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Flow marks in powder injection molding

Categories: FAQStars: 3StarsVisit: -Release time: 2019-06-24 09:11:00
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Powder injection molding, should pay attention to flow mark, it is a common defect of MIM process. Let's explore the causes and phenomena of flow mark defects according to previous experience of MIM parts. Initial injection of raw materials is rapidly cooled, and then interface is generated with subsequent injection of raw materials. Flow mark refers to concentric circle mark with injection gate as the center.

Reasons and treatment

Main reasons are too low mold temperature and slow injection speed; another point is that fluidity of raw materials is too low, temperature of molds and raw materials is too low, injection room is at low temperature or uneven temperature, there is no cold plug or product is too small, and thickness becomes too large.

Keywords in the article: Powder Injection Molding
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