Process for optical fiber drawing and primary coating
A technology of secondary coating and optical fiber, which is applied in the field of optical fiber drawing and primary coating process, to achieve the effect of saving energy consumption, protecting the performance of optical fiber, and being beneficial to production efficiency
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Embodiment 1
[0018] An optical fiber drawing and one-time coating process, comprising the following steps carried out in sequence:
[0019] 1) Put the preform in the heating furnace to soften the preform;
[0020] 2) Under the traction force of winding, the optical fiber is led out from the top of the preform rod to obtain a coiled optical fiber product. In step 2), a coating process is carried out synchronously with step 2), and the coating process is Coating container and curing equipment are set on the pulling and moving route of the optical fiber, so that the optical fiber drawn from the top of the preform passes through the coating container and curing equipment respectively, and the impregnation of the coating and the curing on the surface of the optical fiber are completed, and the coating The coating container is a guide tube coater.
[0021] In this embodiment, the coating process in the optical fiber manufacturing process is integrated into the drawing process, so that a coating...
Embodiment 2
[0023] This example is further limited on the basis of Example 1. As a specific coating scheme, the coating liquid used in the coating process is ethylene-vinyl acetate copolymer, and the coating temperature is between 47°C and 53°C. between ℃.
[0024] In order to enable the optical fiber at the outlet of the heating furnace to enter the coating process faster, to improve the production efficiency of the optical fiber and ensure the surface quality of the optical fiber, the coating process is arranged on the outlet end of the heating furnace. A cooling process is provided. The above cooling process can be realized by circulating cooling water and passing through drying equipment.
[0025] In order to avoid the impact of sudden cooling on the quality and performance of the optical fiber, further, the cooling process is carried out in multiple steps, that is, the cooling process is to sequentially set a plurality of cooling environments with gradually lower temperatures on the...
Embodiment 3
[0027] This embodiment is further limited on the basis of any one of the above embodiments. In order to facilitate the coating quality, the curing device is provided with an inert gas protective atmosphere.
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