Views: 0 Author: Site Editor Publish Time: 2026-07-11 Origin: Site
Automatic molding machines rely on coordinated pneumatic and hydraulic systems to mass-produce sand molds. The whole process operates in an automatic closed loop without manual compaction or pattern drawing, greatly improving casting production efficiency. The complete standardized operation procedures are as follows.
First, pattern positioning and flask clamping. Empty flasks are automatically conveyed to the molding station, with the mold pattern precisely positioned. Clamping mechanisms lock the flasks to prevent displacement during vibration compaction and prepare for sand filling.
Second, automatic sand feeding and vibration compaction. The sand hopper opens to evenly fill the flask with molding sand. The vibration unit generates high-frequency vibration simultaneously to fully fill sand into mold gaps and eliminate voids, ensuring even sand distribution across the mold cavity.
Third, compaction for shaping. After vibration compaction, the compaction cylinder descends to apply uniform pressure on the sand layer, accurately controlling the mold hardness to prevent mold swelling and collapse during pouring and guarantee dimensional accuracy of castings.
Fourth, pattern stripping. After pressure holding, the machine lifts the pattern automatically to complete slow stripping. Slow separation avoids edge breakage and sand loss, forming intact mold cavities.
Fifth, flask transfer and resetting. Formed sand molds are transported out of the station by conveying mechanisms. The machine simultaneously cleans residual sand on patterns, and flask fixtures reset to start the next molding cycle.
The whole process runs automatically with short single-cycle time to stably produce qualified sand molds. Daily maintenance of air circuits and guide rails can reduce air leakage and jamming faults, sustaining steady molding cycle and mold quality.
