| 摘要 |
PROBLEM TO BE SOLVED: To provide a mold manufacturing device, a manufacturing method of a mold, and a jacket for the mold manufacturing device, which can change the position or the number of an injection path to a cavity easily and securely, even if the necessity of changing the position etc. of the injection path to the cavity based on the shape change of the cavity is generated, and moreover, can manufacture an even mold.SOLUTION: A mold manufacturing device includes a cavity in which coated sand can be charged, a forming die having an injection path and a discharging path communicated with this cavity, a coated sand supply means which supplies the coated sand to the cavity, and a gas supply means which supplies gas to the cavity through the injection path, wherein it is equipped with a jacket having a recessed portion opening in the contact surface side and a communicating path which supplies gas to the recessed portion from the gas supply means, the recessed portion being configured so as to be attachable to the forming die so as to cover the external opening of the injection path. |
