Continuous fiber-reinforced composite three-dimensional printing consumable and preparation method thereof, and three-dimensional printing method and article manufactured thereby

A continuous fiber-reinforced composite three-dimensional printing consumable, comprising:

• a continuous fiber core material and a sheath fiber-braided sleeve;
• wherein the continuous fiber core material is wrapped in a lumen of the sheath fiber-braided sleeve, and/or the continuous fiber core material is interweaved within a sleeve wall of the sheath fiber-braided sleeve;
• the continuous fiber core material comprises one or more selected from the group consisting of a carbon fiber, a glass fiber, a basalt fiber, a polymer fiber, a metal fiber, a ceramic fiber, and a bio-based fiber;
• and
• a sheath fiber used for the sheath fiber-braided sleeve is a polymer fiber, and the sheath fiber-braided sleeve is a weaved sleeve and/or a knitted sleeve, with a weaving angle or a knitting angle of 5° to 85°;
• a number of layers in the sleeve wall of the sheath fiber-braided sleeve is ≥1;
• and a mass ratio of the continuous fiber core material to the sheath fiber-braided sleeve is in a range of 1-80:20-99;
• under a condition that the continuous fiber core material is wrapped in the lumen of the sheath fiber-braided sleeve, a distribution pattern of the continuous fiber core material in a cross-section of a three-dimensional printing consumable is eccentric distribution;
• the continuous fiber-reinforced composite three-dimensional printing consumable further comprises an auxiliary positioning fiber;
• the auxiliary positioning fiber and the continuous fiber core material are collectively wrapped within the lumen of the sheath fiber-braided sleeve;
• and the auxiliary positioning fiber and the continuous fiber core material are arranged in parallel or intertwined.