In　order　to　improve　the　manufacturing　efficiency　and　product　quality　of　transparent　and　complex　plastic　knobs,　a　hot　runner　injection　mold　is　introduced　in　this　paper.　Based　on　a　shared　hot　runner　system　and　a　module　combination　of　the　mold　holders,　inserts　and　the　beryllium-copper　cored　cooling　components,　an　effective　general　model　for　hot　runner　injection　molding　is　developed.　The　beryllium　copper　insert　extrusion　process　is　employed　to　copy　with　the　requirements　of　great　variety,　high　quality,　low　price　and　short　producing　cycle　for　knob　products.　The　results　of　CAE　analysis　and　production　validation　for　typical　knobs　and　insert　extrusion　process　demonstrate　the　effectiveness　of　the　newly　developed　hot　runner　injection　molding　and　that　the　product　quality　fulfill　the　requirements　of　real　manufacturing　process.　Copyright　©　2010　by　ASME.