Device and method for forming glass product by spinning method

Abstract

The invention relates to a method and a device for forming a glass product by a spinning method, which belong to the field of the processing of glass.The device for forming glass liquid comprises a forming die, a driving device and an installation and positioning device, wherein the forming die comprises a female die and a male die, the middle of the bottom of the female die is provided with a perforation, and a top bowl of the female die is penetrated in the perforation; the driving device comprises a power device, a rotation control device of the female die, a lifting device and another lifting device, wherein the rotation control device of the female die is connected with the female die, the lifting device is connected with the top bowl of the female die, and another lifting device is connected with the male die. In the invention, after transient rotation is carried out on the glass liquid which is cast in the female die, heat in the glass liquid is emitted to a certain extent. At the moment, the male die is used for carrying out extrusion, and a hemispherical glass sphere cover product with large caliber and high accuracy can be obtained.The device and the method can not only avoid the defects of air bubbles, crystallization and the like of the glass product but also can obtain the glass product with smooth surface and high accuracy.

Description

technical field [0001] The invention belongs to the technical field of glass product forming, relates to a glass product forming method and a glass product forming device, and in particular provides a large-diameter, high-precision, hemispherical glass product forming method and a corresponding glass product forming device. Background technique [0002] With the development of glass application technology, the demand for large-diameter and hemispherical glass products used in high-level lighting, scientific instruments, and photoelectric detection systems is increasing. Generally speaking, there are usually three methods for forming such glass products. : Rotation method (also known as centrifugal method), primary pressing method (also known as pressing method), secondary pressing method (also known as hot bending method). [0003] The centrifugal method is a method in which molten glass of a specified weight and suitable for forming viscosity is cast into a mold, and formed...

AI Technical Summary

Problems solved by technology

[0004] When forming by centrifugal method, it is difficult to manufacture glass products with high precision due to a single centrifugal force, and the formed products are prone to defects such as uneven wall thickness; when forming by pressing method, due to the high temperature of the glass liquid itself, direct pressing Bubbles are easy to be generated during the process; when the hot bending method is used for forming, the glass plate needs to be annealed first, and the glass plate needs to be heated during the second pressing process. This forming method consumes high energy and has low efficiency.

In addition, it is easy to cause crystallization and devitrification of glass products during the hot bending forming process.

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