an injection molding system includes a mold with a mold cavity , an injection device , and a temperature control device . the injection device is capable of injecting a molten material into the mold cavity . the temperature control device includes a heating system and a cooling system . the heating system utilizes hot fluid to increase a temperature of the mold to a predetermined upper temperature when the injection device starting to inject the material . the cooling system utilizes cool fluid to decrease the temperature of the mold to a predetermined low temperature when the material is being solidified in the mold cavity .