MOLDING METHOD OF BLOW-MOLDING HOLLOW TANK BODY WITH BUILT-IN COMPONENT AND PRE-MOLDING TEMPLATE DEVICE

摘要

a molding method of blow-molding a hollow tank body with a built-in component is provided the method molds the hollow tank body by molding the sheet parisons (18,19) in the half molds (3, 4) after the moving cooperation of the half molds (3, 4), an expanding mechanism of a pre-molding template device, the template half plates (1, 2) and the bases (8, 9), the half molds (3, 4) are respectively leaned against the closed template half plates (1, 2), and the sheet parisons (18, 19) are leaned against the half molds (3, 4) by blowing and/or sucking so as to be pre-molded. The tank body is molded after placing the component into it. A pre-molding template device is also provided. An expanding mechanism and the template half plates (1, 2) are mounted on the bases (8, 9), and the bases (8, 9) are mounted on a rail bracket (7), the bases (8, 9) are driven by a power device to move on the rail bracket (7). The invention reduces the product cost, enhances adaptability to the uneven sheet parisons, increases product yield, and allows the built-in component to minimize the number of the openings on the tank wall and to realize low permeability of the molded hollow tank body.