What are the aspects of plastic mold processing that affect its accuracy?

How can we improve the accuracy of our plastic molds during processing? First of all, we need to know which aspects affect the processing accuracy of plastic Auto Parts Mold. 

1. Dimensional accuracy
Refers to the degree of conformity between the actual size of the processed part and the tolerance of the part size.

The dimensional accuracy is controlled by dimensional tolerances. The dimensional tolerance is the allowable amount of variation in the size of the part in the cutting process. In the case of the same basic size, the smaller the dimensional tolerance and the higher the dimensional accuracy.

2. Shape accuracy

Refers to the degree of conformity between the actual geometric shape of the surface of the processed part and the ideal geometric shape. There are 6 items for evaluating shape accuracy, such as straightness, flatness, roundness, cylindricity, and line profile. The shape accuracy is controlled by the shape tolerance. The shape tolerances are divided into 12 accuracy levels except for the roundness and cylindricity divided into 13 accuracy levels. Level 1 is high and level 12 is low.

3. Position accuracy

Refers to the actual position accuracy difference between the relevant surfaces of the parts after processing. There are eight items for evaluating position accuracy: parallelism, perpendicularity, inclination, concentricity, symmetry, position, circular runout and full runout. The position accuracy is controlled by the position tolerance, and the position tolerance of each item is also divided into 12 accuracy levels.

Generally, when designing machine parts and specifying the machining accuracy of parts, attention should be paid to control the shape error within the position tolerance, and the position error should be smaller than the dimensional tolerance.