US2286721A - Press with plate type frame - Google Patents

Description

June 16,1942.

w. ERNST PRESS WIT?! PLATE'TYPE ERNIE. v

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Atzom xs' j Patented June 16, 1942 PRESS WITH PLATE TYPE FRAIHE Walter Ernst, Mount Gilead, Ohio, assignor to The Hydraulic Development Corporation, Inc.,

a corporation Delaware Application April 8, 1938, Serial No. 200,964

1 Claim.

This invention relates to presses, and in particular, to frame constructions for presses.

One object of this invention is to provide a press having a frame wherein the head, bed and side members engage one another by means of a plurality of projections or lugs.

Another object is to provide a press wherein the head and bed are provided with projections or lugs passing through recesses in plate-like side members so that the thrust of the press is transferred to the side members in straight lines longitudinally along the side members, and substantially without transverse thrust components.

Another object is to provide a press having a head and bed which are provided with lugs seated in correspondingly shaped recesses or apertures in plate-like side members forming the strain elements interconnecting the head and bed. so that the working thrusts are transferred to the plate-like side members in substantially rectilinear directions without oblique or transverse thrust components.

In the drawings:

Figure 1 is a front elevation of a press having a frame construction according to the invention.

Figure 2 is a right-hand side elevation of the press shown in Figure 1.

Figure 3 is a horizontal section along the line 33 in Figure 1.

Figure 4 is a horizontal section along the line 4-4 in Figure 1.

Figure 5 is a front elevation of a modification of Figure 1, with a downwardly moving plunger.

In general, the press of this invention includes a head and a bed having projecting lugs engaging correspondingly shaped recesses in the side members. These sidemembers are in the form of heavy steel plates, and receive the thrusts created by the action of the platen of the press. In the present invention these lugs pass entirely through the side plates and thereby transmit the thrusts in longitudinal straight lines to the side members. In this manner ob lique thrusts or outward components are eliminated, so that there is no tendency for the side members to bend outwardly or become distorted during the operation of the press. Where the lugs on the head or bed pass only partially through the side plates and not entirely through them, an eccentric condition exists as to the lines of stress so that the end portions of the side plates tend to be pulled outwardly. In the present construction, however, where the lugs pass entirely through the side plates, the result is a straight pull on the side plates and therefore there is no tendency to distort them.

Referring to the drawings in detail, Figures 1 and 2 show one embodiment of this invention, employing an upwardly-acting plunger. -The press of Figure 1 consists of a bed It) and a head ll having lugs or projections l2 and i3, respectively. These lugs engage recesses I4 and i5, re-

spectively near the lower and upper ends of the frame side members IS. The stresses are transmitted through these connections between the lugs l2 and I3 and the recesses l4 and t5, the parts being nominally held together by the cap screws II. The latter, however, are not depended upon to transmit thrust but merely serve as connecting members to hold the parts in assembly. In the press shown in Figures 1 and 2 the lugs l2 and I3 are disposed substantially in intermediate positions at the ends of the bed l0 and head II.

The bed It) is provided with a cylinder l8, within which a plunger l9 reciprocates to move a platen 20 secured thereto. The platen 20 moves upwardly against the head H in order to perform a pressing stroke, and is guided in its reciprocation by side plates 2| with beveled'portions 22 engaging the correspondingly beveledportions 23 at the corners of the platen 20 (Figure 4). The side plates 2| are secured by the cap screws 24 in recesses 25 in the side members l6. Leakage around the main plunger l9 ls-prevented by means of aconventional gland-construction, generally designated 26. The details of the control mechanism of the press form no part of the present invention, and any desiredmain plunger 46 is mounted in a cylinder 41 within the head I I rather than within the bed ID, as in the previously illustrated constructions.

The platen 48, therefore, moves in a downward direction instead of in an upward direction, as in the other forms of presses hitherto described.

It will be understood that I desire to comprehend within my invention such modifications as come within the scope of the claim and the invention.

Having thus fully described my invention,

what mum as'new and desire to secure by Letters Patent, is:

A vertical press comprising a press head. a press bed, and side members, said side members having recessed portions with the openings of said recesses directed towards the respective planes of the vertical edges thereof, said head and bed each being reduced at their sides to provide projections lying intermediately of their tops and bottoms, and vertical side walls above and below said projections, said projections extending entirely through the respective recessed portions of said side members and adapted to be supported by walls of said recesses, and said vertical side walls above and below said projections being entirely in contact with said side members.

WALTER ERNST.

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