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Optical Fiber Cable Production Process

BY Hunan GL Technology Co.,Ltd.

POST ON:2023-01-13

VIEWS 403 Times


In the production process, the technological process of optical cable production can be divided into: coloring process, optical fiber two sets of process, cable forming process, sheathing process. The optical cable manufacturer of Changguang Communication Technology Jiangsu Co., Ltd. will introduce the process of optical cable production in detail below:

1. Optical fiber coloring process

The purpose of the coloring process production line is to color the optical fiber with bright, smooth, stable and reliable colors, so that it can be easily identified during the production and use of the optical cable. The main raw materials used in the coloring process are optical fibers and coloring inks, and the colors of the coloring inks are divided into 12 types according to industry standards. The chromatogram arrangement order stipulated by the radio and television industry standard and the Ministry of Information Industry standard is different. The chromatogram arrangement of the radio and television standard is as follows: white (white), red, yellow, green, gray, black, blue, orange, brown, purple, pink, Green: The industry standard chromatographic arrangement of the Ministry of Information Industry is as follows: blue, orange, green, brown, gray, original (white), red, black, yellow, purple, pink, and green. The use of natural colors instead of white is permitted provided that identification is not affected. The chromatographic arrangement adopted in this book is carried out according to the radio and television standard, and it can also be arranged according to the standard chromatographic arrangement of the Ministry of Information Industry when required by customers. When the number of fibers in each tube is more than 12 cores, different colors can be used to distinguish the fibers according to different proportions.

The optical fiber should meet the requirements of the following aspects after coloring:
a. The color of the colored optical fiber does not migrate and does not fade (the same is true for wiping with methyl ethyl ketone or alcohol).
b. The optical fiber cable is neat and smooth, not messy or crimped.
c. The fiber attenuation index meets the requirements, and the OTDR test curve has no steps.

The equipment used in the optical fiber coloring process is an optical fiber coloring machine. The optical fiber coloring machine is composed of optical fiber pay-off, coloring mold and ink supply system, ultraviolet curing furnace, traction, optical fiber take-up and electrical control. The main principle is that the UV-curable ink is coated on the surface of the optical fiber through a coloring mold, and then fixed on the surface of the optical fiber after being cured by an ultraviolet curing oven to form an optical fiber that is easy to separate colors. The ink used is UV curable ink.

2. Two sets of optical fiber technology

The secondary coating process of optical fiber is to select suitable polymer materials, adopt the method of extrusion, and under reasonable process conditions, put a suitable loose tube on the optical fiber, and at the same time, fill a chemical compound between the tube and the optical fiber. Long-term stable physical properties, suitable viscosity, excellent waterproof performance, good long-term protection performance for optical fibers, and fully compatible with the sleeve material Special ointment for optical fibers.

The two sets of processes are the key processes in the optical cable process, and the points that need to be paid attention to are:

a. Fiber excess length;
b. The outer diameter of the loose tube;
c. The wall thickness of the loose tube;
d. The fullness of the oil in the tube;
e. For the color separation beam tube, the color should be bright and consistent, and it is easy to separate colors.

The equipment used in the optical fiber secondary coating process is the optical fiber secondary coating machine. Sink, drying device, on-line caliper, belt traction, wire storage device, double-disc take-up and electrical control system, etc.

3. Cabling process

The cabling process, also known as the stranding process, is an important process in the manufacturing process of optical cables. The purpose of cabling is to increase the flexibility and bendability of the optical cable, improve the tensile capacity of the optical cable and improve the temperature characteristics of the optical cable, and at the same time produce optical cables with different numbers of cores by combining different numbers of loose tubes.

The process indicators mainly controlled by the cabling process are:

1. Cable pitch.
2. Yarn pitch, yarn tension.
3. Pay-off and take-up tension.

The equipment used in the cabling process is an optical cable cabling machine, which is composed of a reinforcing member pay-off device, a bundle tube pay-off device, an SZ twisting table, a positive and negative yarn binding device, a double-wheel traction, a lead wire and an electrical control system.

4. Sheath process

According to different use environments and laying conditions of the optical cable, different sheaths need to be added to the cable core to meet the mechanical protection of the optical fiber under different conditions. As a protective layer for optical cables against various special and complex environments, the optical cable sheath must have excellent mechanical properties, environmental resistance, and chemical corrosion resistance.

Mechanical performance means that the optical cable must be stretched, laterally pressed, impacted, twisted, repeatedly bent, and bent by various mechanical external forces during laying and use. The optical cable sheath must be able to withstand these external forces.

Environmental resistance means that the optical cable must be able to withstand the normal external radiation, temperature changes, and moisture erosion from the outside during its service life.

Chemical corrosion resistance refers to the ability of the optical cable sheath to withstand the corrosion of acid, alkali, oil, etc. in a special environment. For special properties such as flame retardancy, special plastic sheaths must be used to ensure performance.

The process indicators to be controlled by the sheath process are:

1. The gap between steel, aluminum strip and cable core is reasonable.
2. The overlapping width of steel and aluminum strips meets the requirements.
3. The thickness of the PE sheath meets the process requirements.
4. The printing is clear and complete, and the meter standard is accurate.
5. The receiving and arranging lines are neat and smooth.

The equipment used in the sheath process is an optical cable sheath extruder, which consists of a cable core pay-off device, a steel wire pay-off device, a steel (aluminum) longitudinal wrap belt embossing device, an ointment filling device, and a feeding and drying device. , 90 extrusion host, cooling water tank, belt traction, gantry take-up device and electrical control system and other components.

The above is the basic knowledge about the production process of communication optical cable introduced by our company's professional technicians to you. I hope it can be helpful to you. GL is a professional manufacturer of ADSS optical cable, OPGW optical cable, indoor and outdoor optical cable and special optical cable. The company is committed to the research and development, production and sales of optical communication technology products. Welcome new and old customers to come to consult and purchase.

 

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