High performance, rapid thermal/UV curing epoxy resin for additive manufacturing of short and continuous carbon fiber epoxy composites

Patent metadata

Field	Value
Publication number	US-10994472-B2
Application number	US-201815948071-A
Country	US
Kind code	B2
Filing date	Apr 9, 2018
Priority date	Jul 17, 2015
Publication date	May 4, 2021
Grant date	May 4, 2021

Abstract

An additive manufacturing resin system includes a container; a build platform in the container; a build platform drive; an additive manufacturing resin that forms an additive manufacturing resin bath; an additive manufacturing print head; a build material supply connected to the additive manufacturing print head; an infill resin in the container, wherein the infill resin is supported by the additive manufacturing resin bath; a computer controller; and an extruded material that forms the product, wherein the infill resin at least partially surrounds the extruded material that forms the product. An infill resin supply provides the infill resin into the container and a control valve is connected to the infill resin supply. An IR light sensor is connected to the control valve and operatively connected to the infill resin in the container.

First claim

The invention claimed is:

1. An additive manufacturing method for producing a product, comprising the steps of:
providing a container;
providing a build platform in said container;
providing a build platform drive;
providing an infill resin bath within said container, wherein said infill resin bath is comprised of an infill resin;
providing a tailored resin having a resin mass, wherein said tailored resin includes an epoxy component, a filler component, a catalyst component, and a chain extender component, wherein the epoxy component is 70-95% of said resin mass, wherein the filler component is 1-20% of said resin mass, wherein the catalyst component is 0.1-10% of said resin mass, and wherein the chain extender component is 0-50% of said resin mass;
providing an additive manufacturing print head;
providing a build material supply connected to said additive manufacturing print head, wherein said build material supply delivers a build material comprised of said tailored resin and short carbon fibers, wherein said short carbon fibers are made of pure carbon and have a length in the range of 1 micron to 100 millimeters, wherein said additive manufacturing print head produces a fiber extruded material made of said short carbon fibers and said tailored resin;
providing an infill resin supply containing said infill resin, wherein said infill resin supply is located outside of said container;
providing lines and a control valve that directs said infill resin from said infill resin supply into said container to form said infill resin bath;
using said additive manufacturing print head to deposit said fiber extruded material onto said build platform;
providing a system with an infrared light sensor operatively connected to said control valve and operatively connected to said infill resin bath in said container, wherein said fiber extruded material is surrounded and supported by said infill resin in said infill resin bath, and wherein said infrared light sensor detects said infill resin bath and activates said control valve to direct said infill resin from said infill resin supply into said container;
providing a computer controller; and
using said additive manufacturing print head, said infill resin, said computer controller, and said fiber extruded material to form the product such that said infill resin bath at least partially surrounds and supports said fiber extruded material.

2. An additive manufacturing method for producing a product, comprising the steps of:
providing a container;
providing a build platform in said container;
providing a build platform drive;
providing an infill resin bath within said container, wherein said infill resin bath is comprised of an infill resin;
providing an a tailored resin having a resin mass, wherein said tailored resin includes an epoxy component, a filler component, a catalyst component, and a chain extender component;
wherein the epoxy component is 70-95% of said resin mass, wherein the filler component is 1-20% of said resin mass, wherein the catalyst component is 0.1-10% of said resin mass, and wherein the chain extender component is 0-50% of said resin mass;
providing a print head, wherein said print head has axes and wherein said print head has freedom of movement along said axes;
providing a build material supply connected to said print head, wherein said build material supply delivers a build material to said print head, wherein said build material comprises said tailored resin and at least one fiber, wherein said print head extrudes a fiber epoxy composite made of said build material;
providing an infill resin supply, wherein said infill resin supply is located outside of said container;
providing lines and a control valve that directs said infill resin from said infill resin supply into said container;
using said print head to deposit said fiber epoxy composite onto said build platform creating a build level to form the product;
providing a system with an infrared light sensor operatively connected to said control valve and operatively connected to said infill resin bath, wherein said deposited fiber epoxy composite is surrounded and supported by said infill resin in said infill resin bath, and wherein said infrared light sensor detects said build level and activates said control valve to direct said infill resin from said infill resin supply into said container;
providing a computer controller; and
using said print head, said infill resin, said build platform, said computer controller, and said fiber epoxy composite to form the product, wherein said infill resin at least partially surrounds and supports said fiber epoxy composite that forms the product.

Assignees

• L Livermore Nat Security Llc

Inventors

• Lewicki James

Classifications

• B33Y40/10

  Pre-treatment · CPC title

• B33Y40/00

  Auxiliary operations or equipment, e.g. for material handling · CPC title

• B29C64/321

  Feeding · CPC title

• B29C64/209

  Heads; Nozzles · CPC title

• B33Y50/02

  for controlling or regulating additive manufacturing processes · CPC title