EP0109986B1 - Nachgezogener Metallbehälter mit Umkreisverbindung - Google Patents
Nachgezogener Metallbehälter mit Umkreisverbindung Download PDFInfo
- Publication number
- EP0109986B1 EP0109986B1 EP19820306178 EP82306178A EP0109986B1 EP 0109986 B1 EP0109986 B1 EP 0109986B1 EP 19820306178 EP19820306178 EP 19820306178 EP 82306178 A EP82306178 A EP 82306178A EP 0109986 B1 EP0109986 B1 EP 0109986B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- lower member
- seam
- open end
- draw
- vessel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
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- 239000002184 metal Substances 0.000 title claims description 45
- 229910052751 metal Inorganic materials 0.000 title claims description 45
- 238000010409 ironing Methods 0.000 claims description 36
- 239000000853 adhesive Substances 0.000 claims description 23
- 230000001070 adhesive effect Effects 0.000 claims description 23
- 229910000831 Steel Inorganic materials 0.000 claims description 11
- 239000010959 steel Substances 0.000 claims description 11
- 239000002966 varnish Substances 0.000 claims description 8
- 229910019142 PO4 Inorganic materials 0.000 claims description 6
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims description 6
- 239000010452 phosphate Substances 0.000 claims description 6
- ZCDOYSPFYFSLEW-UHFFFAOYSA-N chromate(2-) Chemical compound [O-][Cr]([O-])(=O)=O ZCDOYSPFYFSLEW-UHFFFAOYSA-N 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 4
- 229920005992 thermoplastic resin Polymers 0.000 claims description 4
- 238000002844 melting Methods 0.000 claims description 3
- 230000008018 melting Effects 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 2
- 230000001681 protective effect Effects 0.000 claims description 2
- 238000004381 surface treatment Methods 0.000 claims description 2
- 239000003973 paint Substances 0.000 description 19
- 239000005028 tinplate Substances 0.000 description 17
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 8
- 239000012790 adhesive layer Substances 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 8
- 239000011248 coating agent Substances 0.000 description 7
- 238000000576 coating method Methods 0.000 description 7
- 239000010410 layer Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- 239000004593 Epoxy Substances 0.000 description 5
- 229920001577 copolymer Polymers 0.000 description 5
- 238000004826 seaming Methods 0.000 description 5
- 229920005989 resin Polymers 0.000 description 4
- 239000011347 resin Substances 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 description 4
- 229910001887 tin oxide Inorganic materials 0.000 description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 3
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 3
- 235000013405 beer Nutrition 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 235000014171 carbonated beverage Nutrition 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000035939 shock Effects 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 3
- 239000004925 Acrylic resin Substances 0.000 description 2
- 229920000178 Acrylic resin Polymers 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 150000002148 esters Chemical class 0.000 description 2
- QQVIHTHCMHWDBS-UHFFFAOYSA-L isophthalate(2-) Chemical compound [O-]C(=O)C1=CC=CC(C([O-])=O)=C1 QQVIHTHCMHWDBS-UHFFFAOYSA-L 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- -1 polyethylene terephthalate Polymers 0.000 description 2
- 230000002269 spontaneous effect Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229920001187 thermosetting polymer Polymers 0.000 description 2
- XFNGYPLLARFULH-UHFFFAOYSA-N 1,2,4-oxadiazetidin-3-one Chemical compound O=C1NON1 XFNGYPLLARFULH-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229920000089 Cyclic olefin copolymer Polymers 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- JHWNWJKBPDFINM-UHFFFAOYSA-N Laurolactam Chemical compound O=C1CCCCCCCCCCCN1 JHWNWJKBPDFINM-UHFFFAOYSA-N 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 229920000571 Nylon 11 Polymers 0.000 description 1
- 229920000299 Nylon 12 Polymers 0.000 description 1
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 210000003298 dental enamel Anatomy 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 238000003618 dip coating Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000009503 electrostatic coating Methods 0.000 description 1
- QHZOMAXECYYXGP-UHFFFAOYSA-N ethene;prop-2-enoic acid Chemical compound C=C.OC(=O)C=C QHZOMAXECYYXGP-UHFFFAOYSA-N 0.000 description 1
- 239000010408 film Substances 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 229920000554 ionomer Polymers 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000004922 lacquer Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 229920005672 polyolefin resin Polymers 0.000 description 1
- 229920000874 polytetramethylene terephthalate Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
- 229920003051 synthetic elastomer Polymers 0.000 description 1
- 239000005061 synthetic rubber Substances 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
- 238000009966 trimming Methods 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D1/00—Containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material, by deep-drawing operations performed on sheet material
- B65D1/22—Boxes or like containers with side walls of substantial depth for enclosing contents
- B65D1/26—Thin-walled containers, e.g. formed by deep-drawing operations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D7/00—Containers having bodies formed by interconnecting or uniting two or more rigid, or substantially rigid, components made wholly or mainly of metal
- B65D7/12—Containers having bodies formed by interconnecting or uniting two or more rigid, or substantially rigid, components made wholly or mainly of metal characterised by wall construction or by connections between walls
- B65D7/34—Containers having bodies formed by interconnecting or uniting two or more rigid, or substantially rigid, components made wholly or mainly of metal characterised by wall construction or by connections between walls with permanent connections between walls
- B65D7/38—Containers having bodies formed by interconnecting or uniting two or more rigid, or substantially rigid, components made wholly or mainly of metal characterised by wall construction or by connections between walls with permanent connections between walls formed by soldering, welding, or otherwise uniting opposed surfaces
Definitions
- the present invention relates to a metal vessel having a circumferential side seam, which is formed by lap-bonding of open end portions of upper and lower members by means of an adhesive, the lower member comprising a tall thin wall portion, a thick bottom portion and an open end portion and the upper member comprising a short side wall, a top wall, a spout having a diameter smaller than that of the side wall and an open end portion.
- EP-A-0 048 890 discloses a metal vessel of the general type with which the invention is concerned, as defined above.
- So-called draw-ironed cans are widely used for contents having a spontaneous pressure, such as beer and carbonated drinks.
- draw-ironed cans are prepared by draw-forming a metal blank punched in a disc or the like between the drawing punch and a drawing die to form a cup and ironing the side wall of the formed cup between an ironing punch and an ironing die to reduce the thickness of the side wall.
- the structurally weakest portion of a draw-ironed can is the portion double-seamed to a can end, and when the can receives shocks on falling or the like, this portion is broken or leakage is caused in this portion.
- Another object of the present invention is to provide a draw-ironed metal vessel of a tin-plated steel plate in which there is not a portion double-seamed to an end and the sole seam present in the vessel is a circumferential side seam formed by lap-bonding of open end portions of two confronting seamless cups.
- Still another object of the present invention is to provide a draw-ironed metal vessel of a tin-plated steel plate, which has a smaller thickness of the side wall portion than in the conventional draw-ironed tin-plated steel plate cans and is excellent in the light-weight characteristic, the pressure resistance and the shock resistance and which can easily be disposed of because of a high easy crushability.
- a further object of the present invention is to provide a draw-ironed metal vessel formed by draw-ironing of a tin plated steel plate, which has a circumferential side seam excellent in the bonding property and in which the adhesion of a coating is high.
- the metal vessel of the present invention is characterised in that said lower member is formed by draw-ironing a tin-plated steel plate at an ironing ratio (R,) of at least 20%, said ironing ratio (R 1 ) being defined by the following formula: wherein T B is the thickness of the bottom portion of the lower member and T w is the thickness of the side wall portion of the lower member, said lower member being subjected to a surface treatment with phosphate and/or chromate and having a protective varnish on the entire surface thereof, said upper member is formed by shallow drawing of a protecting varnish-coated tin-plated steel plate, the adhesive is a heat-fusion-bondable thermoplastic resin having a melting point or softening point of 130 to 240°C, and that the lap-bonding is conducted by heating to fuse the adhesive of the seam and cooling the seam.
- R ironing ratio
- a draw-ironed metal vessel comprises a lower member 1 formed of a seamless molded cup of a tin-plated steel plate and an upper member 2 formed of a seamless molded cup of a metal. These molded cups are integrated in the form of a vessel by lap-bonding open end portions 3 and 4 to form a circumferential side seam 5.
- the lower member 1 comprises a tall thin side wall portion 6 formed by deeply draw-ironing a tinplate blank and a thick bottom portion 7 which is not substantially ironed.
- the upper member 2 comprises a short side wall 8 formed by shallow drawing of a tinplate blank and a top wall 9.
- the height of the side wall portion 8 of the upper member 2 is equal to or slightly larger than the width of the seam 5.
- the top wall 9 of the upper member 2 has a convex taper face, and a spout 10 for charging and discharging the content is formed at the center of the top wall 9.
- the upper member 2 is bonded in the form of a shoulder and neck of a so-called bottle to the lower member 1.
- the open end portion 3 of the lower member 1 is drawn by necking-in of the adjoining portion so that the diameter is smaller than that of the other barrel wall portion, and the open end portion 3 is fitted and inserted in an open end portion 4 of the upper member 2 having a larger diameter.
- An adhesive layer 11 is formed between the outer surface of the open end portion 3 of the lower member and the inner surface of the open end portion 4 of the upper member to effect bonding and integration of the upper and lower members. From the viewpoint of the corrosion resistance, it is preferred that a part of the adhesive 11 be protruded from the seam 5 to form a coating layer 13 for a cut edge 12 of the tinplate blank located on the inner side of the seam.
- the side wall 6 of the lower member constituting a main part of the barrel portion of the vessel is ironed so that the ironing ratio R, defined by the following formula: wherein T stands for the thickness of the bottom of the molded cup T w stands for the thickness of the side wall of the molded cup, is at least 20%, preferably 30 to 80%.
- the tinplate vessel of the present invention is characterized in that, as pointed out hereinbefore, the side wall constituting a main part of the barrel portion of the vessel is highly ironed and the thickness is reduced, the sole seam present in the vessel is a circumferential side seam, and this seam is formed by lap bonding.
- the buckling tendency is obviated at the sealing step.
- the axial load applied to the vessel barrel is in the range of 50 to 100 Kg and is smaller than about 1/2 of the axial load applied at the double-seaming step. Therefore, the buckling tendency is considerably reduced as compared with the case of double seaming.
- the circumferential side seam present in the tinplate vessel of the present invention is formed by lap bonding having a high resistance against a load applied in the axial direction. Accordingly, the structure of the vessel of the present invention is highly resistant to pressures or shocks. In case of double seaming, bonding by folding (lock seaming) or butt bonding, if the thickness of the blank is small, the blank constituting the seam is first deformed by the load applied to the seam, and because of this deformation, leakage at the seam or breakage of the seam is caused under a relatively small load.
- the thickness of the main portion of the barrel of the tinplate vessel is reduced by high ironing, the weight of the vessel per unit volume is drastically reduced and the material metal cost can be lowered. Further, in the barrel portion of the vessel of the present invention, a fresh metal face is exposed to the outside by high ironing, and therefore, the adhesion to a protecting paint and the adhesion to an adhesive used for formation of a seam are highly improved. This is another advantage attained by the present invention.
- tinplate blank for formation of the vessel of the present invention tinplate having tin deposited in an amount of 0.1 to 1.0 Ib/B.B. on one surface is preferably used.
- the deposited tin layer may be one subjected to a remelting treatment (reflow plate or bright plate), or it may not be subjected to this treatment (non-reflow plate or matt plate).
- a tinplate blank is relatively difficult to bond by an adhesive.
- a tin oxide layer should naturally be formed in the surface portion of the deposited tin layer. This tin oxide layer is poor in the mechanical strength and is brittle. Accordingly, it is believed that in a vessel formed by bonding such tinplate by an adhesive, the tin oxide layer present in the bonding interface is readily peeled, resulting in drastic reduction of the bonding strength.
- the side wall portion of the upper or lower member, to be formed into a circumferential seam is subjected to a drawing processing or a high ironing processing, peeling of the tin oxide layer and exposure of a fresh metal surface are effected, and therefore, the adhesion or bonding property to an adhesive or primer is highly improved.
- a tinplate blank such as mentioned above is punched into a disc or the like and is subjected to one-stage or multi-stage drawing between a drawing punch and a drawing die, and multi-stage ironing is carried out between an ironing punch and an ironing die.
- Drawing and iron conditions are known, and drawing and ironing can be accomplished very easily according to known procedures while controlling the ironing ratio in the above-mentioned range.
- the thickness of the tinplate blank to be processed be 0.2 to 0.5 mm, especially 0.2 to 0.35 mm, though the preferred thickness is varied more or less according to the size of the final vessel, and it also is preferred that the thickness T w of the side wall portion formed by ironing be 0.05 to 0.20 mm, especially 0.06 to 0.17 mm, while the ironing ratio is in the above-mentioned range.
- the ironing ratio of the open end portion of the cup to be subjected to a necking-in treatment is lower by 5 to 30% than the ironing ratio of the other side wall portion, this portion is advantageously prevented from being damaged at the necking step.
- a method in which the ironing operation is performed in at least three stages while gradually narrowing the clearance between a punch and a die and the open end portion is prevented from being ironed at the ironing step of the final stage.
- the operation of necking-in the draw-ironed cup is carried out so that the upper and lower members come to' liave such sizes that they are precisely fitted together.
- the outer diameter r, of the open end portion to be located on the inner side of the circumferential lap bonding to be formed, the inner diameter r o of the other open end portion to be located on the outer side of the circumferential lap bonding and the thickness d A of the adhesive layer to be interposed between both the open end portions are selected so that the relation of r o -r l ⁇ d A is established, both the open end portions always press the adhesive layer and tight bonding and assured sealing at the seam become possible.
- the draw-ironed molded cup is subjected to trimming and after washing if necessary, the cup is subjected to a surface chemical treatment with a phosphate and/or a chromate. Then, an anti-corrosive protecting varnish is applied to at least the inner surface of the cup.
- the phosphate and/or chromate treatment may be seen that P and/or Cr is deposited in an amount of 1 to 2, mg/m 2 as the atom on the surface of the deposited tin layer.
- the edge of the open end portion of the cup should naturally be treated, and even if this open end portion is located on the inner side of the seam and exposed to the packed content, it shows a high corrosion resistance.
- the adhesion to an adhesive is improved and also the adhesion of a paint or resin coating to be applied later is improved.
- thermosetting and thermoplastic resins for example, modified epoxy paints such as phenol-epoxy paints and amino-epoxy paints, vinyl and modified vinyl paints such as vinyl chloride/vinyl acetate copolymer paints, saponified vinyl chloride/vinyl acetate copolymer paints, vinyl chloride/vinyl acetate/maleic anhydride copolymer paints, epoxy-modified epoxyamino-modified vinyl resin paints and epoxy-modified epoxyphenol- modified vinyl resin paints, acrylic resin paints, and synthetic rubber paints such as styrene-butadiene copolymer paints.
- modified epoxy paints such as phenol-epoxy paints and amino-epoxy paints
- vinyl and modified vinyl paints such as vinyl chloride/vinyl acetate copolymer paints, saponified vinyl chloride/vinyl acetate copolymer paints, vinyl chloride/vinyl acetate/maleic anhydride copolymer paints,
- paints are applied in the form of an organic solvent solution such as a lacquer or enamel or an aqueous dispersion or solution by spray coating, dip coating, electrostatic coating or electrophoretic coating.
- organic solvent solution such as a lacquer or enamel or an aqueous dispersion or solution
- spray coating dip coating
- electrostatic coating electrophoretic coating
- the coating is baked according to need.
- the shallowly drawn cup as the upper member is formed by shallowly drawing a metal blank, to which a varnish as mentioned above has been applied in advance, by using a pressing mold or a combination of a drawing punch and a drawing die. Then, the top wall of the formed cup is punched to form an upper member having a pouring mouth.
- Lap bonding of the upper and lower members is accomplished by using an adhesive.
- an adhesive is applied to at least one of the open end portions of the lower and upper members to be bonded and both the open end portions are fitted together.
- a heat-fusion-bondable thermoplastic resin having a melting or softening point of 130 to 240°C is used as adhesive.
- nylon type adhesives such as nylon-13, nylon-12, nylon-11, nylon-6,12 and copolyamides and blends thereof
- polyester adhesives such as polyethylene terephthalate/isophthalate and polytetramethylene terephthalate/isophthalate
- olefin adhesives such as an acid-modified olefin resin, and ethylene/acrylic acid ester copolymer, an ion-crosslinked olefin copolymer (ionomer) and an ethylene/vinyl acetate copolymer.
- the adhesive is applied in the form of a film, powder, dispersion or solution to each of the open end portions to be bonded to form a heat-bondable adhesive layer uniformly along the entire circumference of the open end portion.
- the open end portion to be located on the outer side of the seam is heated to increase the diameter or the open end portion to be located on the inner side of the seam is cooled to diminish the diameter, whereby the fitting of both the members is facilitated. If this means is adopted, the fitting can easily be accomplished even when the relation represented by the above-mentioned inequality is established among the outer diameter of the inner end edge, the inner diameter of the outer end edge and the thickness of the adhesive layer.
- the seam is heated to fuse the adhesive layer, and the seam is cooled to effect bonding and sealing on the seam. Since the adhesive layer is fused at this step in the state where the adhesive layer is pressed in both the end edge portions bonding and sealing on the seam can be accomplished completely. Heating of the seam is advantageously performed by high frequency induction heating.
- the side wall portion of the lower member is highly drawn in the foregoing embodiment, there may be adopted a modification shown in Fig. 2 in which the upper member 2a is a draw-ironed cup comprising a tall thin side wall portion 8a formed by highly draw-ironing a metal blank and a thick top wall 9a which is not substantially ironed and the lower member 1 a is a shallowly drawn cup comprising a short side wall 6a formed by shallowly drawing a metal blank and a bottom wall 7a.
- the lower member 1 is a draw-ironed cup as shown in Figs. 1 and 2
- the upper member 2b is a draw-ironed cup comprising a tall thin side wall portion 8b formed by highly draw-ironing a metal blank and a thick top wall 9b which is not substantially ironed, and the open end portions of both the draw-ironed cups are lap-bonded.
- a tall metal vessel in which the thickness of the entire side wall portion is reduced by ironing of a high ratio.
- the vessel of the present invention is valuable as a vessel for a content having a spontaneous pressure such as a carbonated drink, beer or brown liquor or as an inner pressure vessel in which a content is packed together with nitrogen gas or liquefied nitrogen.
- the vessel of the present invention is advantageous over a similar can formed of aluminum in that the rigidity is high and the vessel is excellent in the shape-retaining property and the deformation resistance.
- a bright tinplate (temper of T-2; tin coating weight of #50/50) having a thickness of 0.30 mm was punched into a disc having a diameter of 120 mm, and the disc was formed into a cup having an inner diameter of 85 mm between a drawing punch and a drawing die according to customary procedures.
- the cup was subjected to re-drawing and was then ironed at an ironing ratio of 65.0% by an ironing punch having a diameter of 65.3 mm and an ironing die.
- the so-formed lower member was subjected to panelling and necking-in by using known means.
- the dimensions and physical values of the lower member were as follows.
- the inner and outer surfaces of the resulting lower member were degreased and washed, and the lower member was subjected to a phosphate treatment (4 mg/m 2 of P as the atom was deposited on the tin-plated surface). Then, a white coat composed of a modified acrylic resin was applied to the outer surface of the lower member except an area of a width of about 5 mm from the open end portion, and the outer surface of the lower member was printed. Then, an epoxy ester type finish varnish was applied to the entire outer surface inclusive of the open end portion and was baked. Then, an epoxy urea type paint was applied to the inner surface of the lower member and was baked.
- thermoplastic organic adhesive was applied to a circumferential portion having a width of about 5 mm from the open end portion in the lower member according to customary procedures.
- a bright tinplate (temper of T-1; tin coating weight of #50/50) having a thickness of 0.23 mm, on both the surfaces of which an epoxy ester type paint had been coated and baked in advance, was punched into a disc having a diameter of 90 mm and was then press-formed according to customary procedures. Finally, a liquid-spout was formed on the resulting upper member.
- the upper member was fitted with the lower member to which the adhesive had been applied in the circumferential form and they were heated at about 220°C to fuse the adhesive and were then cooled to effect bonding and form a metal vessel.
- the dimensions and physical values of the metal vessel comprising the upper and lower members were as follows.
- the metal vessel was cold-packed with (A) cola, (B) beer or (C) artificial carbonated drink, and the spout was sealed. Then, the packed vessel was heat-sterilized under conditions shown in Table 1.
- a draw-ironed metal vessel having a circumferential side seam was prepared in the same manner as described in Example 1 except that a bright tinplate having a thickness of 0.27 mm was used and the ironing ratio R, of the side wall portion of the lower member was changed to 72.2%.
- a draw-ironed metal vessel was prepared in the same manner as described in Example 2 except that a brighttinplate having a thickness of 0.20 mm was used and the ironing ratio R, of the side wall portion of the lower member was changed to 75%.
- a metal vessel was prepared in the same manner as described in Example 1 except that a drawn lower member was formed by subjecting a bright tin-deposited steel plate (temper of T-2; tin coating weight of #50/50) having a thickness of 0.20 mm to drawing and re-drawing according to customary procedures.
- a bright tin-deposited steel plate temper of T-2; tin coating weight of #50/50
- a metal vessel was prepared in the same manner as described in Example 1 except that the phosphate treatment was not carried out. The bonding strength of the metal vessel was measured. The obtained results are shown in Table 2.
- Metal vessels were prepared in the same manner as described in Example 1 except that the ironing ratio R of the lower member, represented by the following formula: was set at 5 points in the range of from 10 to 80% and the T value was adjusted so that the T w value was finally equal.
- the ironing ratio R of the lower member represented by the following formula: was set at 5 points in the range of from 10 to 80% and the T value was adjusted so that the T w value was finally equal.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Ceramic Engineering (AREA)
- Rigid Containers With Two Or More Constituent Elements (AREA)
Claims (3)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE8282306178T DE3275641D1 (en) | 1982-11-19 | 1982-11-19 | Draw-ironed metal vessel having circumferential side seam |
EP19820306178 EP0109986B1 (de) | 1982-11-19 | 1982-11-19 | Nachgezogener Metallbehälter mit Umkreisverbindung |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP19820306178 EP0109986B1 (de) | 1982-11-19 | 1982-11-19 | Nachgezogener Metallbehälter mit Umkreisverbindung |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0109986A1 EP0109986A1 (de) | 1984-06-13 |
EP0109986B1 true EP0109986B1 (de) | 1987-03-11 |
Family
ID=8189836
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19820306178 Expired EP0109986B1 (de) | 1982-11-19 | 1982-11-19 | Nachgezogener Metallbehälter mit Umkreisverbindung |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0109986B1 (de) |
DE (1) | DE3275641D1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2016007151A1 (en) * | 2014-07-09 | 2016-01-14 | Umm Al-Qura University | Cooling receptacle for vaccine bottles |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2003101845A2 (en) * | 2002-06-03 | 2003-12-11 | Alcan International Limited | Two piece container |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3815535A (en) * | 1972-12-14 | 1974-06-11 | Schwaab W Lackfab Kg Inh Geb B | Apparatus and process for the making and coating of hollow bodies |
US3998174A (en) * | 1975-08-07 | 1976-12-21 | National Steel Corporation | Light-weight, high-strength, drawn and ironed, flat rolled steel container body method of manufacture |
EP0048890B1 (de) * | 1980-09-26 | 1984-12-12 | The Continental Group, Inc. | Leichtbehälter |
-
1982
- 1982-11-19 EP EP19820306178 patent/EP0109986B1/de not_active Expired
- 1982-11-19 DE DE8282306178T patent/DE3275641D1/de not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2016007151A1 (en) * | 2014-07-09 | 2016-01-14 | Umm Al-Qura University | Cooling receptacle for vaccine bottles |
Also Published As
Publication number | Publication date |
---|---|
DE3275641D1 (en) | 1987-04-16 |
EP0109986A1 (de) | 1984-06-13 |
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