Mold cleaning is a process where major maintenance bottlenecks often occur because molds are pulled faster than they can be cleaned and made production-ready. I have visited plants where molds waiting to be cleaned line hallways and toolrooms, taking up valuable bench space.

Many times, in order to meet production demands, molds get reset dirty or the cleaning process is rushed, which subjects tooling to more damage through hurried handling. The question is asked, "Can we run it the way it is, or does it really need to be cleaned?" In companies where firefighting is the accepted culture, the mold will be reset and started; if all the parts come out clean, it runs. Once this happens a few times, management comes to assume that molds need to be cleaned only when the residue level is bad enough to migrate out onto the part, or until the mold locks (galls) up.

 Some shops handle cleaning chores by enlisting non-skilled employees or toolroom apprentices to wash tooling and plates as quickly as the repair technician can take them apart. This practice works, unless the product has critical flash, dimensional or aesthetic specifications, or the mold has a history of maintenance, reliability or quality issues. It is difficult for the repair technician to accurate troubleshoot mold and part defects when all the track marks are washed off from the tooling and plates.                      

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