Patents by Inventor Alberto Navarra Pruna
Alberto Navarra Pruna has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11926083Abstract: The dating system for molds comprises a marking element (1) that engraves a determined date; wherein said marking element (1) comprises interchangeable inserts (2) indicating said determined date, said determined date being defined by letters and/or numbers, forming a line. It permits to obtain the advantages of: the reading of the information is much clearer than the traditional date stamps; it requires a minimum space, which allows to adapt it to practically any mold; and it is much more dynamic than traditional daters, as it can provide date information in multiple formats, such as day and month, or week and year number, or combinations thereof.Type: GrantFiled: November 5, 2020Date of Patent: March 12, 2024Assignee: COMERCIAL DE UTILES Y MOLDES, S.A.Inventor: Alberto Navarra Pruna
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Publication number: 20230347566Abstract: The safety device for injection molds comprises: a plate (1) attachable to a fixed part of a mold; a base (4) attachable to a movable part of a mold; wherein the base (4) comprises a safety shaft (10) movable between an unmounted position, wherein said safety shaft (10) is housed in a bore (13) of the plate (1), preventing displacement between the plate (1) and the base (4), and an assembled position, in which said safety shaft (10) is located outside the hole (13) of the plate (1), the displacement of the safety shaft (10) being driven by an actuator (7), allowing displacement between the plate (1) and the base (4). It ensures the connection of the two parts of the mold when the mold is not mounted on the injection molding machine.Type: ApplicationFiled: April 28, 2023Publication date: November 2, 2023Inventor: Alberto NAVARRA PRUNA
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Publication number: 20230256658Abstract: A slide assembly for injection molds includes a closing wedge, a slide body provided with a hole for at least partially housing said closing wedge, and a figure insert coupled to the slide body. The figure insert in the use position is vertically and horizontally movable with respect to the slide body. The slide assembly is both economical and simple.Type: ApplicationFiled: February 14, 2023Publication date: August 17, 2023Inventor: Alberto Navarra Pruna
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Patent number: 11345070Abstract: The device for demoulding negatives in thermoplastic injection moulds comprises an ejector (1) provided on one of the ends thereof with a figure insert (2) with a profile complementary to the part that is to be moulded, wherein said ejector (1) comprises an outer tube (11) housing an inner cooling tube (12), which cools said figure insert (2). It allows for a device to be provided for demoulding negatives in thermoplastic injection moulds which enables the part to be obtained to be cooled, the cooling circuit reaching the figure area of the mould.Type: GrantFiled: March 13, 2020Date of Patent: May 31, 2022Assignee: COMERCIAL DE UTILES Y MOLDES, S.A.Inventor: Alberto Navarra Pruna
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Publication number: 20220019202Abstract: The traceability system for injected parts comprises a traceability calendar (1) that indicates a date and time visibly placed on an injecting machine; a data control module (2) connected to the traceability calendar (1); and one or more date stamps (3) that mark the day and/or the month and/or the year on an injected piece. It allows providing a traceability system for injected parts that is sufficiently reliable and that facilitates or makes the task of changing the date of the date stamp as accurate as possible.Type: ApplicationFiled: July 14, 2021Publication date: January 20, 2022Inventor: Alberto NAVARRA PRUNA
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Patent number: 11161289Abstract: The device for the suction of air in injection molds and the subsequent expulsion of molded pieces has a Venturi ejector connected to a first valve, that when the mold is closed causes the suction of air in a mold cavity, having at least one insert made from porous material through which and by means of a communication duct that defines a suction circuit, and a second valve, that after the solidification of the plastic material, causes the air to be blown towards the at least one insert made of porous material, cleaning the at least one insert made of porous material. The volume of air to be reduced in the second part of the injection cycle with the same empirical value of 90% efficiency of the Venturi ejector.Type: GrantFiled: July 27, 2017Date of Patent: November 2, 2021Assignee: COMERCIAL DE UTILES Y MOLDES, S.A.Inventor: Alberto Navarra Pruna
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Publication number: 20210197422Abstract: The dating system for molds comprises at least one date stamp (12) connected to a knob (4) through a connection cable (1), wherein the date stamp (12) comprises an engraving formed only by numbers and/or letters and a position indicator. Furthermore, said knob (4) is mounted on a control block (2) comprising a reading engraving (3) located around said knob (4), in correspondence with the engraving of said date stamp (12). This makes it possible to manufacture date stamps with the information, without relief, since the simple contrast of the areas of the date stamp polished with high gloss and the nuanced numbers or letters, offer a visual contrast that allows clearly identifying the information that the date stamp must transmit.Type: ApplicationFiled: December 23, 2020Publication date: July 1, 2021Inventor: Alberto NAVARRA PRUNA
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Publication number: 20210129401Abstract: The dating system for molds comprises a marking element (1) that engraves a determined date; wherein said marking element (1) comprises interchangeable inserts (2) indicating said determined date, said determined date being defined by letters and/or numbers, forming a line. It permits to obtain the advantages of: the reading of the information is much clearer than the traditional date stamps; it requires a minimum space, which allows to adapt it to practically any mold; and it is much more dynamic than traditional daters, as it can provide date information in multiple formats, such as day and month, or week and year number, or combinations thereof.Type: ApplicationFiled: November 5, 2020Publication date: May 6, 2021Inventor: Alberto NAVARRA PRUNA
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Patent number: 10894347Abstract: A device for demolding parts includes a slider for housing a figure insert for the molding of a negative of the part to be molded. The slider is associated with a push rod, which can move the slider to an ejection position of a part to be molded. The device also includes a gas cylinder for driving the displacement of the push rod. The device eliminates an inclined guide and a safety wedge, saving a great deal of work and focusing all the machining only on a punch plate.Type: GrantFiled: January 18, 2017Date of Patent: January 19, 2021Assignee: COMERCIAL DE UTILES Y MOLDES, S.A.Inventor: Alberto Navarra Pruna
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Publication number: 20200290255Abstract: The device for demoulding negatives in thermoplastic injection moulds comprises an ejector (1) provided on one of the ends thereof with a figure insert (2) with a profile complementary to the part that is to be moulded, wherein said ejector (1) comprises an outer tube (11) housing an inner cooling tube (12), which cools said figure insert (2). It allows for a device to be provided for demoulding negatives in thermoplastic injection moulds which enables the part to be obtained to be cooled, the cooling circuit reaching the figure area of the mould.Type: ApplicationFiled: March 13, 2020Publication date: September 17, 2020Inventor: Alberto NAVARRA PRUNA
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Patent number: 10682794Abstract: A device for demolding negatives in thermoplastic injection molds includes an ejector which comprises an ejector profile for the fastening thereof to an ejector plate and a figure insert with a profile that is complementary to a piece to be molded. The ejector further comprises a flexible element arranged between the ejector profile and the figure insert which pushes the figure insert in order to demold the negative by an angular displacement and stretches the figure insert so as to return the ejector to the injection position thereof. The device eliminates the need for molding sliders which are costly as well as the need for a machining process for the installation thereof.Type: GrantFiled: March 8, 2018Date of Patent: June 16, 2020Assignee: Comercial De Utiles Y Moldes, S.A.Inventor: Alberto Navarra Pruna
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Publication number: 20180257280Abstract: The device for demolding negatives in thermoplastic injection molds includes an ejector (3), which comprises an ejector profile (5) for the fastening thereof to an ejector plate (2), and a figure insert (6) with a profile that is complementary to the piece (4) to be molded, wherein said ejector (3) further comprises a flexible element (7) arranged between the ejector profile (5) and the figure insert, which pushes said figure insert (6) in order to demold the negative by means of angular displacement and stretches said figure insert (6) so as to return the ejector (3) to the injection position thereof. It makes it so molding sliders are no longer necessary, hence, these spaces, the costly sliders, and the painstaking machining processes for the installation thereof in the molds are no longer required.Type: ApplicationFiled: March 8, 2018Publication date: September 13, 2018Inventor: Alberto NAVARRA PRUNA
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Publication number: 20180029271Abstract: The device for the suction of air in injection molds and the subsequent expulsion of molded pieces has a Venturi ejector connected to a first valve, that when the mold is closed causes the suction of air in a mold cavity, having at least one insert made from porous material through which and by means of a communication duct that defines a suction circuit, and a second valve, that after the solidification of the plastic material, causes the air to be blown towards the at least one insert made of porous material, cleaning the at least one insert made of porous material. The volume of air to be reduced in the second part of the injection cycle with the same empirical value of 90% efficiency of the Venturi ejector.Type: ApplicationFiled: July 27, 2017Publication date: February 1, 2018Inventor: Alberto NAVARRA PRUNA
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Publication number: 20170203481Abstract: A device for demolding parts includes a slider for housing a figure insert for the molding of a negative of the part to be molded. The slider is associated with a push rod, which can move the slider to an ejection position of a part to be molded. The device also includes a gas cylinder for driving the displacement of the push rod. The device eliminates an inclined guide and a safety wedge, saving a great deal of work and focusing all the machining only on a punch plate.Type: ApplicationFiled: January 18, 2017Publication date: July 20, 2017Inventor: Alberto Navarra Pruna
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Patent number: 9308681Abstract: The present invention relates to a device for demolding parts, comprising a skid (1) comprising a slide (8) for housing a shaping insert (2) for molding a negative (10) of the part to be molded, said slide (8) being obliquely associated with a pushrod (9) which can move said slide (8) to an ejection position for ejecting a part to be molded, and characterized in that said pushrod (9) comprises at the upper end thereof a rack (21) meshing with another rack (22) of said slide (8), the movement of said pushrod (9) being transferred to said slide (8) through said racks (21, 22). The invention allows reducing the volume with respect to the device described in the aforementioned document, such that it does not take up too much space when being assembled inside the shape of the mold.Type: GrantFiled: January 28, 2015Date of Patent: April 12, 2016Assignee: COMERCIAL DE UTILES Y MOLDES, S.A.Inventor: Alberto Navarra Pruna
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Patent number: 9238312Abstract: A plastic injection mold which allows extracting the air from inside it during the injection process, and an extraction method, where the mold includes closing means, one or more injection cavities provided with at least one injection nozzle for introducing the hot material in a liquid state and at least one ejector device formed by a housing for an ejector pin responsible for extracting the part already molded, where an air duct connected to a vacuum pump or a suction device intercepts the housings of the ejector pins causing a suction of the air from inside the mold.Type: GrantFiled: September 29, 2011Date of Patent: January 19, 2016Assignee: COMERCIAL DE UTILES Y MOLDES, S.A.Inventors: Alberto Navarra Pruna, Jorge de Fortuny Pala
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Publication number: 20150209989Abstract: The present invention relates to a device for demolding parts, comprising a skid (1) comprising a slide (8) for housing a shaping insert (2) for molding a negative (10) of the part to be molded, said slide (8) being obliquely associated with a pushrod (9) which can move said slide (8) to an ejection position for ejecting a part to be molded, and characterized in that said pushrod (9) comprises at the upper end thereof a rack (21) meshing with another rack (22) of said slide (8), the movement of said pushrod (9) being transferred to said slide (8) through said racks (21, 22). The invention allows reducing the volume with respect to the device described in the aforementioned document, such that it does not take up too much space when being assembled inside the shape of the mold.Type: ApplicationFiled: January 28, 2015Publication date: July 30, 2015Inventor: Alberto NAVARRA PRUNA
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Patent number: 9017062Abstract: A slide, like those used in injection molds, includes a closure unit with a first complementary profile complementary with the second complementary profile of a slide body, the complementary profiles being double wedge-shaped, where the double wedge has oblique end surfaces determining a fixed positioning and locked position between the closure unit and the slide body, such that the slide body includes a rail in the lower base coupleable to a slide guide on which the slide body slides.Type: GrantFiled: June 1, 2011Date of Patent: April 28, 2015Inventor: Alberto Navarra Pruna
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Publication number: 20140377398Abstract: A device for demolding parts, including a clamp movable between a molding position and a demolding position, where the clamp includes a side notch which, in the molding position, is in contact with a stop element, limiting the movement of said clamp. such that the device prevents the clamp from being locked inside its housing since the stop element prevents the upper surface of the clamp from being located below the upper surface of the mold.Type: ApplicationFiled: June 25, 2014Publication date: December 25, 2014Inventor: Alberto NAVARRA PRUNA
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Publication number: 20140147546Abstract: A device for demoulding pieces in a mould comprises a skid comprising a slider for housing a figure insert for moulding of a negative of the piece to be moulded, said slider being associated with a pushrod that can move said slider to an ejection position of a piece to be moulded pushing at least one ejection plate, and it is characterized in that said pushrod is placed substantially perpendicular with respect to said at least one ejection plate. Due to this substantially vertical arrangement of the pushrod the construction of the mould is simplified, minimizing the width needed for placing the device inside the mould.Type: ApplicationFiled: November 27, 2013Publication date: May 29, 2014Applicant: Commericial de Utiles Y Moldes, S.A.Inventor: Alberto Navarra Pruna