How to choose the material of mold

In this lesson i will show how to choose the material of mold. As you know, injection mold mass production many so durability of the material is very improtant. If we choose material not good, we will lost many money for repair mold when mass production.

 When we choose the material we must following.

+Abrasion Resistance
Consider how long a mold will last or if parts will accurately maintain their dimensions depending on production quantity.
+Polishing
Consider how much a mold should be polished for the desired part finish.
+Machinability
Use a solid material that can process mold or parts good.
+Heat Treatability
Use a material that can be processed evenly by heat treatment.
+Durability
Use a material that is durable against pulling stress, compression stress, or bend stress during the molding process.
+Heat Conductivity
Use a material whose temperature can be easily controlled while cooling the mold.
+Delivery / Cost
Use a low cost material that is easy to get in the market as well as delivered securely and immediately.