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Plastic Injection Mold Jobs in Missouri (NOW HIRING)

LFP Associates

Operations Manager

Kansas City, MO

The Operation Manager is responsible for leading all day-to-day manufacturing operations with an plastic injection molding facility, ensuring safety, quality, delivery, and cost objectives are met.

Advastar, Inc

Molding Technician

Kansas City, MO · On-site

$27 - $35/hr

... mold technician, plastic molding, injection mold, auxiliary equipment, overhead crane, valve gate, hot runner, cooling system, robot setup, 5S, LOTO, lockout tagout, line clearance, color change ...

Advastar, Inc

Molding Technician

Kansas City, MO · On-site

$27 - $35/hr

... mold technician, plastic molding, injection mold, auxiliary equipment, overhead crane, valve gate, hot runner, cooling system, robot setup, 5S, LOTO, lockout tagout, line clearance, color change ...

Advastar, Inc

Molding Technician

Kansas City, MO

$27 - $35/hr

... mold technician, plastic molding, injection mold, auxiliary equipment, overhead crane, valve gate, hot runner, cooling system, robot setup, 5S, LOTO, lockout tagout, line clearance, color change ...

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Plastic Injection Mold information

What is a plastic injection mold?

Plastic injection molds are specialized tools used in the injection molding process to shape molten plastic into specific forms and parts. They are typically made from durable metals like steel or aluminum and are designed to withstand high pressures and temperatures. The mold consists of two main halves that come together to form a cavity, which is then filled with melted plastic and cooled to produce the final product. Injection molds are commonly used in mass manufacturing of plastic components for industries such as automotive, consumer goods, and electronics.

What are the key skills and qualifications needed to thrive as a plastic injection mold technician?

To thrive as a Plastic Injection Mold Technician, you need a strong understanding of manufacturing processes, mechanical aptitude, and experience with mold setup and maintenance, often supported by technical training or an associate degree. Familiarity with CNC machines, injection molding equipment, and quality control systems, as well as certifications like RJG or Paulson, is highly beneficial. Attention to detail, problem-solving, and teamwork are crucial soft skills for addressing production challenges and ensuring consistent quality. These skills and qualifications are essential for maintaining efficient production, minimizing defects, and meeting safety and quality standards in a manufacturing environment.

What are some common challenges faced by plastic injection mold technicians on the job?

Plastic injection mold technicians often encounter challenges related to maintaining precise quality standards, troubleshooting equipment malfunctions, and minimizing production downtime. Adjusting machine settings to accommodate different mold designs and materials can require strong attention to detail and problem-solving skills. Additionally, technicians frequently collaborate with engineers and production teams to resolve defects and optimize manufacturing processes, making communication skills important for success in this role.

What is the difference between Plastic Injection Mold vs Plastic Mold Technician?

AspectPlastic Injection MoldPlastic Mold Technician
Primary RoleDesign, develop, and manufacture plastic molds for injection molding processesOperate, troubleshoot, and maintain plastic molds during production
Required SkillsCAD design, mold fabrication, material selectionMachine operation, mold setup, troubleshooting
Work EnvironmentManufacturing plants, mold shopsInjection molding facilities, production lines
CertificationsOften requires technical certifications in mold design or manufacturingMachine operation certifications, safety training

While a Plastic Injection Mold focuses on designing and creating molds, a Plastic Mold Technician operates and maintains these molds during production. Both roles are essential in the injection molding industry, with overlapping skills but distinct responsibilities.

What are popular job titles related to Plastic Injection Mold jobs in Missouri?

For Plastic Injection Mold jobs in Missouri, the most frequently searched job titles are:

What job categories do people searching Plastic Injection Mold jobs in Missouri look for?

The top searched job categories for Plastic Injection Mold jobs in Missouri are:

What cities in Missouri are hiring for Plastic Injection Mold jobs?

Cities in Missouri with the most Plastic Injection Mold job openings:

Plastic Injection Mold jobs near you
Infographic showing various Plastic Injection Mold job openings in Missouri as of August 2026, with employment types broken down into 100% Full Time. Highlights an 100% In-person job distribution.

Plastic Injection Molding Process Technician

O Fallon, MO • On-site

Permian Plastics LLC
Plastics Product Manufacturing • 51 - 200 employees
Learn more about Permian Plastics LLCexternal

$23.10 - $30.96/hr

Full-time

Posted yesterday

New

Job description

Description:

Permian Plastics is seeking a Plastic Injection Process Technician to support our injection molding operations in O’Fallon, Missouri. This position is responsible for maintaining stable, efficient molding processes while troubleshooting production issues, improving process performance, and supporting the safe production of quality parts.


Key Responsibilities:

  • Set up, start up, monitor, and adjust injection molding processes to maintain quality, efficiency, and consistent production.
  • Troubleshoot molding defects, process variation, equipment concerns, and production interruptions.
  • Sample new molds and assist in identifying process or tooling refinements necessary to achieve production requirements.
  • Monitor cycle times, scrap rates, and overall process performance and recommend improvements when targets are not being achieved.
  • Optimize molding processes to improve efficiency, reduce scrap, and support production goals.
  • Document optimized processes and maintain accurate process and set-up information, including mold temperatures, water configurations, hot sprue settings, nozzle information, ejector settings, and common processing issues and solutions.
  • Identify tooling, maintenance, material, or equipment concerns and communicate or submit appropriate work requests when issues are identified.
  • Work closely with Production, Quality, Maintenance, and Tooling to resolve manufacturing issues.
  • Provide processing expertise, technical guidance, and support to production employees and leadership.
  • Follow and support all company safety, quality, and operating standards.
  • Identify opportunities for improved equipment, technology, processes, safety, efficiency, and cost reduction.
  • Maintain tools and work areas in a safe and organized condition.
  • As an individual contributor, provide operational guidance and backup support for shift supervision when coverage is needed.
  • Perform other duties as assigned.
Requirements:
  •  Minimum of 2 years of experience in plastic injection molding or equivalent demonstrated injection molding experience and technical capability.
  • Working knowledge of injection molding processes, materials, molds, and related production equipment.
  • Ability to troubleshoot molding defects and identify appropriate processing adjustments.
  • Strong mechanical aptitude and problem-solving skills.
  • Ability to read, follow, and accurately document process parameters and production requirements.
  • Ability to work independently and collaborate effectively with Production, Quality, Maintenance, Tooling, and leadership.
  • Ability to work in a fast-paced manufacturing environment and respond effectively to changing production priorities.
  • Forklift certification or ability to obtain certification.
  • Ability to meet the physical requirements of the position, including prolonged standing and walking and working with hands and tools above shoulder height.
  • Steel-toe safety shoes or boots are required.

Schedule & Compensation:

Multiple shifts are available.

Pay range: $23.10–$30.96 per hour,(plus shift differential compensation), with starting pay based on relevant injection molding experience, demonstrated technical capability, and qualifications.