Ceramic component casting

Patent metadata

Field	Value
Publication number	US-10328605-B2
Application number	US-201414172375-A
Country	US
Kind code	B2
Filing date	Feb 4, 2014
Priority date	Feb 4, 2014
Publication date	Jun 25, 2019
Grant date	Jun 25, 2019

Abstract

Methods for improved ceramics component casting. One such method may include vacuuming a ceramic-based slurry mixture and/or vacuuming a component mold. The vacuuming of the ceramic-based slurry mixture and the component mold may be to remove air bubbles from the respective elements. More specifically, the vacuuming may remove air bubbles from the ceramic-based slurry mixture and from a cavity of the component mold, respectively. The method may also include disposing the ceramic-based slurry mixture into the cavity of the component mold, and continuously vacuuming the cavity of the component mold including the ceramic-based slurry mixture for a predetermined time to remove any additional air bubbles included in the ceramic-based slurry mixture. Finally, the method may include forming a ceramic component within the continuously vacuumed cavity of the component mold over the duration of the predetermined time. The ceramic component formed from the ceramic-based slurry mixture.

First claim

We claim:

1. A method comprising:
vacuuming a ceramic-based slurry mixture to remove air bubbles from the ceramic-based slurry mixture;
establishing a vacuum state in a component mold to remove air bubbles from a cavity of the component mold;
introducing the ceramic-based slurry mixture into the component mold while maintaining the vacuum state; and
forming a ceramic component within the cavity of the component mold from the ceramic-based slurry mixture while maintaining the vacuum state for a period of time.

2. The method of claim 1 , further comprising providing vibrations to the ceramic-based slurry mixture prior to the introducing of the ceramic-based slurry mixture.

3. The method of claim 2 , further comprising providing the vibrations to the ceramic-based slurry mixture subsequent to the introducing of the ceramic-based slurry mixture into the cavity of the component mold.

4. The method of claim 3 , wherein the provided vibrations include at least one of a physical vibration, an ultrasonic vibration, or a rotary vibration.

5. The method of claim 1 , wherein the forming of the ceramic component includes forming a zirconia component.

6. The method of claim 1 , wherein the introducing the ceramic-based slurry mixture further includes supplying a predetermined amount of the ceramic-based slurry mixture to the cavity of the component mold via a supply tank.

7. The method of claim 1 , wherein the vacuuming of the component mold removes air bubbles from the ceramic-based slurry mixture as the ceramic-based slurry mixture fills the cavity of the component mold.

8. The method of claim 1 , wherein the forming of the ceramic component within the cavity of the component mold comprises:
reasonably maintaining an ambient temperature surrounding the component mold including the ceramic-based slurry mixture; and
reasonably maintaining a minimal compression force within the component mold including the ceramic-based slurry mixture.

9. The method of claim 1 , wherein the cavity of the component mold is filled from a bottom portion of the cavity to a top portion of the cavity.

10. The method of claim 1 , wherein:
the component mold defines a non-horizontal sidewall adjacent to an opening and configured to direct air bubbles toward the opening, wherein the non-horizontal sidewall is a first non-horizontal sidewall positioned on a first side of the opening; and
the component mold further defines a second non-horizontal sidewall positioned on a second side of the opening.

11. A method comprising:
vacuuming a chamber containing a ceramic-based slurry mixture to remove air bubbles from the ceramic-based slurry mixture;
while vacuuming the chamber, vacuuming a cavity of a component mold and introducing the ceramic-based slurry mixture into the cavity through a supply conduit fluidly coupling the chamber to an opening in a bottom portion of the cavity, such that the ceramic-based slurry mixture fills the cavity from the bottom portion to a top portion of the cavity;
continuing to vacuum the cavity including the ceramic-based slurry mixture for a predetermined time; and
forming a ceramic component within the cavity of the component mold over a duration of the predetermined time including curing the ceramic-based slurry mixture by chemically reacting a first material and a second material in the ceramic-based slurry mixture.

12. The method of claim 11 , wherein:
a first material comprises an epoxy material;
a second material comprises an epoxy hardener; and
at least one of the first material and the second material includes a plurality of zirconia particles.

13. The method of claim 12 , wherein the zirconia particles are suspended within at least one of the first material and the second material and are distributed evenly throughout the respective first material and the second material.

14. The method of claim 12 , wherein the introducing of the ceramic-based slurry mixture into the cavity of the component mold includes providing a combination of the first material and the second material into the cavity of the component mold.

15. The method of claim 11 , wherein the cavity of the component mold is angularly oriented.

16. The method of claim 11 , wherein the introducing of the ceramic-based slurry mixture into the cavity of the component mold includes forming a single air bubble only in a top portion of the cavity.

17. The method of claim 11 , wherein the cavity of the component mold includes a coating.

Assignees

• Apple Inc

Inventors

• Weber Douglas
• Matsuyuki Naoto

Classifications

• B28B17/026 Primary

  Conditioning ceramic materials · CPC title

• B28B13/02

  Feeding the unshaped material to moulds or apparatus for producing shaped articles · CPC title

• C04B2235/6027

  Slip casting · CPC title

• B28B13/0275

  Feeding a slurry or a ceramic slip · CPC title

• B28B7/44

  for treating with gases or degassing, e.g. for de-aerating {(treating with hot gases or vapour B28B7/42)} · CPC title