Abnormality determination device and abnormality determination method for an additive manufacturing apparatus

An abnormality determination device for an additive manufacturing apparatus for building a part having three-dimensional shape by repeatedly forming a membrane of raw material and forming a cured layer having two-dimensional shape, the membrane formed by a blade in a build area, the raw material including ceramic particles and photocurable resin, the cured layer formed by irradiating the membrane with light in the build area, the abnormality determination device comprising a controller configured to perform abnormality determination based on an image captured by an image sensor,

• the controller is configured to:
• acquire the image of the membrane captured by the image sensor;
• detect an abnormal portion appearing in the membrane based on the acquired image of the membrane;
• determine whether the detected abnormal portion is a linear abnormal portion appearing as a line extending along a movement direction of the blade or a point-like abnormal portion appearing at a point;
• determine that layering fault has occurred when it is determined that the detected abnormal portion is the linear abnormal portion;
• and
• determine that the layering fault has not occurred when it is determined that the detected abnormal portion is the point-like abnormal portion.