An Introduction to Blow Mold and Closure Mold

Like other molding processes, blow molding is also popular in the manufacturing industry for producing thin-walled, hollow, custom plastic parts. The mold used for the process is called blow mold. It is mainly used for making parts that must have a uniform wall thickness. Blow molding is the process of choice when shape of the part is important. The process works on the same principle as glass blowing.

The process

During the process, the blow molding machine heats up the plastic and blows hot air into it causing the plastic to blow up like a balloon. It takes place inside the blow mould so when the plastic expands, it presses against the walls of the mold forming a shape. The plastic balloon hardens on cooling and the part is ejected. The entire process takes just around 2 minutes so the production efficiency is really high with blow molding.

Applications of blow molding

Blow molding is widely used for the production of plastic drums, bottles, and fuel tanks. When it comes to producing thousands of plastic bottles, manufacturers opt for this process. Blow molding is known for faster and economical production of plastic parts. The cost is even lower than injection molding. However, it’s a little more than rotational molding.

Closure mold

Cap and closure mold is used when it comes to making bottle caps. There are different types of bottle caps, and hence closure mould. Cap manufacturing may need fitment sensitive molds, galvanized caps and plugs mold. The molds can be designed in different sizes and designs based on the requirements. As all bottle caps are different in terms of design, functionality and use, mold designs also vary.

Nicety-Mould offers custom solutions for mold designing, tooling and engineering molding parts. The China based company has decades of industry presence and a vast clientele located globally.

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