Method for producing a refiner disc segment

A method for producing a disc-type refiner segment for refining lignocellulosic material, comprising:

• providing production data of a first model;
• supplying the production data of the first model to a 3D printer;
• 3D printing a first model;
• using the first model to generate a first part mold;
• molding or casting with a first metal material having a first melting point a first inner die part using the first part mold;
• providing production data of a second model;
• supplying the production data of the second model to a 3D printer;
• 3D printing a second model from a printing material;
• combining the first inner die part and the second model to create a first die model;
• using the first die model to generate a first die mold;
• performing a burnout process on the first die mold;
• molding or casting with a second metal material having a second melting point a first die using the first die mold, wherein the second melting point is lower than the first melting point;
• providing a second die;
• forming a sand model by compressing molding sand between the first die and the second die;
• and
• casting a refiner disc segment by casting a third metal material using the sand model.