Rubber & plastic sealing systems, solutions provider
The sealing partner vehicle makers rely on, focused on sealing systems since 1992. Sunroof, body, glass-run and molded seals, plus curtain-wall, wind-turbine and drain-pipe gaskets: in-house compounds, controlled processes, simultaneous engineering.
Five foundations built over thirty-plus years
Four markets, eight product families
Beyond the five automotive families, Hongyun supplies seals for building, equipment and energy, and municipal and industrial markets; all eight families share one compound, extrusion and molding system, with multi-family programmes handled by a single project team.
Sunroof Seals
Sealing profiles for small and panoramic sunroofs - clip-in, PU-edged, outer-sliding, inbuilt and full-roof types - developed to the sunroof system supplier's section and interface requirements.
Design, tooling, manufacturing and testing on a single site
Simultaneous engineering, in-house tooling, automatic batching, co-extrusion and three families of test equipment - every step from section review to production monitoring happens inside Hongyun.
Design & development
Design capability across EPDM, PVC and TPE sealing profiles, with simultaneous engineering and drawing-based development. 3D design in CATIA / UG, CAE analysis for insertion/extraction force and sealing performance, projects managed through the five APQP phases.
Tooling & manufacturing
Tooling is designed in-house, machined by wire EDM and maintained by dedicated fitters. Production runs on automatic batching, five rubber and one plastic co-extrusion lines, covering steel-carrier roll forming, hard-soft co-extrusion, flocking, coating, punching and tape application.
Test laboratory
Material, performance and environmental test equipment - rheometer, Mooney viscometer, tensile and abrasion testers, laser gauge, damp-heat, ozone, UV, xenon and salt-fog chambers - supporting sample validation and production monitoring.
Projects run on APQP, from brief to SOP in four stages
Concept, approval, sample qualification, pre-production and launch - each stage has defined inputs, outputs and review gates.
Application, section, material, volume and timing
3D design, CAE analysis, tooling and process plan
Samples, test reports and vehicle-level validation
PPAP, process control, traceability and improvement
Serving OEMs, sunroof systems and glass suppliers
More than twenty vehicle makers and sunroof and glass system suppliers, across more than twenty vehicle platforms, combustion and new-energy alike.
Vehicle OEMs
17
Sunroof & roof systems
7
Automotive glass
3
Door & component systems
2
