Abstract:
The invention concerns a device for molding a plastic material article whereby the article is obtained by compressing a dose of molten plastic material (3) between two parts of a mold, comprising at least one plastic material supply (1), a rod (11) sliding in a dowel bush (8) for temporarily supporting said dose of plastic material (3), an article head mold (6, 7), a mandrel (18) co-operating with said mold (6, 7). The invention is characterized in that it comprises non-elastic retaining means (12-14,23,24) for limiting the two-way movement of the rod (11) in the dowel bush (8). The invention also concerns a method using said device.
Abstract:
An apparatus for moulding plastics comprises mould means (3; 4), actuating means (15) arranged to move said mould means (3; 4) e shock-absorbing means (17) interposed between said actuating means (15) and said mould means (3, 4), said actuating means (15) comprising electromechanical actuating means (26; 46; 62); an apparatus for moulding plastics comprises mould means (3; 4) and actuating means (15) arranged to move said mould means (3; 4), said actuating means (15) comprising electromechanical actuating means (26; 46; 62) provided with electric motor means (41; 58; 47; 77) and with control means for controlling an electrical parameter of said electric motor means (41; 58; 47; 77); an operating machine comprises a plurality of actuating devices (15) suitable for operating operating means (1), at least one control unit (18) for controlling said actuating devices (15) and switching means (23) arranged to selectively connect said at least one control unit (18) to at least actuating device (15a, 15b, 15c, 15d, 15e) of said plurality of actuating devices (15).
Abstract:
Method for forming mutilayered articles of synthetic material by compression moulding. The method is implemented by an apparatus comprising a plurality of forming units (3), and at least one device (5', 5") for feeding in succession at least two measured quantities (100, 201) of synthetic material in the plastic state to each of said forming units (3, 43, 81), each of said forming units comprising an upper half-mould (9) provided with at least one punch (110, 46) and a lower half-mould comprising at least one die (29, 70, 90, 91) provided with a cavity matching said at least one punch (110, 46), means being provided to align said at least one die with said at least one punch in succession and to drive said die along an alignment axis, and means which collaborate with said at least one punch and said at least one die in such a manner as to define at least two different forming chambers.
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. The method is implemented by a plant comprising a plurality of forming units (3), and at least one device (5', 5") for feeding in succession at least two measured quantities (100, 201) of synthetic material in the plastic state to each of said forming units (3, 43, 81), each of said forming units comprising an upper half-mould provided with at least one punch (110, 46) and a lower half-mould comprising at least one die (29, 70, 90, 91) provided with a cavity matching said at least one punch (110, 46), means being provided to align said at least one die with said at least one punch in succession and to drive said die along the alignment axis, and means which collaborate with said at least one punch and said at least one die in such a manner as to define at least two different forming chambers.
Abstract:
Atelier de fabrication de tubes souples (5) comportant une jupe (1) et une tête munie d'un goulot et d'une épaule reliant ledit goulot à ladite jupe, ledit atelier comportant une première zone étant affectée à la fabrication desdites jupes, une deuxième zone étant affectée à la fabrication des tubes souples, une troisième zone étant affectée au parachèvement des tubes souples ainsi réalisés, un premier moyen de transfert (100), transférant en mouvement continu lesdites jupes de ladite première zone vers ladite deuxième zone, et un second moyen de transfert (300) transférant, en un mouvement continu synchronisé avec le précédent, lesdits tubes de ladite deuxième zone vers ladite troisième zone. La deuxième zone comprend un troisième moyen de transfert (10) transférant les poinçoins (210) en un mouvement continu synchronisé avec celui du premier moyen de transfert (100) et avec celui du deuxième moyen de transfert (300), des moyens de chargement (280), chargeant les jupes (1) sur les poinçons (210), associés au mouvement synchronisé desdits premier et troisième moyens de transfert, et des moyens de déchargement, libérant les poinçons (210) des tubes (5) qui les coiffent, associés au mouvement synchronisé desdits deuxième et troisième moyens de transfert.
Abstract:
In a method of injection moulding, a solid thermoplastic material (R) is subjected to a stroke whose energy brings it to a molten or flowable state, and is led into a mould cavity (12), in which the material is solidified and is given a shape defined by the mould cavity. The thermoplastic material (R) is pressed in the impact space against a solid counter surface, i.e. an anvil, from which it is led along a feed channel or channels (11) into the mould cavity (12).
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) under pressure 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). According to the method of the invention, during the step of feeding the charge into the die cavity the second die component is associated with the first die component, said second component being divided into at least two sectors able to be drawn apart to extract the preform.
Abstract:
An apparatus for molding and inserting in caps liners, comprising a dosage carousel (6), a molding carousel (8), an insertion carousel (9), and a cap feeder (10) for feeding said insertion carousel with caps (2), said carousels being provided with seats (66) for supporting multiple shuttles (13), the dosage carousel (6) being provided with assemblies (39) for taking doses (M) of plastic material from an extruder (3) and depositing them onto the shuttles (13), the molding carousel (8) being provided with assemblies for molding liners (1) on the shuttles (13) and the insertion carousel being provided with assemblies for removing the liners (1) from the shuttles (13) and inserting them in respective caps (2) fed by the feeder (10), a first star (14) for transferring the shuttles from the dosage carousel (6) onto the molding carousel (8), a second star (15) for transferring the shuttles from the molding carousel onto the insertion carousel (9), and a third star (16) for transferring the shuttles (13) from the insertion carousel (9) onto the dosage carousel (6).
Abstract:
The container for packaging is made from a thermoplastic plastic and is coated in the region of the inner surface thereof, such that a release of components contained within the plastic into the product packed in the container is prevented or at least significantly reduced. The coating can be applied by means of a plasma coating. The device for the production of preforms and the method for production of containers is essentially based on a direct coupling of a reactor for production of the plastic to an injection moulding device for the production of preforms. The preforms are then moulded to give the container by a blow forming process and the inner surface thereof is then provided with the coating.