Abstract: A plant for blow-moulding plastic containers (2) from respective parisons (3) is equipped with a plurality of interchangeable moulding units (15), each having a certain number of cavities (19) for blow-moulding respective containers (2); and a line (9) for feeding the containers (2) from the moulding units (15) to a filling machine (10); the feed line (9) comprising a dispensing device (80) designed to space the containers (2) according to a spacing (P2) that is constant and independent of the number of moulding cavities (19) in the moulding units (15) mounted at a given time.

Abstract: A plant for blow-moulding plastic containers (2), particularly bottles, from respective parisons (3) comprises at least one moulding unit (15) composed of two half-moulds (17a, 17b), each mobile relative to the other half-mould (17a, 17b) between a position of opening and a position of closing at least two cavities (19) for blow-moulding containers (2); the two half-moulds (17a, 17b) being oriented in such a way that they close in a closing plane (20) that is substantially tangent to the feed path (P) of the moulding unit (15).

Abstract: A moulding unit for a plant for blow-moulding plastic containers (2), particularly bottles, from respective parisons (3) is equipped with an interchangeable mould (16) having at least one cavity (19) for blow-moulding a respective container (2), and at least two stretching rods (33) mobile along a predetermined line (24) to engage respective parisons (3) and to axially deform the parisons (3) themselves; the stretching rods (33) being selectively mobile according to the number and/or position of the moulding cavities (19) of the mould (16) mounted on the moulding unit at a given time.

Abstract: A plant for blow-moulding plastic containers (2) from respective parisons (3) is equipped with a plurality of interchangeable moulding units (15), each having a predetermined number of moulding cavities (19) for blow-moulding respective containers (2); with a wheel (39) for feeding the parisons (3) to the respective moulding cavities (19); with a wheel (76) for picking up the containers (2) from the respective moulding cavities (19); and with two lines (41, 79) for feeding the parisons (3) to the first transfer wheel (39); and the containers (2) from the pick-up wheel (76) to a filling machine (10), respectively; the feed speeds of the two feed lines (41, 79) vary according to the number of moulding cavities (19) in the moulding units (15) mounted on the plant at a given time.

Abstract: An apparatus for forming an object from a dose of plastics comprises a die arrangement provided with a cavity for receiving said dose and with at least two parts that are reciprocally movable for shaping an undercut portion of said object, at least one fluid for applying a clamping force so as to keep said at least two parts in contact; said at least one fluid is such as to increase discontinuously said clamping force from an initial force that is applicable when said dose is substantially contained in said cavity to a final force applicable when said at least two parts shape said undercut portion.

Abstract: An apparatus (1) for making plastic containers by blow-moulding parisons comprises: a mould (2) having at least one moulding cavity; a base (3) mounted over the mould (2), forming at least one passage (4) connected to a high-pressure fluid source; a blow nozzle (7) forming at least one conduit and connected to a bottom face (5) of the base (3) to be positioned between the base (3) and the mould (2) in such a way that the conduit is in fluid communication with the passage (4) to receive the high-pressure fluid and convey it into the moulding cavity; fastening means for coupling and uncoupling the blow nozzle (7) to and from the base (3); at least one pin (10) protruding from the nozzle (7) to be inserted into a respective through hole in the base (3) with an end portion (12) of it positioned above a top face (6) of the base (3); a fastening element (13) connected to the base (3) to be movable from an unlocked position, where it does not interfere with the pin (10), to a locked position where it is inserted in

Abstract: A moulding unit for a plant for blow-moulding plastic containers (2) from respective parisons (3) comprises: two half-moulds (17a, 17b), movable relative to each other between a position of opening and a position of closing at least one cavity (19) for blow-moulding a respective container (2); and a locking device (21) for locking the two half-moulds (17a, 17b) in the closed position, the locking device (21) comprising two first fastening elements (22, 28) which are moved to, and normally held in, a locked position by at least one elastic actuating element (30).

Abstract: A plant for blow-moulding plastic containers (2) from respective parisons (3) comprises a plurality of moulding units (10), each having a mould (11) for blow-moulding at least one container (2) and at least one stretching rod (14) that moves under the action of a drive device (16) in such a way as to axially deform a respective parison (3); the drive device (16) comprises, for each moulding unit (10) drive motor (17) coupled to the stretching rods (14) of the moulding unit (10) itself.

Abstract: A method for separating a portion of extruded material from the continuous strip leaving an extruder, consisting of passing in front of the extrusion nozzle a withdrawal device associated with at least one cutting member; said withdrawal device and said at least one cutting member are made to move independently of each other with velocities, in the sense of vectors, which differ from each other and differ in relation to the material portion separated.

Abstract: An apparatus for forming an object from a dose of plastics comprises a die arrangement provided with a cavity for receiving said dose and with at least two parts that are reciprocally movable for shaping an undercut portion of said object, at least one fluid for applying a clamping force so as to keep said at least two parts in contact; said at least one fluid is such as to increase discontinuously said clamping force from an initial force that is applicable when said dose is substantially contained in said cavity to a final force applicable when said at least two parts shape said undercut portion.

Abstract: An apparatus comprises a carousel arrangement, operating devices associated with said carousel arrangement and arranged for interacting with objects and conveying units supported by said carousel arrangement and movable in relation to said carousel arrangement to transfer said objects, each of said conveying units supporting a plurality of said operating devices.

Abstract: The unit comprises a moulding machine having a plurality of press moulds (N) for moulding the article, which operate in sequence and are driven along a fixed operative path (P), and a feeder means (20) located in a fixed position to the side of said operative path (P) to feed to each mould (N) at least one component part (8) of the article. According to the invention, a plurality of loading means (30) are provided, each rigidly associated with a respective mould (N) and movable with the mould along said operative path (P), said loading means (30) moving relative to the respective mould (N) to transfer one component part (8) at a time from the feeder means (20) to the mould (N).

Abstract: A method for separating a portion of extruded material from the continuous strip leaving an extruder, consisting of passing in front of the extrusion nozzle a withdrawal device associated with at least one cutting member; said withdrawal device and said at least one cutting member are made to move independently of each other with velocities, in the sense of vectors, which differ from each other and differ in relation to the material portion separated.

Abstract: A method comprises compression-moulding plastics to obtain objects by a moulding apparatus, said moulding apparatus being provided with a punch device and with a die device, said die device comprising a die body and a bottom element mutually cooperating to define a portion of a forming cavity, said moulding comprising reciprocally moving said die device and said punch device, there being furthermore provided driving said bottom element independently of said punch device and of said die device; an apparatus for compression-moulding plastics to obtain objects comprises a die device provided with a die-body device and with a bottom-element device mutually cooperating to define a portion of a forming cavity device, fluid-operating means arranged to reciprocally move said bottom-element device and said die-body device and a passage device arranged to convey said fluid-operating means, said passage device comprising a throttle device.

Abstract: An apparatus comprising a transferring element for transferring a dose of flowable material, said dose being provided with an elongated body having a transverse dimension and an end zone, a receiving member for receiving said dose from said transferring element, wherein said transferring element comprising an end-forming arrangement for forming said end zone in such a way as to decrease said transverse dimension in the vicinity of said end zone. A dose of plastics comprises an elongated body provided with a transverse dimension, said elongated body comprising an end zone provided with a respective transverse dimension that is less than said transverse dimension.

Abstract: A method for separating a portion of extruded material from the continuous strip leaving an extruder, consisting of passing in front of the extrusion nozzle withdrawal means associated with at least one cutting means; said withdrawal means and said at least one cutting means are made to move independently of each other with velocities, in the sense of vectors, which differ from each other and differ in relation to the material portion separated.

Abstract: An apparatus comprises an extruding device arranged for supplying doses of pasty plastics, a moulding carousel provided with a mould device arranged for compression-moulding said doses to obtain objects and a thermal-conditioning carousel to thermally condition said objects; an apparatus comprises carousel arrangement, a conveying unit arrangement supported by said carousel arrangement and movable in relation to said carousel arrangement to move objects and a thermal-conditioning arrangement arranged for thermally conditioning said objects, said thermal-conditioning arrangement being associated with said conveying unit arrangement.

Abstract: An apparatus comprises: forming means movable along a first path for compression moulding doses of plastics; a plurality of transfer means for transferring said doses to said forming means; a plurality of arm means, each arm means being associated with a corresponding transfer means for moving said transfer means along a second path having a portion substantially coinciding with a further portion of said first path.

Abstract: Plant for forming predetermined quantities of synthetic material comprising a rotary turntable carrying on its periphery a plurality of dispensing devices, and means for feeding the material in the molten state to said dispensing devices; the plant also comprises a fixed part directly connected to the molten material feed, a rotary sealed joint connecting said fixed part to the rotary turntable, operating means for interacting with the dispensing devices positioned on the rotary turntable to operate them in the sense of opening and closing them in response to the rotations of the turntable, and means for rotating the turntable.

Abstract: For forming annular blanks, a device arranged to cut rings of predetermined thickness from an extruded tube of synthetic material comprising, above the exit mouth of the extruder, a movable body which supports at least one fixed rear knife and at least one knife movable between a working position in which it interacts with the inner edge of a portion of said tube and a rest position in which it is distant from said edge.