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Processes & Materials

Injection Molding

Our domestic injection molding capabilities are fueled by the dedicated team at our HARBEC business. With more than 45 years of experience, we offer superior strength and product durability, fast production speeds, and the capacity to meet the need for high production volumes.

The process

What Is Injection Molding?

Injection molding refers to the process of shaping a material (usually thermoplastic) by injecting it into a mold. The material is processed to a molten state, at which point it’s injected into the mold under pressure. The mold remains closed, and the material is allowed to solidify and cool to the desired shape.

Injection molding is a versatile process and can be used to create a wide range of products, from toys and household goods to automotive parts and medical devices. One of the benefits of injection molding is that it can be used to create products with highly intricate features; in some cases, the only limit is the imagination of the designer. Additional key benefits include:

  • Precision and details: The injection molding process allows for a high degree of precision and detail, making it ideal for products that require intricate designs.
  • Repeatability: Injection molding produces parts that are identical to each other, making it easy to create large quantities of the same product.
  • Cost-effectiveness: Injection molding is a relatively fast and efficient process, which helps to keep component costs down.
  • Speed: Injection molding is a fast process, which means products can be created and delivered in a timely manner


With plastic, we can produce results in volume with remarkable certainty and economy. When creating repeatable products, injection molding machines can use pre-designed molds or those that meet specific specifications.

  • 2 Transfer molding machine
  • 26 Electric injection machines
    (clamping pressure range of 55 to 585 tons)
  • Scientific molding
  • SPC control
  • End of arm automation & vision system
  • Prototype to production quality molds

Quick-Turn Injection Molding

With quick-turn Injection Molding, you can explore a realm where creativity meets efficiency, enabling you to bring prototypes to life in record time. Discover the secrets of this cutting-edge manufacturing process, delve into the intricacies of design optimization, and witness how a single mold can generate countless possibilities.


Materials should be selected based on their properties, manufacturing characteristics, cosmetic appearance, and cost. We have 300 engineered thermoplastic grades of materials in-house:

  • ABS, Nylon, Polycarbonate, TPU
  • Bioresins: reclaimed, biodegradable
  • Chemical-resistant: Isoplast™
  • Filled: carbon, glass, metal, mineral
  • High-density: EcoMass™
  • High-heat: PEEK, Radel™, Stanyl™, Ultem™
  • Thermally-conductive: Electric and dielectric


Injection molding is used in several different industries to create parts, equipment, and other components. Injection molding is extremely versatile since it can be used to adjust molds to meet various manufacturing needs. Injection molding is utilized in a variety of industries, such as:

Aerospace & Defense

The aerospace, defense, and security industries are known for how quickly their technology evolves. Injection molding allows for the speedy production of various equipment frequently used by these industries. Among many other injection molded components, we can produce the following components for the aerospace, defense, and security industries:

  • Battery housings
  • Robotic components
  • Space components
  • Valve housings and covers
Electromagnetic Components

Due to their specialized nature, producing high-performance electromagnetic components can be a difficult task. Injection molding allows for the production of specialized and complex parts such as testing equipment related to retention force, continuity and impedance, and AC/DC HI-POT. This process can also be used to create custom electrical verification equipment. Our services include:

  • Solenoid manufacturing
  • Hand soldering
  • Pin crimping
  • Coil winding

Injection molding offers a way to produce important medical tools and devices at a low cost. We are able to produce components such as blood pressure cuffs and hoses, IV components, dialysis components, reagent closures, and spinal implants. Among many other injection molded components, we can create components for the following medical products:

  • Patient monitoring systems
  • Microfluidics
  • Orthopedics (Implants)
  • Robotics
  • Surgical Instrumentation


Our HARBEC company has a long history of making and maintaining high-precision production tooling, and lower-volume prototype tooling, to meet our customer’s needs.  Our fully equipped mold shop partnered with our engineering team can take your product from design to production. Our mold maintenance team is fully outfitted with its own CNC machine, Bridgeport, and manual lathe to perform tool repairs when needed, as well as ultrasonic cleaning and polishing equipment to keep tools running like new.  Our in-house micro laser welder also helps reduce downtime on tool repairs since we can keep the work in-house and turn around repairs in hours instead of days.

Cleanroom Production

ADDMAN’s quality process includes the most advanced technology and internal controls to ensure products meet all specifications. Our cleanrooms at our HARBEC facility are ISO Class 8 certified. In a controlled environment, the cleanroom offers customers high-quality, tight-tolerance, sustainable manufacturing solutions.


  • Laminar flow clean room
  • Daily particle monitoring
  • Optimized for production, & prototype, clean room molding
  • 55-400 ton electric injection molding machine options with a 1.95-38oz. shot size depending on the application
  • Cleanroom secondary services are offered based on customer requirements

Simplify Supply Chain with Value-Added Services

ADDMAN offers a range of in-house secondary operations that are necessary to meet specific appearance specifications, performance requirements, and dimensional tolerances that may not be achievable with plastic parts produced directly from an injection-molding press. These secondary operations include gate trimming, CNC-machining (such as drilling, reaming, and surfacing), annealing, and water treating.

ADDMAN provides top-quality assembly services across a wide range of applications, from simple part joining to the production of complex electro-mechanical devices. Our tool-making expertise allows us to design and build fixtures that minimize costs for our customers.

Additionally, we frequently produce all the necessary components for assemblies that require plastic and metal parts. Our skilled team of experts utilizes various assembly processes such as manual assembly, ultra-sonic and heat welding, heat staking, bonding, taping, and labeling to deliver high-quality finished products that meet our clients’ exacting standards.

ADDMAN’s decorating capabilities offer our clients the ability to achieve the desired cosmetic appearance or surface performance of their parts beyond what is achievable with natural plastic or metal finishes. Whether it’s the visual demands of consumer sporting goods or the electro-chemical requirements of industrial products, we have established subcontractor relationships for painting, plating, hot stamping, and pad printing. With our expertise and attention to detail, we ensure that the end result meets our clients’ exacting specifications.

ADDMAN provides comprehensive logistics services to complement our part and assembly manufacturing capabilities, including reusable packaging, kitting, inventory management, and distribution and fulfillment.

Our logistics services cover all aspects of the supply chain, from package design and shipment-return loop management to component manufacture and ordering, production planning, and order fulfillment.

By leveraging our expertise in logistics management, we ensure that our clients receive their parts and assemblies on time and in optimal condition.

Sustainable Innovation

Carbon-Neutral Production

The 120,000-square-foot injection molding facility operates three shifts, six days a week, and includes CNC machining and 3D printing capabilities. The use of energy-efficient equipment and green energy sources on-site reduces greenhouse gas emissions, minimizes our carbon footprint, and minimizes the impact on our natural resources. As a carbon-neutral facility since 2013, we provide a blueprint for a healthier future, proving it is possible to meet the needs of today without compromising the quality of tomorrow.

Together, we can speed up the innovation of tomorrow. Let's talk.

The only limitation is our own imagination for what we can jointly develop. And it all begins with your story.