The correct mold cleaning ratio for epoxy Mold Compound (EMC)

Mold con­di­tion­er is a “more-high­ly” wax-filled mold com­pound that con­di­tions the mold for trans­fer mold­ing epoxy mold com­pound. Pri­or to con­di­tion­ing the mold, it is a com­mon indus­try prac­tice to use Melamine / Clean­ing pel­lets to clean the mold chase/die. The mold clean­ing process typ­i­cal­ly leaves the mold sur­face very dry, and this is why mold con­di­tion­ing is performed.

There are two ways to con­trol the mold clean­ing frequency.

  1. You may do it on a “time” basis, ie. once per day or every 24hr.
  2. Anoth­er way is on a “No. of mold shots” basis, e.g. after 400, 500 or 600 mold shots.

Both of these fig­ures are typ­i­cal indus­try stan­dards, but your par­tic­u­lar sit­u­a­tion may depend on the mold design and mold com­pound prop­er­ties. Some mold com­pound may dirty the mold very eas­i­ly after a few hun­dred mold shots or less per day. In this case, it is rec­om­mend­ed to imple­ment mold clean­ing fre­quen­cy base on “No. of mold shots”.

When order­ing mold con­di­tion­er with epoxy mold com­pound — a use­ful ration is 50:1. You should order at least 1kg of mold con­di­tion­er for every 50kgs of mold com­pound. You may be more, you may need less, and this can be test­ed and val­i­dat­ed. This is a good start­ing point.

To learn more regard­ing epoxy mold clean­ers and epoxy mold con­di­tion­ers, vis­it us at You can also con­tact us if you have any queries regard­ing CAPLINQ’s Epoxy Mold Clean­ers and Con­di­tion­ers.

About Chris Perabo

Chris is an energetic and enthusiastic engineer and entrepreneur. He is always interested in taking highly technical subjects and distilling these to their essence so that even the layman can understand. He loves to get into the technical details of an issue and then understand how it can be useful for specific customers and applications. Chris is currently the Director of Business Development at CAPLINQ.

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