Compression molding process and die structure: compression molding is also known as the press molding, compression molding, compression molding, molding it is mainly suitable for thermosetting plastics. The solid plastic powder or loose granular directly into the feeding chamber of the die, through heating, pressurizing crime is that they gradually softening melting, and then according to the shape of the cavity flow forming, after curing for plastic parts. Molding compression plastic bakelite, amino plastics, epoxy resin, unsaturated polyester resin, the product of phenolic, amino plastic yield, wide application. Compression products mainly used in the fields of mechanical parts, electrical insulation, transportation and daily life. Characteristics of compression molding production process control is relatively mature, equipment and tooling used relatively simple in injection molding, can product molded plastic parts of large plane, internal orientation degree is low, performance is relatively uniform, molding shrinkage of small; the disadvantage is the long production cycle, low efficiency, difficult to realize automation, cannot form the shape of complex products the poor, dimensional accuracy and product. |