Method of making a composite riser
AssigneeSpenco
InventorsAlbert A Andrews, Spencer Land
Life of this patent
Estimating the term…
Abstract
A composite riser for an archery bow formed from fibers embedded in resin in such a way that resin rich areas, dry fibers and voids are eliminated, providing consistent risers of high quality. The location of structural fibers, such as a carbon fibers or fiberglass composite materials, is ensured within a mold used to form the riser and relative to the resin which bonds the fibers together. Various processes may be used to form the riser with control of the fibers and resin maintained. For example, structural reaction injection molding, liquid composite molding, continuous fiber molding, modified compression molding, resin transfer molding and variable infusion molding processes can be used.
Claims18
A method of making a composite riser for an archery bow, comprising the steps of:
- a) orienting at least one sheet of fibers rolled substantially into an elongate cylinder in a mold such that the ends of the cylinder are located inboard of an outer surface of the riser;
- b) providing a resin onto the fibers and between adjacent fibers;
- c) maintaining the orientation of the fibers in the mold even after the mold is closed;
- d) molding the resin and fibers under pressure;
- and
- e) curing the resin to form a composite riser.
A method of forming a composite riser for an archery bow, comprising the steps of:
- a) applying resin to elongate fiber strands;
- b) forming sheets from the fiber strands and resin;
- c) rolling at least one sheet substantially into an elongate cylinder;
- d) arranging the substantially cylindrical rolled sheets in a mold to provide a desired orientation of the fiber strands in the sheet;
- e) applying pressure and heat to the mold to mold the sheets into an integral part;
- and
- f) curing the resin to form the composite riser, wherein the ends of the sheets are located substantially inboard of an outer surface of the finished riser.
Dependencies are inferred from the claim text.