Fabrication of integral ceramic mold for investment casting of hollow turbine blade based on stereolithography

In this study, a novel structure design method based on knowledge template was prompted. The notion and construction methods of knowledge template were introduced. Moreover, the knowledge template based design process was represented. The knowledge templates of investment casting die bases of turbine blade were established and a design system for die base was developed. The system provides designers with a semi-automated approach for the die base design. Finally, several sample applications for investment casting die base of turbine blade were presented for demonstration.

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FEA optimization of injection parameters in ceramic core development for investment casting of a gas turbine blade

Materials Today Proceedings ◽

10.1016/j.matpr.2020.02.477 ◽

2020 ◽

Vol 26 ◽

pp. 2190-2199

Author(s):

Alok Singh Chauhan ◽

Boddapati Anirudh ◽

A. Satyanarayana ◽

Pradyumna Rallapalli

Keyword(s):

Gas Turbine ◽

Turbine Blade ◽

Investment Casting ◽

Gas Turbine Blade ◽

Ceramic Core ◽

Injection Parameters

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Collapsibility Studies of MJM Acrylate Patterns for Investment Casting

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.330.839 ◽

2013 ◽

Vol 330 ◽

pp. 839-842

Author(s):

O.M.F. Marwah ◽

S. Sharif ◽

M. Ibrahim ◽

M.H. Idris

Keyword(s):

Investment Casting ◽

Cost Reduction ◽

Lead Time ◽

Casting Process ◽

Ash Content ◽

Ceramic Mold ◽

Significant Cost ◽

Volume Production ◽

Materials Used ◽

Significant Cost Reduction

Direct rapid investment casting (IC) is among the favorable and economical casting process due to its flexibility in fabricating any geometrical part features within a shorter lead time. Polymer based materials used in rapid prototyping (RP) technologies are exhibiting significant cost reduction for low volume production and are potentially replacing conventional wax materials as sacrificial patterns in IC process. This paper reports on the collapsibility characteristics of acrylate patterns during the burnout process for IC molds. The acrylate based patterns were fabricated by a Multijet Modelling (MJM) process with hollow internal structure. The MJM patterns were then Slurry procedure were introduced for producing toughest ceramic mould to prevent cracking occurrence. Results showed that the acrylate patterns start to decomposed gradually from the ceramic mold at 350°C and at 600°C, a total clean burnout without any residues and ash content was attained. This study shows that acrylate patterns built from RP technologies are suitable for fabricating ceramic molds and are highly potential in substituting conventional wax for IC process.

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Fabrication of Integral Core/Shell Ceramic Casting Mould for Hollow Turbine Blade

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.248.231 ◽

2012 ◽

Vol 248 ◽

pp. 231-236 ◽

Cited By ~ 2

Author(s):

Hai Hua Wu ◽

Di Chen Li ◽

Yi Ping Tang

Keyword(s):

Turbine Blade ◽

Turbine Blades ◽

Core Shell ◽

Green Body ◽

Positional Accuracy ◽

Ceramic Slurry ◽

Rapid Fabrication ◽

Hollow Turbine Blade ◽

Ceramic Casting

The paper presents an integral core/shell fabrication of ceramic casting mould for hollow turbine blades by combining SL (Stereolithography) with gelcasting. This method could guarantee the positional accuracy between ceramic cores and shell, thus achieving the rapid fabrication of complex turbine blade castings. The paper focuses on the design of resin mould for gelcasting, the preparation of ceramic slurry, the pyrolysis of resin prototype and the sintering of ceramic green body. The feasibility and effectiveness of above mentioned method were verified through successful manufacturing of hollow turbine blades with double-walled structure.

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