In bottle cap molding industry, injection is the the major technology in the early stage. With the development of rotary cap compression moulding machine, it play more and more important role in plastic cap molding. Compared with traditional injection moulding for cap,plastic cap Compression moulding is less material waste,easier color changeover, lower cost.
link:http://www.capmakingmachine.com/compression-molding-machine/plastic-cap-molding.html