US1146124A

US1146124A - Type-casting machine.

Info

Publication number: US1146124A
Application number: US71133112A
Authority: US
Inventors: Shanker Abaji Bhisey
Original assignee: Individual
Current assignee: Individual
Priority date: 1912-07-24
Filing date: 1912-07-24
Publication date: 1915-07-13
Anticipated expiration: 1932-07-13

Description

s-.VA. BHISEY. TYPE CASTING' MACHINE. Armcmon'msb 1uLY24. 1912.

Patented July 13, 191,5.

S. A.'BHISEY.

`TYPE' CASTING MACHINE. APPLICATION 'FILED 1uLY24.1`912.

1,146,124. Pa1en1eaJu1y-13,1915.

s SHEETS-SHEET 2.

I www S. A. BHISEY.

TYPE CASTING MACHINE.

APPLICATION man 1uLY'24. 1912.

1,146,124. Patented July 13, 1915.

6 SHEETS-SHEET 3.

Q if!) S. A. BHISEY.

TYPE CASTING MACHINE.

APPLICATION min 1uLY24. |912.

1,146,124., l Patented July 13, 1915.

6 SHEETS-SHEET 4.

S. A. BHISEY.

TYPE CASTING MACHINE.

APPLICATION FILED IuLY 24. 1912.

1,146,124. l Patented July I3, 1915a 6 SHEETS-SHEET 5.

S. A. BHISEAY.

TYPE CASTING MACHINE.

APPLICATION FILED IuLY 24. I9Iv2.

1,146,124. Patented JuIyI, 1915.

6 SHEETS-SHEET 6.

104 g /07 Y 1w COLUMBIA PLANOGRAPH Lto-.WASHlNuToN D c TYPE-CASTING MACHINE.

Specification of Letters Patent. Patented July 13, 1915.

Application filed July 24, 1912. Serial No. 711,331.

T0 all whom it may concern.' j

Be it known that I, SHANKER ABAJI BHISEY, a subject of the King of Great Britain, residing at London, in the county of London, England, have invented certain new and useful improvements in Type- Casting Machines, of which the following is a specification.

This invention relates to type casting machines and has reference particularly to type casting machines in which a plurality of type are cast at each operation and the molds then removed from the casting spout, the types extracted from the molds and delivered to a magazine or collecting device and the molds returned again to the casting position.

A primary feature of theV present invention consists of an improved means for Withdrawing the types from the molds, the essential characteristic being that the types are withdrawn longitudinally by means of a tang or break piece cast integral with the type or alternatively by means of iinn gers or the like separate from the molds which engage the types and push them out of the molds. The former of these methods renders it possible to employ closed molds, the removal of the types being effected without the necessity for separating the mold parts and another important feature of my invention consists broadly in the provision of a device for forming the nicks in the type, the characteristic feature being that this nick-forming device is automatically introduced into the mold when the types are to be cast and automatically removed from the mold to enable the cast types to be withdrawn without opening'the mold. Alternatively the types maybe cast without nicks in which case I provide means for cutting the nicks after removal from the molds, the nick cutting apparatus com prising receptacles to which the cast types are delivered and in which they are clamped so arranged that the types are during their passage through the machine automatically carried into and out of engagement with a nick cutting instrument and this instrument may take the form of a rotating cutter or a reciprocating file.

Further features embodied in the machine are a reciprocating abrading device by means of which the bur left at the feet of the type may be removed; a polygonal eccentric for enabling the pressure of the mold against the casting spout to be adjusted and fory compensating for any wear; the provision of a pump controlling cam with projections which so coperate with small rollers on the pump lever as to insure a rapid release of the pump plungerT under the influence of its spring, the arrangement preferably being such that thepump plunger is allowed to descend sufficiently to close ithe inlet openings to its cylinder before the plunger is finally releasedg-the provision of means for enabling the vstroke of the pump to be adjusted and the. fastening of the molds upon an L shaped mold support by means of screws set diagonally. i

In the accompanying drawings a machine embodying these features is illustrated.

Figure 1 is an elevation partly in section of a machine constructed according to my invention. Fig. 2 is a half plan thereof projected from Fig..1. Fig. 3 is an elevation, partly in section, of part of the machine showing the mold opened for the ejection of the type. Figs. 4 and 5 illustrate'one construction of mold and a method of securing it in place. Figs. 6 and 7 illustrate another construction of mold and another method of securing it in place. Fig. 8 is a sectional elevation of mechanism lfor cutting notches in the type.. Fig. 9 is a sectional plan ofa modified form of mechaf nism for eiecting the same object. 1 Figs.

10 .and 11 illustrate amethod of varying the stroke'of the force vpump for injecting the moltenv metal into the molds. Fig. 12 is an end elevation of the mold carriage and molds of a modified construction of the machine looking from left"to right of Fig. 6. Fig. 13 vis a sectiony of the molds and mold carriage-of this modified construction and its connections. Fig. 11 fis a similar view to Fig. 13 showing lthe mold open. Fig. 15 is an endelevation of the mold carriage and molds of a third modification of construction of the machine. Fig. 16 is a plan of Fig. 15. 17 is a section of the mold and mold carriage of this modified construction and its connections. Fig. 18 is a similar view to Fig. 17 showing the mold open. Figs. 19 and 20 are details of the adjusting mechanism for oney ofthe rollers.

Referring particularly to Figs.A 1-9 the numeral 1 designates the cam shaft and 2 the mold carriage which is slidable to and from the casting spout 3 in guides t carried by the framework of the machine. The molds (Figs. 4-7) are built up upon the carriage 2 of the body plates 5 and division walls 6 are permanently closed-in this eX- ample-by the cover plate 7. The molds (Figs. 4-7) are secured tothe mold support 8 by means of screws 9 set diagonally so as to press the molds simultaneously against both the base and the back of the support 8. These screws 9 may pass down into the mold support as shown in Fig. 4 or may pass upwardly through the mold support into the mold, a brass bush 10 being set transversely in the mold to receive the inner end of the screw as shown in Fig. 6. rihe matrices 11 are mounted within a bar 12 of channel section which is suitably secured to the back of the L-shaped mold support 8. The arrangement of the molds and' matrices is preferably such that they can be bodily moved from thek mold carriage. The numeral 13 designates a convenient form of nick forming member which consists of a cylindrical bar 13 provided with a fiat face 14 which runs through allk the molds. Keyed upon this nick forming bar a pinion 15 is arranged which gears with a quadrant 16 in a manner which will hereafter appear so that when the types are being cast a portion of the bar 13 protrudes and when the types are completed the bar is turned so as to bring the iiat face 14 in line with the inner face of the cover plate and thus no obstruction is offered to the withdrawal of the cast types. 1t should b e noted that this particular means for forming the nick is given by way of eX- ample but any construction which involves the` automatic introduction into and withdrawal from the mold of a nick forming obstruction falls within the scope of my invention.

Hinged to the bar 12 a hinged bracket 17 isprovided and a spring 18 is interposed between this bracket and the bar 12 and serves to take up any backlash and insure the steady pressure of the mold against the casting spout 3. Lugs 19 project from the bracket 17 and in slots 2O in these lugs bearing bloc ts 21 are located andthese bearing blocks carry the spindle 22 of a roller 23 which roller coperates with the cam 24 which controls the movement of the mold carriage and support toward the casting spout. Upon the same spindle 22 polygonal blocks 25 are eccentrically mounted and can by means of set screws 26 be secured in various positions abutting against the bracket 17. 1t will be obvious that by turning these eccentric polygonal blocks the position of the roller 23 relative to the cam 24 can be adjusted within the limits of the eccentricity of the blocks 25.

The further important constructional features of the machine will best be understood and appreciated if described in relation to the operation of the machine which is as follows: Cams 27 on the shaft 1 operate in conjunction with rollers 28 on the end of pivoted pump levers 29 and cause the pump plunger (not shown) to be lifted against the inliuence of a spring and the cam 24 on the shaft 1 operates in conjunction with the roller 23 to close the mold against the casting spout 3. Assuming the mold to be closed the cams 27 reach the point where they release the pump plunger, that is to say, the point where the rollers 28 drop olf the largest diameters of the cams 27. Ordinarily the release of this roller occurs somewhat slowly owing to considerable radius of the rollers 2S. To obviate this and insure a more rapid release I providev on the pump cams near their release edges, lateral projections 30, terminating' in corners of small radius, which projections cooperate with small rollers 31 on the pump lever 29. The form of the cam 27 and projections 30 is preferably such that it permits the pump plunger to fall suiiiciently to close the inlet openings from the melting pot to the pump cylinder before the release of the pump plunger occurs. rlhe release of the pump plunger will cause metal to be ejected from the casting spout 3 into the mold cavities and the type will be cast as will be readily understood. Cams 32 now operate in conjunction with the rollers 33 carried upon a link 34 proceeding from the mold carriage andsupport and the mold moves away from the casting spout, the supporting levers rocking about their

pivotal points

36 and 37. For a portion of the movement, the whole of the mold parts move away from the casting spout until an eye 38 connected to the break bar 39 of the mold, is arrested by the hook 40 and prevented from further movement, whereupon the rest of the mold continues its movement and the type 41 is withdrawn by the engagement of its tang or break piece 42 with the break bar 39. Before however this withdrawal of the types tapes place the quadrant 16 will have turned the pinion 15 keyed upon the nick forming bar 13 sufliciently to turn the flat 14 of the nick forming bar into the position previously occupied by the nick forming portion of the bar, thus this nick forming bar will form no obstruction to the withdrawal of the types.

The movement of the quadrant 16 is effected in the following manner: The upper end ofthe quadrant is provided with a nose 43 which, when the mold is closed against the casting spout, is engaged in a notch 44 in a bracket 45 rigidly secured to the frame of the machine. The quadrant is pivoted to the movable mold carriage and thus moves bodily with the mold carriage and by reason of the engagement of the nose 43 in the notch 44 the quadrant 16 alsovmoves about its pivot and operates the pinion 15 with Cil the before described result. When the pinion has been turned sufficiently the nose 43 will become disengaged from the notch 44. On the hook 40 is a small nose 40a just behind the vertical portion 40h. The vertical portion 40b when free projects slightly above the guide slot 2a by the upper side of which it is depressed during the motion of the mold carriage toward the casting spout. Before the break bar reaches the position shown in Fig. 3 the vertical portion 40b is released and the nose 40a rises behind the eye 38 thus preventing the break bar from returninguntil the mold parts have or have almost reached it. Springs 39a may be provided for allowing of expansion of break bar between slipper 39b and break bar.y

The types thus withdrawn from the molds by means of the break pieces are detached from the break piece or tang and delivered to a chute 61 in the following manner: A breaking lever 46 pivoted to a bracket upon the mold is provided at its upper end with a roller 47 and at its lower end with a breaking member 48. The roller 47 is by means of a spring maintained in contact with the under surface of a member 49 which is pivoted at 50 to the bracket 51 and is secured against movement by a pin 52 passing through holes in it and in the bracket. The object of this particular arrangement is to enable the member 49 to be turned out of the way when it is desired to remove the molds from the support or carriage. As the molds move away from the casting spout the roller travels along the path 53 and when it reaches the part 54 the breaking member is depressed sufriciently to contact with the upper surface of the type. Simultaneously the chute 61 is raised and exerts an upward pressure in a different plane by reason of a cam 55 coperating with a roller 56 upon the upper end of a pivoted spring controlled lever 57. This action causes the end 58 of the lever 57 to rise against the roller 59 upon the lower end of the chute 61 thus causing the chute to bodily rise through its guide in the bracket 60 beneath and to one side of the molds. The types will thus be detached from the break pieces or tangs and at the same time tilted so as to fall into the chute 61. On its return movement the member 48 sweeps off the tangs or break pieces, small projections 42L being cast upon the break pieces 42 which projections are engaged by the member 48. The bottom of the chute 61 is closed by a plate 62 which when the types are discharged into the chute is held by the spring 63 in the position shown in Fig. 3 closing the chute. When however the molds move back again into contact with the casting spout carrying the chute 61 and its connections with them, the end of the plate 62 contacts with the stop 64 on the framework of the machine, the spring 63 is compressed and the opening 65 in the plate 62 comesl into position coincident with the bottom of the chute and the types fall out into a magazine or other receptacle designed to receive them. As the roller 59 in its movements has to run on and off the end 58 of the lever57, the upper surface of the

end

5,8 of this lever is preferably inclined somewhat to give a lead to the roller.

Although it is generally advantageous to form the nicks in the type during the casting operation, the types may be cast without nicks and the nicks formed by cutting afterward. Means for enabling this nick cutting to be performed are illustrated in Figs. 8 and 9. In Fig. 8 the arrangement consists of a chute 66 down which the cast types pass which may be the chute 61 but is preferably another stationary chute 66 located `beneath the chute 61. A spring pressed pressure block67 having a projection 68 operates through openings in the wall of the chute 66. The projection 68 catches the types as they fall and the block 67 forces them against a file or nick cutting instrument 69. The'file or nick cutting instrument 69 rapidly reciprocates and forms the required nick or nicks. A part of the instrument 69 may be formed as a beveled file surface 70 which will serve to remove any burr on the feet of the type due to the detachment of the break piece. When the nick forming and abrading operations have been completed, the pressure block 67 is moved back against the action of its spring by the lever 71 and the types are allowed to fall. The portion 67a on' block 67 serves to withdraw type from files when the nicksare completed. The fileA instead of reciprocating may be in the form of a band file traveling continuously as shown at Fig. 9. The continuously running chain 72 carries a number of small files 73 eachhaving nick forming and abrading surfaces which protrude into the chute 74 which corresponds to the chute 66 shown in Fig. 8.V The chute 74 is provided with an exactly similar arrangement for catching and holding the type in position against the cutting and abrading surfaces as that shown in Fig. 8. That is to say, a spring pressed presser block 67 catches the type and forces it against the opposite wall of the chute while the files operate upon the type and a lever 77 similar to the lever 71 operates to move the presser block 75 back and thus the typeis permitted to fall. The chutes 61, 66, and 74 are preferably provided with ribs such as 742L as shown in Figs. 8 and 9 which extend suiiiciently into the chutes to form separate compartments for each type. The size of the chutes and the extent to which the ribs 7 4a extend into the chutes will depend on the cross section of the type being cast. In Fig. 9 the types are shownrectangular in cross section,

The provision of a permanently closed mold gives manifest advantages but it also involves difficulties particularly in 'the matter of forming the nicks in the type. 1f desirable therefore a machine embodying the essential featur-es of my invention may be constructed with a removable cover plate. Such constructions are shown in Figs. 12 to 18.

Referring to these figures the cover plate 78 is provided with a nick forming protrusion 79 integral with it. Duringr the casting operation the cover plate 78 is held. firmly down by means of the engagement of the levers 80 operated by the cams 81 with the rollers 82 which are carried by the lower ends of rods 83 connected 'at their upper ends to a yoke 84- which presses upon the cover plate 78 of the mold. Vhen however the types are to be withdrawn from the molds the rollers 85 fall off the surfaces 86 of the cams 81 and springs 87 force the cover plate 78 up and move the protrusions 79 out of engagement with the nicks in the cast types. Thus the types are free to be withdrawn by means of their tangs or break pieces precisely as in the previously described construction. That is to say, cams operate in conjunction with rollers carried by the mold carriage to reciprocate the mold to and from the casting spout 88. A hook 89 operates to arrest thermovement of the break forming member 90 of the mold and while the rest of the mold parts continue their movement leaving the types attached to the break forming member, levers 91 having a break bar 92 operate by the co-action of the rollers 93 with the surfaces 91 to detach the types from their break pieces while the chute 95 rises to assist the breaking or detaching operation and also insures the tilting of the type in the chute.

It is sometimes desirable in machines of this character to be able to adjust the stroke of the metal ejecting pump. A means for effecting this is shownin Figs. 10 and 11. The pump plunger is raised against a spring and released to eject the metal. Therefore the effective stroke of the pump is determined by the distance the pump plunger is allowed to fall under the influence of its spring. Tn order to render this distance variable T provide wedges 96 which may have graduation markings 97. These wedges are arranged beneath the pump plunger rods and are connected together by means of a yoke 98 having a tapped opening 99. By means of the screw 100 adapted to be rotated by the handle 101 these wedges can be adjusted in position with various parts of their inclines controlling the stroke of the pump.

In Figs. 15, 16, 17 and 18, T have shown a construction of open mold apparatus Where the cast types are withdrawn from the mold by means of fingers which enter the mold cavities. Referring to these figures the numeral 102 designates the molds, 103 is the mold cover and 101 the break bar of the mold. The mold cover 108 is during the casting operation held down by the yoke 105 which is connected to the pivoted levers 106 by the rods 107, rollers 108 on the end of the levers 100 coperating with cams as clearly shown in Figs. 17 and 18, 18 and 11. The arrangement in the present example is substantially the same as in the prior described example except that the yoke 105 does not move with the mold carriage 110, roller bearings 109 being provided to render easy the movement of the mold carriage 110 relative to this yoke 105. After the types have been cast in the mold in the usual manner, the mold cover 103 rises under the influence of the springs 111 the rollers 108 slipping off the larger diameters of their cooperating cams as will be readily understood, The mold then bodily moves clear of the casting spout after which the movement of the mold body is arrested. During this movement the break bar 101 of the mold moves with the mold but is connected by means of the lever 112 with the framework of the machine with the result that it is pulled down somewhat into the position shown in Fig. 18. This downward movement of the break bar 104 causes the types to be severed from the break pieces, the types remaining in the mold. Fingers 113 which are preferably interchangeable are carried by 'rods 11-1 which telescope in the hollow members 115 of bell crank levers 116 pivoted at 118. Rollers 119 on the ends of these levers coperate with cams and the fingers 113 are by means of these cams brought into engagement with the mold carriage pins 120 being provided to engage grooves 121 in the carriage. The lower ends of the fingers 1.18 are now behind and in line with the cast types lying in the mold and as the carriage continues its movement the fingers enter the mold cavities and push out the types, the mold body remaining stationary while the mold cover 108 and the matrix and its rod 11st and hollow members 115 move with the mold carriage. Ubviously instead of the fingers moving` to extrude the type, the arrangement may be such that the mold moves and the fingers remain stationary. 1t will be understood that the finger' carrying rods 1141 telescope into the hollow members 115 of the bell crank levers 116. The types thus pushed out of the molds by the fingers 118 are deposited upon a pivoted platform 117 which by means of l a spring tends to rise to the position shown in Fig. 18, but is depressed into the position shown in Fig. 17 as the matrix and its carrier moves back to the casting position. From the platform 117 the type passes to a CLK second pivoted platform 122 which is, by means of the link 123 and the bell crank lever 124 and the roller 111, actuated by a cam 125 on the cam shaft and the formation of this cam is such when the mold parts and connections return to the casting position the platform 122 is tilted to the position shown in Fig. 17 when the type falls into the collecting chute 126. It will of course be understood that the details of construction of my invention may be varied in many ways within the scope of my claims, the particular arrangements shown and described being given merely by way of eX- amples.

What I claim and desire to secure by Letters Patent is 1.'In a type casting machine, a casting spout, a mold adapted to cast a type with a break piece, means for ejecting metal from the spout to the mold, and means coperating with the break piece of the cast type for withdrawing the cast type from the mold substantially as specied.

2. In a type casting machine a `casting spout, a mold having a break forming member movable relative to the casting spout, means for moving the mold and the break forming member relative to the casting spout, and means for arresting the movement of the break forming member and permitting the mold proper to continue its movement whereby the type is positively withdrawn from the mold by the break piece substantially as specied.

3. In a type casting machine a casting spout, a mold having a break forming member movable relative to the casting spout, means for moving the mold vand the break forming member relative to the casting spout, means for arresting the movement of the break forming member and permitting the mold proper to continue its movement whereby the type is positively withdrawn from the mold by the break piece and means for detaching the type from its break piece substantially as specified.

il. In a type casting machine a casting spout, a mold having a break forming member movable relative to the casting spout, means for moving the mold and the break forming member relative to the casting spout, means for arresting the movement of the break forming member and permitting the mold proper to continue its movement whereby the type is positively withdrawn from the mold by the break piece, means for exerting a pressure upon the upper surface of the type in one plane, a vertically movable chute located beneath the type and designed to receive it, means for moving the chute to exert an upward pressure upon the under surface of the type in a plane other than that in which the pressure is exerted upon the upper surface of the type whereby the type is simultaneously detached from its break piece and tilted into the chute substantially as specified.

5. In a type casting machine, a mold, means for injecting molten metal into the mold, a partially cylindrical nick forming member provided with a flat face, and means for rotating the nick forming member to automatically turn the cylindrical portion into the mold cavity during the casting operation, and to turn it out of the mold cavity to enable the type to be withdrawn. i

6. In a type casting machine, a. casting spout, a reciprocable mold carriage having an L shaped mold support, a mold fitting upon the L shaped mold support, a screw connection between the mold and the support set diagonally whereby the mold is pressed simultaneously both against the base and back of its support, and means for removing th'e cast types from the mold substantially as specified.

7. In a type casting machine, a casting spout, a mold reciprocable relative to the casting spout, cams operable to reciprocate the mold, a roller associated with the mold and cooperating with a cam to cause the mold to be pressed against the casting spout, a polygonal eccentric associated with the roller whereby the position of the roller relative to the cam can be adjusted, and a second roller'associated with the mold and coperating with a cam to cause the mold to move away from the casting spout and permit the withdrawal of the cast type substantially as specified.

8. In a type casting machine a casting spout, a mold having a break forming member movable relative to the casting spout, means for moving the mold and the break forming member relative to the casting spout, and means for eifecting movement of the break forming member relative to the mold proper whereby said break forming member and mold proper separate and the type is positively withdrawn from the mold by the break piece substantially as specified.

In `testimony whereof, I aliiX my signature in the presence of two witnesses.

SI-IANKER ABAJ I BI-IISEY.

Witnesses:

H. D. JAMIsoN, T. J. WALTER.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents, Washington, D. G.