Ningbo Jinyi Mechanical & Electrical Co., Ltd. is a Chinese professional designer, manufacturer and rebuilder of screws, barrels, tie bars and precision parts for the plastics, packaging and food processing machine.We own professional designer team with more than 10 years in the field. We serve screws and barrels for the plastics and rubber industries to processors and OEMs worldwide, countries as United States of America, Italy, Germany, Finland, New Zealand, India and South Africa etc. Our bimetallic barrels (JK1, JK3, JK5, JK7 etc.) and special screws (JPT1, JPT2, JPT3, JPT5 etc.) have been widely used by domestic and oversea customers.