Blow molds
Extrusion blow-molding of large hollow plastic bodies

The mould ensures :

• the final shape of the product by contact of the parison with the mould cavity during blowing;

• gluing the parison back together to form the envelope;

• sealing the envelope in the mold;

• cooling the envelope through heat exchange.

A mould consists of the following components (figure 37):

• the impression, into which the shape of the blown body is carved;

• the socket, which secures the impression to the press platens;

• Settling, which guides and centers the mold during closing;

• cooling circuits, which ensure cooling of the mold cavity and therefore external cooling of the part in the mold;

• blowing orifices, which...