Changsha ZMADTO Plywood Co.,Ltd

Cylindrical formwork   has been widely used in building construction, it can be installed without hoisting equipment and built at high place, but some may have doubt that why there are be installed dislocation? Today we will talk with you to understand why the cylindrical formwork needs to be installed in a misplaced position. 1. Dislocation installation can integrally combine the cylindrical formwork on the cylinder, which reduced the joints of the cylindrical formwork and helped improve the demoulding effect of the cylinder. 2. Dislocation installation can reduce the press of the cylindrical formwork, uniform the press of the whole formwork to get better sealing effect at the upper and lower joints. Dislocation installation can make the column very high at one time, which is much stable for taller cylindrical formwork, and avoid the trouble of secondary splicing.

Building formwork can be divided into steel formwork, aluminum formwork, wood formwork, plastic formwork, large formwork, etc. Today follow us to discuss   wooden building formwork . 1. The main specifications of building formwork are: 915X1830mm, 1220x2440mm, 1250x2500mm, etc. General wooden building formwork specifications are: 1220x2440, also called the big red board; 1830x915, also called the small red board, and special specifications can be customized. 2. Building formwork thickness: 9mm, 12mm, 15mm, 18mm, 21mm, 24mm... 3. Building formwork material: poplar, pine, eucalyptus, birch, hardwood, mixed wood, etc. 4. Types of construction formwork glue: phenolic glue, melamine glue, urine glue, etc. 5. Building template film paper: Taier brown film, domestic brown film, black film, etc.

Q: Why should wet   wooden formwork   before pouring concrete? A: Wet wooden formwork before pouring concrete is to prevent the formwork from absorbing the moisture in the concrete, which may affect the molding quality and strength of the concrete. The wooden formwork will absorb the moisture in the concrete, especially when at the beginning of pouring, if the formwork is not fully watered and moistened, it will reduce the fluidity of the concrete, and it may easily harden in a short time, and pitting will appear after the formwork removed. In addition, fully watered wooden formwork will tight the gaps and it is not easy to leak grout, and able to avoid edges and corners.

1. Raw material preparation Usually,  oriented strand board  taken 8 to 10 cm small-diameter wood and fast-growing wood as raw materials. Except wood, waste and scraps left over from board processing can also be used as raw materials for oriented strand board. 2. Dry Oriented strand board dryers generally use single-channel dryers, using conventional medium-temperature drying technology. The entire drying process is divided into pre-drying stage, drying stage and equalization stage. In the end, it is necessary to ensure that the moisture content of the shavings is controlled at about 2%. 3. Sorting shavings There are two forms of shavings sorting, one is to use mechanical methods to sort the shavings according to the geometric size through grids of different apertures or set gaps, and the other is to separate the shavings with different densities and suspension ratios by adjusting the airflow speed. 4. Directional paving The shavings of the surface layer are mixed with glue, arranged l