The Influence of Furfuryl Resin Type-Classical and Designed for Sand 3D Printing-On Cast Iron Casting Microstructure...

Area of Science:

• Materials Science
• Foundry Technology
• Additive Manufacturing

Background:

• Resin-based binders, particularly furfuryl resin, are crucial for foundry molding and core sands.
• Self-curing furfuryl resin sand is widely used for complex and large castings, especially in small-batch production.
• Additive manufacturing (3D printing) is increasingly applied for sand-casting molds and cores, particularly for non-ferrous alloys.

Purpose of the Study:

• To investigate the impact of different furfuryl resin types (classical vs. 3D printing specific) on cast iron casting properties.
• To analyze gas emissions from molding sands and correlate them with casting surface roughness.
• To evaluate the suitability of 3D printing technology for producing sand molds with enhanced environmental characteristics.

Main Methods:

• Comparison of classical furfuryl resin with a novel resin designed for 3D printing of sand molds.
• Utilizing MAGMA software to determine optimal pouring parameters for casting simulations.
• Microscopic examination of casting surfaces and assessment of sample roughness.
• Testing and analysis of gas emissions from molding sands bonded with both resin types.

Main Results:

• Molding sand formulated with furfuryl resin specifically designed for 3D printing exhibited lower gas emissions.
• The study established a link between gas emissions from molding sands and the surface roughness of the resulting castings.
• Microscopic observations and roughness assessments provided insights into the quality of castings produced in both classical and 3D-printed molds.

Conclusions:

• Furfuryl resin tailored for 3D printing offers environmental advantages due to reduced gas emissions in foundry applications.
• The choice of furfuryl resin type directly influences gas emission levels and casting surface quality.
• This research supports the advancement of sustainable additive manufacturing techniques in the foundry industry.