Kermit A Buntrock

US Patent:

6991022, Jan 31, 2006

Filed:

Dec 30, 2003

Appl. No.:

10/750425

Inventors:

John Vandermeer - Newark DE, US
Kermit A. Buntrock - Williamsburg VA, US
Thomas M. Branscomb - Portland OR, US
Arlen G. Davis - Portland OR, US

Assignee:

Buntrock Industries, Inc - Williamsburg VA

International Classification:

B22C 1/00
B22C 9/04

US Classification:

164519, 164361

Abstract:

The invention relates to investment casting shell molds and their method of manufacture. The method entails mixing fiber such as ceramic refractory fiber and organic fiber with ceramic filler to form a dry blend. The dry blend is mixed with a binder sol such as colloidal silica sol to form slurry. An expendable preform is dipped into the slurry, stuccoed and dried. This step is repeated until a ceramic shell of a desired thickness is formed over the expendable preform. The expendable preform then is removed, and the green ceramic shell is fired. Molten metal then may be poured into the shell to form a metal casting.

US Patent:

7004230, Feb 28, 2006

Filed:

Jun 8, 2005

Appl. No.:

11/147473

Inventors:

John Vandermeer - Landenberg PA, US
Kermit A. Buntrock - Williamsburg VA, US
Thomas M. Branscomb - Portland OR, US
Arlen G. Davis - Portland OR, US

Assignee:

Buntrock Industries, Inc. - Williamsburg VA

International Classification:

B22C 1/00
B22C 9/04

US Classification:

164519, 164361

Abstract:

Incorporation of rice hull ash into investment casting shell molds improves the permeability, shell build thickness, and/or shell build uniformity of the molds. A method to make the molds entails mixing refractory filler, rice hull ash, and preferably a fiber to form a dry blend; mixing the dry blend with a binder sol to form a refractory slurry, and employing the refractory slurry to produce an investment casting shell mold.

US Patent:

7048034, May 23, 2006

Filed:

Mar 31, 2005

Appl. No.:

11/096114

Inventors:

John Vandermeer - Newark DE, US
Kermit A Buntrock - Williamsburg VA, US
Thomas M Branscomb - Portland OR, US
Arlen G Davis - Portland OR, US

Assignee:

Buntrock Industries, Inc. - Williamsburg VA

International Classification:

B22C 1/00
B22C 9/04

US Classification:

164519, 164361

Abstract:

The invention relates to a investment casting shell molds and their method of manufacture. The method entails mixing fiber and refractory filler to form a dry blend; mixing the dry blend with a binder sol to form a refractory slurry, and employing the refractory slurry to produce an investment casting shell mold.

US Patent:

49276735, May 22, 1990

Filed:

Jan 27, 1988

Appl. No.:

7/148940

Inventors:

Kermit A. Buntrock - Chicago IL
Daniel R. English - Felton CA
Wescomb R. Jones - Wilmington DE

Assignee:

Buntrock Industries, Inc. - Lively VA

International Classification:

B05D 302

US Classification:

4273762

Abstract:

A process for rapidly forming a laminar ceramic shell mold on a supporting structure comprising alternately, in either order, the steps of: (1) dipping the support structure into a bath comprising either an alkali stabilized solution of ionic silicate or an alkali stabilized solution of colloidal silica to define a first coating on the support structure; and (2) dipping the support structure into a bath comprising an acid stabilized solution of phosphate modified aluminum salt to define a second coating on the support structure. The coatings on the support structure react to form a gel set shell which can be fired to a ceramic material. The dipping step sequence is repeated to provide additional coatings which react to define additional layers of gel set shell. The rate of laminate thickness buildup can be increased by including fine particulate refractory in the coating baths and the coated surface can be contacted by dry, relatively coarse refractory to define a stucco layer between the dip coatings. The chemically induced gel set eliminates the need for air drying between coating applications thereby saving a major portion of the total process time.

US Patent:

50229206, Jun 11, 1991

Filed:

Jan 16, 1990

Appl. No.:

7/465422

Inventors:

Kermit A. Buntrock - Chicago IL
Daniel R. English - Felton CA
Wescomb R. Jones - Wilmington DE

Assignee:

Buntrock Industries, Inc. - Lively VA

International Classification:

B28B 734

US Classification:

106 383

Abstract:

A process for rapidly forming a laminar ceramic shell mold on a supporting structure comprising alternately, in either order, the steps of: (1) dipping the support structure into a bath comprising either an alkali stabilized solution of ionic silicate or an alkali stabilized solution of colloidal silica to define a first coating on the support structure; and (2) dipping the support structure into a bath comprising an acid stabilized solution of phosphate modified aluminum salt to define a second coating on the support structure. The coatings on the support structure react to form a gel set shell which can be fired to create a ceramic material. The dipping step sequence is repeated to provide additional coatings which react to define additional layers of gel set shell. The rate of laminate thickness buildup can be increased by including fine particulate refractory in the coating baths and the coated surface can be contacted by dry, relatively coarse refractory to define a stucco layer between the dip coatings. The chemically induced gel set eliminates the need for air drying between coating applications thereby saving a major portion of the total processing time.