Bridge inflatable core membrane, also known as precast concrete hollow slab rubber inflatable mandrel inflatable rubber mandrels, inflatable mandrel, mold balloon, rubber balloon. Mainly used in highway bridge concrete post-tensioned tensioned beam before pouring molding engineering. Also used culverts, sewage works. 

 Features: bridges inflatable mandrel is to strengthen the layer of vulcanized rubber and fiber products made with high tensile strength, elasticity and tightness, filled with compressed air, instead of the original wooden mold, bamboo mold steel, can be used repeatedly, is a lower cost and speed up the construction progress of the concrete products complementary products. 

 A bridge inflatable mandrel inflatable products, easy to use, after use easily removed, to save labor time and labor costs, reduce the intensity of the work. 

 (2) the bridge of my factory production inflatable mandrel investment return rate, each air bag can be reused 70-80 times, saving the cost of inputs. I plant many years of experience in production, provided the product leakage experiments have all been manometry side, ensure product quality, focusing on corporate and brand image. 

 Bridge inflatable mandrel is all natural rubber and synthetic rubber with the use of technology, to ensure product quality stability. This end, I provide quality service, return customers, answer customer technical problems, and even send workers to the customer construction to on-site guidance. Buyers peace of mind. 

 Scientific and rational design 

 Application bridge inflatable mandrel to the system or on-site pouring out of the finished component, can meet the design requirements, and the operation is simple, saving labor, saving, saving material. 

 5 good aging resistance, long service life 

 This product with synthetic rubber, natural rubber and the reinforcing layer vulcanized made. Both good anti-inflation strength and elasticity and flexibility, they are able to satisfy the use in a variety of working conditions. 

 (6) the applicable temperature range 

 Within the range of -10 ℃ ~ +90 ℃, the material has not changed. 

 Provide favorable conditions for the light of the construction site construction 

 I stress hollow concrete structures, due to bridge inflatable mandrel, its weight than non-I stress solid component is 20% lighter, therefore reducing the weight of the superstructure of buildings, can make the pile to shorten the span increases, on-site construction is simple, safe and . 

 Construction process is simple, safe, sanitary 

 Bridge inflatable mandrel, with only a few simple tools, no special technology. Mandrel into the negative reinforcement cage, the inflation pressure of the working pressure, ie, pouring concrete, and the mandrel deflated out until the initial setting of concrete to complete the molding of the finished component, do not pollute the environment. 

 9 bridge inflatable mandrel changing the shape and other characteristics 

 Inflatable mandrel changing the shape and other characteristics, can be round, oval, rectangular, arched, octagon, trapezoid aperture; straight into the hole, cut face (positive ramp change) building structure can change the light, thin-walled hollow slab. 

 10 bridge inflatable mandrel fixed 

 (1) due to vibration of concrete core mold to float, so must be, down, left and right are to be fixed, plus the briquette to overcome the buoyancy. 

 (2) General the φ250mm mandrel stirrup spacing of 80cm. Such as the diameter increased spiral spacing to be reduced accordingly. 

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