In February, VulcanForms, a Devens-based metal manufacturing company, announced it had raised $220 million in venture capital to expand its facility footprint. The firm’s VC raise is just one of the latest in a string of larger- and smaller-scale Central Massachusetts companies raising capital to fund their expansions. In September, Westborough-based defense optics manufacturing firm Kopin Corp. entered into a $41-million securities purchase and in January, DualBird, a Westborough-based data and AI infrastructure, raised $25 million. Looking ahead, American Vinegar Works, a vinegar brand out of Worcester, is planning on raising $1.5 million in order to move into a larger manufacturing space in the region.