Summer decoration to prevent material problems
Summer decoration will have some impact on construction. Many people will pay more attention to the problems that need to be adjusted in construction. However, many people will also ignore the pre- and post-construction links. In fact, the summer decoration has to consider the effect of high temperature and rainy weather when purchasing materials. Summer construction site materials also need to pay more attention.
Problems to pay attention to when purchasing materials1, the nearer the production date of the board, the better
The moisture content of wood can affect the quality of construction. When purchasing artificial boards such as blockboards, try to select the production date closer to the nearest one. The moisture content of such boards is similar to that of the interior, and it is appropriate to use them.
2, wooden keel election stable
The stability of wood keel with low moisture content is relatively strong. When selecting wood keel materials, it is better to choose a longer time for processing. Such excipients have a low moisture content and are not susceptible to mildew.
3, do not buy cement on rainy days
If the cement cakes, it will fail. The cement is very susceptible to moisture, and even if it is only a small amount of moisture, it will quickly clump, which will seriously affect the quality or even become obsolete, so the cement should not be purchased on rainy days.
4, when buying doors and windows to have room for size
The high temperature in the summer will affect thermal expansion and contraction of plastic-steel materials. Therefore, when ordering plastic steel doors and windows and sliding doors, the dimensions should be slightly surplus. Because plastic steel materials are greatly affected by the temperature, if the size of the steel is too compact, there will be gaps and deformations due to lower temperatures in the winter.
Be careful with the material on site
1, in the shade
Summer temperatures are high, and the weather is dry. The materials at the construction site should be placed in a cool place as much as possible, and keep a certain distance from the live tools to reduce the risk of accidents.
Decoration construction knowledge construction installation
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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