Corridor Business Journal: North Liberty molding company Centro Inc. announced Tuesday that it has purchased a 30,000-square-foot building in Hampton to expand production capacity throughout the Midwest and accommodate its rapid growth. The new facility will house two rotational molding machines and employ 30 new workers. Centro is the largest custom rotational molder in North America. It designs and manufactures products for original equipment manufacturers in markets such as agriculture, construction, and lawn and garden.