ES2566367T3 - Sealing mold fixing for a dome-shaped lid - Google Patents

Abstract

A sealing mold attachment for sealing a bonding interface between a substrate (312) and a dome (318) mounted on the substrate, said sealing mold attachment comprising: a sealing mold (316) having a skirt outer (324) attached at a lower end thereof to a downwardly angled flared segment (328) terminating in an outer rim (330) having a size and shape to circumscribe the bonding interface; said sealing mold also including an inner cap (322), carried by said outer skirt (324), said inner cap having a size and shape to accommodate slip-fit receipt of the dome (318); and a metered amount of a curable sealing material (314) in uncured form partially filling the space between said inner lid (322) and said outer skirt (324); said sealing mold outer rim (330) being able to be positioned substantially on the substrate (312) in a position circumscribing the bonding interface through which the sealing material (314) is applied to seal between the substrate (312) and the dome (318); and said sealing mold (316) being separable from said sealing material (314) after curing thereof, characterized in that said inner lid (312) cooperates with said outer skirt (324) to define a chamber (350) between said same for receiving said metered amount of said sealing material, said chamber (350) having a lower end defined by a wall (354) having a plurality of passages (356) formed therein, and a plunger (358) received therein. an upper end of said chamber (350) after said sealing material (314) is received therein, said plunger (358) being movable toward substrate (312) after said sealing mold outer rim (330 ) is placed on it to supply the sealing material (314) to seal between the substrate (312) and the dome (318).

Description

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DESCRIPTION

Sealing mold fixing for a dome-shaped lid Background of the invention

The present invention relates generally to a sealing mold for use with a dome-shaped brake washer unit or the like for sealing a lower portion of the brake washer unit, particularly such as an interface mounted on Adhesive form with a substrate against exposure to undesirable fluids and the like. More particularly, the present invention relates to an improved sealing mold and a related method of use, in which the lower portion of a dome-shaped brake washer unit or the like is effectively sealed with a minimum weight addition. .

Dome-shaped brake washer units and the like are generally known in the art, in which a clamping device selected from a brake washer or another is enclosed within a dome or dome element to prevent contact with fluids. present on one side of the dome. The fastening device is typically mounted on a selected substrate, such as the wall of an aviation fuel tank or the like, in which the dome is also intended to prevent fluid leakage, such as aviation fuel through a substrate bolt hole or the like aligned with the brake washer. In the past, said dome-shaped brake washer units have been mounted on the substrate by rivets. More recently, as described in U.S. Pat. UU. 5,013,791 and 5,304,747, adhesive mounting techniques have been developed for mounting the dome-shaped brake washer on the substrate.

In an aviation fuel tank environment, it may be highly desirable to seal the joint interface between a dome-shaped brake washer unit and a substrate. In a brake washer unit mounted with rivets, said sealing can be critical in preventing undesirable fuel leaks outside a fuel tank. In an adhesive washer mounted brake washer unit, sealing may be important to avoid undesirable degradation of the bonding material. In any case, it is highly desirable to provide a sealing material of sufficient thickness and apply this sealing material with great care to avoid any hole or hole, which otherwise may allow the fuel and / or water inside the fuel tank. Aviation fuel leaks beyond the sealant and causes rivet corrosion and / or attack the adhesive material. However, in a modern aviation environment, it is also important to note that the additional weight added to the aircraft for use in the sealing of the junction interface may be undesirable due to its negative impact on the overall fuel efficiency.

In the past, various mold devices have been proposed and used for the application of sealing material on a dome-shaped brake washer unit or the like, in which this sealing material is cured to a relatively hard and rubbery state. which is substantially impervious to attacks or contamination due to contact with fuel and / or water inside the aviation fuel tank. However, existing mold devices generally apply an excess amount of sealing material to substantially cover the entire brake washer unit within the fuel tank, and these mold devices are not adapted for convenient removal after curing of the sealing material Consequently, the excess amount of sealing material in combination with non-removable mold devices contributes to the addition of unwanted weight to the aircraft. US 2009/005710 discloses a sealing mold fixation in accordance with the preamble of claim 1.

The present invention overcomes these problems and disadvantages by providing an improved sealing mold designed to apply a curable sealing material only to a portion of a dome-shaped brake washer unit or the like, in a position surrounding the joint interface. thereof with a substrate, such as a wall of an aviation fuel tank or the like, and also in which the improved sealing mold is removable quickly and easily after curing of the sealing material.

Summary of the invention

The invention is defined in claims 1 and 7. Optional features are indicated in the dependent claims. In a described arrangement, a sealing mold is provided for sealing a dome-shaped brake washer unit or the like, particularly in a lower region thereof on an interface between the brake washer unit and a substrate, such as a wall of an aviation fuel tank or the like. The sealing mold is formed from a lightweight plastic material, and includes an inner lid in combination with an outer skirt to define a hole or channel to receive and support a metered amount of a curable sealing material. The mold is placed on a protection dome of the brake washer unit or the like, with an inner edge of the inner cover placed on a dome shoulder. The outer skirt then moves down on the inner cover placed in a direction towards the substrate to extrude the sealing material on the lower region of the brake washer unit, particularly such as the interface of connection thereof with the substratum. The sealing material is allowed to cure, after which the mold of

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Sealing that includes the inner cover and the outer skirt can be quickly and easily separated from the cured sealing material.

The dome-shaped brake washer unit may be designed for adhesive bonding to the substrate, with a cured adhesive cord that surrounds or circumscribes a bolt passage or the like in the substrate to receive a threaded bolt or the like for fixing. safe to the brake washer unit. In one arrangement, the dome-shaped brake washer unit is designed for alternative securing to the substrate, such as by one or more rivets. In any case, the brake washer unit dome covers and protects against intrusion of corrosive fluids, such as aviation fuel and / or water when the brake washer unit is mounted on the wall of a fuel tank. aviation.

In a preferred embodiment, the sealing mold carries the curable sealing material within an annular chamber formed therein. A lower end of this annular chamber is defined by a matrix or plurality of passages, through which the sealing material can be supplied as by means of an annular plunger or the like at an upper end of the annular chamber.

A described sealing mold that performs the present invention applies the curable sealing material only around the joint region of the brake washer interface unit with the substrate. That is, the sealing mold applies the curable sealing material to extend in substantially sealed relationship between the substrate and the dome, in a position that covers and / or circumscribes the region of joint interface. Accordingly, a relative minimum amount of curable sealing material is used, thereby minimizing the weight gain of the aircraft attributable to the sealing material. In addition, the sealing mold that includes the inner cover and the outer skirt is formed of a suitable plastic material to facilitate removal by detachment of the cured sealing material to further minimize the weight gain of the general aircraft. Importantly, the cured sealing material effectively prevents a fluid attack and the failure resulting from a bonding interface mounted in an adhesive manner. Alternatively, the cured sealing material effectively prevents a fluid attack and the resulting failure of rivets or the like that are used to join the dome-shaped brake washer unit.

Other features and advantages of the invention will be more apparent from the following detailed description, taken in conjunction with the accompanying drawings 13 to 15, which illustrate, by way of example, the principles of the invention.

Brief description of the drawings

The attached figures 13 to 15 illustrate the invention. In said drawings, Figures 1 to 12 refer to embodiments that do not fall within the scope of the claims.

FIGURE 1 is an exploded perspective view of a sealing mold that includes an inner cover and an outer skirt shown in exploded relation with a dome-shaped brake washer unit mounted with adhesive;

FIGURE 2 is a fragmented perspective view showing the inner lid and outer skirt of the sealing mold in inverted relationship, in combination with the partial filling of a bottom recess 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 also represents a detachable film covering the lower gap;

FIGURE 4 is a fragmented perspective view showing the dome-shaped brake washer unit of FIG. 1, adhesively mounted on a selected substrate, and further illustrating the sealing mold of the present invention fixed in a dome of a brake washer;

FIGURE 5 is a fragmented perspective view similar to FIG. 4, but showing the downward displacement of the outer skirt in relation to the inner lid of the sealing mold;

FIGURE 6 is a fragmented perspective view similar to FIG. 5, and representing the separate sealing mold to illustrate the extrusion of the sealing material over a lower region of the brake washer unit;

FIGURE 7 is a fragmented and exploded perspective view showing the removal of the seal mold from the dome-shaped brake washer unit, leaving the cured sealing material on a lower region of the brake washer unit;

FIGURE 8 is a fragmented perspective view showing a seal mold in exploded relation with a dome-shaped brake washer unit;

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FIGURE 9 is a fragmented vertical sectional view of an arrangement of FIG. 8, and showing a representation of the left-right division of downward movement of the outer skirt in relation to the inner cover of the sealing mold to extrude the sealing material over a lower region of the brake washer unit;

FIGURE 10 is a fragmented perspective view similar to FIG. 7 and illustrating the pressure removal of the sealing mold of the dome-shaped brake washer unit, leaving the sealed sealing material on a lower region of the brake washer unit;

FIGURE 11 is a fragmented perspective view showing a further alternative preferred embodiment;

FIGURE 12 is a fragmented perspective view showing the alternative embodiment of FIG. 11 with an outer skirt thereof displaced downwards to extrude the sealing material over a lower region of a dome-shaped brake washer unit;

FIGURE 13 is a fragmented perspective view showing an embodiment of the invention;

FIGURE 14 is a fragmented perspective view similar to FIG. 13, but showing the partial assembly of the sealing mold in a dome-shaped brake washer unit; Y

FIGURE 15 is another fragmented perspective view illustrating the detachment of the seal mold from an underlying dome-shaped brake washer unit or the like or the related cured sealing material.

Detailed description of preferred embodiments

As shown in the exemplary drawings, a dome-shaped brake washer unit 10 or the like (FIGURES 1, 4 and 6-7) mounted on a selected substrate 12 (FIGS. 4-7) is sealed with efficiency and relatively quickly by means of a curable sealing material 14 (FIGS. 2-7) applied by means of a sealing mold 16 (FIG. 7). The sealing material 14, once cured, is applied in a limited amount and a layer of controlled thickness, but substantially minimal and uniform to safely coat and coat a joint interface between the dome-shaped brake washer unit 10 or the like and the substrate 12. That is, the cured sealing material effectively seals between the substrate 12 and a dome 18 (FIGS. 4, 6 and 7) of the brake washer unit 10 or the like to protect the interface of sealed joint against degradation or fluid leakage. After the sealing material is substantially completely cured, the sealing mold 16 of the present invention is quickly and easily removed from the cured sealing material 14 (FIG. 7), thus the bonding interface is sealed and effectively protected with a minimum of general purpose sealant and resulting weight gain.

The dome-shaped brake washer unit 10 or the like is typically installed on an asf called a blind side of the substrate 12 to position a threaded nut (not shown) or the like in a position generally aligned with a bolt hole or the like to receive a threaded shaft (also not shown) that passes through the threaded coupling bolt hole with the brake washer. In a hostile environment, such as when the substrate 12 comprises a wall of an aviation fuel tank or the like, the dome 18 of the brake washer unit 10 is shown in a generally cylindrical profile shape and is designed to cover and protect the internal brake washer against unwanted contact with a corrosive fluid or the like, such as fuel and / or water inside an aviation fuel tank. The dome-shaped brake washer unit 10 can be mounted conventionally inside the fuel tank on the substrate 12 by means of small rivets or the like, or alternatively and more preferably, the shaped brake washer unit of dome 10 can be mounted on the wall of the fuel tank by means of a cord or curable adhesive material 20 (FIGS. 4 and 6) as shown and described in US Pat. UU. 5,013,391 and 5,304,747.

The sealing mold 16 and the related installation procedure effectively cover or seal a blind side of the joint interface between the dome-shaped brake washer unit 10 or the like and the substrate 12, to prevent unwanted leakage of fuel or the like beyond this bonding interface, and also to prevent unwanted degradation or attack by corrosive fuel and / or water within the fuel tank of the cured or cured adhesive material 20 used to fix the brake washer unit in the form of dome 10 on the substrate 12.

A preferred sealing material comprises a polysulfide sealant. An exemplary sealing material is available from PPG Aerospace, division of PPG Industries, Pittsburgh, PA, under the product designation PR 1440. An alternative example sealing material is available from the same company under the product designation PR 1422 .

FIG. 1 shows an exemplary dome-shaped brake washer unit 10 in relation to exploded view with an arrangement of the sealing mold 16. As shown, the illustrative sealing mold 16 comprises a cover

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generally cylindrical inner 22 mounted with an outer skirt 24. The outer skirt includes a generally cylindrical upper segment 26 sized for sliding movement relatively close along an upper region of the cylindrical inner lid 22. Of this upper segment 26, the outer skirt 24 includes an outwardly enlarged lower segment 28 which ends in a comparatively larger lower or outer annular flange 30. FIG. 2 shows these components mounted in an inverted orientation to define a hollow or annular channel presented downwards 32 that is partially filled with a metered amount of the sealing material 14 in uncured form from a suitable dispenser 34 or the like. Importantly, the amount of sealing material 14 applied in this hole or channel 32 prevents the channel or hole 32 from being filled completely to the edge 30, so that the sealing material 14 does not come into contact with unwanted surfaces.

FIG. 3 shows a detachable film 36, of the type disclosed in US Pat. UU. 8,038,823. This detachable film 36 is shown as a thin transparent film or layer covering the lower end of the assembled components 22, 24 of the sealing mold 16, with the dosed amount of sealing material 14 contained within the annulus or annular channel 32 in relation separated from the protective detachable film 36. As shown, the film 36 may include a layer of suitable pressure sensitive adhesive 38 on one side thereof to temporarily secure the film 36 to the flange 30 of the enlarged lower portion 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 seen in FIG. 3, the entire sealing mold 16 with the dosed amount of uncured sealing material 14 therein can be refrigerated, and preferably frozen, to prevent the sealing material 14 from curing early. When the sealing mold 16 with the sealing material 14 contained therein is ready for use, the entire assembly can be heated quickly or slowly to defrost 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 through a brake washer unit in the form of a dome 10 or the like and the related dome 18, which has previously been installed on a substrate 12. The illustrative brake washer unit 10 comprises the adhesive-mounted brake washer unit, which has the substantially cured adhesive cord or material 20 that secures the brake washer unit 10 on the blind side of the substrate 12, wherein this substrate 12 may comprise a wall of an aviation fuel tank or the like. The detachable film 36 (FIG. 3) is manually removed from the seal mold 16 to accommodate the installation of the seal mold in the dome-shaped brake washer unit 10 as seen in FIG. Four.

The inner cover 22 of the sealing mold 16 fits closely but slidably, on the dome 18 of the brake washer unit 10, with a bottom flanged end and radially outwardly 40 of the cylindrical inner cover 22 which is placed on and is substantially sealed with a radially enlarged lower shoulder 42 in the dome 18 near the cord or adhesive material 20. In this position, with the lower end 40 of the inner lid 22 placed on the lower shoulder 42 of the dome 18, the skirt outer 24 then moves downward, in a direction towards the substrate 12, to cause the upper segment 26 to slide along the inner lid 22 to extrude the sealing material 14 down onto the bonding interface. More particularly, as the outer skirt 24 travels along the inner lid 22, the widened lower end segment 28 of the outer skirt 24 pushes the uncured sealing material 14 downward in the form of an extruded film of thickness substantially uniform that surrounds or circumscribes the junction interface for interconnection or tight coupling between sf of the dome 18 with the substrate 12 (FIGS. 5-6). In this position, as seen in FIGS. 5-6, the sealing mold 16 is allowed to remain in place for a period of time of at least about a few hours sufficient to allow the sealing material 14 to cure.

After substantially complete curing of the sealing material 14, the sealing mold 16 is quickly and easily removed from the cured sealing film 14, as shown in FIG. 7. In this regard, the sealing mold 16 is constructed from a plastic or other suitable material that is resistant to permanent adhesive bonding or bonding to the cured sealing film 14. FIG. 7 shows the inner cover 22 having an open upper end 44. A pair of conventional tweezers 46 or other suitable tool is used to grab the open upper end 44 of the inner cover 22 and pull the sealing mold 16 from the cured sealant 14 Alternatively, if desired, the tool 46 can be used to remove the sealing mold 16 with a turning movement.

FIGS. 8-10 illustrate an arrangement in which the common components with those previously shown and described in FIGS. 1-7 are identified by common reference numbers increased by 100. As shown, a modified sealing mold 116 is provided to apply a curable sealing material 114 over the joint interface between the dome 118 of a brake washer unit in the form of a dome 110 or the like secured on a blind side of a substrate 112, such as the wall of an aviation fuel tank or the like. As before (FIGS. 1-7), the sealing mold 116 comprises an inner cover 122 having a size and a shape for a relatively close sliding relationship within an upper cylindrical region 126 of an outer skirt 124, from which a lower end includes a widened segment angled outwardly and downwardly 128 that ends in an outer flange 130.

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The assembled components of the sealing mold 116 are pre-filled with a metered amount of the selected sealing material 114 in the same manner as shown and described previously with respect to FIG. 2. The sealing mold 116 with the dosed amount of the curable sealing material 114 is then adjusted on the dome 118 of the brake washer unit 110 (FIG. 9), the inner lid 122 having a size and shape for reception by sliding adjustment relatively close to the dome 118. A lower end 140 of the inner lid 122 is placed on a radially enlarged shoulder 142 at the lower end of the dome 118. The outer skirt 124 then moves downward in a direction towards the substrate 112 to extrude sealing material 114 in a relatively thin and substantially uniform layer to securely interconnect dome 118 with substrate 112, all in the manner previously shown and described herein.

The difference between the arrangement of FIGS. 8-10 versus the provision of FIGS. 1-7 mainly refers to a reconformed upper end 144 of the inner cover 122. More particularly, instead of the fully open cylindrical shape shown in FIGS. 1-7, the provision of FIGS. 8-10 shows a partially closed upper end 144 with a small post 145 formed therein. With this configuration, after a suitable curing time for the sealing material 114, the entire sealing mold 116 is quickly and easily removed from the cured sealing material, such as by coupling the upper port 145 to a suitable source 148 pressurized air or the like. By constructing the components of the sealing mold of a suitable plastic or plastic-based material that does not permanently adhere to the cured sealing material 114, said brief application of pressurized air or other compressed gas selected through port 145 and within the upper region of the inner lid 122 it is effective to release the entire seal mold 116 from the cured seal material 114, as seen in FIG. 10.

An additional arrangement is shown in FIGS. 11-12, in which the corresponding components in structure and function with those shown and described previously in FIGS. 1-7 are identified by common reference numbers increased by 200. As shown, the sealing mold 216 is constructed with a single piece or unit construction to include the inner cover 222 in combination with a bottom skirt flared outward 224. The Inner cover 222 defines a lower end 240 for the seat on a radially enlarged shoulder (not shown) at the lower end of the dome-shaped brake washer unit (also not shown). The cylindrical interior of the inner cover 222 is sized and shaped for reception by sliding adjustment relatively close to the dome (not shown) of a dome-shaped brake washer unit. An upper end 244 of the inner cover 222 is shown to be fully open (in accordance with FIGS. 1-7), although those skilled in the art will recognize and appreciate that the upper end 244 may be partially closed and include a small port formed therein for FIGS. 8-10, if desired.

The outer skirt 224 of the modified sealing mold 216 includes the outwardly enlarged lower region 228 extending outwardly from the inner cover 222. In an initial position or state, the outwardly enlarged lower region initially defines the hollow or channel or annular 232 to receive a dosed amount of the selected sealing material 214 (FIG. 11). In use, however, the inner cover 222 of the sealing mold 216 is initially fitted on a dome-shaped brake washer unit previously mounted on a selected substrate 212 (FIG. 12). The lower end 240 of the inner lid 222 sits on the dome shoulder (as shown and described previously), in turn followed by the displacement of the enlarged lower region 228 of the outer skirt downwards or towards the adjacent substrate 212 (FIG. 12). Said downward movement of the enlarged lower region 228 from an initial retracted position defining the annular recess or channel 232 (FIG. 11) over the center to an advanced position with an outer flange 230 thereof in contact with the substrate 212 (FIG 12), effectively extrudes the sealing material 214 in a relatively thin layer that hermetically interconnects the dome of the brake washer unit with the substrate 212. After an adequate curing time, the sealing mold 216 is quickly removed and easily, as described above, of the cured sealing material.

FIGS. 13-15 show a sealing mold fixation that performs the invention, in which the corresponding components in structure and function with those shown and described previously in FIGS. 1-7 are identified by common reference numbers increased by 300. As shown, a modified 316 sealing mold is provided to apply a curable sealing material 314 over the joint interface between a dome 318 of a brake washer unit in the form of a dome 310 or the like secured on a blind side of a substrate 312, such as the wall of an aviation fuel tank or the like. As before (FIGS. 1-7), the sealing mold 316 comprises an inner cover 322 defining an inner wall of an upper and generally cylindrical chamber 350, with an outer wall that is defined by a generally cylindrical outer skirt 324 A lower end of the outer skirt 324 is gently mixed with a widened segment angled outwardly and downwardly 328 ending in an outer flange 330.

The inner cover 322 of the sealing mold 316 defines a boundary or inner wall of the generally cylindrical chamber or cavity 350 defined by the sealing mold 316. The boundary or outer wall of this chamber 350 is defined by a vertical outer skirt 324 in the sealing mold 316, and a limit or lower wall is defined by a short annular wall 354 that interconnects the inner cover 322 with the outer skirt 324 and has a matrix or plurality of small passages 356 formed therein. This otherwise open chamber in the upper part 350 is previously filled with a metered amount of the curable sealing material selected 314, followed by the closure of the region.

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upper of the chamber 350 with an annular shaped plunger 358 or the like, which slidably adjusts with a relatively tight tolerance therein.

The assembled components of the sealing mold 316 are then placed on the dome 318 of a brake washer unit 310 or the like, as seen in FIG. 13. In this initial position, the sealing material 314 is fully disposed within the chamber of the sealing mold 350. The sealing mold 316 is then pressed down onto the underlying dome 318 until the outer flange 330 of the widened segment in downward angle 328 sits substantially on the blind side of the substrate 312 in a relationship that is circumscribed with the cord or joint interface 320 of the brake washer unit 310 or the like. In this position, the plunger 358 is slidably pressed in a direction towards the substrate 312 to extrude the sealing material 314 of the chamber 350 and through the step matrix 356 into a relatively thin and substantially uniform layer for interconnecting in a manner Secure dome 318 with substrate 312, all in the manner shown and described previously in this document.

After curing the sealing material 314, a reconformed upper end 344 of the inner lid 322 facilitates the rapid and easy removal of the sealing mold 316. More particularly, the realization of the FlGS. 13-15 again shows a partially closed upper end 344 with a small port 345 formed therein. With this configuration, after a suitable curing time for the sealing material 314, the entire sealing mold 316 is quickly and easily removed from the cured sealing material, such as by coupling the upper port 345 to a suitable source 148 pressurized air or other selected compressed gas or the like. By constructing the components of the sealing mold of a suitable plastic or plastic-based material that does not permanently adhere to the cured sealing material 314, said brief application of pressurized air through port 345 and within the upper region of the inner cover 322 is effective for releasing the entire sealing mold 316 from the cured sealing material 314, as seen in FIG. fifteen.

A variety of modifications and further improvements in and for the improved sealing mold and related procedure or use will be apparent to those skilled in the art. Consequently, no limitation on the invention is provided by the above description and the accompanying drawings.

Claims (11)

5 10 fifteen twenty 25 30 35 40 Four. Five fifty 55 60 65 1. A sealing mold fixing for sealing a joint interface between a substrate (312) and a dome (318) mounted on the substrate, said sealing mold fixing comprising: a sealing mold (316) having an outer skirt (324) attached at a lower end thereof to a widened segment angled downwards (328) that ends in an outer flange (330) having a size and a shape for circumscribe to the union interface; said sealing mold also including an inner lid (322), carried by said outer skirt (324), said inner lid having a size and a shape to accommodate reception by sliding adjustment of the dome (318); Y a metered amount of a curable sealing material (314) in an uncured form that partially fills the space between said inner cover (322) and said outer skirt (324); said outer flange of the sealing mold (330) can be placed substantially on the substrate (312) in a position that circumscribes the bonding interface through which the sealing material (314) is applied to seal between the substrate (312) and the dome (318); Y said sealing mold (316) being separable from said sealing material (314) after curing thereof, characterized in that said inner cover (312) cooperates with said outer skirt (324) to define a chamber (350) between them to receive said dosed amount of said sealing material, said chamber (350) having a lower end defined by a wall (354 ) having a plurality of passages (356) formed therein, and a plunger (358) received at an upper end of said chamber (350) after said sealing material (314) is received therein, said being plunger (358) movable towards the substrate (312) after said outer flange of sealing mold (330) is placed thereon to supply the sealing material (314) to seal between the substrate (312) and the dome ( 318). 2. The sealing mold fixing according to claim 1, wherein said sealing mold (316) is formed of a plastic-based material to avoid permanent adhesion to the cured sealing material (314). 3. The fixing of the sealing mold according to claim 1, wherein said outer skirt of the sealing mold (324) is slidably movable relative to said inner cover (322) in a direction towards the substrate (312 ) after said outer flange of sealing mold (328) is placed thereon to supply the sealing material (314) for sealing between the substrate (312) and the dome (318). 4. The fixing of the sealing mold according to claim 1, wherein said sealing mold (316) is detachable by peeling off said sealing material (314) after curing thereof. 5. The sealing mold fixing according to claim 4, wherein said inner sealing mold cover (322) has a relatively small open port (345) formed therein, and also includes means of compressed gas (148) selectively coupled with said port for detachment of said sealing mold (316) from said sealing material (314) after curing thereof. 6. The sealing mold fixing according to any preceding claim, wherein the dome (318) comprises a dome-shaped lid. 7. A sealing process between a substrate (312) and a dome (318) mounted on the substrate (312), the process comprising the steps of: forming a sealing mold (324) having an outer skirt (324) attached at a lower end thereof to a widened segment at an angle downwards (328) ending in an outer flange (330) having a size and shape to circumscribe to the union interface; further including said sealing mold (316) an inner cover (322) carried by said outer skirt (324), the inner cover (322) having a size and a shape to accommodate reception by sliding adjustment of the dome (318) ; partially fill the gap between the outer seal mold skirt (324) and the inner lid of the seal mold (322) with a metered amount of a curable seal material (314) in uncured form; placing the outer sealing mold flange (330) on the substrate in a position that circumscribes the bonding interface through which the sealing material (314) is applied to seal between the substrate and the dome (318); Y separating the sealing mold (324) from the sealing material (314) after curing it; 5 10 fifteen twenty 25 wherein said forming step comprises forming an inner cover (322) to cooperate with the outer skirt (328) to define a chamber (350) therebetween to receive the dosed amount of the sealing material (314), the chamber having (350) a lower end defined by a wall (354) having a plurality of passages (356) formed therein, and a plunger (358) received at an upper end of the chamber (350) after the material of sealing (314) is received inside, and that also includes the step of moving the plunger (358) towards the substrate (312) after the outer flange of sealing mold (330) is placed thereon to supply the sealing material (314) to seal between the substrate (312) and the dome (318). 8. The method according to claim 7, wherein said forming step comprises forming the sealing mold (316) of a plastic-based material to prevent permanent adhesion to the cured sealing material (314). 9. The method according to claim 7, wherein said forming step comprises forming the outer skirt of the sealing mold (328) to be slidingly movable relative to the inner cover (322), and which also includes the step of slidingly sliding the outer skirt of the sealing mold (328) in the inner cover (322) in a direction towards the substrate (312) after the outer flange of the sealing mold (330) is placed thereon to supply the sealing material (314) to seal between the substrate (312) and the dome (318). 10. The method according to claim 7, wherein said step of separating the sealing mold (324) from the sealing material (314) after curing thereof comprises detachment separation. 11. The method according to claim 10, wherein said forming step further comprises forming the inner seal mold cap (322) with a relatively small open port (345) formed therein, and also wherein said separation step comprises coupling compressed gas means (148) in the inner cover port (345) for detachment of the sealing mold (316) from the sealing material (314) after curing thereof.