Width control system of overflow molding glass substrate

Abstract

The invention provides a width control system of an overflow molding glass substrate. The width control system of the overflow molding glass substrate comprises two plate width control devices which have the same structure and are symmetrically arranged at the two ends of the glass substrate; the two plate width control devices are used for controlling the width of the glass substrate; each the plate width control device comprises two clamping rollers which rotate oppositely; the two clamping rollers are horizontally arranged on the positive and negative sides of the glass substrate; a connecting shaft is arranged on the end parts of the clamping rollers; the connecting shaft is connected with a driving device; a cooling channel for cooling the clamping rollers is arranged on the connecting shaft; the aim of controlling the width of the glass plate is fulfilled by rapidly cooling the glass side plates; and heat-insulating layers are arranged on the outer sides of the clamping rollers,so that influences on a temperature field of a drainage plate area can be reduced maximally.

Description

technical field [0001] The invention relates to substrate glass manufacturing equipment, which belongs to the field of special equipment, in particular to a glass substrate glass overflow molding width control device. Background technique [0002] In the production of substrate glass by the overflow method, when the molten glass enters the forming area, the molten flow has not yet entered the strain point and there is internal stress, and the flat glass in the molten state will shrink inward, not only the width cannot be guaranteed, but also the thickness will be reduced. Uniformity is difficult to guarantee. [0003] The existing practice is to add a set of plate width control devices at the edge of the glass in this temperature range. When the molten glass flows down through the guide plate, the glass plate will no longer flow to It shrinks inside and maintains it within a certain width range, and then enters the temperature precise control area of ​​forming, and graduall...

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Problems solved by technology

[0004] However, due to the cooling air passing through the plate width control device, while cooling the glass clamping edge, it also has a certain impact on the temperature field around the drainage plate. In severe cases, it will affect the flow stability of the glass and even cause drainage. Crystallization in the plate area, resulting in quality defects such as product weight fluctuations and plate width fluctuations

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