System insulation means that a single insulation material is combined with other auxiliary materials to form a system called system insulation material. The existing system insulation materials are as follows:

1. External thermal insulation system: foamed polystyrene board (or extruded polystyrene board) + alkali-resistant glass fiber mesh + polymer mortar containing adhesive, such as special exterior wall insulation system, Beijing Zhongjianyuan exterior insulation system, Preswitt insulation system, etc.;

Items to be tested for the external insulation system:

A, heat transfer coefficient:

The thermal insulation effect of the system insulation material and the main structure is changed by the construction quality and the temperature and humidity of the environment. Therefore, it is necessary to conduct on-site testing to grasp the actual effect. According to the requirements of JGJ 26-95 and the “Rules” of the “Code for Design of Energy Efficiency for Civil Buildings” of the Ministry of Construction, the index shall not be lower than its limit;

B. Water resistance, freeze-thaw resistance, weather resistance, impact resistance and wind pressure resistance: As external thermal insulation, the contact surface should directly resist the intrusion of rain, freezing and thawing, impact and strong wind. The tensile strength of the alkali-resistant glass fiber mesh cloth matched with the external thermal insulation system should be greater than 200N/cm, and the residual tensile strength after alkali resistance should be not less than 150≥N/cm; the 7-day tensile bond strength of the adhesive should be Above 1 Mpa, the tensile bond strength after water and freeze-thaw resistance should be greater than 0.9Mpa. 2, internal insulation system: there are gun-type polystyrene board (or extruded polystyrene board) + paper gypsum board; GRC insulation board (fired polystyrene board and cement mortar composite); rock wool sandwich Insulation board; reinforced cement polystyrene insulation board, etc.

Carbide Burr

The main uses of carbide burrs:
Finish machining of various metal mold cavities; craft engraving of various metals and non-metals, engraving of craft gifts; cleaning up flash and welds of casting, forging, and welding parts, such as machine foundries, shipyards
Etc.; chamfering and rounding of various mechanical parts and processing of grooves, finishing of the inner hole surface of mechanical parts, etc.

Carbide Burr,Tungsten Carbide Cutting Tool,Double Machine Tool,Grinding Stone

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