EP2523913A1 - Procédé et dispositif de production de verre expansé sous pression - Google Patents

Procédé et dispositif de production de verre expansé sous pression

Info

Publication number
EP2523913A1
EP2523913A1 EP11708940A EP11708940A EP2523913A1 EP 2523913 A1 EP2523913 A1 EP 2523913A1 EP 11708940 A EP11708940 A EP 11708940A EP 11708940 A EP11708940 A EP 11708940A EP 2523913 A1 EP2523913 A1 EP 2523913A1
Authority
EP
European Patent Office
Prior art keywords
glass
feed
extrusion chamber
chamber
foaming agent
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.)
Withdrawn
Application number
EP11708940A
Other languages
German (de)
English (en)
Inventor
Gunnar SVEINSBØ
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.)
Glassolite Ltd
Original Assignee
Glassolite 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 Glassolite Ltd filed Critical Glassolite Ltd
Publication of EP2523913A1 publication Critical patent/EP2523913A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B19/00—Other methods of shaping glass
    • C03B19/08—Other methods of shaping glass by foaming

Definitions

  • the invention relates to the production of foamed glass based on the extrusion principle, and, more specifically, it relates to a method as disclosed in the preamble of independent claim 1 , and a device as disclosed in independent claim 3.
  • the object of the invention is to remedy the defects of the known techniques, and this is achieved by means a method and a device of the type mentioned above, which are characterised by the features disclosed in the characterising clause of the respective independent claims.
  • expansion or foaming agent is added to molten glass under pressure in a heat range that is optimal for the process.
  • the invention provides the option of a device for feed-in of expansion or foaming agent into an extrusion chamber with molten glass under pressure in the extrusion process.
  • Glass is fed into the melting chamber by a feed screw or similar device and is melted in the melting furnace to an optimal temperature for the process.
  • a device is also provided that is of importance for supplying thermal energy in the centre of the melting furnace.
  • the invention makes it possible to provide an arrangement of a feed screw or similar device which is located in a chamber in the extension of the melting chamber and constitutes a container in which molten glass is mixed with expansion or foaming agent and passed into the extrusion chamber, which has an optimal form for the final mixing step in the mixing process.
  • the invention relates to a device where feed-in of expansion or foaming agent is handled by a feed screw or similar device which will displace the back pressure from the molten glass and permit mixing under pressure through to the extrusion chamber outlet.
  • nozzles provided in the outlet of the extrusion chamber, which are essential to the control of the production process.
  • process-controlled valves are used to adjust the nozzle orifice and thus the quality of the foamed glass product and the magnitude of the volume flow which expands through the nozzle.
  • Tests have shown that by increasing or decreasing the pressure in the extrusion chamber, the size of the air voids in the end product, the foamed glass, will also vary correspondingly, giving corresponding variation in the density of the product.
  • the pressure in the mixing chamber in one of several variants, can be provided by calculation of height of the glass column containing liquid glass.
  • Reference numeral 1 indicates a device for introducing glass into the melting chamber
  • 6 indicates a feed housing / tube for the feed screw; 7 indicates a mixing chamber / extrusion chamber;
  • 1 1 indicates a sensor for recording zone temperature in the molten mass and / or the extruder; 12 indicates a pressure sensor for the extrusion chamber;
  • 16 indicates an outlet pipe / safety valve for any gases that may be produced in the chamber; 17 indicates heating elements which supply heat to the melting chamber / mixing chamber / extrusion chamber;
  • the drawing shows a device 1 for introducing glass into the feed screw 2 which then passes the glass into the melting chamber 3.
  • the glass is supplied with heat energy from the heat sources / heating elements 17 and the internal heat source 4 that melts the glass which is passed by the feed screw 5 into the feed housing / tube 6 that is surrounded by heating elements 17.
  • the feed screw 13 In the area within the feed housing / tube 6, the feed screw 13 has its outlet and here expansion or foaming agent is introduced through the feed screws or the like 13 and 13.1 , which must have a favourable geometric location that allows them to provide a pre-determined pressure in relation te the pressure in the extrusion chamber 7 with access to expansion or foaming agent through the introduction device 14.
  • the feed screw 5 When the feed screw 5 is rotated, it draws with it molten glass which passes the outlet from the feed screw 13, where molten glass and expansion or foaming agent flow together and start a mixing process under pre-determined pressure through to the extrusion chamber 7, where the mixture is given a final stirring by the mixer 8 as it moves towards the outlets 9 through an adjustable outlet nozzle 10, where the expansion takes place and the mixture in the extrusion chamber 7 becomes foam that is cooled from a liquid state into a solid form as the product, foamed glass, is formed.
  • Sensors 1 1 and 12 record the temperature and the pressure in the extrusion chamber 7, which are of major importance for process control.
  • the melting chamber 3 has sensors 15, which sense and record the zone
  • the purpose of the outlet pipe 16 is to release gases which may be produced during the melting process in the melting chamber 3 and also to be able to evacuate undesired pressure.
  • the extrusion chamber 7 outlet pipe 9, feed housing / tube 6 and heating chamber 3 with internal heating profile / stirrer 4 are produced of heat resistant material and are surrounded by heating elements 17 which, together with the internal heating profile 4, are controlled by the sensors / thermostats 15 and 1 1 to a pre-determined temperature in the melting chamber 3 and in the extrusion chamber 7 with separate pressure sensor 12
  • suitable external insulation 18 in the form of a "frame" for the production unit.

Abstract

L'invention concerne un procédé et un dispositif de production de verre expansé, selon lequel du verre / du calcin est introduit dans une chambre (3) de fusion à l'aide d'une vis (2) d'alimentation et du verre fondu est envoyé dans la chambre (7) d'extrusion par la vis (5) d'alimentation à travers le carter / le tube (6) d'alimentation en vue de son extrusion subséquente, un agent moussant ou un additif d'expansion étant amené sous pression positive par une vis (13) et (13.1) d'alimentation, et mélangé au verre fondu dans la phase d'introduction de la chambre (7) d'extrusion par la vis (5) d'alimentation, et enfin mélangé par un mélangeur (8) avant l'expansion du verre expansé à travers des buses réglables (10) en vue de son refroidissement.
EP11708940A 2010-01-13 2011-01-10 Procédé et dispositif de production de verre expansé sous pression Withdrawn EP2523913A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO20100058A NO20100058A1 (no) 2010-01-13 2010-01-13 Fremgangsmate og anordning for produksjon av skumglass under trykk
PCT/NO2011/000013 WO2011087373A1 (fr) 2010-01-13 2011-01-10 Procédé et dispositif de production de verre expansé sous pression

Publications (1)

Publication Number Publication Date
EP2523913A1 true EP2523913A1 (fr) 2012-11-21

Family

ID=43989779

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11708940A Withdrawn EP2523913A1 (fr) 2010-01-13 2011-01-10 Procédé et dispositif de production de verre expansé sous pression

Country Status (3)

Country Link
EP (1) EP2523913A1 (fr)
NO (1) NO20100058A1 (fr)
WO (1) WO2011087373A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3140259A1 (fr) * 2014-05-05 2017-03-15 Glassolite Ltd Appareil et procédé de production de verre cellulaire et matériau de verre cellulaire
EP3250529B1 (fr) * 2015-01-29 2019-07-03 Glassolite Ltd Appareil et procédé pour la fabrication de verre mousse par extrusion

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO324624B1 (no) * 2001-05-28 2007-11-26 Odd Bjornestad Fremgangsmate til fremstilling av skumglass ved bruk av en ekstruderingsapparatur

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2354807A (en) * 1937-12-24 1944-08-01 Pittsburgh Plate Glass Co Manufacture of vesicular glass
US2215223A (en) * 1937-12-30 1940-09-17 Pittsburgh Plate Glass Co Porous material manufacture
US3574583A (en) * 1968-01-29 1971-04-13 Lockheed Aircraft Corp Process for preparing foam glass insulation
US3628937A (en) * 1970-08-05 1971-12-21 Lawrence A Schott Apparatus for making foamed glass panels

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO324624B1 (no) * 2001-05-28 2007-11-26 Odd Bjornestad Fremgangsmate til fremstilling av skumglass ved bruk av en ekstruderingsapparatur

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO2011087373A1 *

Also Published As

Publication number Publication date
WO2011087373A1 (fr) 2011-07-21
NO20100058A1 (no) 2011-07-15

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