US 11,808,520 B2
Arrangement of a furnace and of bulk material of glass particles as well as method for operating a furnace
Rudolf Jussel, Feldkirch-Gisingen (AT); and Harald Bürke, Frastanz (AT)
Assigned to Ivoclar Vivadent AG, Schaan (LI)
Appl. No. 16/349,743
Filed by Ivoclar Vivadent AG, Schaan (LI)
PCT Filed Nov. 14, 2017, PCT No. PCT/EP2017/079187
§ 371(c)(1), (2) Date May 14, 2019,
PCT Pub. No. WO2018/091457, PCT Pub. Date May 24, 2018.
Claims priority of application No. 16198859 (EP), filed on Nov. 15, 2016.
Prior Publication US 2020/0072552 A1, Mar. 5, 2020
Int. Cl. A61C 13/20 (2006.01); F27B 17/02 (2006.01); A61K 6/853 (2020.01); A61C 13/083 (2006.01); C03B 19/09 (2006.01); C03C 1/06 (2006.01); C03C 10/00 (2006.01); F27D 3/00 (2006.01); F27D 19/00 (2006.01)
CPC F27B 17/025 (2013.01) [A61C 13/083 (2013.01); A61C 13/20 (2013.01); A61K 6/853 (2020.01); C03B 19/09 (2013.01); C03C 1/06 (2013.01); C03C 10/00 (2013.01); F27D 3/0033 (2013.01); F27D 19/00 (2013.01); F27D 2019/0003 (2013.01); F27D 2019/0028 (2013.01); F27D 2019/0071 (2013.01)] 24 Claims
OG exemplary drawing
 
1. An arrangement of a furnace and of bulk material of glass particles comprising
a furnace, and
bulk material of glass particles,
wherein said furnace comprises
a muffle,
a pressing punch,
a pressure, distance and/or speed sensor and
a process controller configured for controlling a pressing process based on an output signal of the sensor,
wherein the sensor detects at least a pressure, position and/or motion parameter of the pressing punch,
wherein the pressing punch acts on the bulk material of glass particles,
wherein said glass particles are guided and crystallizable in a press channel,
wherein trigger criterion for the process controller is a change of at least a motion parameter of the pressing punch upon softening of the bulk material of glass particles which change is detected by the sensor,
wherein the sensor, below the softening temperature of the bulk material of glass particles, detects the thermal expansion of the muffle, a ram of the pressing punch, and the bulk material of glass particles, said thermal expansion counteracting the press force.