The design approach to be followed provides for phase change actuators whose housings completely enclose the phase change material (Figure ). Paraffin wax is used as a phase change material. During the conversion from the solid to the liquid phase, paraffin undergoes a volume increase of 15 percent and more. Due to the high volume expansion and low compressibility, paraffin can generate a high pressure in sealed housings. This is used for a reversible deflection of the actuator housing. The work described here is intended to create the basis for a new product architecture of low-cost actuators with high realizable forces. Demonstrator actuators, for example, could minimize the numerous positioning tasks in autonomous production systems (Figure ). The first phase of the four-year overall project focuses on the function verification of the actuator principle. This requires the development and production of the actuator housing.