In recent years, the development of the next trend, though made no small achievement in many ways, but the important manufacturing equipment of plastic water grate mold or can not provide, or in dependence on imported! China's mold machine tool manufacturing industry is still in the international division of labor and in the low-end, high-end product market competitiveness of the industry chain is not enough capacity for the high-end market segments related businesses to provide integrated services is relatively weak, resulting in China's national economy and the needs of national defense and security equipment in key areas is still heavily dependent on imports, the kinds . Water grate mold due to improper heat treatment, resulting in more than 50% of the total failure rate die failure, so the heat treatment abroad plastic water grate mold, more and more use of vacuum furnaces, vacuum furnace and half non-oxidizing atmosphere furnace . Mold heat treatment processes include matrix toughening and surface hardening. Matrix toughening is to improve the strength and toughness of the matrix, reducing breakage and deformation, so it must be in strict accordance with conventional heat treatment processes. The main purpose is to improve the surface hardening of the mold surface wear resistance, corrosion resistance and lubricating properties. Surface hardening in many ways, there are carburizing, nitriding, sulfide, boronizing, nitrocarburizing, seepage metals. Different surface hardening process, can improve mold life several times and even a few times in recent years, there have been some new surface hardening process.