A butterfly cable production line and a production process for preventing optical fiber retraction

Abstract

The invention discloses a butterfly cable production line and a production process for preventing optical fiber retraction. During butterfly cable production, the pay-off tension of the optical fiber (5) is 50-70g, and the pay-off tension of the reinforcing member (50) is 700-1400g. The take-up tension of the wire device (4) is 25±2N, the cooling device (2) includes a plurality of cooling water tanks whose water temperature gradually decreases, and the male mold (70) is provided with a pipe portion (703) extending into the extrusion cavity (72). ), the optical fiber (5) is threaded in the tube part (703), and the distance L between the tube part (703) and the master mold (70) is 1-3 mm. In the butterfly cable prepared by the present invention, the stress between the optical fiber and the sheath is more reasonable. After being placed at 80°C for 24 hours and cooled to room temperature, the shrinkage of the optical fiber is greatly reduced, and the average shrinkage of the optical fiber is ≤0.3mm. It is conducive to ensuring the production quality and yield of butterfly cables and improving product competitiveness.

Description

technical field [0001] The invention relates to the technical field of butterfly cable production, in particular to a butterfly cable production line and a production process for preventing optical fiber retraction. Background technique [0002] The butterfly cable needs to have good stability after production. For example, when the temperature difference changes greatly, the degree of retraction of the optical fiber should not be too large to prevent the optical fiber from breaking or poor contact. Taking the prefabricated end butterfly cable as an example, the prefabricated end butterfly cable refers to a butterfly-shaped lead-in optical cable in which connector plugs 90 are prefabricated at one end or both ends of the butterfly cable 9 in the factory, such as Figure 5 shown. It is usually required that the working and storage temperature range of the prefabricated butterfly cable is -25~+70°C, and the environmental performance requires that the prefabricated butterfly ca...

AI Technical Summary

Problems solved by technology

After the butterfly cable produced according to the original process is made into a prefabricated end, the average length of the optical fiber retracts is about 1.5mm, which causes the optical fiber to break in the connector. Even if it does not break, it is easy to cause poor contact due to excessive retraction of the optical fiber. , the yield rate is low, which brings difficulties to the use and promotion

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