Filed Under:
Manufacturing
Published on
April 17, 2025
Blow molding is one of the fundamental processes in manufacturing hollow plastic products and containers. At Royal Case Company, we employ molding processes to supply our clients with sturdy, high-quality, hollow plastic cases that are specifically suited to their needs. In this blog entry, we will take you through the blow molding process, the three primary stages of that process, and explore why blow molding is a far more flexible and versatile solution to many problems than either injection molding or extrusion.
The process of blow molding has several distinct stages:
Formation of Tube – Heated plastic resin is dispensed as a tube-like piece known as a parison.
Inflation of Air – Air is blown into the parison, expanding it to create a hallow cavity.
Closing the Mold – The parison is encased in a specialized mold shaped like the final product.
Cooling and Solidification – The plastic sits in the mold to cool and harden into the final product.
Ejection of Finished Product – Removing the blow-molded piece from the mold, trimming and performing necessary inspections to ensure the piece meets specifications.
The simplicity and efficiency of blow molding makes it appropriate for large to small, uniform, and durable plastic pieces. It often used for such items as jugs, bottles, containers and cases.
Blow molding offers multiple benefits:
Economical for Large Production Runs – Inexpensive, fast, repeatable process for making many plastic parts.
Strong but Lightweight Products – Good a wide variety of product that need lightweight protection.
Great for a Variety of Shapes and Textures – Molds can be made for almost any shape and can include surface textures, logos, and other features.
Blow molding is crucial in numerous industries—
The packaging industry—containers, canisters, and packaging solutions for food, beverages, and consumer goods.
The automotive sector—hollow components like gas tanks and fluid reservoirs.
Medical Supplies—sterile containers, reservoirs, and other critical medical packaging.
Household products—blow-molded containers, bottles, and daily-use items.
Product Protection – OEM product cases to house and protect specific consumer and industry products.
Blow molding is a method of manufacturing that is very versatile, efficient, and cost-effective. It offers many exacting specifications an industry might need. Royal Case Company specializes in custom blow molded cases for OEM products manufacturers. We handle everything from mold production and interiors, to product ready case delivery. Contact us today to learn more!
Author: Kelvin Gentry
Kelvin Gentry is the Marketing Director for Royal Case Company Inc. based out of Sherman, TX.
