Manufacturing process for single-core beam tube of large excess length

Abstract

The invention provides a manufacturing process for single-core beam tube of large excess length, which can manufacture a single-core beam tube with its large excess length requirement being 2.0 to 2.5 per thousand. With the invention, a user's requirement for tensile strain of the fiber can be fulfilled and so are the tension requirement and long-term operated tension requirement in constructions at the same time. The optical fiber, released from a coil holder with some tension force, passes in sequence an ointment filling system and a plastic extruding system wherein the viscosity of the fiber paste in the ointment filling system is required to be no less than 22000 mPa.s and the drop point equal to 220 degrees or above at the temperature of 25 degrees. The selected materials for the plastic extruding system are fast crystallization PBT materials. Following that, the exterior part of the single-core optical fiber is wrapped by ointment and a loosened sleeve successively to form a half-finished product. The half-finished product is put successively into a first water tank with water temperature being 58 degrees to 62 degrees and a second water tank with water temperature being 55 degrees to 57 degrees. Then, the half-finished product enters a wheel attracted structure on which it is sleeved by three circles before entering a third water tank with water temperature being 18 degrees to 22 degrees. When all these are done, the half-finished product is recollected by a coil recollection wheel. The production speed of the whole production line is controlled between 65m / min to 75m / min.

Description

technical field [0001] The invention relates to the technical field of optical cable manufacturing, in particular to a manufacturing process of a large excess length single-core bundle tube. Background technique [0002] The number of casing cores of the existing central pipe structure is generally 4 to 12 cores, the diameter of the casing is 2.4 to 3.0mm, and the excess length is controlled at 1.0 to 1.5‰. The central pipe of this structure is relatively simple to debug, and the water temperature is usually increased. Appropriate number of rim turns and take-up tension can meet the process requirements. This production process is already very common, and debugging is not difficult. However, the remaining length of the single-core large excess length tube requires 2.0-2.5‰. The existing production Process production is difficult, because the less the optical fiber is, the harder it is to make it bigger, and there are many comprehensive factors, such as water temperature, len...

AI Technical Summary

Problems solved by technology

[0002] The number of casing cores of the existing central tube structure is generally 4 to 12 cores, the diameter of the casing is 2.4 to 3.0mm, and the excess length is controlled at 1.0 to 1.5‰. The central tube of this structure is relatively simple to debug, and the water temperature is usually increased. Appropriate number of rim turns and take-up tension can meet the process requirements. This production process is already very common, and debugging is not difficult. However, the remaining length of the single-core large excess length tube requires 2.0 to 2.5‰. The existing production Process production is difficult, because the less the optical fiber is, the harder it is to make it bigger, and there are many comprehensive factors, such as water temperature, length, material, speed, etc. In general, if the equipment, technology and materials are missing, the target excess length cannot be achieved. Testing, with the diversity of user requirements and different uses, some users have special requirements. A single bundle tube type requires one optical fiber, and the tensile strain of the optical fiber must meet the user's requirements and meet the construction requirements. Pull requirements and long run pull requirements

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