The lack of awareness of the effectiveness of hardware accessories door and window wall hardware accessories are recognized as lagging behind, but why no one to develop, some people believe that the hardware accessories are too thin, not worth the investment, in addition to invest too little can not do hardware, so over the years No one has a big investment, hardware accessories have also been extended to rely on foreign situations.
Mr. Li, who has been engaged in many years of hardware product operations, said in an interview with Jiuzheng Xiaobian: “The profit of hardware accessories is low, but the profits of high-grade products are not thin. We have studied that foreign hardware accessories account for foreign costs. 20% to 30% (excluding import duties) of new short-term hardware accessories even higher profits." More important thing is not to forget that China is a big country, China's annual needs of a large amount of amazing, such a large market, with the same level Hardware accessories are much cheaper than foreign ones. The overall benefit is not small, but rather impressive.
The lack of understanding of the use of functional hardware in China's doors and windows of hardware accessories has not changed in recent years, no new development, the market what companies buy what, most of the important projects use high-priced imported hardware accessories, foreign companies specializing in the study of various types of hardware accessories, Therefore, different types and different performances of hardware accessories emerge one after another. Our locks are generally two lock points, and foreign production of multi-point locks is divided into three, four, and six-point locks. Hardware accessories can improve door and window functions and can be made like cars. As the sliding door hardware accessories, because there are high-grade multi-functional accessories can have multi-function doors and windows.
Inadequate understanding of the safety of hardware accessories In 1999, a typhoon of 15 grades in Xiamen, tens of thousands of trees were blown down, poles, tower cranes were blown down, a number of glass curtain walls and aluminum windows were not boasted, and many sashes due to hardware The accessories are blown off if they are not secure. The sash has a multi-point lock on all four sides of the sash and it is not blown off. Due to the lack of attention to hardware accessories, the firmness and security of the curtain walls are reduced, the quality of doors and windows walls is directly affected, and personal safety is hidden. Therefore, special attention should be paid to the safety of hardware accessories.
The lack of attention to the surface decoration of the hardware is not part of the overall wall of the door and window walls, the beauty of the appearance is part of the important requirements of the curtain walls of windows and doors
Although there are many types of tapping screws, they all have the following similarities:
(1) are generally made of carbonized carbon steel (accounting for 99% of total production). It can also be made of stainless steel or non-ferrous metals.
(2) The product must be heat treated. Carbon steel tapping screws must be carbonized and stainless steel tapping screws must be solution hardened. In order to make tapping screws to meet the requirements of the standard of mechanical properties and performance.
(3) The product surface hardness is high, the core toughness is good. That is, "soft inside strong outside". This is a major feature of tapping Screw performance requirements. If the surface hardness is low, it can not be screwed into the matrix; If the core toughness is poor, a twist will break, can not be used. So "inside soft outside steel" is self-tapping screw to meet the use of performance, very important requirements.
(4) The surface of the product needs surface protection treatment, generally electroplating treatment. Some product surface must be treated by phosphate (photostatting), such as wall panel self - tapping screws for photostatting.
(5) Production by cold heading process. It is recommended to use high-speed cold heading machine and high-speed wire rolling machine or high-speed planetary wire rolling machine. High speed is emphasized here to ensure product quality. Only the head of tapping screw produced by high-speed machine is well formed and the thread quality is high.
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