Automatic granule unpacking and discharging device, hook needle mechanism and folding and unfolding mechanism

The invention discloses an automatic granule unpacking and discharging device, a hook needle mechanism and a folding and unfolding mechanism. The automatic granule unpacking and discharging device comprises a bag support mechanism, a cutting mechanism and a folding and unfolding mechanism, wherein the bag support mechanism is used for bearing and supporting a material bag, and the bag support mechanism is provided with a channel for cutting the material bag and folding, unfolding, discharging, pushing and recycling the material bag; the cutting mechanism is mounted on the bag support mechanism, and when the material bag is carried to a preset position, the cutting mechanism acts to unpack the material bag; the folding and unfolding mechanism is folded below the bag support mechanism in an initial state; and a pair of opposite support claws is arranged on the folding and unfolding mechanism, after the material bag is cut and unpacked, the support claws enter the material bag through a cutting opening of the ma