Abstract:
An apparatus comprises an extruding device (2) having a dispensing opening (8) for extruding a flowable material along an exit direction (Z1) through said dispensing opening (8), and cutting means (3) for separating a dose (50) from said flowable material, said cutting means (3) being movable with a motion component that is parallel to said exit direction (Z1) .
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:
An apparatus comprises: forming means (21) movable along a first path (P3) for compression moulding doses of plastics; a plurality of transfer means (50) for transferring said doses to said forming means; a plurality of arm means (41), each arm means being associated with a corresponding transfer means for moving said transfer means along a second path (P2) having a portion substantially overlapping with a portion of said first path.
Abstract:
An apparatus comprises a first mould part (24; 124) suitable for receiving an object (1), die means (25; 125) arranged for surrounding a zone (5) of said object and a second mould part (26; 26a; 126) cooperating with said die means (25; 125) and with said first mould part (24; 124) so as to compression-mould plastics on said object (1) in said zone (5).
Abstract:
An apparatus comprises: forming means (21) movable along a first path (P3) for compression moulding doses of plastics; a plurality of transfer means (50) for transferring said doses to said forming means; a plurality of arm means (41), each arm means being associated with a corresponding transfer means for moving said transfer means along a second path (P2) having a portion substantially overlapping with a portion of said first path.
Abstract:
The invention comprises a rotating transfer machine (40), arranged outside the path (P3) of the die cavities, having a plurality of transfer chambers (50) carried in continuous rotation, each adapted for containing a polymeric body (D) and for transferring it to a cavity of a die (21), and having means for moving the transfer chambers (50) along a same path (P2) so that this path (P2) has a portion (T1) overlapping with the path (P3) of the dies, during which each transfer chamber (50) is vertically aligned and synchronously moving above a corresponding cavity of a die (21), the transfer of the polymeric body (D) to the cavity of the die (21) being carried out in portion (T1). A relatively long path and thereby a correspondingly long time are provided for transferring polymeric bodies from the transfer chambers (50) to the die cavities, for carrying out and effective and correct transfer of the polymeric bodies into the die cavities, starting from a dispensing outlet of the extruder of the polymeric material, also in the case that such body has a relatively large mass.
Abstract:
An apparatus comprises a first mould part (24; 124) suitable for receiving an object (1), die means (25; 125) arranged for surrounding a zone (5) of said object and a second mould part (26; 26a; 126) cooperating with said die means (25; 125) and with said first mould part (24; 124) so as to compression-mould plastics on said object (1) in said zone (5).
Abstract:
An apparatus comprises: - forming means (17) that is movable along a path (P3) for compression moulding of doses (50) of plastics; - transferring means (27) for transferring said doses (50) to said forming means (17); - liquid cooling means for cooling said transferring means (27); - arm means (41; 141; 241; 341) associated with said transferring means (27) for moving said transferring means (27) along a further path (P2) having a portion (T2) substantially coinciding with a further portion (T2) of said path (P3).
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. In the mold, the matrix comprises at least one deformable wall (31) whose inner surface defines at least part of the inner surface of the matrix part intended to give form to the hollow body of the preform, 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 preform molding step, thereby varying the thickness of the hollow body.
Abstract:
A method comprises compression-moulding plastics to obtain objects (9) by mould means (2), said mould means (2) being provided with punch means (11; 111) and with die means (31, 32; 131, 132), said die means (31, 32; 131, 132) comprising a die body (31; 131) and a bottom element (32; 132) mutually cooperating to define a portion of a forming cavity, said moulding comprising reciprocally moving said die means (31, 32; 131, 132) and said punch means (11; 111), there being furthermore provided driving said bottom element (32; 132) independently of said punch means (11; 111) and of said die means (31, 32; 131, 132); an apparatus for compression-moulding plastics to obtain objects (9) comprises die means (3) provided with die-body means (31; 131) and with bottom-element means (32; 132) mutually cooperating to define a portion of forming cavity means, fluid-operating means (24) arranged to reciprocally move said bottom-element means (32; 132) and said die-body means (31; 131) and passage means arranged to convey said fluid-operating means, said passage means comprising throttle means (27).