input: [Foundry Process] Green Sand Molding [Process] The green sand process utilizes a mold made of compressed or compacted moist sand packed around a wood or metal pattern. A metalframe or flask is placed over the pattern to produce a cavity representing one half of the casting. The sand is compacted by either jolting or squeezing the mold. The other half of the mold is produced in like manner and the two flasks are positioned together to form the complete mold. If the casting has hollow sections, cores consisting of hardened sand (baked or chemically hardened) are used. High-Density Molding (High Squeeze Pressure / Impact) Large air cylinders, hydraulic, and innovative explosive methods have improved the sand compaction around the pattern, improving the standards of accuracy and finish which can be achieved with certain types of castings. [Pros / Cons] 
output: Advantages Most ferrous / non-ferrous metals can be used. Low Pattern & Material costs. Almost no limit on size, shape or weight of part. Adaptable to large or small quantities Used best for light, bench molding for medium-sized castings or for use with production molding machines. Disadvantages Low design complexity. Lower dimensional accuracy.