Persico Spa

Lorenzo Bergamo

Claudia Persico

A mold for the rotational molding of manufactured articles of plastic material includes two half-molds, one of which is provided, on its surface, with an insert-holding device comprising a rod with a first end passing through the wall of the half-mold at a respective passage channel and axially movable for projecting inside the mold. The mold also comprises a first pneumatic circuit able to apply a predetermined pressure, positive or negative, inside the mold. At least one insert-holding device is operatively connected to a second pneumatic circuit able to apply a predetermined pressure, positive or negative, and is internally provided with a plurality of means to apply the predetermined pressure at the passage channel, so that at the insert-holding device the same predetermined pressure value which generates inside the mold by the first pneumatic circuit is applied.

Mould for the rotational moulding of plastic materials

A machine for rotational molding of products comprises means () for driven rotation of a mold around perpendicular axes (), means () for direct heating of the mold and means () for commanded opening of the mold in half molds. The machine further comprises combined means () for arresting in a predetermined position of the rotating means of the mold disengageable retaining means () for retaining the product in a preset half mold, and evacuating means () for evacuating the product that are suitable for being introduced between the open half molds when the rotating means is stopped in said predetermined position and which is suitable for receiving the product discharged from said preset half mold upon the release of the retaining means.

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Bergamo, Italy

Lorenzo Bergamo