Natural, rural, modern, and classical, these four styles of carpets have always been popular. The natural style is represented by wool carpets, horizontal piles, cut piles, loop piles, and various weave wool carpets, which can make people feel a natural taste.
Recently popular is the pure natural wool carpet, each of which is the natural color of wool, which will naturally reach its full potential.
The rustic style is mostly a strong wool or sisal carpet, and the creativity comes from nature.
Bold curling effects and exquisite geometric figures are common elements of modern rugs. Modern style carpets break the traditional way of processing, do not deliberately express the main body, but with the abstract pattern, large-area color blocks, give the strongest impact on the line of sight. The classic-style rugs continue with classical patterns, and the quaint elegance reveals elegance and elegance, complementing the elegant nostalgic vintage furniture.
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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