Glass manufacturing – Preform reshaping means – Sheet bending mold
Patent
1979-11-02
1981-09-22
Kellogg, Arthur D.
Glass manufacturing
Preform reshaping means
Sheet bending mold
65106, 65273, C03B 2303
Patent
active
042907969
ABSTRACT:
Apparatus for shaping glass sheets to a complicated shape including a longitudinal component of bend and a complicated transverse component of bend within a tunnel-like lehr. An outline mold with guides for aligning one or more glass sheets for proper orientation and alignment thereon supports the glass while the glass is bent by gravity sagging to provide a longitudinal component of bend and to deliver the sag bent glass to a position between upper and lower pressing molds having complementary shaping surfaces conforming to a complicated bend including a complicated transverse bend component. Special alignment means are provided to orient and align the outline mold relative to said pressing molds so that the lower pressing mold can lift the sag bent glass off the outline mold into engagement with the upper pressing mold to impress the transverse bend component and return the glass with its complicated shape to the outline mold for controlled cooling and removal from the lehr. When two glass sheets are shaped simultaneously in this manner, they conform exactly to the shape of each other so closely that they can be laminated readily to form a laminated windshield of complicated shape for installation in exact registration with a shaped mounting frame of a vehicle.
The upper pressing mold may be omitted in cases where thin glass sheets are bent to relatively shallow curvatures which may involve complicated shapes and/or outlines.
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Fisher Joseph J.
Reese Thomas J.
Kellogg Arthur D.
Lepiane Donald Carl
Mates Edward I.
PPG Industries Inc.
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