Injection Molder

Weld-On•Fontana, CA

1d•Onsite

About The Position

The Injection Molder is responsible for setting up, operating, troubleshooting, and optimizing injection molding machines and auxiliary equipment to ensure safe, efficient, and high-quality production. This position plays a critical role in maintaining process stability, reducing downtime, and supporting continuous improvement initiatives within the manufacturing operation.

Requirements

High School Diploma or GED required.
Minimum 2 years of hands-on experience in an injection molding manufacturing environment.
Strong working knowledge of injection molding machines, molds, and auxiliary equipment including dryers, loaders, chillers, conveyors, and robots.
Experience processing a variety of thermoplastic resins including PP, PE, ABS, PC, Nylon, and similar materials.
Proven ability to troubleshoot molding defects and optimize machine settings.
Ability to read and interpret work instructions, technical drawings, and product specifications.
Strong problem-solving, organizational, and communication skills.
Ability to work independently with minimal supervision.

Nice To Haves

Experience with mold maintenance and minor mold repairs.
Experience with automated manufacturing equipment and robotics.
Bilingual (English/Spanish) preferred.

Responsibilities

Set up, start up, and monitor injection molding machines and auxiliary equipment to meet production and quality requirements.
Perform mold changes, machine adjustments, and process parameter modifications as required.
Troubleshoot molding defects including flash, short shots, sink marks, warpage, burn marks, and dimensional inconsistencies.
Optimize processing conditions to improve cycle times, reduce scrap, and maximize machine efficiency.
Ensure molds, equipment, and tooling are properly maintained and operating effectively.
Conduct routine machine inspections and identify maintenance needs before equipment failures occur.
Verify product quality through visual inspections and basic dimensional checks in accordance with specifications.
Support production operators by providing technical assistance and process guidance.
Maintain accurate production and process documentation.
Monitor raw material usage and ensure proper material handling, drying, and storage procedures.
Collaborate with Quality, Engineering, and Maintenance teams to resolve production and quality issues.
Follow all safety procedures, including lockout/tagout requirements, PPE guidelines, and company policies.
Participate in Lean Manufacturing, 5S, and continuous improvement initiatives.
Maintain a clean, organized, and safe work environment.