Jolt squeeze green sand molding machine

Green sand molding equipment
Micro-vibration molding machine, is a casting machinery. It consists of micro-vibration molding part, sand compaction part and sand box ejecting part. Micro-vibration molding part by the micro-vibration motor installed under the table to complete the sand compaction part and sand box ejected part of the metal chamber instead of the cylinder piston body compressed air to push the indenter, compaction of sand, compressed air to push the top bar, ejected sand box, remove the sand, complete the modeling, the table is equipped with a spring below the table to support the table, reduce the table impact, reduce noise. The utility model has simple structure, light weight, low noise, long life, and is suitable for sand molding of small and medium-sized castings.
Bestech company through the pneumatic micro-vibration molding machine vibration characteristics of research. Firstly, the mechanical model of the vibration motion of the pneumatic micro-vibration molding machine is established, and then the segmental difference equation of the vibration process is obtained by mathematical derivation. For the nonlinear vibration system studied in this paper, due to its sensitivity to the initial conditions, theoretically, chaotic vibrations may be generated.Bestech concluded experimentally that the vibration compacting of the pneumatic micro-vibration molding machine is a chaotic vibration.
The micro-vibration compaction molding machine can make high frequency and small amplitude vibration of the molding plate, sand box and sand while the sand is compacted. When the sand box is filled with loose sand, there are still many gaps between the sand grains, so the template vibrates directly and transmits energy to the sand grains to find a new equilibrium position in the continuous movement, thus filling the gaps and improving the compactness. In the compaction process, when the additional vibration continues, in addition to the above-mentioned effect, it can also make the sand particles and the sand box wall between the external friction resistance is reduced, further increasing the compaction effect. Therefore, additional vibration can significantly improve the phenomenon of uneven compactness during compaction.
Compaction with micro-vibration can also obtain higher average compactness than simple compaction, because micro-vibration can improve the fluidity of the sand during compaction, so it can obtain higher average compactness and more uniform compactness distribution than simple compaction with the same compaction ratio. Micro-vibration compaction moulding machine can not only carry out micro-vibration at the same time of compaction, but also during the process of sand addition, which is called pre-vibration before compaction. This can increase the amount of sand filling in the sand box and improve the original compactness and the uniformity of the compactness of the sand; it can reduce the height of the pre-filling frame and the stroke of the compacting piston, which is especially beneficial for the molding of high sand boxes or complex models.