Adopting gradually water drop shape and flat shoulder tpe flow channel .with triangle diversion technology. ladder style flow, effectively eliminate the extrusion process for high pressure lead to mould mouth deformation.The upper die lip is a manual push-off type fine-tuning elastic modulus lip .precisely adjustment.with a flat blocking bar can eliminate the material stranded, solve the materials decompose problem because of stay too long.The die lip can exchange, according to ifrent thickness equipped with ifferent open die lip. Applicable for PC, PS, PP, PE, PLA, PVC single-layer or multi-layer plate.