Water grate mold design and preferences to be considered rigid, orientation, unloading mechanism, positioning method, the gap size and other factors in order to increase productivity, reduce losses generated runner pouring water grate mold using multi-cavity mold can be in a mold to complete simultaneously a plurality of the same or different article. In mass production of high efficiency, high precision, high-life die. Now the use of advanced mold plastic mold design and manufacturing technology to enhance the application of computer-aided design and numerical simulation of mold design, mold design to reduce scrap rates, optimize mold process, reducing electricity consumption. Mold is still very optimistic about the prospects for the development of plastic products, with most of the metal mold industry can not do without supplies, many scientists believe that the future development of the industry will die of new materials, new technology direction. Production of plastic light cover mold quality, easy handling, easy construction, easy to substations, power plants indoor and outdoor channel maintenance and cleaning.