Mould manufacturing device for the manufacture of moulded articles by locally selective solidifying of material powder to coherent areas, comprising - a process chamber with a powder inlet for material powder to be treated and a powder outlet for excess material powder, - a powder supply apparatus (80, 82) connected or connectable to the powder inlet for providing material powder in the process chamber and - a powder reprocessing apparatus connected or connectable to the powder outlet for recovering material powder to be processed from the excess material powder, wherein the powder supply apparatus (80, 82) and the powder reprocessing apparatus are linked to each other to form an assembly which is arranged as an exchange module (16; 16a), which has connection interfaces, namely at least one input interface and at least one output interface, which are connection-compatible with respective connection interfaces (40, 44) of the powder inlet and the powder outlet of the process chamber, so that, on the one hand, excess powder from the process chamber can be fed through its powder outlet to the powder reprocessing apparatus through the at least one input interface and, on the other hand, material powder processed by the powder reprocessing apparatus can be fed through the at least one output interface to the process chamber through its powder inlet, wherein the mould manufacturing device further comprises a purging apparatus for purging the process chamber with a purging gas, preferably inert gas, which has the following features: a gas inlet for letting the purging gas into the process chamber, a gas outlet for discharging purging gas from the process chamber, a filter arrangement (98, 102) downstream of the gas outlet and a gas conveying apparatus, in particular a pump, in series connection with the filter arrangement (98, 102) and preferably arranged on the outlet side of the filter arrangement (98, 102), a gas pipe system which comprises the gas outlet, the filter arrangement (98, 102) and the gas conveying apparatus, wherein the filter arrangement (98, 102) and the gas conveying apparatus are accommodated in an exchange module, which is preferably identical to the exchange module which comprises the powder supply apparatus (80, 82) and the powder reprocessing apparatus, and wherein the gas pipe system comprises a connection interface associated with the gas outlet on the process chamber-side and a connection interface on the exchange module-side removably connected or connectable thereto, wherein the exchange module can be transferred from a disconnection position into a defined connection position, so that in the connection position it is integrated into the mould manufacturing device in such a way that the connection interfaces (92, 94) of the gas pipe system can be connected or are connectable to each other. - a process chamber with a powder inlet for material powder to be treated and a powder outlet for excess material powder, - a powder supply apparatus (80, 82) connected or connectable to the powder inlet for providing material powder in the process chamber and - a powder reprocessing apparatus connected or connectable to the powder outlet for recovering material powder to be processed from the excess material powder, wherein the powder supply apparatus (80, 82) and the powder reprocessing apparatus are linked to each other to form an assembly which is arranged as an exchange module (16; 16a), which has connection interfaces, namely at least one input interface and at least one output interface, which are connection-compatible with respective connection interfaces (40, 44) of the powder inlet and the powder outlet of the process chamber, so that, on the one hand, excess powder from the process chamber can be fed through its powder outlet to the powder reprocessing apparatus through the at least one input interface and, on the other hand, material powder processed by the powder reprocessing apparatus can be fed through the at least one output interface to the process chamber through its powder inlet, wherein the mould manufacturing device further comprises a purging apparatus for purging the process chamber with a purging gas, preferably inert gas, which has the following features: a gas inlet for letting the purging gas into the process chamber, a gas outlet for discharging purging gas from the process chamber, a filter arrangement (98, 102) downstream of the gas outlet and a gas conveying apparatus, in particular a pump, in series connection with the filter arrangement (98, 102) and preferably arranged on the outlet side of the filter arrangement (98, 102), a gas pipe system which comprises the gas outlet, the filter arrangement (98, 102) and the gas conveying apparatus, wherein the filter arrangement (98, 102) and the gas conveying apparatus are accommodated in an exchange module, which is preferably identical to the exchange module which comprises the powder supply apparatus (80, 82) and the powder reprocessing apparatus, and wherein the gas pipe system comprises a connection interface associated with the gas outlet on the process chamber-side and a connection interface on the exchange module-side removably connected or connectable thereto, wherein the exchange module can be transferred from a disconnection position into a defined connection position, so that in the connection position it is integrated into the mould manufacturing device in such a way that the connection interfaces (92, 94) of the gas pipe system can be connected or are connectable to each other.