Device and method for pressing a plastically deformable blank
AssigneeMarkram Development AB
InventorMark Jansson
Life of this patent
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Abstract
The invention concerns a device and a method for continuous pressing of a plastically deformable blank into a three-dimensional section with a predetermined cross-sectional area, comprising a substantially cylindrical, fixed die, an opening formed in the die, through which the plastic blank is intended to be pressed, and at least one rotary die arranged adjacent to the opening, the rotary die having one or more recesses in its peripheral surface for forming the blank, during the rotation of the die, into at three-dimensional section with transverse sectional parts. According to the invention, the rotary die has a varying pitch radius as measured from the axis (C), which allows pressing of sections with varying cross section.
Claims31
A device for continuous pressing of a plastically deformable blank into a three-dimensional section with a predetermined cross-sectional area, comprising
- a fixed die with an opening formed therein, through which the plastically deformable blank is intended to be pressed, and
- at least one die arranged adjacent to the opening and rotatable around an axis extending transversely of the pressing direction, the die having one or more recesses in its peripheral surface for forming the blank into a three-dimensional section with transverse sectional parts during the rotation of the die,
- wherein the rotary die has a varying pitch radius as seen from the axis, which allows pressing of sections with varying cross section.
A method for pressing a plastically deformable blank into a three-dimensional section with a predetermined cross-sectional area, comprising pressing the blank past an opening of at least one die rotatably arranged around an axis extending transversely of the pressing direction and having one or more recesses in its peripheral surface, so that the blank is formed by the rotation of the die, thereby determining the final shape of the three-dimensional section,
- wherein the rotary die has a varying pitch radius as seen from the axis, which allows pressing of sections with varying cross section.
Dependencies are inferred from the claim text.