Thermal shrinking after sealing is one of the most advanced packing methods on the present market. It adopts wrapping the film outside of the goods, and then after heating, the film will be tightly shrunk on the goods, which fully display the appearance, improve the goods exhibit sell and increase the value of the goods. Meanwhile, the packed goods can be sealed well, moisture-proof and anti-dirty. It can protect the goods from external shocks with a buffer, especially for the some fragile. It can prevents fragile from splashing when packed fragile crushed. Besides, it can decrease the possibility of being demolished or stolen. To be simple, the machines pack the products with a layer of plastic film, which makes the packaging more beautiful and firm. It is widely used for packing boxes, toys, electronic bricks, books, magazine and so on.