Patent ID: 7172405

Claim:
A metal mold device for blow molding characterized in that: fluid flow grooves with a flat cross section are formed between a back surface of a metal mold which is used for blow molding and a back-up member which is disposed so as to adhere tightly to said back surface, said flat cross section being flattened along said back surface of said metal mold, said fluid flow grooves are provided in a plurality of numbers and are disposed so that said grooves are densely concentrated witH partition walls, which have a narrow width, interposed, and fluid inlet openings and outlet openings are formed in each of said fluid flow grooves, said fluid inlet openings being at one end thereof and said outlet openings being at another end thereof; wherein heating or cooling of said metal mold is accomplished by causing a heating fluid or cooling fluid to flow through each of said fluid flow grooves.