Ceramic die including a plurality of preferentially located fibers and associated method of constructing a ceramic die

Patent metadata

Field	Value
Publication number	US-9649681-B1
Application number	US-201615185752-A
Country	US
Kind code	B1
Filing date	Jun 17, 2016
Priority date	Jun 17, 2016
Publication date	May 16, 2017
Grant date	May 16, 2017

Abstract

A ceramic die for a hot press is provided, along with a method of constructing a ceramic die. The ceramic die includes a ceramic die body defining a mold surface configured to shape a part during a superplastic forming process. The mold surface defines at least one curved surface and at least one non-curved surface, spaced apart from the at least one curved surface. The ceramic die also includes a plurality of fibers disposed within the ceramic die body. The plurality of fibers may be preferentially located proximate the at least one curved surface such that a first portion of the ceramic die body proximate the at least one curved surface has a greater percentage of fibers than a second portion of the ceramic die body proximate the at least one non-curved surface.

First claim

That which is claimed:

1. A ceramic die comprising:
a ceramic die body defining a mold surface configured to shape a part during a superplastic forming process, wherein the mold surface defines at least one curved surface and at least one non-curved surface, spaced apart from the at least one curved surface; and
a plurality of fibers disposed within the ceramic die body, wherein the plurality of fibers are located proximate the at least one curved surface such that a first portion of the ceramic die body proximate the at least one curved surface has a greater percentage of fibers than a second portion of the ceramic die body proximate the at least one non-curved surface.

2. A ceramic die according to claim 1 wherein the plurality of fibers comprise a weave or tape of fibers located proximate the at least one curved surface.

3. A ceramic die according to claim 2 wherein the ceramic die body proximate the at least one non-curved surface is independent of the weave or tape of fibers.

4. A ceramic die according to claim 1 wherein the plurality of fibers extend about the at least one curved surface and terminate prior to extending across the at least one non-curved surface.

5. A ceramic die according to claim 1 wherein the plurality of fibers comprise ceramic fibers.

6. A ceramic die according to claim 1 wherein the plurality of fibers are also located proximate the mold surface such that a portion of the ceramic die body proximate the mold surface has a greater percentage of fibers than a portion of the ceramic die body spaced apart from the mold surface.

7. A ceramic die comprising:
a ceramic die body defining a mold surface configured to shape a part during a superplastic forming process; and
a plurality of fibers disposed within the ceramic die body, wherein the plurality of fibers are located proximate the mold surface such that a first portion of the ceramic die body proximate the mold surface has a greater percentage of fibers than a second portion of the ceramic die body spaced apart from the mold surface.

8. A ceramic die according to claim 7 wherein the plurality of fibers comprise a weave or tape of fibers located proximate the mold surface.

9. A ceramic die according to claim 8 wherein the second portion of the ceramic die body spaced apart from the surface is independent of the weave or tape of fibers.

10. A ceramic die according to claim 7 wherein the plurality of fibers comprise ceramic fibers.

11. A ceramic die according to claim 7 wherein the mold surface defines at least one curved surface and at least one non-curved surface, spaced apart from the at least one curved surface, and wherein the plurality of fibers are also located proximate the at least one curved surface such that a portion of the ceramic die body proximate the at least one curved surface has a greater percentage of fibers than another portion of the ceramic die body proximate the at least one non-curved surface.

12. A ceramic die according to claim 11 wherein the plurality of fibers extend about the at least one curved surface and terminate prior to extending across the at least one non-curved surface.

13. A method of constructing a ceramic die, the method comprising:
applying a layer of ceramic material to define a mold surface of a ceramic die body;
applying a plurality of fibers to at least portions of the layer of ceramic material; and
applying additional ceramic material over the plurality of fibers,
wherein the additional ceramic material forms a greater extent of the ceramic die body than the layer of ceramic material such that the fibers are located proximate the mold surface since that a first portion of the ceramic die body proximate the mold surface has a greater percentage of fibers than a second portion of the ceramic die body spaced apart from the mold surface.

14. A method of constructing a ceramic die according to claim 13 wherein applying the plurality of fibers comprises applying a weave or tape of fibers to at least portions of the layer of ceramic material.

15. A method of constructing a ceramic die according to claim 14 wherein the second portion of the ceramic die body spaced apart from the surface is independent of the weave or tape of fibers.

16. A method of constructing a ceramic die according to claim 13 wherein the plurality of fibers comprise ceramic fibers.

17. A method of constructing a ceramic die according to claim 13 wherein the mold surface defines at least one curved surface and at least one non-curved surface, spaced apart from the at least one curved surface, and wherein applying the plurality of fibers comprises applying the plurality of fibers so as to also be located proximate the at least one curved surface such that a portion of the ceramic die body proximate the at least one curved surface has a greater percentage of fibers than another portion of the ceramic die body proximate the at least one non-curved surface.

18. A method of constructing a ceramic die according to claim 17 wherein applying the plurality of fibers comprises extending the plurality of fibers about the at least one curved surface so as to terminate prior to extending across the at least one non-curved surface.

19. A method of constructing a ceramic die according to claim 17 wherein applying the plurality of fibers comprises applying the plurality of fibers such that the ceramic die body proximate the at least one non-curved surface is independent of the weave or tape of fibers.

Assignees

• Boeing Co

Inventors

• Sievers Daniel E
• Heck David P

Classifications

• B28B23/0006

  the reinforcement consisting of aligned, non-metal reinforcing elements · CPC title

• B21D22/022

  by heating the blank or stamping associated with heat treatment (C21D takes precedence) · CPC title

• B21C25/025

  Selection of materials therefor · CPC title

• B21D37/20

  Making tools by operations not covered by a single other subclass · CPC title

• B21D26/031

  Mould construction (B21D26/025 - B21D26/029 take precedence) · CPC title