Device for manufacturing chopped fiber bundle and method for manufacturing same

Abstract

Provided is a device for manufacturing a chopped fiber bundle that is provided with a cutter roll obtained by attaching one or a plurality of disc blades on the outer circumferential surface of a rollmain body such that the axis of rotation of the roll main body matches the center axis, and a nip roll disposed parallel to the direction of the axis of rotation of the roll main body, and that feedsreinforcing fiber yarn between the nip roll and cutter roll and continuously cuts the same, wherein the device is characterized by being provided with at least a rotary drive mechanism for rotating the cutter roll, and also being provided with a back and forth drive mechanism for back and forth drive of the cutter roll in the direction of the axis of rotation of the cutter roll, and/or a traverseguide for traversing the reinforcing fiber yarn in the direction of the axis of rotation of the roll main body. The present invention provides a device for manufacturing a chopped fiber bundle that can, by means of a simple device, continuously cut the reinforcing fiber yarn obliquely, and further, that is provided with a traverse guide that makes oblique cutting at a small angle possible, and provides a method for manufacturing a chopped fiber bundle.

Description

Technical field [0001] The present invention relates to a manufacturing device and a method for manufacturing a chopped fiber bundle that has good impregnation, fluidity, and molding followability when used as a molding material, and exhibits excellent mechanical properties when made into fiber reinforced plastics . Background technique [0002] For fiber-reinforced plastics formed from reinforcing fibers and matrix resins, due to their specific strength, high specific elastic modulus, excellent mechanical properties, high functional properties such as weather resistance and chemical resistance, they are used in industrial applications It has also received attention, and its demand has increased year by year. Among them, as a molding method suitable for complex shapes such as three-dimensional shapes, a molding material formed of a bundle of discontinuous reinforcing fibers (for example, carbon fibers) (hereinafter, also referred to as fiber bundles) and a matrix resin is used. ...

AI Technical Summary

Problems solved by technology

For example, if a fiber with a cutting angle of 5° is to be obtained, the yarn path needs to be introduced into the cutting roller at an angle of 85°, which means that the fiber direction is roughly parallel to the rotation axis of the cutter while being introduced, and the fiber is kept at such an angle. It is very difficult to continuously introduce the fiber at a constant angle while maintaining the shape of the fiber

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