S.i.p.a. Societa' Industrializzazione Progettazione E Automazione S.p.a.

Sipa S.p.a

S.i.p.a. Societa' Industrializzazione Progettazione Automazione S.p.a.

Jader Pavanetto

Matteo Zoppas

Massimo Coran

Igor Bottacco

A device and process for conditioning plastic preforms () comprising a cooling turret () featuring faces fitted with many holders () for conditioning preforms (). This turret rotates around a horizontal axis (X) and carries out a vertical traverse between a top position under an arm (), which unloads the preforms from the mould, and a bottom position near the table for extracting the preforms () from the turret (). Tie structure of the turret consists of two parallel bars () and several joining plates () to which the bases of the holders () are attached.

Conditioning device for plastic items and process

A device and process for extracting plastic preforms () from holders. Said device comprises a plate (), which features straight slits () positioned parallel to each other, that is attached to a supporting table (). Each slit () comprises wider sections and constrictions (), which have a width (L) smaller than the diameter of the ring () of the preform, so that the ring () can be fitted into the slit () through the wider section. The plate () is moved in the direction &#x3c;&#x3c;D&#x3e;&#x3e; by a specific length until the constrictions are positioned under the ring, and, thus, the preforms are removed by moving the plate away from the holders.

Device and process for extracting plastic items

A plastic preforms () molding device and process comprising an injection mold, containing a plurality of injection cavities, an arm () for extracting the preforms () from the mold, equipped with guillotine-like gripping elements, which moves between the existing space between the half molds when in the open position in order to grasp the preforms and the external position, a cooling turret (), with the faces housing a group of cups () for the conditioning of the preforms (), which effects a rotational movement around a horizontal axis and a vertical translation movement between the high position under the extraction arm to receive the preforms and the low position corresponding to the extraction table of the preforms (), on which are indented longitudinal slots with teeth shaped constrictions in order to grasp the preforms under the ring () and to extract them from the cups ().

Injection device and process for plastic objects

A fixing device for moulds for plastic articles, where a pair of half-moulds () in which a force plug () can be inserted, comprises at least one tie rod () for keeping the two half-moulds in a closed position, the said tie rod being hinged, at one end, to the mobile half-mould and having a second end of a hammer-headed shape which hooks to two gripping jaws (). The tie rod () is hinged to a connecting rod which rotates on a pivot fixed to the resting base (), which, in the movement of rotation, sets the tie rod () along the line corresponding to the centroid of the pressure forces produced during the moulding operation.

Fixing device for moulds

A hydraulic press apparatus comprises: a lower plate and an upper plate adapted to be driven toward the lower plate via operation of a motion a position control device; a hollow cylinder under the lower plate, the hollow cylinder having an upper edge tightly engaged with a lower surface of the lower plate; a guide column connected to the upper plate, the guide column having a lower end portion that defines a rod for a first piston adapted to slide within the hollow cylinder, and the guide column defining an inner cylindrical cavity that extends through the first piston, with the inner cylindrical cavity being filled with hydraulic fluid; a hole extending through the lower plate, the hole being adapted to slidably accommodate said guide column; an aperture in a side surface of the hollow cylinder, the aperture allowing a volume defined between the lower plate and the first piston to communicate with a hydraulic device that is adapted to apply a hydraulic pressure within the volume when the first piston is in a lower position; a plunger piston adapted to slide within the inner cylindrical cavity, the plunger piston including an upper cylindrical portion that has a diameter such that the upper cylindrical portion is capable of plugging the inner cylindrical cavity, the plunger piston also including a lower portion that has a diameter smaller than the diameter of the upper cylindrical portion so as to prevent the lower portion from contacting walls defining the inner cylindrical cavity; and a through-bore allowing the inner cylindrical cavity to communicate with the volume when the upper cylindrical portion is at a level that is beneath a level of the through-bore.

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Mestre, Italy

Jader Pavanetto