NL7807744A - Paint can prodn. method - using cylindrical rolled plate with flanged reinforced lid edge - Google Patents

Abstract

The metal container is made as a cylindrical or conical shape with a pressure resistant lid. The can is used for paint, lacquer, thinner or solvent. A pressure and reinforcement edge is fitted to the upper edge area of the metal can, pointing inwards and flanged over. The edge is made integral with the upper edge area of the can and is turned over both inwards and downwards.

Description

? · '«(* J., ^' T

Hr. 5581

Officine Honfaloonesi E. Passero & C. S.S.L.

TBIEST Italy.

Title: Cylindric conical metal rat with a press cover closure on the ring braked from the rat's body and the matching remanufacturing method.

The invention relates to a metal rat, generally cylindrical or conical, with lid closure which sits on a ring formed from the body of the rat.

The corresponding mode of reflection of such a rat is a subject of the invention because of its inventive particularity.

Tools required for this process are a subject of the invention since they require necessary and adhering components to effect the invention.

The scope of application of the invention includes the manufacture of metal combs, for example cans or buckets, generally cylindrical or conical rorm, r uptake of liquid material, loose rorm or varnish products, rerunners, thinners, various chemical, natural or man-made or other products, having a round top opening with an inside and bottom cover for that purpose, to be closed with a normally conical lid which annoys an annular cover projecting outwardly, which is pressed into said opening ·

Bit type combs, bushes or buckets, are normally made of more or less thick metal sheet or thin metal sheet, which is always thin enough to be easily processed, with a sleeve 50 consisting of a plating, turned or soldered in cylindrical and inverted-conical rorm, from drills and bottom * open, or sheet with a bottom bottom, which is inserted at the bottom edge of the said jacket with a retaining cover, while in the 780 77 44

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In the same way, a ring with a flap inwards and downwards must be soldered in at the top opening, which serves to receive the pressing lid for the canister or bucket to be pressed in. (Canisters are generally cylindrical in shape, while buckets 5 are mostly conical in shape).

The object of the invention is to produce a vessel which corresponds to the type described above, which exhibits the greatest resistance and sealing density and which saves material and, due to the less complicated manufacturing method, causes lower manufacturing costs.

The solution according to the invention mainly consists in that the cover receiving said top ring of the vessel is formed directly from the top edge of the metal sheet or of the jacket, the ring according to the invention being formed by an inwardly directed top cover of the metal sheet or sheath, so that no continuous separation or any joints are formed.

The loss of the joints therefore significantly improves the resistivity, although nowadays the joints are formed perfectly and with the greatest certainty, moreover, the loss of the joints means an obvious saving of the manufacturing costs, since the separate production of the ring and the soldering of these to the jacket is omitted by the formation according to the invention of the ring from the jacket itself.

Moreover, the reduction of the main material occurring in the separate manufacture of the ring is eliminated in the new production method.

Obviously, nothing forbids the manufacture of the vessel by other manufacturing methods, for example, the bottom 50 of this also forms an integral part of the jacket, usually made in press fabrication, so that instead of three composite elements, the body of the vessel consists of only two In each case, the invention consists of one instead of two elements, the invention always requires one less joint, namely that which is omitted by making the top ring from the jacket.

780 77 44! /. '3 *

Other advantages and features according to the invention are apparent from the following detailed description of a preferred embodiment and from the description of the design of a bucket according to the invention under opposite 5 with a similar vessel manufactured in the traditional method and from the accompanying drawings Fig. 1 shows a side view of the part of the bucket concerning the top edge, in partial axis section, as it is currently manufactured with the known technique) Fig. 2 on the same scale as Fig. 1 a known conventional lid for closing the opening of the vessel of figure • 1; figure 3 represents a side view of the complete upright bucket of figure 1 in axis section, which is closed with the lid 15 of figure 2, but is constructed according to the invention; Figures 4-15 show the individual successive stages of the manufacture of a vessel according to the invention.

Figures 1-3 clearly show the full simplicity of the invention, and it could in fact be classified as the egg of Columbus, since manufacturing costs are greatly reduced, without depriving any of its sealing density and resistivity in the vessel, in on the contrary, the guarantee of a good closure is significantly improved by the absence of the joint by joining two separate elements together.

In accordance with the prior art technique of the present invention, the buckets are formed such that the top edge of the casing B is to be connected to a ring A to be inserted by means of an outwardly folded fold of both edges 1, whereby tin-plated metal sheet and other material is used. The ring A has the known shape with a recess 2 and a flap downwards 3, which preferably tends downwards in conical shape, to receive the cover in the fold, as shown in known manner in figure 2, or in a similar manner. manner.

From this it becomes clear that according to the known technique and with all known manufacturing methods of such bucket types, the ring A must be manufactured separately and must be used in the jacket B, which is likewise manufactured separately,

In the special case shown in figure 3, a bucket is shown, the bottom of which, according to the known technique 5, is also manufactured separately and is subsequently inserted in the jacket B or B '. However, this solution is not of importance for the inventive idea, since the jacket B or S 'with the base C as an integral element can be manufactured by punching, which depends on the details of the material used and the manufacturing process.

Moreover, it can be seen that it does not require at least a thicker deep-drawing thin metal sheet in the field not concerned with the solution, and moreover automatically requires a special design and a usually very expensive deep-drawing process with a lot of waste, which is why, even today, often cans and buckets are simply - be manufactured with inserted base C for the sake of convenience.

According to Figure 3, the jacket B has a reinforcing rib 4, which, however, is not always required depending on the function and type of the vessel. Finally, it can be derived from Figure 3 that the top edge 5 of the jacket B * with the shape of the ring A figure 1 corresponds, after a curvature to the outside 6 following a cover inward with a recess 7 and finally a cover downwards, accurately corresponding to the shape 2.3 of the ring Δ of figure 1, so that a traditional lid closes tightly can be set up, as shown in Figure 2, in an unlimited form.

The special manufacturing method of the bucket shown in Figure 3 is carried out in subsequent stages;

Figure 4 is a perspective view of the surface of the square metal sheet or thin metal sheet for developing the mantle of Figure 3.

Figure 3 shows how the metal sheets are rolled with a roller to obtain the roll of Figure 6.

Figure 7 shows the cylindrical shape obtained by soldering the edges on top and bottom, 7807744 5 ·

Figure 8 shows the casing B 'formed in this way, mounted on a dilation die formed by a cylinder 9 with separate expansion inserts 10 in shaped longitudinal sections, which expand according to a known technique during the operation of the cylinder 9, so that the bucket can generally customary inverted conical shape, in which an annular die with a similar groove 11 is arranged at the base, in which the lower edge of the jacket B 'is placed *

The tools and the movement of the outer forming portions 10, together with the support cylinder 9, are intended to effect the downward movement of the portions 10 simultaneously with the flare so that after the flare of the portions 10 shown in FIG. with the formation of the jacket B 'and subsequent retraction of the bottom edge in the annular groove of Figure 11, the bottom cover is formed outwardly 12, while the jacket B' is higher than the portion 10 of Figure 8, and the above the protruding part of the top edge 5 of the jacket B 'is bent inward, as is shown on an enlarged scale in figure 10.

After the end of the working phase shown in Figure 9 and after the retraction of the portion 10, the jacket is removed and vice versa placed on another machine tool 15 with an annular die 14 and an annular curvature 14 ', which with the inward directional wrap 5 of the edge of the mantle B '25 corresponds, with another cylinder 15 running centrally coaxially with the die ring 14, which has a head with portions 16 formed opposite to the shape 14' so that they are annular outwards and downwards drawn to the mold 14, as shown in partial section of Figure 12, from which the phase 30 of shaping the rim 5 (even better and enlarged in Figure 13) is illustrated, the cylinder 15 having its split head 16 perform the following movements: rise upwards, widening of the sections, retraction of the sections of the jacket B * open to the shaping of the edge 5 downwards to the mold 14 ', where After the upward movement of the tool follows 780 77 44 6 J * * and the return of the parts »after which the finally formed jacket B 'is taken out, to which is transferred to figure H, which shows the known inset work of the soil according to the known technique and method, so that it is possible to proceed to Figure 15, which illustrates the soldering of the fittings 17 for hanging the bucket bracket 18 and the insertion of the lid 19, which may be of the type described above, shown in Figure 2 . The shape of the bucket so manufactured is shown in Figure 3.

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Claims (9)

1, Metal vessel with generally cylindrical or conical 5-shape press-lid closure, placed on a ring, which is located at the top edge of the body of the vessel, which serves a normal canister or a bucket of its jugs, liquids or solid material loose form, for example paint, lacquer, thinner, solvent, rusting agent, varnish, etc * ^ etc *, chemical products in general, sealant, powdered material and the like, characterized in that no longer as in the previous In the prior art, the above-mentioned top ring must be placed on the casing of the vessel body, but is removed directly from the mold by a cover from the top edge of the vessel inwards and outwards. Tat according to claim 1, characterized in that the inwardly and downwardly directed cover of the top edge of said jacket of said vessel body has a similar shape as the one manufactured according to the known technique and on the top edge 20 of the general known vessels turned on. 3 * Yat according to claims 1 and 2, characterized in that in front of said cover there is a light curvature (6) outward, which then bends inwards and has a recess (7), to finally extend after the ascent bend said floor 25 downwards (8). Method for the production of a vessel according to the preceding claims, characterized in that it proceeds in fibers to form a jacket which is higher than such a one according to the hitherto known technique. correspond to the radial course of a ring required for attachment to the jacket according to the hitherto known technique, as well as to the annular widening and shape of the solder in a <. cylindrical shape and sheath open at least on the side of the cover, so it can protrude. ........ ..... '........ pn * 780 77 44 I 1 i · I. F '1, 8 * protruding part is bent inwards and the resulting round part downwards, while at the same time a recess is provided in the horizontal part between said first cover inwards and said second cover downwards. Method according to claim 4 *, characterized in that during the execution of said first cover inwards, a rib which corresponds to a curvature and the outwardly bent edge is simultaneously formed. 6. Method according to claims 4 and 5, characterized in that while the first cover is manufactured inwards, the jacket is simultaneously given its final shape by widening and with the possible annular lateral ribs (figure 9). Vessel shaping tool according to any one of the preceding claims and according to the method according to claim 6, characterized in that it is formed by an expansion cylinder (9) which is axially movable and movable shaped parts (10) with which, apart from the outer shape, also form the top edge (5) by means of widening (Figure 10). Ring shaping tool forming the inner envelope of the vessel according to claim 4, characterized in that it consists of an annular die (14) having an annular elevation (14 *) which bucket penetrating working head with expandable portions (16) cooperates and is pulled toward and against said counter-shaping die to form the required said annular inner rim (5), as illustrated in Figures 11, 12, 1J. Vessel, method and tool according to previous claims, 780 77 44