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What is Plastic
Injection Molding?

Injection Molding

Injection molding is a manufacturing process that consists of filling a metal mold cavity with liquid plastic resin, which then cools and forms a plastic part.

It's most often used for the manufacturing plastic parts at scale due to its low material waste and low cost per part. It’s an ideal manufacturing process for industries like medical devices, consumer products, and automotive.

Our plastic injection molding process produces custom prototypes and end-use production parts with lead times as fast as 1 day. We use aluminum molds that offer cost-efficient tooling and accelerated manufacturing cycles, and stock about 200 different thermoplastic resins.

How Does Plastic Injection Molding Work?

Injection Molding
Injection Molding
Injection Molding

The manufacturing process for molded parts is complex. Before your parts are even molded, we're there to help you with comprehensive manufacturability feedback and consultative design services, so you can avoid mold design pitfalls before the resin hits the mold. From there, our production process is documented and optimized using scientific molding so you get high-quality parts consistently and reliably with every production run.

Critical-to-quality (CTQ) dimensions you call out on models let us know what areas are most crucial to the success of your parts. Once the parts start molding, the process and samples are qualified using automated inline CMM technology, generating a detailed FAI and process capability study with no additional lead time.

Our thermoplastic injection molding is a standard process involving an aluminum mold with no heating or cooling lines running through it, which means cycle times are a bit longer. As part of the scientific molding process, our molders independently optimize and monitor fill speed, hold pressure, and hold time, and periodically inspect part quality and cosmetics. During the molding process, we use an automated inline CMM to ensure dimensional accuracy, as well as generate a detailed process capability study and FAI report.

Resin pellets are loaded into a barrel where they will eventually be melted, compressed, and injected into the mold’s runner system. Hot resin is shot into the mold cavity through the gates and the part is molded. Ejector pins facilitate removal of the part from the mold where it falls into a loading bin. When the run is complete, parts (or the initial sample run) are boxed and shipped shortly thereafter.

Plastic Injection Molding Service for You

Plastic Injection Molding Service for You

Injection molding is a cost-effective means of getting plastic parts in small and large batches. It is a repeatable process that ensures the delivery of several components with consistent quality. RapidDirect is a world-class plastic injection molding company offering the complete manufacturing solution for your project. With a commitment to customer satisfaction, our custom plastic injection molding services involve on-demand prototyping and production. Get plastic injection molding parts with superior quality, regardless of size and complexity.

Why Choose Us for Plastic Injection Molding Service

Our plastic injection molding process includes vital design considerations to improve moldability and enhance aesthetic appearance. RapidDirect delivers plastic injection molded parts of varying sizes and complexities. Our standard tolerances are defined by ISO 2768 standards, helping us meet tight tolerance requirements.

TIGHT TOLERANCE AND HIGH QUALITY

Our plastic injection molding process includes vital design considerations to improve moldability and enhance aesthetic appearance. RapidDirect delivers plastic injection molded parts of varying sizes and complexities. Our standard tolerances are defined by ISO 2768 standards, helping us meet tight tolerance requirements.

With certified domestic factories and a strong supply chain system, we accelerate the product development cycle and bridge the production of your injection molded parts as fast as possible.

HIGH EFFICIENCY

With certified domestic factories and a strong supply chain system, we accelerate the product development cycle and bridge the production of your injection molded parts as fast as possible.

Working with our experts having 10+ years of experience in the injection molding industry, efficiently complete a turnaround from prototyping to production.

INJECTION MOLDING SPECIALISTS

Working with our experts having 10+ years of experience in the injection molding industry, efficiently complete a turnaround from prototyping to production.

Injection molding materials

Injection molding uses a huge range of plastics, making it ideal for many applications across nearly every industry. we can source thousands of materials on request.

Acrylonitrile Butadiene Styren (ABS)

Acrylonitrile Butadiene Styren (ABS)

Polymethyl Methacrylate (PMMA)

Polycarbonate (PC)

Polycarbonate (PC)

Polyethylene (PE)

Polypropylene (PP)

Polypropylene (PP)

Polyamide 6 (PA6)

Polyether Ether Ketone (PEEK)

Polyether Ether Ketone (PEEK)

Polyoxymethylene (POM)

Injection molding surface finishes

SPI surface finishes:We offer any type of SPI surface finish, such as A-1, D-2 or D-3.

VDI surface finishes:VDI 3400 Surface Finish (commonly known as VDI surface finish) refers to the mold texture standard set by Verein Deutscher Ingenieure (VDI), the Society of German Engineers. This is mainly processed by EDM machining, producing fine to coarse matte finishes.

Injection molding surface finishes

High quality parts every time

QUALITY ASSURANCE

From factory audits to part inspections, we follow strict processes to ensure your parts always meet the highest quality standards.

QUALITY ASSURANCE

IP PROTECTION

We take every measure to ensure the protection of your IP, which is why 27% of Fortune 500 companies trust us with their projects.

IP PROTECTION

CERTIFICATIONS

Our manufacturing partners have all the necessary certifications for your project's needs (ISO 9001, ISO 14001, IATF 16949, ISO 27001).

CERTIFICATIONS

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