| 摘要 |
FIELD: different cooling around the edges of film tubing extruded from thermoplastic artificial material. SUBSTANCE: materials is blown for production of film with the aid of a blow head, from which the tubing is blown by differently heated or cooled around its edges cooling air, whose specific feature is the fact that cooling air introduced in the annular built-up chamber is divided into a great member of flow jets differently heated or cooled with the aid of heating appliances located in separated flow jets and radially directed to the film tubing being extruded. EFFECT: facilitated procedure. |
