Extrusion die
AssigneePreform Dies Limited
InventorEdward Feldcamp
Life of this patent
Estimating the term…
Abstract
An extrusion die comprises a die body defining a die cavity (18). The cavity (18) is shaped such that the die body includes a male portion (24) and a female portion (26). A leading edge (18a) of a part of one side of the die cavity (18) is out of alignment with a leading edge (18a) of an opposing part of the die cavity (18), at rest, such that, in use, when deflection of parts of the die occurs, the leading edges (18a) substantially align.
Claims10
An extrusion die comprising a die body having a die cavity formed therein, the die body defining a male portion which projects into a female portion, wherein a leading edge of a part of the die cavity defined by the male portion and a leading edge of an opposing part of the die cavity defined by the female portion are out of alignment with one another when the die is not in use.
A die as claimed in any one of the preceding claims, wherein the die cavity is of zero bearing form.
A die as claimed in any one of the preceding claims, wherein the male and female portions co-operate to produce, in use, an extrusion having at least one channel shaped region.
A die as claimed in any one of the preceding claims wherein the male and female portions co-operate to produce, in use, an extrusion including at least one hollow region.
A method of manufacturing an extrusion die comprising determining how much at least a part of the die will deflect, in use, and forming a recess around at least part of a die cavity of the die, the recess being of non-uniform depth, the depth of the recess being chosen to ensure that, in use, the leading edge of a part of one side of the die cavity substantially aligns with that of an opposing part of the die cavity.
An extrusion die substantially as hereinbefore described with reference to the accompanying drawings.
Dependencies are inferred from the claim text.