There are different parts of theprocess. The historical names of parts, and are presented here for completeness and can be found in the appendix for future reference. Typical models, often called two-part flasks, used in sand casting and upper and lower halves are significantly different parts in metal or wooden frame solutions process.A called the flask is made up of upper halves and bottoms, called the handle and drag. The flask on the sand and provides support when the molten metal is poured into the mold.
The upper half, the fight is, the upper part of a pattern which is the duplicate of the real part called the model, as well as riser and sprue. The model used for stock (and other parts) are often made of wood and / or metal to keep external elements and the shape. Risers introducing create void in the mold create overflow area for the molten metal. Risers are an important element in sand casting, so that the molten material shrink as it cools and solidifies. It also helps in eliminating and at times voids prevention in most solutions.
Open sprue is attached to the external pouring cup and extends down to the gating system, to near the separation surface, which directs the flow of molten metal into the pattern and riser. The line separating the surface that separates the top and the bottom half of the mold. At first the drag is partially filled with sand and a pattern is formed carefully packing sand around the mold. Cores are placed inside of the mold if there is a need to help internal features such as holes and / or maintain internal passages. The gating system and put together then near the separation line. Next, the tackle, the models for the sprue and riser, are assembled to the drag and sand poured on the half tackle, covering the pattern, heart, and the system gating leaving the sprue and riser partially visible. The sand is compacted carefully by hand, vibration or small hammer.