Pneumaticrubber mandrel is a kind of cylinder bag that can expand, shrink,used to form concrete component of cavity??? It is easy to be used, convenient and durable, is soft and can  fold, curly,contraction when it isn''t inflate, it have the enough strength towithstand the pressure of concrete when it is inflated, this isincomparable with any traditional template. it is used inreinforced concrete members, including stake, roof, roof boardcolumn, beam, building, water conservancy project (shipyards,slipway, dock). Construction practice proves that Inflatable rubbermandrel is simple, not only save materials, and has a shapecharacteristics, it could be round, oval, rectangle, vaulted,trapezoidal pipeline, etc. Also you can make a straight hole, etc,can make a building structure light, thin wall hollow, change theconcrete performance have been used rigid characteristic templatesituation.

 1.The Performancecharacteristics: 

1- Design scientificand reasonable used inflatable rubber mandrel, or casting parts,finished product can meet the requirement of design, easyoperation, save work, save time, save material.

2- Have good ageingresistance performance and long service life this product usesynthetic rubber, natural rubber and strengthen layer vulcanize.Has very good resistance to bulge, flexibility and elasticity, socan satisfy all sorts of work in the conditions ofuse. 

3- Widely applicabletemperature , within the scope -10 °C ~ 90 °C of the materialwithout change. 

4- For buildinglight-duty construction provides favorable conditions to stresshollow concrete component, due to the rubber mandrel, the weightthan use stress solid component light 20%, so it can reducing theweight of the upper structure of building, can make the pilefoundation short, increase span,  make the construction becomesimple and safety. 

5- Constructiontechnology is simple, safe, health, use it only need a few simpletools, without special process. only put the mandrel into negativereinforcement cage, inflate air to achieve work pressure, thenpouring the concrete. When the concrete freezing, put gas outmandrel , in thus complete the product component forming, and itnot pollute the environment.

2.Standard specifications ofArd rubber mandrel

1> Diameter (D)  : From 0.2m to 3 m.

2>Total Length(TL) : From 1m to28m.

3>Otherspecification also available upon customer’s request.