-
ABOUT US
-
-
-
Introduction to the production process of powder injection molding
Release time:
2025-04-24
With the advancement of technology and the acceleration of innovation, products are gradually developing towards miniaturization and microminiaturization, greatly driving the development of micro-fine processing technology. Compared with other micro-fine processing technologies, powder injection molding technology has advantages such as a wide range of applicable materials, the ability to produce complex shapes, and the ease of mass production of parts with precise micro-fine structures.
Powder injection molding can be divided into ceramic powder injection molding and metal injection molding.
Powder injection molding process: feeding preparation, injection molding, debinding, and sintering.
1. Feed preparation is the most crucial step, as defects introduced in this step cannot be eliminated in subsequent processes. Among them, the binder, as the core part of the feed, directly affects the uniformity and formability of the feed, and thus affects the subsequent processes and the performance of the final product.
2. The injection molding process can be simply described as: first, the feedstock is heated to its melting temperature, and then pressure is applied to force the melt into the mold cavity, where it cools and forms.
3. Since the emergence of MIM technology, various MIM process paths have been formed due to different binder systems, and debinding methods are also diverse. Debinding time has been shortened from the initial days to a few hours now. From the debinding step, all debinding methods can be roughly divided into two categories: one is the two-step debinding method. The two-step debinding method includes solvent debinding + thermal debinding, and siphon debinding - thermal debinding, etc.
4. Sintering is the final step in the MIM process. Sintering eliminates the pores between the powder particles, making the MIM product fully dense or near fully dense. In metal injection molding, due to the use of a large amount of binder, the shrinkage during sintering is very large, with a linear shrinkage rate generally reaching 13%-25%, which presents a problem of deformation control and dimensional accuracy control.
:Next Page
Next Page:
More Events
EAGLE-GLOBE GROUP
Add: No. 168 Yong'an South Road, Hai'an City, Jiangsu Province, China.
Tel.: 86+513+88832617 88832618
88162808
Fax: 86+513+88833248 88162888
Email: yqjt@jsyq.cn
Website