<p>The present invention is related to a molding unit which includes a fixed member and a movable member that move relatively in a predetermined direction; a constructive featured portion that is formed on one of the fixed member and the movable member and in a predetermined pattern in the predetermined direction; a detector that is provided on another one of the fixed member and the movable member and detects the predetermined pattern of the constructive featured portion; and a position detector that detects a position of the movable member based on the predetermined pattern detected by the detector.</p>
