Metal Injection Molding MIM Parts For Grippers

MIM = Powder Metallurgy + Injection MoldingMIM is a typical cross-disciplinary product. The integration of two completely different processing technologies (powder metallurgy and plastic injection molding) allows engineers to break free from traditional constraints and obtain low-priced, special-shaped stainless steel, nickel, iron, copper, titanium and other metal parts through plastic injection molding, so it has greater design freedom than many other production processes.

Process of MIM The MIM process is mainly divided into four stages, including granulation, injection, degreasing and sintering, and subsequent machining or wire drawing, if necessary, electroplating and other secondary processing technologies.

Granulation Fine metal powder and paraffin binder, thermoplastic plastic are mixed in precise proportions. The mixing process is carried out in a special mixing device that is heated to a certain temperature to melt the binder. In most cases, mechanical mixing is used until the metal powder particles are evenly coated with the binder and cooled to form particles (called raw materials) These particles can be injected into the mold cavity.

Injection Feed the granular raw material into the machine for heating and inject it into the mold cavity under high pressure to obtain the green body by injection molding. This process is very similar to plastic injection molding. The mold can be designed with multiple cavities to improve productivity. The shrinkage of the metal parts during sintering should be considered when designing the mold cavity size.

Debinding Debinding is the process of removing the binder from the green body. After debinding, the brown body is obtained. This process is usually completed in several steps. Most of the binder is removed before sintering, and the remaining part can support the part to enter the sintering furnace. Debinding can be done by many methods, the most common method is solvent extraction. The debinded parts are semi-permeable, and the residual binder is easily volatilized during sintering.

The brown body after sintering and debinding is placed in a high temperature and high pressure controllable furnace. The brown body is slowly heated under gas protection to remove the residual binder. After the binder is completely removed, the brown body will be heated to a very high temperature, and the gaps between the particles will disappear due to the fusion of the particles. The brown body shrinks directionally to its designed size and transforms into a dense solid to obtain the final product.

During the sintering process, the overall size of the brown body will shrink by about 20%.

Advantages of MIM MIM combines the advantages of powder metallurgy and plastic injection molding, breaks through the limitations of traditional metal powder molding technology on product shape, and uses plastic injection molding technology for mass production and efficient forming of complex shaped parts. It has become a near-net forming technology for modern manufacturing of high-quality precision parts, and has incomparable advantages over conventional powder metallurgy, machining and precision casting.

Qinhuangdao Zhongwei Precision Machinery Co., Ltd. was founded in 1997 and is a manufacturer and technical solution provider focusing on metal powder injection molding (MIM) and investment casting and forging products. The company is located in Qinhuangdao High-tech Zone, with automotive system 16949 certification, a strong R&D team and technical strength, providing customers with fast and effective solutions and stable product supply.

Since its establishment, the company has always adhered to the principle of customer-oriented, quality-first, independent innovation and continuous improvement. Technology-first development policy.

The company's main business is the research and development, design, production and sales of metal product structural parts. The products can be widely used in key application fields such as consumer electronics, medical devices, and automobiles. It has advantages and rich experience in product research and development, mold development, process design, product manufacturing, quality control, etc.

The company has a stable core team, an excellent technical team, and has introduced advanced equipment to form the core competitiveness of MIM products in the industry and become a strategic partner of MIM products for international customers.