Plastic is a polymer material that can be molded into any desired shape by applying heat and pressure to it. It can be generally classified into plastic that has thermal plasticity and becomes malleable when heated, and thermoset plastic that hardens when heated. Because the former type becomes soft when heated, it is easy to process. It then hardens when it cools. Injection molding is a type of molding that takes advantage of this characteristic. Plastic that has been melted at high temperatures is injected into a mold and cooled to form the molded product. Probably two-thirds of today's molded products are made using this method. The dedicated robots that take the plastic out of the mold are called take-out robots. Nowadays, many injection molding machines are equipped with take-out robots. These robots not only take the molded products out of the mold, but also transfer them to subsequent processes and stock them in containers or cardboard boxes for shipping. Take-out robots are gradually being adapted to handle an increasingly broad range of functions.