What are the three different types of metal molds?

The three different types of metal molds are injection molds, blow molds, and compression molds. Injection molds are used for creating complex shapes by injecting molten metal into a mold cavity. Blow molds are mainly used for hollow objects, where air is blown into a heated plastic to expand it into the mold. Compression molds involve placing a material in a heated mold cavity, where it is then compressed to form a specific shape, commonly used for thermosetting plastics.