Fly Cutting Roll Forming Machine FRP molding process for the spray winding forming, in the production process of China's advanced glass fiber reinforced plastic molding process, "spray lining process" can be understood as a spray gun technology to make FRP winding container lining molding process. Lining is the glass fiber reinforced plastic winding container lining, from the structure is divided into lining layer and the transition layer, mainly play the role of anti-corrosion seepage. FRP container structure by the anti-corrosion lining layer, reinforced structure layer, the appearance of anti-aging layer composition. To ensure that both good resistance to medium corrosion, but also has sufficient physical and mechanical properties to meet the dress requirements. The use of glass fiber high tension, multi-level, multi-angle, wrapped head winding to meet the organic, inorganic solvents and chemical and electrochemical corrosive media storage, transit and production needs to meet the non-electrolyte fluid transfer, The need to meet the resistance of all kinds of support shear and buried and load mechanical requirements. Design flexibility, container wall structure performance. Fiberglass-wrapped FRP can adjust the physical and chemical properties of tanks, towers, etc. by changing the resin system or reinforcing material to suit the needs of different media and working conditions. Through the structural layer thickness, winding angle and wall thickness structure design to adjust the carrying capacity of the tank to adapt to different pressure levels, volume size, and some special performance of the FRP tank,Fly Cutting Roll Forming Machine the tower is the need for isotropic metal Material can not be compared with it. Corrosion resistance, anti-leakage, good weather resistance. FRP has a special corrosion resistance, in the storage of corrosive media, glass fiber reinforced with other materials can not match the superiority, can withstand a variety of acid, alkali, salt and organic solvents, we can see the application of glass fiber is very common, but The quality of glass fiber reinforced plastic products is dependent on raw materials, construction technology and other factors. FRP spray lining process as a domestic emerging mechanized production process is a great advantage.
The advantages of jet molding:
1, the production efficiency is 4-8 times higher than the hand layup.
2, product integrity is good, no seams, high shear strength between layers, high resin content, corrosion resistance, good resistance to leakage.
3, can reduce the flash, cut cloth and the remaining glue consumption.
4, product size, shape is not restricted.
5, the jet can make the catalyst and resin before spraying in the hydraulic pressure in the nozzle evenly mixed, so when the jet without compressed air leakage, jet air pollution less.
First, the material preparation: raw materials are mainly resin and non-twisted glass fiber yarn.
Second, the mold preparation: preparation work, including cleaning, assembly and coating release agent.
Third, the jet molding equipment: jet molding machine sub-pressure tank, pump for and integrated three:
1, pump for the plastic jet molding machine, is the resin initiator and accelerator were pumped to the static mixer, fully mixed and then sprayed by the gun, known as the gun within the mixed type. Its components are pneumatic control system, resin pump, auxiliary pump, mixer, spray gun, fiber cutting ejector and so on. Resin pump and auxiliary pump from the rocker rigid connection, adjust the auxiliary pump on the rocker position, can guarantee the proportion of ingredients. In the air compressor under the action of resin and additives in the mixer evenly mixed through the gun to form droplets, and cut off the fiber continuously spray to the mold surface. This jet is only one glue spray gun, simple structure, light weight, less waste of the initiator, but the Department of mixing,Fly Cutting Roll Forming Machine so that after the immediate cleaning to prevent jet jam.
2, the pressure tank for the glue jet is the resin glue were installed in the pressure tank, by entering the tank of gas pressure, so that glue into the spray gun continuous discharge. It consists of two resin cans, pipes, valves, spray guns, fiber cutting ejectors, trolleys and brackets. Work, connected to the compressed air supply, the compressed air through the gas-water separator into the resin tank, glass fiber cutter and spray gun, so that resin and glass fiber continuously sprayed by the gun, resin atomization, glass fiber dispersion, Mixed evenly after settling on the mold. This jet is a resin mixed in the spray gun, it is not easy to plug the gun nozzle.
3, integrated jet molding machine combines the advantages of the above two molding machine to further expand the advantages of equipment, using a temperature controllable resin, catalyst mixing containers, simple operation and uniform mixing. The resin and the curing agent are sucked out of the corresponding container by the pump. The glass fiber is cut by the glass fiber cutter and sprayed continuously through the ejector. The resin and the curing agent are atomized and the glass fiber is dispersed and mixed to settle on the mold ,Fly Cutting Roll Forming Machine This molding machine reduces the evaporation of the initiator and the catalyst to reduce the air pollution effectively reduce the harm to the human body, and the independent way of mixing effectively solve the problem of barrel clogging.
Injection molding process control
First, the jet process parameters:
1, the resin content of the injection molding products, resin content control in about 90%.
2, spray pressure When the resin viscosity of 0.2Pa • s, resin tank pressure of 0.05 ~ 0.15MPa, the atomization pressure of 0.3 ~ 0.55MPa, in order to ensure uniform mixing of components.
3, the angle between the different spray gun spray resin mixing distance is different from the general use of 20 ° angle, spray gun and mold distance of 350 ~ 400mm. Change the distance, to high-speed spray gun angle, to ensure that the components in the mold near the surface of the intersection of mixed, to prevent glue lost.
Second, jet molding:
① ambient temperature or resin temperature should be controlled at (25 ± 5) ℃, too high, easy to cause the gun jam; too low, mixed uneven, slow curing.
② No water is present in the system. Otherwise, the product quality will be affected.
③ before molding, mold spray a layer of resin, and then spray resin fiber mixed layer.
④ Before injection molding, adjust the air pressure, control resin and glass fiber content.
⑤ spray gun to move evenly to prevent leakage spray, can not take the arc, the overlap between the two lines less than 1/3, to ensure uniform coverage and uniform thickness.
⑥ After spraying a layer, immediately with the roller compaction, pay attention to edges and corners and convex surface, to ensure that each layer flat, discharge bubbles, to prevent the fiber from the burr.
⑦ every layer after spraying, to be checked, qualified and then spray the next layer.
⑧ the last layer to be thinner, so that the surface smooth.
⑨ Immediately after the jet has been cleaned, it will prevent the resin from curing and damaging the equipment.