Inflatable rubber mandrel is a kind of cylinder bag that can
expand, shrink, used to form concrete component of cavity, in the
process of manufacturing hollow component, put it in the middle,
and filled with compressed air, make the capsule expand, as the
concrete component solidification then can empty gas from the
cavity, pulled out the capsule. 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 to withstand the pressure of
concrete when it is inflated, this is incomparable with any
traditional template. it is used in reinforced concrete members,
including stake, roof, roof board column, beam, building, water
conservancy project (shipyards, slipway, dock). Construction
practice proves that Inflatable rubber mandrel is simple, not only
save materials, and has a shape characteristics, 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 the concrete performance have been used
rigid characteristic template situation.
The Performance characteristics:
1- Design scientific and reasonable used inflatable rubber mandrel,
or casting parts, finished product can meet the requirement of
design, easy operation, save work, save time, save material.
2- Have good ageing resistance performance and long service life
this product use synthetic rubber, natural rubber and strengthen
layer vulcanize. Has very good resistance to bulge, flexibility and
elasticity, so can satisfy all sorts of work in the conditions of
3- Widely applicable temperature , within the scope 10 °C ~ +90 °C
of the material without change.
4- For building light-duty construction provides favorable
conditions to stress hollow concrete component, due to the rubber
mandrel, the weight than use stress solid component light 20%, so
it can reducing the weight of the upper structure of building, can
make the pile foundation short, increase span, make the
construction become simple and safety.
5- Construction technology is simple, safe, health, use it only
need a few simple tools, without special process. Only put the
mandrel into negative reinforcement cage, inflate air to achieve
work pressure, then pouring the concrete. When the concrete
freezing, put gas out mandrel , in thus complete the product
component forming, and it not pollute the environment.
Standard specifications of Ard rubber mandrel
1> Diameter (D) : From 0.3m to 2.2 m.
2>Effective Length (EL) : From 6m to24m.
3>Total Length (TL) : From 7m to28m.
4>Other specification also available upon customer’s request.
Technical parameters of rubber mandrel: