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Plastic Blow Molding

A reliable source for Plastic Blow Molding information and a resource for accessing leading Plastic Blow Molding and suppliers.

Plastic blow molding is widely used because it is well-suited for the manufacturing of durable hollow parts and because it can be used to form standard and common plastic shapes, but also can be custom designed to create plastic products that are specific to a customer’s unique needs. Read More…

Plastic Blow Molding Blow molders make many different products, including toys, blow molded cases for transport and storage, garbage cans, and most commonly blow molded containers like plastic beverage bottles. The purpose of plastic blow molding is to create a uniform product that is smooth, airtight and does not require joining.
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Leading Manufacturers

Winfield, KS  |  620-221-9464

No matter what your blow molding request, Western Industries is ready to assist you. We believe in thinking outside the mold, and using unique methods to come up with solutions for our customers. We have access to state-of-the-art technology and over 100 years of combined experience serving a variety of industries. When you choose Western Industries, you have the Western Advantage. Call today for more information!

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Western Industries Plastic Products LLC $$$

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.

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Blow Molded Products $$$

Sturgis, MI  |  269-651-9488

With blow molding presses from 1 to 80 lbs., Iceberg Molding has the ability & resources for every step of your blow molding requirements - from a competitive part quote to part & product development support start to finish.

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Iceberg Molding $$$

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. With more than 35 years of experience, our quality products are unparalleled. We process an almost infinite variety of thermoplastic resins, our prices are competitive, our delivery is on time, and we offer superior customer service. Our company is ISO 9001:2015, AS 9100 Rev D, 13485:2016 Certified.

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Hi-Rel Plastics & Molding $$$

Coloma, MI  |  269-849-3200

Since 1952, SPI Blow Molding has provided custom blow molding for a diverse range of industries, such as agricultural, plumbing, electronics, and more. Our team can meet your needs with a variety of plastics, such as HDPE, ABS, polycarbonate, and TPE. Secondary operations and assembly services are also available. SPI is a leader in our industry due to our customer-oriented ability to deliver successful production solutions and unmatched product quality.

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SPI Blow Molding LLC $$$
placeholder image Western Industries Plastic Products LLC Blow Molded Products Iceberg Molding Hi-Rel Plastics & Molding SPI Blow Molding LLC

Plastic Blow Molding Plastic Blow Molding - Western Industries, Inc.

While injection molding and rotational molding are more precise methods of plastic molding, plastic blow molding offers the advantage of high-volume capacity, fast turnaround times and relatively low costs. The process usually takes a matter of seconds and therefore blow molding machines can produce high-volumes of durable plastic products in short periods of time with minimal finishing requirements.

In the basic process of plastic blow molding, plastic is melted and softened and formed into a parison which is then clamped into a mold. A blow pin is then used to force compressed air into the parison, and the molten plastic expands to fit the shape of the cavity. Controlled and constant air flow is essential to the quality of the final outcome as varying wall thicknesses compromise the strength and durability of the product.

Blow molders have to ensure the constant expansion of the plastic in the mold to achieve uniform wall thickness in the product. The cavity is then cooled, usually by conduction, and the hardened plastic product is removed from the mold, sometimes with the assistance of ejector pins. There are three main processes of plastic blow molding: injection, extrusion and stretch. Injection blow molding is a combination of standard injection molding methods and plastic blow molding and is typically used to create smaller products that require greater precision.

Extrusion molding allows for a wide variety of shapes and sizes, with the added benefit of handleware capabilities, and yet results in a thin seam where the two mirror parts of the cavity joined. Stretch molding is commonly used to produce vast quantities of plastic bottles.

Plastic Blow Molding Informational Video