This device breaks through the traditional processing size limit and can form sand molds up to 4 meters in size. The equipment creatively adopts the sand free flexible zone forming technology, breaking the strange phenomenon of larger equipment forming sizes and skyrocketing equipment prices, making it possible for equipment with a size of 4 meters or larger to be priced almost the same as equipment with a size of 2.5 meters. Economical and flexible, achieving ultra large sand mold manufacturing with lower unit costs and shorter delivery times, and customizing and expanding printing platforms according to user needs to meet production demands of 10 meters+(6-meter/8-meter/10 meter equipment is currently available for simultaneous booking), helping users maximize productivity