FI58384C - TAX IDENTIFICATION FOR FLOW DEPOSIT SOM TJAENAR SOM MELLANLAEGGSLIST SAMT ANORDNING OCH FOERFARANDE FOER FRAMSTAELLNING AV LISTEN - Google Patents

Description

rRl ANNOUNCEMENT _λ „λ jOjl ™ ^ UTLÄGGN INGSSKRIFT 5 8 3 8 4 C | 4b? atontti granted ·: · t ty 12 01 1931 Patent neddelst (51) Kv.ik.Wci.3 E 06 B? / 66 // C 03 0 27/12 FINLAND —FINLAND (M) P * · "*» ”1 · * ·" * 1 · - P «t« n <»iw5fcmnt 753 ^ 83 (22) Hikemlipllvl — Ameknlnpd ·! 10.12.75 (23) AlkupUvl — GlMghuttdag 10.12.75 (41) Tullut Julktouktl - Bllvlt offuntllf 12.06.76 PMMtti. And the architectural board NlkMM ^ J. Mj.lU.n

Patent- och reglstervtyrelMn · AimMcm utk «d ock utUkriftM pubiicand 30.09.o0

(32) (33) (31) Requested etuollwitt — fefird priorket 11.12.7U

France-France (FR) 7M0Ö24 (71) Saint-Gobain Industries, 62, Bd Victor-Hugo, F-92209 Neuilly sur Seine, France-France (FR) (72) Pierre Chenel, Enghien les Bains, Michel Moncheaux, Chalon sur Saone, France-Frankrike (FR) (7 * 0 Berggren Oy Ab (5 * 0 Sealing strip for intermediate windows and device and method for making the strip

The invention relates to a sealing strip acting as a spacer strip arranged along the edges of a sheet in the manufacture of multiple windows comprising at least two transparent or translucent sheets separated from each other by said list of sheets comprising a mixture of polyisobutylene, butyl rubber, carbon black and carbon black, carbon black, carbon black . The invention further relates to an apparatus and method for making a list.

In the following, multiple windows consisting of glass sheets are explained in particular, but this does not mean that the invention is limited to such windows only.

It is known that spacers act as a seal with a dual function: on the one hand, they ensure the tightness of the air spaces between the glass sheets, preventing vapors and dust from entering the atmosphere, and on the other hand, they keep the glass sheets firmly in place at the desired distance from each other.

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Known spacer strips consist of an inner strip of polyisobutylene type plastic and an outer strip of silicone or polysulfide elastomer type plastic. This putty is sprayed between the plastic strip and the edges of the glass sheets, and thanks to its excellent adhesion properties, it keeps the sheets in the correct position, while helping to ensure tightness.

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The internal list, on the other hand, works e.g. as a spacer, keeping the plates apart so that the desired air space is obtained between them.

To ensure the absorption of moisture contained in the air layer separating the two glass sheets, a desiccant such as silica gel, levilite or a substance belonging to the group of molecular sieves is added to the inner strip.

The spacers of multiple insulating window panes can be made from needles of hot-melt and self-adhesive "hot melt" type material, and such spacers can achieve relatively large distances between the glass sheets. However, the manufacturing process has not yet been fully automated.

Instead, extruded moldings are particularly well suited for automatic manufacturing. In addition, automatic machines and mechanisms for placing the inner strip and the outer putty layer are described in French Patents 74 3 ^ 156, 74 34334, 74 34640, 72 28403, 72 45076, 72 42468.

When calculating thick strips automatically, for example by means of the machines described in the aforementioned patent publication 72 42468, it is necessary that the plastic material has such special properties, in particular viscosity, that it allows it to be extruded and ensures good adhesion to glass.

Indeed, good results have been obtained with plastic strips with air layers with a thickness of about 5-6 mm, but when these thicknesses are exceeded, strips of a known type may deform, so that they can no longer satisfactorily act as spacers and seals. Similarly and analogously to the air layer between the plates, the thickness of the spacer strip is called the dimension measured in a direction perpendicular to the surfaces of the plates on the screen.

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The sealing strip according to the invention, the features of which appear from the following claims 1 to 4, avoids the difficulties which have arisen.

It is true that it is known from the Finnish patent application 1448/71 to use a sealing strip, one of the components of which is e.g. butyl rubber having a viscosity of 1 to 8 minutes at 100 ° C min. 4l and max. 49. However, such a sealing strip does not achieve the desired properties obtained with a sealing strip according to the invention, the viscosity of which is a mixture of all the substances according to claim 1 above 115 ° Mooney after eight minutes at 40 ° C.

The viscosity of the sealing strip material mixture according to the invention and the composition of the strip provide the property that the strip adheres the multi-window sheets, in particular the glass sheets, very well together, in a way "wetting" the glass. “6 mm.

From the point of view of the properties of the sealing strip, it is advantageous if the weight ratio of polyisobutylene and butyl rubber in the mixture is between 4: 1 and 8: 1, most preferably about 6: 1.

Given the physical properties of the list - viscosity and glass adhesion - it is important that the list is always lowered at a well-defined angle to the plane of the screen. The features of the sealing strip manufacturing device appear from claims 5 and 6 and the features of the strip manufacturing method from claim 7.

The angle between the nozzle used in the manufacture and the plate, which is between 15 and 45 °, is not just a simple consequence of the viscosity of the sealing strip. After all, the viscosity of the sealing strip must first be such that the glasses adhere to each other, but the strip must also remain in place without collapsing.

If the strip-forming composition were extruded perpendicular to the plane of the sheet, the strip would tend to collapse. If, on the other hand, 4 58384 extrusion were carried out with a die parallel to or less than 15 ° *, it would be practically impossible to obtain a thick sealing strip to adhere to the glass sheet in particular, which is a function of numerous parameters: in particular glass surface condition, glass temperature and flow rate. So such boundaries are needed for the angle in question, which is not a matter of course. This angle is provided by the device according to the invention.

Compared to the method shown in Finnish application 1448/71, the method according to the invention is considerably simpler. According to the invention, only one list is arranged on one of the plates. The second plate is placed on this, and pressed onto it, whereby, for example, the double window is ready. Po. According to the Finnish application, instead, two strips must be fitted to the inner surfaces of the double-glazed units, a continuous film, i.e. a thread, which adheres to the glass and is moisture-resistant, and another dewatering member fitted to the inner surfaces of the glass sheets.

Other advantages and features of the invention will become apparent from the following description with reference to the accompanying drawing. In the drawing: Fig. 1 is a sectional view of a double pane with a considerably thick spacer strip, Fig. 2 shows a curve illustrating the material of the spacer strip

The change in Mooney viscosity at 40 ° C as a function of time, Figure 3 shows a curve illustrating the material of the spacer strip

The change in Mooney viscosity after 8 minutes as a function of temperature, Fig. 4 is a side view, partially sectioned, of the extrusion head and compression die used to calculate the spacer strip, Fig. 5 is a cross-sectional view of the extruder head of Fig. 4 -V cross-sectional view, and Fig. 7 is a vertical brain view of the entire height adjustment apparatus of the extruder.

Figure 1 shows a double pane comprising glass sheets 1 and 2, with a spacer strip 3 between them and separated by an air space 4.

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The glass sheets 1 and 2 are held in place by an outer polysulfide layer 5.

The double panes, which are intended to ensure good thermal insulation, must have an air layer 4 with a large thickness, and therefore the thickness e of the strip 3 must be large in relation to its height h.

In the automatic manufacturing process in question according to the above-mentioned patents, the strip 3 is deposited immediately on the sprayer on one of the glass sheets, for example sheet 1, immediately from the spray nozzle. The second glass sheet 2 is then . The outer layer 5 is then layered in place between the two glass sheets 1 and 2, on the strip 3 and on the edges 6 and 7 ·

It has been found that it is possible to automatically calculate a plate with a thickness exceeding 4 mm and up to and including 19 mm using mixtures with a Mooney viscosity of more than 115 ° after 8 minutes at 40 ° C in an experiment carried out according to the French standard NPT 43005 using a Mooney consistometer. For example, for a list consisting of: - polyisobutylene: 50% - butyl rubber: 10% - carbon black: 17.5% - levolite: 20% - molecular sieve: 2.5 ί and subjected to shear tests in connection with said experiment, it was possible to draw in the figures 2 and 3 are plots of viscosity as a function of temperature and time.

It can be seen that at 40 ° C, after 8 minutes, the viscosity of this compression mixture is even higher than 115 ° Mooney.

Such a strip can be lowered automatically onto a glass plate at a speed of at least 30 cm / s because of its sufficiently good adhesion to glass and because it remains deformed up to thicknesses of 19 mm and even larger.

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The counting of the strip is performed by a method according to the invention, which comprises feeding the strip to one of the glass sheets in such a way that its center line forms an angle α with the counting line between 15 and 45 ° and preferably between 25 and 35 °.

Fig. 4 is a side view, partly in section, of the extrusion head and the extrusion die and showing their position relative to the glass sheet on which the spacer strip is extruded. On the other side of the extrusion head 11 there is a compression nozzle 12, the center line Z-Z 'of which, at the same time, is the center line of the strip 13, forming an angle α with the glass sheet of between 15 and ^ 5 °. On the same side of the extrusion head, the support 15 supports an actuating cylinder 16 which moves a cutter 17 intended to cut the strip when this is lowered onto all four edges of the glass plate 14. The glass plate, in this figure, supported by the conveyor not shown, passes through extrusion die 12 under the direction of the arrow f.

A turning device, not shown, makes it possible to fit the four edges of the glass plate in turn under the nozzle.

The angle α can be set between 15 and k5 ° to ensure the correct position of the strip and the correct adhesion on the glass sheet, as a function of numerous parameters such as temperature, state of the glass surface, its travel speed, etc.

This arrangement can be performed with a device according to the invention, which allows the extrusion head 11 to be rotated about its longitudinal axis.

It can be seen from Figure 5 that the extrusion head 11 as well as the extruder body 18 are provided with conical flanges 19 and 20. Inside the head 11 and the body 18 there is an extrusion coil 21 which compresses the plastic of the strip and then feeds it into an extrusion channel 22 not shown in this figure) compression nozzle 12. The extrusion head 11 and the extruder body 18 are kept in contact with the sling 23 ·

Figure 6, which is a section of this combination along the line 7 58384 VI-VI in Figure 5, shows that the flanges 23 consist of two flange halves 24 and 25, each having an axial pin 26 and 27 connected by a bracket 28. At bolt 29 these two the western half can be tightened against each other. As shown in Figure 5, both side halves have a conical internal profile corresponding to the profile of the sides of the flanges 19 and 20.

It is easy to understand that when the bolt 29 is loosened, the position of the extrusion head 11 and thus the angle o can be adjusted and that by tightening the bolt 29, said end can be locked, thus providing a seal between the extrusion head 11 and the extruder body 18. However, when setting the angle α, it is necessary to change the distance between the tip of the glass plate 14 and the tip of the compression nozzle 12. In order to maintain optimal operating conditions, it is recommended that this distance can also be set and locked to the desired size. This is achieved by the device according to the invention, which is shown in Fig. 7. It can be seen from this figure that the extruder assembly 30 is supported by a pallet 31 which can be rotated on a shaft 32 by means of a beam 33. The shaft 32 is supported by a stationary frame 32 '. The motor 34 rotates an extruder, which includes, but is not limited to, an extruder body 18 and an extruder head 11 that supports the extruder 12 on its front end.

Reference numeral 35 generally denotes a conveyor whose function is to cause the glass sheet to pass under the compression nozzle and which rotates 90 ° each time the strip is lowered to one edge.

This combination, which has long been known in the glass industry and therefore does not fall within the scope of the invention, will not be explained in more detail.

Attached to the left-hand portion of the conveyor 35 is a threaded rod 37 having a height-adjustable stop 38 which can be fixedly secured in place by two nuts 39 and 40.

This response 38 will lean against a stop attached to the extruder 30 4l, when the platform 31 will tend to rotate in the direction of the arrow g of the influence of the compression spring 42. As can be seen, to adjust the distance between the compression nozzle 8 58384 and the glass plate 14 supported by the conveyor 35, it is sufficient to tighten or open the nuts 39 and 40 to cause the stop 38 to rise or fall.

Claims (2)

9 58384 1. Tätningslist som tjänar som mellanläggslist, anordnad längs kanterna av en skiva vid framställning av flerdubbelfönster om-fattande ätminstone tvä. transparent or translucent skivor (1, 2; 14) in which the skylate is present at the periphery of the peripheral list (3; 13); (e.g., 13) up to a maximum of 40 ° C at a temperature of 40 ° C to 115 ° Mooney, and up to a maximum of 40 ° C to 70% butyl rubber 5 - 17, 5 # piston rod 10 - 40% colloidal silicon 0 - 20% molecular 0 - 5% A sealing strip acting as a spacer strip, arranged along the edges of the plate in the manufacture of multiple windows, comprising at least two transparent or translucent plates (1, 2; 14) held apart by said strip (3; 13) arranged on the perimeters of the plates, which strip is a mixture , containing polyisobutylene, butyl rubber, carbon black, levolite and a molecular sieve, characterized in that the viscosity of the mixture (3; 13) is such that after eight minutes at 40 ° C it is more than 115 ° Mooney, and that the list of mixture contains said substances by weight as follows: polyisobutylene 40-70 # butyl rubber 5 ~ 17j5 # carbon black 10-40 # colloidal silicon 0-20 # molecular sieve 0-5 #. Sealing strip according to Claim 1, characterized in that it has the following composition: polyisobutylene 50 # butyl rubber 10 $ carbon black 17.5 # colloidal silicon 20 # molecular sieve 2.5 #. Sealing strip according to Claim 1 or 2, characterized in that the weight ratio of polyisobutylene to butyl rubber in the mixture of strip (3; 13) is between 4: 1 and 8: 1, most preferably about 6: 1. Sealing strip according to Claim 1, 2 or 3, characterized in that the sealing strip (3; 13) comprises a molecular sieve formed by mixing two molecular sieves, one with adsorption pores of the order of 4 Å and the other with the order of 10 Å, in the following proportions: 4 Ä-screens 0-4 of the total weight of the # list, 10 A-screens 0-1 of the total weight of the # weight list. Apparatus for producing a sealing strip according to claims 1-4, characterized in that it comprises an extruder whose head (11) is mounted for rotation relative to its body (18) and whose position can further be adjusted in height relative to the plane of its plate (14) , on which the extruded strip (13) is calculated. Device according to claim 5, characterized in that the extruder end (11) and the body (18) have a conical flange (19, 20), which flanges are fastened to each other by a flange (24, 25) having an internal profile of said flanges (19). , 20. corresponding to the profile of the conical sides against which they rest. Method for producing a sealing strip according to Claims 1 to 4, characterized in that the compression nozzle (12) directed towards the end of the strip (13) forms an angle with the transparent or translucent plate (14) of between 15 and 45 °, preferably 25 and Between 35 ° tn. 2. The list of compounds in paragraph 1 is based on the following conditions: polyisobutylene 50% butyl rubber 10% collar 17.5% colloidal silicon 20% molecular weight 2.5%