油缸驱动齿条脱螺纹的注塑模具设计OA

Addressing the injection molding challenges of a stepped annular tube fitting featuring side bosses,through-holes,and internal threads,the paper systematically conducted research on mold structure design and manufacturing processes.Based on the structural characteristics and process requirements of the part,a three-plate mold was designed with a glue feeding system transitioning from a pinpoint gate to a side-edge bottom lap gate.To satisfy the assembly requirements of the symmetrically arranged boss screw posts on both sides,as well as the precision and initial position control of the internal threads,a composite mold scheme incorporating multiple coordinated mechanisms was proposed.The side bosses were demolded using a double-slider core-pulling mechanism driven by inclined guide pillar.The internal threads were unscrewed by an oil-cylinder-driven rack-and-pinion gear set.After demolding,the parts were directly picked up by a robotic manipulator without the involvement of an ejector system,thereby achieving fully automated production.The oil cylinder actions were controlled by the mold opening and closing signals from the injection molding machine to ensure the coordinated operation of all mechanisms.Trial molding results indicated that the part achieved high molding precision,stable structural integrity,and smooth mechanism operation.Combined with the optimized cooling system,the production efficiency met expectations and satisfied the requirements for mass production.