A plastic bag blowing device

Abstract

The utility model relates to plastic bag blown film technical field especially, it relates to a kind of plastic bag blown film equipment, including installation base, first cylinder and second cylinder for being used to pull film semi-finished product directional movement are set on installation base, installation base is provided with the drive mechanism for driving first cylinder and second cylinder rotation, cooling mechanism for cooling the film semi-finished product for the straightening of first cylinder and second cylinder is installed on installation base.The utility model drives first ratchet and second ratchet by external gear, provides reliable one-way transmission, prevents cylinder reverse, ensures that film semi-finished product only is stably conveyed to one direction, avoid slack or back roll due to inertia or external force, help to improve operating stability, while film semi-finished product is S type winding on first and second cylinder, sliding second cylinder can directly, quickly change the wrap angle of S type, help to provide stable tension control, thereby reduce uneven stretching.

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