of http://www.hebeikaiao.com Hebei the Hengshui kaeo engineering rubber rubber inflatable mandrel inflatable mandrel 

 Main physical properties of the hollow slab rubber inflatable mandrel: 

 1, the hardness of the SH: 42 ± 5 

 2, tensile hardness MP ≥ 4.5 

 3, tearing the permanent deformation of ≤ 30 

 4, elongation at break% ≥ 450 

 5, the use of temperature -10> = 80 (° C) 

 6, thickness tolerance ± 0.2 (mm) 

 Hollow slab rubber inflatable mandrel steps: 

 1, In the hollow plate rubber inflatable mandrel in place, open the inlet valve, pneumatic air compressor. Control with pressure gauge monitoring inflation pressure, precast hollow slab air bag inflation pressure of 0.027 MPa. When the pressure to achieve the use of pressure, the valve closes to stop inflation. 

 2, hollow slab rubber inflatable mandrel inflatable Note shall not exceed the pressure. 

 Hollow slab rubber inflatable mandrel first use before examination inflatable, full time in the determination of each set of pressure, according to the initial setting time of concrete to determine the required number of air compressor, to ensure that the plate girder vertical rib the upper part of the concrete before the initial setting of the lower part of the concrete pouring, to avoid construction joints, thus ensuring the integrity of each piece of plate girder concrete. 

 Field test, with the air compressor inflatable of 6m3/min each set of precast hollow slab rubber inflatable mandrel inflation time 15 ~ 20min, takes less time, smaller impact on the formation of concrete construction joints . 

 http://www.hebeikaiao.com kaeo inflatable mandrel rubber inflatable mandrel inflatable mandrel