With the large-scale industrialization of MIM process technology, general-purpose production equipment in traditional powder metallurgy and injection molding industries, as well as various specialized metal injection molding: industrial production equipment has been widely used in the industrial production of metal injection molding. The improvement of industrial production efficiency and equipment automation, processing continuity and equipment performance requirements by enterprises has promoted the industrialization process of metal injection molding. The all-round development of the MIM industry needs to improve the production efficiency of enterprises through production equipment. Correct selection and mastery of various equipment in the MIM production process can improve product quality, output and labor productivity, and accelerate the development of industrialization.
At present, the mixing process mainly adopts traditional double-planet mixer, single-screw extruder, piston extruder, twin-screw extruder, eccentric wheel mixer, z-shaped impeller mixer, etc., which can ensure the uniformity and high efficiency of mixing. The injection process can also learn from traditional injection equipment, such as double-loop injection molding machine, double-template injection machine, no-tie rod injection machine, automatic injection machine, electromagnetic dynamic injection molding machine, etc., which can better meet the technical requirements of filling.
For the degreasing process, since degreasing is a field that has never been involved in the relevant industry before, the principle is: under the premise of ensuring that the parts obtained by injection molding are not deformed, the various components in the binder are used to continuously undergo physical and chemical changes with the increase of temperature, and gradually become gaseous or liquid substances, which are removed from the injection molding blank to achieve the purpose of removing the binder. Therefore, the position of this process in the entire MIM technology is particularly special and important.
The degreased parts have almost no strength, and a little vibration may damage the parts. At the same time, consider the degreasing and sintering stages to reduce the energy waste caused by repeated heating of parts as much as possible, and consider integrating the traditional degreasing, sintering, heat treatment and other single processes into a comprehensive process, which can reduce uncertainties in production, improve the quality of molded parts, and greatly improve production efficiency.
The concept of continuous sintering equipment was born with the proposal of the comprehensive process. In order not to make our country lose in the fierce competition in the same world and occupy the dominant position in the industry, it is very necessary to actively develop MIM technology, especially the integration and synthesis of the traditional single process to form an effective comprehensive process.
