Abstract: The present invention relates to an injection and blow mold for an injection machine, the mold comprising one or more rows of molding cavities arranged in a base plate (5), each row of cavities including several injection cavities (1) and several blow cavities (2) arranged in an alternating manner and aligned with one another, with blow cavities (2) at opposite ends of the row. The injection cavities (1) are formed individually in respective injection blocks (3) and the blow cavities (2) are formed individually in respective blow blocks (4). The injection blocks (3) and the blow blocks (4) are separated from one another and project from the base plate (5). The injection blocks (3) are heated by external heating means relative to the base plate (5), and the blow blocks (4) are cooled by a cooling fluid circulating through cooling conduits (7a) arranged inside the blow blocks (4).

Abstract: The two-layered preform includes a tubular body having a mouth providing a neck at a first end thereof and a closed bottom at an opposite second end. At least part of the tubular body is formed by a first layer (P1) made of a primary molding material and a second layer (P2) made of an overmolding material. The first layer (P1) is an inner layer made of a primary molding material providing a barrier effect against light by absorption, and the second layer (P2) is an outer layer made of an overmolding material providing a barrier effect against light by reflection. The neck is formed with the overmolding material of the second layer (P2) not coated by the primary molding material of the first layer (P2).

Abstract: The two-layered preform includes a tubular body having a mouth providing a neck at a first end thereof and a closed bottom at an opposite second end. At least part of the tubular body is formed by a first layer (P1) made of a primary molding material and a second layer (P2) made of an overmolding material. The first layer (P1) is an inner layer made of a primary molding material providing a barrier effect against light by absorption, and the second layer (P2) is an outer layer made of an overmolding material providing a barrier effect against light by reflection. The neck is formed with the overmolding material of the second layer (P2) not coated by the primary molding material of the first layer (P2).

Abstract: The mold includes a first molding cavity connected to a first hot channel for supplying a primary molding material, a second overmolding cavity connected to a second hot channel for supplying an overmolding material; and a core configured to be first introduced in the first cavity for a molding operation of a first layer, and to then be introduced, with the first layer thereon, in the second cavity for an overmolding operation of a second layer. At least one supporting member is arranged to support the core with respect to the first cavity during the entire molding operation of the first layer. An opening left in the first layer by the supporting member is filled and/or covered by the second layer.