In this thesis, the design of injection molding device has been described. Design is based on product requirements such as ability to manually transfer the device (low weight, handle), compactness, ability to create parts of various shapes (mold exchangeability). The development process included defining the product goals, requirements list and functions it has to execute. For each function, several possible solutions were found, based on which four product versions have been conceived. The optimal solution has been designed and documentation needed for production and assembling of the device has been created.