Abstract: A mould holding cross member (9) according to the invention comprises a support base (91) a suitable to compress the mould (S) and more projecting, in the mould closing direction, than the ends (90) with which the cross member is connected to the moving columns (6) of the press on which it is fitted. The base (91) is connected to the rest of the cross member by a narrow portion (99) which extends in the central area of the base and between the projections of the hinging areas (7, 8) of the double toggle of the press on the press bed (2), and substantially not outside those projections. In this way the pressures are more uniformly distributed on the mould (S). The present invention also concerns a press fitted with a cross member (9) as defined above.

Abstract: A plastic preforms (5) moulding device and process comprising an injection mould, containing a plurality of injection cavities, an arm (3) for extracting the preforms (5) from the mould, equipped with guillotine-like gripping elements, which moves between the existing space between the half moulds when in the open position in order to grasp the preforms and the external position, a cooling turret (6), with the faces housing a group of cups (7) for the conditioning of the preforms (5), 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 (5), on which are indented longitudinal slots with teeth shaped constrictions in order to grasp the preforms under the ring (9) and to extract them from the cups (7).

Abstract: A nozzle comprises a hollow element comprising a recess and an injection hole (6) to inject fluid plastic into a mould, a heating tip which penetrates inside the recess and forms, together with the recess itself, a holding cavity (5) into which the channels (14) run. The holding cavity (5) comprises narrow section (52) which separates the holding cavity (5) into a rear portion (51) and a front portion (50), in order to reduce or completely prevent exchanges of fluid plastic between the two areas.

Abstract: A heated blow mould for the thermostabilizing treatment, or the heat-set process, where at least a heating system is housed between the mould (2) and mould holder (3). Said system consists of a set of tubular electric resistors, which are parallel to the generator of the mould and of the item to be moulded, connected to each other by additional electric resistors, which are basically transversal in relation to the first resistors and placed in areas requiring greater heat.

Abstract: In the molding of parisons made of thermoplastic material for making bottles for containing effervescent beverages, resistance to bursting of the bottles is increased considerably the gasket (4) between the injector nozzle (3) and the injection cavity (1) is made of thermally insulating material and has a shape that is complementary to the shape of the cavity (1) for housing the end of the injector (3) in the injection cavity (1). Cutting of the sprue in specific conditions increases still more the resistance to bursting.

Abstract: A device (1) for cooling and/or thermal conditioning of hot preforms or parisons (6), in particular of parisons for the production of blow-moulded bottles made of plastic material, limits and/or reduces the deformations of said parisons during cooling by containing the transverse deformations of the end close to the opening (8) of the parison. The device is provided with a tubular portion of prolongation which wraps totally around the parison that rests on its internal surface with one of its sections (9). Described herein is the corresponding method for cooling the parison (6).

Abstract: Apparatus for handling and cooling preforms, comprising a collection element provided with a plurality of receptacles arranged according to a definite geometrical distribution pattern and adapted to accommodate a corresponding plurality of preforms, as well as a cooling element. The collection element is displaceable from a preform loading position to several distinct positions, arranged above the cooling element, which is provided with a plurality of cups collected into a plurality of distinct, but similar geometrical distribution patterns that are translated with respect to each other in such a manner as to prevent them from interfering with each other.

Abstract: An injection molding machine and method of injection molding is provided, in which an upper platen, a moving platen, and a cavity-carrying platen are used. A removable member (cylinder) is provided to limit travel of the moving platen towards the cavity-carrying platen and to support the moving platen.

Abstract: Apparatus for blow moulding hollow plastic bodies from plastic preforms, or parisons, which is adapted to detect bursts occurring in plastic bottles. To this purpose, the apparatus itself comprises a differential pressure transducer arrangement (10, 11), a low-pressure gas supply source (103) along with a related first supply channel (101), a high-pressure gas supply source along with a related second supply channel (105). The differential pressure transducer arrangement is made up by one or more tubes (3, 4) arranged crosswise in the second supply channel; these tubes contain respective separate chambers opening (5, 6) into the interior of said second supply channel (Pitot tubes). Two sensors (7, 8) adapted to detect respective pressures are connected in a distinct manner to said respective chambers.

Abstract: A device (1) for conveying objects (2) having at least one open end (200) (for example plastic bottles and corresponding semi-finished products throughout their production process), including a picking-up and withholding apparatus (20) suitable for gripping and withholding the object from inside the open end (200), and further including a protective sliding sleeve (7, 70) suitable for covering and protecting a pre-determined portion of the object (2) in the proximity of the open end (200) is characterised in that the actuation for picking up or releasing the object (2) by the picking-up and withholding apparatus (20) is independent of the movements of sliding of the sleeve (7, 70), which can be raised or lowered, the object (2) at the same time continuing to be firmly gripped. Device (1) is suitable to be used on a chain conveyor. A method for using device (1) is also provided.

Abstract: A pick-up plug for supporting and transporting preforms of thermoplastic resin, includes a central body, and an engagement mechanism adapted to slip into the neck portion of the preform, in which elastic members are provided on the engagement mechanism so as to press them against the wall of the neck portion, wherein a central body is provided with at least three groove-like recesses opening towards the exterior and the engagement mechanism is constituted by individual and independent gripping members that are housed in respective ones of the groove-like recesses. The elastic members are constituted by respective preloaded springs acting between the inner wall of each groove-like recess and the inner wall of the respective individual gripping member.

Abstract: A fixing device for moulds for plastic articles, where a pair of half-moulds (3, 4) in which a force plug (11) can be inserted, comprises at least one tie rod (6) 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 (60, 61). The tie rod (6) is hinged to a connecting rod which rotates on a pivot fixed to the resting base (14), which, in the movement of rotation, sets the tie rod (6) along the line corresponding to the centroid of the pressure forces produced during the moulding operation.

Abstract: A process and device for drying the coating of containers made of thermoplastic material. The process involves feeding said containers through a furnace divided into two areas: in the first, most of the solvent of the coating is removed by heating the paint with infrared lamps, while the temperature of the containers is controlled through an airflow; in the second, the remaining solvent is removed using said airflow coming from the first area of the furnace.

Abstract: A process and relating plant for applying protective coats of paint to containers, especially plastic bottles. The process involves gripping the bottles by means of rotating gripping devices fastened to a conveyor chain, and conveying said bottles to all the different stations involved in the process: coating, drying, and curing. Centrifugation is used to remove any excess coating from the external surface of the bottles, keeping the bottles fastened to the same conveyor chain.

Abstract: A compression-moulding press for moulding plastic containers (P) consisting of a moulding cavity formed by a plunger (5), a female mould (14), and two separable lips (7, 8). A cylinder (16) slides inside a sliding slide (22) to keep the lips (7, 8) closed. The plunger (5) slides inside the cylinder (16), with respect to both the cylinder (16) and the slide (22), when moulding the containers (P). Finally, a method for making plastic containers by means of compression moulding using said device is also described.

Abstract: In the moulding of parisons made of thermoplastic material for making bottles for containing effervescent beverages, resistance to bursting of the bottles is increased considerably the gasket (4) between the injector nozzle (3) and the injection cavity (1) is made of thermally insulating material and has a shape that is complementary to the shape of the cavity (1) for housing the end of the injector (3) in the injection cavity (1). Cutting of the sprue in specific conditions increases still more the resistance to bursting.

Abstract: A device for compression moulding of plastic objects, comprising a plurality of compression-moulding units (9), each of which comprises a core mould element and a moulding cavity (2) filled by dropping into it a dose of plastic material; each moulding unit (9) is designed to carry out a moulding sequence comprising an operation of opening of the mould, an operation of filling of the moulding cavity, and an operation of closing of the mould. The device further comprises cam mechanisms for taking the moulding cavity outside of the vertical axes of the positive-mould element between the operation of opening of the mould and the operation of filling of the moulding cavity. The invention further relates to a method for the production of plastic objects by means of compression moulding device as described above.

Abstract: Apparatus for blow moulding plastic containers, comprising a plurality of pairs of half-moulds (1, 2) capable of being coupled with each other, separated from each other and clamped together, said pairs (1, 2) being associated to an appropriate central structure and constituted by a stationary half-mould (1), which is substantially attached to said structure, and a respective moving half-mould (2) capable of being opened and clamped with a rotary motion, in which there are provided means adapted (3, 4) to arrange a respective preform (7) in a pre-defined position adapted for blow moulding, and to hold this preform (7) in this position regardless of the position of the respective half-moulds (1, 2), these means being in particular constituted by: a fork means (3) firmly joined to a respective stationary half-mould (1), a pincer-like gripper (5) adapted to transfer a respective preform (7) from an external position and fit it on to the respective fork means (3), and a small-tube (4) assembly adapted to be inser

Abstract: A plant for cooling preforms has a collection and translation element provided with a plurality of receptacles adapted to accommodate respective preforms that are usually knocked out of an injection mould. A revolving-turret element has two opposite surfaces provided with a plurality of cups adapted to accommodate respective performs. The turret revolves in a controlled manner about a horizontal axis so as to successively orientate the two surfaces upwards and downwards, and the collection and translation element can be displaced with a translational motion from a preform loading position selectively to a plurality of distinct positions, which lie above the surfaces of the turret when rotated upwards, and can engage and release the preforms from the respective receptacles.

Abstract: Apparatus for the alignment of a plurality of bottles whose body is in the shape of a parallelepiped, and which are furthermore oriented in such a manner that said bottles are provided with respective axes centered on to the respective mouth, and the respective walls are inclined at either acute or obtuse angles with respect to the plane passing through said axes, in which there is provided a structure comprising two comb-like members (10, 11) and plurality of cylindrical cups (26) inserted in appropriate housings provided between said comb-like members (10, 11), wherein said cups (26) hold respective bottles (3) and are made in such a manner as to ensure that the corners of the bottles (3) are capable of being arranged in contact with the inner surface of said cups; said surface is in the shape of a plurality of plane surfaces spaced from each other by configurations in the shape of an arc of a circle having a radius (R) that is equal to the inner radius of the cups (r).