What you Need to Know about Plastic Burrs and Deburring – Part II

In the previous post, we had provided an introduction to burr formation in component manufacturing. We also elaborated on the various types of burrs that can get created. As a follow up to the previous post, we are going to discuss the different types of burr removal processes.

What is Deburring?

The process of removing the unwanted piece from a material is called deburring. Deburring has become an important task, as many customers are demanding burr-free products. One of the reasons why manufacturers charge exorbitantly is because deburring takes up a substantial portion of manufacturing costs.

Both automated and manual methods are used to remove burrs. However, manufacturers prefer to use manual methods. The reason is that manufacturers have more control over the deburring process. For example, if a work piece has internal burrs, then it can be difficult for an automated machine to remove it. Also, as burrs come in different sizes, shapes, and lengths, using manual labor will be easier to remove them.

Types of Deburring Processes

The three types of deburring processes given below are specifically designed to remove burrs on plastic components.

• Manual Deburring: This is the most common deburring process used. Manual deburring utilizes low cost tools, and provides the manufacturer with great flexibility during the deburring process. It also puts a lot of stress on the materials, and the component can be inspected immediately after the process has been completed. While manual deburring is used with plastic materials, it can also be used on metal components.
• Mechanical Deburring: This process sands or grinds the burr off the component. Mechanical deburring is mainly used on materials that do not require a smooth finish; for example, PVC.
• Cryogenic Deburring and Deflashing: This is the most efficient and least expensive process used to remove flash. The process utilizes liquid nitrogen to lower the component’s temperature to a point, where the material becomes brittle. Once this is done, the deflashing machine removes the burr easily, while ensuring that the finish is not altered. Cryogenic deburring and deflashing can be used on rubber, plastic, silicone, and light metal.

When you combine the knowledge of different burrs types and deburring processes, you can easily choose the right method. Before you use them on a part, ensure that you test these processes on some spare materials.