Yuyao Good Plastic Hardware Co., Ltd. is an ISO 9001 certified, private-owned enterprise that focus on all kinds of molding services, plastic injection and mould base. Our factory was founded in 1999.,our staff of industry professionals has over 20 years of accumulated experience to provide you with innovative and cost-effective Plastic Mold Making solutions. Mold Making: Choosing the Right Option While there are a variety of mold options, the choice of mold is usually determined by the type and design of the part, production requirements and type of plastic to be run.