A cleaning mechanism for injection molding machine includes a base including a mounting frame, a driving member, a pushing member connected to the driving member, a first movable plate, a first clipping plate, a connection shaft rotatably connected to the first pushing plate, a second movable plate parallel to the first pushing plate, and a second clipping plate. An ablation device can include a hinge including a cam assembly, a moving arm, a floating jaw, and a lower jaw. Preferred nano-particles are biopolymers such as starch and the coating is preferably substantially free of wax which has been found to reduce oxygen barrier effectiveness.