Three dimensional molding device

Abstract

The three dimensional molding device includes a plasticization section that has a screw and that generates a plasticized material, a nozzle that has nozzle opening and that ejects the plasticized material, an ejection rate adjustment mechanism that communicates with the nozzle opening, the ejection rate adjustment mechanism controlling the ejection rate of the plasticized material from the nozzle opening by adjusting an opening degree of a flow path, and a control section, wherein the control section executes at least one of a first control for changing the rotation speed of the screw in multi-stages during an ejection stopped period, which is a period after ejection of the plasticized material from the nozzle opening is stopped and before ejection of the plasticized material from the nozzle opening is resumed, and a second control for changing the rotation speed of the screw in multi-stages during a resume ejection period, which is a period after ejection of the plasticized material from the nozzle opening is resumed and before the opening degree of the flow path reaches an opening degree designated for the ejection rate adjustment mechanism and in the second control, the control section decreases and then increases the rotation speed of the screw.