Injection Molded Wheel Core With Metal Inserts

The central ring features six evenly distributed metal threaded inserts, connected to the outer belt groove via radial reinforcing ribs. Typically used as a timing pulley or sprocket core in transmission systems, the embedded metal nuts provide high-strength axial locking force, while the plastic body reduces weight, noise, and vibration. Commonly applied in power transmission for automated conveyor lines, office equipment, and light machinery.

The core manufacturing challenge lies in ensuring precise positioning of metal inserts within the mold and achieving strong bonding at the plastic-metal interface. Production strictly controls insert concentricity and hole spacing tolerances to prevent thread deformation or stripping caused by injection shrinkage. Additionally, wall thickness transitions of radial ribs are optimized through mold flow analysis to eliminate weld lines and ensure dynamic balance, preventing runout during high-speed rotation.

Leveraging the Ninghai mold industry cluster, our factory is equipped with Haitian precision injection molding machines and automatic video measuring instruments. We offer one-stop services from UG/ProE structural design and insert positioning fixture development to mass production. For common combinations like PA66 GF/POM engineering plastics with carbon steel/stainless steel inserts, we customize material temperature, injection pressure, and cooling solutions to effectively resolve issues such as insert loosening, incomplete encapsulation, or stress cracking, meeting strict requirements for dimensional stability and assembly reliability.