Vascular channel manufacture by deflagration

Patent metadata

Field	Value
Publication number	US-10744682-B2
Application number	US-201715829051-A
Country	US
Kind code	B2
Filing date	Dec 1, 2017
Priority date	Dec 1, 2017
Publication date	Aug 18, 2020
Grant date	Aug 18, 2020

Abstract

A method of forming channels within a substrate includes: (a) molding a sacrificial component directly into the substrate; (b) igniting the sacrificial component to cause a deflagration of the sacrificial component, thereby forming a channel in the substrate; and (c) cleaning the channel in the substrate to remove byproducts of the deflagration of the sacrificial component. The sacrificial component includes a combustible material with a protective shell, and the substrate includes a polymeric material.

First claim

What is claimed is:

1. A method of forming channels within a substrate, comprising:
molding a sacrificial component directly into the substrate;
igniting the sacrificial component to cause deflagration of the sacrificial component, thereby forming a channel in the substrate;
cleaning the channel in the substrate to remove byproducts of the deflagration of the sacrificial component;
wherein the molding of the sacrificial component directly into the substrate includes:
placing the sacrificial component in a mold;
pressurizing a polymeric resin;
shooting the polymeric resin into the mold; and
curing the polymeric resin.

2. The method of claim 1 , wherein molding the sacrificial component directly into the substrate occurs at a processing temperature, the sacrificial component includes a combustible material, the combustible material has a flash point, the processing temperature is less than the flash point of the combustible material, and the substrate includes a substrate material selected from a group consisting of a polymeric material, a reinforcing fiber, and a metal compound.

3. The method of claim 2 , wherein the combustible material is selected from a group consisting of black powder, pentaerythritol tetranitrate, combustible metals, combustible oxides, thermites, nitrocellulose, pyrocellulose, flash powders, and smokeless powder.

4. The method of claim 3 , wherein the sacrificial component includes a protective shell, and the protective shell includes a braided fibrous material.

5. The method of claim 4 , wherein the braided fibrous material is infused with an infusion material selected from a group consisting of a polymer, wax, oil, and a combination thereof.

6. The method of claim 5 , wherein the polymer is selected from a group consisting of polyimide, polytetrafluoroethylene (PTFE), high-density polyethylene (HDPE), polyphenylene sulfide (PPS), polyphthalamide (PPA), polyamides (PA), polypropylene, nitrocellulose, phenolic, polyester, epoxy, polylactic acid, bismaleimides, silicone, acrylonitrile butadiene styrene, polyethylene, polycarbonate, elastomers, polyurethane, polyvinylidene chloride (PVDC), polyvinyl chloride (PVC), polystyrene (PS), shellac resin, nitrocellulose lacquer, epoxy resin, alkyd, polyurethane, and a combination thereof.

7. The method of claim 1 , wherein the sacrificial component includes a protective shell, and the protective shell includes a polymer casing.

8. The method of claim 1 , further comprising forming the sacrificial component using an additive manufacturing process.

9. The method of claim 8 , wherein the additive manufacturing process is a 3D printing process.

10. The method of claim 9 , wherein the sacrificial component is configured as a network, and the network includes filaments intersecting each other.

11. The method of claim 10 , further comprising coating the sacrificial component with a coat, wherein sacrificial component includes a combustible material, the coat includes a coating material, the coating material has a first modulus of resilience, the combustible material has a second modulus of resilience, and the first modulus of resilience is greater than the second modulus of resilience.

12. The method of claim 11 , wherein coating the sacrificial component with the coat including dipping the sacrificial component in a container holding the coat.

13. The method of claim 12 , further comprising removing the sacrificial component from the container and thereafter curing the coat.

14. A method of forming channels within a substrate, comprising:
molding a sacrificial component directly into the substrate;
igniting the sacrificial component to cause deflagration of the sacrificial component, thereby forming a channel in the substrate;
cleaning the channel in the substrate to remove byproducts of the deflagration of the sacrificial component;

wherein the molding of the sacrificial component directly into the substrate includes:
placing the sacrificial component in a mold;
pouring a metallic material into the mold; and
cooling the metallic material to allow the metallic material to solidify.

15. A method of forming channels within a substrate, comprising:
3D printing a sacrificial component, wherein the sacrificial component includes a combustible material, and the combustible material has a flash point;
molding the sacrificial component with the substrate such that the sacrificial component is at least partially disposed inside the substrate, wherein the molding occurs at a processing temperature, and the processing temperature is less than the flash point;
igniting the sacrificial component to cause a deflagration of the sacrificial component, thereby forming a channel in the substrate; and
cleaning the channel in the substrate to remove byproducts of the deflagration of the sacrificial component; and
wherein cleaning the channel in the substrate includes introducing a liquid into the channel in the substrate to remove byproducts of the deflagration of the sacrificial component.

16. The method of claim 15 , wherein the molding of the sacrificial component with the substrate includes:
placing the sacrificial component in a mold;
pouring a metallic material into the mold; and
cooling the metallic material.

17. The method of claim 15 , wherein the molding of the sacrificial component with the substrate includes:
placing the sacrificial component in a mold;
pouring a polymeric resin into the mold; and
curing the polymeric resin.

18. The method of claim 15 , wherein cleaning the channel in the substrate includes shooting a gas into the channel in the substrate to remove byproducts of the deflagration of the sacrificial component.

Assignees

• Gm Global Tech Operations Llc

Inventors

• Ellison Nicole
• Coppola Anthony M

Classifications

• B33Y40/20 Primary

  Post-treatment, e.g. curing, coating or polishing · CPC title

• B29C33/448 Primary

  destructible (B29C33/52 takes precedence; in particular used in injection moulding B29C45/4457) · CPC title

• B33Y10/00

  Processes of additive manufacturing · CPC title

• B22D19/0072

  for making objects with integrated channels · CPC title

• B29C71/02

  Thermal after-treatment {(B29C71/0063 and B29C71/0072 take precedence)} · CPC title