"

                            ✅鸭脖网站app|最新下载✅㊣全球最大,最信誉的线上综合平台✅鸭脖网站app|最新下载✅千款游戏,砖石级服务,鸭脖网站app|最新下载,欢迎各界玩家加入体验!

                                                      "
                                                      Welcome toShanghai Jiukai Wire & Cable Co., Ltd.official website鸭脖网站app|最新下载鸭脖网站app|最新下载!
                                                      Message   |   Sitemap
                                                      tel Totline:021-57186991
                                                      tel Switchboard:0086-21-37100188
                                                      QR CODE
                                                      二维码
                                                    1. Home
                                                    2. Profile
                                                    3. Product
                                                    4. News
                                                    5. Honor
                                                    6. Message
                                                    7. Case
                                                    8. Recruitment
                                                    9. Contact
                                                    10. Shanghai Jiukai Wire & Cable Co., Ltd.
                                                    11. Language
                                                    12. Home
                                                    13. Comapny
                                                    14. Product
                                                    15. News
                                                    16. Honor
                                                    17. Recruitment
                                                    18. Case
                                                    19. Contact
                                                    20. Contact Us
                                                      TEL :
                                                      Tel1:
                                                      021-57186991

                                                      Tel2:
                                                      0086-21-37100188

                                                      Tel3:
                                                      0086-21-37100188
                                                      Industry news
                                                      Industry news
                                                      Industry news
                                                      Home Group Dynamics Industry news

                                                      Why is the wire and cable copper wire black?

                                                      Joca 2018-10-22 2519hit return

                                                      Why is the wire and cable copper wire black?

                                                      (1) The area of the wire drawing emulsified oil pool is small, the return pipe is short, and the sealing is caused, resulting in slow heat dissipation, resulting in high temperature of the emulsion oil.

                                                      (2) is caused by the annealing of copper wire. First, the cooling water that is continuously pulled back is generally made of tap water and ground water. Because the water quality varies from place to place, the water quality of some areas is lower, only 5.5~5.0 (normally 7.0~7.5), the original emulsion The anti-oxidation oil film is washed away, the annealed copper wire is easy to oxidize and blacken; the second is that the finished copper wire drawn by the ordinary wire drawing machine is annealed on another annealing line, and the cooling water does not use antioxidant, anti-oxidation time Short, and soon there will be oxidative blackening;

                                                      (3) Some old factories still use annealing cylinders to anneal. The following reasons may also cause oxidation and blackening: First, the annealing cylinder nut is not tightened, and after leaking carbon dioxide or high-purity nitrogen, the air is leaked; The temperature of the copper wire is too high, beyond 30 °C; the third is insufficient maintenance of the drawing emulsion, the pH value is too low; these conditions are more common when the summer temperature is high, the emulsion will be used when it is used continuously, and the temperature will be lost when the temperature is high. Faster, if the new crude oil is not replenished in time, the fat content is very small at this time, and the temperature of the emulsion may exceed 45 °C, which is likely to cause oxidation and blackening.

                                                      (4) In another case, because of the high speed drawing currently used, the speed is increased, the relative heat dissipation time is reduced, and the space and time are brought to the oxidation. Therefore, it is recommended that the manufacturer pay more attention to the fat content of the emulsion. In case of temperature, PH value, etc., the bacteria in the spring yellow mold rain season can be propagated faster, and the fungicide can be used. In the summer, antioxidants can be used to solve the problem of oxidation and blackening.

                                                       

                                                      Reasons: 1. The deformation of the finished mold is too small;

                                                      2. There is no seal on the periphery and front of the mold insert.

                                                      Solution: Add a rubber pad in the direction of the exit of the finished mold, and then screw the finished mold to solve the problem of oil leakage.

                                                      The deformation of the finished mold is too small, which is a common mistake. The single-mode deformation needs a minimum amount of deformation, and the generated pressure can be greater than the yield limit of the metal. Only plastic deformation can be achieved, the size can be stabilized, and the single-line surface is There will be light from the cold pull.



                                                      鸭脖网站app|最新下载