Advantages Disadvantages
　　Injection molding machine is made shoes, uppers tie on the aluminum last, by the rotary dryer typically direct injection PVC, TPR and other materials, disposable formed sole, now there PU (polyurethane chemical name) injection molding (machine and mold is not the same with the average injection).
　　Advantages: Because it is machine made, large output, so low prices.
　　Disadvantages: If the style, change the mold is more complicated, difficult shoes stereotypes, not cold sticky shoes and exquisite workmanship, it is generally suitable for single sole style orders.
　　Process base
　　object ● temperature, pressure, velocity and cooling control, operation and results
　　● adjusting the injection molding machine settings affect the process and quality
　　● Optimized screw control setting
　　● multistage filling and multistage packing control; crystalline, non-crystalline and molecular / fiber array to impact on process and quality
　　● impact stress, the cooling rate, plastic shrink-quality plastic parts
　　● plastic rheological: how to plastic flow, and is discharged to change the viscosity, shear molecule / fiber relation to the discharge
　　● the relationship between the gating system, cooling system, the mold structure and injection molding process