Industrial fan manufacturers found large fan blades before and after the edge in the process of operation is the most easily suffer from wind erosion and sand erosion, rain erosion, began to appear after corrosion paint frayed, when the paint is worn off after began to appear in acceleration sand holes even adhesive is worn through the phenomenon, the ultimate could lead to extreme such blade fracture or fracture phenomenon appears. In order to avoid this kind of phenomenon, adding the front and back edge protection materials on many large fan blades has become a widely recognized method in the industry.

          Before and after the traditional edge protection material is made of 3 m protective film, the film is about 350 microns, excellent flexibility, the breaking elongation rate can be as high as 200% above, this also has the very good aging resistance (1500 hours of artificial accelerated ageing performance), its 40 ℃ below zero still has good flexibility, low temperature resistant performance is good.

          According to the operation of the wind field, the fan at the blade part with film has no abnormal situation after running for four years. The protection principle of the film is to make use of its mechanical properties and aging resistance, so that the blade in the long use process to resist the abrasion of various factors in the environment, and even the adhesive failure and other extreme circumstances can play a certain role in compensating. The film is constructed through the way of paste, which requires strict fit, and there can be no bubbles, wrinkles and other phenomena, otherwise it is easy to fail.

          With the progress of coating chemical technology, a company has developed a solvent-free polyurethane coating product, which is constructed by scraping and coating. After construction, the paint film is more than 300 microns, and the paint film has more than 200% fracture elongation and more than 30MPA fracture strength. Even at minus 40℃, it still has very good flexibility.

           Because the product is constructed by scraping and coating, its adhesion to the substrate and putty can reach more than 7Mpa, which effectively solves the difficulties in the process of film sticking, and provides an effective way for the cost control of industrial fan blade production.

            By using a whole sand wind resistance test method (using the method of sand was carried out on the membrane, this approach can be of 3 mm steel plate mill in about 30 minutes to wear) for comparison test in the form of two kinds of protection results show that the two kinds of protection method being continuous high impact strength of the wind sand after more than 30 minutes time protective film still has not been worn through the phenomenon.

            Overview of integral forming process of industrial fan blade

          There are also industrial fan manufacturers launched a suitable for large wind blade overall molding process, not only can help improve the overall performance of the blade, or it has a higher carrying capacity. The specific principle is that the upper shell is made first, and then the lower shell is made, and the upper shell is molded before the lower shell is solidified. The pre-impregnated reinforcement material reserved for the lower shell is laid at the edge of the upper shell, and the reinforcement material at the joint of the upper and lower shell is continuous, which is solidified into a whole by vacuum bag pressure method.

          The overall molding process is used in curing technology, the overall molding composite blade enclosure, from top to bottom shell joint continuous glass fiber, greatly improve the overall performance of the blade, blade shells become closed structure, has higher bearing capacity, thus it can be reduce as the main bearing the weight of the girder, at the same time completely ruled out the possibility of blade failure caused by bonding quality.

             Advantages of different types of edging machines

           Edge grinding machine, with coarse grinding, fine grinding, polishing once completed characteristics, suitable for grinding different sizes and thickness of metal belt inclined plane, straight edge, supporting equipped with grinding wheel and spare, the grinding wheel has long life, forming rules, high efficiency advantages.

            Edging machine is divided into the following types:

1. Metal belt edging machine

Main function: used for grinding and polishing of bilateral Angle of metal coil.

Applicable materials: stainless steel, copper strip aluminum strip and other metal coil plate.

2, glass edging machine

           Main functions: used for grinding and polishing of glass edges and corners.

Main features: can grind all kinds of round edge, straight edge, duck mouth and other special-shaped edge, and is not limited by the size of glass shape, such as length, width and circle.

         Equipment advantages: set coarse grinding, fine grinding, polishing, chamfering and other processes processed at one time, using frequency converter speed regulation, adjustable range is large, stable speed change; Feed speed and feed rate can be adjusted freely in grinding process. Also has the advantages of small size, light weight, easy to carry, simple operation and so on.

           3, stone edge grinding machine

             Main function: used for marble, granite, grinding and polishing. It can also be used for grinding and polishing tombstone, step stone, etc.

         Main features: adopt variable speed regulating motor, motor seat plate, grinding disc, spindle, flexible rubber coupling assembled together to become grinding head, handrail, ring lever, guide rod, guide sleeve, counterweight and fulcrum hinge to form a balance lever suspension system. The grinding head is installed on the suspension system, which can make the grinding head move up and down as a whole. A special rubber coupling is used between the grinding disc and the spindle. The cooling system is a ring water jacket.

           Advantages of the equipment: the method of replacing the grinding disc can successively complete all the operations of coarse grinding, semi-fine grinding and fine grinding and polishing.

          4. Porcelain edging machine

Main function: used for edge grinding and chamfering of ceramic tile.

Main features: four groups of edge grinding, a group of chamfering design.

          Equipment advantages: the machine processing effect is good, fast speed, high precision, no size head, more no wave and edge collapse and other defects. Tile processing plant equipment: 8-16 arc polishing machine, tile cutting machine.

On the protection of front and back edges of fan blades

         Industrial fan manufacturers found large fan blades before and after the edge in the process of operation is the most easily suffer from wind erosion and sand erosion, rain erosion, began to appear after corrosion paint frayed, when the paint is worn off after began to appear in acceleration sand holes even adhesive is worn through the phenomenon, the ultimate could lead to extreme such blade fracture or fracture phenomenon appears. In order to avoid this kind of phenomenon, adding the front and back edge protection materials on many large fan blades has become a widely recognized method in the industry.

         Before and after the traditional edge protection material is made of 3 m protective film, the film is about 350 microns, excellent flexibility, the breaking elongation rate can be as high as 200% above, this also has the very good aging resistance (1500 hours of artificial accelerated ageing performance), its 40 ℃ below zero still has good flexibility, low temperature resistant performance is good.

         According to the operation of the wind field, the fan at the blade part with film has no abnormal situation after running for four years. The protection principle of the film is to make use of its mechanical properties and aging resistance, so that the blade in the long use process to resist the abrasion of various factors in the environment, and even the adhesive failure and other extreme circumstances can play a certain role in compensating. The film is constructed through the way of paste, which requires strict fit, and there can be no bubbles, wrinkles and other phenomena, otherwise it is easy to fail.

         With the progress of coating chemical technology, a company has developed a solvent-free polyurethane coating product, which is constructed by scraping and coating. After construction, the paint film is more than 300 microns, and the paint film has more than 200% fracture elongation and more than 30MPA fracture strength. Even at minus 40℃, it still has very good flexibility.

           Because the product is constructed by scraping and coating, its adhesion to the substrate and putty can reach more than 7Mpa, which effectively solves the difficulties in the process of film sticking, and provides an effective way for the cost control of industrial fan blade production.

           By using a whole sand wind resistance test method (using the method of sand was carried out on the membrane, this approach can be of 3 mm steel plate mill in about 30 minutes to wear) for comparison test in the form of two kinds of protection results show that the two kinds of protection method being continuous high impact strength of the wind sand after more than 30 minutes time protective film still has not been worn through the phenomenon.

           Overview of integral forming process of industrial fan blade

          There are also industrial fan manufacturers launched a suitable for large wind blade overall molding process, not only can help improve the overall performance of the blade, or it has a higher carrying capacity. The specific principle is that the upper shell is made first, and then the lower shell is made, and the upper shell is molded before the lower shell is solidified. The pre-impregnated reinforcement material reserved for the lower shell is laid at the edge of the upper shell, and the reinforcement material at the joint of the upper and lower shell is continuous, which is solidified into a whole by vacuum bag pressure method.

         The overall molding process is used in curing technology, the overall molding composite blade enclosure, from top to bottom shell joint continuous glass fiber, greatly improve the overall performance of the blade, blade shells become closed structure, has higher bearing capacity, thus it can be reduce as the main bearing the weight of the girder, at the same time completely ruled out the possibility of blade failure caused by bonding quality.