More than 30 years of research and development of high quality electric cables
21
2020-09
Introduction to the Functions of Key Parts of the Extruder
1、 Screw
The screw is one of the key components in the extruder. The screw not only plays a role in conveying materials, but also plays an extremely important role in the difficulty of material extrusion and molding. Therefore, reasonable selection of screws can achieve ideal quality and output. The screw of the extruder and the screw of the rubber extruder are similar in principle. But the requirements for the extruder screw are stricter than those for the rubber extruder.
Click to see more →
21
2020-09
Basic Principles of Plastic Extrusion
The main insulation material and protective layer material of plastic wires and cables is plastic. Thermoplastics have superior performance and excellent processing performance, especially in the production of extruded insulation and protective layers for wires and cables, where the process is simple. The basic method of producing plastic insulation and protective layers for wires and cables is to use a single screw extruder for continuous extrusion. Due to the continuous extrusion characteristic of the extruder, the production process of plastic insulation and sheath is also continuous. In terms of wire and cable production, differences in product specifications and extrusion components often determine certain changes in extrusion equipment and process parameters. However, overall, the extrusion coating process for various products and components is similar and slightly different. Below, the extrusion principle, process, and mold type will be introduced with general principles as the main focus and individual examples as auxiliary.
Click to see more →
16
2020-09
China Construction Power Construction Co., Ltd. said on the 13th that the No. 1 project of Inner Mongolia Dalat Banner Photovoltaic Power Generation Leading Award Base undertaken by its subsidiary China Construction Zhonghuan Engineering Co., Ltd. was successfully completed. This means that the world's largest desert centralized photovoltaic power generation base is about to be connected to the grid for power generation.
Click to see more →
13
2020-09
Classification of our standard standards
According to the standardization object, the standard is usually divided into three categories: technical standards, management standards and work standards.
Technical standards – standards developed for technical matters in the field of standardization that need to be harmonized. Including basic standards, product standards, process standards, testing and test method standards, and safety, health, environmental protection standards, etc.
Management standards - standards for management matters that need to be harmonized in the field of standardization.
Work standards - the standards formulated for the responsibilities, rights, scope, quality requirements, procedures, effects, inspection methods, and assessment methods of work.
Click to see more →
10
2020-09
Distinguishing plastic methods
Distinguishing plastic methods
LDPE (Chinese name: Low Density High Pressure Polyethylene):
Sensory identification: Soft to the touch: White and transparent, but with average transparency, often with adhesive tape and printed words. (Note: Tape and printed words are inevitable, but their content must be controlled as these will affect prices in the market)
Combustion identification: The combustion flame is yellow above and blue below; When burning, there is no smoke, a smell of paraffin, melting and dripping, and easy to wire.
Click to see more →
08
2020-09
Analyze the development trend of China's cable industry transformation and upgrading
In recent years, China's economic development has entered the New Normal. Under the background of accelerated integration of industrialization and industrialization, industry 4.0, and "Internet plus", the wire and cable industry must seize the opportunity to speed up the strengthening of muscles and bones, and accelerate transformation and upgrading. The Internet is penetrating from the consumer goods industry to the fields of equipment manufacturing, energy, new materials, and other industries, comprehensively promoting the transformation of traditional industrial production methods. In this regard, wire and cable enterprises must seize this opportunity, accelerate transformation and upgrading, and enhance the world level of Chinese manufacturing.
Click to see more →
07
2020-09
South Korea to Build the World's Largest Floating Offshore Wind Power Project
Recently, it was reported that oil and gas giants Total and Maghrey Green Investment Group will establish a joint venture company with a 50 to 50 equity ratio to develop five floating offshore wind farms in the waters near Ulsan and Jeollanamdo provinces in eastern and southern South Korea, with a total installed capacity of 2GW. This will be the world's largest floating offshore wind power project under planning.
Click to see more →
31
2020-08
Classification and Common Product and Material Standards for Wire and Cable Inspection
1. Classification of test types
(1) Type test (symbol T): According to general commercial principles, a test is conducted on a type of cable specified in the standard before supply to prove that the cable has good performance and can meet the specified usage requirements. The essence of type testing is that once these tests are conducted, there is no need to repeat them. If changing the cable material or design will affect the performance of the cable, it must be repeated.
(2) Sampling test (symbol S): Conduct tests on finished cable samples or on components taken from finished cables to prove that the finished cable product meets the design specifications.
(3) Routine test (symbol R): refers to the test that must be carried out before the finished cable leaves the factory. It should be carried out 100%.
Click to see more →
25
2020-08
What are fire-resistant cables and what standards are used for classification
In China, ordinary fire-resistant cables are divided into Class A and Class B: Class B cables can withstand combustion for at least 90 minutes under a flame and rated voltage of 750 ℃ to 800 ℃ without being broken down (i.e., the 3A fuse does not blow)
Click to see more →
17
2020-07
Causes of copper wire blackening
The reasons for the blackening of copper wires compiled by the editor:
1. The area of the drawing emulsion oil pool is small, the return pipeline is short, and it is sealed, resulting in slow heat dissipation and high emulsion oil temperature.
2. It is caused by copper wire annealing.
① The cooling water used for continuous cooling is usually tap water and groundwater. Due to the varying water quality in different regions, the pH value of water in some areas is low, only 5.5-5.0 (normally 7.0-7.5). The antioxidant oil film in the original emulsion has been cleaned, and the annealed copper wire is prone to oxidation and blackening;
② The finished copper wire drawn by an ordinary wire drawing machine is annealed on another annealing line, and the cooling water does not use antioxidants. The oxidation resistance time is short, and oxidation and blackening phenomenon will soon occur;
Click to see more →
TEl：
Cases：
More than 30 years focus on high quality cable development and manufacturing
Address：
Guantun Village, Shaha Subdistrict, Sujiatun District, Shenyang City
Copyright shenyang electric power cable factory. All rights reserved
Note: some of the materials are from the Internet, if you have any questions, please contact us