Polyurethane spraying machine is designed for spraying the elastic surface layer of plastic field. It is used for spraying various adhesive and viscous chemical coatings, anti-corrosive paints, PU (polyurethane), EPDM (high elastic plastic) color particle mixed glue, etc. Its main structures includes air compressor, hopper, pump, chassis, spray gun.
Parameter of Spray Paint Machine:
Features of Polyurethane Spraying Machine:
- Small size, light weight, easy to work and transport.
- High work efficiency and low labor intensity.
- The spray tube rotation device is installed, material tube can be rotated arbitrarily during spraying.
- The material pump can transport solid-liquid mixture, and its flow rate varies with the rotational speed.
- The machine can realize stepless speed regulation.
- The chassis is equipped with two pairs of rubber wheelsand brake equipment, which can be flexibly moved by handle.
PU Spraying Machine can spray polyurethane and EPDM in plastic runway. The plastic runway is made of polyurethane prepolymer, mixed polyether, waste tire rubber, EPDM rubber particles or PU particles, pigment, auxiliary agent and filler. It has certain elasticity and color, has certain UV resistance and aging resistance. It is recognized as the best all-weather outdoor sports floor material in the world.
Plastic track is widely used in schools and professional stadiums, track and field stadiums, indoor stadium training track, playground road pavement, indoor and outdoor runway, parks, residents activity venues and other venues. When plastic runway has reached the end of its service life and is no longer able to serve you, or the external damage caused by improper, it is need to be refurbished.
How to Renovate Plastic Track?
- Cleaning runway with floor removal machine: In order to ensure the quality of the plastic surface layer, the base surface must be thoroughly cleaned. It can increase the adhesive strength of the polyurethane, and keep the plastic surface layer thickness uniform. Remove all damaged plastic layers where cracks are formed on the surface.
- Fix the underlying: Remove the plastic layer, first brush the primer, then fill the bottom layer with mixture of glue and particles. The newly laid plastic particle layer should be flattened, the edge seam should be consistent with original bottom layer.
- Spray materials twice with professional spraying machine. After the black rubber layer is solidified, the rubber layer can be sprayed on the surface, and the ratio is: EPDM colloid: PU slurry = 1:1.2. Firstly, PU slurry was added to appropriate amount of catalyst to mix evenly. EPDM colloids were added in the stirring process. The EPDM particle size is selected according to requirements, generally about 0.5~1mm. Then pour materials into a professional sprayer and spray them onto the surface of the black rubber layer. Appropriate amount of thinner can be added according to the thinness of the glue during the spraying process.
- Mark line with a professional road marking machine. YG thermoplastic road marking machine is ideal for the marking work with thermoplastic paints in kinds of roads, vehicle parks, schools. The specially manufactured high-precision cast iron marking equipment to ensure that the marking line is neat, uniform and beautiful. The machine has the advantages of high performance, innovative tech, proven quality, very fuel efficient, easy operation and maintenance.
How to Operate the Polyurethane Spraying Machine?
- Check if the compressor oil and reducer oil are normal before starting the machine.
- Turn on the power to test the machine, and check whether the compressor and reducer are rotating forward.
- Add the solid-liquid two-phase plastic mixture to the hopper, start the compressor, open the compressor air ball valve, and then open the gun air valve to the normal spraying.
- Open the gun valve, reduction gear and pump button, then the material can be sprayed by nozzle.
- After the end of the work, switch off the material pump reducer, gun head air valve, compressor, and compressor air ball valve in turn.
- The reducer handwheel can only be adjusted during work. It can’t be adjusted when it is not working, so as not to damage the machine.
- Adjust the speed between 80~200 rpm. In the spraying process, the gun can adjust the size of the airflow according to different construction process requirements.
- When cleaning the machine, put methanol solvent into the hopper, close the air valve of the gun head and small ball valve of the compressor, open the gearbox, and pump is running normally.
In the construction of plastic runway, it is necessary to grasp the viscosity of the material and temperature. Avoid the case where the viscosity of the coating material is too large, and the construction temperature is low. The mixed material should be remained for a while before the construction. The ratio of the solvent and the catalyst should be controled, under the condition of too much concentration, the low boiling point volatility will make the material appearance quickly dull. The material and primer contain moisture, dirt and oil, which may also cause the material to be bonded weakly, resulting in delamination.