Method of an apparatus for bend-shaping a glass plate and bendin

Details Method of an apparatus for bend-shaping a glass plate and bendin Method of an apparatus for bend-shaping a glass plate and bendin

1991-03-01

1993-01-12

Woodard, Joye L.

Glass manufacturing

Processes

Reshaping or surface deformation of glass preform

65107, 65287, 65291, C03B 23027, C03B 2303

Patent

active

051786591

ABSTRACT:
The method and the apparatus for bend-shaping a glass plate of the present invention a bending mold which includes a fixed split mold portion having a bend-shaping surface which corresponds to an intermediate curved portion of the glass plate and movable split mold portions each of which has a bend-shaping surface corresponding to the side portions of the glass plate having the predetermined shape and which are respectively placed at the sides of the fixed split mold portion so that the bend-shaping surfaces are movable around pivotal shafts for movement into alignment with the bend-shaping surface of the fixed split mold portion. The method includes a press-shaping step including heating the glass plate placed on the bending mold in a heating furnace and pressing from via an auxiliary pressing member the portion to be deeply bent of the glass plate while the glass plate is placed on the bending mold. The position of the pivotal shafts of the bending mold are positioned further from said fixed split mold portion than is said bend-shaping surface of said movable split mold portion, such that a moment of force at each of the pivotal shafts which acts on each of the movable split mold portions at the time of press-shaping prevents the bending mold from developing during press shaping.

REFERENCES:
patent: 2330349 (1943-09-01), Galey
patent: 2452488 (1948-10-01), Paddock et al.
patent: 4229201 (1980-10-01), Comperatore et al.
patent: 4804397 (1989-02-01), Stas et al.

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