US1523602A - Press - Google Patents

Description

Jan, 20, 1925.

A. J. MATTER PRESS Filed Aug. 2 1921 2 Sheets-Sheet l Jan. 20, 1925. 1,523,602

A. J. MATTER PRESS Filed Aug. ,6, 1921 2 Sheets-Shee't 2 fi m//wm @2 I 2: w

Patented Jan. 20, 1925.

STTES ALBERT J.

FECE.

MATTER, OF CHICAGO, ILLINOIS, ASSIGNOR TO CHARLES F. ELMES EN- GINEERING WORKS, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

PRESS.

Application filed August 26, 1921.

T 0 all whomz't 722((7 concern:

Be it known that I, ALBERT J. MATTER, a citizen of the United States, residing at Chicago. in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Presses, of which the following is a specification.

This invention relates to power operated presses, particularly presses operated under high pressures which are transmitted hydraulically. In the operation of presses of this type, two considerations which are of high importance commercially are economy in power and rapid and uniform operation.

The general purpose of the present invention is the provision of a press construction which will operate automatically to effect the several operations involved in the forming of a contemplated article, whereby to render the product uniform, and one which will also operate and be controlled automatically from cycle to cycle, whereby to maintain the production at a predetermined rate.

Another object of the invention is the provision of a press adapted to eifect a wide opening or separation of the die members so as to facilitate charging and discharging, which will accomplish quick opening and closing of the die members, so as to minimize the time required for such operations, and which will accomplish the application of the desired pressure to the die members with the use or exhausting of a minimum of the pressure transmitting fluid.

Another object of the invention is the provision of particular improvements in press construction whereby strength and rapidity and facility of operation are obtained.

Other and further objects of the invention will be pointed out hereinafter, indi cated in the appended claims or obvious upon an understanding of the invention from the present disclosure.

In the accompanying drawings forming a part of this specification I have shown one form in which the present invention may be embodied, and it is to be understood that the same is here presented for illustrative purpose merely, and that the invention as hereinafter claimed is not to be regarded as limited to this particular embodiment, I being aware that the structure employed is susceptible of modification Serial No. 495,695.

and variation without departure from the essential features of the invention.

in the said drawings- Fig. 1 is a side elevation, partly in section. of a press embodyingmy invention;

Fig. 2 is a front elevation of the same, partly sectional; I

Fig. 3 is a detail in the nature of a fragmentary side elevation partly broken away showing certain of the operation controlling mechanisms; and

Fig. 4 is a detail on substantially line ti of Fig. 1 illustrating the mounting of the pressure control lever.

The invention will be best understood bv reference to these illustrations in detail, in which it will be observed that the reference numeral 1 designates a suitable supporting frame upon which the press and its operat mg mechanism are mounted. The press includes a base member 2 which is apertured to provide a pressure cylinder 4 forming an operative mounting for the press ram 5. The

latter carries a pressure head 6 which sup ports and operates the lower die member 7. Pivoted upon the support 1 is a yoke frame which may be of U-form with lateral arm portions and a top cross connecting portion 8 the location of said frame being such that when in vertical position the cross connect ing portion stands above the press ram. The base 2 supports a bracket 10 at its rear side in which is rotatably mounted a swing head shaft 11, upon which shaft is fixedly mounted a swing head 12. Said swing head is shiftably connected with the yoke frame by means of a curved link 14.- pivoted on the yoke at 15 and having a slot 16 receiving the connecting pin 17 which joins it to the swing head. At each side of the base memher 2 within the span of the yoke frame is mounted a supporting stop 18 adapted to limit the downward movement of the. swing head 12 and afford a support for sustaining it in substantially horizontal position. The swing head 12 carries the upper die member 19 which is adapted for cooperation with the die member 7. These die members are formed with matrices or die cavities for the formation of the intended articles, and are equipped with circulating passages for the transmission through them of heating or cooling fluids introduced through the connectious 20 and 21 and vented through simiin its forward position against the stops 25, the frame stands substantially vertical with its cross connecting-portion above the ram, while when in its rearward position,

which is designated in dotted lines in Fig. 1,

said yokeframe is behind the press ram' so that the cross connecting portion 8 is clear of the same. The dimensions, design and operative connection of the swing head and the yoke frame are such that when :the latter is swung to its rearward position the swing head is swung on its pivot, by =virtue of the connection through the link 14, to an open or angular-position illustrated in dotted lines in Fig. 1; while, when the yoke frame is swung to its forward position, and the swing head is supported inhorizontal disposal by the stop supports 18, the yoke frame may move overthe swing head to its vertical position in which the portion 8 forms an abutment which will support the and cooling fluid from the lines C and D to swing head against upward pressures' Thus it will be seen that the swinging ofthe yoke frame moves said frame into and out of supporting association with the swin head, and also swings the'latter to and pressing position.

The mechanism for swinging the yoke frame to effect these operations includes a hydraulic cylinder 27 having a plunger 28 connected to a rack bar 29, and an opposing pressure cylinder 30 having a. plunger 31 connected to theother end of said rack bar 29. Rack bar 29 has meshing cooperation with the segmental rack 33 which is mounted on yoke frame 8 and cut on a radius from the'pivotal axis thereof. Transmission of the rack 29 forwardly will swing the yoke frame forwardly, while transmission of the rack bar 29 rearwardly will swing the yoke frame rearwardly. 'The pressure cylinder 27 is maintained under constant'hydraulic prcssure delivered from supply line A through a connecting pipe 32 while, as illustrated in Fig. 3, hydraulic pressure may be admitted from supply line A to cylinder 30 by operation of a control valve 34 which admits pressure to the connecting-line 35, and which also is operable to exhaust pres sure from said'line to exhaust line B. This control valve may be of the type described in U. S. Patent to Slater, No. 1,143,236. For the purpose of convenience I will designate the cylinder 27 as the press closing cylinder and cylinder 30 as the press opening cylinder. The press closing cylinder being undercontinuous pressure from the supply fiom its raised or charging position or its lowered or line, it is obvious that there will be a conrstanttendency to close the press, but, due to :the fact that the plunger 31 of the press opening cylinder is larger than the plunger 28, the admission of pressure fluid to the press opening cylinder, and its retention therein, will be effective to swing the yoke frame rearwardly and maintain it in its rearward position. Upon operation of the valve 34 to exhaust pressure from the press opening cylinder, pressure in the press closing cylinder thus becoming superior, the

yoke frame will be swung to its forward position. Operation of the press ram 5 is controlled by a valve 36, which regulates V i the supply of pressure fluid from the line A to the pressure cylinder, and its exhaust from the latter to the exhaust line B, the pipe 37 constituting the connection between said valve 36 and the press cylinder.- 1 In instances where it is desirable to subject the material to heating and cooling influences while it is in the "press, the fluid supplyzlines C and D, one for heating fluid such as steam, and the other for cooling fluid such as 'cold water may be provided,'a pipe 38 being connected to: the inlets 20 and- 21 by suitable flexible connections. Admission of heating the pipe 38 is controlled by a valve 39.

The means whereby the operation of the press in all of its functions is rendered automatic includes a control shaft 40 convenientl journal'led on the support .1:- and arrange to be. driven continuously by a motor 41. Control shaft 40 carries. press control cam 42, frame control cam 44 and fluid control cam Press control cam 42 'is effective to operate valve 36 through the instrumentality of a bell-crank lever 46,- and yoke control cam 44 is rendered effective to operate valve 34 through the instrumentality of a similar .bell crank lever 47. Fluid control cam 45 operates valve 39 through the instrumentality of an arm 48 and link 49. The relationship to cams 42 andv 44 is such that the press control valve 36 will be operated to admit pressure to the press cylinder and to exhaust pressure. therefrom during the time pressure is out off from the press opening cylinder 30. The press ram and the lower die member, therefore, will be actuated to accomplish the pressing operation while the yoke frame is in its vertical position and the swing head and upper die member are supported in horizontal position thereby. The relationship of the fluid control cam 45 is such that the valve 39 will be operated to admit heating fluid and cool- 7 ing fluid to. the die members during desired periods in the operation of the press.- The form of the yoke control cam 44 issuchthat the valve 34 will be positioned to maintain the press opening cylinder 30 under pressure during-the desired' period to permit removal of the pressed article and recharging of the dies. By virtue of this relationship of parts, the motor 41 being actuated at a desired speed, the duration of each operation of the press is accurately and automatically timed, and the cycles of operation follow one another in fixed, definite and constant periodic relationship. As a result the output of the press is held to a definite rate.

By virtue of this construction and association of parts moreover, a minimum extent of movement is required of the press ram, so that only a small amount of pressure fluid is exhausted at each operation. In spite of this small extent of movement of the lower die member, however, the construction affords an arrangement which permits a wide opening or separation of the die members, thus facilitating and expediting the discharge of the pressed articles, the wiping of the die cavities and the recharging, while the periods required for the operations of opening and closing the press are very short.

As a safety expedient for preventing operation of the ram before the swing head and yoke frame are in position, I provide an interlocking mechanism, one feature of which is illustrated in Fig. 4. In this figure it will be observed that the lever 46 which controls the valve 36 is pivoted on a cylindrical hub 50 having the eccentric trunnions 51 journalled in the brackets 52. Upon one of said trunnions is keyed a bell crank lever 54, one arm of which is connected by a link 55 with an arm 56 keyed to the swing head shaft 11. The other arm of said lever 54 is connected by a rod 58 with a treadle 59 which is fulcrumed at 60. The rearward swinging of the swing head 12 will rotate the hub 50 and thereby raise the lever 46 to such an extent that its contact member 46 will be clear of the operating stem of the valve 36, so that the rocking of said lever 46 by cam 42 will not be effective to operate valve 36 and hence will not result in the admission of pressure fluid to the press cylinder. So long therefore as the swing head is in open position, the press ram cannot be operated. The operation of the treadle 59 has a like result in rotating hub 50 to raise lever 46 and disable it so far as operation of valve 36 is concerned. Thus operation of the press may be inhibited, the operation of the control shaft 40 continuing meanwhile, so that the next cycle comes around in regular order.

I claim:

1. In a press the combination with a reciprocable press member, of a pivoted frame member in the form of a yoke extending across said press member, an oscillatory press member, cooperating die members carried by said oscillatory and reciprocable press members, means for moving said frame member into and out of supporting relationship with the oscillatory press member, and means for actuating the reciprocable press member to impose pressure upon the oscillatory press member.

2. In a press the combination of a reciprocable press member, a shift-able frame member movable to and from a position in the line of movement of said press member, an oscillatory press member, cooperating die members carried by said oscillatory and reciprocable press members, means for actuating the reciprocable press member to impose pressure upon the oscillatory press member, and means for shifting the frame member into and out of supporting cooperation with the oscillatory press member.

3. In a press the combination of a reciprocable press member, an oscillatory press member, a shiftable frame member for sustaining the latter against pressure from the reciprocable press member, means for actuating the reciprocable press member and means for shifting the frame member; there being means associated with said frame and oscillatory press member whereby the latter is oscillated upon shifting of the former.

4. In a press the combination of a base member, a swinging frame member conjoined thereto, -a reciprocable press member operably mounted on the base member, an oscillatory press member operably connected with the frame, and means for swinging the frame member to swing the oscillatory press member to and from a posi tion in the line of movement of the reciprocating press member.

In a press the combination of a base member, a reciprocable press member supported thereon, an oscillatory press member supported on the base, a swinging frame member connected with the base, said frame member being adapted in one position to support the oscillatory press member against pressure from the reciprocable press member, and means for swinging said frame to and from said position.

6. Ina press the combination of a reciprocable press member, an oscillatory press member, cooperating die members carried by said press members, a swinging frame member for supporting the oscillatory press member against pressure from the. reciprocable press member, actuating means for moving said frame member to and from said supporting position, and control means effective to govern operation of said actuating means and of said reciprocable press member.

7. In a press the combination of a re ciprocable press member, an oscillatory press member, cooperating die members carried by said. press members, aswinging frame member'for, sustaining theoscillatory press member against pressu'refro'm the reciprocab-le press member, means for swinging said frame member to move the oscillatory press member to and from pressing position, and control means .tor determining. operation of the reciprocable press member-and of said swinging frame member.

I 8 In a press the, combination of a reciproca-ble press member, an oscillatory press member arranged, to cor-operate therewith in the pressing operation, means for actuating, said press members, and means, operable from the oscillatory press member ,for inhibiting operation. of, the reciprocable press member.

v 9. In a .press the combination of a reciprocable press, member, u an oscillatory press member arranged to co-operate therewith inthe pressing operation, means for actuating said press members periodically and control mechanism, operable automatically to accomplish operation oisaid means.

10 Inlatpress the combination of a movable pressure applyingmember, a pressure receiving member, cooperating diemembers carried-by said members, a.movabl e resistant frame for supporting;the. ,pressure@reoeiving ,member means for noying; said frame, to permit movement of ,the p res sure receiving member, and meansyfor actuating the pressure applying member.

11.,In a press the combination of an oscillatory pressure receiving member, an oscilisigned my name.

- LBERT J. MATTER.

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