Injection Molding Engineer

PT. Jaya Refrigeration Equipment (Midea Washing Machine); Cikarang; On-site; IDR 180,000,000 - 300,000,000; Full time

Job summary

PT. Jaya Refrigeration Equipment (Midea Washing Machine) seeks an Injection Molding Engineer to optimize molding processes and ensure consistent product quality.

The role requires hands-on setup, mold changeovers, parameter tuning, and troubleshooting on the production floor. You will work with production, quality, tooling, and maintenance teams to reduce defects, improve efficiency, and support NPI and continuous improvement initiatives.

Qualifications

• Bachelor's degree in Mechanical Engineering or related field.
• 2–3 years of injection molding engineering or plastics experience.
• Hands-on injection molding machine setup and mold changeover.
• Ability to adjust process parameters and troubleshoot defects.
• Knowledge of Lean Manufacturing and 5S is a plus.

Responsibilities

• Perform hands-on setup and adjustment of injection molding machines, molds, and process parameters to meet production requirements.
• Conduct mold installation, mold changeover, machine start-up, and trial runs for new and existing products.
• Set and optimize process parameters including injection pressure, speed, temperature, holding pressure, and cooling time.
• Troubleshoot molding defects such as short shots, flash, sink marks, warpage, and other quality issues.
• Conduct mold trials, process validation, and parameter optimization to improve product quality and production efficiency.
• Analyze production issues and implement corrective and preventive actions to reduce defects, scrap, and downtime.
• Monitor cycle time, scrap rate, machine utilization, and process stability.
• Collaborate with Production, Quality, Tooling, and Maintenance teams to resolve issues and improve performance.
• Support new product introduction (NPI), mold installation, and continuous improvement activities.
• Develop and maintain work instructions, process parameter sheets, and technical documentation.
• Ensure compliance with manufacturing standards, safety, and 5S practices.

Job description

Responsible for optimizing injection molding processes, ensuring stable production and consistent product quality. This role requires strong engineering knowledge combined with hands‑on experience in injection molding machine setup, mold changeover, parameter adjustment, and troubleshooting.

Key Responsibilities

Perform hands‑on setup and adjustment of injection molding machines, molds, and process parameters to meet production requirements.

Conduct mold installation, mold changeover, machine start‑up, and trial runs for new and existing products.

Set and optimize process parameters, including injection pressure, injection speed, temperature, holding pressure, and cooling time.

Troubleshoot molding defects, including short shots, flash, sink marks, warpage, and other quality issues.

Conduct mold trials, process validation, and parameter optimization to improve product quality and production efficiency.

Analyze production issues and implement corrective and preventive actions to reduce defects, scrap, and downtime.

Monitor cycle time, scrap rate, machine utilization, and process stability.

Collaborate with Production, Quality, Tooling, and Maintenance teams to resolve technical issues and improve manufacturing performance.

Support new product introduction (NPI), mold installation, and continuous improvement activities.

Develop and maintain work instructions, process parameter sheets, and technical documentation.

Ensure compliance with manufacturing standards, safety requirements, and 5S practices.

Requirements

Bachelor's degree in Mechanical Engineering, Manufacturing Engineering, Industrial Engineering, or a related field.

Minimum 2–3 years of relevant experience in injection molding engineering or plastic manufacturing.

Must have hands‑on experience in setting up and adjusting injection molding machines, performing mold changeovers, and optimizing molding parameters.

Must be able to independently perform machine setup, conduct trial runs, and troubleshoot molding defects on the production floor.

Strong understanding of injection molding machines, mold structures, plastic materials, and molding processes.

Proven ability to troubleshoot process issues and improve product quality and production efficiency.

Experience in plastic component manufacturing for washing machines or other home appliances is preferred.

Knowledge of Lean Manufacturing, 5S, Six Sigma, or continuous improvement methodologies is an advantage.

Willing to work hands‑on in a factory environment and support production operations as required.

Strong analytical, problem‑solving, and communication skills.

Important: Candidates with purely theoretical, design, or process‑analysis experience without practical injection molding machine setting experience will not be prioritized.