The micro-seismic compaction molding machine can cause the mold plate, sand box and molding sand to vibrate at high frequency and small amplitude while the molding sand is being compacted. When the sand box is filled with loose molding sand, there are still many gaps between the sand grains. At this time, the template is directly vibrated and the energy is transferred to the sand grains, causing them to find a new equilibrium position in the continuous movement, thus filling the gaps. Improve its firmness. When vibration is continued during the compaction process, in addition to the above effects, the external friction resistance between the sand particles and the inner wall of the sand box can be reduced, further increasing the compaction effect. Therefore, additional vibration can significantly improve the phenomenon of uneven compaction during compaction. Microvibration during compaction can also achieve a higher average compaction than pure compaction. Because microvibration can improve the fluidity of the molding sand during the compaction process, it can achieve higher average compaction than pure compaction with the same compaction specific pressure. average firmness and a more even firmness distribution. The micro-seismic compaction molding machine can not only perform micro-vibration during compaction, but also perform micro-vibration during the sand adding process, which is the so-called pre-shock before compaction. This can increase the amount of sand filling in the sand box and improve the original compactness and uniformity of the sand mold; it can reduce the height of the pre-filling frame and reduce the stroke of the compaction piston, especially for high sand boxes or complex models. Styling is beneficial.