People used to make mold one by one at the very beginning. It took a long time to manufacture a whole set if the product with many parts in this way. Since the bridge mold was innovated, it also called family mold, if the quantity requirement is not high volume, we can put many different parts in one mold, in this case, one shot can mold many different parts. For the bridge mold, people saved lots of time of the production, especially the parts need to be assembled together with one same color, bridge mold will be the best proposal, it is much helpful to keep the same color of the parts as the parts are molded from the same shot. As the quality of the mold became better and better. The products were keeping improving.
