Inflatable mandrel inflatable mandrel inflatable mandrel bridge, also known as the rubber inflatable mandrel is an expandable, contraction of the cylindrical bag inflatable mandrel, the vulcanized rubber and fiber reinforced layer made with high tensile strength , elasticity and tightness, used to form a cavity concrete elements, in the manufacture of hollow components, it will be placed in the middle, and filled with compressed air, inflated after sufficient strength to withstand the pressure of concrete, can replace the original wooden mold, bamboo mold, steel, open the valve capsule that is shrinking, and capsules can be withdrawn from the cavity. It is easy to use, economical and durable, can be repeatedly used, not soft, inflatable can shrink any folded, curled, for reinforced concrete pumping holes, including piles, roof trusses, roof columns, beams, construction, hydraulic engineering (dock slipway, jetty). Construction proved capsule pumping holes process equipment is simple, not only to save material, and has the shape changing characteristics, can be as round, oval, rectangular, arched, octagonal, trapezoidal and other pipeline. You can also become straight hole, variable cut faces, etc., can become light building structures, thin-walled hollow, concrete properties has been used to change the status of a rigid template to reduce costs and speed up the construction progress of concrete products supporting products. Inflatable mandrel Use 1, into the mold with a rope pulling bridges, tunnels inflatable mandrel | precast hollow capsules | rubber inflatable balloon penetration tendons concrete cage, placed outside the inflatable at the mouth. 2, inflatable A. open the inlet valve inflated, inflated with a pressure gauge control monitoring of bridges and tunnels inflatable mandrel | precast hollow capsules | rubber inflatable balloon pressure. B. When the bridges, tunnels and inflatable mandrel | precast hollow capsules | rubber inflatable balloon when the air pressure to use the pressure, the intake valve closes. (Using the inflation pressure shown in Table III) C-shaped bridges, tunnels and inflatable mandrel |. Precast hollow capsules | rubber inflatable balloon should be alternately inflated until it reaches operating pressure. D. Note bridges, tunnels inflatable mandrel | precast hollow capsules | rubber inflatable balloon is inflated can not overpressure. 3, fixed and pouring concrete vibrator A. When concrete bridges, tunnels inflatable mandrel | precast hollow capsules | rubber inflatable balloon will go up, therefore, must be up, down, left and right to be fixed, generally φ250mm bridges, tunnels inflatable mandrel | precast hollow capsules | rubber inflatable balloon stirrup spacing 80cm, such as diameter increased, the fixed spacing corresponding narrowing. B. pouring concrete and solid components are basically the same, note the use of high frequency inserted vibrators or vibration from both sides at the same time, to prevent bridges, tunnels inflatable mandrel | precast hollow capsules | rubber inflatable balloon about displacement, vibration rod-side position is best not to touch the bridges, tunnels and inflatable mandrel | precast hollow capsules | rubber inflatable airbags. 4, form removal when the initial setting of concrete, open the bleed valve, to the bridges and tunnels inflatable mandrel | precast hollow capsules | rubber inflatable balloon out of time depending on number of cement visible. 5, washing bridges, tunnels inflatable mandrel | precast hollow capsules | rubber inflatable bag, test the water check. The company specializes in the production of inflatable mandrel www.hsjianshuo.com welcome to buy