microPEP always encourages new clients to visit us for a tour our manufacturing operations.

This is because understanding the micro molding process can help facilitate better project communication and collaboration.

With that objective in mind, the videos on this page are intended to give you a glimpse into some of microPEP’s molding operations: micro insert molding, insert molding of impellers, automated molding of connectors, and automated molding of stators.

Automated micro insert molding video

The stamped lead frames arrive on a reel from PEP Wauconda and are introduced into a vertical-vertical 20-ton molding press. The strip passes through a vision system and gets aligned into the two-cavity mold. The mold closes and injects a glass-filled nylon resin around the lead frame base with the terminal legs exposed. The strip continues to progress, two lead frames stations at a time, and exits the press to be singulated.

Automated insert molding of impellers video

This is a four-cavity operation with two bottom halves and one top half. microPEP’s SCARA robot places powdered metal inserts onto two core pins in the mold. The mold then rotates over to the injection unit to have the resin injected into the mold. The microPEP mold rotates again and the four parts, sprue and runner are pushed or knocked-out of the cavities (knock-out pins are pushed up to eject them).

Automated molding of connectors video

This operation has two bottom-half, four-cavity mold bases and one top-half that is also four-cavity (stationary). Four molded connectors are taken out of the mold base. The parts are then degated while there are then four sets of four stamped terminal inserts being loaded into that mold at the insert loading station. That bottom mold base then moves to the molding station while the second bottom base with molded connectors comes from the molding station to the degating station, where the process is repeated. The four-cavity stamped insert terminal is supplied to us from PEP Brainin. There is an operation prior to the insert molding station where the carrier gets broken off the stamped terminal strip. (This is the end of the terminal that actually gets loaded into the cavity sets.)

Automated molding of stators video

There are three, two-cavity mold bases and one top half of two cavities (stationary) on this rotary molding machine. From left to right, you can see the pole plates being picked up off the rotating Barrington table and loaded into the mold base. Four pole plates per cavity. This loading operation is happening while the middle mold base is being injected with resin. At the same time, the far right mold base is having the two completed molded stator removed from the mold automatically and put into the degating station, then traveling down a conveyor to the shipping tote.