CA1214359A - Necked-in container body and apparatus for and method of forming same - Google Patents
Necked-in container body and apparatus for and method of forming sameInfo
- Publication number
- CA1214359A CA1214359A CA000409864A CA409864A CA1214359A CA 1214359 A CA1214359 A CA 1214359A CA 000409864 A CA000409864 A CA 000409864A CA 409864 A CA409864 A CA 409864A CA 1214359 A CA1214359 A CA 1214359A
- Authority
- CA
- Canada
- Prior art keywords
- radius
- turned
- container body
- tooling
- ring
- 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.)
- Expired
Links
Landscapes
- Containers Having Bodies Formed In One Piece (AREA)
Abstract
NECKED-IN CONTAINER BODY AND
APPARATUS FOR AND METHOD OF FORMING SAME
ABSTRACT OF THE DISCLOSURE
This relates to the necking-in of a free end portion of a container, and particularly a very thin wall can body, utilizing necking-in tooling. The tooling differs from conventional tooling in that in addition to the necking-in operation, it also serves radially inwardly to turn the free edge portion of the container body to facilitate leading-in of the necked-in portion into another tubular container component with the in-turned free edge portion also providing a section modulus which effects stiffening and form retaining of the free end portion. In addition, it has been found that conventional necking-in tooling for aluminum can bodies having a free edge thick-ness on the order of 0.0075 inch will not perform satis-factorily on like can bodies having a free edge thickness on the order of 0.006 inch, and that surprisingly by in-creasing an adjacent radius, the tooling will perform satisfactorily. This abstract forms no part of the speci-fication of this application and is not to be construed as limiting the claims of the application.
APPARATUS FOR AND METHOD OF FORMING SAME
ABSTRACT OF THE DISCLOSURE
This relates to the necking-in of a free end portion of a container, and particularly a very thin wall can body, utilizing necking-in tooling. The tooling differs from conventional tooling in that in addition to the necking-in operation, it also serves radially inwardly to turn the free edge portion of the container body to facilitate leading-in of the necked-in portion into another tubular container component with the in-turned free edge portion also providing a section modulus which effects stiffening and form retaining of the free end portion. In addition, it has been found that conventional necking-in tooling for aluminum can bodies having a free edge thick-ness on the order of 0.0075 inch will not perform satis-factorily on like can bodies having a free edge thickness on the order of 0.006 inch, and that surprisingly by in-creasing an adjacent radius, the tooling will perform satisfactorily. This abstract forms no part of the speci-fication of this application and is not to be construed as limiting the claims of the application.
Description
NECKED-I~ CONTAINER BODY ~ND
~PPARATUS FOR AND METHOD OF FORMING SAME
This invention particularly relates to a con-tainer body which is provided with a necked-in terminal portion which is to be telescoped within a further con-tainer component.
This invention in par-ticular relates to the necking-in of a terminal portion of a container body and the forming of the terminal edge portion in a radially inwardly turned portion so as to facilitate telescoping of the necked-in portion into another tubular container component.
The radially inwardly turned terminal edge portion of the container body not only facilitates the leading in of the container body into another tubular container component, but also provides a section modulus which stiffens and maintains the roundness of the ter-minal edge of the container body.
The inwardly turned portion at the free edge of the container body may, in accordance with this inven-tion, be automatically formed utilizing the tooling for effecting necking-in of the end portion of the container body. There is, however, the requirement that the in-wardly turned portion be stripable from the conventional center ring of the tooling.
In accordance with this invention, there is provided a method of necking-in a container body com-prising the steps of providing a neck-in ring and a center ring; said neck-in ring having an inner generally cylin-drical guide surface joined to a frustoconical necking surface by a first in-turned radius, an inner cylindrical sizing surface joined to said frustoconical necking ~J ~.
- lA -surface by an out-turned radius, said sizing surface terminating in a second in-turned radius; and said center ring having an outer cylindrical sizing surface termi-nating in a third in-turned radius, positioning said outer cylindrical sizing surface in telescoped radially opposing relation to said guide surface and said necking surface with said third in-turned radius generally radially opposing said out-turned radius; and with said neck-in ring and said center ring in said telescoped radially opposing relation effecting relative -telescoping thereof with a free end of a container body with the container body being guided into engagement with said first in-turned radius and said frustoconical necking surface and being radially inwardly shaped thereby until a free edge of the container body is generally overlappiny said out-turned radius and said third in-turned radius;
and then while retaining said center ring stationary relative to the container body continuing the telescoping of said neck-in riny and the container body until said second in-turned radius opposes said third in-turned radius to define on the container body a cylindrical end portion of reduced radius terminating in an in-turned terminal portion for facilitating the s-tarting of the cylindrical end portion into telescoped relation with another container component.
There is also provided neck-in tooling for necking-in a container body, said tooling comprising a neck-in ring and a center ring; said neck-in ring having an inner generally cylindrical guide surface joined to a frustoconical necking surface by a first in-turned radius, an inner cylindrical sizing surface joined to said frustoconical necking surface by an out-turned radius, said sizing surface terminating in a second in-turned radius, and said center ring having an outer cylindrical sizing surface terminating in a third 3~
in-turned radius; said second in-turned radius termi-nating in another inner surface of a diameter at its intersection with said second in-turned radius generally on the order of and substantially no less than the diameter of said center ring outer sizing surface whereby when said tooling is utilized to neck-in a container body a free end portion of the container body will be radially in-turned and curved in cross section by the cooperation of said second and third in--turned radii.
Another feature of this invention is the surprising results obtained by making minor changes in the dimension of radii of the neck-ring which will per-mit a necking-in tooling for a thicker metal to function with respect to thinner metal whereas tooling suitable for necking-in the thicker metal would not properly function.
With the above and other objects in view that will hereinafter appear, the nature of the invention will be more clearly understood by reference to -the following detailed description, the appended claims, and the several views illustrated in the accompanying drawings.
IN THE DRAWINGS:
-Figure 1 is a fragmentary sectional view takenthrough acontainer which has formed as part thereof a container body formed in accordance with this invention, and shows the container body necked-in end portion tele-scoped within another container component.
Figure 2 is a half-sectional view with parts broken away and shown in section of tooling operative to effect the necking-in of the container body and form-ing therein an inwardly directed free edge portion in accordance with this invention.
Figure 3 is a fragmentary half-sectional view of the tooling having been telescoped further relative to the container body and showing the center ring as being in a final fixed position relative to the container body~
~/;j j ~, `` ~ s~
Figure ~ is another fragmentary half-sectional view of the tooling, and shows the neck-in ring in a final position relative to the center ring and the con-~ainer body and cooperating with the center ring both to neck-in a terminal por-tion of the container body and radially in-wardly to deform the terminal edge portion of the con-tainer body.
Referring now to the drawings in detail, re~erence is first made to Figure 1 wherei~ there is illustrated a portion of a container which is formed of at least two pieces, the container being generally identified by the numeral 10. The container 10 includes a lower container member 12 which includes a cylindrical body 14 and pre-ferably is provided with an integral bottom end (not shown).
In accordance with this invention, the container body 14 is provided with a necked-in upper terminal portion 16 which, in turn, terminates in a radially inwardly directed and curved free edge portion 18.
The necked-in portion 16 is telescoped within a lower cylindrical body or skirt portion 20 of an upper container member 22. If desired, an adhesive layer 24 may be provided between the necked-in portion 16 and the con-tainer body 20. With or without the adhesive layer 24, it is preferred that the relative dimensions of the container body 20 and the necked-in portion 16 be such that there be an interference fit between them.
The inwardly turned terminal edge portion 18 not only functions as a convenient lead-in for effecting tele-scoping of the necked-in portion 16 into the container boay 20, but also functions as a section modulus to stiffen the necked-in portion 16 and to maintain the roundness there-of.
In accordance with this invention, the radially inwardly turne~ free edge portion 18 is shaped as a final step in the operation wherein the portion 16 is necked-in.
Referring now to Figure 2, it will be seen that there is illustrated suitable toolin~ for effecting the necking-in of the container body. This tooling includes a suitable support 26 on which the container member 12 is seated. Associated with the support 26 is necking-in tooling generally identified by the numeral 28.
The necking-in tooling includes a neck-in ring 30 which cooperates with a center ring 32. The neck-in ring 30 and the center ring 32 are illustrated as being carried by a press member or platen 34 with the neck-in ring 30 being ~ixedly positioned relative to the platen 34 while the centering ring 32 is urged away from the platen 34 by a compressible spring 36.
There is also provided a center post 38 which i~
fixed and is provided with a lower head 40 with which there is engaged a stop ring 42 carried by the center ring 32 and guided relative to the post 38. The head 40 serves to limit the downward movement of the center ring and the connection between the center ring and the platen 34 butthe spring 36 permits the neck-in ring 30 and the platen 34 to continue to move downwardly after the center ring has reached the lower end of its travel.
The neck-in ring has an internal configuration which for the most part is conventional in neck-in rings.
It has a lower yenerally cylindrical guide surface 44 which assures alignment of the up~er part of the container body with the necking-in tooling 28. The guide surface 34 is generally cylindrical, but preferably has a slight taper as is clearly shown.
The guide surface 34 terminates in a first in-turned radius 46 which connects to the guide surface 44 a frustoconical necking surface 48. The necking surface 48 terminates in an out-turned radius 50 which, in turn, terminates in a generally cylindrical outer sizing surface 52. The sizing surface 52 terminates in a second in-turned radius 54 w-hich, in turn, terminates by intersecting with a cylindrical surface 56.
The center ring 52 is of a relatively simple construction and includes an outer cylindrical sizing _5..
surface 5~ which, in turn, terminates in a third out-turned radius 60 which forms on .he center ring 32 an upper rounded corner.
Conventionally, necking in tooling includes a center ring and a neck-in ring of the general type illus-trated. ~owever, the relationship of the center ring and the neck-in ring with respect to the container body in the case of conventional cans is such that the necked-~n terminal portion is relatively long so that it may have the free end portion thereof outwardly flanged to facilitate the forming of a customary double seam with a can end. Accordingly, the equivalent of the second in-turned radius 5A does not exist in conventional tooling and the upper part of the center ring is rounded only for the purpose of avoiding a sharp corner.
It is to be understood that the center ring and the neck-in ring positioned as shown with the out-turned radius 50 generally opposing the third in-turned radius 60 as shown in Figure 1, the neck-in ring 30 and the center ring 32 are moved downwardly in unison and the container member 12 is either fixed ~r moved up~-ardly by means of ~he support 26 until the free upper edge of the container body engages the first in-turned radius 46 as shown in Figure 1.
At this point, necking-in is initiated and further tele-scoping movement of the center ring and neck-in ring rela-tive to the container body will result in the radially inward deformation of the free end portion of the container body 14 to define a genera~ly frustoconical end portion 62.
~elescoping of the tooling 28 with respect to the container body 1~ continues until the necked-in portion 62 has the free edge thereof generally between and aligned with the out-turned radius 50 and the third in-turned radius 60 as is shown in Figure 3. At this time, telescoping of the center ring relative to the container body ceases.
Further telescoping of the tooling relative to the container body is now restricted -to movement of the neck-in ring 30 both with respect to the container body 14 and the center ring 32 with the spring 36 being compressed.
As is best shown in ~igure 4, as the neck-in ring 30 moves downwardly relative to ~he container body and the center ring, the sizing surface 52 will wipe down the initially necked-in portion 62 about the sizin~ surface 58 of the center ring and the container body will be progressively radially inwardly deformed by the action of the first in-turned radius 46 and the nec};ing-in surface 48. The stroke of the platen 34 is such that ~o~ement of the neck-in ring 30 ceases when it reaches the posi.tion shown in Figure ~ and wherein the free edge portion of the container body is en~aged by the second in-turned radius and is radially inwardly directed~ Since the second in-turned radius 54 now opposes the third in-turn~d radius 60, it cooperates with the third in-turned rad-us 60 not onl.y radially inward-ly to deform the free edge portion-~ but also to effect a rounding thereof between the two radii 54, 60.
At this time it is pointea out that the terminal edge portion, which is the portion 18 of Figure 1, is turned slightly around the center ring 32. It is also to be noted that the diameter of the sizing surface 58 of the center ring 32 is substantially equal to or s].ightly greater than the dimension of the surface 56 and most particularly with respect to a circular line 64 (Figure 2) defining the intersection be~ween the second in-turned radius 54 and the surface 56.
As previously mentioned, tooling which is devoid of means for forming the in-turned free edge portion 18 has been utilized in the past to neck-in container bodies in a manner wherein end units of a diameter less than the diameter of the container body may be applied by a double seaming operation. Most particularly, aluminum can bodies having a free edge wall thickness on the order of 0.0075 inch have been successfully r.ecked-in with such prior tooling. However, when the same diameter can body but with a wall thickness at the terminal edge of 0.006 inch were attempted to be necked-in with like tooling, undue wrinkling and otherwise unsatisfactory necking-in occurred.
In that prior tooling the equivalent of the first in-turned radius 46 had a radius of 0.200 inch and the equivalent of the out-turned radius 50 had a radius of 0.050 inch. It has been surprisingly round that by reducing the radius of the first in-turned radius 46 to 0.100 inch and increasing the radius of the out-turned radius 50 to 0.080 inch, thinner wall can bodies could be successfully necked-in, Although only a preferred embodiment of the irven-tion has been illustrated and described herein, it is to be understood that minor variations may be made in the con-tainer construction, the tooling, and the method of utiliz-ing the tooling without departing from the spirit and scope of the invention as defined by the appended claims.
~PPARATUS FOR AND METHOD OF FORMING SAME
This invention particularly relates to a con-tainer body which is provided with a necked-in terminal portion which is to be telescoped within a further con-tainer component.
This invention in par-ticular relates to the necking-in of a terminal portion of a container body and the forming of the terminal edge portion in a radially inwardly turned portion so as to facilitate telescoping of the necked-in portion into another tubular container component.
The radially inwardly turned terminal edge portion of the container body not only facilitates the leading in of the container body into another tubular container component, but also provides a section modulus which stiffens and maintains the roundness of the ter-minal edge of the container body.
The inwardly turned portion at the free edge of the container body may, in accordance with this inven-tion, be automatically formed utilizing the tooling for effecting necking-in of the end portion of the container body. There is, however, the requirement that the in-wardly turned portion be stripable from the conventional center ring of the tooling.
In accordance with this invention, there is provided a method of necking-in a container body com-prising the steps of providing a neck-in ring and a center ring; said neck-in ring having an inner generally cylin-drical guide surface joined to a frustoconical necking surface by a first in-turned radius, an inner cylindrical sizing surface joined to said frustoconical necking ~J ~.
- lA -surface by an out-turned radius, said sizing surface terminating in a second in-turned radius; and said center ring having an outer cylindrical sizing surface termi-nating in a third in-turned radius, positioning said outer cylindrical sizing surface in telescoped radially opposing relation to said guide surface and said necking surface with said third in-turned radius generally radially opposing said out-turned radius; and with said neck-in ring and said center ring in said telescoped radially opposing relation effecting relative -telescoping thereof with a free end of a container body with the container body being guided into engagement with said first in-turned radius and said frustoconical necking surface and being radially inwardly shaped thereby until a free edge of the container body is generally overlappiny said out-turned radius and said third in-turned radius;
and then while retaining said center ring stationary relative to the container body continuing the telescoping of said neck-in riny and the container body until said second in-turned radius opposes said third in-turned radius to define on the container body a cylindrical end portion of reduced radius terminating in an in-turned terminal portion for facilitating the s-tarting of the cylindrical end portion into telescoped relation with another container component.
There is also provided neck-in tooling for necking-in a container body, said tooling comprising a neck-in ring and a center ring; said neck-in ring having an inner generally cylindrical guide surface joined to a frustoconical necking surface by a first in-turned radius, an inner cylindrical sizing surface joined to said frustoconical necking surface by an out-turned radius, said sizing surface terminating in a second in-turned radius, and said center ring having an outer cylindrical sizing surface terminating in a third 3~
in-turned radius; said second in-turned radius termi-nating in another inner surface of a diameter at its intersection with said second in-turned radius generally on the order of and substantially no less than the diameter of said center ring outer sizing surface whereby when said tooling is utilized to neck-in a container body a free end portion of the container body will be radially in-turned and curved in cross section by the cooperation of said second and third in--turned radii.
Another feature of this invention is the surprising results obtained by making minor changes in the dimension of radii of the neck-ring which will per-mit a necking-in tooling for a thicker metal to function with respect to thinner metal whereas tooling suitable for necking-in the thicker metal would not properly function.
With the above and other objects in view that will hereinafter appear, the nature of the invention will be more clearly understood by reference to -the following detailed description, the appended claims, and the several views illustrated in the accompanying drawings.
IN THE DRAWINGS:
-Figure 1 is a fragmentary sectional view takenthrough acontainer which has formed as part thereof a container body formed in accordance with this invention, and shows the container body necked-in end portion tele-scoped within another container component.
Figure 2 is a half-sectional view with parts broken away and shown in section of tooling operative to effect the necking-in of the container body and form-ing therein an inwardly directed free edge portion in accordance with this invention.
Figure 3 is a fragmentary half-sectional view of the tooling having been telescoped further relative to the container body and showing the center ring as being in a final fixed position relative to the container body~
~/;j j ~, `` ~ s~
Figure ~ is another fragmentary half-sectional view of the tooling, and shows the neck-in ring in a final position relative to the center ring and the con-~ainer body and cooperating with the center ring both to neck-in a terminal por-tion of the container body and radially in-wardly to deform the terminal edge portion of the con-tainer body.
Referring now to the drawings in detail, re~erence is first made to Figure 1 wherei~ there is illustrated a portion of a container which is formed of at least two pieces, the container being generally identified by the numeral 10. The container 10 includes a lower container member 12 which includes a cylindrical body 14 and pre-ferably is provided with an integral bottom end (not shown).
In accordance with this invention, the container body 14 is provided with a necked-in upper terminal portion 16 which, in turn, terminates in a radially inwardly directed and curved free edge portion 18.
The necked-in portion 16 is telescoped within a lower cylindrical body or skirt portion 20 of an upper container member 22. If desired, an adhesive layer 24 may be provided between the necked-in portion 16 and the con-tainer body 20. With or without the adhesive layer 24, it is preferred that the relative dimensions of the container body 20 and the necked-in portion 16 be such that there be an interference fit between them.
The inwardly turned terminal edge portion 18 not only functions as a convenient lead-in for effecting tele-scoping of the necked-in portion 16 into the container boay 20, but also functions as a section modulus to stiffen the necked-in portion 16 and to maintain the roundness there-of.
In accordance with this invention, the radially inwardly turne~ free edge portion 18 is shaped as a final step in the operation wherein the portion 16 is necked-in.
Referring now to Figure 2, it will be seen that there is illustrated suitable toolin~ for effecting the necking-in of the container body. This tooling includes a suitable support 26 on which the container member 12 is seated. Associated with the support 26 is necking-in tooling generally identified by the numeral 28.
The necking-in tooling includes a neck-in ring 30 which cooperates with a center ring 32. The neck-in ring 30 and the center ring 32 are illustrated as being carried by a press member or platen 34 with the neck-in ring 30 being ~ixedly positioned relative to the platen 34 while the centering ring 32 is urged away from the platen 34 by a compressible spring 36.
There is also provided a center post 38 which i~
fixed and is provided with a lower head 40 with which there is engaged a stop ring 42 carried by the center ring 32 and guided relative to the post 38. The head 40 serves to limit the downward movement of the center ring and the connection between the center ring and the platen 34 butthe spring 36 permits the neck-in ring 30 and the platen 34 to continue to move downwardly after the center ring has reached the lower end of its travel.
The neck-in ring has an internal configuration which for the most part is conventional in neck-in rings.
It has a lower yenerally cylindrical guide surface 44 which assures alignment of the up~er part of the container body with the necking-in tooling 28. The guide surface 34 is generally cylindrical, but preferably has a slight taper as is clearly shown.
The guide surface 34 terminates in a first in-turned radius 46 which connects to the guide surface 44 a frustoconical necking surface 48. The necking surface 48 terminates in an out-turned radius 50 which, in turn, terminates in a generally cylindrical outer sizing surface 52. The sizing surface 52 terminates in a second in-turned radius 54 w-hich, in turn, terminates by intersecting with a cylindrical surface 56.
The center ring 52 is of a relatively simple construction and includes an outer cylindrical sizing _5..
surface 5~ which, in turn, terminates in a third out-turned radius 60 which forms on .he center ring 32 an upper rounded corner.
Conventionally, necking in tooling includes a center ring and a neck-in ring of the general type illus-trated. ~owever, the relationship of the center ring and the neck-in ring with respect to the container body in the case of conventional cans is such that the necked-~n terminal portion is relatively long so that it may have the free end portion thereof outwardly flanged to facilitate the forming of a customary double seam with a can end. Accordingly, the equivalent of the second in-turned radius 5A does not exist in conventional tooling and the upper part of the center ring is rounded only for the purpose of avoiding a sharp corner.
It is to be understood that the center ring and the neck-in ring positioned as shown with the out-turned radius 50 generally opposing the third in-turned radius 60 as shown in Figure 1, the neck-in ring 30 and the center ring 32 are moved downwardly in unison and the container member 12 is either fixed ~r moved up~-ardly by means of ~he support 26 until the free upper edge of the container body engages the first in-turned radius 46 as shown in Figure 1.
At this point, necking-in is initiated and further tele-scoping movement of the center ring and neck-in ring rela-tive to the container body will result in the radially inward deformation of the free end portion of the container body 14 to define a genera~ly frustoconical end portion 62.
~elescoping of the tooling 28 with respect to the container body 1~ continues until the necked-in portion 62 has the free edge thereof generally between and aligned with the out-turned radius 50 and the third in-turned radius 60 as is shown in Figure 3. At this time, telescoping of the center ring relative to the container body ceases.
Further telescoping of the tooling relative to the container body is now restricted -to movement of the neck-in ring 30 both with respect to the container body 14 and the center ring 32 with the spring 36 being compressed.
As is best shown in ~igure 4, as the neck-in ring 30 moves downwardly relative to ~he container body and the center ring, the sizing surface 52 will wipe down the initially necked-in portion 62 about the sizin~ surface 58 of the center ring and the container body will be progressively radially inwardly deformed by the action of the first in-turned radius 46 and the nec};ing-in surface 48. The stroke of the platen 34 is such that ~o~ement of the neck-in ring 30 ceases when it reaches the posi.tion shown in Figure ~ and wherein the free edge portion of the container body is en~aged by the second in-turned radius and is radially inwardly directed~ Since the second in-turned radius 54 now opposes the third in-turn~d radius 60, it cooperates with the third in-turned rad-us 60 not onl.y radially inward-ly to deform the free edge portion-~ but also to effect a rounding thereof between the two radii 54, 60.
At this time it is pointea out that the terminal edge portion, which is the portion 18 of Figure 1, is turned slightly around the center ring 32. It is also to be noted that the diameter of the sizing surface 58 of the center ring 32 is substantially equal to or s].ightly greater than the dimension of the surface 56 and most particularly with respect to a circular line 64 (Figure 2) defining the intersection be~ween the second in-turned radius 54 and the surface 56.
As previously mentioned, tooling which is devoid of means for forming the in-turned free edge portion 18 has been utilized in the past to neck-in container bodies in a manner wherein end units of a diameter less than the diameter of the container body may be applied by a double seaming operation. Most particularly, aluminum can bodies having a free edge wall thickness on the order of 0.0075 inch have been successfully r.ecked-in with such prior tooling. However, when the same diameter can body but with a wall thickness at the terminal edge of 0.006 inch were attempted to be necked-in with like tooling, undue wrinkling and otherwise unsatisfactory necking-in occurred.
In that prior tooling the equivalent of the first in-turned radius 46 had a radius of 0.200 inch and the equivalent of the out-turned radius 50 had a radius of 0.050 inch. It has been surprisingly round that by reducing the radius of the first in-turned radius 46 to 0.100 inch and increasing the radius of the out-turned radius 50 to 0.080 inch, thinner wall can bodies could be successfully necked-in, Although only a preferred embodiment of the irven-tion has been illustrated and described herein, it is to be understood that minor variations may be made in the con-tainer construction, the tooling, and the method of utiliz-ing the tooling without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (8)
1. A method of necking-in a container body comprising the steps of providing a neck-in ring and a center ring; said neck-in ring having an inner generally cylindrical guide surface joined to a frustoconical necking surface by a first in-turned radius, an inner cylindrical sizing surface joined to said frustoconical necking surface by an out-turned radius, said sizing surface terminating in a second in-turned radius; and said center ring having an outer cylindrical sizing surface terminating in a third in-turned radius; positioning said outer cylindrical sizing surface in telescoped radially opposing relation to said guide surface and said necking surface with said third in-turned radius generally radially opposing said out-turned radius; and with said neck-in ring and said center ring in said telescoped radially opposing relation effecting relative telescoping thereof with a free end of a container body with the container body being guided into engagement with said first in-turned radius and said frusto-conical necking surface and being radially inwardly shaped thereby until a free edge of the container body is generally overlapping said out-turned radius and said third in-turned radius; and then while retaining said center ring station-ary relative to the container body continuing the telescop-ing of said neck-in ring and the container body until said second in-turned radius opposes said third in-turned radius to define on the container body a cylindrical end portion of reduced radius terminating in an in-turned terminal portion for facilitating the starting of the cylindrical end portion into telescoped relation with another container component.
2. A method in accordance with claim 1 wherein the container body in-turned terminal portion is radially inwardly curved by the cooperation of said in-turned radius engaging the free edge of the container body and forcing the free edge radially inwardly and around said third in-turned radius.
3. A method according to claim 1 wherein the resultant diameter of the container free edge is less than that of said center ring only to the extent that the necked-in container body can be stripped from said center ring.
4. Neck-in tooling for necking-in a container body, said tooling comprising a neck-in ring and a center ring; said neck-in ring having an inner generally cylindrical guide surface joined to a frustoconical necking surface by a first in-turned radius, an inner cylindrical sizing surface joined to said frustoconical necking surface by an out-turned radius, said sizing surface terminating in a second in-turned radius; and said center ring having an outer cylindrical sizing surface terminating in a third in-turned radius; said second in-turned radius terminating in an-other inner surface of a diameter at its intersection with said second in-turned radius generally on the order of and substantially no less than the diameter of said center ring outer sizing surface whereby when said tooling is utilized to neck-in a container body a free end portion of the con-tainer body will be radially in-turned and curved in cross section by the cooperation of said second and third in-turned radii.
5. Tooling in accordance with claim 4 together with means for first moving said center ring and said neck-in ring in unison to a preselected telescoped position relative to a container body and thereafter with the con-tainer body and center ring relatively fixed separately advancing said neck-in ring.
6. Tooling in accordance with claim 4 wherein said tooling is particularly adapted for necking-in aluminum can bodies having a wall thickness at the free edge thereof on the order of 0.006 inch and wherein the radius of said first in-turned radius is decreased and the radius of said out-turned radius is increased as compared to similar tool for can bodies having a wall thickness at the free edge thereof on the order of 0.075 inch.
7. Tooling in accordance with claim 6 wherein the radius of said first in-turned radius is on the order of 0.100 inch and the radius of said out-turned radius is on the order of 0.080 inch.
8. Tooling in accordance with claim 7 wherein the radius of said second in-turned radius is on the order of 0.060 inch and the radius of said third in-turned radius is on the order of 0.028 inch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000409864A CA1214359A (en) | 1982-08-20 | 1982-08-20 | Necked-in container body and apparatus for and method of forming same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000409864A CA1214359A (en) | 1982-08-20 | 1982-08-20 | Necked-in container body and apparatus for and method of forming same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1214359A true CA1214359A (en) | 1986-11-25 |
Family
ID=4123451
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000409864A Expired CA1214359A (en) | 1982-08-20 | 1982-08-20 | Necked-in container body and apparatus for and method of forming same |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1214359A (en) |
-
1982
- 1982-08-20 CA CA000409864A patent/CA1214359A/en not_active Expired
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4392764A (en) | Necked-in container body and apparatus for and method of forming same | |
| US4414836A (en) | Method of and apparatus for deep drawing metal containers | |
| US4808052A (en) | Method and apparatus for forming container end panels | |
| US4716755A (en) | Method and apparatus for forming container end panels | |
| US4715208A (en) | Method and apparatus for forming end panels for containers | |
| US5685189A (en) | Method and apparatus for producing container body end countersink | |
| US4713958A (en) | Method and apparatus for forming container end panels | |
| US4261193A (en) | Necked-in aerosol container-method of forming | |
| US4173883A (en) | Necked-in aerosol containers | |
| US3638597A (en) | Method of forming a rivet | |
| AU633091B2 (en) | Die assembly for and method of forming metal end unit | |
| US4503702A (en) | Tapered container and method and apparatus for forming same | |
| US4574608A (en) | Single station, in-die curling of can end closures | |
| US4527412A (en) | Method for making a necked container | |
| JPS5846369B2 (en) | Method of forming pressure-resistant end walls for containers | |
| US4102467A (en) | Tapered plastic container with seamed metal end and method for making it | |
| US3757558A (en) | Apparatus for necking-in tubular members | |
| US3845653A (en) | Double stage necking | |
| US4184444A (en) | Tapered plastic container with seamed metal end and method for making it | |
| US4555208A (en) | Method of fitting a metal closure | |
| US4372720A (en) | Forming of end closures | |
| US3680350A (en) | Necking-in die pilot | |
| US4723433A (en) | Method and apparatus for doming can bottoms | |
| US4753364A (en) | Necked container | |
| CA1214359A (en) | Necked-in container body and apparatus for and method of forming same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |