Abstract: The mould comprises a punch (10) having an outer surface (11?) arranged to engage the container tubular body (51) as an exact fit, and an end portion (13) projecting axially from the lower end of the cylindrical outer surface (11 ?), and a die (30) arranged to form, in combination with the lower surface (13?) of the punch, a cavity (F) for forming the headpiece (52) of the container; the die (30) has a concave surface (32?) arranged to receive as an exact fit, by axial penetration, the lower end of the cylindrical outer surface (11?) of the punch together with the lower end of the tubular body (51) of the container. The headpiece (52) is formed within the forming cavity (F).

Abstract: A cap for closing a container comprises a liner adhering to a wall of said cap, said liner comprising an annular zone suitable for engaging an edge of said container and an internal region arranged inside said annular zone, said liner furthermore comprising connecting path arrangement between said annular zone and said internal region.

Abstract: The preform is formed by an upper neck which maintains unchanged its form in the final object and a hollow body, joined to the neck. The method foresees the insertion, within a matrix cavity, of a metered body of polymeric material whose mass is metered according to a reference value, and the subsequent pressure insertion of a punch within the matrix cavity until it closes the mold's molding chamber, the punch conferring the shape to the inner surface of the preform and the matrix having an inner surface which confers the shape to the outer surface of the preform. According to the invention, in the molding of the preform, the error of the mass of the metered body with respect to the reference value is distributed in the hollow body, which undergoes a subsequent hot deformation until it achieves the final shape.

Abstract: The mold comprises a matrix (30) and a punch (20) adapted to penetrate into the cavity of the matrix to determine the molding chamber of the mold, the object being formed through the pressure insertion of the punch (20) within the cavity of the matrix (30) where a metered body (8) of polymeric material has been previously placed whose mass is metered according to a reference value. According to the invention, the matrix (30) comprises at least one deformable wall (31) whose inner surface defines at least part of the surface of the matrix (30), said deformable wall (31) having, at least in part, a relatively thin thickness which permits it to be elastically deformed under the pressure of the polymeric material in the final molding step of the object, thereby absorbing the error of the mass of the metered body (8) with respect to the reference value.

Abstract: An apparatus comprises a forming arrangement closable in a direction to form an object, said forming arrangement comprising at least two reciprocal movable elements along respective arched trajectories to disengage from said object, said arched trajectories having respective components parallel to said direction.

Abstract: The unit operates by coupling together under pressure a punch (11) and a die with its closed cavity loaded with a charge of polymer material, the charge being produced outside the die and then inserted into the die cavity. The unit comprises a mould having a lower die part arranged to form the lower part of the outer surface of the article, the inner surface (30a) of which comprises a lower end portion and an axially extending lateral portion. The lower die part (30) comprises a first constituent member (31) and a second constituent member (32) having inner surfaces (33, 34) which can be complementarily aligned to together define the inner surface (30a) of the lower die part (30); the inner surface (34) of the second constituent member (32) defines totally or to a large extent said lower end portion of the inner surface of the lower die part (30).

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: The plant comprises a plurality of shuttles (10) each carrying at least one die part (110), the shuttles being conveyed in a moulding apparatus (20) which is provided with a plurality of punches and a corresponding plurality of seats (21) for holding the shuttles (10), the seats arranged to receive and release the shuttles (10),the moulding apparatus comprising means for inserting the punches into the die cavities (11, 12) of the shuttle and means for withdrawing the punches to achieve a compression moulding cycle for the article. The shuttles (10) are independent of the moulding apparatus. Each shuttles (10)comprises at least one circuit (15) for at least one conditioning fluid for controlling the temperature of the article located in the die, the moulding apparatus (20) comprising at least one feed system (25) for at least one conditioning fluid to feed the conditioning fluid to the shuttles (10) inserted in the seats (21) of the moulding apparatus (20).

Abstract: An apparatus for manufacturing hollow, plastics articles having internal undercuts, comprising at least one compression-molding unit, composed of an upper male mold part comprising a plug and of a lower female mold part aligned, with the male mold part, an actuation for actuating the mold parts between a spaced position, at which a dose of plastics is deposited in the female mold part, and an adjacent, compression molding position, a slideable tube, having an end portion with angularly distributed seats with oscillating elements articulated along radial planes, provided externally with recesses, a stem accommodated coaxially inside the tube, that actuates during the mold closure, the oscillating elements to form, with the tube end portion, the molding plug, and, during the mold opening a position in which to allow the extractor to remove articles from the plug.

Abstract: The apparatus serves for compression moulding performs (9) for synthetic resin containers by inserting under pressure a mould punch (15) into a die cavity (20a) loaded with a charge (8), the preforms (9) comprising an upper neck (91) provided with projections and a hollow body (92) lying below the neck (91). The apparatus comprises a plurality of first die components (21), each arranged to form the outer surface of the hollow body (92) of the perform (9), and being operated by inserting said punch (15) underpressure into each of them, to compression mould the perform (9). An equal plurality of second die components (22) are provided, each arranged to form the outer surface of the neck (91), each being associated with and secured to the first die component (21), said second component (22) being divided into at least two sectors (23) to be drawn apart to extract the preform (9).

Abstract: The mould comprises a punch (10) having an outer surface (11?) arranged to engage the container tubular body (51) as an exact fit, and an end portion (13) projecting axially from the lower end of the cylindrical outer surface (11 ?), and a die (30) arranged to form, in combination with the lower surface (13?) of the punch, a cavity (F) for forming the headpiece (52) of the container; the die (30) has a concave surface (32?) arranged to receive as an exact fit, by axial penetration, the lower end of the cylindrical outer surface (11?) of the punch together with the lower end of the tubular body (51) of the container. The headpiece (52) is formed within the forming cavity (F).

Abstract: A mould for moulding plastics items formed by two half-moulds movable between a closing position and an opening position, said closing position defining a cavity (24) for forming the plastic item and said opening position allowing the removal of the moulded item, apertures (23) being arranged in the surface (25, 26) of the forming cavity (24) of one half-mould (1), said apertures (23) communicating with the source (41) of compressed air when said mould is open, in such a way to prevent the formation of a vacuum between said item and said surface from being generated and cause detachment of said item from said surface (25, 26).

Abstract: Method for forming articles of synthetic material by compression moulding, comprising the following operative stages: inserting a first measured quantity of synthetic material in the plastic state into the cavity of a mould comprising a punch with which it defines a first forming chamber for said measured quantity; pressing said measured quantity to obtain a first portion of the article; opening the mould and inserting a second measured quantity into said cavity; closing the mould by repositioning the punch relative to said cavity to define a second forming chamber; pressing said second measured quantity and again opening the mould, then extracting said article from the punch.

Abstract: An apparatus for manufacturing plastics items provided with external undercuts, comprising at least one compression molding unit, which is composed of an upper male mold part comprising a plug and of a lower female mold part aligned, along a vertical axis, with the male mold part, means for actuating the mold parts between a spaced position, at which a dose of plastics sufficient to form an item is deposited in the female mold part, and a mating position for producing the compression molding of an item, the male mold part comprising a plug and an ejector that is associated with the plug in order to remove the molded item when the mold parts are in the spaced position, further comprising a bushing that is arranged externally and coaxially to the plug, a plurality of sectors for forming raised portions and undercuts on the outer surface of the item, the sectors being coupled axially to the bushing and being able to expand with respect to the plug, means for actuating the sectors between a position that produces

Abstract: An apparatus for manufacturing hollow articles made of plastics having internal undercuts, comprising at least one compression-molding unit (S), which is composed of an upper male mold part (1) which comprises a plug (15) and of a lower female mold part (2) which is aligned, along a vertical axis, with the male mold part (1), means for actuating the mold parts (1, 2) between a spaced position, at which a dose of plastic material sufficient to mold an article is deposited in the female mold part (2), and a mutually adjacent position, in order to produce the compression molding of an article, the male mold part (1) comprising a plug, which can slide in a sleeve (34) that constitutes an extractor (36) associated with the plug in order to remove the molded article when the mold parts are in the spaced position, the apparatus comprising a tube (30) which can slide in the sleeve (34), a stem (3) which is accommodated coaxially inside the tube (30), the tube (30) having an end portion (32) provided with angularly di

Abstract: A device for manufacturing, in particular, plastic caps for closing containers, comprising molding units, each of which is composed of a male mold part and of a female mold part. The male mold part has a punch which is directly provided with compressed air which exits through ports, so as to cause the separation of the cap from the punch and facilitate the removal of the cap.

Abstract: An apparatus for manufacturing threaded caps comprises a plurality of compression molding assemblies which are arranged on a rotating carousel and comprise an upper male mold half and a lower female mold half. The male mold half comprises a tubular element, a sleeve guided coaxially to said tubular element, and a punch guided in the tubular element and having a helical slot for forming the thread of the cap. The punch enters the female mold half and produces, together with it, the cap through compression of a dose of plastic material deposited in the female mold half. After the spacing of the punch from the female mold half, the removal of the cap from the punch occurs by way of a removal device, which comprises a ring gear associated with the sleeve and provided with a collar in sliding contact on the punch, a rod which can slide axially in a seat of the carousel and supports a gear meshing with the ring gear and connected to a motor drive mechanism.

Abstract: An apparatus for manufacturing plastics items provided with external undercuts, comprising at least one compression molding unit (S), which is composed of an upper male mold part (1) comprising a plug (15) and of a lower female mold part (2) aligned, along a vertical axis, with the male mold part (1), means for actuating the mold parts (1, 2) between a spaced position, at which a dose of plastics sufficient to form an item is deposited in the female mold part (2), and a mating position for producing the compression molding of an item, the male mold part (1) comprising a plug (15) and an ejector (3, 9) that is associated with the plug in order to remove the molded item when the mold parts are in the spaced position, characterized in that it comprises a bushing (36) that is arranged externally and coaxially to the plug (15), a plurality of sectors (48) for forming raised portions (F) and undercuts (G) on the outer surface of the item, the sectors (48) being coupled axially to the bushing (36) and being able to