The production method of glass fiber reinforced plastic
Basically divided into two categories, namely, wet contact and dry press molding. According to the characteristics of the process to point, hand paste molding, laminated molding, RTM method, squeezing method, molding, winding molding and so on. Hand laying paste, including hand paste method, bag pressure method, spray method, wet paste low pressure method and no mold paste method.
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At present the world's most used molding methods are the following four.
① hand paste method: the main use of the country have Norway, Japan, Britain, Denmark and so on.
Kenny hand paste products: FRP fan ② spray method: the main use of the country has Sweden, the United States, Norway and so on.
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③ molding method: the main use of the country and so on.
④RTM method (resin transfer molding): the main use of countries have Europe and the United States, Japan.
There are: fiber winding molding method, pultrusion and hot-pressing method and so on.
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China has more than 90% of the FRP products are hand-paste production, the other molding method, winding method, laminated method. Japan's hand-paste method is still 50%. From the world point of view, hand paste method still accounts for a considerable proportion, indicating that it is still alive. Hand paste method is characterized by wet resin molding, equipment is simple, low cost, one can paste more than 10m overall product. The disadvantage is that the degree of mechanization is low, the production cycle is long and the quality is unstable. China introduced from abroad, such as squeeze, spray, winding and other process equipment, with the FRP industry, the new process will continue to emerge.
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