ÜCÍ- 22, 1946» ‘ J. P. BARBOUR 2,409,824 PRESS Filed July 2°, 1941 5 sheets-sheer 1 lNvi-:NToR JAMES r2. BARBOUQ 'av . AT1-onu: I Oct. 22, 1946 ° '.1. P. HARBOUR 2,409,824 PRESS Filed July 22, `1941 5 Sheets-Sheet 2 lal 4 r // NVENTOR v ATTDRFEY ` Oct. 22, 1946. J. P. BARBOUR 2,409,824 PRESS Filed July 22, 1941 _»-l lìi 3 Sheets-Sheet 5 . 9 sNvENToR ' .JAMES Fa BARBOUR 2,409,824 Patented Oct. 22, 1946 `UNITED STATES PATENT ' OFFICE PRESS James P. Barbour, Philadelphia, Pa., assìgnor to The Baldwin Locomotive Works, a corporation of Pennsylvania Application July 22, 1941, Serial No. 403,495 8 Claims. (Cl. ’Z8-0.5) 2 This invention relates generally to presses es pecially for forming briquettes and relates more the relation of the operating rams and plungers at the instant when breaking of the toggle mecha particularly to improved means for controlling nism is initiated; the briquetting operation to avoiddamage to Fig. 8 is a transverse section taken substan tially on the line 8_8 of Fig. l with certain parts the press in the event that an abnormal oper ating condition occurs. ABriquet presses whether of the mechanical or ‘ omitted for sake of clarity; and Fig. 9 is a section on the line 9_9 of Fig. 3. In the particular embodiment of the inven hydraulic type are arranged to compress loose tion disclosed herein for purposes of illustration, material such as metal chips or lathe turnings I have shown my invention embodied in a bri into small compact briquettes. One difficulty in quetting press of the type disclosed in Smith et this type of press is the possible failure of the al. United States Patent 1,473,389. For purposes machine to eject a completed briquet in which of simplicity many of the parts of this type of case a second briquet tends to be formed while press are omitted from the disclosure herein but the first briquet still remains in the machine. It is an object of my invention to provide im 15 it may be considered to be identical to that dis closed in said Smith et al. patent except Where proved means for rendering the press inoperative certain details are changed to adapt my im automatically upon occurrence of a predeter provement thereto. mined abnormal operating condition, such for Briefly, the press consists of four horizontal example as the failure to properly eject a formed product. A further object is to provide improved 20 tie rods I, Figs. 1 and 8, for holding together longitudinal frame sections 2 and for supporting means for automatically preventing damage to stationary transverse crossheads 3 and 4 and a the press in case the briquetting mold is filled fixed material hopper 5. The lower end of hop with an excessive quantity of material. per 5 is provided with a discharge opening '6 Another object is to provide improved means for relieving a coniining force on the briquetting 25 through which material is forced by a compress ing plunger 'I slidable through one side of the material automatically in the event an excessive lower end of hopper 5. The plunger 'I is secured amount of material accumulates in front of the to a movable crosshead 8 which is actuated by compressing plunger. a ram 9 in a stationary cylinder I0. To move A further object is to provide an improved toggle mechanism and means for breaking the 30 ram 3 and plunger 'I forwardly a pressure gen erating ram II extends through the rear end of same to relieve the compressing pressure auto cylinder I0 and is actuated by a suitable rotating matically when excessive material accumulates crankshaft I2 and connecting rod I3, the crank in the briquet mold. shaft being rotated by any suitable motor and Other objects and advantages will be more ap parent to those skilled in the art from the fcl 35 gearing (not shown). Placed in alignment with the hopper outlet 6 lowing description of the accompanying draw is a floating mold IlI having a pair of stripper ings in which: ' actuating rods I5 slidably extending through a Fig. 1 is a longitudinal section through a briquetting press embodying my improved toggle reciprocating mold actuating crosshead I6, the position; crosshead I6 during its rearward stripping action movement. The crosshead I6 is adapted on its foward movement (to the left, Fig. 1l to move mold I4 against hopper 5 whereby material may control which is shown in its normally operative 40 rods being provided with nuts I‘I for engaging Fig. 2 is a fragmentary longitudinal section similar to Fig. 1 but showing the toggle mecha nism in its broken position together with release of the mold to allow discharge of a second 45 be transferred from the outlet 6 into the mold by plunger 1. To accomplish this forward or closing movement of mold I4 a pair of plungers Fig. 3 is an enlarged fragmentary section show I8, connected to crosshead I6, moves forwardly ing the toggle mechanism and operating means in a pair of cylinders I9 formed within station therefor in its“ normally operative position; Fig. 4 is an. enlarged fragmentary section 50 ary crosshead 4 thereby to maintain a forward force on‘ a second pair of plungers 20 which are showing the toggle mechanism in its broken posi briquet; tion; connected to mold I4. The mold actuating cylinders I9 are connected Fig. 5 is a plan View of the> toggle mechanism to any suitable source of constant pressure such with certain parts omitted for sake of clarity; Fig. 6 is an enlarged fragmentary sectional 55 as an intensifier or accumulator (not shown) through a pipe 2| and similarly the main com view showing the abnormal presence of two pressing cylinder Iß is .connected by a pipe 22 to briquettes in the press mold and disclosing the a source of constant pressure specifically shown relation of the operating rams and plungers just in the form of an intensifier 23. To reciprocate prior to the automatic breaking of the toggle 60 the plungers I8 against the action of the con control; lFig. 7 is a view similar to Fig. 6 but showing stant ‘pressure in pipe 2I`the crosshead I6 `is 3 2,409,824 mechanically reciprocated by a crank arm 25 has initially moved crosshead 3l and plunger secured to a shaft 26 which is suitably journalled in stationary crosshead 3 while an operating arm 2ï also secured to shaft 26 is o-scillated 'by the connecting rod 28 extending forwardly to a piv oted lever 29, link 29', connecting rod 30 and' crosshead 3l to which rod I3 is connected. This operating connection insures closure of mold I4 Il on its compressing stroke (to the right) suf ficient to close mold E and compress iiuid in cyl inder I9. Continued compression of fluid in cyl inder Iß accordingly moves plunger 9, crosshead 3 and compressing plunger l to the right so as to force material from hopper 5 ahead of plunger 'I intofmold cavity i4. Lateral resistance between a during initial forward movement of compressing partially formed briquet and the side walls of mold plunger l, it being understood that after closure 10 I 4 will cause the mold to move or iloat slightly to of the mold any additional movement of the con nection 3l! will be taken up :by movement of link '29’ relative to lever 29 when the latter is in its horizontal position as shown in Fig. 1 but any small further movement that might be imparted to lever 23 is allowed by movement of plungers I 8 within the cylinders I9, all as described in the right under continued compressing movement thereby expelling liquid from cylinders I9 back into the source of constant pressure connected to » pipe 2 I. During this floating action rods I5, Fig. 1, will slide through> crosshead I6. vThe briquet'55 is ñnally fully compressed against a station ary backing plunger 53 secured to stationary crosshead 4. Upon completion of this compress ing action crankshaft I2 moves crosshead 3l and said Smith et. al. Patent 1,473,389, thereby in suring that mold I 4 is held ñrmly in contact with the hopper 5. The crank arm 25 transmits 20 connecting rod I3 to the left and by ’reason of motion to the crosshead I5 andY plungers I8 nuts 5I engaging crosshead 8 plunger 'I is'with through a normally aligned pair of links 32 and drawn and simultaneously floating moldV I4 is 33 respectively connectedvto crossheadv I6 and moved to the' right through the action of'links arm 25 by pivots 34 and 35 and are connectedV together by a pivot pin 36. These links consti 25 30, link 29', lever 29 and link 28 which causes arm '25 to rotate in a clockwise direction. Arm tute a toggle by themselves and when held in 25 thus pulls on the links 32 and 33 and cross rigid alignment also constitute one link of a head IG to engagev nuts Il and'accordingly pull toggle with arm 25. The sections 32 and 33 the moldA away from> the hopper and over there are normally held in rigid alignment by a cylin maining portion of backing plunger 53 thereby der 3l, Figs. 3 and 9, pivotally supported as at 30 to force or strip the briquet out of the mold. 38 to link 33 while a piston 39 is pivotally con The-` discharged briquet> will fall upon a suitable nected at 49 to an arm 4I formed rigidly with link 32, Figs. 3 and 4. conveyor or container Constant fluid pressure 54. supplied from any suitable source> (not shown) through a pipe 45 to the left closed end of cyl inder 31 causes the piston 39 and cylinder 31 35 generally indicated at O-n‘the next compressing’stroke of cross head 3i the links-39, connecting rod`23 and' arm 25 will relatively rapidly return the crosshead I6 to its normal position during the'relatively slow initial compressing movementgof plunger 1 and accordingly reclose >the mold preparatory to being recharged for the next briquet. If for any to pull pivots 38 and 43 toward ‘each other and accordingly force links 32 and 33 downwardly into alignment as shown in Fig. 3. To limit the downward movement of these links a pair of stops 40 reason the briquet previously formed was Vnot~ 42 and 43 are formed respectively on said links so as to engage each other when these links are in alignment. To effect the foregoing action fluid pressure in the right end of cylinder 3l is exhausted through a pipe 46 and valve 44 while the latter is in the position shown in Fig. 3. When valve 44 is in the position of Fig. 4 fluid pressure from any continuous source such as an intensiiier 23 connected to a pipe 22 is sup plied to the right end of cylinder 3l `to move pivots ‘38 and 40 away from each other. thereby breaking links 32 and 33 as shownin Fig. 4 andr allowing mold actuating crosshead I6 to have free movement toward the right for .rendering the briquetting action inoperative as hereinafter described regardless of the continued actuation of crank arm 25. The cylinder 3l Vand piston rod will swing aroundpivot 38 during movement of crosshead i6. ~ The valve 44 is manually moved to its-.posi tion shown in Fig. 3 whereasmovement toits discharged from the mold I4, then .it is seen that ` the next briquet 56 will be‘form‘ed' against the first briquet within the mold‘and consequently there is danger of jamming certain parts. When‘ this occurs the compressing movementof plung er l will be vstopped prematurely, although move ment of ram II may ‘be normal by reason of the fluid in cylinder ill' .being discharged through pipe 22'to intensiñer 23. However, care mustfbe taken not to have ram II hit plunger 3V which may. result` in damage to various par-tsio'f the press equipment. `When plunger 'I andits cross head 8A stop prematurely, then rods 5'9'will con tinue to move tothe right until cam 49 engages switch arm 58 thereby closing switch 48 to ener gize.. solenoid 4l and accordingly move Vvalve 44, Fig. 4, to thejleft.. This immediately admits-fluid pressure from intens'iiierl pipe 22.through. pipe 45 to the right end" of cylinder 3l and accord ingly breaks the aligned position of links 321`and 33'as shown in Fig. 4 whereby'constant pressure position of Fig. 4 is upon energization». of a sole in cylinders ,i9 moves rams i8’ rear-wardlyf'an'd noid 47.` The solenoid is energized upon closure thereby causes crosshead I5 to engagenuts 'I'I to of a switch 49, Fig. 1, mounted upon and mov 'move'mold I4 to the right for- stripping whatever able with crosshead 8. ‘The switch is adapted to 65 excess material may bein the mold for forming be closed by a cam 49 formed >on one of >a plu rality of pull‘back rods 53 connected to crosshead 3I Vand slidably extending through crosshead 8,V the second briquet and for, renderingineiîectual' the .compressive‘eiïect of plunger g1; Breaking-of the toggle ' links ‘ will preventY the moldi'being- re although a pair of nuts 5I on saidv rods are adapt ‘closed and hence further briquettes cannot. be ed t0 engage crosshead 8 tohold the same to 70 made until‘the operator removes the'ñrstbriquet l the left upon return movement of crosshead 3|. Operation that is stuck> in the 'mold' and> thenresetsth'e toggles32, and’33 by manually shifting vali/e744" to the right. One reason for briquettes sticking in the'mold " tion shownin'Fìg. 1 and that the crankshaft I2 75 is that after the' backing plunger 53 o_r the walls Assume that the press elementsare in the ‘posi 2,409,824 6 4. The combination in a press comprising a mold in which material is formed, a plunger for compressing material in said mold, power means of mold hl become worn, shavings or chips forced into the worn clearance assume the character of a flange or ñn which supports the briquet on the having relatively yieldable elements for actuat ing said plunger, means actuated in response to a predetermined relative movement between said yieldable elements occurring upon accumulation end of the backing plunger 53 and accordingly does not drop off when the mold is moved to its stripping position. From the foregoing disclosure it is seen that I of excess material in said mold, and means con have provided a press in which excess or abnor trolled by said responsive means for effecting ejec mally accumulated material in the working path tion of said excess material from the mold. 5. The combination in a press comprising a of the opposed working members, such as the plungers 'i and 53 will be automatically released mold, opposed plungers for operating upon `ma so that ejection of the excess material or work terial within said mold, power means having rel piece takes place in a simple and direct manner and the machine is rendered inoperative until normal operating conditions are restored. While the work-piece herein described is speciñcally in the form of a briquet which is of substantial thick ness, yet the p-rinciples of operation of my im atively movable hydraulic elements for relatively moving said plunger to compress said material within said mold to a substantially predetermined thickness, means whereby upon occurrence of eX cess material within said mold the hydraulic ele ments have a predetermined relative movement between each other, and means controlled by one of said elements to control further compressive proved combination are applicable to products of various thicknesses including sheet metal. It is also seen that the structure for accomplishing this mode of operation is relatively economical in construction, operation and maintenance and has maximum compactness by reason of the action on the material. 6. The combination in a press comprising a floating mold, opposed plungers between which material is compressed within said mold, tog gle operated mechanism `for stripping compressed material from Said mold, said toggle mechanism breakable toggle link being part of the normal operating mechanism which specifically is part of the stripping means. It will of course be understood that various changes in details of construction and arrange ment of parts may be made by those skilled I in the art without departing from the spirit of the invention as set forth in the appended claims. I claim: 1. The combination in a press comprising op including a .collapsible link that is operable as a rigid link during said stripping, and means for collapsing said link to effect an additional stripping action by said mold so as to render in effectual the compressive effect of said 'plungers 7. The combination in a press comprising a floating mold, opposed `plungers between which material is compressed to a predetermined ex tent within said mold, a plurality of :relatively posed working members between which a work piece is engaged, power means for effecting rel ative working ymovement between said members to form the work-piece, means for normally eject yieldable hydraulically actuated elements for ing the work-piece, means rendered operative by moving one of said plungers until it stops at the end of said compressing operation, toggle oper said power means automatically in response to an accumulation of material between said op posed working members upon failure of the cluding a collapsible link that is operable as a formed work-piece to be normally ejected, and. means controlled by said responsive means for automatically effecting ejection of said additional material upon occurrence of its accumulation. ~ 2. The combination in a press comprising op posed working members, power means for effect ing a substantially predetermined relative move ment between Said members to compressively pro duce a work-piece of substantially desired thick ness, means rendered operable by said power means automatically upon failure of said mem bers to obtain said predetermined relative move ment, and means controlled by said latter means whereby the compressive action of said members is rendered ineffective automatically upon failure to obtain said predetermined movement. 3. The combination in a press comprising op posed working members between which a work piece of substantially a, predetermined thickness is compressively produced, power means for effecting a substantially predetermined relative movement between said members so as to pro duce said thickness, means rendered operable by movement of said power means automaticallyin response to failure of said members to produce ' a work-piece of substantially said predetermined thickness, and means whose operation is ini tiated by said last mentioned means whereby said compressive action is rendered ineiîectual auto matically when said members fail to produce a work-piece of substantially said desired thick ness. ated mechanism for stripping compressed mate rial from said mold, said toggle mechanism in rigid link during said stripping, means actuated in response to a predetermined relative movement between said power elements for collapsing one of said toggle mechanisms thereby preventing said'plungers from completing their compress ing operation, and means for effecting a strip ping action by said mold automatically upon col lapse of said toggle mechanism. . 8. The combination in a, press comprising op posed material engaging members for operat ing upon a work-piece, power means for mov ing one of said members through a substantially ~ predetermined work stroke, means whereby said power means is adapted to continue :its opera tion even though said movable material engag ing member is stopped prior to the completion of said stroke, mechanism for controlling the oper ating effect, of said members on a work-piece upon occurrence of said prior stoppage of said mov aible member cooperating control elements one of which is associated with said power means vso as to be movable therewith and the other of which is associated with said movable work mem ber so as to have the movements thereof and said control elements .being so relatively posi tioned that upon said prior stoppage of said mov- j able work _member the control elements are rela. tively moved into coacting relation, and means initiated by the coaction of said elements to render said mechanism operative. JAIVLES P. BARBOUR.