The cots on the existing bubble film machine have no obvious cooling effect, so the quality of bubble film products can not meet the requirements. The bubble film machine includes die head, forming die, rubber roll, water tank, A fan and B fan. The forming die and rubber roll are meshed together. The die head is located at the upper position of the forming die and the rubber roll, the water tank is located at the lower position of the rubber roll, and the water phase in the rubber roll and the water contact in the tank. The A fan is located outside the end of the forming die, with A air duct along the axis of the forming die, and the A fan is generated. The wind passes through the A duct; the B fan is located outside the end of the rubber roll. A B duct is arranged along the axis of the rubber roll, and the wind generated by the B fan passes through the B duct. As a cot cooling device in bubble film machine, two layers of hot film extruded by die head were cooled by water cooling and air cooling, which made the two layers of hot film completely composite and improved the quality of bubble film products.

Bubble film machine is widely used in packaging of precision electronic instruments, crafts, automobiles, motorcycles, bicycle accessories, ceramic glass products, fire extinguishers and furniture.