Injection Molding Manufacturers and Companies

IQS Directory is a top industrial directory listing of leading industrial injection molding companies and suppliers. Access our comprehensive index to review and source injection molding companies with preview ads and detailed product descriptions. These injection molding companies can design, engineer and provide injection molding for your specifications and application need. A quick and easy to use request for quote form is provided for you to contact these injection molding companies and suppliers. Each company has detailed profile information, locations, phone number, website links, product videos and product information defined. Read customer reviews and product specific news articles. We are the right resource for your information requirement whether its for a manufacturer of large injection molding, custom injection molding, foam injection molding.

  • Denver, CO

    LTM Plastics is Denver's premium injection molder, serving up quality since 1977. At LTM, you can expect consistent results, transparency and meaningful collaboration. We talk with our customers to determine their needs and then build our processes to deliver the highest quality parts quickly. We have experience but we’re not beholden to the “old ways” of doing things. It’s all about finding the right solution for the situation. Call today and see if we're the right partner for your next project.

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  • Fenton, MO

    As one of the Midwest’s oldest plastic molders, Koller-Craft has craftsmanship built into its name. We take pride in our quality injection molding work. Large to small parts, short to long runs. Excelling at product design, prototyping, close tolerance molding, insert molding & secondary services.

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  • Pomona, CA

    Performance Engineered Products, Inc. is a dynamic and innovative company, and we pride ourselves on being at the forefront of the injection molded plastics industry. With a rich history dating back to 1981, we have consistently demonstrated our commitment to excellence in both products and services.

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  • Stuart, FL

    Injection molding is what we do, and we do it well. For nearly 30 years, we have continued to offer nothing but the best in injection plastic molding. We believe in offering the best to customers, including technology, equipment, service, and prices. Find out more by visiting us online or giving us a call today!

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  • Riverside, CA

    Hi-Rel Plastics & Molding, Inc. offers injection molding for a variety of industries. We can process an almost infinite variety of thermoplastic resins, our prices are competitive, our delivery is on time, and we provide superior customer service. Value-added services include label application, assembly services, and custom packaging and shipping. Our team has the knowledge and expertise to develop the perfect solution. We areISO 9001:2015, AS 9100 Rev D, 13485:2016 Certified.

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  • Tempe, AZ

    A leader in the plastic processing industry for over 70 years, Aptyx provides a range of manufacturing services including injection, blow and dip molding, extrusion, and assembly. Within injection molding we are deeply experienced in complex processes such as over molding, two-shot molding and insert molding. With a focus on delivering high-quality product and exceptional customer service, you can count on us. Reach out for a competitive quote today.

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  • Valencia, CA

    Valencia Plastics is your leading full-service injection molded plastics manufacturer. Our products are made with various materials, including urethane, polyurethane, nylon, acrylic, and polycarbonate. We offer a wide range of sizes from miniature items up to 7 lbs. large parts. We are ISO 9001:2015 compliant. Industries we serve include electrical, military, automotive, aerospace, and agricultural.

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  • Bristol, PA

    Abtec, Inc. is a manufacturer of injection molded thermoplastics for high-tech OEMs. Since 1981, we have provided quality injection molded plastics and engineering services to such industries as automotive, aerospace, dental, electronics, food handling, nuclear, reprographics and more. Our 21,000 square feet building operates 24-hours a day, 5 days a week. Contact us today!

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  • Strongsville, OH

    You won’t find better quality injection molded plastics anywhere else in the industry. We have built ourselves up from a small manufacturing company to a large company with decades of experience. We can provide effective, efficient, and affordable solutions that will help you meet your goals and get the job done right. Contact us to learn more today!

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Injection Molding Industry Information

Injection Molding

Roughly 32% of all plastic processing applications utilize injection molding. Injection molding is the most common plastic processing method today; it enables manufacturers to fabricate plastic products in configurations that vary in complexity.

Quick links to Injection Molding Information

Applications of Injection Molding

In almost every industrial or consumer industry, injection molded parts are used to some extent.

The injection molding process can be used to fabricate items such as:

  • Automotive Parts
  • Computer Parts
  • Medical Equipment
  • Toys
  • Tools
  • Office Supplies
  • Screwdriver Handles
  • Video Game Cartridges
  • Mop Buckets
  • Monitors
  • Contact Lens Containers
  • Catheters

Materials Commonly Used in Injection Molding

Thermoplastic is the most common material used for the injection molding process. However, elastomers, biodegradable plastics, and thermosets can also be used. More specifically, materials that can be used for injection molding include ABS, polycarbonate, and polypropylene. Some materials are more expensive than others. To keep costs low, manufacturers may find an alternative type of plastic for the fabrication process.

Process of Injection Molding

The injection molding process remains the same regardless of which machine is ultimately used. In the first step, the barrel section of the machine is heated. The next step involves placing the pellets, or granules, into a hopper. Inside the hopper, a screw mechanism forces the granules into the heated barrel, where the granules are melted down. The molten plastic is injected into a split die chamber mold cavity. Once the cavity is full, it is clamped shut. Additional fluids, such as water, circulate through the mold’s cooling system and remove the heat. The part is held in the mold under a high amount of pressure until it completely hardens. Finally, upon the solidification of the part, it is extracted from the mold.

Hydraulic oil machines are the most common type of injection molding. These machines use hydraulic fluids to propel the mold through the machine. Toggle injection molding comes in at a close second in terms of popularity, Toggle injection molding machines move the mold through the machine using mechanical links. In recent years, hybrid hydraulic and toggle machines have emerged into the injection molding industry and are increasing in popularity due to their ability to eliminate the problems that the other machines may have, such as rapid wear and tear of the equipment, as well as slow processing rates for parts.

Rapid injection molding is another process that can be utilized. It is the same as normal injection molding, using the same materials and the same type of molds, but it is quicker and has a lower production cost. Because the molds go through the process at a much quicker rate, they need to be of the utmost quality. In the early stages of developing a new product, a company will need to develop a prototype before production of that item can begin. Alternatively, they may request that a product be made in a limited quantity as opposed to it being mass produced. Therefore, rapid injection molding is a recommended process for prototyping and small-scale production. Toys, gears, and enclosures are common items that undergo prototyping. Industries that frequently utilize rapid injection molding for prototyping include appliances, aerospace, electronics, automotive, and medical.

Benefits of Injection Molding

The injection molded process itself comes with a variety of advantages. The process has a high production rate and little to no need for further processing upon completion of the injection molded part. Despite the high tooling cost, the injection molding process has a very low production cost per part. Injection molding is the process of choice to produce highly complex items that no other process can create. Additional advantages include energy efficiency, precision in forming parts, and the small amount of waste produced.

Factors to Consider When Using Injection Molding

Researching the pros and cons of various types of plastic can keep costs at a minimum. For example, not all plastics can be recycled but materials such as polystyrene, polyethylene, and nylon can be. One of the best ways to save money during the production process is recycling and reusing plastics. Many manufacturing companies have representatives that will help customers in choosing the right product the first time, which will fulfill the needs of the customer quickly and save the company money.

Additionally, injection molding machines are made up of a network of motors, heaters, and moving parts that require an extensive amount of energy to carry out their functions. Over the years, research has been done to make injection molding machines more energy efficient. One method that has been developed is a labeling system, which displays the rate of energy that is used by the machine. Regulated consumption of energy can help save a company money in production costs, and a labeling system is anticipated to assist in making that happen.

More Injection Molding Information

Injection Molding Informational Video


Diversified Plastics, Inc. Increases Capacity of Its Acceleration Station™ to Meet Fast-Turn Manufacturing Demand in Support of the COVID-19 Response

    MINNEAPOLIS—Diversified Plastics, Inc. (DPI), a custom plastic-injection molder and additive manufacturer of high-precision components, has activated its third Carbon® printer, named Einstein. A tribute to the late physicist, this Carbon printer, powered by Digital Light Synthesis™ (DLS™) technology, breaks the bond of traditional manufacturing. In just one year, customer demand has grown rapidly for DPI’s Acceleration Station services, including design for additive manufacturing assistance, Carbon DLS manufacturing, cleanroom assembly and packaging expertise.    “Now more than ever, medical device and other original-equipment manufacturers (OEMs) are looking for ways... Read More About This