Zhejiang Bohai Machinery Co., Ltd is a professional manufacture in conical twin screw barrel,with the area of 13000m. After 10 years of effort innovation,we draw on the advanced manufacturing and processing technologies for screw and barrels, we have strong technical power in the production of different precision screw and barrels,also with a perfect set of quality management system and excellent professional manufacturing equipment to ensure the quality . "BOHAI" screw and barrel spread all over the country, and got the certificate of ISO9001:2015.The output of conical twin screw barrel reach 2500sets /year,our product quality has been accepted by many plastic machinery factories all over the world.