Injection Molding Technician – LSR (Liquid Silicone Rubber)

Department: Mold Processing/Changing (604)

Employment Type: Full Time

Location: Charlestown, NH

Description

We are seeking motivated Injection Molding Technicians to support our LSR (Liquid Silicone Rubber) molding operations in a high-volume manufacturing environment. This position will primarily focus on LSR processing, troubleshooting, automation support, mold changes, startups, Machine Maintenance, and maintaining production efficiency while meeting safety and quality standards.

Experience levels range from entry-level candidates willing to learn to advanced technicians with LSR processing and automation experience.

Key Responsibilities

Perform mold changes safely and efficiently
Start up, shut down, and troubleshoot LSR molding machines
Set up and maintain LSR pumps, mixers, and feed systems
Monitor and adjust LSR mix ratios and material delivery systems
Troubleshoot molding defects including flash, short shots, air traps, cure issues, and material inconsistencies
Support automation systems, robots, and EOAT setups
Maintain process parameters and document process changes
Follow setup sheets and standard processing procedures
Work with tooling, engineering, and production teams to improve processes
Maintain clean work areas and follow contamination prevention procedures for silicone materials
Follow all safety and lockout/tagout procedures

Skills, Knowledge and Expertise

Mechanical aptitude required
Manufacturing experience preferred
Injection molding or LSR experience preferred but not required for entry-level candidates
Ability to troubleshoot mechanical and process-related issues
Strong communication and teamwork skills
Ability to work in a fast-paced manufacturing environment
Willingness to work overtime as needed

Preferred Qualifications:

Experience with Liquid Silicone Rubber (LSR) molding
Understanding of LSR curing, venting, and flow characteristics
Experience with LSR pumps, mixers, and dosing systems
Experience with automation and robotics
Scientific molding knowledge
RJG or AIM training/certifications

Key Responsibilities

Skills, Knowledge and Expertise

Preferred Qualifications:

About Whelen Engineering