EP1663541A1 - Method for producing a cup-shaped object - Google Patents
Method for producing a cup-shaped objectInfo
- Publication number
- EP1663541A1 EP1663541A1 EP04762740A EP04762740A EP1663541A1 EP 1663541 A1 EP1663541 A1 EP 1663541A1 EP 04762740 A EP04762740 A EP 04762740A EP 04762740 A EP04762740 A EP 04762740A EP 1663541 A1 EP1663541 A1 EP 1663541A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- blank
- tool
- wall
- deformation
- profiling
- 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
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 13
- 238000000034 method Methods 0.000 claims abstract description 32
- 238000005520 cutting process Methods 0.000 claims abstract description 19
- 239000002184 metal Substances 0.000 claims abstract description 10
- 239000011521 glass Substances 0.000 claims abstract description 6
- 238000005096 rolling process Methods 0.000 claims description 6
- 238000004080 punching Methods 0.000 claims description 3
- 230000000750 progressive effect Effects 0.000 abstract description 4
- 238000000465 moulding Methods 0.000 description 6
- 239000004922 lacquer Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000003973 paint Substances 0.000 description 3
- 238000013459 approach Methods 0.000 description 2
- 238000004049 embossing Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000003856 thermoforming Methods 0.000 description 2
- 230000037303 wrinkles Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000005352 clarification Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000004044 response Effects 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
-
- 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
- B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
- B21D22/20—Deep-drawing
- B21D22/22—Deep-drawing with devices for holding the edge of the blanks
-
- 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
- B21D51/50—Making screw caps
Definitions
- the invention relates to a method for the stepwise production of a cup-shaped object, in particular a blank of a screw cap for glass bottles or the like, from a laquetted sheet metal, by deep drawing in a first step due to the relative movement between a cooperating with a hold-down cutting bell and a drawing block of the Blank is punched out of the sheet and pulled around the drawing block, wherein the width of a forming between the cut bell and the blank holder Bördeis the blank is progressively reduced with progressive deformation.
- Deep drawing is understood to mean the forming of a sheet metal blank (blank, blank) into a hollow body or a hollow body to form a hollow body with a smaller circumference, with or without intended alteration of the sheet thickness.
- blade blank
- segments of the blank must be folded up to the cylinder wall and displaced intermediate sections. In this case, radial tensile and tangential compressive stresses occur. When overflowing the cut bell creates a bend. Thus, the radially outwardly projecting brim or flange under the action of the tangential compressive stresses not kinks and folds, the kraftbeaufschlagte hold-down is provided.
- the provided for glass bottles lid are drawn from relatively thin sheets. These sheets are, especially if they are intended for the food industry, varnished and often have advertising imprints on.
- the problem with the lid production is that when forming in the axially outer region of the cup, the coating breaks and form fine color threads.
- the cracked paint does not affect the appearance of the lid, as the axial end of the blank is subsequently rolled, so that the torn areas, which are otherwise very fine, are invisible on the finished product.
- the lacquer threads settle not only in the tools, but also on the edge of the blank, in the tools forms a cotton-like consistency, which must be removed regularly.
- the threads that attach themselves to the bowl, especially at its edge, must be carefully removed so that they do not come into contact with the bottling (food) at the bottler, which would be unacceptable.
- Lids for glass bottles are mass-produced articles, of which large quantities are produced in a mold with high cycle times.
- the cycle times usually include values of about 300 min 1 .
- the production plant which includes the tool, shut down and blown off or cleaned, which extends the production time and thus increase the manufacturing costs.
- the blowing off of the threads must be very done so that the staff operating the plant is not endangered.
- the hall in which the systems are installed must also be constantly cleaned of the colored threads.
- DD 233 036 A3 discloses a method for deep drawing sheet metal parts, in which a first train a second train within the same press stroke followed in the same direction, the pulling force of the first train used as a hold-down force of the second train and reduced with progressive draw depth becomes.
- the hold-down force is progressively reduced from the beginning of the second turn and completely canceled before the end of the second turn.
- a method according to the invention is characterized in that the production takes place stepwise in two tools:
- the invention is based on the finding that the thread formation is not formed when punching out the blank from the sheet due to the high cutting forces, as might be expected, but the end of deep drawing when the surface pressure on the brig formed between the cut bell and the hold-down is reached very high levels. Due to the defined width of the Bördeis shortly before the surface pressure in this brim reaches values that cause the lacquer layer to crack, the deep drawing or the deformation is interrupted. By tearing the lacquer layer due to the high surface pressure, the lacquer layer would draw threads.
- the brim then has a width of, for example, a maximum of 3 mm, which is very small compared to the cup height.
- Deforming or redirecting the Bördeis takes place in a second step in a second tool then without applying force to a hold-down, so that when deflecting no surface pressure acts on the bord.
- the necessary forming force can be kept very low due to the only small necessary deformation, whereby the tearing of the paint layer is prevented and can form any threads.
- the introduction of a profiling in the wall of the blank provided in the second step prepares it for further processing, for example curling the wall inwards. This procedure eliminates the downtime and associated costs previously required for cleaning, thereby significantly reducing production costs.
- An advantageous embodiment of the inventive concept provides that the deformation is carried out by extending the Bördeis due to the relative movement between a cutting bell and a drawing block of the second tool.
- An alternative embodiment of the method according to the invention provides that the deformation takes place by means of a guide cooperating with the second tool.
- a further alternative embodiment of the method according to the invention provides that the deformation takes place by rolling in a second tool. Rolling enables a simple and efficient forming process to prepare the blank for further processing.
- the wall is pulled radially outward by the profiling.
- the profile is deformed by the wall facing radially inward.
- the radial width of the Bördeis the end of the first forming step is less than three millimeters, preferably 0.1 to 1, 5 mm, and more preferably 0.5 to 1, 0 mm.
- the width of the Bördeis is of course dependent on the surface pressure occurring, which in turn depends on the material and the material thickness or sheet thickness and their compatible maximum value is in correlation with the thickness of the ink layer.
- the best width of the Bördeis is determined in each case for different boundary conditions, such as material, material thickness and the color or paint layer, iteratively.
- Figure 1 - a partial half section through a first thermoforming tool
- FIG. 2 shows a deep drawing tool in the partial half section according to the prior art.
- FIG. 3 shows a first deep drawing tool in partial half section for carrying out the method according to the invention at the end of the first partial step
- FIG. 4 shows a second deep-drawing tool in the partial half section at the end of the second partial step
- FIG. 5 shows a further second thermoforming unit for carrying out the method according to the invention at the end of the second partial step in the partial half section.
- Figure 6 the schematic representation for further processing of the blank according to the invention.
- Figure 7a an alternative mold for carrying out the method according to the invention at the beginning of the second partial step in the partial half section;
- Figure 7b the mold of Figure 7a at the end of the second step.
- FIG. 8 shows a plan view of the molding tool from FIG. 7 for carrying out the method according to the invention for the second partial step in the partial half section;
- FIG. 9 shows a plan view of an alternative molding tool for carrying out the method according to the invention for the second partial step in the partial half section.
- FIG. 1 shows the partial section of the first deep-drawing tool constructed symmetrically about the center line M, consisting of the cutting ring 1, the cutting bell 2, the holding-down device 3 cooperating with the cutting bell 2, the lower part 4 supporting the drawing block 6 and the stamping block 7.
- the embossing block 7 and the drawing block 6 with the cutting bell 2 include the blank 8 a.
- the force of a spring assembly not shown here is transmitted to the hold-3.
- the blank 8 is produced according to the state of the art with the tool according to FIG. 2, the lacquered metal sheet or a cut-out (punched out) thereof by means of the cut ring 1.
- Ronde is placed on the drawing block 6.
- the cutting bell 2 punched out a metal plate from the blank.
- a flange or brim is clamped between the holding-down device 3 and the cutting bell 2, the width of which is steadily reduced in a further lowering movement of the cutting bell 2 and the downholder 3. Due to the reduction of the width of the Bördeis as a result of acting on the hold-down force 3 F increases the surface pressure in the berth.
- FIG. 3 shows the first tool at the end of the first partial step of the method according to the invention.
- the cutting bell 2 and the hold-down 3 are moved together so far relative to the drawing block 6 until a defined surface pressure occurs in the brim 8a of the blank 8, d. h.,
- the width of the Bördeis 8a formed from the difference of the outer radius R and the inner radius r has reached a defined level.
- This defined dimension is less than 3 mm and is preferably 0.1-1.5 mm and more preferably 0.5-1.0 mm. Compared to the inner radius r of the blank 8, this measure is therefore very small.
- the two steps of the deep-drawing process according to the invention are carried out in two different tools. Therefore, a conventional first tool can be used, in which the hold-3 is force-loaded, for example via a spring assembly. After completion of the first step, the blank 8 is removed from the first tool and inserted into another, second tool, which either has no hold-down 3, as shown in FIG. 5 or an existing hold-down 3 is weak, as shown in FIG.
- the hold-down device 3 is powerless during the deformation and the cutting bell 2 forms the blank 8 by a further deep-drawing step.
- a radially outwardly facing profiling 8c is introduced, which ensures the subsequent curling of the wall 8b that in the wall 8b no wrinkles or Einknickept.
- the inside of the cutting bell 2 and the outside of the drawing block 6 have a profiling 8c corresponding shape.
- the hold-down device 3 shown in Figure 4 is used only as a lifter in the illustrated tool, therefore, after the completion of the deformation to eject the molding by a lifting movement upward from the tool.
- An alternative second tool which is illustrated by means of FIG. 5, differs from the tool shown in FIG. 4 in that a hold-down device is completely dispensed with.
- an impact element 9 integrated in the drawing block 6 is instead provided as a lifter, which ejects the shaped part from the tool after completion of the deformation by means of a lifting movement upwards.
- the curling of the wall 8b is Figure 6 removed. By rolling radially inward, the radially outwardly directed profiling 8c is canceled, so that the wall 8b assumes a straight course.
- cams 8 d are pressed in over the circumference, which later interact with the thread attached to the neck of the glass bottle.
- the blank 8 formed in the first sub-step has, in the lower region of the wall 8b, a bristle 8a pointing radially outwards and is placed on a shaped block 10.
- the mold block 10 On its outer circumference, the mold block 10 has a shoulder 11 in such a way that the diameter in the lower region 10a of the mold block 10 is smaller than the diameter in the upper region 10b.
- the paragraph 1 1 is located substantially in the area or the height of the Bördeis 8a of the blank 8, when this is placed on the mold block 10.
- an applicator 12 is brought to the brothel 8a of the blank 8 coming from the outside.
- the arrow 13 indicates the direction of movement of this approach.
- the applicator 12 rotates about its longitudinal axis 14, which is inclined inwards at the level of the Bördeis 8a. That is, the lower portion of the Anrollers has a smaller distance to the mold block 10 than the upper area.
- the rotation about the longitudinal axis 14 is indicated by the bent arrow 15.
- the applicator 12 is further guided inwardly until the blank 8 is deflected in the lower region with the bordel 8a, so that in the wall 8b, a radially inwardly facing profiling 8e is formed, as shown in Figure 7b.
- the profiling 8e is formed radially inward on the entire outer circumference of the wall 8b of the blank 8.
- the wall 8b with the profiling 8e has to be deflected radially outward during removal so that the inner edge of the profiling 8e is guided past the shoulder 11. that can. It makes sense that the dimension of the shoulder 11 or the profiling 8e is selected such that this deflection remains in the elastic deformation region of the blank 8. For then the wall 8b springs back after the removal back into the shape that was generated by the deformation in the second sub-step.
- the deflection is not purely elastic, but in addition is accompanied by a plastic deformation. Then, however, the dimension of the shoulder 11 and the profiling 8e is to be selected such that after the reshaping of the elastic portion of the deflection, the profiling 8e still points sufficiently radially inward is trained. That is, in this case, by rolling up, the profiling 8e is deformed further inward than is required for further processing.
- FIG. 8 schematically shows a top view of a device 16 with the molding tool from FIGS. 7a and 7b.
- the apparatus 16 in this example comprises a number of a total of 8 forming stations 17 which are arranged on a circle (indicated by a dashed line) equidistant from one another and rotate about the center of this circle. Of the 8 forming stations 17, only the 3 engaged ones are shown in the figure.
- Each forming station 17 has a mold block 10 on which a blank 8 can be placed.
- each forming station 17 has a reel-up 12 which is held by a carrier arm assembly 18.
- the blank 8 is fed to the device 16 from the left and arranged on the rotating mold block 10. While the device 16 with all associated forming stations 17 rotates counterclockwise, the blank 8 is deformed by the rolling. After a partial rotation of the device 16 by about 180 ° leaves the blank 8 in the illustration of Figure 8 to the right the device 16. In the subsequent partial rotation of the mold block 10 is unoccupied until it is again provided on the left with a new blank 8 , During the deformation of the occupied with a blank 8 mold block 10 is rotated about its longitudinal axis, which is perpendicular to the plane. As a result, the blank 8 at its entire outer circumference with the profiling invention Mistake. For clarification, a cross section through the blank 8 'is shown in each case before the forming and by the blank 8 "after the deformation in the figure.
- FIG. 9 shows a further device 19 for carrying out the deformation according to the invention in the second partial step.
- the device has a number of a total of 8 circular, equidistantly spaced die blocks 10 which rotate counterclockwise about their common center axis. Furthermore, each mold block 10 additionally rotates about its longitudinal axis which is perpendicular to the plane of the drawing.
- the blank 8 is also fed from the right-hand side (referring to the illustration of the drawing) in the device 19 and, after a partial rotation of the device 19, is released from it by about 180 ° ,
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Containers Having Bodies Formed In One Piece (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
- Table Devices Or Equipment (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
- Polymerisation Methods In General (AREA)
- Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL04762740T PL1663541T3 (en) | 2003-09-04 | 2004-09-02 | Method for producing a cup-shaped object |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE20320442 | 2003-09-04 | ||
PCT/DE2004/001953 WO2005023451A1 (en) | 2003-09-04 | 2004-09-02 | Method for producing a cup-shaped object |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1663541A1 true EP1663541A1 (en) | 2006-06-07 |
EP1663541B1 EP1663541B1 (en) | 2010-05-05 |
Family
ID=34258792
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP04762740A Active EP1663541B1 (en) | 2003-09-04 | 2004-09-02 | Method for producing a cup-shaped object |
Country Status (7)
Country | Link |
---|---|
US (1) | US7661286B2 (en) |
EP (1) | EP1663541B1 (en) |
AT (1) | ATE466677T1 (en) |
DE (2) | DE112004002141D2 (en) |
ES (1) | ES2343463T3 (en) |
PL (1) | PL1663541T3 (en) |
WO (1) | WO2005023451A1 (en) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2006103293A1 (en) * | 2005-04-01 | 2006-10-05 | Crown Packaging Technology, Inc. | Method for the production of metal closures |
US10875076B2 (en) | 2017-02-07 | 2020-12-29 | Ball Corporation | Tapered metal cup and method of forming the same |
US11370579B2 (en) | 2017-02-07 | 2022-06-28 | Ball Corporation | Tapered metal cup and method of forming the same |
USD950318S1 (en) | 2018-05-24 | 2022-05-03 | Ball Corporation | Tapered cup |
USD906056S1 (en) | 2018-12-05 | 2020-12-29 | Ball Corporation | Tapered cup |
USD968893S1 (en) | 2019-06-24 | 2022-11-08 | Ball Corporation | Tapered cup |
USD953811S1 (en) | 2020-02-14 | 2022-06-07 | Ball Corporation | Tapered cup |
USD974845S1 (en) | 2020-07-15 | 2023-01-10 | Ball Corporation | Tapered cup |
USD1012617S1 (en) | 2021-02-22 | 2024-01-30 | Ball Corporation | Tapered cup |
DE102021126646A1 (en) | 2021-10-14 | 2023-04-20 | MAIKO Engineering Gesellschaft mit beschränkter Haftung | Tool for forming coated sheet metal blanks |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE233036C (en) | ||||
DE433094C (en) | 1923-01-07 | 1926-08-20 | Bernardin Bottle Cap Co | Process for deep-drawing bottle caps consisting of one piece |
US1671990A (en) * | 1927-03-09 | 1928-06-05 | American Metal Cap Co | Machine for making caps |
US1775738A (en) * | 1928-12-07 | 1930-09-16 | Arthur H Parker | Machine for forming can covers |
US2119662A (en) | 1936-09-03 | 1938-06-07 | Hazel Atlas Glass Co | Method of manufacturing container closures |
US3015294A (en) * | 1955-07-22 | 1962-01-02 | Lyon Inc | Method of making wheel covers |
DD233036A3 (en) * | 1982-11-04 | 1986-02-19 | Fz F Umform U Plastverarbeitun | METHOD AND TOOL FOR DEFLECTING SHEET MOLDED PARTS |
US4567746A (en) * | 1984-01-16 | 1986-02-04 | Dayton Reliable Tool & Mfg. Co. | Method and apparatus for making shells for cans |
DE3704895A1 (en) | 1987-02-17 | 1988-08-25 | Rasselstein Ag | METHOD FOR PRODUCING A DRAWING TANK FROM SHEET METAL |
JP2825138B2 (en) * | 1991-03-12 | 1998-11-18 | トヨタ自動車株式会社 | Bending type |
JP2513379B2 (en) | 1991-10-02 | 1996-07-03 | 東洋製罐株式会社 | Drawing method for organic coated metal materials |
DE19581564B3 (en) * | 1995-01-27 | 2004-06-03 | Kanemitsu Corp., Akashi | Method of making a multiple V-belt pulley from sheet metal |
US5740609A (en) * | 1995-12-08 | 1998-04-21 | Motor Wheel Corporation | Method of making one-piece vehicle wheels and the like |
US6038910A (en) * | 1998-12-30 | 2000-03-21 | Can Industry Products, Inc. | Method and apparatus for forming tapered metal container bodies |
-
2004
- 2004-09-02 EP EP04762740A patent/EP1663541B1/en active Active
- 2004-09-02 ES ES04762740T patent/ES2343463T3/en active Active
- 2004-09-02 DE DE112004002141T patent/DE112004002141D2/en not_active Withdrawn - After Issue
- 2004-09-02 DE DE502004011137T patent/DE502004011137D1/en active Active
- 2004-09-02 US US10/570,356 patent/US7661286B2/en active Active
- 2004-09-02 PL PL04762740T patent/PL1663541T3/en unknown
- 2004-09-02 AT AT04762740T patent/ATE466677T1/en not_active IP Right Cessation
- 2004-09-02 WO PCT/DE2004/001953 patent/WO2005023451A1/en active Application Filing
Non-Patent Citations (1)
Title |
---|
See references of WO2005023451A1 * |
Also Published As
Publication number | Publication date |
---|---|
EP1663541B1 (en) | 2010-05-05 |
DE112004002141D2 (en) | 2006-07-13 |
ATE466677T1 (en) | 2010-05-15 |
PL1663541T3 (en) | 2010-09-30 |
US20060283228A1 (en) | 2006-12-21 |
WO2005023451A1 (en) | 2005-03-17 |
ES2343463T3 (en) | 2010-08-02 |
US7661286B2 (en) | 2010-02-16 |
DE502004011137D1 (en) | 2010-06-17 |
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