Material delivery device, three-dimensional shaping device, and injection molding device

A material delivery device, comprising:

• a plasticizing unit including a screw and configured to plasticize a material by rotation of the screw to produce a plasticized material;
• a nozzle through which the plasticized material is delivered to outside;
• a communication flow path provided between the screw and the nozzle and through which the plasticized material flows;
• a pressure detection unit including a first cylinder coupled to the communication flow path, a rod inserted into the first cylinder, and a pressure sensor disposed with the rod separated from the communication flow path, in which the rod has a first end surface facing the communication flow path and a second end surface opposite to the first end surface in a longitudinal direction of the rod, and configured to receive a pressure of the plasticized material in the communication flow path at the first end surface and transmit the pressure to the pressure sensor through the second end surface;
• and
• a rotation regulation mechanism having a first engaging portion provided on a side surface of the rod and a second engaging portion to be engaged with the first engaging portion, and configured to regulate rotation of the rod about a central axis along the longitudinal direction of the rod by engaging the first engaging portion with the second engaging portion.