System and method for producing multi-material hybrids with a foam structure

Patent metadata

Field	Value
Publication number	US-11745399-B2
Application number	US-202017064816-A
Country	US
Kind code	B2
Filing date	Oct 7, 2020
Priority date	Oct 8, 2019
Publication date	Sep 5, 2023
Grant date	Sep 5, 2023

Abstract

This system and method provide for manufacturing a multi-material hybrid structure comprising a single- or multi-layer sheet or tube, which are made of metals, fabrics, polymer and their combinations, and at least one layer or body made of formed resin. The methods include a simultaneous forming-injection process that followed with an additional sequence to initiate the forming process along with curing and/or solidification and/or bonding processes. The additional sequence provides a pressure drop inside the cavity using tool movement and or additional deformation of one/or several layers of the sheet using any fluid pressure, suction and/or electromagnetic force. The injection process can be used for any kind of synthetic or bio-based resin with or without fiber reinforcement. It is also integrated with supercritical assisted technology.

First claim

What is claimed is:

1. A method of forming an article of manufacture comprising the steps of:
providing a blank;
securing the blank in a fixed position;
reforming a shape of the blank by injecting a resin under pressure against a first side of the blank to reform the blank by pressure of the resin against the blank;
providing a resistance pressure at the blank to counter pressure against the first side of the blank and control shape reformation of the blank;
whereby the blank is formed into an article of manufacture comprising a foamed material; and,
wherein the resistance pressure at the blank to control reformation of the blank is provided by applying a fluid pressure against a side of the blank that is opposite the side of the blank against which the resin is injected under pressure.

2. The method of forming an article of manufacture of claim 1 , further comprising the step of controlling injection pressure of the resin relative to the resistance pressure at the blank to control shape reformation of the blank.

3. The method of forming an article of manufacture of claim 1 , further comprising the step of reducing pressure of the resin to induce formation of the resin as a foam material.

4. The method of forming an article of manufacture of claim 1 , wherein the resin comprises supercritical fluid.

5. The method of forming an article of manufacture of claim 1 , wherein injection of the resin under pressure forces a portion of the blank into a portion of a cavity of a mold.

6. The method of forming an article of manufacture of claim 1 , wherein resistance pressure at the blank to control reformation of the blank is provided by the blank.

7. The method of forming an article of manufacture of claim 1 , wherein resistance pressure at the blank to control reformation of the blank is provided by applying fluid pressure using a fluid against a side of the blank that is opposite the side of the blank against which the resin is injected under pressure, wherein the fluid is a liquid.

8. The method of forming an article of manufacture of claim 1 , wherein resistance pressure at the blank to control reformation of the blank is provided by applying fluid pressure using a fluid against a side of the blank that is opposite the side of the blank against which the resin is injected under pressure, wherein the fluid is a gas.

9. The method of forming an article of manufacture of claim 1 , wherein resistance pressure at the blank to control reformation of the blank is provided by applying hydraulic pressure against a side of the blank that is opposite the side of the blank against which the resin is injected under pressure.

10. The method of forming an article of manufacture of claim 1 , wherein resistance pressure at the blank to control reformation of the blank is provided by applying mechanical pressure against a side of the blank that is opposite the side of the blank against which the resin is injected under pressure.

11. The method of forming an article of manufacture of claim 1 , wherein resistance pressure at the blank to control reformation of the blank is provided by applying an electromagnetic field.

12. A method of forming an article of manufacture comprising
providing a blank;
securing the blank in a fixed position;
reforming a shape of the blank by injecting a resin under pressure against a first side of the blank to reform the blank by pressure of the resin against the blank;
providing a resistance pressure at the blank to counter pressure against the first side of the blank and control shape reformation of the blank; and,
whereby the blank is formed into an article of manufacture comprising a foamed material; and,
wherein the resistance pressure at the blank to control reformation of the blank is provided by introducing a fluid pressure into a cavity of a mold, wherein the fluid pressure acts against a side of the blank that is opposite the first side of the blank against which the resin is injected under pressure.

13. A method of forming an article of manufacture comprising:
providing a blank;
securing the blank in a fixed position;
reforming a shape of the blank by injecting a resin under pressure against a first side of the blank to reform the blank by pressure of the resin against the blank;
providing a resistance pressure at the blank to counter pressure against the first side of the blank and control shape reformation of the blank; and,
whereby the blank is formed into an article of manufacture comprising a foamed material; and,
wherein the resistance pressure at the blank to control reformation of the blank is provided by the blank, and the blank is formed of metal.

14. The method of forming an article of manufacture of claim 1 , wherein the blank is held in fixed position between a first plate and a second plate, wherein the second plate comprises a cavity formed therein, and wherein injection of the resin under pressure forces a portion of the blank into a portion of the cavity.

15. The method of forming an article of manufacture of claim 1 , the step of inducing negative pressure to the resin to initiate foaming of the resin.

16. The method of forming an article of manufacture of claim 1 , wherein the resin foams to form a foam material, and wherein the resin expands as the foam material forms, and the foam material binds to the article of manufacture.

Assignees

• Univ Clemson

Inventors

• Pilla Srikanth
• Farahani Saeed

Classifications

• B29C44/58 Primary

  Moulds · CPC title

• B29C44/1271

  the preformed parts being partially covered · CPC title

• B29K2105/04

  cellular or porous · CPC title

• B29K2705/00

  Use of metals, their alloys or their compounds, for preformed parts, e.g. for inserts · CPC title

• B29C44/16 Primary

  shaped by the expansion of the material · CPC title