Additively manufactured casting core-shell mold with integrated filter and ceramic shell

Patent metadata

Field	Value
Publication number	US-10974312-B2
Application number	US-201715636366-A
Country	US
Kind code	B2
Filing date	Jun 28, 2017
Priority date	Jun 28, 2017
Publication date	Apr 13, 2021
Grant date	Apr 13, 2021

Abstract

A method of forming a cast component and a method of forming a casting mold is provided. The method is performed by connecting at least one wax gate component to a ceramic core-shell mold. The ceramic core-shell mold includes at least a filter, a first core portion, a first shell portion, and at least one first cavity between the core portion and the first shell portion. The ceramic core-shell mold may be manufactured using an additive manufacturing process and may include an integrated ceramic filter. At least a portion of the ceramic core-shell mold and the wax gate component is coated with a second ceramic material. The wax gate component is then removed to form a second cavity in fluid communication with the first cavity.

First claim

What is claimed is:

1. A ceramic casting mold comprising:
a ceramic filter, a ceramic core portion, a first ceramic shell portion, and a second ceramic shell portion at least partially covering the first ceramic shell portion, the first ceramic shell portion and the second ceramic shell portion being joined by engagement portions, wherein the ceramic casting mold further comprises:
at least one cavity between the ceramic core portion and the first ceramic shell portion, the at least one cavity adapted to define a shape of a cast component upon casting and removal of the ceramic casting mold,

wherein the ceramic casting mold further comprises a plurality of filaments joining the ceramic core portion and the first ceramic shell portion, and
wherein each of the plurality of filaments spans between the ceramic core and first ceramic shell portion, the plurality of filaments adapted to define a plurality of holes providing fluid communication between a cavity within the cast component defined by the ceramic core portion and an outer surface of the cast component upon removal of the ceramic casting mold.

2. The ceramic casting mold of claim 1 , wherein a second ceramic material is added to the first ceramic shell portion and a wax gate component connected to the first ceramic shell portion by dipping the first ceramic shell portion and wax component into a slurry.

3. The ceramic casting mold of claim 2 , wherein the first ceramic shell portion is formed of a first ceramic material having a different solubility, heat transfer coefficient, or porosity than the second ceramic material.

4. The ceramic casting mold of claim 1 , wherein the ceramic filter is located between a first opening between the first ceramic shell portion and the ceramic core portion and a second opening between the first ceramic shell portion and the ceramic core portion and is in fluid communication with the first opening and the second opening.

5. The ceramic casting mold of claim 1 , wherein the ceramic filter includes openings, wherein the openings include at least 60% to at least 90% of the total volume of the ceramic filter.

Assignees

• Gen Electric

Inventors

• Yang Xi
• Cole Michael
• Brown Michael
• Garay Gregory Terrence
• Pang Tingfan
• Przeslawski Brian David
• Konitzer Douglas Gerard

Classifications

• C04B2235/6028

  Shaping around a core which is removed later · CPC title

• C04B35/622

  Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products · CPC title

• B28B7/346

  Manufacture of moulds · CPC title

• C04B2235/6026

  Computer aided shaping, e.g. rapid prototyping · CPC title

• B22C9/24 Primary

  for hollow articles · CPC title