Designing and manufacturing method for powder injection molding piston ring

A designing and manufacturing method for powder injection molding a piston ring comprises the following steps: (1) designing an elliptic equation of the piston ring according to the technical requirements of the piston ring product and providing the free opening gap size; (2) conducting engineering analysis on structural strength, stress-strain, and friction and wear by means of a computer; (3) designing and selecting a powder material, designing a proportion ratio of powder and adhesive, and manufacturing a feeding material for injection by means of mixing and granulating; (4) designing and manufacturing an injection mold for the elliptic piston ring; (5) manufacturing a three-dimensional elliptic piston ring blank by injecting, degreasing, sintering and post-processing; (6) cutting an opening; and (7) inspecting translucency, elasticity and size of the product, performance testing, packaging, delivering or warehousing. The present designing and manufacturing method employs the technique of powder injection molding and computer-aided design and engineering analysis, designs and selects powder materials, and designs a proportion ratio of powder and adhesive; due to feeding particles being uniform, the piston ring structure is more uniform, and has improvements over the traditional casting process.