A pressing module for forming cellulose products and a method for forming cellulose products

A method for forming cellulose products from an air-formed cellulose blank structure in a pressing module, wherein the pressing module comprises a forming mould with a first mould part and a second mould part configured for interacting with each other for forming the cellulose products from the air-formed cellulose blank structure in the forming mould, wherein the first mould part and/or the second mould part are movably arranged relative to each other in a pressing direction parallel to a longitudinal direction of the pressing module, wherein the first mould part comprises a first mould part section and a second mould part section arranged in connection to the first mould part section, a second mould part section arranged in connection to the first mould part section and a base structure arranged in connection to the first mould part section and the second mould part section, wherein the first mould part section and the base structure are movably arranged in the longitudinal direction relative to each other, wherein the second mould part section is an elastic deformation element, wherein the method in a single pressing operation comprises the steps:

• providing the air-formed cellulose blank structure and arranging the air-formed cellulose blank structure between the first mould part and the second mould part;
• displacing the first mould part and/or the second mould part into an at least partly overlapping relationship in the longitudinal direction, wherein in the overlapping relationship the first mould part section and the second mould part section are at least partly positioned in a longitudinally overlapping section between the first mould part and the second mould part;
• displacing the first mould part section and the base structure relative to each other in the longitudinal direction, and displacing the second mould part section relative to the first mould part section in the lateral direction of the pressing module through deformation of the second mould part section upon movement of the first mould part section and the base structure relative to each other;
• and
• applying a forming pressure by the first mould part section and the second mould part section onto the air-formed cellulose blank structure in the range of 1-100 MPa, for forming the cellulose products in the forming mould.