When the part belongs to large or medium size, generally speaking, single cavity is used. On the one hand, it is necessary to consider the fluidity of plastic material filling mold when injection molding, so as to ensure that plastic material can smoothly fill the mold cavity. The second aspect is that the design of more than one cavity will make the mold volume increase leading to aggravation, so that the processing is difficult. The small and medium-sized plastic products can be designed a number of cavities, so that better play equipment and mold capacity, improve production efficiency, economic production. Visit Link: https://www.jasonmolding.com/factors-affecting-the-number-of-cavities-in-plastic-injection-molds/