Secondarily formed automotive glass hot bending mould

Abstract

The invention provides a secondarily formed automotive glass hot bending mould. A primary forming process is added before final forming of glass. In the primary forming process, the middle portion of the glass is only formed to prevent defects of rake angles, swells, fractures and the like of spherical large glass which is directly formed in an outer forming frame; a limiting device is additionally arranged in an inner forming frame, so that formed positioning of the glass is reduced, and the accuracy of follow-up glass forming is ensured; and the optical distortion of the glass is effectively reduced by a secondary forming hot bending mould, the optical property of the glass is improved, and meanwhile, the condition of glass abandonment is reduced, and the rate of finished products is increased.

Description

technical field [0001] The invention belongs to the technical field of hot-bending forming of automobile glass, and in particular relates to a hot-bending mold for secondary molding of automobile glass. Background technique [0002] At present, with the development of the automobile industry, the diversification of automobile shapes, the streamlined automobile design makes the front glass of the automobile have a large spherical surface, a large arch height, and a large curvature of the side. It is easy to have a large forming position deviation. Now not only the curvature and radian of automobile glass are getting bigger and bigger and the shape is more and more complex, but also the optical performance and appearance quality requirements of the glass are gradually improving. One-time forming hot bending molds have the disadvantages that the local deformation of the glass is too large, resulting in ruffles, warped corners, and bulges. When using the existing automobile la...

AI Technical Summary

Problems solved by technology

[0002] At present, with the development of the automobile industry, the diversification of automobile shapes, the streamlined automobile design makes the front glass of the automobile have a large spherical surface, a large arch height, and a large curvature of the side. It is easy to have a large forming position deviation

Now not only the curvature and radian of automobile glass are getting bigger and bigger and the shape is more and more complex, but also the optical performance and appearance quality requirements of the glass are gradually improving. One-time forming hot bending mold has the disadvantage that it is easy to make the local deformation of the glass too large, resulting in ruffles, warped corners, and bulges

When using the existing automotive laminated glass press molding mold to produce this kind of glass, it is easy to produce side refraction and wave quality defects, which makes the yield of this kind of product low, and some types of products can no longer meet the increasingly high optical requirements of car manufacturers. Quality requirements such as performance and fit deviation and deviation fluctuation

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