{"id":1513,"date":"2022-05-28T09:59:00","date_gmt":"2022-05-28T01:59:00","guid":{"rendered":"https:\/\/srqwj.com\/?p=1513"},"modified":"2024-05-30T10:09:38","modified_gmt":"2024-05-30T02:09:38","slug":"long-yuan-cheng-xing-3dp-sha-xing-da-yin-zhu-li-zhong-guo","status":"publish","type":"post","link":"https:\/\/srqwj.com\/en\/news\/long-yuan-cheng-xing-3dp-sha-xing-da-yin-zhu-li-zhong-guo\/","title":{"rendered":"Longyuan 3DP Sand Printing Helps China's Foundry"},"content":{"rendered":"
China is a foundry country, casting production in 2021 reached 51.3 million tons, the industry scale ranks first in the world. China Foundry Association data statistics show that the existing 26,000 domestic foundries, including sand castings market size of about 120 billion yuan. However, in recent years, the development of the industry is facing difficulties, energy saving and emission reduction pressure, shortage of skilled workers, serious homogenization of competition and other issues come to the fore. In order to get out of the dilemma, enterprises have invested a lot of money in new product development and technological transformation, and with the slowdown in the growth rate of economic development, attenuation of the demographic dividend and rising comprehensive costs, the casting industry, the overall reduction in the value-added products, industrial transformation and upgrading of the pace of slowing down the urgent need to explore a new road of transformation and development. Traditional technology has been unable to change the situation, there is an urgent need for many foundry enterprises \"innovation and empowerment\" of the new technology - at a lower cost, predictable returns, build enterprise product technology from low-end to high-end conversion of the \"Green Channel\".<\/p>\n\n\n\n
In this context, 3DP sand printing technology (also known as \"binder jet sand 3D printing technology\") into the people's field of vision, after years of development and maturity, has been very competitive. In this paper, we can see the domestic sand 3D printing equipment appeared in the production line of a private casting enterprise in Xianyang City, Shaanxi Province, for their casting products to give the \"asymmetric competition\" technical advantages, and successfully enter the high-end casting market.<\/p>\n\n\n\n
Sand casting and forging, extrusion, welding, milling and other metal processing technology, compared with the most simple and efficient metal molding technology, so it is widely used. Traditional sand casting is mainly used in mold turning sand or core box way modeling, need to make wooden molds or metal molds, manufacturing molds is time-consuming, costly and risky, so that many foundry companies in the early stages of new product development is faced with the dilemma of choice - if the molds are opened and can not get the order, it will be a loss of mold fees for nothing. In this case, in addition to new product development, some small quantities of parts, complex parts of the demand is also difficult to meet. On the other hand, the mold sand itself has many process shortcomings, such as mold assembly and demolding for the assembly margin reserved for mold assembly and demolding tilt margin, resulting in sand casting products processing removal of a larger amount of high dimensional error, casting surface finish is poor and other issues. Therefore, the higher quality requirements of complex castings have to give up the sand casting process, and turn to other more costly alternative processes, such as pressure casting, precision casting, etc..<\/p>\n\n\n\n
The emergence of 3DP sand printing technology can largely change the unfavorable situation that sand casting is in. The use of 3DP sand printing technology does not require molds, direct printing of sand, can be completed with the minimum time and minimum cost of new product development and delivery of small and medium volume products. After 3DP process validation, the casting process can be perfected, the contract was successfully signed, and then invested in opening molds for large-volume manufacturing, which can save a lot of investment in molds. In terms of quality, 3DP sand type is not subject to the constraints of the mold sand turning process, with 10 micron level of high precision, complex structure of one free molding, part of the cast aluminum casting surface accuracy can be comparable to the precision casting, but also reduces the assembly errors caused by the scrap rate, reducing the labor of workers, the overall economic benefits are very significant.<\/p>\n\n\n\n
In recent years, driven by both technology and market demand, China's 3DP sand printing technology has developed rapidly. Beijing Longyuan Automatic Forming System Co., Ltd (a subsidiary of SANDI Technology, referred to as \"Longyuan Forming\"), a leading domestic 3D printing equipment and manufacturing service provider, has independently developed and launched AFS-J1600 and AFS-J2100 series of mass production equipment, which has realized a printing speed of less than 15s\/layer and passed the 1000-hour equipment stability test, with good printing accuracy and intrinsic quality. The equipment has passed the 1000-hour stability test, has good printing accuracy and inherent quality, and is designed to meet the needs of aluminum, iron, magnesium, steel and other applications, with a wide range of abrasive systems and binder materials.<\/p>\n\n\n