Continuous fiber reinforced composites and methods, apparatuses, and compositions for making the same
First Claim
1. A method of making a composite three-dimensional object comprising:
- (a) forming a continuous filament comprising a longitudinally extending continuous fiber and a material-laden composition comprising a thermoplastic polymer and at least about 40 volume % of a ceramic or metallic particulate, wherein the filament inclides a green matrix material from the material-laden composition, and wherein the green matrix material completely surrounds the fiber;
(b) passing the filament to a movable assembly for guiding placement of the filament onto an associated working surface;
(c) depositing the filament from the movable assembly without application of a compression force onto the working surface to form a lower filament layer having a predetermined filament orientation;
(d) depositing the filament from the movable assembly without application of a compression force onto the working surface to form an upper filament layer on top of the lower filament layer;
(e) heating the filament after it is deposited in the upper filament layer, a portion of the upper filament layer adjacent the deposited filament and a portion of the filament layer below and proximate to the deposited filament to a predetermined temperature effective for softening the green matrix material to provide a heated portion of deposited filament and filament layers;
(f) compressing the heated portion with a force effective for consolidating and bonding the green matrix material of the deposited filament and filament layers;
(g) solidifying the heated portion;
(h) repeating steps (d)-(g) one or more times as desired to provide a composite object comprising two or more filament layers and having a predetermined geometry.
4 Assignments
0 Petitions
Accused Products
Abstract
A process for continuous composite coextrusion comprising: (a) forming first a material-laden composition comprising a thermoplastic polymer and at least about 40 volume % of a ceramic or metallic particulate in a manner such that the composition has a substantially cylindrical geometry and thus can be used as a substantially cylindrical feed rod; (b) forming a hole down the symmetrical axis of the feed rod; (c) inserting the start of a continuous spool of ceramic fiber, metal fiber or carbon fiber through the hole in the feed rod; (d) extruding the feed rod and spool simultaneously to form a continuous filament consisting of a green matrix material completely surrounding a dense fiber reinforcement and said filament having an average diameter that is less than the average diameter of the feed rod; and (e) depositing the continuous filament into a desired architecture which preferably is determined from specific loading conditions of the desired object and CAD design of the object to provide a green fiber reinforced composite object.
120 Citations
13 Claims
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1. A method of making a composite three-dimensional object comprising:
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(a) forming a continuous filament comprising a longitudinally extending continuous fiber and a material-laden composition comprising a thermoplastic polymer and at least about 40 volume % of a ceramic or metallic particulate, wherein the filament inclides a green matrix material from the material-laden composition, and wherein the green matrix material completely surrounds the fiber;
(b) passing the filament to a movable assembly for guiding placement of the filament onto an associated working surface;
(c) depositing the filament from the movable assembly without application of a compression force onto the working surface to form a lower filament layer having a predetermined filament orientation;
(d) depositing the filament from the movable assembly without application of a compression force onto the working surface to form an upper filament layer on top of the lower filament layer;
(e) heating the filament after it is deposited in the upper filament layer, a portion of the upper filament layer adjacent the deposited filament and a portion of the filament layer below and proximate to the deposited filament to a predetermined temperature effective for softening the green matrix material to provide a heated portion of deposited filament and filament layers;
(f) compressing the heated portion with a force effective for consolidating and bonding the green matrix material of the deposited filament and filament layers;
(g) solidifying the heated portion;
(h) repeating steps (d)-(g) one or more times as desired to provide a composite object comprising two or more filament layers and having a predetermined geometry. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method of making a composite three-dimensional object comprising:
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(a) forming a feed rod having a longitudinal axis and having a hole extending down the longitudinal axis, the feed rod comprising a material-laden polymer composition comprising a thermoplastic polymer and at least about 40 volume % of a ceramic or metallic particulate;
(b) inserting an end of one or more fibers through the hole in the feed rod;
(c) extruding the feed rod and one or more fibers simultaneously to form a continuous filament that includes a green matrix material from the material-laden composition, the filament having an average diameter that is less than the average diameter of the feed rod and the green matrix material completely surrounding the fiber;
(d) passing the filament to a movable assembly for guiding placement of the filament onto an associated working surface;
(e) depositing the filament from the movable assembly without application of a compression force onto the working surface to form a lower filament layer having a predetermined filament orientation;
(f) depositing the filament from the movable assembly without application of a compression force onto the working surface to form an upper filament layer on top of the lower filament layer;
(g) heating the filament after it is deposited in the upper filament layer, a portion of the upper filament layer adjacent the deposited filament and a portion of the filament layer below and proximate to the deposited filament to a predetermined temperature effective for softening the green matrix material to provide a heated portion of deposited filament and filament layers;
(h) compressing the heated portion with a force effective for consolidating and bonding the green matrix material of the deposited filament and filament layers;
(i) solidifying the heated portion;
(j) repeating steps (f)-(i) one or more times as desired to provide a composite object comprising two or more filament layers and having a predetermined geometry.
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Specification