SMC non-metallic composite material column type Pole Top Boxmanufacturing process?
SMC composite is the abbreviation of sheet molding compound, that is, sheet molding compound. The main raw materials are GF (special yarn), up (unsaturated resin), low shrinkage additives, MD (filler) and various additives. It first appeared in Europe in the early 1960s. Around 1965, the United States and Japan developed this technology one after another.
SMC composite, the raw material for manufacturing the protection box of column mounted low-voltage distribution box, has the following advantages:
1. Environmental protection and green
SMC composite material is a new type of environmental protection material without halogen and harmful substances to human body, which can meet the needs of green development in the future.
2. Chemical corrosion resistance
SMC composites have good corrosion resistance to acid, dilute alkali, salt, organic solvent and seawater, while metal materials are not acid resistant and easy to corrosion.
3. Light weight and high strength
Specific strength and specific modulus are one of the indicators to measure the bearing capacity of materials. The specific modulus is equivalent to that of steel, but its specific strength can reach 4 times that of steel.
4. Good fire and flame resistance
SMC composite fireproof and flame retardant; The material is tested by the national authority as class B non combustible material
5. Good heat resistance
SMC composite can still maintain its physical properties in harsh high-temperature environment. Its working temperature is - 60 ° to 150 ° C and its thermal deformation temperature is more than 280 ° C.
6. Low thermal conductivity and small expansion coefficient
When there is a temperature difference, the thermal stress is much smaller than that of metal, and the thermal insulation performance is good.
7. Excellent anti-aging properties
The SMC composite has anti-aging properties. The aging resistance test showed that the thickness of the surface aging was 20 years less than 50. μ m。
8. Long service life the service history of SMC composites can prove that its service life is at least more than 30 years
9. High production efficiency, short molding cycle, easy to realize mechanization and automation.
SMC composite molding process is a kind of FRP composite molding process with high production efficiency. SMC composite molding process has many advantages: 1. Short molding cycle, suitable for mass production. 2. Closed mold molding, no styrene and glass fiber flying, good working environment. 3. The forming process is simple, easy to mechanization and automation, and can be formed even without skilled workers. 4. It can form large products. SMC molded products have the characteristics of accurate size, smooth surface, good repeatability of product appearance and size, complex structure, one-time molding and secondary processing without damaging products. The disadvantages of SMC composite molding process include the use of press, metal mold, heating device, etc., and large initial equipment investment. However, large-scale production can reduce its early investment cost. Therefore, SMC composite material is suitable for the manufacturing of new non-metallic composite material column mounted low-voltage distribution box protection box. Characteristics of SMC non-metallic composite column mounted low voltage distribution box protection box:
(1) Fully insulated, safe to use: SMC non-metallic composite material column mounted low-voltage distribution box is protected by excellent insulating material SMC composite material, which has high-performance insulation resistance and breakdown voltage, can prevent leakage accidents, can maintain good dielectric performance at high frequency, does not reflect and block the transmission of microwave, does not rust, and can be used for a long time, SMC non-metallic composite post mounted Pole Top Boxis suitable for dense or narrow places to avoid electric shock;
(2) Corrosion resistance and long service life: the non-metallic composite material column mounted Pole Top Boxmaterial SMC composite has good corrosion resistance and can effectively resist the corrosion of water, gasoline, alcohol, electrolytic salt, acetic acid, hydrochloric acid, sodium potassium compound urine, asphalt, various acid-base soils and acid rain. The product itself has good anti-aging properties. The surface of the product has a protective layer with strong ultraviolet resistance. Double protection makes the products have higher anti-aging properties. It is suitable for all kinds of bad weather. It can still maintain good physical and mechanical properties in the environment of - 50 ℃ - 150 ℃, and the protection grade is IP54. SMC non-metallic composite column mounted low-voltage distribution box has long service life and maintenance free.
(3) Convenient installation and handling: it adopts plate structure combination and modular installation, which is suitable for handling, simple installation, and can be assembled or disassembled on site.
(4) Heat insulation and anti condensation: the non-metallic composite material column mounted low-voltage distribution box is a protective box material. SMC composite is a kind of thermal poor conductor, which can withstand high temperature and low thermal deformation rate, and can reduce the impact of environmental temperature difference on the inside of the box. Compared with metal materials, it can effectively reduce condensation and frost in the box;
(5) Beautiful and anti-theft: SMC non-metallic composite column type low-voltage distribution box is protected. The surface of the box is designed with diamond protrusions to prevent small advertisements from sticking. And the shape is unique and beautiful, beautifying the urban environment. As SMC composite is a thermosetting composite, its recycling value is low, which can effectively prevent the theft of low-voltage distribution box.
