A kind of optical glass forming mold device

Abstract

Belonging to the technical field of optical glass forming, the invention provides an optical glass forming mould device, and mainly solves the optical glass strip rounded corner and surface flat forming problems. The main scheme includes that: a mould rear baffle plate is equipped with mould rear baffle plate cooling channels and a mould rear baffle plate temperature thermocouple; a bottom die isequipped with bottom die cooling channels and a bottom die temperature thermocouple; side dies are respectively equipped with a side die heating module and a side die temperature thermocouple; two sides of a roller are respectively connected to rolling wheels through a rolling shaft, two sides of the roller fit the inner sides of the two side dies, the two rolling wheels respectively cooperate with the slideways outside the two side dies, the roller is equipped with a roller cooling channel and a roller temperature thermocouple, the bottom die, the two side dies and the roller form a square forming cavity, under the action of tractive force, molten glass with a transition point Ts temperature range of 0-+50DEG C passes through the square forming cavity, and a square section glass strip with small rounded corner and good surface flatness can be obtained. The device improves the formed appearance quality and meets the needs of customers.

Description

technical field [0001] The invention belongs to the technical field of optical glass molding, and relates to a device for optical glass strip molding. Background technique [0002] After the optical glass is smelted at high temperature, it is necessary to use a forming mold device to condense the molten glass into the desired shape. In the field of optical glass molding, strip molding is currently the main molding method, but during the molding process of the strip, the molten glass is spread from points to surfaces, and the molten glass has the characteristics of rapid solidification as the temperature decreases, so Defects such as local depressions, protrusions, or large parallel differences often occur during the natural molding of optical glass strips, such as Figure 4 As shown, in the past, customers can accept it after modifying the surface shape. However, in recent years, with the increase in the price of optical glass materials, customers require smaller and smalle...

AI Technical Summary

Problems solved by technology

In order to meet customer needs and avoid defects caused by natural molding by molds, patting or rolling molding is often used to make up for the defects of natural molding, but because patting or rolling has strict requirements on the forming viscosity and material properties of glass—— Forming glass with high viscosity and long material properties, but there are few glass grades suitable for this characteristic, and only a small part of crown glass with high viscosity and high viscosity is suitable

Moreover, patting or rolling forming is generally only suitable for the production of strips with a thickness of less than 15mm, and the high viscosity of glass forming results in large rounded corners and waste, high maintenance costs during the production process, and great limitations in economy and versatility.

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