1. Project Introduction

Traditional medical prostheses such as artificial joints, prosthetics, and dentures generally use dewaxed casting and CNC material reduction processing methods. Dewax casting technology has complex procedures and low production efficiency. The processing process is accompanied by the removal of a large amount of pollutants such as smoke, dust, and wastewater, which is easy to cause environmental pollution. More importantly, the precision of the products produced is low, which seriously affects the repair and healing effect. CNC material reduction machining technology usually presents problems such as serious material waste, serious tool wear, and complex structure tool interference. Selective laser melting is an advanced additive manufacturing technology that uses a high-power-density laser beam to melt metal powder and directly form it. This technology can directly manufacture metal parts with complex structures, dense tissues, good mechanical properties, and high precision. It is one of the most advantageous forming technologies in rapid manufacturing technology, especially in the rapid digitalization of medical implants and dentistry. The field of precision intelligent manufacturing has broad application prospects. At present, 3D printing technology is leading the transformation and upgrading of the traditional denture digital manufacturing industry to automation, precision, and intelligence. It can realize personalized manufacturing, shorten the denture manufacturing cycle, realize green customized production, and make artificial joints based on the geometric characteristics of the product. Personalized, efficient and fast additive manufacturing for prosthetics, and dental prosthetics.

2. Cooperation content

(1) Brief introduction of the main relevant technologies involved

This project adopts a high-precision grating ruler, fully closed-loop control, high positioning accuracy, and the thickness of the powder laying layer can reach 10μm. It is flexible and adaptive scraper, so that the powder laying is smooth and even, and the forming accuracy is high. Intelligent selection optimization algorithm, dedicated process parameter package, and light weight complete dentures can also be printed with internal porous grids. The system has an active preheating function, which can greatly reduce the residual stress of the molded parts and effectively suppress the warping of the molded parts. The forming atmosphere adopts a pulsed vacuum circulation system, which exhausts oxygen quickly, which can greatly reduce the consumption of protective gas. The system has complete system parameter process package and post-treatment evaluation system. The parameters are open and extensible, suitable for a variety of metal powder materials. Adopt modular design and independent research and development. From structural design, optical path system, electronic control system, slicing algorithm, path planning to system software, non-standard customization can be quickly realized. At the same time, it has powerful self-diagnosis functions, is convenient to maintain, and can realize remote control.

(2) Proposed cooperation areas and partners

Digital metal 3D printing technology for medical implants can realize the rapid manufacturing of personalized products in any complex shape, and has entered the clinical application stage in the manufacturing of artificial joints/prosthetics, oral denture restoration and orthodontic treatment. According to incomplete statistics, 94% of my country's population has dental problems, and the average annual consumption of dentures has reached 80 million. In 2013, my country used more than 18 million denture restoration products, including crowns, bridges, movable braces, etc., with total product sales exceeding 3.6 billion yuan. With the increasing awareness of national health and the accelerating trend of population aging, it is expected that the demand for denture products in my country will surge to 230 million pieces by 2020, and the total market volume will exceed 50 billion yuan. Digital 3D printing intelligent manufacturing technology can realize the personalized and precise production of medical implants, reduce costs and production cycles, improve patient satisfaction and comfort, and will produce significant economic and social benefits.

(3) Proposed cooperation model

Technology transfer, technology licensing, industrialization

4. Project implementation unit

In 2004, China Academy of Sciences, Zhejiang Province People's Government, and Ningbo City People's Government jointly established the Ningbo Institute of Materials Technology and Engineering of China Academy of Sciences (referred to as Ningbo Institute of Materials). For more than ten years, Ningbo Institute of Materials has always adhered to the positioning of "transforming science and technology into productivity." Through implementing a series of effective talent introduction and training plans and measures, it has introduced more than 300 high-level talents from around the world, cultivated a group of young scientific and technological talents, and established a team with strong innovation capabilities, An innovation team capable of undertaking highly integrated R & D activities. The institute currently has 1048 employees of various types, including 292 at senior levels and 171 at deputy senior levels. The average age of the formal employees is 33.6 years old; including 2 academicians, 3 at outstanding youth, 32 at the "Thousand Talents Plan" of the Organization Department of the CPC Central Committee, 79 in the "Thousand Talents Plan" of Zhejiang Province, 38 in the "Hundred Talents Plan" of the Chinese Academy of Sciences, 3 young and middle-aged innovation leading talents in the Ministry of Science and Technology, 4 in the "Ten Thousand Talents Plan" of scientific and technological innovation leading talents, and 3 among the top young talents. Leading teams with talents and focusing on subject planning, 53 teams have been formed, of which 1 team is supported by the Ministry of Science and Technology's "Innovation Teams in Key Areas";2 teams are supported by the International Innovation Team of the China Academy of Sciences, and 2 teams are supported by the "Innovation Cross-Team" of the Chinese Academy of Sciences;6 teams are supported by Zhejiang Province's key innovation teams;18 teams are supported by Ningbo City's key science and technology innovation teams, and 10 teams are supported by Ningbo City "3315 High-end Innovation Team". While strengthening the construction of the talent team, it has also provided a large number of reserve talents for social training. Ningbo Institute of Materials currently has 15 postgraduate training points, including 6 doctoral points, 6 master's points, and 3 professional degree master's points. As of the end of 2017, there were 889 graduate students in school; the institute has 2 postdoctoral research mobile stations, and 399 postdoctoral students have been enrolled, including 106 postdoctoral students in the station.

The institute has built a platform that can meet its own development and industrial needs, and has the ability to serve and support regional industrial development. It has established four major types of support platforms: public testing, professional research and development, engineering, and advanced manufacturing, and currently has more than 500 million yuan of advanced scientific research equipment; it has established the National Engineering Laboratory for Carbon Fiber Preparation Technology, the National Engineering Laboratory for Rare Earth Permanent Magnet Materials and Application Technology, the Zhejiang Key Laboratory of Magnetic Materials and Application Technology, the Zhejiang Province Key Laboratory of Marine Materials and Protection Technology, and the Zhejiang Province Graphene Manufacturing Innovation Center.