A low-stress warpage mold injection molding process for a new energy vehicle large-current connector
By employing a low-stress warpage mold injection molding process, the problem of warpage in high-current connectors for new energy vehicles using high-temperature nylon materials has been solved, achieving high product stability and long lifespan. Technologies such as pre-drying, high-temperature nylon materials, independent temperature-controlled zoned hot runner molds, multi-stage injection, and segmented cooling ensure efficient production and excellent performance of the products.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-05-25
- Publication Date
- 2026-07-17
AI Technical Summary
Traditional molds cannot effectively solve the warping problem of high-temperature nylon materials when manufacturing high-current connectors for new energy vehicles. This leads to warping, fiberglass orientation differences, and excessive internal stress in the products under high voltage, high current, and frequent thermal cycling, affecting the stability and lifespan of the products.
The low-stress warpage mold injection process is adopted, including pre-dried high-temperature nylon material, independent temperature-controlled zoned hot runner mold, multi-stage injection speed, segmented cooling and gradient holding pressure strategy, combined with fan-shaped gate and embedded conformal cooling water channel to ensure uniform cooling and minimize internal stress.
This achievement resulted in a warpage of less than 0.15 mm/100 mm and a residual stress of less than 30 nm/mm for high-current connectors used in new energy vehicles, improving the dimensional stability and service life of the product and preventing sealing failure and poor contact.