Introduction to the characteristics and applications of sheet moulding compound products
Sheet moulding compound products are not only used in heavy duty vehicles, but also in other industries, such as construction, electronics, railroads, communications and other industries. And this SMC composite material is widely used in various industries, truck front cover is also the same, so why use it, compared to steel and other metal materials, it has what benefits?
Four characteristics of sheet moulding compound products.
Light weight: in the case of ensuring the stiffness and strength, the same parts, using SMC composite material and steel materials, compared with the production, can reduce the weight of 20-30%. Therefore, the heavy truck industry is now focusing on the era of lightweight, SMC composite materials are the ideal material for heavy truck vehicles.
Excellent physical properties: As we all know, the general plastic will melt and soften when heated, but this material can maintain good strength and stiffness even at high temperature, basically it can compete with aluminum alloy material, which is the ideal material to replace steel with plastic.
Corrosion resistance, good bending resistance, high reliability: like the car cover, wind, rain and sun, so require a strong corrosion resistance, and this SMC material, precisely in line with this requirement, it does not need other special treatment itself is a corrosion-resistant materials. At the same time, this material in the impact of external forces, the dent or dent rebound ability, but also much stronger than steel.
Heat resistance: Since the physical properties of this material has been said to be excellent, in the case of heating still does not become soft, so is there specific data to support it? According to the query, this SMC material, can maintain dimensional stability within -50 degrees Celsius to +200 degrees Celsius.
In the production process, sheet moulding compound products are mainly used in metal-to-touch compression molding method, that is, the SMC sheet will be suitable for the requirements of shearing into the required material, and determine the number of layers to join, remove the two sides of the protective film, according to certain requirements of the combination, and placed in the appropriate position in the mold, you can follow the prescribed process parameters to heat, pressure molding.
In order to produce high quality products, it is necessary to use suitable presses and molds, and to strictly control the process conditions, such as charging method, molding temperature, pressure and holding time.
Finally, sheet moulding compound products are used extensively in automotive parts. The 21st century is the era of composite materials, with the development of raw materials and technology improvement, this composite material will definitely play a bigger role in the automotive industry.
To sum up.
Sheet moulding compound products are mainly composed of SMC special yarn, unsaturated resin, low shrinkage additives, fillers and various additives. It first appeared in Europe in the early 1960s, and in 1965, the United States and Japan developed this process one after another. Sheet moulding compound products have the advantages of superior electrical properties, corrosion resistance, light weight and easy and flexible engineering design, its mechanical properties can be comparable to some metal materials, so it is widely used in transportation vehicles, construction, electronic/electrical industries, etc.