FI63817C - FOUNDRY FOER FLERSKIVS-ISOLERGLAS SAMT FOERFARANDE OCH ANORDNING FOER DESS FRAMSTAELLNING - Google Patents

Description

r— 1 ΤνΛ ANNOUNCEMENT s-ZQA n jSBTi [B] (11) UTLÄGGN | N0SSKMPT 63817 • gi§ c << *) pr: ':: - 13: j 191: 3 3 3 E 06 B 3/66 v ( 51) Kv.lk./lnt,Cl.

// C 03 c 27/12 FINLAND —FINLAND (21) Pmnttlh «k« mui-PaMn «M« eiaiin «783113 (22) H» k «mi * clouds - Aiwftkninpdat 12.10.78 * * (23) AlkupUvi —GHtl (h «tadi | 12.10.78 (41) Tulkit JulklMkd - Wlvft offuncNg 16. OU. 79

Patented and Registered .... ...._____. . .

. . (44) Date of issue |

Patent · och registerstyrelsen '' Aiweka »utiugd oeh wijkriftm pubticMd 29. OU. 83 (32) (33) (31) · β »ΙΐΜυι —feglrd prlorltM 15.10.77 O5.O7.78 Federal Republic of Germany-Förbunds-republiken Tyskland (DE) P 27 ^ + 6607.5, P 2829 ^^ - 2 (71) Julius Se August Erbslöh GmbH & Co., Rauer Werth U, 5600 Wuppertal-Barmen, Federal Republic of Germany-Förbundsrepubliken [jyskland (DE) (72) Hans Brooking, Wuppertal, Federal Republic of Germany-Förbundsrepubliken lyskland (DE) (7 * 0 Oy Kolster Ab (5M Spacer for multi-pane insulating glass and method and apparatus for its manufacture - Avständshällare för flerskivs-insulerglas samt för-, farande och anordning för dess framställning

The invention relates to a spacer for multi-pane insulating glass and to a method and apparatus for making such or similar spacers. In this case, the invention starts from a previously known spacer consisting of a hollow profile arranged as a frame, on both outer side surfaces of which the glass panes can be pressed, the inwardly directed profile wall being substantially flat and provided with holes and the profile cavity filled with desiccant.

It is known from DE patents 1 434 175 and 1 509 170 to assemble hollow profiles with suitable corner joining means into a frame on the outer surfaces of which the glass sheets can be pressed, whereby a particular problem arises . This cavity is filled with dry gas, e.g. air, etc. The penetration of steam into this cavity would lead to unfavorable condensation phenomena.

SE-A-391 372 discloses a U-shaped spacer which is made by placing a profile tube on the edge of a glass sheet and bending it together with the glass sheet around a fixed pin to form a frame. The connection point of the profile pipe is located at the beginning of the corner bending. According to the present invention, a profile tube of a certain shape is first filled with a desiccant and then bent and the joint is placed in the middle of a straight frame side.

A completely satisfactory solution to eliminate this problem has not been invented before.

Although the edges of the insulating joints are joined to the frame-forming spacer by an adhesive or the like, which on the one hand glues the adjacent plates of the frame of individual profiles and on the other hand seals the whole joint outwards, more or less steam has been shown in practice. This is apparently due to the installation of a corner joint of hollow sections cut to different lengths, the joints of the profiles of which are not in such a position as to be sufficiently resistant to moisture diffusing inwards from the outside.

So far, no attempt has been made to eliminate these shortcomings. In the proposal according to DE patent 1,509,170, an attempt was made to obtain a thicker structure for the sealing compound by chamfering the corner joint angle in order to prolong the diffusion distance of the moisture penetrating from the outside into the inside. In practice, this company was left without a substantial result. Therefore, additional gluing, soldering and similar corner area treatments were forced to be carried out, which, however, caused a very large increase in manufacturing costs without being able to achieve a completely satisfactory result.

The invention is now based on the object of developing a spacer for a multi-pane insulating glass window as well as a method and an apparatus for making it, which spacer ensures less improvement in vapor transmission, especially in corner areas, and which ensures perfectly even pressing of the panes on the spacer side surfaces.

3 6381 7 Since the spacer according to DE 1 501 170, the invention is characterized / that the desiccant-filled spacer consists of at least one extruded profile tube bent at the frame corners with a closed circumferentially sealed peripheral wall, the connecting ends of which are located in a straight line.

In connection with the object of the invention, the corner joints used in the prior art are thus avoided.

According to the invention, instead of corner joints, a closed cross-sectional, tubular extrusion profile is used, which, due to being filled with desiccant, can be bent to shape so as to ensure even and tight pressing on the side surfaces of the spacer frame. The joint is as far as possible from the bent frame corners where less stresses occur. Therefore, it is not only possible to seal and seal the joint by known means, but it is also possible to insert suitable connecting elements, preferably made of synthetic material, which are inserted into the pipe ends in place of the desiccant in the area of the pipe ends, since no extrusion profile is formed in these areas. Thus, since the individual parts of the spacer are assembled from one and the same extrusion profile tube, the tube ends can be connected to each other very tightly and firmly at the joints. The connecting elements in question are not the subject of the invention.

In a preferred embodiment of the invention, the extrusion profile tube has a substantially rectangular cross-section, the outer edges of which are strongly chamfered. This cross-sectional shape provides, on the one hand, flat indentation surfaces for the squares and, on the other hand, wedge-shaped cavities for the sealant outside the frame, this cross-sectional shape being particularly well suited for bending operations. However, the invention does not exclude cross-sectional shapes of the pipe, e.g. a semicircular pipe, for forming spacers.

It is a further object of the invention, within the scope of an embodiment, that the bending radius of the extrusion profile tube is selected so that the bent area is covered by glazing strips or the like fixing the insulating glass panes.

6381 7

A particular advantage of the spacers formed according to the invention is that they can be manufactured in a very simple and time-saving manner and therefore cost-effectively.

A particularly preferred method of making such spacers, but which can also be used to form other spacers, is characterized in that the extrusion profile tube is guided in a bending plane along the bending device to a stop at a distance from the bending device corresponding to an adjacent, in particular distant, first frame, then and that the extruded profile tube with its bent ends is then moved to the length of the adjacent frame side against the response shifted relative to the bending device, followed by a second 90 ° bending operation, and finally the extruded profile tube is cut at a distance from the bending device to

In this case, it proves to be particularly expedient if the two extrusion profile tubes are bent together so that they overlap one another. In this way, it is ensured that the frame parts bent into a U-shape, the branches of which have the same length, are connected in a mirror image by turning the second frame part into exactly the appropriate spacer frame.

The invention also offers the possibility of bending only the frame corner, whereby the distance of the response from the bending device corresponds exactly to the distance of the cutting device from the bending device. In this case, only precisely cut, straight «qnilafoapnr '» «profile profiles with bent frame corners need be connected. The shape accuracy of the frame is also improved if the two extrusion profile tubes are machined together in such a way that they overlap one another.

Another, very advantageous method step of the invention consists in that the bending is carried out in an oblique plane, the inclination of which with respect to the horizontal is preferably of the order of about 30 °.

The pipe sections to be bent slide along this oblique plane, in which case it has been shown that in this inclined bending plane the smallest resistance is caused to the pipe sections to be moved along it.

5 63817 This makes it possible to use precisely machined pipe rods, as it is possible to connect the remnant of the rod to parts already bent in advance using connecting means. In the region of such joints, the spacer pipe itself would be unstable during the bending event along the labile bending plane. However, as a result of the inclination of the bending plane, the resistors corresponding to the movement of the pipe in the bending plane are relatively small. All you have to do is make sure that when joining the pipe, the connection point is in the right place in the spacer.

In another embodiment of the method according to the invention, it is shown that in connection with the cutting operation, vibration is caused to a part of the bent spacer located in the area of the bending device. This operation results in the desiccant inside the tube flowing away from the end of the tube due to vibration and therefore creating a space for the insertion of the connecting means.

This vibrating operation further has the advantage that the joining of the bent spacers on one work surface formed by the bending plane to form a closed frame can take place immediately in connection with the bending operation. Therefore, exchanges between the bent frame parts are impossible. These can arise when bent frame parts are taken from stock and assembled at another workplace.

A suitable device for carrying out the method according to the invention and for producing the spacer holders according to the invention is defined in the claims and described in the drawing.

In the drawing, the invention is schematically illustrated by means of application examples. In the drawing, Fig. 1 shows a spacer frame according to the invention, Figs. 2-4 a schematic bending method for manufacturing a spacer frame according to Fig. 1, Fig. 5 a cross-section on an enlarged scale of is an oblique bending plane, Fig. 9 is a partial cross-section of a working plate of a bending machine with a movably operated stop, Fig. 10 is a longitudinal section of the working plate in the area of the bending device; XIV, Fig. 13 is a top view of another embodiment of the invention, Fig. 14 is a cross-sectional view of the spacer of Fig. 1, and Fig. 15 is a top view of one corner of the matched multi-pane insulation glass arrangement.

The spacer 1 shown in Fig. 1 has bent frame corners 2 and consists of two frame parts 6, 7, which are connected at the connection points 3, 4 by means of conventional connection elements 5.

The frame parts 6, 7 are formed of a single extrusion profile tube, the cross-section of which in one embodiment is illustrated in Fig. 5. The interior of this extrusion profile tube is filled with a desiccant 24 already placed in the tube before bending the frame portions 6,7. The curvature of the bent frame corners 2 is then chosen so that the corners of the profiles holding the multi-pane insulating glass cover the curvature. Conventional sealing is performed in the area of the joints 3, 4.

The frame halves 6,7 are now bent so that the connection points 3, 4 in each case have equal distances y 'and y' 'from the nearest frame corners 2. In this way it is possible to bend and cut each frame part 6,7 together. Then only one of the frame parts 6.7 needs to be rotated 180 ° in order to be able to assemble the two frame parts 6.7 together in a perfectly shaped way into the closed frame shown in Fig. 1. The total height y of the frame 1 is obtained from the branch lengths y 'and y ". The width of the frame 1 is denoted by the reference symbol x.

The example of Figures 2-6 describes the individual method steps for making the spacer of Figure 1.

The extrusion profile tube 18 is pushed along the guide track 13 to the stop 14, whereby the bendable part 6 is guided through a bending device 12 schematically described as a roll 16 and a pivotable bending element 17. When the bending element 17 is rotated 90 ° around the roll 16 counterclockwise (cf. dotted a turn of 90 °, whereby the distance of the stop 14 from the bending device 12 is dimensioned so as to obtain a branch length y '6381 7 (cf. Fig. 1). It is self-evident that the die-compression profile tube 18 is held on the other side of the thinned part y ', in a conventional manner, during the bending operation.

After the first bending according to Fig. 2, the stop 14 is moved with respect to the bending device 16 along the guide track 13 and the detached extrusion profile tube 18 is pushed at an angle with the bent frame part 6 again against the stop 14. Starting from the example of Figure 1, then the distance x of the stop 14 from the bending device 16 corresponds to the width of the spacer frame 1 indicated in Figure 1. After tightening the extrusion profile tube 18, a second 90 ° bend is performed so that the bent extrusion profile tube 18 comes to the position shown in Fig. 4. At a distance y '' from the bending device 16 there is a rotating saw blade 15, by means of which the tensioned extrusion profile tube 18 is cut. * As can be seen from Figure 3, the distance ratio between the saw blade 15 and the stop 14 is also maintained. It is expedient to assume that the distance y'1 of the saw blade 15 from the bending device 16 remains constant. Then it is only necessary to move the response along the guide path 14 the required amounts x and y '. To this end, it is expedient to make the actuator for the movement of the stop 14 quite precise in order to achieve the required tight tolerances. If it is necessary to produce frames of different widths and heights by means of the described bending device, it is recommended to use electric control to adjust the response 14. For example, a decadent switch can be used on the x- and y-axes for the desired distances, the use of which is stationary, especially in test bending or backup operation. For continuous production, it is recommended to use a hole strip reader with an indication unit for two axes. Each shaft is calibrated by means of correction switches so that in connection with the introduction of the frame material, the stop 14 is moved to the corresponding position. A position motor with a high-speed switching and a slow-running switching can be used to drive the stop 14, whereby the distances traveled can be measured with an angular step sensor.

Suitable devices for carrying out this method are described in Figures 8-12 in application examples.

The problem with bending the extruded profile tubes 18 is that no deformation occurs in the area of the bent frame corners 2 (cf. Fig. 1) which prevents the glass panes from being pressed 6381 7 in running grooves 21 which are essentially decorative in nature and are therefore not necessary. In the central region of these outer surfaces there is a through, deeper and therefore wall-thinning groove 22. The thinned wall zone thus formed has a number of small openings 23, e.g. perforations, which allow air or other gases between the glass panes to enter the desiccant 24. the thinning groove 22 may also be formed inside the wall 20.

The extrusion profile tube 18 of Figure 5 has a thicker wall region 25 and a thinner wall region 26, which allow the thicker wall portions 25 in the compression or tension region to remain flat and shape-shaped after the bending operation, while the thinner wall regions 26 do not act laterally in this case, lateral bulges are obtained, but remain planar and thus ensure a tight depression of the glass panes.

As the material for the extrusion profile tube 18, an alloy of Al Mg Si 0.5 is preferably used. This alloy is subjected to a conventional heat treatment in order to bend the extrusion profile tubes made of it on the one hand without breaking them and on the other hand to perforate or slit the area of the wall thinning 22.

Figures 6 and 7 show vertical and horizontal longitudinal sections of two frame parts in the area of the connection points 3, 4, in which case conventional connection elements 5 are used at the ends of the individual pipe parts 18. In this example, the individual connecting element 5 has a separating strip 28 in the center, the circumference of which corresponds exactly to the cross-section or circumference of the individual pipe 18.

It is now a problem to insert these connecting elements 5 into the tubes 18, which are still filled with a desiccant 24 during the bending operation, which of course must remain inside the frame 1.

But it would be cumbersome to remove the desiccant 24 from the area taken up by the connecting elements 5, because then there is no precise control over the amount of desiccant 24 removed.

Therefore, according to the cutting method described in Fig. 4, the rotating saw blade 15 causes vibration in the bent frame part 9 6381 7 6, 7, the intensity and duration of which determine exactly how much desiccant flows out of the pipe end which the saw opens. Due to the fact that this vibration is performed in a bending machine, it is possible to push the connecting elements 5 inside the pipe ends of the parts 6, 7 immediately in connection with the bending operation and thus prevent further emptying of the pipe. At the same time, it is possible to connect the frame parts 6,7 made in the bending machine inside the bending machine to a closed spacer frame 1.

In a partial cross-section of Fig. 9, reference numeral 29 denotes a working plate of a bending machine (cf. Fig. 8), the surface of which forms a bending plane 34 along which the frame parts 6, 7 are moved in the bending method according to Figs. At the edge of the work plate 29 there is a schematically marked guide track 13 which runs in the plane of the bending plane 34 and on which the extruded profile tubes 18 to be bent are pushed. In the embodiment of Fig. 9, the stop 14 is moved along this guide path 13 by means of a ball roller shaft 32. Reference numeral 31 schematically describes a holder connecting the stop 14 to the area surrounding the ball roller shaft 32. In addition, the stop 14 or its holder 31 is guided on the guide shaft 33 to ensure an accurate plane-parallel displacement of the stop surface. On this abutment surface is, schematically shown, an arrangement switch 30 against which the front end of the extrusion profile tube 18 comes when the tubes are moved against the abutment 14. This arrangement switch 30, the construction of which is known to a person skilled in the art, initiates in the described bending operation the first tightening of the extruded profile tube 18, the first bending operation is performed, the stop 14 is moved to the next bending dimension and the extruded profile tube is released again.

It can be seen from the simplified description of Fig. 10 that it is advantageous to bend the two extrusion profile tubes 18 so that they overlap one another. Fig. 10 further illustrates a guide strip 35 delimiting the guide track 13 of Fig. 9 from the side. Devices that prevent the extrusion profile tube 18 from being lifted off the work plate 29 and the necessary clamping means have been omitted for simplicity. The guide strip 35 is, of course, arranged so as not to prevent the response 14 from moving.

10 6381 7

The example of Figures 11 and 12 schematically illustrates the above-mentioned vibrating device 36, 37. The working plate 29 has a vibrating bolt 36 perpendicular to the bending plane 34, and the free front surface of the bolt acts against the frame part 6 bent from below. The vibrator 37 may be of ordinary construction and connected to the work plate 29.

However, it can be attached to a rack. This vibrating bolt 36 is moved in a longitudinal axis to a oscillating movement which is transferred to the still tensioned frame parts 6 near the bending device 16, 17. As a result, part of the desiccant 24 flows out of the pipe end 40 and the working plate opening below the saw. can again be used later when filling the extrusion profile tube 18.

It now proves to be very particularly advantageous if the bending plane 34 of the work plate 29 is arranged obliquely, as can be seen from Fig. 8. The angle oC formed by the bending plane 34 with respect to the horizontal is about 30 ° in the bending machine tested in practice. Suitably, however, the work plate 29 can be moved to different oblique positions relative to the support 38 in order to obtain the most favorable oblique position for the extrusion profile tube to be machined. Namely, it has been found that in the described bending method, according to Figures 2 to 4, it is also possible to use the remnants of the extruded profile tubes to be machined, so that these are extended to the bent or bendable tube sections by means of connecting elements 5. This naturally raises the problem of how the remainder of the extrusion profile tube 18, thus extended, behaves when both bending operations according to Figures 2-6 are performed, assuming that the frame parts 6, 7 slide along the bending plane 34 and thus have to overcome frictional resistance. It has now been found that the oblique position of the work plate 29, and in particular the angle of this oblique position, is the reason why such extended extrusion profile tube sections do not break at the joints during the bending operation, which would be expected per se.

The invention is not limited to the oblique position and the exemplified 30 ° angle. Rather, one skilled in the art will adjust the position of the most favorable bending plane 34 in each case based on this information.

The work plate 29 is formed so large that the bent frame parts 6, 7 can be assembled on it after they have been sawn crossed without substantially limiting the power of the bending machine. Namely, it has proved that installation immediately after bending in a bending machine, on the one hand, is expedient in order to assemble the spacer frames from exactly matching frame parts 6, 7. On the other hand, immediate installation has the effect that the desiccant 24 in the extrusion profile tube 18 is not unnecessarily for it is known that this desiccant 24 is moisture-binding and would take unnecessarily moisture from the air around the bending machine and thus have a lesser effect when it is in the built-in space in the window.

Fig. 8 further schematically shows that a saw blade 15 with a pivot lever 39, which also has a drive motor for the saw blade 15 and which has to be pivoted so that sawing according to Fig. 4 can only be performed by pivoting down the unit 39, 15. first releases the saw blade 15 when the second bending event is complete, but the extrusion profile tube 18 is still tightened. In addition, a brake device is connected to the drive of the saw blade 15, which immediately stops the rotation of the saw blade 15 after the end of the sawing operation.

In the embodiment of Fig. 15, a single bent extrusion profile tube 18 is described as a spacer 1, which is closed at a connection point 41 in a suitable, known form and sealed. An extrusion profile tube is formed bent in the corners of this tubular spacer 1. It turns out to be advantageous to fit the joint 41 in the region of the straight point of the spacer frame. Likewise, no corner joint means is required in this construction, so that only the extrusion profile tube 18 needs to be bent in such a way as to maintain dimensional accuracy and to ensure sealing against the passage of steam.

As the application example of Fig. 14 shows, the tube 18 consists of an extrusion profile of substantially rectangular cross-section, the inwardly directed wall 42 of which is formed flat. The side walls 43 also have parallel and flat surfaces so that the squares 44 can be sealed along the spacer frame 1. The outer wall 45 of the extrusion tube 18 is provided with strong chamfers 46 from the corner area. These chamfers form a wedge space around the edges 12 6381 7 over the panels 44 into which a sealant 47 is introduced to connect the panels 44 to the die profile tube 18 and seal the space.

The cavity 48 of the extrusion profile tube 1 is filled with desiccant 49. The inner wall 42 has holes 12 so that gases in the interior 50 between the panes 44 and the spacer frame 1 can pass through the holes 51 into the cavity 48 where they release any moisture they contain to the desiccant 49. there may be through-going strips 52 on the inside, as in known multi-pane insulating glass. It is also advantageous to provide the wall 42 with a thinner through the central region and to make holes 51 in it with suitable tools.

The application example of Fig. 15 illustrates a corner area of a multi-pane insulating glass surrounded by glazing strips 53 or stop strips of a frame. This shows that the bending radius 54 of the extrusion profile tube 18 is chosen so that the spacer 1 cannot be seen from the outside in this corner area. Rather, there should be a clear distance between the corners 56 of the glazing beads 53 and the edge inside the spacer 1 in the corner area 55.

Claims (16)

1. Multi-disc insulator glass spacer (1), consisting of a hollow profile composite to the frame, against which both outer side surfaces the glass discs (44) will lie, the interior profile wall being substantially shaped and provided with heel (51) and the profile cavity of which is filled with a desiccant (49), characterized in that the spacer (1) filled with the desiccant (49) consists of at least one extruded profile tube (18) bent in the area of the frame corners (2.55). ) with an enclosed perimeter wall, the abutment points of the pipe ends (3,4,41) are located in the middle of a straight frame side and are known and tapered in a known manner. Spacer according to claim 1, characterized in that the spacer (1) consists of a substantially rectangular extruded profile tube (18), the outer edges of which are strongly inclined (46). A spacer according to claim 1 or 2, characterized in that the bending radius (54) of the extruded tube (18) is selected such that the curved region (55) is covered by the insulating glass slats (44) ) or equivalent. Method for producing spacers according to claim 1, characterized in that the extruded profile tube (18) is advanced in the bending plane (34) along the bending device (12) to a stop (14), the distance from the bending device (12). ) corresponds to the distance of the abutment site (3,4,41) from a nearby location, in particular a farther away corner (2.55), after which the first bending event of 90 ° is carried out and then the extruded profile tube (18) with the bent end is displaced against a stop (14) which from the bending device (12) lies at a distance corresponding to the length of an adjacent frame side, after which the second bending event of 90 ° is carried out, and that finally the extruded profile tube (18) is cut at a distance from the bending device (12) corresponding to the difference in length between the length of the second frame side and the length of the bent tube end. 5. A method according to claim 4, characterized in that two extruded profile tubes (18) are jointly bent so that they lie in a covering relationship with one another. 6381 7 6. A method according to claim 4 or 5, characterized in that the bending event is carried out in an oblique plane, the inclination of which to the horizontal plane is preferably of the size class about 30 °. 7. A method according to any of claims 4-6, characterized in that, in connection with the cutting event, vibration is exerted on the portion (6) of the bent spacer in the region of the bending device (12). 8. A method according to any of claims 4-7, characterized in that the curved spacer parts (6,7) are assembled on a bending plane forming working surface for the estuary arrival of a closed frame. Device for carrying out the method according to claims 4-8, characterized in that along a bending plane (34) in a bending device (12) known per se, a guide path (13) extends for the extruded profile tubes (18). on whose outlet side at calculated on the bending device (12), a stop (14) is controlled adjustably and on whose supply side in front of the bending device (12), a cutting device, in particular a saw (15), is arranged and that the guide path (13) forms the lower edge of the a working disk (29) disposed obliquely to the horizontal plane, preferably at an angle (c £) of 30 °. 10. Device according to claim 9, characterized in that the stop (14) can be programmed by means of a remote controllable drive mechanism, e.g. by means of a ball roller spindle (32). 11. Device according to claim 9 or 10, characterized in that the distance from the stop (14) to the cutting device (15) corresponds to the length of two adjacent sides (x + y "or y" + y ') of the spacer frame dividers. (6.7). Device according to any of claims 9-12, characterized in that the stop (14) has a bending event controlling contact switch (30). Device according to any one of claims 9-12, characterized in that the internal height of the guide path (13) or the thickness of the bending device (12) corresponds to twice the height of the extruded profile tube (18).