... hot treatmentTempering , Quending , NitridingMain Processing EquipmentSodick, Seiki, CNC , high speed carve , EDM ,wire cut , drillAdvantage1. Precision plastic Injection mould ... screen printing Ultrasonic/spin welding Sonic stitching, Hot stamping and heat sealing.3. More ... strict accordance with ISO9001 quality management system. China injection mould manufacture made plastic video doorbell housing