Windsor Machines Limited engages in the manufacture, marketing, and sale of plastic processing machinery in India and internationally. The company operates through Extrusion Machinery and Injection Moulding Machinery segments. It offers injection molding machines that are used for a range of applications, including households, furniture, medical, white goods, electrical and electronics, automotive, packaging, and construction industries; pipe extrusion lines for various applications, such as agriculture, drip irrigation, telecom, and potable drinking water solutions; and blown film lines. The company was incorporated in 1963 and is based in Ahmedabad, India. Windsor Machines Limited is a subsidiary of Castle Equipments Private Limited.