Hot bending glass graded forming die

Abstract

The invention relates to a hot bending glass graded forming die which comprises a preforming frame, a forming frame and a control module for controlling the preforming frame to move up and down. The preforming frame comprises a plurality of first arc-shaped fixing frames and a pair of movable preforming shelves connected to the two ends of the first fixing frame in a pivoted mode. The forming frame comprises a plurality of second arc-shaped fixing frames and forming shelves arranged at the two ends of the second arc-shaped fixing frames. Gaps are formed between the first arc-shaped fixing frames and the second arc-shaped fixing frames, and the first arc-shaped fixing frames are staggered above the second arc-shaped fixing frames. Through the graded formation, the problem that glass generates fold lines due to stress oppression is solved, frills caused by too large local deformation of the glass resulting from one-time self weight forming of a conventional die are avoided, the optical distortion is greatly reduced, the optical property of a glass plate is improved, die hinge traces are eliminated, and the product appearance quality is improved.

Description

technical field [0001] The invention relates to a molding die, in particular to a step-by-step molding die for hot-bending glass, which belongs to the technical field of material molding control. Background technique [0002] In the existing hot bending process of laminated flat glass, a laminated flat glass of a certain shape and size is placed on a hollow forming ring that matches the size and shape, and the glass is heated at a certain temperature after positioning the laminated flat glass, so that It softens and deforms under the action of gravity, the deformation of the edge of the glass is in contact with the mold frame, and its bending degree is limited by the bending degree of the mold frame, and the spherical deviation of the middle part of the glass is also related to the bending degree of the mold frame. Box and heating conditions are controlled. In the actual production process, where the curvature of the ring frame is large, such as the corners of the laminated...

AI Technical Summary

Problems solved by technology

In the actual production process, where the curvature of the ring frame is large, such as the corner of the laminated flat glass, it is easy to produce sticky damage, which affects the yield of the product

Especially in the production of products with a large degree of curvature, additional pressure needs to be applied to the laminated flat glass at the corner during hot bending, which is more likely to cause damage in the form of sticking at the corner, and the yield rate is lower

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