Glass manufacturing – Processes – With program – time – or cyclic control
Patent
1994-06-27
1997-12-02
Czaja, Donald E.
Glass manufacturing
Processes
With program, time, or cyclic control
65 2921, 651351, 65DIG13, 395904, C03B 524
Patent
active
056931107
ABSTRACT:
A process for controlling the temperature of glass inside a forehearth for the formation of gobs comprises the steps of: determining a set temperature of the glass in the zone No. 1 by effecting a fuzzy inference based on a preset membership function and a preset inference rule of a preset fuzzy set by using two variables, i.e., a deviation between a measured temperature and a set temperature of glass in the spout portion and a timevarying change amount between a temperature measured at a current measurement and a temperature measured at a previous measurement with respect to the glass in the spout portion, as an antecedence; determining a set temperature of the glass in each of zone Nos. 2 and 3 through a fuzzy inference based on a preset membership function and a preset inference rule of a preset fuzzy set through taking two variables, i.e., a deviation amount between a temperature of the glass measured in each of the zone Nos. 2 and 3 and a set temperature of the glass therefor and a time-varying change amount between a temperature measured at a current measurement and a temperature measured at a previous measurement, as an antecedence; and controlling an amount of a combustion gas through each burners by adjusting a set open degree of each cooling valve and a set value of the glass in each of the zone Nos. 1 through 3 based on the set temperatures determined.
REFERENCES:
patent: 3915682 (1975-10-01), Chotin et al.
patent: 4028083 (1977-06-01), Patznick et al.
patent: 4375369 (1983-03-01), Border et al.
patent: 5272621 (1993-12-01), Aoki
patent: 5358541 (1994-10-01), Kindall
Iwaihara Eiji
Kano Motoo
Konishi Masahiro
Czaja Donald E.
Ishizuka Glass Co., Ltd.
OC Engineering Co., Ltd.
Vincent Sean
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