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Blow Molded Plastics Manufacturers and Companies

IQS Directory provides a detailed list of blow molded plastic manufacturers and suppliers. Find blow molded plastic companies that can design, engineer, and manufacture blow molded plastics to your specifications. Peruse our website to review and discover top blow molded plastic manufacturers with roll over ads and complete product descriptions. Connect with the blow molded plastic manufacturers through our hassle-free and efficient request for quote form. You are provided company profiles, website links, locations, phone numbers, product videos, and product information. Read reviews and stay informed with product new articles. Whether you are looking for manufacturers of blow molded specialties, blow molded parts, and blow molded products of every type, IQS is the premier source for you.

  • Winfield, KS 620-221-9464

    Western Industries Plastic Products Group provides custom plastic blow molding product design, engineering, mold design & extensive capabilities and manufacturing expertise for mid- to large-part products, in both single- and dual-head processing. As a contract blow molded plastics company, we can help with any stage of a blow molding project. Contact us for all of your blow molded plastic needs.

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  • Riverside, CA 951-360-6055

    At Blow Molded Products, we have experience doing custom blow molding for a multitude of industries, including furniture, sporting goods, health and safety, electronics, and more. We are capable of performing services such as single & double wall blow molding, and mold making—all at a competitive price. Whether it is a carrying case or a custom designed product, no job is too challenging for us. We are ISO 9001 compliant. Contact us today to learn more!

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  • Sturgis, MI 269-651-9488

    With us, the customer is always King. That is our policy from start to finish. Unlike other blow molding companies, all our staff is committed to providing you with the ultimate in service and quality. Frustrated with other blow molded plastics suppliers, we struck out on our own in 2002. Since then, we have consistently provided customers with the tools they need to get the job done. Visit us online to see why we are number one.

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  • Riverside, CA 951-354-0258

    Founded in 1984, Hi-Rel Plastics & Molding, Inc. is a turn-key manufacturer who offers custom blow molding and custom plastic injection molding for a variety of industries. Value-added services include label application, assembly services, and custom packaging and shipping services. Our team has the technical and practical knowledge as well as problem-solving expertise to develop the perfect solution for your requirements. Our company is ISO 9001:2015, AS 9100 Rev D, 13485:2016 Certified.

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  • Coloma, MI 269-849-3200

    SPI Blow Molding has provided custom blow molding for a diverse range of industries since 1952. Markets served include electronics, plumbing, agricultural and many more. specializing in low to medium volume work and have a variety of materials available such as HDPE, ABS, polycarbonate, and TPE. No matter what the demands, we are focused on developing a proactive and effective solution for your needs.

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  • Williamston, MI 517-655-4351

    RNF Manufacturing has been an industry leader since 1967. We have over 300 stock items in a variety of shapes and sizes. We offer custom blow molding as well as silk printing and labeling. We want to make your design and innovation become a reality. Whether your project is big or little, you can depend on our experts for premium quality.

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businessIndustry Information

Blow Molded Plastics

Blow molded plastics are those hollow plastic products that have been created through the process of plastic blow molding. The idea of plastic blow molding originally came from glassblowing, a similar process of earlier origin, and the first blow molding machine was produced around 1938. It was with such a product that, in 1939, plastic bottles were first mass-produced in the United States. However, due to limited resources in the 1940’s, blow molding did not truly become popular until later. Today, blow molded plastics are made from thermoplastics like acetal, polyamide, polystyrene, polyvinyl chloride (PVC), low density polycarbonate (LDPE), high density polycarbonate (HDPE) and polypropylene. Typically, they are characterized by thin walls and durable structures. Blow molded plastic products are quite diverse, including items such as drums, cases, containers, beverage bottles, toys and sports equipment.

To create products such as these, manufacturers use three main processes associated with plastic blow molding: extrusion blow molding, injection blow molding and injection stretch blow molding. In extrusion blow molding (EBM), before the process begins, manufacturers take raw plastic resin, melt it down and form it into a hollow cylinder known as a parison. To kick things off, the parison is clamped into a mold, where a blow pin forces compressed air into it and it expands until it fills out the mold cavity, taking on its shape. Once it reaches its intended shape and size, the plastic is allowed to cool, typically with the aid of conduction, and harden. The last step is to remove it from the mold, which may or may not be done with the help of ejector pins. Extrusion blow molding produces the vast majority of blow molded plastics. Next, injection blow molding (IBM) is performed in three main segments: injection, blowing and ejection. First, a molten polymer is fed into a hot runner manifold and injected via nozzles into a heated cavity and onto a core pin. The polymer surrounding the pin takes on the shape of the cavity, forming an exterior, while the core pin ensures that it remains hollow. Second, this pin rotates its way to a blow molding station, where the mold is clamped around a core rod, inflated inside a preform and cooled. Lastly, once hardened, the finished product is moved into the ejection position and stripped off the core rod. Note that injection blow molding is the least commonly utilized plastic blow molding process and is only used to create small capacity bottles and jars. Its infrequent usage is due to the fact that it is difficult to control the base center during the blowing process. Also, using this method, handles cannot be added and barrier strength cannot be increased. The final blow molding process, injection stretch blow molding, works quite similarly to injection blow molding. The main way in which it differs from the former is its use of bottle-shaped preforms. Note that injection stretch blow molding can be carried out using one of two methods: single-stage or two-stage. In the first method, both the preform and the bottle are blown in the same machine. In the second method, the preforms are created first, using the injection molding process, then they are later reheated stretched into their intended shape and size. The latter step is done using pressurized air and core rods, which help the preforms stretch properly. Stretch blow molding is known for producing very high volumes of oval, rectangular or cylindrical bottles. Also, generally speaking, this process impedes bottle design very little. However, it does create somewhat high costs and it requires a larger amount of floor space than most.

When performed properly, plastic blow molding processes yield plastic products with fairly long lifespans. The key to well-made blow molded plastics is air flow: in order to create strong, uniform walls, manufacturers must take care to apply pressurized air in a controlled and constant stream. This ensures even expansion. The inconsistent application of air would lead to varying wall thicknesses, which would likely result in products with diminished durability and strength. Per the request of their customers, manufacturers can affordably create products of different shapes, sizes and capabilities. They can even inject colors into the plastic before it is formed, without compromising their fast turnaround times. Plastic manufacturers are eager to collaborate; reach out to them today to find out more.

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