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

IPC: B29B7/74 ,  B29B7/76 ,  B29B7/80 ,  B29C44/36

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.

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

IPC: B29B7/76 ,  B29B7/74

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.

公开(公告)号：US11559920B2

公开(公告)日：2023-01-24

申请号：US16701945

申请日：2019-12-03

Applicant: AFROS S.P.A.

Inventor： Marco Volpato ,  Maurizio Corti ,  Fabio Fini ,  Luca Campi

IPC: B29B7/48 ,  B29B7/76 ,  F16J15/08 ,  B29B7/80 ,  F16J15/46 ,  B01F35/30

Abstract: A method for obtaining and applying a sealing gasket element on a slide-valve sliding in a cavity of an apparatus for the recirculation and mixing of chemically reactive polymeric components, comprises the steps of: obtaining from an elastic-plastic material a precursor element of the seal element, with a grid structure having a reticular shape; positioning the precursor element around the slide-valve; exerting on the precursor element, through temporary clamping elements, a radial compression and contraction action to insert it and couple it to one or more housing seats provided on the slide-valve so as to obtain the seal element well coupled to the latter; progressively removing the clamping elements to sequentially release successive parts of the gasket element and gradually free the slide-valve to gradually introduce the parts of the slide-valve—freed in succession—in the housing cavity allowing the sealing gasket element to gradually expand radially due to the elastic return by adhering tightly to the inner surface of the same housing cavity. The special equipment for fitting the sealing gasket element on the slide-valve and the so obtained recirculation and mixing apparatus is also described.

公开(公告)号：US20200180187A1

公开(公告)日：2020-06-11

申请号：US16701945

申请日：2019-12-03

Applicant: AFROS S.P.A.

Inventor： Marco Volpato ,  Maurizio Corti ,  Fabio Fini ,  Luca Campi

IPC: B29B7/48 ,  F16J15/08 ,  F16J15/46 ,  B29B7/76

Abstract: A method for obtaining and applying a sealing gasket element on a slide-valve sliding in a cavity of an apparatus for the recirculation and mixing of chemically reactive polymeric components, comprises the steps of: obtaining from an elastic-plastic material a precursor element of the seal element, with a grid structure having a reticular shape; positioning the precursor element around the slide-valve; exerting on the precursor element, through temporary clamping elements, a radial compression and contraction action to insert it and couple it to one or more housing seats provided on the slide-valve so as to obtain the seal element well coupled to the latter; progressively removing the clamping elements to sequentially release successive parts of the gasket element and gradually free the slide-valve to gradually introduce the parts of the slide-valve—freed in succession—in the housing cavity allowing the sealing gasket element to gradually expand radially due to the elastic return by adhering tightly to the inner surface of the same housing cavity. The special equipment for fitting the sealing gasket element on the slide-valve and the so obtained recirculation and mixing apparatus is also described.

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

IPC: B29C67/24 ,  B01F25/00 ,  B01F35/12 ,  B01F35/214 ,  B29C45/24 ,  B29C45/58

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.

公开(公告)号：US11904504B2

公开(公告)日：2024-02-20

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

IPC: B29B7/74 ,  B29B7/76 ,  B29B7/80 ,  B29C44/36

CPC classification number: B29B7/7404 ,  B29B7/7615 ,  B29B7/7657 ,  B29B7/7668 ,  B29B7/7684 ,  B29B7/801 ,  B29C44/365

Abstract: A device for mixing at high-pressure two or more reactive liquid components or resins includes 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; a valve member with longitudinal recirculation slots; the tubular element is removably inserted into a pass-through hole of the head-body, having 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 is provided such that the forces are exchanged through the annular shoulder zone; sealing and centering elements avoid leakages of polymeric mixture. Deformation-detecting elements detect the deformation conditions which the tubular element is subjected.