One kind of general locking device for the hot press board of hot press machine

This patent is four-bar linkage general locking device,which consists of two sets of synchronizing linkage device.This makes the up-down moving of hot pressboard be general locking and the rising and dropping of oil cylinder will not be deviating.The using life of sealing ring for oil cylinder is increasing. It reduces the maintenance cost,and it improves the quality of the product’s surface.