(7)mold blank rapid manufacturing technology。 Mainly dry sand Mold Casting, Vacuum Mold

Casting, Resin Sand Mold Casting Lost Wax Casting, and other technologies。

(8)Other aspects of technology。 Such as the use of nitrogen gas spring pressure side, discharge, quick die technology, stamping unit technology, and cutting edge tech nology and solid surfacing edge inserts die casting technology。

mold materials and surface treatment technology developed rapidly

Industry to the level of mold, material application is the key。 Due to improper s election and use of materials, causing premature die failure, which accounts for more t han 45% failure die。 In the mold material, commonly used cold work tool steel with CrWMn, Cr12, Cr12MoV and W6Mo5Cr4V2, flame hardened steel (such as Japan, A UX2, SX105V (7CrSiMnMoV), etc。; used a new type of hot work die steel American H13, Sweden QRO80M, QRO90SUPREME, etc。; used a pre-hardened plastic mold st eel (such as the U。S。 P20), age-hardening steel (such as the U。S。 P21, Japan NAK55, etc。), heat treatment hardened steel (such as the United States, D2, Japan, PD613, PD5 55, Sweden wins the White 136, etc。), powder die steel (such as Japan KAD18 and K AS440), etc。; panel drawing die used HT300, QT60-2, Mo-Cr, Mo-V cast iron, large-s cale mold with HT250。 more regular use of Precision Die Hard Steel Results YG20 an d other alloys and carbide。 in the mold surface treatment, the main trends are: the infil tration of a single element to the multi-element penetration, complex permeability (su ch as TD method) development; by the general diffusion to the CVD, PVD, PCVD, io n penetration , the direction of ion implantation, etc。; can use the coating are: TiC, TiN

, TiCN, TiAlN, CrN, Cr7C3, W2C, etc。, while heat from the air treatment means to th e development of vacuum heat treatment。 In addition, the current strengthening of the laser, glow plasma Nitriding and electroplating (plating) enhanced anti-corrosion tech nologies are also more and more attention。

The 21st century, in the new situation of economic globalization, with capital, a re increasingly used to provide the products from the mold industry。 In order to meet the user's high-precision mold manufacturing, short delivery time, the urgent demand low-cost, mold industry is extensive application of modern advanced manufacturing t echnology to speed up the mold industry, technological progress, to meet the basic sec tors of the mold process equipment urgent needs。摘要：模具是大量生产产品的工具，也是工业生产的重要程序装备。模具已经成为现代工业和技术发展的重要方向，在工业中模具是现代经济的基础。现代经济发展和技术水平的提高在很大程度上依赖于模具工业的发展，所以对于现代经济和社会发展，模具起到了很重要的作用。模具适应了人们对于高精度、短时间运输、低成本、急需求、先进生产技术的要求，模具工业加速了生产步伐，满足各行各业对模具这一基础工艺装备的迫切需求。

关键词：模具；现代经济；发展趋势;文献综述

模具在工业生产中的地位是一种高产量的产品，具有形状的工具，是工业生产设备的主要过程。

因为模具组件的高效率，高质量，低成本，节约能源和原材料，模具组件的高精度、高复杂性、高一致性、高生产力、低成本，使得其他制造方式根本不能与之比较，这早已成为工业和技术发展的一个重要手段，是当代工业经济的基础。

现代经济和技术的发展水平很大程度取决于模具工业发展水平，所以模具对于当代经济和社会发展的作用将会越来越重。1989年3月国务院颁布的“关于当前产业政策决定点”之模具作为机械行业的第一，生产和中心建设第二（大型发电设备和相应的功率传输设备建立之后），建立模具行业在国民经济的重要地位的重要地位。 模具历史英文文献和中文翻译(4):http://www.youerw.com/fanyi/lunwen_96400.html