Understanding the Principle of Extrusion Blow Molding Machines

April 10, 2023

extrusion blow molding machines are widely used in the manufacturing industry for producing plastic bottles, containers, and other hollow products with a seamless finish. This process involves melting plastic resin, extruding it into a tube-like shape, and then inflating it into a mold to form the desired shape. In this article, we will explore the detailed principle of extrusion blow molding machine.

Extrusion Blow Molding Machine

Melting and Extrusion:

The first step in the extrusion blow molding process is to melt the plastic resin pellets in a heated extruder. The extruder is a machine that uses a screw Conveyor to mix and compress the plastic pellets while gradually increasing the temperature of the melting chamber. Once the plastic is heated to the right temperature, it is forced out of the extruder through a small opening called the die head.

Blow Molding:

After the melted plastic is extruded from the die head, it is clamped onto a mold that is shaped like the final product. The mold consists of two halves that come together to create a hollow cavity in the shape of the desired product. The extruded tube of plastic is then inflated by a burst of pressurized air, which forces it to expand and fill the cavity of the mold.

Cooling and Ejection:

Once the plastic has formed the shape of the mold, it is allowed to cool and solidify. This process takes place while the mold remains closed to maintain the shape of the product. After the plastic has cooled, the mold is opened, and the finished product is ejected from the machine.

Benefits of Extrusion Blow Molding:

Extrusion blow molding process is useful for producing hollow plastic products with a seamless finish. Producing large quantities of identical products is possible through this process by using multi-cavity mold, which reduces the time and cost of production. The machines are also known for their high accuracy and consistency, ensuring that each product has the same dimensions and specifications.

In conclusion, Extrusion Blow Molding Machine has become an essential part of the manufacturing industry. Understanding the principles of this process can help improve the efficiency and quality of production. With new technologies and advancements in resin materials, the blow molding process will continue to evolve and offer new possibilities for the production of different consumer products.

Author:

Mr. Wu

E-mail:

overseas@spemachine.com

Phone/WhatsApp:

8613825516334