Production method of FRP profiles

Basically divided into two categories, namely wet contact type and dry pressure molding. Such as according to the characteristics of the process, there are hand paste molding, lamination molding, RTM method, extrusion method, molding molding, winding molding and so on. Hand paste molding includes hand paste method, bag pressure method, spray method, wet paste low pressure method and no hand paste method.
There are four of the most used molding methods in the world.
① Hand paste method [1]: the main countries to use it are Norway, Japan, the United Kingdom, Denmark and so on.
Kenny hand paste products: glass steel fan
② Jet method: the main use of countries include Sweden, the United States, Norway and so on.
③ Molding method: the main use of countries are Germany, etc.
④ RTM method (resin transfer molding): the main use of countries have European and American countries, Japan.
There are: fiber winding forming method, pull and squeeze forming method and hot pressure irrigation molding method and so on.
More than 90% of FRP products in China are produced by hand paste method, and others include molding method, winding method, lamination method, etc. Japan still makes for 50 percent. From the point of view of the world, the hand paste method still accounts for a considerable proportion, indicating that it still has vitality. The hand paste method is characterized by wet resin molding, simple equipment, less cost, can paste more than 10m at a time. The disadvantages are the low degree of mechanization, long production cycle and unstable quality. China has introduced squeezing, spraying, winding and other process equipment from abroad. With the development of FRP industry, new process methods will continue to appear.