US1394246A

US1394246A - Die-casting ejector

Info

Publication number: US1394246A
Application number: US351639A
Authority: US
Inventors: Bolling Baltzar Emanuel
Original assignee: Individual
Current assignee: Individual
Priority date: 1920-01-15
Filing date: 1920-01-15
Publication date: 1921-10-18
Anticipated expiration: 1938-10-18

Description

B. E. BOLLING..

' DIE'CA STING ETIECTOR.

APPLICATION FILED JAN-15, I920.

1,394,24 Patented 001;. 18, 1931.

UNITED STATES PATENT OFFICE.

BALTZAB EMANUEL ROLLING, 0F RACINE, WISCONSIN.

DIE-GASTIN G EJ'ECTOR.

Specification of Letters Patent.

- Application filed January 15, 1920. Serial No. 351,639.

scription, peference being had to the accompanying drawings, which are specification.

This invention relates to improvementsin die casting ejector for a die casting machine.

In the ordinary die casting mach ne many of the castings are broken in ejecting them from the molding die parts or sect ons due to the unequal strains placed on the castings in forcing them outof the dies. This loss materially increases the enpense of the perfect casting and is otherwise ob ect onable in limiting the output of the machine.

It is one of the objects of the present invention to overcome the before mentioned objectionable features and provide a die casting ejector which will exert an equal strain upon different portions of the-casting in ejecting it from the mold part and thus eliminate the larger part of the breakage and increase the capacity of thecastmg machine.

A further object of the invention is to provide a die casting ejector in which means are provided for positively-positioning the ends of the ejector pins with relation to the recess of the molding die to prevent the marring of the casting by said pins.

A further object of the invention is to provide a die casting ejector in which the die ejecting means is moved upwardly while the die art is moved downwardly to positively e ect the casting.

A further object of the invention is to provide a die casting ejector in which the ejector pins and the stop pins are maintained in proper alined position to prevent tilting and unequal strains u on the casting while ejecting it from the die parts.

A further object of the invention is to provide a die casting ejector in which the ejector parts may be easily changed; and other parts substituted therefor. to eject castings of various shapes and sizes;

A further object of the invention is to provide a die casting ejector which is of simple construction, is strong and durable a part of this and is well adapted for scribed.

With the above and other objects in view, the invention consists of the improved die castmg'ejector and its parts and combinatlons as set forth in the claims, and all equivalents thereof.

In the accompanying drawing in which the same reference characters indicate the same parts in all of the views:

Figure 1 is a central vertical sectional view of a portion of a die casting machine prgvided with the improved casting ejector; an

Fig. 2 is a transverse sectional view thereof taken on line 2-2 of Fig. 1.

the purpose de- Referring to the drawing, the numeral 5' indicates a portion of a die casting machine in which 6 is a vertical reciprocal head or table, '7 the ejector plunger head and 8 the die block mounted on the head. The reciprocal head 6 slides in the bearings 9 of the machine frame and the die block 8 is adjustably mounted on the upper portion of the head in any manner desired. The head 6 is formed with a rectangular recess 10 and the die block 8 is provided with ver- Patented Oct. 18, 1921.

tically extending central opening 11 of rectangular shape which registers with the recess 10 to accommodate the ejector plunger head 7. A casting die part 12 having a casting recess 13 in its upper portion is mounted on top of the die block 8 and coacts with a companion die part 14 carried by a fixed head (not shown) of the machine. This upper die part 14 is also provided with a recess 13 in register with the recess 13 and forming space therewith in which the casting is molded' The molten metal to the die space is fed through the opening 15 formed between the two die parts. The lower die part 12 is also provided with vertically extending ejector. pin holes 16 and stop pin holes 17 for receiving ejector pins 18 and stop pins 19 respectively, which extend slidably therethrough. The lower headed ends of the pins are mounted between and securely fastened to plates 20 which rest loosely upon the ejector plunger head 7 so that when the reciprocal head 6 is moved downwardly to separate the die parts, the lower die part will first separate When the casting has been discharged, the lower die part is moved upwardly, and the stop pins, which project upwardly through the upper die part, will engage the lower face of the upper die and be held in. position while the lower die is moved into engagement with the upper die, and thus exactly position the upper ends of the ejector pins with relation to the upper surface of the recess of the lower die part. The upper surface of the ejector plunger head 7 is perfectly flat and the lower surface of the lower pin plate is likewise and as the plates are held on the plunger head by the stop pins, the ejector pins will be maintained in alined position with relation to the ejector pin holes and prevent tilting the casting in ejecting it from the die.

The ejector plunger head is mounted on the upper end portion of a plunger stem 21 which. extends vertically through spaced bearings 22 and :23 forming part of the reciprocal head 6. A lever 24 having a slot 925 formed in its outer end is pivotally slidably connected said end to the reciprocal head by a bifurcated pivot bolt 26. The inner end said lever is bifurcated and straddles a medial portion the plunger stem 21 and pivotally connected thereto by a pivot bolt 2?. A tubular sleeve 28 pivotally connected at its upper end to a medial portion of the lever 24- extends downwardly therefrom and telescopes over the upper end portion oi. an upstanding threaded rod 29 which is pivotally connected at its lower end to the base portion 30 of the machine or to the floor. Nuts 31 adjustably threaded on the rod 29 limit the downward movement of the sleeve 28 so that when the reciprocal head moves downwardly a predetermined distance to separate the lower die part from the upper die part, the downward movement of the ejector parts will be stopped when the sleeve strikes the nuts and a farther downward movement of the reciprocal head will force the inner end of the lever and the plunger and the pins upwardly to positively discharge the casting from the lower die part as before described.

From the foregoing description, it will be seen that the die casting ejector is of very simple construction and is well adapted tor the purpose described.

llfhat ll claim as my invention is:

l. The combination with a die casting machine having va reciprocal head carrying a die part provided with ejector openings.. of means for positively ejecting castings from said die part, comprising means extending into said openings and movable therethrough after said reciprocal head has reciprocated a predetermined distance.

2. The combination with a die casting machine having a reciprocal head carrying a die part provided wtih ejector pin openings,

intense of means for positively ejecting castings from said die part, comprising an ejector plunger reciprocally carried by the head and having pins which extend into the die part for forcing a casting out of the die part, an automatically moved lever controlling the movement of the ejector plunger, and other means operated by movement of said-head for automatically controlling the movement of the lever.

3. The combination with a die casting machine having a reciprocal head carrying a die part provided with ejector pin openings, of means for ejecting castings from said die part, comprising an ejector plunger reciprocally carried by the head and having pins which extend into the die part for forcing a casting out oi the die part, an automatically moved-lever pivotally connected to the reciprocal head to the ejector plunger and means automatically controlling the movement of the lever i. The combination with a die casting machine having a reciprocal head carrying a die part provided with. ejector pin openings. of means for ejecting castings from said die part comprising ejector plunger reciprocally carried by the head and having pins which extend into the die for forcing; a casting out of die part an automatically moved lever pivotally connected to the reciprocal head and to the ejector plunger., and means connected to the lever and to a support for automatically limiting the movement of a portion of the lever to cause another portion thereof to move in the opposite direction when the reciprocal head has moved a predetermined distance to separate die parts.

5. The combination with a die casting ma chine having a fixed die portion and a reciprocal head carrying a die part provided with ejector pin and stop pin openings, of means for ejecting castings from said parts, comprising an ejector plunger reciprocally carried by the head, a plate mounted on the plunger and having projecting stop pins which extend through the stop pin openings and engage the tired die part and also having ejector pins which extend through the ejector pin openings and engage the casting formed between the die parts an automatisally moved lever pivotally connected to the reciprocal head and to the ejector plunger, and means connected to the lever and to a support for automatically limiting the movement'oi a portion of the lever to cause another portion thereof to move in the opposite direction and force the pins through the die part when the reciprocal head has moved a predetermined distance to separate the die parts.

6. The combination with a die casting machine having a fixed die portion and a reciprocal head carrying a die part provided with lid ejector pin and stop pin openings, of means for ejecting castings from said parts, comprising an ejector plunger reciprocally carried by the head, a plate mounted on the plunger and having projecting stop pins which extend through the stop pin openings and engage the fixed die part and also having ejector pins which extend through the ejector pin openings and engage the casting formed between the die parts, an automatically moved lever pivotally connected to the reciprocal head and to the ejector plunger, 1

a member pivotally connected to the lever, another member connected to a support and slidably connected to the last mentioned member, and means automatically limiting the slidable movement between said members for stopping the movement of a portion of.

the lever to cause another portion thereofto move upwardly and force the pins through the die part when the reciprocal head has moved a predetermined distance to separate the die parts.

7. The combination with a die casting machine having a fixed die, portion and a reciprocal head carrying a die part provided with ejector pin and stop pin openings, of means for ejecting castings from said parts,

comprising an ejector plunger reciprocally carried by the head, a plate mounted on the plunger and having projectlng stop plns which extend through the stop pln openlngs and engage the fixed die part and also having ejector pins whcih extend through the ejector pin openings and engage the casting formed between the die parts, an automatichine having a fixed die portion and a reciprocal head'carrying a die part provided with ejector pin and stop pin openings, of means for ejecting castings from said parts, comprising an ejector plunger reciprocally-carried by the head, a plate mounted on the plunger and having projecting stop pins which extend through the stop pin openings and engage the fixed die part and also having ejector pins which extend through the 8. The'combination with a die casting mae ector pin openings and engage the casting formed between the die parts, an automatically moved lever pivotally connected to the reciprocal head and to the ejector plunger, a tubular member pivotally connected to the lever, a threaded rod pivot-ally connected to a support and extending into the tubular member, and a nut threaded on the rod for automatically limiting the movement of the sleeve with relation to the rod.

ture.

"BALTZAR EMANUEL ROLLING.

In testimony whereof, I aflix my signa- I