Chennai-based dairy product manufacturer Hatsun Agro Product Ltd plans to set up facilities for its ice cream, milk and related products business. The investment of Rs 450 crore is likely to be made in 18 months. The production capacity of the ice cream plant would be increased from 1 lakh litre to 1.5 litre per day at a capex of Rs 135 crore. Around 600-700 stores are planned to be set up.