Development of internal circulation two-platen IMM for thermoplastic polymer

A novel design for an injection molding machine (IMM), specifically an internal circulation direct hydraulic two-platen clamping system, is demonstrated in this study. Due to the patented design of the mold-clamping cylinders, the mechanical structure and hydraulic system of the clamping system are significantly simplified. Experimental tests performed on the IMM prototype CHH200 (results of which were compared with a toggle IMM of the same specification) show that the clamping force partial load rate and clamping force repeatability of CHH200 are higher than those of the toggle IMM. Items produced by IMM CHH200 are shown to be more precise, with weight repeatability reaching 0.867‰ and a low energy consumption of 0.395 kWh/kg. Utilizing the IMM, ultra-precise plastics parts used in automobiles, IT, medicines, and many other products can be molded with lower equipment cost and power cost.