The Troubleshooter Part 126: Thick parts have special gating requirements

摘要

It's always a mystery when the big FedEx truck shows up at my door with a package containing nothing but a part. This time the surprise was a big, thick part with a sprue and runner attached, solid black. I waited more than a week for a call or e-mail to tell me what I could do to help, but nothing happened, so I decided to look at the part to see if I could figure out the mystery. The walls were thick, in the range of 0.350-0.450 inch. The subrunner feeding the gate and the main runner were 0.375 inch in diameter.