US1671647A - Press platen or the like - Google Patents

Description

L. MCCARTHY PRESS PLATEN on THEl LIKE May 29, 1928. 1,671,647

Fil Au 1924 2 Sheets--Slxeetl 1 ATTDRNEY- May 29, 1928. 1,671,647 l.. MocARTHY PRESS PLATEN OR THE LIKE Patented May 29j,` 1928.

UNITED STATES i fx N 1,611,641 PATENT oFFlcE.

Louis MccARTHY, oF BOSTON, MASSACHUSETTS, ASSIGNOR To THE MAOALLEN COM- PANY, or BOSTON, MASSACHUSETTS, A CORPORATION OF MASSACHUSETTS.

PRESS PLATEN i013',` THE LIKE.

Application mea August 30,1924. seriai No. 735,201. j

This invention relates to hollow metal Aplates or plate-like articles, and especially,

although not exclusively, to composite platesl or platens for use in hydraulic and S1milar presses and `having interior cavities or passages for the circulation of a heating or cool` lng fluid, such as steam,o1l, or water.

Platens of `this type have ,j heretofore usually been made of castironcored out to form the fluid passages. i Such platens are of short life, are brittle `and easily broken, will stand only relatively low pressures, are necessarily thick andheavy, are troublesome to handle aswell as taking up undue 'space in` even heating. Furthermore, in coring such platens, openings are formed by the ends of the cores which openings must be carefully plugged in order to avoidy leakage at these points. i A, i

In an attempt lto avoid certain of these difliculties, it has heretofore been proposed to forma composite plate or laten in two sections which are subsequent y riveted together, face to face, by rivets extending all the way through both sections. Such a platen is of somewhat longer life than a casts iron platenand is thinner and lighter, so as to be handled more easily, take up less space inthe press, and heat and cool more quickly. Such a platen cannot, however, be subjected to high internal pressures without opening the riveted joints kso `as to permit leakage, while therivet heads interrupt the continuity of the faces of the platen, so as to mar the work, and, if of sufficient number to hold the parts together with any degree of security obstruct the fluid passages within the platen and seriously interfere with the circulation of the heating or cooling Huid.

The present invention has forv its primary object to provide a platen which will be free from all of the objectionable features of the types above referred to, which may be composed Of steel or any other suitable metal, which is of unitary construction and practically indestructible, which will withstand, without breakage or leakage, substantially any ,internal or eizternal pressure to which such a device likely to be subjected, which isrclatively thin and light, and which provides `a continuous, unobstructed, tortuousy passage for the thorough circulation of the heating or cooling medium and presents a smooth and` uninterrupted surface for engagement with the work.

The foregoing and other Objects of the invention will best be understoodfrom the following description of a platen made in accordance with the invent-lon and of the several steps by which its manufacture is accomplished'. It will be understood, however,

that the particular constructions and operations illustrated `and described have been chosen for purposes `of exemplification merely, and that the invention, as defined by the claim hereunto appended, `may be otherwise embodied and practiced without departure from the spirit and scope thereof.

In said drawings:

Fig. l is a somewhat conventonalizcd view of a portion of a hydraulic press in which are used platens of the type to which the in vention primarily relates. y

Fig-2 is an inside face view of one of the members or sections of which the complete composite plate or platen 1s com osed.

F1g,.3 is an end view of` the p ate member shown in Fig. '2.

. Figs. 4, 5 and 6 are sections taken substantially on the lines H, 5-5, and 6-6, Fig. 2. p w

Fig. 7 is a partial side elevation of the plate member shown in ig. 2. i

FigyS is an inside face view of the other plate `member or sect-ion. i Fi 9 is anend view of the plate member s iown inFig. 8. j

Fig. 10 `isa plan `view illustratingthe as sembling of the members Or sections shown in Figs. `2 and 8. j

' Fig. l1 is an end view of the assembled plate member.

Fig. l2 is a transverse section thereof.

Fig. 13 is a fragmentary perspective view illustrating the Welding together of the edges of the plate member. v

Fig. 14 is an enlarged detail sectional view, taken substantially" on the line 1li-+14, Fig. 10, of the completed platen.

In Fig. l is` Shown somewhat diagrammatically a portion of hydraulic press having aibed or stationary element 20 and a -cooperating ,movable element4 21 carried. by a ram 22 and guided by posts 23 rising from the bed 20. Interposed between the elements 20 and 21 are two or more platens 24 between which are placed the sheets or other articles 25 to be operated upon by the press, said platens having interior cavities or passages for the circulation of steam, water or other heating or cooling fluid supplied thereto through branch pipes 26 from `a header 27.

As shown in Figs. 2 to 14, each platen 24 is composed of two members or sections, including a body member or section 28 (Figs. 2 to-7 and 10 to 14) and a cover lnember or section 29 (Figs. 8 to 14), said members or sections being formed and assembled into a unitary composite plate structure as hereinafter described. The members or sections 28 and 29 are preferably composed of steel, or may be of any other metal, suitable to the requirements. v

The inner surface of the body member 28, or that surface thereof which, inthe completed platen, is disposed toward the cover member 29, is provided with a cavity be tween the plate members in the form of a continuous tortuous )assage 30 lpreferably composed of a plurality of parallel longitudin'al open `grooves 31 connected alternately adjacent opposite ends of the plate by connecting grooves 32 and separated by parallel partitions 33 each of which extends from one of the connecting grooves 32 to the opposite end ofthe plate. The grooves 31 are preferably of an even number, so that both ends of the passage 30 are located adj acent one end of the plate, at which Qoints said plate is formed with tapped openin s 34 for the attachment of the branch supp y pipes 26. While the passage'30, partitions 33, and openings 34 ma be otherwise formed, the surface of the pllate member 28 is preferably machined to form the grooves 31v and 32, leaving the partitions 33, and vthe openings 34 drilled in the end of the plate to communicateV with the ends of the passage 30. The surface of the member is further machined to form parallel undercut or dove-tailed ribs 35, said ribs preferably following the partitions 33, beingy interrupted opposite the connectingV grooves 32, but comprising portions 36 at the ends of the members beyond said grooves. The edges of the member 28 are preferably chamfered, as shown at 37, for a purpose presently to be explained.

The innerface ofthe cover plate 29, or that which, in the finished platen, is disposedl toward thebody plate 28, is also preferablyymachined to form a series of parallel undercut grooves 38 complementary to the ribs 35,36 of the body plate 28, corresponding vin number and arrangement thereto, and of a size to receive the same with a close drive lit. The edges or the plate member 29 are also chamfered, as shown at 39, to

wedded together throughout their length,

preferablyby burning or fusing a strip of metal 40 (Fig. 13) in the groove formed by the cham ered edges 37and 39 by means of an Oxy-acetylene flange 41 toy form a welded joint 42 (Figs. 13 and 14).

)Vhen a platen thus produced is put yintouse,l and steam or water admitted to the passage 30, the driven` interlocked joints formed by the ribs 35, 36 and grooves 38 quickly rust together, `forming a substantially unitary connection at these points in addition to vthe welded vconnection at the edges of the plate members. The platen thus becomes `a substantially unitary structure which is adapted to withstand extremely high internal as well as external pressures without failure orleakage. By reason of its con-` struction and" modeof production the platen can be composedof suitable steel,` and is therefore of long life and may be made relatively light and thin, so as vto be easily handled and to'take up relative small space in the press, nearly `doubling the capacity 0i the latter as comparedto a castiron platen. Moreover, the thinness of the platen enables it to be heated or cooled quickly and easily, it being observedthat'the passage 30 extends substantially throughout the length and width of the platen and is continuous from one opening 34V to the other, so that fiuid'admitted at oneof said openings must pass lon itudinally throurhout the entire length o the passage to the other opening without sihility of leakage romj one branch o said passage to another, thereby circulating throughout the entire body of the platen. It willy also be observed that the passage `3() is of substantially constant crosssecti0nal1 area throughout, beingunobstructed by rivets, and that the surfaces ofthe platen designed for contact with the work25 are smooth and unbroken throughout. Since the passage 30 is formed as an open groove on one face of the body plate member 28, its position may be accurately determined, so that the thickness of the walls may be made constant andI of any desired amount.

While, as abovey pointed out, the invention is primarily applicable to press platens, it will be obvious that it is .by no means limited thereto but might readily be em lll lll

lll

ployed in connection with other devices,

such, for example, as steam tables, heated molds, ete., and I Wish it distinctly linderstood that such other uses and applications ot the invention are lully contemplated 1n the definition of the latterby the following claim.

Having thus described my invention, I Claim:

A composite hollow steel plate, primarily intended :for use in presses,v and composed of two fiat members having between them a continuous, tortuous, fluid passage provided being?T sealed externally by a continuous Welded joint.

In testimony whereof I affix my signature.

LOUIS MCCARTHY.

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