Back bolt type without keel Porcelain plate dry anchoring system applied chemical bonding (planting bar) principle and back bolt principle, developed a new technology without keel. The use of back bolt type of anchor, the development of the anchor, embedded in the decorative panels, the screw into the bottom of the expansion, and the unique drill in the back of the decorative panel of the extension of the hole to form a stress-free fastening mode.
The use of expansion bolts in conventional processes can only be used in the compression zone of concrete and can not be used in the cracking zone. It is difficult to determine whether the facade of a building surface is a compression zone or a cracked area. It is limited in construction and is generally not suitable for permanent construction. The use of expansion bolts if not long stainless steel may be corroded, resulting in expansion bolts loose, or even fall off. Friction type expansion bolt safety is poor, in the repeated winds easily loose. There are also embedded parts in concrete. The shortcomings of embedded parts is trouble, requiring the design position of the deviation within ± 10mm, so there is a certain degree of difficulty. The anchorage is the use of structural adhesive to bond steel and concrete, the use of colloid adhesion to form surface-surface contact with the full length of the anchor, the substrate without extrusion pressure, can be used in the concrete crack area. Chemical anchors are composed of chemical agents (resin anchors) and metal rods. Pull strength, anti-vibration, anti-fatigue, no shrinkage, anti-aging, fast carrying, easy installation, low cost, and concrete wall is commonly used in connection with the base.