After the mold making process is finished, it’s time to have a mold test, normally we call it mold trial. (t0), as mold trial will produce some sample for us to review the mold. So we should have some basic skills on how to review a mold trial sample, here below is our experience how we do it.
Check all features of part are correctly made
When you take a molded parts, you should check the parts with your original drawing(2D and 3D), and see if all features are correctly made without any missing features. Since sometimes there is a possibility to miss some features from the parts. So you should open your drawing, and check all features on by one. If anything incorrect, you should make a record so as to modify it later.
Check if dimensions are accurately achieved
If all features are made properly, you should always check out dimensions by appropriate measurement tools, like CMM, projector, caliper, pin gauge, etc, and especially for those critical dimensions that noted with tolerance. Just check 5~10 piece of those molded samples. It’s easy to find out any imperfection or mistakes that existing on your parts.
Check the appearance
Appearance check is also an important rule to review your mold trial parts. Normally there might be flash, shrinkage, deformation, flow marks, welding line, burns, etc. however most of those defects can be avoided during the mold design and manufacturing. So our mold design should consider those elements in advance. Otherwise it will be problem for troubleshooting after mold is made.
Check the assembly and fitting
The last step is to try to assemble those relative parts together, and check out if any structural faults that might happen during the mold making process. It’s also a direct way to evaluate if your parts will function properly. So as to ensure our final products will work fine. If anything incorrect, we can arrange a mold modification immediately.