US1484423A

US1484423A - thompson

Info

Publication number: US1484423A
Authority: US
Publication date: 1924-02-19
Anticipated expiration: 1941-02-19

Description

Feb. 19 1924.

J. S. THOMPSON BRAKE SHOE MOLD 2 Sheets-Sheet 1 Filed July 2,0, 1923 ATM Feb. 19 1924. 1,484,423

J. s. THOMPSON BRAKE SHOE MOLD Filed Jul 20. 1923 2 Sh eetS-Sheet 2 Patented Feb. 19, 1924.

UNITED STATES JAMES S. THOMPSON, 013 IELHAM, NEW YORK.

BRAKE-SHOE MOLD.

Application filed. July 20,

To all whom it may concern:

Be it known that I, JAMES S. Tnourson', a citizen of the United States, residing at Pelham, in the county of Westchester and State of New York, have invented certain new and useful Improvements in Brake- Shoe Molds, of which the following is a specification.

This invention relates to the manufacture of brake shoes, and its object is broadly to facilitate the manufacture of brake shoes in permanent molds by providing a mold which can be easily and quickly opened and closed, so that the casting operation can be economically erformed.

Another ob ect of the invention which is closely related to the broad general object is to provide a simple means for supporting theattaching lug, the core therefor, and the reinforcing back for the shoe in the mold cavity, preliminary to the casting operatmn so that they will be properly posltioned with relation to the shoe body.

And a still further object of the invention is to enable the assembly of the attaching lug, the core therefor and the reinforcing back as a unit so that it can be handled without danger of disarrangement, and easily inserted in its proper position in the mold cavity, to be held therein by the conformation of the mold cavity and without the necessity of employing any external means.

In the accompanying drawings illustrating selected embodiments of the invention- Fig. 1 is a central sectional view on the line 1--1 of Fig. 2.

Fig. 2 shows the mold of Fig. 1 partly in elevation and partly in longitudinal section.

Fig. 3 is a horizontal sectional view on the line 33 of Fig. 2.

Fig. 4 is a perspective view showing a portion of the drag in section, and one member of the cope in elevation.

Fig. 5 is a transverse sectional view corresponding to Fig. 1, but showing a slightly modified construction.

Referring to the drawings, the mold comprises a hinged bottom member 6, a relatively fixed upper member 7, and a slidable upper member 8. The hinged lower member 6 corresponds with the usual drag and the two up

er members

7 and 8 correspond with the usual cope, and I will use this form of escription in referring to these parts. The

1923- Serial No. 652,771.

drag member 6 is hinged at 9 to swing freely down from the

cope members

7, 8, and to this end it may be provided with lugs 9 to be engaged by a hinged bar 10 with ugs 11 on the relatively stationary member 7. The cope member 8 is slidable relatively to the fixed member 7 and the drag member 6, and it is provided with ears 12 which are bored to receive the guide rods 13 supported on the fixed member 7. The drag member 6is provided with one or more tongues 14 projecting forward to engage keepers 15 mounted on the slidable member 8. Pins 16 are removably engaged with the keepers 15 to cooperate with the tongues 14 for holding the bottom or drag member 6 in operative position. This can be accomplished with out removing the pins 16 by swinging the drag member up to its operative position and then pushing the sliding member into its operative position, during which latter movement the keepers will engage the tongues; but the pins may be removed and the sliding member pushed into operative position and then the drag member swung up to its operative position, after which the pins will be inserted to hold the drag member in place.

I also. prefer to provide one or more clamping bars 17 for securing the

members

7 and 8 of the cope together during the casting operation. These bars may be conveniently pivoted at 18 to the fixed member 7 and provided with hooked ends 19 carrying set screws 20, whereby they may be easily adjusted and secured in place. When the mold is closed the two members of the cope will be held rigidly clamped together, and the drag member will be held rigid in its proper relation to the cope. It will be observed that the means for assembling and locking the members of the mold in position for casting, and for releasing the members to open the mold, are of simple character, easily manipulated and of a substantial and eflicient construction.

The mold cavity 21 is formed in the cope and this is possible because the cope is made in two members, 7 and 8, one of which is slidable relative to the other to permit the removal of the casting easily from the fixed member. I prefer to recess the top wall of the drag member slightly to form the bot-- tom wall of the mold cavity, because the edges of the brake shoe at the wearing face are preferably rounded; and a better joint can be made between the bottom wall and the side walls of the mold cavity in this way, but this recessing of the drag member would not be necessary if the casting had square edges and the top wall of the drag provided with

refractory sections

24, 25 in the mold cavity walls, so that the metal drag and the metal copomay produce chilled areas atthe ends of the shoe while those portions of the shoe opposite the refractory sections will be protected from chilling. The refrac tory material may be supplied. in the form of a refractory coatinginstead of in the form of inserted sections, as shown, and changes may be made in the form, location and construction of the refractory material to accommodate shoes of different types and sizes and to produce other integral composite structures.

Each of the members '2' and 8 constitutes a longitudinal section of the mold, and in the face of each member a portion of the mold cavity is formed. In the particular construction illustrated in Figs. 1%, about one-half of the mold cavity is formed in each of the cope members Yand 8, whereas in the construction of Fig. 5 a little more than one-half of the mold cavity is formed in the cone section 7 than in the cope section 8. The mold cavity comprises a space in the scope for the accommodation of the steel attaching lug and the'core to form the opening therethrough, and this space comprises the recess 26 for the lug 27 and the lateral extensions 28 of said recess 26 for the ends of the core 29. One-half or thereabouts of the recess 26 and its extensions 28 is located in the face of the cope section 7 and the other half or thcreabouts is l0- cated in the face of the cope section 8, and this enables the unitcomprising the steel lug 27, the lug core 29 and the reinforcing back 30 to be assembled with the mold member by placing it in that portion of the recess 26 and its extensions formed in the cope member 7, where it will be sup ported while the other members of the mold are being adjusted to close the mold. The ends of the lug core 29 are preferably shouldered at 81 to engage complementary shoulders 32 in the cope members. When the steel lug, lug core and reinforcing back as a unit are inserted in the cope member 7, it will be supported by the ends of the lug core resting in the half of the recess extensions 28 in the cope member 7, the shoulders of the core resting upon the shoulders of the cope member, to support said unit while the' other members of the mold :1. ,aeaeaar lug 2? so hot around an i over the lug 27, as will be clearly understood from rgs. 1 and-2, but this may be changed if it is not desired to have the metal flow over or around the lug.

To hold the reinforcinghack in its proper relation with the lug and the lug core, I prefer to tie the back to the core by wires which, in the embodiment illustrated, pass around the back and the core on opposite sides of the lug and are twisted together to secure the parts against relative movement. This simple arrangement enables the lugythe lug core and the reinforcing back to he assembled and unitedin a unit which can be easily handled and inserted in the mold, and which will insure proper positioning of the parts in the shoe 7 casting. If the wiresare not destroyed in the casting 0 thereof can be easily removed after the shoe peration, any projecting parts has been discharged fromthe mold. By supporting the reinforcing back in the mold cavity in the manner described, the operation of preparin the mold for the cast is greatly facilitated and I am enabled to dispense with the provision of wires extending through the cope to be fastened to the back after the latter is placed in the mold cavity. The t invention increases the speed of asscmb the mold for casting operation and bett r insures accuracy in the positioning of the lug and the reinforcing hack in the shoe;

llt is'only necessary to provide soft sand vents 34.- in the mold to permit the escape of gases. I prefer to locate the wires 33 close to the lug 27 where they will engage the reinforcing back 80 at its recessed central part 35. Y

My invention provides a permanent mold handled for rapidly and economically casting brake shoes, and for producing brake shoes of uniform and sunerior quality. The construction shown is adapted for casting an approved. type of' car shoe which is standard on a great many railroads, and which has chilled ends d intermediate soft cast iron wearing cc, but this construction may be varied 20 produce other types of shoes. The con. truction of the mold in three members and associating these members in the manner set forth is of special value and importance since it enables the mold to be rapidly handled tomake and discharge a casting in fast time. By makthe cope in two members, one being relatively fixed andthe other relatively slidahle, and the drag in one member hinged to swing away from the cope, I have produced a form of mold which l. believe is particularly suited for casting brake shoes,

which are a comparatively heavy casting. When the casting operation is completed, I prefer to remove the pins 16 and permit the drag to swing downward as indicated in broken lines in Fig. 1. The shoe casting will remain held in the cope, under all ordinary conditions, until the sliding member 8 of the cope is pulled away from the relatively fixed member 7, and if the shoe casting does not then drop out of the fixed member 7 itcan be very easily dis located therefrom. Thus the drag of the mold is protected from injury when the shoe casting is discharged from the mold, and likewise the cope members are supported so that the shoe can be discharged from the cope without injury to its members. This is especially important where the mold cavity is faced with refractory material, because it avoids wear of t e refractory facing. The assembly of the lug, its core and the back in a unit is of articular value and importance because t ese units can be prepared in quantities and inserted in the mold as required, and the units can be handled freely without danger of injuring or disarranging the parts thereof so that the whole operation of placing these parts in the mold cavity and supporting them in proper position for embedment in the body of the shoe casting is greatly facilitated. If it should be desired to have the top of the steel lug bare, instead of being covered with cast iron, the member 7 of the cope may be extended at the top 36'to a position above the In to be engaged by the lug as indicated in ig. 5, and in this construction the parting line. between the members 7 and 8-of the cope will bev offset at 37.

I have illustrated the invention in a selected embodiment which I believe will be readily understood by those skilled in the art, but I do not wish to be restricted to the use of my invention for the manufacture'of this particular type of shoe, since it can be used with satisfactory results in the production of other shoes and in making other castings for which my invention may be employed, and therefore I consider myself entitled to'make all changes in the form, construction and arrangement of parts as fairly fall within the scope of the following claims.

I claim 1. A permanent mold for'making castings, comprising a relatively fixed member,

a hinged member, a slidable member, andmeans for securing said'members together to close the mold.

2. A permanent mold for making castings, comprising a relatively fixed member, a member hinged to said fixed member and adapted to swing freely therefrom, a member slidable relative to said fixed member,-

and means for holding said members together to close the mold.

3. A permanent mold for making castings, comprising a hinged drag member, a

two-member cope, one of said cope members being slidable relative to the other cope member, and means for holding said members together to close the mold.

4. A permanent mold for making castings, comprising a two-member cope, one of sald cope members being relatively fixed ings, comprising a movable drag member, a

two-member cope, each cope member having a part of the mold cavity therein one of said cope members being relatively fixed and the other cope member being slidably supported on the fixed cope member, and means for holding said members together to close the mold.

6. A permanent moldfor making castings, comprising a two-member cope, one of said cope members being relatively fixed, guides on said fixed member, the other cope member being slidably mounted on said guides, a drag member hinged to the fixed member to swing freely relative thereto, and means for holding said members together to close the mold.

7. A permanent mold for making castings, comprising a two-member cope, one of said cope members being fixed and the other cope member being slidable relative to the fixed cope member, means for securing said cope members together, a drag member hinged to said fixed cope member and adapted to swing freely relative to the cope, and means on the slidable cope member and on the drag member for holding the drag member in close relation with the cope members.

8. A permanent mold for making castings, comprising a cope having a fixed member and a slidable member, a drag hinged at one sideto the cope and adapted to swing freely and bodily relative to the cope, means for securing the drag. in close position relative to the cope, a keeper on the slidable member of the cope, a tongue on the drag to engage said keeper, and a removable pin to hold said tongue in engagement with the keeper.

9. A permanent mold for making castings, comprising a two-member cope having a mold cavity therein with the parting line between the two members of the cope ex tending longitudinally of the mold and sub stantially centrally through the cavity, one of said cope members being slidable relative 1y to the other cope member, a drag memdrag member being movable relatively to the cope, parts of the Walls oi. said cavity in the drag and in the cope having a facing of retractory material and other parts of said wallsbeing left bare so that the metal of the drag and cope willhave a chilling effect upon the casting at the bare parts of the Walls, but will beprevented from chilling the casting opposite the refractory facing.

12. A mold for casting a brake shoe comprising a two-member cope and a drag having a mold cavity therein, one of said cope members being fixed and the other; cope member being slidable relatively to the fixed cope member, the drag member being hinged to' the fixed-cope member to swing freely jrelatively thereto, and means for supporting within the cavity the attaching lug and the reinforcing back to be embedded in the shoe casting and the core to form the opening in the lug. V

18. A mold for casting a brake shoe, comprising a two-member cope and a drag having a mold cavity therein, the parting line between the two members of the cope extending longitudinally of the mold and substantially centrally through the cavity, and means within the cavity for supporting therein the attaching lug and the reintorcing backto be embedded in the shoe asting and the core to form the opening in the lug. 14:. A mold for casting a brake shoe, comprising a two-member cope and a drag havinga mold cavity therein, the partingline between the two members of the cope extending longitudinally of the mold and through the cavity, and means within that portion of thecavity in onemember of the cope "for supporting therein the attaching lug and the reinforcing back to be embedded 1n the shoe casting and the core to form the opening-in the lug while the mold is belng closed;

15. A mold for casting a brake shoe, comprising a two-member cope and a drag having a mold cavity therein, theparting line between'the two members of the cope extending longitudinally of the mold and substantially centrally through the cavity, and means within the cavity andlocated partly in onemember of the cope and partly in the othermember of the cope for supporting the attaching lug and the'reinforcing back to be embedded in the shoe casting and the core toform the opening in the lug during the casting operation.

16. 'Amold for casting a brake shoe, comprising a two-member cope and a drag havinga 'mold cavity therein With a part of the cavity in one cope member and a part in the other cope member, and means within the part of the cavity in one cope member for supporting therein the attaching lug and the reinforcing back to be embedded in the shoe casting andthe core to torm'the opening in the lug. V

17.'A mold'tor casting a brake shoe, comprising a two-member cope and a drag having a mold cavity therein with a part of thecavity in one; cope memberand a part in the other cope member, the cavity in one co'pe'member being constructed to cooperate with a back unit comprising an attaching lug, a core for forming the opening in the lug and a reinforcingbackto support said 'unit prellmmary to'closlngthe mold. V

18. A mold for CELStlIlg a brake shoe, comprising a two-member cope and'a drag having a mold cav1ty:there1n,'a part of the cavity being formed in one member of the cope and a part in the other member of the cope, a unit comprising an attaching lug, a

core to form the opening the lug, and a reint'orcing'back, and means in one-cope member cooperating withsaid core to support said unit in saidmember of the cope preliminaryto closing the mold.

19. A mold for casting a brake shoe, comprising a two-member cope and a drag having a mold cavity therein, said cavity comprising arecess with side extensions thereof, a part of sald cavity belng tormedin one member of thecope and a part in the other member of the cope, and a core for forming the opening in the lug of the brake shoe engaged with said extensions in one cope memher to support said core'preliminary to closing the mold. p

20. A mold for casting a brake shoe, comprising a two-member copehaving a part of a mold cavity formed in one member and a part in the other member, and means for supporting in the part of the cavity in one member of the cope a core for forming the opening inthe attaching ing of theshoe preliminary to closing the mold.

21. A mold for casting a brake shoe,com-- prising a two-member cope having a part tliG' Sh'OHl dGI' S on the cope for supporting the core preliminary to closing the mol and'whi'le'themoldii'sclosed. N

22. The combinationof afm'ol'd for casting a brake shoe, comprising a two-member cope having a part of the mold cavity in one member and a part of the mold cavity in the other member, a back unit comprising an attaching lug, a core to form the opening in the lug, a reinforcing back, means for tying said back to said core, and interengaging means between the walls of the mold cavity and said core to support said back unit in the mold cavity preliminary to and while the mold is closed.

23. The combination of a mold for casting a brake shoe and having a mold cavity therein, a core supported in said cavity for forming the opening in the attaching lug of the shoe, and a reinforcing back suspended from said core.

24. The combination of a mold for castingin, a. core for forming the opening in the attaching lug, interengaging means between the walls of the mold cavity and the core to support the core in the mold cavity, a reinforcing back, and means for suspending the reinforcing back from the core.

26. The combination of a mold for casting a brake shoe and having a mold cavity therein, a core for forming the opening in the attaching lug of the shoe, shoulders on the walls of the cavity and cooperating shoulders on the core to support the core in the cavity, a reinforcing back, and means for suspending the reinforcing back from the core.

27. The combination of a mold for casting a brake shoe and having a mold cavity therein, a core for forming the opening in the attaching lug of the shoe, shoulders at the ends of said core, shoulders on the walls of the mold cavity to be engaged by the shoulders on the ends of the core to support the core in the mold cavity, a reinforcing back, and wire ,ties connecting the reinforcing back to the core.

JAMES S. THOMPSON.