Production Method Of Fiberglass

Basically, it is divided into two categories, namely wet contact type and dry pressure molding. For example, according to process characteristics, there are hand lay-up molding, lamination molding, RTM method, extrusion method, compression molding, winding molding, etc. Hand lay-up molding also includes hand lay-up method, bag pressing method, spray method, wet lay-up low-pressure method and fuzzy hand lay-up method.
The following four molding methods are most commonly used in the world.
① Hand lay-up method: Mainly used countries include Norway, Japan, the United Kingdom, Denmark, etc.
② Injection method: Mainly used countries include Sweden, the United States, Norway, etc.
③ Molding method: Mainly used in countries such as Germany.
④ RTM method (resin transfer molding): The main countries using it are Europe, the United States, and Japan.
There are also: fiber winding molding method, pultrusion molding method, hot pressure filling molding method, etc.
More than 90% of FRP products in my country are produced by hand lay-up method, and others include molding method, winding method, lamination method, etc. Japan's hand lay-up method still accounts for 50%. Judging from various countries around the world, hand-padding method still accounts for a considerable proportion, indicating that it still has vitality. The characteristic of the hand lay-up method is that it uses wet resin for molding, has simple equipment, low cost, and can lay up an entire product of more than 10 meters at a time. The disadvantages are low mechanization, long production cycle, and unstable quality. Our country has introduced extrusion, spraying, winding and other process equipment from abroad. With the development of the FRP industry, new process methods will continue to appear.