Bathroom hardware is generally divided into three components: the base (fixed parts), connectors, and functional parts. One side of the base is close to the wall or board surface. This surface is generally not surface treated. You only need to look at its color to basically know what kind of material is used. The connection part is basically surface treated. Only the methods that will be introduced to you will be used. Most of the functional parts are mainly tubular and rod-shaped raw materials. If the tubular material, its inner wall can generally be seen. Because of the different proportions of raw materials, the weight of objects with the same size is different (except light materials). At present, the bathroom hardware pendants on the market mainly include the following materials:
First, stainless steel (now relatively few products on the market).
Advantages: Not afraid of wear, no rust.
Disadvantages: single style, general workmanship.
Second, copper chrome plating (now on the market basically based on such products, the rod is divided into hollow, solid two, electroplating is divided into light, frosted two).
1, hollow copper chrome plating (mostly round bar, coarse square bar also generally)
Advantages: Many styles and affordable prices.
Disadvantages: fear of wear and tear, the best plating in the wet environment will also fall off all year round, some small manufacturers in order to keep prices down, the plating layer is very thin, will not take long to electroplating will fall off. Deformable, regular manufacturers generally do not have this problem, but some manufacturers use the tube to see a relatively thick, but the wall is very thin, use it is broken (recommended to buy a hard pressure, easy to bend should not be purchased) .
2, full copper solid chrome (usually square tube, and some to prove it is solid, specifically twisted a few flowers at both ends of the rod):
Advantages: Fine workmanship, relatively thick plating layer, strong and durable.
Disadvantages: The price is high, the style is not as hollow.
Third, aluminum alloy (or aluminum-magnesium alloy).
Advantages: not afraid of wear, lightweight and durable.
Disadvantages: It may take time to spend a long time.
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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