Plastics Mechanical Engineer

Pexco Custom Plastics; Cincinnati (OH); On-site; USD 85,000 - 110,000; Full time

Job summary

Pexco Custom Plastics is seeking a Plastics Engineer to lead development, optimization, and validation of precision injection molding processes for medical, aerospace, defense, and industrial applications.

You will combine scientific molding, mold design, Moldflow simulation, metrology, automation, and NPI to ensure world-class quality and dimensional performance. Must have 3+ years in injection molding and hold a relevant engineering degree.

Qualifications

• Bachelor's degree in Plastics, Mechanical, Manufacturing, or related field.
• 3+ years of injection molding and mold design.
• Strong understanding of scientific molding and process optimization.

Responsibilities

• Develop and optimize precision injection molding processes for tight tolerances.
• Lead IQ/OQ/PQ validations, DOE studies, and process window development.
• Troubleshoot molding defects and implement corrective actions using data-driven methods.
• Support NPI from concept through production launch.
• Perform mold design reviews and provide DFM recommendations.
• Utilize Moldflow for fill, pack, cooling, shrinkage, and warp analyses.
• Use CMMs, optical inspection, and industrial CT for metrology validation.
• Establish SPC, MSA, gage R&R, and Cp/Cpk analyses.
• Collaborate with tooling, automation, quality, production, and customers.

Skills

Analytical thinking

Problem solving

Attention to detail

Team collaboration

Education

Bachelor's degree in Plastics Eng

Tools

Moldflow

CMMs

Optical inspection systems

Industrial CT scanners

Job description

JOB SUMMARYPlastics Engineer to lead the development, optimization, validation, and continuous improvement of precision injection molding processes for demanding medical, aerospace, defense, and industrial applications. This role combines scientific molding, mold design, Moldflow simulation, advanced metrology, automation, and new product introduction activities to ensure world-class quality, dimensional performance, and manufacturing excellence.RESPONSIBILITIESDevelop and optimize injection molding processes for precision plastic components with tight-tolerance requirements.Lead process validations including IQ/OQ/PQ activities, DOE studies, and process window development.Troubleshoot molding defects and implement corrective actions using data-driven methodologies.Support new product introductions from concept through production launch.Conduct mold design reviews and provide Design for Manufacturability (DFM) recommendations.Utilize Moldflow simulation tools to perform fill, pack, cooling, shrinkage, and warp analyses.Recommend improvements to gating, runner, cooling, venting, and ejection systems.Utilize advanced metrology systems including CMMs, optical inspection systems, and industrial CT scanners to validate part geometry and dimensional capability.Perform root cause analysis of dimensional variation through metrology data and statistical methods.Establish SPC, MSA (Measurement Systems Analysis), Gage R&R, and capability studies (Cp/Cpk).Collaborate with tooling, automation, quality, production, and customer teams.Evaluate and implement new manufacturing technologies, software platforms, and engineering tools.Other duties as assigned.QUALIFICATIONSBachelor's degree in Plastics Engineering, Mechanical Engineering, Manufacturing Engineering, or related field.3+ years of injection molding and mold design.Strong understanding of scientific molding principles and process optimization.Experience with dimensional metrology and quality systems.Strong analytical and problem-solving abilities.Experience in medical device, aerospace, defense, or other regulated manufacturing environments.Moldflow experience including fill, cooling, pack, shrinkage, and warp analysis.Experience with mold design, DFM, and tool qualification.Hands-on experience with CMMs, optical measurement systems, and industrial CT scanners.Knowledge of GD&T, tolerance stack-up analysis, MSA, SPC, and capability analysis.Experience with automation systems, robotics, and vision inspection technologies.Experience with high-performance polymers including PEEK, PPS, PEI, PFA, FEP, ETFE, and LCP.You should be proficient in:Injection MoldingScientific MoldingMachines & technologies you'll use:Injection Molding MachineCMMOptical Inspection Systems