WO1997039848A1 - System and process for necking containers - Google Patents
System and process for necking containers Download PDFInfo
- Publication number
- WO1997039848A1 WO1997039848A1 PCT/US1997/005205 US9705205W WO9739848A1 WO 1997039848 A1 WO1997039848 A1 WO 1997039848A1 US 9705205 W US9705205 W US 9705205W WO 9739848 A1 WO9739848 A1 WO 9739848A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- radius
- reduction
- distance
- subsequent
- reduce
- Prior art date
Links
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
- B21D51/26—Making hollow objects characterised by the use of the objects cans or tins; Closing same in a permanent manner
- B21D51/2615—Edge treatment of cans or tins
-
- 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
- B21D51/26—Making hollow objects characterised by the use of the objects cans or tins; Closing same in a permanent manner
- B21D51/2615—Edge treatment of cans or tins
- B21D51/2638—Necking
Definitions
- This invention relates broadly to the field of metallic containers, such as the two-piece cans that are used for packaging beverages such as soft drinks and juices. More specifically, this invention relates to an improved process and system for necking metallic containers that will result in fewer defects and in more efficient manufacturing than was heretofore thought possible.
- Two piece metal containers such as those manufactured by the assignee of this invention, Crown Cork & Seal Company, are in common use throughout the world for packing beverages and other goods.
- a metal blank is impact extruded or deep drawn to produce a cylindrical body and an integral bottom end wall.
- the second piece of the two-piece container consists of an end panel that is separately formed and attached to the upper end of the cylindrical body by a double seaming process.
- containers manufactured according to this process had a larger outside diameter along the upper edge where the double seaming operation has been performed than the diameter of the remainder of the container.
- a multi-pack carrier such as a so-called six-pack carton which grips the upper double seam
- the package when viewed from the end, would be slightly trapezoidal in shape.
- most two-piece beverage containers are now being manufactured with a reduced diameter neck portion that is produced on the upper free edge of the integral body and bottom wall so that when a double seam is formed, the outer edges of the seam are approximately parallel or flush with the outer peripheral surface of the remainder of the can body. This provides a more compact packing of cans which in turn lowers the total shipping and storage costs. Because of the reduced cost and the pleasing esthetics of these types of containers, the demand for containers of this type is substantial and is continually increasing.
- the reduction or necking process is performed incrementally by passing the open end of the can body through a number of reduction dies, each successive reduction die reforming the necked area to a slightly smaller diameter.
- the reduction increment from one die to the next was preferably kept constant throughout the entire process.
- a process of incrementally necking an upper end of a metallic container that has a first radius includes, according to a first aspect of the invention, steps of die pressing the upper end of the metallic container so the upper end is reformed to a second radius, the second radius being less than the first radius by a first distance; and then die pressing the upper end of the metallic container so the upper end is reformed to a third radius that is less than the second radius by a second distance, and wherein the second distance is greater than the first distance, whereby the process is performed in steps that increase in the amount of radial reduction that is applied, rather than in equal amounts of reduction as has heretofore been conventional.
- a process of incrementally necking an upper end of a metallic container includes steps of performing a first stage operation to reduce a radius of the upper end by a first distance; performing a first subsequent operation that is subsequent to the first operation to reduce the radius of the upper end by a second distance; performing a second subsequent operation that is subsequent to the first subsequent operation to reduce the radius of the upper end by a third distance; and performing a third subsequent operation that is subsequent to the second subsequent operation to reduce the radius of the upper end by a fourth distance, and wherein the third distance is larger than the second distance and the fourth distance is larger than the third distance, whereby the increments of reduction become larger as the radius of the can end becomes smaller and wall thickness increases.
- An improved process of necking an upper end of a metallic container that will reduce the incidence of defects such as wrinkles and puckers during the necking process, according to a third aspect of the invention steps of performing a first stage operation to reduce a radius of the upper end by a first distance; and incrementally further reducing the radius of the upper end by performing a plurality of subsequent reduction operations on the upper end, this second step being performed so that the amount of radius reduction that is applied by earlier of the subsequent reduction operations is less than the amount of radius reduction that is applied by later of the subsequent reduction operations, whereby increases of wall thickness that occur during the subsequent reduction operations will be utilized to permit greater radial reduction in the later steps, and will ease the amount of radial reduction in the earlier steps when compared to processes heretofore known or practiced.
- FIGURE 1 is a diagrammatical depiction of a necking process that is performed according to a first embodiment of the invention
- FIGURE 2 is a diagrammatical depiction of the necking process shown in FIGURE 1;
- FIGURE 3 is a diagrammatical depiction of a necking process that is performed according to a second embodiment of the invention;
- FIGURE 4 is a diagrammatical depiction of the necking process shown in FIGURE 3.
- FIGURE 5 is a diagrammatical view of a system for performing the processes which are depicted in FIGURES 1-4.
- FIGURES 1 and 2 a preferred first embodiment of a process of incrementally necking an upper end 10 of a metallic container that has a first radius R c will be performed by an otherwise conventional necking die assembly 14 on a can body 16, as is diagrammatically depicted in FIGURE 5.
- a process according to the invention which is performed in accordance with the embodiments of FIGURES 1 and 2 will be a nine stage process, meaning that there are nine separate stages of radial reduction that are applied to the upper end 10 of the metallic container in order to reach the desired final configuration.
- an eleven stage process is shown, meaning that there are eleven separate stages of reduction to achieve the desired final configuration.
- this first stage operation reduces the radius R c by a distance that is approximately 0.0410 inches, which is about 18.39% of the entire diametrical reduction that is to be visited upon the can body during the entire process.
- the first stage will effect a radial reduction of approximately 0.0335 inches, which is about 14.89% of the total reduction that will be applied to the upper end 12 of the metallic container.
- the first stage operation is larger because it must form both an outer and an inner bend radius .
- a number of incremental subsequent operations must be performed to reform the upper end 10 of the metallic container to its desired final configuration. In the embodiment that is performed as shown in FIGURES 1 and 2, this is achieved by incrementally reducing the radius of the upper end 10 by eight different operations that are given the numelations "STAGE TWO" to "STAGE NINE".
- STAGE TWO the radius of the upper end 10
- STAGE NINE the subsequent operations, of which there ten, are labeled "STAGE TWO" through “STAGE ELEVEN".
- these subsequent reduction operations that are performed on the upper end 10 of the metallic container are categorized such that the amount of radius reduction that is applied by earlier of the subsequent reduction operations is less than the amount of radius reduction that is applied by later of the reduction operations.
- increases in wall thickness that occur during the initial reduction operations will be utilized to permit greater radial reduction in the later steps, which will ease the amount of radial reduction that is necessary in the earlier steps to achieve a desired final configura ion.
- This easing of the magitude of reduction in the earlier operations reduces the likelihood of wrinkling and pucking that might otherwise occur in earlier reduction steps.
- the STAGE TWO and STAGE THREE reductions are approximately 0.0210 inches, which constitute approximately 9.42% of the total desired radial reduction.
- STAGE FOUR and STAGE FIVE operations in this embodiment result in a radial reduction that is, for each operation, approximately 0.0225 inches, or about 10.09% of the final desired radial reduction.
- the STAGE SIX and STAGE SEVEN are greater, approximately 0.0235 inches or about 10.54% of the total desired reduction.
- the final two stages, which are STAGES EIGHT and NINE, are given in this embodiment radial reduction values of approximately 0.0240 inches, or about 10.76% of the total radial reduction.
- STAGES TWO and THREE constitute a radial reduction of approximately 0.0175 inches, or about 7.78% of the total desired reduction.
- the THIRD and FOURTH STAGES give a radial reduction of approximately 0.0185 inches, or about 8.22% of the final desired reduction.
- the SIXTH and SEVENTH reduction are approximately 0.0190 inches, which is approximately 8.44% of the desired overall reduction, while the STAGE SEVEN reduction is approximately 0.0195 inches, or about 8.76% of the total desired reduction.
- the EIGHTH STAGE reduction is approximately 0.0200 inches, or about 8.89% of the final desired reduction, while the TENTH and ELEVENTH STAGES are each of about approximately 0.0210 inches, or about 9.33% of the total desired reduction.
- one way to express one aspect of the invention is that, after the FIRST STAGE operation is performed, a first subsequent operation is performed to reduce the radius of the upper end by a second distance, and then a second subsequent operation is performed to reduce the radius of the upper end by a third distance.
- a third subsequent operation is than performed subsequent to the second subsequent operation to reduce the radius of the upper end by a fourth distance, and the third distance is larger than the second distance, and the fourth distance is larger than the third distance, so that the increments of reduction become larger as the radius of the can end become smaller and wall thickness increases.
- An aspect of the invention that occurs within the subsequent operation steps may be expressed as pressing the upper end of the metallic container 10 so that the upper end is preformed to a second radius that is less than an initial radius R c of the can body.
- This characterization of the invention would further include a step of, after the first step, by pressing the upper end of the metallic container so that the upper end is reformed to a third radius that is less than the second radius by a second distance, wherein the second distance is greater than the first distance so that the process is performed in steps that increase in the amount of radial reduction that is applied, rather than in equal amounts of reduction as as heretofore been conventional.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Containers Having Bodies Formed In One Piece (AREA)
- Rigid Containers With Two Or More Constituent Elements (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP97919973A EP0904169A1 (en) | 1996-04-22 | 1997-03-31 | System and process for necking containers |
BR9708812A BR9708812A (en) | 1996-04-22 | 1997-03-31 | Bottleneck formation process at the upper end of a metal container |
AU24281/97A AU2428197A (en) | 1996-04-22 | 1997-03-31 | System and process for necking containers |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US63604096A | 1996-04-22 | 1996-04-22 | |
US08/636,040 | 1996-04-22 | ||
US08/759,189 US5724848A (en) | 1996-04-22 | 1996-12-04 | System and process for necking containers |
US08/759,189 | 1996-12-04 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1997039848A1 true WO1997039848A1 (en) | 1997-10-30 |
Family
ID=27092515
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US1997/005205 WO1997039848A1 (en) | 1996-04-22 | 1997-03-31 | System and process for necking containers |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0904169A1 (en) |
AU (1) | AU2428197A (en) |
BR (1) | BR9708812A (en) |
CA (1) | CA2252504A1 (en) |
WO (1) | WO1997039848A1 (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10934104B2 (en) | 2018-05-11 | 2021-03-02 | Stolle Machinery Company, Llc | Infeed assembly quick change features |
US11097333B2 (en) | 2018-05-11 | 2021-08-24 | Stolle Machinery Company, Llc | Process shaft tooling assembly |
US11117180B2 (en) | 2018-05-11 | 2021-09-14 | Stolle Machinery Company, Llc | Quick change tooling assembly |
US11208271B2 (en) | 2018-05-11 | 2021-12-28 | Stolle Machinery Company, Llc | Quick change transfer assembly |
US11370015B2 (en) | 2018-05-11 | 2022-06-28 | Stolle Machinery Company, Llc | Drive assembly |
US11420242B2 (en) | 2019-08-16 | 2022-08-23 | Stolle Machinery Company, Llc | Reformer assembly |
US11534817B2 (en) | 2018-05-11 | 2022-12-27 | Stolle Machinery Company, Llc | Infeed assembly full inspection assembly |
US11565303B2 (en) | 2018-05-11 | 2023-01-31 | Stolle Machinery Company, Llc | Rotary manifold |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4403493A (en) * | 1980-02-12 | 1983-09-13 | Ball Corporation | Method for necking thin wall metallic containers |
WO1984003873A1 (en) * | 1983-03-28 | 1984-10-11 | Hans F Stoffel | Improved method and apparatus for making a necked container |
US5355710A (en) * | 1992-07-31 | 1994-10-18 | Aluminum Company Of America | Method and apparatus for necking a metal container and resultant container |
-
1997
- 1997-03-31 BR BR9708812A patent/BR9708812A/en not_active Application Discontinuation
- 1997-03-31 AU AU24281/97A patent/AU2428197A/en not_active Abandoned
- 1997-03-31 EP EP97919973A patent/EP0904169A1/en not_active Withdrawn
- 1997-03-31 WO PCT/US1997/005205 patent/WO1997039848A1/en not_active Application Discontinuation
- 1997-03-31 CA CA 2252504 patent/CA2252504A1/en not_active Abandoned
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4403493A (en) * | 1980-02-12 | 1983-09-13 | Ball Corporation | Method for necking thin wall metallic containers |
WO1984003873A1 (en) * | 1983-03-28 | 1984-10-11 | Hans F Stoffel | Improved method and apparatus for making a necked container |
US5355710A (en) * | 1992-07-31 | 1994-10-18 | Aluminum Company Of America | Method and apparatus for necking a metal container and resultant container |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10934104B2 (en) | 2018-05-11 | 2021-03-02 | Stolle Machinery Company, Llc | Infeed assembly quick change features |
US11097333B2 (en) | 2018-05-11 | 2021-08-24 | Stolle Machinery Company, Llc | Process shaft tooling assembly |
US11117180B2 (en) | 2018-05-11 | 2021-09-14 | Stolle Machinery Company, Llc | Quick change tooling assembly |
US11208271B2 (en) | 2018-05-11 | 2021-12-28 | Stolle Machinery Company, Llc | Quick change transfer assembly |
US11370015B2 (en) | 2018-05-11 | 2022-06-28 | Stolle Machinery Company, Llc | Drive assembly |
US11534817B2 (en) | 2018-05-11 | 2022-12-27 | Stolle Machinery Company, Llc | Infeed assembly full inspection assembly |
US11565303B2 (en) | 2018-05-11 | 2023-01-31 | Stolle Machinery Company, Llc | Rotary manifold |
US11420242B2 (en) | 2019-08-16 | 2022-08-23 | Stolle Machinery Company, Llc | Reformer assembly |
Also Published As
Publication number | Publication date |
---|---|
AU2428197A (en) | 1997-11-12 |
EP0904169A1 (en) | 1999-03-31 |
CA2252504A1 (en) | 1997-10-30 |
BR9708812A (en) | 1999-08-03 |
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