TH8380A - Tin tip plate - Google Patents

Abstract

The machine for fabricating reinforced and pressure-resistant end plates from sheet material consists of a cutting ring, a cutting sleeve that fits into the ring for cutting the blank, a pull ring with an axis aligned with the cut sleeve to support the edges of the blank held in place by the cut sleeve, a centering molded ring with a common center that slides within the pull ring and has an end surface shaped for defining the seam surface of the end plate, a compression ring for ejection with a common center that slides within the cut sleeve and has an axis aligned with the centering molded ring so that, during use, the surrounding material of the blank is controlled between the centering molded ring and the compression ring, a center point of the cut that is common centered and slides within the compression ring, and a reforming plate with a common centered and slider within the centering molded ring to grip the center of the blank opposite the center point of the pull-out cut. The end shape of the center point of the cut consists of a rounded nose around which a truncated conical central depression is formed, and the reforming plate consists of a central cylinder sized appropriately for deformation. With the central part of the blank plate surrounding the nose of the center punch and into the basin, and the outer ring separated from the central cylindrical part by a circular basin sized to receive the nose of the center punch, the outer ring has a truncated conical inner surface that flares out from the basin.

Claims (10)

1. A complete machine for forming the end-wall of a can reinforced steel plate, consisting of a cutting ring (11), a cutting stamping sleeve (13) that passes through the ring (11) to remove the steel plate in between, an axially aligned ring (14) called the cutting stamping sleeve (13) to support the outer edge of the steel plate attached to it, a centering ring (15) that is coaxial and sliding within the drawing ring (14) and has a contoured end face to form the joint surface of the end-wall of the can, and an ejector compression ring (19) that is coaxial and sliding within the cutting stamping sleeve and aligned axially with the centering ring. Thus, when in operation, the outer perimeter of the blank is confined between the center ring of the mold and the compression ring of the ejector; the center of the ejector (16) is coaxially and slidingly positioned within the compression ring of the ejector, and the reformed plate (20) is coaxially and slidingly positioned within the center ring of the mold to engage the center wall of the blank opposite to the center of the ejector; in which the end structure of the center of the ejector consists of an annular protruding nose (22) which encloses and forms a truncated conical depression in the center (23), and the reformed plate consists of a central cylindrical section (21), which is sized to deform the center of the blank around the nose (22) of the ejector center and into the depression (23), characterized by the reformed plate also being incorporated by an outer ring (31) that is separated from the central cylindrical section by an annular depression (30) which is sized to accommodate the nose of the ejector center; The outer ring has a truncated cone face facing inward (311;312) which flares outward from the basin (30) to form, with the central cylindrical section (21) of the new forming plate, an entrance with a narrowing width into the basin, here the truncated cone face (311,312) of the outer ring (31), when in the fully elevated position relative to the center ring of the mold (15) in the direction toward the compression ring of the ejector (19), form a smooth continuous surface with the end face of the center ring of the mold and here the outer ring (31) slides axially within the center ring of the mold from its fully elevated position in the downward direction away from the compression ring of the ejector under the influence of the center of the ejector (16). 2. The instrument according to claim 1, whose inner radial walls of the circular basin (30) are made of the cylindrical walls (29) of the cylindrical section (21) of the new forming plate and are made to have a circular notch in the shape of a "V" (32). 3. The instrument under claim 1 or 2, whose inner radial walls of the circular basin (30) are made with the cylindrical walls of the outer ring (31) and which are made with a circular notch (41) at the junction with the truncated conical surface (311;312). 4. A device under any of the claims of Claims 1-3 in which the molded ring (15) has an additional access surface which causes an axial insertion for the outer ring (31) in the fully raised position. 5. The instrument is completed according to one of the preceding claims in which the surface of the truncated cone (312) is inwardly concave radially. 6. The process of fabricating the reinforced and pressure-resistant end cap of the can involves several steps: arranging a flat, blank sheet of metal with a central and surrounding section; deforming the blank sheet in the first stage to separate the central and surrounding sections so that they are at different levels, forming a flared cup shape defined by the central section with a U-shaped channel, a truncated conical wall, and a circular seam plate; and in the second stage of deformation, moving the central section and the circular seam plate towards each other to deform at least a portion of the metal in the truncated conical wall into a "U" shape, eliminating the overhang of the can end cap. During this second stage, the truncated conical wall is progressively pushed radially. 7. The end of the can consists of the outer circumferential wall (25), the wall of the truncated cone (26) which hangs down from the inner circumferential wall of the outer circumferential wall, the overhang displacement line which is generally "U" shaped and extends inward radially from the wall of the truncated cone, the annular wall (34) which extends axially from the inner circumferential wall of the overhang displacement line, and the central wall (18) which is generally flat and is supported in the wall of the truncated cone by what is called the annular wall. Here, the overhang displacement line consists of the first annular section (35) which is a curved cross-section extending from the annular wall (34), the second annular section (36) which is a curved cross-section extending inward from the truncated cone wall (26), and the annular connection. (38) which joins the so-called first annulus to the so-called second annulus, making it characteristic by the truncated conical catch wall including the crooked section (42) which joins the second annulus (36) to the catch wall (26). 8. The end plate of the can, as per claim 7, where the radius of curvature R of the first annular section is greater than the radius of the second annular section. 9. The end plate of the can under claim 7, in which the radius of curvature R of the first annular section (35) is smaller than the radius r of the second annular section (36). 10. The end plate of the can, as per claim 7, herein the bent part (42) is positioned at a certain level in the gripping wall below the level of the middle wall which is generally flat.