Патент USA US2137539код для вставки
lNvEN-roR Fay E. MCI/7 fos/2 BY i ' ATTORNEYS -Nov. 22, 1938. > R E, MclNTOsl-l 2,137,539 APPARATUS FOR DIE CASTING ARTICLES ' Filed'Jan. 5o,A 1937 2 sheets-sheet 2 @L ?0 27 INVENTOR ' Foy E. /V/c Infos/2 BY m AT'TokìEYs l Patented Nov. 22, 1938 . 2,137,539 _UNITED STATES PATEN'r` OFFICE 2,137,539 _ APPARATUS Foa DIE CASTING ARTICLES Roy E. McIntosh, New York, N. Y., assignor to Star Expansion Bolt Company, New York, N. Y., a corporation oi.' Illinois ^ Application January 30, 1937, Serial No. `123,184 2 Claims. (Cl. 22-94) This invention relates to an apparatus for die illustrated in the drawings there is shown in casting articles having internal threads therein. More particularly stated, the invention relates Fig. l a machine comprising a base I Il _on which is supported a die Il, the details of which are to an apparatus for die casting and vejecting illustrated in Figs. 2 and 3, the die being closed 5 from the die a group of articles, such as nuts, internally threaded caps, or internally threaded expanding elements for expansion anchors. When such articles are to be cast, the mold has » positioned therein a threaded core pin and the 10 metal is forced under pressure into the mold and around the pin. In the methods heretofore used, after the casting has set, the pin is threaded out of the article and the article is ejected by an ejector pin or other 'suitable means which is 15 usually moved through the core and _forces the cast article from the die. 'I’his invention has for its salient object to provide a simple and practical apparatus for by a cover I2. The molten metal for the die is 5 forced under pressure from a receptacle or pot I3 through a conduit i4 into the die mold II. 'I'he cover I2 is held- in closed position by a plunger I5 having a. piston I8 on one end disposed in a pneumatic .cylinder I1. A « 10 The die mold II is constructed in the manner shown in Fig. 4, with a gate 20 through which the molten metal enters the mold. The gate 20 communicates with a groove 2| which `forms a conduit for conducting the metal around the l5 mold and to laterally extending -conduits which communicate _with the die cavities 23 in which the cast articles are formed. -In each of the cavities 23 there is disposed a cast article and ejecting the article from the mold. threaded core pin 24 and each core pin has a 20 Another object of the invention is to provide . rearwardly extending spindle `25 formed thereon, simple and practical means whereby the opening to which is secured a gear 26. of'a die casting mold or the removal of the die The gears 26 mesh with a centrally disposed~ cover therefrom will automatically set in opera' `gear 21 mounted on a shaft 28 supported in ver simultaneously withdrawing a core pin from the 25 tion means whereby the core pin will be removed from the mold and the article will be ejected therefrom. Further objects of the invention will appear from the following specification taken in con 30 nection with the drawings which form a part of this application, and in which Fig. 1 fis an elevational view of apparatus con structed in accordance with the invention and adapted for use in carrying out the method; Fig. 2 is a sectional elevation through the die, the die being closed; ^ Fig. 3 is aviewsimilar to Fig. 2 but illustrating the die with the cover removed and the die cast ing ejected; l Y . ' Fig. 4 is an elevational view of the die mold; a'nd Fig. 5 is an elevational view of the die casting formed in the mold. The invention briiiy described consists of a ` i method of die casting a plurality of threaded articles in a group and of simultaneously sep arating the core pins and articles and >ejecting the casting from the mold after the casting has set. The invention further consists in apparatus i for carrying out this method and in apparatus for simultaneously opening the die and ejecting the casting therefrom: “ Y Further details of the invention will appear from the following description. In the particular embodiment of the apparatus tically extending portions 29 and_30 of the base 25 III. The front end of /the shaft 28 is mounted in ball bearings 3|. A pulley 35 is rotatably mounted on the shaft 28 and is driven in any suitable manner, as by a belt 36. 'I'he pulley 35 forms `a ily wheel and 30 has secured thereto a plurality of clutch pins 31 which are adapted to seat in sockets 38 of a shiftable clutch member or yoke 39 which is keyed to the shaft 28. When the clutch member 39 is shifted to the left viewing Fig. l the pins 31 will 35 enter the recesses 38 and the shaft will be driven by the ily wheel 35. The clutch yoke 39 is engaged by a clutch shifting lever 40 pivoted on a iixed pivot 4I and having its lower end connected by a. link 42 to 40 a lever 43. Lever 43 has a fork 44 at its lower end in which is positioned a fixed pin 45. The -upper end of the Vlever 43 is pivoted at 4.6 to th die cover or closure I2. . > ~ In order to facilitate the stopping of the shaft 45 28 when the clutch is thrown out, a brake 50 of any suitable construction is mounted on the base III and frictionally engages a pulley 5I mounted on the left hand end of the shaft 28 viewing Fig. l. 50 Operation When the casting is to be formed the parts are disposed in the position illustrated in Figs. 1 and 2,.with the die cover I2 closed and heldin closed y 2 position by the plunger l5. The metal is then prising a stationary die having a plurality of mold cavities, means for closing the die, rotat able threaded core pins in the _mold cavities in said stationary die, means for rotating said pins the clutch yoke 38 to the left, connecting the ñy in a direction to eject the cast articles from the wheel 35 to the shaft 28. The ñy wheel is ro- ` mold cavities of the stationary die, means for tated in such a direction that the gears 26 will moving said die closing means to open and closed be rotated in a direction to cause the rotation positions, and means connected to said moving of the threaded core pins 26 to eject the cast means for setting said pin rotating means in op 10 ings from the molds or cavities 23. Thus, the eration when the die is opened. core pins and castings will be separated and at 2. Apparatus of the character described com the same time the die casing will be ejected from prising a stationary die, a closure for the die, ro the die. tatable threaded core pins in the die cavities of Although one speciñc embodiment of the in the die, a power shaft for rotating said pins in 15 vention and one particular form of apparatus has a direction to eject the casting from the die cavi 15 been illustrated, it will be understood that ties of the stationary die, a clutch between the changes in the construction and in the arrange shaft and pins, means for opening and closing ment of the various parts may be made and that .the die closure and operative connections between the method may be carried out by modiñed forms said closing means and said clutch so arranged 20 of apparatus without departing from the spirit that the clutch will be thrown in when the closure 20 or scope of the invention, as expressed in the fol operating means is actuated to open the die. forced into the mold under pressure and there after the plunger l5 is moved to the right open ing the die mold and at the same time shifting lowing claims. What I claim is: _ 1. Apparatus of the character described com ROY E. MCINTOSH.