Method and apparatus for forming container end panels

Details Method and apparatus for forming container end panels Method and apparatus for forming container end panels

1988-03-03

1989-02-28

Schmidt, Frederick R.

Sheet metal container making

Method

Forming or treating metallic closure

413 56, 413 62, 72348, B21D 5144

Patent

active

048080527

ABSTRACT:
A method of forming a container end piece from a sheet of material includes the steps of forming an inverted cup by wiping a peripheral edge of the material over a die core ring, inverting the cup by advancing a punch core into the material, thereby forming a flanged area, a central bottom area and a chuckwall interconnected thereto by a radiused portion. The radiused portion is initially formed by an annular nose on the punch core larger than the final radius. The punch core is then retracted and exerts force on the flanged area to shorten the chuckwall and reduce the radius by forcing the material in the chuckwall and radiused areas into the space between a die core and die core ring. A modified method includes supporting and aligning the radiused area with a contoured knockout sleeve between the die core and die core ring. The apparatus includes a punch core having a radiused annular nose which can be advanced into the inverted cup to form a reversed cup having a flanged area, a chuckwall and a central bottom area with the chuckwall interconnected to the central bottom area by a radiused portion conforming to the radius on the punch core. The apparatus further includes a die core and a die core ring which are concentric and spaced apart and also includes a pressure sleeve acting on the flanged area to force material from the chuckwall and the radiused area into the space between the die core and die core ring, thereby shortening the chuckwall and tightening the radius.

REFERENCES:
patent: 3537291 (1970-11-01), Hawkins
patent: 4031837 (1977-06-01), Jordan
patent: 4054228 (1977-10-01), Balocca et al.
patent: 4093102 (1978-06-01), Kraska
patent: 4109599 (1978-08-01), Schultz
patent: 4516420 (1985-05-01), Bulso, Jr. et al.
patent: 4549424 (1985-10-01), Bulso, Jr. et al.
patent: 4571978 (1986-02-01), Taube et al.

Affiliated with

Also associated with

Rating

Method and apparatus for forming container end panels does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and apparatus for forming container end panels, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for forming container end panels will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1362537