KR101239007B1 - A device for depositing adhesive under pressure - Google Patents

Abstract

The invention relates to an apparatus 8 for laminating an adhesive on a surface 13 to be coated under pressure, the apparatus comprising one or more dispensing nozzles distributed over its width. The device is noteworthy in that the nozzle is generally semi-cylindrical and has an outlet with an axis parallel to the surface to be coated.

Adhesive, Dispensing Nozzle, Outlet, Adhesive Inlet, Bore, Pin, Gap

Description

Adhesive Laminating Device under Pressure {A DEVICE FOR DEPOSITING ADHESIVE UNDER PRESSURE}

1 is a cross sectional view of a surface to be coated and its periphery;

Fig. 2 is a perspective view of the device with the pin in detail shown in exploded view;

3 is a cross-sectional detail view of the device.

4 is a longitudinal cross-sectional perspective view of the device.

5 is a sectional view of the nozzle outlet and the groove;

Figure 6 is a bottom view of the nozzle outlet, groove and feed channel.

<Explanation of symbols for the main parts of the drawings>

1: Body

2: nozzle outlet

3: notch or groove

4: diffusion channel

5: pin

6: bore

7: guide

8: device

9: glue inflow means

10: U-shaped fastener member

11, 51: shoulder

13: surface

14 passage

15: first heat insulating layer

17, 18: panel

52: hole

53: chamber

70, 70 ': side leg

71: middle leg

510, 520: cylindrical part

[Document 1] French Patent Application No. 2 822 815

The present invention relates to an apparatus for laminating an adhesive under pressure for attachment to a strip, in particular the apparatus being used in the manufacture of thermal insulation and leak-tight walls of tanks embedded in the carrying structure, in particular the hull of a ship. The wall consists of at least two insulating layers.

By way of example, these walls are used in ships carrying liquefied gas that must be completely leak-proof and sufficiently insulated so that the tank holds the liquefied gas at low temperatures and suppresses evaporation of the gas.

These walls consist of two successive sealing membranes, a first membrane in contact with a material retained in a tank, and a second membrane disposed between the first membrane and the conveying structure, These two membranes replace two thermally insulating shields. Thus, the walls consist of a first heat insulating portion bonded to a first membrane made of stainless steel and made of foam, and a second heat insulating portion made of foam and combined with a flexible second membrane. It is known. This second membrane comprises at least one continuous sheet metal foil, such as an aluminum foil adhesively interposed between two sheets of fiberglass fabric. And a first heat insulating portion made of a foaming agent, combined with an Invar membrane, which is 36% nickel and is thermally stable steel between -200 ° C and 400 ° C, and at least one thin plate There are walls with a second thermal insulation made of foaming agent and bonded with a flexible second membrane comprising a metal foil.

These insulation and leakage barrier walls consist of a set of prefabricated panels each comprising a second insulation, a second membrane and a first insulation in succession between two rigid plates. The first membrane is then manufactured directly on a set of prefabricated panels covering the conveying structure.

Each prefabricated panel is usually in the form of a rectangular block having a first thermal insulation element and a second thermal insulation element in the form of a first rectangle and a second rectangle that are each substantially parallel in plan view, the length of the first rectangle and / or Or the width is shorter than the corresponding dimension of the second rectangle to provide a peripheral margin. The peripheral margin of the adjacent panel and the side walls of the first insulating element form passages that can extend along the entire length, width or height of the tank. These passages are filled to ensure that the seal formed by the panels is continuous before placing the first membrane. The continuity of the first thermal shield is obtained by inserting blocks into the passages. To ensure the continuity of the seal to the second membrane at the connection between the two panels, the peripheral margin is covered with a strip of flexible sheet material comprising at least one continuous sheet metal foil before placing the blocks. .

The mounting of these panels requires very stringent working conditions and very high accuracy in mounting. The strip of flexible sheet material should be attached to the bottom and the pairs of panels should be sealed in a particularly precise manner.

Prior art for obtaining a seal at a peripheral margin includes laminating an epoxy or polyurethane-based adhesive onto the peripheral margin, spreading the flexible strip onto the adhesive coated margin, and pressing the strip downward with hand pressure. Consists of steps. During the polymerization of the adhesive, the strip of flexible sheet is maintained at a pressure of about 0.1 bar or 0.2 bar (0.1 × 10 ⁵ Pa or 0.2 × 10 ⁵ Pa) depending on the type of resin.

The adhesive should be laminated at a given weight per unit area and uniform over the surface to be coated. In addition, the laminated film of adhesive should be as continuous as possible.

The first known technique for laminating adhesives consists in initially distributing the volume of adhesive corresponding to the area to be coated. The worker then laminates the volume of adhesive by hand using a spatula. The technology is boring and unreliable. In general, the weight per unit area is observed but a lack of uniformity is given and it cannot be guaranteed that it is allowed at all locations.

Means for applying the adhesive are also mentioned in the above documents but are not described in detail, which means that the perforated cylindrical mixer can apply the adhesive onto the margins of adjacent panels before placing the strip of flexible sheet on the panel. Head. These means have the drawback of being integrated into a complex machine for attaching the strip to the bottom.

The present invention seeks to remedy the above mentioned drawbacks of the prior art. In particular, it seeks to provide a simple means of laminating the adhesive onto the surface to be coated in a uniform manner as quickly as possible over a long and continuous length, while complying with the desired weight per unit area.

To this end, the present invention provides an apparatus for laminating an adhesive on a surface to be coated under pressure, the apparatus comprising one or more dispensing nozzles distributed over its width.

According to the invention, the nozzles have individual outlets having a generally semi-cylindrical shape and having axes generally parallel to the surface to be coated. This shape makes it possible, for example, to prevent the nozzles from clogging during application of the adhesive to the inner ceiling and to prevent leakage under gravity.

According to a feature of the invention, there are grooves between the nozzle outlets. They allow any excess adhesive to be collected, thereby ensuring continuous contact between the device and the surface to be coated.

According to a feature of the invention, the grooves have a triangular cross section.

According to another feature of the invention, the apparatus comprises means for dispensing adhesive between the nozzles upstream from the nozzles, the means consisting of a bore having a pin mounted therein with a gap, the pin and the bore The gap between them corresponds to the space needed to pass the adhesive. Thus, the volume of adhesive entering the inlet of the system is evenly distributed to each nozzle at approximately the same pressure at each nozzle.

The pin is fixed relative to the bore and the gap between the pin and the bore extends over a length approximately equal to the width of the device.

According to a feature, the apparatus for laminating the adhesive comprises a diffusion channel connecting the bore to the nozzle outlet.

According to an advantageous feature of the invention, the device for laminating the adhesive is designed to coat a surface located at the lower end of the passage, the upper portion of the apparatus comprising a guide adapted to a support against at least one side wall of the passage. The guide thus allows the adhesive to be laminated in a practically straightforward manner.

According to another feature of the invention, the device for laminating the adhesive is connected to a movable reservoir which holds a known volume of adhesive via means for introducing the adhesive into the device. The use of a movable reservoir makes it easier for the operator to stack the adhesive.

According to another feature, the device for laminating the adhesive is a device in which the speed of the adhesive flowing out of the reservoir is controlled so that it is possible to comply with the requirements for the required weight per unit area.

The present invention can be more easily understood by reading the following description. This description, given purely by way of example, is described with reference to the accompanying drawings.

FIG. 1 shows the surface to be coated 13 located underneath the passage 14 formed between the first insulating layers 15 of two adjacent panels 17, 18. In general, as shown herein, the passage or groove 14 exhibits a generally rectangular or square cross section.

In Fig. 2, the surface 13 to be coated is indicated by dashed dashed lines. It occupies the plane P.

FIG. 2 shows a preferred configuration of the device in which a guide 7 for pressing against at least one side wall of the passage 14 is fixed on top of the body 1 of the device.

In the embodiment shown in FIG. 2, this guide 7 occupies a plane parallel to the plane P. FIG. In plan view, it is H-shaped and has two parallel side legs 70, 70 ′ and a middle leg 71.

The guide 7 is fixed to the body 1 by any suitable means, for example U-shaped fastener means 10 as shown in FIG. This member extends in a plane perpendicular to plane P.

In this arrangement, an elongated, preferably tubular, adhesive inlet means 9 can be shown, which can also serve as a handle for manipulating the device 8.

The figure also shows a pin 5, a bore 6, preferably a circular cross section, and a cap 10.

The main body 1 is of elongate shape, and the bore 6 penetrates through the main body. The bore 6 extends along the longitudinal axis X-X 'which is parallel to the plane P and perpendicular to the direction Z-Z' in which the device 8 is moved.

The tube constituting the inlet means 9 extends along an axis W-W 'perpendicular to the axis X-X' and inclined with respect to the plane P.

Figure 3 shows in detail the cross section of the device 8 according to a variant of the invention, wherein the adhesive inlet extends along the same main direction (Y-Y ') as the direction of the diffusion channels 4. Occurs through.

These channels 4 are described below. Axis Y-Y 'is perpendicular to axis X-X' and plane P.

Bore 6, shaft 5 and nozzle outlet 2 may also be shown in the figure.

4 shows a pin 5 mounted in a bore 6 arranged inside the body 1 of the device, which assembly constitutes means for dispensing the adhesive.

In a preferred configuration, the pin 5 provides a shoulder 51 at one of the ends of the pin that presses against the body 1 of the device. The other end of the pin 5 provides a tapped hole 52 suitable for receiving a spiraled cap 10 which also provides a shoulder 11 for pressing against the body 1 of the device. The pin 5 is fixed when mounted in this way inside the body 1 of the device.

Over the length of some of the pins located between the ends 51, 52 of the pins, the pin 5 provides a diameter slightly smaller than the diameter of the bore 6.

Thus, there is a small annular gap j between the fin 5 and the bore 6 which forms a chamber 53 which forms a path for passing the adhesive guided from the inflow means 9.

At both ends, the pin 5 provides cylindrical portions 510, 520 of diameter corresponding to the inner diameter of the bore 6, so that the chamber 53 is closed at both ends.

The plurality of diffusion channels 4 extend in a direction parallel to the axis Y-Y '. Each diffusion channel leads into the chamber 53 at one of its ends and into the nozzle outlet 2 at the other end.

5 and 6 show the diameter of the semi-cylindrical nozzle outlet 2, the triangular notch or groove 3, and the approximately center of the length of the nozzle outlet 2 as shown by way of example and the diameter of the semi-cylindrical nozzle outlet 2; Diffusion channels 4 are shown which have generally the same diameter.

The semi-cylindrical nozzle outlet 2 is generally parallel to the plane P of the surface 13 for coating and the axis Z ₂ -Z ' ₂ parallel to the direction of movement Z-Z' of the device 8 for laminating the adhesive. Extends along

The grooves 3 have a triangular cross section shown in a plane perpendicular to plane P.

Adhesive flow (not shown) exiting from the reservoir of known volume under pressure enters the controlled flow rate into the device 8 for laminating the adhesive via the inlet means 9. Then, by constructing an obstacle to the flow of adhesive, the pin 5 serves to evenly distribute the adhesive by volume and pressure with respect to all the diffusion channels 4. After passing along the diffusion channel 4, the adhesive leaves the device through the semi-cylindrical nozzle outlet 2, thereby forming as many parallel beads of adhesive as there are nozzles. The operator controls the weight deposited per unit area by visually ensuring that the thickness and width of the parallel beads of the adhesive obtained are close to the corresponding values of the reference beads (not shown). These reference beads, which may be used by the operator, are prepared and inspected before commencing the adhesive coating operation. They are the width and thickness to which the appropriate weight per unit area is locally observed. The manual work of smoothing the beads of the adhesive with a spatula is finally performed before applying the strip of flexible sheet material.

The device of the invention can be used to attach the strip on any surface arranged between two transversely spaced structures.

The present invention provides a simple means of laminating the adhesive onto the surface to be coated in a uniform manner as quickly as possible over a long, continuous length, while complying with the desired weight per unit area.

Claims (9)

One or more dispensing nozzles distributed over the width of the device, In the apparatus (8) for laminating the adhesive to the surface to be coated (13) under pressure, the nozzles have individual cylinders (2) of semi-cylindrical shape with axes parallel to the direction of movement of the apparatus (8). The apparatus comprises means for dispensing the adhesive between the nozzles upstream from the nozzle, the means consisting of a bore 6 having a pin j and a pin 5 mounted thereon, the pin 5 and the bore 6 Adhesive gap laminating apparatus, characterized in that the gap (j) between) corresponds to the space required to pass the adhesive. Adhesive stacking device according to claim 1, characterized in that there are grooves (3) between the nozzle outlets (2). Adhesive stacking device according to claim 2, characterized in that the grooves (3) are triangular in cross section. The pin (5) according to claim 1, wherein the pin (5) is fixed relative to the bore (6), and the gap (j) between the pin (5) and the bore (6) extends over the same length as the width of the device (8). Adhesive lamination apparatus characterized by the above-mentioned. Adhesive stacking device according to claim 1, characterized in that the diffusion channels (4) connect the bores (6) to the nozzle outlets (2). The device according to claim 1, wherein the device is designed to coat a surface 13 located below the passageway 14, the upper portion of the device having at least one side wall of the passageway 14. Adhesive lamination device, characterized in that it comprises a guide (7) suitable for the support against the. Adhesive device as claimed in claim 1, wherein the device is connected to a movable reservoir which holds a known volume of adhesive via means (9) for introducing the adhesive into the device. 8. An adhesive lamination apparatus according to claim 7, wherein the adhesive outflow rate from the reservoir is controlled. delete

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