Double wall composite drum assembly and process for manufacturing same
Assignee9387-6670 Québec Inc.
InventorsSylvain Patry, Jean-Luc Richard
Life of this patent
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Abstract
The present disclosure concerns process for manufacturing a closed head composite drum assembly, comprising: providing an inner shell defining a material-receiving cavity forming a material-filling opening in the inner shell; rotomolding at least partially a closed head outer drum defining an inner shell-containing cavity, the closed head outer drum at least partially enclosing the inner shell; and forming a bung opening in the closed head outer drum substantially in register with the material-filling opening. It also concerns a double wall closed head drum assembly.
Claims17
A process for manufacturing a closed head composite drum assembly, comprising:
- providing an inner shell defining a material-receiving cavity forming a material-filling opening in the inner shell;
- providing a bottom spacing member;
- providing a rotational molding apparatus defining a barrel-forming cavity and comprising a bottom mold portion;
- opening the rotational molding apparatus;
- inserting the inner shell in the barrel-forming cavity;
- removably mounting the inner shell to the bottom mold portion of the rotational molding apparatus via the bottom spacing member, a base of the inner shell being at least partially spaced apart from an inner surface of the bottom mold portion;
- closing the rotational molding apparatus;
- rotomolding at least partially a closed head outer drum defining an inner shell-containing cavity, the closed head outer drum at least partially enclosing the inner shell, the closed head outer drum having a drum base with a stopper-receiving aperture formed therein with the bottom spacing member at least partially engaged therewith;
- and
- forming a bung opening in the closed head outer drum substantially in register with the material-filling opening.
A closed head drum composite assembly, comprising:
- a closed head outer drum defining an inner shell-containing cavity forming a bung opening in the closed head outer drum;
- and
- an inner shell at least partially contained in the inner shell-containing cavity, a material-filling opening being formed in the inner shell substantially in register with the bung opening;
- wherein the closed head outer drum comprises a drum base with a stopper-receiving aperture formed therein;
- wherein the closed head outer drum further comprises an inner base-abutting portion engaged with the stopper-receiving aperture;
- wherein the closed head outer drum is at least partially made of plastic.
Dependencies are inferred from the claim text.