DE8625545U1 - Suction feeder - Google Patents

Description

The invention relates to a suction feeder with the features of the preamble of claim 1.

Glass articles in relatively small quantities or of a particular size, i.e. those that are not suitable for automatic mass production, are made by mouth blowing. This has so far been done by the glassmaker dipping a metal pipe, the so-called pipe, into the molten glass and winding up a piece of glass. Since this method cannot be used to pick up as much glass as desired, the glassmaker blows on the piece of glass that has been picked up first, so that a bole is created. This bole solidifies and is reinserted into the molten glass, and another layer of glass is wound up. This process can be repeated. When the glass is picked up again, the bole is heated through to such an extent that it can be processed again, i.e. can be blown up further. When the glass is picked up again, the so-called over-piercing, over-piercing bubbles, impurities between the picked up layers of glass and the like arise, which is detrimental to the appearance of the article.

Picking up pieces of glass from the molten glass with the pipe requires working in close proximity to the melting tank or furnace, which exposes the glassmaker to considerable heat stress.

Furthermore, when picking up the glass gobs with the pipe, it is not possible to prevent different temperature distributions from occurring, such that a maximum amount of heat is retained somewhere in the area of the glass gob. When blowing, this warmest and therefore softest area is most likely to expand under the blowing pressure, which generally results in the gob being deformed in a different way than in the straight alignment of the pipe. The glassmaker has to compensate for these irregularities with a lot of effort, turning the pipe and the like! This work-

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The work requires a lot of skill and time, reheating and the like, and it is very difficult to achieve a uniform glass distribution or wall thickness of the hand-blown article.

Finally, in the context of the previous mouth-blowing process, a certain navel had to be provided for the production of larger vessels, i.e. a base mass of glass that does not belong to the finished vessel but is separated and melted down again.

With such a suction feeder, single-colored glass items can be produced, depending on the color of the glass in the melt. Clear glass is of course also particularly suitable here. On the other hand, two-colored glass vessels are known, for example goblets, cups, vases and similar items, which are obtained in cheap versions by applying a corresponding color coating to normal clear glass. In higher-quality versions, the blank consists of two different colored glass layers, such that the outer layer consists of colored glass and the inner layer of normal clear glass. In the course of grinding, the colored glass layer is given the desired |

Pattern corresponding sections broken through so that there |

the clear glass appears. To do this, you can make so-called colored glass jackets and then put clear glass into these heated dome-shaped parts using a glassblower's pipe.

The colored glass coating then adheres to the filled clear glass.

This is called flashed glass. After heating §

of the coloured glass jacket, the two-layer f

Glass bucket in the traditional way. I

The invention is based on the object of producing oral |

blown, especially large and heavy hollow glass \

to make the glass-cased vessels easier to handle and reduce heat loads and to achieve better quality results with less energy consumption and less waste glass in a shorter time.

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This object is achieved according to the invention by using a suction feeder with the features of claim 1 in the course of producing hand-blown hollow glasses in flashed glass design.

The suction feeder designed according to the invention for the production of particularly heavy and/or large-volume cased glass is characterized in that it can be moved back and forth between a glass receiving position in which glass is sucked from the melt into the receiving space of the suction head and a glass delivery position located far outside the melting tank or melting furnace, on the one hand in an approximately translatory displacement movement and on the other hand by a rotational movement such that the suction head is rotated by approximately 180° between these two positions. The translatory movement and the rotary movement can take place at the same time, at least in the longitudinal section of the displacement movement path outside the melting furnace. In order to suck the glass gob out of the melt, the suction head must be turned with a collar slightly immersed in the melt towards its receiving opening or the accessible front side of its receiving space facing the melt, while in the glass discharge position it is aligned with the open front side of its '' glass receiving space pointing upwards. This

the glassmaker can, standing upright, reach the surface of the sucked-in glass gob accessible through the front of the glass receiving space with his pipe, at the end of which a relatively large diameter tack iron is provided. According to the invention, a prefabricated colored glass jacket is inserted into the suction head, specifically adapted by a suction head insert, so that the glass receiving space open towards the receiving opening is correspondingly surrounded by the colored glass jacket. The colored glass jacket, which is kept heated inside the suction head, connects to the glass gob which enters the glass receiving space by applying negative pressure in such a way that the glass body thus obtained can be pressed with the help of the hot tack iron to which it adheres.

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can be removed from the suction head. The negative pressure that is applied to pick up the glass gob from the melt is maintained until the suction head is turned sufficiently far so that the glass gob cannot escape accidentally. To make it easier to lift out the flashed glass body using the pipe, the glass receiving space can be briefly pressurized via the same pressure paths below while switching off the negative pressure.

In a preferred embodiment, the suction head is firmly connected to one end of the support arm, which is fixed to a pivot bearing at the other end. The longitudinal axis of the support arm is preferably arranged radially offset from the axis of rotation of the pivot bearing.

The open front side of the receiving space of the suction head can be provided with a lid, which in turn has the receiving opening for sucking the glass gob out of the melt, whereby preferably an outwardly projecting collar is provided which dips a few millimeters into the glass melt. This lid, which is closed in the glass receiving position, is open outside the furnace in the glass discharge position so that the open front side of the glass receiving space is accessible as described above. A glass cutting knife can be integrated into the lid and can be operated from outside. This is preferably a slider which forms part of the lid. In particular, the outer part of the lid is designed as a slider, so the receiving opening reaches through the cutting knife and the actual lid so that a displacement movement of the cutting knife parallel to the lid plane takes place to separate the glass strand after the glass gob has been sucked into the glass receiving space by shearing.

Firstly, with the help of this suction feeder, the glassmaker only has to come into contact with the already prepared glass post relatively far outside the molten glass. He is therefore exposed to a lower heat

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The glass post is sucked out of the melt as a single piece of glass and thus has circular isothermal heat zones, which means that a uniformly expanding parison is created when blown. The colored glass martel forms one of these isothermal heat zones, so that the uniform expansion of the parison formed from the colored glass jackets and glass post is not affected. Due to the relatively large diameter of the iron , the amount of residual glass is also low. The working time is shortened by the better blowing conditions and the easier handling of the glass body or parison during the production of the flashed glass hollow body.

^-' barrel due to these conditions.

Due to the pivoting movement around the axis of the pivot bearing

around, which runs approximately in the longitudinal direction of the guide, receives j

one has relatively short swivel paths and thus a corresponding J

correspondingly small space requirement. Due to this short movement and |

also the possibility of superimposing translational and H

rotary movement, the work cycle time can be kept short j§

The glass remains hot enough. Just to improve j.

the surface quality, the glassmaker can remove the |

Two-layer glass body in a muffle superficially «

reheat. |

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The design of the suction head is preferably such that;

that the contact area between the suction head insert and \

the coloured glass jacket to the vacuum inlet of the suction head - I

is closed, whereby the coloured glass jacket inside the suction I

head can be held or fixed in its position. This |,

can be done via a ring suction channel that is connected to the same <' central vacuum inlet as a vacuum ring channel for the evacuation of the glass receiving space.

the vacuum ring channel is preferably in the upward direction &iacgr;

facing front surface of the suction head insert, in the ?

Neighbouring area of the suction head receiving opening |

turned edge of the colored glass jacket.

In a particularly preferred embodiment, the suction head is provided with a lid which, in its closed position, has an edge area that overlaps the edge of the colored glass casing directed towards the receiving opening, so that the colored glass casing is held in its position solely by the lid or additionally by it. The lid between the suction head insert and the ■

The vacuum ring channel arranged on the lid is then connected to the glass receiving space via the non-tight transition area between the edge area of the lid and the Räfiu ties Färiagi äsmäniei s facing it.

\ ,, It is also possible to place the camera in a position facing away from the

A vacuum opening is to be provided in the wall area of the colored glass jacket, particularly in the middle area of its base, which breaks through the colored glass jacket and is connected to the vacuum inlet. The evacuation of the glass surface can be carried out in this

Ej the heating chamber through this vacuum opening. fj

Such a procedure is preferred if no coloring or that of the glass gob to be picked up is to appear in this bottom wall area of the colored glass jacket on the finished glass article. Of course, both the vacuum ring channel and the vacuum opening can be provided. If one works with the ring gap, then r is the transition area between the edge area of the lid and

the edge of the coloured glass jacket is only closed by the absorbed glass from the melt when the receiving space surrounded by the coloured glass jacket is filled with glass absorbed from the melt,

e.g. clear glass, is completely filled. Due to this surprising phenomenon, it is possible to dispense with the vacuum opening and only work with the vacuum ring channel, so that a closed color ring is obtained around the glass gob.

In a particularly preferred design, the suction head insert is made of a highly heat-insulating material, so that the previously heated colored glass jacket maintains a temperature that enables the connection with the glass gob that is subsequently picked up. In this sense, a particularly heat-resistant

Thin layer in the area of the suction head inserts and the colored glass jackets are displayed.

The invention is explained in more detail below using the exemplary embodiment shown in the drawing.

Figure 1 is a schematic partial side view of the suction

feeder in its glass receiving positionJ

Figure 2 is a schematic partial side view of the

example in the glass dispensing position;

Figure 3 is a sectional view through an embodiment

Example of the suction head of the suction feeder according to Figure 1 and 2 ₄

The suction feeder, designated as a whole with 1, according to the exemplary embodiment is held on a device bed, designated as a whole with 2-^, on which a longitudinal displacement guide, designated as a whole with 3, is formed.* The device bed 2 can be designed in a manner not shown in detail so that the guide ;J in

&bull; twa horizontal plane pivotable and out of it; u»-.i

&bull; can be adjusted to a certain angle of inclination. This allows adjustments to be made, for example to the melting tank.

A carriage 4 is held on the guide 3 so that it can be easily moved in the longitudinal direction of the guide, for example by means of a ball guide (not shown). The carriage 4 is provided with a support frame 5 which is held on the carriage itself so that it can pivot about an inclination axis 6 running transversely to the longitudinal direction of the guide and is supported at a point radially spaced therefrom by means of a support wheel device 7 on a specific path of the guide 3, which will be explained later.

A pivot bearing 8 is attached to the support frame 5, which has a pivoting bearing on its front side pointing in the guide direction.

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arm 9, to which one end 11 of a support arm 10 is fixed on the outside, which supports a suction head 43 at its other end 12, extending in the longitudinal guide direction. The connections of the support arm 10 at one end 11 to the swivel arm 9 of the pivot bearing 8 on the one hand and that of its end 12 to the suction head 43 are each rigid. The longitudinal axis 14 of the support arm 10 runs parallel to the swivel axis 15 of the pivot bearing, offset by the radial distance t in the area of the swivel arm 9, as can be seen in the figures.

Liiiks In the picture of Figure 1 a melting furnace or melting tank is indicated, the partial side view shows the carriage in its

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M '- ^J end cover facing the furnace. The support arm 10

with its end 12 carrying the suction head 43 in the area above the glass melt in the melting furnace. The rotational position of the pivoting arm ■? of the pivot bearing 8 is - in the embodiment shown upwards - rotated in such a way that the suction head 43 is in its glass receiving position 16.

Figure 2, on the other hand, shows the displacement position of the carriage 4 in the other end region of the guide 3 facing away from the melting furnace, in which the support arm 10 with the suction head 43 is located outside the melting furnace in the glass delivery position 17, in which the suction head 43 is also pivoted by pivoting the pivot arm 9 of the pivot bearing 8 through 180°, in such a way that its glass receiving space ₅₅ with the open front side 19 is directed upwards.

The open front side 19 of the glass receiving space 55 inside the suction head 43 is assigned a cover 20 which is arranged around an outside

this front side 19 or, in the area of the side wall of the suction head 13, the axis 24 provided can be pivoted into a closed position - Figure 1 - and an open position - Figure 2. The lid 20 assumes the closed position when the suction head 43 is in the glass receiving position 16 or is transferred to it, while the lid 20 assumes its open position when the suction head 43 is in its glass delivery position 17, as shown in Figure 2.

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The lid 20 is provided with a receiving opening 21 approximately in its middle area, through which, in the glass receiving position 16 - Figure 1 - glass is sucked from the melt into the glass receiving space 55 of the suction head 43. This is done by means of a line (not shown) connected to the receiving space 55, which is connected to a vacuum source (also not shown) for this suction. A protruding collar 22 is arranged around the receiving opening 21, which dips slightly into the glass melt in the glass receiving position of the suction head 43, as shown in Figure 1. After filling the glass receiving space 55, the volume of which can be determined by various inserts that can be optionally fixed in the suction head 43, the connection between the glass gob received in the glass receiving space 55 and the glass of the melt is severed by a cutting knife 23 that is movably held on the lid 20 or forms part of this lid 20, as shown in the present embodiment. The cutting knife 23 forms the outer part of the lid and is mounted on it so that it can move parallel to the lid plane. In the glass receiving position 16 shown in Figure 1, the receiving opening 20 is opened by a corresponding opening in the cutting knife 23 being aligned with one in the rest of the lid 20. To cut the glass strand, the cutting knife in the example is moved to the left in relation to the rest of the lid in such a way that the two openings in the knife and the lid forming the receiving opening 21 move against each other until the glass strand is sheared off. For this purpose, a coupling is made between a driver 26 and an engagement opening 25 in the cutting knife 23 in the closed position of the lid 20. A pneumatic piston-cylinder device is arranged in the support arm 10, which moves the driver 26 accordingly while taking the cutting knife with it. The coupling of this actuating device to the cutting knife takes place automatically when the lid 20 is closed, while it disengages when the lid 20 is opened, as »

This can be seen in Figures 1 and 2. The crossing of the I

lid between its closed position and its open position occurs Ij

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by means of an actuating rod 27 which extends parallel to the support arm 10 and is controlled from the carriage area. It is therefore a shaft.

In order to prevent the glass melt from escaping from the melting tank, the removal opening 33 of the melting furnace is equipped with a so-called palisade stone 32, which forms a threshold that protrudes above the surface of the melt. The suction head 43 is moved over this threshold by a special design of the guide. The guide, designated as a whole with 3, has a sliding guide 29 that actually holds the carriage in a longitudinally displaceable manner and is provided with a separate track for the support wheel device 7 of the support frame 5, in that it is provided with an upwardly rising elevation 23 directed towards the melting furnace or the glass receiving part 16. If the carriage 4 reaches approximately this elevation 28, the support frame with the pivot bearing, the support arm and the suction head are slightly pivoted about the I inclination axis 6 by the support wheel device running onto the upwardly directed running surface of the elevation 28, so that the suction head 43 is raised relative to the sliding guide 29. This elevation 28 can be lowered again in the further course - to the left in Figure 2 - so that after the elevation is exceeded by the carriage or the support wheel device 7, the suction head *3 is lowered again accordingly. In addition or in addition, the end of the special track for the support wheels 7 can be formed by an end piece 30, which is pivotably mounted on its area facing away from the melting furnace or the glass receiving position 16 about an axis running transversely to the longitudinal direction of the guide, while the free area projecting forwards can be raised and lowered with the aid of a pneumatic piston-cylinder device 31. In this way, even without moving the carriage along the guide, it is possible to immerse the cover 20 or its collar 22 in the closed position according to Figure 1 in the glass melt in a targeted manner and to lift it out again after the glass gob has been sucked in.

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In a manner not shown, the parts exposed to the special heating by the glass melt in the glass receiving position 16 are water-cooled. This applies in particular to the suction head 43, but also to the support arm 10 and the actuating rod 27. The cover is sufficiently cooled by its support on the edge of the front side 19 of the receiving space .55 of the suction head 43 through appropriate contact.

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As shown in the figures, the back and forth movement of the carriage 4 can be generated by an electronically controlled motor in conjunction with a gear and a rack. This allows a very smooth movement and, above all, braking of the carriage. All other movements are generated by pneumatic devices.

The suction feeder is particularly suitable for the manual production of heavy hollow glass. It takes the molten glass out of the furnace and transports it out in portions. The use of this suction feeder allows an increase in production with a reduced number of personnel, an increase in the quality of the blown articles - over-piercing the blowpipe with all its disadvantages is eliminated - and a drastic reduction in the high thermal load on the glassmakers.

The working sequence is as follows: After a start impulse, the suction head 43 moves horizontally into the melting furnace and lowers itself when it reaches its final position - glass receiving position. As a result, the downward-facing, closed lid 20 or its collar 22 _dips a few millimeters into the glass melt. The glass receiving space 55 _is placed under negative pressure, which fills the mold in one to two seconds. The suction head is then lifted from the surface of the glass melt, the cutting knife 23 integrated in the lid 20 separates the glass strand between the sucked-in glass gob and the glass melt, and the movement outwards into the glass discharge position begins. When the outermost position is reached - for example 1 m from the melting furnace - the suction mold swivels through 180°, which also occurs during the longitudinal movement.

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The carriage can be moved and the lid 20 is opened. The glassmaker attaches the glass gob, which is accessible from above through the upwardly facing open front side 19 of the glass receiving space 55, to the tacking iron of the pipe, which is special for this purpose, and removes the glass gob, whereby the removal is made easier by a short burst of overpressure in the glass receiving space 55. After the glassmaker has briefly warmed up the surface of the glass gob in a socket, he can process it further in the conventional way to make any article of any shape. The constant weight of the glass as well as the even homogeneity and temperature distribution in the glass have a very advantageous effect here.

The sectional view of the suction head 43 according to Figure 3 shows a cup-like support part 44 which is firmly connected to one end 12 of the support arm 10 (Figures 1 and 2) in any way. A suction head insert 45 is inserted into the support part 44 and is held to the support part 44 by means of a connecting piece. The connecting piece as a whole passes through corresponding holes or openings in the base of the support part 44 and the base area of the suction head insert 45, as can be seen in more detail in the drawing. The connecting piece is provided on the outside with a blind hole-like recess which serves as a vacuum inlet 47. In the end area of the vacuum inlet, a cross hole is led through the nozzle 46, which opens into a vacuum line 48 and is connected to a small-volume ring suction channel 49 located between the nozzle 46 and the suction head insert 45. The ring suction channel 40 is connected to the contact area, which is formed between the inner wall of the suction head insert 45 and a colored glass casing 50 in that the contact between the outer surface of the colored glass casing 50 and the inner surface of the suction head insert 45 supporting it is not airtight.

The coloured glass jacket 50 is prefabricated outside the suction head 43 and is inserted in a heated state into the suction head insert 45 previously inserted into the support part 44. Due to the particularly heat-insulating material of the suction head insert 45

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a special inner surface lining of the suction head" |

Set with an asbestos layer ,56 or the like, the common I

heated colored glass jacket in the suction head accordingly. After inserting the colored glass jacket 00, the lid 20 with the collar 22 and knife 23 is brought into the closed position, which is shown in Figure 3. The suction head is thus prepared to receive a glass gob from a melt - Figures 1 and 2 -, i.e. the receiving opening 21 provided inside the collar or lid 20 is connected to the glass cover 55 surrounded by the colored glass jacket 50.

The vacuum line 48 is connected to a further vacuum line 52, which leads from the base area of the suction head insert 45 to its front side area facing the receiving opening 21 and there opens into a vacuum channel 53, which is open towards the cover 20 and is incorporated into the front cover contact surface of the suction head insert, in such a way that the edge 58 of the colored glass jacket 50 facing the cover 20 is encompassed on the outside.

In the design of the suction head 43 prepared for receiving the glass gob from the melt, as shown in Figure 3, an edge region 57 of the closed cover 20 overlaps the edge 58 of the colored glass casing 50 facing it in such a way that - even if only due to unevenness - a correspondingly small gap is formed between the edge 58 and the edge region 57.

A gap 54 remains through which the vacuum ring channel 53 |

with the receiving space 55 surrounded by the coloured glass jacket 50

si is connected. §

In the wall area or bottom area 59 of the coloured glass casing 50 opposite the receiving opening 21, a vacuum opening 60 is introduced which breaks through the casing 50 and

thus the receiving space 55 with the attachment area 51 between the ,

Outer surface of the coloured glass jacket 50 and the inner surface or

Asbestos layer 56 of the suction head insert 45. j

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For picking up or sucking in a glass post through the receiving opening 21, the vacuum chamber 47 is connected via a line (not shown) to a pressure source (also not shown), so that the receiving chamber 55 is evacuated via the vacuum lines AB and 52 and the vacuum ring channel, because the gap 54 exists between the edge 58 of the colored glass jacket 50 and the edge area 57 of the lid 20. If one ensures that the colored glass jacket 50 remains in this position after being inserted into the suction head insert 45, which can be done by rifling or , as here, by closing the lid 20.

can happen, the above-described negative pressure application to the receiving space 55 via the gap 54 and the ring-U channel 53 is completely sufficient to pick up a glass gob from the melt, which completely fills the receiving space 55. This is possible because the gap 54 is only closed by the picked up glass gob when the entire receiving space 55 is filled.

i On the other hand, instead of the Fting channel, it is better to use |

additionally in the floor wall area the described vacuum opening |

60, which can be dimensioned differently within wide limits. In this case, the contact area 5t between the coloured glass jacket 50 and the suction head insert 45 is placed under negative pressure via the ring suction channel 49, which extends into the area of the un- jj

pressure opening and thus evacuates the receiving space 55 ||

ated. Of course, it is also possible to evacuate only the contact area 51 and thus hold the colored glass jacket 50 on the suction head insert or additionally fix it in its position and thus ensure that in any case the gap 45 between the edge 58 of the jacket 50 and the edge area 57 of the cover 20 is correspondingly |

cherid is wide open.

Claims (1)

PROTECTION CLAIMS 1. Suction feeder with a suction head, the glass receiving space of which can be connected to a vacuum source and which is located on a support arm which can be moved back and forth by means of a slide along a guide between a glass receiving position, in which the suction head is to be arranged with the receiving opening pointing downwards above a glass melt in a melting furnace or the like, and a glass delivery position, which is to be provided outside the melting furnace, characterized in that the suction head (43) is mounted so as to be pivotable - preferably by about 180° - about a pivot axis (15) running approximately parallel to the longitudinal direction of the guide (3) between the glass receiving position (16) with the receiving opening (21) pointing downwards and a glass delivery position (17) with a glass receiving space (18) accessible from above for a blowpipe or the like, and that the suction head (43) has a suction head insert (45) into which a coloured glass jacket (50) is accommodated, which surrounds the glass receiving space (55) and leaves it open towards the receiving opening (21). 2. Suction feeder according to claim 1, characterized in that the support arm (10) rigidly holding the suction head (43) at its end (12) is fastened at its other end (11) to a pivot bearing (8, 9) which is arranged on the carriage (4). l (M ItII III ti * * · 3. Suction feeder according to claim 1 or 2, characterized in that the suction head (43·) and/or the support arm (10) are held radially offset to the pivot axis (15) and rotatable about this. 4. Suction feeder according to one of claims 1 to 3, characterized in that the support arm (10) is arranged to extend parallel to the pivot axis (15). 5. Suction feeder according to one of claims 1 to 4, characterized in that the suction head (43) is provided with a cover (20) in which the receiving opening (21) is provided, which in the glass receiving position (16) is in a closed position covering the glass receiving space (55) of the suction head (43) up to the receiving opening (21) and which in the glass delivery position (17) is open so as to expose the front side (19) of the glass receiving space (55) pointing approximately upwards. 6. Suction feeder according to claim 5, characterized in that the cover (20) is mounted so as to be pivotable about an axis (24) arranged outside the front side (19) of the glass receiving space (55). 7. Suction feeder according to claim 5 or 6, characterized in that the cover (20) is movable between its closed position and its open position by means of an actuating rod (27) extending approximately parallel to the support arm (10). 8. Suction feeder according to one of claims 5 to 7, characterized in that the cover (20) has on its outside a collar (22) surrounding the receiving opening (21) for entry into the glass melt. 9. Suction feeder according to one of claims 5 to ₁ , characterized in that the cover (20) has a cutting knife (23/. 10. Suction feeder according to claim 9, characterized in that the cutting knife (23) is held on the lid (20) so as to be displaceable parallel to the lid plane. 11. Suction feeder according to claim 9 or 10, characterized in that the receiving opening (21) /" \ Cover (20) and the cutting blade (23) in the suction position are designed to penetrate through. 12. Suction feeder according to claim tt, characterized in that the cutting knife (23) at least partially forms the outside of the cover (20) and has the collar (22). 13< Suction feeder according to one of claims 1 to 12, characterized in that inserts with glass receiving spaces of different volumes can be optionally fixed in the suction head (A3). &zgr; IA. Suction feeder according to one of claims 1 to 13, characterized characterized in that the guide (3) for the slide (A) has a hill-shaped elevation (28) directed upwards in its end region facing the glass receiving position (16) of the suction head (A3). 15. Suction feeder according to one of claims 1 to 1A, characterized in that at least one end piece (30) of the guide (3) - in particular by means of a pneumatic piston-cylinder device (31) - is designed to be raised and lowered. &bull; > It &bull; i t Il Hi . * ti 16. Suction feeder according to one of claims 1 to 15, characterized in that the negative pressure connection line of the glass receiving space (55) of the suction head (43) in the glass delivery position (17) is designed to be connectable to a source of excess pressure by means of a changeover valve. 17. Suction feeder according to one of claims 1 to 16, characterized in that the drive of the carriage (4) along the guide (3) and that for the pivoting movement of the suction head (43) or the support arm (10) are designed to be coupled in a superimposed manner over at least part of the carriage movement path. 18. Suction feeder according to one of claims 1 to 17, characterized in that the cutting knife (23) in the closed position of the cover (20) can be actuated via a driver (26) by a pneumatic cylinder piston - arranged in particular in the support arm (10). 19. Suction feeder according to one of claims 1 to 18, characterized in that at least the suction head (43) _, the support arm (10) and/or the actuating rod (27) is or are provided with a circulation guide for a cooling liquid. 20. Suction feeder according to one of claims 1 to 19, characterized in that the contact area (51) between the suction head insert (45) and the colored glass jacket (50) is connected to the vacuum inlet (47) of the suction head (43). II« I« ■> 4 < · ' ' . . . I i · . » 1.4·« ti J 21« Suction feeder according to claim 20, characterized in that the contact area (51) between the suction head insert (45) and the colored glass jacket (50) is connected to the vacuum inlet (47) of the suction head (43) via a suction channel (49)« 22« Suction feeder according to one of claims 1 to 21, characterized in that the closed cover (20) with an edge region (57) overlaps the edge (58) of the coloured glass casing (50) directed towards the receiving opening (21)« 23» Suction feeder according to one of claims 1 to 22, characterized in that in the transition region between the closed cover (20) and the suction head insert (45) a vacuum ring channel (53) is provided, which is connected to the vacuum inlet (47) of the suction head (43), 24. Suction feeder according to claim 23, characterized in that the negative pressure ring channel (53) is formed in the end face of the suction head insert (45) directed towards the receiving opening (21). 25. Suction feeder according to one of claims 1 to 24, characterized in that the colored glass jacket (50) - in particular in its wall region (59) opposite the receiving opening (21) - is provided with a vacuum opening (60). 25i Suction feeder according to one of claims 1 to 25, characterized in that the suction head insert (45) consists of a heat-insulating material. 27. Suction feeder according to claim 25, characterized in that the suction head insert (45) in its the area adjacent to the coloured glass jacket (£>Ö) is provided with a highly heat-resistant layer (56), for example made of asbestos.