injection molding parts

3ERP Plastic Injection Molding

Test and mass produce plastic parts in as little as 15 days.
From 1 to 100+ Plastic Parts. Delivering Worldwide.

Start With A Free Project Review

See why our customers love us

The parts for the nylon plastic clips have been working very good so far. We have had the product in production for about 3 months now and have not found any issues.
I am introducing you now to our partner, Jay. He is CC’d on this email. He will be ordering the parts from you directly with the next order.
Also, I think we did about 125,000 units with this tooling so far. How many more units do you expect we can run before needing another tooling?

David CEO - 3ERP Client

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The 3erp Plastic Injection Molding Process

After successfully completing [total number] of productions for [total number] of clients in various industries, we have mastered our process for consistently delivering top-quality results under various timelines and material requirements using our plastic injection molding technology.

1. Project Review & Consulting
We go over your project and understand what you are trying to accomplish. We will listen to your insights and give our own suggestions based on our experience. Knowing the possibilities is crucial to achieving the best results.

2. Design, Materials, & Manufacturing
We begin the manufacturing process. We’ll select the best materials based on your required qualities. Then, we will mix them in a barrel where a reciprocating screw can melt the material and feed it into a split mold.

3. Molding Your Prototypes
We will inject the melted liquid material into your prototype mold cavity at high pressure, forcing it inside all the cavities in the mold while it remains hot and only solidify it after it takes the shape of the mold.

4. Begin Mass Production
If you’re happy with the results, our process makes it easy to quickly mass produce industrial parts and components. We can also manufacture products with multiple materials using our state-of-the-art repeated injection methods.

Addition Injection Molding Options

Besides the basic injection molding services, we also offer two variants on the process - overmolding and insert molding. Both of these can be useful in specific situations.



Overmolding uses injection molding to create a part from multiple materials. This process adds an injection-molded layer of material over an existing injection-molded workpiece. The overmolding process produces chemically bonded parts made using multiple materials.

The overmolding method is often cheaper and more effective than other manufacturing approaches that require creating and assembling component material parts separately. The process can also be used to build layered parts from scratch or to add a resistant outer layer to existing plastic parts and tools, providing a more rugged exterior. 

Toothbrushes consisting of a solid plastic body and rubberized grip are a common example of an overmolded product.


Insert Molding

Insert molding is similar to overmolding, but the substrate is not necessarily plastic and does not have to be produced via injection molding. For example, insert molding can be used to add a plastic coating to a pre-fabricated metal part.

Common parts made by insert molding include sharp handheld tools, such as scalpels, which consist of a metal blade partially housed within a plastic handle. Insert molding is also frequently used to create products that incorporate bushings, clips, and fasteners.

3erp Plastic Injection Materials

We use injection molding in tandem with our rapid tooling capabilities, allowing us to create detailed custom parts quickly and efficiently.
Our experienced team produces products of the highest quality using a wide range materials for any industry or application. Below are some of the options you can choose from.

Available Plastic Injection Materials at 3erp:

  • Acetal polyoxymethylene (POM)
  • Acrylonitrile butadiene styrene (ABS)
  • Nylon 66 (PA66) Glass-filled, polyamide (PA-GF)
  • High-density polyethylene (HDPE)
  • Low-density polyethylene (LDPE)
  • Polybutylene terephthalate (PBT)
  • Polycarbonate (PC)
  • Glass-filled polycarbonate (PC-GF)
  • ABS polycarbonate (PC-ABS)
  • Polyethylene terephthalate (PET)
  • Polymethyl methacrylate (acrylic) (PMMA)
  • Polyphenylene sulfide (PPS)
  • Polypropylene (PP)
  • Polystyrene (PS)
  • Polystyrene + polyphenyl ethers (PS-PPE)
  • Thermoplastic elastomer (TPE)
  • Thermoplastic vulcanizates (TPV)

material injection molding

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Finishing Options

  • Polishing
  • Pad printing
  • Silk screening
  • Custom color painting
  • Laser finishing
  • Heat staking
  • Texture finishing

Common Applications for Plastic Injection Molding

Plastic Injection molding is used to manufacture parts for a number of industries, including:

  • Medical devices
  • Automotive
  • Aerospace
  • Electronic
  • Packaging
  • Food containers
  • Toys
  • Plastic prototypes

Why choose 3erp plastic injection molding services?

Quickly test out the market with low-volume parts and then create large quantities of production-grade, high quality prototype molds.

 Faster Testing & Production

Faster Testing & Production

We offer quick turnaround times as fast as 15 days or more for your prototypes. Perfect for testing functionality or manufacturability before investing in mass manufacturing.

 Experienced Engineers

Experienced Engineers

After handling thousands of projects, our mold engineers have the experience to determine the right parameters immediately, no matter what type of parts they come across.

 Advanced Facilities

Advanced Facilities

We use imported and top brand local injection molds in order to make the most precise and high quality molding in as little time and cost as possible.

 Unlimited Capacity

Unlimited Capacity

Access a full range of other facilities from our network partners without any interruptions. Injection machines from 10 tons to 1000 tons are ready for your orders as needed.

 Affordable Durability

Affordable Durability

Whether it's for rapid tooling, mass production tools, or end-use plastic moulds, we will work to provide the best solution for you that is cost effective while still providing tight tolerances.

Shipped Icon Rapid Delivery

Rapid Delivery

Whether you need a few samples or mass production, our global delivery will give you high quality products and customer service in as little as 15 days, without breaking the bank.

Plastic Injection Molding FAQs

What plastics can you use with plastic injection molding?

Plastic Injection molding can use and combine almost any type of plastic material. This unmatched versatility makes it so popular and suitable for some of the most demanding industries in the world. Try our selection of available materials and finishes on this page.

What is the process behind plastic injection molding?

The plastic pellets are melted and then poured in liquid form into the molding tool, which cools and assumes the right shape. Because it can be replicated exactly each time, the process allows for precision and tight tolerances.

Why should I use plastic injection molding?

Injection molding is one of the most affordable ways to manufacture large quantities of parts, especially for bigger production runs. Once we’ve taken the time to design and create your custom mold, everything else becomes efficient.

How quickly can you produce parts using plastic injection molding?

It can take from as little as a week to a couple of months, depending on the complexity of your product design. First, we need to design the injection mold tool based on your requirements. Once that’s done, everything else is a rapid, streamlined process.