injection molding service

Custom injection molding services for plastic prototypes and on-demand production parts. Get custom plastic molded prototypes and production parts in as few as Ten business days. Dozens of materials and finishes are available.

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Online Injection Molding Service for Custom Parts

Since 2006, RJC has set the standard for the custom plastic injection molding industry. We specialize in the manufacture and production of precision tolerance molds. Quality and customer service are our top priorities and 100% customer satisfaction is our goal. Our dedication to quality and our customers is what makes rjcmold a leading molding company.

RJCmold’s engineering design team can take your project from concept to design by supporting customers’ designs for manufacturability and mold flow analysis. RJCmold has a full-service tool room that can assist you with mold design, prototyping, and mold making. Our 50 state-of-the-art injection molding machines range from 28 tons to 610 tons, including 15 overmolding machines.

rjcmold custom injection molding services include the rapid delivery of prototype and low-volume production components. Because of our streamlined production processes, we typically deliver first articles in less than 13 business days, and for simple expedited projects in as little as five days.

Injection Molding Processes

Make the move from prototyping to on-demand manufacturing for affordable, high-quality molded parts within days. Better yet, your prototyping tool is free once you shift to an on-demand manufacturing tool. Working with a single supplier that provides free design consultation services also massively speeds up the manufacturing process, allowing for greater supply chain flexibility, more consistent parts, and making qualification a breeze.

Rjcmold Injection Molding Capabilities

Service Details
Lead Time Starts at 5 business days, including fast quote responses with design-for-manufacturing (DFM) feedback
Production Options Domestic and international
Materials Most plastics, including custom sourcing and matching; see materials list below
Machines Available Single, multi-cavity, and family molds; 50 to 1,100+ press tonnage; side actions including hand-loaded cores.
Inspection and Certification Options Includes FAI and PPAP. ISO 9001, AS9100, ISO 13485, UL, ITAR, and ISO 7 and 8 Medical Clean Room molding.
Tool Ownership Customer-owned with mold maintenance
Mold Cavity Tolerances +/- 0.005″ when machining the mold and an additional +/- 0.002″ per inch when calculating for shrink rate
Part to Part Repeatability +/- 0.004″ or less
Critical Feature Tolerances Tighter tolerances can be requested and may increase the cost of tooling because of additional sampling and grooming. Rjcmold will mill to a steel-safe condition on critical features.
Available Mold Types Steel and aluminum; Production grades range from Class 105, a prototype mold, to Class 101, an extremely high production mold. Rjcmold typically produces Class 104, 103, and 102 tools.

Benefits of our injection molding service

Using an injection molder to fulfill large orders provides an extensive range of advantages that can help us meet any project or demand you may have. These include:

  1. Using plastic injection mold allows for large volumes of uniform, complex parts, and geometries. Thus, enabling us to create intricate designs according to the needs of your industry.
  2. Injection molding plastic parts are compatible with various colors and materials. Currently, there are 25,000 engineered materials used for injection molds. These include resins, silicones, thermoplastics, and thermosets. With these compatibilities, we can find the right balance in terms of the right balance of physical, mechanical, and chemical properties.
  3. Plastic injection molds are very efficient as molding cycles typically take ten to 60 seconds only. The maximum would be 120 seconds for complex designs. So we can finish your orders fast.
  4. One of the primary benefits of an injection mold machine is its high repeatability and reliability. We can create thousands of parts before our machine needs maintenance.
  5. In general, injection molding creates less post-production waste compared to other forms of the manufacturing process. However, it still generates scraps. Fortunately, these scraps are reusable for other orders we may have.

Working with us means we will answer any questions you may have about injection molding. We’re one of the most trusted injection molding companies that will guide you through the process, so you understand how we can finish the project and deliver perfect results. No matter how large your orders may be, we’re ready to work with you to create an innovative design that fits your standards.

We’re your go-to plastic injection molding company for exceptional-quality parts

We’re one of the most trustworthy plastic injection molding companies you can go to for excellent plastic parts. We’re passionate about injection molding and continuously strive to enhance our capabilities. Plus, our state-of-the-art injection molding facility is equipped with the latest injection molding machines.
Contact us now for all your plastic part needs, whether it’s a complex or simple design. We’ll guide you through the process – from concept to completion.

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Why Choose RJCmold plastic injection mold Design and Manufacturing Service?

As a custom plastic injection molding service company in China, RJCmold offers precision and cheap plastic injection molding parts for low volume rapid prototyping.

RJCmold can offer Rapid Prototype parts with our plastic injection mold service and manufacturing services. For Rapid Tooling and low volume production, we develop a universal mold base in various sizes, feasible of running side actions, this will reduce the standard tooling cost and lead time by 30%.

Wherever you are, you will find a RJCmold partner ready to fulfill your expectations in terms of innovation, responsiveness, price, lead time, and quality.

RJCmold will deliver your parts fast with our tooling and molding solutions! RJCmold is able to provide you with low volume and production tools in different technologies to meet your needs.

Tools: SMC/BMC Molds, Multi Cavity Molds, Over-Moulding Tools, Aluminum die casting Molds

Capabilities: Injection Machine– 100+ sets, 140,0000+ parts made per month, Tool as fast as 3 weeks, Part as fast as 7 days

Class of Injection Molding Mold

At Rjcmold, we design and create precise custom injection molds from high-quality materials. Our processes ensure unmatched consistency and repeatability at fast lead times and affordable pricing. Every plastic injection molding we fabricate meets international standards. From one-off projects to small batches and production tooling, we provide durable and reliable mold tools.

Mold Class Purpose Shot Life Tolerance Lead Time
Class 105 Prototype Testing Under 500 cycles ±  0.02mm 7-10 days
Class 104 Low-volume Production Under 100.000 cycles ±  0.02mm 10-15 days
Class 103 Low-volume Production Under 500.000 cycles ±  0.02mm 10-15 days
Class 102 Medium-volume Production Medium to high production ±  0.02mm 10-15 days
Class 101 High-volume Production Over 1,000,000 cycles ±  0.02mm 10-18 days

Materials for Injection Molding

These are commonly molded plastics that our injection molding service provides. After knowing the basics of materials, like common grades, brands, advantages, and disadvantages, choose the right injection molding material depending on your application requirements.

Tooling Materials

Rigid Plastic Materials

Elastomer and Rubber Molded Materials

Tool Steel: P20, H13, S7, NAK80, S136, S136H, 718, 718H,  738 ABS (acrylonitrile butadiene styrene) EPDM (ethylene propylene diene monomer rubber (Viton))
Stainless Steel: 420, NAK80, S136, 316L, 316, 301, 303, 304 ASA (acrylonitrile styrene acrylate) PEBA (polyether block amide)
Aluminum: 6061, 5052, 7075 CA (cellulose acetate) PVC (polyvinyl chloride (Shore A))
HDPE (high-density polyethylene) TPE (thermoplastic elastomer)
LCP (liquid crystal polymer) TPU (thermoplastic polyurethane (Shore A))
LDPE (low-density polyethylene) TPV (thermoplastics elastomer, vulcanized rubber (Santoprene))
PA 6 (polyamide 6, nylon 6) LSR (liquid silicone rubber)
PA 6/6 (polyamide 6/6, nylon 6/6)
PARA (polyarylamide)
PBT (polybutylene terephthalate, Valox)
PBT-PET (polybutylene terephthalate-polyethylene terephthalate)
PC (polycarbonate)
PC-ABS (polycarbonate-acrylonitrile butadiene styrene)
PC-PBT (polycarbonate-polybutylene terephthalate, Xenoy)
PC-PET (polycarbonate-polyethylene terephthalate)
PCT (polycyclohexylenedimethylene terephthalate)
PE (polyethylene)
PEEK (polyether ether ketone)
PEI (polyetherimide, Ultem)
PE-PP (polyethylene-polypropylene)
PE-PS (polyethylene-polystyrene)
PES (polyethersulfone)
PET (polyethylene terephthalate, Rynite)
PLA (polylactic acid)
PMMA (polymethyl methacrylate, acrylic)
POM (acetal polyoxymethylene, Delrin)
PP (polypropylene)

Surface Finishes of Injection Molding

Injection molding includes injection mold tooling, plastic injection molding, and more. The surface treatment of the mold is usually completed during the production process. After the injection molding is completed, we will carry out certain surface treatments on the finished product as per your requirement.

Name Description Link
Glossy A grade finishes are made using a diamond buffing process and yield shiny and glossy surfaces on injection molded parts. Learn More>>
Semi-glossy B grade finishes use grit sandpaper to produce parts with a slightly rougher finish than grade A parts. Custom molded plastic parts that undergo B grade finishing have a matte surface texture. Learn More>>
Matte C grade finishes use grit sanding stones to produce a rough, uneven surface. Injection plastic parts that undergo C grade finishing have a matte surface texture. Learn More>>
Textured CD grade finishes use grit and dry glass beads or oxide to produce a very rough textured finish. Depending on the type of material used, products can have a satin or dull finish. Learn More>>

Our Injection Molding for Various Industrial Applications

RJCmold works with leading manufacturers from different industries to support growing demands and streamline their supply chain. The digitalization of our custom injection molding services helps more and more manufacturers bring their idea to products.

Injection Molded Parts Delivered In Days

Our advanced mold making process is exceptionally efficient due to our proprietary manufacturing concept and team of process experts.  Typically we are able to reduce the CAD to Injection Molded Part time by over 75% compared to traditional injection molding approaches.  The overwhelming majority of our customers receive their injection molded parts in 15 days or less.  To be clear, we produce molded parts using standard injection molding equipment with the resins our customers specify in two state of the art facilities in the United States.  There is no trick, we just work extremely efficiently.

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Injection Molding FAQ

What plastics can you use with injection molding?

Injection molding can use almost any type of plastic that can also be combined together. This unmatched versatility is what makes injection molding so popular and suitable for some of the most demanding industries in the world. You can check out our selection of available materials and finishes on this page.

What is the process behind injection molding?

The plastic pellets are melted and are then inserted in liquid form into the mold tool, where it cools and takes the required shape. The process allows for high precision and tight tolerances because it can be replicated exactly each time.

Why should I use injection molding?

Injection molding is one of the most affordable ways to manufacture large quantities of parts, especially for bigger production runs. Even though designing and creating the mold can take time, after that, the process becomes very affordable and efficient.

How quickly can you produce parts using injection molding?

Before production can begin, we will first need to design the injection mold tool. How long this takes will depend on the complexity of your project, but the usual timeline can be as short as a week and as long as a couple of months.