Product Details

pneumatic tubular forms used for manufacturing concrete culvert formwork

Inflatable rubber mandrel is made of rubber and vulcanized fiber reinforced layer made products, with high impact, tensile strength, elasticity and tightness after into the air, can replace the original wooden mold, steel, can be used repeatedly, is a low-cost and accelerate the construction progress of Quan products matching products.

Construction Practice has proved that the capsule hole pumping equipment is simple, not only to save material,

and has the shape changing characteristics that can be round, oval, rectangular, arched, octagonal, trapezoidal

pipe. You can also become a straight hole, variable cut faces and so on. Building structures can be lighter,

thin-walled hollow steel template to change the status of the concrete has been in use.

Product Features:

A scientific and rational design: Apply rubber inflatable mandrel, prefabricated or site pouring out of the product

components, can meet the design requirements, and simple operation, saving labor, time, is material.

2, good aging resistance, long life: This product is made with whole into the rubber, natural rubber and

vulcanized reinforced layer. Both horizontal good tensile strength, and elasticity and flexibility, they are able to

meet in a variety of operating conditions.

3, for a wide range of temperatures: in the range of -15 ℃ to 95 ℃, the material does not change.

4, for the construction site construction provides a strong light conditions: prestressed hollow concrete structures, the use of rubber mandrel, which is 20% lighter weight than non-prestressed solid components, thus reducing the weight of the upper part of the building, the pile can be shortened span increases, the construction site is safe and easy.

5, the construction process is simple, safe, and sanitary: Use rubber mandrel, with only a few simple tools, no

special technology. As long as the mandrel into the steel cage, inflatable pressure to the working pressure, the

pouring of concrete, to be initial setting of concrete, the mandrel bleed out, to complete the finished molded

components, do not pollute the environment. .

Working pressure

Diameter(mm)	80	120	150	200	250	400	500	600	700	800	900	2200
inflation pressure (MPa)	0.12	0.10	0.08	0.07	0.05	0.04	0.035	0.03	0.027	0.026	0.025	0.005

Technical parameters of rubber inflatable airbag :

Items	Index
Terence of Thickness, mm	3.2±0.2
Hardness(Shore A)	65±5
Adhesive tension of rubber and fabric,N/25mm	≥20
Tensile strength, M pa	≥12
Elongation at break, %	≥350
300% Stretch set length, M Pa	6
Stretch for deformation ratio	≤20 %(Prevent distortion)
Suitable temperature,°C	-15—95
Appearance	No cracks, no bubbles on the surface; the length of impurities trace is not more than 3mm; the depth is not more than 1.5mm; the quantity of the trace is not more than one; the deformation is not more than 2mm.

Common Specifications		Special sizes, twin-tube plus coat
φ180mm X 6-20m	φ400mm X 10-40m	350 X 530(540)mm X 10-40m
φ200(φ220)mm X 10-20m	φ500mm X 10-40m	320 X 520(540) X 10-40m
φ240(φ250)mm X 15-40m	φ600mm X 10-40m	350(360) X 560mm X 10-40m
φ300(φ330)mm X 15-40m	φ620mm X 10-40m	360 X 640(650)mm X 10-40m
φ350(φ360)mm X 10-40m	φ700mm X 10-40m	320 X 520(550)mm X 10-40m

schematic cross section for ARD pneumatic rubber core model