Abstract: A method for dry manufacturing rigid cellulose products having non-flat general shape and an internal cavity. The method includes the steps of, pressing at least one product area of the first cellulose blank segment into a final rigid non-flat shape, keeping a rim area of the first cellulose blank segment in a non-final non-rigid shape, pressing at least one product area of the second cellulose blank segment into a final rigid shape, placing the rim area of the first cellulose blank segment in contact with a rim area of the second cellulose blank segment, and joining the rim areas of the first and second cellulose blank segments into a homogenous final rigid rim, thereby obtaining the rigid cellulose product having non-flat general shape wherein the internal cavity is delimited by the pressed product areas of the first and second cellulose blank segments.

Abstract: A method for dry manufacturing rigid cellulose products having an essentially non-flat general shape from cellulose fibres comprising the steps of: providing a quantity of separated cellulose fibres from a dry cellulose raw material in at least one separating unit, providing the separated cellulose fibres onto a support structure for forming a cellulose blank, producing the rigid cellulose product having essentially non-flat general shape by pressing the cellulose blank in a product forming unit having a moulding tool for forming the rigid cellulose product, by means of at least one imprinting tool before the step of producing the rigid cellulose product, imprinting the cellulose blank by providing an imprinted pattern onto the cellulose blank to increase internal bonding between individual cellulose fibres at the location of the imprinted pattern to prevent mutual separation of the individual cellulose fibres during the pressing of the cellulose blank in the product forming unit.

Abstract: The invention relates to an apparatus (100) and method for dry manufacturing rigid cellulose products having essentially non-flat general shape. The apparatus (100) comprises a disintegrating unit (3), a multi-stage cellulose blank forming unit (30) and a product forming unit (40) for producing rigid cellulose products (14).

Abstract: A method for dry manufacturing rigid cellulose products having an essentially non-flat general shape from cellulose fibres comprising the steps of: providing a quantity of separated cellulose fibres from a dry cellulose raw material in at least one separating unit, providing the separated cellulose fibres onto a support structure for forming a cellulose blank, producing the rigid cellulose product having essentially non-flat general shape by pressing the cellulose blank in a product forming unit having a moulding tool for forming the rigid cellulose product, by means of at least one imprinting tool before the step of producing the rigid cellulose product, imprinting the cellulose blank by providing an imprinted pattern onto the cellulose blank to increase internal bonding between individual cellulose fibres at the location of the imprinted pattern to prevent mutual separation of the individual cellulose fibres during the pressing of the cellulose blank in the product forming unit.

Abstract: An apparatus for dry manufacturing rigid cellulose products having essentially non-flat general shape comprising a disintegrating unit, a cellulose blank forming unit, and a product forming unit. The cellulose blank forming unit comprises a dispenser for guiding a cellulose fibre carrying air flow from the disintegrating unit, and a forming drum having an outer surface comprising perforations. The outer surface is configured for receiving cellulose fibres and forming a continuous or discontinuous cellulose blank, and comprises a first area having a first perforation density and a second area having a second perforation density less than the first perforation density for forming the cellulose blank with higher grammage at first locations originating from the first area than at second locations originating the said second area. The apparatus further comprises an air removing device arranged inside the forming drum, and a support structure for receiving the cellulose blank from the forming drum.