Spring is a symbol of the beginning of the new season, warm spring flowers blooming, but it is also the season of flying catkins, but also high incidence of allergic symptoms. Allergens caused by catkins mainly occur in the upper respiratory tract. When catkins are inhaled into the nasal cavity, they can cause intense irritation, runny nose, cough, asthma and other reactions. Allergic reactions, such as itching of the skin and reddening of the conjunctiva of the eye, can also occur on the skin. Severe sleep can also be affected. Nasty allergens not only have catkins, and are prone to respiratory diseases and allergies in the spring. To solve these problems, you may wish to add an air purifier to your home. This type of product can not only effectively eliminate harmful substances in the air, but also can effectively eliminate harmful substances in the air. Disinfect allergens. However, conventional air purifiers occupy a lot of space and are not easy to use. In order to solve this problem, Ding Shanmei Purified Ceiling has launched an integrated air purifier for ceilings. It integrates perfectly with integrated ceilings and does not take up a bit of room space. Friends who are suffering from allergies may wish to try.
Top Shanmei Purifying Ceiling - A New Type of Purifier for Integrated Ceiling This Purifier adopts three kinds of purification devices: activated carbon, cold catalyst and negative ion, which can effectively remove the formaldehyde and benzene generated during the decoration process, and can effectively remove dust, pollen, bacteria, etc. Contaminants are good products for regulating the family environment.
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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