WO2013030271A2

WO2013030271A2 - Applicator head, system, and method for producing glazing elements

Info

Publication number: WO2013030271A2
Application number: PCT/EP2012/066853
Authority: WO
Inventors: Andreas DIRKSEN
Original assignee: Sika Technology Ag
Priority date: 2011-09-02
Filing date: 2012-08-30
Publication date: 2013-03-07
Also published as: EP2565347A1; WO2013030271A3; EP2751357A2

Abstract

The invention relates to an applicator head (10) for attachment to a reservoir (41) or a mixing device in order to fill an elongated deep gap (47b) from an access area lying next to the gap with an adhesive or sealant from the reservoir or mixing device, wherein the applicator head has a first discharge channel (15) that has a first discharge opening (15a) and is connected to an outlet (11) of the reservoir or the mixing device and a second discharge channel (17) that has a second discharge opening (17a), wherein the first discharge channel and the first discharge opening have a significantly smaller cross-section than the second discharge channel and the second discharge opening.

Description

Applicator head and system and method for the production of

glazing elements

description

Technical area

The invention is in the field of window manufacturing and construction and relates to an applicator head for placement on a storage container or a mixing device, from which a pasty adhesive or sealant can be discharged. It also concerns a facility for

Production of glazing elements and a method for producing a glazing.

State of the art

For a long time, bonding and sealing techniques have been used in industry and in the construction industry in which a pasty adhesive or sealant either directly from a reservoir through a needle or nozzle or (in the case of Mehrkomponentenkleb- / sealants) via a mixing device under Pressure is discharged to a surface to be coated or in a gap to be filled. Over the years, various discharge and mixing devices as well as corresponding highly productive plants for industrial use have been developed.

Regardless of the particular design and drive, these devices typically have a single dispensing needle or nozzle for creating a line of adhesive or sealant on one

coating surface or edge or in a gap.

Such devices are also used in the production of insulating windows, in which assembled in a profile parts

Window frame an insulating glazing, d. H. a ready made

Glass stack of two or more firmly connected Glass panes, is glued. Here, as well as in similar processes for the production of glazings, is an elongated deep gap between a fold, which is formed by the profiled frame part, and the

clean, reliable and with high productivity from the side with an adhesive of a given consistency to fill corresponding end face of the insulating glass. Applicator heads are used whose special shape largely prevents an uncontrolled and too superficially unclean adhesions leading adhesive leakage from the gap upwards.

According to the findings of the inventors, however, the quality of the adhesions produced with these applicator heads is still in need of improvement.

The invention is therefore based on the object, an improved

Applicator head for use in methods of the type mentioned and a correspondingly improved system and an improved method for

To provide glazing production.

Disclosure of the invention

This object is achieved in its device aspect by an applicator head having the features of claim 1 and in its method aspect by a method having the features of claim 12. expedient

Training of the inventive concept are the subject of the dependent claims.

The invention is based on the knowledge of the inventors that in the mentioned glazing work, the special geometry of the splice, in conjunction with the predetermined consistency of the adhesive, leads to suboptimal material flow. On the one hand, this can lead to undesirable adhesive leakage from the adhesive gap on the opposite surface of the adhesive

Insulating glazing and on the other hand lead to incomplete filling of the gap with adhesive and thus to reduced quality of the bond.

Furthermore, the invention therefore includes the consideration of the adhesive flow better adapted to the specific geometry of the splice. These

Consideration in turn has led the inventors to provide instead of a single discharge channel with a discharge (at least) two discharge channels with different opening cross-section through the adhesive with - due to cross-section - different pressure and thus different trajectory emerges. Also, the applicator head may comprise two (or more) tubes of different cross-section, which are commonly connected to an outlet of the reservoir or the mixing device

This succeeds in optimizing the flow of adhesive in the direction of complete filling of the adhesive gap with a simultaneous better dosage of the per unit length of the gap to be discharged adhesive amount to an undesirable exit on the opposite side of the

Insulating glazing (or other glazing element) to avoid largely without additional structural means.

This results in a total of bonds with higher strength and

impeccable optical quality that can be produced with satisfactory productivity.

In an economically significant embodiment, the reservoir or the Mischeinrichtu ng as adhesive reservoir or Klebstoff- Mischeinrichtu ng to industrial or Baustel len use and r

Provision of a ready mixed adhesive formed at the exit. This embodiment relates on the one hand to dimensioning, but on the other hand also to the selection of materials for the essential parts or surfaces which have to be compatible with industrial adhesive or building adhesives and the discharge quantities usually used in their use.

In one embodiment of the invention it is provided that the

Cross sectional area of the first discharge port is 50% or less of the cross sectional area of the second discharge port. Depending on the specific dimensions, in particular the width / depth ratio of the Adhesive gap and the consistency of the adhesive, also a different aspect ratio of the discharge channels and -Öffnu lengths may be appropriate. Furthermore, it may be expedient to provide more than two discharge channels and openings.

In a further embodiment of the invention, the first and second discharge channels and the associated discharge opening each have one

circular cross-section. In addition, the channel or

Opening sections may also be elliptical or, according to a long hole or, in special cases, substantially rectangular.

In a further embodiment, the plane of extent of the first and / or second discharge opening has a smaller angle than 90 ° relative to the longitudinal axis of the respective discharge channel, in particular an angle in the range between 30 ° and 60 °, more particularly an angle of 45 ° °. The specified angle depends on the desired angle

Tilting the surface of the adhesive panel between the pane and the frame. From a current point of view, it is preferred that the extension plane of the first and second discharge openings lie together in an end face of the applicator head which is inclined relative to the longitudinal extension of the first and second discharge channels.

In another embodiment, one is in the first or second

Austragöffnu ing end portion of the first and / or second discharge channel curved or gegenü over a the output of

Reservoir or the M ischeinrichtu ng adjacent initial section of the respective discharge channel angled. In a further embodiment, the end portion of the second discharge channel is more curved or angled than the end portion of the first discharge channel. More specifically, it is provided that the end portion of the first discharge channel is angled by 60 ° to 90 ° and the end portion of the second discharge channel by 30 ° to 60 °. With reference to a specific, usually selected spatial position of the frame and the insulating glazing (or another

Glazing element) when using the proposed applicator head, it is also possible to specify the position of the first and second discharge channels with the respectively associated discharge opening relative to each other:

Specifically, the application of the adhesive or sealant takes place on the Rahmenfalz, in particular the filling of a gap between the Rahmenfalz and the glass sheet assembly, in a horizontal position of the latter. Here, the applicator head is typically from the top of the surface of the

Set glass plate assembly and guided along this along the frame, wherein the applicator head is formed and / or positioned so that the second discharge opening or behind it is placed in the feed direction above the first discharge opening. The applicator head can also be placed on the frame itself and guided along the frame, and also a free, non-patch movement along the Rahmenfalzes is possible.

In this procedure, it is achieved that by the first

Discharge opening with a relatively high pressure discharged and therefore directly to the opposite, vertical Rahmenfalz splashing adhesive a kind of boundary wall for the second

Discharge opening builds up with less pressure emerging adhesive flow. In this way, a desired substantially the (in the horizontal position of the window) upper portion of the gap between frame rebate and glass pane assembly filling filling is realized without adhesive runs to a considerable extent in the lower area.

DESCRIPTION OF THE DRAWINGS Advantages and expediencies of the invention will be apparent from the

following description of preferred embodiments with reference to the figures clearly. From these show: Fig. 1 is a schematic representation of a first

Embodiment of the invention

Applikatorkes, Fig. 2 is a schematic representation of a second

Embodiment of the invention

applicator,

Fig. 3 is a schematic representation of a third

Embodiment of the invention

applicator,

Fig. 4 is a partially sectioned perspective view of a frame portion of an insulating window with schematically shown attached

Klebstoffaustragvorrichtung and schematic

Representation of the adhesive flow in the adhesive gap,

5 shows a comparison with FIG. 4 modified representation with modified Klebstoffaustragvorrichtung and

Fig. 6 is an illustration of another embodiment.

1 shows a schematic cross-sectional view of an applicator head 10 for screwing onto the outlet 11 of a (otherwise not shown) storage container or an adhesive discharge device. To attach thereto, the applicator head 10 has a cylindrical pot portion 13 with internal thread 13 a. From a sloping side surface 13b or the bottom surface 13c of the pot portion 13, a first discharge channel 15 originates with a first discharge opening 15a and a second

Discharge channel 17 with a second discharge opening 17a, which has a substantially larger cross-section with respect to the first discharge channel. The outer shape of the applicator head 10 may be substantially cylindrical (see. Fig. 5) or prismatic (see Fig. 4), and he has a slope 19, in which both discharge openings 15a, 17a are located.

Fig. 2 shows a basically similar applicator head 20, and identical or identically acting sections or parts are shown in FIG. 1 ajar reference numerals and u nd will not be explained again here. The construction differs from that of the

Applicator head 10 of FIG. 1 substantially in that in the region of the slope 29 separate bent tubes 25 and 27 are brewed brew, which form the first and second discharge channel and whose free Öffnu conditions the first and second Austragöffnu ng 25 a, 27 a represent. The second tube 27 is slightly more curved in its end than the first tube 25, which in use leads to the fact that from the second

Austragöffnu ng 27a leaking adhesive with a flatter Bahnku rve exit than from the first discharge port 25a. As a rule, however, the curvatures of the end regions of the two tubes and the particular trajectories of the respectively exiting adhesive can also be approximately the same. A comparable effect is also with the third embodiment in FIG. 3 achieved applicator head 30. The pot 33, which the

Connecting region forms at the output 31 of a reservoir or a Mischvorrichtu ng, here has a flat bottom 33 b, from which a respective angled executed first and second discharge channel 35 and 37 arise. As can be seen in Figu r, the end portion of the second discharge channel 37 gegenü over its initial region more angled than the end region of the first discharge channel 35. The inside diameter of the second discharge channel 37 and thus also the cross-sectional area of the associated discharge opening 37a is also Here, much larger than the Lichte width of the first discharge and the resulting from it

Cross sectional area of the first discharge opening 35a. Emerging adhesive thus emerges from the first Austragöffnu ng not nu r at a greater angle to r horizontal, but also at a higher pressure than from the second discharge port 37 a. The effect achieved in a method according to the invention is shown in FIG. 4 and 5 sketched. This shows a schematic, partially sectioned perspective illustration of a coordinate-controlled moving adhesive discharge device 41 with an attached

Applicator head 43 according to the invention in use for r bonding a multi-pane insulating glazing 45 in a window frame 47. Its inner surface forms a Klebefalz 47a, which on one side a gap 47b beg rents, whose other limita- tion by a front side 45a of

Insulating glazing (glass pane assembly) 45 is formed.

It is shown how from the Appl lkatorkopf 43, a first adhesive beam 49a with a relatively large inclination to r horizontal runs u nd after hitting the vertical fold portion 47a there builds a kind of boundary wall, the more horizontal and nd with less pressure exiting u and down running second adhesive beam 49b with larger

Thus, with suitably coordinated cross-sections and discharge pressures and a suitable speed of the adhesive discharge device along the frame, the adhesive gap 47b largely forms from adhesive melt 49a, 49b into the adhesive gap 47b It is intended that the adhesive layer will be filled only in the upper region and that it will cure optimally after curing

Arrangement and procedure; however, here is an embodiment of a cylindrical applicator head 43 'of the prismatic embodiment of FIG. 4 placed on the Klebstoffaustragvorrichtu ng 41. The first and second discharge channel are sketched here, but not separately designated. The gluing is sketchy in its final

Cross-sectional shape, which conflate with each other

formed previously discharged adhesive jets 49a and 49b. Fig. FIG. 6 schematically shows a frame profile 47 'whose shape differs from that of the frame profile of FIG. 4 and FIG. 5 deviates so that the frame fold 47a 'nu r on one side of an upright

Frame section is limited u nd hierdu rch a different approach to the application of adhesive is made possible. The guiding of an applicator head 60 "here likewise modi fi ed modally takes place here over the folding surface 47a 'in such a way that the adhesive is sprayed onto it at an acute angle to the folding surface like the one in Fig. 1 to 3 in their construction shown applicator heads two discharge channels 65 and 67 nd each with a Austragöffnu ng 65 a and 67 a, wherein the cross section of

Discharge channels 65 and the surface of the associated discharge opening 65a are smaller than the cross section of the discharge channel 67 and the associated discharge opening 67a. However, the discharge ports 65a, 67a are in

Längsrichtu ng the Appliaktorkopfes and in its advancing direction A along the Rahmenprofis 47 'arranged one behind the other. In the interior of the applicator head 60, both discharge channels 65, 67 are combined and open into a common inlet opening 63, to which the outlet (not shown here) of an adhesive syringe or separate mixing device can be applied.

On the in Fig. 6 outlined manner, a profiled adhesive strip 49 'is produced on the frame fold 47a' to such an extent that initially d

Spraying of adhesive from the first discharge opening 65a with the smaller cross section, a kind of boundary web is formed, which solidifies very quickly due to the small cross section. This then constitutes an effective limitation for one subsequently from the second

An unwanted bleeding of the discharged from the second Austragöffnu larger amount of adhesive (ie, the qûerschnittsbedingt slower solidified than the first adhesive discharge) to m upstanding portion of the frame profile is thus effec completely prevented. The method may (as shown in the figure) with horizontal orientation Folding surface, but also be executed with vertically aligned folding surface.

The embodiment of the invention is not limited to these examples, but also in a variety of modifications possible, which are within the scope of professional action.

Claims

WO 2013/030271 PCT / EP2012 / 066853

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claims

Applicator head (10; 20; 30; 43; 60) for placement on a

Reservoir (41) or a mixing device, in particular for this purpose to fill an elongated deep gap (47b) from an access area located laterally of the gap with an adhesive or sealant, wherein the applicator head with a

Output (11; 21; 31) of the reservoir or the mixing device connected to the first discharge channel (15; 25; 35; 65) having a first discharge opening (15a; 25a; 35a; 65a) and a second discharge channel (17; 27; 37; 67 ), wherein the first discharge channel and the first discharge opening have a substantially smaller cross-section than the second discharge channel and the second discharge opening.

Applicator head according to claim 1, wherein the reservoir (41) or the mixing device as an adhesive reservoir or adhesive mixing device for industrial or construction site use and to provide a ready-mixed adhesive at the output (11; 21; 31) are formed.

Applicator head according to claim 1 or 2, wherein the first discharge channel (15; 25; 35; 65) and the second discharge channel (17; 27; 37) are fed together from a single outlet (11; 21; 31) of the reservoir or the mixing device ,

The applicator head according to any preceding claim, wherein the cross-sectional area of the first discharge port (15a; 25a; 35a; 65a) is 50% or less of the cross-sectional area of the second discharge port

Discharge opening (17a; 27a; 37a; 67a) is.

WO 2013/030271 PCT / EP2012 / 066853

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Applicator head according to one of the preceding claims, wherein the first and second discharge channel and the associated discharge opening each have a circular cross-section.

Applicator head according to one of the preceding claims, wherein the extension plane of the first and / or second discharge opening with respect to the longitudinal axis of the respective discharge channel has a smaller angle than 90 °, in particular an angle in the range between 30 ° and 60 °, more particularly an angle of 45 ° ,

10

The applicator head according to claim 6, wherein the extension planes of the first and second discharge ports are common to an end face (19; 29; 39) of the applicator head which is inclined to the longitudinal extent of the first and second discharge passages.

Applicator head according to one of the preceding claims, wherein an opening in the first (25a; 35a) and second discharge opening (27a; 37a) end portion of the first (25; 35) and / or second discharge channel

(27; 37) curved or opposite to the exit of the

Reservoir or the mixing device adjacent the beginning portion of the respective discharge channel is angled.

The applicator head according to claim 8, wherein the end portion of the second discharge passage (25; 35) is more curved or angled than the end portion of the first discharge passage (27; 37).

The applicator head of claim 9, wherein the end portion of the second discharge channel is angled at 60 ° to 90 ° and the end portion of the first discharge channel is angled at 30 ° to 60 °.

11. Plant for the production of glazing elements, in particular insulating windows with multiple glazing, with a

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An adhesive discharge device (41) comprising an applicator head (43) according to any one of claims 1 to 10.

Method for producing a glazing, in particular an insulating window with multiple glazing, wherein a frame rebate (47a; 49a ') adjacent to one to be inserted into it

Glass pane assembly (45) by means of a

Klebaustragvorrichtung (41) adhesive or sealant is applied, which an applicator head (43; 60) according to one of

Claims 1 to 10.

The method of claim 12, wherein the application of the adhesive or sealant, in particular as filling a gap between the Rahmenfalz (47a, 47a ') and the glass sheet assembly (45) by the applicator head (43; 60) on the surface of the Glass pane assembly or mounted on a frame side surface and is guided on the frame along the frame, wherein the applicator head is formed and / or positioned so that the first discharge opening (15a, 25a, 35a, 65a) below or in the feed direction in front of second discharge opening (17a; 27a; 37a; 67a) is placed.