Puhallusmuovausta

Puhallusmuovaus, often translated as blow molding, is a manufacturing process used to produce hollow plastic parts. It involves inflating a molten plastic tube, known as a parison, into a mold cavity. The plastic is then cooled and solidifies, taking the shape of the mold. This method is widely used for creating a variety of products, including bottles, containers, tanks, and some toys.

The process begins with melting plastic pellets and extruding them through a die to form a hollow tube. This parison is then placed between two halves of a mold, which closes around it. Compressed air is introduced into the parison, forcing it to expand and press against the inner walls of the mold. Once the plastic has cooled sufficiently, the mold opens, and the finished hollow part is ejected.

There are two main types of blow molding: extrusion blow molding and injection blow molding. Extrusion blow molding is the most common, suitable for large parts and high production volumes. Injection blow molding, on the other hand, is a two-step process that involves injection molding a preform before blowing it, offering greater precision and suitability for smaller, more complex items. Both methods are valued for their efficiency and ability to create seamless, hollow structures.