Production process for manufacturing optical assembly influenced by low-temperature environment

Abstract

The invention discloses a production process for manufacturing an optical assembly influenced by a low-temperature environment, which comprises the following steps: melting and drawing: melting and drawing a preform rod at 2200-2300 DEG C through an electric heating furnace; optical fiber annealing: annealing the drawn optical fiber; cooling the optical fiber, cooling and shaping the drawn optical fiber through an optical fiber cooling device, and further cooling through a cooling pipe; optical fiber coating: conveying the resin into a coating machine, and coating the resin on the outer surface of the optical fiber by the coating machine; optical fiber curing: curing the optical fiber coated with the resin through ultraviolet curing equipment to form a coating layer; 2, sheath manufacturing: stirring and mixing TPEE and a flexibilizer, conveying the mixture to a twin-screw extruder for extrusion and granulation, and extruding the extruded and granulated particles into a sheath through an extruder; and sheath cooling: cooling the sheath through a cooling water tank. According to the invention, the processing raw material PVE material of the sheath is replaced by the TPEE and the flexibilizer, and extrusion molding is carried out, so that the wear resistance and low temperature resistance of the sheath can be greatly improved.

Description

Technical Field

[0001] The invention relates to the technical field of optical fiber production, and in particular to a production process for manufacturing low-temperature environment-affected optical components. Background Art

[0002] Optical fiber is short for optical fiber, which is a fiber made of glass or plastic that can be used as a light transmission tool. The transmission principle is total reflection of light.

[0003] With the development of the 5G market, the development of the optical communication industry is also becoming more and more rapid. Different optical cable product structures and requirements are emerging in an endless stream, especially the core optical fiber protection material of the optical cable. There are also many requirements for the loose tube performance of the optical cable, especially in extremely cold areas. Ordinary loose tubes are prone to pre-cooling brittle cracking or fracture. The materials used in cold areas (such as Siberia in winter and the North and South Poles) must be selected to adapt to the cold environment. Low temperature causes the yield strength of the material to increase sharply. At a certain temperature, it is equal to the fracture strength. This temperature is the ductile-brittle transition temperature. If the temperature continues to drop, the yield strength continues to increase and is greater than the fracture strength. Therefore, the material has already undergone brittle fracture at low temperatures without plastic deformation. Summary of the invention

[0004] The object of the present invention is to provide a production process for manufacturing a low-temperature environment-affected optical component, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above object, the present invention provides the following technical solution: a production process for manufacturing a low temperature environment-affected light component, comprising the following steps:

[0006] Step S1: Melting and drawing: the preform rod is melted and drawn at 2200° C.-2300° C. in an electric heating furnace;

[0007] Step S2: annealing the optical fiber, annealing the drawn optical fiber;

[0008] Step S3: cooling the optical fiber, first cooling the drawn optical fiber through an optical fiber cooling device to shape it, and then further cooling it through a cooling tube;

[0009] Step S4: optical fiber coating, the resin is transported to a coating machine, and the coating machine coats the resin onto the outer surface of the optical fiber;

[0010] Step S5: curing the optical fiber, curing the optical fiber coated with resin by ultraviolet curing equipment to form a coating layer;

[0011] Step S6: Sheath production, TPEE and toughening agent are stirred and mixed and then conveyed to a twin-screw extruder for extrusion granulation, and the extruded granulated particles are extruded into a sheath through an extruder;

[0012] Step S7: Sheath cooling, where the sheath is cooled by passing through a cooling water tank;

[0013] Step S8: Cable stranding, where the sheath and the optical fibers are assembled.

[0014] Preferably, the toughening agent is a mixture of SBS and ABS; the mass ratio of TPEE to the toughening agent is TPEE:toughening agent = 70%-80%:20%-30%, and in the toughening agent, by mass ratio, SBS:ABS = 65-75:25-35.

[0015] Preferably, the steps of the sheath production in step S6 are as follows:

[0016] S61: Select TPEE and the toughening agent according to the mass ratio, crush the TPEE and the toughening agent, and after crushing, the TPEE and the toughening agent are respectively transported through two conveying pipelines to a high-speed mixing and kneading mixer for high-speed stirring and mixing;

[0017] S62: After being mixed by the high-speed mixer, it is transported to a twin-screw extruder for extrusion granulation;

[0018] S63: The granules obtained by extrusion granulation are extruded into a sheath structure through an extruder.

[0019] Preferably, in step S1, melting and drawing: The preform is heated to 2200°C - 2300°C in an electric heating furnace, and then drawn by a traction method. At the same time, the outer diameter of the optical fiber is detected by a laser diameter gauge, and the diameter of the optical fiber is maintained at 125 microns by controlling the drawing speed.

[0020] Preferably, in step S3, optical fiber cooling: The temperature in the room is lowered by a cold air blower to cool the optical fiber, so as to perform the subsequent coating.

[0021] Preferably, after the optical fiber is cooled, the optical fiber is ground:

[0022] Primary grinding: After the optical fiber is drawn, the optical fiber is pushed to move to the right, and the outer wall of the drawn optical fiber is ground by swinging left and right through an annular grinding cavity;

[0023] Secondary grinding: The outer wall of the drawn optical fiber is secondarily ground by rotating the grinding ring;

[0024] Outer wall cleaning: The grinding debris on the outer wall of the ground optical fiber is cleaned by rotating the cleaning device.

[0025] Preferably, step S4, optical fiber coating and step S5, optical fiber curing include:

[0026] Primary coating process: The resin is transported to the coater through a resin feeding system, and the coater coats the resin on the outer surface of the optical fiber;

[0027] Primary curing process: The fiber optic cable coated with resin is cured by an ultraviolet curing device to form a primary coating layer.

[0028] Secondary coating process: The resin is transported to a coater through a resin feeding system, and the coater coats the resin on the outer surface of the primary coating layer.

[0029] Secondary curing process: The fiber optic cable coated with resin is cured by an ultraviolet curing device to form a secondary coating layer.

[0030] Preferably, for the fiber optic cable coating: The liquid resin is applied to the fiber optic cable through a coater, and the process is repeated twice so that the surface of the fiber optic cable is evenly coated with resin.

[0031] Compared with the prior art, the beneficial effects of the present invention are:

[0032] By replacing the processing raw material PVE material of the sheath with TPEE and a toughening agent and performing extrusion molding, the wear resistance and low-temperature resistance of the sheath can be greatly improved. At the same time, the obtained secondary coating material for fiber optic cables has good performance through testing and fully meets the performance requirements of various aspects of the secondary coating material for optical cables. Description of the Drawings

[0033] Figure 1 It is a schematic flow chart of the present invention;

[0034] Figure 2 It is a schematic flow chart of the sheath manufacturing process of the present invention. Detailed Embodiments

[0035] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0036] Please refer to Figure 1 , the present invention provides a technical solution: a production process for manufacturing optical components affected by low-temperature environments, including the following steps:

[0037] Step S1: Melting and drawing, melting and drawing the preform through an electric heating furnace at 2200°C - 2300°C;

[0038] Step S2: Fiber optic cable annealing, annealing the drawn fiber optic cable;

[0039] Step S3: Fiber optic cable cooling, first cooling and shaping the drawn fiber optic cable through a fiber optic cable cooling device, and then further cooling it through a cooling pipe;

[0040] Step S4: Optical fiber coating. The resin is transported into a coater, and the coater coats the resin on the outer surface of the optical fiber.

[0041] Step S5: Optical fiber curing. The optical fiber coated with resin is cured by an ultraviolet curing device to form a coating layer.

[0042] Step S6: Sheath production. TPEE and a toughening agent are stirred and mixed and then transported to a twin-screw extruder for extrusion granulation. The extruded and granulated particles are extruded into a sheath by an extruder.

[0043] Step S7: Sheath cooling. The sheath is cooled by passing through a cooling water tank.

[0044] Step S8: Cable laying. The sheath and the optical fiber are assembled.

[0045] In the present invention, the toughening agent is a mixture of SBS and ABS; the mass ratio of TPEE to the toughening agent is TPEE:toughening agent = 70%-80%:20%-30%. In the toughening agent, by mass ratio, SBS:ABS = 65-75:25-35.

[0046] Please refer to Figure 2 , in the present invention, the steps of the sheath production in Step S6 are as follows:

[0047] S61: Select TPEE and the toughening agent according to the mass ratio, crush the TPEE and the toughening agent, and the crushed TPEE and toughening agent are respectively transported to a high-speed mixing and stirring machine through two conveying pipelines for high-speed stirring and mixing.

[0048] S62: After being mixed by the high-speed mixer, it is transported to a twin-screw extruder for extrusion granulation.

[0049] S63: The extruded and granulated particles are extruded into a sheath structure by an extruder.

[0050] In the present invention, in Step S1, melting and drawing: The preform is heated to 2200°C - 2300°C by an electric heating furnace, and then drawn by a traction method. At the same time, the outer diameter of the optical fiber is detected by a laser diameter gauge, and the diameter of the optical fiber is maintained at 125 microns by controlling the drawing speed.

[0051] In the present invention, in Step S3, optical fiber cooling: The temperature in the room is reduced by a cold air blower to cool the optical fiber, so as to perform subsequent coating.

[0052] In the present invention, after the optical fiber is cooled, the optical fiber is ground:

[0053] Primary grinding: After the optical fiber is drawn, the optical fiber is pushed to move to the right, and the outer wall of the drawn optical fiber is ground by swinging left and right in an annular grinding cavity.

[0054] Secondary grinding: The outer wall of the drawn optical fiber is subjected to secondary grinding by rotating the grinding ring;

[0055] Outer wall cleaning: The grinding debris on the outer wall of the ground optical fiber is cleaned by rotating the cleaning device.

[0056] In the present invention, the step S4 optical fiber coating and the step S5 optical fiber curing include:

[0057] Primary coating process: The resin is transported to the coater by the resin feeding system, and the coater coats the resin on the outer surface of the optical fiber;

[0058] Primary curing process: The optical fiber coated with resin is cured by an ultraviolet curing device to form a primary coating layer;

[0059] Secondary coating process: The resin is transported to the coater by the resin feeding system, and the coater coats the resin on the outer surface of the primary coating layer;

[0060] Secondary curing process: The optical fiber coated with resin is cured by an ultraviolet curing device to form a secondary coating layer.

[0061] In the present invention, the optical fiber coating: The liquid resin is coated on the optical fiber by a coater, and the process is repeated twice so that the surface of the optical fiber is evenly coated with resin.

[0062] The present invention: The preform is heated to 2200°C - 2300°C by an electric heating furnace, and then drawn by a traction method. At the same time, the outer diameter of the optical fiber is detected by a laser diameter gauge, and the diameter of the optical fiber is maintained at 125 microns by controlling the drawing speed; the drawn optical fiber is annealed; the temperature in the room is reduced by a cold air blower to cool the optical fiber, so as to perform subsequent coating; for optical fiber coating, the resin is transported to the coater, and the coater coats the resin on the outer surface of the optical fiber; the optical fiber coated with resin is cured by an ultraviolet curing device to form a coating layer; TPEE and a toughening agent are selected according to the mass ratio, and the TPEE and the toughening agent are pulverized. After pulverization, the TPEE and the toughening agent are respectively transported to a high-speed mixing and stirring machine through two conveying pipelines for high-speed stirring and mixing; after being mixed by the high-speed mixer, it is transported to a twin-screw extruder for extrusion granulation; the extruded granules are extruded into a sheath structure by an extruder; the sheath is cooled, and the sheath is cooled by a cooling water tank; the sheath and the optical fiber are assembled.

[0063] The content not detailedly described in this specification belongs to the prior art well-known to those skilled in the art. Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A production process for manufacturing a low temperature environment-affected light component, characterized in that: The following steps are involved: Step S1: Melting and drawing: the preform rod is melted and drawn at 2200° C.-2300° C. in an electric heating furnace; Step S2: annealing the optical fiber, annealing the drawn optical fiber; Step S3: cooling the optical fiber, first cooling the drawn optical fiber through an optical fiber cooling device to shape it, and then further cooling it through a cooling tube; Step S4: optical fiber coating, the resin is transported to a coating machine, and the coating machine coats the resin onto the outer surface of the optical fiber; Step S5: curing the optical fiber, curing the optical fiber coated with resin by ultraviolet curing equipment to form a coating layer; Step S6: Sheath production, TPEE and toughening agent are stirred and mixed and then conveyed to a twin-screw extruder for extrusion granulation, and the extruded granulated particles are extruded into a sheath through an extruder; Step S7: cooling the jacket, passing the jacket through a cooling water tank for cooling; Step S8: Cabling, assembling the sheath and the optical fiber.

2. The production process for manufacturing low temperature environment-affecting light components according to claim 1, characterized in that: The toughening agent is a mixture of SBS and ABS; the mass ratio of TPEE to toughening agent is TPEE: toughening agent = 70%-80%: 20%-30%, and in the toughening agent, the mass ratio of SBS: ABS is 65-75: 25-35.

3. The production process for manufacturing low temperature environment-affecting light components according to claim 1, characterized in that: The steps of making the sheath in step S6 are as follows: S61: TPEE and toughening agent are selected according to the mass ratio, and the TPEE and toughening agent are crushed. The crushed TPEE and toughening agent are respectively transported to a high-speed mixing mixer through two conveying pipes for high-speed mixing and mixing; S62: After being mixed in a high-speed mixer, the mixture is transported to a twin-screw extruder for extrusion and granulation; S63: The extruded granules are extruded into a sheath structure through an extruder.

4. The production process for manufacturing low temperature environment-affecting light components according to claim 1, characterized in that: The step S1 is melt drawing: the preform rod is heated to 2200° C.-2300° C. by an electric heating furnace, and then drawn by traction, while the outer diameter of the optical fiber is detected by a laser diameter meter, and the diameter of the optical fiber is maintained at 125 μm by controlling the drawing speed.

5. The production process for manufacturing low temperature environment-affecting light components according to claim 1, characterized in that: The step S3 of optical fiber cooling is to lower the temperature in the room by means of a cooling fan so as to cool the optical fiber and perform subsequent coating.

6. The production process for manufacturing low temperature environment-affecting light components according to claim 1, characterized in that: After the optical fiber is cooled, the optical fiber is ground: Primary grinding: After the optical fiber is drawn, the optical fiber is pushed to the right, and the outer wall of the drawn optical fiber is ground by swinging the annular grinding chamber left and right; Secondary grinding: The outer wall of the drawn optical fiber is secondarily ground by rotating the grinding ring; Outer wall cleaning: The cleaning device is rotated to clean the grinding debris on the outer wall of the polished optical fiber.

7. The production process for manufacturing low temperature environment-affecting light components according to claim 1, characterized in that: The step S4 of optical fiber coating and the step S5 of optical fiber curing include: Primary coating process: The resin is delivered to the coating machine through the resin feeding system, and the coating machine coats the resin on the outer surface of the optical fiber; Primary curing process: The optical fiber coated with resin is cured by ultraviolet light curing equipment to form a primary coating layer; Secondary coating process: The resin is delivered to the coating machine through the resin feeding system, and the coating machine coats the resin to the outer surface of the primary coating layer; Secondary curing process: The resin-coated optical fiber is cured by ultraviolet light curing equipment to form a secondary coating layer.

8. The production process for manufacturing low temperature environment-affecting light components according to claim 1, characterized in that: The optical fiber coating: liquid resin is coated on the optical fiber by a coating machine, and this is repeated twice so that the surface of the optical fiber is evenly coated with the resin.

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