CN1913986A - A method of forming a metal sheet blank - Google Patents

A method of forming a metal sheet blank Download PDF

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Publication number
CN1913986A
CN1913986A CNA2005800033305A CN200580003330A CN1913986A CN 1913986 A CN1913986 A CN 1913986A CN A2005800033305 A CNA2005800033305 A CN A2005800033305A CN 200580003330 A CN200580003330 A CN 200580003330A CN 1913986 A CN1913986 A CN 1913986A
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CN
China
Prior art keywords
instrument
preform
tool component
drift
edge
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Granted
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CNA2005800033305A
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Chinese (zh)
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CN100446885C (en
Inventor
扬·西姆里斯
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Glud and Marstrand AS
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Glud and Marstrand AS
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Publication of CN1913986A publication Critical patent/CN1913986A/en
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Publication of CN100446885C publication Critical patent/CN100446885C/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D24/00Special deep-drawing arrangements in, or in connection with, presses
    • B21D24/16Additional equipment in association with the tools, e.g. for shearing, for trimming
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D19/00Flanging or other edge treatment, e.g. of tubes
    • B21D19/12Edge-curling
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D51/00Making hollow objects
    • B21D51/16Making hollow objects characterised by the use of the objects
    • B21D51/38Making inlet or outlet arrangements of cans, tins, baths, bottles, or other vessels; Making can ends; Making closures

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Closures For Containers (AREA)

Abstract

A method of forming a metal sheet blank (7) by deep-drawing the sheet blank (7) so as to produce a deep-drawn pre-form (7) having a base portion (8) and a skirt portion (9) extending at substantially right angles thereform. The height of the skirt portion (9) varies around the perimeter of the pre-form (7) so as to provide a skirt (9) having a curved edge course (10), and subsequently processing said curved edge (10) to obtain a curled or bent edge (10) having a curved course. The invention also relates to a tool (1, 6) and an apparatus for forming a sheet blank and to a lid or container (7).

Description

Form the method for metal slabs
Technical field
The present invention relates to a kind of method that forms metal slabs, described metal slabs are preferably preparation lid or container.
The invention further relates to a kind of instrument and device that forms metal slabs, and the invention still further relates to lid or container.
Background technology
Be used for the lid of container and closure is used widely and produce in a large number, for example be used for the container of splendid attire food or chemical substance.Described lid is made by stamped metal slab in stamping tool usually.The preform that base forms after processing comprise substantially straight first surface and from first surface with extended skirt section, cardinal principle right angle.Described skirt section is usually because the heading phenomenon in the punching course has uneven edge.The edge in skirt section is sharp relatively, therefore must process to avoid injuring the user or the processor of lid.Usually need repair the outstanding ear at edge, skirt section, so that the skirt section has uniform length, and prepares for skirt section crimping step subsequently, to produce skirt section with crimped edge.Crimping provides edge smooth and safety for any user of lid.
United States Patent (USP) 5749258 discloses a kind of Method and kit for that is used for being formed by base the container body, and described base is preferably the hexagon base.Process equipment comprises the punch die that is used for base is formed the container body.Described punch die can use the base of non-geometry of the circle shape, by the reallocation of metal being produced the final products that do not have unnecessary ear.Described base is drawn into cup-shaped, and, the ear that produces in the drawing process is trimmed in order to obtain the even edge around opening of container.Then by punching press or roll and form described even edge.
United States Patent (USP) 4862722 discloses the method that a kind of base by material forms final container, and wherein the base of base by using polygonal shape rather than the annular phenomenon of will earing reduces to Min..
United States Patent (USP) 4005665 discloses a kind of method that is used to prepare steel billet, and described steel billet is not prone to the heading phenomenon in pressure is the process of pressed article.
United States Patent (USP) 6290447 discloses a kind of tool stand that is used for forming by punching press can end, by the once motion formation of drift and the can end of curling.
But the demand that reduces the packing price constantly increases, especially for non-returnable container, as packaging for foodstuff.
An object of the present invention is to provide the method for a kind of improved formation lid or container, described method can make the waste of material reach bottom line, is used to lid and/or the container packed cheaply thereby provide.
Another purpose of the present invention provides a kind of instrument of packing cheaply with lid and/or container that is used to produce.
A further object of the present invention provides the lid or the container of a kind of low cost and safety.
Summary of the invention
As mentioned above, be generally used for the crown cap of container and container by to metal slabs punching press, stretching or similarly be processed into.In punching press or drawing process, use annular base to be processed into the preform of the lid that is generally annular usually, described preform has the skirt section, and the skirt section is because the heading phenomenon has slight uneven height.Therefore, usually the skirt section is repaired,, make it have crimped edge so that the skirt section has uniform height, and processes the lower limb in skirt section subsequently.
The manufacturing that is used for the crown cap of container like this comprises a lot of procedure of processings and because a certain amount of waste material that finishing produces, these waste materials can not be utilized.Done a lot of effort for reducing the phenomenon of earing, for example, because in the drawing of base or the mobile heading phenomenon that forms of orientation of the metal in the process, but very difficult.
According to the present invention, by adopting a kind of diverse method, the step of omitting finished edge is achieved, and is about to ear as the container of final molding or the part of lid.
According to first aspect, the present invention relates to a kind of method that forms metal slabs, said method comprising the steps of: the deep draw plate slab, thereby produce and have base portion and the preform in extended skirt section from the base portion through deep draw, the height in described skirt section has the skirt section that crooked edge moves towards thereby provide, subsequently along the circumferential variation of preform, process described curved edge, obtain to have curl or the crooked edge of curved course.
This means that intentional formation has the skirt section at the inhomogeneous edge of heading, and should directly process at inhomogeneous edge, to obtain curl or the crooked edge in skirt section, also has curved course simultaneously (during from the lateral observation skirt section, promptly substantially perpendicular to the skirt section), the time of therefore having omitted the intermediate processing steps that inhomogeneous edge trimming is fallen, also reduced the amount of the waste material in the process thus.Like this, ear as the part of net shape, rather than is trimmed it.
Preferably extend with the cardinal principle right angle from base portion in the skirt section, but its can less than or extend greater than 90 ° angle.
Base can provide by any method easily, and for example according to an embodiment, by laser cutting, but this method comprises the initial step that base is washed into from the metal substrate annular or non-circular shape.Obtained thus a kind of simple, cost benefit is high and the method for base is provided easily.Though base has the shape of annular, because the orientation of metal flows in the drawing process of base, the deep draw preform still can make the skirt section have ear (crooked edge trend).
According to an embodiment, independent procedure of processing may be provided, as that separate, temporary transient or remote apart from interval operation, but procedure of processing is carried out in sequence of operations, promptly, in once carrying out sequentially blank, be the curved edge of the preform and the preform that curls with the base deep draw, those skilled in the art will recognize, this method provides the method effectively and easily of the preform that makes through deep draw from metal substrate.
In a preferred embodiment, said method comprising the steps of:
First tool component with crimping portion is provided, and described crimping portion forms three-dimensional path in instrument, thereby can form the crimped edge with crooked edge trend;
Second tool component staggered relatively with described first instrument is provided, and described second instrument has die cavity;
Provide drift in the opening in first tool component, described drift can move with respect to first instrument, stretching out the plane of first tool component, thereby move with respect to described drift, described drift is received in the die cavity of described second instrument by second tool component;
Described slab is placed between first and second tool components;
By moving first and second instruments with respect to described drift, the described slab of deep draw, vice versa, thus drift moves in the chamber of described second instrument, and thus the slab deep-draw is pressed into described preform; And subsequently
Process described curved edge by moving described preform to first tool component, perhaps vice versa, and the curved edge of preform and crimping portion are joined, thereby curved edge is curled.
Described method preferably includes following procedure of processing: before procedure of processing, described preform is pressed to drift, described compressing step can provide by machinery, hydraulic pressure or pneumatic compression devices, for example is arranged on another drift or piston (one or more) in the chamber of second tool component.
Described another drift or piston (one or more) are held in place in order to make preform, preferably the base portion of preform is pressed to the drift of described first instrument, simultaneously move first tool component, the curved edge of preform and crimping portion are joined towards preform.
Alternatively, when preform is moved towards first tool component, so that preform and crimping portion be when joining, first tool component can be held in place.
Punching press/cutting equipment can be arranged between first and second tool components, preferably, be positioned on first and/or second instrument, punch steps can comprise: first tool component is moved towards second tool component, to cut out described slab from metallic plate.
According to second aspect, the present invention relates to a kind of instrument, comprise first tool component with crimping portion, described crimping portion is formed with three-dimensional path in instrument, thereby can form crimped edge on the metal preform with curved edge trend.Provide a kind of thus and can directly process preform, to obtain to have the preform of curling curved edge trend with curved edge trend.
Preform is formed by metal slabs, and described metal slabs can provide by any method easily, for example by cutting or laser equipment, for example in instrument independently.
But according to embodiment, instrument also comprises the cut edge that is suitable for providing/cutting the slab with annular or non-circular shape.Obtained a kind of effective combination tool thus, the equipment that described instrument can be provided for cutting slab and the curved edge of preform is curled, and do not need more tools, and eliminated base is moved to time waste another instrument from an instrument.
According to embodiment, can be in the instrument that separates slab be processed into the production preform, but instrument also comprises the drift that can move in the opening in being arranged on first tool component, thus, the removable plane of stretching out first tool component of this drift.
According to embodiment, instrument also comprises second tool component with die cavity.Second tool component and described first tool component are oppositely arranged, and by move described second instrument with respect to described drift, die cavity is suitable for receiving described drift, thereby the metal slabs deep draw can be formed described metal preform, described metal slabs are arranged between first instrument and second instrument.
The cut edge can be arranged on first or second instrument, thereby by described first instrument and second instrument are moved towards each other, cuts out described slab.
The cut edge can be arranged on described first and/or the 3rd instrument of the adjacent setting of second instrument on, thereby by described first or second instrument is moved towards described the 3rd instrument, cut out described base.
Thus, base can cut, stretch and/or make edge curl in same instrument, thereby does not need base is moved on in another instrument, has obtained the effective exploitation to instrument.
According to another embodiment, instrument also comprises movably second drift or piston (one or more), preform is pressed to first tool component or preform is held in place, simultaneously first tool component is pressed to preform, so that the curved edge of metal preform and crimping portion join, thereby curved edge is curled.
According to the third aspect, the present invention relates to a kind of device that is used for the deep draw metal slabs, described device comprises that the described metal slabs of deep draw are used to receive the negative tool component of positive tool component when producing preform, described preform has base portion and from base portion extended skirt section, right angle substantially, the height in described skirt section changes along the excircle of preform, thereby the skirt section with curved edge trend is provided, and described device also comprises the curling instrument that is used for curling described curved edge.Obtained a kind of effective composite set thus, described composite set can be produced preform by the deep draw metallic plate, and curved edge is partly curled, thereby obtains to have the crimped edge of curved course.
According to embodiment, curling instrument can be a kind of roller of pressing to crimped edge, advances along the excircle in skirt section, still, curling instrument is included in the crimping portion that forms three-dimensional path in the tool component, thereby can form the edge that curls on the metal preform with curved edge trend.Provide simply a kind of thus and the instrument that curls cheaply, this instrument makes production minimize as the waste of material of the process of lid or container, because omitted the step that uneven edge trimming is fallen, and make waste of time still less, thereby processing is more cheap.
For a kind of effective composite set is provided, device can also comprise the equipment that is used for slab was cut into non-circular shape before deep draw.
According to fourth aspect, the present invention relates to a kind of device that is used for the deep draw metal slabs, and comprise instrument according to a second aspect of the invention.
According to the 5th aspect, the present invention relates to a kind of device that is used for the deep draw metal slabs, and be suitable for finishing the step of method according to a first aspect of the invention.
According to the 6th aspect, the present invention relates to a kind ofly have base portion and from the base portion substantially crown cap or the container in extended skirt section, right angle, the height in described skirt section changes along the excircle of lid or container, thereby the skirt section with curved edge trend is provided, and described curved edge further is curled.A kind of lid or container of uniqueness are provided thus.
The meaning along the excircle height change is highly may be identical in some excircle position on every side, but inequality along the whole excircle of preform.Like this, Wan Qu edge can have the trend by curve and/or rectilinear(-al).The height in skirt section can be any value easily.But according to embodiment, the scope of height is at 0-20 centimetre, stretching in a step.
According to embodiment, lid or container have annular, other than ring type, organic or polygonal shape, or the combination of one or more shapes.
According to the 7th aspect, the present invention relates to a kind ofly have base portion and extend and end at the crown cap or the container of crimped edge from base portion, the height in described skirt section changes along the excircle of lid or container.
Crown cap or container can be by method above-mentioned, instrument and device productions.
Description of drawings
To and be discussed in greater detail the present invention with reference to the accompanying drawings by example below, in the accompanying drawing:
Fig. 1 is the cutaway view according to first tool component of instrument of the present invention,
Fig. 2 is the cross-sectional schematic that has the instrument of workpiece,
Fig. 3 is the isometric view of first tool component of instrument,
Fig. 4 is the base that is used to produce lid,
Fig. 5 is the side view that is installed in the lid on the container, and
Fig. 6 is the isometric view of lid,
Fig. 7-9 reaches for according to the schematic views that is in the device in the different step of the present invention
Figure 10 a-f has shown each step that forms according to the method for optimizing of metal slabs of the present invention.
The specific embodiment
Figure 1 illustrates first tool component 1 (for example being presented at the cutaway view of the instrument among Fig. 3).First tool component 1 comprises the chamber 2 of a part of (not shown) that is suitable for holding workpiece, (beading formation the parts)/crimping portion 4 of the bottom of guide surface 3 in chamber 2 has the interior guide surface 3 that is used for workpiece and is provided with in the drawings.Crimping portion 4 forms by being substantially semiorbicular parts, goes out as shown, can process in the wall of the inner chamber 2 that enters first tool component 1.
First tool component 1 can also comprise opening 5, and described opening 5 is suitable for receiving the drift (not shown) of the face that stretches out first tool component 1 movably.
The function of instrument can find out in Fig. 2 that Fig. 2 is the partial sectional view of first tool component 1, and second tool component 6 is staggered relatively on the top of first tool component 1.Workpiece 7 (metal slabs) can further illustrate in the instrument of Fig. 2.Workpiece 7 both can upwards be pressed by drift 14, also can be by instrument 1,6 to pressing down, and form the skirt section 9 that has straight substantially end face 8 (base portion) and extend to end face 8 with down at right angles.The lower limb 10 in the skirt section 9 that goes out as shown can be outwardly-bent a little.Lid preform 7 has highly uneven skirt section 9, as shown in Figure 5.
In step subsequently, lid preform 7 can be promoted downwards by another drift or piston (shown in Figure 10 a-f) in second tool component 6 with drift 14, but be preferably instrument 1,6 move up, and drift 14, workpiece 7 and another drift or piston (shown in Figure 10 a-f) maintenance is static, preform is pressed in the chamber 2 of first tool component along interior spigot surface 3 like this, joins up to the lower limb 10 and the first tool component crimping portion 4.By being moved further of lid preform 7 or instrument 1,6, the lower limb 10 in skirt section 9 advances along the semi-circular features of crimping portion 4, and thus, lower limb 10 is curled or is crooked, and 9 lower limb 10 forms beading in the skirt section.
The first complete tool component 1 has been shown among Fig. 3.As shown in FIG., first tool component comprises the chamber with the looping pit 5 that runs through, and in the wall in described chamber, has the crimping portion 4 that forms three-dimensional path in instrument, thereby can form crimped edge on the preform 7 with curved edge trend.Crimping portion 4 is arranged on the circumference in whole chamber 2, and with different height settings.First tool component 1 also comprises cut edge 11, and extend around the periphery of the other than ring type of first tool component 1 described cut edge 11.By the layer of metal plate is pressed to cut edge 11, form the base that is used for cover as shown in Figure 4.
Base 12 shown in Fig. 4 is for having the non-circular shape of wavy edge.Obviously, base can depart from annular more or less, replaces shown organic shape, and base also can be the combination of polygon or one or more shapes.
Be the example (Figure 5 shows that the lid that is installed on the container) of the lid 13 finished shown in Fig. 5 and Fig. 6, described lid 13 has the skirt section 9 of inhomogeneous height.The lower limb 10 in skirt section 9 curls according to the present invention, and so that the edge of safety, passivation to be provided, this edge is not in that use can be relevant for the danger of scratching or hurting as pointing when cover.And from the plane in skirt section extended a little bigger a little crimping portion helps the user and handles lid, for example, maybe will cover when unloading from container when being installed to lid on the container.Usually crimping portion is arranged on 9 radially outer positions, skirt section, but alternatively, crimping portion also can be arranged on radially inner position or centre position.Crimping portion can have the cross section of the annular of being roughly as shown in the figure or have the plane alternatively or folding face cross section.
As shown in Figure 5, the uneven height in skirt section also can make lid and container combination, wherein, makes the hole closed or open thereby the hole in the container 22 can make ear 24 cover the hole by swivelling cover.The embodiment shown in Fig. 5 for example can be used as the ice cream jar or other inclines to instrument.
Fig. 7 to 9 shows the cutaway view that installs in the different procedure of processings.Shown in Fig. 7 first step, stamped sheet metal 7 preparation bases 7, base 7 preferably is not an annular.First tool component 1 comprises cut edge 11, by first and second tool components 1 and 6 are pushed to together metallic plate be pressed to the cut edge.Be deep draw step subsequently as shown in Figure 8, drift shown in the figure 14 is pushed upwardly and passes first tool component 1, and in the chamber 15 of second tool component 6, the base deep-draw is pressed into preform 16, described preform has base portion and from the extended skirt section of base portion, and has curved edge.
Last procedure of processing has been shown among Fig. 9, shown in the figure, the drift withdrawal, preform 16 is pushed to the crimping portion 17 of first tool component 1, to form crimped edge 18 on preform 16.Preform 16 is promoted downwards by the drift 19 in the chamber 15 that is arranged on second tool component 6.This drift mechanically starts (loading as spring) or starts by hydraulic pressure or air pressure.The crimped edge 17 of preform has curved course, but not shown.
Figure 10 a-f is depicted as the preferred steps according to formation metal slabs of the present invention.Metallic plate 7 is placed between first tool component 1 and second tool component 6, and first tool component 1 and drift 19 move down, and when drift 19 and metallic plate 17 joined, drift 19 stopped to move.When first tool component 1 during through the cut edge 20 of the 3rd instrument 21 being arranged to be adjacent, first tool component 1 is gone out base from metallic plate.Now first and second tool components 1,6 are moved down, keep drift 14,19 transfixions simultaneously, thereby preform 16 is carried out deep draw (Figure 10 b).
Then, first and second tool components 1,6 upwards return, and keep drift 14,19 transfixions simultaneously, thereby push preform 16 crimping portion 17 of first tool component 1 to, thereby form the curved edge 18 that curls on preform 16.
Because deep draw processing, the inside of final lid that forms or container 16 wedgings second tool component 6 by second tool component 6 that further moves up, keeps drift 19 transfixions (for example it can join with brake), simultaneously with finished product 16 release instruments.
Like this, lid or container are produced in sequence of operations, promptly in once carrying out sequentially blank, deep-draw pressed compact become the preform of lid or container and the edge of the preform that curls at last, and crimped edge has curved course, as shown in Fig. 5 and 6.

Claims (24)

1. method that forms metal slabs said method comprising the steps of:
The deep draw slab, producing the preform of deep draw, the skirt section that this preform has base portion and stretches out with right angle substantially from base portion, the height in described skirt section is along the circumferential variation of preform, so that the skirt section with curved edge trend to be provided; And subsequently
Process described curved edge, obtain to have curling or crooked edge of curved course.
2. method according to claim 1 also comprises initial step: from metal substrate base is washed into annular or non-circular shape.
3. according to the method for claim 1 or 2, wherein procedure of processing is finished in a series of behaviour do, promptly in once carrying out sequentially blank, be preform with the base deep draw and curl and/or the edge of crooked preform.
4. according to arbitrary described method among the claim 1-3, may further comprise the steps:
First tool component with crimping portion is provided, and described crimping portion forms three-dimensional path in instrument, can form the described crimped edge with curved edge trend;
Second tool component relative with described first instrument is provided, and described second instrument has die cavity;
Provide drift in the opening in first tool component, described drift can move with respect to first instrument, stretching out the plane of first tool component, thereby, described drift is received in the die cavity of described second instrument by moving second tool component with respect to described drift;
Described slab is placed between first and second tool components;
By moving first and second instruments, or move described drift, drift is moved in the described chamber of second instrument with respect to first and second instruments with respect to described drift, the described slab of deep draw, and thus the slab deep-draw is pressed into described preform; And subsequently
By described preform is shifted to first tool component, perhaps first tool component is shifted to described preform, the curved edge of preform is engaged with crimping portion, process described curved edge so that curling curved edge to be provided.
5. method according to claim 4 also comprises step: before procedure of processing, described preform is pressed to drift, described compressing step provides by machinery, hydraulic pressure or pneumatic shuttle.
6. according to arbitrary described method among the claim 2-5, wherein, punching press/cutter sweep is arranged between first and second tool components, is positioned on first and/or second instrument, punch steps comprises: first tool component is shifted to second tool component, to cut out described slab from metallic plate.
7. according to the described method of claim 1-6, wherein, metal slabs are for example polygon of annular or other than ring type.
8. an instrument comprises first tool component with crimping portion, and described crimping portion is formed with three-dimensional path in instrument, forming crimped edge on the metal preform with curved edge trend.
9. instrument according to claim 8 also comprises the cut edge that is suitable for providing from metallic plate the slab with annular or non-circular shape, and wherein base is suitable for forming described preform.
10. according to Claim 8 or 9 described instruments, also comprise drift, can in the opening in being located at first tool component, move the removable plane of stretching out first tool component of described thus drift.
11. instrument according to claim 10, also comprise second tool component that is oppositely arranged with described first instrument, and has die cavity, be suitable for receiving described drift, the metal slabs deep-draw that is arranged between first instrument and second instrument can be pressed into described metal preform by move described second instrument relative to described drift.
12. described instrument according to Claim 8-11, wherein, the cut edge is arranged on first or second instrument, with by described first instrument and second instrument are moved towards each other, cuts out described slab.
13. arbitrary described instrument according to Claim 8-12, wherein, the cut edge be arranged on described first and/or the 3rd instrument of the adjacent setting of second instrument on, with by described first or second instrument is moved towards described the 3rd instrument, cut out described base.
14. described instrument according to Claim 8-13, also comprise second drift or piston (one or more), preform is pressed to first tool component or preform is held in place, simultaneously first tool component is pressed to preform, so that the curved edge of metal preform and crimping portion join, thereby curved edge is curled.
15. the device of deep draw metal slabs, described device comprises negative tool component, when the described metal slabs of deep draw receive positive tool component when producing preform, described preform has base portion and from base portion extended skirt section, right angle substantially, the height in described skirt section changes along the excircle of preform, so that the skirt section with curved edge trend to be provided, described device also comprises the curling instrument that is used for curling described curved edge.
16. device according to claim 15, wherein, curling instrument is included in the crimping portion that forms three-dimensional path in the tool component, forming crimped edge on the metal preform with curved edge trend.
17., also comprise the equipment that slab was cut into annular or non-circular shape before deep draw according to claim 15 or 16 described devices.
18. the device of deep draw metal slabs, described device comprise according to Claim 8 arbitrary described instrument in-14.
19. the device of deep draw metal slabs, described device are suitable for finishing the step according to the described method of claim 1-7.
20. crown cap or container have base portion and from base portion extended skirt section, right angle substantially, the height in described skirt section changes along the excircle of lid or container, so that the skirt section with curved edge trend to be provided, described curved edge further is curled.
21. crown cap or container have base portion and extend and end at the skirt section of crimped edge from base portion, the height in described skirt section changes along the excircle of lid or container.
22. according to claim 20 or 21 described crown cap or containers, wherein, the scope of described height is 0-20 centimetre.
23. according to arbitrary described crown cap or container among the claim 20-22, wherein, described lid or container have annular, other than ring type, organic or polygonal shape, or the combination of one or more shapes.
24. according to arbitrary described crown cap or container among the claim 20-23, by producing according to arbitrary described method, instrument and device among the claim 1-19.
CNB2005800033305A 2004-01-28 2005-01-28 A method of forming a metal sheet blank Expired - Fee Related CN100446885C (en)

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DKPA200400119 2004-01-28

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CN100446885C CN100446885C (en) 2008-12-31

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EP (1) EP1720671A1 (en)
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WO (1) WO2005072887A1 (en)

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