Glass manufacturing – Preform reshaping means – Sheet bending mold
Patent
1990-08-24
1992-01-14
Lindsay, Robert L.
Glass manufacturing
Preform reshaping means
Sheet bending mold
65106, 65273, 65350, 65351, C03B 2704
Patent
active
050799312
ABSTRACT:
The invention relates to a glass sheet bending or supporting mould which is made primarily by casting of a ceramic material and which includes a curving or flat shaping surface, a number of orifices (10, 11) in a shaping surface (7, 8) as well as channels (16, 17) extending through the mould material and in communication with orifices (10, 11). Said channels (16, 17) are formed as distribution channels common to a plurality of orifices (10, 11) and connected to each other by means of transverse connecting channels (161, 171) for building a ladder-like or lattice-like distribution manifold (16, 161; 17, 171). The invention relates also to a mould manufacturing method, wherein a ceramic-based material is cast in a manufacturing mould which, prior to a casting operation, is fitted with a temporary filling matching a desired distribution manifold and having a ladder-like or lattice-like configuration. Following a casting operation, the temporary filling is removed by using at least one of the following methods: baking for discharging the filling material as flue gases; dissolving with a solvent; heating for turning or releasing the material to a flowing or running state.
REFERENCES:
patent: 3468645 (1969-09-01), McMaster et al.
patent: 3526489 (1970-09-01), McPhail
patent: 3819349 (1974-06-01), Shimizu et al.
patent: 4767437 (1988-08-01), Lampman et al.
patent: 4767439 (1988-08-01), Reunamaki
patent: 4802903 (1989-02-01), Kuster et al.
Lehto Esko O.
Vehmas Jukka H.
Lindsay Robert L.
Tamglass Oy
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