yvonne@nydcasting.com 
No bake resin sand casting
No-Bake Resin Sand Casting
No-bake resin sand casting, also known as self-hardening sand casting, is a metal casting process that uses chemically bonded sand to create molds. Unlike traditional green sand casting, no-bake sand molds harden at room temperature without the need for heat or pressure. The process is versatile and suitable for producing high-quality castings with excellent dimensional accuracy, strength, and surface finish.
Key Features of No-Bake Resin Sand Casting
- Chemical Bonding: Resin and a hardener are mixed with sand to form strong and durable molds.
- High Precision: Achieves excellent dimensional accuracy and is ideal for intricate or large-scale components.
- Excellent Surface Finish: Produces smoother surfaces compared to green sand casting.
- Versatile: Suitable for ferrous and non-ferrous metals, including iron, steel, aluminum, and copper alloys.
- No Heat Required: Molds cure at ambient temperature, reducing energy consumption.
The No-Bake Resin Sand Casting Process
- Pattern Preparation:
- A pattern of the desired part is prepared using materials such as wood, metal, or plastic.
- Sand Mixing:
- Sand is mixed with a resin binder and hardener to create a chemically bonded mixture.
- Mold Formation:
- The sand mixture is packed around the pattern in a mold box. It cures and hardens at room temperature, forming a solid mold.
- Core Placement (if needed):
- For parts requiring internal cavities, sand cores are inserted into the mold.
- Mold Assembly:
- The mold halves are joined together to create the complete mold.
- Metal Pouring:
- Molten metal is poured into the mold cavity and allowed to cool and solidify.
- Shakeout and Cleaning:
- The mold is broken to remove the casting, and excess sand is cleaned off.
- Finishing:
- The casting is processed further through grinding, machining, or heat treatment to meet specifications.
