UNBESTON is one of the most professional plastic mold manufacturers and suppliers in China. Please feel free to wholesale high quality plastic mold for sale here from our factory. Good service and competitive price are available. A plastic mold is a tool used in the manufacturing process of plastic products. It is typically made from metal and consists of two or more halves that fit together to form a cavity. When molten plastic is injected into the cavity and allowed to cool and solidify, it takes the shape of the mold, producing a plastic part.