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WO1992011215A1 - Appareil de formation de paraisons comprenant un cylindre refractaire - Google Patents

Appareil de formation de paraisons comprenant un cylindre refractaire Download PDF

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Publication number
WO1992011215A1
WO1992011215A1 PCT/GB1991/002292 GB9102292W WO9211215A1 WO 1992011215 A1 WO1992011215 A1 WO 1992011215A1 GB 9102292 W GB9102292 W GB 9102292W WO 9211215 A1 WO9211215 A1 WO 9211215A1
Authority
WO
WIPO (PCT)
Prior art keywords
trough
collar
height
tube
gob
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/GB1991/002292
Other languages
English (en)
Inventor
Lars Tore Anderson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BH-F (ENGINEERING) Ltd
Original Assignee
BH-F (ENGINEERING) Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by BH-F (ENGINEERING) Ltd filed Critical BH-F (ENGINEERING) Ltd
Publication of WO1992011215A1 publication Critical patent/WO1992011215A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B7/00—Distributors for the molten glass; Means for taking-off charges of molten glass; Producing the gob, e.g. controlling the gob shape, weight or delivery tact
    • C03B7/08—Feeder spouts, e.g. gob feeders
    • C03B7/092—Stirring devices; Homogenisation
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B7/00—Distributors for the molten glass; Means for taking-off charges of molten glass; Producing the gob, e.g. controlling the gob shape, weight or delivery tact
    • C03B7/08—Feeder spouts, e.g. gob feeders
    • C03B7/084—Tube mechanisms

Definitions

  • This invention relates to gob-forming apparatus comprising a refractory cylinder. 5
  • the glassware is formed from gobs of molten glass. These glass gobs are obtained by forcing molten glass through an orifice in the floor of a refractory
  • a refractory metering cylinder In use, this cylinder is often rotated about its longitudinal axis to stir the molten glass in the trough. Alternatively the molten glass may be stirred by the use of a rotating paddle in order to ensure the homogeneity of the glass.
  • the height of the cylinder above the floor of the trough is generally adjustable, so that by varying the cylinder's height above the trough floor, and thus also its height above the orifice(s), the rate of flow of glass to the orifice(s) is varied. In this way the metering cylinder is used to adjust the weight of the gobs used.
  • the metering cylinder is suspended in the trough from an arm mounted on a pillar to one side of the trough.
  • the cylinder is cantilevered out from the pillar, and it is generally raised or lowered, to adjust the height of the cylinder above the trough floor, by raising or lowering the pillar.
  • This arrangement puts a great deal of strain on the apparatus, and it is difficult to adjust the height of the cylinder accurately above the trough floor using such apparatus.
  • the cantilever arrangement it can be the case that the cylinder is not raised and lowered entirely vertically and thus the cylinder may become skewed with respect to the vertical axis of the apparatus, leading to inaccuracies of molten glass flow rate and resulting gob size.
  • gob-forming apparatus including a cylindrical tube adapted to circumscribe one or more plungers cooperating with one or more orifices in-the floor of a refractory trough, and means for adjusting the height of the tube from the trough to control flow of molten glass from outside the tube to the orifice(s)
  • the tube height adjustment means includes an externally screw-threaded collar surrounding the tube and fixed axially relative thereto, and a rotary ring engaged with the screw- threads of the collar, and at a fixed height above the floor of the trough, and means for rotating the ring with respect to the collar.
  • this may be achieved by installing a suitable annular bearing between the threaded collar and the tube, and providing an external sprocket or toothed ring attached to the tube.
  • the rotary ring is mounted on a bridge spanning the trough.
  • the gob-forming apparatus according to the present invention is as described in our co-pending GB patent application 90 27849.0.
  • Figure 1 is a section through a gob-forming apparatus according to the present invention, comprising a rotatably-driven metering cylinder;
  • Figure 2 is a plan view of the apparatus of Figure 1;
  • Figure 3 is a section through a gob-forming apparatus according to the present invention having a non-rotary cylinder;
  • Figure 4 is a plan view of the apparatus of Figure 3;
  • Figure 5 is a side elevation of a collar supporting the rotary metering cylinder in a preferred embodiment of the invention
  • Figure 6 is a view, part in section and part in elevation, of rollers carried by a rotary ring for lifting and lowering the collar of Figure 5;
  • Figure 7 is an axial cross-section on a larger scale, showing the construction of the rollers shown in Figures 5 and 6, and
  • Figure 8 is a plan view of the rotary ring of Figure 6.
  • the gob-forming apparatus comprises a refractory trough 1 forming a spout of a forehearth (not shown) of a glass furnace for the delivery of molten glass to the trough 1.
  • the trough 1 is made of highly thermally-insulating material, and insulating blocks 2, 3, 4 extend across the trough mouth to reduce heat loss.
  • insulating blocks 2, 3, 4 extend across the trough mouth to reduce heat loss.
  • In the floor of the trough 1 is a pair of orifices 6 and 7.
  • a support 10 comprising a pair of pillars 11, one mounted on each side of trough 1.
  • a plate 12 having in it an aperture 13 above the trough 1.
  • Various parts of support 10 are separable one from another, and are pivotally movable to permit access to various parts of the apparatus.
  • the gob-forming apparatus of Figures 1 and 2 further comprises a pair of gob-forming plungers 20, 21 mounted above and aligned with the orifices 6, 7.
  • the plungers 20 and 21 extend through the aperture 13 in plate 12, and depend from respective plunger chucks 22, 23 supported by a support jig 24.
  • the jig 24 is connected to a drive motor 25 mounted on bridge member 16.
  • the drive motor 25 drives the support jig 24, and with it plungers 20, 21, with a vertically-reciprocating motion so that the plungers move up and down with respect to their corresponding orifices 6, 7.
  • a metering cylinder 30 of refractory material is suspended from a chuck 31 and extends down through aperture 13 in plate 12 to circumscribe the plungers 20 and 21.
  • the cylinder 30 is shown in its lowermost position.
  • Chuck 31 is mounted in a gear wheel 32 engaging the drive wheel 33 of a motor 34 mounted on the support 10.
  • the drive wheel 33 extends vertically such that the gear wheel 32 can engage drive wheel 33 over a vertical range of movement of gear wheel 32.
  • Chuck 31 is also supported by a ring 40 mounted, via bearing ring 41, on a large cylinder 42 having an external screw-thread 43. Mounted around cylinder 42, and in engagement therewith, is a correspondingly internally screw-threaded nut 44. Nut 44 is provided with external gear teeth rotated by means of a meshing gear wheel 45 driven by a motor 46 mounted on plate 12. The gear wheel 45 can also be engaged by a manually- drivable cog wheel 47, also mounted on plate 12.
  • the gob-forming apparatus of Figures 1 and 2 is set up as shown. Molten glass from the glass furnace is supplied to trough 1.
  • the plungers 20, 21 are vertically reciprocated in line with orifices 6, 7. On the downward stroke of the plungers, molten glass is forced out through the corresponding orifice 6, 7 to form a gob.
  • the gob formed is cut off, in conventional manner, using gob-shearing apparatus, and removed during the upward stroke of the plunger for further processing.
  • the molten glass in trough 1 is stirred by rotation of cylinder 30, and the cylinder 30 also acts as a metering valve controlling, by its height above the floor of trough 1, the rate of flow of the molten glass to the orifices 6, 7, and thus the gob weight.
  • the cylinder 30 is rotated by means of motor 34 causing rotation of drive wheel 33.
  • Drive wheel 33 in its turn rotates gear wheel 32 on which the cylinder 30 is suspended via chuck 31.
  • the height of the cylinder 30 above the floor of trough 1 is adjusted by means of the vertical height of cylinder 42 on which the cylinder is supported, via chuck 31, support ring 40 and bearing ring 41.
  • Rotation of drive wheel 45 either by means of motor 46 or manually by cog wheel 47, causes the screw-threaded nut 44 to rotate.
  • the engagement of the internal thread of nut 44 and the external thread 43 on cylinder 42 causes the cylinder 42 to be raised or lowered, depending upon the direction of rotation. In this way the height of the cylinder 30 above the floor of trough 1 can be adjusted.
  • the plunger drive mechanism, and the means for raising, lowering and rotating the cylinder are all provided on the support 10.
  • the support 10 can be dismantled and/or parts of it pivoted out of the way to permit access.
  • the major difference between the two embodiments is that in the second one the metering cylinder 130 is non- rotary, and in that a rotatable paddle 150 projects into trough 101.
  • the paddle 150 is supported on an arm 151 movable with a gear wheel 152 mounted on plate 112 via a bearing 153 and support member 154.
  • Gear wheel 152 is rotatably driven ' by means of a drive wheel 155 of a motor 156 also mounted on the plate 112.
  • the molten glass in trough 101 is stirred by means of paddle 150.
  • the paddle 150 describes a circular path within the trough outside the metering cylinder 130.
  • the paddle 150 is driven by means of motor 156, the drive wheel 155 of which engages the gear wheel 152 on which the arm 151 on which paddle 150 is supported.
  • the gear wheel 152 on which the arm 151 on which paddle 150 is supported is driven by means of motor 156, the drive wheel 155 of which engages the gear wheel 152 on which the arm 151 on which paddle 150 is supported.
  • the various parts of the apparatus are supported across the trough.
  • the support 101 can be partially dismantled and various parts pivoted away from the trough for maintenance.
  • the collar 42 of Figure 1 is replaced by a collar 200 having a three-start helical thread 202 on its outer surface.
  • the collar depends from a ring 204 having in it a slot in which works a fixed vertical pin 206 to ensure that the collar does not rotate as its height from the trough 1 of Figure 1 is adjusted.
  • a ring 210 is supported for relative rotation.
  • the ring 210 is analogous to ring 32 of Figure 1 in that it takes the weight of metering cylinder 30 and is able to be rotated continuously to keep the molten glass stirred by means of cylinder 30.
  • Engaging the threads 202 are three pairs of rollers 212 carried by a ring 214 having its weight borne in turn by an annular support 216, through a ball race 218, the support 216 being attached to the platform 12 spanning the trough.
  • the rollers of each pair 212 engage the substantially triangular sectioned thread 202 in a manner in which the weight of the collar 200 is transferred to ring 214.
  • the pairs of rollers 212 are mounted on ring 214 at angles of 120° from each other. As there are three helical threads 202, they are contacted by rollers 212 in a plane perpendicular to the axis of collar 200.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)

Abstract

Appareil de verrerie servant à former des paraisons de verre fondu. Une paraison est formée par l'action de pistons alternatifs verticaux (20, 21) poussant le verre à travers des orifices (6, 7) ménagés dans le fond d'une cuve (1), puis par des lames de cisaille qui sectionnent la paraison sous la cuve. La grosseur des paraisons est déterminée par la quantité de verre fondu poussée à travers les orifices (6, 7) par les pistons (20, 21), et cette quantité est elle-même déterminée en fonction de l'élévation par rapport au fond de la cuve (1) de l'extrémité inférieure d'un tube doseur (30) entourant les pistons (20, 21). L'élévation de ladite extrémité inférieure du tube (30) est réglable grâce à un collier fileté (42) déplaçable dans le sens axial avec lequel se trouve en prise une bague (44) montée rotative autour du collier (42) à un niveau fixe au-dessus de la cuve (1).
PCT/GB1991/002292 1990-12-21 1991-12-20 Appareil de formation de paraisons comprenant un cylindre refractaire Ceased WO1992011215A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB909027850A GB9027850D0 (en) 1990-12-21 1990-12-21 Gob forming apparatus,including refractory cylinder
GB9027850.8 1990-12-21

Publications (1)

Publication Number Publication Date
WO1992011215A1 true WO1992011215A1 (fr) 1992-07-09

Family

ID=10687471

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1991/002292 Ceased WO1992011215A1 (fr) 1990-12-21 1991-12-20 Appareil de formation de paraisons comprenant un cylindre refractaire

Country Status (5)

Country Link
AU (1) AU9121491A (fr)
CS (1) CS394391A3 (fr)
GB (1) GB9027850D0 (fr)
WO (1) WO1992011215A1 (fr)
ZA (1) ZA9110035B (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1626705A (en) * 1923-04-28 1927-05-03 Owens Bottle Co Glass feeder
US1852218A (en) * 1925-11-07 1932-04-05 Hartford Empire Co Method of and apparatus for feeding molten glass
US2305739A (en) * 1939-05-09 1942-12-22 Shackelford Orie Apparatus and method for charging molds with molten glass

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1626705A (en) * 1923-04-28 1927-05-03 Owens Bottle Co Glass feeder
US1852218A (en) * 1925-11-07 1932-04-05 Hartford Empire Co Method of and apparatus for feeding molten glass
US2305739A (en) * 1939-05-09 1942-12-22 Shackelford Orie Apparatus and method for charging molds with molten glass

Also Published As

Publication number Publication date
AU9121491A (en) 1992-07-22
GB9027850D0 (en) 1991-02-13
CS394391A3 (en) 1992-08-12
ZA9110035B (en) 1992-09-30

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