R&D Mechanical Engineer （Plastic Components）

该职位来源于猎聘 Area of Job Responsibility 工作职责范围 Responsible for mechanical development of plastic components and assemblies:

• Design, analyze and evaluate plastic components, housings and mechanical assemblies for metering pumps, sensors, transmitters and related industrial products.
• Develop mechanical structures according to defined technical requirements, including concept design, material selection, detailed design, tolerance definition, sealing design and design verification.
• Design plastic parts according to injection molding principles and ensure manufacturability, reliability, assembly efficiency and cost effectiveness.
• Select appropriate plastic materials according to mechanical load, chemical exposure, operating temperature, environmental conditions, dimensional stability, appearance and product lifetime requirements.
• Perform tolerance analysis and define critical dimensions and mechanical interfaces to ensure product assembly and functional performance.
• Work closely with tooling and injection molding suppliers for DFM analysis, mold design review, quotation evaluation, tooling development and technical issue resolution.
• Follow up tooling development from mold kickoff through T0/T1/T2 trials, sample evaluation, tooling modification and final acceptance.
• Analyze injection molding defects and dimensional issues together with suppliers and manufacturing teams, and drive corrective actions through product design or process optimization.
• Develop and optimize sealing and enclosure structures to meet product environmental and IP protection requirements where applicable.
• Define mechanical verification requirements and support prototype, engineering validation and design validation testing.
• Collaborate closely with Hardware, Electronics, Testing, Manufacturing, Quality, Purchasing and Product Management teams to define and align product interfaces and requirements.
• Support prototype builds, pilot production and successful transition of new products into serial production.
• Support production and customer field issue investigation, perform root-cause analysis and develop corrective design solutions when required.
• Drive product and component cost optimization through material selection, structural simplification, tooling optimization, part consolidation and supplier collaboration.
• Prepare and maintain mechanical engineering documentation, including 3D models, 2D drawings, tolerance specifications, BOM information, design calculations, verification documentation and technical reports.
• Participate in mechanical design reviews, FMEA and technical risk assessments throughout the product development process.
• Collaborate with global R&D teams and suppliers on technical topics related to plastic components, tooling and mechanical product development.
• Follow and implement other tasks assigned by the line manager. Required Education & Working Experience 教育背景及工作经验
• Bachelor’s degree or above in Mechanical Engineering, Polymer Materials Engineering, Mold Design, Manufacturing Engineering or a related field.
• Minimum 3 years of experience in mechanical product development, with strong hands-on experience in plastic part design and injection-molded products.
• Solid knowledge of plastic component design principles, including wall thickness, ribs, bosses, draft angles, undercuts, parting lines, snap-fits, screw joints, inserts and dimensional tolerances.
• Good understanding of commonly used engineering plastics and their properties, such as PP, PE, PA, PBT, PC, ABS and related reinforced materials.
• Experience in material selection considering mechanical strength, temperature, chemical resistance, dimensional stability, appearance and cost.
• Strong understanding of injection molding processes, mold structures and common molding defects, with the ability to identify root causes and propose design improvements.
• Experience in tooling development, including DFM review, mold design review, T0/T1 sample evaluation, tooling modification and final tooling acceptance.
• Experience in tolerance analysis, tolerance stack-up and design of mechanical interfaces.
• Experience with sealing structures, such as O-rings, gaskets, ultrasonic welding or other enclosure sealing concepts, is highly preferred.
• Experience in designing enclosures or mechanical components with IP protection requirements is preferred.
• Experience with Creo, SolidWorks or equivalent 3D CAD tools.
• Experience in product lifecycle development from concept design, prototyping and verification to tooling and serial production.
• Experience in pumps, industrial instrumentation, sensors, transmitters, fluid handling equipment or similar industrial products is preferred.