CN105899433A

CN105899433A - Can body

Info

Publication number: CN105899433A
Application number: CN201480072415.8A
Authority: CN
Inventors: R.沃苏恩
Original assignee: Ball Europe GmbH
Current assignee: Ardagh Metal Beverage Europe GmbH
Priority date: 2013-12-16
Filing date: 2014-10-14
Publication date: 2016-08-24
Also published as: WO2015090669A1; CA2933754A1; US20160318645A1; EP3083420A1; MX2016007739A

Abstract

The invention relates to a can body (10) for a beverage can, which can body is formed from aluminum sheet metal as a single piece and has a circumferential wall (12) and a can bottom (14), which can bottom has a cup-like central section (16) curved inward and a standing section (18) that annularly surrounds the central section and is curved outward. The standing section curved outward is connected to the circumferential wall by means of an outer transition section extending aslant in the cross-section and defines a standing ring, along which the standing section at least approximately touches a flat surface when the can body is placed on such a flat surface. According to the invention, the can body has a diameter of less than 56 mm and the greatest sheet metal thickness of the formed aluminum sheet metal in the region of the cup-like central section curved inward is less than 0.25 mm.

Description

Tank body

The present invention relates to a kind of tank body being particularly useful for beverage can.

The known beverage can having this two-piece type, it is made up of tank body and lid, wherein, tank body and lid typical case Ground is connected with each other hermetically by double undercuts.Lid itself can be again multi-piece type and be generally of at least one Individual pulling-on piece or also have can re-closed capping.

Tank body self is single type and by initial flat plate forming.For make tank body by sheet material by The Method and kit for of drawing and forming is the most known.It is also known that be used for the typical of beverage can Tank body has the bottom inwardly arched upward, to give bottom comprcssive strength.(before fill) opening at tank body End regions in tank body be typically provided with " cervical region " attenuated, the most somewhat narrow.

The technical problem to be solved in the present invention is, it is provided that a kind of tank body, it is generally with the fewest material Material consumption and manufacturing cost realize sufficiently high intensity.

Above-mentioned technical problem is solved by the tank body according to the present invention.

Advising a kind of tank body for beverage can according to the present invention, described tank body single type ground is by aluminium plate Molding and there is leg and pot bottom, described pot bottom have central section that ball-and-socket shape inwardly arches upward with And annularly around described central section and the supporting section that outwards rides out, this supporting section is by transversal The transition section in the outside extended obliquely in the figure of face is connected with described leg, wherein, ring-type to bowed out The supporting section gone out limits a support ring, when tank body is placed on flat surface, described support Section at least approximately contacts described flat surface, the central authorities that described ball-and-socket shape inwardly arches upward along described support ring Section has the diameter more than 36mm, it is proposed, according to the invention, described tank body has the diameter less than 58mm With the maximum sheet metal thickness of the aluminium plate of molding in the region of the central section inwardly arched upward at ball-and-socket shape Less than 0.25mm.The central section that the ball-and-socket shape ground of bottom inwardly arches upward is encircleed with inside the most in the middle The central section risen has the sheet metal thickness of described maximum between the edge of supporting section.

From outer observation, the central section inwardly arched upward is complete spill and constitutes a ball-and-socket, ball-and-socket Extend to support section.The overall diameter of the central section inwardly arched upward is therefore less than the diameter of supporting section A bit, the least must be less than 10%, that is the central section the most inwardly arched upward is the most indirectly It is connected to support in section.The diameter of the central section inwardly arched upward is typically larger than 36mm and in principle Also greater than 40mm.

The concept of " inwardly " and " outwards " is inner space based on tank body rather than base in broad scope hereof For the longitudinal axis of tank body, the vault being therefore directed inwardly toward from external observation be spill arching and to The vault of outer sensing is from the arching that external observation is convex.

Preferably, the aluminium plate of molding tank body had before being shaped to tank body in the state of plane and is less than The sheet metal thickness of 0.25mm.This makes any in support ring of the sheet metal thickness of the complete tank body of molding Both greater than 0.25mm on position, because sheet material is stretched when tank body molding and becomes thinner with this.So And between tank skin and support ring, there will be thickening so that the tank body manufactured sheet metal thickness there is slightly The sheet metal thickness (such as 0.245mm) of micro-aluminium plate more than the plane before tank body molding.

It is furthermore preferred that the central section that described tank body inwardly arches upward is by least one central authorities' arching half Footpath R1_a and the peripheral arching radius R1_b smoothly connected with it limits, wherein, and central authorities' arching half Footpath R1_a between 39mm and 45mm and periphery arching radius R1_b between 25mm with Between 35mm.Although the central section sheet metal thickness making ball-and-socket shape inwardly arch upward by this way less but Still there is enough intensity.

It is furthermore preferred that described supporting section and the central section arched upward determine the bottom degree of depth jointly, should The bottom degree of depth be described in spacing maximum between the central section and the plane limited by support ring that arch upward, its Between 9.5mm and 11mm.The central section inwardly arched upward has ball-and-socket shape the most in the middle There is its maximum spacing from the plane limited by support ring, make the bottom degree of depth can on ball-and-socket shape ground inwardly The middle part of the central section arched upward determines.

It is furthermore preferred that tank body moulding the most again in the region of bottom. The further deformation of the final geometry making supporting section become tank body is carried out when reproducing type.Preferably Ground, the knuckle radius R2 inwardly arched upward before moulding more a size of between 1.5mm and 1.9mm, The central section arched upward with this knuckle radius R2 to supporting section transition.This size passes through institute when stretching The instrument used limits.The size approximation 1.7mm of especially preferred knuckle radius.

It is furthermore preferred that with support ring, (when i.e. tank stands vertically, the minimum point of supporting section is (at cross section Face is observed actually circle)) adjacent supporting section at least had mutually the same and half before moulding again Arching radius R3_a and R3_b of footpath transition the most each other.

The further preferred shape facility of the bottom of tank body is, described supporting section inwardly arches upward to have Radius R4 and the outside transition section of the radius R5 outwards arched upward that connects with it be transitioned into described in enclose Wall, wherein, the radius R4 inwardly arched upward is (excellent between 2.7mm and 3.1mm before moulding again Selecting size is about 2.9mm) and the radius R5 that outwards rides out before moulding again between 3.0mm with Between 3.5mm, that is such as between 3.2mm and 3.3mm.

Preferably, support ring has the diameter between 43mm and 46.5mm.

It is then preferred that tank body be, bottom it in known manner with molder tool again from supporting section to Moulding again in the region of the transition of the central section inwardly arched upward so that finally present the inside inwardly arched upward Transition section, the transition section of this inside has the diameter between 43mm and 45mm and 0.8mm And the arching radius between 1.2mm.The inside of the tool processes supporting section of dish type when reproducing type Leg, this instrument on internal leg rolling and manufacture by this way cincture, in tank body The depression of the longitudinal axis opening of centre, it has band radius in section and is about the fillet of 1mm, accordingly In the cross sectional radius on the circumference for the instrument of the dish type of moulding again.

Preferably, carry out moulding again instrument minimum with the radius of the tank body interlocking of moulding to be again Between 0.8mm and 1.2mm, with this 1mm the most mentioned above.

In the middle section of leg (such as in a half height of tank body) maximum of the aluminium plate of molding Preferably, this maximum gauge is less than 0.1mm and preferably less than 0.09mm to sheet metal thickness aspect.Whole Obtain the tank body of very thin-walled on body, its generally fill and capping after by intrinsic pressure just have expected from hold Hold intensity.

Preferably, the leg of tank body almost jacket casing shape and surround preferably smaller than 55mm and preferably at least The diameter of approximation 53mm.Further preferably, being designed and sized to tank body so that it is have at 150ml With the fill volume between 250ml and preferably there is corresponding height between 85mm and 140mm Degree.

The example of this tank body is expanded on further with reference to the accompanying drawings.In accompanying drawing:

Fig. 1 illustrates the tank body of fill volume and the bottom geometry according to the present invention with 250ml Side view；

Fig. 2 illustrate have 200ml fill volume and according to the present invention bottom geometry tank body Side view；

Fig. 3 illustrates the side-looking of tank body of fill volume and the bottom shape according to the present invention with 150ml Figure；

Fig. 4 illustrate in detail the bottom geometry according to the present invention before moulding again；With

Fig. 5 is shown in the bottom geometry according to the present invention after moulding again.

As it is shown in figure 1, tank body 10 has the leg 12 of basic jacket casing shape, with the central authorities inwardly arched upward The bottom 14 of section 16 and around central section 16 and the supporting section 18 that is connected with leg. Supporting section 18 is connected with leg 12 by the transition section 24 extended obliquely on cross section.This Outward, supporting section 18 has the leg 26 of the inside towards central longitudinal axis Z direction.

If tank body is vertically disposed on a flat surface, then supporting section just at it at cross section Figure being seen, minimum point (see Fig. 4 with Fig. 5) place contacts described surface.Minimum point is circular support ring Ingredient, supporting section along this support ring contact described flat surface.

In the region of the end 20 of the opening on the top of tank body 10, tank body 10 has a short neck The section 22 of contracting.

Figure is drawn the height H and diameter D of tank body and marks the longitudinal axis Z of central authorities.At Fig. 1 extremely A diameter of 53mm of the tank body shown in Fig. 3.

Fig. 1 illustrates the side view of the tank body with 250ml fill volume, and Fig. 2 correspondingly illustrates have The side view of the tank body of 200ml fill volume and Fig. 3 illustrate the side of the tank body with 150ml fill volume View.Highly H depends on fill volume and for having the tank body of 250ml fill volume in FIG For be about 135mm, for there is the tank body of 200ml fill volume in fig. 2 be about 111mm With about 90mm for there is the tank body of 150ml fill volume in figure 3.

Fig. 4 illustrate in detail the geometry of the pot bottom before moulding again.It will be seen that by institute Show that the support ring that geometry limits had the diameter bigger than 46mm before moulding again.Additionally Can see, the central section 16 that ball-and-socket shape inwardly arches upward has the arching radius R1_a of central authorities, and it is preferred Ground is between 39mm and 45mm, that is for example, 42mm.This arching radius transition to one edge Arching radius R1_b, the arching radius R1_b at edge is preferably between 25mm and 35mm, also The most for example, 30mm.It is connected with the central section 16 inwardly arched upward and has supporting section 18.At inwardly arch Knuckle radius between the central section 16 and the supporting section 18 that rise preferably existed before moulding again Between 1.5mm and 1.9mm, that is for example, 1.7mm.Additionally, supporting section 18 is being propped up by one Around carrier ring outwards ride out partially defined, wherein, abut against the arching outwardly in support ring Radius before moulding more respectively between 1.3mm and 1.5mm, and for example, 1.4mm.Around The arching of support ring is transitioned into an outside extended obliquely between supporting section 18 and leg 12 The arching observing spill from outside in the region of transition section, wherein, observes the arching of spill from outside Preferably there is the radius between 2.8mm and 3mm, for example, 2.9mm at this.Finally, tilt The transition section of the outside that ground extends to observe the convex radius between 3.0mm to 3.4mm from outside It is transitioned into leg 12.

The maximum thickness that the central section inwardly arched upward of bottom has is labeled as " thick the most in the diagram Degree " place.The sheet metal thickness about phase that the central section inwardly arched upward of bottom has on this position The sheet metal thickness of Ying Yu sheet material before being shaped to tank body, at this less than 0.25mm.If tank body is by having The aluminium plate manufacture of the initial plane having initial sheet metal thickness to be 0.24mm, draw in the diagram Thickness in the region of the central section inwardly arched upward of bottom approximates 0.24mm the most equally.On the contrary, Leg 12 has the thickness of about 0.09mm after shaping.

Finally, the final geometry of the bottom after Fig. 5 is shown in moulding again.It will be seen that pass through Moulding makes bottom thickness be reduced to from the ratio 10mm bigger (see Fig. 4 size marking DD_FE) started again Only a little bit smaller than 10mm, the most such as 9.7mm；See Fig. 5 size marking DD_BE.Here, apparatus The instrument of the dish type of that have minimum and that tank body is rabbeted radius about 1mm carries out moulding again.Reproducing During type, the central point of this radius is positioned at about between plane 2mm to the 3mm limited by support ring Away from place.When reproducing type, the instrument of dish type rolls on the interior leg of supporting section and makes by this way Cyclization around, to the depression of longitudinal axis opening of the central authorities of tank body, it has about 1mm in profile The circle of radius, corresponding to the cross sectional radius on the circumference for the instrument of the dish type of moulding again.By Again the depression of longitudinal axis opening of the central authorities to tank body of molder tool manufacture have 44mm with Diameter (at forming diameter) between 45mm.This size can be seen the most equally.

The material of tank body is 3104 alloy aluminum in an embodiment, its hardness with H19 and 0.245mm Nominal panel thickness.

Claims

1. the tank body (10) for beverage can, wherein, described tank body (10) single type ground is by aluminium plate Molding and have leg (12) and pot bottom (14), described pot bottom has the inside arching of ball-and-socket shape Central section (16) and annularly around described central section and the supporting section (18) that outwards rides out, should Supporting section is by the more outward transition section (24) extended the most obliquely and described leg (12) connecting, wherein, the supporting section (18) the most outwards rided out limits support ring, when tank body is put When putting on flat surfaces, described supporting section (18) at least approximately contacts described flat along described support ring Smooth surface, the central section (16) of the described inside arching of ball-and-socket shape has the diameter more than 36mm, its feature Being, described tank body has the diameter (D) less than 58mm and the central authorities in the described inside arching of ball-and-socket shape In the region of section, the maximum sheet metal thickness of the aluminium plate of molding is less than 0.25mm.

2. according to the tank body described in claim 1, it is characterised in that the central section of described inside arching By at least one central authorities arching radius R1_a and the peripheral arching radius R1_b that smoothly connects with it Definition, wherein, central authorities arching radius R1_a is between 39mm and 45mm and the arching radius of periphery R1_b is between 25mm and 35mm.

3. according to the tank body described in claim 1 or 2, it is characterised in that described supporting section and arching Central section jointly determine bottom the degree of depth, bottom this degree of depth be described arching central section with by supporting Spacing maximum between the plane that ring limits, it is between 9.5mm and 11mm.

4. according to the end of tank body described in the tank body that in claims 1 to 3, at least one is described, first molding Portion and then bottom is carried out reshaping to realize final geometry, it is characterised in that arching Central section be described supporting section, wherein, described transition with the knuckle radius R2 transition of inside arching Radius R2 is at least between 1.5mm and 1.9mm before reshaping.

5. according to the tank body that in Claims 1-4, at least one is described, it is characterised in that described supporting Ring has the diameter between 43mm and 46.5mm.

6. according to the end of tank body described in the tank body that in claim 1 to 5, at least one is described, first molding Portion and then bottom is carried out reshaping to realize final geometry, it is characterised in that with The supporting section that carrier ring adjoins at least had mutually the same before reshaping and radius is the most mutual Arching radius R3_a and R3_b of transition.

7. according to the end of tank body described in the tank body that in claim 1 to 6, at least one is described, first molding Portion and then bottom is carried out reshaping to realize final geometry, it is characterised in that described With the radius R4 of inside arching and the outside arching that connects with it in the supporting section section of side transition outside Radius R5 transition is described leg, and wherein, the radius R4 of inside arching was in 2.7mm before reshaping And between 3.1mm and the radius R5 of outwards arching be in before reshaping 3.0mm Yu 3.5mm it Between.

8. according to the end of tank body described in the tank body that in claim 1 to 7, at least one is described, first molding Portion and then bottom is carried out reshaping to realize final geometry, it is characterised in that described Bottom uses reshaping instrument from the supporting section central section to inside arching in a way known Transition region in reshaping so that finally present the transition section of the inside of inside arching, inside this Transition section there is the diameter between 43mm and 45mm and the arching between 0.8 and 1.2mm half Footpath.

9. according to the tank body that in claim 1 to 8, at least one is described, it is characterised in that at leg The maximum sheet metal thickness of the aluminium plate of the described molding in middle section is less than 0.1mm and the least In 0.09mm.

10. according to the tank body that in claim 1 to 9, at least one is described, it is characterised in that aluminium plate exists The state of plane had before being shaped to tank body the sheet metal thickness less than 0.25mm.

11. according to the tank body that in claim 1 to 10, at least one is described, it is characterised in that described in enclose Wall is at least to approximate cylinder hull shape and surround the diameter at least approximating 53mm.

12. according to the tank body that in claim 1 to 11, at least one is described, it is characterised in that described tank Body has the fill volume between 150ml and 250ml.

13. according to the tank body that in claim 1 to 12, at least one is described, it is characterised in that described tank Body has the height between 85mm and 145mm.