Explanation Of Expanded Foam Molding Process; Advantages And Disadvantages
Sand casting is one of the most used metal production processes. They are very important and they constitute a very big market around the world. As it implies with its name, sand is used in mold making. These sands are very special sands and they need to have some properties to obtain good casting operations. In here, we will explain;
As you know that, sand is obtained from silica, and mold sands are generally mixed with other minerals. So, in general what makes mold sand is special is, the ingridients.
In general, a mold sand includes around 90% of typical sand, 7% of clay which binds the sand to obtain mold shape and 3% of water for shaping purposes. Clay is very important ingridient to obtain sand mold. After the shaping of mold sand, solidification of clay binds the sand grains to obtain solid mold structure.
Sometimes, other phenolic resins can be used instead of clay. Thermosets solidifies with the application of light, from which we can obtain solid mold structures with this nature.
After mixing up the constituents of mold sands, the shaping of this mixtur before solidification is very important. Before shaping of mold sand, general system to obtain mold must be built. In this system, there are parts of system;
‘Packing’ of sand inside the flask is an also very important process. Sand must be packed inside the flask to obtain a solid mold structure. There are some mechanisms to pack the sand inside flask.
Mold sands and molds that are created from sands must have some properties to meet with the situations originated from metal casting.
In general, there are three types of conventional sand molds that are used in sand casting operations.
All the explanations about conventional sand molds can be explained like above. Do not forget to leave your comments and questions about sand molds below.
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