阅读说明：本技术 玻璃分配通道的料道槽组件 (Channel trough assembly for glass distribution channel ) 是由 P·富尼尔 于 2020-04-08 设计创作，主要内容包括：一种玻璃分配通道的料道槽组件,所述组件包括单个衬里(50)、两个或更多个柱塞(12-(1)；12-(2))、和包括第一孔(28-(1))和第二孔(28-(2))的单个流动垫圈(14),所述柱塞至少部分地布置在所述衬里中,多于三个凹槽(52)设置在所述衬里的内表面(26i)上并且每个凹槽包括在所述衬里的下部(50i)中的下部(52i),所述衬里的所述下部用于与熔融玻璃接触,所述凹槽的所述下部(52i)在所述衬里的下部的长度的大于10％上延伸,并且所述凹槽的所述下部沿所述凹槽测量的长度大于所述衬里的下部的长度的0.1倍,所述下部(50i)的长度是沿所述衬里的轴线(X)测量的。(A gob trough assembly for a glass dispensing channel, said assembly comprising a single liner (50), two or more plungers (12) 1 ；12 2 ) And comprises a first hole (28) 1 ) And a second aperture (28) 2 ) The plunger is at least partially disposed in the liner, more than three grooves (52) are provided on an inner surface (26i) of the liner and each groove comprises a lower portion (52i) in a lower portion (50i) of the liner for contact with molten glass, the lower portion (52i) of the groove is a length of the lower portion of the linerAnd the length of the lower portion of the groove measured along the groove is greater than 0.1 times the length of the lower portion of the liner, the length of the lower portion (50i) being measured along the axis (X) of the liner.)

1. A gob trough assembly for a glass dispensing channel, said assembly comprising a single liner (50), at least two plungers (12)₁；12₂) And comprises a first hole (28)₁) And a second aperture (28)₂) The plunger is at least partially disposed in the liner, more than three grooves (52) are provided on an inner surface (26i) of the liner and each groove comprises a lower portion (52i) in a lower portion (50i) of the liner, the lower portion (50i) of the liner is for contact with molten glass, the lower portions (52i) of the grooves extend over more than 10% of a length of the lower portion of the liner, and the length of the lower portions (52i) of the grooves measured along the grooves is greater than 0.1 times the length of the lower portion of the liner, the length of the lower portions (50i) being measured along an axis (X) of the liner.

2. A material channel assembly according to the preceding claim, wherein the number of grooves on the inner surface (26i) is less than or equal to 0.057D +4.05 and greater than or equal to 0.048D-2.43, D being the diameter in mm of the upper opening (58) of the liner.

3. A spout assembly according to any preceding claim wherein the lower portion of a groove (52), preferably the lower portion of any groove, extends over more than 90% of the length of the lower portion (50i) of the liner.

4. A channel trough assembly according to any preceding claim, wherein a groove (52), preferably any groove, is the length L of the liner₅₀Greater than 2% extension.

5. A chute assembly as claimed in any preceding claim wherein a groove (52), preferably any groove, is in the length L of the liner₅₀Is greater than 95% extended.

6. A channel trough assembly according to any preceding claim, wherein the direction of a groove (52) at any point of said groove forms an angle (θ) with the axis (X) of the liner of less than 30 °.

7. A channel trough assembly according to any one of the preceding claims, wherein the number of grooves (52) is greater than 8.

8. A chute assembly as claimed in any preceding claim wherein, at least in the lower portion of the liner,

-the minimum depth of each groove (52) is greater than 2mm and less than 10mm, the difference between the maximum depth and the minimum depth of any groove (52) is less than 4mm, and/or

-the average width of any grooves (52) is greater than 10mm and less than 30mmm, preferably less than 25mm, and/or

-depth of the groove (52)Ratio of degree to width (h)₅₂/l₅₂) Less than 0.5, and/or

-the ratio of the total surface area of the openings (54) of the grooves to the surface area of the inner surface (26i) is greater than 20% and less than 70%.

9. A grooved liner shaped for a channel and trough assembly as claimed in any one of the preceding claims.

10. The grooved liner of the immediately preceding claim having an inner diameter (D) greater than 12 cm.

11. A furnace for producing hollow glass articles, the furnace comprising the chute assembly of any one of claims 1 to 8.

12. A method for manufacturing a liner for a channel trough assembly according to any one of claims 1 to 8, in which method, in order to extend the service life of the liner, more than three grooves are provided on the inner surface of the liner, each groove comprising a lower portion in a lower portion of the liner for contact with molten glass, the lower portions of the grooves extending over more than 10% of the length of the lower portion of the liner, and the length of the lower portions of the grooves measured along the grooves being more than 0.1 times the length of the lower portion of the liner, the length of the lower portion of the liner being measured along the axis (X) of the liner.

Technical Field

The present invention relates to a gob trough assembly for a glass dispensing channel for forming gobs of molten glass.

Background

In the production of glass articles (e.g. bottles, beakers, bottles), commonly referred to as insulating glass, a suitable composition is melted in a furnace to obtain molten glass. Molten glass is delivered from the melter through a distribution channel ("feeder") to a forming machine, which will form the article.

The dispensing channel terminates in a chute assembly ("spout assembly" or "glass dispensing channel end"). As schematically shown in FIG. 1, a chute assembly 10 generally comprises:

a channel 11 ("spout");

a flow gasket 14 ("grommet");

a plunger 12 that moves up and down to hold or repel molten glass through a flow gasket 14 to form a gob,

the lining 16, which is usually rotated and whose height position can be controlled, in particular in order to prevent the molten glass from reaching the flow gasket, so that it can be replaced.

Gobs formed using the chute assemblies are typically dispensed to a forming machine using slides.

Fig. 2 schematically shows two examples of a conventional liner in a longitudinal cross-sectional view. The liner 16 having an axis x for the right image generally comprises:

a cylindrical sleeve 18, the axis X of which is generally vertical, which has a circular cross section and the orifice 19 of which is open at its upper and lower ends by an upper opening 20s and a lower opening 20i, respectively, and

a transverse edge 24 at the upper end of the sleeve.

The sleeve 18 is bounded externally by a radially outer surface 26e and internally by a radially inner surface 26 i.

The lower end of the sleeve may be inclined as in the liner 16 'of the embodiment of the left image of fig. 2, the liner 16' generally being referred to as a liner for the so-called "metering system" technique.

The bore 19 of the sleeve enables the plunger 12 (such as the plunger shown in figure 3) to slide vertically. Having an axis Y₁The plunger of (a) may have a body in the form of a cylinder, which is typically formed by a rotating or conical manner. The lower end of the plunger may in particular be in the form of a hemisphere or flat.

FIG. 4 shows two holes 28₁And 28₂Is shown in schematic cross-section of the flow gasket 14.

The liner is a critical element. In particular, breakage of the liner involves a lengthy downtime to repair the production line.

One permanent requirement is to extend the time period between liner changes.

It is an object of the present invention to at least partly meet this need.

EP 1599424 (or US 2006/0213226) describes a channel trough assembly for a glass dispensing channel. Two plungers are disposed in the liner. The inner surface of the liner does not include protrusions.

FR 625493 and NL 6505096 each describe a chute assembly comprising only a single plunger and only a single outlet orifice.

Disclosure of Invention

Statement of the invention

Accordingly, the present invention relates to a channel trough assembly for a glass dispensing channel, the assembly comprising a single liner, referred to as a "slotted liner", at least two plungers, which are at least partially arranged in the liner, more than three grooves being provided on an inner surface of the liner and each groove comprising a lower part in a lower part of the liner for contact with molten glass, the lower part of the groove extending to more than 10% of the length of the lower part of the liner, and the length of the lower part of the groove measured along the groove being more than 0.1 times and preferably less than 2 times the length of the lower part of the liner measured along the axis (X) of the liner, and a single flow gasket.

This is because the inventors have discovered, entirely accidentally, that such grooves unexpectedly enable the useful life of the liner to be extended, and therefore the period of time before the liner is replaced.

The invention also relates to a grooved liner formed for a chute assembly according to the invention. In one embodiment, the inner diameter D of the liner is greater than 12 cm.

In a chute assembly according to the invention or independent of such an assembly, the slotted liner may further comprise one or more of the following optional features:

the lower portion of the liner extends over more than 15%, preferably more than 20%, preferably more than 25%, and/or less than 70%, preferably less than 65%, preferably less than 60% of the length of the liner;

the lower part of the grooves, preferably of any groove, extends over more than 20%, preferably more than 30%, preferably more than 40%, preferably more than 50%, preferably more than 70%, preferably more than 80%, preferably more than 90%, preferably substantially 100% of the length of the lower part of the liner;

the length of the groove, preferably the lower part of any groove, measured along the groove, is less than 2 times, preferably less than 1.8 times, preferably less than 1.6 times, preferably less than 1.4 times, and/or is greater than 0.1 times, preferably greater than 0.2 times, preferably greater than 0.3 times, preferably greater than 0.4 times, preferably greater than 0.5 times, preferably greater than 0.7 times, preferably greater than 0.8 times, preferably greater than 0.9 times, preferably greater than 1.0 times, or greater than 1.1 times the length of the lower part of the liner;

the grooves, preferably any grooves, extend over more than 2%, preferably more than 4%, preferably more than 6%, preferably more than 8%, preferably more than 10%, preferably more than 15%, preferably more than 20%, preferably more than 25%, preferably more than 30%, preferably more than 35%, preferably more than 40%, preferably more than 45%, preferably more than 50%, preferably more than 55%, preferably more than 60%, preferably more than 65%, preferably more than 70%, preferably more than 75%, preferably more than 80%, preferably more than 85%, preferably more than 90%, preferably more than 95%, preferably substantially 100% of the length of the liner;

the length of the grooves, preferably any groove, measured along the groove is less than 2 times, preferably less than 1.8 times, preferably less than 1.6 times, preferably less than 1.4 times, and/or preferably more than 0.02 times, preferably more than 0.04 times, preferably more than 0.06 times, preferably more than 0.08 times, preferably more than 0.1 times, preferably more than 0.15 times, preferably more than 0.2 times, preferably more than 0.25 times, preferably more than 0.3 times, preferably more than 0.35 times, preferably more than 0.4 times, preferably more than 0.45 times, preferably more than 0.5 times, preferably more than 0.55 times, preferably more than 0.6 times, preferably more than 0.65 times, preferably more than 0.7 times, preferably more than 0.75 times, preferably more than 0.8 times, preferably more than 0.85 times, preferably more than 0.9 times, preferably more than 0.95 times, preferably more than 1 times the length of the liner;

-the number of grooves on the inner surface is less than or equal to (0.057 × D +4.05) and greater than or equal to (0.048 × D-2.43), D being the diameter of the upper opening of the lining in mm;

the number of grooves is preferably greater than or equal to 8, or greater than 10, or greater than 12, or greater than 15;

-the minimum depth of each groove is greater than 2mm, preferably greater than 3mm, preferably greater than 4mm, and/or less than 10mm, preferably less than 9mm, preferably less than 8mm, preferably less than 7mm, at least in the lower part of the liner, preferably over the entire length of the groove;

-the difference between the maximum depth and the minimum depth of any groove is less than 4mm, preferably less than 3mm, preferably less than 1mm, at least in the lower part of the liner, preferably over the entire length of the groove;

-the depth of each groove is constant at least in the lower part of the liner, preferably over the entire length of the groove;

the maximum width of the grooves, preferably of any grooves, is greater than 10mm, preferably greater than 15mm, and/or less than 30mmm, preferably less than 25mm, at least in the lower part of the liner, preferably over the entire length of the grooves;

-the average width of the grooves, preferably of any grooves, is greater than 10mm, preferably greater than 15mm, and/or less than 30mmm, preferably less than 25mm, at least in the lower part of the liner, preferably over the entire length of the grooves;

-the difference between the smallest and largest width of the groove, preferably any groove, is less than 5mm, preferably less than 4mm, preferably less than 2mm, at least in the lower part of the liner, preferably over the entire length of the groove;

preferably, all the grooves have substantially the same width, at least in the lower part of the liner, preferably over the entire length of the grooves;

all the grooves have the same shape;

the grooves extend substantially parallel to each other;

in an embodiment, at least in a lower portion of the liner, preferably over the entire length of the grooves, the direction of the grooves at any point of the grooves forms an angle θ with the axis of the liner of less than 10 °, less than 5 °, preferably less than 2 °;

in an embodiment, at least in a lower portion of the liner, preferably over the entire length of the grooves, the direction of the grooves at any point of the grooves forms an angle θ with the axis of the liner of more than 5 °, preferably more than 6 °, preferably more than 7 ° and/or less than 30 °, preferably less than 28 °, preferably less than 26 °, preferably less than 25 °;

the liner comprises a collar at the upper end and/or has a conical profile at the lower end;

-the lining has a sintered or molten material, preferably a sintered material;

the inner surface of the liner has a substantially cylindrical shape (that is to say, irrespective of the grooves), preferably with a circular cross-section;

the liner can be moved in translation, preferably in vertical translation;

the lining is made of a ceramic material.

The chute assembly according to the invention may further comprise one or more of the following optional features:

-the number of plungers is greater than or equal to 3 and/or less than or equal to 4;

in an embodiment, the number of plungers is equal to 2;

the number of holes of the flow gasket is equal to the number of plungers. In this embodiment, the lower end of each plunger faces the bore of the respective flow gasket;

in an embodiment, the chute assembly comprises a first plunger and a second plunger, and the lower ends of the first plunger and the second plunger face the first hole and the second hole of the flow washer, respectively, preferably the first plunger and the second plunger are arranged coaxially with respect to the first hole and the second hole of the flow washer, respectively.

The invention also relates to a furnace for producing hollow glass articles, in particular hollow glass articles made of soda-lime, borosilicate, fluorite or crystal glass, comprising a grooved liner according to the invention and/or a channel groove assembly according to the invention.

In the spout assembly according to the present invention, the level of molten glass defines the boundary between the lower and upper portions of the liner, and thus the boundary between the lower and upper portions of each trough.

The glass articles produced may be, in particular, bottles, glasses, jars and, more generally, any container capable of containing a liquid, a cream or a paste.

The invention also relates to a method for producing a lining of a channel trough assembly according to the invention, in which method, in order to prolong the service life of the lining, more than three grooves are provided on the inner surface of the lining, each groove comprising a lower part in a lower part of the lining, which lower part is intended to be in contact with molten glass, which lower part of the groove extends over more than 10% of the length of the lower part of the lining, and the length of the lower part of the groove, measured along the groove, is more than 0.1 times and preferably less than 2 times the length of the lower part of the lining, which lower part is measured along the axis (X) of the lining.

Definition of

Unless otherwise stated, the length of a groove is its length measured along the curve of the groove.

The length of the liner is measured along its axis X between its lower and upper ends. The same applies to the lower part of the lining.

When the length of the groove, measured along axis X, is greater than X% of the length of the liner, the groove "extends" over X% of the length of the liner.

The angle between two directions is the angle between two planes perpendicular to the two directions, respectively.

The plunger is "disposed in the liner" when it cooperates with the liner to form a gob during operation.

In this specification, the adjectives "lower", "upper", "horizontal", "vertical", etc., are defined with respect to the operative position, as shown in the figure, where V is the vertical direction.

Unless otherwise specified, "including," "comprising," or "having" must be interpreted in an extensive, non-limiting manner.

Drawings

Other features and advantages of the present invention will be understood upon reading the following detailed description and upon examination of the accompanying drawings, in which:

fig. 1 (described in the background) schematically shows a conventional chute assembly in an assembled state in a left image and in an exploded view in a right image;

- [ fig. 2] fig. 2 is a schematic longitudinal cross-sectional view of two examples of conventional liners;

-figure 3 is a schematic front view of an example of a plunger with a rounded end;

-figure 4 is a schematic longitudinal cross-section of an example of a flow gasket with two holes;

fig. 5 is a schematic longitudinal section of an example of a chute assembly according to the invention in an operating position, the lower right image being a schematic section of two grooves in a preferred embodiment;

fig. 6 is a schematic front view (bottom left image) of a longitudinal cross-section (bottom right image) and a bottom view (top left image) of a slotted liner of the chute assembly of fig. 5. The top right image is a schematic cross section of two grooves.

The same reference numerals are used to designate the same or similar components.

Detailed Description

Liner pad

Fig. 1 to 4 have already been described in the preamble, reference may be made to fig. 5.

The figure shows a chute assembly 10 comprising:

a chute 11;

a flow gasket 14 comprising a first hole 28₁And a second hole 28₂；

First plunger 12₁And a second plunger 12₂Each having a vertical axis Y₁And Y₂And respectively have first lower ends 13₁And a second lower end 13₂First lower end 13₁And a second lower end 13₂Respectively facing the first holes 28₁And a second hole 28₂；

A grooved liner 50 according to the invention in a preferred embodiment.

The liner 50 generally comprises:

a cylindrical sleeve 18, the axis X of which is generally vertical, and the cylindrical sleeve 18 preferably has a circular cross section, and the orifice 19 of which is open at its upper and lower ends through an upper opening 20s and a lower opening 20i, respectively, and

a transverse edge 24 or "collar" at the upper end of the sleeve.

The sleeve 18 is defined externally by a radially outer surface or "outer surface" 26e and internally by a radially inner surface or "inner surface" 26 i. The lower end of the sleeve may be chamfered.

During operation, only that portion of the liner 50 referred to as the "lower portion" 50i is in contact with the molten glass. The upper portion 50s of the liner is not in contact with the molten glass. The level N of molten glass, shown in dashed lines in FIG. 5, is defined by the nominal conditions of use of the pre-defined channel trough assembly. Thus, the boundary between the lower and upper portions of the liner will be clear to those skilled in the art. This depends in particular on the channel slot model and in particular on the height of the channel slot model. Under nominal use conditions, the molten glass level is typically 2.5cm to 4cm below the top surface 60 of the channel trough and the lower edge 53i of the liner is typically 1.5cm to 2.5cm above the bottom 62 of the channel trough.

The lower portion of the liner generally extends over more than 15%, preferably more than 20%, preferably more than 25%, and less than 70%, preferably less than 65%, preferably less than 60% of the length of the liner.

The sleeve 18 preferably has a thickness e greater than 18mm and less than 40mm, preferably less than 35mm, preferably less than 27mm₁₈。

According to the present invention, the inner surface 26i includes a plurality of grooves 52.

The flutes 52, preferably any flutes 52, are in the form of a regular spiral. A tangent at any point of the spiral forms a constant angle theta with a vertical line extending through that point. The angle θ is preferably greater than 5 °, preferably greater than 6 °, preferably greater than 7 °, and/or less than 30 °, preferably less than 28 °, preferably less than 26 °, preferably less than 25 °. In the figure, θ is 9 °.

Preferably, the groove 52, preferably any groove 52, extends less than 0.8 turns, preferably less than 0.5 turns, preferably less than 0.4 turns, about the axis X.

The length L of the groove 52, preferably any groove 52, as measured along the axis X of the liner₅₀More than 2%, preferably more than 4%, preferably more than 6%, preferably more than 8%, preferably more than 10%, preferably more than 15%, preferably more than 20%, preferably more than 25%, preferably more than 30%, preferably more than 35%, preferably more than 40%, preferably more than 45%, preferably more than 50%, preferably more than 55%, preferably more than 60%, preferably more than 65%, preferably more than 70%, preferably more than 75%, preferably more than 80%, preferably more than 85%, preferably more than 90%, preferably more than 95%, preferably substantially 100% (as shown in fig. 5).

Each groove 52 includes a lower portion 52i in a lower portion of the liner for contact with molten glass during operation, and each groove 52 may include a complementary upper portion 52s in an upper portion of the liner with the lower portion extending toward the upper side of the liner 50.

Preferably, the depth or "height" h of the lower portion of the groove 52, preferably any groove 52₅₂Is constant. Preferably, it is greater than 2mm, preferably greater than 3mm, preferably greater than 4mm, and/or less than 10mm, preferably less than 9mm, preferably less than 8mm, preferably less than 7 mm. Preference is given toGround, the width l of the groove 52 measured at its opening₅₂Preferably constant and greater than 10mm, preferably greater than 15mm, and/or less than 30mm, preferably less than 25 mm.

Preferably, the lower portion of the groove 52 is shallow relative to its width. Preferably, the ratio h of the lower portion of the groove 52, preferably any groove 52₅₂/l₅₂Less than 0.5, preferably less than 0.4, preferably less than 0.3, and/or greater than 0.1, preferably greater than 0.2.

The lateral profile of the lower portion of the groove 52, preferably any groove 52, that is, in a cross-sectional plane perpendicular to its axis (as viewed in the bottom right image of fig. 5) is preferably symmetrical. Preferably, the profile converges from the opening 54 of the groove to its bottom 56. The absence of undercuts advantageously facilitates demolding of the liner during production. Preferably, the profile has no edges or corners. Preferably, the minimum radius of curvature is greater than 3mm, preferably greater than 4 mm.

The width and/or depth and/or profile of the groove, preferably the upper portion 52s of any groove (when such an upper portion 52s is present), is preferably the same as the width and/or depth and/or profile of the lower portion 52i from which it extends.

Preferably, the grooves 52, preferably any grooves 52, open at the lower edge 53i of the liner 50, and more preferably at the upper edge 53s of the liner 50. Thus facilitating the production of the liner.

The density of the grooves is preferably high. Preferably, the ratio of the total surface area of the groove openings to the surface area of the inner surface 26i is greater than 20%, preferably greater than 30%, or greater than 35%, and/or less than 70%, preferably less than 60%, preferably less than 50%, or less than 40%.

The number of grooves on the inner surface is preferably less than or equal to (0.057 by D +4.05) and/or greater than or equal to (0.048 by D-2.43), D being the diameter of the upper opening 58 of the liner in mm.

For example, a liner having a diameter D equal to 254mm preferably comprises at least 0.048 × 254-2.43 ═ 9.762 grooves, or at least 10 grooves, preferably less than 0.057 × 254+4.05 ═ 18.528 grooves, or 18 or less grooves.

The number of grooves 52 is preferably greater than or equal to 8, or greater than 10, or greater than 12, or greater than 15, and/or less than 30, preferably less than 25.

Preferably, the grooves 52 are regularly distributed on the inner surface 26 i.

The depth and/or width and/or length of a groove may be the same as or different from the depth and/or width and/or length of other grooves.

Preferably, all of the grooves 52 are identical.

Preferably, all of the grooves 52 extend parallel to each other.

The grooved liner can be produced using conventional techniques.

The lining is preferably made of a ceramic material, optionally at least partially covered with a coating, preferably a platinum coating.

The lining preferably comprises more than 95%, preferably more than 98%, preferably more than 99%, preferably substantially 100% oxide by mass of the lining.

The lining preferably has a composition such that Al is present in mass percent on the basis of the oxides₂O₃+ZrO₂+SiO₂The total content of + CaO is greater than 90%, preferably greater than 95%, preferably greater than 98%, preferably greater than 99%.

In a specific first embodiment, the Al of the lining is present in mass percent on the basis of the oxides₂O₃+SiO₂The total content of + CaO is greater than 90%, preferably greater than 95%, preferably greater than 98%, preferably greater than 99%. In the first embodiment, Al is present in mass percent based on the oxide₂O₃Preferably greater than 80%, preferably greater than 85%, preferably greater than 90%.

In a specific second embodiment, the Al of the lining is present in mass percent on the basis of the oxides₂O₃+ZrO₂+SiO₂The total content of + CaO is greater than 90%, preferably greater than 95%, preferably greater than 98%, preferably greater than 99%. The lining may in particular have the following composition, based on the mass of the oxides and for a total of 100%:

-Al₂O₃<85%, or Al₂O₃<80%, and preferably Al₂O₃>45% or Al₂O₃>50% or Al₂O₃>60％，

-SiO₂<25% or SiO₂<20%, and preferably SiO₂>5%, or SiO₂>10％，

-ZrO₂<45% or ZrO₂<35% or ZrO₂<30% or ZrO₂<25% or ZrO₂<21% or ZrO₂<17% or ZrO₂<13%, and preferably ZrO₂>8%, or ZrO₂>10％，

-CaO < 5%, preferably CaO < 4%, preferably CaO < 3%, preferably CaO < 2%, and

other oxides < 5%, preferably < 3%.

The liner is preferably formed by casting from a material that can be moulded in a mould.

The moldable material may be a molten liquid, the cooling of which results in a liner made of the molten material.

Alternatively, the material that can be moulded can be a slurry or concrete, the hardening of which can be caused by the action of a mould, for example of gypsum and/or a compound that causes setting, in order to obtain the original lining. Preferably, the original liner is sintered prior to use. The original liner may also be sintered in situ during its use.

Preferably, the recess is provided by the shape of the mould. Alternatively, they may be processed in the part obtained after moulding or hardening.

During operation, in one embodiment, the grooved liner rotates about its axis X.

Examples

The following non-limiting examples are given to illustrate the invention.

Production chute assemblies, each assembly comprising a chute according to reference 503-:

for the chute assembly of comparative example 1, a liner according to reference number 503 and 5741,

for the chute assembly according to example 2 of the invention, a liner according to reference number 503 and 5741 is provided on the inner surface of which 14 identical grooves are provided, the grooves having a width equal to 20mm, a depth equal to 5mm, being inclined by an angle θ equal to 9 ° with respect to the axis X and extending over the entire length of the liner, the profile of the grooves having a minimum radius of curvature of 5 mm.

These reference numbers are defined in the product catalog of the consumable SEFPRO available at the following addresses:https:// www.sefpro.com/products/expendables。

figure 6 shows a plan view of the last grooved liner.

In each channel groove assembly, the channel groove, the plunger, the flow washer and the liner are made of a material containing 75.5% Al₂O₃12.5% SiO₂And 10.5% of ZrO₂Is made of the sintered material of (1).

In each channel trough assembly, the length of the lower portion of the liner is equal to 225 mm.

The chute assembly was used under the following conditions:

the liner is rotated at a speed equal to 2.5rpm,

the average temperature of the glass when entering the channel assembly is equal to 1160 c,

-the glass is a soda-lime glass,

the amount of glass passing through the flow gasket is equal to 115T/j.

Table 1 below summarizes the results obtained.

[ Table 1]

	Comparative example 1	Example 2 according to the invention
			Service life of the lining	7 months old	14 months old

These tests have shown that providing grooves on the inner surface of the liner can double the service life of the liner. The service life is changed from 7 months to 14 months.

The time period between two liner changes can be extended.

It can clearly be seen that the present invention thus provides a solution that significantly limits the frequency of liner changes.

Of course, the invention is not limited to the embodiments described and depicted and these embodiments are provided purely for illustrative purposes.

In particular, the liner may be configured to accommodate more than two plungers. It may comprise a projection variant, in particular a groove and/or one or more radial holes on its outer surface.