Proving a Custom Crate Mold With Your Own PP and Part
For a custom plastic injection mold, make the demonstration run on your own PP and a crate-sized part, and tie acceptance to agreed sample criteria rather than catalog figures.
Before placing an order for a custom crate mold, decide how the supplier will prove the tool on your own material and part, not on a generic sample. Ask for the demonstration to use your PP grade and a part in the crate format, with the 400 × 300 × 300 mm example treated only as a reference dimension from the catalog, not a guarantee for your tool.
Build the request for quotation around comparable trials. Will the supplier run your PP under the same conditions intended for production? Which sample parts will be measured, and against what drawing? If your crate has wall, rib, or corner features, ask how the demonstration will show they fill and release consistently. For an acceptance test, agree in advance on the sample quantity, the characteristics to check, and who judges pass or fail.
Before requesting a quote, confirm with the supplier which material will be used in the demonstration, how the sample part will be measured against your drawing, and what acceptance criteria will apply to the trial run.