Qingdao Donrex Co., Ltd.

Our engineering team reviews customer requirements and creates detailed 3D CAD models and technical drawings, ensuring every dimension and tolerance meets specification before production begins.

High-precision CNC machining centers mill and drill the mold cavities with micron-level accuracy. Coolant systems protect tool life while achieving superior surface finishes on hardened steel molds.

Skilled technicians carefully assemble mold components, aligning core and cavity halves with precision guide pins. Each mold undergoes trial fitting and adjustment before being approved for production.

Molten aluminum alloy (ADC12) is injected at high pressure into the mold cavity. The die casting process ensures consistent part geometry, excellent dimensional repeatability, and superior mechanical properties.

Raw castings are machined on CNC grinding centers to achieve precise surface flatness and dimensional accuracy. Deburring removes any parting line flash, ensuring clean, burr-free part surfaces.

Parts are loaded into computer-controlled furnaces for heat treatment processes including annealing and aging. Precise temperature cycles optimize the mechanical properties of aluminum alloy components.

Experienced foundry workers pour precisely measured molten metal into casting molds. Strict process control over pouring temperature and speed ensures consistent internal structure and minimal porosity.

Multi-axis CNC turning centers perform secondary machining operations to achieve critical tolerances on features such as bores, threads, and mating surfaces that require accuracy beyond casting capability.

Certified welders join metal components using MIG, TIG, or spot welding processes as required. Weld quality is monitored continuously to ensure full penetration and defect-free joints on every assembly.

Every part batch is inspected using CMM coordinate measuring machines, digital calipers, and optical comparators. Dimensional reports are generated and retained as quality records for full traceability.

Parts receive customer-specified surface finishing including powder coating, anodizing, shot blasting, or chrome plating. Automated spray systems ensure uniform coating thickness and consistent color.

Finished parts are individually wrapped in protective foam, packed in export-grade cartons, and labeled for shipment. Each package includes an inspection certificate and full shipping documentation.