What is the difference between extrusion blow molding and blow molding?

## What is the difference between extrusion blow molding and blow molding?

1. **What is extrusion blow molding?**.

Extrusion blow molding is a manufacturing process used to create hollow plastic parts. The process starts with melting plastic resin and then extruding it into a hollow tube. This tube is then clamped into a mold, and pressurized air is blown into the tube, causing it to inflate and take the shape of the mold. After the plastic cools and hardens, the mold is opened, and the newly formed part is ejected.

2. **What is blow molding?**.

Blow molding is a manufacturing process that is used to create hollow objects, such as bottles and containers, out of plastic. The process begins with a hollow tube of molten plastic called a parison. The parison is placed in a mold, and pressurized air is blown into the tube, causing it to expand and take the shape of the mold. Once the plastic has cooled and hardened, the mold is opened, and the finished part is removed.

3. **What is the difference between extrusion blow molding and blow molding?**.

The main difference between extrusion blow molding and blow molding lies in the way the hollow plastic tube is created. In extrusion blow molding, the plastic resin is melted and extruded into a tube before being placed in the mold. This allows for more control over the thickness and shape of the final product. On the other hand, traditional blow molding starts with a pre-formed parison that is placed in the mold, limiting the control over the shape and thickness of the final product.

Overall, extrusion blow molding is typically used for producing larger, more complex parts, while blow molding is often used for simpler, smaller objects such as bottles and containers. Both processes are efficient and cost-effective ways to produce hollow plastic products, with extrusion blow molding offering more flexibility and control over the final product.

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