PROCESS FOR MAKING METALLIC HOLLOW ARTICLES

• US 3,759,205 A
• Filed: 06/04/1970
• Issued: 09/18/1973
• Est. Priority Date: 06/26/1967
• Status: Expired due to Term

• Current Assignee: Gilbert Dolveck
• Original Assignee: Gilbert Dolveck
• Inventors: Dolveck, Gilbert
• Primary Examiner(s): Herbst, Richard J.
• Assistant Examiner(s): Keenan, M. J.
• Application Number:
  US05/043,548
• Time in Patent Office: 1,202 Days
• Field of Search: 113/12R,12H,12M,12S,12W,12Z,12AA,1G,7A,116R,370 72/348,352,355,356,367 220/62
• US Class Current: 72/370.02
• CPC Class Codes: B21D 51/2646 Of particular non cylindrical shape, e.g. conical, rectangular, polygonal, bulged
• CPC Class Codes: Y10S 72/715 Method of making can bodies

Abstract

A process for making a hollow metallic article from a tubular blank closed at one end, comprises deforming the entire periphery of the wall of the said blank over its entire length from one end to the opposite end.

Claims

1. A process of making an aerosol dispensing or similar hollow container from a tubular blank closed at one end, which comprises supporting said blank by its closed end and performing a sequence of shaping steps each of which comprises relatively moving a shaping die axially of the blank toward the support by which said blank is supported, said die having a circumferentially continuous surface engaging an annular portion of said blank simultaneously throughout its circumference to effect a cold deforming of said engaged portion of said blank radially by different amounts in one direction relative to its longitudinal axis by axial movement of said die and repeating the shaping step with a different die engaging a part of the same portion of said blank to deform said blank radially by different amounts and in an opposite direction relative to said first-mentioned direction to produce a container having different cross sectional areas at different points along its length.

2. A process of making a container according to claim 1, in which the first-mentioned die engages the exterior of said blank to contract a portion of said blank by axial movement of said die and said different die engages the interior of said blank to expand a portion of said blank by axial movement of said different die.

3. A process of making a container according to claim 2, in which the first-mentioned die engages said blank to contract a portion of said blank so as to converge a part of said portion upwardly from said base and said different die subsequently engages an annular band of said contracted portion to expand said band to form an upwardly divergent portion.

4. A process of making a container according to claim 1, in which the first-mentioned die engages the interior of said blank to expand a portion of said blank by axial movement of said die and said different die engages the exterior of said blank to contract a portion of said blank by axial moVement of said other die.

5. A process of making a container according to claim 1, in which said first-mentioned die engages said blank to expand a portion of said blank so as to diverge upwardly from said base and said different die subsequently engages an annular band of said expanded portion to contract said band to form an upwardly convergent portion.

6. A process of making a container according to claim 1, in which the fiRst-mentioned die progressively contracts said blank so as to taper convergently upwardly substantially its entire axial length.

7. A process of making a container according to claim 1, in which the first-mentioned die progressively expands said blank to diverge upwardly substantially its entire axial length.

8. A process of making a container according to claim 1, in which the first-mentioned die contracts said blank deforming said engaged portion along less than the axial length of said blank.

9. A process of making a container according to claim 1 in which the first-mentioned die expands said blank deforming said engaged portion along less than the axial length of said blank.

10. A process of making an aerosol dispensing or similar hollow container from a tubular blank closed at one end, which comprises supporting said blank by its closed end and performing a sequence of shaping steps each of which comprises relatively moving a shaping die axially of the blank toward the support by which said blank is supported, said die having a circumferentially continuous surface engaging an annular portion of said blank simultaneously throughout its circumference to effect a cold deforming of said engaged portion of said blank radially by axial movement of said die, repeating said shaping step with different dies engaging the same or different portions of said blank to deform different portions of said blank radially by different amounts to produce a container having different cross sectional areas at different points along its length, at least one of said dies engaging the exterior of said blank to contract a portion of said blank by axial movement of said die and at least one other of said dies engaging the interior of said blank to expand a portion of said blank by axial movement of said other die, and at least one of said dies engaging said blank to contract a portion of said blank so as to converge upwardly from said base and at least one other die subsequently engages an annular band of said contracted portion to expand said band to form an upwardly divergent portion.

11. A process of making an aerosol dispensing or similar hollow container from a tubular blank closed at one end, which comprises supporting said blank by its closed end and performing a sequence of shaping steps each of which comprises relatively moving a shaping die axially of the blank toward the support by which said blank is supported, said die having a circumferentially continuous surface engaging an annular portion of said blank simultaneously throughout its circumference to effect a cold deforming of said engaged portion of said blank radially by axial movement of said die, repeating said shaping step with different dies engaging the same or different portions of said blank to deform different portions of said blank radially by different amounts to produce a container having different cross sectional areas at different points along its length, a series of said dies successively engaging the exterior of said blank progressively to contract said blank so as to form an upwardly convergent portion above the closed end thereof and a second series of said dies subsequently successively engaging the interior of a portion of said blank spaced from the closed end thereof to expand said portion of said blank to form an upwardly divergent portion above said convergent portion, and subsequently engaging the exterior of a third portion of said blank above said upwardly divergent portion successively with a series of said dies to contract said third portion to form an upwardly convergent portion of said blank above said upwardly divergent portion.