Metal spinning process and apparatus and product made thereby
OwnerJohn C. Merloneinventor
Life of this patent
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Abstract
In a metal spinning process and apparatus for necking down a container having an open end, a closed end and generally cylindrical inner and outer surfaces, a resilient pressure bladder is inserted into the container prior to the necking down operation. Pressure is maintained in the bladder throughout the operation to prevent crumpling of the container body. The invention is particularly useful on thin walled, deep drawn steel containers.
Claims42
A process for forming a surface configuration on a metal container body comprising the steps of:
- providing a metal container body having an open end, a closed end and generally cylindrical inner and outer surfaces;
- inserting a resilient pressure means through said open end of said container body and into contact with said inner surface thereof;
- rotating said container body and said resilient pressure means together around their longitudinal axes;
- providing a metal forming tool with a forming portion thereon spaced from said outer surface of said container;
- providing relative movement between said forming portion of said metal forming tool and said rotating container body so said forming portion engages and deforms said container to produce a desired shape thereon and deforms said resilient pressure means therein;
- and
- removing said resilient pressure means through open end of said container body.
An apparatus for forming a surface configuration on a metal container body comprising:
- means providing a metal container body having an open end, a closed end and generally cylindrical inner and outer surfaces;
- a resilient pressure means insertable through said open end of said container body and into contact with said inner surface thereof;
- means for rotating said container body and said resilient pressure means together around their longitudinal axes;
- a metal forming tool with a forming portion thereon spaced from said outer surface of said container;
- means for providing relative movement between said forming portion of said metal forming tool and said container body so said forming portion engages and deforms said container to produce a desired shape thereon and deforms said resilient pressure means therein;
- and
- means for manipulating said resilient pressure means to insert and remove the same through said open end of said container body.
The apparatus for forming a surface configuration on a metal container body in accordance with claim 36, wherein said rotating means includes a power source for positively rotating said container which in turn rotates said resilient pressure means therewith.
Dependencies are inferred from the claim text.