General, for the precision of the material injection screw has a higher degree of stiffness and strength, precision injection system for a screw in accordance with the processing of materials will vary. In order to enhance the flow injection length and minimize the shrinkage of molding products, precision injection molding machine injection pressure up to 216 ~ 243MPa, and the pressure of high pressure injection molding machines up to 243 ~ 392MPa. In this case, the screw must have sufficient stiffness and strength, high-pressure injection can not occur when broken, such as bending and failures. Die protection device is a precision tooling and quality assurance components products. Together with the common-mode devices as compared to the precision mold stiffness device, to a large 10% ~ 15%, and the move will be the template of the parallelism between the standard 30% to 40% in the general control of 0.05 ~ 0.08mm in order to achieve low-voltage protection for mold and die on the precise control of force. To overcome this shortcoming, precision devices elbow done under the following improvements: the use of high-precision ball-oriented guide to the operation of moving the template to ensure the accuracy of the dynamic operation of the stability of the template; use of a closed-loop control of speed and pressure of the double function of servo valve, precision molds for the realization of the low-voltage protection; pin and the use of steel with high wear resistance of friction pair, and further stabilize the animals and set the parallel degree between the template; precision tune applications module bodies transfer mode of high precision, thus ensuring a dynamic template at any location in parallel to achieve the degree of stability.