1. Two different internal cavities, connected two nozzles, injected respectively with different colors or different plastic materials;
2. Two identical cores (cores and mold base);
3. The first mold opening:
①Hard plastic is injected, soft isn't;
②Mold opening: take away hard plastic runners;
③Not eject out;
④The core turns 180 degrees around mold center;
⑤Mold closing.
4. The second mold opening:
①Hard and soft plastic are injected at the same time;
②Take away runners on both sides at the same time when mold opening;
③Soft plastic is ejected, hard isn't;
④The core turns 180 degrees around mold center.
5. Design points
①Runner: each of the two cavities has a runner, the core has 2 runners;
②Molding system: ensure all soft plastic is ejected from the cavity side or the cavity slide;
③Ejector system: eject toward soft plastic nozzle, keep hard plastic;
④Cooling system: water line is toward outside;
⑤Others: have information about two-color injection machine: center distance of nozzle; mold locking screw holes; KO hole
⑥Guide pillars of mold base can't be offset, moldbase fixation or clamp.
The article comes from China injection mold manufacturer - Mold Best Assurance Company Limited, website is www.mbamoldanddesign.com
