Shrinkage Measurement after IJ1 Round 1

The body mold ended up shrinking too much to fit in with the rest of the parts. Therefore, we measured the shrinkage so that we can scale up the model and create more space for the part to shrink to the correct size.

Cavity Mold Outer Diameter (in):

2.4765

2.4735

2.4785

2.4745

Average: 2.4760in

Injection Molded Pieces Outer Diameter (in) [2 per part, 4 parts]:

2.4395

2.429

2.427

2.4265

2.430

2.429

2.435

2.4285

Average: 2.4305in

Therefore the average shrinkage was: (2.4305-2.4760)/2.4760=6.9%

We will make the according changes in the Mastercam and remachine the mold.