<p>Molded fiber products are promising sustainable alternatives to plastic packaging; however, their production efficiency relies strongly on the design of de-watering screens. The designing process of these screens remains labor-intensive and inefficient due to the use of conventional computer-aided design (CAD) design workflows, especially when variable pore patterns or manufacturability constraints are required. This work presents an automated modelling approach based on the Blender Python API for generating 3D-printable molded-fiber dewatering screens. The proposed method allows the implementation of parametric control of screen geometry, hole size, hole distribution and spacing between adjacent holes. Comparative analysis shows that the automated workflow reduced model-generation time by 41.8 − 97.2% compared with the tested manual FreeCAD workflows, depending on the drainage-hole number. The workflow was further demonstrated on screen designs containing up to the industrial scale of 10,000 holes. The proposed approach is also able to produce various drainage hole patterns, including dual-scale, Gaussian, and sinusoidal density functions, that work on a wide range of hardware configurations. The Hausdorff-deviation of 0.052% showed close agreement between the automated approach and the manual CAD design. De-watering tests using 3D-printed screens showed comparable drainage performance between the Blender-designed and FreeCAD-designed screens. These results demonstrate that automated workflow can accelerate the development of manufacturing dewatering screens for sustainable molded fiber packaging.</p> Graphical Abstract <p></p>