• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    SEALING MOLD CLAMP FOR SEALING A FIXING INTERFACE BETWEEN A SUBSTRATE AND A LAMINATED COVER, SEALING MOLD CLAMPING FOR SEALING A FIXING INTERFACE BETWEEN A SUBSTRATE AND A LAMINATED COVER, AND SEALING METHOD BETWEEN A SUBSTRATE AND A ABOULATED LID of a sealing mold to seal a curved plate unit with nut, in particular, in a lower region around an interface fixed in an adhesive manner with a substrate, such as an aviation fuel tank wall. The sealing mold is formed by a light plastic material, and includes an internal cover in combination with an external skirt, to define a gap or trough to accommodate and support a metered amount of a curable sealing material. The mold is placed on a vault of the nut-plate unit, with an inner edge of the inner cover seated on a vault shoulder. The outer skirt is then moved downward around the seated inner cover to extrude the sealing material around the lower region of the nut plate unit, in particular, such as the interface adhesive-bonded to the substrate. The sealing material (...).
    公开号:BR112013021817B1
    申请号:R112013021817-7
    申请日:2012-02-28
    公开日:2021-02-02
    发明作者:Charles G. Hutter Iii；John M. Cortez
    申请人:Physical Systems, Inc.；
    IPC主号:
    专利说明:

    Fundamentals of the Invention
    This invention generally relates to a sealing mold for use with a domed plate-nut unit, or the like, for sealing a bottom part of the nut-plate unit, particularly as an adhesive-mounted interface with a substrate against exposure to undesirable fluids and the like. More particularly, this invention relates to an improved sealing mold and respective method of use, in which the bottom part of a curved plate unit with nut, or the like, is effectively sealed with minimal added weight.
    Curved plate units with nut, and the like, are generally known in the art, where a plate with nut, or other selected fastening device, is encased within a curved element, or dome, to avoid contact with fluids present on one side of the dome . The fastener device is usually mounted on a selected substrate, such as the wall of an aviation fuel tank, or the like, in which to prevent leakage of fluid, such as aviation fuel, or the like, through a screw opening of the substrate , or similar, aligned with the nut plate. In the past, such curved plate-with-nut units were mounted on the substrate by means of rivets. More recently, as described in U.S. Patents 5,013,791 and 5,304,747 (which are incorporated by reference in this document), adhesive assembly techniques have been developed to assemble the plate with a domed nut on the substrate.
    In an aviation fuel tank environment, it may be highly desirable to seal the mounting interface between a domed plate-nut unit and a substrate. In a rivet-mounted plate-nut unit, such sealing can be critical in preventing unwanted fuel from leaking out of a fuel tank. In an adhesive-mounted plate unit with nut, sealing may be important to prevent undesirable degradation of the fixing material. In any case, it is highly desirable to provide a sealant material of sufficient thickness and to apply that sealant material very carefully to avoid any microporosities or voids, which may allow fuel and / or water inside the jet fuel tank to leak through the sealant. and cause corrosion on the rivets and / or attack the adhesive material. However, in a modern aircraft environment, it is also important to note that the weight added to the aircraft for use in sealing the mounting interface may be undesirable, due to its negative impact on total fuel efficiency.
    In the past, various molding devices have been proposed and used to apply the sealant over a curved plate unit with nut, or the like, in which that sealant material is cured in a relatively resistant and elastic state, which is substantially immune to attack or contamination due to contact with fuel and / or water inside the jet fuel tank. However, existing mold devices generally apply an additional amount of sealant material to cover substantially the entire nut plate unit within the fuel tank, and these mold devices are not adapted for convenient removal after the sealant has cured. Therefore, the excess amount of sealing material, in combination with non-removable mold devices, contributes to undesirable weight gain to the aircraft.
    The present invention overcomes these problems and disadvantages, by means of an improved sealing mold, designed to apply a curable sealing material only to a part of a curved plate unit with nut, or the like, in a location that surrounds its substrate fixing interface, such as a wall of an aviation fuel tank, or the like, and where the improved seal mold is removable quickly and easily after curing of the seal material. Summary of the Invention
    In accordance with the invention, a sealing mold is provided to seal a curved plate unit with a lid, or the like, particularly in a respective lower region around an interface between the nut plate unit and a substrate, such as a wall of an aviation fuel tank, or the like. The sealant mold is formed from a lightweight plastic material and includes an inner lid in combination with an outer skirt to define a gap, or gutter, to accommodate and support a metered amount of a curable sealant. The mold is placed on a protective vault of the nut-plate unit, or the like, with an inner edge of the inner cover seated on a vault shoulder. The outer skirt is then moved downward around the inner cap seated towards the substrate, to extrude the sealing material around the lower region of the nut-plate unit, particularly as its attachment interface with the substrate. The sealing material is allowed to cure, after which the sealing mold, including the inner cover and outer skirt, can be removed quickly and easily from the cured seal material. with nut was designed for adhesive fixation to the substrate, with a cord of cured adhesive material surrounding or circumscribing a screw passage, or similar, in the substrate to accommodate a threaded screw or similar, for secure fixation in the plate unit with nut. In a preferred alternative form, the domed plate with nut unit is designed for alternative fixation to the substrate, such as by means of one or more rivets. In any case, the vault of the nut-plate unit overlaps and protects against the penetration of corrosive fluids, such as jet fuel and / or water, when the nut-plate unit is mounted on the wall of a fuel tank aviation.
    In a preferred form of the invention, the seal mold supports the curable seal material within an annular chamber formed therein. A lower end of this annular chamber is defined by a series or plurality of passages, through which, the sealing material can be fed, as by means of an annular plunger, or the like, at an upper end of the annular chamber.
    The sealing mold of the present invention applies the curable sealing material only around the attachment region of the nut-plate unit interface with the substrate. That is, the sealing mold applies the curable sealing material, to extend in a substantially sealed relationship between the substrate and the vault, in a position overlying and / or surrounding the region of fixation interface. In this sense, a minimum relative amount of curable sealing material is used, thus minimizing the aircraft's weight gain attributable to the sealing material. In addition, the sealing mold, including the inner cover and the outer skirt, is formed from a plastic material suitable for easy extraction of the cured seal material, in addition to minimizing the total weight gain of the aircraft. It should be noted that the cured sealant effectively prevents fluid attack and failure resulting from an adhesive-mounted fixation interface. Alternatively, the cured sealing material effectively prevents fluid attack and failure resulting from rivets, or the like, used to secure the curved plate unit with nut.
    Other features and advantages of the invention will become more evident from the detailed description below, taken in conjunction with the accompanying drawings, which illustrate, by way of example, the principles of the invention. Brief Description of Drawings
    The accompanying drawings illustrate the invention. In such drawings: Figure 1 is an exploded perspective view of a sealing mold, including an inner cover and an outer skirt shown in exploded relation with a curved plate unit with nut, mounted in an adhesive manner; Figure 2 is a fragmentary perspective view, showing the inner lid and outer skirt of the sealing mold in inverted relation, in combination with partial filling of an underlying gap with a metered amount of a curable sealing material; Figure 3 is an inverted perspective view of the sealing mold partially filled with the curable sealing material and, furthermore, showing a peelable film covering the underlying gap; Figure 4 is a fragmentary perspective view, showing the domed plate-nut unit of Fig. 1, adhesive-mounted on a selected substrate and, furthermore, illustrating the sealing mold of the present invention mounted on a plate-nut vault ; Figure 5 is a fragmentary perspective view similar to Fig. 4, but showing the downward displacement of the outer skirt in relation to the inner cover of the sealing mold; Figure 6 is a fragmentary perspective view similar to Figure 5, and depicting the dismembered seal mold to illustrate the extrusion of the seal material around a lower region of the nut-plate unit; Figure 7 is a fragmented and exploded perspective view, showing the removal of the sealing mold from the domed plate-with-nut unit, leaving the sealant material cured around a lower region of the plate-with-nut unit; Figure 8 is a fragmentary perspective view, showing a preferred alternative form of the sealing mold in exploded relation with a domed plate with nut unit; Figure 9 is a fragmentary vertical cross-sectional view of the alternative embodiment of Figure 8, and showing a division representation, from left to right, of the downward displacement of the outer skirt in relation to the inner cover of the sealing mold, for extruding the sealing material around a lower region of the nut-plate unit; Figure 10 is a fragmentary perspective view similar to Fig. 7, and illustrating the removal by detaching the sealing mold from the domed plate-with-nut unit, leaving the sealant material cured around a lower region of the nut-plate unit ; Figure 11 is a fragmentary perspective view, showing another alternative preferred embodiment of the invention; Figure 12 is a fragmentary perspective view, showing the alternative embodiment of Figure 11 with its outer skirt displaced downwards, to extrude the sealing material around a lower region of a domed plate with nut unit; Figure 13 is a fragmentary perspective view, showing another alternative preferred embodiment of the invention; Figure 14 is a fragmentary perspective view similar to Figure 13, but showing the partial assembly of the sealing mold on a curved plate unit with nut; and Figure 15 is another fragmentary perspective view, illustrating the separation by lifting the sealing mold from an underlying curved plate unit with nut, or the like, and its cured sealing material. Detailed Description of Preferred Forms of Realization
    As shown in the exemplary drawings, a curved plate unit with nut 10, or the like (Figures 1, 4 and 6-7), mounted on a selected substrate 12 (Figs. 4-7), is effectively and relatively quickly sealed , by means of a curable sealant material 14 (Figs. 2-7) applied by a sealant mold 16 (Figs. 1-7) of the present invention. The sealing material 14, when cured, is applied in a limited amount and a layer of controlled thickness, but substantially minimal and uniform, to coat and firmly cover a fastening interface between the domed plate unit with nut 10, or similar, and substrate 12. That is, the cured sealing material effectively seals between substrate 12 and a vault 18 (Figs. 4, 6 and 7) of the plate unit with nut 10, or similar, to safeguard the sealed fixing interface against leakage of fluid or degradation. After the sealing material is substantially and completely cured, the sealing mold 16 of the present invention is removed quickly and easily from the cured sealing material 14 (Fig. 7), in which the fixing interface is effectively sealed and protected with a minimum of general use. of the sealant and resulting weight gain.
    The curved plate unit with nut 10, or the like, is usually installed on one, so-called, blind side of the substrate 12, to position a threaded nut (not shown), or the like, in a position generally aligned with a screw opening , or similar, to accommodate a threaded shaft (also not shown) passed through the screw opening, in threaded engagement with the plate with nut. In a hostile environment, such as when substrate 12 includes a wall of an aviation fuel tank, or the like, the vault 18 of the nut plate unit 10 is shown in a generally cylindrical profile shape and is designed to overlap and protecting the plate with an inner nut from unwanted contact with a corrosive fluid, or similar, such as fuel and / or water inside a nut tank 10 can be conventionally mounted inside the fuel tank on substrate 12, by means of small rivets , or the like, or, alternatively and more preferably, the curved plate unit with nut 10 can be mounted on the fuel tank wall, using a cord or curable adhesive material 20 (Figs. 4 and 6), as shown and described in U.S. Patents 5,013,391 and 5,304,747, which are incorporated by reference in this document.
    The sealing mold 16 and the respective installation method of the present invention effectively coat or seal a blind side of the fastening interface between the curved plate unit with nut 10, or the like, and the substrate 12 to prevent unwanted fuel leaks, or the like, passing through this fixation interface, and also to prevent undesirable degradation or attack by corrosive fuel and / or water inside the cord fuel tank or cured adhesive material 20 used to fix the domed plate unit with nut 10 on the substrate 12.
    A preferred sealing material comprises a polysulfide sealant. An exemplary sealing material is provided by PPG Aerospace, division of PPG Industries, Pittsburgh, PA, under the product designation PR 1440. An alternative exemplary sealing material is provided by the same company under the product designation PR 1422.
    Fig. 1 shows a curved plate unit with exemplary nut 10, in exploded relation, with a preferred embodiment of the sealing mold 16 of the present invention. As shown, the illustrative seal mold 16 comprises a generally cylindrical inner cap 22 mounted with an outer skirt 24. The outer skirt includes a generally cylindrical upper segment 26, sized for displacement with relatively narrow sliding fit along an upper region of the cylindrical cap. inner 22. From that upper segment 26, the outer skirt 24 includes an outwardly extended lower segment 28 ending in a comparatively larger outer or lower annular ring 30. Fig. 2 shows these components mounted in an inverted orientation, for defining a downwardly extending annular chute or void 32, which is partially filled with a metered amount of the sealant material 14 in uncured form, through an appropriate dispenser 34, or the like. It should be noted that the amount of sealing material 14 applied to that chute will either avoid filling the chute or go 32 completely to the rim 30, so that the sealant material 14 does not come into contact with unwanted surfaces.
    Fig. 3 shows a peelable film 36 of the type disclosed in U.S. Patent 8,038,823, which is incorporated by reference in this document. This peelable film 36 is shown as a thin layer or transparent film, covering the lower end of the assembled components 22, 24 of the sealing mold 16, with the metered amount of sealing material 14 contained within the gutter or void 32, in relation to spaced from the peelable protective film 36. As shown, the film 36 may include a suitable pressure-sensitive adhesive layer 38 on one side to temporarily secure the film 36 on the rim 30 of the enlarged bottom of the outer skirt 24, and also to secure the film 36 to a lower end of the inner cover 22.
    In this configuration, as shown in Figure 3, the entire sealing mold 16 containing the metered amount of uncured sealing material 14 can be cooled and, preferably, frozen to prevent the sealing material 14 from curing prematurely. When the sealing mold 16 with sealing material 14 contained therein is ready for use, the entire assembly can be heated quickly or slowly to thaw the sealing material 14 to a relatively viscous, but fluid state.
    Fig. 4 shows the application or installation of the sealing mold 16 with the sealing material 14 contained therein over a curved plate unit with nut 10, or similar, and the respective vault 18, which was previously installed on a substrate 12. The illustrative nut plate 10 comprises the adhesive-mounted nut plate unit, the cord or substantially cured adhesive material 20 securing the nut plate unit 10 to the blind side of substrate 12, where that substrate 12 can include a wall aviation fuel tank, or the like. The peelable film 36 (Fig. 3) is manually removed from the sealing mold 16, to accommodate the installation of the sealing mold on the curved plate unit with nut 10, as shown in Fig. 4.
    The inner cap 22 of the seal mold 16 fits snugly but slidably over the vault 18 of the nut plate unit 10, with a lower end and radially flanged out 40 of the inner cylindrical cap 22 seated and substantially sealant with a radially enlarged lower shoulder 42 on the vault 18, close to the cord or adhesive material 20. In this position, with the lower end 40 of the inner cover 22 seated on the lower shoulder 42 of the vault 18, the outer skirt 24 is then displaced downwards towards the substrate 12 to cause the upper segment 26 to slide along the inner cover 22 to extrude the sealing material 14 downwards around the fixing interface. More particularly, when the outer skirt 24 is moved along the inner cover 22, the segment of the enlarged lower end 28 of the outer skirt 24 pushes the uncured sealing material 14 downward, in the form of an extruded film of substantially uniform thickness, surrounding or circumscribing the interface of
    权利要求:
    Claims (11)
    [0001]
    1. SEALING MOLD CLAMPS, for sealing a fastening interface between a substrate (12, 312) and an element (18, 3180 mounted on a substrate (12,312), characterized by the fact that said sealing mold clamp comprises: sealing mold ( 16, 316) having an outer skirt (24, 324) joined, at its lower end, to a segment widened down at an angle (28, 328), which ends in an outer ring (30, 330) having a size and shape for circumscribing the fixing interface, said sealing mold (16, 316) still including an inner cover (22, 322) supported by said outer skirt (24, 324), said inner cover (22, 322) having a size and shape to accommodate the reception with sliding adjustment of the element (18, 318) and the dosage quantity of a curable sealing material (14, 314) in uncured form, partially filling the space between said inner cover (22, 322) and said outer skirt (24, 324); said sealing mold outer ring (30, 330) being substituted settable on the substrate (12, 312) in a position that circumscribes the fixing interface, through which the sealing material (14, 314) is applied to seal between the substrate (12, 312) and the element (18, 318) ).
    [0002]
    2. SEALING MOLDER HOLDER, according to claim 1, characterized by the fact that said sealing mold (16, 316) is formed of a plastic-based material, to avoid permanent adhesion to the cured sealant material (14, 314) and the fact that said outer skirt (24, 324) of sealing mold (16, 316) is movable in a sliding way in relation to said inner cover (22, 322), towards the substrate (12, 312), after said outer sealing mold ring (30, 330) to be seated on it to feed the sealing material (14, 314) to seal between the substrate (12, 312) and the element (18, 318).
    [0003]
    3. SEALING MOLDER HOLDER, according to claim 1, characterized by the fact that said inner cover (322) cooperates with said outer skirt (324) to define a chamber (350) between them, to accommodate said dosed quantity of said sealing material (314), said chamber (350) having a lower end defined by a wall (354), which has a plurality of passages (356) formed therein, and a plunger (358) housed within an upper end of said chamber (350), after said sealing material (314) is received inside, said plunger (358) being movable towards the substrate (312), after said external seal mold ring (330) is therein seated to feed sealing material (314) to seal between the substrate (312) and the element (318).
    [0004]
    4. SEALING MOLDER HOLDER, according to claim 1, characterized by the fact that said sealing mold (316) is separated from said sealing material (314), after curing, and by the fact of said inner cover (322) of the sealing mold having a relatively small opening (345) formed therein, and also including a compressed gas medium selectively coupled in said opening (345), to separate said sealing mold (316) from said sealing material (314), after the cure of it.
    [0005]
    5. SEALING MOLD CLAMP, to seal a fixing interface between a substrate (12, 312) and an element (18, 318) mounted on the substrate (12, 312), characterized in that said seal mold clamp comprises: mold sealant (16, 316) having an outer skirt (24, 324) joined, at its lower end, to a segment widened down at an angle (28, 328), which ends in an outer ring (30, 330) having a size and format to circumscribe the fixation interface; said sealing mold (16, 316) further including an inner cover (22, 322) supported by said outer skirt (24, 324), said inner cover (22, 322) having a size and shape to accommodate the sliding fit host element (18, 318); and metered amount of a curable sealant material (14, 314) in uncured form partially filling the space between said inner cap (22, 322) and said outer skirt (24, 324); said outer ring (30, 330) of sealing mold being substantially settable on the substrate (12, 312) in a position that circumscribes the fixing interface; said sealing mold outer skirt (24, 324) being movable with respect to said inner cover (22, 322), after said sealing mold outer ring (30, 330) is seated on the substrate (12, 312) to feed the sealing material (14, 314) for sealing between the substrate (12, 312) and the element (18, 318); said sealing mold (16, 316) being separable from said sealing material (14, 314), after curing thereof.
    [0006]
    6. SEALING MOLD CLAMP to seal a fixing interface between a substrate (312) and an element (318) mounted on the substrate (312), characterized in that said seal mold clamp comprises: seal mold (316) having a skirt outer (324) joined, at its lower end, to a segment widened downwards at an angle (328), which ends in an outer ring (330) having a size and shape to circumscribe the fixing interface; said sealing mold (316) still including an inner cover (322) supported by said outer skirt (324), said inner cover (322) having a size and shape to accommodate the sliding fit of the element (318); and metered amount of a curable sealing material (314) in uncured form, partially filling the space between said inner cap (322) and said outer skirt (324); said outer ring (330) of a substantially settable sealing mold on the substrate (312) in a position that circumscribes the fixing interface; said inner cover (322) cooperating with said outer skirt (324) to define a chamber (350) between them, to accommodate said metered quantity of said sealant material (314), said chamber (350) having a lower end defined by a wall, which has a plurality of passages (356) formed therein, and a plunger (358) received within an upper end of said chamber (350), after said sealing material (314) is received inside it, said piston (358) being movable towards the substrate (312), after said outer ring (330) of sealing mold is seated therein to feed the sealing material (314) to seal between the substrate (312) and the element ( 318); said seal mold (316) being separable from said seal material (314), after curing thereof.
    [0007]
    7. SEALING METHOD BETWEEN A SUBSTRATE AND AN ELEMENT ASSEMBLED IN THE SUBSTRATE, characterized by the fact that said method comprises the steps of: forming a sealing mold (16, 316) having an outer skirt (24, 324) joined at its lower end , to a segment widened downwards at an angle (28, 328), which ends in an outer ring (30, 330) having a size and shape to circumscribe the fixing interface, said seal mold (16, 316) still including a cover inner (22, 322) supported by said outer skirt (24, 324), said inner cap (22, 322) having a size and shape to accommodate the sliding fit of the element (18, 318); partially filling the space between the outer skirt (24, 324) of sealing mold and the inner cover (22, 322) of sealing mold with a curable sealing material (14, 314) in uncured form; lay the outer ring (30, 330) of a sealing mold on the substrate (12, 312), in a position that circumscribes the fixing interface, through which the sealing material (14, 314) is applied to seal between the substrate and the element (18, 318); and separating the sealing mold (16, 316) from the sealing material (14, 314), after curing.
    [0008]
    8. METHOD, according to claim 7, characterized by the fact that said forming step comprises the formation of the sealing mold (16, 316) from a plastic-based material, to avoid permanent adhesion to the cured sealing material ( 14, 314).
    [0009]
    9. METHOD, according to claim 7, characterized in that said forming step comprises the formation of the outer skirt (24, 324) of a sealing mold, to be slidably movable in relation to the inner cover (22, 322) , and also include the step of slidingly moving the outer skirt (24, 324) of a sealing mold over the inner cover (22, 322) towards the substrate (12, 312), after the outer ring (30, 330) of sealing mold to be seated therein to feed the sealing material (14, 314) to seal between the substrate (12, 312) and the element (18, 318).
    [0010]
    10. METHOD, according to claim 7, characterized in that said formation stage comprises the formation of the inner cover (322) to cooperate with the outer skirt (324), to define a chamber (350) between them, to accommodate the metered amount of the sealing material (314), the chamber (350) having a lower end defined by a wall (354), which has a plurality of passages (356) formed therein, and a plunger (358) housed within one end top of the chamber (350), after the sealing material (314) is received inside, and also includes the step of moving the plunger (358) towards the substrate (312), after the outer ring (330) of sealing mold be seated on it to feed the sealing material (314) to seal between the substrate (312) and the element (318).
    [0011]
    11. METHOD, according to claim 7, characterized by the fact that said step of separating the sealing mold (316) from the sealing material (314), after curing it, comprises separation by lifting, and by the fact of said step of The formation further comprises forming the inner cover (322) of a sealing mold with a relatively small opening (345) formed therein, and further comprising said coupling step comprising coupling of compressed gas medium in the opening (345) of the inner cover for separation by lifting the sealing mold (316), the sealing material (314), after curing it.
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    同族专利:
    公开号 | 公开日
    WO2012161845A1|2012-11-29|
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    US20120217673A1|2012-08-30|
    BR112013021818A2|2016-10-25|
    EP2679020B1|2016-02-24|
    US8616868B2|2013-12-31|
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    BR112013021818B1|2020-12-08|
    CA2827995A1|2012-11-29|
    EP2679020A4|2014-06-18|
    JP2014510883A|2014-05-01|
    JP5897610B2|2016-03-30|
    EP2679020A1|2014-01-01|
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    法律状态:
    2018-12-18| B06F| Objections, documents and/or translations needed after an examination request according art. 34 industrial property law|
    2019-10-22| B06U| Preliminary requirement: requests with searches performed by other patent offices: suspension of the patent application procedure|
    2020-11-24| B09A| Decision: intention to grant|
    2021-02-02| B16A| Patent or certificate of addition of invention granted|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 28/02/2012, OBSERVADAS AS CONDICOES LEGAIS. |
    优先权:
    申请号 | 申请日 | 专利标题
    US13/406,453|2011-02-27|
    US201161447557P| true| 2011-02-28|2011-02-28|
    US61/447,557|2011-02-28|
    US13/406,453|US8616868B2|2011-02-28|2012-02-27|Sealant mold fixture for a domed cap|
    PCT/US2012/027005|WO2012161845A1|2011-02-27|2012-02-28|Sealant mold fixture for a domed cap|
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