A device for improving the sealing performance of uv curing furnace

Abstract

The invention discloses a device for improving sealing performance of a UV curing furnace. A main body of the device is a UV curing furnace. The device is characterized by also comprising a lower opening sealing air inlet device arranged at the lower end of a central pipe of the UV curing furnace, an upper opening sealing air exhaust device arranged at the upper end of the central pipe of the UV curing furnace and an upper opening air exhaust regulating device arranged on the upper opening sealing air exhaust device. According to the device disclosed by the invention, by virtue of the arrangement of the lower opening sealing air inlet device and the upper opening sealing air exhaust device of the central pipe of an optical fiber UV curing furnace, external air can be further prevented from entering the central pipe of the UV curing furnace based on an existing device generally; and meanwhile, certain proportions of oxygen and nitrogen can be balanced, and the external air can be prevented from entering the central pipe, so that the proportion of nitrogen to oxygen in the central pipe can be further stabilized.

Description

technical field [0001] The invention relates to a device for improving the sealing performance of a UV curing furnace, which belongs to the field of optical fiber drawing production and manufacturing. Background technique [0002] During high-speed wire drawing production, the optical fiber enters the UV tube at high speed and also brings in a part of oxygen. The presence of oxygen during the curing process of the UV-curable coating will affect the polymer polymerization reaction of the optical fiber polymer coating. If the oxygen content is high, in Under the action of oxygen, the lower layer is often cured, and the surface is still uncured and sticky. Therefore, the inert gas nitrogen is often used to reduce the oxygen content to accelerate curing. If the oxygen content is very low, the volatile substances in the coating will condense in the center. The inner wall of the tube affects the transmittance of ultraviolet light, so it is necessary to increase the proportion of o...

AI Technical Summary

Problems solved by technology

However, if the air volume at the exhaust outlet is too large, the flow rate of nitrogen and oxygen will be accelerated, causing the flow rate to fail to keep up with the flow rate, causing external air to enter the central tube and affecting the curing performance of the optical fiber. If the air volume is too small, it will cause Volatile matter cannot be excluded from the center tube, and condenses on the inner wall of the center tube, which will affect the transmittance of ultraviolet light in the curing furnace

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