EP0675773A1 - Verfahren und Vorrichtung zur Weiterbehandlung eines Verschlussdeckels aus Blech. - Google Patents
Verfahren und Vorrichtung zur Weiterbehandlung eines Verschlussdeckels aus Blech.Info
- Publication number
- EP0675773A1 EP0675773A1 EP93921809A EP93921809A EP0675773A1 EP 0675773 A1 EP0675773 A1 EP 0675773A1 EP 93921809 A EP93921809 A EP 93921809A EP 93921809 A EP93921809 A EP 93921809A EP 0675773 A1 EP0675773 A1 EP 0675773A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- lid
- curvature
- cover
- radius
- mirror
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 22
- 230000008569 process Effects 0.000 title claims abstract description 11
- 239000000463 material Substances 0.000 claims abstract description 25
- 235000013361 beverage Nutrition 0.000 claims abstract description 4
- 239000002184 metal Substances 0.000 claims description 8
- 230000009467 reduction Effects 0.000 claims description 7
- 230000000694 effects Effects 0.000 claims description 5
- 230000007423 decrease Effects 0.000 claims description 4
- 238000003825 pressing Methods 0.000 claims description 3
- 238000003754 machining Methods 0.000 claims 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 abstract 1
- 238000007789 sealing Methods 0.000 abstract 1
- 238000004049 embossing Methods 0.000 description 21
- 239000011324 bead Substances 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000004323 axial length Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000002407 reforming Methods 0.000 description 1
- 238000005482 strain hardening Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D51/00—Making hollow objects
- B21D51/16—Making hollow objects characterised by the use of the objects
- B21D51/38—Making inlet or outlet arrangements of cans, tins, baths, bottles, or other vessels; Making can ends; Making closures
- B21D51/44—Making closures, e.g. caps
Definitions
- the invention relates to a method for further treatment of a closure lid made of sheet metal, in particular a folded lid for beverage cans or the like, with the features of
- the tool for executing the method is also affected.
- Such a cover is known from US Pat. No. 3,441,170, in which the radius of curvature is reduced in thickness even from the inside of the cover, with the formation of a “coined bead”.
- a kind of joint is created between the inner leg of the groove and the cover mirror in order to restrict the bulging of the cover to the cover mirror, so that the tensile forces acting radially inward on the core wall of the cover are reduced.
- the lid mirror which bulges more strongly under greater internal pressure, is articulated to the core wall in such a way that the latter is not or only slightly touched in its vertical orientation by the bulging.
- Radius of curvature area Material of the lid flows radially inwards and outwards.
- the deformation area forms a flat on the outside of the radius of curvature, the major part of the flat coming to lie in a plane perpendicular to the axis of the cover or in a conical plane inclined outwards and downwards. This also improves the resistance of the cover to bulging.
- Compressive strength Material can be displaced from the lid edge area in a controlled manner.
- the ring-shaped strip area which is formed during the further treatment with a reduction in thickness, lies clearly radially within the actual radius of curvature. This means that almost no material is displaced into the cover mirror, but from its edge area over the radius of curvature (almost only) into the radially inner leg of the U-shaped core groove. This displacement process is achieved primarily by the angle which is formed and determined by the embossing surfaces acting on the strip-shaped area. This angle is determined between the embossing surfaces of the embossing tool or stamp that acts on the lid from the outside and a plane running perpendicular to the axis of the lid.
- the embossing surface of the lower embossing tool or stamp is preferably parallel to this plane running perpendicular to the lid axis, that is to say that the angle mentioned is also present between the two embossing surfaces.
- This angle should be significantly larger than 0 ° be, but in any case less than 90 °.
- This angle is preferably between 2 ° and 15 °.
- Lids reshaped in such a way are also increased
- a U-shaped groove with a finger-shaped ring holder can be centered in the U-shaped groove during the embossing process, without exerting forces on the core groove.
- the area of the annular strip is pressed together in such a way that in this annular strip area the reduction in sheet thickness decreases steadily from a point of smallest residual thickness in the direction radially outward.
- the remaining thickness changes radially outward, for example in the form of a straight wedge, the underside lying in a plane perpendicular to the lid axis and the top in a straight conical surface.
- a second treatment step follows the first treatment step described.
- the lid material is - in the first Crushed and deformed step - strip-shaped area slightly leveled, but without making noticeable material displacements, but only in a partial area, namely a radially outer area of the strip adjacent to the radius of curvature.
- the second treatment step levels out the slight "doming" of the cover mirror that may have arisen and essentially creates the precise contact of the radially inner wall of the core groove with the lower mold.
- the radially inner “lock”, which has already been cold-hardened due to the wedge effect, and the planar action of the tool prevent, during leveling, that material is again displaced from a local area or even shifted inward (past the cold-hardened "lock”).
- the leveling step therefore does purely geometric design work, which relates to the improved alignment of the inner leg of the core groove.
- Figure 1 in a detail and in a vertical section containing the axis 16 of the lid, the tools required to carry out the method at the end of the further treatment of a corresponding sheet metal lid;
- FIG. 2 shows the sheet metal cover treated according to the invention in a similar representation as FIG. 1;
- Figure 3 shows a modified embodiment of the tool for a modified method example.
- FIG. 4 shows the tools for a further processing step following the further processing step of FIG. 1 or FIG. 3;
- FIG. 5 in a similar representation as Figure 2, a cover that has been treated with both process steps according to Figure 1 and Figure 4.
- the cover 1 is shaped as usual from a sheet metal blank so that it has a slightly curved central cover mirror 10, which over a radius of curvature 11, Rl in the straight inner leg 13 of a cross-sectionally U-shaped groove 12, the outer leg 14, the Forms the core wall of the lid, to which (not shown) the lid edge connects.
- the edge can be of any design and typically be a folded edge.
- the lid preformed in this way is placed between the embossing tools 2 and 4.
- the embossing tool 2 has an embossing surface 3 running approximately perpendicular to the lid axis 16.
- the embossing tool 4, which can be moved relative to the embossing tool 2 in accordance with the arrow 15, has on its underside in the outer area an annular rib formed by a step 5, the effective bottom 6 of which forms a predetermined angle 25 with respect to the embossing surface 3 of the tool 2, which angle is noticeably greater than 0 ° and less than 90 ° and preferably approximately between 2 ° and 15 ° lies.
- the embossing tool 4, 5 is supported on a stamp 7, on which, in the example shown, a ring-shaped hold-down device 8 is supported via a spring 9, which is finger-shaped in cross-section and engages centering in the U-shaped groove 12 of the cover.
- Figure 1 shows the embossing tools in a position which they assume at the end of the squeezing or embossing process.
- the material of the cover mirror 10 of the sheet metal cover is squeezed in an annular strip region 20 which adjoins the Rl curvature 11 radially on the inside.
- the curvature 11 itself is largely spared from the squeezing process, but not from its effects with regard to the material moved outwards.
- the material displaced during the squeezing flows in a controlled manner radially outward and via the curvature 11 into the inner leg 13 of the groove 12 to be aligned.
- the reduction in thickness decreases in the radial direction towards the outside, preferably along 22 evenly and steadily, so that radially outside the remaining thickness 29 merges into the normal thickness of the sheet in the region of the curvature 11 essentially without steps.
- the flow process is further favored if the holding-down device 8 is rigidly supported on the punch 7 via the part 8a, the axial length 27 of the centering finger 8 being dimensioned such that at the end of the embossing process, a predetermined pressure is exerted on the bottom 12 of the finger Nut is exercised.
- the flow of material from the strip area 20 is still significantly favored by the curvature 11, and at the same time the radially inner straight leg 13 of the U-shaped groove 12 is held and aligned under tensile stress.
- the resistance to deformation of the edge profile can be significantly increased and the nose strength increased if the treatment step (stamping) according to FIG. 1 or 3 described above is followed by a treatment step (leveling) according to FIG. 4.
- the upper die 31 has an embossing rib, the effective leveling surface of which runs essentially perpendicular to the lid axis 16, so that the material runs between two planes and perpendicular to the lid axis 16 during pianing
- the embossing tool 31 is supported on the punch 30, on which the centering tool 34, which is finger-shaped in cross section, can also be supported directly via part 33, as shown in FIG. 4.
- the stretching effect of the tool 34 is the same as the effect of the tool 8 according to FIG. 3.
- the radius R2 of the curvature 11 is reduced compared to the radius Rl according to FIG. 2.
- the reduction in the radius of curvature and the geometrical reforming of the squeezing area lead to an increase in the nose strength through clean contouring of the edge profile without additional material hardening.
- the original residual thickness of the sheet in the radially outer region of the strip, as indicated at 29 in FIG. 3, is only slightly reduced at 40, but is geometrically shaped.
- the outer surface, which originally runs conically over the entire width 24 of the strip 20, is deformed by the deformation in a surface region 35 which is narrower than the width of the strip 24 and is perpendicular to the cover axis 16.
- the remaining part of the strip 24 maintains its inclination according to the angle 25 from the first page.
- the centering during the second step according to FIG. 5 can take place according to FIG. 1, that is to say with a spring-loaded centering tool.
- a centering tool according to FIG. 4 is preferred, with which the leg 13 of the U-shaped groove 12 can be placed under yield stress.
Landscapes
- Mechanical Engineering (AREA)
- Engineering & Computer Science (AREA)
- Rigid Containers With Two Or More Constituent Elements (AREA)
- Automatic Analysis And Handling Materials Therefor (AREA)
- Control And Other Processes For Unpacking Of Materials (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
- Closures For Containers (AREA)
- Forging (AREA)
- Meat, Egg Or Seafood Products (AREA)
- Sealing Battery Cases Or Jackets (AREA)
- Battery Electrode And Active Subsutance (AREA)
- Encapsulation Of And Coatings For Semiconductor Or Solid State Devices (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
- Photographic Processing Devices Using Wet Methods (AREA)
- Threshing Machine Elements (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Shaping Of Tube Ends By Bending Or Straightening (AREA)
- Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
- Electroplating Methods And Accessories (AREA)
- Food Preservation Except Freezing, Refrigeration, And Drying (AREA)
- General Preparation And Processing Of Foods (AREA)
Abstract
Description
Claims
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/DE1993/000958 WO1995010373A1 (de) | 1993-10-08 | 1993-10-08 | Verfahren zur weiterbehandlung eines blechverschlussdeckels |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0675773A1 true EP0675773A1 (de) | 1995-10-11 |
| EP0675773B1 EP0675773B1 (de) | 1995-10-18 |
Family
ID=6888535
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP93921809A Expired - Lifetime EP0675773B1 (de) | 1993-10-08 | 1993-10-08 | Verfahren und Vorrichtung zur Weiterbehandlung eines Verschlussdeckels aus Blech |
Country Status (16)
| Country | Link |
|---|---|
| US (1) | US5832770A (de) |
| EP (1) | EP0675773B1 (de) |
| JP (1) | JPH09503443A (de) |
| KR (1) | KR100274401B1 (de) |
| AT (1) | ATE129173T1 (de) |
| AU (1) | AU686571B2 (de) |
| BG (1) | BG62278B1 (de) |
| DE (1) | DE59300795D1 (de) |
| DK (1) | DK0675773T3 (de) |
| ES (1) | ES2082660T3 (de) |
| FI (1) | FI961527A7 (de) |
| GR (1) | GR3018362T3 (de) |
| NO (1) | NO312018B1 (de) |
| RU (1) | RU2111820C1 (de) |
| WO (1) | WO1995010373A1 (de) |
| ZA (1) | ZA947798B (de) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE59300795D1 (de) * | 1993-10-08 | 1995-12-21 | Schmalbach Lubeca | Verfahren und Vorrichtung zur Weiterbehandlung eines Verschlussdeckels aus Blech. |
| US5987956A (en) * | 1995-05-17 | 1999-11-23 | Schmalbach-Lubeca Ag | Process for further treating a closure end made of sheet |
| US5931663A (en) * | 1997-02-27 | 1999-08-03 | Process Combustion Corporation | Purge system for regenerative thermal oxidizer |
| AU4129999A (en) * | 1998-03-23 | 1999-10-18 | Schmalbach-Lubeca Ag | Slightly inclined surface area in a sheet-metal closing lid |
| DE19833492A1 (de) * | 1998-03-23 | 1999-09-30 | Schmalbach Lubeca | Verschlußdeckel aus Blech mit abgesenktem Öffnungsbereich |
| US8141406B2 (en) * | 2008-10-09 | 2012-03-27 | Container Development, Ltd. | Method and apparatus for forming a can shell |
| DE102009035680A1 (de) * | 2009-07-30 | 2011-03-17 | Alcan Technology & Management Ag | Vorrichtung zum Formen von tiefgezogenen Behältern |
| CN108115048B (zh) * | 2017-12-18 | 2019-05-14 | 中国航发贵州黎阳航空动力有限公司 | 一种环形钣金零件径向槽口轴向精确翻边方法 |
Family Cites Families (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2154983A (en) * | 1937-02-15 | 1939-04-18 | Kelsey Hayes Wheel Co | Metalworking machine |
| US3441170A (en) * | 1967-03-03 | 1969-04-29 | Continental Can Co | Coined bead for improved fill characteristics |
| US3591037A (en) * | 1969-02-24 | 1971-07-06 | Aluminum Co Of America | Container with removable panel portion |
| US3576272A (en) * | 1969-06-30 | 1971-04-27 | Procter & Gamble | Score-line structure |
| US3871314A (en) * | 1972-10-20 | 1975-03-18 | Dorn Co V | Method of making folded can ends and folded can end product |
| US3946683A (en) * | 1972-12-26 | 1976-03-30 | Aluminum Company Of America | Tabless container opening device and method and tools for forming the same |
| US4122791A (en) * | 1977-06-30 | 1978-10-31 | Dayton Reliable Tool & Manufacturing Company | Method and apparatus for scoring an enameled metal surface |
| US4354784A (en) * | 1979-08-27 | 1982-10-19 | Boise Cascade Corporation | Method and apparatus for forming a non-silver scored metal end |
| US4579495A (en) * | 1982-01-08 | 1986-04-01 | American Can Company | Environmental retained tab ends |
| US4577774A (en) * | 1982-03-11 | 1986-03-25 | Ball Corporation | Buckle resistance for metal container closures |
| USRE33217E (en) * | 1982-03-11 | 1990-05-15 | Ball Corporation | Buckle resistance for metal container closures |
| US4434641A (en) * | 1982-03-11 | 1984-03-06 | Ball Corporation | Buckle resistance for metal container closures |
| US4735863A (en) * | 1984-01-16 | 1988-04-05 | Dayton Reliable Tool & Mfg. Co. | Shell for can |
| US4832223A (en) * | 1987-07-20 | 1989-05-23 | Ball Corporation | Container closure with increased strength |
| US5219257A (en) * | 1990-11-21 | 1993-06-15 | Koch Systems Incorporated | Self-opening can lid with improved contour of score and means for making |
| US5356256A (en) * | 1992-10-02 | 1994-10-18 | Turner Timothy L | Reformed container end |
| DE59300795D1 (de) * | 1993-10-08 | 1995-12-21 | Schmalbach Lubeca | Verfahren und Vorrichtung zur Weiterbehandlung eines Verschlussdeckels aus Blech. |
-
1993
- 1993-10-08 DE DE59300795T patent/DE59300795D1/de not_active Expired - Fee Related
- 1993-10-08 WO PCT/DE1993/000958 patent/WO1995010373A1/de not_active Ceased
- 1993-10-08 ES ES93921809T patent/ES2082660T3/es not_active Expired - Lifetime
- 1993-10-08 US US08/411,739 patent/US5832770A/en not_active Expired - Fee Related
- 1993-10-08 KR KR1019960701818A patent/KR100274401B1/ko not_active Expired - Fee Related
- 1993-10-08 AT AT93921809T patent/ATE129173T1/de not_active IP Right Cessation
- 1993-10-08 AU AU51066/93A patent/AU686571B2/en not_active Ceased
- 1993-10-08 RU RU96108835A patent/RU2111820C1/ru active
- 1993-10-08 JP JP7511147A patent/JPH09503443A/ja active Pending
- 1993-10-08 DK DK93921809.5T patent/DK0675773T3/da active
- 1993-10-08 EP EP93921809A patent/EP0675773B1/de not_active Expired - Lifetime
-
1994
- 1994-10-05 ZA ZA947798A patent/ZA947798B/xx unknown
-
1995
- 1995-12-12 GR GR950403490T patent/GR3018362T3/el unknown
-
1996
- 1996-04-02 NO NO19961358A patent/NO312018B1/no not_active IP Right Cessation
- 1996-04-04 FI FI961527A patent/FI961527A7/fi unknown
- 1996-04-05 BG BG100481A patent/BG62278B1/bg unknown
Non-Patent Citations (1)
| Title |
|---|
| See references of WO9510373A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| WO1995010373A1 (de) | 1995-04-20 |
| BG62278B1 (bg) | 1999-07-30 |
| BG100481A (en) | 1997-07-31 |
| AU686571B2 (en) | 1998-02-12 |
| FI961527A0 (fi) | 1996-04-04 |
| NO961358D0 (no) | 1996-04-02 |
| KR100274401B1 (ko) | 2000-12-15 |
| NO961358L (no) | 1996-04-19 |
| AU5106693A (en) | 1995-05-04 |
| DK0675773T3 (da) | 1996-02-19 |
| JPH09503443A (ja) | 1997-04-08 |
| ATE129173T1 (de) | 1995-11-15 |
| ES2082660T3 (es) | 1996-03-16 |
| NO312018B1 (no) | 2002-03-04 |
| RU2111820C1 (ru) | 1998-05-27 |
| ZA947798B (en) | 1995-08-21 |
| US5832770A (en) | 1998-11-10 |
| EP0675773B1 (de) | 1995-10-18 |
| GR3018362T3 (en) | 1996-03-31 |
| DE59300795D1 (de) | 1995-12-21 |
| FI961527A7 (fi) | 1996-04-04 |
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