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Insert Molding Manufacturers and Companies

IQS Directory provides useful search tools to find leading insert molding companies and suppliers. Utilize our website to review and source insert molding companies with our easy-to-use features which allow you to locate insert molding companies that will design, engineer, and provide insert molding for your exact specifications. Our request for quote forms make it easy to connect with leading insert molding companies. View company profiles, website links, locations, phone number, product videos, customer reviews, product specific news articles and other production information. We are a leading manufacturer directory who will connect you with the right manufacturers whether you are looking for vinyl insert trim molding, double-shot molding, or auto insert molding.

Industry Information
  • Cleveland, OH

    GSH Industries’ 25 years experience in insert moldings coupled with its state-of-the-art manufacturing facility can provide you with industry leading service. For all inquiries and quotes, visit our website or contact us today for superior personal service from our trained and experienced staff.

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  • Holland, OH

    ICOMold specializes in rapid injection mold, custom injection mold, plastic mold and plastic injection molding and is structured to quickly produce low-cost pre-hardened-steel plastic injection molds for prototypes and production parts.ICOQuote provide instant injection mold quote.

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  • Shelby Township, MI

    Located in Shelby Township, MI, MSI Mold has over 30 years of experience in the injection molding business. Our state-of-the-art equipment enables us to make intricately designed products to suit a variety of industries. We believe in drama-free and delay-free customer service. Get in touch with us today, and let us make your next product!

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  • Stuart, FL

    Insert 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

    We have a manufacturing history dating back to 1963 and our innovated processes have greatly improved over the years. These high performance products are long lasting and we aim to greatly improve the quality of all of our injected molded products. Our moldings are extensively tested to ensure the best products for our customers. Visit our website for more information.

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  • Minneapolis, MN

    Founded in 1977, MN, Diversified Plastics, Inc. is a full-service plastic injection parts manufacturer. The company produces complex in-house tooling and provides precision prototype production, close-tolerance plastic injection molding, clean room assembly and value-added services. Diversified Plastics uses a wide range of injection molding plastic resins, including engineering, high-performance and commodity grade resins.

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  • Neptune City, NJ

    If you want high quality plastic molding products, you’ve come to the right place! We are a large supplier of a variety of molded plastic parts of all sizes and types. We have the inexpensive solution to your needs that can get the job done right the first time. You will find that our attention to detail sets us apart from the competition. Give us a call or visit our website today for more info!

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businessIndustry Information

Insert Molding

Insert molding is a plastic injection molding process in which an insert, such as an object or component, is placed into the mold cavity and then injected with molten plastic that is thus molded around the insert. Insert molding is a more effective alternative to the assembly of discrete parts by means of soldering, adhesives or fasteners.

Some benefits of plastic insert molding include: lower costs, since multiple tasks are being done at once both labor and assembly time is saved; greater durability, the plastic resins mold to the insert more securely than other joining methods; and lighter components, plastic resin weighs less than metal connectors which would typically have joined the components. Insert molding serves industries such as electronics, medical, military, industrial, automotive, aerospace, food processing, commercial, residential, cosmetic and construction. Typical insert injection molding applications include cable embedded electronics, medical devices, printers, thermostats, aerosol nozzles, electrical plugs, screwdrivers, needle hubs, bifurcations and threaded fasteners. Materials used during the insert molding process includes polystyrene, polyvinyl chloride, polyethylene, polypropylene, thermoplastic elastomers and many more engineering plastics.

Insert molding is done through an injection molding machine. On the top of the machine is a hopper, through which the plastic granules enter the barrel of the machine. In the barrel, the plastic granules are heated until they become molten plastic. A reciprocating screw inside of the barrel carries the plastic granules into the mold cavity by way of a nozzle. The nozzle leads directly into the mold cavity. The mold is attached to a moveable platen so that it can push into and pull back from the mold cavity. An insert, which can be metal or plastic, is placed into the mold cavity just before molding. The molten plastic is then injected into the cavity through the nozzle and molds around the insert piece. Once the plastic has cooled, the mold is opened and the newly joined components are removed. Two types of bonding occur during insert molding; mechanical and molecular. Molecular bonding takes place by either shrinking the encapsulating plastic resin around the insert as it cools or surrounding the irregularities on the insert’s surface by the plastic resin. Mechanical bonding, however, only takes place when the insert’s material is the same as or very similar to the plastic resin. In addition there are three types of insert molding: low volume, 100-1000 parts that the operator inserts all at once; medium volume, 1000-10,000 parts that the operator loads in multiples and is aided by a loading device; and high volume, 100,000 parts or more that are loaded automatically.

More Insert Molding



Insert Molding
Insert Molding
Insert Molding - GSH Industries, Inc.
Insert Molding - GSH Industries, Inc.



Insert Molding Informational Video