As introduced in the last article, the material will become the final shape of the product after stretching. 

At this time, it is a whole piece of product, and we need to cut it into individual products with a knife die. This process is called Extrusion Press.

The principle is that there is a large plastic chopping block on the bottom of the lower punch. The large-sized products are placed on the chopping block, and the pre-made knife die is clamped on a single product, and a single finished product is cut out by the up-and-down movement of the punch.

There is a kind of blister packaging called slide blisters, which needs to fold the three sides of the bubble shell to the back of the product with a folding machine, so that the paper card can be inserted into the folding edge in the next packaging process to form slide blisters.

Blister folding is the hot-pressing folding of the edge of the molded blister product by a folding machine after being heated. There are three folds and four folds, and a paper card is inserted on the back, which is also called blister folding card. This kind of packaging usually includes stationery packaging, and card packaging for hardware accessories.