DD265392A1 - GLASS COLLECTION CELL - Google Patents

Abstract

The invention relates to a glass sampling cell, which is connected by an inlet opening with a melting furnace and filled with molten glass, with a removal opening and an outlet ring on which a large-volume suction mold is placed tightly and with a lowerable body in the molten glass body. According to the invention, the upper edge of the inlet opening lies just below the glass mirror and this has a clear height of 0.1 to 0.3 times the glass level. A sliding block is mounted vertically movably in front of the inlet opening such that its slide edge lies in the upper end position at the height of the inlet upper edge and in the lower end position below the lower edge of the inlet. The volume displaced in the lower end position corresponds at least to the suction molding volume. Below the removal opening there is a funnel-shaped supply of defined volume. The withdrawal times and intervals are shortened, the system costs are reduced. figure

Description

For this 1 page drawing

Field of application of the invention

The invention relates to a glass sampling cell, which is connected through an inlet opening with a melting furnace and filled to the cover with molten glass, with a Entnahmöffr.ung in the cover and a Auslauffing on which a moving, multi-part, large-volume suction mold tightly fitted and with a in the glass melt of the glass collection cell lowerable body to reduce the suction height at the discharge opening, the housing is heated above the cover.

Characteristic of the known state of the art One of the possibilities of metered removal of molten glass from a Schmelzaggrogat is melt on the Suction surface of the molten bath in a mold. These forms are part of a machine-powered suction blower Production of hollow glass products or on a Lafette inclined to the molten bath surface as a special suction mold

appropriate. By immersing the mold by 3 to 4 mm into the melt and evacuating it, a gob is picked up and the glass strand is removed by lifting the mold with a suitable tool (Kitaigorodski, J.J.

"Technology of the glass" VEB publishing house technology Berlin, 1957, P. 221 and 577ff.).

From DE-OS 3510924 it is known a Saugspeiser for manually «manufacturing, especially for the production of large and

heavy hollow glass products to use. The suction mold is to fill on a support arm horizontally by oine

Discharge opening: moved over the palisade into the melting furnace, rotated by 180 ° and slightly lowered into the melt. Such removal of molten glass requires special well construction, e.g. B. swivel tubs, because of de

inevitable cooling of the melt at the sampling point and a protection of the sampling device before

Thermal radiation of the furnace through internals, ι. As boots, and by a complex cooling (Trier, W. "glass machines" Springer-Verlag Berlin / Goettingen.n / Heidelberg, 1964, pp. 214 and 256ff.). Due to the large free surface required for the removal and through the removal opening, heat losses occur

and to inadmissible chemical changes of some melts as a result of evaporation of constituents of the glass.

With the device known from DE-AS 2161885 for the production of G & S, these disadvantages are avoided. From a melting furnace, the molten glass enters a covered heated forehearth, which it fills to cover. The Cover has a removal opening, on the discharge ring of the suction head is tightly seated. The one- or multi-part suction mold

is designed to be pivotable and raised and lowered.

The sealing of the gap between the outlet ring and suction mold proves in the rough operation and the prevailing Temperature as problematic. If sufficient tightness is not achieved, air quality reduces quality

the extracted glass melt, leading to the committee of the finished products.

For the removal of large gobs for manual processing is from DE-AS 2903410 a further development of such Voi direction known. In the suction mold, a glassmaker whistle is inserted with a Glasschmebelbel from above and then the Filling process by evacuation, while preserving the Glasülbels initiated. Although this allows a better hand lift heavy Glasläbelbel, but takes the filling of large suction forms, in the Relative to the processing or cycle time, relatively long time to complete. In one embodiment, the device known from DE-AS 2161885, deshaln home filling the suction mold is the Pressure difference between forehearth and suction reinforced by a lowerable in the forehearth piston is provided. The Piston moves, synchronized by controls with the removal, in a cylinder used in the forehearth. The Glass melt flows through the cylinder through an upper opening, through holes in the lowerable piston through it

and is the rapid lowering of the piston through a lower opening in the fore-space between the cylinder and

Removal opening pressed. The free space above the cylinder is heated by means of burners. With such an arrangement is zw / pure reduction of Suction height and thus a faster filling of the suction mold achieved, the necessary slow return of the piston at relative

However, large piston stroke prevents short cycle times of removal.

The design principle of such an arrangement also requires the use of more expensive, more resistant, heat-resistant Materials for the piston with shank and the cylinder and a complex processing of these parts. Object of the invention

It is the object of the invention to provide a glass extraction cell for a suction mold, by which the extraction time and the intervals (cycle times) of the gas extraction / shortened and the system costs are reduced.

Explanation of the essence of the invention

The object of the invention is to effect the reduction of the suction height at the discharge opening by a new design principle, which allows the use of relatively inexpensive refractory material for it and shortens or accelerates the path and the return of the cenkboren body.

The object is achieved by a position of the upper edge of the inlet opening just below the glass mirror and a clear height dor inlet opening, which corresponds to 0.1 to 0.3 times the glass level in the glass sampling cell. A slide block arranged in front of the inlet opening is mounted so as to be vertically movable so that in the upper end position its slide edge lies at the height of the upper edge of the inlet opening and in the lower end position it lies below the lower edge of the inlet opening. As a result, the sliding block closes the inlet opening. In the lower end position, the pusher stone advances a volume of melt which corresponds at least to the volume of the suction mold. A feed located below the removal opening opens in a funnel shape to the interior of the glass removal cell. The volume of the funnel-shaped feed is greater than the volume of melt displaced by the sherbetstone between its lower end position and the trailing edge of the inlet opening.

According to further features, the ratio of the cross-sections of the inlet opening and the removal opening is 5: 1 to 20: 1; the sliding block consists of a Feuorfestmaterial, z. B. zirconium corundum.

Ausführungsbelspiel The invention will be explained with reference to a schematic representation of the sampling cell in longitudinal section, for example. To a, usually the batch insertion opening opposite wall of the melting furnace 1 is the glass removal cell 2 as Forehearth attached. Purch an inlet opening 3 passes the refined glass melt 5 from the furnace 1 in the Glass removal cell 2. The glass mirror 4 is held at such a level that the glass removal cell 2 at least until

ze its cover 12 is filled; b jsser, however, that he is still a few inches higher than the lower edge of the cover 12 lies.

In the cover 12, a removal opening 13 is attached; Two or more removal openings 13 are conceivable. In order not to the volume of the glass sampling cell 2 in for the temperature control and thus the glass quality disadvantageous catfish

Enlarge, you will if necessary instead of several removal openings 13 advantageously several glass removal 2 on a

Arrange melting furnace 1. In addition, according to the invention, several extraction openings 13 cause the simultaneous synchronous Removal of molten glass 6. For removing molten glass 5, the movable suction mold 9, in the manner known to those skilled in the art, on the

replaceable spout 11 placed tightly. The suction mold 9 will be part of a glass processing machine or TdII a special removal device for mechanical or manual glass molding.

If the suction mold 9 is now evacuated via a corresponding hose connection, the molten glass 5 passes in more detail Way in the suction mold 9 and fills them largely. With voluminous 9-os suction molds, gobs of glass are made up to a mass for the production of special glass components

taken from 80kg and processed - takes the filling of the suction 9 too long a time. In addition, there is the

Risk that enter through a high vacuum air bubbles in the withdrawn molten glass 5 and quality-reducing Bubbles in the product. To reduce the suction stroke of the removal opening 13 is therefore a lowerable in the molten glass body 5, a Slider 6, provided in the glass sampling cell 2. This is arranged vertically movable in front of the inlet opening 3

and preferably consists of a dense, refractory material, e.g. 9. Zirconia corundum. When lowering it displaces the

Glass melt 5 in the glass sampling cell 2. The sinking and lifting of the pusher stone β is with the touchdown, evacuation

and lifting the suction mold 9 synchronized so that the filling of the suction mold 9 takes place in the shortest possible time.

To achieve a particularly favorable effect, the inlet opening 3 is arranged on the one hand so that its upper edge few Centimeters below the glass mirror 4 and on the other hand its clear height 0.1 to 0.3 times the height of the glass stand

in the Glasentnahmezelie 2 corresponds. In the upper end position of the pusher block β is the slide edge 1 β in

Height of the upper edge of the inlet opening 3, so this is completely free. Starting with his downward movement, the Slider β the inlet opening 3 already on a relatively short path, prevents a pushing back of the molten glass 6 in the Melting furnace 1 and allows the glass mirror 4 rise only in the suction mold 9 in the amount of its volume. The sliding block 6 is

so dimensioned that its immersed in the lower end position in the molten glass 5 volume at least the

Suction volume corresponds. Thus, in a short time the Schiebersteinu 6 and thus in a short time, the molten glass 5 jn pressed the suction mold 9 and

the sucking is effectively supported by the suppression therein hurrechenden, without too much restriction of the volume contained in the Glasentnahmezello 2 melt volume by a very large volume of the lowerable body.

The stroke speed of the pusher block 6 is subject to no restrictions in terms of its design principle,

whereby a rapid repeatability of the removal of gobs is given. The firMten adhesive glass melt 5 on the walls of the housing 8 of the Schiobersteins 6 above the cover 12 is heated by means of the

Gas burner 7 in the enclosure 8 avoided. To prevent the suction of air under the sampling cell cover through the outlet ring 11 when lifting the Schidberstciines c Ό the starting position, the removal opening 13 under the Auslc 'ring 11 funnel-shaped. The Volumiin this funnel-shaped feed 15 to Auslbufring 11 is greater than that of) sliding block 6 between his

lowest position and the lower edge of the inlet port 3 displaced melt volume, thereby ensuring that the aui'retenden glass mirror fluctuations only in the area of the funnel-shaped feed 15 to the discharge ring 11 are effective. Due to the pumping movement of the molten glass 5 in the feed 15, the thermal homogenization of the glass melt 5 coming from the discharge ring 11 is lost - after the glass strand between the discharge ring 11 and

Suction mold 9 is separated - significantly accelerated and improved. This stands for the subsequent glass removal process

well conditioned glass melt 5 available.

To achieve short removal cycle times, finally, the cross sections of the inlet opening 3 and the removal opening 13 are so

dimensioned so that they form a ratio of 5: 1 to 20: 1, the molten glass 5 can flow into the glass taps sufficiently quickly.

The forming when lifting the suction mold 9 from the discharge ring 11 glass strand is separated by a pair of scissors 10. In the removal cell 2, the molten glass 5 is heated by heating electrodes 14 to the temperature required for removal

held.

An adverse cooling of the molten glass 5 in the glass sampling cell 2 by Entnahrnevorgang is not given.

Claims (3)

1. Glass removal line, which is connected by an inlet opening with a melting furnace and filled to the cover with molten glass, with a removal opening in the cover and a discharge ring on which a moving, multi-part, large-volume suction mold sits tightly and with a in the molten glass of the glass collection cell Lowerable body to reduce the suction height at the discharge opening, the housing is heated above the cover, characterized by the position of the upper edge of the inlet opening (3) just below the glass mirror (4) and a clear height of the inlet opening (3) the 0.1 - Up to 0.3 times the glass level in the glass removal cell (2), by a front of the inlet opening (3) arranged sliding block (6), which is mounted vertically movable, that in the upper end position its slide edge (16) at the level of the upper edge of Inlet opening (3) and in the lower end position, this is below the lower edge of the inlet opening (3), whereby the pusher block (6) closes the inlet opening (3) and displaces in the lower end position a melt volume which corresponds at least to the volume of the suction mold (9) and through a below the removal opening (13), to the interior of the glass removal cell (2 ) opening funnel-shaped opening 15 whose volume is greater than the volume of melt displaced by the gate valve 6 between its lower end position and the lower edge of the inlet opening 3. 2. Glass sampling cell according to claim 1, characterized by a ratio of the cross sections of the inlet opening (3) and removal opening (13) of 5: 1 to 20: 1. 3. glass extraction cell according to claim 1 and 2, characterized in that the sliding block (6) made of a refractory material, e.g. Zirconia corundum exists.