Method for manufacturing moulded parts from fibre composite material, comprising the following steps: a) providing a press (1, 1') with - a first pressing tool, - a second pressing tool, and - a membrane, - wherein the first pressing tool and the second pressing tool can be moved relative to one another, - wherein the membrane is connected to one of the pressing tools, - wherein a cavity for a working medium is formed between the membrane and the pressing tool connected thereto, - wherein a working space (8, 8') for a workpiece is formed in the other pressing tool, and - wherein, when the press (1, 1') is closed, the volume of the working space (8, 8') can be changed by moving the membrane, b) providing at least one workpiece (17, 17') with a workpiece volume (V W1, V W1 '), wherein the workpiece (17, 17') has a matrix and fibres inserted therein, c) inserting the workpiece (17, 17') into the working space (8, 8') of the press (1, 1'), d) closing the press (1, 1'), wherein the working space (8, 8') occupies a first volume (V 1, V 1 '), e) applying pressure and/or temperature to the workpiece (17, 17') by means of the membrane, wherein the working space (8, 8') occupies a second volume (V 2, Vz`) and wherein a hardened moulded part is formed from the workpiece (17, 17'), and f) opening the press (1, 1') and removing the moulded part, characterised in that the first volume (V 1, V 1 ') of the working space (8, 8') is smaller than the workpiece volume (V w1, V w1 ') such that the workpiece (17, 17') is already compressed in step d) and before step e). a) providing a press (1, 1') with - a first pressing tool, - a second pressing tool, and - a membrane, - wherein the first pressing tool and the second pressing tool can be moved relative to one another, - wherein the membrane is connected to one of the pressing tools, - wherein a cavity for a working medium is formed between the membrane and the pressing tool connected thereto, - wherein a working space (8, 8') for a workpiece is formed in the other pressing tool, and - wherein, when the press (1, 1') is closed, the volume of the working space (8, 8') can be changed by moving the membrane, - a first pressing tool, - a second pressing tool, and - a membrane, - wherein the first pressing tool and the second pressing tool can be moved relative to one another, - wherein the membrane is connected to one of the pressing tools, - wherein a cavity for a working medium is formed between the membrane and the pressing tool connected thereto, - wherein a working space (8, 8') for a workpiece is formed in the other pressing tool, and - wherein, when the press (1, 1') is closed, the volume of the working space (8, 8') can be changed by moving the membrane, b) providing at least one workpiece (17, 17') with a workpiece volume (V W1, V W1 '), wherein the workpiece (17, 17') has a matrix and fibres inserted therein, c) inserting the workpiece (17, 17') into the working space (8, 8') of the press (1, 1'), d) closing the press (1, 1'), wherein the working space (8, 8') occupies a first volume (V 1, V 1 '), e) applying pressure and/or temperature to the workpiece (17, 17') by means of the membrane, wherein the working space (8, 8') occupies a second volume (V 2, Vz`) and wherein a hardened moulded part is formed from the workpiece (17, 17'), and f) opening the press (1, 1') and removing the moulded part, characterised in that the first volume (V 1, V 1 ') of the working space (8, 8') is smaller than the workpiece volume (V w1, V w1 ') such that the workpiece (17, 17') is already compressed in step d) and before step e).