resting on the opposite sides of said furnace assembly, a piston device for operating a plunger in said throat and including a support having arched feet mounted in fixed relation on opposite sides of said furnace assembly with said feet straddling said lateral wings and carrying horizontally disposed adjustable screw devices in engagement with the sides of said lateral wings for adjusting the gooseneck nozzle toward the sprue opening, and means for clamping the gooseneck to said furnace assembly in adjusted position, the improvement which comprises an inverted L-shaped bracket supported by each of said arched feet and having a resilient downwardly extending limb in front of and parallel to the end of the lateral wing straddled by the respective foot, and a horizontally disposed adjustable screw device supported by each of said depending limbs and in engagement with the end of the respective lateral wing for adjusting the gooseneck nozzle laterally with respect to said sprue opening.

3. In a die-casting machine of the type having a sprue opening for the dies, a furnace assembly including a melting pot, a gooseneck having an outlet nozzle for cooperation with said sprue opening and including a throat part in communication with said nozzle and positioned in said melting-pot by lateral wings on opposite sides thereof and resting on the opposite sides of saidfurnace assembly, a piston device for operating a plunger in said throat and including a support mounted in fixed relation on said furnace assembly and carrying adjustable screw devices in engagement with the sides of said lateral wings for adjusting the gooseneck nozzle toward the sprue opening, and means for clamping the gooseneck to said furnace assembly in adjusted 5 position, the improvement which comprises a resilient support in fixed relation on each side of said furnace assembly, and a horizontally disposed adjustable screw device carried by each resilient support and in engagement with the end of the adjacent lateral wing for adjusting the gooseneck nozzle laterally with respect to said sprue opening,

FREDERICK GASH.

6 REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,458,482 Grey June 12, 1923 10 2,000,488 Korsmo May '7, 1935 2,145,448 Lester Jan. 31, 1939 2,262,338 Schultz Nov. 11, 1941