Custom Injection Molding

Custom Plastic Injection Molding

Our rich experience as a USA plastic injection molding company includes production capabilities for many different industries, plastic materials, and specialty add-ons for your custom plastic parts.

Our focus is on production runs of 100 to 100,000 units per order. We know every custom injection molding project is different, but every MSI Mold customer enjoys our key values:

  • High quality custom plastic injection molds and custom parts with reliable on-time deliveries
  • Outstanding attention to customer needs through advanced quality planning
  • Fast quotes and delay free communication
  • Friendly and knowledgeable customer service

Injection Molding Projects Start With A Mold

Receiving high-quality injection molded parts starts with a quality built mold. Molds for plastic injection require a significant investment so we’ll work with you every step of the way to ensure you’re familiar with the different types of molds that are available for your project. We’ll make sure you’re completely informed before you invest in your tooling. Below we provide you with a valuable understanding of basic injection mold construction types and the benefits of each.

What Is a Custom Plastic Mold?

A custom plastic mold is a specialized and unique piece of tooling that’s used during the injection molding process to manufacture a specific product to meet customer requirements. If you need to manufacture hundreds or thousands of quality custom plastic parts, making a plastic mold that meets your exact requirements for part quality, manufacturing demand, and product pricing is essential.
Building your custom mold is the first step in your injection molding supplier's process. A quality-built mold demands highly skilled people and high-tech machinery and software. Our mold design and injection molding experts work with you each step of the way to ensure you receive a top-quality mold that meets the specific requirements that are unique to the part you need manufactured.

Plastic Injection Molding Challenges

Two of the biggest challenges with plastic injection molding projects are the cost and lead time. At MSI Mold, we overcome these challenges by building all injection molds in-house. We have also developed rapid tooling systems that reduce costs and improve lead times without sacrificing quality.

Having your mold and injection molded parts made in the United States can offer consistent quality and lower overall costs. Modern USA plastic injection molding companies use high-tech equipment and offer reliable technical expertise. In addition, if you source your project to a reputable USA injection molding supplier they will consistently use high-quality materials unlike many offshore suppliers.

When you source injection molding suppliers in the USA, you significantly lower transportation expenses and have readily available access to customer service and communication. Interaction with our injection molding experts throughout the process ensures a seamless sourcing experience production of the best possible molded plastic parts.

Injection Molding Process

Plastic injection molding requires three primary components – an injection molding machine, a mold, and raw plastic material. Molds for plastic injection consist of high strength aluminum and steel components that have been machined to operate in two halves. The mold halves come together inside the molding machine to form your custom plastic part.

The machine injects molten plastic into the mold, where it solidifies to become the final product. The injection molding process is actually a complex process with many variables of speed, time, temperatures and pressures. The complete process cycle for making each custom part can range from no more than a few seconds to several minutes. Below we offer you a very brief explanation of four steps of the molding process.

Tooling & Part Costs

Target Cost Planning for Custom Injection Molding

The cost of custom plastic injection molding projects for long-term production varies greatly. Simple mold tooling may range anywhere from $3,000 to $10,000. More complex, multi-cavity or high-production injection molds cost significantly more, from tens of thousands to hundreds of thousands of dollars. As explained in our cost relationship graph below, there is an inverse relationship between tooling costs and production part costs. Calculating the total cost for tooling and injection molded part prices involves assessing many factors, such as:

Selecting A Plastic Material For Your Parts

There is a wide variety of plastic material options for custom injection molding. It is most helpful for product engineers and designers to focus on the functional utility and working environment of their parts when selecting a plastic material. Talk to your injection molding supplier about these to help narrow down the right plastic material family for your custom injection molding project.

At MSI Mold we are happy to provide consultation to help customers find the right plastic material choice for their custom molded parts.

Common Plastics Used For Injection Molding

We use many thermoplastic materials for your custom plastic part needs. Many of the plastics listed here are always in stock and ready for production. If your product needs a custom color we can help!
Acrylonitrile Butadiene Styrene
Acrylonitrile Styrene Acrylate
High Density Polyethylene
Low Density Polyethylene
PA 6
Nylon Type 6, Aliphatic Polyamide
PA 66
Nylon Type 66, Aliphatic Polyamide
Polycarbonate + Acrylonitrile Butadiene Styrene
Acetal, Polyoxymethylene
Thermoplastic Elastomer
Thermoplastic Polyolefin
Thermoplastic Polyurethane

Equipment We Use

As a reputable plastic molding company, MSI Mold uses a variety of technologies for designing and manufacturing molds and custom plastic parts, including but not limited to:

Modern CAD Software

Computer-aided design software allows the manufacturer to take a simple 2D drawing and create an optimized 3D CAD model for your custom parts and injection molds. Our knowledgeable and friendly injection molding experts put their expertise to work with high-tech design and simulation software. We always use the latest software technologies available to reduce lead times, unexpected quality problems, and overall costs for our customers.

In-House Mold Manufacturing

In-house mold manufacturing is a very important capability for injection molding companies to have. Manufacturers and buyers searching for injection molding suppliers can benefit greatly on tooling cost, lead times, and single source responsibility for overall quality by only working with suppliers that manufacture customer molds in-house and in the USA.

At MSI we have a full-service mold manufacturing area inside our facility. We control every step of our customer mold builds to prevent loss of time and unexpected quality problems.

All-Electric Servo Injection Molding Machines

At MSI Mold, all of our injection molding machinery is modern all-electric servo driven. That means our machines use 50-70% less energy than traditional hydraulic pump motor driven molding machinery of the past. We are proud to say that in addition to being environmentally and workplace cleaner, our machinery is the most precise and repeatable that is available in our industry.

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