In principle Blow molding is a way of printing hollow workpieces using a mold consisting of two parts of the mold that does not use the core as the cavity-shaper. Indeed, in terms of types of workpieces that can be produced with mold, there are two kinds, which forces people to choose one of them because the technical spawn core or core forming holes or sockets. Meanwhile, don’t forget to also check out the recommended mould supplier as well.

In blow molding this cavity must be present on the workpiece will be produced by blowing air into the material that has been prepared. Plastic material to be formed in the form of a pipe that will come out slowly down from an extruder head, and after a long enough will be captured by both parts of the mold and clamped, While the bottom will be entered by a blow-pin, which will blow air into the pipe plastic that is still soft so that the plastic pipe will expand and form a building like the shape of its mold. Of course, the thickness of the workpiece wall will become thinner than the thickness of the material pipe.

The mold is also fitted with a cooling duct inside the two halves of the mold so that the materials that are formed immediately harden and can be removed from the mold. Then the machine will prepare a new material (plastic pipe) again, and the same process will be repeated again until new products are formed again, and so on. It also comes with a new plastic cutter out of the extruder head, so it does not interfere with the blowing process.

In accordance with the capacity of the engine, we can also print with some cavity at once but of course, must be equipped with the appropriate type of extruder.

For the important parts of this blow mold, we will learn in more detail later on the next pages.