A 35kv molded joint injection molding material and its manufacturing process
A molding and base material technology, which is applied in the field of 35kV injection molding joint injection molding materials and manufacturing technology, can solve the problems affecting the production progress of injection molding joints, restricting the application of cable repair projects, and poor flatness, so as to improve the machinability performance, improved work efficiency, and reduced processing time
Active Publication Date: 2020-01-17
DANDONG ELECTRIC POWER SUPPLY COMPANY OF STATE GRID LIAONING ELECTRIC POWER SUPPLY +1
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- Description
- Claims
- Application Information
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Problems solved by technology
[0003] However, the traditional cross-linked polyethylene insulating material has a small number of pits and pits after entering the injection mold through the machine head, and the flatness is poor. It requires cumbersome surface treatment such as scraping, rough grinding, and fine grinding in the later stage, which takes a long time and affects the injection molding. The production progress of the type joint limits the application in the cable repair project
Method used
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Embodiment 1
[0022] The raw materials include by weight: 200 parts of low-density polyethylene insulating base material, 2 parts of tetrafluoroethylene-perfluoro(alkyl vinyl) ether copolymer, 2 parts of ethylene-acrylic acid copolymer, 3 parts of accelerator, antioxidant 0.5 parts and 2 parts of initiator.
[0023] A manufacturing process of injection molding materials for 35kV injection molded joints, the specific steps include:
[0024] Production of tetrafluoroethylene-perfluoro(alkyl vinyl) ether copolymer masterbatch: Blend 2 parts of tetrafluoroethylene-perfluoro(alkyl vinyl) ether copolymer and 100 parts of low-density polyethylene insulating base material evenly , using a twin-screw extruder to melt-extrude tetrafluoroethylene-perfluoro(alkyl vinyl)ether copolymer masterbatches. During the extrusion process, tetrafluoroethylene-perfluoro(alkyl vinyl)ether copolymers are first attached to The inner surface of the machine head, when the low-density polyethylene insulating base mater...
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The invention discloses an injection molding material of a 35kV mold injection type connector. The injection molding material is prepared from the following raw materials in parts by weight: 100 to 300 parts of a low-density polyethylene insulating base material, 1 to 3 parts of a tetrafluoroethylene-perfluor(alkyl vinyl)ether copolymer, 0.1 to 5 parts of an ethylene-acrylic acid copolymer, 0.1 to 5 parts of an accelerant, 0.4 to 0.6 part of an antioxidant and 1 to 3 parts of an initiator. With the adoption of the manner, the injection molding material of the 35kV mold injection type connector and a manufacturing process have the advantages that the injection molding material not only has the effect of improving the electric performance of a product and realizing water-tree-resisting and anti-ageing functions, but also has the effects of improving the machinability, reducing the subsequent surface treatment time and improving the working efficiency.
Description
technical field [0001] The invention belongs to the field of cross-linked polyethylene insulated cable intermediate joints, and in particular relates to a 35kV injection molded joint injection molding material and a manufacturing process. Background technique [0002] XLPE insulated cables have been widely used in urban power transmission networks and offshore wind power fields due to their excellent electrical properties, heat resistance, mechanical properties, simple manufacturing process, light weight and easy laying and maintenance. The main forms of high-voltage accessories for XLPE insulated cables are: wrapped type, combined prefabricated type, integral prefabricated type, tape-molded type and injection-molded joint. Advanced cable body recovery technology, cross-linking vulcanization control technology eliminates the insulation interface, and becomes a continuous equivalent electric field shield with the original cable, eliminating space charge accumulation and elect...
Claims
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IPC IPC(8): C08L23/06C08L27/18C08L23/08C08K5/3492C08J3/22
CPCC08J3/226C08J2323/06C08J2423/06C08L23/06C08L2201/08C08L2203/202C08L2205/03C08L2207/066C08L2312/00C08L27/18C08L23/0869C08K5/34924
Inventor 叶丽军狄健周雨田于鑫钱志康汤国良
Owner DANDONG ELECTRIC POWER SUPPLY COMPANY OF STATE GRID LIAONING ELECTRIC POWER SUPPLY