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公开(公告)号：US20200307024A1
公开(公告)日：2020-10-01
申请号：US16828513
申请日：2020-03-24
Applicant: AFROS S.P.A.
Inventor： Marco Volpato , Maurizio Corti , Fabio Fini , Luca Campi , Samuele Zampini
Abstract: A device for mixing at high-pressure two or more reactive liquid components or resins comprises a head-body provided with a mixing chamber with inlet and outlet openings for the injecting and recirculating reactive components; a single-piece tubular element, for delivering the mixture, communicates, through an intermediate transversal hole with the mixing chamber and slidingly houses a cleaning member; a valve member with longitudinal recirculation slots slides in the mixing chamber between a backward position, in which the inlet openings are released, and an advanced position, in which the inlet openings are put in communication with the respective outlet openings for recirculating the respective reactive components; the tubular element is removably inserted into a pass-through hole of the head-body, transversal to the mixing chamber, and it has an annular shoulder zone, separated and distant from the transversal hole; fixing elements removably lock the annular shoulder zone at the head-body for holding the tubular element in the aforesaid hole; a clearance gap between the tubular element and the pass-through hole of the head-body limits the contact area among them and minimizes the exchange of forces inside the hole; when the valve member is in the advanced position and penetrating into the hole of the tubular element, a gap, with a sealing element interposed, separates it from the aforesaid hole; between the surface of a cap and a second hole on the tubular element—obtained in a position opposite to the hole—a respective gap is defined and an elastic sealing is interposed; the aforesaid gaps are provided such that the connecting and engagement forces transmitted between the tubular element, the head-body and the spacer chamber are exchanged through the annular shoulder zone; sealing and centering elements keep the tubular element axially centred and separated from the hole by means of the gap, avoiding the direct contact between the respective cylindrical surfaces, and avoid leakages of polymeric mixture towards the clearance gap; similarly the sealing elements make it possible to avoid leakages of reacting polymeric mixture and to insert the front part of the valve element keeping a gap, i.e. without direct metal contact with the transversal hole, and to assemble the front cylindrical part of the cap keeping a gap, not in direct metal contact with the respective surface of the housing cylindrical hole; this prevents a coupling with metal-on-metal contact between the respective cylindrical surfaces from transmitting engagement forces between the tubular delivery element and the head-body. Deformation-detecting elements detect locally the deformation conditions which the tubular element is submitted to due to friction, scraping and bonding forces exchanged between the cleaning member and the inner surface of the delivery duct, enabling to monitor the working conditions of the self-cleaning mixing device.
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2.发明授权公开(公告)号：US11034812B2
公开(公告)日：2021-06-15
申请号：US16019929
申请日：2018-06-27
Applicant: AFROS S.P.A.
Inventor： Marco Volpato , Maurizio Corti
IPC: B29B7/00 , C08J9/12 , B29B7/74 , B29C44/34 , B01F3/04 , B01F13/02 , B01J3/00 , B01J19/18 , C08G18/42 , B29K75/00 , C08G101/00
Abstract: The invention concerns an apparatus (1) for the dispersion of an expansion gas even in supercritical conditions, e.g. carbon dioxide, in a reactive resin, of the kind in which a reaction chamber having an input (27) for gas and an input (37) for resin is provided. Advantageously, the chamber is a dispersion and containment chamber made into a casing (2) of predetermined high resistance susceptible to sustain high pressure and is divided into two sections (6,7) by a head (14) of a dispersion and mixing cylinder-piston group (4) in fluid communication between themselves by means of at least one pouring passage (31, 36, 32, 39) provided with a static mixer (38), motor means (3) being provided for piston (34) control of said mixing cylinder-piston group (4). The invention also concerns a process for the formation of a polyurethane foam starting with the dispersion of carbon dioxide, even supercritical, in a reactive resin in which at least one initial dispersion and mixing controlled phase of the two components is provided in a dispersion and containment chamber under pressure divided into two sections (6,7) by a head (14) of a cylinder-piston mixing group (4) in fluid communication between themselves by means of at least one pouring passage (31, 36, 32, 39) provided with a static mixer (38) and in which adduction, dispersion and mixing occurs under high pressure (at least greater than 75 bar).
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公开(公告)号：US20210001525A1
公开(公告)日：2021-01-07
申请号：US16915770
申请日：2020-06-29
Applicant: AFROS S.P.A
Inventor： MARCO VOLPATO , MAURIZIO CORTI
Abstract: The invention relates to a high-pressure mixing, dosing and recirculation head for injection or casting reaction molding, said high-pressure mixing, dosing and recirculation head comprising a head body, a mixing chamber, obtained in the head body wherein a valve element or mixing valve slides and in fluid communication with a supply duct, and a self-cleaning element comprising a scraping portion, said self-cleaning element being structured to slide in said supply duct, as well as comprising an apparatus for controlling and commanding mixing, supply and recirculation comprising a plurality of sensors and transducers mounted on board of the head body and of the components parts of the head connected thereto to detect and transform representative physical quantities of at least one operational status of said high-pressure mixing, dosing and recirculation head into electrical signals and an electronic control and storing system adapted to synchronously control and scan said sensors and transducers and adapted to receive and process said electrical signals indicative of said at least one operational status, at the beginning and during the operational phases of said high-pressure mixing, dosing and recirculation head to compare them with each other and with electrical signals representative of a predetermined reference operational status. The invention also relates to a high-pressure mixing, dosing and recirculation method for injection or casting reaction molding.
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公开(公告)号：US09308512B2
公开(公告)日：2016-04-12
申请号：US14178505
申请日：2014-02-12
Applicant: AFROS S.P.A.
Inventor： Carlo Fiorentini , Maurizio Corti
CPC classification number: B01J19/0073 , B01J2219/00761 , B29B7/7663 , B29B7/7668 , B29B7/7684 , B29B7/80 , B29B7/805 , B29C44/1271 , B29C67/246 , B29K2075/00
Abstract: A method for forming a self-regenerating seal in a mixing chamber of a high-pressure mixing apparatus for polymeric components suitable for providing a reactive mixture for a polymerizable resin. An annular sealing element is provided in a circular housing seat inside the mixing chamber, in a sealing zone downstream the injection holes for the polymeric components; worn and/or torn parts of the annular sealing element are automatically regenerated by the same reactive mixture delivered during operation of the mixing apparatus. A high-pressure mixing apparatus with self-regenerating sealing element is also claimed.
Abstract translation: 一种用于在用于提供可聚合树脂的反应混合物的聚合物组分的高压混合装置的混合室中形成自再生密封的方法。 环形密封元件设置在混合室内的圆形壳体座中，在用于聚合物组分的注入孔下游的密封区域中; 环形密封元件的磨损和/或撕裂部分由混合装置操作期间输送的相同反应混合物自动再生。 还要求具有自再生密封元件的高压混合设备。
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公开(公告)号：US12042955B2
公开(公告)日：2024-07-23
申请号：US17224435
申请日：2021-04-07
Applicant: AFROS S.P.A.
Inventor： Marco Volpato , Maurizio Corti , Luca Campi
Abstract: A method is disclosed for preparing and dispensing a mixture obtained by mixing at least one first chemically reactive component and at least one second chemically reactive component containing a dispersed solid material by a high pressure mixing device comprising a mixing chamber for mixing the components, in which a valve member is slidable, in particular a slide-valve, provided with longitudinal slots for recirculating the components to respective storage tanks. The method provides removing from at least one tank, a dosed quantity of the at least second chemically reactive second component to with filler material is added; recirculating the second component through the slots of the slide-valve for a period of time that is comparatively very reduced with respect to a recirculating step of the at least first component through the slide-valve. An apparatus for preparing and dispensing the mixture is also disclosed.
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Patent Agency Ranking
公开(公告)号：US11433567B2
公开(公告)日：2022-09-06
申请号：US16826631
申请日：2020-03-23
Applicant: AFROS S.p.A.
Inventor： Marco Volpato , Maurizio Corti , Giorgio Molteni , Fabio Fini
Abstract: A high-pressure mixing device adapted to form a polymeric mixture from the reaction of two or more reactive liquid components or resins, comprises a head-body with a mixing chamber having an inner cylindrical surface with inlet and outlet openings for injecting and recirculating reactive components; a duct for delivering the mixture, a valve body with recirculation longitudinal slots; the delivery duct, of the self-cleaning type, is a single-piece tubular element, insertable into a hole passing through the head-body, having an intermediate transversal hole aligned with the mixing chamber with a diameter greater than a diameter of the mixing chamber for avoiding protrusions of the walls of the transversal hole from forming inwardly of the mixing chamber of the head-body. Sealing elements duly arranged between the coupling interfaces of the various components prevent the leakage of polymeric mixture and lubricant liquid. There is also disclosed a related method.
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公开(公告)号：US20200307025A1
公开(公告)日：2020-10-01
申请号：US16826631
申请日：2020-03-23
Applicant: AFROS S.p.A.
Inventor： Marco VOLPATO , Maurizio CORTI , Giorgio MOLTENI , Fabio FINI
Abstract: A high-pressure mixing device adapted to form a polymeric mixture from the reaction of two or more reactive liquid components or resins, comprises a head-body provided with a mixing chamber having an inner cylindrical surface with inlet and outlet openings for injecting and recirculating reactive components; a duct for delivering the mixture, communicating with the mixing chamber; a valve body with recirculation longitudinal slots, sliding into the mixing chamber between a backward position in which it clears the inlet openings and enables to mix components, and an advanced position, in which the slots put inlet openings in communication with outlet openings for recirculating the reactive components; the delivery duct, of the self-cleaning type, is a single-piece tubular element, removably fastened—by means of fixing members—and can be inserted into a hole transversal to the mixing chamber passing through the head-body; the tubular element has an intermediate transversal hole aligned with the mixing chamber with a diameter greater than a diameter of the mixing chamber for compensating, while assembling, for possible inevitable errors of alignment and mutual positioning due to processing tolerances of the parts to be coupled and for avoiding protrusions of the walls of the transversal hole from forming inwardly of the mixing chamber of the head-body, protrusions that might interfere with the end the walls of the valve member during the movement in the hole passing through the thickness of the tubular element until the end of said hole leading into the delivery chamber and that extends the mixing chamber to the wall of the self-cleaning delivery duct. Between the tubular element and the pass-through hole in the head-body a gap is defined, i.e. a certain coupling tolerance with a clearance between the tubular element and the hole, enabling to insert and remove the tubular element into/from the pass-through hole. Sealing elements prevent the leakage of polymeric mixture and lubricant liquid in the aforesaid gap; analogously, between the surface of the cap and the second hole—obtained in a opposite position with respect to the hole—a respective gap with clearance is defined where an elastic or elasto-plastic sealing is interposed; the valve member, in the advanced and penetrating position into the hole of the tubular element, is separated therefrom by a gap, with a sealing member interposed therebetween; the gap prevents the metal-on-metal contact on the front part of the valve element when it enters into the intermediate hole; generally, thanks to gaps, the assembly and coupling of respective components is eased, facilitating the centering and mutual angular positioning thereof and avoiding undesired interferences; the sealing elements prevent the leakage of polymeric mixture and possible lubricant liquid in the respective aforesaid gaps.
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8.发明申请公开(公告)号：US20190152169A1
公开(公告)日：2019-05-23
申请号：US16184643
申请日：2018-11-08
Applicant: Afros S.p.A.
Inventor： Marco VOLPATO , Alberto BONANSEA
Abstract: The invention relates to an apparatus for fine and controlled adjustment of an injection molding process and a related industrial process.The apparatus (1) has a sealed mold (2) supplied with fluid reactive resin via a supply inlet (8) and by means of a mixing and injection head (9) so as to impregnate with said resin fibers of composite material loaded inside a cavity (6) of the mold (2) and wherein at least one storage container (10) having an inlet/outlet opening (11) in fluid communication with an outlet (13) of said injection head (9) is provided so as to store a predefined quantity of fluid resin inside a storage chamber (16) prior to completion of the injection phase. Advantageously, the storage container (10) is a cylinder (18) defining internally a storage chamber (16) which houses slidably inside it a plunger (21) operated by an actuator (25) configured as a cylinder/piston assembly arranged as a coaxial extension of said cylinder (18) and comprising an actuating piston (15) having a stem (22) coinciding with the stem of said plunger (21); the cylinder (18) of the storage chamber (16) and the cylinder (14) of said actuator (25) having cross-sections different from each other.
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公开(公告)号：US10040040B2
公开(公告)日：2018-08-07
申请号：US14580573
申请日：2014-12-23
Applicant: AFROS S.P.A.
Inventor： Marco Volpato , Maurizio Corti
Abstract: A method and high-pressure mixing device for co-injection of polymeric reactive components, in particular for polyurethane and epoxy mixtures. The polymeric components are supplied in a common pressure chamber where they flow at a same pressure and in an unmixed state into a forwardly converging fore portion of the pressure chamber, and through a settable co-injection orifice to be co-injected, in the unmixed state, into a mixing chamber transversely oriented to the pressure chamber. The settable co-injection orifice consists in an elongated restriction that longitudinally extends on a side wall of the mixing chamber orthogonally oriented to an intersecting the forwardly converging fore portion of the pressure chamber; a first cleaning member and a second cleaning member are sequentially reciprocable in the pressure chamber to eject the remaining unmixed polymeric components, respectively in the mixing chamber to eject the remaining mixture, and stop elements are provided to set an open section of the elongated restriction, by adjustably stopping the fore end of the cleaning member for the mixing chamber, in respect to the same elongated restriction of the co-injection orifice.
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公开(公告)号：US20240116254A1
公开(公告)日：2024-04-11
申请号：US18378070
申请日：2023-10-09
Applicant: Afros S.p.A.
Inventor： Marco Volpato , Maurizio Corti , Fabio Fini
CPC classification number: B29C67/246 , B01F25/105 , B01F35/122 , B01F35/214 , B29C45/24 , B29C45/581 , B01F2101/2805 , B01F2215/0431
Abstract: The present invention relates to a spacer for high pressure mixing head comprising a control cylinder flange, a head body flange, and a plurality of uprights adapted to interconnect the control cylinder flange and the head body flange. At least one of the plurality of uprights comprises at least one deformation detection sensor applied at at least one available deformation surface thereof and adapted to detect longitudinal deformations and/or transversal deformations of the at least one of the plurality of uprights. The present invention also relates to a related mixing and dosing head and to a related apparatus.
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