DE2306263A1 - METHOD AND DEVICE FOR CREATING GAS CUSHIONS FOR CARRYING DISCS OR TAPES ON THE TOP OF ITS - Google Patents

Description

Hem «?, 8:00 am Munich S3,

Fre! Ligra! Hstra3e 19 ni «llnnnWRahl · Eiaenaclier Straße 17

P.O. Box 1 "Dip" .- ing. H. n. « _{Am Pa} t.-Anw.

Pat.-Anv /. Herrmann-Trentepohl ΓΐϊηΙ. Dhve PrtllArrt Rf »t7li» r Telephone: 39 6011

Telephone: 51013 Uipi. - KüyS. CUUarO öeUIOr ₃₉₈₀₁₂

⁵¹⁰¹⁴ Dipl.-Ing. W. Herrmann-Trentepohl ^398C13

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Bahrpatente Herne PATENTANWÄLTE Babetzpat Munich

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Bayrische Vereinsbank Hünchen ° ^r .1 £ B7 Dresdner Bani; AG Harne 7-520 4SS postal check account Dortmund 553 65

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Munich

Saint-Gobain Industries, Neuilly-sur-Se ine / Erankre i ch

Method and device for producing gas cushions for Wearing washers or ribbons on their top.

The invention relates to a method for producing gas cushions which are intended to have panes on their upper side or to wear ribbons, in particular made of deformable materials and above all made of thermoplastic materials such as glass. The subject of the invention is also a device for carrying out this method.

It is often beneficial to be able to grasp a disc by its upper side alone, be it to keep it in a fixed position to transport with respect to a gripper organ, in the present EaIl of suction cup devices used for trans- ' Port of sufficiently stiff disks can be used without, however, any organ in contact with the one in question

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ORIGINAL INSPECTED

Side in such a way that any marking is avoided, be it to hang them under a fixed device.

In this way, you can not only transfer the disc from one work step to another, but you also have access to its underside in order to be able to work on it. However, the use of gas cushions for this purpose has not been developed, since there are particular construction problems with regard to the construction of the device and the stability of the cushion. ,

The general working principle of the gas pillows that dasu are intended, material discs in. It is well known to wear the plastic state: the device maintains between its active wall and the disc an arrangement of gas cushions, which are in essentially independent zones are subdivided, in the "dynamic equilibrium between inlet openings given cross-section," those with constant Pressure are applied and openings, which through free Passages are formed between the disc and the device; the gas is then sideways or into the Deducted inlet opening separating intervals.

Assuming a correct calculation of the operating parameters, each zone of a disk will be of a given thickness in stable equilibrium near the active wall of the device between its own weight, the mitüeren, self-adjusting, exerted by the gas cushion Pressure and the back pressure prevailing on the opposite side held, the back pressure by means of another

309834/04 2 1

Gas cushion can be obtained, which is p; edoch usually the atmospheric pressure or the pressure given to an adjacent chamber.

Since the gas cushion under consideration is supposed to lift a pane, the underside of which experiences a firm counterpressure, the normally on the order of atmospheric pressure, it must be aspirating; H. the middle one through the pressure exerted on the gas layers forming it must be less than this counter pressure. If one then looks at the general one EaIl according to which the gas used circulates in an open circuit, it means that the outlet of the Gas cushion must be connected to a suction channel that has a negative pressure related to atmospheric pressure has, whereas its supply can take place in the open air. Pressed differently - at least one of the fans, which supply their energy to the device, be arranged on the downstream side of the rope.

Under these conditions it is clear that the various Outlet chambers with the vacuum chamber by sufficient Auxiliary pressure losses are connected, as when this is missing would, when connected to the free atmosphere of any one of them, the vacuum in the device as a whole would collapse.

A generator for a suction gas cushion thus essentially exists from an arrangement of sucking zones, which are fed via sehmale inlet openings and with one Organ for connection to negative pressure via meaabran-like outlet openings are connected, the requirements for the puncture. =:

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2306283

Wise such a device are stricter than an express one blowing pillow, due to the presence of pressure losses between the device and the fan tends to decrease stability during any incident or failure in operation, which leads to a zone of the .Seibe lowers slightly and looks out from the CD support ■ far away, harbors the danger of lapsing into you, which you see can spread more and more. Above all on the one or the other of the edges of the Seheibe to be carried the risk of getting away from there.

The invention also relates to a device with Suction gas cushion with a safe working method, despite. easier Construction and structure.

According to the invention and to avoid having a local Get away from the disc. the edges or at an angle of the device.- does not spread further and further, that The vacuum can collapse and the pane crashes as a result, the underpressure zones of the cushion are also included a stabilization belt is provided, which has an overpressure compared to the ambient pressure ,. For this are the Inlet openings, at least for those of the peripheral zone, with connected to a pantry which supplies gas under sufficient pressure to allow the supporting surface a change of stabilizing zones with overpressure opposite the environment in the vicinity of these openings as well as zongn with negative pressure in the vicinity of the outlet openings knows

Under these conditions a local escape of the. Disk on one edge of the device first to one

garbage trying to get rid of the error and not create a risk of instability.

Of course, it is not essential that the support zones, i.e. the suction zones, be surrounded by a completely continuous belt of stabilizing zones provided with pressurized orifices, provided that the intervals between the stabilizing zones are sufficiently small . It is particularly preferred that the stabilizing zones do not laterally enclose the support zones; In other words, that the alternation of carrier zones and stabilizing zones takes place uniformly over the width of the pane. It thus enables the edges of the disk under the same conditions as the middle portion supported to v / erden.Die successive concludes' ¹ zones may in particular take the form of rectangular areas overlap by

they successively cover the entire width of the device.

According to an advantageous embodiment, the device formed by at least one elongated plate which groups the inlet and outlet openings and the smooth ones The underside carries juxtaposed rows of openings, some with inlet openings, the other are provided with outlet openings and the outer rows are provided with inlet openings which are provided with a supply source with gas of an overpressure, related to the environment, are connected, this plate firmly with a body with Chambers is connected, on the one hand with these openings and on the other hand with these gas feeds in connection

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stand.

The plates or tables can be arranged side by side in a variable number so that they one Form a table that is planar or able to have a certain curvature towards the target, for example the Disk to allow a level change.

The rows of openings - two at a time - are advantageous grouped, each row of ovules being one row of discharges is equivalent to. You can also arrange the openings with respect to each other in a checkerboard manner to the target, each The tendency to avoid marking the disc, be it when approaching the installations or during them Operation. .. -

The plates used can comprise two groups of two complementary rows of openings, the transversal are arranged to the feed direction of the disks or the deformable belt. These rows of openings can be straight and perpendicular to this direction.

According to an advantageous embodiment of the invention is each of the inlet and outlet openings formed by the slot which is free on one hand between a bore in the blackboard with a countersink or free space against the the surface of the panel opposite the discs or the tape is open and on the other hand more corresponding to a plug Leave the form fefe, the one stored in a hole Body and one of the depression or the free space ■ mounted head has, with this stopper over his

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- 7 -
entire length includes a longitudinal section.

This creates a narrow channel over a baffle opens into a chamber of larger cross-section, which is arranged on the side of the head. It is appropriate make this channel by milling flats on one side of the plug; the outer openings of the Combs are presented in a crescent shape and are preferred in that direction essentially -parallel to the the row of openings, d. H. perpendicular to the direction of travel the disc. Desired or random temperature differences can occur between the disc and the Gas streams exist; in order to improve the distribution of these currents, in order to achieve perfect regularity in the To obtain thermal effects, the various crescent-shaped formations can counter this direction around a Be inclined angle which is in principle smaller than 30 ° and preferably-between 0 and 15 °.

The plugs flowing through the various openings can be flush with the surface of the board or level it or be arranged slightly recessed. Partially the inlet and outlet plugs have identical heads; the However, the cross-section offered by the cutout existing on their bodies is in any case larger at the gas outlet than at its entry, such that a less great pressure loss is generated. The ratio of the cross sections can be close to 2.

Exemplary embodiments of the invention will now be explained in more detail with reference to the accompanying drawings

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- 8 ■ will inldenen:

Pig. 1 a vertical section along the line I-I in iig. 4 through such a plate or 'represents such a table;

Pig. 2 shows the transverse pressures in the diagram

Pig. Fig. 3 is a perspective view of the ^: panel in section along the line IJI-III in Pig. 4 ";.

Pig. Fig. 4 is a plan view showing the distribution

the inlet and outlet openings of the gases above a certain number of plates; and

Pig. "5 is a detailed view in vertical axial

Cut through a hole-countersink arrangement as well as by the plug "fastened in this arrangement"; and.

Pig. 6 is a perspective view of the plug,. . . ,

As shown, the apparatus of the invention comprises a plate or table 1, the side 2 of which is opposite to the disks 3 to be supported is smooth and rows of outlet and inlet openings 4 and 5 for the Oase to Production of gas cushions includes.

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The plate 1 is firmly connected to a body 7 in which chambers 8 and 9 are provided, the central Chamber 8 is in communication with a suction source via a line 10 and the lateral chambers 9 themselves are in communication stand with inlet 11. The gas flow and outlet circuit can be closed and contain a fan.

In Pig. 2 the curve 12 is shown schematically for the pressures that are obtained by means of the device over the previously laid cut. ,

As can be seen in detail in FIGS. 5 and 6, includes the Plate 1 cylindrical bores 13 'on the one hand in the chambers of the body 7 and on the other hand in the exposed or turned parts 14 of larger diameter open, which form free spaces or depressions that are open to are side 2 of the plate. In these drilled out parts of the plate are plugs 15 with two flats 16-17 stored, which face the bores 13 and 14 respectively, these flats at 18 plan over a Part which is perpendicular to these flats and which has a free interval between the plug and the wall 19 is left between the bores 13-14 of the plate.

In this way, a narrow channel is produced which is formed from two parts 20 - 21 connected via a deflection 22. It can be seen that the parts 21-22 of this line have a larger cross-section than the part 20, so that the exit velocity of the gases is reduced, which makes it possible to

30983W042 1 - io -

especially the heat exchange, at the level of the openings to the, worn band · to limit. -

The 3? Milling of the flat is on the outlet plug deeper than on the inlet plug, such that the cross section of the channel 20 is larger and the pressure losses in the Of the order of 5 times less.

The stopper can at its end adjacent to the body 7 a part 23 cut at an angle.

As can be seen in FIG. 4, a Αμ sequence can be used of plates 1 in a variable number according to the distance separating the two workplaces, with these Plates are arranged parallel to each other and transversely to the direction of displacement of the discs or the belt. The plates can be slightly inclined with respect to one another so that they pass through the disk or the belt the differences in level of given curvature 'assume. As shown the inlet and outlet openings can be like a checkerboard be arranged with respect to each other.

Of course, the invention is not limited to that described Embodiment limited; Changes and Changes are within the scope of the invention.

Thus, the device described can be used as a serve blowing G-ar pillow carrying the underside of the pane. In this pail, the outlet 10 can be released into the environment flow out.

Claims: 309834/0421 -.11-

Claims (1)

- li - MO4O3O EXPECTATIONS; 1. A method for generating gas streams for lifting disks or belts, in particular from deformable ones Materials and especially made of thermoplastic materials v / le glass, the underside of which experiences a fixed counterpressure, which is normally in the order of magnitude of the -atmospheric pressure by these disks or bands- the effect exposed to negative pressure zones related to the counter pressure are, characterized in that the Unterdruckscnen surrounds with a stabilizing belt from an overpressure related to this counter pressure. 2. Device for generating gas cushions above the top of discs or tapes, especially made of deformable materials, and especially thermoplastic Materials such as glass, for carrying these * panes or ribbons, of the type with gas inlet or outlet openings, thereby characterized in that the inlet openings, at least those of the peripheral zone, are connected to a pantry, which supplies a gas under sufficient pressure for the load-bearing surface to alternate with stabilizing overpressure zones with respect to the environment - in the vicinity of these openings and load-bearing negative pressure zones in the vicinity of these outlet zones shows. 3. Device according to claim 2, characterized in ©, that the support zones and the stabilizing zones extend in a substantially uniform manner over the entire width 30-9834 / .042 1 - 12 - _ 12 - Alternate the disc or tape. 4. Apparatus according to claim 3, characterized in that that the successive zones are in the form of continuous transverse ones, covering the entire width of the device Have ribbons. 5. Device according to one of claims 2 to 4, characterized by at least one elongated plate, the smooth one of which Underside carries rows of inlet openings, which are connected to a. Source for supply with overpressure - based on the environment - and connected with rows of outlet openings' are, the outer rows consist of inlet openings and this plate fixed to a body with chambers is connected, which are in connection on the one hand with these openings and on the other hand with these gas feeds. 6. Apparatus according to claim 5? as a result, a leveled, that the plate (s) comprise two groups of two complementary rows of openings which are arranged transversely to the direction of movement of the disks or the belt, each row of inlet ports being a row of outlet ports is equivalent to. 7. Device according to one of claims 5 or 6 * thereby characterized in that the rows of openings are straight and at right angles to the direction of movement of discs over tape are. "■ * .... ' 8. Device according to one of claims 5 to 7 _S, characterized in that the openings are arranged like a checkerboard with respect to each other. 9a device according to one of claims 5 to 8, characterized ■ 309834 / Q42 1 ' . JL, characterized in that each of the inlet and outlet openings is formed by the channel which is left free on the one hand between a bore provided in the plate with a countersink or free space opposite the surface lying against the discs or the band and on the other hand a plug of a corresponding shape, one mounted in the bore and a body in the LIMITATION S _e or the free space mounted head, wherein said plug having a longitudinal cutout portion or over its entire length. 10. The device according to claim 9, characterized in that the longitudinal cutout or section of the plug through Milling of flats on one of its sides from the top of its head to the base of its body is obtained. 11. Device according to one of claims 9 or 10, characterized in that the lowering outlet openings of a crescent shape oriented in a direction substantially parallel to the rows of openings, d. H. perpendicular for the direction of movement of discs or tape. 12. Device according to one of claims 9 or 10, characterized in that the outlet openings of the depressions or free spaces in the shape of a crescent opposite the direction of the rows of openings, d. H. compared to the direction of travel are inclined by discs or tape, the inclination being less than 30 ° and preferably less than 15 °. 13. Device according to one of claims 9 to 12, characterized in that the inlet and outlet plugs - 14 309834/0421 -u- only through the one offered by the neckline on their bodies Distinguish cross-section, which is larger for the outlet openings than for the inlet openings, the ratio these cross-sections of the order of two lies. -. _. ■ ' 309834/04 2 1