Elimination of underinjection defects in metal powder injection molding

The main reason for underinjection is that the flow resistance is too high, so that the melt cannot continue to flow. Factors influencing melt flow length include: wall thickness, mold temperature, injection pressure, melt temperature and material composition. These factors can lead to short notes if not handled well.

Therefore, how to eliminate the underinjection defects of metal powder injection molding is of great importance. The following is a brief introduction of the elimination method for the underinjection defects of metal powder injection molding by guangdong dahong new materials:

1、Improper control of process conditions: appropriate adjustment shall be made.

2、The injection capacity of the metal powder injection molding machine is less than the weight of the plastic parts: the larger size of the metal powder injection molding machine should be replaced.

3、The cross section of runner and gate is too small: should increase appropriately.

4、The flow distance of molten material in the mold cavity is too long or there is a thin wall part: cold material hole should be set.

5、Mold exhaust is poor, and residual air in the cavity results in underinjection: mold exhaust system should be improved.

6、Poor flow performance of raw materials: resins with better flow performance should be replaced.

7、If the barrel temperature is too low, the injection pressure of metal powder injection is insufficient or the injection time of filling material is too short.

The above is about the exclusion of under-injection defects of metal powder injection molding organized by guangdong dahong new materials, want to know more about the metal powder injection molding technology related content, welcome to consult guangdong dahong metal powder injection molding MIM technical professional team for your answer!