<ol>
<li>Steel grade verification — spectrometer test</li>
<li>Hardness test — HRC check on cavity and core</li>
<li>Dimensional inspection — CMM report</li>
<li>Surface finish — Ra measurement</li>
<li>Cooling water flow test</li>
<li>Mold trial report</li>
</ol>

<p>Red flags: factory can't show material certs, no CMM equipment, no QC process.</p>

<p>Full guide: https://www.mfgabc.com/guides/mold-quality-control-standards.html</p>

<hr>
<p>你在实际生产中遇到过类似问题吗？欢迎留言讨论。</p>