The invention discloses a manufacturing method for a plastic fuel tank. Six special extruders with automatic weighing control pump fixed-quality and quantitative melt, continuously extruding a six-layer parison from inside to outside via a co-extrusion die head. The thickness ratio of each layer is HDPE : adhesive : barrier material : adhesive : regrind : HDPE = 37: 1.5: 2: 1.5: 46: 12. The blow mold has two fuel tank cavities, each equipped with an air inlet and an air return hole, with an overflow area between them and a raised dividing line in the middle. The method uses a single-station blow molding machine to produce two fuel tanks in one mold at a time, greatly improving production efficiency, reducing space occupation, lowering investment and energy consumption of the blow molding machine, and reducing raw material consumption per fuel tank.
Country Code: CN
Application Number: CN200910031815.5
